Oral irrigation device

Abstract

To provide an oral cavity washing device capable of further improving convenience.SOLUTION: An oral cavity washing device 1 includes a grip part 20 and a nozzle 30 rotatably attached to the grip part 20. The nozzle 30 includes a stem part 311 attached to the grip part 20 and a tip part 312 extending in a direction intersecting with an extending direction of the stem part 311. An apical surface 3121 of the tip part 312 is formed with a discharge port 321 capable of discharging liquid. The grip part 20 includes a first regulation part 71 for regulating rotation in one direction of the nozzle 30 and a second regulation part 72 for regulation rotation in the other direction of the nozzle 30.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to an oral cleaning device.

Background Art

[0002] As an oral cleaning device, as disclosed in Patent Document 1 below, there is known one including a grip portion that can be held by hand and a nozzle rotatably attached to the grip portion.

[0003] In this Patent Document 1, the nozzle has a stem portion attached to the grip portion and a tip portion extending in a direction intersecting the extending direction of the stem portion, and the tip has a bent shape. Further, a discharge port capable of discharging liquid is formed on the tip surface of the tip portion, and by discharging the liquid supplied into the nozzle from the discharge port, the inside of the oral cavity can be cleaned.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above conventional technology, the nozzle is attached to the grip portion in a state where it can be rotated by 360 degrees or more. Therefore, when using the oral cleaning device, the nozzle may rotate largely unintentionally.

[0006] Here, in the above conventional technology, the tip portion of the nozzle is bent with respect to the stem portion, and a discharge port is formed on the tip surface of the bent tip portion. Therefore, if the nozzle rotates largely, the position of the discharge port also changes greatly, and there is a risk that the liquid cannot be appropriately discharged to the part to be cleaned in the oral cavity.

[0007] Thus, the conventional technology described above may result in a deterioration of the usability of the oral irrigation device.

[0008] Therefore, the purpose of this disclosure is to provide an oral irrigation device that can be made more user-friendly. [Means for solving the problem]

[0009] An oral rinsing device according to one aspect of the present disclosure comprises a gripping portion and a nozzle rotatably attached to the gripping portion, wherein the nozzle has a stem portion attached to the gripping portion and a tip portion extending in a direction intersecting the extending direction of the stem portion, and a discharge port capable of discharging liquid is formed on the tip surface of the tip portion, and the gripping portion has a first restricting portion that restricts rotation of the nozzle in one direction and a second restricting portion that restricts rotation of the nozzle in the other direction. [Effects of the Invention]

[0010] According to this disclosure, it is possible to obtain an oral irrigation device that can be made more user-friendly. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view from one direction of an example of an oral irrigation device according to an embodiment. [Figure 2] This is a perspective view of an example of an oral irrigation device according to an embodiment, viewed from another direction. [Figure 3] This figure shows an example of a gripping part and nozzle according to an embodiment, and is a perspective view showing the nozzle in a state where it can rotate in both left and right directions. [Figure 4] This figure shows an example of a gripping part and nozzle according to an embodiment, and is a perspective view showing a state in which the rotation of the nozzle to the left is restricted. [Figure 5] This figure shows an example of a gripping part and nozzle according to an embodiment, and is a perspective view showing a state in which the rotation of the nozzle to the right is restricted. [Figure 6] It is a perspective view showing the inside of the gripping part according to the embodiment. [Figure 7] It is a diagram for explaining a method of restricting the rotation of the nozzle by the first and second restricting parts and the first and second contact walls according to the embodiment, and is a cross-sectional view showing a state where the first restricting part and the first contact wall are not in contact and the second restricting part and the second contact wall are not in contact. [Figure 8] It is a diagram for explaining a method of restricting the rotation of the nozzle by the first and second restricting parts and the first and second contact walls according to the embodiment, and is a cross-sectional view showing a state where the first restricting part and the first contact wall are in contact. [Figure 9] It is a diagram for explaining a method of restricting the rotation of the nozzle by the first and second restricting parts and the first and second contact walls according to the embodiment, and is a cross-sectional view showing a state where the second restricting part and the second contact wall are in contact. [Figure 10] It is a perspective view showing an enlarged example of the tip of the nozzle according to the embodiment. [Figure 11] It is a cross-sectional view showing the usage state of the nozzle shown as an example. [Figure 12] It is a cross-sectional view showing the usage state of the nozzle shown as a modified example. [Figure 13] It is a perspective view showing an enlarged modified example of the tip of the nozzle. [Figure 14] It is a perspective view showing a modified example of the oral cavity cleaning device.

Embodiments for Carrying Out the Invention

[0012] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, a more detailed description than necessary may be omitted. For example, a detailed description of already well-known matters or a redundant description of substantially the same configuration may be omitted.

[0013] Note that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0014] In the following embodiments, the vertical direction of the oral cavity cleaning device will be defined and described in a state where the extending direction of the stem portion is aligned with the vertical direction while the tip portion of the nozzle is facing upward. Also, the direction in which the liquid is discharged from the discharge portion will be defined as the front side for description.

[0015] (Embodiment) Hereinafter, a nozzle for an oral cavity cleaning device and an oral cavity cleaning device according to an embodiment will be described.

[0016] As shown in FIGS. 1 and 2, the oral cavity cleaning device 1 according to the present embodiment includes a device main body 10 having a case 11, a grip portion (holding portion) 20 that can be held by a user or the like by hand, and a nozzle (nozzle for an oral cavity cleaning device) 30 attached to the grip portion 20. This oral cavity cleaning device 1 is a device that discharges (ejects) a liquid such as water from a discharge port 321 described later of the nozzle 30 and applies a liquid flow to teeth 90 in the oral cavity to clean the oral cavity.

[0017] Here, in the present embodiment, the nozzle 30 includes a nozzle main body 31. The nozzle main body 31 includes an elongated stem portion 311 in the vertical direction and a tip portion 312 continuously provided at the upper end of the stem portion 311 so as to extend in a direction intersecting the extending direction of the stem portion 311. Thus, in the present embodiment, the nozzle 30 has a shape with a bent tip.

[0018] And in the present embodiment, as shown in FIGS. 3 to 5, the nozzle 30 having a bent tip is rotatably attached to the grip portion 20.

[0019] As shown in FIG. 1, the grip portion 20 and the nozzle 30 are connected to the case 11 of the device main body 10 via a hose 13.

[0020] The main body of the device 10 comprises the case 11 described above and a liquid storage tank (liquid storage section) 12 capable of storing liquid, and is roughly in the shape of a rectangular parallelepiped. The case 11 and the liquid storage tank 12 can be formed using materials such as synthetic resin, but are not limited to these and can be formed using a variety of materials.

[0021] Furthermore, a pump (not shown) is built into the case 11, and the liquid storage tank 12 and the hose 13 are connected via the pump. The liquid stored in the liquid storage tank 12 is then supplied to the hose 13 via the pump. For example, a piston pump can be used as such. However, the type of pump is not particularly limited.

[0022] Furthermore, the main unit 10 of the device does not need to have a liquid storage tank 12; for example, it is possible to directly draw in liquid such as tap water from an external source.

[0023] Furthermore, in this embodiment, the case 11 is provided with a grip holding part 11a for holding the grip part 20 when the oral irrigation device 1 (device body 10) is not in use, and a hose holding part 11b for wrapping and holding the hose 13. In addition, a control board and the like, which act as a control unit for controlling the operation of the pump and the like, are installed inside the case 11.

[0024] Furthermore, wiring 14 and a power cord 15 are connected to the case 11, and power to operate the pump and other components is supplied from the outside via the power cord 15. In addition, a stepping motor (rotating part) 40, a control unit 60, and an imaging sensor 80, which will be described later, are connected to the end of the wiring 14, and power is supplied to each component via the wiring 14.

[0025] Furthermore, as shown in Figure 2, case 11 is provided with a power switch 16 for switching the power on and off, and hydraulic pressure switches 17a and 17b for switching the hydraulic pressure of the liquid discharged (spurted) from the nozzle 30. Therefore, in the oral irrigation device 1 according to this embodiment, by operating the hydraulic pressure switches 17a and 17b while the power is turned on by operating the power switch 16, the liquid can be discharged (spurted) from the nozzle 30 at the desired hydraulic pressure.

[0026] As shown in Figures 3 to 5, the grip portion 20 includes a housing 21 that constitutes the outer casing. This housing 21 can be formed, for example, using an insulating synthetic resin material.

[0027] Furthermore, in this embodiment, as shown in Figure 6, the housing 21 is formed by joining together a plurality of divided parts, and a cavity is formed inside the housing 21 formed by joining the divided parts. Various electrical components are housed in this cavity. These various electrical components include a stepping motor (rotating part) 40 and a control unit 60.

[0028] Furthermore, in this embodiment, the grip portion 20 is equipped with an operating switch 20a, part of which is exposed on the surface side. By operating the operating switch 20a while holding the grip portion 20, the user can switch the liquid spray on or off.

[0029] Furthermore, the nozzle 30 has a first through-hole 32 that penetrates in the longitudinal direction, and a hose 13 is connected to the opening at the base of the stem portion 311 in the first through-hole 32. In this way, the liquid in the liquid storage tank 12 is supplied to the first through-hole 32 via the hose 13. The liquid supplied to the first through-hole 32 via the hose 13 then passes through the first through-hole 32 and is discharged (spurted) to the outside from an opening (discharge port 321) formed on the tip surface 3121 of the tip portion 312. In this way, by discharging (spurting) the liquid to the outside from the discharge port 321 and directing it, for example, onto the teeth 90 in the oral cavity, oral cleaning can be performed.

[0030] While water can be used as the liquid dispensed (sprayed) into the oral cavity, it is not limited to water; various liquids can be used. For example, a cleaning solution containing a cleaning agent mixed with water can be used.

[0031] Thus, in this embodiment, the first through-hole 32 is formed in the nozzle 30 and serves as a flow path for the liquid. Alternatively, a flow path may be formed in the nozzle 30 by inserting a hose 13 into the first through-hole 32. In this case, the inner space of the hose 13 within the first through-hole 32 becomes the flow path.

[0032] The nozzle 30 is rotatably mounted on the upper side of the grip portion 20. Furthermore, in this embodiment, a rotating part for rotating the nozzle 30 is housed within the housing 21 of the grip portion 20, and by operating this rotating part, the nozzle 30 rotates relative to the grip portion 20.

[0033] Specifically, a stepping motor 40, which acts as the rotating part, is housed within the housing 21, and the base of the stem portion 311 of the nozzle 30 is connected to the pivot shaft 41 of the stepping motor 40. This arrangement allows the nozzle 30 to rotate together with the pivot shaft 41 when the stepping motor 40 is activated and the pivot shaft 41 is rotated. In this embodiment, a bearing 50 is attached to the base of the stem portion 311, so that when the nozzle 30 is attached to the grip portion 20, the stem portion 311 is sandwiched between the housing 21 via the bearing 50. This allows the nozzle 30 to rotate more smoothly relative to the grip portion 20.

[0034] Furthermore, in this embodiment, the operation of the stepping motor 40 is controlled by the control unit 60. This allows for more precise adjustment of the rotation angle. Thus, in this embodiment, the rotation of the nozzle 30 is performed automatically, minimizing the movement of the grip portion 20 when the oral irrigation device 1 is in use.

[0035] In this embodiment, the nozzle 30 has a shape in which the tip portion 312 having the discharge port 321 is bent relative to the stem portion 311. When a nozzle 30 of this shape is used, there is a risk that the nozzle 30 may rotate unintentionally when the oral irrigator 1 is in use. For example, if the control unit 60 misrecognizes the rotation angle or malfunctions in control, the nozzle 30 may rotate significantly while the oral irrigator 1 is in use. If the nozzle 30 rotates significantly while the oral irrigator 1 is in use, the position of the discharge port 321 will also change significantly, and there is a risk that the liquid will not be properly discharged to the area of ​​the mouth that is to be cleaned. In addition, the liquid discharged from the discharge port 321 may not be discharged into the mouth but may splash outside the mouth, potentially splashing onto the floor or the user's body. These problems may also occur even when the rotation of the nozzle 30 is performed manually.

[0036] Thus, simply attaching the nozzle 30 to the grip portion 20 in a rotatable manner (attaching it in a way that allows it to rotate more than 360 degrees) may worsen the usability of the oral irrigation device 1.

[0037] Therefore, in this embodiment, the usability of the oral irrigation device 1 can be further improved.

[0038] Specifically, the grip portion 20 is provided with a first restricting portion that restricts the rotation of the nozzle 30 to the left (one direction), and a second restricting portion that restricts the rotation of the nozzle 30 to the right (other direction).

[0039] In this embodiment, a left-side limit switch 71, which serves as the first restricting unit, and a right-side limit switch 72, which serves as the second restricting unit, are provided on the grip portion 20.

[0040] Furthermore, when the nozzle 30 is rotated by a predetermined angle to the left (in one direction) from a predetermined position (reference position), the left limit switch 71 is operated. When the left limit switch 71 is operated, further rotation of the nozzle 30 to the left (in one direction) is restricted.

[0041] In this embodiment, the left limit switch 71 is electrically connected to the control unit 60, and this left limit switch 71 is equipped with an operation switch 71a. When the control unit 60 detects that the operation switch 71a has been pressed, the control unit 60 controls the rotation of the stepping motor 40 so as not to rotate the pivot shaft 41 any further to the left (one direction).

[0042] Furthermore, in this embodiment, when the nozzle 30 is rotated by a predetermined angle to the left (in one direction) from a predetermined position (reference position), the operating switch 71a of the left limit switch 71 is pressed by the nozzle 30.

[0043] In this way, when the nozzle 30 is rotated by a predetermined angle to the left (in one direction) from a predetermined position (reference position), further rotation of the nozzle 30 to the left (in one direction) is restricted.

[0044] Similarly, when the nozzle 30 is rotated by a predetermined angle to the right (in another direction) from a predetermined position (reference position), the right-side limit switch 72 is operated. When the right-side limit switch 72 is operated, further rotation of the nozzle 30 to the right (in another direction) is restricted.

[0045] In this embodiment, the right-side limit switch 72 is electrically connected to the control unit 60, and this right-side limit switch 72 is equipped with an operating switch 72a. When the control unit 60 detects that the operating switch 72a has been pressed, the control unit 60 controls the rotation of the stepping motor 40 so as not to rotate the pivot shaft 41 any further to the right (or in the other direction).

[0046] Furthermore, in this embodiment, when the nozzle 30 is rotated by a predetermined angle to the right (in another direction) from a predetermined position (reference position), the operating switch 72a of the right-side limit switch 72 is pressed by the nozzle 30.

[0047] In this way, when the nozzle 30 is rotated by a predetermined angle to the right (in another direction) from a predetermined position (reference position), further rotation of the nozzle 30 to the right (in another direction) is restricted.

[0048] This ensures that the nozzle 30 is attached to the grip portion 20 in a manner that allows rotation only within a predetermined range.

[0049] In this embodiment, the state shown in Figure 7 is considered the reference state. As shown in Figure 8, the left limit switch 71 is operated when the nozzle 30 is rotated a predetermined angle to the left from the reference state shown in Figure 7. Also, as shown in Figure 9, the right limit switch 72 is operated when the nozzle 30 is rotated a predetermined angle to the right from the reference state shown in Figure 7.

[0050] In this embodiment, both limit switches are operated when the nozzle is rotated 30 degrees from its reference position. This allows the rotation range of the nozzle 30 to be narrowed to 60 degrees by the left limit switch (first restricting part) 71 and the right limit switch (second restricting part) 72.

[0051] Furthermore, in this embodiment, the nozzle 30 is provided with a first contact wall that contacts the left limit switch (first restricting section) 71 and a second contact wall that contacts the right limit switch (second restricting section) 72.

[0052] Specifically, as shown in Figure 6, the nozzle 30 has a cam portion 3111 that is allowed to rotate between the left limit switch (first restricting portion) 71 and the right limit switch (second restricting portion) 72.

[0053] In this embodiment, the contour shape of the cam portion 3111, when viewed along the rotation axis C of the stem portion 311, is teardrop-shaped. Specifically, the contour shape of the cam portion 3111 in plan view includes an arc portion 3111c at the same distance from the rotation axis C, a left straight portion 3111a connected to the left end of the arc portion 3111c, a right straight portion 3111b connected to the right end of the arc portion 3111c, and a connecting portion 3111d connecting the left straight portion 3111a and the right straight portion 3111b. This ensures that the distance from the rotation axis C of the left straight portion 3111a and the right straight portion 3111b increases as they approach the connecting portion 3111d.

[0054] When the nozzle 30 is rotated to the left from the reference state shown in Figure 7, the left straight portion 3111a contacts the operating switch 71a of the left limit switch 71, causing the operating switch 71a to be pressed to the left by the left straight portion 3111a. At this time, it is preferable to make surface contact between the left straight portion 3111a and the operating switch 71a of the left limit switch 71. This ensures that the operating switch 71a of the left limit switch 71 is pressed to the left more reliably by the left straight portion 3111a.

[0055] Similarly, when the nozzle 30 is rotated to the right from the reference state shown in Figure 7, the right straight portion 3111b contacts the operating switch 72a of the right limit switch 72, causing the operating switch 72a to be pressed to the right by the right straight portion 3111b. In this case, it is preferable to make surface contact between the right straight portion 3111b and the operating switch 72a of the right limit switch 72. This ensures that the operating switch 72a of the right limit switch 72 is pressed to the right more reliably by the right straight portion 3111b.

[0056] Thus, in this embodiment, the cam portion 3111 provided on the base side of the stem portion 311 has a left straight portion 3111a as a first contact wall and a right straight portion 3111b as a second contact wall. This makes it possible to restrict the rotation of the nozzle 30 in both left and right directions with a single component, thereby simplifying the structure and reducing the number of parts.

[0057] As described above, in this embodiment, the rotation range of the nozzle 30 is narrowed by the left limit switch (first restricting part) 71 and the right limit switch (second restricting part) 72. This prevents the nozzle 30 from rotating unintentionally when the oral irrigator 1 is in use, preventing it from rotating beyond a predetermined range. In other words, it prevents the nozzle 30 from rotating too far. By preventing the nozzle 30 from rotating too far, it prevents the liquid from being discharged in an unintended direction and splashing outside the mouth when the oral irrigator 1 is in use.

[0058] This allows the liquid to be dispensed more effectively to the area of ​​the mouth that needs cleaning, thereby improving the usability of the oral irrigation device 1.

[0059] Furthermore, in this embodiment, an imaging sensor 80 capable of capturing images of the inside of the oral cavity is provided in the portion of the tip surface 3121 of the nozzle 30 where the discharge port 321 is not formed.

[0060] Specifically, the nozzle 30 has a second through-hole 33 that penetrates in the longitudinal direction, located at a different location from the first through-hole 32. The imaging sensor 80 is positioned inside the second through-hole 33 with its lens exposed from the opening on the tip end 312 side of the nozzle 30 (an opening formed on the tip surface 3121), as shown in Figure 11. At this time, the tip surface 3121 is formed such that the discharge port 321 and the imaging sensor 80 are aligned vertically, as shown in Figure 10. In this embodiment, the discharge port 321 is formed on the upper side.

[0061] Furthermore, wiring 81 connected to the image sensor 80 is located on the side of the second through-hole 33 closer to the image sensor 80. Thus, in this embodiment, the second through-hole 33 serves as an image sensor path through which wiring 81 connected to the image sensor 80 is located.

[0062] The imaging sensor path (second through-hole 33) and the flow path (first through-hole 32) are formed parallel to each other in the stem portion 311. This prevents the stem portion 311 from becoming excessively large in the radial direction.

[0063] Furthermore, when the nozzle 30 is rotated, the second through-hole (image sensor path) 33 and the first through-hole (flow path) 32 also rotate together with the nozzle 30. At this time, both the second through-hole (image sensor path) 33 and the first through-hole (flow path) 32 are formed at positions away from the rotation axis C. Therefore, when the nozzle 30 is rotated, there is a risk that the hose 13 and wiring 81 may become entangled or broken. However, in this embodiment, the rotation range of the nozzle 30 is narrowed, so that the hose 13 and wiring 81 do not become entangled or broken.

[0064] Furthermore, in this embodiment, the control unit 60 controls the rotation of the nozzle 30 by the stepping motor 40 based on the image captured by the imaging sensor 80. For example, the control unit 60 can analyze the image captured by the imaging sensor 80 to determine areas that need to be cleaned by discharging liquid, and then control the rotation of the nozzle 30 so that the liquid can be discharged towards those areas.

[0065] In this embodiment, the image sensor 80 is used to image the object to be cleaned, and the control unit 60 determines the areas that need to be cleaned by discharging liquid based on the image captured by the image sensor 80. The control unit 60 then rotates the nozzle 30 by rotating the pivot shaft 41 of the stepping motor 40 so that the discharge port 321 faces the areas that need to be cleaned by discharging liquid. With the discharge port 321 facing the area to be cleaned in the oral cavity, the liquid is then discharged (spurted) from the discharge port 321.

[0066] In this embodiment, the control unit 60 also controls the discharge (squirt) of liquid from the discharge port 321. Specifically, the control unit 60 controls the operation of discharging (squirting) liquid from the discharge port 321, and the operation of interrupting the discharge (squirt) of liquid from the discharge port 321. This allows the imaging sensor 80 to image the object to be cleaned when liquid is not being discharged (squirted) from the discharge port 321. Furthermore, when the discharge port 321 is pointed towards the area of ​​the oral cavity to be cleaned, liquid can be discharged (squirted) from the discharge port 321. It is also possible to have the control of rotating the nozzle 30 and the control of discharging (squirting) liquid from the discharge port 321 performed by separate control units.

[0067] The oral cavity is then cleaned by repeatedly performing the control described above. In other words, in this embodiment, when using the oral irrigator 1, the liquid is discharged into the oral cavity to clean the target object while performing the control described above. This makes it possible to clean the oral cavity more efficiently. Furthermore, by controlling the rotation of the nozzle 30 based on the image captured by the imaging sensor 80, the effort required to move the grip part 20 when using the oral irrigator 1 is minimized, making it possible to clean the oral cavity even more efficiently.

[0068] Thus, when cleaning the inside of the mouth while imaging the object to be cleaned using the imaging sensor 80, it is preferable that the imaging sensor 80 be able to clearly image the object to be cleaned inside the mouth.

[0069] Therefore, in this embodiment, the imaging sensor 80 is used to capture clearer images of the objects to be cleaned inside the oral cavity.

[0070] Specifically, as shown in Figure 10, a protrusion 3122 is provided at the tip 312 of the nozzle 30 so as to protrude forward from the tip surface 3121 (in the direction normal to the tip surface 3121). When using the oral irrigation device 1, as shown in Figure 11, the tip of the protrusion 3122 is brought into contact with the object to be cleaned in the oral cavity (in Figure 11, the tooth surface 91 of the tooth 90), allowing the tooth surface 91 to be imaged by the imaging sensor 80. This prevents the distance between the imaging sensor 80 and the tooth surface (object to be cleaned) 91 from falling below a predetermined distance (the protrusion distance D1 of the protrusion 3122). In other words, a predetermined distance is ensured between the imaging sensor 80 and the tooth surface (object to be cleaned) 91. This prevents the position of the tooth surface 91, which is the object to be imaged, from deviating significantly from the focus of the imaging sensor 80, allowing for clearer imaging of the tooth surface 91.

[0071] In this embodiment, the protrusion 3122 is formed to surround the image sensor 80 along the edge 3121a of the tip surface 3121. A notch 3123 is formed at the lower end of the protrusion 3122, which is cut out up to the tip surface 3121. Thus, in this embodiment, the protrusion 3122 is provided to surround the image sensor 80 with a portion of it cut out. In this case, the protrusion 3122 is designed so that the peripheral portion of the image sensor 80 is cut out. That is, the protrusion 3122 has a shape in which the peripheral portion of the image sensor 80 is cut out.

[0072] This prevents liquid from accumulating on the lens of the image sensor 80.

[0073] Furthermore, in this embodiment, as described above, the protrusion 3122 is provided along the edge 3121a of the tip surface 3121.

[0074] This design ensures that the protrusion 3122 does not extend beyond the edge 3121a of the tip surface 3121, thereby increasing the contact area with the tooth surface (object to be cleaned) 91. By preventing the protrusion 3122 from extending beyond the edge 3121a of the tip surface 3121, the size of the tip 312, which is inserted into the oral cavity, can be suppressed, minimizing any discomfort that may occur when using the oral irrigator 1 (when the tip 312 is inserted into the oral cavity). Furthermore, since the formation of a protrusion on the tip 312 of the nozzle 30 is suppressed, the oral irrigator 1 can be used more safely. In addition, by increasing the contact area between the protrusion 3122 and the tooth surface (object to be cleaned) 91, the nozzle 30 is less likely to wobble when using the oral irrigator 1 (when the tip of the protrusion 3122 is brought into contact with the object to be cleaned).

[0075] This makes it easier to maintain the position where the tip of the protrusion 3122 is in contact with the tooth surface (object to be cleaned) 91 when using the oral irrigation device 1, thereby suppressing blurred images when the tooth surface (object to be cleaned) 91 is imaged by the imaging sensor 80.

[0076] Thus, in this embodiment, the nozzle 30 can be used in a more stable state while enabling clearer imaging of the tooth surface 91, which is the object to be cleaned.

[0077] In this embodiment, the nozzle 30 (stem portion 311 and tip portion 312) is formed in a cylindrical shape, and the tip surface 3121 is circular in shape. Therefore, in this embodiment, the protruding portion 3122 has a curved shape that follows the circumference of the edge 3121a of the tip surface 3121. Furthermore, in this embodiment, as shown in Figure 11, the tip of the protruding portion 3122 has a curved shape that is convex forward. This minimizes the formation of edges on the nozzle 30, making the oral irrigation device 1 safer to use. In this way, this embodiment achieves both stability in ensuring the distance between the imaging sensor 80 and the tooth surface 91 and safety in the oral cavity.

[0078] Furthermore, in this embodiment, the projection distance D1 from the tip surface 3121 of the projection 3122 is made to be the same as the distance from the tip surface 3121 to the focal point D of the image sensor 80.

[0079] This allows the tooth surface (object to be cleaned) 91 to be positioned at the focal point D of the imaging sensor 80 when the protrusion 3122 is brought into contact with the tooth surface (object to be cleaned) 91. This also allows for clearer imaging of the tooth surface 91, which is the object to be cleaned.

[0080] Furthermore, the first through-hole (flow channel) 32 formed in the nozzle body 31 is designed so that liquid is discharged (ejected) from the discharge port 321 toward the normal L1 of the imaging sensor 80.

[0081] In this embodiment, as shown in Figure 11, the first through-hole 32 formed in the tip portion 312 of the nozzle 30 is inclined so as it approaches the discharge port 321, it moves closer to the image sensor 80. This causes the liquid to be discharged (spurted) from the discharge port 321 toward the normal L1 of the image sensor 80, making it possible to discharge (spurt) the liquid near the area captured by the image sensor 80. In this embodiment, the normal L1 of the image sensor 80 is the normal of the surface exposed from the tip surface 3121 of the image sensor 80, and the normal L1 of the image sensor 80 extends in the direction of the normal of the tip surface 3121.

[0082] Furthermore, the projection distance D1 of the projection portion 3122 from the tip surface 3121 can be made to be the same as the distance to the intersection point P of the straight line L2 extending from the tip surface 3121 in the direction of liquid discharge and the normal L1 of the imaging sensor 80, as shown in Figure 12.

[0083] This allows the area captured by the imaging sensor 80 to coincide with the area from which the liquid is discharged. In other words, the area from which the liquid is discharged can be captured by the imaging sensor 80.

[0084] Furthermore, in Figure 12, the projection distance D1 of the projection 3122 from the tip surface 3121 is set to be the same as the distance from the tip surface 3121 to the focal point D of the image sensor 80.

[0085] This allows the image sensor 80 to focus on the area where the liquid is ejected, enabling the capture of clearer images.

[0086] This will allow you to clean your mouth more efficiently.

[0087] The shape of the protruding portion 3122 is not limited to the shape described above, and can be of various shapes. For example, the protruding portion 3122 shown in Figure 13 is possible.

[0088] The protrusion 3122 shown in Figure 13 is also formed to surround the image sensor 80 along the edge 3121a of the tip surface 3121. Furthermore, the protrusion 3122 shown in Figure 13 is also provided to surround the image sensor 80 with a portion of it cut out.

[0089] Here, the protruding portion 3122 shown in Figure 13 is provided so as to surround the image sensor 80 with two (or more) cutouts. Specifically, notches 3123 are formed at the upper and lower ends of the protruding portion 3122, extending to the tip surface 3121.

[0090] This allows the liquid on the lens of the image sensor 80 to be discharged from both above and below (various directions). Furthermore, it prevents liquid from accumulating on the lens of the image sensor 80, even when the nozzle 30 is used in various positions.

[0091] Thus, by using the protruding portion 3122 shown in Figure 13, it becomes possible to clean the inside of the mouth more efficiently.

[0092] Furthermore, the protruding portion 3122 shown in Figure 13 is also designed so that the peripheral portion of the image sensor 80 is cut out. In other words, the protruding portion 3122 shown in Figure 13 also has a shape in which the peripheral portion of the image sensor 80 is cut out.

[0093] Furthermore, the projection distance D1 from the tip surface 3121 of the projection 3122 shown in Figure 13 can be set to the distance explained in Figure 11, or it can be set to the distance shown in Figure 12.

[0094] Although Figure 13 illustrates a projection 3122 that surrounds the image sensor 80 with two cutouts, it is also possible to have a projection 3122 that surrounds the image sensor 80 with three or more cutouts.

[0095] Each of the aforementioned protrusions 3122 can have a protrusion distance D1 from the tip surface 3121 of approximately 5 mm to 10 mm.

[0096] Furthermore, the above embodiment illustrates an oral irrigation device 1 in which power for operating a pump and the like is supplied from an external source via a power cord 15. However, the configuration of the oral irrigation device is not limited to this configuration, and various configurations are possible.

[0097] For example, the above configuration can be applied to the oral irrigator 1 shown in Figure 14. In the oral irrigator 1 shown in Figure 14, a liquid storage tank (liquid storage section) 12 is formed in the grip section (gripping section) 20, and a power supply means such as a rechargeable battery is built into the grip section (gripping section) 20. Thus, the oral irrigator 1 shown in Figure 14 is an oral irrigator that can be used without using an external power source.

[0098] Furthermore, by applying the above-described configuration to the oral irrigation device 1 shown in Figure 14, usability can be further improved.

[0099] Furthermore, the above configuration can also be applied to a tank-type retractable oral irrigation device.

[0100] The oral irrigation device 1 described above can be used, for example, as follows.

[0101] First, the user grasps the grip portion 20 and inserts the tip portion 312 of the nozzle 30 into the oral cavity, bringing the tip of the protruding portion 3122 into contact with the tooth surface 91 of the tooth 90.

[0102] Next, the user or other person operates the operation switch 20a to turn it on while holding the grip portion 20. Then, the tooth surface 91 is imaged by the imaging sensor 80. At this time, the protrusion 3122 ensures a predetermined distance between the imaging sensor 80 and the tooth surface (object to be cleaned) 91, and the tooth surface 91 is imaged in this state.

[0103] Next, the control unit 60 determines, based on the image captured by the imaging sensor 80, the area that needs to be cleaned by discharging liquid. The control unit 60 then rotates the nozzle 30 by rotating the pivot shaft 41 of the stepping motor 40 so that the discharge port 321 faces the area that needs to be cleaned by discharging liquid. At this time, the nozzle 30 will rotate within a predetermined range. Therefore, for example, if the left straight section (first contact wall) 3111a comes into contact with the left limit switch (first restricting section) 71 while the nozzle 321 is being rotated to face the area that needs to be cleaned by discharging liquid, the control unit 60 will control the nozzle to stop further rotation to the left. Similarly, if the right straight section (second contact wall) 3111b comes into contact with the right limit switch (second restricting section) 72, the control unit 60 will control the nozzle to stop further rotation to the right.

[0104] It is preferable to set the rotation range of the nozzle 30 to be greater than the rotation angle when it is rotated from one end to the other of the region corresponding to the image captured on the tooth surface (object to be cleaned) 91. This makes it possible to direct the discharge port 321 to a desired location within the region corresponding to the image captured on the tooth surface (object to be cleaned) 91 without restricting the rotation of the nozzle 30.

[0105] Next, with the nozzle 321 pointed towards the area of ​​the oral cavity to be cleaned, liquid is discharged (squirted) from the nozzle 321. This cleans the tooth surface 91. At this time, the liquid discharged (squirted) from the nozzle 321 and adhering to the lens of the image sensor 80 is discharged to the outside through the notch 3123 formed around the periphery of the image sensor 80. Therefore, even if the image sensor 80 images the tooth surface 91 after interrupting the discharge (squirting) of liquid from the nozzle 321, the imaging of the tooth surface 91 will not be obstructed by the liquid accumulated on the lens.

[0106] The oral cavity is then cleaned by repeatedly performing the actions described above. Note that the above method of using the oral irrigation device 1 is merely one example, and the oral irrigation device 1 can be used in various ways.

[0107] [Effects / Effects] The following describes the characteristic configuration of the oral irrigation device shown in the above embodiment and its modifications, and the effects obtained thereby.

[0108] The oral irrigation device 1 shown in the above embodiment and its modified form comprises a grip portion (gripping portion) 20 and a nozzle 30 rotatably attached to the grip portion (gripping portion) 20.

[0109] Furthermore, the nozzle 30 has a stem portion 311 attached to the grip portion (handling portion) 20, and a tip portion 312 extending in a direction intersecting the extending direction of the stem portion 311. In addition, a discharge port 321 capable of discharging liquid is formed on the tip surface 3121 of the tip portion 312.

[0110] The grip portion 20 includes a left-side limit switch (first restricting portion) 71 that restricts the rotation of the nozzle 30 to the left (one direction), and a right-side limit switch (second restricting portion) 72 that restricts the rotation of the nozzle 30 to the right (other direction).

[0111] This allows the rotation range of the nozzle 30 to be narrowed by the left limit switch (first restrictor) 71 and the right limit switch (second restrictor) 72. Therefore, even if the nozzle 30 rotates unintentionally when using the oral irrigator 1, it is possible to prevent it from rotating beyond a predetermined range. In other words, it is possible to prevent the nozzle 30 from rotating too much. This prevents the liquid from being discharged in an unintended direction when using the oral irrigator 1, and allows the liquid to be discharged more appropriately to the area of ​​the mouth that is to be cleaned.

[0112] Thus, according to the above embodiment and its modifications, an oral irrigation device 1 that can be made more user-friendly can be obtained.

[0113] Furthermore, the nozzle 30 may have a left straight section (first contact wall) 3111a that contacts the left limit switch (first restricting section) 71, and a right straight section (second contact wall) 3111b that contacts the right limit switch (second restricting section) 72.

[0114] In this way, by providing the left straight section (first contact wall) 3111a and the right straight section (second contact wall) 3111b, which restrict the rotation range of the nozzle 30, on the nozzle 30 itself, it becomes possible to suppress the relative movement of each wall section with respect to the nozzle 30. As a result, it becomes possible to more reliably restrict the rotation of the nozzle 30 beyond a predetermined angle to the left and beyond a predetermined angle to the right, thereby more reliably suppressing the nozzle 30 from rotating excessively.

[0115] Furthermore, the nozzle 30 may have a cam portion 3111 that is allowed to rotate between the left limit switch (first restricting portion) 71 and the right limit switch (second restricting portion) 72. The cam portion 3111 may also be provided with a left straight portion (first contact wall) 3111a and a right straight portion (second contact wall) 3111b.

[0116] This makes it possible to restrict the rotation of the nozzle 30 in both left-right and right directions (one direction and the other direction) with a single component, thereby simplifying the configuration of the oral irrigation device 1 and reducing the number of parts.

[0117] Alternatively, the left straight section (first contact wall) 3111a may be made to make surface contact with the left limit switch (first regulating section) 71.

[0118] This allows the left-side limit switch (first restricting section) 71 to more reliably restrict the rotation of the nozzle 30 to the left (one direction). Furthermore, when the left-side limit switch 71 is used as the first restricting section, the left-side straight section (first contact wall) 3111a can operate the left-side limit switch (first restricting section) 71 more reliably, thus making it possible to more reliably restrict the rotation of the nozzle 30 to the left (one direction).

[0119] Alternatively, the right-side straight section (second contact wall) 3111b may be made to make surface contact with the right-side limit switch (second restricting section) 72.

[0120] This allows the rotation of the nozzle 30 to the right (or other direction) to be more reliably restricted by the right-side limit switch (second restricting section) 72. Furthermore, when the right-side limit switch 72 is used as the second restricting section, the operation of the right-side limit switch (second restricting section) 72 by the right-side straight section (second contact wall) 3111b can be performed more reliably, thus making it possible to more reliably restrict the rotation of the nozzle 30 to the right (or other direction).

[0121] Furthermore, the oral irrigation device 1 may further include a stepping motor (rotating part) 40 having a pivot shaft 41 connected to the nozzle 30 and capable of rotating the nozzle 30. The oral irrigation device 1 may further include a control unit 60 that controls the rotation of the stepping motor (rotating part) 40.

[0122] This minimizes the need to manually move the nozzle 30 during use, allowing for more efficient cleaning of the oral cavity.

[0123] Furthermore, an imaging sensor 80 may be provided at the tip of the nozzle 30. The control unit 60 may then control the rotation of the nozzle 30 by the stepping motor (rotating part) 40 based on the image captured by the imaging sensor 80.

[0124] As described above, by providing an image sensor 80 at the tip of the nozzle 30, it becomes possible to remove dirt from the oral cavity based on the image captured by the image sensor 80, thereby enabling more efficient cleaning of the oral cavity. At this time, if the rotation of the nozzle 30 is controlled by the control unit 60 based on the image captured by the image sensor 80, the liquid can be discharged more precisely towards the dirt to be removed compared to when the nozzle 30 is rotated manually. Thus, by providing an image sensor 80 at the tip of the nozzle 30 and automatically rotating the nozzle 30 based on the image captured by the image sensor 80, it becomes possible to clean the oral cavity more efficiently.

[0125] Furthermore, the nozzle 30 may have a first through-hole (flow path) 32 through which liquid passes, and a second through-hole (image sensor path) 33 through which wiring 81 connected to the image sensor 80 is located. The stepping motor (rotating part) 40 may rotate the nozzle 30 together with the second through-hole (image sensor path) 33 and the first through-hole (flow path) 32.

[0126] Thus, even if the second through-hole (imaging sensor path) 33 and the first through-hole (flow channel) 32 are rotated when the nozzle 30 is rotated, the range of rotation of the nozzle 30 is limited in the oral irrigation device 1 shown in the above embodiment and its modified form. Therefore, it is possible to suppress the wiring 81 located in the second through-hole (imaging sensor path) 33 and the hose 13 connected to the first through-hole (flow channel) 32 from becoming entangled or broken.

[0127] Alternatively, the rotating part may be a stepping motor 40.

[0128] By using a stepping motor 40 as a means of rotating the nozzle 30, it becomes possible to adjust the rotation angle of the nozzle 30 with greater precision.

[0129] [others] The contents of the oral irrigation device relating to this disclosure have been described above. However, the embodiments and their modifications described above are for illustrative purposes only and may be modified, replaced, added, or omitted within the scope of the claims or their equivalents.

[0130] For example, it is possible to create an oral irrigation device by appropriately combining the configurations described in the above embodiment and its modified form.

[0131] Furthermore, in the above embodiment and its modified examples, the control unit 60 controls the rotation of the nozzle 30 by the stepping motor (rotating part) 40 based on the image captured by the imaging sensor 80. However, the configuration is not limited to this, and it is also possible for the control unit 60 to simply control the rotation of the nozzle 30 by the stepping motor (rotating part) 40.

[0132] Furthermore, the above embodiment and its modifications illustrate a configuration in which the nozzle 30 can be automatically rotated using a stepping motor (rotating part) 40. However, the configuration is not limited to this, and for example, an oral irrigation device in which the nozzle 30 is rotated manually is also possible.

[0133] Furthermore, the above embodiment and its modified examples illustrate a configuration in which the nozzle 30 itself is provided with a first contact wall 3111a and a second contact wall 3111b. However, the configuration is not limited to this, and for example, the first and second contact walls can be provided on the pivot shaft 41 of the stepping motor 40 to which the nozzle 30 is connected and which rotates together with the nozzle 30.

[0134] Furthermore, the above embodiment and its modifications illustrate a configuration in which the rotation of the nozzle 30 is restricted using a left limit switch 71 and a right limit switch 72. However, the configuration is not limited to this, and for example, it is possible to use a simple wall (a wall without a switch function) as the first and second restricting parts to mechanically restrict the rotation of the nozzle 30. In this case, it is also possible to provide the first and second restricting parts that protrude inward on the inner surface of the housing 21 of the grip part (gripping part) 20, or to make the inner surface of the housing 21 of the grip part (gripping part) 20 function as the first and second restricting parts. If the inner surface of the housing 21 is made to function as the first and second restricting parts, it becomes possible to further simplify the configuration.

[0135] Furthermore, although the above embodiment and its modifications illustrate a device in which an imaging sensor 80 is provided on the tip surface 3121, it is also possible to construct an oral irrigation device 1 in which an imaging sensor 80 is not provided on the tip surface 3121.

[0136] Furthermore, the above embodiment and its modifications illustrate a configuration in which a projection 3122 is provided along the edge 3121a of the tip surface 3121. However, the configuration is not limited to this, and projections 3122 of various shapes can be provided at various positions. For example, it is possible to provide a projection 3122 on the inside of the edge 3121a, or to provide a projection 3122 that protrudes outside the edge 3121a. It is also possible to provide a linear projection 3122 instead of an arc shape.

[0137] Furthermore, while the above embodiment and its modified examples illustrate a configuration in which the image sensor 80 is surrounded by a portion of the protruding portion 3122, it is also possible to have a protruding portion 3122 that continuously surrounds the entire circumference of the image sensor 80.

[0138] Furthermore, the tip surface 3121 may be provided with multiple discharge ports 321 and multiple imaging sensors 80.

[0139] Furthermore, it is also possible to use a nozzle that does not have the protruding portion 3122.

[0140] Furthermore, it is also possible to provide an oral irrigation device in which an imaging sensor 80 is installed on the nozzle 30, allowing the nozzle 30 to be rotated manually. In this case, the user will operate the nozzle 30 so that the liquid is dispensed (sprayed) onto the area to be cleaned after the user has confirmed the image captured by the imaging sensor 80.

[0141] Furthermore, the specifications of the nozzle, gripping part, and other details (shape, size, layout, etc.) can be changed as needed. [Industrial applicability]

[0142] As described above, the oral rinsing device described herein can be made more user-friendly and can therefore be used in various types of oral rinsing devices, including those for home and commercial use. [Explanation of Symbols]

[0143] 1. Oral irrigation device 20. Grip section (handling section) 30 nozzles 311 Stem section 3111 Cam section 3111a Left straight section (1st contact wall) 3111b Right straight section (second contact wall) 312 Tip 3121 Tip surface 3122 Protrusion 32 First through-hole (flow channel) 321 Discharge port 33. Second through-hole (imaging sensor path) 40 Stepping motor (rotating part) 41. Rotary shaft 60 Control Unit 71 Left-side limit switch (first regulating section) 72 Right-side limit switch (second regulating section) 80 imaging sensors 81 Wiring

Claims

1. The gripping part, A nozzle is rotatably attached to the gripping portion, Equipped with, The nozzle has a stem portion attached to the gripping portion and a tip portion extending in a direction intersecting the extending direction of the stem portion. The tip surface of the aforementioned tip is formed with a discharge port from which liquid can be discharged. The gripping portion includes a first restricting portion that restricts the rotation of the nozzle in one direction while allowing rotation in the other direction, and a second restricting portion that restricts the rotation of the nozzle in the other direction while allowing rotation in one direction. Oral irrigation device.

2. The nozzle has a first contact wall that contacts the first restricting portion and a second contact wall that contacts the second restricting portion. The oral irrigation device according to claim 1.

3. The nozzle has a cam portion that is allowed to rotate between the first restricting portion and the second restricting portion, The cam portion is provided with the first contact wall and the second contact wall. The oral irrigation device according to claim 2.

4. The first contact wall can make surface contact with the first restricting portion. The oral irrigation device according to claim 2 or claim 3.

5. The second contact wall can make surface contact with the second restricting portion. The oral irrigation device according to any one of claims 2 to 4.

6. A rotating part having a pivot shaft connected to the nozzle and capable of rotating the nozzle, A control unit that controls the rotation of the aforementioned rotating part, Furthermore, The oral irrigation device according to any one of claims 1 to 5.

7. An imaging sensor is provided at the tip of the nozzle. The control unit controls the rotation of the nozzle by the rotating part based on the image captured by the imaging sensor. The oral irrigation device according to claim 6.

8. The nozzle has a flow path through which liquid passes and an image sensor path through which wiring connected to the image sensor is arranged. The rotating part rotates the nozzle together with the imaging sensor path and the flow path. The oral irrigation device according to claim 7.

9. The aforementioned rotating part is a stepping motor. The oral irrigation device according to any one of claims 6 to 8.

Images