JPH0676097U - dispenser - Google Patents

Abstract

(57) [Summary] [Purpose] A dispenser for quantitatively extracting a liquid in a container has a structure capable of easily ejecting a highly viscous liquid. In a pump type dispenser, a secondary discharge valve 8 provided at a lower end of a stem 5 is composed of a sliding piston 4 and a valve port 8f formed by a vertical groove 8c formed in a fitting projection 8d. However, the concave notch 8h is provided on the upper end surface of the fitting protrusion 8d to reduce the flow resistance of the liquid.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid pump dispenser for dispensing a fixed amount of liquid in a container.

[0002]

[Prior art]

 There are various types of liquid discharge pumps. In the cylinder vertically installed in the liquid container, the discharge head is slidably fitted to the head of the cylinder, and the system having the cylindrical piston on the peripheral side is slid upward, while the ball valve is attached to the bottom of the cylinder. A reciprocating pump-type with a suction valve of the type and a secondary discharge valve that opens and closes the liquid flow path from the cylinder to the stem by sliding the piston between the piston and stem. Dispensers have been known.

For example, in 1991 Utility Model Registration Application No. 97976, in such a liquid discharge pump, the secondary discharge valve has a disk-shaped or downward cup-shaped spring seat at the lower end of the stem and a lower surface. , A shaft fitted to the inner diameter of the stem is projected on its upper surface, and an insert member having a shape in which a groove is formed in the vertical direction is inserted into and abutted from the lower end of the stem to the small diameter step portion in the stem, There is one in which a part of the lower part of the groove is exposed to the lower end of the stem and the exposed groove part is used as a valve opening.

[0004]

[Problems to be solved by the device]

 In the liquid ejector having such a structure, the peripheral edge of the upper surface of the fitting portion of the insert member is in contact with and fixed to the small-diameter step portion 5a in the plunger as shown in FIG. Since the small-diameter step portion 5a is partially covered, the channel cross-sectional area of the groove is significantly reduced. Therefore, the flow rate of the liquid is limited, the operation of pressing the pump for discharging the liquid becomes heavy, and when the viscosity of the liquid is large, there is a drawback that the liquid is not discharged at all.

It is also possible to limit the insertion limit of the insert member into the stem by abutting it on the lower end surface of the stem. In order to secure the movability, as shown in FIG. 4, the part of the insert member 8e that fits into the inner diameter of the stem 5 is made to have a slightly smaller diameter 8s, and the lower end portion of the stem is provided with a gentle radius 5b. It is customary to Further, expansion and deformation of the outer diameter of the stem 5 are avoided by preventing the insert member 8e from abutting 5c on the lower end surface of the stem 5. Therefore, the small-diameter step portion 5a is required on the inner diameter of the stem. Moreover, as described above, the small diameter step portion 5a narrows the liquid flow path.

[0006]

[Means for Solving the Problems]

 In order to eliminate such a drawback, the present invention provides a reciprocating pump dispenser having a piston sliding between a cylinder and a stem as a secondary discharge valve as described above. A hemispherical or inverted conical concave part is formed on the upper end surface of the insert part of the insert member that forms the inflow groove into the discharge valve port and the stem, eliminating the influence of blockage due to the step part in the stem and distributing the liquid. This is to secure a road.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a liquid ejector 1 includes a cylinder 2 to be vertically installed in a container, a ejection head 3 on the head, and a stem 5 having a cylindrical piston 4 on the circumferential side. The cylinder bottom 2a is fitted with a ball valve type suction valve 6 which is urged upward, and a liquid suction pipe 7 is hung from the bottom of the valve to the bottom of the container. In the reciprocating pump having the secondary side discharge valve 8 which opens and closes the flow path from the cylinder 2 to the stem 5 by sliding the piston 4 with respect to the stem 5 between the systems 5, the sliding piston 4 An insert member 8e having a valve seat 8a closely contacting the lower end peripheral edge 4a and a spring seat 8b on the lower surface thereof, and a fitting projection 8d having a plurality of vertical grooves 8c engraved on the upper surface thereof is provided in the vertical groove 8c. The valve opening 8 The upper end face 8g is engaged inside fitted so as to abut against the cylindrical portion 5a which is provided to the inner diameter of the stem 5 with a. Moreover, a semicircular or inverted conical concave cutout portion 8h is formed on the upper end surface 8g of the fitting projection 8d. Reference numeral 13 is a cap that can be attached to a container (not shown).

[0008]

[Action]

 In the liquid dispenser of the present invention having the above structure, when the stem 5 with the head 3 is lifted by the bias of the spring 9, the sliding piston 4 moves with the inner diameter of the cylinder 2 due to the sliding resistance of the stem 5. After a little delay from the movement, the peripheral edge 4a of the lower surface of the piston 4 comes into close contact with the valve seat 8a to close the valve opening 8f, and the pressure inside the cylinder is reduced in order to ascend while keeping the inside of the cylinder 2 secret. 10 is opened and the liquid in the container is sucked into the cylinder 2. On the contrary, when the stem 5 descends, the sliding piston 4 lags behind the movement of the stem 5 due to the sliding resistance with the inner diameter of the cylinder 2, and the upper peripheral edge of the piston comes into contact with the small diameter step portion 5a so that the secondary side valve opening 8f is formed. The liquid passage 12 from the cylinder 2 to the stem 5 and the nozzle 11 is opened, and the internal volume of the cylinder 2 is reduced by lowering the stem, and the liquid in the cylinder 2 passes through the passage 12 and the nozzle 11 More exhaled.

[0009]

[Effect of device]

 In the conventional dispenser, since the upper surface of the fitting projection 8d of the insert member 8g abuts the small-diameter step portion 5a provided on the inner diameter of the system 5, the flow of the vertical groove 8c formed in the projection 8d. In contrast to the fact that it could not be used for highly viscous liquids because the flow cross-sectional area was reduced and therefore the flow resistance of the liquid by the pump operation was increased, the insert member 8g was fitted in the dispenser of the present invention. Since the concave portion 8h is cut out on the upper surface of the portion, the concave portion 8h serves as a flow path, and therefore the liquid is not affected by narrowing the vertical groove 8c of the small diameter stepped portion 5a provided around the stem 5. A sufficient flow of is obtained. Therefore, the head pressing force for ejecting the liquid is reduced, and it can also be used as an ejector for highly viscous liquids such as viscous type shampoos and rinses.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of the dispenser of the present invention when not in use.

FIG. 2 is a vertical sectional view showing a usage state of the dispenser of the present invention.

FIG. 3 is a perspective view of an insert member forming a liquid passage.

FIG. 4 is a perspective view of a conventional insert member.

[Explanation of symbols]

 1 Liquid Discharger 2 Cylinder 3 Discharge Head 4 Piston 5 Stem 5a Small Diameter Step 6 Suction Valve 7 Liquid Suction Pipe 8 Discharge Valve 8a Valve Seat 8b Spring Seat 8c Vertical Groove 8d Fitting Protrusion 8e Insert Member 8f Valve Port 8g Top Surface 8h Notch 9 Spring 10 Primary side ball valve 11 Nozzle 12 Passage 13 Cap

Claims (1)

[Scope of utility model registration request] 1. A bottom of the cylinder is fitted and inserted into a cylinder vertically installed in a container with a discharge head on the head and a stem having a cylindrical piston on the peripheral side urged upward. Is equipped with a ball valve type suction valve and a secondary discharge valve that opens and closes the flow path from the cylinder to the stem by sliding the piston with respect to the stem between the piston and the stem. In the dispenser, the insert member forming the secondary discharge valve port, the inflow guide groove into the stem, and the spring seat forms two to five vertical grooves in the insert portion to the stem, and the insert thereof. A structure of a dispenser characterized in that a hemispherical or conical concave cutout portion is formed on a tip end surface of the portion.