JP2008248698A - Thin water-cooled pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin water-cooled pump in which counterflow of liquid is reduced to provide a stable flow rate. <P>SOLUTION: The thin water-cooled pump is constituted of: a thin pump base having a suction pipe in which the liquid enters and a discharge pipe from which the liquid is discharged; a plate of a bottom plate of a pump chamber put on the pump base, having a through hole in which the liquid flows from the suction pipe to the pump chamber and a through hole in which the liquid flows from the pump chamber to the discharge pipe; a suction side check valve controlling the flow of liquid in one direction by installation of a leaf spring to an upper surface of the through hole on the suction side of the plate; a discharge side check valve controlling the flow of the liquid in one direction by installation of the leaf spring to a lower surface of the through hole on the discharge side of the plate; a piezoelectric element sucking or delivering the liquid in/from the pump chamber by the vibration on the upper side of the plate; and a cover covering the pump base housing the plate and the piezoelectric element. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thin water-cooled pump used for cooling an electronic device having a heat generating part such as a personal computer or a projector or for feeding a fuel cell.

  There are two types of cooling for electronic devices: air cooling and water cooling, but in today's electronic devices where quietness is required, water cooling is better than air cooling in pursuing quietness while maintaining cooling capacity. Efficiency is good.

  FIG. 17 is a view showing a structure of a check valve of a conventional pump. The upper stage of FIG. 17 is a plate valve for controlling the flow of liquid in one direction by providing a through-hole 11 through which liquid passes in the plate 17 of the pump chamber and applying a resilient plate valve 17a such as rubber to the through-hole 11. Check valve with structure.

  Moreover, as shown in the lower part of FIG. 17, the umbrella which controls the liquid flow in one direction by opening the through hole 11 in the plate 17 of the pump chamber and closing the through hole 11 with an elastic umbrella valve 17b such as rubber. There is also a check valve with a valve structure.

As described in Patent Document 1, a piezoelectric pump having a high degree of freedom in design that is excellent in mass productivity and capable of easily changing the flow rate, a manufacturing method thereof, and an invention of a check valve structure are also disclosed.
JP 2006-046272 A

  However, the conventional plate valve and umbrella valve are made of rubber, so they are easily deteriorated. Also, wear occurs on the surface of the through hole due to the reciprocating movement of the valve, the seal of the through hole becomes weak, and it can be used stably for a long time. Can not do it. Also, rubber valves are inferior in terms of discharge pressure.

  Moreover, although the invention described in Patent Document 1 has an umbrella valve structure, the thickness of the entire pump becomes large, and a thin pump is required when mounted on a small electronic device such as a notebook computer.

  Therefore, an object of the present invention is to provide a thin water-cooled pump that can obtain a stable flow rate with less liquid backflow.

  In order to solve the above problems, the present invention is a thin pump base 2 having a suction pipe 3 into which liquid enters and a discharge pipe 4 through which liquid comes out, and a bottom plate of a pump chamber 15 placed on the pump base 2. A plate spring having a through hole 11 through which liquid passes from the suction pipe 3 to the pump chamber 15 and a through hole 11a through which liquid flows from the pump chamber 15 to the discharge pipe 4, and a plate spring on the upper surface of the through hole 11 on the suction side of the plate 9 A suction-side check valve 10 that controls the flow of liquid in one direction by attaching 16 and a discharge that controls the flow of liquid in one direction by attaching a leaf spring 16 to the lower surface of the through-hole 11a on the discharge side of the plate 9. The pump chamber 15 is sealed between the plate 9 and the piezoelectric element 7 and the side check valve 10a, the piezoelectric element 7 that sucks and pumps the liquid into the pump chamber 15 by vibrating on the upper side of the plate 9. An annular element mounting rubber 8a, a cover 5 that covers the pump base 2 containing the plate 9 and the piezoelectric element 7, and an annular damper rubber 8 that is a buffer material sandwiched between the piezoelectric element 7 and the cover 5 It was set as the structure of the thin water-cooled pump characterized by consisting of these.

  Since this invention is the above structure, the following effects are acquired. First, by making a crease in the vicinity of the retaining hole position of the metal leaf spring and making it convex with respect to the through hole, the fixed leaf spring can be in close contact with the through hole and seal the through hole firmly. And the operation of the pump is stable.

  Secondly, after punch holes are made in the plate of the pump chamber by punching, pressing around the through holes with half piercing prevents the burr generated by punching from contacting the leaf spring. The sealability of the through hole can be improved.

  Third, by providing a dust discharge groove between the through hole and the retaining hole of the plate, it becomes possible to discharge the dust sandwiched between the plate and the leaf spring, and the sealing performance of the through hole is improved. .

  Fourth, by controlling the flow of the liquid by providing a rectifying protrusion on the plate, the flow speed of the liquid is increased and the mixed gas can be discharged, so that the flow rate of the pump is stabilized.

  The present invention has a purpose of obtaining a stable flow rate with less liquid backflow, and has a plate attached to the check valve by folding the plate spring or by curving the plate spring to make it convex with respect to the plate. A check valve structure in which the spring is in close contact with the through hole. After the through hole is punched in the plate, the periphery of the through hole is pressed with half piercing from the side where the valve is attached. A through hole structure that prevents burrs in the through hole from coming into contact, a dust discharge groove is provided between the plate through hole and the check valve mounting position, and dust that can be discharged between the plate and the check valve can be discharged. Clogging prevention structure, and a rectifying protrusion on the plate, and by controlling the flow of liquid from the suction side to the discharge side in the pump chamber, the gas flow rate can be increased, and the gas vent that can discharge the gas mixed in the liquid Structure It was realized by.

  Below, based on an accompanying drawing, the thin water cooling pump which is the present invention is explained in detail. FIG. 1 is a perspective view of a thin water cooling pump according to the present invention. FIG. 2 is a plan view of a thin water-cooled pump according to the present invention.

  In the thin water-cooled pump 1, the base 2 is a pump base in which plastic or the like is molded into a container shape. The inside is hollow and the upper surface is open, and the piezoelectric element 7 described in FIG. 3 and the plate 9 described in FIG. A suction pipe 3 and a discharge pipe 4 are provided on the side surface. Moreover, the attachment hole 2a, the protrusion part 2b, etc. are provided.

  The mounting holes 2a are holes provided at the four corners for screwing the base 2 to an electronic device or the like. The protruding portion 2 b is a space provided for the electric wire 6 that supplies power to the piezoelectric element 7 in the base 2.

  The suction pipe 3 is a pipe extending from the inside of the base 2 to the outside, and sucks an external liquid into the base 2 from the suction port 3a. The discharge pipe 4 is a pipe extending from the inside of the base 2 to the outside, and discharges the liquid in the base 2 from the discharge port 4a to the outside.

  The cover 5 is a lid that closes the upper surface of the base 2 and includes a lid portion 5a and an edge portion 5b. The lid 5 a is a raised portion at the center and covers the piezoelectric element 7 and the plate 9 in the base 2. The edge portion 5b is a flat portion around the lid portion 5a, and a plurality of retaining holes 5c for fixing to the base 2 with the fastener 6a are formed.

  FIG. 3 is a plan view of the thin water-cooled pump according to the present invention with the cover removed. The cover 5 is fitted in the recessed portion 2c slightly depressed on the surface of the base 2, but can be removed by removing all the fasteners 6a fixed to the retaining holes 2d.

  In the base 2 with the cover 5 removed, a piezoelectric element 7 is disposed in the center, and a damper rubber 8 is placed on the outer periphery of the piezoelectric element 7. The damper rubber 8 is an annular cushioning material and presses the piezoelectric element 7 by being sandwiched between the piezoelectric element 7 and the cover 5.

  The piezoelectric element 7 is an element that converts electrical energy and mechanical energy. When a voltage is applied to the disk-shaped piezoelectric element 7, it is deformed by the inverse piezoelectric effect. That is, it can be vibrated by applying an alternating electric field to the piezoelectric element 7.

  In the piezoelectric element 7, a connecting portion 7 a extends from the outer peripheral portion on the protruding portion 2 b side of the base 2. The electric wire 6 is connected via the connection part 7a, and electricity is supplied to the piezoelectric element 7 from an external power source.

  FIG. 4 is a plan view of the thin water-cooled pump according to the present invention with the piezoelectric element removed. In the base 2 from which the piezoelectric element 7 and the damper rubber 8 are removed, a plate 9 is disposed at the center, and an annular element mounting rubber 8 a is placed on the outer periphery of the plate 9.

  That is, the space surrounded by the piezoelectric element 7, the plate 9 and the element mounting rubber 8 a is the pump chamber 15. The element mounting rubber 8a secures a space between the piezoelectric element 7 and the plate 9, and seals the outer peripheral portions of the piezoelectric element 7 and the plate 9 so that the liquid in the pump chamber 15 does not leak.

  The plate 9 is fixed to the base 2 by the fastener 6b, but the piezoelectric element 7 is simply placed on top. Moreover, since the piezoelectric element 7 vibrates, the damper rubber 8 and the element mounting rubber 8a are pressed from above and below to stabilize the position.

  The plate 9 has a disk shape, and a through hole 11 for sucking liquid from the base 2 to the pump chamber 15 and a through hole 11a for discharging liquid from the pump chamber 15 to the base 2 are opened. The through holes 11 and 11a are provided with check valves 10 and 10a for preventing the back flow by controlling the liquid flow in only one direction.

  When the piezoelectric element 7 is deformed outside the pump chamber 15, the liquid is sucked into the pump chamber 15, and when the piezoelectric element 7 is deformed inside the pump chamber 15, the liquid is discharged from the pump chamber 15.

  During inhalation, the check valve 10 on the suction side opens and liquid flows in, and the check valve 10a on the discharge side closes to prevent the liquid from flowing out. At the time of discharge, the check valve 10 on the suction side is closed to prevent the inflow of liquid, and the check valve 10a on the discharge side is opened to allow the liquid to flow out.

  FIG. 5 is a plan view of the thin water-cooled pump according to the present invention with the plate removed. The plate 9 can be removed by removing all the fasteners 6b fixed to the retaining holes 2e of the base 2.

  In the base 2 from which the plate 9 and the element mounting rubber 8 a are removed, there are a suction hole 3 b that is an outlet of the suction pipe 3 and a discharge hole 4 b that is an inlet of the discharge pipe 4. The suction hole 3b and the suction-side through hole 11 are aligned, and the discharge hole 4b and the discharge-side through hole 11a are aligned.

  The suction pipe 3 and the discharge pipe 4 are disposed below the recess 2c, and the suction hole 3b and the discharge hole 4b are provided so as to protrude above the recess 2c. The suction holes 3b and the discharge holes 4b are provided with O-rings 8b along the edges, and are sealed so that there are no gaps between the through holes 11 and 11a of the plate 9.

  From the above, the thin water-cooled pump 1 is a thin pump base 2 having a suction pipe 3 into which liquid enters and a discharge pipe 4 through which liquid flows, and a bottom plate of a pump chamber 15 placed on the pump base 2. A plate 9 having a through hole 11 through which liquid passes through the pump chamber 15, a through hole 11 a through which liquid flows from the pump chamber 15 to the discharge pipe 4, and a plate spring 16 is attached to the upper surface of the through hole 11 on the suction side of the plate 9. A suction-side check valve 10 for controlling the flow of liquid in one direction, and a discharge-side check valve for controlling the flow of liquid in one direction by attaching a leaf spring 16 to the lower surface of the through-hole 11a on the discharge side of the plate 9. 10a, a piezoelectric element 7 that sucks and pumps liquid into the pump chamber 15 by vibrating on the upper side of the plate 9, and a ring that is sandwiched between the plate 9 and the piezoelectric element 7 to seal the pump chamber 15 It comprises an element mounting rubber 8 a, a cover 5 that covers the pump base 2 containing the plate 9 and the piezoelectric element 7, and an annular damper rubber 8 that is a buffer material sandwiched between the piezoelectric element 7 and the cover 5. It is characterized by that.

  FIG. 6 is a cross-sectional view of the thin water-cooled pump according to the present invention cut along AA in FIG. 2. FIG. 7 is a cross-sectional view of the thin water-cooled pump according to the present invention cut along BB in FIG. FIG. 8 is a cross-sectional view of the thin water-cooled pump according to the present invention cut along CC in FIG.

  In the base 2, a plate 9 is installed on the suction hole 3b and the discharge hole 4b via an O-ring 8b, a piezoelectric element 7 is mounted on the plate 9 via an element mounting rubber 8a, and a damper is further provided thereon. Cover 5 is covered with rubber 8.

  The pump chamber 15 is sealed by the piezoelectric element 7, the plate 9, and the element mounting rubber 8a, and the liquid flows inside. By applying an alternating electric field to the piezoelectric element 7, the piezoelectric element 7 is vibrated, and the suction and discharge of the liquid are repeated.

  When the piezoelectric element 7 is deformed and the volume of the pump chamber 15 is expanded, a negative pressure is generated, the liquid is sucked into the suction pipe 3 from the suction port 3a, and the liquid reaching the suction hole 3b pushes the check valve 10 open. The liquid flows into the pump chamber 15 from the through hole 11.

  In addition, the piezoelectric element 7 is deformed in the opposite direction and the volume of the pump chamber 15 is reduced to generate pressure. The liquid in the pump chamber 15 pushes the check valve 10a open, and the liquid flows out from the through hole 11a to the discharge hole 4b. Then, the liquid is discharged from the discharge port 4 a through the discharge pipe 4.

  The O-ring 8b prevents liquid leakage between the suction hole 3b and the plate 9, and prevents liquid leakage between the discharge hole 4b and the plate 9. Further, the element mounting rubber 8 a prevents liquid leakage from the pump chamber 15.

  Further, by sandwiching a damper rubber 8 between the piezoelectric element 7 and the cover 5 and an element mounting rubber 8a between the piezoelectric element 7 and the plate 9, the impact on the outer peripheral portion of the piezoelectric element 7 is reduced, and the position and operation are stabilized. ing.

  FIG. 9 is a plan view of a thin water-cooled pump plate according to the present invention. The plate 9 is a bottom plate of the pump chamber 15, and the disk 9a as a main body is obtained by processing a thin circular plate made of metal.

  In the disk 9a, a suction-side through hole 11 is formed in accordance with the position of the suction hole 3b, and a discharge-side through hole 11a is formed in accordance with the position of the discharge hole 4b. The retaining hole 9b is a hole for attaching to the base 2 with the retaining member 6b.

  A suction-side check valve 10 is attached to the suction-side through hole 11. The check valve 10 is attached to the surface opposite to the suction hole 3 b with respect to the through hole 11, and controls the liquid to flow only from the suction hole 3 b to the pump chamber 15.

  A discharge-side check valve 10a is attached to the discharge-side through hole 11a. The check valve 10a is attached to the surface on the same side as the discharge hole 4b with respect to the through hole 11a, and controls the liquid to flow only from the pump chamber 15 toward the discharge hole 4b.

  The check valve 10 on the suction side is fixed to the disk 9a by caulking one end with a rivet 14, and closes the through-hole 11 on the suction side at the other end. The discharge-side check valve 10a is fixed to the disk 9a by caulking one end with a rivet 14a, and closes the discharge-side through hole 11a at the other end.

  Half piercing 11c is applied to the suction side through hole 11 and half piercing 11d is applied to the discharge side through hole 11a. Further, the disc 9a is provided with a dust discharge groove 12 and a rectifying protrusion 13 on the suction side, and a dust discharge groove 12a and a rectifying protrusion 13a on the discharge side.

  The check valves 10 and 10a are shown in FIGS. 10 to 13, the half piercings 11c and 11d are shown in FIG. 14, and the dust discharge grooves 12 and 12a are shown in FIG. Will be described in detail with reference to FIG.

  FIG. 10 is a view showing a case where the check valve of the thin water-cooled pump according to the present invention is folded at the position of the retaining hole. FIG. 11 is a view when the check valve of the thin water-cooled pump according to the present invention is bent at the position of the retaining hole without making a crease. FIG. 12 is a view showing a case where the check valve of the thin water-cooled pump according to the present invention is folded on the end side from the retaining hole. The same applies to the check valve 10 on the suction side and the check valve 10a on the discharge side.

  The check valve 10 has a valve structure using a leaf spring 16. The leaf spring 16 is a thin metal plate, a retaining hole 16a for allowing the rivet 14 to pass through is formed on the fixed side, and the valve side has an arc shape in accordance with the shape of the through hole 11.

  The leaf spring 16 has a convex shape with a fold 16b at the position of the retaining hole 16a with a crease 16b. However, as an application example, the leaf spring 16 is provided with a curved portion 16c instead of the fold 16b, There are those with 16b.

  The upper part of FIG. 10 is a plan view showing the check valve 10 mentioned as the first example, and the lower part of FIG. 10 is a cross-sectional view taken along the line FF of the plan view. In the first example, a crease 16b is formed by mountain folds at the position of the retaining hole 16a.

  The upper part of FIG. 11 is a plan view showing the check valve 10 mentioned as the second example, and the lower part of FIG. 11 is a cross-sectional view taken along line GG of the plan view. In the second example, the curved portion 16c is provided in a gentle mountain shape without breaking at the position of the retaining hole 16a.

  The upper part of FIG. 12 is a plan view showing the check valve 10 mentioned as the third example, and the lower part of FIG. 10 is a cross-sectional view taken along the line H-H in the plan view. In the third example, a crease 16b is formed by mountain folds on the end side from the retaining hole 16a.

  By making the check valve 10 not a rubber material but a metal material or a plastic material, the check valve 10 is hardly deteriorated and the life is extended. Moreover, it becomes easy to form the fold 16b and the curved part 16c. Since the spring also has an elastic force and the discharge pressure becomes high, the frequency characteristic of the pump is good and a stable flow rate can be obtained.

  FIG. 13 is a view showing the structure of a check valve of the thin water-cooled pump according to the present invention. FIG. 13 is a cross-sectional view taken along the line DD in FIG. 9, and the upper part shows before the check valve 10 is attached, and the lower part shows after the check valve 10 is attached.

  In the check valve structure of the present invention, the leaf spring 16 of the check valve 10, 10 a is bent or bent so that the leaf spring 16 is convex with respect to the plate 9. The holes 11 and 11a are in close contact with each other.

  The retaining hole 16a of the check valve 10 is put together on the retaining hole 9c opened in the disc 9a of the plate 9, and the rivet 14 is penetrated from above with respect to the retaining hole 9c and the retaining hole 16a. Clamp the bottom side and fix it.

  As shown in the upper part of FIG. 17, when the plate valve 17a on the plate 17 is made of a rubber material, the liquid passes through the through hole 11 and the plate valve 17a repeats reciprocating movement, so that the plate valve 17a near the through hole 11 of the plate valve 17a. Wear may occur, the plate valve 17a may not completely block the through hole 11, and a backflow may occur.

  The leaf spring 16 of the check valve 10 is previously provided with a fold 16b or a curved portion 16c so as to have a convex shape, so that the protruding portion is pushed when the rivet 14 is caulked, so that the leaf spring 16 enters the through hole 11. It is in close contact, and it is difficult to warp in a concave shape because it is convex.

  FIG. 14 is a view showing the structure of the through hole of the plate of the thin water-cooled pump according to the present invention. In addition, the upper stage is a sectional view cut along DD in FIG. 9, and the lower stage is a sectional view cut along EE in FIG. Moreover, FIG. 18 is a figure which shows the structure of the through-hole of the plate of the conventional pump.

  The through-hole structure of the present invention has a non-return function by punching through-holes 11 and 11a in the plate 9 and then pressing the half-piercings 11c and 11d around the through-holes 11 and 11a from the valve mounting side. The burrs of the through holes 11 and 11a are prevented from contacting the valves 10 and 10a.

  As shown in FIG. 18, when the through-hole 11 is formed in the plate 17 by punching, a burr 11 b may be generated at the edge of the through-hole 11 to form irregularities. When the protruding part of the burr 11b hits, the plate valve 17a does not completely block the through hole 11.

  After opening the through holes 11 and 11a in the disk 9a of the plate 9 by punching, the burrs 11b can be depressed by applying half piercings 11c and 11d around the through holes 11 and 11a from the valve mounting side. . The half piercing is a pressing process in which a protrusion or a groove is formed by pressing only half without forming a hole.

  That is, after punching the through-holes 11 and 11a in the disc 9a, if a step is provided by half-sinking from the valve mounting side in a shape slightly larger than the through-holes 11 and 11a, the burr 11b of the through-holes 11 and 11a The check valves 10 and 10a are not hit, and the through holes 11 and 11a can be completely blocked. As a result, there is no backflow, and a stable flow rate with good frequency characteristics can be obtained.

  If punching is performed from the valve mounting side, the burr 11b can be formed on the opposite side, so the half piercings 11c and 11d are not necessary. However, if the punching direction is not clear, the half piercings 11c and 11d may be in either direction. Therefore, the mold structure can have a degree of freedom.

  FIG. 15 is a view showing the structure of the dust discharge groove of the plate of the thin water-cooled pump according to the present invention. 15 is a cross-sectional view taken along the line DD in FIG. 9, and the lower part of FIG. 15 is a plan view of the check valve 10. FIG. 19 is a diagram showing the structure of a disk of a conventional pump plate.

  In the dust clogging prevention structure of the present invention, 12, 12a is provided between the through holes 11 and 11a of the plate 9 and the check valves 10 and 10a, and the dust discharge groove is provided between the plate 9 and the check valves 10 and 10a. The garbage 17c sandwiched between the two can be discharged.

  As shown in FIG. 19, every time the plate valve 17 a is opened when liquid is passed through the through hole 11, dust 17 c mixed in the liquid is sandwiched between the plate valve 17 a and the plate 17, resulting in poor sealing performance. There is.

  A dust discharge groove 12 is provided between the through hole 11 of the plate 9 and the rivet 14 that fixes the check valve 10 to the plate 9. Examples of means for forming the dust discharge groove 12 include press working and half piercing. The plate 9 can be made of plastic, and in the case of plastic, the dust discharge groove 12 is provided by resin molding or the like.

  The width of the check valve 10 is longer than the check valve 10 so that the dust 17c can be discharged from the side of the check valve 10. However, it is necessary to provide a length that allows the dust 17c to be discharged without collecting in the dust discharge groove 12 itself.

  Even if the dust 17c is caught between the check valve 10 and the disc 9a of the plate 9, it can be discharged if the dust 17c reaches the dust discharge groove 12. The presence of the dust discharge groove 12 prevents the dust 17c from being pinched by the spring force of the check valve 10 and maintains the sealing performance of the through hole 11.

  FIG. 16 is a view showing the structure of the rectifying protrusion of the plate of the thin water-cooled pump according to the present invention. The upper part of FIG. 16 is a plan view of the plate 9, and the lower part of FIG. 16 is a cross-sectional view taken along II in the plan view. Moreover, FIG. 20 is a figure which shows the flow of the liquid of the plate of the conventional pump.

  The gas venting structure of the present invention is provided with rectifying projections 13 and 13a on the plate 9, and controls the flow of liquid in the pump chamber 15 from the suction side to the discharge side, thereby increasing the liquid flow velocity and mixing in the liquid. The gas 17d thus discharged can be discharged.

  As shown in FIG. 20, the liquid that has flowed in from the suction-side through hole 11 on the plate 17 flows toward the discharge-side through hole 11a. There is a possibility that a portion where the gas easily flows and a region where it is difficult to flow are generated, and the gas 17d or the like mixed in the liquid is accumulated in the region where it is difficult to flow, thereby reducing the performance of the pump.

  A rectifying protrusion 13 and a rectifying protrusion 13a are provided on the disk 9a of the plate 9 to control the flow not to be dispersed. For example, a reverse J-shaped rectifying protrusion 13 is raised at the upper left of the suction-side check valve 10, and a J-shaped rectifying protrusion 13 a is raised at the lower right of the discharge-side check valve 10 a for inhalation. A substantially S-shaped flow path is formed from the through-hole 11 on the side to the through-hole 11a on the discharge side.

  The rectifying protrusions 13 are means capable of forming protrusions on the disk 9a, such as forming protrusions by pressing, forming protrusions by half piercing, bonding the protrusions to the disk 9a, or resin molding. Provided. Further, any shape other than the J-shape can be used as long as the flow can be controlled.

  By making the flow almost constant without being dispersed, the flow velocity can be increased and the flow is vigorous, so that the gas 17d and the like mixed in the liquid can also flow together. The liquid flow rate is also constant, and the pump performance is stable.

  As described above, in the thin water-cooled pump according to the present invention, the fixed leaf spring is in close contact with the through hole by making a crease in the vicinity of the retaining hole position of the metal leaf spring and making it convex with respect to the through hole. Thus, the through hole can be tightly sealed, and the operation of the pump is stabilized.

  In addition, by punching the plate in the pump chamber by punching and then pressing the surroundings of the through hole with half piercing, the burr generated by punching is prevented from coming into contact with the leaf spring. The sealing performance of the holes can be improved.

  Further, by providing a dust discharge groove between the through hole and the retaining hole of the plate, it becomes possible to discharge dust sandwiched between the plate and the leaf spring, and the sealing performance of the through hole is improved.

  In addition, by providing a flow straightening protrusion on the plate to control the flow of the liquid, the flow rate of the liquid is increased and the mixed gas can be discharged, so that the flow rate of the pump is stabilized.

It is a perspective view of the thin water cooling pump which is the present invention. It is a top view of the thin water cooling pump which is the present invention. It is a top view in the state where the cover of the thin water cooling pump which is the present invention was removed. It is a top view of the state which removed the piezoelectric element of the thin water cooling pump which is this invention. It is a top view of the state which removed the plate of the thin water cooling pump which is this invention. It is sectional drawing cut | disconnected by AA of FIG. 2 of the thin water cooling pump which is this invention. It is sectional drawing cut | disconnected by BB of FIG. 2 of the thin water cooling pump which is this invention. It is sectional drawing cut | disconnected by CC of FIG. 2 of the thin water cooling pump which is this invention. It is a top view of the plate of the thin water cooling pump which is this invention. It is a figure at the time of making a crease in the position of a retaining hole in the non-return valve of the thin water cooling pump which is the present invention. It is a figure at the time of making it curve in the position of a retaining hole, without making a crease in the check valve of the thin water cooling pump which is this invention. It is a figure at the time of making a crease on the check valve of the thin water cooling pump which is the present invention on the end side from the retaining hole. It is a figure which shows the structure of the non-return valve of the thin water cooling pump which is this invention. It is a figure which shows the structure of the through-hole of the plate of the thin water cooling pump which is this invention. It is a figure which shows the structure of the dust discharge groove | channel of the plate of the thin water cooling pump which is this invention. It is a figure which shows the structure of the processus | protrusion for rectification | straightening of the plate of the thin water cooling pump which is this invention. It is a figure which shows the structure of the check valve of the conventional pump. It is a figure which shows the structure of the through-hole of the plate of the conventional pump. It is a figure which shows the structure of the disc of the plate of the conventional pump. It is a figure which shows the flow of the liquid of the plate of the conventional pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thin water cooling pump 2 Base 2a Mounting hole 2b Protruding part 2c Recessed part 2d Retaining hole 2e Retaining hole 3 Suction pipe 3a Suction port 3b Suction hole 4 Discharge pipe 4a Discharge port 4b Discharge hole 5 Cover 5a Cover part 5b Edge part 5c Retaining hole 6 Electric wire 6a Retaining tool 6b Retaining tool 7 Piezoelectric element 7a Connection part 8 Damper rubber 8a Element mounting rubber 8b O-ring 9 Plate 9a Disc 9b Retaining hole 9c Retaining hole 10 Check valve 10a Check valve 11 Through hole 11a Through hole 11b Burr 11c Half piercing 11d Half piercing 12 Dust discharging groove 12a Dust discharging groove 13 Rectification projection 13a Rectification projection 14 Rivet 14a Rivet 15 Pump chamber 16 Leaf spring 16a Retaining hole 16b Crease 16c Bending portion 17 Plate 17a Plate valve 17c Umbrella valve 17c 17d gas

Claims (4)

  A thin pump base having a suction pipe for receiving liquid and a discharge pipe for discharging liquid; a bottom plate of a pump chamber placed on the pump base; a through hole for passing liquid from the suction pipe to the pump chamber; and a discharge pipe from the pump chamber to the discharge pipe A plate having a through-hole for allowing liquid to pass through, a suction-side check valve for controlling the flow of liquid in one direction by attaching a leaf spring to the upper surface of the through-hole on the suction side of the plate, and a through-hole on the discharge side of the plate A discharge-side check valve for controlling the flow of liquid in one direction by attaching a leaf spring to the lower surface of the piezoelectric element, a piezoelectric element that sucks and sends liquid into the pump chamber by vibrating on the upper side of the plate, the plate and An annular element mounting rubber which is sandwiched between the piezoelectric elements and seals the pump chamber, a cover which covers the pump base containing the plate and the piezoelectric elements, and a sandwich between the piezoelectric elements and the cover It consists of an annular damper rubber that is an impact material, and the attached leaf spring is made into a through hole by creasing the leaf spring of the check valve or by bending the leaf spring to make it convex with respect to the plate. A thin water-cooled pump characterized by having a check valve structure in close contact.   A through-hole structure in which the burr of the through-hole is prevented from contacting the check valve by pressing the periphery of the through-hole with a half piercing from the side where the valve is attached after punching a through-hole in the plate The thin water-cooled pump according to claim 1, wherein   The dust clogging prevention structure is provided between the through hole of the plate and the mounting position of the check valve so that the dust caught between the plate and the check valve can be discharged. 2. A thin water-cooled pump according to 2.   Providing a rectifying protrusion on the plate and controlling the flow of liquid from the suction side to the discharge side in the pump chamber to increase the flow rate of the liquid and provide a gas vent structure that can discharge the gas mixed in the liquid The thin water-cooled pump according to claim 1, wherein:

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