WO2020110193A1

WO2020110193A1 - Dental floss case

Info

Publication number: WO2020110193A1
Application number: PCT/JP2018/043545
Authority: WO
Inventors: 克哉小林; 佐野　健二
Original assignee: デンタルプロ株式会社
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2020-06-04

Abstract

A floss wound body 3, which has been formed by winding floss around a single-flange bobbin having a disk-shaped flange part 32 at one end of a winding core 31, is mounted rotatably on a shaft part 4 provided protruding from the inner surface of a bottom surface part 24 of a case main body 2 such that the flange part 32 abuts the inner surface of the bottom surface part 24. On the inner surface of the bottom surface part 24 of the case main body 2, an entanglement prevention rib 5 is provided protruding from one or a plurality of locations in proximity to the peripheral edge of the flange part 32. The entanglement prevention rib 5 has a winding guide surface 53 extending with a slope oriented from the inner surface of the bottom surface part 24 of the case main body 2 toward the shaft part 4. When the floss becomes loose due to the floss wound body 3 rotating excessively, or the like, the loosened floss follows the winding guide surface 53 so as to be wound back on the outer peripheral surface of the floss wound body 3, thereby preventing entangling of the floss around the shaft part 4.

Description

Dental floss case

The present application relates to a dental floss case for storing a wound type dental floss.

As a case in which a dental floss (hereinafter simply referred to as “floss”) used for interdental cleaning is stored so as to be portable, those disclosed in

Patent Documents

1 and 2 are known. These dental floss cases have, as a schematic configuration, a case body that can be opened and closed, and a floss winding body that is rotatably accommodated in the case body. The floss winding body is formed by winding a floss around a cylindrical winding core, and the winding core is attached to a shaft portion provided on the inner surface of the case body. The floss is drawn out from an outlet provided on the side surface of the case body, and cut to an arbitrary length using a cutter provided in the vicinity of the outlet.

JP-A-3-55054 JP, 2017-46733, A

In the dental floss case in which the floss is wound around the cylindrical winding core as in the conventional case, for example, when the floss is pulled out vigorously when the remaining amount of the floss is low, the floss winding is performed. The body may over-rotate and the floss may melt. When the loosened floss is entangled with the root of the shaft, the floss winding body does not rotate smoothly and the floss cannot be pulled out. In particular, in the case of using the unwax (non-wax) type floss, the shape retention property of the winding body is low, and thus the floss is easily melted and entangled.

The invention disclosed in the present application has been made to solve such a problem, and prevents the unraveled floss from being entangled with the shaft even when the floss is unraveled due to excessive rotation of the floss winding body. It is intended to provide an obtainable dental floss case.

In order to achieve the above-mentioned object, a dental floss case of the invention disclosed in the present application comprises a floss winding body in which floss is wound around a cylindrical winding core, and a case body which accommodates the floss winding body. In a dental floss case configured such that the winding core is rotatably mounted on a shaft portion provided inside the case body, and the floss is drawn out from an outlet provided on a side surface of the case body. , The shaft portion is provided on the inner surface of the bottom portion of the case body,
The winding core has a disk-shaped collar portion at one end, and is attached to the shaft portion so that the collar portion abuts the inner surface of the bottom portion of the case body, and the bottom portion of the case body is also attached. On the inner surface, at least one entanglement prevention rib is protrusively provided in the vicinity of the periphery of the collar portion, and the entanglement prevention rib extends from the inner surface of the bottom portion obliquely toward the shaft portion. The basic structure that the guide surface is formed is adopted.

According to this configuration, even if the floss loosened due to over-rotation of the floss take-up body or the like fluctuates irregularly inside the case body, when the floss is pulled in the pulling direction, the take-up guide surface of the entanglement prevention ribs Since it is rewound on the outer peripheral surface of the floss winder while in contact with it, entanglement and entanglement of the floss are eliminated, and the floss can always be pulled out smoothly.

In the present invention, when the entanglement preventing ribs are radially arranged at a plurality of locations around the shaft portion, the action of rewinding the loosened floss works well in the entire circumferential direction of the floss winder. Therefore, it is more preferable.

Further, in the present invention, the top surface inner surface facing the bottom surface inner surface of the case main body is formed flat, and between the upper end of the shaft portion and the other end of the winding core and the top surface inner surface. It is also possible to adopt a configuration in which there is a gap through which the floss can pass. According to this, it is possible to prevent entanglement at the upper end side of the shaft portion.

Further, in the present invention, it is more preferable that the rising height of the entanglement prevention rib is equal to or larger than the size of the gap provided between the other end of the winding core and the inner surface of the top surface portion. According to this, even if the floss take-up body moves up and down along the shaft portion, the entanglement prevention rib always stands up to a height higher than the rising position of the collar portion, so that the floss slips under the collar portion. It is also possible to prevent the base of the shaft from being entangled.

Further, in the present invention, the winding core has a disk-shaped collar portion at the other end, the inner surface of the top surface portion facing the inner surface of the bottom surface portion of the case body, and the periphery of the collar portion on the other end side. At least one entanglement prevention rib is provided in proximity to the entanglement prevention rib. The entanglement prevention rib provided on the top surface portion side extends obliquely from the top surface portion inner surface toward the shaft portion side. It is also possible to adopt a configuration in which the surface is formed. In this way, by providing the entanglement prevention ribs on both the inner surface of the bottom surface and the inner surface of the top surface of the case body, it is possible to prevent entanglement of the floss and entanglement of the shaft portion more thoroughly.

According to the dental floss case configured as described above, even when the floss is loosened due to over-rotation of the floss take-up body or the like, when the floss is pulled in the pull-out direction, it comes into contact with the winding guide surface of the entanglement prevention rib. However, since it is rewound onto the outer peripheral surface of the floss winder, the floss entanglement and the entanglement with the shaft portion are eliminated, and the floss can always be pulled out smoothly.

It is a perspective view showing the whole dental floss case composition concerning one embodiment of the invention indicated by this application. FIG. 3 is an exploded perspective view showing a component structure of the dental floss case. It is sectional drawing of the said dental floss case. It is explanatory drawing which shows the effect|action of the entanglement prevention rib of the said dental floss case. It is explanatory drawing about the rising height of the entanglement prevention rib of the said dental floss case. It is a partial perspective view which shows the other form of the entanglement prevention rib. It is sectional drawing of the dental floss case which concerns on other embodiment of the invention which this application discloses.

Hereinafter, embodiments of the invention disclosed in the present application will be described with reference to the drawings.

1 to 5 show an embodiment of a dental floss case. The dental floss case 1 includes an openable/closable case body 2 and a floss winding body 3 housed inside the case body 2.

The illustrated case body 2 has a rounded square planar shape, is divided into two in the thickness direction, and a pair of

case halves

21 and 22 constituting each part thereof are connected via a hinge portion 23. .. Both

case halves

21 and 22 and hinge portion 23 are integrally molded of synthetic resin.

The shaft half 4 that supports the floss roll 3 is provided on the inner surface of one of the case halves 21 in a protruding manner. In the following description, in a state where the shaft portion 4 is upright, the root side is defined as “down” and the tip side is defined as “upper”, and the positional relationship and operation of each part and each member based on the vertical direction thereof. I will explain the direction of.

The part of the lower case half body 21 on which the shaft part 4 is erected is referred to as a "bottom part 24". The shaft portion 4 is integrally formed with the lower case half body 21 so as to stand upright from the substantial center of the bottom surface portion 24 with respect to the inner surface of the bottom surface portion 24. In addition, a portion of the upper case half 22 that faces the bottom surface portion 24 is referred to as a "top surface portion 25". The inner surface of the top surface portion 25 is formed into a smooth flat surface. The case half 21 on the lower side and the case half 22 on the upper side are closed to each other through appropriate engaging means. An outlet 26 for drawing out the floss is provided on the side surface of the lower case half body 21, and a cutter 27 for cutting out the extracted floss is provided in the vicinity of the outlet 26.

The shaft portion 4 has a cylindrical outer shape, and its peripheral portion is divided by a plurality of slits (four slits in the illustrated embodiment) extending parallel to the shaft center. The rising height of the shaft portion 4 is slightly lower than the height of the internal space when the upper and

lower case halves

21 and 22 are closed, and the top surface portion 25 and the shaft portion of the upper case half body 22 are Between the upper end of 4 and the upper end of 4, there is provided a gap d1 which is equal to or larger than the amount by which the floss can pass.

The floss winding body 3 is formed by winding the floss around a bobbin having a cylindrical winding core 31. The bobbin of the illustrated form is a single-flange type bobbin in which a disk-shaped collar portion 32 is integrally formed on one end of a winding core 31. The floss is wound in a range in which the other end of the winding core 31 (the side without the flange portion 32) is slightly left and is in contact with the flange portion 32 side so as not to protrude from the outer peripheral edge of the flange portion 32. There is.

The floss winding body 3 is attached to the shaft portion 4 so that the collar portion 32 is brought into contact with the inner surface of the bottom surface portion 24 of the lower case half body 21. With the floss winding body 3 mounted on the shaft portion 4, a gap d2 is provided between the upper end of the winding core 31 and the top surface portion 25 of the upper case half body 22 to allow passage of the floss. Has been. As a result, the floss winding body 3 mounted on the shaft portion 4 is held so as to be vertically movable along the shaft portion 4 by the gap.

The gap d2 provided above the winding core 31 and the gap d1 provided above the shaft portion 4 may have the same size or may be slightly different. The magnitude relationship when they differ is not particularly limited.

The main part of the dental floss case 1 is provided with a entanglement prevention rib 5 projecting from the inner surface of the bottom surface portion 24 of the lower case half body 21, and the entanglement prevention rib 5 cooperates with the flange portion 32 of the floss winding body 3. The point is that it works and prevents floss entanglement and entanglement.

The entanglement prevention ribs 5 are arranged at one place or a plurality of places (six places in the illustrated form) so as to surround the floss winding body 3 mounted on the shaft portion 4. The entanglement prevention rib 5 of the illustrated embodiment is a plate-shaped protruding piece having a substantially triangular shape in a side view, and the base portion 51 coupled to the inner surface of the bottom surface portion 24 is arranged radially around the shaft portion 4. The upright portion 52 formed on the shaft portion 4 side is upright from the inner surface of the bottom surface portion 24 in the vicinity of the peripheral edge of the flange portion 32. The space between the upright portion 52 and the collar portion 32 is set so that the floss does not easily enter (about 0.2 mm as a guide).

A winding guide surface 53 that extends obliquely from the inner surface of the bottom portion 24 toward the shaft portion 4 is formed on the side far from the shaft portion 4. The surface of the winding guide surface 53 is finished smoothly. The rising height h of the entanglement prevention rib 5 is set to be not less than the clearance d2 (the height at which the floss winding body 3 can move up and down) provided above the winding core 31.

4 and 5 are explanatory views of the action of preventing the entanglement of the floss by the entanglement prevention rib 5. Even if the floss unraveled due to over-rotation of the floss winding body 3 runs irregularly inside the case body 2, when the floss is pulled in the pull-out direction, as shown by an arrow X in FIG. While being in contact with the winding guide surface 53 of the prevention rib 5, it is rewound onto the outer peripheral surface of the floss winding body 3. As shown in FIG. 5, even if the floss winding body 3 moves up and down, the rising height h of the entanglement prevention rib 5 is equal to or higher than the rising height d2 of the collar portion 32. It does not sneak downward and entangle with the base of the shaft portion 4. Further, as shown in FIG. 4, since the upper end of the shaft portion 4 is separated from the top surface portion 25 of the case body 2, the floss passes through the gap d1 as indicated by the arrow Y. Therefore, the upper end of the shaft portion 4 does not get entangled.

Due to this action, the entanglement of the floss and the entanglement with the shaft portion 4 are eliminated, and the floss can always be pulled out smoothly. Even if the posture of the case main body 2 is changed when carrying the device, there is no particular problem in the above-mentioned entanglement preventing action. Further, since the entanglement prevention rib 5 rising from the inner surface of the bottom surface portion 24 of the case body 2 can be integrally formed with the case body 2 similarly to the shaft portion 4, the manufacturing efficiency is excellent.

Although the invention disclosed by the present application has been described above with reference to the drawings, the technical scope of the invention disclosed by the present application should not be construed in a limited manner according to the illustrated embodiment, and is not limited to the description of the claims. It should be conceptually interpreted based on. In carrying out the invention disclosed in the present application, it is possible to obtain substantially the same operational effects as those of the exemplary embodiment with respect to the shapes and structures of members and parts, the positional relationship, the joining form, etc., which are not specifically specified in the claims. It can be appropriately modified and implemented within the range.

For example, the case body 2 has an internal space capable of accommodating the floss winding body 3, and the shaft portion 4 projects from the inner surface corresponding to the bottom surface portion 24 toward the internal space. As long as it is provided, the material, appearance shape, opening/closing method, closing mechanism, forms of the outlet 26 and the cutter 27, etc. of the case body 2 are not particularly limited.

Further, regarding the entanglement prevention rib 5, the cross-sectional shape of the winding guide surface 53 may be a curved shape such as an arc or S-shape. As for the number of the entanglement prevention ribs 5, it is sufficient if at least one is provided, but in practice, it is preferable to arrange the entanglement prevention ribs 5 at approximately three to eight locations at substantially equal intervals.

The width dimension of the winding guide surface 53 may be expanded by extending the entanglement prevention rib 5 in a bank shape along the periphery of the floss winding body 3 as shown in FIG. 6, for example. The entanglement prevention ribs 5 extending in a bank shape may be divided at appropriate intervals, or may be continuous without interruption so as to surround the entire circumference of the floss winding body 3.

Further, as shown in FIG. 7, the flange portions 32 are formed at both ends of the winding core 31 of the floss winding body 3, and the flange portion 32 on the top surface portion 25 side is formed on the inner surface of the top surface portion 25 facing the bottom surface portion 24. The entanglement preventing ribs 5 may be provided at one place or at a plurality of places so as to surround the. On the entanglement prevention rib 5 on the top surface portion 25 side, a winding guide surface 53 extending obliquely from the inner surface of the top surface portion 25 toward the shaft portion 4 side is formed. By adopting such a configuration, it is possible to prevent the entanglement of floss and the entanglement with the shaft portion 4 more thoroughly.

The invention disclosed in the present application can be used for a dental floss case that holds a bobbin-shaped dental floss in a portable manner.

DESCRIPTION OF SYMBOLS 1 Dental floss case 2 Case body 21 Case half body 22 Case half body 23 Hinge part 24 Bottom part 25 Top surface part 26 Drawout port 27 Cutter 3 Floss winding body 31 Core core 32 Collar part 4 Shaft part 5 Entanglement prevention rib 51 Base part 52 Standing part 53 Winding guide surface

Claims

A floss winding body having a cylindrical winding core wound with floss and a case main body accommodating the floss winding body are provided, and the winding core is rotatable on a shaft portion provided inside the case main body. A dental floss case configured to be pulled out from an outlet provided on a side surface of the case body,
The shaft portion is provided on the inner surface of the bottom portion of the case body,
The winding core has a disk-shaped collar portion at one end thereof, and is attached to the shaft portion such that the collar portion is brought into contact with the inner surface of the bottom surface portion of the case body,
On the inner surface of the bottom surface of the case body, at least one entanglement prevention rib is provided so as to be proximate to the peripheral edge of the collar portion,
The dental floss case, wherein the entanglement prevention rib is formed with a winding guide surface that extends obliquely from the inner surface of the bottom surface portion toward the shaft portion side.
In the dental floss case according to claim 1,
The dental floss case, wherein the entanglement prevention ribs are radially arranged at a plurality of locations around the shaft portion.
In the dental floss case according to claim 1 or 2,
The top surface inner surface facing the bottom surface inner surface of the case body is formed flat,
A dental floss case characterized in that a gap through which the floss can pass is provided between the upper end of the shaft portion and the other end of the winding core and the inner surface of the top surface portion.
In the dental floss case according to claim 3,
The dental floss case, wherein the rising height of the entanglement prevention rib is equal to or larger than the size of the gap provided between the other end of the winding core and the inner surface of the top surface portion.
In the dental floss case according to claim 1 or 2,
The winding core has a disk-shaped collar portion at the other end,
On the inner surface of the top surface portion facing the inner surface of the bottom surface portion of the case main body, at least one entanglement preventing rib is provided in proximity to the peripheral edge of the flange portion on the other end side,
The dental floss case characterized in that a winding guide surface is formed on the entanglement prevention rib projectingly provided on the top surface side so as to extend obliquely from the inner surface of the top surface toward the shaft side.