JP3483590B2 - Fluid ejection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid discharge device for generating a pulsed pulsating flow used for cleaning and massaging a part of a body such as an oral cavity and a hair. Is involved. 2. Description of the Related Art Conventionally, there are two methods for obtaining a pulsed pulsating flow: an electric drive type such as a motor-driven pump type and a rotary valve type; and a hydraulic drive type using a flexible tube or the like. Was. [0003] However, in the above-mentioned technology, the electric drive type is difficult to reduce in size mechanically, and in particular, the one using an external unit is too large to carry, and both water and electricity are used. There is a disadvantage that the use place is limited because of using. The hydraulic drive type is a small handpiece type, but has a drawback that the mechanism is complicated and a failure easily occurs. Further, since both the electric drive type and the hydraulic drive type are complicated mechanisms, their manufacture and assembly are difficult and cost is high. An object of the present invention is to provide a low-cost, low-cost fluid ejecting apparatus which eliminates the above-mentioned disadvantages. [0005] In order to solve the above problems, as a method of obtaining a pulsed pulsating flow with a minimum number of movable parts, an inflow port and an outflow port are provided in a fluid passage. A chamber is provided, in which a spherical motion element that moves in response to the fluid motion contained in the chamber closes the outlet according to the flow direction of the fluid due to the fluid pressure difference inside the chamber, and the chamber is caused by closing the outlet. -The moving element separated from the outlet by the change of the internal fluid pressure is constructed and arranged so as to continuously move on the circulating flow generated inside the chamber. The fluid flowing out of the outlet by the above means is intermittently interrupted by the moving element to form a pulsed pulsating flow. An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a mouth rinse device including the principle of the present invention. Water sent from a tap or a water storage device passes through a liquid passage 14 provided in the handpiece 12, and is jetted into the chamber 13 from an inlet 16. In response to the jet flow from the inflow port 16, the motion element 18 repeats the motion of closing the outflow port 17, and sends out a pulsed pulsating flow to the outflow passage 15 to be jetted from the nozzle 10. FIG. 2 is a sectional view at the moment when the moving element 18 is located at a position where the outflow port 17 is opened.
6, and moves toward the outlet 17. FIG. 3 is a cross-sectional view at the moment when the motor 18 is located at the position where the outlet 17 is closed. When the outlet 17 is closed, a turbulent flow occurs in the chamber 13, and the motor 18 is moved to the outlet 17. More peel off. The movement element 18 is provided in the chamber 13
It moves on the flow from the outlet 17 to the inlet 16 of the circulating flow generated therein. The motion shown in FIGS. 2 and 3 is continued, and a pulsed pulsating flow is jetted from the nozzle 10 as needed. FIGS. 4 and 5 are partial cross-sectional views of FIG. 1 with the addition of a device for switching between a pulsating flow and a normal water flow. FIG.
In this state, the motion element 18 can freely move,
The pulsed pulsating flow is sent out to the outflow passage 15. In FIG. 5, the switching device is in an activated state, and when the push button 19 is pressed, the push pin 21 presses down the movement element 18 to make it unable to move, and sends out a normal water flow to the outflow passage 15. The switching device shown in FIGS.
When the circulating flow in the chamber 13 is completely stopped by closing the nozzle 10 during the pulsating flow injection or the like, the motion element 18 functions as a valve with the outflow port 17 closed, so that the movement is performed again. It can also be used as a starter to start the movement of the child 18. FIG. 6 shows a variation of the shape of the motor, and FIG. 6A shows a case where a part of the spherical shape is a plane. FIG. 6B shows a spherical surface with slits. FIG. 6C shows a case where dimples are provided on a spherical surface. FIG. 6 (D) shows a multi-faceted spherical surface. FIG. 6E shows a ball having a smooth spherical surface. As described above, according to the present invention, a pulse-shaped pulsating flow can be easily obtained by installing a chamber containing a moving element in a fluid passage. In another aspect, a low-cost fluid discharge device that is simple in structure, can be downsized, and is easy to manufacture and assemble can be provided. [0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a mouth washer incorporating the principles of the present invention. FIG. 2 is a partial cross-sectional view of FIG. 1 with an outlet 17 in an open state. FIG. 3 is a partial cross-sectional view of FIG. 1 with an outlet 17 in a closed state. FIG. 4 is a partial cross-sectional view of FIG. 1 with a device for switching between pulsating flow and normal flow added. FIG. 5 is a sectional view showing a state where the switching device of FIG. 4 is operated. FIG. 6 is a diagram showing a variation of the shape of a motor. FIG. 7 is a diagram showing an example of the shape of a chamber. DESCRIPTION OF SYMBOLS 10 Nozzle 11 O-ring 12 Handpiece 13 Chamber 14 Liquid passage 15 Outflow passage 16 Inlet 17 Outlet 18 Movement element 19 Push button 20 Retaining fitting 21 Push pin 22 O-ring receiving fitting 23 Spring 24 O-ring

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F15C 3/16 B05B 1/08 A61C 17/02 A61C 17/028

Claims (1)

(57) Claims 1. A spherical motion element is accommodated in a chamber having an inlet and a single outlet, and the motion element responds to the motion of the fluid in the chamber. The fluid discharge device is characterized by intermittently shutting off the outlet by moving the fluid, thereby obtaining a pulsed pulsating flow.