WO2007068165A1

WO2007068165A1 - A lever file

Info

Publication number: WO2007068165A1
Application number: PCT/CN2006/001499
Authority: WO
Inventors: Chunhai Lin
Original assignee: Leco Stationery Manufacturing Company Limited
Priority date: 2005-12-12
Filing date: 2006-06-29
Publication date: 2007-06-21
Also published as: TW200824927A; WO2007068184A1; TW200804098A

Abstract

A lever file includes a base having an upright side wall and a horizontal bottom wall, a pressing portion and a lever connected to the base. The base, the pressing portion and the lever are pivotably assembled together by a spring so that the lever can pivot around the pivot shaft for the spring on the base. Wherein plural projection walls for pivot shafts can be bent upwards from different places on the bottom wall to form plural cuts each respectively located on a different side of the corresponding projection wall. According to the lever file of this invention, it can decrease or even eliminate the torsional deformation of the base, and the file is convenient to use and can be hung when requiring.

Description

Lever clamp technology

The invention relates to a lever clamp. Background technique

The lever clamp is a stationery widely used for storing sheets and the like. Figures 1-3 show prior art lever clamps. Existing lever clamps typically include a base 1, a compression portion 3 and a lever 5. The base 1 is bent at about 90 degrees to form an upwardly standing side wall 7 and a horizontal bottom wall 9. The pressing portion 3 extends in a strip shape. The lever 5 includes a horizontal top wall 11 and a side wall 13 bent downward at about 90 degrees. On the base bottom wall 9, a plurality of projecting walls 15 which are punched or cut from the side close to the side wall 7 and which are bent upward at about 90 degrees are formed. The base 1, the pressing portion 3 and the lever 5 are movably assembled by means of several pivot shafts 17 and springs 19 supported by the base side wall 7 and the projection wall 15, so that the lever 5 can pivot around the support spring 19. The rotary shaft 17 is rotatably fitted inside the side wall of the base and the lever side wall 13 is in close contact with the inner side of the base side wall. Also formed on the lever side wall 13 is a projection portion 21 which is formed in an arc-shaped downward transition integral with the side wall of the lever, and a hole 23 for receiving the projection portion 21 is formed at a position corresponding to the projection portion 21 on the base side wall 7 .

Since one end of the spring 19 is mounted on the inner side of the lever 5 and the other end is mounted on the pressing portion 3, when the pivot shaft 17 around the support spring 19 rotates the lever 5 in a first direction in which the projection 21 and the hole 23 approach each other At this time, the pressing portion 3 is moved to the base bottom wall 9 as the lever 5 is rotated; when the lever 5 is further rotated against the elastic force of the spring 19, the projection 21 on the side wall 13 of the lever 5 is received at the base side wall 7 The upper hole 23 is fixed therein, and at this time, the pressing portion 3 is also The spring 19 is pressed tightly against the base bottom wall 9 to sandwich a sheet or the like between the pressing portion 3 and the base bottom wall 9. When the lever 5 is pulled by the force in the direction of the pressing portion 3 to disengage the projection 21 from the hole 23, the spring 19 releases the pressing force against the pressing portion 3, and the pressing portion 3 and the bottom wall 9 of the base can be taken out. a sheet of paper or the like; if it is necessary to place more sheets or the like between the pressing portion 3 and the base bottom wall 9, the pivot shaft 17 of the support spring 19 can be rotated in a second direction opposite to the first direction. The lever 5 causes the pressing portion 3 to be lifted from the base bottom wall by the other end of the spring and the pivot shaft.

The projection 21 on the side wall 13 of the lever 5 is received in the hole 23 in the side wall 7 of the base, and the pressing portion 3 is tightly pressed against the base bottom wall 9 by the action of the spring 19, As shown in Fig. 2, since the two arms of the coil spring as the spring 19 are pressed between the top wall 11 of the lever 5 and the pressing portion 3, a reaction force is generated thereto, and the pressing portion 3 passes through another The pivot shaft 17 is coupled to the base 1. The portion of the base bottom wall 9 between the side wall 7 and the projection wall 15 has a plurality of slits due to the formation of the projection wall 15, and the other portion of the projection wall 15 is a continuous portion, thereby making the entire base unbalanced. The reaction force, which results in severe deformation distortion of the base 1 near the end of the spring 19. The gap A of the lever clamp base 1 is shown schematically in Fig. 2 near the end of the spring 19, which will seriously affect the normal use of the lever clamp, especially when the lever clamp is assembled on a sheet material such as a folder cover. This also causes the sheet material to bend and even tear.

Another disadvantage of the prior art lever clamp is that the handle portion 25 of the free end of the top wall 11 of the lever 5 extends in the direction of the pressing portion 3. In the case where the width B of the lever clamp is narrow, during the process of locking the lever clamp, the handle portion 25 of the free end of the top wall 11 of the lever 5 interferes with the paper, affecting the locking of the lever clamp, and is inconvenient to use. Figure 4 shows the prior art lever clamp installed On a sheet material 27 such as a folder cover, the sheet 29 is clamped to the lever clip. As shown in Fig. 4, the handle portion 25 of the free end of the top wall 11 of the lever 5 of the lever clamp interferes with the paper 29, and even if a large amount of paper is caught, even the case where the lever clamp cannot be locked is caused.

In addition, prior art lever clamps have no lugs and are not capable of suspending the lever clamps as needed, limiting the use of the product.

Moreover, prior art lever clamps have a drawback in that the sheets are not easily aligned when more sheets are loaded.

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

The present invention has been made in view of the problems of the prior art lever clamp described above.

Accordingly, it is an object of the present invention to provide a lever clamp which is capable of reducing or even eliminating distortion of the base of the lever clamp.

Another object of the present invention is to provide a lever clamp which eliminates interference between the handle portion of the free end of the top wall of the lever and the paper, thereby facilitating use.

Another object of the present invention is to provide a lever clamp that can be suspended as needed to expand its use.

Another object of the present invention is to provide a lever clamp that allows the sheets to be easily aligned. A lever clamp according to the present invention includes a base portion, a pressing portion, and a lever, the base portion including an upwardly standing side wall and a horizontal bottom wall, the lever being engageable with the base portion, the base portion, the pressing portion, and The levers are movably assembled together by means of a spring such that the lever is rotatably mounted on the base about a pivot axis that supports the spring. Used to support the pivot axis The protruding walls are respectively bent upward from different portions of the bottom wall of the base, such that corresponding plurality of slits formed on the bottom wall of the base by the upwardly bent protrusions are respectively located on different sides of the respective protruding walls. DRAWINGS

Figure 1 is a perspective view of a prior art lever clamped in a locked state;

Figure 2 is a side view of the lever clamp of Figure 1;

Figure 3 is a plan view of the lever clamp of Figure 1;

Figure 4 is a schematic view of the lever clamp of Figure 1 mounted on an article such as a folder; Figure 5 is a side elevational view of the lever clamp in a locked state in accordance with a first embodiment of the present invention; Figure 6 shows the lever of Figure 5 Bottom view of the clip;

Figure 7 shows a top view of the lever clamp of Figure 5;

Figure 8 shows a right side view of the lever clamp of Figure 5;

Figure 9 shows a left side view of the lever clamp of Figure 5;

Figure 10 shows an exploded perspective view of the lever clamp of Figure 5;

Figure 11 shows a top side perspective view of the lever clamp of Figure 5;

Figure 12 is a bottom perspective view of the lever clamp of Figure 5;

Figure 13 is a perspective view showing the lever of Figure 5 in an open state;

Figure 14 is a schematic view of the lever clamp of Figure 5 mounted on an article such as a folder; Figure 15 is a side elevational view of the lever clamp in a locked state in accordance with a second embodiment of the present invention. Figure 16 shows the lever clamp of Figure 15 Bottom view

Figure 17 shows a top view of the lever clamp of Figure 15;

Figure 18 shows a right side view of the lever clamp of Figure 15; Figure 19 shows a left side view of the lever clamp of Figure 15;

Figure 20 shows an exploded perspective view of the lever clamp of Figure 15;

Figure 21 shows a top side perspective view of the lever clamp of Figure 15;

Figure 22 shows a bottom perspective view of the lever clamp of Figure 15;

Figure 23 is a perspective view showing the lever of Figure 15 in an open state;

Figure 24 is a schematic view of the lever clamp of Figure 15 mounted on an article such as a folder; Figure 25 shows an exploded perspective view of the lever clamp according to the third embodiment of the present invention; and Figure 26 shows a fourth embodiment according to the present invention. An exploded perspective view of the lever clamp of the example. detailed description

As shown in Figures 5-13, the lever clamp according to the present invention generally includes a base portion 101, a pressing portion 103, and a lever 105. The base 101 is bent at about 90 degrees to form an upwardly standing side wall 107 and a horizontal bottom wall 109. The pressing portion 103 extends in a strip shape. The lever 105 includes a horizontal top wall 111 and a side wall 113 that is bent about 90 degrees downward.

Four protruding walls 115 bent upward at about 90 degrees are formed on the base bottom wall 109 by punching or cutting and bending upwards, and the number of the protruding walls 115 may be more than four or less than four as needed, usually For at least three. The base 101, the pressing portion 103 and the lever 105 are movably assembled together by means of three pivot shafts 117 and springs 119 supported by the base side walls and the holes in the projection wall 115 such that the lever 105 can surround the support spring 119. The pivot shaft 117 is rotatably fitted inside the base side wall 107, and the lever side wall 113 abuts against the inside of the base side wall 107. Also formed on the lever side wall 113 is a projection portion 121 which is formed in an arc-shaped downward transition integral with the side wall of the lever, and a position corresponding to the protrusion portion 121 on the base side wall 107 is formed for receiving The hole 123 of the protrusion 121. Of course, it is also possible to form a hole in the side wall of the lever and a projection on the side wall of the base.

As can be seen from Fig. 10, the intermediate pivot shaft 117 of the support spring 119 is a straight shaft, and the two pivot shafts 117 directly mounted to the pressing portion 103 are crankshafts. The end of the spring 119 for contact with the lever 105 is straight, and the one end for mounting on the pressing portion 103 is bent outwardly. Since one end of the spring 119 is attached to the inner side of the lever 105, the other end is protruded outwardly on the pressing portion 103, and when the pivot shaft 117 around the support spring 119 is along the first direction in which the protruding portion 121 and the hole 123 are close to each other When the lever 105 is rotated, the pressing portion 103 is moved to the base bottom wall 109 as the lever 105 rotates; when the lever 105 is further rotated against the elastic force of the spring 119, the projection 121 on the side wall 113 of the lever 105 is received at the base The hole 123 in the side wall 107 is fixed therein, and at this time, the pressing portion 103 is also tightly pressed against the base bottom wall 109 by the action of the spring 119, thereby sandwiching the pressing portion 103 and the base portion. A sheet of paper or the like between the bottom walls 109. When the lever 105 is strongly pulled in the direction of the pressing portion 103 to disengage the protruding portion 121 from the hole 123, the spring 119 releases the pressing force against the pressing portion 103, and can be taken out at the pressing portion 103 and the bottom wall 109 of the base. If there is a need to place more sheets or the like between the pressing portion 103 and the base bottom wall 109, the pivot shaft 117 of the support spring 119 can be rotated in a second direction opposite to the first direction. The lever 105 lifts the pressing portion 103 from the base bottom wall through the other end of the spring and the pivot shaft.

Unlike the prior art lever clamps, at least three projection walls 115 for supporting the pivot shaft 117 are respectively stamped or cut from different portions of the base bottom wall 109 and bent upward so that the base wall is bent at the base by bending the projection wall 115 upward. Corresponding plurality of slits 127 formed in 109 are respectively located on different sides of the respective protruding walls 115, as shown in Figures 6, 7, and 10-13. The shape of the slit 127 can be Any suitable shape such as a triangle, a rectangle, a circular arc, or the like. Since the slits 127 are respectively distributed on different sides of the corresponding protrusion wall 115, the reaction force of the spring 119 against the base is relatively evenly distributed over the entire base, which reduces the stress concentration, thereby reducing the deformation degree of the lever clamp. Preferably, the raised wall 115 is bent upward at approximately 90°. The slits 127 may be alternately located on different sides of the projection wall 115, gp, one slit 127 may be located on one side of its corresponding projection wall 115, and the other slit 127 may be located on its corresponding projection wall 115 opposite to the one side. One side. More preferably, the slit 127 corresponding to the projection wall 115 of the pivot shaft 117 for supporting the spring 119 is located on the side of the projection wall 115 facing away from the base side wall 107, and the slits 127 corresponding to the other projection walls 115 are respectively located at the corresponding projection wall 115. Between the base side wall 107 and the base. Moreover, it is also possible to form a slit 129 extending from the slit 127 corresponding to the projection wall 115 of the pivot shaft 117 for supporting the spring 119 to the base side wall 107 to further block the transmission path of the reaction force, and concentrate the reaction force on The protruding wall 115 of the pivot shaft 117 of the support spring 119 and its surroundings, thereby further significantly reducing the distortion of the lever clamp.

Further, the handle portion 125 of the free end of the top wall 111 of the lever 105 of the lever clip according to this embodiment extends outward in the direction of the base side wall 107. Fig. 14 shows that the lever clamp according to this embodiment is mounted on a sheet material 27 such as a folder cover, and the sheet 29 is clamped on the lever clip. As shown in Fig. 14, even in the case where the width B of the lever clamp is narrow, the handle portion 125 at the free end of the top wall 111 of the lever 105 does not interfere with the paper during the locking of the lever clamp, and is convenient to use. Even if there is more paper, there is no possibility that the lever clamp cannot be locked.

15-23 illustrate a lever clamp of a second embodiment of the present invention. The components of the lever clamp of the second embodiment corresponding to the lever clamp of the first embodiment are denoted by the same reference numerals plus "100". Except In addition to the changes described below, it should be understood that the lever clamp of this embodiment is the same as the lever clamp of the first embodiment.

Referring to Figures 15-23, a slit 227 corresponding to the projection wall 215 of the pivot shaft 217 for supporting the spring 219 is located on the side of the projection wall 215 facing away from the base side wall 207, and the slits 227 corresponding to the other projection walls 215 are respectively located at the respective projections. Different sides of the wall 215. For example, when three slits 227 are formed, the slit 227 corresponding to the projection wall 215 of the pivot shaft 217 for supporting the spring 219 is located on the side of the projection wall 215 facing away from the base side wall 207, and the other two slits 227 One is also located on the side of the corresponding raised wall 215 facing away from the base side wall 207, and the other slit is located between the corresponding raised wall 215 and the base side wall 207. Preferably, the slit 227 adjacent to the handle portion 225 of the lever 205 and the slit 227 corresponding to the projection wall 215 of the pivot shaft 217 for supporting the spring 219 are located on the same side of the corresponding projection wall 215.

Further, in the lever clamp of the second embodiment, the lug 231 formed by bending 180° is also formed by punching or cutting the base bottom wall 209, and the hanger 231 is further formed with a hole 233 so that the lever clamp can be suspended as needed. In a suitable location, the use of the product is expanded with little increase in cost. Preferably, the lugs 231 are formed between their corresponding slits 227 located between the projection walls 215 facing away from the side wall 207 of the base.

Figure 25 shows an exploded perspective view of a lever clamp in accordance with a third embodiment of the present invention. The components of the lever clip of the third embodiment corresponding to the lever clamp of the first embodiment are denoted by the same reference numerals plus "200". The lever clamp of this embodiment is substantially identical to the lever clamp of the first embodiment except that an additional raised wall 335 is formed on the base bottom wall 309, and the raised wall 335 is further from the base side wall 307 than the raised wall 315. Thus, when the lever is loaded with a sheet of paper, especially a plurality of sheets, the end of the sheet can be aligned against the other raised wall 335. Further, the protruding wall 335 is preferably two Or more, and two or more additional protruding walls 335 are arranged in alignment along a straight line. Preferably, the additional raised wall 335 is also formed by bending or cutting the base bottom wall 309 and bending upward by 90°. Additional slits 337 formed on the base bottom wall 309 by bending the additional raised walls 335 may be located on the same side or on different sides of the additional raised walls 335.

Figure 26 is an exploded perspective view showing a lever clamp according to a fourth embodiment of the present invention. The components of the lever clamp of the fourth embodiment corresponding to the lever clamp of the second embodiment are denoted by the same reference numerals plus "200". The lever clamp of this embodiment is substantially identical to the lever clamp of the second embodiment except that an additional raised wall 435 is formed on the base bottom wall 409, and the raised wall 435 is further away from the base side wall 407 than the raised wall 415. Thus, when the lever is loaded with a sheet of paper, especially a plurality of sheets, the end of the sheet can be aligned against the additional projection wall 435. Further, the protruding walls 435 are preferably two or more, and two or more additional protruding walls 435 are arranged in line alignment. Preferably, the additional raised wall 435 is also formed by bending or cutting the base bottom wall 409 and bending it upward by 90°. The additional slits 437 formed on the base bottom wall 409 by the bent additional projection walls 435 may be located on the same side or on different sides of the additional projection walls 435.

While the invention has been described in detail herein with reference to the preferred embodiments of the embodiments of the invention They should all fall within the scope of protection of the present invention.

Claims

Rights request

What is claimed is: 1. A lever clamp comprising a base, a pressing portion and a lever, the base comprising an upwardly standing side wall and a horizontal bottom wall, the lever being engageable with the base, the base, the pressing portion and The levers are movably assembled together by means of a spring such that the lever is rotatably mounted on the base about a pivot axis supporting the spring, characterized in that a plurality of protruding walls for supporting the pivot shaft are respectively The upper portion of the bottom wall of the base is bent upwardly so that a corresponding plurality of slits formed on the bottom wall of the base by bending the protrusion wall are respectively located on different sides of the corresponding protrusion wall.

2. A lever clamp according to claim 1 wherein the slits are alternately located on different sides of the respective projection wall.

3. The lever clamp according to claim 1, wherein a slit corresponding to a projection wall for supporting a pivot shaft of the spring is located on a side of the projection wall facing away from a side wall of the base, and corresponding to the other projection wall The slits are respectively located between the respective protruding wall and the base side wall.

4. The lever clamp of claim 3, further comprising a slot extending from the slit corresponding to the projection wall for supporting the pivot shaft of the spring to the side wall of the base.

5. The lever clamp according to claim 1, wherein the slit corresponding to the projection wall of the pivot shaft for supporting the spring is located on a side of the projection wall facing away from the side wall of the base, and the slit corresponding to the other projection wall respectively Located on different sides of the corresponding raised wall.

6. The lever clamp of claim 1 wherein said plurality of raised walls comprise at least three raised walls.

7. The lever clamp of claim 1 wherein said plurality of raised walls comprise The three protruding walls, the slit corresponding to the protruding wall for supporting the pivot shaft of the spring, are located on the side of the protruding wall facing away from the side wall of the base, and one of the other two slits is also located at the base of the corresponding protruding wall away from the base On one side of the side wall, another slit is located between the corresponding protruding wall and the side wall of the base.

The lever clamp according to claim 7, wherein the slit adjacent to the free end of the lever and the slit corresponding to the projection wall for supporting the pivot shaft of the spring are located on the same side of the corresponding projection wall.

9. The lever clamp according to claim 1, wherein the lever includes a horizontal top wall and a downwardly bent side wall, and the lever side wall is formed with a protrusion on the side wall of the base A hole corresponding to the protrusion is formed with a hole for receiving the protrusion.

The lever clamp according to claim 9, wherein the handle portion of the free end of the top wall of the lever extends outward in a direction toward the side wall of the base.

The lever clamp according to claim 1, wherein the lever clamp is further formed with a mounting ear having a hole for suspending the lever clamp.

The lever clamp according to claim 11, wherein the lug is formed by punching or cutting a bottom wall of the base and bending by 180°.

The lever clamp according to claim 11, wherein the lug is formed between adjacent projection walls whose corresponding slits are located on a side away from the side wall of the base.

The lever clamp according to claim 1, wherein the projection wall is integrally bent upwardly with the base bottom wall by punching or cutting the base bottom wall.

The lever clamp according to claim 14, wherein the projection wall is bent upward at 90°.

The lever clamp according to claim 1, wherein the slit has a shape of a triangle, a rectangle, and a circular arc.

17. A lever clamp according to claim 1 wherein said base bottom wall further defines an additional raised wall that is further from the base side wall than the raised wall.

18. The lever clamp according to claim 17, wherein the additional protrusion walls comprise two or more and are arranged in alignment along a line.

The lever clamp according to claim 17, wherein the additional projection wall is formed by bending or cutting the bottom wall of the base and bending upward by 90°.

20. A lever clamp according to claim 19, wherein the additional slit formed by bending the additional projection wall on the base bottom wall is located on the same side or on the different side of the additional projection wall.