CN218852871U

CN218852871U - Dental floss box capable of hanging wires and hardware blade used by same

Info

Publication number: CN218852871U
Application number: CN202223424322.8U
Authority: CN
Inventors: 肖应忠; 李格
Original assignee: Guangdong Haitai Metal Products Co ltd
Current assignee: Guangdong Haitai Metal Products Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-04-14
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a dental floss box capable of hanging wires and a hardware blade used by the dental floss box, the dental floss box comprises a box body for storing a dental floss coil, a hardware blade arranged at the upper end of the box body and a closed cover body connected to one side of the upper end of the box body, the upper end of the box body is provided with a dental floss hole for the dental floss of the dental floss coil to penetrate out, the hardware blade comprises a base body fixed at the upper end of the box body and a cutter body which is punched and formed at the upper end of the base body and obliquely distributed relative to the base body, two sides of the cutter body are downwards bent to form a hanging wire part and a tangent part, the hanging wire part is obliquely distributed relative to the base body, a hanging wire opening is formed between the hanging wire part and the tangent part, the tangent part is obliquely distributed relative to the base body, and a cut-off opening is formed between the tangent part and the hanging wire opening; the dental floss of dental floss book is walked around the hanging wire opening after pulling out from the dental floss hole, by the dental floss of hanging wire opening centre gripping location dental floss book, the tip of dental floss turns to again through cutting off the opening and cuts off in order to form the dental floss of one section separation through cutting off the opening, the dental floss tip of dental floss book is by the centre gripping location at the hanging wire opening part, and it is more convenient to use.

Description

Dental floss box capable of hanging wires and hardware blade used by same

The technical field is as follows:

the utility model relates to the technical field of tooth cleaning appliances, in particular to a dental floss box capable of hanging wires and a hardware blade used by the dental floss box.

Background art:

the dental floss can be made of different materials such as silk thread, nylon thread, polyester thread, polytetrafluoroethylene thread and the like, and has the common characteristics of softness, elasticity and strong toughness, so that the dental floss can effectively clean the surface of hard tissues of teeth without damaging the soft tissues of gums. In particular, dental floss can be used to clean plaque from adjacent teeth, and is effective, particularly on flat or convex dental surfaces. This can be used: pulling down a section of dental floss with a length of about 25cm, tying a double-knot-shaped surface coil at two ends of the floss, or taking about 33cm of dental floss, winding two ends of the floss on two middle fingers, and passing the dental floss through contact points by using right and left fingers.

The existing dental floss is generally stored in the dental floss box, and the dental floss box can effectively isolate the dental floss from being contacted with the external environment when not in use, so that the safety of the dental floss during use is effectively improved.

For example, chinese utility model patent No. ZL202122360061.7 discloses a dental floss box convenient to use, which includes a dental floss sealing cap, an insertion piece, a connecting block, a tool bit, a connecting positioning groove, a dental floss groove, a blocking piece, an insertion projection, a ring bearing platform, and a dental floss storage tube. The working principle is as follows: can make the sealed cap of dental floss and the separation of dental floss storage pipe through carrying the sealed cap of dental floss of drawing, thereby make sprue and grafting lug expose in the user in the front, extract the top of sprue from the grafting lug to the sprue, thereby make the inner space of dental floss storage pipe expose, the user places the dental floss group in the dental floss storage pipe, and the one end of dental floss runs through the sprue through the dental floss groove, the one end winding of dental floss is in the outside of tool bit simultaneously, insert the sprue again between grafting lug and the ring plummer, the sealed cap of dental floss cup joints in the grafting lug outside, the preparation work of dental floss box can be accomplished this moment. When the dental floss storage device is used, the dental floss sealing cap is pulled up, one end of the dental floss is released from the tool bit, the dental floss at one end is pulled out from the dental floss storage tube for use, the tool bit is used for cutting off the used dental floss after the use, and then one end of the new dental floss is wound on the outer side of the tool bit again.

That is to say, the tool bit of the dental floss box can only be used for cutting off the dental floss, and when the dental floss box is not used, one end of a new dental floss needs to be wound on the outer side of the tool bit again, so that the dental floss box is complex to operate and inconvenient to use.

In view of the above, the present inventors propose the following.

The utility model has the following contents:

the utility model aims to overcome the defects of the prior art and provide a dental floss box capable of hanging wires and a hardware blade used by the dental floss box.

In order to solve the technical problem, the utility model discloses a following first technical scheme: this but dental floss box of hanging line includes: the tooth wire coil comprises a box body for storing a tooth wire coil, a hardware blade arranged at the upper end of the box body and a cover body which is connected to one side of the upper end of the box body and can be closed relative to the box body, wherein a tooth wire hole for a tooth wire of the tooth wire coil to penetrate out is formed in the upper end of the box body; the dental floss of the dental floss roll is pulled out of the dental floss hole and then bypasses the wire hanging opening, the dental floss of the dental floss roll is clamped and positioned by the wire hanging opening, the end part of the dental floss is further turned to pass through the cutting opening and is cut off through the cutting opening to form a section of separated dental floss, and the end part of the dental floss roll is clamped and positioned at the wire hanging opening.

Further, in the above technical solution, an included angle formed by a straight line where the thread hole and the thread hanging opening are located and a straight line where the thread hanging opening and the cut-off opening are located is less than 90 °.

Further, in the above technical solution, an angle of the wire hanging opening is smaller than an angle of the cutting opening.

Furthermore, among the above-mentioned technical scheme, the box body up end is provided with the arc wall of the dental floss of being convenient for take off the dental floss book, and this arc wall is located between dental floss hole and the five metals blade.

Furthermore, in the above technical solution, the base is a half-frame-shaped clamping structure, wherein the base includes a substrate, a bending plate extending downward along one side of the substrate, and a clamping plate formed by horizontally bending the lower end of the bending plate, the clamping plate is distributed in an inclined manner relative to the substrate, and a clamping space is formed between the substrate and the clamping plate and between the substrate and the bending plate; the cutter body is formed at the upper end of the substrate.

Furthermore, in the above technical solution, the end of the clamping plate is bent to form a guide plate inclined downwards.

Furthermore, in the above technical solution, the box body includes a front half box and a rear half box that are fastened together, a clamping position is formed at the rear side of the upper side of the front half box, the base is clamped and fixed on the clamping position through a clamping space, the front end of the rear half box props against the bending plate of the base, and the substrate is disposed on the upper side of the front half box.

In order to solve the technical problem, the utility model discloses a following second technical scheme: the hardware blade comprises a base body used for being fixed with the upper end of a box body of a dental floss box and a cutter body which is punched and formed at the upper end of the base body and is distributed obliquely relative to the base body, wherein two sides of the cutter body are bent downwards to form a wire hanging part and a wire cutting part, the wire hanging part is distributed obliquely relative to the base body, a wire hanging opening is formed between the wire hanging part and the base body, the wire cutting part is distributed obliquely relative to the base body, and a cutting opening is formed between the wire cutting part and the base body; the dental floss firstly bypasses the wire hanging opening and is clamped and positioned by the wire hanging opening, the end part of the dental floss is then turned to pass through the cutting opening and is cut off by the cutting opening, and the end part of the dental floss roll is clamped and positioned at the wire hanging opening.

Further, in the above-described aspect, the angle of the string-hanging opening is smaller than the angle of the cutting opening, the edge of the tangent portion facing the base body forms an acute-angled blade, and the cutting opening is formed between the blade and the base body.

Furthermore, in the above technical solution, the base is a half-frame-shaped clamping structure, wherein the base includes a substrate, a bending plate extending downward along one side of the substrate, and a clamping plate formed by horizontally bending the lower end of the bending plate, the clamping plate is distributed in an inclined manner relative to the substrate, and a clamping space is formed between the substrate and the clamping plate and between the substrate and the bending plate; the cutter body is formed at the upper end of the substrate; the tail end of the clamping plate is bent to form a guide plate which inclines downwards.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses when using, the floss of rolling up the dental floss is pulled out the back from the dental floss hole of box body and is walked around the hanging wire opening of five metals blade, the tip of this floss turns to the opening that cuts off through the five metals blade again, wherein, when the floss of rolling up the dental floss was walked around the hanging wire opening of five metals blade, this hanging wire opening can the dental floss of centre gripping location dental floss book, and the tip of this floss turns to when cutting off the opening again, can cut off through this to form the floss of one section separation, the floss tip of dental floss book is fixed a position at the hanging wire opening part by the centre gripping, so that pull the floss tip of dental floss book next time and can pull out the floss of dental floss book from the hanging wire opening part, and need not to wind the floss several rings on the five metals blade and just can fix a position, it is more convenient to operate, so that next time use, the order the utility model discloses the market competition who has. In addition, because the hanging wire part and the cutting line part are formed by bending the two sides of the cutter body downwards, the design can prevent hurting people, and the use is safer.

Description of the drawings:

FIG. 1 is a perspective view of the dental floss case of the present invention;

FIG. 2 is an assembly view of the front half of the cartridge and hardware blade of the present invention;

FIG. 3 is an exploded perspective view of the dental floss holder of the present invention;

FIG. 4 is a cross-sectional view of the dental floss case of the present invention;

FIG. 5 is a perspective view of the front half of the present invention;

fig. 6 is a perspective view of the hardware blade of the present invention;

fig. 7 is a perspective view of another view angle of the hardware blade according to the present invention;

fig. 8 is a front view of the middle hardware blade of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Referring to fig. 1-8, a dental floss box capable of hanging wires comprises: the tooth floss storage box comprises a box body 1 for storing a tooth floss coil, a hardware blade 2 arranged at the upper end of the box body 1 and a cover body 3 which is connected to one side of the upper end of the box body 1 and can be closed relative to the box body 1, wherein the upper end of the box body 1 is provided with a tooth floss hole 101 for the tooth floss 4 of the tooth floss coil to penetrate out. When in use, the dental floss 4 of the dental floss roll penetrates out of the dental floss hole 101, the dental floss 4 of the dental floss roll bypasses the hardware blade 2, and the dental floss 4 is forcibly pulled, so that the dental floss can be cut off by the hardware blade 2 to form a section of separated dental floss for a user to use.

In order to cut off the separation back with the dental floss, still need the opposite direction winding just can liberate the phenomenon of dental floss 4 when using, guarantee around several rings of location, next time the dental floss 4 that need roll up the dental floss avoiding appearing on five metals blade 2 the utility model discloses it is more convenient to use, makes the dental floss 4 that the dental floss was rolled up hang on five metals blade 2 to pull out the use next time, the utility model discloses make the improvement with five metals blade 2, specifically as follows:

the hardware blade 2 comprises a base body 21 used for being fixed with the upper end of the box body 1 and a blade body 22 which is punch-formed at the upper end of the base body 21 and is distributed obliquely relative to the base body, two sides of the blade body 22 are bent downwards to form a wire hanging part 221 and a tangent part 222, the wire hanging part 221 is distributed obliquely relative to the base body 21, a wire hanging opening 23 is formed between the wire hanging part 221 and the base body 21, the tangent part 222 is distributed obliquely relative to the base body 21, and a cutting opening 24 is formed between the tangent part 222 and the base body 21; the floss 4 of the dental floss roll is pulled out of the floss hole 101 and bypasses the floss hanging opening 23, the floss 4 of the dental floss roll is clamped and positioned by the floss hanging opening 23, the end of the floss 4 is further turned to pass through the cutting opening 24 and is cut through the cutting opening 24 to form a segment of separated floss, and the end of the floss 4 of the dental floss roll is clamped and positioned at the floss hanging opening 23. That is to say, the utility model discloses when using, walk around the hanging wire opening 23 of five metals blade 2 after pulling out the dental floss 4 of dental floss book from dental floss hole 101, the tip of this dental floss 4 turns to cutting off opening 24 through five metals blade 2 again, wherein, when the dental floss 4 of dental floss book walks around the hanging wire opening 23 of five metals blade 2, this hanging wire opening 23 can centre gripping the dental floss 4 of location dental floss book, and the tip of this dental floss 4 turns to when cutting off opening 24 again, can cut off so as to form the dental floss of one section separation through this cutting off opening 24, the dental floss 4 tip of dental floss book is held and is fixed a position in hanging wire opening 23 department, so that the dental floss 4 tip of pulling next time the dental floss book can be pulled out dental floss 4 of dental floss book from hanging wire opening 23 department, and need not to wind the dental floss 4 on blade 2 several rings and can fix a position, it is more convenient to operate, it uses next time to make the utility model have extremely strong market competition. In addition, since the hanging wire part 221 and the cutting wire part 222 are formed by bending downward both sides of the cutter body 22, the design can prevent injury to people and is safer to use.

The included angle between the line of the floss hole 101 and the string opening 23 and the included angle between the string opening 23 and the line of the cutting opening 24 are smaller than 90 degrees, which is defined in order to make the floss 4 of the floss roll pass the string opening 23 after being pulled out from the floss hole 101, and the floss 4 of the floss roll is clamped and positioned by the string opening 23.

The angle of the string opening 23 is smaller than the angle of the cut-off opening 24, so that the string opening 23 can better grip the dental floss 4 to hang the end of the dental floss 4 at the string opening 23, and the cut-off opening 24 is larger in opening, which does not grip the dental floss but cuts it off.

The upper end face of the box body 1 is provided with an arc-shaped groove 102 for conveniently taking off the dental floss 4 of the dental floss roll, the arc-shaped groove 102 is positioned between the dental floss hole 101 and the hardware blade 2, when the end part of the dental floss 4 is hung at the position of the wire hanging opening 23, the dental floss can cross over the arc-shaped groove 102, and when the end part of the dental floss 4 passes through the arc-shaped groove 102, the end part of the dental floss 4 is pulled out, so that the end part of the dental floss 4 is separated from the wire hanging opening 23.

The base 21 is a semi-square clamping structure and fixed at the upper end of the box body 1, wherein the base 21 comprises a substrate 211, a bending plate 212 extending downwards along one side of the substrate 211, and a clamping plate 213 formed by horizontally bending the lower end of the bending plate 212, the clamping plate 213 is distributed obliquely relative to the substrate 211, and a clamping space is formed between the substrate 211 and the clamping plate 213 as well as between the substrate 211 and the bending plate 212; the cutter body 22 is formed on the upper end of the base plate 211. The end of the holding plate 213 is bent to form a downwardly inclined guide plate 214. The box body 1 is including the fixed first half 11 and the latter half 12 together of mutual block, and the rear side of side is formed with centre gripping position 104 on this first half 11, base member 21 passes through the centre gripping space centre gripping to be fixed in on this centre gripping position 104, and the bent plate 212 of base member 21 is withstood to this latter half 12 front end, and this base plate 211 is arranged in this first half 11 and is gone up the side, and its assembly structure is simple to can guarantee assembly structure's stability, make the cutter body 22 of five metals blade 2 stably positioned box body 1 upper end.

The middle part of the inner cavity of the front half box 11 is provided with a shaft body 111, and the dental floss is sleeved on the shaft body 111 and can rotate relative to the shaft body 111 so as to be pulled out. The upper part of the inner cavity of the front half box 11 is formed with a plug column 112, the upper end of the rear half box 12 is provided with a shaft tube 121, the end part of the shaft tube 121 is sleeved on the end part of the plug column 112 to be fixedly connected, the shaft tube 121 is positioned below the dental floss hole 101, the dental floss of the dental floss roll is extended out from the dental floss hole 101 after bypassing the shaft tube 121, and the shaft tube 121 plays a guiding role.

To sum up, the utility model discloses when using, walk around the hanging wire opening 23 of five metals blade 2 after the dental floss 4 that rolls up the dental floss from the dental floss hole 101 of box body 1 pulls out, this dental floss 4's tip turns to the opening 24 that cuts off through five metals blade 2 again, wherein, when the dental floss 4 that the dental floss was rolled up walks around the hanging wire opening 23 of five metals blade 2, this hanging wire opening 23 can the centre gripping fix a position dental floss 4 that the dental floss was rolled up, and the tip of this dental floss 4 turns to again when cutting off opening 24, can cut off the dental floss in order to form one section separation through this opening 24 that cuts off, 4 tip of dental floss that the dental floss was rolled up is positioned at hanging wire opening 23 by the centre gripping, so that the 4 tip of dental floss 4 that next time was drawn up the dental floss roll up can be pulled out from hanging wire opening 23, and need not to wind dental floss 4 on five metals blade 2 several rings and just can fix a position, it is more convenient to operate, just use next time, the utility model has the market competition of dental floss. In addition, since the hanging wire part 221 and the cutting wire part 222 are formed by bending downward both sides of the cutter body 22, the design can prevent injury to people and is safer to use.

As shown in fig. 6-8, the present invention further provides a hardware blade, the hardware blade 2 includes a base 21 fixed to the upper end of the box body 1 of the dental floss box and a cutter body 22 formed on the upper end of the base 21 and distributed obliquely to the base, two sides of the cutter body 22 are bent downward to form a wire hanging portion 221 and a wire cutting portion 222, the wire hanging portion 221 is distributed obliquely to the base 21, a wire hanging opening 23 is formed between the wire hanging portions 221 and the base 21, the wire cutting portion 222 is distributed obliquely to the base 21, and a cutting opening 24 is formed between the wire cutting portions; the dental floss 4 is first passed around the string opening 23 and held by the string opening 23 to position the dental floss 4, the end of the dental floss 4 is then turned past the cut-off opening 24 and cut off through the cut-off opening 24, and the end of the dental floss 4 of the dental floss roll is held in position at the string opening 23. When specifically using, the dental floss 4 bypasses the hanging wire opening 23 of the hardware blade 2 earlier, the tip of this dental floss 4 turns to the cut-off opening 24 through the hardware blade 2 again, wherein, when the dental floss 4 of dental floss book bypasses the hanging wire opening 23 of the hardware blade 2, this hanging wire opening 23 can centre gripping location dental floss 4 of dental floss book, and the tip of this dental floss 4 turns to when cutting off opening 24 again, can cut off in order to form the dental floss of one section separation through this cut-off opening 24, the dental floss 4 tip of dental floss book is by the centre gripping location in hanging wire opening 23 department, so that pull the dental floss 4 tip of dental floss book next time and can pull out the dental floss 4 of dental floss book from hanging wire opening 23 department, and need not to wind the dental floss 4 on the hardware blade 2 several rings and just can fix a position, it is more convenient to operate, convenient next use, make the utility model have extremely strong market competitiveness. In addition, since the hanging line part 221 and the cutting line part 222 are formed by bending downward both sides of the cutter body 22, such a design can prevent injury to a person and is safer to use.

The angle of the string opening 23 is smaller than the angle of the cut-off opening 24, so that the string opening 23 can better grip the dental floss 4 to hang the end of the dental floss 4 at the string opening 23, and the cut-off opening 24 is larger, which does not grip the dental floss but cuts it off.

The edge of the cutting line part 222 opposite to the base body 21 forms an acute-angle blade, and the cutting opening 24 is formed between the blade and the base body 21, which is not enough to cut the dental floss more quickly, and the dental floss is pulled forcefully due to continuous cutting, so that the pulled dental floss is too long and is wasted.

The base 21 is a half-frame-shaped clamping structure, wherein the base 21 includes a substrate 211, a bending plate 212 extending downward along one side of the substrate 211, and a clamping plate 213 formed by horizontally bending along the lower end of the bending plate 212, the clamping plate 213 is obliquely distributed relative to the substrate 211, and a clamping space is formed between the substrate 211 and the clamping plate 213 as well as between the substrate 211 and the bending plate 212; the cutter body 22 is formed at the upper end of the substrate 211; the end of the holding plate 213 is bent to form a downwardly inclined guide plate 214. The base 21 is better mounted on the case, and the specific assembly structure is clearly described above and will not be further described here.

Of course, the above description is only for the specific embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent changes or modifications made by the structure, characteristics and principles according to the claims of the present invention should be included in the claims of the present invention.

Claims

1. A flossing box, comprising: a dental floss hole (101) that is used for storing box body (1) that the dental floss was rolled up and sets up in five metals blade (2) of this box body (1) upper end and connect in box body (1) upper end one side and can be relative box body (1) closed lid (3), and this box body (1) upper end has dental floss (4) that supply the dental floss to roll up to wear out, its characterized in that:

the hardware blade (2) comprises a base body (21) fixed to the upper end of the box body (1) and a cutter body (22) which is formed in a stamping mode at the upper end of the base body (21) and distributed obliquely relative to the base body, wherein two sides of the cutter body (22) are bent downwards to form a wire hanging portion (221) and a tangent line portion (222), the wire hanging portion (221) is distributed obliquely relative to the base body (21), a wire hanging opening (23) is formed between the wire hanging portion and the tangent line portion, the tangent line portion (222) is distributed obliquely relative to the base body (21), and a cutting opening (24) is formed between the tangent line portion and the base body; the dental floss (4) of the dental floss roll is pulled out of the dental floss hole (101) and then bypasses the hanging wire opening (23), the dental floss (4) of the dental floss roll is clamped and positioned by the hanging wire opening (23), the end part of the dental floss (4) is further turned to pass through the cutting opening (24) and is cut off through the cutting opening (24) to form a section of separated dental floss, and the end part of the dental floss (4) of the dental floss roll is clamped and positioned at the hanging wire opening (23).

2. A dental floss case capable of hanging a thread according to claim 1, wherein: the included angle formed by the straight line of the thread hole (101) and the thread hanging opening and the straight line of the thread hanging opening and the cutting opening is smaller than 90 degrees.

3. A flossing dental floss cassette according to claim 2, wherein: the angle of the wire hanging opening is smaller than that of the cut-off opening.

4. A dental floss case on which a thread can be hung according to any one of claims 1 to 3, wherein: the dental floss box is characterized in that an arc-shaped groove (102) of the dental floss (4) convenient for taking down the dental floss roll is arranged on the upper end face of the box body (1), and the arc-shaped groove (102) is located between the dental floss hole (101) and the hardware blade (2).

5. The dental floss box capable of hanging wires according to claim 4, characterized in that: the base body (21) is a semi-square clamping structure, wherein the base body (21) comprises a substrate (211), a bending plate (212) extending downwards along one side of the substrate (211), and a clamping plate (213) formed by horizontally bending the lower end of the bending plate (212), the clamping plate (213) is obliquely distributed relative to the substrate (211), and a clamping space is formed among the substrate (211), the clamping plate (213) and the bending plate (212); the cutter body (22) is formed at the upper end of the base plate (211).

6. A dental floss box capable of hanging wires according to claim 5, characterized in that: the tail end of the clamping plate (213) is bent to form a guide plate (214) which inclines downwards.

7. A dental floss holder capable of hanging a floss according to claim 5, wherein: the box body (1) comprises a front half box (11) and a rear half box (12) which are mutually clamped and fixed together, a clamping position (104) is formed at the rear side of the upper side of the front half box (11), the base body (21) is clamped and fixed on the clamping position (104) through a clamping space, the front end of the rear half box (12) props against a bending plate (212) of the base body (21), and the base plate (211) is arranged on the upper side of the front half box (11).

8. The utility model provides a five metals blade which characterized in that: the hardware blade (2) comprises a base body (21) used for being fixed with the upper end of a box body (1) of a dental floss box and a blade body (22) which is punch-formed at the upper end of the base body (21) and is distributed obliquely relative to the base body, two sides of the blade body (22) are bent downwards to form a wire hanging part (221) and a tangent part (222), the wire hanging part (221) is distributed obliquely relative to the base body (21), a wire hanging opening (23) is formed between the wire hanging part and the tangent part, the tangent part (222) is distributed obliquely relative to the base body (21), and a cutting opening (24) is formed between the tangent part and the base body; the dental floss (4) firstly bypasses the wire hanging opening (23) and is clamped and positioned by the wire hanging opening (23), the end part of the dental floss (4) is then turned to pass through the cutting opening (24) and is cut off by the cutting opening (24), and the end part of the dental floss (4) of the dental floss roll is clamped and positioned at the wire hanging opening (23).

9. The hardware blade of claim 8, wherein: the angle of the thread hanging opening is smaller than that of the cutting opening, the edge of the tangent part (222) opposite to the base body (21) forms an acute-angle blade, and the cutting opening (24) is formed between the blade and the base body (21).

10. The hardware blade according to claim 8 or 9, wherein: the base body (21) is a semi-square clamping structure, wherein the base body (21) comprises a substrate (211), a bending plate (212) extending downwards along one side of the substrate (211), and a clamping plate (213) formed by horizontally bending the lower end of the bending plate (212), the clamping plate (213) is obliquely distributed relative to the substrate (211), and a clamping space is formed among the substrate (211), the clamping plate (213) and the bending plate (212); the cutter body (22) is formed at the upper end of the base plate (211); the tail end of the clamping plate (213) is bent to form a guide plate (214) which inclines downwards.