JPH0570521U - Oral hygiene pump device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a pump device, the pressure can be adjusted so that the discharge pressure of the liquid gradually changes substantially in proportion to the rotation angle of the adjusting member without making the structure complicated. [Structure] An adjustment member storage chamber 25 that communicates with a cylinder chamber 24 via an adjustment port 33 is formed.
The adjusting member 36 is housed in the unit 5. Then, while the flow path inlet 35a of the return passage 35 is provided on the inner surface of the cylinder of the adjusting member storage chamber 25, the circumferential groove 36e is provided on the outer surface of the cylinder of the adjusting member 36 so as to be inclined with respect to the axis line. Store the packing 37 in. Then, when adjusting the discharge pressure of the liquid, by rotating the adjusting member 36, the packing 37 is moved to an appropriate position crossing the flow path inlet 35a to adjust the opening degree of the flow path inlet 35a. Accordingly, a part of the liquid in the cylinder chamber 24 is supplied from the adjustment port 33 to the adjustment member storage chamber 2
Return to the return path 35 through 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention can be applied to an oral hygiene device for urging a liquid with a pump and ejecting the liquid from a nozzle toward the inside of the mouth to clean the inside of the mouth and massage the gums. Specifically, in such an oral hygiene device, a pump device that operates by a motor to inhale and energize tap water from a tap and water / chemical liquid stored in a tank, and discharge the liquid to a nozzle. Regarding

[0002]

[Prior Art]

 Conventionally, in this type of pump device, when operating, the piston reciprocates in the cylinder chamber, so that liquid such as tap water or chemical liquid is sucked into the cylinder chamber from the suction port, and the sucked liquid is urged. It was discharged to the nozzle through the discharge port.

Further, in this conventional pump device, an adjusting port is provided in the cylinder chamber, and a pressure adjusting valve is provided in the adjusting port. Then, the pressure adjusting valve is moved by rotating the adjusting member so that the opening degree of the adjusting port can be adjusted. Then, at the time of operation, the adjustment member is appropriately rotated to adjust the degree of opening of the adjusting port, and according to the degree of opening, a part of the liquid in the cylinder chamber is returned to the reflux passage through the adjusting port, The ejection pressure of the ejected liquid was adjusted.

[0004]

[Problems to be solved by the device]

 However, with this conventional pump device, it was difficult to adjust the pressure so that the discharge pressure of the liquid gradually changes substantially in proportion to the rotation angle of the adjusting member. Further, there has been a problem that the structure becomes considerably complicated to enable such fine adjustment of the discharge pressure.

Therefore, an object of the present invention is to gradually change the discharge pressure of the liquid in the pump device for the oral hygiene device as described above, substantially in proportion to the rotation angle of the adjusting member without complicating the structure. The pressure is adjustable so that

[0006]

[Means for Solving the Problems]

 Therefore, according to the first aspect of the present invention, for example, as shown in the following illustrated embodiment, the piston 29 is reciprocated and the liquid sucked into the cylinder chamber 24 from the suction port 27a is discharged from the discharge port 28. At this time, by rotating the adjusting member 36, a part of the liquid in the cylinder chamber 24 is returned from the adjusting port 33 through the adjusting member storage chamber 25 to the reflux path 35. Adjusting member The peripheral surface of the accommodating chamber 25 is an inner surface of a cylinder, and the inner surface of the cylindrical member is provided with the flow path inlet 35a of the return passage 35, while the inner surface of the adjusting member 36 accommodated in the adjusting member accommodating chamber 25 is a cylinder. An outer surface is provided with a circumferential groove 36e on the outer surface of the cylinder at an angle θ with respect to the axis L, and the adjustment hole 33 and the flow path inlet 35a are cut off and communicated with each other in the circumferential groove 36e. Characterized by comprising housing the packing 37.

According to a second aspect of the present invention, for example, as shown in the following illustrated embodiments, in the pump device 12 according to the first aspect, the flow passage inlet 35a is elongated in the direction of the axis L of the inner surface of the cylinder. It is characterized by being formed.

According to a third aspect of the present invention, for example, as shown in the following illustrated embodiment, in the pump device 12 according to the first aspect, the adjusting member 36 is retracted due to a sudden increase in pressure in the cylinder chamber 24. The adjusting member 36 is biased in the direction of the axis L so that the adjusting port 33 and the flow path inlet 35a can be largely communicated with each other.

[0009]

[Action]

 Then, when the pump device is operated, the piston 29 is reciprocated to discharge the liquid sucked into the cylinder chamber 24 through the suction port 27a through the discharge port 28. Then, when adjusting the discharge pressure of the liquid, the packing 37 is rotated to move the position across the flow path inlet 35a by rotating the adjusting member 36, and the opening degree of the flow path inlet 35a is adjusted. Depending on the degree of opening, a part of the liquid in the cylinder chamber 24 is returned from the adjustment port 33 to the return passage 35 through the adjustment member storage chamber 25. Then, the return amount of the liquid is changed to adjust the discharge pressure of the liquid.

According to the second aspect, when adjusting the discharge pressure of the liquid, the packing 37 is rotated by the adjusting member 36 to move the position across the flow path inlet 35a to open the flow path inlet 35a. Adjust.

According to the third aspect, when the pump device 12 is operating, for example, when the discharge port of the nozzle is blocked and the pressure in the cylinder chamber 24 suddenly rises, the pressure causes the adjustment member 36 to be urged. And retreat in opposition to wide open the flow path inlet 35a.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows an overall schematic configuration of an oral sanitary ware directly connected to a water supply equipped with a pump device according to an embodiment of the present invention. Reference numeral 10 in the drawing is a container body of the oral hygiene device. A motor 11 and a pump device 12 of the present invention driven by a motor 11 are provided in the main body 10. The motor 11 is connected to an external power source via the power cord 13. The pump device 12 has a suction side connected to the tap 15 through the water supply tube 14 and a discharge side connected to the handpiece 17 through the drainage tube 16. A nozzle 18 is replaceably attached to the tip of the handpiece 17.

When using this oral hygiene device, first, turn the handle 20 to open the faucet 15, hold the handpiece 17 with one hand, and direct the tip of the nozzle 18 into the oral cavity. The power of the main body 10 is turned on, the motor 11 is driven, and the pump device 12 is operated. Then, tap water from the faucet 15 is sucked through the water supply tube 14, the sucked tap water is urged, and is sprayed from the nozzle 18 into the oral cavity through the drainage tube 16. Then, the inside of the mouth is cleaned and gums are massaged. After use, the handle 20 is returned and the faucet 15 is closed. Then, after draining all the tap water remaining in the main body 10, the power is turned off.

By the way, the pump device 12 described above includes a main body case 23 as shown in detail in FIG. The main body case 23 forms a vertically long cylinder chamber 24 and an adjustment member storage chamber 25 that open in the vertical direction in the figure. Further, a valve storage chamber 26 is formed on the left side of the cylinder chamber 24 in the drawing, and an intake passage 27 that communicates with the valve storage chamber 26 via the intake port 27a is formed. Further, a discharge port 28 is formed on the side opposite to the suction port 27a with the valve storage chamber 26 and the cylinder chamber 24 interposed therebetween.

A piston 29 is provided in the cylinder chamber 24 so as to be reciprocally movable. The valve storage chamber 26 has a valve holding portion 23a on the cylinder chamber 24 side, and the check valve 30 is movably held by the valve holding portion 23a. An urging spring 31 is arranged in the valve storage chamber 26, and the urging spring 31 constantly urges the check valve 30 to press the valve tip 30a against the suction port 27a to close the suction passage 27. It consists of

In the adjustment member storage chamber 25, an adjustment port 33 is provided between the cylinder chambers 24 on the upper side in the figure, and a storage port 34 is provided on the lower side. Then, the storage opening 34 is formed to have an enlarged diameter and the step portion 25a is provided. Further, the adjusting member storage chamber 25 has a cylindrical inner surface, and a flow path inlet 35a is provided near the adjusting port 33 on the left side in the figure of the inner surface of the cylinder. As shown in FIG. 2, the flow path inlet 35a is formed in a slender shape in the axial direction (vertical direction in FIG. 1) of the inner surface of the cylinder. Then, as shown in FIG. 1, an L-shaped return passage 35 is formed between the passage inlet 35 a and the suction passage 27.

The adjusting member 36 is rotatably housed in the adjusting member housing chamber 25. As shown in FIGS. 1 and 3, the adjusting member 36 has a cylindrical expanded diameter portion 36b and a small diameter portion 36c slightly smaller than the expanded diameter portion 36b on the tip side of the shaft portion 36a. The peripheral surface of the small diameter portion 36c is a cylindrical outer surface. A circumferential groove 36d is provided on the cylindrical outer surface of the expanded diameter portion 36b, and a circumferential groove 36e is provided on the cylindrical outer surface of the small diameter portion 36c. The one circumferential groove 36e is provided at an angle θ with respect to the axis L. Further, a flange 36f is provided on the side of the shaft 36a of the circumferential groove 36d. The packing 37 is housed in one circumferential groove 36e, and the packing 38 is housed in the other circumferential groove 36d. Further, a biasing spring 39 is arranged in the storage opening 34, the storage opening 34 is covered with a lid 40 to close the storage opening 34, and the biasing spring 39 pushes the flange portion 36f against the step portion 25a. The packing 37 liquid-tightly shuts off between the adjusting port 33 and the flow path inlet 35a. The outer cylindrical surface of the expanded diameter portion 36b and the inner cylindrical surface of the adjusting member storage chamber 25 are liquid-tightly held by a packing 38.

Therefore, in the above-described pump device 12, when the pump device 12 is operated, the piston 29 is reciprocated up and down in FIG. 1 by the motor 11, and the check valve 30 is first pushed open to open the tap water from the faucet 15. While sucking water into the cylinder chamber 24 through the suction passage 27, the check valve 30 is closed and the sucked tap water is discharged from the discharge port 28 to the nozzle 18. At this time, the pressure of the tap water discharged from the nozzle 18 is adjusted if necessary.

However, when the pressure is adjusted, the packing 37 is rotated by appropriately rotating the adjusting member 36. Then, as shown in FIG. 2, the position at which the packing 37 crosses the flow path inlet 35a is moved as shown by a chain line, and the opening degree of the flow path inlet 35a is finely adjusted. Then, according to the opening degree, a part of tap water in the cylinder chamber 24 escapes from the adjusting port 33 to the flow path inlet 35a through the adjusting member storage chamber 25, and further, from the flow path inlet 35a to the return path 35. And put it back. In this way, the turning angle of the adjusting member 36 is adjusted, and the discharge pressure of tap water is gradually changed substantially in proportion to the turning angle.

In addition, when the discharge port of the nozzle 18 is blocked and the pressure in the cylinder chamber 24 suddenly rises during the operation of the pump device 12 described above, the pressure causes the adjustment member 36 to urge the biasing spring 39. 1 is retracted (moved downward in FIG. 1) against the urging force to open the flow path inlet 35a widely, and the tap water is returned from the adjustment opening 33 to the return path 35. Then, it is possible to prevent troubles such as a failure from occurring due to such a rapid pressure increase.

[0021]

Therefore, according to the present invention, a circumferential groove is provided obliquely on the cylindrical outer surface of the adjusting member to be accommodated in the adjusting member accommodating chamber of the pump device, and the packing is accommodated in the circumferential groove. When the flow path inlet of the return path is provided on the inner surface of the cylinder of the adjusting member storage chamber and the liquid discharge pressure is adjusted, the packing is moved and adjusted by rotating the adjusting member appropriately so as to cross the flow path inlet. Depending on the adjustment, a part of the liquid in the cylinder chamber is returned from the adjustment port to the return path through the adjustment member storage chamber, so that the rotation angle of the adjustment member can be adjusted without making the structure complicated as in the past. The pressure can be adjusted so that the discharge pressure of the liquid gradually changes substantially in proportion.

According to the second aspect, since the flow path inlet is formed in a slender shape in the axial direction of the inner surface of the cylinder of the adjustment member storage chamber, it is more accurately proportional to the rotation angle of the adjustment member. Then, the discharge pressure of the liquid can be adjusted.

According to the third aspect, when the pressure in the cylinder chamber suddenly rises during the operation of the pump device, the sudden rise causes the adjusting member to withdraw against the urging force to enlarge the flow path inlet. Since it opens, it is possible to prevent a trouble such as a failure from occurring due to such a rapid pressure increase.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pump device according to an embodiment of the present invention.

FIG. 2 is a line AA in FIG. 1 showing a flow path inlet of the pump device.
FIG.

FIG. 3 is a shape explanatory view of an adjusting member of the pump device.

FIG. 4 is an overall schematic explanatory view of an oral hygiene device including the pump device.

[Explanation of symbols]

 12 Pump Device 24 Cylinder Chamber 25 Adjustment Member Storage Chamber 27a Suction Port 28 Discharge Port 29 Piston 33 Adjustment Port 35a Flow Path Inlet 36 Adjustment Member 36e Circumferential Groove 37 Packing

Claims (3)

[Scope of utility model registration request] 1. The piston reciprocates to discharge the liquid sucked into the cylinder chamber from the suction port from the discharge port, and at the same time, by rotating the adjusting member, a part of the liquid in the cylinder chamber is discharged from the adjusting port. In a pump device for an oral hygiene device that returns to the reflux passage through the adjustment member storage chamber, the peripheral surface of the adjustment member storage chamber is a cylinder inner surface, and the flow passage inlet of the reflux passage is provided on the cylinder inner surface while the adjustment member storage is provided. The outer peripheral surface of the adjusting member housed in the room is a cylindrical outer surface,
A pump device for an oral hygiene device, wherein a circumferential groove is provided on the outer surface of the cylinder so as to be inclined with respect to the axis, and a packing for blocking and communicating between the adjusting port and the flow path inlet is housed in the circumferential groove. .. 2. The pump device for an oral hygiene device according to claim 1, wherein the flow path inlet is elongated in the axial direction of the inner surface of the cylinder. 3. The adjustment member is urged in the axial direction so that the adjustment member retracts due to a sudden increase in pressure in the cylinder chamber and the communication between the adjustment port and the flow path inlet can be largely communicated. 1. A pump device for an oral hygiene device according to 1.