TW200523490A - Syringe device - Google Patents

Abstract

A syringe device is equipped with a piston (3) constructed to be inserted slidably in a closed-end tube-shaped cylinder (2) having a fluid port (2b) in order to define a sealing space, and is used for a liquid-preparating device having a driving mechanism for making the piston move in the direction of axis thereof. The piston (3) includes a piston rod (3a), an elastically deformable tube-shaped sealing member (6) made of fluororesin containing carbon having an outside diameter size slightly smaller than the inside diameter of the cylinder, a fixing mechanism 4 and 5 for deforming the sealing member and fixing the sealing member 6 to a tip of the piston rod (3a) at a deformed state to the inner wall (2E) of the cylinder (2), So that the sealing space is defined by the deformed sealing member (6).

Description

200523490 (ii) Description of the invention: [Technical field of the invention] The invention relates to a syringe device composed of a cylinder 5 and a piston, which is suitable for a fluid measuring device and the like. BACKGROUND OF THE INVENTION In the past, a liquid regulating device for measuring a fluid (especially a liquid) has been widely used as a component of a syringe device composed of a piston and a cylinder. The liquid regulating device is a device for measuring a predetermined amount of a plurality of liquids. For example, when a dye of a desired color is to be synthesized, it is a device for mixing a plurality of dyes in an arbitrary ratio. The aforementioned liquid regulating device includes a plurality of containers for containing liquids to be measured and a syringe device connected to the containers. In order to measure a predetermined amount of liquids contained in 15 containers, the driving device can be used to meet the measured liquids. The moving range of the amount drives the piston to discharge the liquid measured by the syringe device for mixing. The end of the syringe device used in the aforementioned liquid regulating device has different required properties depending on the use of the device available for its installation. In general, the performance required for syringes such as medical use is to reduce the gap between the cylinder and the piston as much as possible and bring it into an almost completely sealed state to reliably suck and discharge liquid. In addition, the syringe device used in the liquid regulating device attaches importance to the performance that it can be used repeatedly without causing deterioration of the sealing performance caused by abrasion and the like. That is, it is different from a single-use syringe like a medical syringe. In order to ensure the accuracy of the liquid discharge volume, the uniformity of the inner diameter of the cylindrical part must be required (process precision 200523490 accuracy) and friction caused by repeated use. Solution to the resulting deformation (ensure financial stability). Due to the above-mentioned factors, the conventional syringe device mostly uses a syringe device composed of a cylinder and a piston that are processed by the grinding process in the mating part to improve the sealing performance. However, the 'n-glass injection n' is used to completely close the gap of the mating part during the production. The cylinder and the piston must be made in pairs, and they must be used in pairs. Therefore, when using w 卩, only the cylinder or the piston is damaged—the other side must be replaced. 10 15 When using a glass syringe device for the liquid adjustment device, as shown in Figure 14, when the piston 52 moves back and forth in the cylinder 51 as shown by the arrow 71, in order to suppress friction between the two sides, A lubricating / moisturizing injection mechanism 53 for supplying lubricating water% to the surface of the piston K is required. And, at the same time, a drainage mechanism 54 for receiving the supplied lubricating water to drain water to the outside of the device is also needed. Therefore, the cost of the liquid regulating device is raised, and there is also the problem of increasing the size of the liquid regulating device. Further, in order to ensure the tightness of the cylinder 51 and to be as tight as possible, the inner diameter X of the cylinder and the outer diameter Y of the south dense piston between the two are precisely configured to have a relatively large area. Therefore, the closeness makes the piston cylindrical, and constitutes the mating part-the direction in which the piston moves back and forth to move the material slightly from the axial direction of the cylinder 51 ', that is, the cylinder 51 or the piston 52 is caused by squeezing. The problem of breakage. To prevent this, it is necessary to make the operating axis of the piston nearly coincide with the central axis of the cylinder, and require high precision of the moving mechanism of the piston, and also require a high degree of installation accuracy when installing the syringe device on the inspection device. Therefore, the technical problem to be solved by the present invention is to avoid various problems of the above-mentioned glass circle 20 200523490 cylinder and piston, and to provide a syringe device with a new structure for a liquid regulating device. [Summary of the Invention] 5 Summary of the Invention In order to achieve the above-mentioned object, the present invention is constituted as follows. The syringe device of the first aspect of the present invention is used in a liquid regulating device, and includes: a bottomed cylindrical cylinder having a fluid inlet and outlet communicating with a container for storing a liquid to be measured; and, a The piston is inserted into the cylinder and is in a state of 10 sliding possible, and it is in contact with the inner wall of the cylinder, which is used to define a closed space that can contain the fluid sucked in from the fluid inlet and outlet. In addition, the device includes a A driving mechanism for driving the piston in an axial direction, and the piston includes a piston rod having a connecting portion connected to the driving mechanism; a cylindrical sealed member composed of a fluorine-containing polymer compound containing carbon, having a slightly The outer diameter dimension smaller than the inner diameter of the aforementioned 15 cylinder is in a state of being elastically deformable; and, the fixing mechanism is used to deform the aforementioned hermetic member, and imparts potential energy to the inner wall of the aforementioned cylinder to the hermetic member. In the state, the aforementioned sealing member is fixed at the front end of the piston rod inserted into the side of the cylinder; in addition, the aforementioned closed space can be endowed by the aforementioned industry experience It is defined by the closed components of energy. 20 In the above structure, the piston system uses the above-mentioned fluorocarbon-containing polymer compound in a cylindrical shape as the sealing member. Examples of fluorocarbon-containing polymer compounds include carbon fiber powders such as fluororesin and fluororubber, which have characteristics of both abrasion resistance and high adsorption. Fluorocarbon-containing polymer compounds are suitable for those who have mixed powders such as carbon tobacco powder and short carbon fiber with fluororesin. Adding amount 1 200523490 Generally speaking, although 10 to 20% by weight of each product is used, it is not limited to this range. The products to be sold Specifically, the fluorocarbon resin can be widely used to fix the sealing member on the front end of the piston in a state of bearing the potential energy 5 of the fixing mechanism toward the inner wall of the cylinder. In this way, the tightness of the piston and the cylinder is ensured. According to the above-mentioned structure, the durability of the cylinder and the piston can be improved by the abrasion property and high adsorption property possessed by the carbon-containing resin. In addition, by applying potential energy to the closed member toward the inner wall of the cylinder, it is possible to ensure high adhesion with the cylinder, so it is not necessary to form a rod that matches the inner diameter of the cylinder. Therefore, the damage caused by the squeeze produced by using the glass to make the piston: 10 can be solved without the need for higher assembly accuracy and movement accuracy. In addition, the fluorocarbon resin used to form the bifurcated member does not need to be provided with a lubricating water injection mechanism in the fluid device because of its excellent abrasion resistance, and can reduce the cost of the device as a whole and reduce the size of the device. . 15 According to the second aspect of the present invention, the injection aspect of the first aspect can be provided, in addition to the above, the aforementioned fixing mechanism includes: a rod-side mounting member, which is inserted into the cylinder with the front fan The size of the aforementioned sealing member fixed on the front side of the side is approximately the same outer diameter dimension; the front-end side mounting member has a large outer pinch size and is the same as the aforementioned rod-side mounting member, and may be the same as the aforementioned sealing member of the lever-side mounting member; And, the connecting mechanism is used to connect the aforementioned rod-side safety member and the front-end mounting member so that the interval between the aforementioned lever-side mounting member and the front fan + mounting member is slightly shorter than the length dimension of the aforementioned closed member; and, Pulling the above-mentioned rod-side mounting member and the front-end mounting member, the two ends of the closed structure # can be squeezed, so that the closed member expands and deforms to the outside to be in close contact with the inner wall of the cylinder 20 200523490, Thus defining the aforementioned enclosed space. According to a third aspect of the present invention, a syringe device of the second aspect can be provided, wherein the coupling mechanism includes: a screw hole provided in a central portion of the rod-side mounting member; and a screw provided on the front-end side for installation. The central part of the building block. 5 According to the fourth aspect of the present invention, a syringe device of the second aspect can be provided, wherein the fixing mechanism further has a ring-shaped gasket, which is arranged inside the sealed member, and the outer diameter dimension is the same as the inside diameter of the sealed member. Those which are substantially the same and have openings through which the aforementioned linking mechanism can be inserted, and in addition, the aforementioned fixing mechanisms each have a washer holding portion, which is formed to be slightly shorter than 10 facing surfaces of the lever-side mounting member and the front-end mounting member. For the gap of the thickness of the washer, the washer can be expanded and deformed by holding the washer by the washer holding portion, and the sealed member can be squeezed outward by the deformed washer to deform it. According to a fifth aspect of the present invention, a fourth aspect of the syringe device can be provided, in which the washer-holding portions are respectively provided on the front-end side mounting member and the rod-side mounting member 15 and have a diameter approximately the same as that of the aforementioned washer. Round protrusions. According to a sixth aspect of the present invention, a fifth aspect of the syringe device can be provided, wherein the connection mechanism includes: a screw hole, which is provided on the washer holding portion of the rod-side mounting member, and has a diameter equal to the opening of the washer The screw is substantially the same; and the screw extends in a direction perpendicular to the holding surface 20 of the washer-holding portion provided on the front-end-side mounting member, and has a diameter approximately the same as the opening of the washer. According to a seventh aspect of the present invention, a fourth aspect of the syringe device can be provided, wherein the fixing mechanism further includes a washer-retaining protrusion, which is provided concentrically with the washer-holding portion provided on the rod-side mounting member, and can be borrowed. Insert the opening of the washer to hold the washer, and the diameter is substantially the same as the opening. In addition, the above-mentioned fixing machine 200523490 includes and includes: a screw hole provided on the washer holding protrusion, and the diameter is smaller than the opening of the washer; And, the screw extends in a direction perpendicular to the holding surface of the washer holding portion provided on the front-end-side mounting member and has a diameter smaller than the opening of the above-mentioned ring. 5 According to the eighth aspect of the present invention, a second aspect of the syringe device can be provided, which

The aforementioned fixing mechanism further includes: 2 washers arranged inside the sealed member toward the axial direction of the piston, the diameter of which is approximately equal to the inside diameter of the sealed member and has an opening through which the connecting mechanism can be inserted. A washer mounting device, including: a through opening for inserting the aforementioned connecting mechanism; a 10-turn insertion part of the cylindrical pad, whose outer diameter is substantially the same as the opening of each washer; a flange part provided concentrically to the foregoing The space between the inserts of the washers is to separate the two washers mentioned above. The height of the gasket installation tool from the surface of the flange to the end of the insert is slightly smaller than the thickness of the washers. The holding portion is formed on the facing surface 15 of the rod-side mounting member and the front-end mounting member to form a gap slightly shorter than the thickness of the washer between the flange portion and the flange portion. Each washer holding portion and the flange portion on the side mounting member and the front side mounting member can hold each washer so as to expand and deform outward. Each washer may be shaped toward the outside of the pressing member and closed so deformed. 20 According to the ninth aspect of the present invention, any one of the first to eighth aspects of the syringe device can be provided, wherein the sealed member is provided with a portion that can withstand the potential energy directed to the inner wall of the cylinder by the fixing mechanism. A thick portion extending along the outer peripheral surface of the aforementioned sealing member. According to the tenth aspect of the present invention, a ninth aspect of the syringe device can be provided. 10 200523490 10 15 Among which, the thickness portion is provided at a position where the above-mentioned closed member is rubbed. According to the syringe device of the first aspect of the present invention, the durability of the cylinder and the piston can be improved by the abrasion resistance and high adsorption properties possessed by the carbon-containing resin. In addition, since the closed member is fixed by applying potential energy to the inner wall of the cylinder, high adhesion between the cylinder and the cylinder can be ensured. Therefore, it is not necessary to form the rod into a rod shape that matches the inner diameter of the cylinder. Therefore, even if the cylinder is made of glass, the problem of breakage caused by squeezing L can be solved, and the liquid adjustment device does not need high assembly accuracy and movement accuracy. In addition, it is not necessary to increase the processing accuracy when the cylinder and the piston are combined, and the cylinder and the piston can be manufactured separately. Therefore, even if either party is damaged, only the damaged party can be replaced. According to the second and third aspects of this month, the closed member can be easily fixed to the living room. For example, when the closed member is damaged, it can be easily replaced: by holding the closed member at both ends and making it face to the The outer side is deformed by swelling, and a simple structure can be adopted to make the sealed member closely contact the inner wall of the cylinder. According to the syringe device of the 4th, 6th and 7th aspects of the present invention, the seal member can be prevented from closing by closing the seal with the makeup of the 20 front members. Leakage between the plugs' is ensured to ensure the accuracy of liquid discharge. In addition, due to the deformation of the gasket, the closed and closed member is expanded and deformed outward. The structure of the series makes the closed member close to the inner wall of the frame. And, if it is a screw Connecting the 6th and 7th syringe devices of the J 鳊 side and the 柃 side of the fixed structure 弋 member, using the front-end mounting member and the rod-side mounting member of the fixed piece can simplify the retaining and fixing of the washer at the same time : Holding and fixing the sealing member and _ i ττι for the strength of the washer. Therefore, the degree of closure of the injection test can be adjusted according to the performance required by the liquid regulating device. In addition, because the ring can be fixed in 200523490 order Potential energy is given in the directions where the components are facing away from each other, so that it is possible to prevent the screw of the fixed component from loosening due to long-term use. According to the eighth aspect of the present invention, the closed component that has been deformed by the two gaskets can have a larger area and a circle. The tube is tightly attached, so high adhesion can be achieved, and the degree of wear of the closed member caused by sliding of the 5 plug can be reduced to improve durability.

According to the syringe device of the ninth and tenth aspects of the present invention, it is possible to increase the thickness of the portion of the sealing member that is in close contact with the cylinder, and to prevent the deterioration of the adhesion caused by the wear of the sealing member caused by the sliding of the piston. Therefore, the sealed member can be used for a long period of time and durability can be improved. 10 Brief Description of the Drawings The above and other objects and features of the present invention can be clearly understood from the following description of the preferred embodiments of the accompanying drawings. The description of these drawings is as follows. Fig. 1 is a schematic perspective view showing the structure of a syringe device according to the first embodiment of the present invention.

Fig. 2 is an enlarged exploded perspective view of a piston of the syringe device of Fig. 1; Fig. 3 is a perspective view of the front-end mounting member used in the piston of Fig. 2. FIG. 4 is a partially enlarged perspective view of a piston rod used in the piston of FIG. 2. Fig. 5 is a partially enlarged sectional view of the piston of Fig. 2 in the middle of assembly. 20 Figure 6 is a partially enlarged sectional view of the piston in Figure 2 after assembly is completed. Fig. 7 is a perspective view of a front-end-side mounting member used in a piston of a syringe device according to a second embodiment of the present invention. Fig. 8 is a partially enlarged perspective view of a piston rod of a syringe device according to a second embodiment of the present invention. 12 200523490 FIG. 9 is a partially enlarged sectional view of a piston of a syringe device according to a second embodiment of the present invention in the middle of assembly. Fig. 10 is a partially enlarged sectional view of a piston of a syringe device according to a third embodiment of the present invention in the middle of assembly. 5 FIG. 11 is a perspective view of the front-end mounting member used in the piston of the syringe device of FIG. 10. Fig. 12 is a perspective view of a rod-side mounting member used for a piston of a syringe device. Fig. 13 is a perspective view 10 of the O-ring mounting tool used for the piston of the syringe device. Fig. 14 is a schematic diagram showing the construction of a conventional syringe device. Fig. 15 is a block diagram showing a schematic structure of a liquid regulating device equipped with the syringe device of the present invention.

15 I: Embodiment I

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the present invention, the same parts are marked with the same reference symbols in the drawings. Fig. 1 is a schematic perspective view showing the structure of a syringe device according to a first embodiment of the present invention. The syringe device 1 of this embodiment is a liquid regulating device (refer to FIG. 15) for measuring a plurality of kinds of liquids such as dyes and mixing them into a mixed liquid at an arbitrary ratio as a part for measuring a predetermined amount of liquid. And users. Fig. 15 shows a schematic structure of a liquid regulating device capable of mounting the syringe device of the present invention. The liquid regulating device 100 is a device that can mix multiple liquids at any ratio. 13 200523490 Set, including a container 1022 ~ 102η for holding the liquid, and a syringe device 1 for sucking and discharging the liquid in the container 102a ~ 102η (Figure 15) In the following, la ~ ln < symbols are attached to distinguish individual syringe devices), a drive motor 103 of a driving mechanism example for driving the piston 3 of the syringe device toward its axial direction, and a mixing container for containing 5 liquids 104. As the driving mechanism, the driving motor 103 is connected to the pistons 3 of the syringe devices 1a to 1n, and the pistons 3 of all the syringe devices can be moved at the same time. Each of the containers 102a to 102η is connected to the piping 11 ia to 11 η, and is connected to the syringe devices ia to in via the directional valves 10la to 10In and the piping 112a to 112η, respectively. The three-way valves 10la ~ 101η are also connected to the pipes lioa ~ iioon. 10 Each of the three-way valves 101a ~ 101n can switch the pipes 111a ~ llln connected to each of the containers 102a ~ 102η and the pipes 110a ~ 110η connected to the mixing container ι04 by means of a control device (not shown), and The container side and the mixing container side are switched between pipes connected to the pipes 112a to 112η. Here is an example to explain the operation of the liquid adjustment device when the containers 102 & and 10b of liquid 15 are mixed with different components. First, all three-way valves 101a to 10In are connected to the container side to drive the motor 103 to pull the piston. In this way, the syringe device can draw liquid from all the containers 102a to 10211 to the syringe. Then, the driving motor 103 presses the piston again. In this way, the liquid existing in the syringe devices 1a to 1n is returned to the containers 102a to 102n. In addition, the control device can switch the three-way reading 20 101a to 101n to the piping 11o side at any time, and the syringe devices 1a and 1b can communicate with the piping 11o. In this way, the liquid to be mixed can be fed into the syringe device 1a ~ In by the drive motor to drive the piston into the mixing container 104. Then, the control device can detect the driving interval of the drive motor and simultaneously detect the amount of liquid sent to the mixing container 104. Once it is confirmed that the expected amount has been sent, the three-way valve 101a ~ 101n is switched to 200523490 to the container side. . Next, the syringe device will be described. The syringe device is composed of a cylinder 2 and a piston 3. The cylinder 2 is made of glass, and a small-diameter fluid inlet and outlet are provided near the front end of the cylindrical body. The fluid inlet and outlet are connected to the liquid container for liquid adjustment of the 5 liquid adjusting device, and the cylinder 2 can suck and discharge the liquid stored in the container from the inlet and the outlet 2b along with the back and forth movement of the piston 3 indicated by the arrow. Piston 3-As will be described later, it includes: a metal piston rod%, a sealing member 6 provided at the front end of the cylinder 2 insertion side of the piston rod 3a, and a piston rod% 10 inserted into the aforementioned cylinder side. The fixing members (4, 5) of the fixing mechanism example in which the sealing member 6 is fixed to the front end. In addition, the other end of the piston rod 3a is provided with a connecting portion 3c for connecting with a driving mechanism of a liquid regulating device (not shown). The sealing member 6 is composed of a fluoropolymer such as a fluororesin or a gas rubber containing carbon fiber (15% by weight), and can be deformed by the fixing member (4, 5) so as to face the inner wall 2E of the cylinder 2. Potential energy is fixed to the front end of the piston rod 3 a in a state of 15. The fluororesin may be exemplified by any two or more of the following types of mixed resins: polytetrafluoroethylene (such as Teflon (trademark)), polytetrafluoroethylene (PTFE), soluble polytetrafluoroethylene copolymer (Pfa), hexafluoropropylene copolymer (FEP), ethyl propargyl ether terpolymer (EPE), ethylene copolymer (ETFE), polytrifluorochloroethylene (PCTFE), monogas trifluoroethylene_ethylene Total 20 polymers (ECTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), monofluoroacetic acid copolymer (MFA), difluoroethylene-hexafluoropropylene copolymer, tetragas ethylene-hexafluoropropylene -Difluoroethylene terpolymer (THV), tetrafluoroethylene-propylene copolymer, DAI-EL themu> plaStiC (made by Daikin Industries), CEFRAL SOFT (made by Central Glass), CYTOP (made by Asahi Glass), Dyneon HTE (3M system). For 'Fluor 15 200523490 rubber, the following can be cited: difluoroethylene binding_three gas / Italy 2 or more mixed rubber as examples, digas acetamidine-hexagas propylene diene copolymer, digas ethene-hexaki Propylene copolymer, gum. Tetrafluoroethylene terpolymer, Tetrafluoroethylene propylene acrylic rubber% ^ J in the closed member 6 is made of carbon fiber (15% by weight) of arborite (polytetrafluoroethylene resin with '...', called the 5-fold word Rat resin deformed member. Contains a cylindrical elastic material made of carbon fiber loaded with _ω)), which is used as the valve structure of the piston. The fat is made of a device with abrasion resistance and high adsorption. Closed II can reduce the use of anti *; the main shot 10 to increase the amount of liquid discharge ^ can ensure the tightness between the cylinder and the accuracy of the company system. The sealed member of this embodiment is formed by using a carbon fiber (content: 15%) (Teflon®) T / # 9002-CF15 in a cylindrical shape. The amount of carbon incorporated into the fluororesin is not particularly limited, but is limited to about 1 G to 2 (% by weight). If the amount of carbon is increased, the friction with the inner surface of the cylinder can be reduced, but if it is too much, the strength tends to decrease. The outer peripheral surface 28 of the closed member 15 does not have a band-shaped protrusion extending perpendicular to its axial direction to form a thick portion. As described later, when it is deformed by being squeezed from the inside, it will contact the inner wall of the cylinder 2 . Fig. 2 is an enlarged exploded perspective view of a piston of the syringe device of Fig. 1; Fig. 3 is a perspective view showing the structure of the end-side mounting member before Fig. 2; Fig. 4 is a perspective view showing the structure of the rod-side mounting member of Fig. 2. As shown in Fig. 2, the piston 3 includes a piston rod 3a and a sealing member 6 provided at a front end thereof. The sealing member 6 is fixed by a fixing member. The fixing member includes a rod-side mounting member 4 which is composed of a circular plate and whose center is fixed to the front end of the piston rod 3a, and is provided to be connected to the rod-side mounting member 4 and 16 of the sealing member 6 which can hold the sealing member 6 in common with the rod-side mounting member 4 200523490 The front-end mounting member 5 is a rubber ring 0 which is arranged as a ring to be in close contact with the inside of the sealing member 6. The rod-side mounting member 4 is composed of a rigid body such as metal. As shown in FIG. 4, a ring-shaped concentric shape is provided on the surface 21 of the disc-shaped remaining portion 20 that is not connected to the piston rod 3 a, concentrically with the plate-shaped portion 20. Protrusion-shaped o-ring holding section 22. The o-ring clamp has an outer diameter dimension M which is substantially the same as or slightly smaller than the outer diameter dimension of 0% 7. In addition, the surface 24 of the 0-ring holding portion 22 has a wealth view, so that the screw of the front-end mounting member 5 described later can be inserted into a threaded hole 23 formed inside the 0-ring holding portion 22 and screwed. The front-end side mounting member 5 is composed of a rigid body such as metal. As shown in the foregoing description, a ring-shaped support is provided concentrically on the surface 31 of the disc-shaped plate-shaped portion 30, and a male screw 33 is provided thereon. . The surface 31 of the plate-like portion 30 is formed in a flat plate shape so as to be in contact with the end portion of the sealing member 6. The plate-shaped portion 30 constitutes an outer diameter dimension substantially equal to that of the closed member 6 except that the ring holding portion M constitutes an outer diameter dimension M which is slightly smaller than the internal dimension of the closed member 6. The outer diameter of the "male screw" is approximately the same as the inner diameter of the o-ring 7. The rod-side mounting member and the front-end mounting member hold the sealing member 6 and are fixed near the front end of the screw 2. The screw 33 and the screw hole 23 are parallel When mounted on the rod side 4 20

When the other end-side mounting member 5 is completely screwed together, the interval b between the plate-like side and the% surfaces 21 and 31 is slightly shorter than the length dimension a of the closed structure. Fig. 5 is an enlarged cross-sectional view of the piston of Fig. 2 in the middle of the assembly. As shown in Fig. 5, the piston system is assembled at the end of the piston rod. The rod-side mounting member 4 and the front-side women's clothing member hold the closed member 6 and the cutting surface in a circular shape. Ring 7 people. Coincidentally, it is inserted into the 0 ring 7 to be in close contact with the inner surface of the closed member 6 and arranged 17 200523490 to fix it so as to cover the front side of the 33 part of the male screw 椁 of the member 5, and then toward the arrow M The direction shown is screwed into the front-end-side mounting member 5 and is connected to the lever-side mounting structure and the like. 10 15 Figure 6 is an enlarged sectional view of the piston in Figure 2 after assembly. As shown in FIG. 6, the closed structure and the o-ring 7 of the male screw 33 that covers the front-end side mounting member 5 are respectively held by the o-rings 432 and 22 of the front-side mounting member 5 and the rod-side mounting member. The holding surface 35, 25M [i] ^ ^ The production holding portion 32 of the front-side mounting member 5 and the ring holding portion of the rod-side mounting member 4 constitute the contact surface 35 of the surface of the ring 7 that is pressed during assembly. If the interval between 25 is less than the thickness of the o-ring 7, the o-rings of the front-end-side mounting member 5 and the rod-side mounting member 4 are held down and deformed by wiping. Since 3 of the front-end side mounting member 5 is inserted inside the 0 ring 7 [the 〇 ring 7 is deformed to the outside ', as shown by arrow 63, the dense side is deformed. Also, the 0 ring 7 can be adjusted by the front end The screw of the side-an I component and the piston rod is equal to the degree, and the degree of deformation of the ring is discussed. In this way, the closed structure can be enlarged toward the outside ^ to increase the diameter, and the inner surface of the cylinder 2 is squeezed more firmly and closely, And: adjust the degree. Furthermore, the 'deformed 0 paste' imparts potential energy to each other due to the front end 'member 5 and the rod-side mounting member 4, so it can prevent the connection between the front creeping women's member 5 and the rod 4 Clever rod M, post acupuncture. The amount of variation of the loose closed member 6 varies depending on the size of the wire and the device required by the device. Generally speaking, relative to the inner diameter of the cylinder 2, the outer peripheral surface 28 of the closed member 6 when the north deforms The diameter should be 9 (m or less, after t deformation, the largest diameter part of the closed member 6 (including band-shaped protrusions; the inner diameter of a cylinder is preferably about 100 to 105%. 200523490) If the bifurcated member 6 is deformed, it can reduce the machining accuracy when forming the hermetic member 6 with the cylinder, and it is necessary to increase the machining accuracy when the cylinder and the piston are combined. The cylinder and the piston can be made separately, and even if any of them is damaged, only the broken and 5 damaged ones can be replaced. In addition, the closed member 6 is squeezed outward due to the deformation of the o-ring 7 in the closed member. The ring 7 and the front-side mounting member 5 and the rod-side mounting member # are inflated and deformed outward by being held by them. For example, when the piston is tilted and shifted and the piston rod is shifted from the central axis of the cylinder, it can be deformed. This offset is absorbed to prevent damage to the cylinder · 10. Therefore, it is possible to absorb the propagation pressure between the cylinder 2 and the piston 3. Even if the operating axis of the piston 3 and the central axis of the cylinder 2 are incomplete, the damage of the piston or the cylinder can be reduced. Therefore, the liquid regulating device is assembled. It is not necessary to require a precision when installing the syringe device. Second, the syringe device of the second embodiment of the present invention will be described. Although the injection device of this Note 15 has a structure generally similar to that of the syringe device of the i embodiment, it is used for The structure of the sealing member for fixing the sealing member 6 to the piston is different. Fig. 7 is a perspective view of the front-end-side mounting member φ formed by the piston of the syringe device according to the second embodiment of the present invention. The front-end-side mounting member 5 is in the shape of a circular plate. The surface 31 of the plate-shaped portion 30 is concentrically provided with an o-ring, and further has a shape in which a male screw 33 is extended at a central portion of the plate-shaped portion 30. The plate-shaped portion viewing surface 31 forms a flat plate shape. So that it comes into contact with the end of the sealing member 6 during assembly. The plate-shaped portion 30 constitutes an outer diameter approximately equal to the outer diameter of the sealing member 6, and the ring holding portion 32 constitutes an outer diameter slightly smaller than the sealing. The outer dimensions of the male screw 33 are smaller than the inner dimensions of the 0 ring. The shirt example system 19 200523490 is determined by the rod-side mounting member 4 fixed on the piston to determine the direction of the 0 ring surface. Fig. 8 is an enlarged perspective view of a front end portion of a piston used in a piston of a syringe device according to a second embodiment of the present invention. The piston system constitutes a front end of a piston rod 3a fixed at the center of a rod-side mounting member 4 on the rod side. The mounting member 4 has a disc-shaped plate-shaped 邛 20. The surface 21 of the plate-shaped portion 20 is concentrically provided with an o-ring holding portion μ, and further, a ring-embedded portion 26 is provided concentrically thereon. The central part is provided with a thread hole 23 having a female thread 24 for screwing with the male screw 33 of the end-side mounting member 5. The plate-shaped portion 20 of the rod-side mounting member constitutes its outer diameter and a closed member. The outer diameter dimensions of 6 are approximately the same, and the o-ring holding portion 22 constitutes an outer diameter dimension which is slightly smaller than the inner diameter dimension of the closed member 6. The outer diameter dimension of the ring fitting portion 26 is substantially equal to the inner diameter dimension of the o-ring. The height dimension of the ring-embedded portion 26 is slightly smaller than the thickness dimension of the 0-ring used. The rod-side mounting member 4 and the front-end mounting member 5 have been formed when the threads 24 and 34 of both are fully screwed, that is, when the surface of the ring-embedded portion of the rod-side mounting member 4 contacts the ring of the front-end mounting member 5 When the gripping surface 35 of the gripping portion 32 is used, the interval between the surfaces 21 and 3 of the plate-like portions 20 and 30 is slightly shorter than that of the two ends of the closed member 6. Therefore, when the rod-side mounting member 4 and the front-side mounting member 5 are completely screwed together, the rear and closing members 6 are squeezed by the surfaces 21 and 31 of the rod-side mounting member 4 and the front-side mounting member 5 and slightly outward. Deformation. Fig. 9 is a partially enlarged sectional view of a piston in the middle of assembly. As shown in FIG. 9, the piston 3 can be assembled to hold the sealing member 6 and the circular ring 7 between the rod-side mounting member 4 and the front-end mounting member 5. Specifically, the level inserting portion 26 of the rod-side mounting member 4 is fixed by being inserted into the O-ring 7, and the sealing member 6 is inserted into the front end side 20 200523490 of the male screw 33 of the mounting member 5, and then set to the arrow. The direction indicated by No. is screwed to the front-end mounting member 5 and the lever-side mounting member 4. The syringe device of this embodiment is slightly shorter than the height dimension of the ring-embedded portion 26 constituting the rod-side mounting member 4. The thickness of the ring 7 is less than the thickness of the ring. When the king screw is combined, the creep-side mounting member 5 and the rod The side mounting member 4.0 ring is flattened toward the screwing direction and expanded and deformed outward. Therefore, it can be determined by the thickness of the ring inserting portion 26 and the thickness of the ring 0—determining the deformation range of the ring 7 and making the screw completely The deformation amount of the sealing member 6 when the rod-side mounting member 4 and the front mounting member 5 are constant.

Next, a syringe device according to a third embodiment of the present invention will be described. This injector device has a structure that is substantially common to the syringe device of the first embodiment. This syringe device is also provided with a 0 ring mounting tool 8 for disposing a plurality of rings for deforming the sealing member 6, so that the 0 ring is mounted on the 0 ring mounting tool 8 and fixed to the rod-side mounting member 4 And the front-end side mounting member 5. FIG. 10 is a partially enlarged cross-sectional view of 15 $ during the assembly of the syringe device according to the third embodiment of the present invention. Figure η __ front end side of the piston used

A perspective view of the mounting member. The front end side mounting member 5 is provided with a 0-ring gripping portion 32 concentrically on the surface 31 of the disc-shaped plate-shaped portion buckle, and further assumes a shape in which a male screw 33 is provided at a central portion thereof extending in a vertical direction. The surface 3m of the plate-like portion 30 is formed into a flat plate-like shape so as to come into contact with the end of the sealing member 6 during assembly. The plate-like portion 30 is configured to have an outer dimension substantially equal to the outer diameter of the closed member 6, and the o-ring holding portion 32 is configured to have an outer diameter slightly smaller than the inner diameter of the closed member 6. The outer diameter of the male screw M is smaller than the inner diameter of the ring. Fig. 12 is an enlarged perspective view of a front end portion of a piston used in a piston of a syringe device according to a third embodiment of the present invention. The piston system is fixed at the front end of the piston rod 3a. 21 200523490 At the center of the rod-side mounting member 4, the rod-side mounting member 4 has a disc-shaped talent portion 20. The surface 21 of the plate-shaped portion 20 is provided concentrically. The ring holding portion u central portion is provided with a thread hole 23 having a male screw and a screw thread 24 for connecting with the front end side mounting member 5. The plate-shaped portion 20 of the rod-side mounting member constitutes the outer rear dimension thereof, and the outer diameter dimension is slightly smaller than the inner diameter dimension of the closed member 6. Fig. 13 is a perspective view showing the external configuration of the O-ring mounting tool 8 used in the piston of the syringe device according to the third embodiment of the present invention. 〇The ring mounting tool 8 includes an insertion portion having a diameter approximately the same as the inner diameter of the 〇ring 7 used, and a projection provided concentrically between the insertion portions 42a and 42b and the insertion portions 42a and 42b. Margin 40. The flange portion 40 has an outer diameter that is substantially equal to or slightly smaller than the outer shape of the O-ring. Also, the height dimension c of the insertion portions 42a, 42b is slightly shorter than the thickness dimension of the O-ring used for insertion into the insertion portions 42a '42b. 15 20 The rod-side mounting member 4 and the front-end mounting member 5 have been formed when the threads 24 and 34 of the two are fully screwed together, that is, when the rod-side mounting member 4 and the front-end mounting member $ 0, 挟 ㈣22, 32 of The insertion part of the block 5, the mounting device 8 is known as 44, and the interval between the surfaces 2 and 31 of the plate-shaped portions 20 and 30 is slightly shorter than the two ends of the closed member 6. Therefore, when the rod-side mounting member is further screwed together with the front-end side wire member 5, the sealing member 6 is touched by the surface 2 of the rod-side mounting member 4 and the front-end mounting member 5 and slightly expands and deforms outward. * 2 As shown in FIG. 10, the piston 3 can be fitted into the sealing member with the O-ring mounting tool 8 and the Betong σ43 of the reading tool 8 and the screw 33 of the front-end mounting member 5 can be arranged on the rod-side mounting member. 4 and the front-end side mounting member $, and then the closed member 6 and the circular cross-section ring 7 are held together for assembly. Specifically, the inserting parts 42a and 42b of the accessible mounting tool 22 200523490 8 are respectively inserted and fixed by the o-ring 7, and the through-hole 43 of the sealing member 6 and 0¾ of the mounting tool 8 are inserted into the male screw 33 of the front-end mounting member 5. Partially arrange it, and screw the front-end-side mounting member 5 and the rod-side mounting member 4 in the direction shown by the arrow 62. 5 Because the height of the insertion part 42a, 42b constituting the o-ring mounting tool 8 is slightly shorter than the thickness of the o-ring 7 of the syringe device of this embodiment, once the front-side mounting member 5 and the rod-side mounting member 4 are completely screwed together, The 〇 ring presses the surfaces 41 a and 41 b of the flange portion 40 of the ring mounting portion, the front-side mounting member 5, and the rod-side mounting member 4 of the ring holding portions 22 and 32 on the surfaces 25 and 35 toward the screwing direction. , And expanded 10 outwards and deformed. Therefore, according to the thickness of the 0-ring insertion portions 42a and 42bi and the thickness of the 0-ring, the deformation range of the 0-ring 7 can be determined, and the closed member 6 when the rod-side mounting member 4 and the front-end mounting member 5 are fully screwed. The amount of deformation is constant. In addition, since the sealing member 6 is pressed from the inside with two O rings, it is possible to contact the cylinder with a large area 'to further improve the sealing performance and the durability against abrasion. 15 The closed member 6 of this embodiment is provided on its outer surface 28 with two strip-shaped protrusions 29a, 29b extending perpendicularly to its central axis. When two o-rings 7 are pressed from the inside to make them wait, When deformed, the protrusions contact the inner wall of the cylinder 2. As described above, according to the above-mentioned syringe device, the problems of the glass syringe device can be solved. It also maintains the required performance such as processing accuracy and durability. In addition, the present invention is not limited to the above-mentioned embodiments, and may be implemented in various other forms. In addition, by appropriately combining any one of the above-mentioned embodiments, the effects possessed by each of them can also be achieved. 23 200523490 Although the present invention has been fully described with reference to the accompanying drawings, it is needless to say that those skilled in the art can easily make various modifications and corrections. If the above-mentioned deformations and modifications do not deviate from the scope of the present invention defined by the scope of the attached patent application, it should be understood as the scope encompassed by the present invention. 5 I: Brief description of the drawings 3 The above and other objects and features of the present invention can be clearly understood from the following description of the preferred embodiments of the accompanying drawings. The description of these drawings is as follows.

Fig. 1 is a schematic perspective view showing the structure of a syringe device according to a first embodiment of the present invention. Fig. 2 is an enlarged exploded perspective view of a piston of the syringe device of Fig. 1; Fig. 3 is a perspective view of the front-end mounting member used in the piston of Fig. 2. FIG. 4 is a partially enlarged perspective view of a piston rod used in the piston of FIG. 2. Fig. 5 is a partially enlarged sectional view of the piston of Fig. 2 in the middle of assembly. 15 Figure 6 is a partially enlarged sectional view of the piston in Figure 2 after assembly is completed.

Fig. 7 is a perspective view of a front-end-side mounting member used in a piston of a syringe device according to a second embodiment of the present invention. Fig. 8 is a partially enlarged perspective view of a piston rod of a syringe device according to a second embodiment of the present invention. 20 Fig. 9 is a partially enlarged sectional view of a piston of a syringe device according to a second embodiment of the present invention in the middle of assembly. Fig. 10 is a partially enlarged sectional view of a piston of a syringe device according to a third embodiment of the present invention in the middle of assembly. FIG. 11 is a perspective view of the front end side mounting mechanism of the piston device of the syringe device of FIG. 24 200523490. Fig. 12 is a perspective view of a rod-side mounting member used for a piston of a syringe device. Fig. 13 is a perspective view 5 of the O-ring mounting tool used for the piston of the syringe device. Fig. 14 is a schematic diagram showing the construction of a conventional syringe device. Fig. 15 is a block diagram showing a schematic structure of a liquid regulating device equipped with the syringe device of the present invention.

25 [Representation of the main components of the _ type] 28 .............. outer peripheral surface 200523490 bu la ~ ln .. · injector device 2 ... cylinder 2a ... body 2b ... inlet 2E ... inner wall 3 ... piston 3a ... piston rod 3c ... connection (4, 5) · ••• Fixing member 4… Mounting side mounting member 5… Front side Ampei member 6… Sealing member 7… O-ring 8 ... O-ring mounting tool 20, 30 ... Plate-shaped portion 21, 31 ... The surface (holding surface) of plate-shaped portion 20, 30 22 '32 ... Ring-shaped holding portion 23 ... Thread cavity 24, 34 ... Thread 25, 35 ... The gripping surfaces 26 of the ring gripping portions 22, 32 ... The ring-embedded portions 29, 29a, 29b ... strip-shaped protrusions 33 ... screw 40 ... flange portions 41a, 41b ... surfaces 42a, 42b of the flange portion 40 ... insertion portion 43 ... through openings 44a, 44b ... upper surface of the insertion part 51 ... cylinder 52 ... piston 53 ... lubricating water injection mechanism 54 ... draining mechanism 55 ... lubricating water 6, 62, 63, 7 · arrow 100 ... Fluid device 101a ~ 101η ... Three-way valves 102a ~ 102η ... Container 103 ... Drive motor 104 ... Mixing container 110a ~ 110η ... Piping 111a ~ 111η ... Piping 112a ~ 112η ...

26

Claims (1)

200523490 Scope of patent application: 1. A syringe device used in a liquid regulating device, including: a bottomed cylindrical cylinder having a fluid inlet and outlet that communicates with a container for containing the liquid to be measured; And 5 a piston, inserted in the aforementioned cylinder in a state of sliding possible, and in contact with the inner wall of the aforementioned cylinder, is used to define a closed space capable of receiving fluid sucked in from the aforementioned fluid inlet and outlet; In addition, the device includes a driving mechanism capable of driving the piston in the axial direction, and the piston includes: a 10-piston rod having a connecting portion connected to the driving mechanism; a cylindrical sealed member made of carbon-containing fluorine The polymer-like compound has an outer diameter slightly smaller than the inner diameter of the cylinder, and is in a state of being elastically deformable; and a fixing mechanism is used to deform the sealed member, and the sealed member faces the circle In a state where the inner wall of the cylinder is endowed with potential energy, the sealing member is fixed before the piston rod is inserted at the front end of the side of the cylinder of 15; In addition, the aforementioned confined space can be defined by the aforementioned hermetically-enclosed component which is endowed with potential energy. 2. The syringe device according to item 1 of the scope of patent application, wherein the aforementioned fixing mechanism includes: a rod-side mounting member having the above-mentioned closed member fixed on the 20 end before the piston rod is inserted on the side of the cylinder The outer diameter dimension of the front side mounting member is substantially the same as that of the aforementioned rod side mounting member, and can hold the aforementioned sealed member together with the aforementioned lever side mounting member; and a connecting mechanism for connecting The rod-side mounting member and the front-end mounting member, so that the distance between the rod-side mounting member and the front-end mounting member is slightly shorter than the length dimension of the above-mentioned closed member 27 200523490; The front-end side mounting member can squeeze both ends of the starting and closing members, so that the sealing member expands and deforms outward to closely contact the inner wall of the cylinder, thereby defining the sealed space. 5 3. The syringe device according to item 2 of the patent application scope, wherein the aforementioned connecting mechanism includes: a screw hole provided in the central portion of the rod-side mounting member; and a screw provided in the central portion of the front-end mounting member. 4. The syringe device according to item 2 of the scope of patent application, wherein the aforementioned fixing mechanism further has a ring-shaped gasket, which is arranged inside the aforementioned sealed member, and the outer diameter dimension is substantially the same as the inner diameter of the aforementioned sealed member, and it is available for the aforementioned Those openings where the connecting mechanism is inserted, in addition to the above-mentioned ϋ 疋 mechanism and each having a 塾 circle holding portion, are formed to be able to form a thickness slightly shorter than the aforementioned 15 washer on the facing surface of the rod-side mounting member and the front-end financial member In the case of gaps, the loops can be deformed outwards by holding the loops by the loops holding portion, and the closed member can be squeezed outwards by the deformed loops to shape the loops. 5. The syringe device according to item 4 of the scope of the patent application, in which the cymbal ring holding section 20 is a circular protrusion having a diameter on the front-end mounting member and the rod-side mounting member that are approximately the same as those of the washer. 6. The syringe device according to item 5 of the scope of patent application, wherein the aforementioned connection mechanism includes: a screw hole, which is provided on the loop holding portion of the rod-side mounting member, and the opening of the washer after the mouth and the front 28 200523490 The screws are substantially the same; and the screws extend in a direction perpendicular to the holding surface of the washer holding portion provided on the front-end-side mounting member, and the diameter is approximately the same as the opening of the washer. 7. For the syringe device according to item 4 of the patent application, wherein the fixing mechanism 5 includes a washer-retaining protrusion, which is provided concentrically with the washer holding portion provided on the rod-side mounting member, and can be inserted by inserting the washer The opening is to hold the aforementioned gasket, and the diameter is substantially the same as the opening, In addition, the fixing mechanism further includes: a screw hole provided on the washer holding protrusion and having a diameter smaller than 10 openings of the washer; and a screw directed toward the washer holding portion provided on the front end side mounting member. The holding surface extends in a vertical direction and has a smaller diameter than the opening of the aforementioned washer. 8. The syringe device according to item 2 of the patent application scope, wherein the aforementioned fixing mechanism further comprises: 15 2 washers, arranged inside the closed member toward the axial direction of the piston The size of the outer diameter is substantially equal to the inside diameter of the closed member and has an opening through which the aforementioned connecting mechanism can be inserted; the washer mounting device includes: a through opening for the inserter of the aforementioned connecting mechanism; 20 cylindrical washer The insertion part is substantially the same in outer diameter as the opening of each washer; the flange part is concentrically arranged between the washer insertion parts to separate the two washer; and the washer installation tool is composed of The height dimension from the surface of the flange portion to the end of the insert portion of the washer 29 200523490 is slightly smaller than the thickness of each washer; the washer holding portion is formed on the facing surface of the rod-side mounting member and the front-end mounting member. And a gap slightly shorter than the thickness of the washer is formed between the flange portion and the flange portion. 5 Moreover, each washer holding portion and the flange portion provided on the rod-side mounting member and the front-end mounting member can be held. Each washer expands and deforms to the outside, and the deformed washer can be deformed by pressing the closed member toward the outside. 9. In the case of the syringe device of the scope of application for patent No. 1, 2, 3, 4, 5, 6, 7, or 8, 10, the above-mentioned closed member is more capable of withstanding the potential energy of the cylinder toward the inner wall of the cylinder given by the aforementioned fixing mechanism. A portion is provided with a thickness portion extending along the outer peripheral surface of the aforementioned sealing member. 10. The syringe device according to item 9 of the patent application scope, wherein the thickness portion is provided at a position where the gasket is pressed by the gasket. 30