JP2000104663A - Small-sized pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a pump more by changing the volume of a diaphragm part for pumping operation. SOLUTION: A worm 21 is rotated by the rotation of an output shaft of a motor 1, and the rotation is transmitted to a worm gear 22A and a gear 22b, and a driving body 24 is vertically moved by an eccentric shaft 23 so as to move a driving unit of a diaphragm main body 10. Volume of the diaphragm part is increased and decreased so as to intake the outside air through an intake valve 18 and discharge from a discharge port 16 through a discharge valve 13a. Since an output shaft 2 of the motor 1 works as a pump, the motor is arranged in nearly parallel with a reciprocating direction of the driving unit 12. With this structure, length of the pump can be remarkably shortened. A case 30 for housing the motor, the gear and the diaphragm is formed by fitting a valve housing 32 to the rectangular structure provided with a cylinder. A compact pump with the simple structure capable of facilitating the assembling and mass production is obtained at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small pump using an improved discharge valve.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing an outline of a conventional small pump, in which 1 is a small DC motor, 2 is an output shaft of the motor 1, 3 is a case attached to the motor 1, 4 is an output shaft. A collar 5 fixed to 2, a drive shaft 5 inclined and fixed to the collar 4, a drive body 6 having a cylindrical support 7, which is mounted by inserting the drive shaft 5 into the support 7. Have been. 8 is another case (cylinder part) fixed on top of case 3 by overlapping with this
Reference numeral 10 denotes a diaphragm body made of soft rubber, and a bell-shaped diaphragm portion 11 is disposed at a position corresponding to the position of the hole (cylinder) 9 of the case 8. A drive section 12 is formed in the diaphragm section 11 of the diaphragm main body 10, and the tip of the drive section 12 is fixed to the drive body 6. 13 is a cylindrical valve body 13a extending upward from the center of the diaphragm main body 10 in the figure.
The discharge valve 15 has a valve body (valve housing) having a valve chamber portion 14 extending upward from the center thereof in the drawing. The diaphragm 13 is clamped with the portion 13 a in close contact with the case 8 and fixed to the case 8.

The small pump as described above rotates the curler 4 via the output shaft 2 by driving the small DC motor 1 to cause the drive shaft 5 to perform a pebble-like motion. The drive unit 6 alternately moves up and down via the support unit 7 by the movement of. That is, as shown in FIG. 3, the driving body 6 sequentially changes from a state in which the right side is raised, a state in which the left side is raised and the right side is lowered, and further a state shown in FIG. Thereby, the driving unit 1 of the diaphragm 10
2 also moves up and down, and the volume of the bell-shaped diaphragm portion 12 also changes.

[0004] By the movement of the diaphragm portion 12, external air is sucked through the intake hole 17, and the ventilation groove 1 is drawn.
It is fed into the valve chamber through the valve 4a and the valve 13, and functions as a delivery pump from the discharge port 16. That is, the discharge valve 13 which is in close contact with the valve chamber 14 and closes the ventilation groove 14 is opened, and air flows to the discharge port.

[0005]

However, it has been difficult to further reduce the size of a small pump using the diaphragm.
In particular, it has been difficult to shorten the length along the output shaft, including the motor.

The present invention provides a small pump (diaphragm pump) in which the size of the entire pump including the motor is further reduced.

[0007]

The miniature pump of the present invention comprises:
A diaphragm body having a bell-shaped diaphragm portion,
A discharge valve having a cylindrical valve body integrally formed with the diaphragm main body, an intake hole provided at a position leading to the diaphragm, and a driving body that drives the diaphragm to perform a pump action. A motor for moving the driving body, the output shaft of the motor is substantially parallel to the driving direction of the diaphragm, disposed opposite to the discharge port, the output shaft of the motor and the driving body The pump is connected by a gear and an eccentric shaft, and the driving body is reciprocated by the rotation of the motor to change the volume of the diaphragm to perform a pumping operation.

That is, in the small pump according to the present invention, the rotation of the motor is reciprocated by the eccentric shaft through various gears to further increase or decrease the volume of the diaphragm. A pump that sucks in the outside air and sends out the gas sucked in from the discharge port by reducing the volume of the diaphragm. The motor moves the diaphragm as described above (the reciprocating direction of the driving body).
By arranging the pump almost in parallel, the size of the pump was reduced, and especially the length including the motor was reduced to facilitate the incorporation of the pump into various products.

Further, as will be described in a later embodiment, the pump can be assembled in a simple structure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a small pump according to the present invention will be described. FIG. 1 shows the configuration of the small pump of the present invention,
In the figure, 1 is a motor, 2 is an output shaft of the motor, 3
1 is a cylinder, 10 is a diaphragm main body, 11 is a bell-shaped diaphragm part, 12 is a driving part, 13 is a discharge valve 13
a, 14 is a valve chamber, 16 is a discharge port, 18
Are intake valves for closing intake holes communicating with the outside, and these have substantially the same function as the conventional small pump shown in FIG.

Further, 21 is a worm, 22A is a form gear, 22B is a gear, 23 is an eccentric shaft, 24 is a driving body,
These are drive mechanisms for transmitting the rotation of the motor 1 to a drive 24 for driving the diaphragm to move the drive of the diaphragm up and down (reciprocate).

The small pump according to the present invention rotates the worm 21 by the rotation of the output shaft of the motor 1 and transmits the worm 21 to the worm gears 22A and 22B.
3. The driving body 24 is moved up and down by the
Is operated to perform the same pumping action as in the conventional example of FIG. That is, outside air is sucked in from the intake valve 18 by increasing or decreasing the volume of the diaphragm portion, and is discharged from the discharge port 16 through the discharge valve 13a.

The small-diameter diaphragm pump of the present invention is constructed by arranging the motor so that the output shaft 2 of the motor is substantially parallel to the direction of reciprocating motion of the drive unit 12 of the diaphragm unit 11 for performing a pump action. Made it possible to significantly reduce the length of Further, as shown in FIG. 2, the whole becomes relatively thin.

The case 30 for accommodating the motor, gears, diaphragm and the like has a simple structure in which a cylinder is provided in a rectangular shape (box shape) and a valve housing 32 is attached.

When a motor or other parts are mounted on the case 30, the motor 1 and the worm gear 21 are disposed on the case 30, the diaphragm main body 10 is disposed so that the diaphragm 11 is located in the cylinder 31, and the gear 30 is further mounted. 2 can be inserted into the case 30 from the right side of FIG. 2 and attached to a shaft 35 provided on the left wall surface of the case 30 in FIG. 2, and then assembled by a method of opening the lid 33 from the right side in FIG. .

The case 30 has a shape that can be easily formed of a synthetic resin. In other words, it is a box shape having a wide opening on the side of the lid 33 (right side in FIG. 2) in FIG.
It has a shape having a cylinder 31 which is a diaphragm mounting hole and a motor mounting hole above FIGS.
Further, a hole for mounting the shaft 35 and the like is formed on the left side of FIG. 2, and molding can be easily performed by using injection molding or another molding method. The mold structure used for molding is relatively simple, which is desirable for cost reduction.

As described above, the small-sized pump of the present invention can have a structure that is easier to assemble than the conventional example, so that mass production is possible and a small-sized pump can be manufactured at a low cost.

[0018]

The miniature pump of the present invention can be made smaller than the conventional example, and the pump can be easily incorporated into various products.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of the present invention.

FIG. 2 is a diagram showing the configuration of the present invention from the side.

FIG. 3 is a diagram showing a configuration of a conventional small pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Output shaft 10 Diaphragm main body 11 Diaphragm part 12 Drive part 21 Worm gear 22A, 22B Gear 23 Eccentric cam 24 Driver

Claims (1)

[Claims] 1. A diaphragm main body having a bell-shaped diaphragm portion, a discharge valve having a cylindrical valve body formed integrally with the diaphragm main body, and an intake hole provided at a position leading to the diaphragm. A driving unit that drives the diaphragm unit to perform a pumping operation, and a motor that moves the driving unit, the output shaft of the motor being substantially parallel to the driving direction of the diaphragm, and opposite to the discharge port. The output shaft of the motor and the driving body are connected by a gear and an eccentric shaft, and the rotation of the motor causes the driving body to reciprocate to change the volume of the diaphragm part to perform a pump action. And a small pump.