Nozzle for oral irrigation device and oral irrigation device

Abstract

To provide a nozzle for an oral cavity cleaning device and an oral cavity cleaning device capable of cleaning the oral cavity more efficiently.SOLUTION: A nozzle 30 for an oral cavity cleaning device includes: a nozzle body 31 having a tip part 312; a discharge port 321 formed on a tip face 3121 of the tip part 312; and an imaging sensor 80 provided at a portion where the discharge port 321 is not formed on the tip face 3121. The nozzle 30 for an oral cavity cleaning device includes a protruding part 3122 provided so as to protrude more forward than the tip face 3121, at the tip part 312.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present disclosure relates to a nozzle for an oral cleaning device and an oral cleaning device.

Background Art

[0002] As a nozzle for an oral cleaning device, one including a nozzle body having a tip end portion is known as disclosed in the following Patent Document 1. In this Patent Document 1, a discharge port capable of discharging liquid and an imaging sensor capable of capturing an image of the inside of an oral cavity are provided at the tip end portion of the nozzle body. By this configuration, it is possible to discharge the liquid from the discharge port into the oral cavity while capturing an image of the inside of the oral cavity with the imaging sensor, thereby enabling efficient cleaning of the oral cavity.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] However, with the above-described conventional technology, it is difficult to maintain a constant distance from the imaging sensor to an imaging target in the oral cavity, and there are cases where the inside of the oral cavity cannot be clearly imaged. As described above, when the inside of the oral cavity cannot be clearly imaged, it becomes difficult to grasp the state of dirt in the oral cavity, which causes a problem that the inside of the oral cavity cannot be cleaned efficiently.

[0005] In view of the above, an object of the present disclosure is to obtain a nozzle for an oral cleaning device and an oral cleaning device that can clean the inside of an oral cavity more efficiently.

Means for Solving the Problem

[0006] A nozzle for an oral irrigation device according to one aspect of the present disclosure comprises a nozzle body having a tip, a discharge port formed on the tip surface of the tip, an imaging sensor provided on a portion of the tip surface where the discharge port is not formed, and a protrusion provided on the tip so as to protrude forward from the tip surface.

[0007] An oral irrigation device according to one aspect of the present disclosure comprises the above-described nozzle for the oral irrigation device and a gripping portion to which the nozzle for the oral irrigation device is attached. [Effects of the Invention]

[0008] According to this disclosure, it is possible to obtain a nozzle for an oral irrigation device and an oral irrigation device that can clean the inside of the mouth more efficiently. [Brief explanation of the drawing]

[0009] [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] This is a perspective view showing the inside of the gripping portion according to the embodiment. [Figure 7] This diagram illustrates a method for restricting the rotation of a nozzle using first and second restricting parts and first and second contact walls according to an embodiment, and is a cross-sectional view showing a state in which 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] This diagram illustrates a method for restricting the rotation of a nozzle using first and second restricting parts and first and second contact walls according to an embodiment, and is a cross-sectional view showing the state in which the first restricting part and the first contact wall are in contact. [Figure 9] This diagram illustrates a method for restricting the rotation of a nozzle using first and second restricting parts and first and second contact walls according to an embodiment, and is a cross-sectional view showing the second restricting part and the second contact wall in contact. [Figure 10] This is a magnified perspective view showing an example of the tip of a nozzle according to the embodiment. [Figure 11] This is a cross-sectional view showing the usage state of a nozzle as an example. [Figure 12] This is a cross-sectional view showing the usage state of the nozzle, as a modified example. [Figure 13] This is a magnified perspective view showing a modified section of the nozzle tip. [Figure 14] This is a perspective view showing a modified oral irrigation device. [Modes for carrying out the invention]

[0010] The embodiments will be described in detail below with reference to the drawings. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted.

[0011] The attached drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claims.

[0012] Furthermore, in the following embodiments, the vertical direction of the oral irrigation device is defined and described with the nozzle tip facing upwards and the stem's extension direction aligned with the vertical direction. Also, the direction in which liquid is discharged from the discharge section is defined as the front.

[0013] (Embodiment) In the following, a nozzle for an oral cleaning device and an oral cleaning device according to an embodiment will be described.

[0014] As shown in FIGS. 1 and 2, the oral cleaning device 1 according to the present embodiment includes: a device main body 10 having a case 11; a grip portion (gripping portion) 20 that can be manually held by a user or the like; and a nozzle (nozzle for an oral cleaning device) 30 attached to the grip portion 20. This oral cleaning device 1 is a device that cleans the inside of the oral cavity by discharging (ejecting) a liquid such as water from a discharge port 321, which will be described later, of the nozzle 30, and applying the liquid flow to teeth 90 or the like in the oral cavity.

[0015] Here, in the present embodiment, the nozzle 30 includes a nozzle main body 31, and the nozzle main body 31 includes: a vertically elongated stem portion 311; and a distal end portion 312 continuously provided at an upper end of the stem portion 311 so as to extend in a direction intersecting the extending direction of the stem portion 311. As described above, in the present embodiment, the nozzle 30 has a shape with a bent distal end.

[0016] And, in the present embodiment, as shown in FIGS. 3 to 5, the nozzle 30 having a shape with a bent distal end is rotatably attached to the grip portion 20.

[0017] The grip portion 20 and the nozzle 30 are connected to the case 11 of the device main body 10 via a hose 13 as shown in FIG. 1.

[0018] The device main body 10 includes the above-described case 11 and a liquid storage tank (liquid storage portion) 12 capable of storing liquid, and has a substantially rectangular parallelepiped shape. The case 11 and the liquid storage tank 12 can be formed using a material such as synthetic resin, but are not limited thereto and can be formed using various materials.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Furthermore, in this embodiment, the grip portion 20 is equipped with an operating switch 20a, part of which is exposed on the surface side, allowing the user to switch the liquid spray on or off by operating the operating switch 20a while holding the grip portion 20.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Therefore, in this embodiment, the usability of the oral irrigation device 1 can be further improved.

[0036] 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).

[0037] 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.

[0038] 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.

[0039] 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).

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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).

[0044] 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.

[0045] 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.

[0046] This ensures that the nozzle 30 is attached to the grip portion 20 in a manner that allows rotation only within a predetermined range.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Therefore, in this embodiment, the imaging sensor 80 is used to capture clearer images of the objects to be cleaned inside the oral cavity.

[0068] 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.

[0069] In this embodiment, the projection 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 projection 3122, cutting out up to the tip surface 3121. Thus, in this embodiment, the projection 3122 is provided to surround the image sensor 80. The projection 3122 has a shape in which a part is cut out. In this case, the projection 3122 is cut out in the vicinity of the image sensor 80. Specifically, the projection 3122 is formed to surround both the discharge port 321 and the image sensor 80, which are arranged side by side vertically. The notch 3123 is formed on the lower side where the image sensor 80 is located, rather than on the upper side where the discharge port 321 is located. As described above, in this embodiment, the protrusion 3122 is formed to surround both the discharge port 321 and the image sensor 80, and the shape of the protrusion 3122 is such that the side closer to the image sensor 80 than the discharge port 321 (the part where the distance from the image sensor 80 is shorter than the distance from the discharge port 321) is cut out.

[0070] This design ensures that the contact area between the protrusion 3122 and the tooth surface (object to be cleaned) 91 forms a two-dimensional line (a curved line or bend), thereby preventing the nozzle (mouthwash nozzle) 30 from wobbling when the mouthwash device 1 is in use (when the tip of the protrusion 3122 is pressed against the object to be cleaned). Furthermore, it prevents liquid from accumulating on the lens of the imaging sensor 80.

[0071] Furthermore, in this embodiment, as described above, the protrusion 3122 is provided along the edge 3121a of the tip surface 3121.

[0072] 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).

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] Furthermore, the liquid is discharged from the discharge port 321 toward the normal vector L1 of the image sensor 80. In this case, it is preferable to discharge (eject) the liquid from the discharge port 321 so as to intersect with the normal vector L1 of the image sensor 80, as shown by the dashed line in Figure 11. In this embodiment, a first through-hole (flow channel) 32 is formed in the nozzle body 31 so that the liquid is discharged (ejected) from the discharge port 321 toward the normal vector L1 of the image sensor 80.

[0079] Specifically, as shown in Figure 11, the first through-hole 32 formed in the tip portion 312 of the nozzle 30 is inclined so that it approaches the image sensor 80 as it moves toward the discharge port 321. That is, in the state shown in Figure 11 (where the first through-hole 32 is positioned above the horizontally extending wiring 81 and the image sensor 80, and the tip surface 3121 is a vertical plane), the first through-hole (flow channel) 32 is formed such that the tip side (discharge port 321 side) is lower than the inner side (stem portion 311 side). Furthermore, in the state shown in Figure 11, the inner surface 322 of the first through-hole (flow channel) 32 at the tip portion 312 of the nozzle 30 has an upper inner surface 3221 and a lower inner surface 3222. Furthermore, both the upper inner surface 3221 and the lower inner surface 3222 are inclined downwards as they approach the tip side (discharge port 321 side), with the upper inner surface 3221 having a larger inclination angle than the lower inner surface 3222.

[0080] Alternatively, a wall portion that protrudes diagonally downward from the upper edge of the discharge port 321 may be provided so that the liquid is discharged from the discharge port 321 toward the normal vector L1 of the imaging sensor 80.

[0081] Furthermore, by discharging (squirting) the liquid from the discharge port 321 toward the normal L1 of the image sensor 80, the liquid can be discharged (squirted) 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 makes it possible to align the area imaged by the imaging sensor 80 with the area from which the liquid is discharged. In other words, the area from which the liquid is discharged can be imaged 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. The protrusion 3122 shown in Figure 13 is also provided to surround the image sensor 80 and has a partially cut-out shape.

[0089] Here, the protruding portion 3122 shown in Figure 13 has a shape with two (or more) notches. 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 area near the image sensor 80 is cut out. Specifically, the protruding portion 3122 shown in Figure 13 is formed to surround both the discharge port 321 and the image sensor 80, which are arranged side by side vertically. The cutout portion 3123 is formed on the upper side where the discharge port 321 is located and on the lower side where the image sensor 80 is located.

[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 shows an example of a protrusion 3122 with two cutouts, it is also possible to have a protrusion 3122 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 nozzle for the oral irrigation device and the oral irrigation device shown in the above embodiment and its modifications, as well as the effects obtained thereby.

[0108] The nozzle (mouthwash nozzle) 30 shown in the above embodiment and its modified form comprises a nozzle body 31 having a tip portion 312, and a discharge port 321 formed on the tip surface 3121 of the tip portion 312. The nozzle (mouthwash nozzle) 30 also includes an imaging sensor 80 provided in the portion of the tip surface 3121 where the discharge port 321 is not formed. Furthermore, the nozzle (mouthwash nozzle) 30 includes a protrusion 3122 on the tip portion 312 that protrudes forward from the tip surface 3121.

[0109] Furthermore, the oral irrigation device 1 shown in the above embodiment and its modified form comprises the above-mentioned nozzle (mouth irrigation device nozzle) 30 and a grip portion (handling portion) 20 to which the nozzle (mouth irrigation device nozzle) 30 is attached.

[0110] In this way, by providing a protrusion 3122 at the tip 312 of the nozzle (mouthwashing device nozzle) 30, it is possible to prevent 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, it becomes possible to secure a predetermined distance between the imaging sensor 80 and the tooth surface (object to be cleaned) 91.

[0111] Therefore, it becomes possible to suppress the capture of blurry images due to the imaging sensor 80 getting too close to the object being imaged in the oral cavity. As a result, it becomes possible to capture a clearer image of the tooth surface (object to be cleaned) 91, allowing for more reliable confirmation of the dirt to be removed attached to the object to be cleaned using the captured image, and enabling more efficient cleaning of the oral cavity.

[0112] Thus, according to the above embodiment and its modifications, a nozzle (nozzle for oral irrigation device) 30 and an oral irrigation device 1 that can clean the inside of the mouth more efficiently can be obtained.

[0113] Furthermore, a protrusion 3122 is provided so as to surround the imaging sensor 80, and the protrusion 3122 may have a shape in which a part of it is cut out.

[0114] In this way, by providing the protrusion 3122 so as to surround the imaging sensor 80, the contact area between the protrusion 3122 and the tooth surface (object to be cleaned) 91 can be made into a two-dimensional line (a curved line or a bent line). As a result, it becomes possible to suppress the wobbling of the nozzle (mouth irrigation device nozzle) 30 when using the oral irrigation device 1 (when the tip of the protrusion 3122 is pressed against the object to be cleaned). Furthermore, by making the shape of the protrusion 3122 such that a part of it is cut out, it becomes possible to suppress the accumulation of liquid on the lens of the imaging sensor 80, thereby preventing the imaging of the object to be imaged from being obstructed by the liquid accumulated on the lens. In other words, it becomes possible to suppress the blurring of the image of the tooth surface (object to be cleaned) 91 captured by the imaging sensor 80 due to the liquid accumulated on the lens. As a result, oral cleaning can be performed more efficiently.

[0115] Furthermore, the protruding portion 3122 may have a shape in which multiple notches are cut out.

[0116] This allows the liquid on the lens of the imaging sensor 80 to be discharged from various directions. Therefore, even when the nozzle (mouthwash nozzle) 30 is used in various positions, it becomes possible to suppress the accumulation of liquid on the lens of the imaging sensor 80. As a result, oral cavity cleaning can be performed more efficiently.

[0117] Furthermore, the protruding portion 3122 may have a shape in which the area near the imaging sensor 80 is cut out.

[0118] This allows the liquid on the lens of the image sensor 80 to be discharged from the lens more quickly and reliably, thus enabling more reliable and efficient cleaning of the oral cavity.

[0119] Alternatively, the protruding portion 3122 may be provided along the edge 3121a of the tip surface 3121.

[0120] This allows the protruding portion 3122 to 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 ensuring that the protruding portion 3122 does not extend beyond the edge 3121a of the tip surface 3121, it is possible to suppress the enlargement of the tip portion 312, which is the part inserted into the oral cavity, and minimize any discomfort that may occur when using the oral irrigation device 1 (when the tip portion 312 is inserted into the oral cavity).

[0121] Furthermore, by increasing the contact area between the protrusion 3122 and the tooth surface (object to be cleaned) 91, it becomes possible to more reliably bring the protrusion 3122 into surface contact with the tooth surface (object to be cleaned) 91. And by bringing the protrusion 3122 into surface contact with the tooth surface (object to be cleaned) 91, it becomes possible to suppress the wobbling of the nozzle (mouth irrigation device nozzle) 30 when using the mouth irrigation device 1 (when the tip of the protrusion 3122 is pressed against the object to be cleaned). As a result, when using the mouth irrigation device 1, it becomes easier to maintain the state in which the tip of the protrusion 3122 is pressed against the tooth surface (object to be cleaned) 91, and it becomes possible to suppress blurring when imaging the tooth surface (object to be cleaned) 91 with the imaging sensor 80. As a result, the tooth surface 91, which is the object to be cleaned, can be imaged more clearly.

[0122] Furthermore, since the tip of the protruding portion 3122 can be more easily maintained in contact with the tooth surface (object to be cleaned) 91, the nozzle (nozzle for oral irrigation device) 30 can be used in a more stable state.

[0123] Alternatively, the protrusion distance D1 of the protruding portion 3122 from the tip surface 3121 may be made the same as the distance from the tip surface 3121 to the focal point D of the imaging sensor 80.

[0124] 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 it. As a result, the tooth surface 91, which is the object to be cleaned, can be imaged more clearly.

[0125] Alternatively, the liquid may be discharged from the discharge port 321 toward the normal vector L1 of the imaging sensor 80.

[0126] This makes it possible to dispense liquid near the area captured by the imaging sensor 80. As a result, oral cavity cleaning can be performed more efficiently.

[0127] Alternatively, the projection distance D1 of the projection 3122 from the tip surface 3121 may 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.

[0128] This makes it possible to match the area imaged by the imaging sensor 80 with the area from which the liquid is dispensed. In other words, it becomes possible to image the area from which the liquid is dispensed with the imaging sensor 80. As a result, oral cavity cleaning can be performed more efficiently.

[0129] [others] The contents of the nozzle for the oral irrigation device and the oral irrigation device described herein have been explained above. The embodiments and their modifications described above are for illustrative purposes only. Therefore, various changes, substitutions, additions, omissions, etc., can be made within the scope of the claims or their equivalents.

[0130] For example, it is possible to create a nozzle for an oral irrigation device or 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 is 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, in the above embodiment and its modified examples, the shape of the protrusion 3122 surrounding the image sensor 80 is shown to be partially cut out. However, it is also possible to have a protrusion 3122 that continuously surrounds the entire circumference of the image sensor 80.

[0138] Furthermore, it is also possible to create an oral irrigation device in which the nozzle 30 is attached to the grip portion (holding portion) 20 in a state where its rotation is restricted.

[0139] Furthermore, the tip surface 3121 may be provided with multiple discharge ports 321 and multiple imaging sensors 80.

[0140] Furthermore, it is also possible to configure the nozzle 30 to be attached to the grip portion (handling portion) 20 in a way that prevents it from rotating.

[0141] Furthermore, the tip surface 3121 may be provided with multiple discharge ports 321 and multiple imaging sensors 80.

[0142] Furthermore, it is also possible to provide an oral irrigation device in which an imaging sensor 80 is provided on the nozzle 30, and the nozzle 30 is rotated manually. Alternatively, it is also possible to provide an oral irrigation device in which an imaging sensor 80 is provided on the nozzle 30, and the nozzle 30 is attached to the grip part (holding part) 20 in a state where it cannot be rotated. In this case, after the user confirms the image captured by the imaging sensor 80, the user operates the nozzle 30 (rotates or moves it) so that the liquid is dispensed (sprayed) onto the area to be cleaned.

[0143] Furthermore, the specifications of the nozzle body, gripping part, and other details (shape, size, layout, etc.) can be changed as needed. [Industrial applicability]

[0144] As described above, the nozzle for oral irrigation devices and oral irrigation devices described herein enable more efficient cleaning of the oral cavity, and can therefore be used in various types of oral irrigation devices, including those for home and commercial use. [Explanation of Symbols]

[0145] 1. Oral irrigation device 20. Grip section (handling section) 30 nozzles (nozzles for oral irrigation devices) 31 Nozzle body 312 Tip 3121 Tip surface 3121a Edge 3122 Protrusion 3123 Notch 321 Discharge port 80 imaging sensors D focus D1 protrusion distance L1 Normal vector of the imaging sensor L2 is a straight line extending in the discharge direction. P intersection

Claims

1. A nozzle body having a tip, The discharge port formed on the tip surface of the tip portion, An imaging sensor is provided in the portion of the tip surface where the discharge port is not formed, The tip portion is provided with a projection that protrudes forward from the tip surface, Equipped with, The distance of the protrusion from the tip surface of the protrusion is the same as the distance from the tip surface to the focal point of the imaging sensor. Nozzle for oral irrigation devices.

2. A liquid is discharged from the discharge port toward the normal to the imaging sensor. A nozzle for an oral irrigation device according to claim 1.

3. The distance of the protrusion from the tip surface of the protrusion is the same as the distance from the tip surface to the intersection of the straight line extending in the direction of liquid discharge from the tip surface and the normal of the imaging sensor. A nozzle for an oral irrigation device according to claim 2.

4. A nozzle body having a tip, The discharge port formed on the tip surface of the tip portion, An imaging sensor is provided in the portion of the tip surface where the discharge port is not formed, The tip portion is provided with a projection that protrudes forward from the tip surface, Equipped with, A liquid is discharged from the discharge port toward the normal to the imaging sensor. The distance of the protrusion from the tip surface of the protrusion is the same as the distance from the tip surface to the intersection of the straight line extending in the direction of liquid discharge from the tip surface and the normal of the imaging sensor. Nozzle for oral irrigation devices.

5. The protrusion is provided so as to surround the imaging sensor. The aforementioned protruding portion has a shape in which a part of it is cut out. A nozzle for an oral irrigation device according to any one of claims 1 to 4.

6. The aforementioned protruding portion has a shape in which multiple notches are cut out. A nozzle for an oral irrigation device according to claim 5.

7. The aforementioned protruding portion has a shape in which the area near the imaging sensor is cut out. A nozzle for an oral irrigation device according to claim 5 or claim 6.

8. The aforementioned protrusion is provided along the edge of the tip surface. A nozzle for an oral irrigation device according to any one of claims 1 to 7.

9. A nozzle for an oral irrigation device according to any one of claims 1 to 8, A gripping portion to which the nozzle for the oral irrigation device is attached, Equipped with, Oral irrigation device.

Images