JPH0819428A - Tooth brush - Google Patents

Abstract

PURPOSE:To inexpensively obtain an ion tooth brush and ordinary tooth brush by composing one electrode of a battery conductable with brush hairs and composing another electrode conductable with a conducting plate. CONSTITUTION:A head part 12 flocked with the brush hairs 10 and a handle part 16 in which the battery 14 is housed are integrated. A circular battery housing hole 18 is formed on the front surface of this handle part 16 and the battery 14 is housed therein. A supporting shaft 26 of a conductive material is disposed in a spring housing hole 22 in the central bottom of this battery housing hole 18. This supporting shaft 26 is connected to the one electrode of the battery 14 when the supporting 26 comes into contact with the bottom of the spring 24. The conducting plate 32 is mounted in the part where the battery 14 is housed tightly to the handle part 16. The exposed part of the supporting shaft 26 is confined only to the part of communicating grooves 30 near the brush hairs 10, by which the distance from the exposed part to the battery 14 is increased and the unnecessary infiltration of liquid into the ion tooth brush is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion toothbrush and a head portion in which a battery is housed in a handle portion of a toothbrush and a brushing effect is further improved by passing an electric current between the tooth and the bristles. Removable toothbrush. Further, the present invention relates to a battery tester that detects the effectiveness of the battery housed in the ion toothbrush.

[0002]

2. Description of the Related Art Conventionally, a battery is built in the handle of a toothbrush, and a weak current is passed between the tooth and the bristles through the hand that holds the handle, and plaque is generated by utilizing the potential gradient. Ion toothbrush and electronic toothbrush for effective removal (below,
Various "ion toothbrushes" have been proposed. This type of ion toothbrush has an extremely complicated structure as described in Japanese Utility Model Publication No. 43-5092 and Japanese Patent Application Laid-Open No. 60-253461 at the beginning of its development, and is therefore expensive. Therefore, it was difficult to spread.

Therefore, the applicant, as described in Japanese Patent Publication No. 63-1842, has a structure in which the brush head portion and the handle portion are detachable, and at that time, the brush bristles and one electrode of the battery are electrically connected. In order to achieve conduction, we have developed a conduction structure that uses a liquid such as saliva as a medium, and have succeeded in providing this type of ion toothbrush at a relatively low cost.

Japanese Patent Publication No. 6-11341 also introduces an ion toothbrush in which a brush head portion and a handle portion are detachable.

Further, Japanese Patent Publication No. 6-38859 discloses an ion toothbrush which has a simple structure and can achieve a low cost and a small size. This ion toothbrush includes a brush head portion, a handle portion, a cylindrical battery housed at the base end of the handle portion, and a terminal mounted on a part of the handle portion and connected to one electrode of the battery. And a conductive shaft that is embedded and extended in the axial direction of the handle portion, terminates near the brush bristles, and is connected to the other electrode of the battery,
And a terminal portion of the conductive shaft is connected to the vicinity of the brush bristles through a liquid passage.

[0006]

In recent years, the awareness of dental health has been raised, and the plaque removal effect of this kind of ion toothbrush has been reconfirmed in various fields such as the Dental Society. There is an increasing demand that the products have to be provided at a lower cost. Also,
There is also a need to provide an ion toothbrush that is easier to handle and easier to polish.

As a condition for satisfying this requirement, in the ion toothbrush in which the brush head portion and the handle portion are detachable, the brush head portion to be discarded and replaced should be as short and small as possible.

Further, both the ion toothbrush in which the brush head portion and the handle portion are detachable and the ion toothbrush in which the brush head portion and the handle portion are integrally formed are required to have a thin toothbrush neck portion. It It is also desirable to reduce the weight of ionic toothbrushes.

However, the above-mentioned conventional example has a problem that these requirements cannot be sufficiently satisfied.

Further, in the ion toothbrush described in Japanese Patent Publication No. 6-11341, it is considered that a liquid such as water or saliva may enter the inside of the toothbrush through a gap formed between the brush head portion and the handle portion. To be In this case, problems such as leakage of a battery housed in the handle and corrosion of electrodes are likely to occur.

Further, the ion toothbrush described in Japanese Patent Publication No. 6-38859 has a structure in which a battery is accommodated through a battery accommodating port formed at the base end of the handle portion. It is also possible that a liquid such as water may infiltrate from this part when it is set up. Further, in this ion toothbrush, since the battery is housed in the base end of the handle, a conductive shaft extending from the vicinity of the brush bristles to the vicinity of the base end of the handle is required. Therefore, there is room for improvement in reducing the material cost as well as increasing the weight of the entire toothbrush.

Also, in a normal toothbrush, it is also required that only the head portion on which the bristle bristles are implanted can be discarded and replaced so that the head portion is as short and small as possible.

Furthermore, since the battery tester for detecting the effectiveness of the battery housed in the ion toothbrush has a complicated structure and is expensive, it is rarely used in general households. Therefore, there is also a problem that an ion toothbrush which is not effective for the battery is used, or the ion toothbrush is discarded even though the battery is effective.

The present invention has an object to solve such a conventional problem, and is a cheaper ion toothbrush which can meet the demands of the market, a toothbrush and a battery housed in the ion toothbrush. An object of the present invention is to provide a battery tester that detects the effectiveness of the.

[0015]

In order to achieve such an object, the inventor of the present invention has completed the present invention by first considering the cost of manufacturing the ion toothbrush, especially the simplification of the manufacturing work. It was That is, the present invention comprises a head portion in which brush bristles are planted, and a handle portion accommodating a battery, one electrode of the battery is configured to be conductive with the brush bristles, and the other electrode of the battery is the handle An ion toothbrush configured to be conductive with a conductive plate mounted on at least a part of the outer surface of the conductive part, wherein the conductive plate is formed into a substantially U-shaped cross section, and the conductive plate is mounted on the outer surface of the handle part. The present invention provides an ion toothbrush in which an inclined portion is formed to guide the open edge of the conductive plate so as to enlarge it.

Here, the head part is a member separate from the handle part,
The handle may be removable. In this case, a support shaft made of a conductive material is projectingly provided on the handle portion, the support shaft is connected to the one electrode of the battery, and the head portion is provided with the support shaft when being attached to the handle portion. Is formed, and a liquid path that connects the brush bristles and the spindle insertion part and electrically connects the bristles and the spindle with a liquid as a medium. Is good. Furthermore, it is preferable that the rear end or the vicinity of the rear end of the support shaft insertion portion is configured to grip at least the front end portion or the vicinity of the front end portion of the received support shaft.

Further, a support shaft made of a conductive material and connected to one electrode of the battery is provided in the handle portion, and the head part is provided with the support shaft when being attached to the handle portion. A conductive member to be connected and a liquid path that connects between the brush bristles and the conductive member and electrically connects the bristles and the support shaft with a liquid as a medium may be formed. .

In the ion toothbrush according to the present invention, the head part and the handle part may be integrally formed.

Further, according to the present invention, a head portion in which brush bristles are implanted, a handle portion which is integrally formed with the head portion and accommodates a substantially disc-shaped battery, and at least a part of the handle portion is attached to an outer surface. An ion toothbrush in which one electrode of the battery is configured to be conductive with the brush bristles through a liquid and the other electrode is configured to be conductive to the conductive plate. It is a thing.

Further, one end portion is further connected to one electrode of the battery, and the other end portion is further provided with a conductive support shaft reaching the vicinity of the bristles of the head portion, and the other end portion of the conductive support shaft is provided. However, it can be configured to be able to conduct with the brush bristles through an electric path in which the liquid is at least partially interposed.

On one side surface of the body of the handle, at a position where the conductive plate is provided, a recess is formed in a direction perpendicular to the longitudinal axis of the handle, and the battery is housed in the recess. You can also

Further, the recess may be sealed in a watertight manner by interposing a seal member between the outer periphery of the recess and the back surface of the conductive plate.

Still further, the present invention provides a toothbrush having a head portion on which brush bristles are implanted, a handle portion gripped by a user, and a neck portion between the head portion and the handle portion,
The head portion provides a toothbrush which is detachably connected to the handle portion at the position of the neck portion.

Further, the present invention is a battery tester for detecting the effectiveness of a battery housed in an ion toothbrush, wherein a main body composed of a thin plate and a pair of terminal wires held by the main body are connected from a light emitting body. And a light emitting means extending substantially symmetrically, the light emitter is fixed to the main body, the pair of terminal wires are bent in the same direction, and the battery tester is configured to project outward from the main body. Is provided.

The thin plate material may be made of paper and / or synthetic resin. Further, the main body may be formed by folding and stacking thin plate materials or by stacking two thin plate materials on each other, and the light emitting means may be held between the stacked thin plate materials. Further, the one terminal wire is connected to a conductive member connected to one electrode of a battery housed in an ion toothbrush, and the other terminal wire is a conductive member connected to the other electrode of the battery. Can be connected with. Further, as the light emitting means, a commercially available light emitting diode can be used as it is.

[0026]

The conductive plate is formed in a substantially U-shaped cross section, and the handle has an inclined portion for guiding the open end of the conductive plate so as to expand when the conductive plate is attached. Even when the handle is mounted on the outer surface of the handle, it is not necessary for the worker to manually spread the open edge of the conductive plate to perform the mounting operation.
The conductive plate is mounted by simply pushing the conductive plate against the portion where the inclined portion is located. That is, the conductive plate is guided by the inclined portion and the open end is automatically enlarged, so that the conductive plate can be mounted on the outer surface of the handle portion.

By making the head portion detachable from the handle portion, only the head portion can be replaced when the brush bristles cannot be used. At this time, the support shaft insertion portion of the head portion is configured to grip at least the tip end portion or the vicinity of the tip end portion of the support shaft protruding from the handle portion, and the support shaft receives pressure acting on the head portion during brushing. Therefore, even if the head portion is attached to and detached from the handle portion with the neck portion narrowed, the integration of the head portion and the handle portion at the time of mounting is not impaired.

Further, by integrally forming the head portion and the handle portion, the exposed portion of the conductive support shaft can be provided only in the vicinity of the brush bristles of the head portion. Further, the gap into which water, saliva or the like enters can be formed only in this exposed portion. Therefore, the distance from the exposed portion to the battery can be increased, and the liquid is prevented from unnecessarily entering the inside of the toothbrush. Therefore, leakage of the battery and corrosion of the electrodes are suppressed. Further, since the neck portion can be formed by using the conductive spindle as the core material, the strength of this portion is improved. Therefore, the neck portion can be formed thin, and the brushing of the teeth is improved. Further, since the conductive support shaft itself can be made thin, the weight of the toothbrush is reduced and the material cost is reduced.

Furthermore, since the ion toothbrush having the head portion and the handle portion integrally formed may use a battery having an effect corresponding to the life of the brush bristles, the battery can be downsized and It is possible to reduce the cost of the battery itself and save resources.

By forming a recess in a direction perpendicular to the longitudinal axis of the handle on one side surface of the trunk of the handle at the position where the conductive plate is provided, the diameter of the handle becomes large. In addition, the position of the conductive plate is not limited by the battery. Further, by inserting a seal member between the outer periphery of the recess and the back surface of the conductive plate, the battery does not come into contact with the liquid.

Further, the battery tester is composed of the main body made of a thin plate and the light emitting means held by the main body, and the main body holds the light emitting body and the pair of terminal wires extending from the light emitting body. It is possible to provide a battery tester with an extremely simple structure and at low cost.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

First, FIGS. 1 to 3 show a first embodiment of the present invention. In this embodiment, the head portion 12 in which the brush bristles 10 are implanted and the handle portion 1 in which the battery 14 is housed
6 and 6 are integrally configured. Head part 12 of handle 16
The near position is formed relatively wide, and a circular battery housing hole 18 for housing the battery 14 is formed on this surface. The battery housing hole 18 is formed in a direction orthogonal to the longitudinal axis of the handle 12.

A disk-shaped battery 14, for example, a lithium battery is housed in the battery housing hole 18. Battery storage hole 1
A spring accommodating hole 22 having a relatively small diameter is continuously formed in the central bottom portion of the battery 8, and in this spring accommodating hole 22, for example, a coil spring, a swirl spring, or another spring 24 is provided.
It is stored in a state of being in contact with one of the electrodes. A support shaft 26 made of a conductive material so as to be exposed in the spring accommodating hole 22.
The support shaft 26 is connected to one electrode of the battery 14 by contacting the support shaft 26 with the bottom of the spring 24.

The support shaft 26 extends axially in the handle portion 16 toward the head portion 12, and terminates at a position immediately before the brush bristles 10 of the head portion 12 via a narrow neck portion 28. Reference numeral 30 is a communication groove, through which a part of the tip of the support shaft 26 is exposed on the surface of the head portion 12 having the brush bristles 10.

In particular, as shown in FIG. 3, a conductive plate 32 made of a conductive material is densely attached to the handle 16 in the portion where the battery 14 is housed. That is, the conductive plate 32 having a U-shaped cross section is attached to the handle 16 in a state of being in contact with the other electrode on the upper surface of the battery 14 via the constricted portion 33. In order to seal the battery 14 from the outside in a watertight manner, a groove 34 is formed around the battery housing hole 18, and an O-ring 36 for sealing is provided between the groove 34 and the inner surface of the conductive plate 32. . In the conductive plate 32, open ends having a substantially U-shaped cross section are bent inwardly to form bent parts 38, and these bent parts 38 are elastically fitted in locking grooves 40 formed in the bottom part of the handle part 16. The conductive plate 32 is prevented from coming off from the handle portion by being engaged with each other spontaneously.

Further, inclined portions 42 are formed symmetrically on both side surfaces of the handle portion 16 at this position, and the inclined portion 42 has an inclined slope that gradually expands from the upper surface to the lower surface of the handle portion. are doing. Therefore, the width of the upper surface of the handle portion 16 at this position is relatively small, and for example, the pair of bent portions 3 at least at the open edge of the conductive plate 32.
It is almost the same as the width between eight.

As is well known, the function of the ion toothbrush having the above-described structure is that the handle portion 1 is touched by touching the conductive plate 32.
When 6 is gripped and the teeth are brushed with the brush bristles 10, the brush bristles 10 are wetted by a liquid such as saliva, and the support shaft 26 is brought into an electrically conductive state through a path of the liquid including the communication groove 30. Become. As a result, a current flows from the battery 14 through the human hand, body, teeth, liquid path including the bristles 10, the communication groove 30, the support shaft 26, and the battery 14, and the potential gradient causes the effect of removing plaque during brushing. Will increase.

In the manufacturing process of this ion toothbrush, the attachment of the conductive plate 32 to the handle 16 has heretofore been an extremely complicated and force-consuming operation. That is, as shown in FIG. 15 which is a sectional view of the conventional ion toothbrush at the same position as FIG. 3, the handle 16 has a substantially rectangular cross section, and therefore, when the conductive plate 32 is attached, the open edge It was necessary to expand the bent portion 38 of the above to more than the width of the handle 16, and the conductive plate 32 had to be attached to the handle while maintaining the expanded state. However, according to the above-described embodiment, since the inclined portions 42 are formed on both side surfaces of the handle portion, the operator does not have to manually spread the conductive plate 32,
It suffices to just push in from the open edge toward the handle 16 in the state of being molded. As a result, when the bent portion 38 is provided as in the above-described embodiment, the bent portion 38 smoothly passes through the width on the upper surface of the handle portion and then reaches the inclined portion 42. When the conductive plate 32 is further pushed in this state, the open end edge is expanded along the inclined portion 42, and then the bent portion 38 is elastically bent into the groove by passing over the corner portion on the bottom side of the handle portion. It is fitted in 40 and the mounting work is completed. Therefore, it is possible to automate the work of mounting the conductive plate 32. Therefore, it is possible to further reduce the manufacturing cost of the ion toothbrush.

Further, since the head portion 12 and the handle portion 16 are integrally formed, the exposed portion of the support shaft 26 can be limited to the vicinity of the brush bristles 10 (only the communicating groove 30 portion). Therefore, the distance from the exposed portion to the battery 14 can be increased, and the liquid can be prevented from unnecessarily entering the ion toothbrush. As a result, leakage of the battery 14 and corrosion of the electrodes can be suppressed.

Further, in this embodiment, since the neck portion 28 can be formed with the support shaft 26 as the core material, the strength of this portion can be improved. As a result, the neck portion 28 can be thinly formed, and the ease of brushing the teeth can be improved. Further, since the support shaft 26 itself can be made thin, the weight of the ion toothbrush can be reduced and the material cost can be reduced.

In this embodiment, the conductive plate 32 is attached to the outer surface of the central portion of the ion toothbrush in the longitudinal direction, and the battery 14 is internally provided at a position facing the conductive plate 32, so that the handle 16 is gripped. At this time, the conductive plate 32 can be naturally touched without any discomfort. Further, since the length of the support shaft 26 can be shortened, the weight of the ion toothbrush can be reduced.

Further, in this embodiment, only the head portion 12 is not discarded and replaced. Therefore, the life of the battery 14 may be adjusted to the time the brush bristles 10 can withstand use. Therefore, the battery 14 can be downsized. This also makes it possible to provide an inexpensive and lightweight ion toothbrush.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the head portion 120 is a member separate from the handle portion 160 and is detachably attached to the handle portion 160.
Only 20 can be discarded and replaced. In this embodiment, the same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, the head portion 120 and the handle portion 1
As compared with the conventional ion toothbrush, the separation position from 60 is located closer to the head portion 120, that is, the neck portion 28 narrowed, whereby the head portion 120 is
It is smaller than the conventional one.

As shown in FIGS. 8 to 11, in particular, the head portion 120 has a bristle-implanted portion 46 on which the brush bristles 10 are planted, and a shank portion 48 integrally extending from the bristle-implanted portion 46.
It consists of and. As described above, the shank portion 48 is formed to be extremely short as compared with the conventional one. A first hole 50 and a second hole 52 having a diameter smaller than that of the first hole 50 are formed from the shank end portion in the axial direction of the shank portion 48, and the spindle insertion portion is formed by these holes. Has been done.

The upper portion of the shank portion 48, that is, the bristle 1
The part on the side where 0 exists is from the shank end to the brush bristles 10
Is slit in the axial direction to a position close to
The slit-shaped cutout forms the communication groove 30 as a part of the liquid path described above.

Reference numeral 54 denotes a bank portion, of the support shaft insertion portion whose upper side is opened by the communication groove 30, only the rear end portion of the support shaft insertion portion is not opened, and the tip end portion of the support shaft, which will be described later, is set at this bank portion. It can be grasped with.

Reference numeral 56 is an engagement groove for preventing rotation, which receives an engagement protrusion on the handle side which will be described later. Further, a pair of locking recesses 58 are formed on a part of the inner wall of the communication groove 30 so that they can be elastically fitted with locking projections on the handle side, which will be described later.

As shown in FIGS. 12 to 14, the support shaft 26 projects axially from the end surface of the handle 160. More specifically, from the end face of the handle 160, the support shaft 26
And a pair of locking protrusions 60 on the upper side surface thereof.
An extension 62 having a predetermined length, and the extension 62
Further, the support shaft 26 is exposed and extends from the end surface of the device for a relatively short distance. The extension portion 62 is the first portion of the head portion 12.
Of the supporting shaft 26, and the protruding support shaft 26 is inserted into the second hole 52 up to its bottom portion.
The locking projection 60 elastically locks with the locking recess 58 (see FIG. 4), so that the head portion 120 does not easily come off from the handle in the axial direction. That is, this structure enables the head portion 120 to be connected to the handle portion in the axial direction with one touch, and after the connection is completed, the head portion 120 is axially moved from the handle portion 160 unless a certain force or more is applied. An axial coupling structure is provided that prevents the disconnection.
Further, since this structure is formed by utilizing the upper side surface of the extension portion 62, the narrowed neck portion can be maintained as it is without increasing the width or thickness of the portion.

Reference numeral 64 in FIG. 13 indicates the head portion 120.
An engaging protrusion that is fitted in the engaging groove 56 of the above is provided, and a detent structure is provided in which the head portion 120 is detented with respect to the handle portion 160 due to the engaging relationship between the engaging protrusions. This structure is provided on the opposite side (lower side) to the support shaft 26 from the axial coupling structure, and prevents the neck portion from becoming thick. Also,
The structure in which the tip portion of the support shaft 26 is securely gripped by the support shaft insertion portion due to the presence of the bank portion 54 particularly functions as a brush pressure support structure, and the pressure acting on the head portion 120 during brushing is applied to the support shaft tip portion. Is what you receive in.

In this way, the locking recess 58 and the locking projection 60 are provided.
Based on the axial coupling structure based on the locking relationship of the above, the rotation stopping structure based on the engaging relationship between the engaging groove 56 and the engaging projection 64, and the brush pressure supporting structure between the tip of the support shaft and the bank portion 54,
Even if the head portion 120 is attached to and detached from the handle portion 160 with a neck portion that is narrowly constricted, it is not necessary to make the neck portion thick, and the head portion 120 is securely and highly rigidly connected to the handle portion, and the head portion is used during use. The part 120 does not fall off. Particularly, in this embodiment, since the length of the supporting shaft 26 that actually projects is extremely short, even if the supporting shaft 26 has a small diameter, the strength is not impaired from the viewpoint of material cost reduction.

FIG. 6 is a sectional view taken along line VI-VI in FIG. In this embodiment, the inclined portions 42 provided on the side surfaces of the handle 160 are provided only at the four corners when viewed from above as shown in FIG. This is because the width of the entire handle 160 is wide because it is necessary to avoid the battery 14 and the O-ring 36 when the inclined portion 42 is provided on both sides of the handle without interruption as in the first embodiment. Inevitably, in order to prevent this, it is not necessary to widen the width of the handle 160 by avoiding the most protruding portion of the battery in the width direction and forming the inclined portions 42 only at the four corners. Because. Therefore, as shown in FIG. 7, the conductive plate 32 has a notch 39 formed in the center of the side surface. Therefore, when the conductive plate 32 is mounted, the notch 39 is formed as shown in FIG.
It ends in the middle of the side surface of 60. Also in this embodiment, in order to mount the conductive plate 32, it is not necessary to manually open the open edge, and the conductive plate 32 may be simply pushed into a predetermined position. As a result, the bent portion 3 extending like a foot
8 is guided by each inclined portion 42 and spreads, and the mounting is completed.

4 and 5, reference numeral 70 is a hole for inserting a pin (not shown) for fixing the support shaft 26 to the handle 160 at a predetermined position when the handle 160 is molded. Since the support shaft 26 is exposed to the outside through the hole 70, it is used as a hole for inserting the terminal wire of the battery tester as described later.

Next, FIGS. 16 and 17 show a third embodiment of the present invention. In this embodiment, the second embodiment forms the communication groove 30 in a slit shape up to the shank end portion, and the axial direction The engaging recesses 58 as a connecting structure are provided on both side surfaces of the communicating groove 30, whereas the connecting groove 30 is independent of the axial connecting structure. That is, the communication groove 30 and the slit portion 49 having the locking concave portion 58 are the same as the head portion 12.
It is separated by Sekibu 31 which is integrated with 0. In this embodiment, the above-mentioned brush pressure support structure is constituted by the engagement relationship between the barrier portion 31 and the support shaft 26. Therefore, the bank portion 54 of the second embodiment is not always necessary.

FIG. 18 shows a fourth embodiment of the present invention. In this embodiment, the support shaft 26 does not project from the end surface of the handle 160, but ends at a position recessed from the end surface. A groove 128 is formed on the end surface of the handle 160, the groove 128 opening to the tip of the support shaft 26.

In the vicinity of the brush bristles 10 of the head portion 120,
As shown in FIG. 18, a conductive plate 127 having a U-shaped cross section is mounted in a state where both open ends thereof are inserted into the grooves 130 and 131 and exposed on the brush-implanted surface side. A shaft hole 132, which communicates with the groove 131, extends in the longitudinal direction of the head part 120 and penetrates to the end face of the head part 120. One end of the shaft hole 132 is fixed to the conductive plate 127 by appropriate means. , A spring 1 whose other end is made of a conductive material and extends from the end surface of the head portion 120.
26 has been inserted. The spring 126 is fixed to and electrically connected to the conductive plate 127 via the communicating portion between the groove 131 and the shaft hole 132. Further, the length of the portion of the spring 126 extending from the end surface of the head portion 120 is configured to be longer than the depth of the groove 128 formed in the handle portion 160.

The head portion 120 having this structure is attached to the handle portion 1
When it is mounted on the head 60, the tip of the spring 126 extending from the end surface of the head portion 120 is inserted into the groove 128 formed on the end surface of the handle portion 160. By doing so, the support shaft 16 is electrically and surely connected to the conductive plate 127 by the bias of the spring 126.

Next, FIG. 19 and FIG. 20 show the fifth embodiment of the present invention.
An embodiment is shown, which is the head unit 1 shown in the second embodiment.
The structure for attaching and detaching the head 20 and the neck 28 of the handle 160 is also applied to an ordinary toothbrush so that only a small head portion can be discarded and replaced to prevent waste of resources. In this embodiment, the same or corresponding parts as those of the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. That is, the support shaft 2
6 is preferably made of a material having a rigidity higher than that of the synthetic resin forming the handle 160, for example, a metal, but it is not necessary to exhibit a conductive function, and here it is simply used as a shaft for supporting the head 120. Function. Further, the vicinity of the tip of the support shaft 26 is exposed to the outside by the communication groove 30, but this communication groove 30 exists to provide the necessary elasticity of the locking recess 58 which is the axial coupling structure. It does not function as a part of the liquid path as in the second embodiment.

21 and 22 show a sixth embodiment which is a further modification of the fifth embodiment of the ordinary toothbrush. In the fifth embodiment, the support shaft 26 is made of metal or the like, and is projected from the handle as an integral part of the handle. In this case, since the support shaft 26 usually has a lower rigidity than metal, it is made thicker than the support shaft 26 of the fourth embodiment to provide sufficient rigidity.

23 to 25, the battery 1 in the ion toothbrush shown in the second, third or fourth embodiment is shown.
A battery tester for determining the effectiveness of 4 is shown. This battery tester has a main body made of a thin plate material, for example, paper or synthetic resin which is relatively rigid, and the thin plate material is formed in a rectangular shape as shown in FIG. The main body 80 is configured so as to be bent and superposed at its central portion, and a pair of holes 82 are formed on the bending line. Further, a hollow hole 84 having a substantially semicircular diameter is formed symmetrically with respect to the bending line.

A commercially available light emitting diode can be used as the light emitting means. The ion toothbrush according to the present invention does not need to be subjected to a treatment such as adding another member in order to extend the terminal wire of a commercially available light emitting diode.

In the light emitting diode, a pair of terminal lines 88 usually extend from the light emitting body 86 in a substantially symmetrical manner. When using,
Each terminal wire 88 is bent as shown in FIG. 24, and the main body 80 is folded with the terminal wires 88 inserted in the holes 82.
6 is accommodated in the void formed by the pair of hollowed holes 84 being aligned. The superposed main body 80 is adhered by an appropriate means such as an adhesive applied beforehand. When judging the effectiveness of the battery, as shown in FIG. 23, one of the terminal wires 88 protruding from the main body is inserted into the hole 70 formed in the handle 160 and the other terminal wire 88 is inserted. The bent portion 3 positioned so as to be wound around the bottom of the conductive plate 32.
All you have to do is touch the 8. As a result, when the battery is effective, the light emitting body 86 emits light and the effectiveness can be confirmed. Also, in order to explain the method of this work to the user, it is necessary to write a picture as shown in FIG. 23 on the surface of the main body 80, and especially to know that the positive and negative poles of the terminal wires must be in contact with predetermined positions. It is good to tighten.

26 to 28 show a modification of the battery tester. The main body 80 is configured by fitting a lid 92, which is a separate member, into a rectangular recess 91 on the surface of the base 90 and adhering the lid 92. The base 90 has a light emitter 86.
A hollow hole 84 and a groove 94 through which the terminal wire 88 extends are formed, and the lid portion 92 also has a hollow hole 8 for the light emitter 86.
4 'is formed. Both the base 90 and the lid 92 may be made of paper or synthetic resin, or one of them may be made of paper and the other may be made of synthetic resin. Further, the material is not limited to paper and synthetic resin, and may be a thin plate material that can be obtained at low cost.

[0065]

As described above, according to the present invention,
There is an excellent effect that an ion toothbrush and an ordinary toothbrush can be provided at an extremely low cost, and thus, it is possible to meet the market demand and contribute to the health of human teeth.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of an ion toothbrush according to the present invention.

2 is a cutaway side view of FIG. 1. FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is an enlarged cutaway plan view of an essential part showing a second embodiment of the present invention.

5 is a cutaway side view of a main part of FIG. 4. FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a perspective view of a conductive plate used in the embodiment.

FIG. 8 is a plan view of the head portion of the embodiment.

FIG. 9 is a cutaway side view of the head portion of the embodiment.

10 is a cross-sectional view taken along line XX of FIG.

11 is a cross-sectional view taken along the line XI-XI of FIG.

FIG. 12 is a plan view showing a tip portion of a handle used in the embodiment.

FIG. 13 is a side view showing a tip portion of a handle used in the embodiment.

FIG. 14 is a side view of FIG.

FIG. 15 is a sectional view of the conventional ion toothbrush at the same position as in FIG.

FIG. 16 is a front view of a main portion showing a third embodiment of the present invention.

FIG. 17 is a side view of a notched part of FIG.

FIG. 18 is a cutaway side view of a main part showing a fourth embodiment of the present invention.

FIG. 19 is a front view of a main portion showing a fifth embodiment of the present invention.

20 is a front view of a notched part of FIG.

FIG. 21 is a front view of a main portion showing a sixth embodiment of the present invention.

FIG. 22 is a side view of a notched part of FIG. 21.

FIG. 23 is a front view showing an embodiment of the battery tester of the present invention.

FIG. 24 is a sectional view showing an embodiment of the battery tester of the present invention.

FIG. 25 is a development view showing an embodiment of the battery tester of the present invention.

FIG. 26 is a front view showing a modified example of the battery tester, showing the main body base portion and the light emitting means.

FIG. 27 is a cross-sectional view of the tester.

FIG. 28 is a front view of the tester.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Brush bristles 12 Head part 14 Battery 16 Handle part 26 Spindle 30 Communication groove 32 Conductive plate 38 Bending part 42 Inclined part 80 Tester main body 86 Light emitting body 88 Terminal wire 120 Head part 160 Handle part

Claims (19)

[Claims] 1. A head portion in which brush bristles are implanted, a handle portion accommodating a battery, a conductive plate formed in a substantially U-shaped cross section and attached to at least a part of an outer surface of the handle portion, and a handle. An inclined portion which is formed on the outer surface of the portion and which guides the open end of the conductive plate so as to expand when the conductive plate is attached,
An ion toothbrush in which one electrode of the battery is configured to be conductive with the bristles and the other electrode is configured to be conductive to the conductive plate. 2. The conductive plate has, at an open end thereof, a locking portion projecting inward for gripping the handle portion when the conductive plate is completely attached, and the locking portion has an inclination of the handle portion. The ion toothbrush according to claim 1, wherein the ion toothbrush is guided along the portion to expand the open edge of the conductive plate. 3. The battery is housed in a recess formed on one surface of the handle, and a conductive plate is mounted so as to cover the battery while contacting the other electrode of the battery. The described ion toothbrush. 4. The inclined portion is arranged at substantially four corners of one surface of the handle portion in which the recess is formed, and the conductive plate has the locking portion at portions corresponding to the inclined portions at the four corners. The ion toothbrush according to claim 3, which has. 5. The ion toothbrush according to any one of claims 1 to 4, wherein the head portion is configured to be detachable from the handle portion. 6. A support shaft, which is made of a conductive material and is connected to one electrode of the battery, projects from the handle, and the head supports the support shaft when mounted on the handle. A support shaft insertion portion to be received and a liquid passage that connects the bristles and the support shaft insertion portion and electrically connects the bristles and the support shaft with a liquid as a medium are formed. The ion toothbrush according to claim 5. 7. The ion toothbrush according to claim 6, wherein the rear end or the vicinity of the rear end of the support shaft insertion portion is configured to grip at least the front end portion or the vicinity of the front end portion of the received support shaft. 8. The shaft portion is provided with a support shaft made of a conductive material and connected to one electrode of the battery, and the head portion is connected to the support shaft when mounted on the handle portion. 6. A conductive member that forms a brush, and a liquid path that connects the brush bristles and the conductive member and electrically connects the bristles and the support shaft with a liquid as a medium are formed. The described ion toothbrush. 9. The ion toothbrush according to claim 1, wherein the head portion and the handle portion are integrally formed. 10. A head portion in which brush bristles are implanted, a handle portion which is integrally formed with the head portion and accommodates a substantially disc-shaped battery, and a conductive member which is attached to at least a part of an outer surface of the handle portion. An ion toothbrush having a plate, wherein one electrode of the battery is configured to be conductive with the brush bristles through a liquid, and the other electrode is configured to be conductive to the conductive plate. 11. An electrically conductive support shaft, one end of which is connected to one electrode of the battery, and the other end of which is near the brush bristles of the head portion, the other end of the conductive support shaft. But,
The ionic toothbrush according to claim 10, wherein the ionic toothbrush is configured to be electrically conductive with the bristles via an electric passage having a liquid interposed at least in a part thereof. 12. A recess in a direction orthogonal to the longitudinal axis of the handle is formed on one side surface of the trunk of the handle at a position where the conductive plate is provided, and a battery is provided in the recess. The ion toothbrush according to claim 10 or 11, which is stored. 13. The ion toothbrush according to claim 12, wherein the recess is watertightly sealed by a seal member interposed between the outer periphery of the recess and the back surface of the conductive plate. 14. A head part having brush bristles implanted, a handle part gripped by a user, and a neck part between the head part and the handle part, wherein the head part is provided with respect to the handle part. A toothbrush detachably connected at the position of the neck portion. 15. A main body made of a thin plate material, and a light-emitting means held by the main body and having a pair of terminal wires extending substantially symmetrically from the light-emitting body, the light-emitting body being fixed to the main body, A battery tester that detects the effectiveness of a battery housed in an ion toothbrush configured such that the pair of terminal wires are bent in the same direction and project outward from the main body. 16. The battery tester according to claim 15, wherein the thin plate member is made of paper and / or synthetic resin. 17. The main body is configured by folding and stacking thin plate materials, or by stacking two thin plate materials on each other, and the light emitting means is held between the stacked thin plate materials. Item 16. A battery tester according to item 16. 18. The one terminal wire is connected to a conductive member connected to one electrode of a battery housed in an ion toothbrush, and the other terminal wire is connected to the other electrode of the battery. The battery tester according to any one of claims 15 to 17, which is connected to a conductive member. 19. The battery tester according to claim 15, wherein a commercially available light emitting diode can be used as the light emitting means without adding any other member.