KR102712814B1 - Ultrasonics Denture Clear - Google Patents

Abstract

The present invention relates to a simple denture ultrasonic cleaner, which is manufactured to perform a cleaning and disinfection process for dentures, etc., installed in the oral cavity, through a simple and hygienic process. The present invention relates to a simple denture ultrasonic cleaner, which is manufactured to enable the elderly to use the device without inconvenience due to simple operation, and to ensure user convenience by easily discharging foreign substances and cleaning water generated after denture cleaning, while shortening the cleaning time by applying non-periodic (chaos principle) modified ultrasound.

Description

{Ultrasonics Denture Clear}

The present invention relates to a simple ultrasonic denture cleaner, which is manufactured to perform a cleaning and disinfection process for dentures, etc., installed in the oral cavity, through a simple and hygienic process. The present invention relates to a simple denture ultrasonic cleaner, which is manufactured to enable the elderly to use the device without inconvenience due to simple operation, and to ensure user convenience by easily discharging foreign substances and cleaning water generated after denture cleaning, while shortening the cleaning time by applying non-periodic (chaos principle) modified ultrasound.

In general, dental prosthodontics is a field of specialized dental treatment that restores and maintains the function of teeth when teeth and surrounding tissues are lost due to dental caries, periodontal disease, or accidents. In other words, it refers to making and inserting teeth when teeth are missing, and can be divided into complete dentures and partial dentures. 'Complete dentures' are dentures that restore teeth and absorbed gums when there are no teeth at all, and are a prosthesis that is maintained by negative pressure generated by being in close contact with the gums, and 'partial dentures' are dentures that restore the part where there are few teeth remaining, and are a prosthesis that is easier to use and has better retention than complete dentures because they are attached to the remaining teeth or have retention strength by using attachments or double tubes.

According to a recent survey, more than 7 out of 10 denture users over 60 years old in Seoul and the five major metropolitan cities used incorrect denture cleaning methods. For example, 44.2% chose toothpaste as the method of cleaning dentures, and 24.8% only rinsed them under running water.

Dentures are made of a weak resin material, so brushing them with toothpaste can cause scratches on the surface of the dentures due to the abrasive ingredients, which can wear out the dentures and shorten their lifespan. In addition, scratches on the dentures can cause bacterial infections, and the grooves in the dentures can allow bacteria and fungi to grow, causing oral health problems such as stomatitis, gingivitis, and bad breath.

It is reported that about two-thirds of the elderly who use dentures suffer from denture stomatitis. In particular, old dentures should be disinfected regularly for hygiene reasons because invisible bacteria can multiply and produce bad odors. However, the most effective disinfection method is boiling water disinfection, but this causes problems such as the gums and dentures becoming misaligned as the dentures become deformed. In addition, there is a method of mixing a disinfectant in water to create bubbles and soaking it for a certain period of time, but it is cumbersome, and there are problems such as the difficulty in completely removing the disinfectant, and the difficulty in purchasing the disinfectant smoothly.

To improve the above problems, various technologies have been developed to clean and disinfect dentures. However, since a single ultrasonic wave is used, the cleaning time is long, and since cleaning is not performed individually, there are problems in terms of hygiene.

Therefore, there is a need to develop a denture cleaner that is easy to use for the elderly due to its easy discharge of cleaning water after denture cleaning and simple operation, while also having additional functions such as cleaning and sterilization.

1. Korean Patent Publication No. 10-1652474 ‘Multiple Denture Sterilization and Cleaning Device’ (Application Date 2016.06.22) 2. Utility Model Registration No. 20-0265198 ‘Automatic Ultrasonic Cleaning and Ultraviolet Sterilization Storage Device for Dentures, etc.’ (Application Date: October 27, 2011) 3. Patent Publication No. 10-1893971 ‘Ultrasonic cleaner for dentures’ (Application date 2017.03.31)

The present invention has been made to solve the above problems, and the purpose of the present invention is to provide a simple denture ultrasonic cleaner that improves cleaning efficiency by using different frequency waves, allows the elderly to easily operate the cleaner so that cleaning dentures does not become a hassle, and can also clean foreign substances and sterilize bacteria.

The ultrasonic simple denture cleaner of the present invention comprises: a main body (100) having an internal receiving space (S), open upper and lower sides, and provided with a handle (110) on the side; a main cover (200) rotatably fastened to one side of the main body (100) to open and close the open upper side of the main body (100); an opening and closing means (300) installed on the handle (110) and connected to the main cover (200) to open and close the main cover (200) by a user's operation; a mesh-shaped inner case (400) located inside the receiving space (S) and having an open upper side to allow dentures to be inserted; a lower cover (500) inserted from the lower end of the main body (100) to seal the open lower side of the main body (100); It includes an ultrasonic generator (600) installed inside the lower cover (500) and receiving power from the outside to generate ultrasonic waves, wherein the ultrasonic waves are generated alternately at high and low frequencies.

And, the handle (110) includes a handle body (111) extending from the main body (100); an auxiliary handle body (112) whose lower end is mounted on the upper end of the handle body (111), whose upper end is detachably attached to the main body (100) and in which the opening/closing means (300) is rotatably coupled; a handle cover (113) fastened to cover one surface of the handle body (111) and the auxiliary handle body (112); and a rotation limiting protrusion (113-1) is further provided on one side of the handle cover (113) to limit an upward rotation angle of the main cover (200) by coming into contact with the upper surface of the main cover (200) when the main cover (200) rotates to open the upper end of the main body (100).

In the present invention, the opening/closing means (300) is characterized by including a connecting bracket (310) mounted on one side of the main cover (200); a pressurizing button part (320) installed on the handle (110) to rotate the connecting bracket (310) to control the opening/closing of the main cover (200); and a rotating spring (330) that elastically supports the connecting bracket (310) so that the main cover (200) can be opened/closed.

At this time, a rotation shaft (311) is formed protrudingly on both sides of the connecting bracket (310), a button rotation shaft (321) is formed protrudingly on both sides of the press button portion (320), the opening/closing means (300) is provided on the upper end of the handle (110), and a bracket fixing member (340) into which the rotation shaft (311) of the connecting bracket (310) is inserted; a button fixing member (350) into which the button rotation shaft (321) of the press button portion (320) is inserted and which supports the press button portion (320) to rotate; a first spring support member (360) formed on one side of the bracket fixing member (340) and supporting one side of the rotation spring (330); It is characterized by further including a second spring support member (370) including upper and lower springs (371) provided on the handle (110) and elastically supporting the pressurizing button part (320).

Meanwhile, on one side of the connecting bracket (310) of the present invention, a friction protrusion (312) having an inclined bottom is formed, and on the press button portion (320), a support protrusion (322) facing the friction protrusion (312) is formed so as to protrude, and the support protrusion (322) presses the bottom of the friction protrusion (312) by the elastic force of the upper and lower springs (371), so that the main cover (200) seals the top of the main body (100), and when the top of the press button portion (320) is pressed, the support protrusion (322) slides away from the friction protrusion (312), so that the main cover (200) opens the top of the main body (100) by the elastic force of the rotary spring (330).

In the present invention, the main cover (200) is provided with a cover insertion hole (210) formed through the upper and lower direction, and an auxiliary cover (220) for opening and closing the cover insertion hole (210) is further provided, and a fastening projection (221) is formed at a predetermined interval along the edge at the lower end of the auxiliary cover (220), and an insertion groove (211) into which the fastening projection (221) is inserted is formed on the inner surface of the cover insertion hole (210), and a settling groove (212) is formed at a predetermined interval along the edge of the inner surface, and the auxiliary cover (220) is rotated to one side to set the fastening projection (221) in the settling groove (212) so as to prevent the auxiliary cover (220) inserted into the cover insertion hole (210) from being pulled out.

One side of the main body (100) is inserted inwardly, and an insertion groove (101) is formed on the inner surface of the inserted main body (100), and a separation-prevention projection (112-1) is formed protruding on the upper end of the auxiliary handle main body (112), and the auxiliary handle (112) is prevented from being separated when the separation-prevention projection (112-1) is inserted into the insertion groove (101).

The present invention improves the efficiency of denture cleaning by using non-periodic ultrasonic waves to shorten the cleaning time of dentures, and provides a handle part on one side of the main body so that the main cover covering the main body can be opened and closed with one touch, so that the elderly and the aged can use it conveniently.

In addition, the present invention has an advantage in that a discharge port is formed on the outside of the main body so that the washing water that has been washed can be discharged, and a discharge control rib is further provided on the main cover to open only a part of the discharge port so that only a certain amount of washing water can be discharged when discharging contaminated washing water.

Figure 1 is a perspective view showing the overall appearance of the present invention.
Figure 2 is an exploded perspective view showing the main configuration of the present invention.
Figure 3 is an exploded cross-sectional view showing the main configuration of the present invention.
Figure 4 is an exploded perspective view showing the main components of the opening/closing means of the present invention.
Fig. 5 is a partial cross-sectional view showing an example of the operation of the opening/closing means of the present invention.

Hereinafter, an embodiment of a simple ultrasonic cleaning device for dentures of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, the ultrasonic cleaner for dentures of the present invention has a main body (100) in which a receiving space (S) for receiving cleaning water for cleaning dentures is formed inside. The main body (100) is preferably formed in a cylindrical shape and has an open shape at the top and bottom. In addition, a handle (110) may be further provided on the side of the main body (100) so that a user can easily hold the main body (100).

A main cover (200) is further provided on the open upper side of the main body (100). One side of the main cover (200) is connected to one side of the main body (100) so as to be rotatable in the upper and lower directions, and as a result, the main cover (200) can open the upper and lower sides of the main body (100) while rotating in the upper and lower directions.

Referring to FIGS. 1 and 2, an opening/closing means (300) for opening/closing the main cover (200) is installed on the handle (110). The opening/closing means (300) can open/close the main cover (200) by the user's operation, and is installed on the handle (110) with one side connected to the main cover (200).

In addition, an inner case (400) is further provided in the receiving space (S) of the main body (100). The inner case (400) is formed in a shape in which the upper end is open so that the retainer can be inserted, and is manufactured in a mesh shape through which the retainer can be supplied so that the retainer can come into contact with the retainer. The inner case (400) is supported by being secured to a protruding hook on the inner surface of the main body (100).

Referring to FIGS. 2 and 3, a lower cover (500) is further provided to be inserted into the lower part of the main body (100) to seal the open lower part of the main body (100). The lower cover (500) can be detachably attached to the lower part of the main body (100) to perform easy management and cleaning of the main body (100). That is, a fastening groove (100-1) spaced apart at a certain interval along the inner surface is formed on the lower edge of the main body (100), and a fastening projection (500-1) to be inserted into the fastening groove (100-1) is protrudingly formed on the outer edge of the lower cover (500). Therefore, the lower cover (500) can be detached from the main body (100) by a user's manipulation.

Referring to FIGS. 2 and 3, an ultrasonic generator (600) may be provided inside the lower cover (500). The ultrasonic generator (600) receives power from the outside and generates ultrasonic waves. The vibration of sound waves generated from the ultrasonic generator (600) alternates between high and low frequencies. By providing aperiodic changes to the amplitude of sound waves in this way, foreign substances attached to the surface of dentures can be removed more effectively, and the cleaning time can be shortened, providing an advantage. The vibration amplitude of sound waves generated from the ultrasonic generator (600) is aperiodically changed in a vibration amplitude range of 18 kHz to 42 kHz.

Meanwhile, a vibration amplifying plate (510) that receives ultrasonic vibration from an ultrasonic generator (600) may be further provided on the upper surface of the lower cover (500). The vibration amplifying plate (510) transmits ultrasonic vibration to the washing water contained in the main body (100) and amplifies the transmitted vibration. That is, the vibration amplifying plate (510) may be formed with a predetermined thickness and may have a curved cross-section so as to evenly transmit vibration to the entire surface of the receiving space of the main body (100).

The vibration amplifying plate (510) can maintain a state of close contact with the inner surface of the main body (100), and a sealing ring (520) is further provided on the edge of the vibration amplifying plate (510) to prevent washing water from leaking to the lower part of the main body (100).

Referring to FIG. 2, the handle (110) includes a handle body (111) extending from the main body (100), an auxiliary handle body (112) whose lower end is mounted on the upper end of the handle body (111), whose upper end is detachably attached to the main body (100) and in which an opening/closing means (300) is rotatably coupled, and a handle cover (113) fastened to cover an exposed surface of the handle body (111) and the auxiliary handle body (112). As a result, if a part of the auxiliary handle body (112) is damaged due to frequent operation of the opening/closing means (300), an advantage is created in that only the corresponding part can be replaced.

At this time, a rotation limiting protrusion (112-1) is formed protrudingly on one side of the handle cover (112). The rotation limiting protrusion (112-1) comes into contact with the upper surface of the main cover (200) and supports the main cover (200) when the main cover (200) rotates to open the upper part of the main body (100). That is, when the main cover (200) is perpendicular to the ground by the rotation spring (330), the upper surface of the main cover (200) is supported by the rotation limiting protrusion (112-1) to limit the upward rotation angle of the main cover (200) (to prevent the main cover (200) from rotating any further).

Referring to FIGS. 2 and 3, the opening/closing means (300) includes a connecting bracket (310), a pressure button portion (320), and a rotary spring (330). The connecting bracket (310) can be mounted on one side of the main cover (200). A rotary shaft (311) is formed protrudingly on each of both sides of the connecting bracket (310). It is preferable that the connecting bracket (310) be made of a material having higher rigidity than the material of the main cover (200).

The pressure button part (320) is installed on the handle (110), and the opening and closing of the main cover (200) is controlled by rotating the connection bracket (310) by operating the pressure button part (320). A button rotation shaft (321) is formed protrudingly on both sides of the pressure button part (320).

The rotary spring (330) elastically supports the connecting bracket (310) so that the main cover (200) can rotate upward to open the main body (100). That is, the elastic force of the rotary spring (330) acts in the direction of opening the main cover (200), and when the pressure button portion (320) maintains contact with the connecting bracket (310), the main cover (200) covers the upper surface of the main body (100), and when the contact state between the pressure button portion (320) and the connecting bracket (310) is released, the elastic force of the rotary spring (330) can rotate the main cover (200) upward to open the upper surface of the main body (100).

Referring to FIGS. 2 to 4, the opening/closing means (300) further includes a bracket fixing member (340), a button fixing member (350), a first spring support member (360), and a second spring support member (370).

The bracket fixing member (340) is formed to protrude upwardly at the top of the handle (110), and the bracket fixing member (340) is provided as a pair so that multiple rotation axes (311) of the connecting bracket (310) can be inserted, respectively. Accordingly, the connecting bracket (310) can rotate up and down around the rotation axes (311). The bracket fixing member (340) may further include a rotation pin (341) penetrating the connecting bracket (310), and the main cover (200) can rotate around the rotation pin (341).

The button fixing member (350) is formed on the upper side of the handle (110) adjacent to the bracket fixing member (340), and is provided as a pair spaced apart at a certain interval so that a pair of button rotation axes (321) of the pressure button part (320) can be inserted. The pressure button part (320) coupled to the button fixing member (350) can rotate up and down around the button rotation axes (321).

The first spring support (360) is provided between the bracket fixing member (340) and the button fixing member (350). The first spring support (360) supports one side of the rotation spring (330) so that the rotation spring (330) provides elastic force to rotate the main cover (200) upward.

The second spring support (370) is provided on the handle (110). The second spring support (370) includes upper and lower springs (371) that elastically support the pressure button portion (320). One side of the upper and lower springs (371) contacts the pressure button portion (320), and the other side contacts the second spring support (370), thereby elastically supporting the pressure button portion (320).

Meanwhile, referring to Fig. 4, an insertion hole (351) into which a button rotation shaft (321) is inserted is formed in the button fixing member (350), and a guide groove (352) that guides the button rotation shaft (321) to the insertion hole (351) can be formed at the top of the button fixing member (350). Due to the guide groove (352), the press button portion (320) can be easily inserted into the button fixing member (350).

The connecting bracket (310) and the pressure button portion (320) of the present invention will be described in more detail with reference to FIGS. 4 and 5.

On one side of the connecting bracket (310), a friction projection (312) with an inclined lower surface is formed protruding, and on the pressure button portion (320), a support projection (322) facing the friction projection (312) is formed protruding.

At this time, the support protrusion (322) is in contact with the friction protrusion (312) so as to maintain the lower end of the friction protrusion (312) in a pressed state. Since the upper and lower springs (371) elastically support the pressurizing button portion (320), the support protrusion (322) can press the friction protrusion (312) with a certain pressing force. As a result, the main cover (200) can cover the open upper end of the main body (100).

When a user wants to open the upper part of the main body (100) to install the denture into the inner case (400) by rotating the main cover (200) upward, the upper part of the press button part (320) is pressed to rotate the press button part (320). At the same time, the support protrusion (322) gradually slides with the inclined lower part of the friction protrusion (312), and as the main cover (200) rotates upward by the elastic force of the rotation spring (330), the friction protrusion (312) is separated from the support protrusion (322), i.e., the contact state is released. Accordingly, the main cover (200) is completely rotated upward to open the upper part of the main body (100).

Conversely, when the main cover (200) is pressed downward, the friction protrusion (312) presses the lower end of the support protrusion (322) and rotates the press button part (320). Then, when the main cover (200) completely covers the upper end of the main body (100), the friction protrusion (312) is secured to the upper end of the support protrusion (322), and while the support protrusion (322) is maintained in a state of pressing the friction protrusion (312), the main cover (200) can maintain the state of covering the upper end of the main body (100).

At this time, it is preferable that the elastic coefficient of the upper and lower springs (371) be manufactured to have an elastic coefficient that is at least equal to or greater than the elastic coefficient of the rotary spring (330).

Referring to Figure 2, the main cover (200) has a cover insertion hole (210) that penetrates in the vertical direction, and an auxiliary cover (220) that opens and closes the cover insertion hole (210) is further provided.

The auxiliary cover (220) is preferably manufactured with the same diameter as the cover insertion hole (210), and has the purpose of allowing the user to easily insert items to be washed by opening the auxiliary cover (220) when the main cover (200) is closed. A gripping portion (222) may be formed protrudingly on the upper end of the auxiliary cover (220) to prevent the user's hand from slipping, and a number of fastening protrusions (221) may be formed protrudingly at the lower end of the auxiliary cover (220) and spaced apart at regular intervals along the outer edge.

And, a plurality of insertion grooves (211) into which the fastening projections (221) can be inserted are formed on the inner surface of the cover insertion hole (210). And, a settling groove (212) is formed at a predetermined distance from the insertion grooves (211) on the inner lower edge of the cover insertion hole (210). When a user inserts the auxiliary cover (220) into the cover insertion hole (210) and then rotates it by a predetermined radius to set the fastening projections (221) in the settling grooves (212), the auxiliary cover (220) can be prevented from being forcibly pulled out of the cover insertion hole (210) by ultrasonic vibration or external force.

Referring to FIGS. 2 and 5, a discharge port (102) may be formed in the main body (100) to guide the discharge of wash water when the wash water is discharged after washing is completed. At this time, the main cover (200) is further provided with a discharge volume control rib (230) that blocks a portion of the discharge port (102) when the main cover (200) covers the upper part of the main body (100). The discharge volume control rib (230) prevents the phenomenon of contaminated wash water being suddenly discharged through the discharge port (120) when the main body (100) is tilted to discharge wash water, thereby contaminating the surroundings.

Meanwhile, a UV lamp may be additionally installed on the inside of the main cover (200) so that sterilization can be performed along with cleaning of the dentures. The ultrasonic generator (600) and the UV lamp can operate simultaneously, and each can be operated by separate operations.

In addition, a detection unit (103) for detecting whether the main cover (200) is open or closed may be further provided in the upper opening of the main body (100). The detection unit (103) may be composed of a sensor using magnets and magnetic force, and controls the operation of the ultrasonic generator (600) by detecting whether the main cover (200) is open or closed.

Referring to Fig. 2, one side of the main body (100), that is, a portion adjacent to the handle (110), is formed to be inserted in the inner direction of the main body (100), and an auxiliary handle main body (112) is secured to the inserted portion. In addition, an insertion groove (101) is formed on the inner surface portion of the inserted main body (100).

At this time, a detachment prevention projection (112-1) is formed protruding on the upper part of the auxiliary handle body (112), and when the detachment prevention projection (112-1) is inserted into the insertion groove (101), the auxiliary handle body (112) can be firmly fixed.

The ultrasonic cleaner for dentures of the present invention manufactured with such a configuration is not limited to the above description, and can be implemented by modifying it in various ways within the scope of the attached drawings.

100 : Body 110 : Handle
200 : Main cover 210 : Insertion hole
220: Auxiliary cover 300: Opening/closing means
310: Connection bracket 320: Pressurized button
330: Rotating spring 340: Bracket fixing member
350: Button fixing bracket 360: 1st spring support bracket
370 : 2nd spring support 400 : Inner case
500: Lower cover 600: Ultrasonic generator

Claims (6)

A main body (100) having an internal storage space (S), open upper and lower sides, and a handle (110) provided on the side;
A main cover (200) that is rotatably fastened to one side of the main body (100) to open and close the open upper side of the main body (100);
An opening/closing means (300) installed on the handle (110) and connected to the main cover (200) to open/close the main cover (200) by the user's operation;
A mesh-shaped inner case (400) located inside the above-mentioned receiving space (S) and having an open top for inserting a denture;
A lower cover (500) including a vibration amplifying plate (510) inserted from the lower end of the main body (100) to seal the open lower side of the main body (100), having a predetermined thickness and a curved cross-section;
An ultrasonic generator (600) is installed inside the lower cover (500) and receives power from the outside to generate ultrasonic waves, and the ultrasonic waves are generated alternately at high and low frequencies.
The above handle (110) is a handle body (111) extending from the main body (100);
An auxiliary handle body (112) in which the lower part is mounted on the upper part of the handle body (111), the upper part is detachably attached to the body (100), and the opening/closing means (300) is rotatably coupled;
It includes a handle cover (113) that is fastened to cover one side of the handle body (111) and the auxiliary handle body (112);
On one side of the handle cover (113), a rotation limiting projection (113-1) is further provided to limit the upward rotation angle of the main cover (200) by coming into contact with the upper surface of the main cover (200) when the main cover (200) rotates to open the upper end of the main body (100).
One side of the above main body (100) is inserted inwardly, and an insertion groove (101) is formed on the inner surface of the inserted main body (100).
A simple ultrasonic cleaning device for dentures, characterized in that a detachment prevention projection (112-1) is formed protrudingly on the upper part of the auxiliary handle body (112), and the auxiliary handle body (112) is prevented from detaching when the detachment prevention projection (112-1) is inserted into the insertion groove (101). In the first paragraph,
The above opening/closing means (300) is a connecting bracket (310) mounted on one side of the main cover (200);
A pressure button part (320) installed on the handle (110) to rotate the connecting bracket (310) to control the opening and closing of the main cover (200);
A rotary spring (330) that elastically supports the connecting bracket (310) so that the main cover (200) can be opened and closed;
A simple ultrasonic cleaning machine for dentures, characterized by including: In the second paragraph,
A rotation axis (311) is formed protrudingly on both sides of the above connecting bracket (310).
On both sides of the above pressurized button portion (320), a button rotation axis (321) is formed protrudingly,
The above opening/closing means (300) is provided at the upper end of the handle (110) and includes a bracket fixing member (340) into which the rotation shaft (311) of the connecting bracket (310) is inserted;
A button fixing member (350) into which the button rotation shaft (321) of the above-mentioned pressure button portion (320) is inserted to support the pressure button portion (320) so that it rotates;
A first spring support (360) formed on one side of the above bracket fixing member (340) and supporting one side of the above rotary spring (330);
A second spring support (370) including upper and lower springs (371) provided on the handle (110) and elastically supporting the pressurizing button portion (320);
A denture ultrasonic cleaning machine characterized by further including: In the third paragraph,
On one side of the above connecting bracket (310), a friction projection (312) with an inclined bottom is formed, and on the pressure button portion (320), a support projection (322) facing the friction projection (312) is formed protruding.
The above support protrusion (322) presses the lower end of the friction protrusion (312) by the elastic force of the upper and lower springs (371), so that the main cover (200) seals the upper end of the main body (100).
A simple ultrasonic cleaning device for dentures, characterized in that when the upper part of the pressurizing button part (320) is pressed, the support protrusion (322) slides away from the friction protrusion (312) and the main cover (200) opens the upper part of the main body (100) by the elastic force of the rotary spring (330). In the first paragraph,
The above main cover (200) has a cover insertion hole (210) formed through the upper and lower direction, and an auxiliary cover (220) for opening and closing the cover insertion hole (210) is further provided.
At the bottom of the above auxiliary cover (220), fastening protrusions (221) are formed at regular intervals along the edge.
On the inner surface of the cover insertion hole (210), an insertion groove (211) into which the fastening projection (221) is inserted and a settling groove (212) spaced apart from the insertion groove (211) at a certain distance along the inner surface edge are formed.
A simple ultrasonic cleaning machine for dentures, characterized in that the auxiliary cover (220) inserted into the cover insertion hole (210) is rotated to one side to prevent the auxiliary cover (220) from being pulled out, thereby seating the fastening projection (221) in the seating groove (212). delete

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