JP2550651Y2 - Nozzle assembly for liquid biasing device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a liquid urging device such as an oral hygiene device for driving a pump to urge a liquid and discharging the liquid from a nozzle to clean the inside of the oral cavity and massage the gums. Applicable to More specifically, the present invention relates to a nozzle assembly to be mounted on a connecting portion on the apparatus main body side in such a liquid urging device.

[0002]

2. Description of the Related Art Conventionally, for example, in an oral hygiene apparatus, the pressure of a liquid discharged from a nozzle has been adjusted by the following means. (1) Adjust the pressure of the pump for urging the liquid. (2) Adjust the amount of a part of the liquid urged by the pump to be returned to the suction side of the pump.

However, in the conventional means of (1) and (2), it is necessary to correctly adjust the pressure to a desired pressure each time it is used. And felt uncomfortable. Therefore, conventionally, there has been a device in which the maximum discharge pressure is limited in advance as in the following other means.

(3) For example, a structure in which the liquid pressure of a pump is limited to a certain low range. (4) As shown in FIG. 3, a relatively small inlet 1b is opened in the base 1a of the nozzle 1. Then, the base 1a is waterproof O
The holder 2 is inserted into the holder 2 via the ring 3.
The discharge passage 2a in the inside and the discharge passage 1c in the nozzle 1 are connected through a small inflow port 1b.

[0005]

However, in the conventional means of (3), even if it is desired to use a pressure higher than a predetermined low discharge pressure, the desired discharge pressure is maintained as it is unless the pump is modified. It cannot be adjusted for use. In the conventional means of (4), the discharge path 2a
If the pressure of the liquid inside the container becomes too high, the base 1a may be pushed by the high-pressure liquid and the nozzle 1 may come off.

Accordingly, an object of the present invention is to make it possible to easily adjust the maximum discharge pressure, to prevent the liquid from being discharged at a certain high pressure even if the pressure adjustment is erroneous,
An object of the present invention is to prevent nozzle dropout caused by high-pressure liquid.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention
For example, as shown in the following illustrated embodiment, the nozzle assembly 11 of the liquid urging device has a cylindrical escape hole 17c that penetrates the inside and outside, and has one end side like a handpiece 10 on the apparatus body side. Fitting 17 that fits liquid tightly into
And a flow passage 17b in the fitting member 17 is formed through a small through hole 1
An opening / closing member 19 communicating with 9a and movably provided in the fitting member 17;
A sealing member 20 for sealing the gap, a nozzle member 18 for screwing a base end to the other end side of the fitting member 17, and a nozzle member 18 provided between the nozzle member 18 and the opening / closing member 19;
When the pressure inside 7 becomes equal to or more than a certain value, the pressure can be moved to an open position communicating the flow path 17b and the escape hole 17c,
The opening / closing member 19 is moved to a closed position for closing the escape hole 17c.
And a spring member 21 for biasing the spring.

[0008]

According to the present invention, when the liquid is urged, the liquid flowing into the fitting member 17 through the connecting portion is discharged from the nozzle member 18 through the small through hole 19a. At this time, when the pressure in the fitting member 17 becomes equal to or higher than a predetermined value, the opening / closing member 19 is moved to the open position against the spring member 21 and the flow path 1 is moved.
7b communicates with the escape hole 17c.
The maximum discharge pressure is regulated by letting part of the liquid out of the chamber.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a nozzle assembly according to an embodiment of the present invention connected to a handpiece of an oral hygiene apparatus. The oral hygiene device includes a device main body not shown,
The nozzle assembly 11 is connected to a handpiece (connecting portion) 10 on the apparatus body side. The main body of the apparatus has a built-in tank for storing a liquid, a pump for energizing the liquid, and the like, and a longitudinal tube 1 connected to one end of the pump with a liquid discharge side.
2 is connected to the handpiece 10 at the other end. The handpiece 10 has a tubular shape that can be gripped by one hand, and has a large-diameter portion 10a that is open upward in the figure at the tip as shown in FIG. Further, a discharge passage 10b communicating with the tube 12 is provided inside.

[0010] As shown in FIG.
It comprises a fitting member 17 and a nozzle member 18 connected to the fitting member 17. The fitting member 17 has a cylindrical shape as a whole as shown in FIG.
The large diameter portion 17a is formed by enlarging the other end side with respect to the side.
Then, a flow path 17b is formed inside, and a relief hole 17c penetrating the inside and outside of the large diameter portion 17a is formed.
Further, a flange portion 17d is provided on the outer circumference of the other end, and a screw portion 17e is provided on the inner circumference side. Thus, the large diameter portion 17
The opening / closing member 19 is movably fitted in the depth direction of the flow path 17b. The opening / closing member 19 has a circular shape, and has a small through hole 19a at the center thereof, and communicates both ends of the flow path 17b through the through hole 19a. Further, an annular concave portion 19b is formed on the outer peripheral surface, and a ring-shaped seal member 20 is fitted to the annular concave portion 19b. And
In the large diameter portion 17a, a spring member 21 is arranged above the opening / closing member 19 in the drawing.

On the other hand, the nozzle member 18 has a discharge port 18a at the distal end as shown in FIG. 2 and an inflow port 18b at the base end as shown in FIG. 1, and is provided between the discharge port 18a and the inflow port 18b. The discharge path 18c is formed. A screw portion 18d is provided on the outer periphery of the base end.

Then, the base end of the nozzle member 18 is screwed into the other end side of the fitting member 17 at an appropriate depth to form the nozzle assembly 1.
1. Then, the spring member 21 is compressed at the base end of the nozzle member 18 and urged by the spring member 21 to push the opening / closing member 19 to the closed position shown in FIG.
To close the escape hole 17c. Thus, the sealing member 20 seals between the opening / closing member 19 and the fitting member 17 in a liquid-tight manner.

As shown in FIG. 1, one end of the fitting member 17 of the nozzle assembly 11 is fitted into the handpiece 10. Thus, the space between the fitting member 17 and the handpiece 10 is maintained in a liquid-tight manner via the waterproof O-ring 25.

When the above-mentioned oral hygiene apparatus is used, the nozzle member 18 is directed toward the oral cavity by holding the handpiece 10 by hand, and the pump is operated to urge the liquid in the tank by suction. Through the tube 12
0b, and from its discharge path 10b through a flow path 17b,
Further, it passes through the through hole 19a, flows out of the inlet 18b of the nozzle member 18 into the discharge path 18c, and is discharged from the discharge port 18a into the oral cavity through the discharge path 18c.

In this use, when the pressure in the flow path 17b at one end of the fitting member 17 becomes higher than a predetermined value, the opening / closing member 19 is moved upward in FIG. It pushes and moves to the open position, opens the escape hole 17c, communicates with the flow path 17b, and releases a part of the liquid passing through the flow path 17b to the outside through the escape hole 17c. Thus, the maximum discharge pressure of the liquid is regulated. Thereafter, the opening / closing member 19 is returned to the closed position by the spring member 21 again.

Further, in this oral hygiene apparatus, when adjusting the maximum discharge pressure, the nozzle member 18 is rotated in an appropriate direction with respect to the fitting member 17 to change the screwing depth, and the spring member 21 is opened and closed. The urging force on the member 19 is adjusted to an appropriate strength.

[0017]

Therefore, according to the present invention, when the pressure in the fitting member becomes higher than a certain value at the time of energizing the liquid, the opening / closing member is moved to the open position against the spring member, and the liquid is released from the escape hole. Since the maximum discharge pressure is regulated by releasing part of the liquid, it is possible to prevent the liquid from being discharged at a high pressure exceeding a certain level even if the pressure is adjusted incorrectly, and to prevent the nozzle from being clogged by the high pressure liquid. it can. Further, the maximum discharge pressure of the liquid can be easily adjusted only by adjusting the urging force of the spring member without modifying the pump or the like as in the related art.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of a nozzle assembly according to an embodiment of the present invention, which is connected to a handpiece.

FIG. 2 is a configuration diagram showing a part of an oral hygiene device including the nozzle assembly.

FIG. 3 is a cross-sectional view illustrating a structure for adjusting a maximum discharge pressure of a liquid in a conventional oral hygiene device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Handpiece (connection part) 11 Nozzle assembly 17 Fitting member 17b Flow path 17c Escape hole 18 Nozzle member 19 Opening / closing member 19a Small through hole 20 Sealing member 21 Spring member

Claims (1)

(57) [Scope of request for utility model registration] Claims: 1. A tubular escape hole penetrating inside and outside,
A fitting member for fitting one end side into a connection portion of the apparatus body side in a liquid-tight manner, an opening / closing member which communicates a flow path in the fitting member with a small through hole and is movably provided in the fitting member; A sealing member for sealing between the opening / closing member and the fitting member, a nozzle member for screwing a base end to the other end side of the fitting member, and a pressure member provided between the nozzle member and the opening / closing member. A spring member that urges the opening / closing member to a closed position that closes the escape hole so that it can move to an open position that communicates the flow path and the escape hole when is greater than or equal to a certain value. A nozzle assembly of a liquid urging device.