CN111038081B

CN111038081B - Flexible cloth printing and dyeing equipment capable of performing colorful circular printing and dyeing

Info

Publication number: CN111038081B
Application number: CN201911378580.7A
Authority: CN
Inventors: 冯晓栋
Original assignee: Xu Peideng
Current assignee: Xu Peideng
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-12-14
Anticipated expiration: 2039-12-27
Also published as: CN111038081A

Abstract

The invention provides flexible cloth printing and dyeing equipment capable of performing colorful circular printing and dyeing, which comprises a main body, a fixing piece, a rotating piece, a top piece, a motor bin, a mounting piece and a printing piece, wherein the fixing piece is arranged on the main body; the main body is of a rectangular plate-shaped structure, and two sides of the bottom of each supporting leg of the main body are of inclined structures; the inner side of the fixed part is connected with the right end of the main body in a fixed connection mode, and a moving hole is formed in the middle position of the top end of the fixed part; the rotating part is arranged on the inner side of the fixed part, and the top ends of the moving parts at the two ends of the rotating part are arranged in the moving groove through springs; the rotating part is used for installing in the inboard of mounting through the moving part for the inside spring of shifting chute can push up moving part downstream, thereby makes the moving part drive the guide roll of rotating part and below and contacts closely, makes the cloth when the process, can be got rid of its inside moisture by effectual, thereby makes this device in printing and dyeing stamp, and the effect is better.

Description

Flexible cloth printing and dyeing equipment capable of performing colorful circular printing and dyeing

Technical Field

The invention belongs to the technical field of printing and dyeing equipment, and particularly relates to flexible cloth printing and dyeing equipment capable of performing colorful circular printing and dyeing.

Background

Printing and dyeing is also called dyeing and finishing. Is a processing mode and is also a general term for pretreatment, dyeing, printing, after finishing, washing and the like; the dyeing and finishing specialty of this department has been incorporated into the light chemical engineering specialty at present.

For example, application No.: CN200810002157.2 relates to a textile printing and dyeing method and equipment thereof, which comprises a frame, a power system and a driving roller, and is characterized in that the driving roller is provided with a conveyer belt, the conveyer belt is made of air permeable materials or is provided with air holes, and the upper side and the lower side of the conveyer belt are respectively provided with a vacuum adsorption system and a plurality of atomization systems. The method utilizes a vacuum negative pressure adsorption mode to print and dye the atomized dye on the fabric, and has the advantages of simple process, low printing and dyeing cost, strong operability, high printing and dyeing efficiency, good printing and dyeing effect, and uniform and beautiful color of the printed and dyed fabric; can save dye and water resource, does not need rinsing process and has no pollution. The printing and dyeing equipment disclosed by the invention is simple and reasonable in structure and strong in controllability, and can ensure the printing and dyeing effect of the fabric.

Based on prior art discovery, current flexible cloth printing equipment is when using, the cloth is when printing and dyeing, can dye earlier usually or spout wetly to make the effect of printing and dyeing better, at this moment the inside moisture that is infected with easily of cloth, the in-process at printing and dyeing makes the stamp warp easily, and current flexible cloth printing equipment is when using, if need change different stamps, can't realize changing on same platform machine, it is convenient inadequately to use, and the pattern of stamp is diversified inadequately.

Disclosure of Invention

In order to solve the technical problems, the invention provides flexible cloth printing and dyeing equipment capable of performing multicolor circular printing and dyeing, which aims to solve the problems that when the conventional flexible cloth printing and dyeing equipment is used, cloth is usually dyed or sprayed with moisture firstly when being printed, so that the printing and dyeing effect is better, at the moment, the inside of the cloth is easily stained with moisture, and a printing is easily deformed in the printing and dyeing process, and when the conventional flexible cloth printing and dyeing equipment is used, if different printing needs to be replaced, the flexible cloth printing and dyeing equipment cannot be replaced on the same machine, the flexible cloth printing and dyeing equipment is not convenient and fast to use, and the printing styles are not diversified.

The invention relates to a flexible cloth printing and dyeing device capable of carrying out multicolor circular printing and dyeing, which is achieved by the following specific technical means:

a flexible cloth printing and dyeing device capable of carrying out multicolor circular printing and dyeing comprises a main body, a fixing piece, a rotating piece, a jacking piece, a motor bin, a mounting piece and a printing piece; the main body is of a rectangular plate-shaped structure, and two sides of the bottom of each supporting leg of the main body are of inclined structures; the inner side of the fixed part is connected with the right end of the main body in a fixed connection mode, and a moving hole is formed in the middle position of the top end of the fixed part; the rotating part is arranged on the inner side of the fixed part, and the top ends of the moving parts at the two ends of the rotating part are arranged in the moving groove through springs; two sides of the top piece are connected with the top end of the inner side of the fixed piece in a fixed connection mode, and a rubber pad is arranged inside the top end of the top piece; a motor is fixedly arranged in the motor bin, and the motor bin and the insertion blocks on the two sides are inserted into the top end of the top piece and the insertion slots; the bottom end of the mounting piece is inserted into the mounting groove, and the clamping pieces on two sides of the bottom of the mounting piece are inserted into the clamping grooves on two sides of the mounting groove; the printing piece is arranged above the main body, and the stress pieces at the two ends of the printing piece are arranged in the inner groove through springs.

Further, the main body comprises a mounting groove; a plurality of mounting grooves with rectangular structures are arranged on two sides of the top end of the main body, and two sides of the top end of each mounting groove are of inclined structures; and clamping grooves are formed in two sides of the interior of the mounting groove.

Further, the fixing piece comprises a moving groove; the fixing piece is of a rectangular structure, and the inner side of the outer end of the fixing piece is of an inclined structure; and a moving groove with a T-shaped structure is arranged in the fixing piece.

Further, the rotating part comprises a moving part; connecting shafts of T-shaped circular structures are arranged at two ends of the rotating piece and embedded in the moving piece of the T-shaped structure; the top of moving member is equipped with the pull rod, and the pull rod is installed in the inside in the removal hole on mounting top.

Further, the top piece comprises a slot; the top piece is of a rectangular structure, and a groove of the rectangular structure is formed in the top end of the top piece; the top both sides of top spare are equipped with the slot of rectangle structure, and the top both sides of slot are the slope column structure.

Further, the motor cabin comprises a cam; the motor cabin is of a rectangular structure, and inserting blocks are arranged on two sides of the motor cabin; the outside of the motor inside the motor bin is provided with a transmission rod, and the outside of the transmission rod is provided with a plurality of cams.

Further, the mounting piece comprises a clamping piece and an inner groove; the mounting piece is of a rectangular structure, and clamping pieces and pressing pieces of wedge-shaped structures are mounted inside two sides of the mounting piece through springs; an inner groove of a T-shaped structure is arranged inside the mounting piece.

Further, the printing part comprises a stress part; the printing piece is of a rectangular long strip structure, and the bottom of the printing piece is provided with a printing; and stress parts with rectangular structures are arranged on two sides of the printing part.

Compared with the prior art, the invention has the following beneficial effects:

in the device, a rotating part and an installation part are arranged, wherein the rotating part is arranged on the inner side of a fixed part through a moving part, so that a spring in a moving groove can push the moving part to move downwards, and the moving part drives the rotating part to be in close contact with a guide roller below the rotating part, so that the cloth can effectively remove the moisture in the cloth when passing through the rotating part, the device has better effect when printing and dyeing, the connecting shafts at the two ends of the rotating part are of T-shaped structures and can be embedded in the rotating groove on the inner side of the moving part to rotate, when the rotating part is connected with the moving part, the rotating part can still rotate smoothly and can move to extrude the moisture in the cloth, the moving part is used for receiving the supporting force of the spring to drive the rotating part to move, the moving part is of a T-shaped structure and is arranged in the moving groove stably, the moving part can be controlled to move upwards through manpower, so that the moving part is driven to move upwards, and the bottom of the rotating part can be inserted with cloth;

still furthermore, the mounting member is used for driving the printing member to be mounted at the top end of the main body, so that when the printing member is required to be replaced to print different printing patterns, the mounting member can be manually taken down to take the printing member down, thereby replacing the printing member with different printing patterns, the clamping members and the pressing members at two sides of the mounting member are used for inserting the bottom end of the mounting member into the mounting groove through manpower when the mounting member is mounted and used, so that the clamping members can be contacted with the clamping grooves at two sides inside the mounting groove, thereby stably fixing the mounting member, if the mounting member is required to be dismounted, the pressing members can be pressed through manpower, so that the springs inside the mounting member can be retracted, thereby driving the clamping members to retract, the clamping members and the inside of the pressing members are integrated, thereby the mounting member can be conveniently dismounted, and the inner grooves of the T-shaped structures inside the mounting member are used for mounting two ends of the printing member and the stressed members, make the seal can be guided by the installed part, thereby make the seal can reciprocating up-and-down motion, thereby stamp, thereby solved when using, the cloth is when printing and dyeing, can dye earlier usually or spout wetly, thereby make the effect of printing and dyeing better, at this moment the inside moisture that is infected with easily of cloth, make the stamp warp at the in-process of printing and dyeing easily, and current flexible cloth printing and dyeing equipment when using, if when needing to change different stamps, can't realize the change on same platform machine, it is convenient inadequately to use, and the not enough diversified problem of pattern of stamp.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective and partially enlarged structure of the main body of the present invention.

Fig. 3 is a schematic view of the structure of separating the rotating member from the moving member according to the present invention.

Fig. 4 is a schematic cross-sectional view of the fastener of the present invention.

Fig. 5 is a schematic view of the enlarged part a of the present invention from fig. 4.

Fig. 6 is a perspective view of the mounting member and the printing member of the present invention.

Fig. 7 is a schematic bottom view of the mount of the present invention.

Fig. 8 is a schematic perspective view of a print of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a main body; 101. mounting grooves; 2. a fixing member; 201. a moving groove; 3. a rotating member; 301. a moving member; 4. a top piece; 401. a slot; 5. a motor compartment; 501. a cam; 6. a mounting member; 601. a fastener; 602. an inner tank; 7. printing; 701. a force-bearing member.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a flexible cloth printing and dyeing device capable of carrying out multicolor circular printing and dyeing, which comprises: the printing machine comprises a main body 1, a fixed part 2, a rotating part 3, a top part 4, a motor bin 5, a mounting part 6 and a printing part 7; the main body 1 is of a rectangular plate-shaped structure, two sides of the bottom of the supporting leg of the main body 1 are of an inclined structure, the middle position in the mounting groove 101 is used for mounting a spring, so that the spring can push the printing part 7 upwards, and clamping grooves in two sides in the mounting groove 101 are used for embedding the clamping piece 601, so that the mounting part 6 can be stably fixed; the inner side of the fixed part 2 is connected with the right end of the main body 1 in a fixed connection mode, a moving hole is formed in the middle position of the top end of the fixed part 2, the moving groove 201 is used for installing a spring and the moving part 301, so that the moving part 301 can be pushed by the spring to move in the moving groove 201, and the moving part 301 can drive the rotating part 3 to move; the rotating piece 3 is arranged on the inner side of the fixed piece 2, the top ends of the moving pieces 301 at two ends of the rotating piece 3 are arranged in the moving groove 201 through springs, and the pull rod at the top end of the moving piece 301 is used for being positioned above the fixed piece 2, so that the moving piece 301 can be controlled to move upwards through manpower, the moving piece 301 is driven to move upwards, and cloth can be inserted into the bottom of the rotating piece 3; the two sides of the top piece 4 are connected with the top end of the inner side of the fixing piece 2 in a fixed connection mode, a rubber pad is arranged inside the top end of the top piece 4, the slot 401 is used for installing the insertion blocks on the two sides of the motor bin 5, so that the motor bin 5 can be stably installed and fixed, and the top end of the slot 401 is of an inclined structure, so that the insertion blocks can be inserted more quickly and conveniently, and the motor bin 5 can be taken down conveniently when the printing piece 7 needs to be replaced; a motor is fixedly arranged in the motor bin 5, and the motor bin 5 and the insertion blocks on the two sides are inserted into the top end of the top piece 4 and the insertion slot 401; the bottom end of the mounting member 6 is inserted into the mounting groove 101, the clips 601 at the two sides of the bottom of the mounting member 6 are inserted into the slots at the two sides of the mounting groove 101, and the inner grooves 602 of the T-shaped structure in the mounting member 6 are used for mounting the two ends of the printing member 7 and the stress member 701, so that the printing member 7 can be guided by the mounting member 6, and the printing member 7 can reciprocate up and down to print; the stamp 7 is installed above the main body 1, and the force-receiving members 701 at both ends of the stamp 7 are installed inside the inner groove 602 by springs, and the bottom ends of the force-receiving members 701 are long so that the bottom ends of the force-receiving members 701 can be inserted inside the installation groove 101, so that the bottom of the stamp 7 can be closely contacted with the upper side of the cloth.

Wherein, the main body 1 comprises a mounting groove 101; a plurality of mounting grooves 101 with rectangular structures are arranged on two sides of the top end of the main body 1, and two sides of the top end of each mounting groove 101 are of inclined structures; the inside both sides of mounting groove 101 are equipped with the draw-in groove, and mounting groove 101 here is used for making the bottom of installed part 6 male to make the installation that installed part 6 can be convenient, make printing part 7 can dismantle the change, and the top both sides of mounting groove 101 are slope column structure, are in order to make installed part 6 when inserting, can be guided, thereby make installed part 6 can be by quick installation.

Wherein, the fixed part 2 comprises a moving groove 201; the fixing piece 2 is of a rectangular structure, and the inner side of the outer end of the fixing piece 2 is of an inclined structure; the fixing part 2 is internally provided with a moving groove 201 with a T-shaped structure, the fixing part 2 is arranged at the right end of the main body 1, so that the cloth can be drained by the rotating part 3 when entering the upper part of the main body 1, and the inner side of the outer end of the fixing part 2 is of an inclined structure, so that the cloth can be guided when entering.

Wherein, the rotating member 3 comprises a moving member 301; two ends of the rotating piece 3 are provided with connecting shafts of T-shaped circular structures, and the connecting shafts are embedded in the moving piece 301 of the T-shaped structures; the top end of the moving part 301 is provided with a pull rod, the pull rod is arranged in a moving hole at the top end of the fixed part 2, the rotating part 3 is arranged at the inner side of the fixed part 2 through the moving part 301, so that a spring in the moving groove 201 can push the moving part 301 to move downwards, the moving part 301 drives the rotating part 3 to be in close contact with a guide roller below, so that the moisture in the cloth can be effectively removed when the cloth passes through, the device has better effect in printing and dyeing, the connecting shafts at the two ends of the rotating part 3 are of a T-shaped structure, the connecting shafts can be embedded in the rotating groove at the inner side of the moving part 301 to rotate, when the rotating part 3 is connected with the moving part 301, the rotating part 3 can still smoothly rotate and can move, the moisture in the cloth is squeezed out, and the moving part 301 is used for receiving the supporting force of the spring to drive the rotating part 3 to move, the moving member 301 has a T-shaped structure, so that the moving member 301 is stably installed in the moving groove 201, and can smoothly move, so that the moving member 301 is not separated.

Wherein, the top part 4 comprises a slot 401; the top piece 4 is of a rectangular structure, and a groove of the rectangular structure is formed in the top end of the top piece 4; the top both sides of top 4 are equipped with the slot 401 of rectangular structure, and the top both sides of slot 401 are the slope column structure, and top 4 here is used for installing at the top intermediate position of mounting 2 for motor storehouse 5 when using, can the embedding install at the inside and rubber pad contact in top of top 4, thereby avoid motor storehouse 5 to produce the vibration when using.

Wherein, the motor chamber 5 comprises a cam 501; the motor bin 5 is of a rectangular structure, and inserting blocks are arranged on two sides of the motor bin 5; the outside of the motor inside the motor bin 5 is provided with a transmission rod, the outside of the transmission rod is provided with a plurality of cams 501, the motor bin 5 is used for installing the motor, the motor can drive the cams 501 to rotate through the transmission rod, the inserting blocks on two sides of the motor bin 5 are used for being inserted into the slots 401, the motor bin 5 is limited, the cams 501 are used for receiving the rotating force of the transmission rod, the cams 501 are rotated under the stress, and the printing piece 7 is pressed downwards.

Wherein, the mounting part 6 comprises a clamping piece 601 and an inner groove 602; the mounting piece 6 is of a rectangular structure, and clamping pieces 601 of a wedge-shaped structure and pressing pieces are mounted inside two sides of the mounting piece 6 through springs; an inner groove 602 with a T-shaped structure is arranged inside the mounting part 6, the mounting part 6 is used for driving the printing part 7 to be mounted at the top end of the main body 1, so that when the printing part 7 needs to be replaced to print different shapes of stamps, the mounting part 6 can be taken down by manpower, so that the printing part 7 can be taken down, so that the printing part 7 with different stamps can be replaced, the clamping parts 601 and the pressing parts on two sides of the mounting part 6 are used for inserting the bottom end of the mounting part 6 into the mounting groove 101 by manpower when the mounting part 6 is mounted and used, so that the clamping parts 601 can be contacted with the clamping groove inner parts on two sides inside the mounting groove 101, so that the mounting part 6 is stably fixed, if the mounting part 6 needs to be dismounted, the pressing part can be pressed by manpower, so that the spring inside can be retracted, so that the clamping parts 601 are driven to be retracted, the clamping parts 601 are integrated with the inside of the pressing part, so that the mounting member 6 can be easily removed.

Wherein, the printing part 7 comprises a force-bearing part 701; the printing piece 7 is of a rectangular long strip structure, and the bottom of the printing piece 7 is provided with a printing; the two sides of the printing part 7 are provided with the stress parts 701 with rectangular structures, the printing part 7 is used for directly receiving the downward pressure transmitted by the cam 501, so that the printing part 7 can drive the printing die at the bottom to move downwards, printing is guided to cloth, the stress parts 701 are arranged inside the inner groove 602, the printing part 7 can be in a suspended state under the power of a spring when not used, and the printing part 7 can be moved upwards and reset under the action of the spring after printing is finished, so that printing is carried out at the next position.

When in use: when the printing machine needs to be used, the pressing piece can be pressed by manpower, so that the clamping piece 601 can be retracted inwards, then the mounting piece 6 and the motor bin 5 are taken down by manpower, so that the printing piece 7 with patterns to be printed is mounted, the stress piece 701 can be embedded into the inner groove 602, so that the bottom of the stress piece 701 is contacted with the spring, then the mounting piece 6 is mounted, then the bottom of the motor bin 5 is inserted and mounted above the top piece 4, then the pull rod is pulled, so that the moving piece 301 moves upwards, then cloth passes through the bottom of the rotating piece 3 by manpower and is contacted with the rotating rollers at the outer ends through the bottoms of the printing pieces 7, then the power switch of the motor at the outer ends is turned on, so that the rotating rollers can pull the cloth to move at a constant speed, then the power switch of the motor in the motor bin 5 is turned on, so that the motor drives the cam 501 to rotate through the transmission rod, so that the outer side of the cam 501 can press the stamp member 7 downwards one after the other, so that the cloth can be drawn out of different stamps.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a can carry out colorful flexible cloth printing and dyeing equipment that circulates printing and dyeing which characterized in that: the method comprises the following steps: the printing machine comprises a main body (1), a fixed part (2), a rotating part (3), a top part (4), a motor bin (5), a mounting part (6) and a printing part (7); the main body (1) is of a rectangular plate-shaped structure, and two sides of the bottom of each supporting leg of the main body (1) are of inclined structures; the inner side of the fixing piece (2) is connected with the right end of the main body (1) in a fixed connection mode, and a moving hole is formed in the middle position of the top end of the fixing piece (2); the rotating piece (3) is arranged on the inner side of the fixed piece (2), and the top ends of the moving pieces (301) at the two ends of the rotating piece (3) are arranged in the moving groove (201) through springs; two sides of the top piece (4) are connected with the top end of the inner side of the fixed piece (2) in a fixed connection mode, and a rubber pad is arranged inside the top end of the top piece (4); a motor is fixedly arranged in the motor bin (5), and the motor bin (5) and the insertion blocks on the two sides are inserted into the top end of the top piece (4) and the insertion groove (401); the bottom end of the mounting piece (6) is inserted into the mounting groove (101), and the clamping pieces (601) on two sides of the bottom of the mounting piece (6) are inserted into the clamping grooves on two sides of the mounting groove (101); the printing piece (7) is arranged above the main body (1), and the stress pieces (701) at two ends of the printing piece (7) are arranged in the inner groove (602) through springs.

2. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the main body (1) comprises a mounting groove (101); a plurality of mounting grooves (101) with rectangular structures are arranged on two sides of the top end of the main body (1), and two sides of the top end of each mounting groove (101) are of inclined structures; and clamping grooves are formed in two sides of the interior of the mounting groove (101).

3. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the fixing piece (2) comprises a moving groove (201); the fixing piece (2) is of a rectangular structure, and the inner side of the outer end of the fixing piece (2) is of an inclined structure; and a moving groove (201) with a T-shaped structure is arranged in the fixing piece (2).

4. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the rotating part (3) comprises a moving part (301); two ends of the rotating piece (3) are provided with connecting shafts of circular structures, and the connecting shafts are embedded in the moving piece (301) of the T-shaped structure; the top end of the moving piece (301) is provided with a pull rod, and the pull rod is installed inside a moving hole in the top end of the fixing piece (2).

5. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the top piece (4) comprises a slot (401); the top piece (4) is of a rectangular structure, and a groove of the rectangular structure is formed in the top end of the top piece (4); the two sides of the top end of the top piece (4) are provided with slots (401) of rectangular structures, and the two sides of the top end of each slot (401) are of inclined structures.

6. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the motor bin (5) comprises a cam (501); the motor bin (5) is of a rectangular structure, and inserting blocks are arranged on two sides of the motor bin (5); the outside of the motor in the motor bin (5) is provided with a transmission rod, and the outside of the transmission rod is provided with a plurality of cams (501).

7. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the mounting part (6) comprises a clamping piece (601) and an inner groove (602); the mounting piece (6) is of a rectangular structure, and clamping pieces (601) with wedge-shaped structures and pressing pieces are mounted inside two sides of the mounting piece (6) through springs; an inner groove (602) with a T-shaped structure is arranged in the mounting piece (6).

8. The flexible cloth printing and dyeing apparatus capable of performing multicolor recycling printing and dyeing according to claim 1, wherein: the printing part (7) comprises a force bearing part (701); the printing piece (7) is of a rectangular strip-shaped structure, and the bottom of the printing piece (7) is provided with a printing; and stress parts (701) with rectangular structures are arranged on two sides of the printing part (7).