CN110125991B

CN110125991B - Cutting mechanism

Info

Publication number: CN110125991B
Application number: CN201910515744.XA
Authority: CN
Inventors: 陈植
Original assignee: Xiamen Shengyushun Technology Co ltd
Current assignee: Xiamen Shengyushun Technology Co ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2024-03-08
Anticipated expiration: 2039-06-14
Also published as: CN110125991A

Abstract

The invention provides a novel cutting mechanism, which comprises: an upper cover; a lower cover matched with the upper cover; a linear stationary blade; the movable blade is matched with the fixed blade, wherein the movable blade comprises two blades which are symmetrically arranged, and an included angle which is more than or equal to 150 degrees and less than or equal to 170 degrees is formed between the blades; the cutter driving assembly and the cutter detecting assembly are arranged between the upper cover and the lower cover; the cutter driving assembly is used for driving the movable blade to reciprocate relative to the fixed blade so as to cut paper towels; the cutter detection assembly is used for detecting the position of the cutter driving assembly, and when the cutter driving assembly returns to the original position, the cutter driving assembly is controlled to stop acting.

Description

Cutting mechanism

Technical Field

The invention relates to a cutting mechanism, in particular to a large-stroke automatic cutting mechanism for paper towels.

Background

The intelligent tissue box is a brand new subdivision product, is mainly used in the household field and microminiature office places of a small number of people (the tissues used in the occasions are small rolls of roll paper, no intelligent tissue box designed for the intelligent tissue box is available on the market), can provide tissues with different standard lengths according to different requirements through chip control, avoids waste, and further avoids various dirt caused by exposing the tissues. Meanwhile, the automatic paper outlet is adopted, so that the problem of paper breakage does not exist, and the embarrassment caused by paper breakage in a paper towel box does not exist.

The existing paper towels (roll paper) are all provided with cutting lines, but the positions of the cutting lines of each model and each batch of paper are different for each brand. The fixed paper outlet length of the intelligent tissue box determines the paper outlet length requirement of all models which cannot be compatible with all brands, and the paper tearing experience effect is poor, so that the intelligent tissue box is required to have a paper cutting function. The paper towel belongs to soft paper, and the hardness, thickness and thinness of different brands and different models are all completely different. However, the conventional automatic paper cutter has a weak cutting pushing force, and it is difficult to cut hard paper and soft paper of 0.2mm or more.

Disclosure of Invention

The invention provides a cutting mechanism which can effectively solve the problems.

The invention is realized in the following way:

a cutting mechanism, comprising:

an upper cover;

a lower cover matched with the upper cover;

a linear stationary blade;

the movable blade is matched with the fixed blade, wherein the movable blade comprises two blades which are symmetrically arranged, and an included angle which is more than or equal to 150 degrees and less than or equal to 170 degrees is formed between the blades; and

the cutter driving assembly and the cutter detecting assembly are arranged between the upper cover and the lower cover;

the cutter driving assembly is used for driving the movable blade to reciprocate relative to the fixed blade so as to cut paper towels; the cutter detection assembly is used for detecting the position of the cutter driving assembly, and when the cutter driving assembly returns to the original position, the cutter driving assembly is controlled to stop acting.

The beneficial effects of the invention are as follows: according to the invention, through the arrangement of the movable blade, the arrangement of the included angle between the two cutting edges in the movable blade is optimized, so that the thickest soft paper can be cut by the minimum thrust, namely, the movable blade can cut hard paper and soft paper with the thickness of more than 0.2mm by the minimum thrust, and particularly, the movable blade has a good cutting effect on soft paper with the thickness of 0.4 mm.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a cutting mechanism according to an embodiment of the present invention.

Fig. 2 to 4 are schematic structural views of part of elements in a cutting mechanism according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a part of elements of a cutter driving assembly in a cutting mechanism according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a movable blade in a cutting mechanism according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a slider in a cutting mechanism according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a cutter spring in a cutting mechanism according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a cutter bevel gear in a cutting mechanism according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a cutter detection assembly in a cutting mechanism according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.

In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1-10, an embodiment of the present invention provides a cutting mechanism, including:

an upper cover 10;

a lower cover 11 engaged with the upper cover;

a linear stationary blade 13;

the movable blade 14 is matched with the fixed blade 13, wherein the movable blade 14 comprises two blades 140 which are symmetrically arranged, and an included angle of more than or equal to 150 degrees and less than or equal to 170 degrees is formed between the blades 140; and

the cutter driving assembly and the cutter detecting assembly 19 are arranged between the upper cover 10 and the lower cover 11;

wherein the cutter driving component is used for driving the movable blade 14 to reciprocate relative to the fixed blade 13 so as to cut paper towels; the cutter detection assembly 19 is used for detecting the position of the cutter driving assembly, and controlling the cutter driving assembly to stop when the cutter driving assembly returns to the original position.

In other embodiments, the cutting edges 140 form an included angle of 155 ° or more and 165 ° or less. In this embodiment, the cutting edges 140 form an included angle of about 162 °. The setting of the included angle between the two cutting edges 140 in the movable blade 14 is optimized, so that the minimum pushing force can cut the thickest soft paper, namely, the movable blade 14 can cut hard paper and soft paper with the minimum pushing force more than 0.2mm, and particularly has good cutting effect on soft paper with the thickness of 0.4 mm. The blade 140 further includes a fixing hole 144 provided at the middle portion. As a further improvement, a first relief groove 141 is further provided at the junction of the two blades 140. The width of the relief groove 141 is 1 to 5mm. Preferably, the width of the first relief groove 141 is 1.5-2.5 mm. In this embodiment, the width of the first relief groove 141 is about 2mm. It will be appreciated that by the arrangement of the first relief groove 141, the paper towel can be cut incompletely (the cut paper cannot fall off), and the pulling force of the paper towel which is not cut can be ensured to be between 1N and 3N. The depth of the first relief groove 141 is not limited, and may be selected according to practical requirements, and preferably, the depth of the first relief groove 141 is about 5mm. As a further improvement, the end of the blade 140 near the stationary blade 13 further includes a pressing plate 142 pressed against the stationary blade 13.

Referring to fig. 1, the upper cover 10 partially covers the lower cover 11, and a gap 110 for allowing the movable blade 14 to move in and out is formed between the upper cover 10 and the lower cover 11. The lower cover 11 is provided with a channel 111 for allowing the tissues to pass through at a position close to the gap 110, and the fixed blade 13 is arranged at one side of the channel 111 away from the gap 110. The cutter driving assembly drives the movable blade 14 to reciprocate on the channel 111 and cooperates with the fixed blade 13 to cut the tissue.

The cutter driving assembly includes: a drive mechanism 12; a cutter spring 15; a rotating shaft 20; a cutter bevel gear 16; a link 21; a first slide groove 23; a second slide groove 17; and a slider 22.

Referring to fig. 2-3, the driving mechanism 12 includes a servo motor 120 and a screw 121. The servo motor 120 is used for controlling the screw 121 to rotate.

Referring to fig. 8, the cutter spring 15 includes a first spring 150 and a second spring 152 vertically disposed at one side of the first spring 150. The second elastic piece 152 is provided with a plurality of bolt holes 153, and the cutter elastic piece 15 may be fixedly disposed on the lower cover 11 or the upper cover 10 through the bolt holes 153. In this embodiment, the cutter spring 15 is fixedly disposed on the lower cover 11 through the bolt hole 153. The middle part of the first elastic piece 150 is provided with a circular through hole 151, and one side of the first elastic piece 150 away from the second elastic piece 152 is provided with a fixing hole 155/154.

The rotating shaft 20 is fixed on the upper cover 10.

Referring to fig. 9, the cutter bevel gear 16 is rotatable about the rotation axis 20 under the driving of the driving mechanism 12. Specifically, the cutter bevel gear 16 includes a cutter bevel gear body 160, a rotation shaft groove 163 disposed at one side of the middle of the cutter bevel gear body 160, and at least one fixing groove 161 disposed at the other side of the cutter bevel gear body 160 and surrounding the rotation shaft groove 163. That is, the fixing groove 161 is provided at a surface of the cutter bevel gear body 160 remote from the upper cover 10. The rotating shaft 2 is sleeved in the rotating shaft groove 163, and one end of the connecting rod 21 is fixed in one of the fixing grooves 161. The peripheral gear of the cutter bevel gear 16 is engaged with the screw 121 so as to be rotated by the servo motor 120. As a further improvement, the cutter bevel gear body 160 further includes a positioning notch 162 for determining whether the cutter bevel gear body 160 has rotated one revolution.

Referring to fig. 3, the connecting rod 21 includes a main shaft 220 and a protruding ring 221 disposed in the middle of the main shaft 220. One end of the connecting rod 21 is fixed in the fixing groove 161, and the other end passes through the circular through hole 151 and is clamped on the side wall of the circular through hole 151 through the protruding ring 221, so that the connecting rod 21 can revolve around the circular through hole 151 under the drive of the cutter bevel gear 16.

Referring to fig. 4-5, the first sliding plate 23 is fixedly disposed on a side of the lower cover 11 away from the fixed blade 13. Specifically, the first sliding plate 23 includes a first base plate 230, a first sliding groove 231 disposed along a length of the first base plate 230, and a plurality of buckles 232 disposed on the first base plate 230. The first sliding plate 23 is fixed to a side of the lower cover 11 away from the fixed blade 13 by the snap 232.

Referring to fig. 4-5, the second sliding plate 17 is fixedly disposed at one end of the cutter spring 15 near the fixed blade 13. Specifically, the second sliding plate 17 includes a second base plate 170, second sliding grooves 171 and first posts 172 respectively disposed on two opposite surfaces of the second base plate 170, and buckles 173 disposed on two sides of the first posts 172. The second sliding plate 17 is fixedly disposed on the surface of the cutter spring 15 away from the upper cover 11 through the buckle 173 and the fixing hole 154. And the first upright 172 passes through the fixing hole 155.

Referring to fig. 7, the slider 22 is slidably disposed between the first sliding plate 23 and the second sliding plate 17, and includes a slider body 220 and a sliding portion 222 disposed on the slider body 220 and engaged with the first sliding groove 231, wherein the slider body 220 includes a first sliding plate 2202 disposed along a sliding direction and engaged with the second sliding groove 171, a second sliding plate 2201 disposed along a direction perpendicular to the sliding direction, and a third sliding groove 2203 disposed along a length direction of the second sliding plate 2201. The other end of the link 21 is slidably disposed in the third sliding groove 2203, and the diameter of the protruding ring 221 is larger than the groove width of the third sliding groove 2203. The connecting rod 21 passes through the circular through hole 151 and is clamped on the side wall of the circular through hole 151 through the protruding ring 221. The movable blade 14 is fixedly arranged on the slide block 22. Specifically, the slider 22 further includes a positioning protrusion 224 that is adapted to the fixing hole 144, and the movable blade 14 is fixedly disposed on the slider 22 through the fixing hole 144 and the positioning protrusion 224. Further, the slider 22 further includes pressing blocks 223 disposed at both sides of the sliding portion 222, and further configured to fixedly dispose the movable blade 14 on the slider 22. Further, a second yielding groove 221 is also formed on the slider 22 corresponding to the first yielding groove 141, and the second yielding groove 221 is adapted to the shape and size of the first yielding groove 141. It will be appreciated that by the cooperation of the first sliding plate 23, the second sliding plate 17 and the sliding block 22, the resistance during the movement of the movable blade 14 can be reduced to the greatest extent.

The cutting mechanism may further comprise a spring 18, which is compressed between the cutter spring 15 and the upper cover 10. Specifically, the upper cover 10 includes a second upright disposed opposite to the first upright 172, and the spring 18 is sleeved between the first upright 172 and the second upright. It will be appreciated that by means of a combination of the cutter blades 15 and the springs 18, a greater pressure can be provided.

The cutter detecting assembly 19 determines whether the cutter driving assembly returns to the original position according to detecting the positioning notch 162. Specifically, the cutter detecting assembly 19 includes a light emitting diode 192 and a photoelectric sensor 191 disposed opposite to each other, and a avoiding groove 193 disposed between the light emitting diode 192 and the photoelectric sensor 191. The relief slot 193 is provided for the passage of the cutter bevel gear 16. As a further improvement, the cutter detecting assembly 19 further includes a fixing plate 190, and a first fixing groove 195 and a second fixing groove 196 disposed on the fixing plate 190. The light emitting diode 192 and the photoelectric sensor 191 are fixed to the first fixing groove 195 by a fixing rod 194, and the fixing plate 190 is fixed to the upper cover 10 by the second fixing groove 196.

According to the cutting mechanism provided by the embodiment of the invention, the configuration of the movable blade 14 and the cutter driving assembly can ensure that the thickest paper towel can be cut by the minimum thrust, and the resistance is effectively reduced. Therefore, the purpose of reducing power can be achieved. The power can be reduced from the original 12V working voltage to 5V working voltage. In addition, the cutting mechanism provided by the embodiment of the invention can realize a large stroke in a small space through the configuration of the movable blade 14 and the cutter driving assembly. The stroke of the common cutter is increased from 11mm to 18mm, and the large stroke has the advantages that the paper passing space is obviously enlarged, the paper passing space between the movable blade 14 and the fixed blade 13 is large enough, the narrowest part can reach 6mm, and the widest part can reach 12mm. Can ensure that the soft paper can smoothly pass through the cutter no matter how the soft paper is bent and wrinkled, and can not produce paper jam, thereby ensuring the effective shearing of the soft paper with the thickness of 0.4 mm.

The embodiment of the invention further provides a paper towel shearing method, which comprises the following steps:

s1, driving the movable blade 14 to move towards the fixed blade 13 in the channel 111, so that two ends of the tissue are gradually cut towards the middle to form a connecting part with a length of 1-5 mm;

s2, driving the movable blade 14 to reversely move towards the fixed blade 13 through the channel 111, and stopping after returning to the original point.

In step S1, preferably, the width of the connection portion is 1.5 to 2.5mm. In this embodiment, the width of the connection portion is about 2mm. Therefore, when the paper towel is cut, the paper towel is not completely cut (the cut paper does not fall off) and the pulling force of the paper towel which is not cut can be ensured to be between 1N and 3N.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting mechanism, comprising:

an upper cover (10);

a lower cover (11) engaged with the upper cover;

a linear stationary blade (13);

the movable blade (14) is matched with the fixed blade (13), wherein the movable blade (14) comprises two blades (140) which are symmetrically arranged, and an included angle which is more than or equal to 150 degrees and less than or equal to 170 degrees is formed between the blades (140); and

the cutter driving assembly and the cutter detecting assembly (19) are arranged between the upper cover (10) and the lower cover (11);

wherein the cutter driving assembly is used for driving the movable blade (14) to reciprocate relative to the fixed blade (13) so as to cut paper towels; the cutter detection assembly (19) is used for detecting the position of the cutter driving assembly, and controlling the cutter driving assembly to stop when the cutter driving assembly returns to the original position;

the cutter driving assembly includes:

a drive mechanism (12);

a cutter spring piece (15);

a rotating shaft (20) fixed on the upper cover (10);

the cutter bevel gear (16) can rotate around the rotating shaft (20) under the drive of the driving mechanism (12), and comprises at least one fixing groove (161), wherein the fixing groove (161) is arranged on the surface of the cutter bevel gear main body (160) far away from the upper cover (10);

a link (21) one end of which is fixed in the fixing groove (161);

a first sliding plate (23) fixedly arranged on one side of the lower cover (11) far away from the fixed blade (13) and comprising a first sliding groove (231);

the second sliding plate (17) is fixedly arranged at one end of the cutter elastic sheet (15) close to the fixed blade (13) and comprises a second sliding groove (171); and

a slider (22) disposed between the first sliding plate (23) and the second sliding plate (17), and including a slider body (220) and a sliding portion (222) disposed on the slider body (220) and engaged with the first sliding groove (231), the slider body (220) including a first sliding plate (2202) disposed along a sliding direction and engaged with the second sliding groove (171), a second sliding plate (2201) disposed along a direction perpendicular to the sliding direction, and a third sliding groove (2203) disposed along a length direction of the second sliding plate (2201), the other end of the link (21) being slidably disposed in the third sliding groove (2203), and the movable blade (14) being fixedly disposed on the slider (22);

the connecting rod (21) comprises a main shaft (220) and a protruding ring (221) arranged in the middle of the main shaft (220), and the diameter of the protruding ring (221) is larger than the groove width of the third sliding groove (2203); the cutter elastic sheet (15) comprises a circular through hole (151), and the connecting rod (21) passes through the circular through hole (151) and is clamped on the side wall of the circular through hole (151) through the protruding ring (221);

the cutter bevel gear body (160) further includes a locating notch (162);

the cutter detection assembly (19) judges whether the cutter driving assembly returns to the original point position according to the detection of the positioning notch (162); the cutter detection assembly (19) comprises a light emitting diode (192) and a photoelectric sensor (191).

2. The cutting mechanism of claim 1, wherein the blades (140) form an included angle of 162 °.

3. Cutting mechanism according to claim 2, further comprising a spring (18) arranged in compression between the cutter blade (15) and the upper cover (10).

4. A cutting mechanism according to claim 3, wherein the second sliding plate (17) comprises a first upright (172), the first upright (172) passes through a fixing hole (155) formed in the cutter elastic sheet (15), the upper cover (10) comprises a second upright opposite to the first upright (172), and the spring (18) is sleeved between the first upright (172) and the second upright.

5. The cutting mechanism of claim 4, wherein the drive mechanism (12) includes a servo motor (120) and a screw (121) that mates with the cutter bevel gear (16).

6. The cutting mechanism of claim 5, wherein an end of the blade (140) proximate the stationary blade (13) further comprises a platen (142) pressed against the stationary blade (13).