CN217648441U

CN217648441U - Paper cutting device

Info

Publication number: CN217648441U
Application number: CN202221642045.5U
Authority: CN
Inventors: 徐奇
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-25
Anticipated expiration: 2032-06-29

Abstract

The utility model provides a paper cutting device, which comprises a main body, a cutting assembly and a paper roller group; the cutting assembly comprises a fixed blade, a movable blade cutting mechanism and an elastic element; the static blade is fixedly connected to the main body; the movable blade cutting mechanism comprises a movable blade and a driving mechanism, and the driving mechanism drives the movable blade to reciprocate along the fixed track; the elastic element is used for pushing the movable blade or the static blade, so that the matching tightness of the movable blade and the static blade is ensured during cutting; the paper roller group is formed by arranging single paper rollers in pairs, and when paper is cut, the two paper rollers roll reversely, so that the paper to be cut is pulled to reach a designated position. According to the paper cutting device, the elastic element is additionally arranged on the cutting assembly and used for enhancing the tangent fit between the cutting surfaces of the movable blade and the fixed blade, so that the cutting rate of paper is higher, and the cut is smoother.

Description

Paper cutting device

Technical Field

The utility model relates to a paper cutting device technical field especially relates to a paper cutting device.

Background

Nowadays, various paper products are widely used in our lives. In the production of fixed-format paper products or printing, it is necessary to cut the paper instead of being processed from a roll of wound paper. The existing paper cutting device usually adopts a movable blade to be matched with a static blade to cut off paper, but due to the influence of the matching degree between the movable blade and the static blade, the existing paper cutting scheme has the problems that the cutting rate is not high enough and the cut is not smooth frequently.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a not enough to prior art, the embodiment of the utility model provides a paper cutting device, this paper cutting device can solve the lower and problem of incision unevenness of current paper cutting device cut-off rate.

The paper cutting device includes:

a main body, a cutting assembly and a paper roller set;

the cutting assembly comprises a fixed blade, a movable blade cutting mechanism and an elastic element; the static blade is fixedly connected to the main body, and the cutting part of the static blade is vertical to the paper surface to be cut; the movable blade cutting mechanism comprises a movable blade and a driving mechanism, the driving mechanism drives the movable blade to reciprocate along a fixed track, and the movable blade is tangent to the cutting end face of the static blade during cutting; the elastic element is used for pushing the movable blade or the static blade, so that the matching tightness of the movable blade and the static blade is ensured during cutting;

the paper roller group is formed by arranging single paper rollers in pairs, and when paper is cut, the two paper rollers roll reversely, so that the paper to be cut is pulled to reach a designated position.

As a further alternative of the paper cutting device, the main body further comprises a movable blade support, the movable blade support is connected to the main body in a sliding manner, and the movable blade is fixedly connected to the movable blade support.

As a further alternative of the paper cutting device, the driving mechanism includes a driving element, a turntable, and a limit kinematic pair, and a rotating shaft of the turntable is connected with the driving element; a straight rod is fixedly connected to the rotary table, a sliding groove is formed in the movable cutter support, and the straight rod is connected to the sliding groove in a sliding mode; when the driving element drives the turntable to rotate, the sliding groove and the straight rod convert the circular motion of the turntable into the linear reciprocating motion of the movable blade, and the limiting kinematic pair is used for limiting the movement of the movable blade along the cutting direction.

As a further alternative of the paper cutting device, the limiting kinematic pair comprises a limiting slide block and a limiting slide rail; the limiting slide block and the limiting slide rail are respectively and fixedly connected to the movable knife bracket or the main body, and the limiting slide block is slidably connected to the limiting slide rail.

As a further alternative of the paper cutting device, two ends of the elastic element respectively abut against the main body and the movable blade holder and generate pressure on the movable blade holder.

As a further alternative of the paper cutting device, the elastic element is a spring, a spring limiting rod is fixedly connected to the main body, the spring is sleeved on the spring limiting rod, and one end of the spring abuts against the movable knife support and is in a compressed state.

As a further alternative of the paper cutting device, the paper roller sets at least comprise two sets which are distributed on two sides of the cutting assembly, and the paper roller sets are matched and rotated to tension the paper to be cut.

As a further alternative of the paper cutting device, the paper roller sets are set to different rotation speeds, and the rotation speed of the paper roller set on one side of the cutting assembly close to the paper roll is slightly lower than that of the paper roller set on the other side of the cutting assembly, so that the paper can be better tensioned.

As a further alternative of the paper cutting device, a baffle is fixedly connected to the main body, and the baffle is located behind the paper to be cut in the cutting direction and used for preventing the movable blade from damaging the machine body or a user when the movable blade is cut excessively.

As a further alternative of the paper cutting device, the main body further includes a stationary blade holder, and the stationary blade is fixedly attached to the main body by the stationary blade holder.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

because the elastic element is additionally arranged on the cutting assembly and is used for enhancing the tangent fit between the cutting surfaces of the movable blade and the fixed blade, the cutting rate of paper is higher, and the cut is smoother.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic structural view of a paper cutting device according to an embodiment of the present invention;

description of the main element symbols:

10-main body, 11-moving knife bracket, 111-chute, 12-static knife bracket, 13-spring limiting rod and 14-baffle;

20-a set of paper rollers;

31-spring, 32-static blade, 33-movable blade, 341-driving element, 342-rotary table, 3421-straight rod, 351-limiting slide block and 352-limiting slide rail.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An embodiment of the utility model provides a paper cutting device for solve among the prior art problem that the cut-off rate is lower and the incision unevenness.

Referring to fig. 1, the paper cutting device includes a main body 10 (only a portion of the main body 10 serving as a main connecting and carrying member is shown), a cutting assembly, and a paper roller assembly 20; the cutting assembly comprises a static blade 32, a movable blade cutting mechanism and an elastic element; the static blade 32 is fixedly connected to the main body 10, and the cutting part is vertical to the paper surface to be cut; the movable blade cutting mechanism comprises a movable blade 33 and a driving mechanism, the driving mechanism drives the movable blade 33 to reciprocate along the fixed track, and the movable blade 33 is tangent to the cutting end face of the fixed blade 32 during cutting; the elastic element is used for pushing the movable blade 33 or the fixed blade 32, so that the matching tightness of the movable blade 33 and the fixed blade 32 is ensured during cutting; the paper roller group 20 is formed by arranging a pair of single paper rollers, and when cutting paper, the two paper rollers roll reversely, thereby pulling the paper to be cut to a designated position.

According to the paper cutting device, the elastic element is additionally arranged on the cutting assembly and used for enhancing the tangent fit between the cutting surfaces of the movable blade and the fixed blade, so that the cutting rate of paper is higher, and the cut is smoother.

In one embodiment, the main body 10 further includes a stationary blade support 12, the stationary blade support 12 is fixedly connected to the main body 10, and the stationary blade 32 is fixedly connected to the stationary blade support 12.

In another embodiment, the main body 10 further includes a movable blade holder 11, the movable blade holder 11 is slidably connected to the main body 10, and the movable blade 33 is fixedly connected to the movable blade holder 11, that is, the movable blade holder 11 drives the movable blade 33 to reciprocate along a predetermined track.

The arrangement of the stationary blade support 12 or the movable blade support 11 has the advantages that the stationary blade 32 and the movable blade 33 can be conveniently replaced; for the movable blade 33, some grooves, holes or intermediate elements can be processed on the movable blade support 11 to realize the reciprocating motion of the movable blade 33, when the knife edge of the movable blade 33 is passivated or damaged, the movable blade 33 can be directly replaced, and the grooves, the holes or the intermediate elements can be reserved; the moving blade 33 can also be directly made of more standardized components without special customization.

In a specific embodiment, the driving mechanism includes a driving element 341, a rotating disc 342 and a limiting kinematic pair, a rotating shaft of the rotating disc 342 is connected to the driving element 341, a straight rod 3421 is fixedly connected to the rotating disc 342, a sliding slot 111 is formed in the movable blade support 11, and the straight rod 3421 is slidably connected to the sliding slot 111. When the driving element 341 drives the rotating disc 342 to rotate, the straight rod 3421 and the sliding groove 111 cooperate to convert the rotating motion of the rotating disc 342 into the linear reciprocating motion of the movable blade 33; and the limiting kinematic pair is used for limiting the motion of the movable blade 33 along the cutting direction, so that the deviation in other directions is avoided.

In a more specific embodiment, the limiting sliding pair includes a limiting slider 351 and a limiting sliding rail 352, the limiting slider 351 and the limiting sliding rail 352 are respectively fixedly connected to the movable blade holder 11 or the main body 10, the limiting slider 351 is slidably connected to the limiting sliding rail 352, and the extending direction of the limiting sliding rail 352 is the same as the cutting direction, so as to limit the reciprocating direction of the movable blade 33 to the cutting direction.

In another more specific embodiment, the driving element 341 is a stepper motor.

The stepping motor has the advantages of simple structure, reliable work and long service life.

In another specific embodiment, the drive mechanism includes a timing belt and a drive element 341. The synchronous belt comprises a belt wheel and a belt body, the movable cutter support 11 is fixed on the belt body through clamping, and the belt wheel is connected with the driving element 341. When the driving element 341 drives the belt wheel to rotate, the belt body drives the movable knife bracket 11 to do linear motion.

In yet another specific embodiment, the drive mechanism includes a gear, a rack, and a drive element 341. The rack is fixedly connected to the movable blade holder 11, and the gear is engaged with the rack and connected to the driving member 341. When the driving element 341 drives the gear to rotate, the gear further drives the movable knife assembly fixedly connected with the rack to do linear motion.

Since the synchronous belt and the gear and rack cooperation scheme both require the forward and reverse rotation of the driving element 341 to realize the reciprocating motion of the movable blade 33, the scheme of the straight rod 3421 cooperating with the sliding groove 111 can be taken as a practical preferred scheme.

There are various options for the arrangement of the elastic element.

In a specific embodiment, two ends of the elastic element respectively abut against the main body 10 and the movable blade holder 11, and generate pressure on the movable blade holder 11, so that the cutting surfaces of the movable blade 33 and the stationary blade 32 can be stably attached during cutting.

In a more specific embodiment, the elastic element is a spring 31, the main body 10 is fixedly connected with a spring limiting rod 13, one end of the spring 31 is sleeved on the spring limiting rod 13, and the other end of the spring 31 abuts against the movable knife bracket 11 and is in a compressed state.

In another more specific embodiment, the elastic element is a short rubber rod, one end of which is fixedly connected to the main body 10 and the other end of which abuts against the movable blade holder 11.

Because the contact surface between the spring 31 or the rubber short rod and the movable blade support 11 can generate relative motion when the movable blade 33 reciprocates, and the generated friction force can make the spring 31 or the rubber short rod bend and deform along the motion direction of the movable blade 33 to influence the pressurizing effect, in some further specific embodiments, one end of the rubber short rod or the spring 31 in contact with the movable blade support 11 is fixedly connected with a sliding block, a sliding groove is formed in the corresponding position of the movable blade support 11, and the sliding block is connected in the sliding groove in a sliding manner, so that the adverse effect caused by friction is reduced.

In another specific embodiment, two ends of the elastic element respectively abut against the main body 10 and the stationary knife holder 12, and generate pressure on the stationary knife holder 12, so that the cutting surfaces of the movable blade 33 and the stationary blade 32 can be stably attached during cutting. Since the specific arrangement is similar to that when the elastic element abuts against the movable blade support 11, the detailed description is omitted here.

In some embodiments, to further enhance the cutting effect, a plurality of elastic elements may be disposed to abut against the movable blade holder 11 and the stationary blade holder 12, so as to apply pressure to the movable blade 33 and the stationary blade 32 from two opposite directions, so that the cutting surfaces are more closely fitted during cutting.

In order to tension the paper to be cut to ensure that the cut is smooth, in one embodiment, the paper roller sets 20 include at least two sets, which are disposed on two sides of the cutting assembly, and the paper roller sets 20 are rotated in cooperation to tension the paper to be cut.

To further enhance the tensioning effect of the paper roll stack 20 on the paper to be cut, in one particular embodiment, the rotational speed is different between the paper roll stacks. Specifically, the paper roller set 20 on one side of the cutting assembly adjacent the paper roll rotates at a slightly slower speed than the paper roller set 20 on the other side of the cutting assembly; the faster set of paper rollers 20 will pull the paper to be cut slightly by friction, thereby enhancing the tensioning effect. In order to prevent excessive tension deformation of the sheet, the surface of the sheet roller set 20 rotating at a high speed should have a relatively low coefficient of friction so as to be able to slip on the surface of the sheet to be cut.

In order to further enhance the safety of the paper cutting device, in one embodiment, a baffle 14 is further disposed on the main body 10, and the baffle 14 is located behind the paper to be cut in the cutting direction for preventing the movable blade 33 from being over-cut and possibly damaging the machine body or the user.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A paper cutting device is characterized by comprising a main body, a cutting assembly and a paper roller group;

the cutting assembly comprises a fixed blade, a movable blade cutting mechanism and an elastic element; the static blade is fixedly connected to the main body;

the movable blade cutting mechanism comprises a movable blade and a driving mechanism, the driving mechanism drives the movable blade to reciprocate along a fixed track, and the movable blade is tangent to the cutting end face of the static blade during cutting; the elastic element is used for pushing the movable blade or the static blade, so that the matching tightness of the movable blade and the static blade is ensured during cutting;

2. The paper cutting device according to claim 1, wherein the main body further comprises a movable blade holder, the movable blade holder is slidably connected to the main body, and the movable blade is fixedly connected to the movable blade holder.

3. The paper cutting device according to claim 2, wherein the driving mechanism includes a driving element, a turntable, and a limit kinematic pair, and a rotation shaft of the turntable is connected to the driving element; a straight rod is fixedly connected to the rotary table, a sliding groove is formed in the movable cutter support, and the straight rod is connected to the sliding groove in a sliding mode; when the driving element drives the turntable to rotate, the sliding groove and the straight rod convert the circular motion of the turntable into the linear reciprocating motion of the movable blade, and the limiting kinematic pair is used for limiting the movement of the movable blade along the cutting direction.

4. The paper cutting device according to claim 3, characterized in that the limiting kinematic pair comprises a limiting slide block and a limiting slide rail; the limiting slide block and the limiting slide rail are respectively and fixedly connected to the movable knife bracket or the main body, and the limiting slide block is slidably connected to the limiting slide rail.

5. The paper cutting device according to claim 2, wherein both ends of the elastic element respectively abut against the main body and the movable blade holder and generate pressure on the movable blade holder.

6. The paper cutting device according to claim 5, wherein the elastic element is a spring, a spring limiting rod is fixedly connected to the main body, the spring is sleeved on the spring limiting rod, and one end of the spring abuts against the movable blade support and is in a compressed state.

7. The sheet cutting device of claim 1, wherein the set of rollers includes at least two sets disposed on opposite sides of the cutting assembly, the sets of rollers being cooperatively rotatable to tension the sheet to be cut.

8. The slitting device as claimed in claim 7, wherein the roller sets are set at different speeds, the speed of the roller sets on one side of the cutting assembly adjacent the reel being slightly lower than the speed of the roller sets on the other side of the cutting assembly, thereby providing better tension to the paper.

9. The paper cutting device according to claim 1, wherein a baffle is fixedly connected to the main body, and the baffle is located behind the paper to be cut in the cutting direction and used for preventing the movable blade from damaging the machine body or a user when the movable blade is cut excessively.

10. The paper cutting device of claim 1, wherein the main body further includes a stationary blade holder, and the stationary blade is fixedly attached to the main body by the stationary blade holder.