Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C15/00—Devices for cleaning between the teeth
  • A61C15/02—Toothpicks

Definitions

• the invention relates to an interdental cleaner with a rod-shaped carrier made of a plastic material which extends along a longitudinal axis, wherein the rod-shaped carrier has in its front end portion a cleaning member in the form of a coating of a soft-elastic plastic material, wherein in one rear Endabsch nitt of the carrier, which is the ent axially opposite to the front end portion, a handle part is arranged.
• Such an interdental cleaner which is also referred to as Zahnsto cher, is known for example from EP 0 932 371 Bl.
• the interdental cleaner shown there be sitting a rod-shaped carrier of a rigid Kun ststoff, at the rear end over a dacasbe rich a handle part is integrally formed.
• the handle portion facing away from the end of the carrier is provided with a soft-elastic coating, which may be formed with radially protruding structural elements and forms a cleaning part.
• the user grasps the interdental cleaner on the handle part and inserts the front end of the carrier and thus the cleaning part into the interdental space and moves the interdental cleaner back and forth.
• the carrier has a certain elasticity and can be elastically deformed, if a particular oblique Stel development of the cleaning section within the interdental space is necessary, but this can only be achieved by the user aligns the entire interdental cleaner accordingly obliquely, which in some cases schwie to reach rig.
• the invention has for its object to provide a Interden talrlick said type, which allows a variab lere positioning of the cleaning part within the tooth space.
• an interdental cleaner with the features of claim 1.
• This provides a stabför shaped carrier of a plastic material, which extends along a longitudinal axis, wherein the rod-shaped carrier in its front end portion, a cleaning member in the form of a coating of a soft-elastic plastic material, wherein in a rear Endab section of the carrier, which is axially opposite the front end portion, a handle part is arranged, wherein the carrier outside of the cleaning part a deformation section which shows a significantly greater deformation under the following conditions:
• a section line is calculated from the x and y coordinates of its starting point and its end point, passing through the starting point and through the end point of the respective section, and
• the cutting angles of two or three sections are straight at least 50% larger than the largest Thomaswin angle of all other section line.
• the invention is based on the basic idea that distribute in the known interdental cleaners from the prior art in the application, the deformations on the entire axial length of the carrier and thereby cause the nachtei ligen curvature of the interdental cleaner and the re sulting material stresses.
• ei ne targeted change in rigidity in Verformungsab section of the carrier takes place almost the entire (elastic) deformation of the interdental cleaner in the area of the deformation section. The rest of the wearer is thus exposed to much lower loads. At the posi tion of the deformation section with less rigidity precautions can be taken to safely absorb the on passing loads.
• the clamping means for clamping the interdental cleaner may have two mutually opposite cheeks, which move towards each other during clamping and thereby firmly clamp the interdental cleaner between him and perpendicular to his ner longitudinal axis.
• the clamping plane is thus perpendicular to the longitudinal axis of the carrier.
• the tensioning means is designed to firmly clamp the interdental cleaner in any direction perpendicular to its longitudinal axis.
• the Kragabhow of the interdental cleaner in the sense of He invention is defined as the area of the interdental Niger, which extends from the clamping level to the beginning of the cleaning part.
• the cleaning part is thus not part of the Kragabitess.
• the subdivision of the Kragabites into sections is preferably such that the end point of a section coincides with the starting point of the next adjacent section.
• the sections in each case have an axial length of at most 2 mm, in particular at most 1 mm, in order to be able to better dissolve deformations with be limited axial extent locally.
• the external force acts on the cleaning member to simulate the deformation behavior of the interdental cleaner in its application.
• the external force acts in particular on the axial center of the cleaning part.
• the determination of the x and y coordinates of the starting and the end points of the sections can be done, for example, by means of optical measuring methods, for example by means of a camera or measuring projector.
• the x-axis coincides with the longitudinal axis of the carrier and the y-axis is paral lel directed to the direction of action of the external force.
• the two-dimensional plane spanned by the x and y axes is thus perpendicular to the clamping plane.
• Yag lfl-ag Xag t yo; ag, where m ag is the slope of the straight line and yo ; Ag denotes the y-intercept of the section straight. y ag and x ag are the y and x coordinates of the section line.
• the cutting angles are always calculated according to the invention on the basis of two adjacent sections. Between two adjacent section lines with the slopes m agi and m ag2 , the intersection angle cx is determined to be:
• O ⁇ arctane (] (m a gi-m ag2 ) / (1+ (m agi Tn ag2 ))
• the cutting angle is positive when the
• Intersection angle corresponds to a curvature of the associated sections in the effective direction of the external force. Corresponding is the angle of intersection is negative if there is a curvature opposite to the effective direction of the external force. At a cutting angle equal to 0, there is no relative curvature of the Abschnit te each other.
• the cutting angles of two or three are fromellessitts straight to at least 80%, in particular at least 100% and preferably at least 200% greater than the largest angle of intersection of all other section line.
• intersection angles of two or three consecutive section lines are at least 50% greater than the maximum intersection angle of all other section lines.
• Consecutive section lines in the sense of the invention are adjacent section lines to each other.
• the carrier may be integrally formed with the handle portion, whereby the interdental cleaner is easy to manufacture.
• the carrier may be positively and / or kraftschlüs sig connected to the handle portion, so that the material of the handle portion, regardless of the material of the wearer out of the handleability is selectable.
• the Kragabites of the interdental cleaner is divided from the clamping plane to the cleaning part in at least ten, in particular in at least fifteen or twenty, most preferably in at least thirty sections sliding axial length.
• the deformation section within the cantilever section can have the lowest bending stiffness of the entire carrier, so that the greatest amount of deformation is required at this position. during the use of the interdental cleaner. The material loads of the rest of the Interdentalrei niger be reduced, which increases the life of the interdental cleaner.
• the reduced bending stiffness of the deformation section is achieved by a cross-sectional weakening and / or by an at least proportionate use of a material with reduced bending stiffness and / or by the geometry of the deformation section.
• the handle part is at least partially formed plate-shaped, wherein the load action direction of the external force is directed normal to Plat tenebene the handle part.
• the handle part is easier to grasp and handle in this embodiment.
• the external forces are directed mainly normal to the plate level of the cleaning part, so that in this direction, the changed stiffness particularly before geous effect.
• the deformation section is at least partially configured plate-shaped, where is directed at the load acting direction of the external force normal to the plate plane of the deformation section.
• this embodiment can be combined with a plat tenförmigen handle part, so that the Plat tenebenen the handle part and the deformation part are oriented parallel to each other. The deformation properties of the interdental cleaner when cleaning the interdental spaces are thereby optimized.
• FIG. 1 shows an interdental cleaner according to the invention in a schematic plan view
• FIG. 2 shows the interdental cleaner of FIG. 1 in a tensioned state in a side view
• FIG. 3 shows the interdental cleaner of FIG. 2 with un divided collar section
• Fig. 4 is an enlarged view of a sectionbe range from Fig. 3;
• Fig. 5 shows the interdental cleaner of FIGS. 2 and 3 in the deflected state
• Fig. 7 is an enlarged view of the Operaberei surface of the interdental cleaner of FIG. 6 for calculating the cutting angle.
• Fig. 1 shows an interdental cleaner 10 according to the invention with a rod-shaped carrier 11 made of a first plastic material in a schematic plan view.
• the carrier
• FIG. 11 extends along a longitudinal axis L shown in dashed lines in FIG. 1, which, as shown in FIG.
• the carrier 11 runs horizontally. In its front, as shown in FIG. 1, the left end portion, the carrier 11 has a cleaning part
• a coating 13 made of a soft-elastic plastic material.
• a plurality of radially projecting fingers and / or bristles on the coating 13 are arranged, which are not shown for reasons of clarity. Radial directions in the sense of the invention are perpendicular to the longitudinal axis L of the carrier 11. The fin ger and / or bristles are used to clean the interdental spaces.
• a plate-shaped handle member 16 is arranged, wherein the plane of the plate is parallel to the drawing plane Chen.
• the interdental cleaner 10 is limited in the longitudinal direction by its rear axial end 14, which corresponds to the rear axia len end of the handle portion 16, and by its front axial end 15 which corresponds to the front axial end of the cover 13. Between the handle part 16 and the cover 13, the support 11 has a trapezoidal configuration, which tapers in the direction of the front axial end 15.
• the carrier 11 has a Ver shaping section 18 with a compared to a übri conditions connecting portion 17 of the carrier 11 significantly lower ren stiffness to the bending behavior of the interdental cleaner 10 targeted influence.
• the deformation section is in the tra pezförmigen area in which the handle part 16 merges into the carrier 11.
• the deformation section 18 changed the stiffness of the remaining connection portion 17 of the support 11 only to a small extent due to the cleaning part 12 towards tapered configuration.
• the lower rigidity of the deformation section 18 is achieved in that the deformation section 18 consists of a different material than the remaining connection region 17 of the carrier 11. Additionally or alternatively, the cross section of the deformation portion 18 to the cleaning part 12 is tapered ver, which also reduces the rigidity. Both the choice of material and the cross-sectional taper can be provided independently of each other or in combination with one another in the sense of the invention. Additionally or alternatively, other possibilities for influencing possible, please include, for example, by a special design of the geometry of the deformation section 18th
• the interdental cleaner 10 is firmly clamped by means of a clamping means 19.
• the tensioning means 19 is, for example, a clamping element with two opposing cheeks, which receive between them the interdental cleaner 10 and nen within a clamping plane E einspan.
• the clamping plane E is perpendicular to the longitudinal axis L of the carrier 11 and intersects the interdental cleaner 10 at a distance a of 10 mm from its rear axial end 14, as shown in Fig. 2.
• the cleaning part ⁇ 12 is not part of the Kragabitess.
• the Kragabites 20 of the clamped interdental cleaner 10 is divided according to FIG. 3 in 11 sections di with the same axial length li, where the index i as a natural number for the corresponding section is na (Fig. 4).
• Section di is always the section di which is closest to the clamping plane E. Thereafter, the numeralization takes place with increasing distance to the clamping plane E. From section you is therefore the cleaning part 12 next.
• Each section di has an opening point ai facing the grip part 16 and an end point e1 facing the cleaning part 12 (FIG. 4).
• di + i the end point e ⁇ of the axially rearward section corresponds to Section of the starting point ai + i the axial front section d i + i .
• an external force F acts on the load action point P F of the cleaning part 12 (FIGS. 2 and 3) downwards perpendicular to the longitudinal axis L of the carrier 11 such that the load acting point P F is elastically deflected by a distance d of 8 mm perpendicular to the longitudinal axis L of the carrier 11.
• the interdental cleaner 10 assumes the ge curved shape shown in Fig. 5 under the influence of the external force F. From Fig. 5 shows that the predominantly large proportion of the deformation of the interdental cleaner 10 in the region of the deformation section 18 takes place while the remaining connection region 17 of the support 11 is only slightly curved or remains largely rectilinear.
• each section di its respective starting points ai and its endpoints e ⁇ are determined.
• the points consist of assigned x- and y-coordinates, wherein the x-axis coincides with the longitudinal axis L of the carrier 11 and the y-axis is directed parallel to the direction of action of the external force F.
• the determination of the coordinates is carried out for example by means of a camera with sufficiently high resolution, which allows a determination of the coordinates in the order of magnitude of 100 pm, preferably 10 pm.
• a section straight agi associated with the section di is calculated, which is defined by the starting point ai and by the end point ei of the Ab
• the straight-line agi is uniquely determined by where x a g ; i and y ag; i represent the x and y coordinates of the section line ag ⁇ , respectively. This also applies analogously to the starting point of a * (x a; i / y a i) and the ending point ei (x e i / Ye; i) ⁇
• the section straight aq ⁇ extends through the initial ⁇ point A and the end point e ⁇ of the section di.
• 0 £ arctan (
• the angle of intersection a characterizes the curvature of the Kragabites 20 within a portion di and is positive for the purposes of the invention, when the Kragabrough 20 is curved in the direction of the external force F.
• the intersection angle ⁇ is negative when there is a curvature opposite to the direction of the external force F.
• the intersection angle a is 0 if no curvature is given in the section di. From FIG. 5 it can be seen that the second region d 2 and the third region d 3 have a substantially greater curvature than the remaining regions. As a result, the associated cutting angles a are significantly larger than the largest
• Cutting angle a at least 50% larger than the largest cutting angle a. the remaining sections di or the next larger cutting angle.
• the interdental cleaner 10 is net in a deformed state with solid lines.
• a known interdental cleaner 21 of the prior art in a deformed state is shown in dashed lines.
• the known interdental cleaner 21 has a continuous curvature behavior, areas with approaching linear course completely absent. This deformation behavior causes the entire carrier of the known inertia cleaner 21 to be curved, which considerably reduces its utility properties. None of the intersecting angles a of the known interdental cleaner 21 is in the described sense at least 50% greater than the largest cutting angle a of the other sections di-

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• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
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Citations (6)

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• 2018
  • 2018-03-16 DE DE102018002147.6A patent/DE102018002147B3/de active Active
• 2019
  • 2019-03-04 US US16/980,155 patent/US20210000577A1/en active Pending
  • 2019-03-04 CN CN201980019798.5A patent/CN112165917B/zh active Active
  • 2019-03-04 JP JP2020549699A patent/JP7342016B2/ja active Active
  • 2019-03-04 WO PCT/EP2019/000062 patent/WO2019174782A1/de not_active Ceased
  • 2019-03-04 EP EP19712682.4A patent/EP3764943B1/de active Active
  • 2019-03-04 ES ES19712682T patent/ES2914367T3/es active Active

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