WO2008086667A1

WO2008086667A1 - A lever folder mechanism

Info

Publication number: WO2008086667A1
Application number: PCT/CN2007/001101
Authority: WO
Inventors: Shanjun Lee; Chunyuen To
Original assignee: World Wide Stationery Manufacturing Company Limited
Priority date: 2007-01-16
Filing date: 2007-04-04
Publication date: 2008-07-24
Also published as: TW200838718A; CN101224682A

Abstract

A lever folder mechanism comprises: a base (101); two first arched sections (103) secured to the base and spaced apart from each other in parallel; a ring element (105) mounted moveably on the base including two second arched sections, wherein the first and second sections form closed rings; an elastic element (125), one end of which is mounted on the base, and the other end is pressed against the ring element; a male portion (109) ejected from the base; a lever (117) mounted pivotally on the male portion. The mechanism further comprises at least one fixing device (127) for fixing the mechanism to a cover. The mechanism in the invention could be conveniently packaged, transported and stocked.

Description

LEVER Clamp Mechanism TECHNICAL FIELD - The present 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. Chinese Patent No. 01124645.6 of the present applicant discloses a lever clamp mechanism. Such a lever clamp mechanism is usually made by fixing a rivet to a cover to form a lever clamp. Typically, the lever clamp mechanism is secured to the cover by passing the rivet through the opening in the cover and the lever clamp mechanism. The tail of each rivet is then deformed (e.g., by stamping) to secure the lever clamp mechanism. Once assembled, the lever clamps are packaged and shipped to a distributor, retailer or directly to the end user.

A disadvantage of such a lever clamp is that after assembly, a large gap exists between the lever clamp mechanism and the cover of each of the lever clamps, so that a large amount of space is not used when shipping and storing the plurality of lever clamps. Therefore, the number of lever clamps in each package is greatly limited. As a result, the efficiency of packaging and shipping existing lever clamps is not high, resulting in considerable shipping and handling costs. Moreover, even a limited number of lever clamps occupy a considerable amount of storage space or retail display space.

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 can be easily leveraged The cover of the clip is assembled so that it can be shipped separately from the cover of the lever clamp.

According to the present invention, there is provided a lever clamp mechanism, the lever clamp mechanism comprising: a 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

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 lever clamp mechanism further comprises at least one mounting device for mounting the lever clamp mechanism to the cover.

The lever clamp mechanism according to the present invention can be packaged, shipped, stored and/or sold without the lever clamp mechanism being securely mounted to the cover, and thus more effective than a lever clamp having a mounted lever clamp mechanism. A more economical way to be packaged, shipped and stored. 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 bottom side stand of a lever clamp mechanism in a closed state according to a first embodiment of the present invention; Body map

Figure 3 is a perspective view of a lever clamp mechanism according to a first embodiment of the present invention, showing the mounting device in an exploded manner;

Figure 4 is a partially cutaway front elevational view of the lever mechanism of the first embodiment of the present invention; Figure 5 is an enlarged plan view of a partially cutaway portion of Figure 4;

Figure 6 is a plan view of a lever clamp mechanism according to a first embodiment of the present invention, the ring portion being partially removed to show the mounting device;

Figure 7 is an enlarged view of the circled portion of Figure 6;

Figure 8 is a perspective view of a mounting device in accordance with a first embodiment of the present invention;

Figure 9 is a bottom perspective view of the mounting device in accordance with the first embodiment of the present invention;

Figure 10 is an exploded perspective view of a mounting device in accordance with a first embodiment of the present invention; Figure 11 is a plan view of a mounting device in accordance with a first embodiment of the present invention;

Figure 12 is a cross-sectional view along line 12-12 of Figure 11;

Figure 13A is a partial cross-sectional view showing, in an exploded manner, a state before the mounting device is fixed to the substrate and before the lever clamp mechanism is mounted on the cover;

Figure 13B is a schematic view similar to Figure 13A showing the lever clamp mechanism being mounted to the cover;

Figure 13C is a schematic view similar to Figure 13B showing the lever clamp mechanism has been mounted to the cover;

Figure 14 is a perspective view of the lever clamp mechanism in a closed state according to a second embodiment of the present invention;

Figure 15 is a perspective view of a lever mechanism according to a second embodiment of the present invention, in an exploded manner The installation device is shown;

Figure 16 is a plan view showing the lever clamp mechanism in a closed state according to a second embodiment of the present invention, the ring portion being partially removed to show the mounting device;

Figure 17 is a partial cross-sectional view along line 17-17 of Figure 16;

Figure 18 is an enlarged view of the circled portion of Figure 16;

Figure 19 is a perspective view of the lever clamp mechanism in a closed state according to a third embodiment of the present invention;

Figure 20 is a perspective view of a lever mechanism according to a fourth embodiment of the present invention, showing the mounting device in an exploded manner;

Figure 21 is a perspective view of a lever mechanism according to a fifth embodiment of the present invention, showing the mounting device in an exploded manner. detailed description

1-12 show a lever clamp mechanism 100 in accordance with a first embodiment of the present invention. The lever clamp mechanism 100 according to the present invention includes a substantially flat substrate 101. Two first ring portions 103 which are spaced apart from each other and are parallel are fixedly mounted on one longitudinal side portion of the substrate 101. The two first ring portions 103 extend substantially vertically upward from the substrate 101 and are slightly bent at their free ends. To form a curved portion. 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. Ring member 105 The two second ring portions 105a 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 both ends of the substrate mounting ring member 105, and rolling the two portions of the substrate portion which are cut or stamped upward and outward.

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. One or more holes 115 are also formed in the substrate.

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 117 includes a lever body 117b, a lever head portion 117c that is bent and extended from one end of the lever body, and an operation end 117a at the other end of the lever body. The roller 119 is attached to the joint portion of the lever body 117b and the lever head 117c by the pin shaft 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. A lever 117 equipped with a roller 119 is rotatably attached to the boss 109 at a free end of the lever head 117c by a fixing member 123 such as a rivet, so that the stick 119 is substantially bendable at the ring member 105 when the lever 117 is rotated. The part 105c moves up. A substantially arcuately curved spring piece 125-end is inserted into the elongated slot 113 on the substrate 101 to remain on the substrate 101, the other end of which is placed under the curved portion 105c of the ring member 105 and resiliently 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.

In the closed state of the lever clamp mechanism shown in FIG. 1, by the grip lever operating end 117a moving away from the substrate rotating lever 117, the lever can be rotated counterclockwise from the fixing member 123 from the state shown in FIG. 1, resulting in mounting on the lever. The roller 119 is moved away from the protrusion 105d in the direction toward the lever operating end 117a, and the pressing of the connecting portion 105b is released, so that the connecting portion 105b is moved away from the substrate 101 by the upward thrust of the spring piece 125, and the ring is driven. The two ring portions 105a of the member 105 are moved away from the two fixed ring portions 103 that are fixedly mounted to form an open loop to open the lever clamp mechanism for accessing the loose-leaf paper. In the process of rotating the lever 117 upward away from the substrate, the lever comes into contact with the blocking portion 109a protruding from the boss 109, restricting the lever from rotating further upward, thereby preventing the lever operating end 117a from entering the first ring portion 103 and the second ring portion The gap between 105a hinders access to the sheet. In the open state of the lever clamp mechanism, the lever 117 is rotated downward toward the substrate by the operation end 117a of the grip lever 117, causing the roller 119 mounted on the lever to be The curved portion 105c of the ring member 105 is moved to the protruding portion 105d in a direction away from the lever operating end 117a, and the connecting portion 105b is pressed against the substrate 101 against the upward thrust of the spring piece 125, thereby driving the two of the ring members 105. The ring portion 105a is moved to a position in contact with the two opposing ring portions 103, as shown in Fig. 1, to form a closed loop to hold the loose-leaf paper.

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 (not shown in this embodiment, but shown in Figs. 20 and 21) for accommodating the roller 119 when the lever clamp mechanism is opened. In order to facilitate the processing, a concave portion may be formed symmetrically on both sides of the protruding portion 105d.

The lever clamp mechanism 100 according to the present invention further includes at least one mounting device 127 for mounting the lever clamp mechanism to the cover. In the first embodiment, two mounting means 127 respectively provided on the protruding portions 101a at both ends of the substrate 101 are included. Each of the mounting devices 127 includes a stopper 129 and a fixture 131 for fixing the stopper 129, respectively. Each of the stops 129 has a central opening 129a, and a plurality of projections 129b extending generally about the central opening 129a and projecting to the central opening. Five projections 129b are shown in the illustrated construction, but more or fewer projections may be employed.

The fixture 131 is tubular in shape and has two open ends. At the first end, the fixture 131 includes a deformable lip 131a for mounting the fixture 131 into the aperture 115 in the substrate 101. It should be understood that other ways of mounting the fixture 131 to the substrate 101 can be used without departing from the scope of the invention. At the second end, each of the fixtures 131 includes a circular flange 131b that forms an opening 131c at the second end. Preferably, a shoulder 131d is further formed on the tubular body of the fixing device 131, and when the fixing device 131 is mounted on the substrate 101, the protrusion of the substrate 101 is caused. The bottom surface of the portion 101a cooperates with the shoulder 131d to ensure that the bottom surface of the circular flange 131b of the fixture 131 after assembly is substantially at the same level as the bottom surface of the substrate 101, as shown in FIG.

When assembled, each of the stoppers 129 is received in the opening 131c of the fixing device 131, and is fixed to the circular flange 131b through the curved outer edge of the circular flange 131b. Preferably, the projection 129b of the stopper 129 is inclined such that when the stopper 129 is fixed to the fixing device 131, the projection 129b extends inward toward the lip 131a of the fixing device 131, as shown in FIG. 5 and 12 is shown.

As shown in Figures 13A-13C, each fastener 133 passes through a hole 135a in the cover 135 and a corresponding opening 129a in the stop 129 to secure the lever clamp mechanism 100 to the cover 135. Each fastener 133 includes a shaft 133b having a free end 133a, and a head 133c mounted to the other end of the shaft. The free end 133a tapers to make it easier for the shaft 133b of the fastener 133 to pass through the aperture 135a in the cover 135 and the opening 129a in the stop 129. The projection 129b of the stopper 129 is elastically deformable, and the width W1 of the opening 129a defined by the projection 129b on each stopper is smaller than the width W2 of the shaft 133b of the fastener 133 as shown in Fig. 13A. When the fastener 133 is pushed through the opening 129a in the stopper 129, as shown in Fig. 13B, the projection 129b is deformed (i.e., axially offset toward the lip 131a of the fixing device 131), thereby making it wider. The shaft 133b passes through the opening. When the fastener 133 is pushed through the opening 129a on the stopper 129, the free end of the projection 129b engages with and slides along the shaft 133b of the fastener 133. Once inserted, the free end of the projection 129b remains in contact with the surface of the shaft 133b and prevents the fastener 133 from being removed from the stop 129. The angle of inclination of the projection 129b helps guide the fastener 133 through the opening 129a, aids in the deformation of the projection, and also causes the free end of the projection to grip the surface of the shaft 133b of the fastener. The fastener is clamped to the free end of the projection 129b on the surface of the shaft 133b to prevent removal. Tends from the fixture 131 and the stop The movement of the 129 removal fastener 133 causes the projection 129b to move to a planar state. This reduces the size of the opening 129a and causes the projection 129b to abut the fastener 133 to prevent it from being removed. When the fasteners 133 are used to secure the lever clamp mechanism to the cover 135, each fastener head 133c engages the outer surface of the cover 135, as shown in Figure 13C.

The lever clamp of the present invention can be assembled easily and manually. The opening 129a on the stopper 129 held by the fixing device 131 is aligned with the 135a on the cover 135. Next, each fastener 133 is inserted into the hole 135a of the cover 135 and the opening 129a of the corresponding stopper 129 such that the projection 12% of the stopper grips the shaft 133b of the fastener, thereby the lever clamp mechanism 100. Fixed to the cover.

Accordingly, the lever clamp 100 of the present invention can be packaged, shipped, stored and/or sold without the lever clamp mechanism 100 being securely mounted to the cover 135. For example, multiple covers 135 can be packaged and shipped together such that less space is wasted between adjacent covers. This can be accomplished by laying the cover 135 flat such that the front panel, back panel and ridges of the cover are generally in the same plane and the cover 135 is placed one on top of the other. The lever clamp mechanism 100 and the fasteners 133 can be packaged in the same container as the cover 135 or separately. In either case, the lever clamp mechanism 100 can be arranged to minimize wasted space. One possible packaging for the lever clamp mechanism 100 is to assemble them in an alternating manner such that the loop of one of the lever clamp mechanisms is between the loops of adjacent lever clamp mechanisms. As a result, the separate cover 135 and lever clamp mechanism 100 can be packaged, shipped, and stored in a more efficient and economical manner than a lever clamp having a mounted lever clamp mechanism.

The lever clamp mechanism 100 can be mounted to the cover 135 by a retailer, for example, prior to shipment to the user or prior to presentation. It should be understood that the user may wish to keep the lever clamp mechanism 100 separate from the cover 135 in order to take advantage of the savings in storage space. Therefore, the user can It is then the person who mounts the lever clamp mechanism 100 to the cover 135. Thus, it should be understood that the lever clamp mechanism and cover of the present invention can be combined at any different time to form a lever clamp. The example of mounting the lever clamp mechanism to the cover by a retailer or user is merely exemplary, as will be appreciated, others include a lever clamp manufacturer that can assemble the lever clamp. It should be understood that the lever clamp mechanism can be mounted to the cover using an automated process or a manual process as described herein.

14-18 show 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 is substantially similar to the lever clamp mechanism 100 according to the first embodiment of the present invention except that the fixing means 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.

Each of the mounting devices 227 includes a stopper 229 and a fixing device 231 for fixing the stopper 229, respectively. The stopper 229 is the same as the stopper 129 in the first embodiment. The fixture 231 includes a plurality of upwardly bent portions 231a formed at intervals along the circumference of the hole 215 on the substrate 201 and a plurality of support portions 231b between the adjacent bent portions 231a. The bent portion 231a and the support portion 231b are integrally formed on the substrate 201 by cutting and bending a part of the substrate. At the time of assembly, the stopper 229 is placed on the support portion 231b around the hole 215, and the stopper 229 is firmly fixed to the substrate 201 by pressing the bent portion 231a.

Figure 19 shows 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 number of fixing devices is 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. The parts are denoted by the same reference numerals plus 100, and the description of the same components is omitted. The lever clamp mechanism 300 according to the third embodiment of the present invention includes four mounting devices 327. It should be understood that the number of mounting devices may be any number, and the mounting device may be disposed at any position on the substrate as needed.

Figure 20 shows 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 for the shape of the lever and the manner of operation. The same or similar components of the lever clamp mechanism 400 according to the fourth embodiment of the present invention and the lever clamp mechanism 100 of the first embodiment of the present invention are denoted by the same reference numerals plus 300, and the description of the same components is omitted.

The lever 417 of the lever clamp mechanism 400 of the fourth embodiment includes a lever body 417b, a lever head portion 417c bent from one end of the lever body, and an operation end 417a at the other end of the lever body. Roller 419 is mounted to the free end of lever head 417c by pin 421. A lever 417 equipped with a roller 419 is rotatably attached to the boss 409 at a joint portion of the lever body 417b and the lever head 417c via a fixing member 423. In operation, the lever clamp mechanism 400 can be opened by rotating the lever 417 toward the base plate 401, and the lever clamp mechanism 400 can be closed by rotating the lever 417 away from the base plate 401.

Figure 21 shows 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 same components are omitted. Description.

The lever 517 of the lever clamp mechanism 500 according to the fifth embodiment of the present invention has two operation ends for the user to grasp, that is, the first operation end 517a and the second operation end 517a'. The roller 519 is mounted on the lever body 517b at a position between the first operating end 517a and the second operating end 517a. The other position between the first operating end 517a and the second operating end 517a of the lever 517 is mounted to the boss 509 via the fixing member 523. One or both of the first operating end 517a and the second operating end 517a' may extend beyond the corresponding closed loop formed by the first loop portion 503 and the second loop portion 505a to facilitate gripping by the user. The user can open or close the lever clamp mechanism by grasping either of the operating ends or simultaneously grasping the two operating ends. Preferably, at least one blocking portion 517d protruding toward the boss portion 509 is provided on the lever body 517b to control the range of rotation of the lever when the lever mechanism is slammed and closed.

In all of the above embodiments, the mounting device includes a separate stop, but it should be understood that the stop member may be integrally formed with the base plate, omitting the securing means. That is, there are a plurality of protrusions on the substrate that extend substantially around the holes in the substrate and protrude to the central opening. In this case, there are special requirements for the rigidity and elasticity of the material used for the substrate, which may result in an increase in overall cost.

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

What is claimed is: 1. A lever clamp mechanism, comprising: a flat substrate; two first ring portions spaced apart from each other and fixedly mounted on the substrate, and

a ring member movably mounted on the substrate, the ring members including spaced apart from each other and parallel

Two second ring portions, 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 portion respectively opposite to each other when the lever clamp mechanism is closed The ring portion may form a closed loop; an elastic member that is mounted on the substrate at one end and abuts against the ring member at the other end for pushing the ring member away from the substrate by elastic force; protruding upward from the substrate a boss having abutting portion, the lever being rotatably mounted to the boss such that the abutting portion is in contact with the ring member; wherein the lever mechanism is further At least one mounting device for mounting the lever clamp mechanism to the cover is included.

2. The lever clamp mechanism of claim 1 wherein said mounting means comprises a stop.

3. The lever arch mechanism of claim 2, wherein the stop member includes an opening and a plurality of protrusions extending into the opening.

4. The lever clamp mechanism according to claim 3, wherein the protruding portion is inclined.

The lever clamp mechanism according to claim 3, wherein the protruding portion has elasticity.

The lever clamp mechanism according to any one of claims 2 to 5, wherein the stopper is integrally formed on the substrate.

The lever clamp mechanism according to any one of claims 2 to 5, wherein the lever clamp mechanism further comprises fixing means, and the stopper is fixed to the base plate by the fixing means.

8. The lever arch mechanism of claim 7, wherein the securing means is tubular in shape and has two open ends.

9. The lever clamp mechanism according to claim 8, wherein a first end of the fixing device is mounted in a hole in the substrate, and a second end of the fixing device is used to fix the stopper .

10. The lever clamp mechanism of claim 9 wherein said first end includes a deformable lip.

11. A lever clamp mechanism according to claim 9 wherein said second end includes a circular flange and the flange defines an opening at the second end.

12. A lever clamp mechanism according to claim 11 wherein the stop member is received in the opening and is bent to the circular flange by a curved flange outer edge.

The lever clamp mechanism according to claim 8, wherein the tubular body of the fixing device is further formed with a shoulder portion that engages with a bottom surface of the protruding portion of the substrate.

The lever mechanism according to claim 7, wherein the fixing means includes a plurality of bent portions formed at intervals along a circumference of the hole in the substrate, and an adjacent bent portion Multiple support between.

The lever mechanism according to claim 14, wherein the bent portion and the support portion are integrally formed on the substrate by cutting and bending.

The lever clamp mechanism according to claim 14, wherein the stopper is firmly fixed to the substrate by pressing the bent portion.

17. The lever clamp mechanism of claim 1 further comprising a fastener for mounting the lever clamp mechanism to the cover.

18. The lever clamp mechanism of claim 3, further comprising a fastener for mounting the lever clamp mechanism to the cover.

19. The lever clamp mechanism of claim 18, wherein the fastener comprises a shaft having a free end and a head mounted to the other end of the shaft.

20. The lever clamp mechanism of claim 19, wherein the free end tapers.

21. The lever arch mechanism of claim 18, wherein the width of the opening defined by the projection on the stop is less than the width of the shaft of the fastener.

The lever clamp mechanism according to claim 1, wherein the lever is disposed to open the lever clamp mechanism by rotating toward the substrate to close the lever clamp mechanism by rotating away from the substrate.

The lever clamp mechanism according to claim 1, wherein the lever is disposed to open the lever clamp mechanism by rotating toward the substrate, and to close the lever clamp mechanism by rotating away from the substrate.

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

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

The lever 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 lever mechanism according to claim 26, wherein the intermediate portion of the curved portion protrudes upward to form a projection, and the abutting portion closes the lever clamp mechanism when pressed against the projection.

The lever mechanism according to claim 27, wherein a concave portion is formed in a curved portion on the side of the projection on which the abutment portion is moved when the lever clamp mechanism is opened.

The lever mechanism according to claim 28, wherein a concave portion on the curved portion is formed on both sides of the protruding portion.

A lever clamp mechanism according to claim 1, further comprising a blocking portion for restricting a range of rotation of said lever.