JP2010007605A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump capable of surely opening and closing a valve element (especially keeping a closed state) and maintaining a high pump efficiency state for a long period of time. <P>SOLUTION: The pump 1 includes a housing 2 of which the inside is divided into a pump chamber 21, a suction chamber 23, a discharge chamber 24, a first valve element storage chamber 22a, and a second valve element storage chamber 22b, and which has a first suction passage 25 providing communication between a suction chamber 23 and a first valve element storage chamber 22a and a first discharge passage 27 providing communication between the pump chamber 21 and the second valve element storage chamber 22a; a first valve element 3a stored in the first valve element storage chamber 22a; and a second valve element 3b stored in the second valve element storage chamber 22b. The first valve element 3a deforms in such a manner that an outer circumference 32 thereof can open and close the first suction passage 25 in a state that the first valve element 3a is press-bonded on an inner surface of the first valve element storage chamber 22a, and the second valve element deforms in such a manner that an outer circumference 32 thereof can open and close the first discharge passage 27 in a state that the second valve element is press-bonded on an inner surface of the second valve element storage chamber 22b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pump.

  When a fluid such as liquid or gas is transferred, a pump can be installed in the middle of the flow path through which the fluid passes, and the liquid can be transferred by operating this pump.

  Conventionally, as this pump, a housing having a pump chamber whose volume increases or decreases, a tubular suction port communicating with the pump chamber and sucking fluid into the pump chamber, and a fluid flowing into the pump chamber are discharged. There is known a tubular discharge port, and a valve body that is installed in each of the suction port and the discharge port and opens and closes the corresponding port (see, for example, Patent Document 1). In the pump described in Patent Document 1, when the volume of the pump chamber is reduced, the valve body on the suction port side is closed, the valve body on the discharge port side is opened, and the fluid is discharged from the discharge port. When the volume of the pump chamber increases, the pressure in the pump chamber decreases, the valve body on the discharge port side closes, the valve body on the suction port side opens, and fluid flows in from the suction port.

  The pump described in Patent Document 1 is configured by an elastic body in which each valve body has a plate shape. The valve body is cantilevered on the inner wall of the corresponding port. For this reason, the valve body is likely to bend, and deterioration with time (sagging (elongation)) due to pressing of the fluid passing through the port is likely to occur. As a result, there is a problem that the valve body is not reliably opened and closed (particularly, the closed state is not maintained), and the pump efficiency is lowered.

JP 2006-207436 A

  An object of the present invention is to provide a pump in which a valve body can be reliably opened and closed (particularly, a closed state is maintained) and a pump efficiency can be maintained for a long time.

Such an object is achieved by the present inventions (1) to (19) below.
(1) A first valve body whose interior is located between a pump chamber whose volume can be increased or decreased, a suction chamber into which fluid is sucked, a discharge chamber for discharging fluid, and the pump chamber and the suction chamber. A first chamber that is partitioned into a storage chamber and a second valve body storage chamber located between the pump chamber and the discharge chamber, and that communicates the suction chamber and the first valve body storage chamber; A suction path, a second suction path that connects the first valve body storage chamber and the pump chamber, a first discharge path that connects the pump chamber and the second valve body storage chamber, A housing provided with a second discharge passage communicating the second valve body storage chamber and the discharge chamber;
A first valve body, which is housed in the first valve body storage chamber and is made of an elastic body and has a disk shape;
A second valve body, which is housed in the second valve body storage chamber and is made of an elastic body and has a disk shape;
Volume increasing / decreasing means for increasing / decreasing the volume of the pump chamber,
The first valve body storage chamber is formed with a first support portion projectingly formed by crimping the center portion of the first valve body to the inner surface thereof, and supporting the first valve body,
In the second valve body storage chamber, a center part of the second valve body is pressure-bonded to the inner surface thereof, and a second support part for supporting the second valve body is formed to protrude,
The first valve body is capable of opening and closing the first suction passage at least a part of an outer peripheral portion thereof in a state in which the first valve body is crimped to the inner surface of the first valve body storage chamber by the first support portion. Deformed,
The second valve body is capable of opening and closing the first discharge passage at least a part of the outer peripheral portion in a state where the second valve body is crimped to the inner surface of the second valve body storage chamber by the second support portion. A pump configured to be deformed.

  (2) The pump according to (1), wherein at least one of the first support portion and the second support portion has a support surface configured by a curved projecting surface.

  (3) The pump according to (2), wherein the support surface of the first support portion has a function of restricting a deformation limit when the first valve body opens the first suction path.

  (4) In the above (2) or (3), the support surface of the second support portion has a function of regulating a deformation limit when the second valve body opens the first discharge path. The pump described.

(5) The first valve body storage chamber and the second valve body storage chamber are arranged side by side,
The pump according to (1) or (2), wherein the first support portion and the second support portion protrude in opposite directions.

  (6) The first valve body storage chamber is formed with a first protrusion that protrudes in a direction opposite to the first support part, which warps the entire outer periphery of the first valve body. The pump according to any one of (1) to (5) above.

(7) The first suction path is in a position shifted from the center of the first valve body,
In the outer peripheral portion of the first valve body, the degree of warping of the portion on the first suction path side is smaller than the degree of warping of the portion on the opposite side through the center of the first valve body. The pump according to 6).

  (8) The second valve body storage chamber is formed with a second protrusion that protrudes in the opposite direction to the second support part, which warps the entire outer periphery of the second valve body. The pump according to any one of (1) to (7) above.

(9) The first discharge path is in a position shifted from the center of the second valve body,
In the outer peripheral portion of the second valve body, the degree of warping of the portion on the first discharge path side is smaller than the degree of warping of the opposite side portion through the center of the second valve body ( The pump according to 8).

  (10) The pump according to any one of (1) to (9), wherein at least one of the first suction path and the second discharge path is configured by an arcuate hole having an arc shape.

  (11) The pump according to any one of (1) to (10), wherein at least one of the second suction path and the first discharge path includes a plurality of through holes.

  (12) The pump according to any one of (1) to (11), wherein the first valve body and the second valve body have the same size.

  (13) The pump according to any one of (1) to (12), further including first positioning means for positioning the first valve body with respect to the first valve body storage chamber.

  (14) The pump according to any one of (1) to (13), further including second positioning means for positioning the second valve body with respect to the second valve body storage chamber.

  (15) The volume increasing / decreasing means includes a diaphragm that defines a part of the pump chamber and increases or decreases the volume of the pump chamber by deformation, and a drive mechanism that drives the diaphragm so that the diaphragm is deformed. The pump according to any one of (1) to (14) above.

(16) The housing includes a housing body, an outer lid that covers a top side of the housing body, and an inner lid that is interposed between the housing body and the outer lid.
The suction chamber and the discharge chamber are defined by the outer lid and the inner lid, and the first valve body storage chamber and the second valve body storage chamber are formed by the housing body and the inner lid. The pump according to any one of (1) to (15), which is defined.

  (17) The housing may include packings interposed between the housing main body and the inner lid and between the inner lid and the outer lid, respectively. The pump described.

  (18) Any one of the above (1) to (17), wherein the housing has a tubular suction port communicating with the suction chamber and a tubular discharge port communicating with the discharge chamber. Pump according to

  (19) The pump according to (18), wherein the suction port and the discharge port protrude in the same direction.

  According to the present invention, the first valve body is in a state of being crimped to the inner surface of the first valve body storage chamber by the first support portion, so that the outer peripheral portion of the first valve body is surely secured. In addition, the first suction path of the housing can be closed (the first valve body is closed). In this closed state, the flow of fluid from the suction chamber to the pump chamber is reliably interrupted. Further, even when the first valve body deteriorates with time and its elastic force (restoring force) is reduced, the first valve body is in the above-described pressure-bonded state, so that the first The valve body is securely closed. Therefore, it is possible to maintain a high pump efficiency over a long period of time.

  Similarly, the second valve body is in a state of being crimped to the inner surface of the second valve body storage chamber by the second support portion, so that the outer peripheral portion of the second valve body is The first discharge path of the housing can be reliably closed (the second valve body is closed). In this closed state, the flow of fluid from the pump chamber to the discharge chamber is reliably interrupted. Further, even when the second valve body deteriorates with time and its elastic force (restoring force) decreases, the second valve body is in the pressure-bonded state as described above, so that the second The valve body is securely closed. Therefore, it is possible to maintain a high pump efficiency over a long period of time.

Hereinafter, the pump of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
<First Embodiment>
1 is a perspective view showing a first embodiment of the pump of the present invention, FIG. 2 is an exploded perspective view of the pump shown in FIG. 1, FIG. 3 is an enlarged perspective view of an inner lid in FIG. 2, and FIG. 3 is a view (perspective view) of the inner lid shown in FIG. 3 seen from the lower surface side (back side), FIG. 5 is an enlarged perspective view of the top plate in FIG. 2, and FIG. 6 is a side view of the pump shown in FIG. 7 to 9 are cross-sectional views taken along line AA in FIG. 6 (cross-sectional views showing the operating state of the pump shown in FIG. 1 (FIG. 7 shows a stopped state, FIG. 8 shows a fluid suction state, FIG. 9 shows the fluid discharge state)). In the following, for convenience of explanation, the upper side in FIGS. 1 to 3 and 5 to 10 is “upper”, “upper” or “front”, and the lower side is “lower”, “lower” or “back”. The upper side in FIG. 4 is referred to as “lower”, “lower” or “back”, and the lower side is referred to as “upper”, “upper” or “front”.

  A pump 1 shown in FIG. 1 sucks (sucks) a fluid F such as a liquid or a gas and discharges the sucked fluid F. The pump 1 includes a housing 2, a first valve body 3 a and a second valve body 3 b housed in the housing 2, and volume increasing / decreasing means 4 that increases or decreases the volume of the pump chamber 21 in the housing 2. (See FIG. 2). Hereinafter, the configuration of each unit will be described.

  As shown in FIG. 2, the housing 2 includes a housing body 5 and a packing 20 a, an inner lid 6, a packing 20 b, and an outer lid 7 that are sequentially installed on the upper side of the housing body 5. The housing 2 can fix these members by a fixing method such as fitting, press-fitting, caulking, adhesion (adhesion with an adhesive or a solvent), screwing, or the like.

  As shown in FIGS. 7 to 9, due to the above-described components, the inside of the housing 2 is adjacent to the suction chamber 23, the pump chamber 21 whose volume can be increased / decreased, the suction chamber 23 located above the pump chamber 21, and The discharge chamber 24, the first valve body storage chamber 22a located between the pump chamber 21 and the suction chamber 23, and the second valve body storage chamber 22b located between the pump chamber 21 and the discharge chamber 24. It is divided (divided) into five rooms. Further, the suction chamber 23 and the discharge chamber 24 are arranged side by side. Similarly, the first valve body storage chamber 22a and the second valve body storage chamber 22b are also arranged side by side.

  The housing 2 communicates with each other, and the fluid F flows through the suction chamber 23, the first valve body storage chamber 22a, the pump chamber 21, the second valve body storage chamber 22b, and the discharge chamber 24 in this order. It is configured to be able to pass through. In other words, the suction chamber 23 and the first valve body storage chamber 22 a communicate with each other via the first suction path 25. The first valve body storage chamber 22a and the pump chamber 21 communicate with each other via the second suction passage 26. The pump chamber 21 and the second valve body storage chamber 22 b communicate with each other through the first discharge path 27. The second valve body storage chamber 22 b and the discharge chamber 24 communicate with each other via the second discharge path 28.

  The housing body 5 includes a base portion 8, a top plate 9 installed on the upper side of the base portion 8, and a back cover 10 that covers the back side (lower side) of the base portion 8.

  The base portion 8 is a member whose outer shape is a “U” shape, that is, connects the two side walls 81a and 81b that are opposed to each other with a gap 83 therebetween, and the upper ends of the side walls 81a and 81b. And a connecting portion (top portion) 82. Claws 84 that are used when the pump 1 is fixed to, for example, a support base or the like are formed on the right side of each side wall 81a, 81b and connecting portion 82 in FIG. The connecting portion 82 is formed with a through hole 821 that passes through the central portion thereof. As shown in FIGS. 2 and 7 to 9, a shaft portion 412 of a diaphragm 41 of the volume increasing / decreasing means 4 to be described later is inserted (screwed) into the through hole 821. Further, a ring-shaped groove 822 formed concentrically with the through hole 821 is formed in the connecting portion 82 on the outer peripheral side of the through hole 821. The flange portion 413 of the diaphragm 41 is inserted into the groove 822.

  The back cover 10 covers the gap 83 of the base portion 8 and is fixed to the base portion 8. The back cover 10 is a member whose outer shape is an “L” shape, that is, a bottom plate 101 that is the bottom of the housing body 5, and a side wall 102 that stands from the edge of the bottom plate 101. . On the inner side of the side wall 102, a ring-shaped fitting portion 103 into which a bearing 47 of the volume increasing / decreasing means 4 described later is fitted (supported) is formed to project.

  The top plate 9 is a plate member having a quadrangular shape in plan view, and is fixed to the connecting portion 82 of the base portion 8. As shown in FIG. 5 (the same applies to FIGS. 2 and 7 to 9), two upper concave portions 92 a and 92 b are formed on the upper surface 91 of the top plate 9. The upper concave portion 92a constitutes a first valve body housing chamber 22a in which the first valve body 3a made of an elastic material is housed (see FIGS. 7 to 9). The upper concave portion 92b constitutes a second valve body storage chamber 22b in which the second valve body 3b made of an elastic material is stored (see FIGS. 7 to 9).

  As shown in FIG. 7 (the same applies to FIGS. 8 and 9), the upper concave portion 92a (first valve body storage chamber 22a) has a first support portion (support surface) 93 on the bottom portion 921 facing upward. And projecting in a curved state (raised). As shown in FIG. 7, the 1st support part 93 supports the 1st valve body 3a. By the first support portion 93, the vicinity of the center portion 31 of the first valve body 3 a is pressed against the lower surface (wall surface (inner surface)) 61 of the inner lid 6 fixed to the upper surface 91 of the top plate 9. . That is, the vicinity of the central portion 31 of the first valve body 3 a is sandwiched between the first support portion 93 and the lower surface 61 of the inner lid 6. Thereby, the 1st valve body 3a is supported and fixed. Moreover, by being in such a pressure-bonded state, the edge portion (outer peripheral portion) 32 of the first valve body 3a can surely block the first suction path 25 of the housing 2 (first step). The valve body 3a is closed). In this closed state, the flow of the fluid F from the suction chamber 23 to the pump chamber 21 is reliably interrupted. Further, even when the first valve body 3a deteriorates with time and its elastic force (restoring force) decreases, the first valve body 3a is reliably closed by being in a crimped state. Become. Therefore, it is possible to maintain a high pump efficiency over a long period of time.

  Moreover, the 1st support part 93 has comprised the flat shape. The entire circumference of the edge portion 931 of the first support portion 93 is rounded. As shown in FIG. 8, when the edge 32 of the first valve body 3a is warped and the first suction passage 25 is released (the first valve body 3a is opened), the first support portion Since the edge portion 931 of the 93 is rounded, the edge portion 32 of the first valve body 3a can be smoothly (reasonably) deformed (along) along the roundness and warped (deformed). ) Is regulated. When the pump 1 is used, the first valve body 3a is repeatedly warped and restored from the warp (repetitively deformed). However, the first valve body 3a can be deformed as described above. Deterioration can be prevented or suppressed.

  In addition, a pin 932 protrudes upward at a position slightly shifted to the left in FIG. 7 from the center of the first support portion 93. As shown in FIG. 7, the pin 932 is inserted into the positioning hole 33 formed in the central portion 31 of the first valve body 3a. Thereby, the positioning of the first valve body 3a with respect to the first valve body storage chamber 22a (upper concave portion 92a) is reliably performed, so that the central portion 31 of the first valve body 3a is positioned on the lower surface 61 of the inner lid 6. Can be securely crimped. Thus, in the pump 1, the first valve body 3 a is positioned relative to the first valve body storage chamber 22 a by the pin 932 of the first support portion 93 and the positioning hole 33 of the first valve body 3 a. First positioning means is configured. Further, as described above, the pin 932 is disposed at a position shifted from the center portion of the first support portion 93. Thereby, when the first valve body 3a is stored in the first valve body storage chamber 22a, the space (gap) in the first valve body storage chamber 22a is inserted into the right side in FIG. There is a difference in size between the left side and the left side. In the configuration shown in FIG. 7, the space on the left side, that is, the first suction path 25 side is larger than the space on the right side. Thereby, the part (inner side part 321) by the side of the 1st suction path 25 of the edge part 32 of the 1st valve body 3a can fully deform | transform.

  As shown in FIG. 5, two through holes 95 that penetrate the top plate 9 in the thickness direction are formed in the bottom 921 of the upper recess 92 a on the upper recess 92 b side (right side in the drawing). . These through holes 95 function as the second suction path 26. The second suction path 26 is a flow path for transferring the fluid F from the first valve body storage chamber 22a to the pump chamber 21 (see FIG. 8).

  Since the second suction path 26 is configured by the two through holes 95 in this manner, the second suction path 26 is large enough to allow the fluid F to pass through the second suction path 26. It becomes. Thereby, for example, pressure loss in the second suction path 26 can be prevented. Further, even if one of the two through holes 95 is blocked by, for example, a substance (dust or the like) contained in the fluid F, the fluid F is transferred by the other through hole 95. It can be carried out.

  Further, in the configuration shown in FIG. 7, a part of each through-hole 95 is formed over (spans) the first support portion 93. However, the present invention is not limited to this, and the first support portion is not limited thereto. 93 may not be formed.

  Further, the number of through holes 95 formed is not limited to two, and may be one or three or more, for example.

  As shown in FIG. 7, a stepped portion (second projecting portion) 96 is formed on the bottom portion 921 of the upper concave portion 92 b (second valve body housing chamber 22 b). The step portion 96 has a ring shape along the circumferential direction of the upper concave portion 92b. When the second valve body 3b is stored (installed) in the second valve body storage chamber 22b, the edge 32 of the second valve body 3b is lifted (pressed) by the step portion 96, The entire circumference of the edge portion 32 warps (curves and deforms). In this warped state, the edge 32 of the second valve body 3b can block the first discharge path 27 (the second valve body 3b is closed). When the edge portion 32 of the second valve body 3b blocks the first discharge passage 27, the step portion 96 slightly causes the gap between the edge portion 32 of the second valve body 3b and the bottom portion 921 of the upper recessed portion 92b. The gap 30 is formed. This prevents the edge portion 32 of the second valve body 3b and the bottom portion 921 of the upper recessed portion 92b from excessively adhering (blocking), and the edge portion 32 of the second valve body 3b is the first portion. The state can be quickly changed from the state in which the discharge path 27 is blocked to the state in which the first discharge path 27 is opened, and the open state is surely achieved. Thereby, the responsiveness in the suction / discharge of the fluid F of the pump 1 is improved.

  Further, a pin 97 protrudes upward at a position (inside the stepped portion 96) slightly shifted to the right in FIG. 7 from the center portion of the bottom portion 921 of the upper recessed portion 92b. As shown in FIG. 7, the pin 97 is inserted into the positioning hole 33 formed in the central portion 31 of the second valve body 3b. Thereby, positioning with respect to the 2nd valve body storage chamber 22b (upper recessed part 92b) of the 2nd valve body 3b is performed reliably. The center portion 31 of the second valve body 3b positioned in this way is securely pressed against the bottom portion 921 of the upper concave portion 92b by a second support portion 63 described later (see FIG. 7). As described above, in the pump 1, the second valve body 3b is positioned with respect to the second valve body storage chamber 22b by the pin 97 of the upper concave portion 92b and the positioning hole 33 of the second valve body 3b. Positioning means is configured. As described above, the pin 97 is disposed at a position shifted from the center of the bottom 921 of the upper recess 92b. Accordingly, when the second valve body 3b is stored in the second valve body storage chamber 22b, the space (gap) in the second valve body storage chamber 22b is inserted into the right side in FIG. There is a difference in size between the left side and the left side. In the configuration shown in FIG. 7, the right side, that is, the space on the second discharge path 28 side is larger than the left side space. Thereby, the part (inner side part 321) by the side of the 2nd discharge path 28 of the edge part 32 of the 2nd valve body 3b can fully deform | transform.

  As shown in FIG. 5, the top plate 9 is placed on the bottom 921 of the upper recess 92b on the upper recess 92a side (left side in the figure), that is, on the portion displaced from the center of the second valve body 3b. Two through holes 98 penetrating in the thickness direction are formed. These through holes 98 function as the first discharge path 27. The 1st discharge path 27 is a flow path which transfers the fluid F from the pump chamber 21 to the 2nd valve body storage chamber 22b (refer FIG. 9). As described above, when the first discharge passage 27 is blocked by the second valve body 3b (when the second valve body 3b is closed), the fluid F from the pump chamber 21 to the discharge chamber 24 is discharged. The flow is interrupted.

  Thus, since the 1st discharge path 27 is comprised by the two through-holes 98, the 1st discharge path 27 is large enough for the fluid F to pass through the said 1st discharge path 27. It becomes. Thereby, for example, pressure loss in the first discharge path 27 can be prevented. Even if one of the two through holes 98 becomes clogged (closed) with a substance (such as dust) contained in the fluid F, for example, the other through hole 98 The fluid F can be transferred through the hole 98.

  The number of through holes 98 formed is not limited to two, and may be one or three or more, for example.

  As shown in FIG. 5, a storage groove 911 in which the packing 20 a is stored is formed on the top surface 91 of the top plate 9. The storage groove 911 communicates with the first groove 912 and the first groove 912 provided so as to surround the upper recesses 92a and 92b, and crosses between the upper recess 92a and the upper recess 92b. 2 grooves 913.

  As shown in FIG. 7, a lower concave portion 99 is formed on the lower surface 94 of the top plate 9. The lower recess 99 constitutes the pump chamber 21 whose volume increases or decreases. The lower concave portion 99 can be divided into a central portion 991 having different depths, an edge portion 992, and an intermediate portion 993 between the central portion 991 and the edge portion 992. The central portion 991 is a portion having the deepest depth. The edge 992 is a portion having the shallowest depth. The intermediate portion 993 is a portion whose depth gradually increases (changes) from the edge portion 992 toward the central portion 991, and has an inclined surface.

  In the pump 1, a space surrounded by the central portion 991 and the intermediate portion 993 of the lower concave portion 99 and the diaphragm 41 of the volume increasing / decreasing means 4 is a pump chamber 21. The volume of the pump chamber 21 is changed by the deformation of the diaphragm 41 (see FIGS. 7 to 9).

  As shown in FIG. 7, the inner lid 6 is installed on the upper surface 91 of the top plate 9 of the housing body 5. As shown in FIGS. 3 and 4, the inner lid 6 is constituted by a plate member having a quadrangular shape in a plan view, and the first valve body storage chamber 22 a and the first plate are formed between the inner lid 6 and the top plate 9 of the housing body 5. 2 valve body storage chambers 22b can be defined.

  On the lower surface 61 (first valve body storage chamber 22a) of the inner lid 6, a stepped portion (first projecting portion) 62 is located below (top) at a portion facing (corresponding to) the upper concave portion 92a of the top plate 9. The plate 9 is formed so as to protrude in the opposite direction to the first support portion 93 of the plate 9. The step portion 62 has a ring shape along the circumferential direction of the upper concave portion 92a (see FIG. 4). When the first valve body 3a is stored (installed) in the first valve body storage chamber 22a, the edge 32 of the first valve body 3a is pressed by the step portion 62, and the edge 32 The entire circumference of the warp (curve deformation). In this warped state, the edge portion 32 of the first valve body 3a can block the first suction passage 25 (the first valve body 3a is closed). When the edge portion 32 of the first valve body 3a closes the first suction passage 25, the step portion 62 causes a slight gap between the edge portion 32 of the first valve body 3a and the lower surface 61 of the inner lid 6. The gap 40 is formed (see FIGS. 7 and 9). Thereby, it is prevented that the edge part 32 of the 1st valve body 3a and the lower surface 61 of the inner cover 6 contact | adhere excessively (blocking), and the edge part 32 is 1st in the 1st valve body 3a. The suction passage 25 can be quickly deformed from the state in which the suction passage 25 is blocked to the state in which the first suction passage 25 is opened, and the opening state is reliably established. Thereby, the responsiveness in the suction / discharge of the fluid F of the pump 1 is improved.

  As shown in FIG. 4, the inner lid 6 is formed with an arcuate hole 64 having an arc shape inside a stepped portion 62 having a ring shape. The arc hole 64 is in a position shifted from the center of the first valve body 3a so as to be blocked by the edge 32 of the first valve body 3a (see FIG. 7). The arc hole 64 penetrates the inner lid 6 in the thickness direction and functions as the first suction path 25. The first suction path 25 is a flow path for transferring the fluid F from the suction chamber 23 to the first valve body storage chamber 22a (see FIG. 8). As described above, when the first suction passage 25 is blocked by the first valve body 3a (when the first valve body 3a is closed), the suction valve 23 to the first valve body storage chamber 22a. The flow of fluid F to is blocked.

  As described above, the first suction path 25 is configured by the circular arc hole 64 having an arc shape, so that, for example, the first suction path 25 is made to be less than the case where the first suction path 25 is configured by the pores. It is possible to suppress pressure loss that occurs when the fluid F passes, and thus it is possible to suppress (or prevent) a decrease in pump efficiency.

  As shown in FIG. 4, a second support portion (support surface) 63 is provided on the lower surface 61 (second valve body storage chamber 22 b) of the inner lid 6 at a portion facing the upper concave portion 92 b of the top plate 9. It protrudes and is formed so as to be curved downward (in a direction opposite to the stepped portion 96 of the top plate 9). As shown in FIG. 7, the 2nd support part 63 supports the 2nd valve body 3b. With the second support portion 63, the second valve body 3 b is crimped to the bottom portion 921 (wall surface (inner surface)) of the upper recessed portion 92 b of the top plate 9 in the vicinity of the center portion 31. That is, the vicinity of the central portion 31 of the second valve body 3b is sandwiched between the second support portion 63 and the bottom portion 921 of the upper concave portion 92b. Thereby, the 2nd valve body 3b is supported and fixed. Moreover, by being in such a crimped state, the edge portion 32 of the second valve body 3b can reliably block the first discharge path 27 of the housing 2 (the second valve body 3b is Closed). In this closed state, the flow of the fluid F from the pump chamber 21 to the discharge chamber 24 is reliably interrupted. Further, even when the second valve body 3b deteriorates with time and its elastic force (restoring force) is reduced, the second valve body 3b is reliably closed by being in a crimped state. Become. Therefore, it is possible to maintain a high pump efficiency over a long period of time.

  The second support part 63 has a flat shape. The entire circumference of the edge portion 631 of the second support portion 63 is rounded. As shown in FIG. 9, when the edge part 32 of the 2nd valve body 3b warped and the 1st discharge path 27 was released (the 2nd valve body 3b was in the open state), the 2nd support part Since the edge 631 of the 63 is rounded, the edge 32 of the second valve body 3b can be smoothly (reasonably) deformed (along) along the roundness, and warped (deformed). ) Is regulated. When the pump 1 is used, the second valve body 3b is repeatedly warped and restored from the warp (repetitively deformed). However, the second valve body 3b can be deformed as described above. Deterioration can be prevented or suppressed.

  In addition, as shown in FIG. 7, the second support portion 63 protrudes in the opposite direction to the first support portion 93. Accordingly, the direction in which the first support portion 93 presses the first valve body 3a and the direction in which the second support portion 63 presses the second valve body 3b are opposite to each other. As a result, the opening direction of the first valve body 3a is a direction from the upper side to the lower side, and the opening direction of the second valve body 3b is a direction from the lower side to the upper side. Thereby, the length of the path from the fluid F to the discharge chamber 24 through the first valve body storage chamber 22a, the pump chamber 21, and the second valve body storage chamber 22b in this order is relatively short. can do.

  As shown in FIG. 4, the inner lid 6 is formed with a circular arc hole 65 in the vicinity of the stepped portion 62 side of the second support portion 63. The circular arc hole 65 penetrates the inner lid 6 in the thickness direction similarly to the circular arc hole 64, and is a hole whose curving direction is opposite to that of the circular arc hole 64. The arc hole 65 functions as the second discharge path 28. The second discharge path 28 is a flow path for transferring the fluid F from the second valve body storage chamber 22b to the discharge chamber 24 (see FIG. 9).

  Further, since the second discharge path 28 is configured by the circular arc hole 65 having an arc shape, for example, the second discharge path 28 is made to be more fluid than the case where the second discharge path 28 is configured by pores. The pressure loss that occurs when F passes can be suppressed, and thus the reduction in pump efficiency can be suppressed (or prevented).

  As shown in FIG. 3, a housing groove 661 for housing the packing 20 b is formed on the upper surface 66 of the inner lid 6. The storage groove 661 communicates with the first groove 662 and the ring-shaped first groove 662 provided so as to surround the arc holes 64 and 65 (recesses 72a and 72b of the outer lid 7 described later). 64 and a second groove 663 crossing between the circular arc holes 65.

  The outer lid 7 is fixed to the upper surface 66 of the inner lid 6. The outer lid 7 covers the upper side (top side) of the housing body 5. As shown in FIG. 7, the outer lid 7 is a plate member, and two concave portions 72 a and 72 b are formed on the lower surface 71 thereof. The recess 72a defines the suction chamber 23 into which the fluid F is sucked from the outside, with the upper surface 66 of the inner lid 6. The recess 72 b defines the discharge chamber 24 for discharging the sucked fluid F with the upper surface 66 of the inner lid 6.

  As shown in FIGS. 1, 2, and 6, a suction port 73 and a discharge port 74 project from the edge of the outer lid 7.

  The suction port 73 has a tubular shape, and the inside thereof communicates with the suction chamber 23 (recessed portion 72a) (see FIG. 7). For example, an end portion of a tube (not shown) can be connected to the suction port 73, so that the fluid F flowing down the tube is sucked into the suction chamber 23 through the suction port 73. The suction port 73 may be formed with a reduced diameter portion (constriction portion) whose outer diameter is reduced in the middle of the outer peripheral portion thereof. Thereby, it is possible to reliably prevent the tube connected to the suction port 73 from biting into the reduced diameter portion and unintentionally pulling out the tube.

  The discharge port 74 has a tubular shape, and the inside thereof communicates with the discharge chamber 24 (recess 72b). For example, an end of a tube (not shown) can be connected to the discharge port 74, so that the fluid F from the discharge chamber 24 can be discharged to the tube via the discharge port 74. . The discharge port 74 may be formed with a reduced diameter portion (constriction portion) whose outer diameter is reduced in the middle of the outer peripheral portion thereof. Thereby, it is possible to reliably prevent the tube connected to the discharge port 74 from biting into the reduced diameter portion and unintentionally pulling out the tube.

  The suction port 73 and the discharge port 74 protrude in the same direction. Thereby, the flow direction of the fluid F can be changed via the pump 1, that is, the flow of the fluid F can be changed to the opposite direction.

  As shown in FIGS. 1 and 2, two markers 731 and 741 that indicate the direction of the flow of the fluid F are attached to the upper surface 75 of the outer lid 7.

  The marker 731 is disposed in the vicinity of the suction port 73. The marker 731 has an isosceles triangle shape, and the top portion 732 faces the suction direction of the fluid F.

  The marker 741 is disposed in the vicinity of the discharge port 74. The marker 741 has an isosceles triangle shape, and the top portion 742 faces the fluid F discharge direction.

  A packing 20 a is inserted (intervened) between the top plate 9 and the inner lid 6 of the housing body 5, and a packing 20 b is inserted between the inner lid 6 and the outer lid 7. .

  Each of the packings 20a and 20b includes a frame portion 201 having a frame shape and a beam portion 202 that traverses the inside of the frame portion 201.

  In the packing 20 a, the frame portion 201 is inserted into the first groove 912 of the storage groove 911 of the top plate 9, and the beam portion 202 is inserted into the second groove 913 of the storage groove 911. Further, the thickness of the packing 20a in a natural state (a state in which no external force is applied) is slightly larger than the depth of the storage groove 911. Thereby, the packing 20a is compressed between the top plate 9 and the inner lid 6, and the first valve body storage chamber 22a and the second valve body storage chamber 22b of the housing 2 are hermetically sealed. Can be stopped.

  In the packing 20 b, the frame portion 201 is inserted into the first groove 662 of the storage groove 661 of the inner lid 6, and the beam portion 202 is inserted into the second groove 663 of the storage groove 661. Further, the thickness of the packing 20b in the natural state is slightly larger than the depth of the storage groove 661. Thereby, the packing 20b is compressed between the inner lid 6 and the outer lid 7, and the suction chamber 23 and the discharge chamber 24 of the housing 2 can be hermetically and liquid-tightly sealed.

  In addition, although it does not specifically limit as a constituent material of packing 20a, 20b, For example, various rubber materials (especially vulcanized thing) like urethane rubber, silicone rubber, fluororubber, polyolefin type, polyvinyl chloride type Various thermoplastic elastomers such as polyurethanes, polyesters, polyamides, and fluororubbers can be used, and one or more of these can be used in combination.

  Further, the constituent materials of the above-described members (housing main body 5, inner lid 6, outer lid 7) constituting the housing 2 excluding the packings 20a and 20b are not particularly limited. For example, polyethylene, polypropylene, etc. Various thermoplastic resins can be used.

  As shown in FIGS. 7-9, the 1st valve body 3a is accommodated in the 1st valve body storage chamber 22a, and the 2nd valve body 3b is accommodated in the 2nd valve body storage chamber 22b. Has been. Each of the first valve body 3a and the second valve body 3b has a disk shape. The first valve body 3a and the second valve body 3b are each made of an elastic body, and the material thereof is not particularly limited. For example, the elastic material as mentioned in the description of the packings 20a and 20b In particular, it is more preferable to use fluororubber. By using fluororubber as the constituent material, for example, when the fluid F is a chemical solution, the first valve body 3a and the second valve body 3b each exhibit chemical resistance. Further, the first valve body 3a and the second valve body 3b are each easily prevented from being deteriorated over time (sagging (elongation)).

  As shown in FIG. 7, when the first valve body 3a closes the first suction passage 25 (when in the closed state), the edge portion 32 is located on the first suction passage 25 side by the step portion 62. The degree of warping of this part (inner part 321) is smaller than the degree of warping of the opposite part (outer part 322) through the center of the first valve body. Thereby, in the 1st valve body storage chamber 22a, there is no space which can deform | transform the outer part 322 of the edge part 32 of the 1st valve body 3a substantially, For this reason, a dead space becomes small. Further, a counterclockwise moment in FIG. 7 acts on the first valve body 3a, so that the first suction path 25 can be more reliably blocked.

  In addition, as shown in FIG. 7, when the second valve body 3b closes the first discharge path 27 (when in the closed state), the stepped portion 96 causes an edge to be formed in the same manner as the first valve body 3a. In the portion 32, the degree of warping of the first discharge passage 27 side (inner side 321) is more than the degree of warping of the opposite side (outer side 322) through the center of the first valve body. It is getting smaller. Thereby, in the 2nd valve body storage chamber 22b, there is no space which can deform | transform the outer side part 322 of the edge part 32 of the 2nd valve body 3b substantially, For this reason, a dead space becomes small. Further, a counterclockwise moment in FIG. 7 acts on the second valve body 3b, so that the first discharge path 27 can be more reliably blocked.

  Further, in the second valve body storage chamber 22b, there is no space that allows the outer portion 322 of the edge 32 of the second valve body 3b to be substantially deformed, and therefore the dead space is reduced.

  As shown in FIG. 2, the first valve body 3a and the second valve body 3b have the same size (shape). Thereby, when the pump 1 is assembled, the first valve body 3a can be stored in the first valve body storage chamber 22a, and the second valve body 3b can be stored in the second valve body storage chamber 22b. Needless to say, the first valve body 3a can be stored in the second valve body storage chamber 22b, and the second valve body 3b can be stored in the first valve body storage chamber 22a. Therefore, the mistake of assembling the valve body is prevented.

  As described above, the first valve body 3a is a disk-shaped member. Thus, when the first valve body 3a is assembled (attached) into the first valve body storage chamber 22a, the assembling work is performed regardless of the front and back of the first valve body 3a and the direction around the axis. (Assembly work) can be performed (the same applies to the second valve body 3b). Therefore, the assembly work of the first valve body 3a is facilitated.

  Further, the pump 1 may be periodically disassembled (during maintenance), the first valve body 3a may be reversed (turned over), and the front and back thereof may be reversed. Thereby, since the deformation | transformation direction of the inner side part 321 of the edge part 32 of the 1st valve body 3a reverses, it can prevent that the said inner side part 321 becomes unintentionally deformed. Therefore, it contributes to maintaining high pump efficiency.

Next, the volume increasing / decreasing means 4 for increasing / decreasing the volume of the pump chamber 21 will be described.
As shown in FIG. 2, the volume increasing / decreasing means 4 includes a diaphragm 41 that defines a part of the pump chamber 21 and a drive mechanism that drives the diaphragm 41 so that the diaphragm 41 is deformed.

  The diaphragm 41 includes a deformable film-shaped deformable portion 411 and a rod-shaped shaft portion 412 fixed to the deformable portion 411.

  The deformation part 411 is made of an elastic material as described above and can be easily deformed (see FIGS. 7 to 9). As the deforming portion 411 is deformed (approaching and moving away from the central portion 991 and the intermediate portion 992 of the top plate 9 of the housing body 5), the volume of the pump chamber 21 increases or decreases. Further, the edge of the deforming portion 411 is sandwiched and fixed between the base portion 8 of the housing body 5 and the top plate 9. A flange portion 413 protruding downward is formed at the edge of the deformable portion 411. The flange portion 413 engages with the groove 822 of the base portion 8.

  The shaft portion 412 is fixed to the central portion on the back side of the deformable portion 411 by, for example, fusion. When the shaft portion 412 reciprocates in the vertical direction, the deformable portion 411 can be deformed. A male screw (not shown) is formed on the outer peripheral portion of the shaft portion 412.

  As shown in FIG. 2, the drive mechanism for driving the diaphragm 41 includes a motor 42, a crank member 43 fixed to the rotating shaft 421 of the motor 42, and the crank member 43 inserted therein, and is rotatable with respect to the crank member 43. A bearing 44, a connecting member 45 that connects the bearing 44 and the diaphragm 41, a joint 46 that is connected (connected) to the crank member 43, and a bearing 47 that supports the joint 46.

  The motor 42 is composed of, for example, a servo motor or a stepping motor. Two lead wires 422 are installed in the motor 42, and power is supplied from a power source (not shown) via each lead wire 422. Note that the number of lead wires 422 is not limited to two, and may be, for example, three or more. Further, instead of the lead wire 422, a metal terminal may be provided.

  A crank member 43 is fixed to the rotating shaft 421 of the motor 42. The crank member 43 is formed with a shaft portion 432 that is coaxially connected to the rotating shaft 421 of the motor 42. The shaft portion 432 has a cylindrical outer shape and is inserted into the joint 46. A cylindrical crank portion 431 that is eccentric with respect to the shaft portion 432 is formed in the middle (end portion) of the shaft portion 432.

  A connecting member 45 is connected to the crank portion 431 of the crank member 43 through a bearing 44. The connecting member 45 includes a ring-shaped fitting portion 452 into which the bearing 44 is fitted, and a fixed portion 451 that is formed to protrude upward from the outer peripheral portion of the fitting portion 452. The fixing portion 451 is formed with a female screw 453 into which the male screw of the shaft portion 412 of the diaphragm 41 is screwed. When the male screw of the shaft portion 412 of the diaphragm 41 is screwed into the female screw 453, the diaphragm 41 is fixed to the connecting member 45.

  As described above, the crank portion 431 of the crank member 43 is eccentric with respect to the shaft portion 432. Thereby, when the crank member 43 is rotated by the operation of the motor 42, the connecting member 45 connected to the crank member 43 via the bearing 44 reciprocates in the vertical direction. Since the shaft portion 412 of the diaphragm 41 is fixed to the connecting member 45, the shaft portion 412 also reciprocates in the vertical direction. Thereby, the deformation | transformation part 411 deform | transforms and the volume of the pump chamber 21 increases / decreases.

  A pin-shaped (tubular) joint 46 is coupled to the shaft portion 432 of the crank member 43. The crank member 43 is supported by a bearing 47 through a joint 46 in addition to the bearing 44 described above. Further, the bearing 47 is fitted in the fitting portion 103 of the back cover 10 of the housing body 5.

  With the volume increasing / decreasing means 4 having such a configuration, the volume of the pump chamber 21 is reliably increased or decreased. The frequency at which the volume of the pump chamber 21 increases or decreases, that is, the deformation portion 411 of the diaphragm 41 is deformed (reciprocates) is not particularly limited, but is preferably 20 to 150 Hz, for example.

Next, the operation state of the pump 1 will be described in detail.
First, the pump 1 is in a stopped state shown in FIG. In the stopped state, as described above, the first valve body 3 a is in a crimped state, and the inner portion 321 of the edge portion 32 blocks the first suction path 25. Thereby, the flow of the fluid F from the suction chamber 23 to the pump chamber 21 is interrupted. Similarly, the second valve body 3 b is also in a crimped state, and the inner portion 321 of the edge portion 32 blocks the first discharge path 27. Thereby, the flow of the fluid F from the pump chamber 21 to the discharge chamber 24 is interrupted.

  When the motor 42 operates from this pump stop state, the crank member 43 rotates. As the crank member 43 rotates, the diaphragm 41 is deformed as described above. At this time, although depending on the moving direction of the shaft portion 412 of the diaphragm 41, for example, as shown in FIG. 8, when the shaft portion 412 moves downward, the volume of the pump chamber 21 increases. Thereby, the pump chamber 21 is depressurized, and the first valve body storage chamber 22a communicating with the pump chamber 21 via the second suction path 26 is also depressurized (becomes a depressurized state). At this time, a difference in internal pressure is generated between the first valve body storage chamber 22 a and the suction chamber 23. Thereby, as for the 1st valve body 3a, the inner side part 321 of the edge part 32 is pushed and expanded toward the downward direction. As a result, the first suction passage 25 that has been blocked by the first valve body 3a is opened, so that the fluid F flows from the suction chamber 23 to the pump chamber 21 via the first valve body storage chamber 22a. (See FIG. 8). The fluid F that has flowed into the pump chamber 21 is temporarily stored in the pump chamber 21 because the first discharge path 27 extending downstream from the pump chamber 21 is still blocked.

  Next, as shown in FIG. 9, when the movement of the shaft portion 412 of the diaphragm 41 starts from the downward movement to the upward movement, the volume of the pump chamber 21 decreases. Thereby, the pressure in the pump chamber 21 is increased.

  At this time, the first valve body storage chamber 22a is also pressurized, and the inner portion 321 of the edge portion 32 of the first valve body 3a is pushed back upward. When the inner portion 321 of the edge portion 32 of the first valve body 3a is pushed back upward and the restoring force of the inner portion 321, the first suction path 25 is closed again by the inner portion 321. That is, the suction path (suction system) of the pump 1 is shut off again (see FIG. 9). Further, the pump 1 is configured such that the first valve body 3a is in a pressure-bonded state, the first valve body 3a is pressed by the internal pressure of the first valve body storage chamber 22a, The first suction path 25 is configured to be more reliably blocked by a synergistic effect with the restoring force of the valve body 3a.

  On the other hand, in the discharge path (discharge system) of the pump 1, the internal pressure difference is generated between the pump chamber 21 and the second valve body storage chamber 22 b because the pump chamber 21 is increased in pressure. Thereby, as for the 2nd valve body 3b, the inner side part 321 of the edge part 32 is pushed and expanded toward upper direction. As a result, the first discharge passage 27 closed by the second valve body 3b is opened, and thus the fluid F flows from the pump chamber 21 to the discharge chamber 24 via the second valve body storage chamber 22b ( (See FIG. 9). The fluid F is discharged to the outside through the discharge port 74.

Next, when the shaft portion 412 of the diaphragm 41 moves downward again, as described above, the first valve body 3a is opened again and the second valve body 3b is closed again.
In the pump 1, such an operation is repeated.

Second Embodiment
FIG. 10 is a cross-sectional view (a diagram showing a stopped state) showing a second embodiment of the pump of the present invention.

  Hereinafter, the second embodiment of the pump of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

  This embodiment is mainly the same as the first embodiment except that the configurations of the suction chamber and the discharge chamber partitioned inside the housing are different.

  In the pump 1A shown in FIG. 10, two concave portions 67a and 67b are formed on the upper surface 66 of the inner lid 6A. The suction chamber 23 is defined by the recess 67a and the lower surface 71 of the outer lid 7A. The discharge chamber 24 is defined by the recess 67b and the lower surface 71 of the outer lid 7A.

  As shown in FIG. 10, an arc hole 64 that functions as the first suction path 25 communicates with the recess 67a. An arc hole 65 that functions as the second discharge path 28 communicates with the recess 67b.

  In addition, a suction port 68 and a discharge port 69 are formed to project from the edge of the inner lid 6A. The suction port 68 has a tubular shape, and the inside thereof communicates with the suction chamber 23 (recess 67a). The discharge port 69 has a tubular shape, and the inside thereof communicates with the discharge chamber 24 (recess 67b).

  A storage groove 711 for storing the packing 20b is formed on the lower surface 71 of the outer lid 7A. The storage groove 711 has a shape corresponding to the packing 20b in the same manner as the storage groove 661 of the inner lid 6 of the first embodiment.

  The pump of the present invention has been described with respect to the illustrated embodiment. However, the present invention is not limited to this, and each part constituting the pump is replaced with one having an arbitrary configuration that can exhibit the same function. can do. Moreover, arbitrary components may be added.

It is a perspective view which shows 1st Embodiment of the pump of this invention. It is a disassembled perspective view of the pump shown in FIG. FIG. 3 is an enlarged perspective view of an inner lid in FIG. 2. It is the figure (perspective view) which looked at the inner lid shown in FIG. 3 from the lower surface side (back side). It is an expansion perspective view of the top plate in FIG. It is a side view of the pump shown in FIG. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 (a cross-sectional view showing the operating state of the pump shown in FIG. 1 (a view showing a stopped state)). FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 (a cross-sectional view showing the operating state of the pump shown in FIG. 1 (a view showing a fluid suction state)). FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 (a cross-sectional view showing the operating state of the pump shown in FIG. 1 (a view showing a fluid discharge state)). It is sectional drawing (figure which shows a stop state) which shows 2nd Embodiment of the pump of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Pump 2 Housing 21 Pump chamber 22a 1st valve body storage chamber 22b 2nd valve body storage chamber 23 Suction chamber 24 Discharge chamber 25 1st suction path 26 2nd suction path 27 1st discharge path 28 2nd discharge path 3a 1st valve body 3b 2nd valve body 31 Center part 32 Edge (outer peripheral part)
321 Inner part 322 Outer part 33 Positioning hole 4 Volume increasing / decreasing means 41 Diaphragm 411 Deformed part 412 Shaft part 413 Flange part 42 Motor 421 Rotating shaft 422 Lead wire 43 Crank member 431 Crank part 432 Shaft part (cam follower)
44 Bearing 45 Connecting member 451 Fixed portion 452 Fitting portion 453 Female screw 46 Joint 47 Bearing 5 Housing body 6, 6A Inner lid 61 Lower surface 62 Stepped portion (first protrusion)
63 2nd support part (support surface)
631 Edge 64, 65 Arc hole 66 Upper surface 661 Storage groove 662 First groove 663 Second groove 67a, 67b Recess 68 Intake port 69 Discharge port 7, 7A Outer cover 71 Lower surface 711 Storage groove 72a, 72b Recess 73 Intake port 731 Marker 732 Top part 74 Discharge port 741 Marker 742 Top part 75 Upper surface 8 Base part 81a, 81b Side wall 82 Connection part (top part)
821 Through-hole 822 Groove 83 Gap 84 Claw 9 Top plate 91 Top surface 911 Storage groove 912 1st groove 913 2nd groove 92a, 92b Upper side recessed part 921 Bottom part 93 1st support part (support surface)
931 Edge portion 932 Pin 94 Lower surface 95 Through hole 96 Step portion (second protrusion)
97 Pin 98 Through-hole 99 Lower side recess 991 Center part 992 Edge part 993 Intermediate part 10 Back cover 101 Bottom plate 102 Side wall 103 Fitting part 20a, 20b Packing 201 Frame part 202 Beam part 30, 40 Gap F Fluid

Claims (19)

A pump chamber whose volume can be increased or decreased, a suction chamber into which fluid is sucked, a discharge chamber for discharging fluid, and a first valve body storage chamber positioned between the pump chamber and the suction chamber; A first suction passage that is partitioned into a second valve body storage chamber located between the pump chamber and the discharge chamber, and that communicates the suction chamber and the first valve body storage chamber. A second suction passage that communicates the first valve body storage chamber and the pump chamber, a first discharge passage that communicates the pump chamber and the second valve body storage chamber, and the second A housing provided with a second discharge path communicating with the valve body storage chamber and the discharge chamber;
A disc-shaped first valve body housed in the first valve body storage chamber and made of an elastic body;
A second valve body, which is housed in the second valve body storage chamber and is made of an elastic body and has a disk shape;
Volume increasing / decreasing means for increasing / decreasing the volume of the pump chamber,
The first valve body storage chamber is formed with a first support portion projectingly formed by crimping the center portion of the first valve body to the inner surface thereof, and supporting the first valve body,
In the second valve body storage chamber, a center part of the second valve body is pressure-bonded to the inner surface thereof, and a second support part for supporting the second valve body is formed to protrude,
The first valve body is capable of opening and closing the first suction passage at least a part of an outer peripheral portion thereof in a state in which the first valve body is crimped to the inner surface of the first valve body storage chamber by the first support portion. Deformed,
The second valve body is capable of opening and closing the first discharge passage at least a part of the outer peripheral portion in a state where the second valve body is crimped to the inner surface of the second valve body storage chamber by the second support portion. A pump configured to be deformed.   2. The pump according to claim 1, wherein at least one of the first support portion and the second support portion has a support surface configured by a curved projecting surface.   The pump according to claim 2, wherein the support surface of the first support portion has a function of regulating a deformation limit when the first valve body opens the first suction path.   The pump according to claim 2 or 3, wherein the support surface of the second support portion has a function of regulating a deformation limit when the second valve body opens the first discharge path. The first valve body storage chamber and the second valve body storage chamber are arranged side by side,
The pump according to claim 1 or 2, wherein the first support portion and the second support portion protrude in opposite directions.   2. The first valve body storage chamber is formed with a first protrusion that protrudes in a direction opposite to the first support part, which warps the entire outer periphery of the first valve body. 6. The pump according to any one of 5 to 5. The first suction path is in a position shifted from the center of the first valve body,
The degree of curvature of the portion on the first suction path side of the outer peripheral portion of the first valve body is smaller than the degree of curvature of the portion on the opposite side through the center of the first valve body. 6. The pump according to 6.   2. The second valve body storage chamber is provided with a second protrusion that protrudes in a direction opposite to the second support part, which warps the entire outer periphery of the second valve body. The pump according to any one of 7 to 7. The first discharge path is at a position shifted from the center of the second valve body,
The outer peripheral portion of the second valve body has a degree of warpage of a portion on the first discharge path side smaller than a degree of warpage of the portion on the opposite side through the center of the second valve body. 8. The pump according to 8.   The pump according to any one of claims 1 to 9, wherein at least one of the first suction path and the second discharge path is configured by an arc hole having an arc shape.   The pump according to any one of claims 1 to 10, wherein at least one of the second suction path and the first discharge path is configured by a plurality of through holes.   The pump according to any one of claims 1 to 11, wherein the first valve body and the second valve body have the same size.   The pump according to any one of claims 1 to 12, further comprising first positioning means for positioning the first valve body with respect to the first valve body storage chamber.   The pump according to any one of claims 1 to 13, further comprising second positioning means for positioning the second valve body with respect to the second valve body storage chamber.   The volume increasing / decreasing means includes a diaphragm that defines a part of the pump chamber and increases or decreases the volume of the pump chamber by deformation, and a drive mechanism that drives the diaphragm so that the diaphragm deforms. The pump in any one of thru | or 14. The housing has a housing body, an outer lid that covers the top side of the housing body, and an inner lid that is interposed between the housing body and the outer lid,
The suction chamber and the discharge chamber are defined by the outer lid and the inner lid, and the first valve body storage chamber and the second valve body storage chamber are formed by the housing body and the inner lid. The pump according to any one of claims 1 to 15, wherein the pump is defined.   The pump according to any one of claims 1 to 16, wherein the housing has packings respectively inserted between the housing main body and the inner lid and between the inner lid and the outer lid.   18. The pump according to claim 1, wherein the housing has a tubular suction port communicating with the suction chamber and a tubular discharge port communicating with the discharge chamber, respectively.   The pump according to claim 18, wherein the suction port and the discharge port protrude in the same direction.

Images