JP2000110729A - Compact pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an ordinary small-sized pump even more compact by making motor rotation reciprocate a drive member to vary the volume at a diaphragm so as to perform a pump action. SOLUTION: In this drive mechanism 20, rotation of an output shaft 2 of a motor 1 turns a drive shaft 21 fixed to the output shaft. The drive shaft is fixed aslant with respect to the output shaft 2. A drive member 22 is mounted to the drive shaft 21 in a manner that it can move circularly either forward or backward. Since the drive member moves circularly either forward or backward with respect to the drive shaft, it does not turn even when the drive shaft 21 turns. The inclination of the drive member 22 changes as its inclination direction changes with respect to the output shaft 2 through rotation of the drive shaft 21. When the inclination direction of the drive member 22 changes, a drive portion 12 of each diaphragm fixed to its end moves in a vertical direction to perform a pump action. The distance between a motor mounting surface and the top surface of the drive member can be made small, which allows the dimension of the motor 1 in the output shaft direction to be made smaller, contributing to an even more compact body of the entire mechanism.

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 reduce the length of the diaphragm body in the direction along the reciprocating motion of the drive unit.

The present invention can be made even smaller as compared with a conventional small pump. In particular, the length of the diaphragm body in the vertical direction (reciprocating motion), that is, the length of the motor in the output shaft direction, is reduced. A small pump is provided.

[0007]

The miniature pump of the present invention comprises:
A diaphragm body having a bell-shaped diaphragm portion,
The diaphragm body includes a discharge valve having a cylindrical valve body formed integrally therewith, a discharge port communicating with the discharge valve, an intake hole provided at a position communicating with the diaphragm, and driving the diaphragm unit. A driving mechanism that performs a pumping operation, the driving mechanism includes a driving shaft that is fixed to be inclined with respect to an output shaft of the motor, and a driving body that is rotatably attached to the driving shaft. The driving body is reciprocated by the rotation of the diaphragm to change the volume of the diaphragm to perform a pumping operation.

Further, in the miniature pump according to the present invention, the driving portion for driving the arrangement position of the diaphragm main body and the discharge valve integrally formed with the diaphragm main body so as to apply a pumping action to the diaphragm portion of the diaphragm main body has the output shaft of the motor. It is characterized in that the discharge valve is oriented in the opposite direction and the discharge valve is oriented in the opposite direction so that the discharge port is aligned with the motor and in the opposite direction to its output shaft.

Thus, the length of the motor in the output shaft direction can be further shortened, the size of the entire pump is reduced, and the overall shape is not a shape extending in one direction but a balanced shape. The degree of freedom of assembling into parts using is increased, and assembling becomes easier.

In this case, the direction of the output shaft of the motor means the length direction of the output shaft and the direction of extension thereof, and the direction of the output shaft is the direction in which the output shaft from the motor extends. The direction on the side was the opposite direction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a small pump according to the present invention will be described.

FIG. 1 is a view showing a configuration of a small pump according to a first embodiment of the present invention, wherein 1 is a motor, 2 is a motor 1
Output shaft, 10 is a diaphragm main body, 11 is a diaphragm section, 12 is a drive section, 13 is a discharge valve, 14 is a valve chamber section, 1
5 is a lid (valve housing), 16 is a discharge port, 17 is an intake hole, 18 is an intake valve, which are substantially the same as the conventional small pump shown in FIG.

A drive mechanism 20 has an umbrella shape as a whole, and has a drive shaft 21 fixed to the output shaft 2 of the motor 1 and a drive body 2 rotatably attached to the drive shaft 21.
And 2. In the vicinity of the periphery of the driving body 22 of the driving mechanism 20, the driving units 12 of the respective diaphragms are fixed at predetermined intervals.

Since the drive mechanism 20 is configured as described above, the rotation of the output shaft 2 of the motor 1 causes the rotation of the drive shaft 21 fixed thereto. The drive shaft is fixed to be inclined with respect to the output shaft 2 as shown. The driving body 22 rotatably mounted on the driving shaft 21 rotates with respect to the driving shaft, so that the driving body 22 does not rotate even if the driving shaft 21 rotates. The inclination of the driving body 22 also changes due to the change in the direction, and the driving unit 12 of each diaphragm fixed to the tip moves in the vertical direction due to the change in the inclination direction of the driving body 22. As a result, a pump action is performed in the same manner as in the conventional example shown in FIG.

According to this embodiment, the number of parts can be reduced without using a collar. Further, the distance from the motor mounting surface to the upper surface of the driving body is reduced, the length of the motor in the output shaft direction (vertical direction in the drawing) can be reduced, and the whole can be further reduced in size.

FIG. 2 shows a second embodiment of the present invention. This second embodiment is a diaphragm pump having one pump chamber, with the discharge port facing the opposite side. In this configuration, the length of the diaphragm body in the direction along the direction of the reciprocating movement of the drive unit is further reduced, and the whole is made compact.

In the second embodiment, 1 is a motor, 2 is an output shaft, 10 is a diaphragm body, 11 is a diaphragm section, 12 is a diaphragm drive section, 13 is a discharge valve, 14 is a valve chamber section, and 15 is a valve chamber section. Lid (valve housing),
Reference numeral 16 denotes a discharge port, reference numeral 17 denotes an intake hole, reference numeral 18 denotes an intake valve. These components have different arrangements such as, for example, the arrangement positions of the diaphragm main body 10 and the discharge ports 16 are reversed. It is substantially the same as the pump room.

The drive mechanism 20 includes a drive shaft 25 that is fixed at an angle to the output shaft 2 of the motor 1 and a drive body 26 that is rotatably attached to the drive shaft 25. In this configuration, the drive unit 12 of the diaphragm main body 10 is fixed near the tip of the body 26.

In the pump having such a drive mechanism 20, the rotation of the output shaft 2 of the motor 1 causes the drive shaft 25 to rotate integrally therewith. Since the drive shaft 25 is inclined and fixed to the output shaft 2 as described above, the direction in which the drive shaft 25 inclines differs due to its rotation. Further, the driving body 26 rotatably mounted on the driving shaft 25 does not rotate even when the driving shaft 25 rotates, and the tip of the driving body 26 in the vertical direction in the drawing changes with the inclination direction of the driving shaft 25. As a result, the drive unit 12 of the diaphragm main body 10 fixed to the distal end portion reciprocates in the vertical direction. Due to this reciprocating movement, the volume inside the diaphragm portion 11 changes, and a pump action is performed.

In the pump according to the second embodiment, as shown in FIG. 2, the diaphragm main body 10 has its driving portion 12 above the diaphragm portion 11, that is, the output shaft 2 of the motor 1.
And the diaphragm portion 11 of the diaphragm main body 10 is configured to face downward in the drawing, which is the opposite direction, so that the discharge valve 13 is oriented in the direction opposite to the direction of the motor output shaft from the diaphragm portion 11. In addition, the valve chamber 14 is located in the opposite direction, that is, downward in the drawing. As described above, the opening direction of the valve chamber portion 14 is directed downward in the drawing, and the discharge port 16 is also directed downward.

In the second embodiment, the lid (valve housing) 1 in which the discharge port 16 facing downward is integrated.
5 is further formed integrally with a motor holding portion 15a.

Further, a cylinder section 30 having a cylinder 30a for restricting the diaphragm section 11 from spreading in the horizontal direction in the drawing is mounted at a position shown in the lid (valve housing) 15 as shown.

As described above, in the second embodiment, the lid (valve housing) 15 holding the motor 15 and attaching the diaphragm body integrally including the discharge valve 13 and the like is attached.
By assembling the cylinder part 30 and attaching other parts, the cover 27 can be attached to easily assemble.

In the second embodiment, in addition to the drive mechanism, the direction of the integrated valve main body and the discharge valve is made different from that of the conventional one, so that the conventional discharge port has a motor output. Since the shaft was oriented in the direction in which the shaft was oriented, it was possible to further reduce the length of the output shaft, including the motor, which was large. Further, there is an advantage that the shape of the entire pump including the motor becomes a well-balanced shape, and the pump can be easily attached to various products using the pump.

[0025]

According to the present invention, a more compact pump can be obtained by improving the driving mechanism for driving the diaphragm. Also, as in the second embodiment, a small and well-balanced pump can be obtained by changing the arrangement of the diaphragm body and the discharge valve in addition to the drive mechanism.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

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 13 Discharge valve 14 Valve chamber part 16 Discharge port 20 Drive mechanism 21 Drive shaft 22 Drive 25 Drive shaft 26 Drive

Claims (2)

[Claims] 1. A diaphragm body having a bell-shaped diaphragm portion, a discharge valve having a cylindrical valve body formed integrally with the diaphragm body, a discharge port communicating with the discharge valve, and the diaphragm. A drive shaft configured to drive the diaphragm to perform a pumping operation, wherein the drive mechanism is inclined and fixed to an output shaft of a motor; and A small pump comprising a driving body rotatably attached to the pump, and reciprocating the driving body by rotation of a motor to change a volume of a diaphragm portion to perform a pump action. 2. The integrated diaphragm main body and discharge valve are arranged such that a drive section of the diaphragm main body is on the output shaft side of the motor and the discharge valve faces in a direction opposite to the output shaft. 2. The small pump according to claim 1, wherein the pump is directed in a direction opposite to a direction of an output shaft of the motor.