JPH0615613U - Dental automatic water cutoff device - Google Patents

Abstract

(57) [Summary] [Purpose] To achieve an automatic water cutoff device that can supply a predetermined amount of water to a cup during dental treatment with a simple structure that allows easy maintenance and inspection. [Structure] A dish stand 7 on which a water supply cup is placed is provided on an upper end portion of a shaft-like member 9 which is held in a support stand 8 arranged below the cup stand 7 so as to be able to move up and down. At the upper end of the shaft-shaped member, an infrared ray detection control device 14 is provided which senses whether or not the water supply cup is placed on the dish stand. Further, a weight detector is provided which is operated in response to the movement of the shaft-like member in the support base and detects that the water supply cup has been supplied with a predetermined amount of water or more. The weight detector and the infrared detection control device detect the presence or absence of the water supply cup on the plate and the level of the amount of water in the cup, and selectively control the water supply and water cutoff.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dental red line automatic water supply / water interruption device capable of accurately and appropriately controlling water supply and water interruption as needed.

[0002]

[Prior art]

 Conventionally, as this type of dental automatic water supply / water interruption device, those shown in FIGS. 5 and 6 (a) and (b) have been known. To briefly explain this, in these figures, reference numeral 1 denotes a paper cup 1A as a water supply cup used in dental treatment by receiving an actual water supply therein, as shown in FIGS. ) The steel cup mounted in the state shown in (2), 2 is water poured into the paper cup 1A from a water supply port (not shown), 3 is a dish stand on which the steel cup 1 is placed, and the dish stand 3 is It is supported in a vertically movable state on a support base 33 composed of a downward cup-shaped base lid 31 and a base 32 that closes the lower end opening thereof.

Reference numeral 5 is a mechanical switch that is provided inside the support stand 33 and that conducts when the steel cup 1 is placed on the dish stand 3 and is pushed down by the weight of the steel cup 1 to control water supply and water cutoff to the paper cup 1A. , The first contact 51 that is elastically deformed by the first control button 4 that is displaced downward with the downward movement of the steel cup 1 of the dish base 3 and the dish base 3 in the paper cup 1A by a predetermined amount. The second contact 52 is elastically deformed by the second control button 6 which is displaced downward with the descending operation when the water 2 is accumulated.

In the figure, 41 and 61 are leaf springs that elastically support the first and second control buttons 4 and 6, and 34 is a protrusion that is provided below the dish base 3 and is normally formed by a coil spring 35. When the weight of water stored in the steel cup 1 and the paper cup 1A is urged upward, it descends and is moved by the first and second control buttons 4 and 6 via the leaf springs 41 and 61. It is a shaft portion that applies a pressing force to the contacts 51 and 52 to control the opening and closing of the switch 5 by the contacts 51 and 52.

In such a configuration, when the steel cup 1 is placed on the dish base 3, and the dish base 3 is pushed down by the weight of the steel cup 3 against the biasing force of the coil spring 35. At first, the first control button 4 is moved downward by elastic deformation of the leaf spring 41, and the contact 51 is pushed down to come into contact with the contact 52 to conduct electricity. The existing launch solenoid valve is opened, water is supplied from the water supply port, and water is injected into the paper cup 1A placed in the steel cup 1.

Further, when the amount of water poured into the paper cup 1A reaches a certain limit level, and the weight of the amount of water in the paper cup 1A in addition to the weight of the steel cup 3 acts on the dish stand 3, the plate cup 3 further descends. The movement of the dish base 3 causes the second control button 6 to push down the second contact 52, whereby the first contact 51 and the second contact 52 are separated from each other, and the switch 5 is opened. The launch solenoid valve is closed and the pouring of water 2 is stopped.

[0007]

[Problems to be solved by the device]

 However, the conventional dental automatic water supply and water shutoff device having the above-mentioned configuration has various drawbacks as listed below. Water must be supplied using the weight of the steel cup 1. For example, when only the paper cup 1A is used, water supply cannot be started, and the water supply and water cutoff functions cannot be exerted. If only the steel cup 1 is placed and the paper cup 1A is not placed, the functions of water supply and water cutoff can be obtained, but since the steel cup 1 must be used for treatment such as mouth rinse, it causes a problem from the viewpoint of hygiene. .

When the steel cup 1 is placed, and further the paper cup 1A is placed in the steel cup 1 and water 2 is injected, the paper cup 1A is lifted up and used for mouth rinsing, etc. Since the weight is added to the dish table 3, the dish table 3 keeps the closing operation of the switch 5 for bringing the contacts 51 and 52 into conduction as described above, and as a result, the water flow is not stopped and the steel cup 1 Water will be poured inside, and if you do not return the paper cup 1A into the steel cup 1, the water will overflow and you will be in a confused situation. The mechanical switch 5 that senses the weight on the plate 3 has a complicated structure that is a combination of the first and second control buttons 4 and 6 held by the leaf springs 41 and 61 and the contacts 51 and 52. There are problems that the number of parts is large, assembly is troublesome, manufacturing cost rises, maintenance and inspection work is difficult to perform, and switch sensitivity is low.

For this reason, in the conventional automatic water supply and disconnection device for dentistry having the above-described structure, in addition to the mechanical switch 5 accompanying the descending operation of the dish base 3 due to the amount of water into the steel cup 1 and the paper cup 1A, a timer is provided. It is considered that the water is used for water supply and water cutoff control, and it is considered that the water supply amount for each time is made constant by this water supply stop control by the timer.

However, according to such a structure, if the paper cup 1A is placed on the steel cup 1 in a state where the water 2 in the paper cup 1A is not used up, for example, water may be injected again depending on its weight. Moreover, since the water is continuously supplied for a certain period of time by the timer and the water supply is not stopped until the predetermined amount is reached, there is a problem that the water 2 becomes full and overflows into the paper cup 1A.

In order to solve such a problem, it is considered that water supply and water cutoff control are performed by infrared ray detection. In order to do so, the dish stand 3 on which the paper cup 1A is placed, and other configurations Not only do the parts have to be completely new, designed and manufactured, which is costly, but it also requires the replacement and disposal of all conventional equipment currently used in dentistry and the purchase and installation of new equipment. However, it is inefficient in terms of equipment cost, and it is desirable to take some measures to eliminate such problems.

The present invention has been made in view of the above circumstances, and can perform water supply and water cutoff control accurately and appropriately as needed, regardless of a simple structure, and a part of the conventional device. The objective is to obtain an automatic dental water supply and disconnection device that can be easily installed by exchanging only parts, starts manufacturing costs, and is excellent in terms of equipment costs.

[0013]

[Means for Solving the Problems]

 In order to meet such a demand, the dental automatic water shutoff device according to the present invention is provided with a dish stand on which a water supply cup is placed, a support stand arranged below the dish stand, and an upper part inside the dish stand. Detects whether there is a shaft-shaped member that is held so that it can move up and down in a biased state and that has a dish stand at its upper end, and whether a water supply cup is placed on the dish stand that is provided at the upper end. Infrared detection control device and a weight detector that operates in response to the movement of the shaft-shaped member in the support table to detect that a certain amount of water has been supplied to the water supply cup. The water supply cup and the infrared detection control device detect whether the water supply cup is placed on the dish stand or the amount of water in the water supply cup exceeds a certain amount, and selectively control water supply and water cutoff to the water supply cup. It is provided with a control means for controlling.

[0014]

[Action]

 According to the present invention, the infrared sensing control device capable of sensing the mounting state of the water supply cup on the dish base supported on the support table so as to be able to move up and down enables the water supply state to supply water to the water supply cup. At the same time, the weight detector that senses whether or not the weight of the water supply to the water supply cup exceeds a predetermined value, and when the water supply amount reaches a certain level, the water supply is stopped and the water supply is cut off.

[0015]

【Example】

 1 to 3 show an embodiment of a dental automatic water supply / water interruption device according to the present invention. In these figures, the schematic configuration of the entire dental automatic water supply and water shutoff apparatus will be briefly described with reference to FIGS. 1 and 2. In the figures, reference numeral 7 indicates a paper cup, which is a mouth rinse container, not shown 8 is a platen having a plurality of supporting portions 72 along the circumferential direction so as to be placed on the platen, and 8 is a support table which is arranged below the platen 7 and supports the platen 7 so as to be vertically movable. Reference numeral 8 is composed of a base lid 82 having a substantially downward cup shape, and a base 15 screwed and fixed so as to close the lower end side opening of the base lid 82.

Reference numeral 9 denotes a vertically extending shaft-like member that is disposed so as to penetrate through an axial center portion in the support base 8 formed by the base lid 82 and the base 15. The shaft-like member 9 includes a shaft rod 93, The fitting plate 92 and the wire connecting plate 91 are fitted on the upper end of the shaft rod 93 in a stacked state, and the protruding end member 90 is screwed on the upper end of the shaft rod 93. ing. On the other hand, an elastic contact (not shown) is provided on the lower end side of the protruding end member 90, and the elastic contact is brought into close contact with the wire connection plate 91 to prevent contact failure. In the figure, 910 and 920 are through holes of the wire connection plate 91 and the fitting plate 92 into which the shaft rod 93 is fitted and inserted. The base 15 is fixed to the base lid 82 by screws 16 with screws.

Reference numeral 14 denotes an infrared ray detection control device. This infrared ray detection control device 14 is provided by adhering to an appropriate position on the upper end side in the base cover 82, and the infrared transmitter 141 and the infrared receiver 142 are the protrusions. It is incorporated and arranged in a recessed groove 901 formed at the top of the end member 90.

Here, at the central portion of the printed circuit board 145 that constitutes the above-mentioned dish stand 7, base lid 82, and infrared detection control device 14, there are corresponding circular holes 71 through which the shaft-shaped members 9 are arranged. , 81, 144 are formed, and a red photo hood 143 is capped and provided above the round hole 71 on the dish stand 7. The photo hood 143 enhances the sensing effect of the infrared sensing control device 14 and provides a waterproof function.

In addition, in the infrared sensing device 14, the electronic element 146 is mounted below the printed circuit board 145, and the long bar-shaped fixed column 147 and the similarly long bar-shaped hollow front end are screwed. A support pillar 148 having a hole is provided. The fixed column 147 penetrates the through hole 911 of the wire connection plate 91 and contacts one end of the switch coupling piece 149, and the other end of the switch coupling piece 149 is screwed and fixed to the support column 148. . As a result, the line connection plate 91 and the switch separating piece 149 are assembled and fixed. When the printed circuit board 145 is detected by the wire connection plate 91 and the infrared rays and the lead wires are connected to each other, the wire entanglement phenomenon is prevented.

Further, the lower end of the shaft rod 93 passes through the spring 10, the nut 11, the bearing stand 12, the center hole 151 of the base 15, the hole 171 of the washer 17, the shaft cap 18, and the tongue piece 19. The screw holes 191 are screwed into each other so that the screw holes 191 are incorporated in the support base 8 including the base lid 82 and the base 15. At this time, as is apparent from FIG. 2, the spring 10 is interposed around the shaft rod 93 and below the fitting plate 92 and above the nut 11, so that the shaft-shaped member 9 is placed on the plate base 7. It is always urged so as to be located above, and when a certain amount of water is supplied to the paper cup, its weight causes it to drop against the resilience.

The magnitude of the elastic force of the spring 10 is adjusted by tightening the nut 11, and the rotation of the nut 11 is adjusted by the screw 16 on the inner side surface of the base 15. It can be controlled by an L-shaped hooking lever 13 fixed by screws.

In addition, the nut 11 is screwed into the upper screw portion 121 of the bearing base 12, and then the lower screw portion 122 is penetrated into the center hole 151 of the base 15 and the hole portion 171 of the washer 17 to form a shaft cap. It is fixed by being screwed into a screw hole formed inside 18 (see FIG. 2 and the like).

Then, the infrared detection control device 14 as described above determines whether or not a paper cup (not shown) is placed on the dish stand 7, and the launch solenoid is activated by the control circuit shown in FIG. The valve is controlled to open and close.

In the above configuration, the amount of water supply in the paper cup gradually increases, and thereby the weight applied to the plate stand 7 increases, and the plate stand 7 as a whole descends to exert a pressing force on the protruding end member 90. Then, when the spring 10 is lowered against the repulsive force, the wire connecting plate 91 assembled to the lower side of the projecting end member 90 pushes down the switch coupling piece 149 smoothly, which causes the switch The water supply is stopped and the launch solenoid valve (see Fig. 4) is closed, water supply is stopped and the water is cut off.

On the other hand, when the amount of water in the paper cup decreases, the weight acting on the platen 7 decreases, so that the ejection end member 90 smoothly rises due to the elastic force of the spring 10. When the switch engaging piece 149 is turned on, the launch solenoid valve is opened to start water supply, and when the amount of water in the paper cup reaches a predetermined amount, the switch is turned off and water supply is performed as described above. The water supply will be suspended and the water supply will be stopped.

That is, a so-called weight detector is configured by the shaft-shaped member 9, the printed circuit board 145, and the switch engaging / disengaging piece 149 described above, which simplifies the conventional complicated structure and It is possible to improve the sensitivity.

FIG. 4 shows a control circuit by the infrared sensing control device 14. When the paper cup 1A is placed on the plate stand 7, the signal sent by the infrared transmitter 141 is the bottom of the paper cup 1A. The signal is reflected by the end and is received by the infrared receiver 142, converted into an electronic signal, and the electronic signal is transmitted to the signal detector 20. In this case, the signal is detected and its main work is started, a standard position comparison of the signal is performed, the signal is a relatively strong infrared signal, and the signal is caused by the incidence of light from another light source. You should not receive.

Then, the presence or absence of the paper cup 1 A is detected by the above-mentioned signal, and this is transmitted to the delay circuit 21 and the time calculation circuit 22. Here, the delay circuit 21 described above is mainly for preventing "the water does not flow out unless the paper cup 1A is completely placed on the plate 7", and the delay time is about About 2 seconds is preferable. In addition, the time calculation circuit 22 prevents a too large amount of water from flowing out in the case of "weight detector failure", and can stop the water from flowing out for an appropriate time. . The weight detector may be configured by mechanical elements other than the infrared sensing control, such as the dish stand 7, the shaft member 9, the spring 10, and the switch engaging / disengaging piece 149.

On the other hand, the control circuit 23 combines the delay signal and the time calculation signal with the gate body control signal to control the semiconductor gate switch 24 and the weight detection micro switch 25 to start the launch solenoid valve 26. Then, the water 2 may be poured into the paper cup 1A as needed.

Here, when the amount of water in the paper cup 1A reaches the set weight, it is advisable to touch the micro switch 25 constituting the weight detector, close the launch solenoid valve 26, and stop pouring water. It should be noted that this weight setting may be set to a desired state by changing and controlling the tension of the spring 10 by the rotation of the tray 7 which constitutes the weight detector.

The present invention is not limited to the structure of the above-described embodiment, but the shape, structure, etc. of each part of the automatic dental water supply / water cutoff device can be appropriately modified or changed, and various modified examples are possible. . For example, the shape and structure of the shaft-shaped member 9 that is liftably supported on the support base 8 of the dish base 7, the infrared detection control device 14 for this, and the attachment structure of the weight sensor, etc. are limited to the structure of the embodiment. Of course not.

[0032]

[Effect of device]

 As described above, according to the dental automatic water shutoff device of the present invention, the dish table on which the cup for water supply is placed, the support table arranged below the dish table, and the inside of the dish table are normally upward. Whether the shaft-shaped member that is held so as to be able to move up and down while being biased by the upper end and has the dish stand at its upper end and the water supply cup placed on the dish stand at the upper end It is equipped with an infrared sensing control device that senses water and a weight detector that is activated in response to the movement of the shaft-shaped member within the support table and senses that the water supply cup has been supplied with more than a certain amount of water. The detector and the infrared detection control device detect whether the water supply cup is placed on the dish stand or the amount of water in the water supply cup is above a certain amount, and selectively supplies or cuts water to the water supply cup. Since a control means for controlling the Nevertheless, it not only eliminates the various drawbacks of the conventional device and allows accurate and appropriate water supply and water cutoff control, but also stops the conventional steel cup and directly uses the paper cup as a water supply cup. It can be used to supply water and prevent water from overflowing from the paper cup, and the mechanical detection device and infrared detection control device with a simple structure can improve the sensitivity, etc. Furthermore, it has excellent versatility with conventional products, and it can be dealt with by exchanging some of the parts as required, which is also advantageous in terms of equipment cost.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a main part configuration showing an embodiment of an automatic dental water supply cutoff device according to the present invention.

FIG. 2 is a schematic exploded perspective view for explaining a configuration of a main part of the dental automatic water supply / water interruption device according to the present invention shown in FIG.

FIG. 3 is a schematic cross-sectional view showing a main part configuration of the automatic dental water supply / water interruption device according to the present invention shown in FIGS. 1 and 2.

FIG. 4 is a block diagram illustrating a control circuit of an infrared sensing device in the dental automatic water supply / water interruption device according to the present invention.

FIG. 5 is a schematic perspective view showing a configuration of a main part of a conventional dental automatic water supply water shutoff device.

FIG. 6 is a schematic cross-sectional view showing use states of the conventional dental automatic water supply / water interruption device shown in FIG. 5 in (a) and (b).

[Explanation of symbols]

 1A Paper cup 7 Dish base 8 Support base 82 Base lid 9 Shaft member 10 Spring 11 Nut 12 Bearing base 13 Hooking lever 14 Infrared sensing device 141 Infrared transmitter 142 Infrared receiver 145 Printed circuit board 147 Fixed column 148 Support column 149 Switch Separation piece 15 Base 17 Washer 18 Shaft cap 19 Tongue piece

Claims (1)

[Scope of utility model registration request] 1. A dish table on which a water supply cup is placed, a support table arranged below the dish table, and a support table which is always urged upward in the support table so that it can be moved up and down. A shaft-shaped member provided with the dish base at an upper end, an infrared ray detection control device provided at an upper end of the shaft-shaped member for sensing whether or not a water supply cup is placed on the dish base, A weight detector that is operated in response to the movement of the shaft-like member in the support table to detect that a certain amount or more of water has been supplied to the water supply cup, and the weight detector and the infrared detection control A signal from the device is used to detect whether the water supply cup is placed on the plate and whether or not the amount of water in the water supply cup is above a certain amount, and supply or cut off water to the water supply cup. Dental for which a control means for selectively controlling is provided Automatic water shutoff device.