JP4084336B2 - UV disinfector for handpiece used in dentistry - Google Patents

Description

  The present invention relates to a sterilizer for disinfecting an infected handpiece that has been inserted into the oral cavity of a sick person by dentistry and contacted with dirt such as blood and saliva containing bacteria and viruses during treatment.

  In general, dental hospitals use various types of instruments such as tweezers, probes, mirrors, and handpieces to treat teeth and gums in the oral cavity. Since these instruments are easily contaminated by bacteria and viruses contained in the blood, saliva, and tissues of the sick person, the contaminated instruments should be thoroughly disinfected after use so that bacteria and viruses are not transmitted to other sick persons. It is important to make it. Tweezers, probes, mirrors, etc. are relatively inexpensive and equipped with a large number of items, and once used items can be collected separately and sterilized using disinfectant or high-temperature steam or water It is. However, in the case of a handpiece connected to a pneumatic device or a laser generator, the price is not low enough to be used by replacing it with many pieces, and a pneumatic motor or lens is installed inside and it is hot. It is difficult to sterilize because it is impossible to sterilize using steam or water.

  In order to disinfect such a handpiece, a disinfectant using ultraviolet rays as shown in FIG. 7 has been developed in the past. Such a conventional sterilizer 100 includes a casing assembly 110 in which an ultraviolet lamp 112 is mounted, and a drawer 120 that is pulled out or inserted in front of the casing assembly 110 to receive a dental instrument. In addition, an exhaust fan 130 that is installed on the side of the case 110 and circulates the internal air through a large number of ventilation holes 132 is integrally installed.

  Since the sterilizer 100 needs to open and close the drawer with a contaminated hand in order to store the handpiece in the drawer 120, the handle portion of the drawer 120 is contaminated, and the disinfected handpiece is pulled out. In addition, there is a problem that the hand is contaminated by the handle part of the drawer 120, the handpiece is handled by the contaminated hand, and the handpiece is contaminated again, and ultraviolet rays are emitted to the outside. It was.

  FIG. 8 shows another conventional disinfectant 200 that solves the disadvantages of the pull-out disinfectant. However, an ultraviolet lamp 212 is provided around a transparent tube 220 horizontally disposed inside the casing assembly 210. An inlet portion 230 is integrally formed and formed in front of the outer side of the casing assembly 210 where the transparent tube 220 is installed, and the insertion hole 232 is closed by an ultraviolet blocking film 234 cut radially. Yes.

  In the case of the sterilizer 200 with the cut UV dissipating membrane 234, when the handpiece is inserted into the disinfecting device, the UV dissipating membrane 234 is contaminated by the contaminated handpiece. There is a problem that the handpiece is also contaminated by the ultraviolet blocking film 234 which is contaminated when it is pulled out.

  The present invention is intended to solve the above-described drawbacks of the conventional disinfectant, and a main object of the present invention is to provide an ultraviolet disinfectant for handpieces that prevents the disinfectant itself from being contaminated by dirt.

  It is necessary to prevent contaminants from coming into contact with the outside of the disinfectant that is not irradiated with ultraviolet rays, although the internal region of the disinfectant that is irradiated with ultraviolet rays is always sterilized. That is, when the contaminated handpiece is drawn into the disinfectant, it is necessary not to bring the contaminated handpiece into contact with the outer part of the disinfectant that is not sterilized by ultraviolet rays.

  Another object of the present invention is to prevent the sanitary handpiece that has been sterilized from being contaminated by the disinfectant by preventing contact with the outside of the disinfector when the handpiece is pulled out after being sterilized. It is to provide a UV disinfector for use.

  It is still another object of the present invention to provide a handpiece disinfector configured to provide an aromatherapy effect together.

  It is still another object of the present invention to provide a handpiece disinfector further comprising a pile tray that can be sterilized with ultraviolet light by setting a dental pile.

  Another object of the present invention is to provide a handpiece disinfectant that prevents ultraviolet rays harmful to the human body from leaking outside the disinfectant.

  In order to achieve the above object, a sterilizer for a dental handpiece according to the present invention includes a casing assembly in which an opening is formed on the front surface for entering and exiting the handpiece, and an ultraviolet blocking film cut radially. Is a door portion that opens and closes the front opening of the casing assembly, a transparent tube that is installed inside the casing assembly so as to communicate with the door portion and on which a handpiece can be placed, and an opening in the front of the casing assembly A sensor installed on the edge, an ultraviolet lamp installed inside the casing assembly, and when the sensor confirms that the handpiece is approaching, the ultraviolet shielding film is opened, and after the handpiece has entered, the ultraviolet light is blocked. Close the membrane and turn on the UV lamp for a certain period of time, then turn it off, open the UV blocking membrane again, and after the handpiece is pulled out, remove the UV blocking membrane. A control circuit for controlling the Mel so configured including motor one motor for opening and closing the door part by a signal generated by the control circuit.

  When the handpiece is brought close to the opening of the casing assembly, a sensor installed at the edge of the opening detects the approach, and the control circuit drives the motor to open the UV blocking film of the door. When the handpiece is inserted into the sterilizer, the control circuit drives the motor to close the UV blocking film and turn on the UV lamp. The control circuit turns off the UV lamp and drives the motor in the opposite direction to open the UV blocking film after a certain period of time. When the handpiece is pulled out after the UV blocking film is opened, the handpiece is not in contact with the disinfector, so that the sterilization is completed and the clean state is maintained.

  The control circuit further has a function of calculating a speed at which the handpiece enters from a signal input from the sensor, and adjusting a speed at which the door portion opens by the approach speed of the handpiece.

  Since the dental handpiece is inserted to a deep point in the oral cavity, the diameter of the end is thin, and the portion that the user grips with the hand is thick and formed thick so that it can be easily gripped. The sensor used in the present invention, for example, an optical sensor, determines the opening / closing speed of the door part according to the intensity of light input to the light receiving part, and blocks the ultraviolet ray even if the user enters the disinfector quickly. The opening speed of the film is also increased, so that the handpiece does not come into contact with the UV blocking film.

  Alternatively, it is preferable that the control circuit further includes a function of calculating the thickness of the handpiece from the signal input from the sensor and adjusting the opening speed of the door portion according to the thickness of the handpiece.

  Another embodiment of the above-described disinfectant for a dental handpiece according to the present invention is formed with a casing assembly in which an opening for entering and exiting the handpiece is formed on the front surface, and an ultraviolet blocking film cut in a radial shape. Such an ultraviolet blocking film opens and closes the front opening of the casing assembly so that the ultraviolet blocking film is opened at the time of standby and at the end of sterilization, and the ultraviolet blocking film is closed at the time of sterilization. A transparent pipe on which the handpiece is placed and a transparent pipe installed in the casing assembly so as to communicate with the door section, and a hand installed on the periphery of the transparent pipe inside the casing assembly. A sensor that detects the entry of a piece, an ultraviolet lamp installed inside the casing assembly, and an ultraviolet ray when the sensor confirms that the handpiece has entered by the sensor. Includes a control circuit that closes the shielding film, turns off the ultraviolet lamp for a certain period of time, then turns it off, and opens the ultraviolet shielding film again, and a motor that opens and closes the door by a signal generated by the control circuit. Composed.

  The above-mentioned sterilizer for dental handpieces can enter the sterilizer without touching the ultraviolet blocking film because the ultraviolet blocking film is opened at the time of standby and at the end of sterilization. When the handpiece is placed on the transparent tube in the disinfector, a sensor installed around the transparent tube will detect this, and the control circuit will drive the motor to close the UV blocking film and close the UV lamp Lights up. After a certain time, the control circuit turns off the UV lamp and drives the motor to open the UV blocking film. Even through this operation, the dental disinfectant of the present invention ensures that the handpiece does not touch the disinfectant.

  The disinfector for handpieces of the present invention is characterized in that the transparent tube and the ultraviolet lamp are inserted and a reflection protector for preventing external leakage of ultraviolet rays is installed inside the casing assembly.

  Ultraviolet rays for achieving the purpose of sterilization are strong, and the ultraviolet rays leaking out of the disinfection device have a bad influence on the human body. Therefore, the transparent tube and the ultraviolet lamp are wrapped with the reflection protection body in order to block the ultraviolet ray leaking through the gap of the casing assembly of the handpiece in advance.

It has been reported that a minimum of 3400 μW · s / cm ² and a maximum of 22000 μW · s / cm ² are required to kill 100% of viruses and bacteria. For example, Shigella is sterilized 100% with UV energy of 3400μW · s / cm ² , influenza virus with 6600μW · s / cm ² and tetanus with 22000μW · s / cm ² . Therefore, it is effective to set the irradiation amount of ultraviolet rays inside the disinfectant to 22000 μW · s / cm ² . In the present invention, as a result of measuring at a distance of 2 cm from a 9 W UV lamp, an irradiation dose of 13000 μW · s / cm ² can be obtained. Many known bacteria and viruses can be removed.

  The handpiece disinfector of the present invention may further include a blower fan for discharging heat generated by the ultraviolet lamp on one side of the casing assembly. When the handpiece sterilizer is used continuously, the temperature inside the casing assembly rises due to the heat generated by the ultraviolet lamp, and the temperature rise inside the casing assembly is applied to the control circuit inside the casing assembly. It is desirable to keep the temperature inside the casing assembly low by venting the air inside the casing assembly to the outside to adversely affect it.

  The disinfector for handpieces of the present invention may be configured by additionally including a pile tray having a large number of pile holes that are opened and closed by a cover on one side of the casing assembly and can be sterilized by sandwiching the dental pile. it can. Such a pile tray is for allowing a tool such as a dental drill to be inserted and disinfected by ultraviolet rays.

  The disinfector for handpieces of the present invention can be constructed by additionally including a fragrance tray that is housed in a drawer type near the blower fan and that contains fragrance inside. At present, aromatherapy (aromateraphy) is known in which various therapeutic effects are seen depending on the scent. By using a fragrance that has an effect of bringing a sense of stability, a sick person who visits dentist can look for psychological stability, and it is not necessary to prepare a separate fragrance device, so an advantageous effect can be obtained.

  According to the present invention, it is possible to prevent the UV disinfection device for handpieces from being contaminated by contaminants, and the sanitary product that has been sterilized by preventing the handpiece from coming into contact with the outside of the disinfection device that is easily contaminated after sterilization It can be ensured that the handpiece is not contaminated by the disinfectant.

  The ultraviolet sterilizer for handpieces of the present invention can provide both an aromatherapy effect by preventing ultraviolet rays from leaking to the outside, and can simultaneously disinfect dental piles.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

[Example 1]
FIG. 1 is a front perspective view of a handpiece disinfector of the present invention, and FIG. 2 is an exploded perspective view of the present invention. FIG. 3 is a partial sectional view showing the coupled state of the present invention, and FIG. 4 is a rear perspective view of the present invention. The casing assembly of the handpiece disinfector 1 of the present invention is injection molded so that the upper casing 10, the lower casing 10 'and the door cover 20 can be separated and joined to each other. An opening 12 is formed in front of the lower casing 10 ′ and the door cover 20. A control circuit 70 is mounted on the upper surface of the lower casing 10 ', and an exhaust hole 13 is passed through the upper rear surface, and a power outlet and a power switch SW are provided at the lower part thereof.

  FIGS. 5 and 6 show a state in which the door portion 40 that opens and closes the opening 12 of the casing assembly is closed or opened by the ultraviolet blocking film 46 cut in a radial shape. The door portion 40 is a set of doors having a semicircular frame portion in which arc-shaped tooth portions 44 and 44 'meshing with each other are formed on one side, and the ultraviolet blocking film 46 is assembled on the other side. The frame 42, 42 'and the ultraviolet blocking film 46 which is installed in the semi-circular frame portion of the door frame 42, 42' and cut radially. Among the pair of door frames 42, 42 ', the upper stage of one door frame 42' is hinged so that it can be rotated to the upper front of the door part 40, and the upper stage of the other door frame 42 is a control circuit. Connected with Motor M driven by 70. When the motor is driven, the operation of the door frame 42 connected to the motor allows the other door frame 42 'to be simultaneously opened and closed by the tooth profile portions 44, 44' engaged with each other. .

  The UV blocking film 46 must be made of a flexible material such as silicone or rubber because the UV blocking film 46 must be lifted when the handpiece is inserted so that light does not leak out. In addition, an incision is made with radiation to such an extent that the ultraviolet blocking film 46 is lifted and light does not leak. The ultraviolet blocking film 46 can be provided at the same time on the front surface and the rear surface of the semicircular frame part to prevent leakage of ultraviolet rays more reliably.

  The handpiece disinfectant of the present invention includes a transparent tube 50 that is installed inside the casing assembly 10 so as to communicate with the door portion 40 and on which the handpiece can be placed. The tube 50 is made of any material that can withstand the heat generated by the ultraviolet lamp, and can be any transparent material that transmits UV light well.

  Although an ultraviolet lamp 60 is installed inside the casing assembly 10, in the present invention, even if two ultraviolet lamps with a capacity of 9 W are provided and sterilized for more than 1 second, most of the bacteria and viruses known so far Can be removed.

  The handpiece disinfection device of the present invention is provided at the edge of the front opening 12 of the casing assembly 10 and includes a sensor S1 that senses the entry of the handpiece. In the present invention, the light emitting unit and the light receiving unit are provided at the front opening. It is installed so as to face the edge of the light, and the light received from the light emitting part is detected by the light receiving part located at the opposed position. As the handpiece approaches, the intensity of light received by the light receiver decreases, but the control circuit 70 determines that the handpiece is approaching when the intensity of light received by the light receiver decreases, and the UV light of the door section 40 The barrier film 46 is opened. Since the handpiece is inserted deep into the oral cavity, the end diameter is narrow, and the part that the user grips with the hand is made thicker to make it easier to grip, so the intensity of the light input to the light receiving part of the sensor If the change speed is fast, the opening speed of the ultraviolet blocking film 46 is increased, and if the changing speed is slow, the opening speed of the door part of the ultraviolet blocking film 46 is decreased.

  It is also desirable that the control circuit 70 grasps a change in the intensity of light input to the light receiving unit of the sensor, calculates the thickness of the handpiece, and adjusts the opening speed of the door portion according to the thickness of the handpiece.

  If the handpiece is placed on the inner transparent tube 50, the light intensity change does not occur in the sensor section, so the control circuit 70 determines that the entry into the disinfector of the handpiece has been completed and closes the UV blocking film 46. To. If the UV blocking film 46 is completely closed, the control circuit turns on the UV lamp 60, and after a certain period of time, turns off the UV lamp 60 and rotates the monitor to open the UV blocking film 46. To.

  When the intensity of the light received by the light receiving part of the sensor is increased again, the control circuit confirms that the handpiece has been pulled out of the disinfectant and closes the ultraviolet blocking film 46.

  A separate sensor may be provided around the transparent tube 50 to ensure that the handpiece disinfector has been entered.

[Example 2]
The second embodiment of the present invention is the same as the first embodiment in the casing assembly, transparent tube, ultraviolet lamp, and monitor, but differs in the position of the sensor and the procedure for opening and closing the door unit 40 operated by the control circuit. There is.

  The door part of Example 2 is configured such that the ultraviolet blocking film cut radially is opened at the time of standby and at the end of sterilization, and is closed at the time of sterilization, and the sensor is a transparent tube inside the casing assembly. There is a difference from the first embodiment in that it is installed around and detects the entry of the handpiece. When the sensor confirms that the handpiece has entered, the UV blocking film is closed, the UV lamp is turned on for a certain period of time and then turned off. When disinfection is completed, the motor is rotated to open the UV blocking film again. The control circuit is different.

  Since the UV-blocking film of the handpiece disinfector is always open except during sterilization, the possibility of contaminating the disinfector during the handpiece entry / exit is completely removed.

  In the above-described handpiece disinfector of Example 1 and Example 2, a reflection protector 80 into which the transparent tube 50 and the ultraviolet lamp 60 are inserted is provided inside the casing assembly. It can also prevent harmful ultraviolet rays from leaking outside. The reflection protector 80 is constructed so that the inner surface of the transparent tube 50 and the ultraviolet lamp 60 wraps back well, and not only the ultraviolet rays emitted from the ultraviolet lamp 60 but also the reflected ultraviolet rays are used to cut the corners of the handpiece. It can be sterilized and the amount of UV irradiation can be increased.

  In addition, it is more desirable to provide a blower fan P on one side of the casing assembly in order to discharge the heat generated by the ultraviolet lamp in the handpiece disinfectant of the first and second embodiments.

  A drawer 90 that can store the fragrance 92 is provided near the blower fan, and a scent having an aromatherapy function is released from the disinfectant to the outside so that the sick can look for psychological stability.

  If one side of the casing assembly further includes a pile tray 30 that is opened and closed by a cover 16 and has a large number of pile holes 15 that can be sterilized by sandwiching the dental pile, the dental pile also emits ultraviolet rays. Easy to sterilize using.

It is a front perspective view of the present invention. It is an exploded perspective view of the present invention. FIG. It is a rear perspective view of the invention. It is a front view which shows the state in which the door was closed. It is a front view which shows the state by which the door was opened. It is a conventional UV disinfector. It is a traditional and other disinfectant.

Explanation of symbols

10 Upper casing
10 'lower casing
12 opening
13 Exhaust hole
15 Pile hole
16 Cover
20 Door cover
30 Pile tray
40 Door
42,42 'semicircular frame
44,44 'tooth profile
46 UV blocking film
50 Transparent tube
60 UV lamp
70 Control circuit
80 Reflective protector
90 drawer
92 Air freshener
M monitor
SW Power switch
S1 sensor

Claims (7)

A casing assembly in which an opening is formed on the front surface for entering and exiting the handpiece;
A radiation-cut UV blocking film that opens and closes the front opening of the casing assembly; and
A transparent tube that is installed inside the casing assembly so as to communicate with the door portion and on which a handpiece can be placed;
A sensor installed at an opening edge of the front surface of the casing assembly;
An ultraviolet lamp installed inside the casing assembly;
When the sensor confirms that the handpiece is approaching, the UV blocking film is opened. After the handpiece has entered, the UV blocking film is closed, the UV lamp is turned on for a certain period of time, then the lamp is turned off, and the UV blocking film is opened again. A control circuit for controlling the UV blocking film to be closed after the handpiece is pulled out;
A sterilizer for a dental handpiece including a motor that opens and closes a door portion by a signal generated by the control circuit.   The control circuit has a function of calculating the speed at which the handpiece enters or the thickness of the handpiece from the signal input from the sensor, and adjusting the opening speed of the door portion according to the calculated value. The disinfector for a dental handpiece according to claim 1, wherein A casing assembly in which an opening is formed on the front surface for entering and exiting the handpiece;
The ultraviolet blocking film cut in a radial shape opens and closes the front opening of the casing assembly, and the ultraviolet blocking film is opened at the time of standby and sterilization, and is closed at the time of sterilization. Door part,
A transparent tube that is installed inside the casing assembly so as to communicate with the door portion and on which a handpiece can be placed;
A sensor installed around a transparent tube inside the casing assembly;
An ultraviolet lamp installed inside the casing assembly;
When the sensor confirms that the handpiece has entered by the sensor, the ultraviolet blocking film is closed, the ultraviolet lamp is turned on for a certain period of time, then turned off, and the ultraviolet blocking film is reopened, and
A sterilizer for a dental handpiece including a motor that opens and closes a door portion by a signal generated by the control circuit.   4. The reflection protector for preventing the external leakage of ultraviolet rays by inserting the transparent tube and the ultraviolet lamp is installed in the casing assembly, according to any one of claims 1 to 3. Disinfectant for dental handpieces.   4. The dental handpiece according to claim 1, further comprising a blower fan for discharging heat generated by the ultraviolet lamp on one side of the casing assembly. Disinfectant.   2. The pile assembly according to claim 1, further comprising a pile tray having a plurality of pile holes that are opened and closed by a cover and can be sterilized by sandwiching a dental pile. The sterilizer for a dental handpiece according to any one of claims 3 to 4. 7. The sterilizer for a dental handpiece according to claim 6, further comprising a fragrance tray that is housed in a drawer manner around the blower fan and contains a fragrance inside.

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