Diaphragm pump
First Claim
1. A diaphragm pump comprising:
- a motor comprisinga cylindrical yoke,an output shaft projecting from inside the yoke, anda recess formed in an outer circumferential surface of the yoke and including two side surfaces facing each other;
a crank which rotates together with the output shaft of said motor;
a driving member including a driving element which reciprocates in accordance with the rotation of said crank;
a diaphragm which forms a pump chamber which expands and contracts in accordance with the reciprocal motion of said driving element of said driving member;
a suction passage which draws a fluid into said pump chamber;
a discharge passage which discharges the fluid from said pump chamber;
a suction valve formed in said suction passage to regulate a reverse flow of the fluid from said pump chamber to said suction passage;
a discharge valve formed in said discharge passage to regulate a reverse flow of the fluid from said discharge passage to said pump chamber; and
a cylindrical member which holds said diaphragm, includes a first projection which is inserted between the two side surfaces of the recess and engages with the recess of said motor, and is elastically deformable, whereinsaid motor further comprises a permanent magnet attached to an inner surface of said yoke, and a rotor surrounded by said permanent magnet and axially fixed to the output shaft of said motor,the recess forms an abutting portion which locks said permanent magnet in a predetermined position when said permanent magnet is pressed in said yoke, andthe abutting portion is formed by a second projection which projects to an inner side of the yoke by forming said recess on the outer circumferential surface of the yoke.
2 Assignments
0 Petitions
Accused Products
Abstract
A diaphragm pump includes a motor having a recess in an outer circumferential portion, a crank which rotates together with a motor output shaft, a driving member including a driving element which reciprocates in accordance with the crank rotation, and a diaphragm which forms a pump chamber which expands and contracts in accordance with the reciprocating driving element. The pump also includes a suction passage which draws a fluid into the pump chamber, a discharge passage which discharges the fluid, a suction valve formed in the suction passage to regulate a reverse flow of the fluid to the suction passage, a discharge valve formed in the discharge passage to regulate a reverse flow of the fluid to the pump chamber, and an elastically deformable cylindrical member which holds the diaphragm and includes a projection which engages with the recess of the motor.
34 Citations
5 Claims
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1. A diaphragm pump comprising:
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a motor comprising a cylindrical yoke, an output shaft projecting from inside the yoke, and a recess formed in an outer circumferential surface of the yoke and including two side surfaces facing each other; a crank which rotates together with the output shaft of said motor; a driving member including a driving element which reciprocates in accordance with the rotation of said crank; a diaphragm which forms a pump chamber which expands and contracts in accordance with the reciprocal motion of said driving element of said driving member; a suction passage which draws a fluid into said pump chamber; a discharge passage which discharges the fluid from said pump chamber; a suction valve formed in said suction passage to regulate a reverse flow of the fluid from said pump chamber to said suction passage; a discharge valve formed in said discharge passage to regulate a reverse flow of the fluid from said discharge passage to said pump chamber; and a cylindrical member which holds said diaphragm, includes a first projection which is inserted between the two side surfaces of the recess and engages with the recess of said motor, and is elastically deformable, wherein said motor further comprises a permanent magnet attached to an inner surface of said yoke, and a rotor surrounded by said permanent magnet and axially fixed to the output shaft of said motor, the recess forms an abutting portion which locks said permanent magnet in a predetermined position when said permanent magnet is pressed in said yoke, and the abutting portion is formed by a second projection which projects to an inner side of the yoke by forming said recess on the outer circumferential surface of the yoke. - View Dependent Claims (2, 3, 4, 5)
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Specification