TW202310935A - Fluid controlling device and glue dispensing device - Google Patents

Abstract

The present invention discloses a fluid controlling device and a glue dispensing device using the same. The fluid controlling device includes a pump body, at least one piezoelectric structure and at least two flexible printed circuit boards, wherein the pump body has a pump chamber therein. The piezoelectric structure is located in the pump chamber and fixed on the side wall of the pump body through a glue. The flexible printed circuit board is located in the pump chamber and is arranged on the piezoelectric structure. When the flexible printed circuit boards apply a negative voltage to the piezoelectric structure, the volume of the piezoelectric structure shrinks to attract fluid into the pump chamber. When the flexible printed circuit boards apply a positive voltage to the piezoelectric structure, the volume of the piezoelectric structure expands to discharge the fluid from the pump chamber to outside. The fluid controlling device uses the expansion and contraction of the piezoelectric structure to precisely control the discharging quantity of the fluid.

Description

Fluid control device and its dispensing device

The invention relates to a fluid control technology, and in particular to a fluid control device and a dispensing device thereof.

With the advancement of science and technology, the technology of the display is also constantly developing. Light, thin, short, and small flat-panel displays have replaced traditional heavy cathode picture tube displays. There are many types of flat panel display devices, and common flat panel display devices include liquid crystal display devices, organic light emitting diode display devices, light emitting diode display devices, and micro light emitting diode devices. Today, display devices are no longer limited to flat surfaces, and thin and light curved displays are also booming.

In a curved display, it is usually necessary to use an iron frame to deform the display module, and then use frame glue to attach the iron frame to the cover, and the area surrounded by the frame glue between the display module and the cover Liquid optical glue with high optical penetration is poured inside to enhance the structural strength of the display. Now the precision electronics industry widely uses the dispensing process, and the glue output is controlled by the magnetic valve to squeeze the glue out of the cylinder to achieve the purpose of dispensing. This method is to control the glue amount by calculating the gas flow rate, and the accuracy of the glue output Low, resulting in water ripples, poor coverage of dispensing lead to line corrosion and other undesirable problems.

Therefore, the present invention aims at addressing the above problems, and proposes a fluid control device and a dispensing device thereof, so as to solve the conventional problems.

The present invention provides a fluid control device and a dispensing device thereof, which have the characteristics of low noise, small size, quantifiable volume of discharged fluid, and environmental protection, can accurately control the amount of glue output, and improve the shortcomings of traditional dispensing.

In one embodiment of the present invention, a fluid control device includes a pump body, at least one piezoelectric structure, and at least two flexible printed circuit boards. There is a pump chamber inside the pump body, the side wall of the pump body has a first opening and a second opening connected to the pump chamber, an inlet valve and an outlet valve are arranged on the side wall of the pump body, and the inlet valve and the outlet valve respectively close the first opening with a second opening. The piezoelectric structure is located in the pump chamber and is fixed on the side wall of the pump body by glue. A flexible printed circuit board is located in the pump chamber and rests on the piezoelectric structure. When the flexible printed circuit board applies a negative voltage to the piezoelectric structure, the volume of the piezoelectric structure will shrink to attract fluid to push the inlet valve open and enter the pump chamber, and the fluid pushes the inlet valve open, and the outlet valve closes the second opening . When the flexible printed circuit board applies a positive voltage to the piezoelectric structure, the volume of the piezoelectric structure will expand to push the fluid out of the outlet valve and discharge from the pump chamber, and the inlet valve closes the first opening.

In one embodiment of the present invention, the piezoelectric structure is a shear piezoelectric structure.

In one embodiment of the present invention, at least one piezoelectric structure includes a first piezoelectric structure and a second piezoelectric structure, both of the first piezoelectric structure and the second piezoelectric structure are cuboids when zero voltage is applied, and the second piezoelectric structure Each of a piezoelectric structure and a second piezoelectric structure has a first surface and a second surface opposite to each other, and at least two flexible printed circuit boards include a first flexible printed circuit board and two second flexible printed circuit boards , the first flexible printed circuit board is located between the first piezoelectric structure and the first surface of the second piezoelectric structure, and the two second flexible printed circuit boards are respectively located on the second surface of the first piezoelectric structure and the second piezoelectric structure. On the surface, two second flexible printed circuit boards are fixed on the side wall of the pump body through glue.

In an embodiment of the present invention, both the first piezoelectric structure and the second piezoelectric structure are trapezoidal when a positive voltage or a negative voltage is applied thereto.

In one embodiment of the present invention, the length of the cuboid is 75-100 mm, the width is 25-30 mm, and the height is 0.2-10 mm.

In an embodiment of the present invention, a dispensing device includes a pump body, at least one piezoelectric structure, a container, an input rubber hose, an output rubber hose, and at least two flexible printed circuit boards. There is a pump chamber inside the pump body, and the piezoelectric structure is located in the pump chamber and fixed on the side wall of the pump body through glue. A colloid is accommodated inside the container, and the container has a ventilation hole. One end of the input hose is immersed in the colloid, and the other end runs through the pump body to communicate with the pump chamber. One end of the output hose runs through the pump body to communicate with the pump chamber. A flexible printed circuit board is located in the pump chamber and rests on the piezoelectric structure. When the flexible printed circuit board applies a negative voltage to the piezoelectric structure, the volume of the piezoelectric structure will shrink, so that the fluid can be sucked into the pump chamber through the input hose. When the flexible printed circuit board applies a positive voltage to the piezoelectric structure, the volume of the piezoelectric structure will expand to discharge the colloid through the output hose.

In one embodiment of the present invention, the piezoelectric structure is a shear piezoelectric structure.

In one embodiment of the present invention, at least one piezoelectric structure includes a first piezoelectric structure and a second piezoelectric structure, both of the first piezoelectric structure and the second piezoelectric structure are cuboids when zero voltage is applied, and the second piezoelectric structure Each of a piezoelectric structure and a second piezoelectric structure has a first surface and a second surface opposite to each other, and at least two flexible printed circuit boards include a first flexible printed circuit board and two second flexible printed circuit boards , the first flexible printed circuit board is located between the first piezoelectric structure and the first surface of the second piezoelectric structure, and the two second flexible printed circuit boards are respectively located on the second surface of the first piezoelectric structure and the second piezoelectric structure. On the surface, two second flexible printed circuit boards are fixed on the side wall of the pump body through glue.

In an embodiment of the present invention, both the first piezoelectric structure and the second piezoelectric structure are trapezoidal when a positive voltage or a negative voltage is applied thereto.

In one embodiment of the present invention, the length of the cuboid is 75-100 mm, the width is 25-30 mm, and the height is 0.2-10 mm.

Based on the above, the fluid control device and its dispensing device use a piezoelectric structure to control the suction and discharge of the fluid. It has the characteristics of low noise, small size, quantifiable volume of the discharged fluid, and environmental protection. It can accurately control the amount of glue, and improve the traditional Disadvantages of dispensing.

In order to make your review committee members have a further understanding and understanding of the structural features and the achieved effects of the present invention, I would like to provide a better embodiment diagram and a detailed description, as follows:

Embodiments of the present invention will be further explained in conjunction with related figures below. Wherever possible, the same reference numerals have been used throughout the drawings and description to refer to the same or similar components. In the drawings, the shape and thickness may be exaggerated for the sake of simplification and convenient labeling. It should be understood that elements not particularly shown in the drawings or described in the specification are forms known to those skilled in the art. Those skilled in the art can make various changes and modifications according to the content of the present invention.

When an element is referred to as being "on", it can generally mean that the element is directly on other elements, or there may be other elements present in between. Conversely, when an element is referred to as being "directly on" another element, it cannot have the other element in between. As used herein, the word "and/or" includes any combination of one or more of the associated listed items.

The following descriptions of "one embodiment" or "an embodiment" refer to at least one specific element, structure or feature associated with one embodiment. Therefore, multiple descriptions of "one embodiment" or "an embodiment" appearing in various places below do not refer to the same embodiment. Furthermore, specific components, structures and features in one or more embodiments may be combined in an appropriate manner.

The disclosure is particularly described with the following examples, which are for illustration only, since various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the disclosure, and therefore this The scope of protection of the disclosed content shall be subject to the definition of the appended patent application scope. Throughout the specification and claims, the meanings of "a" and "the" include that such description includes "one or at least one" of the element or component, unless the content clearly specifies otherwise. Furthermore, as used in the present disclosure, singular articles also include descriptions of plural elements or components, unless it is obvious from the specific context that the plural is excluded. Also, as applied in this description and all claims below, the meaning of "in" may include "in" and "on" unless the content clearly dictates otherwise. The terms (terms) used throughout the specification and patent claims generally have the ordinary meaning of each term used in this field, in the content of this disclosure and in the specific content, unless otherwise specified. Certain terms used to describe the disclosure are discussed below or elsewhere in this specification to provide practitioners with additional guidance in describing the disclosure. The use of examples anywhere throughout the specification, including examples of any terms discussed herein, is for illustration only and certainly does not limit the scope and meaning of the disclosure or any exemplified term. Likewise, the present disclosure is not limited to the various embodiments presented in this specification.

It will be understood that the terms "comprising", "including", "having", "containing", "involving", etc. as used herein are open-ended The (open-ended) means including but not limited to. In addition, any embodiment or scope of claims of the present invention does not necessarily achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and title are only used to assist in the search of patent documents, and are not used to limit the scope of patent applications for inventions.

The terms "substantially", "around", "about" or "approximately" as used herein shall generally mean within 20% of a given value or range, Preferably within 10%. Furthermore, quantities provided herein may be approximate, thus meaning that the words "about", "about" or "approximately" may be used unless otherwise stated. When a quantity, concentration, or other value or parameter has a specified range, preferred range, or tabulated upper and lower ideal values, it shall be deemed to specifically disclose all ranges formed by any pair of upper and lower limits or ideal values, regardless of Whether the areas are disclosed separately. For example, if a certain length of the disclosed range is X centimeters to Y centimeters, it should be deemed that the disclosed length is H centimeters and H can be any real number between X and Y.

In addition, if the term "electrical (sexual) coupling" or "electrical (sexual) connection" is used herein, it includes any direct and indirect electrical connection means. For example, if it is described that a first device is electrically coupled to a second device, it means that the first device can be directly connected to the second device, or indirectly connected to the second device through other devices or connection means. device. In addition, if you describe the transmission and provision of electrical signals, those familiar with the art should be able to understand that the transmission of electrical signals may be accompanied by attenuation or other non-ideal changes, but if the source and receiver of electrical signal transmission or provision are not special In essence, it should be regarded as the same signal. For example, if an electrical signal S is transmitted (or provided) from terminal A of the electronic circuit to terminal B of the electronic circuit, it may pass through the source and drain terminals of a transistor switch and/or possible stray capacitance. A voltage drop is generated, but if the purpose of this design is not to deliberately use the attenuation or other non-ideal changes generated during transmission (or provision) to achieve certain specific technical effects, the electrical signal S is between the terminal A and the terminal of the electronic circuit. B should be considered as substantially the same signal.

Unless otherwise specified, some conditional sentences or words, such as "can (can)", "maybe (could)", "maybe (might)", or "may" are usually intended to express that the embodiments of the present case have, However, it may also be interpreted as a feature, element, or step that may not be required. In other embodiments, these features, elements, or steps may not be required.

A fluid control device and its dispensing device of the present invention will be proposed below. It uses a piezoelectric structure to control the suction and discharge of fluid. It has the characteristics of low noise, small volume, quantifiable volume of discharged fluid and environmental protection. Glue volume, and improve the shortcomings of traditional dispensing.

Figure 1 is a schematic structural view of the fluid control device of the first embodiment of the present invention, Figure 2 is a schematic structural view of the fluid control device of the first embodiment of the present invention when sucking fluid, and Figure 3 is the first embodiment of the present invention Schematic diagram of the structure of a fluid control device in an embodiment when discharging fluid. Please refer to FIG. 1, FIG. 2 and FIG. 3, the fluid control device 1 of the first embodiment of the present invention is introduced below. The fluid control device 1 includes a pump body 10 , at least one piezoelectric structure 11 and at least two flexible printed circuit boards 12 , wherein the piezoelectric structure 11 is made of ceramics, but the present invention is not limited thereto. For convenience and clarity, one piezoelectric structure 11 is taken as an example, and two flexible printed circuit boards 12 are taken as an example, but the present invention is not limited thereto. The inside of the pump body 10 has a pump chamber 100, the side wall of the pump body 10 has a first opening 101 and a second opening 102 communicating with the pump chamber 100, the side wall of the pump body 10 is provided with an inlet valve 13 and an outlet valve 14, wherein the inlet The valve 13 and the outlet valve 14 close the first opening 101 and the second opening 102 respectively, and both the inlet valve 13 and the outlet valve 14 are one-way valves. The piezoelectric structure 11 is located in the pump chamber 100 and fixed on the side wall of the pump body 10 through glue 15 . Two flexible printed circuit boards 12 are located in the pump chamber 100 and are arranged on the piezoelectric structure 11 . In some embodiments of the present invention, the flexible printed circuit board 12 can be fixed on the side wall of the pump body 10 through the adhesive 15 .

The two flexible printed circuit boards 12 are further electrically connected to a driving circuit 16 . As shown in Figure 2, when the drive circuit 16 applies a negative voltage to the piezoelectric structure 11 using two flexible printed circuit boards 12, the volume of the piezoelectric structure 11 will shrink, making the gas pressure in the pump chamber 100 lower than that of the external air pressure to attract fluid to push open the inlet valve 13 and enter the pump chamber 100 , and the outlet valve 14 closes the second opening 102 . This fluid can be a liquid or a gas. In addition, in order to avoid affecting the fixity of the piezoelectric structure 11 , the flexible printed circuit board 12 fixed on the adhesive 15 can be applied with a ground voltage GND to avoid deformation of the piezoelectric structure 11 close to the adhesive 15 . As shown in Figure 3, when the drive circuit 16 uses two flexible printed circuit boards 12 to apply a positive voltage to the piezoelectric structure 11, the volume of the piezoelectric structure 11 will expand to push the fluid away from the outlet valve 14, and from The pump chamber 100 is discharged, and the inlet valve 13 closes the first opening 101 . Likewise, the flexible printed circuit board 12 fixed on the adhesive 15 can be applied with a ground voltage GND to avoid deformation of the piezoelectric structure 11 close to the adhesive 15 . Since the piezoelectric structure 11 has low noise during deformation, and the deformation is small and quantifiable, and the piezoelectric material is an environmentally friendly material, so the fluid discharge can be accurately controlled.

Fig. 4 is a structural perspective view of a piezoelectric structure according to an embodiment of the present invention. The piezoelectric structure 11 may be a shear piezoelectric structure, but the present invention is not limited thereto. As shown in FIG. 4 , the piezoelectric structure 11 is a rectangular parallelepiped when zero voltage is applied, and a trapezoid when positive or negative voltage is applied to the piezoelectric structure 11 . Since the piezoelectric structure 11 is a shear piezoelectric structure, also a cuboid, the length L of the piezoelectric structure 11 is much greater than the width W, and the width W is much greater than the height H of the piezoelectric structure 11 . Specifically, the length L of the cuboid is 75-100 mm, the width W is 25-30 mm, and the height H is 0.2-10 mm, but the present invention is not limited thereto. Assuming that the bottom surface of the cuboid of the piezoelectric structure 11 is applied with the ground voltage GND, it means that the top surface of the piezoelectric structure 11 will be deformed. When the piezoelectric structure 11 expands, the length L of the top surface of the piezoelectric structure 11 will increase by 2ΔL. At this time, the volume of the piezoelectric structure 11 is (L+ΔL)×W×H, where ΔL=V×d , V represents the voltage drop on the piezoelectric structure 11, and d represents the piezoelectric coefficient of the piezoelectric structure 11. When the piezoelectric structure 11 shrinks, the length L of the top surface of the piezoelectric structure 11 will decrease by 2ΔL, and the volume of the piezoelectric structure 11 at this time is (L−ΔL)×W×H. It can be known from the above calculation that when a piezoelectric structure 11 undergoes one contraction and one expansion, the volume of fluid that can be discharged is 2ΔL×W×H.

Fig. 5 is a schematic structural view of a fluid control device according to a second embodiment of the present invention. Fig. 6 is a schematic structural view of the fluid control device of the second embodiment of the present invention when sucking fluid. Fig. 7 is a schematic structural view of the fluid control device according to the second embodiment of the present invention when discharging fluid. Please refer to FIG. 5, FIG. 6 and FIG. 7, the fluid control device 1 of the second embodiment of the present invention is introduced below. The fluid control device 1 includes a pump body 10, a first piezoelectric structure 11_1, a second piezoelectric structure 11_2, a first flexible printed circuit board 12_1 and two second flexible printed circuit boards 12_2, wherein the first piezoelectric The materials of the structure 11_1 and the second piezoelectric structure 11_2 are ceramics as an example, but the present invention is not limited thereto. The inside of the pump body 10 has a pump chamber 100, the side wall of the pump body 10 has a first opening 101 and a second opening 102 communicating with the pump chamber 100, the side wall of the pump body 10 is provided with an inlet valve 13 and an outlet valve 14, wherein the inlet The valve 13 and the outlet valve 14 close the first opening 101 and the second opening 102 respectively, and both the inlet valve 13 and the outlet valve 14 are one-way valves. The first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 are located in the pump chamber 100 and fixed on the side wall of the pump body 10 through the adhesive 15 . Since the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 are rectangular parallelepipeds when zero voltage is applied, each of the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 has a first surface and a first surface opposite to each other. Two surfaces. Both the first flexible printed circuit board 12_1 and the two second flexible printed circuit boards 12_2 are located in the pump chamber 100 . The first flexible printed circuit board 12_1 is located between the first surface of the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2, and the two second flexible printed circuit boards 12_2 are respectively located between the first piezoelectric structure 11_1 and the second piezoelectric structure 11_1. On the second surface of the structure 11_2 , two second flexible printed circuit boards 11_2 are fixed on the side wall of the pump body 10 through the adhesive 15 .

The first flexible printed circuit board 12_1 and the two second flexible printed circuit boards 12_2 are further electrically connected to a driving circuit 16 . As shown in FIG. 6, when the driving circuit 16 uses the first flexible printed circuit board 12_1 and the two second flexible printed circuit boards 12_2 to apply a negative voltage to the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2, the second The volume of the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 will shrink, so that the gas pressure in the pump chamber 100 is lower than the external gas pressure, so as to attract fluid to push the inlet valve 13 and enter the pump chamber 100, and the outlet valve 14 The second opening 102 is closed. This fluid can be a liquid or a gas. In addition, in order to avoid affecting the fixation of the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2, the second flexible printed circuit board 12_2 fixed on the adhesive 15 can be applied with a ground voltage GND, so as to avoid the first piezoelectric structure 11_2 close to the adhesive 15. A piezoelectric structure 11_1 and a second piezoelectric structure 11_2 are deformed. As shown in FIG. 7, when the driving circuit 16 uses the first flexible printed circuit board 12_1 and the two second flexible printed circuit boards 12_2 to apply a positive voltage to the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2, the second The volumes of the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 will expand to push the fluid out of the outlet valve 14 to be discharged from the pump chamber 100 , and the inlet valve 13 closes the first opening 101 . Similarly, the second flexible printed circuit board 12_2 fixed on the adhesive 15 can be applied with the ground voltage GND to avoid deformation of the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 close to the adhesive 15 . Since the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 have low noise during deformation, and the deformation is small and quantifiable, and the piezoelectric material is an environmentally friendly material, so the fluid discharge volume can be precisely controlled.

Please refer to FIG. 5 and FIG. 4, since the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 are the same in material, volume and shape as the piezoelectric structure in the first embodiment, the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 are rectangular parallelepiped when zero voltage is applied, and trapezoidal when the first piezoelectric structure 11_1 and the second piezoelectric structure 11_2 are applied positive or negative voltage, so compared with the first embodiment, After one contraction and one expansion, the volume of fluid that can be discharged is 4△L×W×H.

Fig. 8 is a schematic structural view of a dispensing device according to an embodiment of the present invention. Fig. 9 is a schematic structural view of a dispensing device according to an embodiment of the present invention when fluid is sucked in. Fig. 10 is a schematic structural view of a dispensing device according to an embodiment of the present invention when discharging fluid. Please refer to FIG. 8, FIG. 9 and FIG. 10, the dispensing device 2 of an embodiment of the present invention is introduced below. The dispensing device 2 includes a pump body 20 , at least one piezoelectric structure, a container 22 , an input hose 23 , an output hose 24 and at least two flexible printed circuit boards. The dispensing device 2 uses two piezoelectric structures, namely a first piezoelectric structure 21_1 and a second piezoelectric structure 21_2 . The dispensing device 2 uses three flexible printed circuit boards, that is, a first flexible printed circuit board 25_1 and two second flexible printed circuit boards 25_2 . The pump body 20 has a pump chamber 200 inside. The first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 are located in the pump chamber 200 and fixed on the side wall of the pump body 20 through the glue 26 . A colloid 27 is accommodated inside the container 22 , and the container 22 has a vent hole 220 . One end of the input rubber pipe 23 is immersed in the colloid 27 , and the other end passes through the pump body 20 to communicate with the pump chamber 200 . One end of the output hose 24 runs through the pump body 20 to communicate with the pump chamber 200 . The first flexible printed circuit board 25_1 and the second flexible printed circuit board 25_2 are located in the pump chamber 200 . Since the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 are rectangular parallelepipeds when zero voltage is applied, each of the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 has a first surface and a first surface opposite to each other. Two surfaces. The first flexible printed circuit board 25_1 is located between the first surface of the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2, and the two second flexible printed circuit boards 25_2 are respectively located between the first piezoelectric structure 21_1 and the second piezoelectric structure 21_1. On the second surface of the structure 21_2 , two second flexible printed circuit boards 25_2 are fixed on the side wall of the pump body 20 through the adhesive 26 .

The first flexible printed circuit board 25_1 and the two second flexible printed circuit boards 25_2 are further electrically connected to a driving circuit 28 . As shown in FIG. 9, when the driving circuit 28 utilizes the first flexible printed circuit board 25_1 and the two second flexible printed circuit boards 25_2 to apply a negative voltage to the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2, the second piezoelectric structure 21_2 The volume of the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 will shrink, so that the gas pressure in the pump chamber 200 is lower than the external gas pressure, so that the colloid 27 is sucked into the pump chamber 200 through the input rubber tube 23 . In addition, in order to avoid affecting the fixation of the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2, the second flexible printed circuit board 25_2 fixed on the adhesive 26 can be applied with the ground voltage GND, so as to avoid the first piezoelectric structure 21_2 close to the adhesive 26. The first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 are deformed. As shown in FIG. 10, when the drive circuit 28 utilizes the first flexible printed circuit board 25_1 and the two second flexible printed circuit boards 25_2 to apply a positive voltage to the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2, the second The volumes of the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 will expand to discharge the glue 27 from the output glue tube 24 . Similarly, the second flexible printed circuit board 25_2 fixed on the glue 26 can be applied with the ground voltage GND to avoid deformation of the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 close to the glue 26 . Since the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 have low noise during deformation, and the deformation is small and quantifiable, and the piezoelectric material is an environmentally friendly material, so the fluid discharge volume can be precisely controlled.

Please refer to FIG. 8 and FIG. 4, the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 and the piezoelectric structure of the fluid control device are the same in material, volume and shape. The first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 are both cuboids when zero voltage is applied, and the first piezoelectric structure 21_1 and the second piezoelectric structure 21_2 are trapezoidal when positive or negative voltage is applied, so in After one contraction and one expansion, the volume of the expelled colloid 27 is 4ΔL×W×H.

According to the above embodiments, the fluid control device and its dispensing device use a piezoelectric structure to control the suction and discharge of the fluid, which has the characteristics of low noise, small volume, quantifiable volume of the discharged fluid, and environmental protection, and can precisely control the amount of glue output, and Improve the shortcomings of traditional dispensing.

The above is only a preferred embodiment of the present invention, and is not used to limit the scope of the present invention. Therefore, all equal changes and modifications are made according to the shape, structure, characteristics and spirit described in the patent scope of the present invention. , should be included in the patent application scope of the present invention.

1: Fluid control device 10: pump body 100: pump room 101: first opening 102: second opening 11: Piezoelectric structure 11_1: The first piezoelectric structure 11_2: The second piezoelectric structure 12: Flexible printed circuit board 12_1: The first flexible printed circuit board 12_2: Second flexible printed circuit board 13: Inlet valve 14:Exit valve 15: Viscose 16: Drive circuit 2: Dispensing device 20: pump body 200: pump room 21_1: The first piezoelectric structure 21_2: Second piezoelectric structure 22: container 220: ventilation hole 23: Input hose 24: output hose 25_1: The first flexible printed circuit board 25_2: Second flexible printed circuit board 26: Viscose 27: colloid 28: Drive circuit GND: ground voltage L: Length W: width H: height

Fig. 1 is a schematic structural view of a fluid control device according to the first embodiment of the present invention. Fig. 2 is a schematic structural view of the fluid control device of the first embodiment of the present invention when sucking fluid. Fig. 3 is a schematic structural view of the fluid control device according to the first embodiment of the present invention when discharging fluid. Fig. 4 is a structural perspective view of a piezoelectric structure according to an embodiment of the present invention. Fig. 5 is a schematic structural view of a fluid control device according to a second embodiment of the present invention. Fig. 6 is a schematic structural view of the fluid control device of the second embodiment of the present invention when sucking fluid. Fig. 7 is a schematic structural view of the fluid control device according to the second embodiment of the present invention when discharging fluid. Fig. 8 is a schematic structural view of a dispensing device according to an embodiment of the present invention. Fig. 9 is a schematic structural view of a dispensing device according to an embodiment of the present invention when fluid is sucked in. Fig. 10 is a schematic structural view of a dispensing device according to an embodiment of the present invention when discharging fluid.

1: Fluid control device

10: pump body

100: pump room

101: first opening

102: second opening

11: Piezoelectric structure

12: Flexible printed circuit board

13: Inlet valve

14:Exit valve

15: Viscose

Claims (10)

A fluid control device comprising: A pump body has a pump chamber inside, the side wall of the pump body has a first opening and a second opening communicating with the pump chamber, the side wall of the pump body is provided with an inlet valve and an outlet valve, wherein the inlet valve and the outlet valve respectively closes the first opening and the second opening; at least one piezoelectric structure located in the pump chamber and fixed to the side wall of the pump body by adhesive; and At least two flexible printed circuit boards are located in the pump chamber and arranged on the at least one piezoelectric structure, wherein when the at least two flexible printed circuit boards apply a negative voltage to the at least one piezoelectric structure, the at least The volume of a piezoelectric structure will shrink to attract fluid to push the inlet valve and enter the pump chamber, and the outlet valve to close the second opening, and apply a positive voltage to the at least two flexible printed circuit boards. When a piezoelectric structure is on, the volume of the at least one piezoelectric structure expands to push the fluid away from the outlet valve and out of the pump chamber, and the inlet valve closes the first opening. The fluid control device as claimed in claim 1, wherein the at least one piezoelectric structure is a shear piezoelectric structure. The fluid control device as claimed in claim 2, wherein the at least one piezoelectric structure includes a first piezoelectric structure and a second piezoelectric structure, and the first piezoelectric structure and the second piezoelectric structure are applied with zero voltage Each of the first piezoelectric structure and the second piezoelectric structure has a first surface and a second surface opposite to each other, and the at least two flexible printed circuit boards include a first flexible printed circuit board and two second flexible printed circuit boards, the first flexible printed circuit board is located between the first piezoelectric structure and the first surface of the second piezoelectric structure, the two second flexible printed circuit boards are respectively located On the second surface of the first piezoelectric structure and the second piezoelectric structure, the two second flexible printed circuit boards are fixed on the side wall of the pump body through the glue. The fluid control device according to claim 3, wherein both the first piezoelectric structure and the second piezoelectric structure are trapezoidal when a positive voltage or a negative voltage is applied thereto. The fluid control device according to claim 3, wherein the cuboid has a length of 75-100 mm, a width of 25-30 mm, and a height of 0.2-10 mm. A dispensing device comprising: A pump body with a pump chamber inside; At least one piezoelectric structure is located in the pump chamber and fixed to the side wall of the pump body through glue; A container, a colloid is contained inside it, and the container has a ventilation hole; An input hose, one end of which is immersed in the gel, and the other end runs through the pump body to communicate with the pump chamber; An output hose, one end of which runs through the pump body to communicate with the pump chamber; and At least two flexible printed circuit boards are located in the pump chamber and arranged on the at least one piezoelectric structure, wherein when the at least two flexible printed circuit boards apply a negative voltage to the at least one piezoelectric structure, the at least The volume of a piezoelectric structure will shrink to suck the colloid into the pump chamber through the input rubber tube. When the at least two flexible printed circuit boards apply a positive voltage to the at least one piezoelectric structure, the at least one piezoelectric The volume of the structure expands to expel the colloid through the output hose. The dispensing device according to claim 6, wherein the at least one piezoelectric structure is a shear piezoelectric structure. The dispensing device as claimed in claim 7, wherein the at least one piezoelectric structure includes a first piezoelectric structure and a second piezoelectric structure, and zero voltage is applied to the first piezoelectric structure and the second piezoelectric structure Each of the first piezoelectric structure and the second piezoelectric structure has a first surface and a second surface opposite to each other, and the at least two flexible printed circuit boards include a first flexible printed circuit board and two second flexible printed circuit boards, the first flexible printed circuit board is located between the first piezoelectric structure and the first surface of the second piezoelectric structure, the two second flexible printed circuit boards are respectively located On the second surface of the first piezoelectric structure and the second piezoelectric structure, the two second flexible printed circuit boards are fixed on the side wall of the pump body through the glue. The glue dispensing device according to claim 8, wherein the first piezoelectric structure and the second piezoelectric structure are trapezoidal when positive or negative voltage is applied. The dispensing device as described in Claim 8, wherein the cuboid has a length of 75-100 mm, a width of 25-30 mm, and a height of 0.2-10 mm.

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