JP7266924B1 - toothbrush - Google Patents

Abstract

A conventional 360-degree toothbrush requires a plurality of parts such as disc-shaped brush bristles and spacers, is expensive to manufacture, and does not have the strength to withstand the teeth brushing of small animals such as cats. We provide products that solve those problems. A helical groove (9a) is provided in a brush head central part (9), and a brush bristle (5) clamped and fixed with a wire is wound around the groove to form a brush head upper part (10) and a brush head. Both bosses (10a) and (11b) of the lower part (11) are fitted into the through holes (9d) and fixed. By adopting a helical structure brush head, the number of parts can be greatly reduced compared to the conventional 360° type toothbrush, and the manufacturing cost can be suppressed. The metal wires and grooves (9a) of the brush bristles (5) make it difficult to break even if a small animal such as a cat bites it while brushing its teeth. [Selection drawing] Fig. 6

Description

TECHNICAL FIELD The present invention relates to a toothbrush in which bristles are arranged in a spiral shape and fixed to a brush head by a wire, and to a method for manufacturing the same.

Many commercially available toothbrushes are implantable toothbrushes in which a resin brush thread bundle is folded in two, inserted into a hole in a brush base, and fixed with a metal part. Conventional disc-shaped toothbrushes consist of a plurality of individual disc-shaped bristles, or a plurality of disc-shaped bristles and spacers that are alternately stacked on the constricted head portion, and the tip is melted and fixed. There is (see Patent Document 1).

Patent registration number 3646118

Disk-shaped toothbrushes currently on the market are manufactured by fitting and fixing a plurality of disk-shaped brush bristles into a constricted head portion. An effective brushing method for brushing the molar teeth of small animals such as cats is to rotate the handle of the brush so that the brush head rotates about its axis. Since the bristles are easily damaged, there is a need for a strong toothbrush that is resistant to damage even when pressure is applied by biting with the back teeth.

In addition, disc-shaped toothbrushes currently on the market require a plurality of spacers to be inserted between the disc-shaped brush bristles and the brush in order to manufacture the brush portion. Since a large number of parts are assembled and a large number of personnel are required for inspection, the production cost is high.

Conventional disk-shaped toothbrushes are integrated with the brush head and handle, and when the disk-shaped brush bristles are damaged, the entire toothbrush is replaced with a new one. rice field.

When you are licking or chewing the brush head with the paste that cats like, you can rotate the brush body to easily remove food debris and plaque, but the handle is unstable and difficult to rotate.

In order to achieve the above object, a toothbrush according to the first aspect of the present invention is characterized in that the bristles are arranged spirally and fixed by a wire in the circumferential direction. By holding and fixing the bristles with a wire, the bristles are not easily damaged even if the teeth of a small animal come into contact with the bristles. Furthermore, the spiral arrangement eliminates the need for a plurality of disk-shaped brushes, thereby reducing manufacturing costs.

Moreover, the toothbrush of the present invention 2 is characterized in that in the toothbrush of the present invention 1, the brush head and the handle can be separated. By doing so, if the brush bristles are damaged, only the brush head can be replaced and the handle can be reused, thereby reducing plastic waste.

Further, the toothbrush of the present invention 3 is characterized in that rod-like projections extending from between the brush head and the handle are provided on the diagonals sandwiching the brush head in parallel with the brush head. By doing so, the animal's teeth come into contact with the bar-shaped projections and cannot chew any more, so damage to the brush head can be suppressed.

Moreover, the toothbrush of the present invention 4 is characterized in that in the toothbrush of the present invention 3, the rod-like protrusion rotates in the circumferential direction of the brush head. By doing so, the brush head can be axially rotated even when the rod-like protrusion is bitten by the teeth of the animal, so that the teeth can be brushed accurately.

In the method of manufacturing a toothbrush according to the fifth aspect of the present invention, a spiral groove is provided in the circumferential direction of the brush head, a loop of one end of a wire to which brush bristles are fixed is fitted into the boss of the upper part of the brush head, and the central part of the brush head is formed. The bristles are wound from the upper part along the groove, and the loop of the other end of the wire is fitted into the through hole of the lower part of the brush head central part. and the upper part of the brush head, and between the center part of the brush head and the lower part of the brush head are fixed by welding. By reducing the number of parts compared to conventional disk-shaped toothbrushes, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

In the method of manufacturing a toothbrush according to the sixth aspect of the present invention, a spiral groove is provided in the circumferential direction of the integrated brush head, and one end of a wire holding and fixing brush bristles is fitted and fixed in a hole provided at one end of the spiral groove. Then, the wire is wound along the groove, the other end of the wire provided at the other end of the spiral groove is fitted and fixed, and the hole provided at the one end and the hole provided at the other end are fixed. A toothbrush manufacturing method is characterized in that the toothbrush is filled with a resin. By doing so, the number of parts can be further reduced, so the manufacturing process can be simplified, and the manufacturing cost can be reduced.

To provide a toothbrush which is durable for a long period of time without being easily damaged even if it is bitten by the teeth of small animals such as cats, by increasing strength by arranging bristles held and fixed by a wire in a spiral shape in the circumferential direction of the brush head. it becomes possible to

The external view of the toothbrush which shows the completed form of this invention. FIG. 4 is a side view showing a manufacturing process of bristles sandwiched and fixed by wires used in the brush head of the toothbrush of the present invention. Sectional drawing which shows the processing process of the brush hair shown in FIG. Side view (A), bird's-eye view (B), cross-sectional view (C) of the process of tapering the tip of the brush. The side view which shows the parts of a brush head. The process drawing which sets a brush hair to a brush head, and assembles it. Sectional drawing which shows the welding method of a brush head. FIG. 4 is a side view showing parts of the integrated brush head; Process drawing of setting and assembling brush bristles in the integrated brush head. Assembly process and external view of the handle of the toothbrush. The side view which shows the variation of the shape of a handle grip. An external view showing the structure of a brush head guard. The external view which attached the brush head guard to the toothbrush main body. 4A and 4B are external views showing the assembly process and structure of the brush head guard 2. FIG. FIG. 4 is an external view of another angle in which the brush head guard 2 is attached to the toothbrush body. An example of using the toothbrush of the present invention.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a toothbrush showing an embodiment of the present invention. 2 to 4 show a prototype of brush bristles used for the brush head, side views, and processing steps. FIG. 5 is an external view of the brush head part parts, and FIG. 6 explains the assembly process of the brush head part. FIG. 7 shows one method of welding the brush head. FIG. 8 is a side view showing the shape of the integrated brush head, and FIG. 9 shows the assembly process of the integrated brush head. Fig. 10 shows the external view of the handle parts and the assembly process. FIG. 11 shows various shape variations of the handle grip. FIG. 12 shows the assembly process and shape of the brush head guard, and FIG. 13 shows external views of the toothbrush body and the brush head guard attached from different angles. FIG. 14 shows the assembly process and shape of the brush head guard 2, and FIG. 15 shows an external view of the brush head guard 2 attached to the toothbrush body. FIG. 16 is an example of use of the toothbrush of the present invention.

The toothbrush of the present invention, as shown in FIG. 1, has a cylindrical brush head (1) at the tip of a rod-shaped handle. As shown in FIG. 6, the cylindrical brush head has bristles that are sandwiched and fixed by metal wires in the circumferential direction of a head part made of synthetic resin. there is In addition, the handle made of synthetic resin incorporates a non-slip rubber grip. In the description of the present invention, the brush head side is up and the handle side is down.

The toothbrush of the present invention is completed (100) by attaching a brush head (1) to a rod-shaped handle (2) as shown in FIG.

The manufacturing process of the brush head (1) includes the method shown in FIGS. 5 and 6 in which four parts are assembled and the method shown in FIGS. 8 and 9 in which two parts are assembled, which will be described later in detail.

The following modes are possible for the brush bristles that constitute the toothbrush. In brush bristles clamped and fixed by metal wires, bristles of different lengths and thicknesses can be mixed. By changing the material and thickness of the metal wire and the material and diameter of the brush head, the strength can be further increased, so it can be used for various animals. Thereby, the stiffness and feel of the brush can be adjusted.

For the boss that fits into the through hole of the central part of the brush head, the parts are more firmly fixed to each other by making an annular groove on the surface.

The one-piece brush head (15) is made by pre-integrating three parts, the upper part (10), the central part (9) and the lower part (11) of the brush head, and by which method it is manufactured. However, the completed form will be the brush head (1).

As a toothbrush for cats, the diameter of the central part (9) of the brush head and the part (15f) around which the bristles of the integrated brush head (15) are wound is 0.5 to 0.8 cm, and the bristles of the bristles (5) are The thickness of the brush is 0.1 to 0.3 mm and the length is 0.6 to 1 cm. In that case, the diameter of the through hole (9d) of the brush head is 0.2 to 0.4 cm, and the diameter of the boss fitted in the through hole is 0.19 to 0.39 cm. The length of the center part (9) of the brush head and the part (15f) where the brush bristles of the integrated brush head are wrapped shall be 1.5 to 2 cm, the distance between the bristles shall be 1 mm to 5 mm, and the bristles shall be in the circumferential direction. It will be 3 to 10 laps.

The interval (pitch) between the brush bristles arranged spirally in the circumferential direction of the brush head (1) is widened for animals with weak chewing force and narrowed for animals with strong chewing force. It is possible to adjust the balance between usability and strength, and it can be used for various animals. The interval (pitch) between brush bristles refers to the interval (pitch) between the spiral grooves provided in the circumferential direction of the brush head, or the interval of the metal wire that clamps and fixes the brush bristles wound around the brush head. (pitch).

The width and depth of the groove (9a) for fitting the bristles arranged spirally in the circumferential direction of the brush head (1) are made equal to the diameter of the wire portion where the bristles (5) are clamped and fixed. .

For small dogs, the diameter of the center part (9) of the brush head and the part (15f) where the brush bristles of the integrated brush head (15) are wound is 0.8 to 1.2 cm, and the bristles of the brush (5) are The length is 0.6-1.3 cm, and the diameter of the completed brush head is 2-3.8 cm.

The brush head central part (9) and the integrated brush head (15) are made of a metal material that has a very strong chewing force for medium-sized dogs, large dogs, and larger animals. Furthermore, it is possible to attach a brush head guard (17) and a brush head guard 2 (200) as shown in FIG. 9 to prevent the brush head from being bitten.

The brush head guard (17) may be made of a metal material such as stainless steel, and a cushioning material (18) such as a rubber material may be placed on the part that contacts the teeth so that the animal's teeth are not burdened.

The brush head guard 2 (200) has two rod-shaped protrusions (21) made of metal such as stainless steel, and the base part (19) and base part 2 (20) of the brush head guard 2 that support them are synthetic. It is suitable to use resin as the material.

As for the bristles, chemical fibers such as nylon and saturated polyester resin, and natural bristles such as pig hair and horse hair can be used.

Materials for the brush head (1) and handle (2) may be synthetic resins such as polypropylene or saturated polyester resin, natural materials such as wood, or metals.

The central part (9) of the brush head and the integral brush head (15) are preferably made of a material such as synthetic resin that is also flexible, assuming that they will be pressed by the teeth of small animals such as cats. As materials for the central part (9) of the brush head and the integrated brush head (15), it is also possible to use materials with a smooth surface and high hardness that are difficult for the teeth of cats, etc., to bite into.

The upper part of the brush head (10) and the lower part of the brush head (11) are made of synthetic resin with higher strength than the material of the central part of the brush head (9), making it a flexible central part of the brush head. (9) has the effect of supporting it from the inside by using it as a support, increasing the strength of the brush head itself.

If the brush head center part (9), the brush head upper part (10) and the brush head lower part (11) are made of metal such as stainless steel, it is possible to replace only the brush bristles. In that case, the through hole (9d) of the brush head center part (9) and the bosses (10a) and (11a) of the brush head upper part (10) and the brush head lower part (11) are threaded. Furthermore, since it becomes possible to reduce the diameter of the central part (9) of the brush head, it is expected that the feeling of use will be improved.

The rubber material of the anti-slip (13) of the brush handle (2) may be made uneven or elliptical so that it can be easily gripped and rotated.

The wire (3) used for the bristles (5) should ideally have a diameter of 0.1 mm to 0.5 mm, but a thicker wire should be used for animals with a strong bite force.

The central part of the brush head (9) is formed by filling synthetic resin into the spiral groove (9a) for fitting and fixing the brush bristles (5) and the spiral groove (15a) of the integrated brush head (15). In addition, when the portion (15f) around which the brush bristles of the integrated brush head (15) are damaged, the risk of the wire slipping out of the groove and damaging the inside of the mouth can be reduced.

For the wire (3) that clamps and fixes the brush bristles (5), it is possible to use a high-strength fiber other than metal.

Next, the method for manufacturing the toothbrush of the present invention will be described. In the first step, first, brush bristles as shown in FIG. 2 are manufactured. A wire (3) and a resin fiber (4) are used. A single wire is folded in two and twisted, resin fibers are clamped and fixed between the wires to form an interdental brush shape radially spreading 360° from the center of the twisted wire. It is sandwiched between two plates (6) shown in FIG. 3, and the resin thread (4) spread over 360° is brought to one side to form brush bristles (5). The brush bristles (5) are fixed to a base (8) shown in FIG. 4 and polished with a roller file (7) to process the tip of the brush bristles (5) into a tapered shape (4a).

The need for bristles (5) to be to one side is smooth and precise to the spiral grooves (9a) of the brush head center part (9) and the spiral grooves (15a) of the integral brush head (15). In addition, the space between the spirally arranged bristles can be maintained to ensure air permeability, so it is easy to wash and dry and has the effect of keeping it clean.

By moving the brush bristles (5) to one side, the length of the brush bristles is slightly different, the mouth feel becomes softer, and the portion where the bristles come into contact increases, thereby improving the toothbrushing effect.

In the second step, a spiral groove (9a) is formed in the central part (9) of the brush head as shown in FIG. 5, and a through hole (9d) is provided in the central part. Next, as shown in Fig. 6, hook the looped wire (3a) at the end of the brush bristles (5) made in the first step to the boss (10a) inside the upper part of the brush head (10), and attach the upper part of the head part. is pushed into the through-hole (9d) and fixed. At that time, the wire is inserted into the groove (9b) in the upper part of the head center part (9) so as not to create a gap at the connecting part. Wind the wire of the twisted brush bristles (5) along the spiral groove (9a) of the central part of the brush head as it is, and fit the wire into the groove (9c) on the lower surface of the central part of the brush head, The other end of the wire is inserted into the through hole (9d) and fixed. Furthermore, the brush head (1) is completed by pushing the boss (11a) of the lower part (11) of the brush head into the through hole (9d) and fixing it.

The connecting parts of the central part of the brush head (9) and the upper part of the brush head (10), and the central part of the brush head (9) and the lower part of the brush head (11) are respectively glued together. As shown in Fig. 7, a thin through hole (1a) is made in the center from the lower part of the brush head (11) to the upper part of the brush head (10), and the heated metal is welded. It is also possible to fit the rod (11d) into one body and fix it by welding.

For the purpose of increasing the strength of the integrated brush head (15), a through hole (1a) may be provided from bottom to top as shown in FIG. 7, and a heated metal rod (11d) or the like may be fitted therein.

The boss (10a) of the upper part and the boss (11a) of the lower part to be fitted into the through hole (9d) of the central part of the brush head (9) are made of a material with higher hardness than the central part of the brush head (9). This has the effect of supporting and reinforcing the flexible central part (9) from the inside, increasing the impact resistance of the entire brush head.

The brush head (1) can be manufactured by assembling four parts, the central part (9), the upper part (10), the lower part (11), and the brush bristles (5) as described above. Manufacturing is also possible by assembling two points, the body-shaped brush head (15) and the brush bristles (5).

Next, the process of assembling the integrated brush head (15) will be described. The wire (3a) of the brush bristles is fitted into the hole (15b) at the top of the integrated brush head using a welding rod (16) and fixed, and along the spiral groove (15a) the brush bristles (5) wire is wound and the end (3b) of the wire is fitted into the hole (15c) at the bottom of the integrated brush head with a welding rod (16) and fixed. Further, the brush head (1) is completed by filling the upper hole (15b) and the lower hole (15c) with resin.

The brush head (1) can be manufactured either by the method of assembling a plurality of parts in FIGS. 5 and 6, or by using the integrated brush head (15) of FIGS. Compared to the brush heads in FIGS. 5 and 6, the brush heads in FIGS. 8 and 9 are weaker because they do not have a boss in the center, but they can be produced in a larger quantity due to fewer parts and a simplified manufacturing process. production becomes possible.

In the third step, a handle (2) with anti-skid is manufactured. Fit the non-slip rubber grip (13) on the upper part of the handle part (12) in Fig. 10. Next, the lower part of the handle part (14) is connected and fixed to complete the handle.

The non-slip grip (13) of the handle is better made of rubber material, and there are various variations of the external shape as shown in FIG. It is also possible to make the surface uneven (13a) and (13b), or gently curved (13c) and (13d).

By placing a non-slip grip (13) made of a non-slip rubber material on the handle, the brush head can be easily rotated, and the bristles of small animals such as cats can be brushed accurately because the bristles continuously hit the teeth. becomes possible.

The upper stoppers (11c) and (15d) installed around the lower part of the brush head (1) and the lower stopper (12b) installed at the upper part of the handle are the brush head guard (17) and the brush head guard. 2 (200), but it is not essential to install it on a toothbrush for small animals such as cats that have a relatively weak biting force on the brush head.

A brush head guard (17) is also available to accommodate animals with very strong bites. It has the shape shown in Fig. 9 and is installed between the upper stoppers (11c) and (15d) at the lower part of the brush head and the lower stopper (12b). placed. The pressure from the teeth is distributed by two rod-shaped projections (17a) slightly thinner than the diameter of the center of the brush head on both sides, with the brush head sandwiched so as not to crush the head during brushing. effective.

Since the brush head guard (17) and brush head guard 2 (200) are arranged in parallel with the brush head (1) as the center, two rod-like parts aligned with the brush head (1) can be used when brushing the molar teeth of an animal. Since there are a total of three protrusions (17a), a plurality of protrusions (17a) can receive pressure from the teeth. This distributes the bite force and reduces the risk of tooth pressure being concentrated on the brush head and causing breakage.

When the brush head guard (17) is installed between the upper stoppers (11c) and (15d) of the lower part of the brush head and the lower stopper (12b), the handle (2) and the brush head guard (17) form a concentric structure. The brush head guard body (17) does not move and protects the brush head from the pressure of the teeth even when the Nari brush body is rotated about its axis.

The brush head guard (17) has a structure in which two bar-shaped projections (17a) protrude in the direction of the brush head around the toothbrush body from a ring-shaped base to be fitted on the upper part of the brush handle. When actually brushing the teeth, the two bar-like protrusions may be covered with a cushioning material (18).

By applying an annular groove (17b) to the inner part of the concentric ring structure of the brush head guard (17), it is possible to reduce the area in contact with the handle (2) and reduce friction, thereby increasing the rotation of the shaft. movement becomes smoother.

Brush head guard 2 (200) has the same application as brush head guard (17), but differs in form and manufacturing process.

The brush head guard 2 (200) consists of two rod-shaped projections (21), a cushioning material (18), a base part (19) of the brush head guard 2 that supports it and is attached to the handle, and a base part (19) of the brush head guard 2. It consists of a base part 2 (20).

The base part (19) and base part 2 (20) of the brush head guard 2 (200) are each semicircular. After assembly, the constricted part (19c) on the opposite side bends by opening the opening/closing part (20c). By doing so, it opens (200a) and is fitted on the upper part of the handle (2).

The base part (19) of the brush head guard 2 (200) and the base part 2 (20) have grooves (19a) and (20a) for incorporating two rod-shaped projections (21), and the lower part of the rod-shaped projection It is stable and prevents detachment by having a shape that matches the projection (21a) of the. Both sides of the groove (19a) are provided with recesses (19b) for connecting the parts, and protrusions (20b) for fitting the protrusions (19b) are provided on both sides of the groove (20a) on the opposite side.

The base part (19) of the brush head guard 2 (200) is provided with a constriction (19c) for opening and closing, and the base part 2 (20) on the opposite side is provided with a fastener (20e) to enable attachment and detachment. .

Annular grooves (19d) and (20d) are provided on the inner part of the concentric ring structure of the brush head guard 2 (200) to reduce the area in contact with the handle (2) and reduce friction. This makes the movement in the circumferential direction smoother.

When used for animals with very strong jaws, the brush head guard (17) is fitted above the handle (2) and the brush head (1) is attached.

Since the brush head guard 2 (200) can be opened and closed, it can be attached and detached even when the handle (2) and the brush head (1) are connected.

The brush head guard (17) is ideally made of a metal material such as stainless steel with high strength in order to disperse the load on the brush head due to the pressure of the teeth. A cushioning material (18) such as a rubber material may be attached to the two rod-like protrusions (17a) corresponding to the teeth.

The diameter of the brush head guard (17) with the bag-shaped cushion material (18) covering the two rod-shaped projections (17a) is the diameter of the brush head center part (9) and the integrated brush head. By making it slightly thinner than the diameter of the part (15f) where the hair is wrapped, it is possible to correspond to the angle of the gap between the teeth of the upper and lower jaw that occurs when opening the mouth from the back tooth side to the front tooth direction. The same applies to the two rod-like protrusions (21) of the brush head guard 2 (200).

One of the effects of the spirally arranged bristles, which is a feature of this brush head, is that the diameter of the brush head is uniform, so the load pressed by the teeth of small animals such as cats is distributed, and the wire Using the increases strength. Secondly, since the bristles are not in close contact with each other, the brush is breathable, easy to wash and dry, and easy to keep clean.

Although the brush is strong and hard to break, the brush head can be replaced when damaged or deteriorated, so it has the effect of reducing plastic waste compared to a brush with an integrated handle.

The toothbrush of the present invention is equipped with a brush head portion at the tip of the handle, and assembly of the brush head is simple with a small number of parts, and the brush head can be replaced. Connect the thread groove (11b) on the bottom of the brush head (1) and the thread groove (15e) of the integrated brush head (15) with the thread groove (12a) on the top of the handle (2). Or it can be easily replaced by releasing it.

Since the toothbrush of the present invention has a helical structure, the toothbrush of the present invention disperses the load applied by biting the brush head portion when brushing the teeth of small animals such as cats, and the use of metal wires makes it even stronger and less likely to break. You can brush efficiently while rotating the handle.

The tapered ends of the bristles keep the area soft against the gums, making it possible to clean every corner, such as between teeth and periodontal pockets, for smooth oral care.

The handle is made of a material and shape that makes it easy to hold and rotate with the fingers of one hand, and by brushing the oral cavity of small animals such as cats smoothly and accurately, you can expect a high toothbrushing effect.

Since there is no need to use the spacer used in conventional products in the brush head portion, an increase in the number of parts can be avoided, and the manufacturing process can be greatly rationalized. Since it is possible to reduce the manufacturing cost required for manufacturing these products, the market price can be offered at a low price.

If it can be offered to the market at a low price, oral care for small animals such as cats will become easier, and owners' awareness of oral care for pets will increase, and it can be expected to support the health of more animals.

1 brush head 1a through-hole 2 handle 3 wire 3a wire end loop 3b wire end 4 resin thread 4a tip of brush bristle processed into tapered shape 5 brush bristle 6 plate for sandwiching brush bristle and bringing it to one side 7 brush bristle Roller file for polishing the tip 8 Base for fixing the bristles 9 Brush head center part 9a Spiral groove 9b Groove in the upper part of the brush head center part 9c Groove in the lower part of the brush head center part 9d Penetration of the brush head center part hole
10 Brush head upper part
10a Brush head upper part boss
11 Brush head lower part
11a Brush head lower part boss
11b Threads in the bottom part of the brush head
11c Stopper 1
11d metal rod
12 Top part of handle
12a Screw groove on top of handle part
12b Stopper 2
13 anti-slip grip
13a Non-slip grip with small protrusions
13b Non-slip grip with vertical grooves
13c non-slip grip with gentle curve
13d oval non-slip grip
14 Lower part of handle
15 integrated brush head
15a spiral groove
15b upper hole
15c bottom hole
15d Stopper 1
15e screw groove
15f part to wrap the brush hair
16 welding rods
17 Brush head guard
17a 2 rod-like projections
17b Groove inside the ring
18 Cushion material attached to two rod-like projections
19 Base parts
19a Groove for inserting rod-like projection
19b Protrusion for connection
19c Constriction
19d Groove inside the ring
20 Base part 2
20a Groove for inserting rod-like projection
20b Recess for connecting
20c opening and closing part
20d Groove inside the ring
20e clasp
21 2 rod-like protrusions
21a Protrusions for fixing two rod-like protuberances
100 Complete toothbrush
200 brush head guard 2

Claims (6)

This toothbrush is characterized in that bristles that are clamped and fixed by two wires and whose bristles are arranged in one direction are spirally arranged in the circumferential direction of the brush head. 2. The toothbrush according to claim 1, comprising said brush head and a handle, wherein said brush head and said handle are separable. 2. A rod-shaped protrusion extending in the direction of the brush head from between the brush head and the handle is provided on a diagonally opposite corner sandwiching the brush head in parallel with the brush head. 2. The toothbrush according to 2. 4. The toothbrush according to claim 3, wherein said protrusion rotates in the circumferential direction of said brush head. A spiral groove is provided in the circumferential direction of the central part of the brush head,
Fit the loop on one end of the wire that clamps the brush bristles to the boss of the upper part of the brush head,
Fitting the boss of the upper part of the brush head into the through hole of the upper part of the brush head,
Winding the wire holding and fixing the brush bristles along the groove,
fitting the other end of the wire into the through-hole at the bottom of the brush head;
Fitting the boss of the lower part of the brush head into the through-hole of the lower part of the brush head,
A method of manufacturing a toothbrush, comprising connecting the brush head and the upper part of the brush head, and further connecting the brush head and the lower part of the brush head. A spiral groove is provided in the circumferential direction of the brush head,
One end of the wire holding the brush bristles is fitted and fixed in a hole provided at one end of the spiral groove, and the wire is wound along the groove,
The other end of the wire is fitted into a hole provided at the other end of the spiral groove and fixed;
A method for manufacturing a toothbrush, wherein the hole provided at the one end and the hole provided at the other end are filled with resin.

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