Shears

Abstract

Shears having two limbs connected at a revolute joint, each limb comprising a handle region at one end and a cutting edge at the other end. One limb is fixed relative to the revolute joint during an opening and closing movement, and one limb is movable. The limbs move between an open position and a closed position while being limited by a stop and, in the closed position, the cutting edges pass each other over substantially their entire length. On the handle side of the revolute joint, one limb extends relative to the other limb such that it is supported in a planar manner on both sides in a region of overlap with the other limb, wherein the limbs comprise surface regions which, in the closed position, rest against one another in the region in which they are on top of each other and are each exposed on the opposite side.

Claims

1. Shears comprising two limbs, each limb comprising a handle region at one end and a cutting edge at another end, wherein the limbs are connected to each other at a revolute joint, so that one of the limbs is a fixed limb that is fixed relative to the revolute joint during an opening and closing movement, and one of the limbs is a movable limb, wherein the limbs are configured to move between an open position and a closed position while being limited by a stop, and the cutting edges pass each other over substantially their entire length in the closed position, wherein one of the limbs extends relative to the other of the limbs on a handle side of the revolute joint, wherein the one limb has two planar sides and two face sides, the face sides extending between the planar sides at edges of the planar sides, such that the one limb is supported in a planar manner on both planar sides in a region of overlap with the other limb, wherein the limbs comprise surface regions that rest against one another in an area in which the limbs are on top of each other in the closed state, and are each exposed on an opposite side, and wherein the one supported limb is disposed between a plate-like region that overlaps the supported limb in a width direction on the planar side, and the supporting limb, wherein the plate like region and the supporting limb are connected to each other via two separate connections, with both of the connections being disposed outside of the supported limb and without penetrating the supported limb.

2. Shears comprising two limbs, each limb comprising a handle region at one end and a cutting edge at another end, wherein the limbs are connected to each other at a revolute joint, and comprise one fixed limb that is fixed relative to the revolute joint during an opening and closing movement, and one movable limb, wherein the limbs are configured to move between an open position and a closed position while being limited by a stop, and the cutting edges pass each other over substantially their entire length in the closed position, wherein one of the limbs extends relative to the other of the limbs on a handle side of the revolute joint, wherein the one limb has two planar sides and two face sides, the face sides facing a movement direction, such that the one limb is supported in a planar manner on both planar sides in a region of overlap with the other limb, wherein the limbs comprise surface regions that rest against one another in an area in which the limbs are on top of each other in the closed state, and are each exposed on an opposite side, and further comprising a support plate that overlaps the one limb facing away from the other limb, wherein the support plate is connected with the other limb while leaving a penetration slot, wherein the penetration slot is bounded by facing flat sides of the other limb and support plate, wherein a slot width (c) of the penetration slot viewed in a direction of extension of a rotational axis (x) essentially corresponds to a thickness of the other limb viewed in a same direction in a region passing through the penetration slot, and wherein a stop pin is arranged on the one limb, extending in the direction of the rotational axis (x), and interacting with a facing edge surface of the support plate in a stop-limiting manner, wherein support of the one limb is achieved via a two separate connections with at I st ono both of the connections being disposed outside of the supported limb and without penetrating the supported limb.

3. The shears according to claim 1, wherein the cutting edges extend in a V shape in the closed state in a radial direction from a rotational axis (x) of the revolute joint.

4. The shears according to claim 1, wherein the length of one of the cutting edges which the other cutting edge has passed over in the closed state is smaller than a largest width (b) measured transverse to a longitudinal extension of the supported limb in the supported region, over which the supported limb is supported on both sides.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained below based upon the attached drawing; however, the latter only shows exemplary embodiments. Therefore, a part explained only as relates to one of the exemplary embodiments and is not replaced by another part in a further exemplary embodiment owing to the characteristic feature highlighted therein is also described for this further exemplary embodiment as an at least possibly present part. The drawing shows:

(2) FIG. 1 a perspective view of shears of the kind in question, in the closed position;

(3) FIG. 2 an elevation view of the shears;

(4) FIG. 3 another view representation of the shears;

(5) FIG. 4 the section according to line IV-IV on FIG. 3;

(6) FIG. 5 a side view of the shears;

(7) FIG. 6 another perspective view of the shears, in the closed position;

(8) FIG. 6a the magnified depicted section according to line VIa-VIa on FIG. 6;

(9) FIG. 7 a view corresponding to FIG. 6, but in the open position;

(10) FIG. 8 a view corresponding to FIG. 7, but an embodiment with a provided stop pin, in the open shear position;

(11) FIG. 9 a perspective view of the shears according to FIG. 8;

(12) FIG. 10 the cutting head according to FIG. 8 in the closed position;

(13) FIG. 11 a perspective, exploded view of the shears;

(14) FIG. 12 a perspective view of the shears in another embodiment;

(15) FIG. 13 the section according to line XIII-XIII on FIG. 12.

DESCRIPTION OF THE EMBODIMENTS

(16) As shown and described, initially with reference to FIG. 1, are shears 1 with two limbs 2, 3, wherein each limb 2, 3 forms a handle region 4 and 5, and cutting edges 6, 7 at the end region facing away from the handle region 4, 5. The end regions forming the cutting edges 6, and 7 together comprise a cutting head 8 with a cutting jaw M bounded by the cutting edges 6 and 7 in the open position (e.g., see FIG. 7).

(17) The limbs 2 and 3 are joined together in a revolute joint 9. The joint pin 10 preferably provided for this purpose extends perpendicularly to the cutting plane E with its geometric rotational axis x. The resultant rotational direction of one of the legs 2 or 3 around the rotational axis x is marked r (see FIG. 7).

(18) The end regions of the limbs 2, 3 facing away from the handle regions 4, 5 have the cutting edges 6 and 7, and are designed to completely pass by each other during the closing movement of the cutting edges 6 and 7 in the cutting plane E. Preferably involved is a plate-shaped formation of the end regions, wherein respective plate edges are formed as the mentioned cutting edges 6 and 7.

(19) The cutting edges 6 and 7 preferably extend exclusively in the limb regions facing away from the handle regions 4 and 5 beyond the revolute joint 9 and each have a length l.

(20) The legs 2 and 3 preferably have a wide, plate-like design, and lie one on top of the other, intersecting in the revolute joint region of the facing flat sides.

(21) One of the limbs 2, 3 is supported on both sides in a planar manner on the handle side of the revolute joint 9, overlapping the other limb. According to the embodiment on FIGS. 12 and 13, this can be accomplished with a correspondingly slotted limb, through which the other limb is pushed. This results in an integral, materially uniform configuration of both overlapping regions by the one limb.

(22) As shown in the other illustrations according to FIGS. 1 to 11, a support plate 11 can alternatively be provided that overlaps the one limb, here limb 3, facing away from the other limb. In the depicted exemplary embodiments, this support plate 11 is connected with limb 2, and specifically preferably only with limb 2, leaving a penetration slot 12. This penetration slot 12 is correspondingly bounded by facing flat sides of the limb 2 and support plate 11, wherein a slot width c of the penetration slot 12 viewed in a direction of extension of the rotational axis x can preferably essentially correspond to the thickness of the other leg 3 viewed in the same direction in the region passing through the penetration slot 12.

(23) In relation to a view according to FIG. 3, the support plate 11 is fastened to limb 2 below the revolute joint 9, preferably on both sides of the overlapped and supporting limb 3 (connections 13, 14). A riveted attachment is shown.

(24) Viewed in the direction of extension of the rotational axis x, the support plate 11 can have a thickness that can correspond to about the thickness of the limb 2 and/or 3 measured in the same direction in the penetrated region, further to about 0.5 to 1.5 times a leg thickness.

(25) Beginning spaced apart from the facing end of the handle region 5 of limb 2, the support plate 11 further extends until into the region of the section of the limb 2 that helps form the cutting head 8, while the cutting head region that directly surrounds the cutting edge 6 is exposed. As shown, the pin of the revolute joint 9 can also pass through the support plate 11.

(26) A width b of the supported limb 3 in the overlapped region, i.e., in the region of the penetration slot 12, measured transverse to the longitudinal extension of the limb 3, can correspond to about 2 to 4 times the length l of a cutting edge 6, 7.

(27) As evident from the views on FIGS. 2 and 3, the cutting edges 6 and 7 in the closed state of the shears 1 project in a direction of the rotational axis x of the revolute joint 9 so as to open in a V shape, as also caused by the overlapping of the limb sections that have the cutting edges 6 and 7. An angle α of about 30° can establish itself between the cutting edges 6 and 7.

(28) In the closed shear position shown by example on FIG. 6, the surface regions 20 and 21 of the limb sections 22 and 23 with cutting edges 6 and 7 facing toward each other in the alignment of the rotational axis x rest against each other due to the overlapped position that arises in this closed position, while the sides 24 and 25 of the limb sections 22 and 23 with cutting edges 6 and 7 facing axially outward with reference to the alignment of the rotational axis x are exposed in this position, and at least in the closed shear position are thus not covered (see also FIG. 6a).

(29) As further evident from the views on FIGS. 8 and 10, a stop pin 15 can be arranged in one of the limbs, here in the leg 3 supported on both sides. It extends in the direction of the rotational axis x, and interacts with a facing edge surface 16 of the support plate 11 in a stop-limiting manner, establishing an opening limitation over the latter.

(30) In addition, a pivotable locking projection 17 can be provided. The latter can also be arranged around a rotational axis y directed identical to rotational axis x on the overlapped and supported limb 3, so as to interact with a step 18 formed in the support plate 11.

(31) A return spring 19 can also be provided between the limbs 2, 3 on the handle regions 4, 5, acting in the direction toward a spread handle position.

(32) With reference to a view according to FIG. 6, in which the rotational axis x is depicted as a point, an imagined elongation V of the cutting edge 6 of limb 3 intersects an imagined line L of the support plane in this closed position of the shears 1. This line L represents an imagined shortest connection of the contour of the support plane 11 in this view between the region of the support plate 11 having the connection 13 and the region of the support plate 11 having the revolute joint 9. The elongation V intersects this line L from the inside out with reference to the support plate 11, wherein the elongation V can include an acute angle relative to the line L of up to 15°, for example, and further of 5 to 10°, for example.

(33) In the open position according to FIG. 7, the cutting edges 6 and 7 in the view described above include an acute angle β of about 75 to 89° relative to each other, and further of about 80 to 85°, for example. The imagined elongation V of the cutting edge 6 intersects the support plate 11, here tangent to about the revolute joint 9, wherein the cutting edge 6 in this open position further includes an obtuse angle γ relative to the line L described above of about 120 to 150°, further of about 135°, for example.

(34) The cutting edge 7 of the limb 2 also includes an obtuse angle relative to the edge line of the support plate 11 facing it of about 120 to 150°. As opposed to the acute angle γ, however, this obtuse angle does not change during the pivoting displacement of the limbs, since the limb 2 is non-rotatably connected with the support plate 11.

(35) The above statements serve to explain the inventions encompassed by the application as a whole, which each independently further develop the prior art by at least the following feature combinations, wherein two, several or all of these feature combinations can also be combined, specifically:

(36) Shears, characterized in that, on the handle side of the revolute joint 9, the fixed or movable limb 2, 3 extends relative to the movable or fixed limb 3, 2 such that it is supported in a planar manner on both sides in a region of overlap with the movable or fixed limb 2, 3, wherein the limbs 2, 3 further comprise surface regions that rest against one another in the region in which they are on top of each other, and are exposed on the opposite side.

(37) Shears, characterized in that the cutting edges 6, 7 [the cutting edges 6, 7] open in a V shape in the closed state in a projection in the direction of a rotational axis x of the revolute joint 9.

(38) Shears, characterized in that the length L of one cutting edge 6, 7 which the other cutting edge 7, 6 has passed over in the closed state is smaller than a largest width b measured transverse to a longitudinal extension of the supported limb in the supported region, over which the supported limb is supported on both sides.

(39) Shears, characterized in that the support is achieved via a double connection 13, 14 between the plate-like region that overlaps the supported limb in its width direction on a broad side and the supporting limb.

(40) Shears, characterized in that the connection is provided at least once on each respective side of the supported limb.

(41) Shears, characterized in that the connection is only provided on one side of the supported limb.

(42) All disclosed features are essential to the invention, whether taken separately or in combination with each other. The disclosure of the application hereby also includes the disclosure content of the accompanying/attached priority documents (copy of prior application) in its entirety, including for the purpose of also incorporating features in these documents into the claims of the present application. The features in the subclaims characterize independent inventive further developments of prior art, in particular so as to generate partial applications based upon these claims. The invention indicated in each claim can additionally have one or several of the features indicated in the above specification, in particular ones provided with reference numbers and/or indicated in the reference list. The invention also relates to embodiments in which individual features from among those mentioned in the above specification are not realized, in particular to the extent that they are clearly unnecessary for the respective intended purpose or can be replaced by other technically equivalent means.

REFERENCE LIST

(43) 1 Shears 2 Limb 3 Limb 4 Handle region 5 Handle region 6 Cutting edge 7 Cutting edge 8 Cutting head 9 Revolute joint 10 Joint pin 11 Support plate 12 Penetration slit 13 Connection 14 Connection 15 Stop pin 16 Edge surface 17 Locking projection 18 Step 19 Return spring 20 Surface region 21 Surface region 22 Limb section 23 Limb section 24 Side 25 Side b Width c Slit width l Length r Rotational direction x Rotational axis y Rotational axis E Cutting plane L Line M Cutting jaw V Elongation α angle β angle γ angle