CN100519224C

CN100519224C - Ring spring binder mechanism

Info

Publication number: CN100519224C
Application number: CNB031200028A
Authority: CN
Inventors: 郑琦
Original assignee: World Wide Stationery Manufacturing Co Ltd
Current assignee: World Wide Stationery Manufacturing Co Ltd
Priority date: 2003-03-07
Filing date: 2003-03-07
Publication date: 2009-07-29
Anticipated expiration: 2023-03-07
Also published as: CN1526572A

Abstract

The ring spring binder mechanism for holding loose leaves includes one slender rigid sheet; loose leaf holding rings, each of which comprising one bent ring element with free ends capable of taking out, one pair of tubular columns separated by the bent ring element and fixed onto the slender sheet for accepting the free ends of the bent ring element; one ring closing structure for the bent ring elements to be inserted into the columns to hold the loose leaves; one ring opening mechanism for the bent ring elements to be taken out from the columns to take out the loose leaves; one locking mechanism including one locking rod supported by the slender sheet for locking the bent ring elements with ends inside the columns.

Description

Annular mechanism for loose-leaf binder

Technical field

The present invention relates to be used for the loose-leaf binder of the clamping loose-leaf page, particularly a kind of loose-leaf binder mechanism with improved retaining mechanism.

Background technology

Circular loose-leaf binder generally comprise with spine on the linkwork becket element that pivots and to connect, be used to open and close relative loop member.At open position, loop member is spaced apart, and the loose leaf paper page that will have the preform hole is received on one group of loop member.In the closed position, relative loop member meshes together, and forms a continuous loop, and the page can rotate thereon.Usually, the annulus element is enough not big to hold a large amount of paper.In addition, linkwork produces the very big chucking power that makes the loop member quick closedown with very big power, can cause injury.

The circular loose-leaf binder design of replacing exists, and has cancelled linkwork by the U-loop element that provides and be connected to the erection column engagement on the spine.But retaining mechanism complexity, inconvenient operation and the difficulty of these loose-leaf binders.The existing mechanism that has the U-loop element further makes the complexity of closing of loop member, because must be with the retaining mechanism release before being assembled to loop member on the erection column.In addition, existing mechanism requires loop member to aim at specific erection column specially, and this further makes the complexity of closing of loop member.

Summary of the invention

In several purposes of the present invention and feature, it may be noted that provides a kind of annular mechanism for loose-leaf binder that the operator is damaged of preventing; The such mechanism that is easy to open or close is provided; Be provided at the such mechanism that keeps a large amount of loose-leaf pages in the enough little zone; Such mechanism that can firmly lock is provided; Such mechanism of easy release is provided; And such mechanism that available and reliable in operation and economy rational in infrastructure are provided.

Usually, annular mechanism for loose-leaf binder according to the present invention is used for fixing the loose-leaf page.This mechanism comprises that one has the elongated board of the roughly rigidity of end face and bottom surface.Be used to keep the ring of the above-mentioned loose-leaf page to comprise having free-ended crooked loop member of taking out, and be used for the isolated a pair of tubulose post of each above-mentioned crooked loop member.Every pair of tubulose post is fastened on the above-mentioned elongated board, is used to receive each free end of above-mentioned crooked loop member.These rings have a closing structure, and wherein loop member is inserted in the tubulose post, form a continuous basically closed-loop, and the loose-leaf page that allows to be held by environmental protection moves to another tubulose post along ring from one of them tubulose post.These rings have a Unclosing structure, and wherein the loop member of each ring is taken out from the tubulose post, allow the loose-leaf page from encircling taking-up.Annular mechanism for loose-leaf binder has a retaining mechanism, is used for releasedly the crooked loop member of tubulose post is locked in the closing structure of ring.This retaining mechanism comprises a locking bar by elongated board supporting, is used for moving with respect to elongated board, with simultaneously and be received in two free ends engagements of the crooked loop member in the tubulose post, thereby prevents that above-mentioned crooked loop member from extracting out from the tubulose post.

In another aspect of this invention, this mechanism comprises that one has the elongated board of the roughly rigidity of end face and bottom surface.Be used to keep the ring of the above-mentioned loose-leaf page to comprise that respectively one has free-ended crooked loop member of taking out, and a pair of isolated tubulose post that is used for each above-mentioned crooked loop member.Every pair of tubulose post is fastened on the above-mentioned elongated board, is used to receive each free end of above-mentioned crooked loop member.These rings have a closing structure, and wherein loop member is inserted in the tubulose post, form a continuous basically closed-loop, and the loose-leaf page that allows to be held by environmental protection moves to another tubulose post along ring from one of them tubulose post.These rings have a Unclosing structure, and wherein the loop member of each ring is taken out from the tubulose post, allow the loose-leaf page from encircling taking-up.Annular mechanism for loose-leaf binder has a retaining mechanism, is used for releasedly the crooked loop member of tubulose post is locked in the closing structure of ring.This retaining mechanism is supported by elongated board, is used for moving between a locked position and an off-position with respect to elongated board, at locked position, with the free end engagement that is received in the crooked loop member in the tubulose post, in the off-position, loop member is released, and takes out from the tubulose post.Crooked loop member is used for that snap-on is engaged in the tubulose post after loop member is inserted post.

In still another aspect of the invention, this this mechanism comprises that one has the elongated board of the roughly rigidity of end face and bottom surface.Be used to keep the ring of the above-mentioned loose-leaf page to comprise having free-ended crooked loop member of taking out, and be used for the isolated a pair of tubulose post of each above-mentioned crooked loop member.Every pair of tubulose post is fastened on the above-mentioned elongated board, is used to receive each free end of above-mentioned crooked loop member.These rings have a closing structure, and wherein loop member is inserted in the tubulose post, form a continuous basically closed-loop, and the loose-leaf page that allows to be held by environmental protection moves to another tubulose post along ring from one of them tubulose post.These rings have a Unclosing structure, and wherein the loop member of each ring is taken out from the tubulose post, allow the loose-leaf page from encircling taking-up.Retaining mechanism can with the engagement of crooked loop member, be used for releasedly the crooked loop member of tubulose post is locked in the closing structure of ring.Crooked loop member can be respectively in a primary importance and a second place are inserted tubulose post to reply, in primary importance, first free end is received in the first tubulose post, second free end is received in the second tubulose post, in the second place, first free end is received in the second tubulose post, and second free end is received in the first tubulose post.Crooked loop member comprises a locking structure, and this locking structure can mesh with retaining mechanism, loop member is locked in the tubulose post, no matter and whether loop member is in the primary importance or the second place.

Other purpose of the present invention and feature a part below become clear, and a part is pointed out.

Brief description

Fig. 1 is in the perspective view of closing with the first embodiment of the invention annular mechanism for loose-leaf binder of locking state;

Fig. 2 is the decomposition diagram of the first embodiment mechanism;

Fig. 3 is the side view of this mechanism;

Fig. 3 A is the end view of this mechanism;

Fig. 3 B is the top view of this mechanism;

Fig. 4 is the partial sectional view of being got along Fig. 3 B midplane 4-4;

Fig. 5 is that mechanism is in the decomposition diagram of closing with locked position among Fig. 1, has removed a part of elongated board and three tubulose posts;

Fig. 6 is the bottom perspective view of mechanism among Fig. 1;

Fig. 7 is that mechanism is in the decomposition diagram of closing with the off-position, has removed a part of elongated board and three tubulose posts;

Fig. 8 is that mechanism is in the perspective view of closing with the off-position;

Fig. 9 is the bottom perspective view of mechanism among Fig. 8;

Figure 10 is that mechanism is in the decomposition diagram of opening with the off-position, has removed a part of elongated board and three tubulose posts;

Figure 11 is that mechanism is in the perspective view of opening with locked position;

Figure 12 is the decomposition diagram that mechanism is in the centre position between release and the locked position;

Figure 12 A is the detailed section view of being got along Figure 12 midplane 12A-12A, and the loop member that is received in the tubulose post is shown;

Figure 12 B is the detailed section view similar to Figure 12 A, loop member in the tubulose post further closing in Fig. 4 with locked position advance;

Figure 13 is the perspective view that the file of annular mechanism for loose-leaf binder is housed;

Figure 14 is the perspective view according to the annular mechanism for loose-leaf binder of second embodiment of the invention;

Figure 14 A is the side view of second embodiment.

In the view of whole accompanying drawings, corresponding reference symbolic representation corresponding components.

DETAILED DESCRIPTION OF THE PREFERRED

Referring now to accompanying drawing, Fig. 1-7 particularly is according to annular mechanism for loose-leaf binder of the present invention 1 expression of applying greatly.This mechanism 1 comprises an elongated board 3, and this elongated board 3 has three pairs of tubulose posts 5 mounted thereto and three and is received in each removedly to the loop member on the erection column 7.This mechanism 1 generally can be positioned between a Unclosing structure and the closing structure, and in Unclosing structure, loop member 7 is taken out from post 5, in closing structure, loop member 7 is inserted in the post, forms the ring of a sealing, is used to keep the loose-leaf page or other similar material (not shown).Circular loose-leaf binder of the present invention comprises retaining mechanisms of applying 11 expressions greatly, is used for and loop member 7 engagement, releasedly loop member is locked at closing structure.

Shown in Fig. 1-6, the shape of plate 3 is elongated rectangles, has a generally flat end face 13 and a generally flat bottom surface 15.Plate 3 has roughly 21, two roughly relative lateral ends 25 of opposing longitudinal edges of 19, two of central longitudinal axis, and the bight 27 of four roundings of transition between the edge of plate and end.Longitudinal edge 21, lateral ends 25 and rounded corners 27 around plate 3 form a periphery edge 31, thereby form a mating surface (Figure 13) that contacts with file front cover 35.Shown in Fig. 2 and 13, two circular holes 39 roughly centrally are positioned on the longitudinal axis 19 near lateral ends 25 on the plate 3, are used to receive with being connected be used for mechanism 1 is fastened to erection column 41 on the file front cover 35.When mechanism 1 was connected on the front cover 35 as shown in figure 13, the space 45 of bottom surface 15 bottoms of elongated board 3 contacted and closes basically with front cover 35 owing to edge 31.Rectangular aperture 47 in one of them lateral ends 25 on the plate 3 allows a part of retaining mechanism 11 (describing below) to stretch out from the space 45 of sealing.

Shown in Fig. 2-3B, the end face 13 of plate 3 has three pairs with the equidistant location of longitudinal axis 19 and the spaced apart and protruding installation shoulders 51 of a central opening 53 are arranged onboard.One inner passage, 55 (see figure 7)s are near lateral ends 25 location of the plate with rectangular aperture 47.The function of inner passage 55 (as the projection on plate 3 top sides) is described below.Three isolated square recesses 59 centering on the longitudinal axis 19 of plate 3, has circular open 61, two recesses in outside are inwardly spaced apart from the installation shoulder 51 of two pairs of rises of outermost, and intermediate recesses is installed on the center line of the plate between the shoulder in a pair of projection in centre.Plate 3 has a kerf thin slice 65, and this otch thin slice 65 is centered on the longitudinal axis 19, and is bent downwardly, and reaches below the end face of plate.Be appreciated that elongated board 3 can be made of metal, perhaps by having enough rigidity so that the stable installation for mechanism's 1 other parts to be provided, in light weight again simultaneously and other material that save material and manufacturing cost is made.Have plate or other shape, comprise irregularly shaped shell, perhaps have the mechanism with file all-in-one-piece shell, do not depart from the scope of the present invention.

In the embodiment shown, tubulose post 5 is connected on the plate 3, is used to receive the loop member 7 that is in closing structure, and allows the end of loop member to pass central opening 53 in the installation shoulder 51 of the projection on the elongated board end face 13.As shown in Fig. 1-4, tubulose post 5 is generally cylindrical tube, has the bottom that is used to receive the open top 75 of the free-ended amplification of loop member and extends through elongated board 3.As shown in Figure 3A, opening 75 has along the portion that extends axially of the horizontal outside of post 5.The end that the shape of each opening 75 provides the open area that the increases cross section of post 5 (promptly greater than) to make loop member 7 can be fast and is easily inserted in the tubulose post 5.

As shown in Fig. 2-4, the bottom of post 5 has an outer circular edge 85 that is positioned at free end 87 tops of post, and the projection that is used on the end face 13 with elongated board 3 is installed shoulder 51 engagements.As shown in Figure 4, tubulose post 5 is connected on the elongated board 3 by the bottom is inserted in the central opening 53, makes outer rim 85 and projection that shoulder 51 engagements are installed.The free end 87 of post 5 curls and comes, and forms the flange 89 of the bottom surface 15 of pressing elongated board 3.The engagement of shoulder 51 and contacting of flange 89 pressure plates bottom surfaces are installed and post 5 is connected on the plate 3 by the projection on the end face 13 of outer rim 85 and plate.Be appreciated that and use other method that tubulose post 5 is connected to (as welding, low-temperature welding or thread connection) on the elongated board 3.

As can seeing from Fig. 2, each in three loop members 7 is the form of the U-loop that can take out, and having packs into is installed in free end 95 in the tubulose post 5 on the elongated board 3.In the embodiment shown, the conventional solid hopkinson bar made by suitable material such as steel of loop member 7 is made.Be appreciated that loop member 7 needs not to be solid, and can make by other suitable material.Each loop member 7 has a top arch section 97, has two straight-arms 99 that extend to the almost parallel of each free end 95 from arch section, and free end 95 comprises a lockings structure of applying 103 expressions greatly, is used for and retaining mechanism 11 engagements.As shown in Figure 4, each locking structure 103 comprises a tapered end 107, and this end 107 has end and two the radially groove opposite 111 that are positioned at the tapered end top that define the free end 95 of each arm 99.Loop member 7 is configured to, and in the closing structure of mechanism 1, groove 111 and tapered end 107 are passed the base flange 89 of tubulose erection column 5, with retaining mechanism 11 engagements.The locking structure 103 that is appreciated that loop member 7 can have other design.For example, can replace tapered end 107 with conical end, ball-shaped end or the end with other appropriate configuration.In addition, can replace relative groove 111 with arc groove on the circumferential groove on the loop member 7, the loop member opposite side or the opening with other appropriate configuration.

Retaining mechanism 11 is provided for locking structure 103 engagements with loop member, thereby releasedly loop member is locked in the closing structure of ring.In the embodiment shown, retaining mechanism 11 comprises and the slide locking bar 121 of engagement of the bottom surface 15 of elongated board 3, its can one with the locked positions of locking structure 103 engagements of loop member 7 and off-position that a loop member can freely be extracted out from tubulose post 5 between mobile.

As shown in Figure 2, locking bar 121 has a center rectangle part 123 and three pairs and divides the thin slice 125 that stretches out from central division.Finger grip 129 form core 123 on turn over the end, the rectangular aperture 47 that passes in one of them lateral ends 25 of elongated board 3 stretches out from closed area 45.Finger grip 129 is bent upwards the core 123 that becomes to be substantially perpendicular to locking bar 121, is beneficial to catch locking bar, with respect to elongated board 3 slide retaining mechanisms 11 (below will describe in more detail).As shown in Figure 4, the leading edge portion 135 of each thin slice 125 is received in the corresponding recesses 111 of the loop member 7 under the closing structure that is in mechanism 1.This of the most close finger grip 129 has the angled marginal portion 137 relative with leading edge portion 135 to thin slice 125, thereby can not interfere with the rounded corners 27 of elongated board 3 when locking bar 121 is retracted to the off-position.Locking bar 121 has the protruding block 141 that is positioned on the roughly close core 123 of finger grip 129, and it is meshed with the elongated board 3 of close opening 47 top edges selectively.The elongated slot 143 that is arranged in locking bar 121 cores 123 receives slidably by locking bar mechanism 1 is connected to one of them erection column 41 on the loose-leaf binder front cover 35.As shown in Fig. 2 and 6, locking bar 121 is slidably mounted on the elongated board 3 by three tubulose mount pins 145, in the circular open 61 in the square recess 59 of these three mount pins, 145 insertion plates.The isolated elongated mounting grooves 147 of three of core 123 that are arranged in locking bar 121 slide and receive three mount pins 145 below the elongated boards 3.In the embodiment shown, each mount pin 145 has one and is received in top end cover 149 and in each square recess 59 of elongated board 3 and is used for locking bar 121 is remained on the bottom that expands outwardly 151 on the mount pin.Being appreciated that the present invention also it is contemplated that is connected to other conventional method on the elongated board with locking bar.As shown in Fig. 2 and 6, locking bar 121 has the thin slice that penetrates 153 and rectangular aperture 155 that roughly is positioned at core near thin slice that stretches out from the core 123 of bar downwards.Curved cuts thin slice 65 passes opening 155 slave plates 3 and extends downwards.

In the embodiment shown, retaining mechanism 11 comprises that also one is used for locking bar 121 is biased into the spring 161 of locked position, and at locked position, thin slice 125 is received in the groove 111 of loop member 7.As shown in Fig. 6 and 7, first end of spring 161 is connected with curved cuts thin slice 65 on the elongated board, on second end and the locking bar 121 downwards the thin slice 153 of expansion be connected.

In the operation, annular mechanism for loose-leaf binder 1 of the present invention generally can be positioned between a closing structure and the Unclosing structure.In the closing structure of illustrated embodiment 1, loop member 7 is received in the tubulose post 5, and (with post) forms a continuous basically closed-loop, and the loose-leaf page (not shown) that allows to be held by environmental protection moves to another tubulose post along ring from one of them tubulose post.In the Unclosing structure shown in Figure 10 and 11, loop member 7 is taken out from tubulose post 5, allows the loose-leaf page to take out or install on the tubulose post from encircling.Retaining mechanism 11 of the present invention can slide between a locked position and an off-position, and at locked position, locking bar thin slice 125 is positioned to contact (Fig. 3-6) with loop member 7, and in the off-position, thin slice is positioned to roughly leave loop member (Fig. 7-10).

The closing structure of loop member 7 shown in Fig. 1 and the 3-6, retaining mechanism 11 is positioned at locked position, prevents that loop member breaks away from from tubulose post 5.Shown in Fig. 4-6, the power of spring 161 is biased into locked position with locking bar 121, and wherein the leading edge portion 135 of thin slice 125 meshes with groove 111 lockings that the locking of loop member 7 is constructed on 103.As shown in Figure 4, contacting by opposing of the groove 111 of thin slice 125 and loop member 7 is applied to the power that moves up on the loop member and loop member is locked on the tubulose post 5.

The off-position of retaining mechanism 11 among the present invention 1 shown in Fig. 7-10.Be appreciated that when loop member 7 is in and close or can obtain the off-position during Unclosing structure.Among Fig. 7, an actuation force is applied on the finger grip 129 on the locking bar 121, and locking bar is slided into the positions of extracting out farthest from elongated board 3, and wherein the thin slice on the locking bar 125 moves away loop member 7.By mobile slightly locking bar 121 downwards, block 141 can pass from opening 47.The wedge shape of block 141 has produced downward motion naturally.After discharging locking bar 121, the power of spring 161 is upwards returned it, makes block 141 near opening 47 and plate 3 engagements, prevents to be moved further and gets back in the plate.As shown in Fig. 8-10, block 141 remains on the off-position with the engagement of elongated board 3 with locking bar 121, allow loop member 7 from tubulose post 5, to extract out,, and do not need to act on simultaneously effectively on the finger grip 129 so that locking bar is remained on the off-position with the Unclosing structure of realization mechanism 1.In order to retract locked position, locking bar 121 is moved down, make block 141 skip the edge of opening 47.After block 141 was got back in the closed area 45 of plate 3, locking bar 121 returned and moves up, and block is received in the passage 55.Block 141 can move freely in passage 55, and can not hinder moving of locking bar 121.

In annular mechanism for loose-leaf binder 1 of the present invention, loop member 7 can be inserted in the post 5, makes mechanism return closing structure when being in off-position or locked position with convenient retaining mechanism.When mechanism 1 was closed in the off-position of retaining mechanism 11, loop member 7 can freely be inserted in the tubulose post 5, because the leading edge 135 of thin slice 125 remains on the position away from the locking structure 103 of loop member.After loop member 7 was inserted, retaining mechanism 11 was movable to locked position, and wherein the leading edge 135 of thin slice 125 is received in the groove 111 on the free end 95 of loop member.

Replacedly, the present invention 1 loop member 7 is configured to when locking bar 121 is in locked position to allow to insert in the tubulose post 5 equally, at locked position, the leading edge 135 of thin slice 125 be positioned at tubulose post 5 under.As shown in Figure 11-12B, the leading edge portion 135 that the tapered end 107 of loop member 7 is configured to the locking bar thin slice 125 below the opening 53 that is positioned at elongated board 3 contacts.Shown in the centre position of Figure 12 and 12A, one of them relative convergence surface of the tapered end 107 of each loop member contacts with the leading edge portion 135 of locking bar 121.When the locking structure 103 of loop member 7 advances downwards as shown in Figure 12B, leading edge portion 135 is on the convergence surface of wedge 107, make locking bar 121 produce the cam action opposite, locking bar is moved towards the off-position of export-oriented retaining mechanism 11 slightly from elongated board 3 with the biasing force of spring 161.When loop member 7 was further inserted in the tubulose post 5, the groove 111 of loop member was aimed at the leading edge 135 of thin slice 125 as shown in Figure 4.The biasing force of spring 161 moves to locking bar 121 and the engagement of loop member 7 snap-ons, thin slice 125 is received in the groove 111, thereby locking bar is positioned at locked position, and loop member is remained in the tubulose post 5.

The structure of the locking structure 103 of loop member 7 allows closed loop element quickly and easily, and does not consider that loop member arm 99 is aligned in the particular column 5.For example, each loop member 7 can be inserted in the mechanism 1 in position shown in Figure 11, and wherein the first arm 99A is received among the first tubulose post 5A, and the second arm 99B is received among the second tubulose post 5B.Structure with locking structure 103 of tapered end 107 also allows the insertion Rotate 180 degree of loop member 7, and the second arm 99B is received among the first tubulose post 5A, and the first arm 99A is received among the second tubulose post 5B.The tapered end 107 of each loop member 7 and radially groove opposite 111 be used for and locking bar 121 snap-ons engagements, and do not consider the orientation of loop member 7.As shown in Figure 12 A and 12B, loop member 7 is configured to make the leading edge portion 135 of locking bar thin slice 125 to mesh with the opposite side of tapered end 107, produces the cam action of locking bar 121, and does not consider the orientation of loop member.In addition, each loop member 7 is configured to make the both sides of relative groove 111 to mesh with the thin slice 125 of locking bar 121, to realize the snap-on engagement of loop member 7 as shown in Figure 4.Except can putting upside down, loop member 7 is also inserted among in three pairs of tubulose posts 5 any interchangeably, assembles loop member in the closing structure thereby be implemented in easily.Annular mechanism for loose-leaf binder 1 of the present invention can simplify the operation, thereby reduce to the required installation time of the reversible and interchangeable loop member of closing structure assembling 7, because loop member can be assembled in tubulose post 5 fast, do not consider a specific straight-arm 99 is cooperated with a specific tubulose post, do not consider a specific loop member is cooperated with specific right tubulose post yet.

Apply greatly shown in Figure 14 and the 14A 201 the expression second embodiment of the invention.This embodiment 201 is similar substantially to first embodiment 1, and difference is that the loop member 203 of second embodiment has top 205 always, and this top 205 is substantially perpendicular to two parallel straight-arms 207 that stretch out from top.The arm 207 of each loop member 203 is received in a pair of tubulose post 211 with a cylindrical side wall and a circular top opening 215.Be appreciated that the ring with other shape and the mechanism of tubular opening do not depart from the scope of the present invention.

When introducing the element of the present invention or its preferred embodiment, article " a ", " an " and " said " expression have one or more elements.Term " comprising ", " including " and " having " expression include, and expression can also have other element except that listed element.

In view of above-mentioned, can see that some purposes of the present invention realize that other advantageous effects also obtains.

Owing to can carry out multiple change without departing from the present invention, therefore comprise in the specification in the above and accompanying drawing in the full content that shows be interpreted as schematically, rather than on the limiting meaning.

Claims

1. annular mechanism for loose-leaf binder that is used for fixing loose-leaf face face, this mechanism comprises:

One has the elongated board of the substantially rigid of end face and bottom surface;

Be used to keep the ring of the above-mentioned loose-leaf page, every group of ring comprises a pair of spaced tubulose post on the above-mentioned elongated board that is fastened on, can be inserted into the crooked loop member in above-mentioned every pair of tubulose post respectively, above-mentioned crooked loop member has two free ends that pass above-mentioned tubulose post, these rings have a closed condition and and open state, in off position, loop member is inserted in the tubulose post, form a continuous basically closed-loop, the loose-leaf page that permission is held by environmental protection moves to another tubulose post along ring from one of them tubulose post, in open mode, the loop member of each ring is taken out from the tubulose post, allows the loose-leaf page from encircling taking-up;

Retaining mechanism, be used for releasedly the crooked loop member of tubulose post is locked in the closed condition of ring, this retaining mechanism comprises the locking bar by the elongated board supporting, with simultaneously be received in the tubulose post in two free ends of crooked loop member be meshed, thereby prevent that above-mentioned crooked loop member from extracting out from the tubulose post.

2. annular mechanism for loose-leaf binder as claimed in claim 1 is characterized in that described locking bar is the locking bar of a monomer, is used for being meshed with the loop member of all encircling.

3. annular mechanism for loose-leaf binder as claimed in claim 2, it is characterized in that, above-mentioned locking bar is slidably mounted on the bottom surface of elongated board, be used for one and the locked position that is received in the crooked loop member free end engagement of tubulose post discharge loop member with one and mobile between the off-position of from the tubulose post, taking out.

4. annular mechanism for loose-leaf binder as claimed in claim 3 is characterized in that, above-mentioned locking bar has the thin slice that can mesh with each free end of crooked loop member, is used for loop member is locked at the tubulose post.

5. annular mechanism for loose-leaf binder as claimed in claim 4 is characterized in that, above-mentioned loop member has the groove near their free end location respectively, and these thin slices are received in these grooves in the closed condition of ring.

6. annular mechanism for loose-leaf binder as claimed in claim 5 is characterized in that, each crooked loop member all has groove at each free end opposite side of loop member, so that two free ends of above-mentioned crooked loop member can be inserted into a pair of tubulose post turningly.

7. annular mechanism for loose-leaf binder as claimed in claim 3 is characterized in that above-mentioned locking bar is biased to locked position.

8. annular mechanism for loose-leaf binder as claimed in claim 7 is characterized in that, also comprises a spring, and the two ends of this spring link with locking bar and elongated board respectively, is used for locking bar towards the locked position bias voltage.

9. as claim 3 or 7 described annular mechanism for loose-leaf binder, it is characterized in that locking bar comprises that one is positioned at the finger grip of locking bar one end, be used to promote locking bar and move, thereby in the tubulose post, lock or the release loop member with respect to elongated board.

10. annular mechanism for loose-leaf binder as claimed in claim 3, it is characterized in that the free end of each crooked loop member generally comprises wedge-like portion, be used for matching with locking bar, be positioned on the above-mentioned locked position at locking bar, when loop member is inserted in the tubulose post, move locking bar so that locking.

11. annular mechanism for loose-leaf binder as claimed in claim 9 is characterized in that, above-mentioned locking bar has the protruding block of close finger grip, this block in above-mentioned off-position by backstop on the outward flange of the end of above-mentioned elongated board.

12. a file that has annular mechanism for loose-leaf binder, this loose-leaf binder mechanism are installed on the front cover of this document folder, this mechanism comprises:

13. file as claimed in claim 12 is characterized in that, described locking bar is the locking bar of a monomer, is used for being meshed with the loop member of all encircling.

14. file as claimed in claim 13 is characterized in that, above-mentioned locking bar is slidingly mounted on the bottom surface of elongated board, is used for moving between a locked position and an off-position.

15. file as claimed in claim 14 is characterized in that, above-mentioned locking bar has the thin slice that can mesh with each free end of crooked loop member, is used for loop member is locked at the tubulose post.

16. file as claimed in claim 15 is characterized in that, above-mentioned loop member has the groove near their free end location respectively, and these thin slices are received in these grooves in the closed condition of ring.

17. file as claimed in claim 16 is characterized in that, each crooked loop member has groove at each free end opposite side of loop member.

18. file as claimed in claim 14 is characterized in that, above-mentioned locking bar is biased to locked position.

19. file as claimed in claim 18 is characterized in that, also comprises a spring, this spring and locking bar and elongated board link, and are used for locking bar towards the locked position bias voltage.

20. file as claimed in claim 14 is characterized in that, locking bar comprises a finger handle, is used for moving locking bar with respect to elongated board, thereby locks or the release loop member in the tubulose post.

21. file as claimed in claim 14 is characterized in that, the free end of each crooked loop member generally comprises wedge-like portion, is used for and the locking bar engagement, is positioned on the above-mentioned locked position at locking bar, moves locking bar so that locking when loop member is inserted in the tubulose post.

22. file as claimed in claim 20 is characterized in that, above-mentioned locking bar has the protruding block of close finger grip, this block in above-mentioned off-position by backstop on the outward flange of the end of above-mentioned elongated board.