JPH0220473Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a diaphragm pump device.

A structure for fixing a motor to a motor housing in a conventional diaphragm pump device is shown in FIGS. 1 to 3. That is, a notch opening 13 is provided on one side of the cylindrical motor storage portion 2, and opposing protrusions 14 are provided protruding along both sides of the notch opening 13. The outer side of this protrusion 14 is inclined inward and serves as a locking portion 15 for the motor fixing spring 6. The motor 4 has a substantially cylindrical shape, and a recess 12 that is open on the outer periphery of the motor 4 is carved on one side of the motor 4. This motor 4 is housed in the motor housing 2, and a motor fixing spring 6
It is fixed to the motor storage part 2 at. This motor fixing spring 6 has a substantially rectangular spring piece 16 with clamping pieces 17 erected on two opposing sides, and the other two opposing sides.
A presser piece 18 having a substantially L-shaped cross section is erected from the center of the side in the same direction as the clamping pieces 17, and each clamping piece 17 is elastically locked to the locking part 15. The motor 4 is fixed to the motor storage portion 2 by elastically contacting each presser piece 18 with the recess 12.
In this way, in the case of the conventional motor, the motor stopping means such as the locking part 15 and the motor fixing spring 6 protrude outside, resulting in an increase in size, and the motor fixing spring 6
There was also the problem of complication.

The present invention has been developed in view of the above points, and its purpose is to provide a diaphragm pump device in which the motor stopper does not protrude outward and the shape of the motor fixing spring can be simplified. It's about doing.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments. In the figure, reference numeral 1 denotes a base made of plastic or the like, and a motor accommodating part 2 is formed on one side of this one base 1, and a diaphragm accommodating part 3 is formed on the other side. The motor storage section 2 is formed into a substantially cylindrical shape with both ends open, and the opening on the side of the diaphragm storage section 3 has a motor locking wall 20 formed on a presser base 19 that presses the peripheral edge of the diaphragm 5.
are placed facing each other. Reference numeral 6 denotes a motor fixing spring 6 which is a rectangular spring plate bent into a wavy shape.
The proximal end portion 7 of 1 is made to hang down, and the wavy portion 11
A locking protrusion 8 is formed upwardly at the tip.

A spring storage recess 9 is formed on the inner peripheral surface of the bottom of the motor storage section 2, and a slit hole 10 is provided at the bottom of the spring storage recess 9 near the diaphragm storage section 3. Locate the motor fixing spring 6 in the spring storage recess 9 and remove the motor fixing spring 6.
The proximal end 7 of is inserted into the slit hole 10. On the other hand, a substantially cylindrical motor 4 is located inside the motor housing 2.
is inserted, and one end of the motor 4 is connected to the motor locking wall 20.
The corrugated portion 11 of the motor fixing spring 6 is brought into elastic contact with the outer periphery of the motor 4, and the locking protrusion 8 is brought into elastic contact with the recess 12 provided on the outer periphery of the motor 4, thereby locking the motor in the axial direction. 4 is now fixed. On the other hand, the diaphragm storage part 3 has an eccentric shaft 2 fixed to a motor shaft 21 protruding from the motor 4.
It is located below 2. This diaphragm storage portion 3 is formed by recessing a recess 23 on the upper surface of the base 1, and a diaphragm body 5a is mounted in this recess 23. The diaphragm main body 5a is fixed by placing a presser base 19 thereon and screwing the presser base 19 onto the base 1 with screws.
A circular hole 24 is bored in the approximate center of the presser foot base 19, and a cylindrical fitting portion 5b formed at the upper end of the diaphragm 5 projects upward from this hole 24. The pump chamber 25 is formed between the diaphragm body 5a and the recess 23, and the pump chamber 25 is formed between the diaphragm body 5a and the depression 23.
The end of the valve 26 serves as an intake valve 26, and the other end serves as an exhaust valve 27. An intake hole 28 passing through the presser foot base 19 is provided above the intake valve 26, and this intake hole 28 communicates with a dustproof filter (not shown). Further, an exhaust hole 29 penetrating through the presser base 19 is provided above the exhaust valve 27, and the exhaust hole 29 communicates with an exhaust pipe 30 that projects upward. An exhaust hose (not shown) is fitted into the exhaust pipe 30. The motor 4 and the diaphragm 5 are connected by fitting an eccentric shaft 22 fixed to a motor shaft 21 into a bearing hole 31 provided in a fitting portion 5b of the diaphragm 5. To assemble such a diaphragm pump device, first, the diaphragm 5 having a bearing hole 31, an intake valve 26, and an exhaust valve 29 is housed in the diaphragm storage part 3, and the diaphragm 5 has an intake hole 28, an exhaust hole 29, and an exhaust pipe 30 for fixing a hose. The diaphragm 5 is held between the presser base 19 and fixed with screws. On the other hand, an eccentric shaft 22 is fixed to the motor shaft 21 by screwing or press fitting, and the eccentric shaft 22 is fixed to the bearing hole 21.
1, the motor 4 is stored in the motor storage part 2 and fixed with a motor fixing spring 6. The rotational force of the motor 4 is transmitted to the eccentric shaft 22, and the fitting portion 5b of the diaphragm 5 moves with the eccentric movement of the eccentric shaft 22, and the intake valve 26 is deformed accordingly to remove air. is sucked into the pump chamber 25, and then the exhaust valve 27 is deformed to exhaust the air in the pump chamber 25 through the hose.

As described above, in the present invention, a motor locking wall formed on a presser foot base that presses the peripheral edge of the diaphragm is placed facing the opening on the side of the diaphragm housing of the motor housing that is approximately cylindrical and has both ends open. The proximal end of the worn-out motor fixing spring is made to hang down, and the tip of the motor fixing spring is directed upward to form a locking protrusion, and a spring accommodation recess is formed on the inner peripheral surface of the bottom of the motor accommodation part. A slit hole is provided in the bottom of the motor housing, the motor fixing spring is positioned in the spring storage recess, the base end of the motor fixing spring is inserted into the slit hole, and the approximately cylindrical motor is inserted into the motor housing and one end is inserted. is locked in the axial direction by the motor locking wall, and the wavy part of the motor fixing spring is in elastic contact with the motor outer periphery, and the locking protrusion is in elastic contact with the recess provided on the motor outer periphery, so that the motor fixing spring can be stored as a spring. The spring fits into the recess and comes into elastic contact with the motor from within the spring storage recess to prevent the motor from rattling within the motor storage, and also locks the motor in the axial direction to prevent the motor from coming off. Furthermore, the rotation of the motor itself in the motor housing can be prevented by the locking protrusion of the motor fixing spring, and the motor stopper does not protrude outward, allowing for size reduction. Moreover, since the motor fixing spring is wavy and only needs to have its base end hanging down and a locking protrusion at its tip, it is only necessary to bend a rectangular spring plate.
This has the effect of facilitating manufacturing and simplifying the shape.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional motor fixing spring, Fig. 2 is a perspective view showing how the above motor is installed, Fig. 3 is a sectional view of the above, and Fig. 4 is an exploded perspective view of the embodiment of the present invention. Figure 5 is a side view of the same as above, Figure 6 is a front sectional view of the same, and Figure 7 is a cutaway side view of the same. , 4 is the motor, 5 is the diaphragm, 6
is a motor fixing spring, 7 is a base end of the motor fixing spring, 8 is a locking protrusion, 9 is a spring storage recess, 10 is a slit hole, 11 is a wavy part, 12 is a recess, 19 is a presser foot base, 20 is a This is a motor locking wall.

Claims (1)

[Scope of utility model registration request] A diaphragm pump device in which a motor housing part and a diaphragm housing part are formed in one base, and the motor and the diaphragm are connected by storing the motor and the diaphragm in the motor housing part and the diaphragm housing part, respectively, and having a substantially cylindrical shape. A motor locking wall formed on a presser foot base that presses the peripheral edge of the diaphragm is placed facing the opening on the diaphragm housing side of the motor housing that is open at both ends, and the base end of the wavy motor fixing spring is suspended. At the same time, a locking protrusion is formed with the tip of the motor fixing spring facing upward, a spring storage recess is formed on the inner peripheral surface of the bottom of the motor storage part, and a slit hole is provided in the bottom of the spring storage recess, so that the motor fixing spring can be attached to the motor fixing spring. into the spring housing recess, insert the base end of the motor fixing spring into the slit hole, insert the approximately cylindrical motor into the motor housing, and lock one end in the axial direction with the motor locking wall. A diaphragm pump device comprising a wavy portion of a motor fixing spring in elastic contact with the outer periphery of the motor, and a locking protrusion in elastic contact with a recess provided in the outer periphery of the motor.