JPS6057341B2 - Pressure feeding device for physiological saline, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that pumps physiological saline to the treatment area during dental treatment to prevent heat generation during the grinding and to clean the ground tooth powder. It is.

When treating cavities, it is said that grinding with a high-speed cutter causes the tooth structure to become brittle due to the generation of frictional heat at the grinding location. In view of the inconvenience of not being able to fully utilize the performance, we have developed a method to continuously supply cooling physiological saline or water to the grinding part at the required pressure to cool the part while grinding. protect from heat,
The purpose is to improve the efficiency of grinding work and to enable dental caries treatment to be carried out with peace of mind.

The present invention will be explained below based on embodiments shown in the drawings.

Reference numeral 1 denotes a housing of the pressure feeding device of the present invention, and a holder 3 for removably holding a container 2 containing physiological saline, water, or other liquid is attached to the front face of the housing. A small reciprocating compressor 4 is provided inside this housing, and a solenoid valve 7 for pressure release is provided between a check valve 6 connected to the compressor 4 via an air filter 5 and the container 2. 8 is an air supply hose that connects the compressor 4 and the container 2.

Reference numeral 9 denotes a hose that pressure-feeds the physiological saline in the container 2 toward a cutter (not shown), and the hose 9 is inserted into a liquid shearing device 10 with a flow rate regulator, which will be described later, to cut off the flow of the physiological saline. FIG. 5 shows the same device 10, and the details thereof will be explained below.

The liquid shearing device 10 with a flow rate regulator includes a solenoid 11,
The solenoid plunger 12 is equipped with a hose pressure rod 13 that can move up and down together with a return spring 14 and an adjustment screw 15. When the solenoid 11 is not energized, the pressure rod 13 is pushed down by the pressing action of the return spring 14. A pressure feed hose 9 inserted horizontally in a direction perpendicular to the pressure rod 13
When the solenoid plunger 12 is crushed with its lower end face and energized to the solenoid 1, the solenoid plunger 12 resists the elastic force of the return spring 14.
At the same time as the pressure rod 13 rises, the pressure feed hose 9
By turning the adjusting screw 15, the lifting limit of the solenoid plunger 12 is adjusted, thereby increasing the amount of release of the pressure feed hose 9 by the pressing rod 13, in other words. It is now possible to finely adjust the degree of squeezing of the hose.

In addition, 16 and 17 are a forked fork and a connecting pin that constitute a connecting part between the solenoid plunger 12 and the pressing rod 13, 18 is a return spring receiver formed integrally with the pressing rod 13, and 19 is formed on the lower end surface of the adjusting screw 15. 20 is the conical upper end of the solenoid plunger 12 that engages with the recess 19 when the solenoid plunger 12 is raised; 21 is a knob fixed to the head of the adjusting screw 15; 22 is a pressure hose insertion part. .

Reference numeral 23 denotes an adapter attached to the mouth of the container 2, and the first vibrator 24 opens above the inside of the container 2, and its lower end is connected to the air supply hose 8.

A liquid feeding vibrator 25 is provided concentrically outside the first vibrator 24, and its open end is submerged in the liquid. The lower end of the liquid-feeding vibrator in FIG. 2 is connected to the pressure-feeding hose 9.
Next, the circuit diagram shown in FIG. 3 will be explained.

The circuit of the device of the present invention has a first
Terminals 26, 27, second terminals 28, 29, ζ third terminal 30
, 31, a pilot lamp 32 is provided between the first terminals 26 and 27, a purge solenoid valve 7 is provided between the second terminals 28 and 29, and a compressor 4 and a pressure switch 33 are provided between the third terminals 30 and 31. are connected to each other in a parallel circuit, and a drive circuit for a liquid cutoff device 10 having a foot switch 34, a silicon rectifier 35, and a solenoid 11 is connected to the R terminal of the AC power source.

36 is a two-pole interlocking switch, and the foot switch 34 arranged in series with the switch 36 also serves as a starting switch for a high-speed cutter drive motor (not shown).

Next, the operation of the present invention will be explained.

When the power switch 36 is turned on and a part of the power supply is closed, the pilot lamp 32 lights up, the compressor 4 and the barge solenoid valve 7 are set to 0N, the discharge side flow path of the compressor 4 is cut off from the outside air, and the air is not sent. Air is sent from the compressor into the saline container 2 via the air hose 8 .

The pressure switch 33 is activated by adjusting the pressure inside the container 2, and increases the pressure inside the container 2, but when the pressure inside the container 2 reaches the set pressure, the pressure switch 33 turns 0F.
F, and compressor 4 is stopped. Next, when a foot pedal (not shown) is stepped on and the associated switch 34 is operated, the solenoid 11 is energized, raising the hose pressing rod 13 and weakening the pressing force on the hose 9 by the lower end of the pressing rod 13. .

At this time, the physiological saline solution 9 in the container 2 whose internal pressure has been increased in advance as described above is supplied to the cutter section (not shown) via the hose 9 at the desired pressure and flow rate, and the saline solution is supplied from the same section to the cutter section (not shown). The grinding part is cooled and the ground tooth powder is washed away. Incidentally, since an air filter 5 and a check valve 6 are interposed between the compressor 4 and the pressure switch 33 as shown in the block diagram of FIG. 4, impurities such as dirt may enter the container 2. Moreover, the air in the container 2 will not flow back to the compressor 4 via the hose 3. The present invention has the configuration and operation as described above, and the power switch 36 is turned off.
When the purge solenoid valve 22 is turned to N, the purge solenoid valve 22 is closed and the inside of the container 2 is isolated from the outside air, so that the pressure inside the container 2 can be increased to the required pressure, and when the air pressure inside the container 2 is increased to the set value. , the pressure switch 33 is automatically turned OFF and the compressor 4 is stopped.

Additionally, when the physiological saline in the container 2 is pumped to the outside and the pressure in the container 2 falls below the set value, the pressure switch 3 is automatically turned on.
3 becomes 0N and operates the compressor 4, and the container 2
The action of increasing the internal pressure again to the set value is performed repeatedly. Next, operate the foot pedal (not shown) to switch 3.
4 is set to 0FF, the hose pressure rod 13 descends again to pressurize the hose 9, and the hose 9 is cut off, so that no saline is supplied to the cutter. When you turn off the power switch 36, the purge solenoid valve 22
opens, the air inside the container 2 escapes, and the force returns to atmospheric pressure.
As described above, the present invention enables the physiological saline in the container to be pumped using compressed air, so that the physiological saline can be used to the end without wasting it. Furthermore, the compressor 4 operates according to the pressure inside the container, which reduces power consumption, and once the pressure inside the container is increased to the required pressure by the compressor 4, physiological saline or water is delivered at that pressure. The flow rate is adjusted by squeezing the liquid hose, so there is no pulsation in the saline or water being pumped, and a constant amount of physiological saline, etc. can always be pumped at the required pressure, and the flow rate can be easily finely adjusted. It also has the advantageous feature that it can be shut off temporarily as needed, allowing the teeth to be efficiently cooled and cleaned during grinding.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is an overall perspective view showing one usage example, FIG. The figure is an overall wiring diagram, FIG. 4 is a block diagram, and FIG. 5 is a longitudinal sectional front view of the liquid shedding device with a flow rate regulator. 1 is a housing, 2 is a container, 4 is a compressor, 8,
9 is a hose, 10 is a liquid shearing device with a flow rate regulator, 33
is a pressure switch.

Claims (1)

[Claims] 1. A compressor for supplying compressed air and a pressure switch, which are connected to each other with an air supply hose via an air filter and a check valve, are placed in a housing that removably holds a container containing a liquid such as physiological saline, and a pressure switch inside the container. A purge solenoid valve for discharging the pressure of and an adjustment screw for regulating the rise limit of the pressure, and the hose for force-feeding liquid from the container to the nozzle is inserted horizontally in a direction perpendicular to the pressure rod and is removably held in the hose insertion part. The lower end of the rod is attached so as to be retractable, and on the other hand, a switch that also serves as a drive switch and a power switch are provided outside the housing, and the flow rate can be adjusted by compressing the hose with the lower end surface of the pressing rod of the liquid cutoff device. and a pressure-feeding device for physiological saline, etc., which is shut off.