JPH05329176A - Automatically water-supplying device for dental cup - Google Patents

Abstract

PURPOSE:To easily detect the existence of a light-weight cup and the amount of water supply by a magnetic sensor in a non-contact state to removably support a cup stand. CONSTITUTION:A main body 1 is fitted into a mounting surface 2 therefor through an O-ring and a magnetic sensor 3 is provided on the inside of a projection part 1a formed at the center of the upper surface of the main body 1. Furthermore, two springs 6, 7 are fixed in a standing state, in the vicinity of the projection part 1a at the upper surface of the main body 1. A cup stand 4 is removably placed on the upper ends of these two springs 6, 7 and a metallic plate 5 is stuck on the undersurface at the center of the cup stand 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic cup water supply device for automatically controlling the water supply of a dental treatment cup.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for automatically controlling water supply to a dental treatment cup, there is an invention described in Japanese Utility Model Publication No. 56-4006. In the cup presence detection and water supply amount detection of the above invention, the amount of bending of the coil spring or the like is changed by rotating the cup saucer, and at the position where the cup weight or the water supply weight is balanced, the contact switch or the non-contact switch is turned on, It was turned off and the solenoid valve for water supply was controlled.

However, in the above invention, since the amount of bending of the coil spring or the like is changed by rotating the cup tray, the bending adjusting shaft portion must be opened, and overflow water flows from this portion to the inside. There was a flaw to penetrate. In order to eliminate this drawback, although a drainage groove is provided around the cup water supply device, it is difficult to remove the cup saucer due to its structure, and it is difficult to ensure easy cleaning and infection prevention. It was

Therefore, the following inventions have been proposed to solve the above drawbacks. For example, JP-A-2-26875
In the invention described in Japanese Patent Publication No. 7, as shown in FIG. 3, the main body 53 is attached to the concave portion of the attachment surface 51 via the O-ring 52. On the upper surface of the main body 53, a cup holder 55 on which the cup 54 is placed is provided. A projecting portion 56 is attached to the center of the lower surface of the cup receiving base 55, and the lower end of the projecting portion 56 is connected to an elastic beam 57 stretched around the main body 53.

A strain gauge 58 is attached to the lower surface of the elastic beam 57. The strain gauge 58 is connected to a control circuit 59, and a water amount setting switch 60 and a water supply solenoid valve 61 are connected to the control circuit 59. The water supply solenoid valve 61 is provided on a pipe 62 from a water supply source (not shown), and the pipe 62 is connected to a water supply port 63 for supplying water to the cup 54. The invention of the above-mentioned configuration detects the amount of water supply by the detector using the strain gauge 58.

[0006]

However, the invention described in JP-A-2-268757 has the following drawbacks. That is, since a special technique is required to attach the strain gauge 58, the workability is poor and the structure is complicated, so that it is expensive. Further, the strain gauge 58 has a structure attached to the elastic beam 57, and it is difficult to generate a strain sufficient to detect a lightweight cup such as a paper cup due to its elastic force, and it is impossible to detect the lightweight cup. It was Further, there is a drawback that a stable water supply cannot be obtained because the distortion state varies depending on the position of the cup and the use of the raised bottom cup.

Therefore, the present invention was developed in view of the above-mentioned drawbacks of the prior art, and it is possible to easily detect the presence or absence of a lightweight cup, the reliability is high, and the cup holder can be attached and detached. The purpose of the present invention is to provide an inexpensive automatic dental cup water supply device that can be easily cleaned.

[0008]

SUMMARY OF THE INVENTION The present invention is an automatic dental instrument for detecting the displacement of a cup holder caused by the weight of a cup and the amount of water supplied to the cup by a magnetic sensor to detect the presence or absence of the cup and control the amount of water supplied to the cup. In the cup water supply device, the magnetic sensor has a waterproof structure, and the cup holder is detachably supported by at least one elastic member.

[0009]

In the present invention, the presence or absence of a lightweight cup can be easily detected, and the cup holder can be easily attached and detached.

[0010]

1 and 2 show the present embodiment, FIG. 1 is a partial sectional view showing the outline, and FIG. 2 is an enlarged sectional view of an essential part of FIG. The main body 1 is fixed to the mounting surface 2 via an O-ring 8. A magnetic sensor 3 is provided inside the convex portion 1 a at the center of the upper surface of the main body 1. Further, two springs 6 and 7 are fixed upright in the vicinity of the convex portion 1a on the upper surface of the main body 1. On the upper ends of the two springs 6 and 7, a cup holder 4 made of metal or resin on which the cup 9 is placed is detachably placed. A metal plate 5 is attached to the lower surface of the center of the cup holder 4.

The magnetic sensor 3 is connected to the control circuit 10, and the control circuit 10 is connected to a water amount setting switch 13 and a water supply solenoid valve 11. The water supply solenoid valve 11 is provided in a pipe 14 from a water supply source (not shown), and the pipe 14 is connected to a water supply port 12 for supplying water to the cup 9.

In the automatic dental cup water supply apparatus having the above-mentioned structure, when the lightweight cup 9 is placed on the cup holder 4, the springs 6 and 7 are displaced. The magnetic sensor 3 detects the amount of displacement with respect to the metal plate 5, and the control circuit 10 obtains a voltage signal value according to the weight.

Here, the preset reference voltage signal value corresponding to the weight of the cup 9 is compared with the voltage signal value obtained from the magnetic sensor 3 to detect the presence or absence of the cup 9 on the cup holder 4. Then, the water supply solenoid valve 11 is opened and water supply is started from the water supply port 12. When water supply is started, the springs 6 and 7 are displaced, and the control circuit 10 compares both the voltage signal value of the water supply amount set in advance with the water amount setting switch 13 and the voltage signal value obtained from the magnetic sensor 3, and both are When they are equal, the water supply solenoid valve 11 is closed.

According to this embodiment, it is possible to easily and reliably detect the presence or absence of a lightweight cup on the cup holder and the desired water supply amount. Further, even if water overflows for some reason, there is no opening, so that water does not enter the device. Furthermore, cleaning can be easily performed by removing the cup holder.

In this embodiment, the springs 6 and 7 are used as the support means of the cup holder, but the present invention is not limited to this, and at least one or more elastically deformable springs 6 and 7 can be used. The cup cradle can also be supported by other members.

[0016]

As described above, according to the automatic dental cup water supply device of the present invention, the presence or absence of the cup and the amount of water supply are detected by the non-contact magnetic sensor, so that the mechanical contact is achieved. Since there is no part, highly reliable detection can be performed. Further, since the structure is simple, it can be provided at a low cost. In addition, the cup holder can be attached and detached, which makes cleaning easy and can greatly contribute to the prevention of infection.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an outline of a first embodiment.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a partial cross-sectional view showing an outline of a conventional example.

[Explanation of symbols]

 1 Main body 1a Convex part 2 Mounting surface 3 Magnetic sensor 4 Cup holder 5 Metal plate 6 Spring 7 Spring 8 O-ring 9 Cup 10 Control circuit 11 Water supply solenoid valve 12 Water supply port 13 Water quantity setting switch 14 Pipe

Claims (1)

[Claims] 1. An automatic dental cup water supply device for dental use, which detects a cup sensor displacement caused by a cup weight and a cup water supply amount by a magnetic sensor to detect the presence or absence of the cup and control the water supply amount of the cup. Is a waterproof structure, and the cup pedestal is detachably supported by at least one or more elastic members.