WO2008089606A1

WO2008089606A1 - A lever clip mechanism

Info

Publication number: WO2008089606A1
Application number: PCT/CN2007/001102
Authority: WO
Inventors: Chunyuen To; Hungyu Cheng; Xitao Deng
Original assignee: Leco Stationery Manufacturing Company Limited
Priority date: 2007-01-19
Filing date: 2007-04-04
Publication date: 2008-07-31
Also published as: CN101224685A

Abstract

A lever clip mechanism, which includes a flat base plate, a couple of first ring fixed on the base plate which are spaced apart and parallel to each other and a ring element fixed movably on the base plate. The ring element includes a couple of second rings, and they are also spaced apart and parallel to each other. Said first ring and said second ring are opposite, so when the lever clip mechanism is closed, the first ring and the second ring form a closed ring. One end of an elastic element is fixed on the base plate and the other end is against the ring element. A protrusive element protrudes up from the base plate. The lever is provided with an opposition section. Said lever is fixed rotatablely on said protrusive element, so said opposition section contacts the ring element. Said elastic element is higher than the lowest section of said ring element. When the lever clip mechanism is closed, the elastic element doesn't contact wrappage, thus the ring of lever clip mechanism can be fully closed and the wappage will not be damaged.

Description

Lever clamp mechanism

The invention relates to a lever clamp mechanism. Background technique

The lever clamp mechanism is a stationery widely used to store sheets such as loose-leaf paper. A prior art lever clamp mechanism includes a generally flat substrate; two first ring portions spaced apart from each other and fixedly mounted at one end thereof to one longitudinal side of the substrate, the two first ring portions being substantially perpendicular from the substrate Extending upwardly and slightly curved at the other end to form a curved portion; two second ring portions spaced apart from each other and movably mounted at one end thereof to the other longitudinal side of the substrate, two second ring portions from the substrate Extending generally vertically upwardly, and forming an additional bend at the other end thereof to cooperate with the curved portion of the other end of the two first loop portions to form a closed loop when the lever clamp mechanism is closed, the two second loop portions One end of the substrate is integrally connected to each other by a connecting portion such that the two second ring portions move together, the connecting portion forming a substantially U-shaped bent portion bent toward the center of the substrate at a middle portion thereof; And bending the cut portion upward to form a substantially upright protrusion at the center of the substrate; one side of the substrate is mounted on the other longitudinal side of the adjacent substrate a spring piece elastically abutting the lower side of the substantially u-shaped bent portion of the connecting portion, the spring piece for pushing the connecting portion away from the substrate plane, thereby causing the two The second ring portion moves together away from the two first ring portions that are fixedly mounted to open the lever clamp mechanism; and a lever rotatably mounted to the boss portion to which the lever is mounted The end of the part has a roller. Pass Pressing and rotating the lever downwardly can cause the roller to move in a direction away from the handle portion of the lever against the upward thrust of the spring piece to a position where the connecting portion is pressed against the substrate, thereby driving the two The second ring portions are moved together to a position in contact with the two first ring portions that are fixedly mounted to form a closed loop; by rotating the lever upward away from the substrate, the rollers can be moved in a direction toward the lever handle portion to release the pair a position at which the connecting portion is pressed, so that the connecting portion moves away from the substrate under the upward thrust of the spring piece, causing the two second ring portions to move together away from the two first ring portions that are fixedly mounted , forming an open loop to open the lever clamp mechanism.

The lever clamp mechanism is usually mounted on a sheet-like article such as a cover of a folder to hold a document or a sheet. In this prior art lever clamp mechanism, the spring tabs generally abut the lowest position on the underside of the ring member. When the roller is pressed against the ring member to close the lever clamp mechanism, the spring piece at the lowest position on the lower side of the ring member may come into contact with the cover, on the one hand hindering the pressing of the ring member so that the ring portion of the lever clamp mechanism cannot be sufficiently closed. On the other hand, a spring piece that comes into contact with the cover may cause the cover to break.

Therefore, it is necessary to improve the prior art lever clamp mechanism. Summary of the invention

The present invention has been made in view of the problems of the prior art lever clamp mechanism described above. Accordingly, it is an object of the present invention to provide a lever clamp mechanism that enables the loop portion of the lever clamp mechanism to be sufficiently closed.

Another object of the present invention is to provide a lever clamp mechanism that can avoid causing breakage of the cover. According to the present invention, there is provided a lever clamp mechanism, the lever clamp mechanism comprising: a flat substrate;

Two first spaced apart and parallel first ring portions fixedly mounted on the substrate, and a ring member movably mounted on the substrate, the ring members including two spaced apart and parallel to each other a second ring portion, the two first ring portions and the two second ring portions are respectively disposed opposite to each other, such that the first ring portion and the second ring portion respectively facing each other when the lever clamp mechanism is closed may be Forming a closed loop;

An elastic member attached to the substrate at one end and abutting against the ring member at the other end thereof for pushing the ring member away from the substrate by elastic force;

a raised portion that protrudes upward from the substrate;

a lever having an abutment portion rotatably mounted to the boss portion such that the abutment portion is in contact with the ring member;

Wherein the portion of the elastic member that abuts against the ring member is higher than the lowest portion of the ring member.

In the lever clamp mechanism according to the present invention, since the elastic member portion abutting against the ring member is higher than the lowest portion of the ring member, when the lever clamp mechanism is closed, the elastic member does not come into contact with the cover, so that the ring portion of the lever clamp mechanism is sufficient Closing the ground will not cause the cover to break.

DRAWINGS

1 is a perspective view of a lever clamp mechanism in a closed state according to a first embodiment of the present invention; FIG. 2 is a perspective view of the lever clamp mechanism in an open state according to a first embodiment of the present invention; FIG. 3 is a lever clamp mechanism of FIG. Bottom side perspective view;

Figure 4 is a cross-sectional view along the longitudinal axis of the lever clamp mechanism of Figure 1; Figure 5 is a perspective view of the lever clamp mechanism in a closed state according to a second embodiment of the present invention; Figure 6 is a bottom perspective view of the lever clamp mechanism in an open state according to a second embodiment of the present invention;

Figure 7 is a cross-sectional view along the longitudinal axis of the lever clamp mechanism of Figure 5;

Figure 8 is a bottom perspective view of a portion of the lever clamp mechanism corresponding to Figure 7; Figure 9 is a perspective view of the lever clamp mechanism in a closed state according to a third embodiment of the present invention; Figure 10 is a third embodiment of the present invention a perspective view of the lever clamp mechanism in an open state;

Figure 11 is a perspective view of the lever clamp mechanism in a closed state according to a fourth embodiment of the present invention;

Figure 12 is a perspective view of the lever clamp mechanism in an open state according to a fourth embodiment of the present invention;

Figure 13 is a perspective view of the lever clamp mechanism in a closed state according to a fifth embodiment of the present invention;

Figure 14 is a perspective view showing the lever clamp mechanism in an open state according to a fifth embodiment of the present invention. detailed description

Figures 1-4 show a lever clamp mechanism 100 in accordance with a first embodiment of the present invention. The lever clamp mechanism 100 according to the first embodiment of the present invention includes a substantially flat substrate 101. Two mutually spaced and parallel first ring portions 103 are fixedly mounted on one longitudinal side of the substrate 101, the two first ring portions 103 extending substantially vertically upward from the substrate 101 and slightly at their free ends Bending to form a bend. A ring member 105 is movably mounted on the other longitudinal side portion of the substrate 101. The ring member 105 includes two second ring portions 105a spaced apart from each other and parallel, and a connecting portion 105b that connects the two second ring portions 105a in one body. Each of the second ring portions 105a is formed with a bent portion at its free end, respectively, such that the two second ring portions 105a of the ring member 105 can be mated with the corresponding opposing first ring portions 103 fixedly mounted to the substrate 101. Close the loop. The two second ring portions 105a of the ring member 105 are integrally connected to each other at their other ends close to the substrate via the connecting portion 105b. The connecting portion 105b is bent substantially horizontally toward the center of the substrate at the middle portion thereof to form a substantially U-shaped bent portion 105c, and the intermediate portion of the curved portion 105c is slightly protruded upward to form the protruding portion 105d. The first ring portion 103 and the ring member 105 each have a substantially circular or elliptical cross section and are made of a suitable material such as steel. The ring member 105 is movably mounted to the substrate 101 by cutting or stamping at the both ends of the substrate mounting ring member 105, and the two rolled portions 107 formed by winding the cut or stamped substrate portions up and out.

The portion of the substrate that is cut or stamped is bent substantially upwardly from the substrate in the vicinity of the longitudinal side of the substrate mounting ring member 105, thereby forming a substantially upright projection 109 at the center of the substrate 101. A slit 111 is formed on the substrate 101 by bending the convex portion 109 upward. An elongated groove 113 is also formed in the vicinity of the longitudinal side edge of the substrate mounting ring member 105, and the function of the elongated groove 113 will be described below. It is also possible to form one or more holes 115 on the substrate for fixing the lever clamp mechanism to the cover of a folder or a notebook or the like.

The lever clamp mechanism 100 according to the present invention further includes a lever 117 and a roller 119, which is preferably made of plastic. The lever can be substantially flaky. The roller 119 is mounted to the lever by a pin 121. In the assembled lever clamp mechanism 100, the two first ring portions 103 are fixedly mounted on the longitudinal side of the substrate 101 by means of, for example, riveting, welding or other known connection. The ring member 105 movably fixes both ends of the connecting portion 105b of the ring member 105 by the two rolled portions 107, and the intermediate portion of the U-shaped bent portion 105c of each of the connecting portions 105b is substantially located near the convex portion 109, thereby The ring member 105 is movably mounted to the other longitudinal side of the substrate 101 such that the two second ring portions 105a of the ring member 105 are respectively aligned with the two first ring portions 103 that are fixedly mounted. The lever 117 equipped with the roller 119 is rotatably mounted to the boss 109 by a fixing member 123 such as a rivet, so that the roller 119 is substantially movable on the curved portion 105c of the ring member 105 when the lever 117 is rotated. A substantially arcuately curved spring piece 125-end is inserted into the elongated slot 113 on the substrate 101 to be held on the substrate 101, the other end of which is placed under the curved portion 105c of the ring member 105 and elastically abuts The curved portion 105c of the ring member 105 is for urging the curved portion 105c of the ring member 105 upward by the elastic force. Of course, the mounting position of the spring piece 125 is not limited to the illustrated position as long as the spring piece 125 can abut against the lower side of the curved portion 105c. Further, the shape of the spring piece 125 is not limited to the illustrated shape as long as the spring piece 125 can generate an upward thrust against the lower side of the curved portion 105c. A spring wire can also be used instead of the spring piece.

The lever 117 of the lever arch mechanism 100 according to the first embodiment of the present invention is formed with at least one blocking portion 117c projecting toward the side of the boss 109, and the position and size of the blocking portion 117c are set to restrict opening or closing of the lever clamp The range in which the lever operating end 117a rotates when the mechanism is in use. Preferably, as shown in FIGS. 1-4, two protruding blocking portions 117c are formed on the lever 117, and the two blocking portions 117c are disposed and sized to restrict the operation of the lever when opening and closing the lever clamping mechanism, respectively. The extent to which end 117a can rotate. Preferably, the blocking portion 117c is a body topography It is formed on the lever 117.

According to the present invention, when the lever clamp mechanism is moved between the open state and the closed state, the lever operating end 117a is rotated by an angle range of less than or equal to 45°. Further, when the lever clamp mechanism is moved between the open state and the closed state, the horizontal distance that the stick 119 moves on the ring member 105 is not more than 8.5 mm.

In the open state of the lever clamp mechanism shown in FIGS. 2 and 3, by rotating the operating end 117a of the grip lever 117 upward away from the substrate rotation lever 117, the lever can be rotated counterclockwise from the fixing member 123 from the state shown in FIG. The roller 119 attached to the lever is moved to the protruding portion 105d in the direction toward the lever operating end 117a on the curved portion 105c of the ring member 105, and the connecting portion 105b is pressed against the substrate 101 against the upward thrust of the spring piece 125, Thereby, the two ring portions 105a of the ring member 105 are moved to a position in contact with the two opposite ring portions 103, as shown in Fig. 1, to form a closed loop to hold the loose-leaf paper. In the process of rotating the lever 117 upward away from the substrate, the blocking portion 117c remote from the lever operating end 117a comes into contact with the boss 109, restricting the lever operating end 117a from rotating further toward the ring portion 105a and the ring portion 103, thereby avoiding the lever The operating end 117a prevents the user from flipping the sheet along the loop. When the lever clamp is in the closed state, the distance between the lever operating end 117a and the ring portion in the vertical direction is at least 8 mm. In contrast, in the closed state of the lever clamp mechanism shown in Fig. 1, by rotating the lever 117 downward toward the substrate by the grip lever operating end 117a, the lever can be rotated clockwise from the fixing member 123 from the state shown in Fig. 1. The roller 119 attached to the lever is moved from the projection 105d to the recess 105e in a direction away from the lever operating end 117a, and the pressing of the connecting portion 105b is released, thereby causing the upward thrust of the connecting portion 105b at the spring piece 125. Moving away from the substrate 101, the two ring portions 105a of the ring member 105 are moved away from the two oppositely mounted ring portions. W

103. Form a snoring ring to open the lever clamp mechanism to access the loose-leaf paper. In the process of rotating the lever 117 downward toward the substrate, the blocking portion 117c near the lever operating end 117a comes into contact with the boss 109, restricting the lever operating end 117a from rotating further downward, thereby avoiding the lever operating end 117a and the substrate 101 In contact, a space is left between the lever operating end 117a and the substrate 101 to grip the lever operating end 117a. When the lever clamp is in the open state, the distance between the lever operating end 117a and the base plate 101 in the vertical direction is at least 6 mm, so that the user's finger grips the lever operating end. It should be understood that the blocking portion is formed on the boss portion protrudingly toward the lever, and the same effect can be obtained.

According to the present invention, the position of the spring piece 125 against the curved portion 105c of the ring member 105 is higher than the lowest portion of the ring member. This can be achieved by making the width dimension of the leaf spring portion in contact with the curved portion 105c of the ring member 105 smaller than the width of the recess formed below the projection 105d on the ring member 105, thereby allowing the spring piece accommodated in the recess below the projection 105d. The 125 portion is higher in the vertical direction than the lowest portion of the ring member. Preferably, the leaf spring 125 does not exceed the longitudinal vertical plane of the ring member passing the point where the spring leaf contacts the ring member.

In order to make the gap between the opposing ring portions of the open lever clamp mechanism as large as possible in order to access the loose-leaf paper, preferably the projection of the roller 119 is about to move when the lever clamp mechanism is opened on the curved portion 105c of the ring member 105. The 105d-side is formed with a recess 105e for accommodating the roller 119 when the lever clamp mechanism is opened. In this case, the spring piece 125 is asymmetrically disposed with respect to the center of the ring member 105. Herein, the asymmetry means that the shape of the spring piece 125 is asymmetrical with respect to the center of the ring member 105 on the one hand, and the spring piece 125 is offset with respect to the center of the ring member 105 on the other hand. Preferably, the spring piece 125 is disposed on the side of the recess adjacent to the protrusion 105d. More preferably, the spring piece 125 is disposed at a lower portion than the lowest portion of the ring member forming the recess 105e. The portion is close to the side of the protrusion 105d. In the embodiment shown in the drawings, since the center of the ring member 105 and the pivot center (fixing member 123) of the lever 127 are substantially on the same vertical line, the spring piece 125 is actually not opposed to the pivot center of the lever 127. Set symmetrically. However, it is conceivable that the center of the ring member 105 and the pivoting center (fixing member 123) of the lever 127 may not be on the same vertical line, for example, the boss portion 109 is not formed centrally on the substrate 101, or even the boss portion The 109 centering is formed on the substrate 101 but the fixing member 123 is not centrally located on the boss 109, and the spring piece may be disposed symmetrically with respect to the center of the ring member 105, and asymmetrically disposed with respect to the pivot center of the lever 127. Further, the protruding portion 105d may be formed on the ring member 105 without being centered. In order to facilitate the processing, the concave portion 105e may be formed symmetrically on both sides of the protruding portion 105d. Preferably, the vertical distance between the lowest point of the concave surface of the recess 105e and the highest point of the convex surface of the protrusion 105d is equal to or larger than the diameter of the ring member 105. Preferably, the horizontal distance between the center of the protrusion 105d on the ring member 105 and the center of the recess 105e is not more than 8.5 mm.

In order to facilitate the grip of the user and improve the comfort of the operation, a sheath 117d made of rubber, plastic or other flexible material may be provided on the operating end 117a of the lever. Color jackets of different colors can be used as needed for easy identification. ,

When the lever 117 is operated to close the lever clamp mechanism, the roller 119 presses the ring member 105 against the base plate 101, since the contact position of the end portion of the spring piece with the curved portion of the ring member is higher than the lowest portion of the ring member, the spring piece The end is higher than the bottom surface of the substrate, as shown in Figure 4, and thus does not contact the cover that will be mounted to the lever clamp, avoiding the ring closure and damage to the cover.

Figures 5-8 illustrate a lever clamp mechanism 200 in accordance with a second embodiment of the present invention. The structure of the lever clamp mechanism 200 according to the second embodiment of the present invention and the lever clamp according to the first embodiment of the present invention The mechanism 100 is generally similar except that the shape of the lever is different. The same or similar components of the lever clamp mechanism 200 according to the second embodiment of the present invention to the lever clamp mechanism 100 of the first embodiment of the present invention are denoted by the same reference numerals plus 100, and the description of the same components is omitted.

The lever 217 of the lever arch mechanism 200 according to the second embodiment of the present invention has two operating ends that are graspable by the user, that is, the first operating end 217a and the second operating end 217b. The roller 219 is mounted on the lever 217 at a position between the first operating end 217a and the second operating end 217b. The lever 217 is attached to the boss 209 by a fixing member 223 at another position between the first operating end 217a and the second operating end 217b. One of the first operating end 217a and the second operating end 217b may extend beyond the corresponding closed loop formed by the first ring portion 203 and the second ring portion 205a to facilitate gripping by the user. Preferably, as shown in Fig. 5, both the first operating end 217a and the second operating end 217b extend beyond the corresponding closed loop formed by the first ring portion 203 and the second ring portion 205a. The user can open or close the lever clamp mechanism by grasping either of the operating ends or simultaneously grasping the two operating ends.

Figures 9-10 illustrate a lever clamp mechanism 300 in accordance with a third embodiment of the present invention. The structure of the lever clamp mechanism 300 according to the third embodiment of the present invention is substantially similar to the lever clamp mechanism 200 according to the second embodiment of the present invention except that the stoppers are different. The lever clamp mechanism 300 according to the third embodiment of the present invention is the same as or similar to the lever clamp mechanism 200 of the second embodiment of the present invention, and the same reference numerals are given to 100, and the description of the same components is omitted.

In the lever clamp mechanism 300 according to the third embodiment of the present invention, the blocking portion 317c is protrudedly provided on the boss portion 309, and the opening 317e is formed on the lever 317. When the lever clamp mechanism 300 is assembled, the blocking portion 317c passes through the opening 317e on the lever 317, and the opening 317e is sized such that the blocking portion 317c can allow the lever 317 to rotate about the fixing member 323 within a certain range. That is, when the blocking portion 317c is in contact with one end of the opening 317e, the range in which the lever 317 is rotated when the lever clamp mechanism is closed is limited (as shown in FIG. 9), and when the blocking portion 317c is in contact with the other end of the opening 317e, the lever is restricted. The range in which the lever 317 rotates when the clip mechanism is opened (as shown in Figure 10). As shown in Figures 9 and 10, the opening 317e formed in the lever 317 is preferably an arcuate slot.

It should be understood that the blocking portion forms a lever and it is also possible that the opening is formed on the boss. Further, it is also possible that the lever 317 in this embodiment has only one operating end.

Figures 11-12 illustrate a lever clamp mechanism 400 in accordance with a fourth embodiment of the present invention. The structure of the lever clamp mechanism 400 according to the fourth embodiment of the present invention is substantially similar to the lever clamp mechanism 100 according to the first embodiment of the present invention except that the lever shape and the arrangement of the stopper are different. The lever clamp mechanism 400 according to the fourth embodiment of the present invention is the same as or similar to the lever clamp mechanism 100 of the first embodiment of the present invention, and the same reference numerals are given to 300, and the description of the same components is omitted.

Instead of the sheet lever in the first embodiment, the lever 417 of the lever clamp mechanism 400 of the fourth embodiment is substantially elongated. The lever 417 includes a lever body, a lever head that is bent downward from one end of the lever body, and an operating end 417a at the other end of the lever body. The operating end 417a can also be bent upwardly from the other end of the lever body. Roller 419 is mounted to the free end of the lever head by pin 421. The lever 417 equipped with the roller 419 is rotatably mounted to the boss 409 at a joint portion of the lever body and the lever head by a fixing member 423, so that the roller 419 is substantially movable on the curved portion 405c of the ring member 405. A portion where the lever 417 is rotated on the boss portion 409 is provided with a protruding stopper portion 417c.

When the roller 419 moves from the recess 405e toward the projection 405d to close the lever clamp, the lever The head is in contact with the blocking portion 417c, restricting the lever operating end 417a from rotating further toward the ring portion 405a and the ring portion 403, thereby preventing the lever operating end 417a from interfering with the user flipping the sheet along the ring portion. When the roller 419 moves from the projection 405d toward the recess 405e to open the lever clamp, the lever body comes into contact with the blocking portion 417c, restricting the lever operating end 417a from rotating further downward, thereby preventing the lever operating end 417a from coming into contact with the substrate 401, in the lever A space is left between the operating end 417a and the base plate 401 for grasping the lever operating end. By bending the operating end 417a obliquely upward from the other end of the lever body, the space can be further increased to facilitate gripping the lever operating end.

13-14 show a lever clamp mechanism 500 in accordance with a fifth embodiment of the present invention. The structure of the lever clamp mechanism 500 according to the fifth embodiment of the present invention is substantially similar to the lever clamp mechanism 400 according to the fourth embodiment of the present invention except for the shape of the lever and the manner of operation. The same or similar components of the lever clamp mechanism 500 according to the fifth embodiment of the present invention and the lever clamp mechanism 400 of the fourth embodiment of the present invention are denoted by the same reference numerals plus 100, and the description of the same components is omitted.

The lever 517 of the lever clamp mechanism 500 of the fifth embodiment is substantially elongated. The lever 517 includes a lever body, a lever head that is bent upwardly from one end of the lever body, and an operating end 517a at the other end of the lever body. The operating end 517a can also be bent upwardly from the other end of the lever body. The roller 519 is attached to the joint portion of the lever body and the lever head through the pin 521. A lever 517 equipped with a roller 519 is rotatably mounted to the boss 509 at a free end of the lever head by a fixing member 523 such that the roller 519 is substantially movable on the curved portion 505c of the ring member 505. A portion where the lever 517 is rotated over the boss portion 509 is provided with a protruding stopper portion 517c. Unlike the fourth embodiment, in the open state of the lever clamp mechanism shown in FIG. 14, the lever 517 is rotated downward toward the substrate by the operation end 517a of the grip lever 517, so that the lever can be wound around the fixing member 523 from FIG. The state of the clockwise rotation causes the roller 519 mounted on the lever to move on the curved portion 505c of the ring member 505 in a direction away from the lever operating end 517a to the protrusion 505d, and the connecting portion 505b is overcome against the upward thrust of the spring piece 525. The substrate 501 is pressed against, thereby causing the two ring portions 505a of the ring member 505 to move to a position in contact with the two opposing ring portions 503, as shown in Fig. 13, forming a closed loop to hold the loose-leaf paper. The lever body is in contact with the base 501 during the downward rotation of the lever 517 toward the substrate. Since the operating end 517a extends obliquely upward from the other end of the lever body, it is still convenient for the user to grasp the operating end 517a. If the other end of the lever body does not extend obliquely upwardly, another blocking portion (not shown) may be provided on the other side of the lever head opposite to the blocking portion 517c, and the lever operation is restricted by bringing the lever body into contact with the other blocking portion. The end 517a is further rotated downward, thereby preventing the lever operating end 517a from coming into contact with the substrate 501, leaving a space between the lever operating end 517a and the substrate 501 for grasping the lever operating end 517a. In contrast, in the closed state of the lever clamp mechanism shown in Fig. 13, by the grip lever operating end 117a moving away from the substrate rotation lever 517, the lever can be rotated counterclockwise from the fixing member 523 from the state shown in Fig. 13, resulting in The roller 519 mounted to the lever moves from the projection 505d toward the recess 505e in the direction toward the lever operating end 517a, and releases the pressing of the connecting portion 505b, thereby causing the connecting portion 505b to act under the upward thrust of the spring piece 525. Moving away from the substrate 501, the two ring portions 505a of the entraining ring member 505 are moved away from the two oppositely mounted ring portions 503, forming an open ring to open the lever clamp mechanism for accessing the loose-leaf paper. In the process of rotating the lever 517 upward away from the substrate, the lever body is in contact with the blocking portion 517c, which restricts the lever operating end 117a from rotating further upward, thereby avoiding The lever operation end 517a is prevented from entering the gap between the first ring portion 503 and the second ring portion 505a to hinder access to the sheet. When the lever clamp is in the closed state, the distance between the lever operating end 517a and the base plate 501 in the vertical direction is at least 6 mm, so that the user's finger grasps the lever operating end. When the lever clamp is in the open state, the distance between the lever operating end 517a and the ring portion in the vertical direction is at least 8 mm.

Further, regardless of whether the lever clamp mechanism has one or two operating ends, the maximum distance that the operating end extends beyond the corresponding ring portion is preferably no more than 40 mm.

While the invention has been described in detail herein with reference to the preferred embodiments of the embodiments of the invention . For example, a cam portion may be attached to the end of the lever instead of the roller. Further, it is also possible to provide the projections and the recesses at the opposite ends of the opposite loops to prevent the mating loops from being disengaged. These changes and modifications are intended to fall within the scope of the invention.

Claims

1. A lever clamp mechanism, the lever clamp mechanism comprising:

Flat substrate

Two mutually spaced and parallel first ring portions fixedly mounted on the substrate, and a ring member movably mounted on the substrate, the ring members including two spaced apart from each other and parallel a second ring portion, the two first ring portions and the two second ring portions are respectively disposed opposite to each other such that the first ring portion and the second ring portion respectively facing each other when the lever clamp mechanism is closed may be formed Closed loop

a raised portion that protrudes upward from the substrate;

2. The lever clamp mechanism according to claim 1, wherein the two second ring portions are integrally connected by a connecting portion, and the connecting portion includes a bent portion that is curved toward a center of the substrate, the bending The intermediate portion of the portion protrudes upward to form a protrusion, and the abutment portion closes the lever clamp mechanism when pressed against the protrusion.

3. The lever arch mechanism according to claim 2, wherein a width of the elastic member portion abutting against the ring member is smaller than a width of the recess formed under the protruding portion, and an elastic member portion abutting against the ring member is Accommodated in the recess.

4. The lever arch mechanism of claim 1 wherein the resilient member does not exceed a longitudinally perpendicular surface of the ring member that passes through the point of contact of the resilient member with the ring member.

The lever-clamp mechanism according to claim 2, wherein a concave portion is formed in a curved portion on a side of the projection on which the abutting portion is moved when the lever-clamp mechanism is opened.

The lever mechanism according to claim 2, wherein a concave portion on the curved portion is formed on each of the protrusions.

The lever clamp mechanism according to claim 5, wherein the elastic member is asymmetrically disposed with respect to a center of the ring member.

8. The lever arch mechanism according to claim 7, wherein the elastic member is disposed on a side of the recess adjacent to the protrusion.

The lever clamp mechanism according to claim 8, wherein the elastic member is disposed at a lower portion of the lower portion of the ring member than the portion forming the recess portion.

The lever clamp mechanism according to claim 5, wherein the elastic member is asymmetrically disposed with respect to a pivot center of the lever.

The lever mechanism according to claim 5 or 6, wherein a vertical distance between a lowest point of the concave surface of the recess and a highest point of the convex surface of the protrusion is equal to or greater than The diameter of the ring member.

A lever clamp mechanism according to claim 1, wherein said lever clamp mechanism is provided with a blocking means for restricting a range of rotation of said lever.

13. The lever arch mechanism of claim 1 wherein said lever is in the form of a sheet.

The lever clamp mechanism according to claim 1, wherein the blocking means is at least one blocking portion provided on the lever, and the blocking portion protrudes toward a side of the convex portion, The position and size are set to limit the range of rotation of the lever operating end when the lever clamp mechanism is slammed or closed.

The lever clamp mechanism according to claim 14, wherein the blocking device is at least one blocking portion disposed on the convex portion, and the blocking portion protrudes toward a side of the lever, and the position and size thereof are set to The range of rotation of the lever operating end is limited when the lever clamp mechanism is opened or closed.

16. The lever clamp mechanism according to claim 14, wherein the blocking means includes a blocking portion that is protrudedly disposed on the convex portion, and an opening formed on the lever, the blocking portion passing through The opening.

17. The lever clamp mechanism according to claim 14, wherein the blocking means includes a blocking portion that is protrudedly disposed on the lever, and an opening formed on the convex portion, the blocking portion passing through The opening.

18. A lever clamp mechanism according to claim 16 or 17, wherein the opening is an arcuate slot.

The lever mechanism according to claim 1, wherein the lever has an elongated rod shape.

The lever clamp mechanism according to claim 19, wherein the blocking means is one or two protruding blocking portions provided on the convex portion.

A lever clamp mechanism according to claim 1, wherein said lever has an operating end, and the maximum distance at which the operating end extends beyond the corresponding ring portion is not more than 40 mm.

22. The lever clamp mechanism according to claim 21, wherein the lever is disposed to open the lever clamp mechanism by rotating toward the substrate, by rotating away from the substrate Move to close the lever clamp mechanism.

23. The lever clamp mechanism of claim 21, wherein the lever is configured to open the lever clamp mechanism by rotating away from the substrate by rotating toward the substrate to close the lever clamp mechanism.

24. The lever clamp mechanism of claim 1 wherein said lever has two operating ends.

25. The lever clamp mechanism of claim 24, wherein at least one of the two operating ends extends to a corresponding closed loop formed relative to the first loop portion and the second loop portion

The lever clamp mechanism according to claim 1, wherein the lever rotation range is equal to or smaller than 45 °.

The lever clamp mechanism according to claim 1, wherein when the lever is at a position closest to the substrate, an operating end of the lever is spaced apart from a distance of the substrate in a vertical direction. At least 6mm.

The lever mechanism according to claim 1, wherein when the lever is in a position closest to the ring portion, an operating end of the lever is vertically from the ring portion The separation distance is at least 8 mm.

The lever mechanism according to claim 1, wherein when the lever clamp mechanism is moved between an open state and a closed state, the horizontal distance of the abutting portion on the ring member is not more than 8.5 Mm.

The lever mechanism according to claim 5 or 6, wherein a horizontal distance between a center of the protrusion and a center of the recess is not more than 8.5 mm.

31. The lever clamp mechanism of claim 1 wherein the operating end of the lever is provided with a sheath of flexible material.

32. The lever arch mechanism of claim 31, wherein the jacket is a color jacket.

33. The lever clamp mechanism of claim 1 wherein said resilient member is a spring

A lever clamp mechanism according to claim 1, wherein said elastic member is a spring wire.

35. A lever clamp mechanism, the lever clamp mechanism comprising:

Flat substrate

a raised portion that protrudes upward from the substrate;

Therein, the elastic members are arranged asymmetrically with respect to the center of the ring member.

36. A lever clamp mechanism, the lever clamp mechanism comprising: Flat substrate

a raised portion that protrudes upward from the substrate;

Therein, the elastic member is arranged asymmetrically with respect to the pivot center of the lever.