JP5946154B2 - Brush and brush body - Google Patents

Description

  The present invention relates to a brush including a brush body that is rotatable with respect to a gripping portion.

  The brushes disclosed in Patent Documents 1 and 2 (hereinafter referred to as “first conventional brush” and “second conventional brush”, respectively) are toothbrushes each having a substantially spherical brush body. The brush body is driven by a motor and is configured to rotate independently around each of the two axes. The brush disclosed in Patent Document 3 (hereinafter referred to as “third conventional brush”) is also a toothbrush, and includes a brush body that rotates integrally with a handle and a rotating shaft protruding from the handle. It is configured to perform axial reciprocating linear motion and reciprocating rocking around the axis. The brush disclosed in Patent Document 4 (hereinafter referred to as “fourth conventional brush”) is a torque limiter for causing the swing to decay when a high load is applied to the brush body that swings by driving a motor. It is a toothbrush provided with. The brush disclosed in Patent Document 5 (hereinafter referred to as “fifth conventional brush”) includes a roller-like brush body supported so as to be reciprocally rotatable in the axial direction of the handle, and the brush body is brought into contact with teeth or the like. It is a toothbrush comprised so that it might polish in the state where it was made to reciprocate in the axial direction, and to roll while contacting. The brush disclosed in Patent Document 6 (hereinafter referred to as “sixth conventional brush”) is a toothbrush including a cylindrical brush body provided concentrically at the tip of a handle, and the handle of the handle by a user is provided. The brush body is rotated by rotating around the axis to brush the teeth. Patent Document 7 includes a spherical brush body (hereinafter referred to as “sixth conventional brush”) fixed to the tip of a handle, and is configured to brush teeth and the like by the movement of the handle by the user. A toothbrush is disclosed.

Special table 2010-523239 Special table 2013-507162 Japanese Unexamined Patent Publication No. 7-11604 Japanese Patent Laid-Open No. 06-123343 Japanese Patent No. 4040754 Japanese Patent No. 3646118 JP 2001-238729 A

  However, although the first conventional brush and the second conventional brush rotate independently around each of the two axes, each rotation is forcibly driven by a motor. Naturally, the tip of the bristle of the brush body moves in the direction opposite to the above. In addition, since the surface of the teeth and gums is uneven and there are grooves and gaps that are sufficiently deep compared to the length of the brush hair, the brush body can be applied to the teeth and gums so that the tip of the brush hair reaches the details. You have to press hard. When the rotating brush body is pressed strongly, there is a higher risk of damaging teeth, gums and the like. In particular, when brushing around the periodontal pocket formed between the teeth and the gingiva, the possibility of damaging the gingiva is extremely high when the brush body rotates in the direction of peeling the gingiva from the tooth. This problem can also occur with the third conventional brush. In the third conventional brush, since the handle performs the axial reciprocating linear motion and the reciprocating rocking around the axis, the user is required to be more concerned about teeth and gums. Since the fourth conventional brush has a torque limiter, the brush body can be made to oscillate when an overload is applied to the brush body as a result of being strongly pressed against the tooth or the like. It is expected to prevent damage. However, it is a technique that can be used only to reduce the oscillation. Since the brush body of the fifth brush is in the form of a roller, it is difficult to be damaged in the rolling direction, but if the brush body is moved in a direction intersecting the rolling direction (axial direction of the roller), the rolling is prevented. There is a high risk of damaging teeth and gums. For the same reason, if the brush body of the sixth conventional brush is moved in the axial direction, teeth and gums may be damaged. The seventh conventional brush is good when the handle is rotated about its axis, but there is a high risk of damaging teeth and gums when brushing in the axial direction of the handle.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a brush that can be efficiently polished or brushed without damaging the contact portion.

  In order to achieve the above object, the present invention comprises the following arrangement. It should be noted that the definitions of terms used to describe the invention described in any claim are applicable to the invention described in other claims, regardless of the description order, etc. And

(Characteristics of the invention of claim 1)
The brush according to the first aspect of the present invention (hereinafter, appropriately referred to as “the brush of the first aspect”) includes a gripping part for a user to grip and a brush body support part provided on one end side in the longitudinal direction of the gripping part. And a brush body supported by the brush body support portion . Here, each of the brush bodies is configured such that when the user moves the grip portion, the brush body can rotate and rotate in at least two kinds of directions independent from each other by friction received from a contact portion. It is characterized by that.

(Characteristics of the invention described in claim 2)
The brush according to the invention of claim 2 (hereinafter referred to as “the brush of claim 2” as appropriate) is a preferred embodiment of the brush of claim 1, wherein the brush body support portion is a substantially U-shaped U-shape support portion. the provided, one by one the brush bodies on each of both the upper end of the U-shaped support portion you characterized in that it is supported.

(Characteristics of Claim 3)
The brush according to the invention of claim 3 (hereinafter referred to as “the brush of claim 3” as appropriate) bows as a preferred embodiment of the brush of claim 2 while being sandwiched between the U-shaped support portions. end you and tilting portion hinged, one and the brush body which is supported on the other end of the tilting part, comprising a.

(Feature of the invention of claim 4)
A brush according to the invention of claim 4 (hereinafter referred to as "the brush of claim 4" as appropriate) is a preferred embodiment of the brush of claim 3, wherein the tilting portion has a desired angle with respect to the U-shaped support portion. in you, characterized in that it is semi fixably configuration.

(Feature of the invention of claim 5)
A brush according to a fifth aspect of the invention (hereinafter referred to as “the brush of the fifth aspect” as appropriate) includes a brush body supported by the tilting portion and a U-shape as a preferred aspect of the brush according to the third or fourth aspect. The two brush bodies supported by the support part form a triangular relationship on the same plane.
It is characterized by that.

(Characteristics of the invention described in claim 6)
Brush according to the invention of claim 6 wherein (hereinafter, appropriately referred to as "brush of claim 6") is a preferred embodiment of any of the brushes claims 1 to 5, wherein the brush body support section, bidirectional around the axis Provided with respect to the grip portion so as to be rotatable, and in the grip portion, a motor having a motor shaft, a power source for supplying electric power to the motor, and a rotational motion of the motor shaft in the brush body support portion And a torque limiter for transmitting to the motor.

(Feature of the invention of claim 7)
The brush according to the invention of claim 7 (hereinafter, appropriately referred to as “the brush of claim 7 ”), as a preferred aspect of the brush of claim 6, is further characterized in that the grip portion and the brush body support portion further include the grip portion. provided to be retractable relative to the torque limiter, characterized in that it is configured to be transmitted to the brush body support section also infested movement with respect to the gripper.

(Characteristics of the invention described in claim 8)
A brush according to an eighth aspect of the present invention (hereinafter appropriately referred to as “the brush of the eighth aspect”) is a preferred embodiment of the brush according to the seventh aspect, wherein the torque limiter is integrally rotated with the brush body support portion. A motor-side limiter member that rotates integrally with the motor shaft of the motor, a cam structure formed between the shaft-side limiter member and the motor-side limiter member, and the shaft-side limiter member that is connected to the motor-side limiter. The cam structure includes at least one shaft-side protrusion protruding from the shaft-side limiter member toward the motor-side limiter member, and the shaft from the motor-side limiter member. At least one motor-side protrusion protruding toward the side limiter member, the motor-side protrusion being a rotation of the motor-side limiter member Accordingly, while continuously engaging with the shaft-side protrusion and transmitting the rotational movement of the motor-side limiter member to the shaft-side limiter member, the engagement position with the shaft-side protrusion is slid and moved. The motor on the shaft-side protrusion so as to ride on the motor-side protrusion while resisting the spring force of the spring, and eventually pass over to transmit the rotational motion and the retracting motion to the brush body support portion. Riding over and over the side protrusion is configured to be performed even when the brush body support portion does not rotate due to overload.
It shall be the features a.

(Feature of the invention of claim 9)
The brush according to the ninth aspect of the invention (hereinafter referred to as “the brush of the ninth aspect ” is a preferred embodiment of the brush according to the sixth to eighth aspects of the present invention. In this case, the brush body support portion is configured to be able to rotate and rotate in both directions by friction received from the contact portion .

(Features of the invention of claim 10)
  The brush according to the invention described in claim 10 (hereinafter, the “brush of claim 10” as appropriate) is a toothbrush as a preferred embodiment of the brush according to any one of claims 1 to 9.

(Characteristics of Invention of Claim 11)
  The brush according to the invention described in claim 11 (hereinafter, the “brush of claim 10” is suitably a brush for massage of a human body or an animal body as a preferred embodiment of the brush according to any one of claims 1 to 9). Features.

(Characteristic of Claim 12)
  A brush body according to a twelfth aspect of the present invention is a brush body that can be used for the brush according to any one of the first to eleventh aspects.

  According to the present invention, it is possible to provide a brush and a brush body that can be efficiently polished or brushed without damaging the contact portion.

It is a perspective view of the manual toothbrush which concerns on 1st Embodiment. It is a disassembled perspective view around a brush body. It is a perspective view of the brush body attached to the 1st rotating shaft. It is a perspective view which shows the brush body of use condition. It is a perspective view which shows the modification of a toothbrush. It is a development perspective view of an electric brush. It is a perspective view of the electric toothbrush holding part which abbreviate | omitted one side of the holding part structural piece. It is a perspective view of the electric toothbrush holding part which abbreviate | omitted one side of the holding part structural piece. It is the schematic for demonstrating the effect | action of a torque limiter. It is a perspective view which shows the use condition of the brush which concerns on 2nd Embodiment.

  A mode for carrying out the invention (hereinafter referred to as “property“ first embodiment ”) will be described with reference to the drawings. The brush according to the present invention can be used for a wide range of applications such as toothbrushes, brushes for human and animal bodies, and polishing, application, and leveling. In the first embodiment, toothbrushes are targeted. Here, the toothbrush in this specification refers to a contact part (hereinafter referred to as “tooth etc.”) mainly in the oral cavity of a human (including animals) such as tongue and mucous membrane in addition to teeth and gums. It is a general term for those equipped with a brush body for brushing or brushing by a combination of manual and automatic. The toothbrush according to the first embodiment is divided into two forms. One is a manual toothbrush and the other is an electric toothbrush. Below, it demonstrates in order of a manual toothbrush and an electric toothbrush.

(Schematic structure of toothbrush)
A schematic structure of a manual toothbrush 1 will be described with reference to FIG. The toothbrush 1 includes a grip portion 3, a rotation support mechanism 5, and a brush body 21. Although the toothbrush 1 is for brushing the intraoral site | part of a human, for example, it does not prevent using it as what polishes the intraoral site | part of a domestic animal.

(Configuration of gripping part)
The grip portion 3 is a portion for gripping when the user brushes his / her teeth, and is an elongated member having one end side 3a and the other end side 3b. A rotation support mechanism 5 is provided on the one end 3a side of the grip portion 3, and the other end side 3b is an open end. The grip portion 3 is preferably made of a synthetic resin material. Although there is no restriction | limiting in the raw material which comprises the holding part 3, By using a synthetic resin material, it can reduce in weight compared with a metal etc., does not deteriorate by washing | cleaning, and can select various colors and shapes. Because it can. The grip portion 3 of the first embodiment is formed in a cylindrical shape, but may be a prismatic shape or a shape that can be brushed by the user. The shape and form can be freely selected. The grip portion 3 is characterized by an internal structure in relation to the rotation support mechanism 5 described below. In addition, the holding part 3 is comprised so that it may be divided into two of the holding part component pieces 4a and 4b on the boundary of the virtual plane which passes along a central axis.

(Structure of rotation support mechanism)
As shown in FIGS. 1 and 2, the rotation support mechanism 5 includes a grip portion internal mechanism 7 that is inside the grip portion 3 on the one end 3 a side, and a grip portion external mechanism 9 that is also outside. For convenience of explanation, the gripping part outside mechanism 9 will be described first. The holding part outer mechanism 9 includes a first rotating shaft 11 protruding in the longitudinal direction (axial direction) from one end 3a of the holding part, and a short holding bearing (crossing the first rotating shaft 11 at the open end of the first rotating shaft 11). (Holding mechanism) 13 (FIG. 2) and a second rotating shaft 15 that penetrates the inside of the holding bearing 13 and exposes both ends (FIG. 2). The holding bearing 13 includes an upwardly open C-shaped bearing main body 13a provided on the first rotating shaft 11, and a closing member 13b formed to be detachable from the bearing main body 13a in order to close an open portion of the bearing main body 13a. It is composed of The closing member 13b is a member for fitting the second rotating shaft 15 (see FIG. 2) into the bearing main body 13a from the open portion so as not to come off while allowing bidirectional rotation.

  The base end portion of the first rotating shaft 11 is immersed in the grip portion 3 and is supported by the grip portion internal mechanism 7 so as to be capable of bi-directional rotation around the central axis with respect to the grip portion 3. The in-grip part mechanism 7 can be rotated in both directions around the axis with respect to the bottomed housing recess 7a that opens toward the one end 3a in the grip 3 and the peripheral wall of the housing recess 7a (that is, the grip 3). And a shaft holder 7b accommodated in the housing. The distal end portion of the shaft holder 7b protrudes from one end 3a of the grip portion 3, and one end of the first rotating shaft 11 can be removably inserted therein. As a result, the shaft holder 7b and the first rotating shaft 11 are configured so as to be capable of bi-directional rotation around the axis as indicated by an arrow B. The reason why the first rotary shaft 11 can be inserted into and removed from the shaft holder 7b is to allow the brush body 21 integrated with the first rotary shaft 11 to be replaced. In addition, the code | symbol 11a shown in FIG. 1 shows the detent | locking piece protruded from the 1st rotating shaft 11 to the side. The anti-rotation piece 11a has a function of preventing the rotation of the first rotary shaft 11 in the direction around the shaft relative to the shaft holder 7b by being fitted in a notch 7h formed at one end of the shaft holder 7b so as to be removable. ing.

(Brush body configuration)
As shown in FIGS. 1 to 3, the brush body 21 is formed in a substantially spherical shape with brush hairs 23 extending radially. Specifically, the brush body 21 includes a brush floor 25 made of a synthetic resin having a small diameter and a substantially spherical shape, and brush bristles 23 arranged on the brush floor 25 in a meridian shape with a predetermined interval in the circumferential direction. . More specifically, as shown in FIG. 2, the brush body 21 (brush floor 25) is composed of a pair of brush constituent bodies 27, 27 formed by equally dividing a sphere, and each of the brush constituent bodies 29 is a second one. The rotating shaft 15 is provided so as to rotate integrally with both ends.

  As shown in FIG. 3, the meridian arrangement means that it is arranged so as to draw a virtual great circle passing through the poles of the brush floor 25 and perpendicular to the latitude line. The brush bristles 27 are arranged in a pleat shape in the direction of the latitude line (arrow A). This is a collection of a plurality of small tooth brushes arranged at regular intervals compared to brush hairs (not shown) arranged at regular intervals, such as chestnut squid, so that the hair in the gaps and grooves in the oral cavity It is characterized by being easy to enter, and being able to easily apply a rotational force to the brush body 21 by gripping the intraoral site as in the tire trad pattern. In other words, the tip of the hair reaches a fine place to enhance the polishing effect, and the rotation of the brush body 21 can be facilitated. Properties such as the material, hardness, thickness, and length of the brush bristles 27 can be set as appropriate. A plurality of types of brush bristles 27, i.e., the size of the brush body 21, may be prepared and used in accordance with preference and necessity.

  The description returns to the second rotation shaft 15. As shown in FIGS. 1 to 3, the second rotating shaft 15 is held by the holding bearing 13 so as to be bi-directionally rotatable with respect to the first rotating shaft 11, and the brush body 21 rotates integrally with the second rotating shaft 15. It is fixed to. The second rotating shaft 15 shown in FIG. 2 extends in a direction orthogonal to the first rotating shaft 11 because two independent bidirectional rotations are realized in the orthogonal direction. You may set freely according to a user's liking, the shape of an intraoral site | part, etc. instead of the meaning which obstructs angles other than this orthogonal.

  With the above configuration, as shown in FIG. 1, the brush body 21 viewed from the grip portion 3 rotates integrally with the bi-directional rotation (arrow B) around the axis of the first rotation shaft 11 and the rotation in the traveling direction. Two independent bi-directional rotations of the bi-directional rotation (arrow C) around the axis of the second rotation shaft 15 are realized. The rotational force for this rotation is obtained when the bristles 23 of the brush body 21 are in rolling contact with the intraoral site. 1 and 4, the user moves the brush body 21 independently in the direction of the bidirectional arrow B ′ and the direction of the bidirectional arrow C ′ by moving the grip portion 3. be able to. At the time of this movement, the brush body 21 is in rolling contact with the intraoral site in each of the above directions. The movement in the direction of the arrow B ′ is the rotation of the brush body 21 around the first rotation axis 11 (the rotation in the direction of the arrow B in FIG. 1), and the movement in the arrow C ′ direction is around the second rotation axis 15 of the brush body 21. Rotation (rotation in the direction of arrow C in FIG. 1).

  Then, since the bristles 23 are in rolling contact with the intraoral site shown in FIG. 4, for example, the upper teeth 101a and gums 101b, compared with the conventional bristles (not shown) that only slide without rotating. Very unlikely to hurt them. On the other hand, paying attention to each of the brush bristles 23, each tip comes into contact with the teeth 101a, the gums 101b, etc. with a reasonable degree, so that a sufficient brushing effect can be obtained when the bounce is rebounded. Brushing is performed so that the ends of the brush hairs 23 arranged in a fold shape also enter into the periodontal pocket 101c, which is the boundary between the teeth 101a and the gums 101b, and scrapes the dirt therein. This effect is the same when the brush body 21 is rotated around the first rotation shaft 11. Although FIG. 4 shows the intraoral site itself of a person, even a denture (not shown) can be used in the same manner.

(Modified example of toothbrush)
A modification of the toothbrush will be described with reference to FIG. The toothbrush 51 according to the modified example is different from the toothbrush 1 described above in that a plurality (three in this case) of brush bodies are provided. The three brush bodies used can be the same as the brush body 21 of the toothbrush 1. Therefore, in the following description, it is called a brush body as in FIG. Hereinafter, a description will be given focusing on parts different from the toothbrush 1.

  The toothbrush 51 includes a brush body support portion 53 attached to one end of a gripping portion (not shown) and three brush bodies 21a, 21b, and 21c supported by the brush support portion 53. The brush body support portion 53 includes a substantially straight insertion portion 55 in which one end side of the brush body support portion 53 can be inserted into the gripping portion, and a substantially U-shaped U-shape support portion provided on the other end side of the insertion portion 55. 57 and a deformed S-shaped tilting portion 59. First rotating shafts 57a and 57a are provided at both upper ends of the U-shaped support portion 57 so as to be rotatable in both directions around the axis, and the brush bodies 21a and 21b are integrated with the first rotating shafts 57a and 57b, respectively. It is fixed to rotate. One end of the tilting part 59 is hinged in a state of being sandwiched between U-shaped support parts, and can tilt so as to bow. The tilting portion 59 is provided with a first rotating shaft 59a provided at the other end so as to be rotatable in both directions around the axis, and rotates integrally with a brush body 21c fixed thereto. Each of the brush bodies 21a, 21b, and 21c is fixed to a second rotation shaft (not shown in FIG. 5) supported so as to be bi-directionally rotatable at the tips of the first rotation shafts 57a, 57b, and 59a. This is the same as in the case of the toothbrush 1. When the tilting portion 59 is sandwiched between the U-shaped support portions 57 and supported in a semi-fixed state, the three brush bodies 21a, 21b, and 21c viewed from above in FIG. 5 form a triangular relationship on the same plane. This does not preclude appropriate changes according to the user's preference and purpose.

  According to the toothbrush 51, various usage methods are provided. Specifically, in addition to using the three brush bodies 21a, 21b, and 21c simultaneously, for example, the brush body 21c is isolated from the other two by tilting the tilting portion 59 and separating it from the U-shaped support portion 57. Can also be used. On the contrary, the two brush bodies 21a and 21b separated from the tilting portion 59 can be used at the same time or one of them. When two or three brush bodies are used at the same time, it is possible to brush a wide area of the oral cavity at the same time, which is convenient for brushing the tongue, for example. When using any one brush body, it is suitable for brushing a narrow part in the oral cavity. In any case, since the brush bodies 21a, 21b, and 21c are capable of bi-directional rotation in two independent directions with respect to the U-shaped support portion 57, similarly to the above-described operational effects of the toothbrush 1. Effective brushing can be performed without damaging the intraoral site.

(Structure of electric toothbrush)
A toothbrush 71 which is a modification of the toothbrush 1 will be described with reference to FIGS. 1 and 6 to 8. The toothbrush 71 is common in appearance to the toothbrush 1 in that it has the grip portion 3, the grip portion outside mechanism 9, and the brush body 21. For this reason, these member names and member numbers are also used in the description of the toothbrush 71. The difference is that the toothbrush 1 is a manual toothbrush, whereas the toothbrush 71 is an electric toothbrush. Hereinafter, the description will be made focusing on the electric drive mechanism of the toothbrush 71.

  First, the configuration of the grip portion 3 will be described. The grip portion 3 is hollow and has a substantially cylindrical appearance. The gripping part 3 is divided into two parts, one gripping part constituting piece 4a and the other gripping part constituting piece 4b, with a virtual plane passing through the central axis as a boundary, both of which have the same shape and are watertightly integrated by screws 3n. It is configured. The grip portion 3 is tapered toward the one end 3a, and the tip thereof is an opening 73a. The first annular rib 73b, the second annular rib 73c, the boss portion 73d, and the third annular portion are directed toward the other end 3b. The rib 73e, the fourth annular rib 73f, and the closing plate 73f are formed in this order. Between the opening 73a and the first annular rib 73b, the first space 75a, between the first annular rib 73b and the second annular rib 73c, the second space 75b, and between the second annular rib 73c and the third annular rib 73e. Between the third annular space 75c, between the third annular rib 71e and the fourth annular rib 71f, a fourth space 75d, and between the fourth annular rib 73f and the closing plate 73f, a fifth space 75e, respectively. Define.

  Reference numeral 77 denotes a shaft holder for inserting and rotating the first rotating shaft 11. The shaft holder 77 is entirely made of synthetic resin, and has a cylindrical holder main body 77a, an annular front end rib 77b formed on the front end side of the holder main body 77a, and a rear end rib 77c also formed on the rear end side. And have. The holder main body 77a is configured to be watertight with the peripheral wall of the opening 73a, and to be able to move in and out without being hindered by the inner wall of the first annular rib 73b. A packing (not shown) may be provided between the holder main body 77a and the peripheral wall for ensuring watertightness without hindering the appearance and rotation. FIG. 7 shows an immersion state, and FIG. 8 shows a protruding state.

  The tip rib 77b is formed to have a larger diameter than the inner diameter of the opening 73a, and is configured to be able to contact the one end side 3a of the grip portion 3 when immersed (FIG. 7). The rear end rib 77c is formed to have a smaller diameter than both the inner diameter of the first annular rib 73b and the inner diameter of the second annular rib 73c, and is accommodated in the second space 75b so that it can move only in the protruding and retracting direction. Yes. Therefore, only the part of the holder main body 77a is present in the first space 75a, and the rear end rib 77c does not enter. The rear end rib 77c does not enter the third space 75c. That is, the first annular rib 73b and the second annular rib 73c cooperate with the rear end rib 77c to prevent the shaft holder 77 from coming off and protruding.

  On the other hand, a torque limiter 91 described later is accommodated in the third space 75c, and a motor 81 and a coupling 83 are accommodated in the fourth space 75d, respectively. The coupling 83 has a function of connecting the motor shaft 81 a of the motor 81 and the torque limiter 91. The battery 85 accommodated in the fifth space 75e is a rechargeable battery, and supplies power to the motor 81 via a power switch 87 (FIG. 6) provided on the grip portion constituting piece 4a. . As the charging to the battery 85, for example, contactless charging by contactless power transmission using electromagnetic induction is suitable. In addition, in order to avoid becoming complicated, illustration of the electric power supply system containing a charging system is abbreviate | omitted in 1st Embodiment.

(Structure of torque limiter)
The torque limiter 91 includes a shaft-side limiter member 93 that rotates integrally with the first rotation shaft 11, a motor-side limiter member 95 that rotates integrally with the motor shaft 81 a of the motor 81, and a shaft-side limiter member 93 and a motor-side limiter member 95. A cam structure 97 formed between them, a pressing spring 99, and a washer 101 are included. The shaft side limiter member 93 is concentrically fixed to the rear end rib 77c so as to be detachable and protrudes in the axial direction, a cam disk 93b concentrically fixed to the central shaft at the open end of the center shaft 93a, the rear surface of the cam disc 93b seen from the center pole 93a, and a two-axis-side protrusion 9 3 c protruding respectively toward the motor side limiter member 95 provided in the circumferential direction at equal intervals. The shaft-side protrusions 9 3 c are preferably mountain-shaped, and the number thereof may be one or three or more as long as the operation is not hindered. The outer diameter of the middle shaft 93a is smaller than the inner diameter of the second annular rib 73c so that it does not come into contact with the peripheral wall of the inner hole during bidirectional rotation or movement in the retracting direction. The inner diameter of the pressing spring 99 is formed to be an inner diameter that can penetrate the middle shaft 93a. The inner hole of the washer 101 is formed to have an inner diameter that can penetrate the middle shaft 93a, and the outer diameter is formed to be an outer diameter that can be accommodated in the third space 73c. The washer 101 serves as a starting point for the pressing spring 99 to apply the pressing force to the shaft limiter member 93 while preventing the pressing spring 99 from entering the inner hole of the second annular rib 73c.

Motor-side limiter member 9 5, in order as viewed from the motor 81, a small-diameter shaft 95a which is connected to the motor shaft 81a coaxially with the coupling 83, the inner diameter of the third annular rib 73e slightly larger diameter than the small-diameter shaft 95a A medium-diameter shaft 95b having a slightly smaller diameter, a large-diameter shaft 95c larger than the relay shaft 95b, and a cam disk 95d provided concentrically at the open end of the large-diameter shaft 95c are provided. With this configuration, the medium diameter shaft 95b can slide or rotate with respect to the outer periphery of the middle hole of the third annular rib 73e. The large-diameter shaft 95c can be rotated in both directions with respect to the third annular rib 73e, but is restricted from moving in and out. Two motor-side protrusions 95e that protrude toward the shaft-side limiter member 93 are formed on the back surface of the cam disk 95d as viewed from the large-diameter shaft 95c. The motor-side protrusions 95e and 95e are each formed in a gentle mountain shape. The motor-side protrusions 95e and 95e constitute a cam structure 97, and are in a positional relationship to engage with the shaft-side protrusions 9 3 c and 9 3 c when rotating. Detailed cam action will be described later.

(Assembly of the parts in the grip)
Please refer to FIGS. First, the middle shaft 93a of the shaft-side limiter member 93 is removed from the rear end rib 77c at one end to expose the open end (FIG. 6), and then returned to the original state after passing through the middle shaft 93a in both members. As a result, the washer 101 and the pressing spring 99 cannot be removed from the middle shaft 93a. Here, these are distributed and arranged in each of the first space 75a, the second space 75b, and the third space 75c. Specifically, the front end rib 77b is outside the grip portion 3, the holder main body 77a is mostly in the first space 75a, the remaining part of the holder main body 77a and the rear end rib 77c are in the second space 75b, The middle shaft 93a, the washer 101, the pressing spring 99, and the cam disk 93b (shaft side protrusion 93c) penetrating through the middle hole of the two annular ribs 73c are arranged in the third space 75c. Then, the washer 101 is pressed against the second annular rib 73c by the spring force of the pressing spring 99 (the shaft-side limiter member 93 is pressed toward the motor-side limiter member 95). In this state, the cam disk 93b can be moved in the protruding direction against the spring force of the pressing spring 99. When the user moves the cam disk 93b by hand, the shaft holder 77 protrudes and the hand is released by the spring force. It has come back to the original.

  On the other hand, the battery 85, the motor 81, and the coupling 83 are arranged in the fourth space 75d in this order as viewed from the closing plate 73f. Although illustration is omitted, electrical wiring among the battery 85, the power switch 87, and the motor 81 is also performed. Next, the motor side limiter member 95 is arranged. The large diameter shaft 95c is disposed in the third space 75c while the medium diameter shaft 95b is aligned with the middle hole of the third annular rib 73e, and the coupling 83 and the motor 81 are accommodated in the fourth space 75d. The battery is stored in the fifth space 75e. Thereby, when the motor 81 is rotated, the motor side limiter member 95 is in a state of being rotated. Furthermore, in the third space 75c, the shaft-side protrusions 95c and 95c and the motor-side protrusions 95e and 95e can be engaged in the rotation direction.

(Effects of electric toothbrush)
The effects of the cam structure 97 will be described with reference to FIGS. In addition, FIG. 9 is a diagram schematically showing a state where the motor side projections that rotate are expanded on a plane and the shaft side projections are engaged with each other. In FIG. 9, an arrow D indicates the moving direction of the motor-side protrusion 95e. Reference numerals 93c-1 to 93c-4 all indicate that one shaft-side protrusion moves up and down in the order of numbers, and reference numerals 93'c-1 to 93'c-3 indicate other corresponding one of the shaft-side protrusions. The state of vertical movement of is shown. Similarly, reference numeral 95e indicates one motor side protrusion, and reference numeral 95'e indicates the other motor side protrusion.

  According to the electric toothbrush 71, when the user operates the power switch 87, the switch motor 81 is energized and the motor shaft 81a rotates. Although the rotation direction may be one direction, the electric toothbrush 71 is configured to rotate in the reverse direction by pressing the power switch 87 twice. In other words, the cam disk 95d is rotated by the rotation of the motor shaft 81a. By rotation, the motor side protrusions 95e and 95e and the shaft side protrusions 93c and 93c are engaged. This engagement state will be described below with reference to the member numbers shown in FIG. In addition, since description of the effect which concerns on engagement with motor side protrusion 95'e and axial side protrusion 93'c-1 to 93'c-3 is the same as description of the effect mentioned below, those description Is omitted.

  That is, in FIG. 9, the motor-side protrusion 95e is engaged with the shaft-side protrusion 93c-1. At this time, since both the protrusions of the shaft-side protrusion 93c-1 are formed in a mountain shape, the reaction force F against the pressing force f accompanying the contact between the ridge lines is received from the motor-side protrusion 95e. The reaction force F is divided into a protruding component force Fv and a rotational component force Fh. The protruding component force Fv is a component force that acts in the direction in which the shaft-side protrusion 93c-1 is pushed up (the direction in which the first rotating shaft 11 protrudes) against the spring force of the pressing spring 99. The rotation component force Fh is a component force that acts on the shaft-side protrusion 93c-1 in the rotation direction (the direction in which the first rotation shaft 11 is rotated).

  That is, the shaft-side protrusion 93c-1 that has received the protrusion component force Fv and the rotation component force Fh at the same time is engaged with the motor-side protrusion 95c-1 with respect to the shaft-side protrusion 95c-1 by the cam action between the motor-side protrusion 95e due to further rotation. The alignment position slides (slides up) to the position of the shaft side protrusion 95c-2. Since this position is the apex of both protrusions, the pressing force f and the reaction force F cancel each other, and the protruding component force Fv and the rotational component force Fh become zero. That is, the protrusion amount of the first rotating shaft 11 is maximized, and the rotation of the first rotating shaft 11 is only zero or due to inertia. Thereafter, the shaft-side protrusion 93c-3 is pushed back by the pressing force of the pressing spring 99 and slides (slids down) to the position of the shaft-side protrusion 93c-4. When sliding down, neither the projection component force Fv nor the rotation component force Fh is generated, but it is generated by further rotation, and the projection and rotation of the first rotating shaft 11 are repeated accordingly.

Here, it is assumed that the first rotating shaft 11 (shaft side limiter member 93) cannot be rotated due to an overload. In this case, since the rotational component force Fh is defeated, it does not rotate, but only the protrusion and withdrawal motion is performed by the protruding component force Fv. That is, there is no block in the rotation direction. That is, the function as a torque limiter is exhibited. The torque limiter action eliminates the risk of damaging the intraoral site without overloading it.

  Based on FIG. 10, a second embodiment of the present invention will be described. The brushes 1A and 51A according to the second embodiment are for massaging the human body, and are structurally basically different from the toothbrushes 1 and 51 of the first embodiment, respectively. The brushes 1A and 51A may be manual or electric. Here, the description of the structure is omitted, and only the usage mode is shown. The brush body 21A has the same structure as 21, 21a, 21b, and 21c described above, but the size, the number and thickness of the brush hair, and the hardness are adjusted for human body massage. Needless to say.

  The brush 1A is configured so that the brush body 21A can rotate and rotate in at least two different directions independently by friction received from the face as a contact portion when the grip portion 3A gripped by the user is moved. For this reason, for example, when the brush body 21A is moved in the two directions indicated by the intersecting arrows, the brush body 21A can sufficiently massage the face by rolling and rotating, while being effectively prevented from being damaged. If there is no rolling rotation, the brush hair tip of the brush body 21A may be dragged while being pressed against the face, but the face may be damaged, but the rolling rotation eliminates this fear. Such effects can be generated not only on the face but also in any part of the human body.

The brush 51A can also be massaged efficiently without damaging the contact site such as the face by moving the grip portion 55A by the user so that the brush body 51A rolls and rotates in two directions.

DESCRIPTION OF SYMBOLS 1 (Manual) Toothbrush 1A Brush 3 Gripping part 3A Gripping part 3a One end side 3b The other end side 4a, 4b Gripping part component piece 5 Rotation support mechanism 7 Gripping part inner mechanism 7a Housing recessed part 7b Shaft holder 7h Notch 9 Gripping part outer mechanism 11 First rotating shaft 11a Non-rotating piece 13 Holding mechanism (holding bearing)
13a Bearing body 13b Closing member 15 Second rotating shaft 21a, 21b, 21c Brush body 21, 21A Brush body 23 Brush hair 25 Brush floor 27 Brush component 51 (Manual) Toothbrush 51A Brush 53 Brush body support section 55 Insertion section 55A Gripping part 57 U-shaped support part 57a, 57b First rotating shaft 59 Tilt part 59a First rotating shaft 71 (Electric) toothbrush 73a Opening 73b First annular rib 73c Second annular rib 73d Boss part 73e Third annular rib 73f First 4 annular ribs 73g closing plate 75a first space 75b second space 75c third space 75d fourth space 75e fifth space 77 shaft holder 77a holder body 77b front end rib 77c rear end rib 81 motor 81a motor shaft 83 coupling 85 battery ( Power supply)
87 Power switch 91 Torque limiter 93 Shaft side limiter member 93a Middle shaft 93b Cam disk 93c Shaft side projection 95 Motor side limiter member 95a Small diameter shaft 95b Medium diameter shaft 95c Large diameter shaft 95d Cam disk 95e Motor side projection 97 Cam structure 99 Press spring 100 Washer 101a Teeth 101b Gum 101c Periodontal pocket 111 User

Claims (12)

A gripping part for a user to grip , a brush body support part provided on one end side in the longitudinal direction of the gripping part, and a plurality of brush bodies supported by the brush body support part ,
Each of the brush bodies is configured such that when the user moves the grip portion, the brush body can be rotated and rotated in at least two different directions by friction received from a contact portion. And brush. The brush body support portion includes a substantially U-shaped U-shaped support portion,
The brush according to claim 1, wherein one brush body is supported on each of both upper ends of the U-shaped support portion. A tilting part with one end hinged so as to bow while being sandwiched between the U-shaped support part,
One brush body supported by the other end of the said tilting part. The brush of Claim 2 characterized by the above-mentioned. The brush according to claim 3, wherein the tilting part is configured to be semi-fixable at a desired angle with respect to the U-shaped support part. 5. The brush according to claim 3, wherein the brush body supported by the tilting part and the two brush bodies supported by the U-shaped support part have a triangular relationship on the same plane. The brush body support portion is provided with respect to the grip portion so as to be bi-directionally rotatable about an axis,
A motor having a motor shaft, a power source for supplying electric power to the motor, and a torque limiter for transmitting the rotational motion of the motor shaft to the brush body support portion are arranged in the gripping portion. The brush according to any one of claims 1 to 5. The grip portion and the brush body support portion are further provided so as to be able to appear and disappear with respect to the grip portion,
The brush according to claim 6 , wherein the torque limiter is configured to be able to transmit a protruding and retracting motion with respect to the grip portion to the brush body support portion. The torque limiter is formed between a shaft-side limiter member that rotates integrally with the brush body support portion, a motor-side limiter member that rotates integrally with the motor shaft of the motor, and the shaft-side limiter member and the motor-side limiter member. And a pressing spring that presses the shaft-side limiter member toward the motor-side limiter member,
The cam structure includes at least one shaft-side protrusion protruding from the shaft-side limiter member toward the motor-side limiter member, and at least one motor side protruding from the motor-side limiter member toward the shaft-side limiter member. A protrusion, and
The motor-side protrusion continuously engages with the shaft-side protrusion as the motor-side limiter member rotates, and transmits the rotational movement of the motor-side limiter member to the shaft-side limiter member. Slide the engagement position with the protrusion to ride on the motor-side protrusion while resisting the spring force of the pressing spring, and eventually get over and rotate and move the brush body support part. It is configured so that the shaft-side protrusion rides on and over the motor- side protrusion even when the brush body support portion does not rotate due to an overload. The brush according to claim 7 . Each is of the brush body, when the user moves the grip portion, characterized in that it is configured to allow rotation roll in both directions with respect to the brush body support portion by friction receiving from the contact site The brush according to claim 6 to 8 . It is a toothbrush. The brush in any one of Claim 1 thru | or 9 characterized by the above-mentioned. The brush according to any one of claims 1 to 9 , wherein the brush is used for massage of a human body or an animal body. The brush body which can be used for the brush in any one of Claims 1 thru | or 11.

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