JP4260573B2 - Liquid ejector - Google Patents

Description

  The present invention relates to a liquid ejector.

  Various proposals have been made for liquid ejectors that are configured so that the pump is detachably attached to the container body, and the ejection head at the upper end of the pump is moved up and down to suck up the liquid in the container body and eject it from the ejection head of the ejection head. Has been. Among these, a flange-like top plate is extended from the upper end of the mounting cylinder detachably fitted to the outer periphery of the container body neck and neck, and the mounting cap is erected from the top plate, and the guide cylinder is A cylinder with a lower end opening that has a liquid flow path from the inside of a fitting vertical cylinder fitted to the upper end of a stem that protrudes so as to be able to be pushed down in an energized state, and that hangs down on the outer circumference of the guide cylinder so that the peripheral wall can be lowered There has been proposed one provided with an ejection head covered with a cover (for example, see Patent Document 1).

  The above guide cylinder is provided for the purpose of making the pump itself look good and preventing dust from adhering to the protruding part of the stem. There is only a gap that does not cause trouble.

Japanese Patent Laid-Open No. 9-58731 (page 2-7, FIG. 1)

  The liquid ejector of the present invention can improve the above-mentioned appearance, prevent dust adhesion, and the like, and the water droplets adhering to the periphery of the guide tube can be guided from the gap between the guide tube and the ejection head peripheral wall when the ejection head moves up and down. The present invention proposes an excellent liquid ejector that does not cause the inconvenience of entering inside. Further, the present invention proposes a liquid ejector that can easily fit the ejecting head in a predetermined direction even if the ejecting head is undesirably detached.

The first means is configured as follows. That is, the upper end of a stem 13 projecting so as to be able to be pushed down in an upwardly biased state inside the guide cylinder 12 has a top cylindrical cover 14 with a lower end opening on which the peripheral wall 14b is suspended so as to be able to be pushed down. A liquid ejector fitted with an ejection head 9, wherein a negative pressure releasing concave groove 20 communicating with the inside of the cover 14 is provided vertically on the outer circumference of the guide cylinder 12, and the inner circumference of the ejection head peripheral wall 14 b Is formed in a circular shape in cross section, or a negative pressure releasing concave groove 20 communicating with the inside of the cover 14 is provided vertically on the inner periphery of the ejection head peripheral wall 14b, and the outer periphery of the guide cylinder 12 is formed in a circular shape in cross section.

The second means is configured as follows. That is, the pump 3 is detachably attached to the container body 2, and the pump 3 has a flange-shaped top plate inwardly from the upper end of the mounting cylinder 10 detachably fitted to the outer periphery of the container body neck 6. 11 is extended and fitted to the upper end of a mounting cap 7 in which a guide cylinder 12 is erected from above the top plate 11 and a stem 13 which protrudes into the guide cylinder 12 so as to be able to be pushed down in an upward biased state. An ejection head 9 having a capped tubular cover 14 having a lower end opening with a peripheral wall 14b hanging down on the outer periphery of the guide cylinder 12 and having a liquid channel a extending from the inside of the stem 13 to the associated outlet 8; A liquid ejector configured to suck up the liquid in the container body by moving the ejection head 9 up and down and eject the liquid from the ejection port 8, and communicates with the outer periphery of the guide cylinder 12 inside the cover 14. The concave groove 20 for eliminating negative pressure The inner periphery of the discharge head peripheral wall 14b is formed in a circular cross section, or the negative pressure relief concave groove 20 communicating with the inside of the cover 14 is provided vertically on the inner periphery of the ejection head peripheral wall 14b, and the outer periphery of the guide cylinder 12 Was formed in a circular cross section.

The third means was configured as follows. In other words, the first means is fitted on the opposite wall surface of the concave groove 20 for releasing the negative pressure when the ejection head 9 moves up and down so as to be movable up and down on both sides of the concave groove 20. In combination, a pair of vertical ribs 21 for specifying the direction of the ejection head 9 was provided.

  As described above, the liquid ejector of the present invention is configured as described above, so that when used in a water field, water droplets adhering to the outer surface of the mounting cap enter the ejection head during the ejection operation of the ejection head. Can be prevented as much as possible. In addition, since the structure only needs to form a predetermined groove as compared with the conventional product, the intended purpose can be achieved without complicated manufacturing.

  Further, when the ejection head 9 is moved up and down, the direction of the ejection head 9 is specified by fitting into the concave wall 20 so as to be movable up and down on the opposite wall surface of the position where the negative pressure elimination recessed groove 20 is formed. The one provided with the vertical rib 21 also has an advantage that it can be easily re-fitted into an appropriate position even when a problem such as detachment of the ejection head occurs during use.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in the drawings, the liquid ejector 1 of the present invention includes a container body 2 and a pump 3.

  The container body 2 is formed of a synthetic resin or the like, and stands up the mouth and neck. In the illustrated example, the container body 2 is configured such that a mouth-and-neck portion 6 is erected from the upper end of a cylindrical body portion 4 via a shoulder portion 5.

  The pump 3 is also made of synthetic resin or the like, and is detachably attached to the container body 2 by a mounting cap 7 fitted to the container body neck 6 and has a jet head with a jet port 8 at the upper end. 9 is formed so as to be able to be pushed down in an upwardly biased state, and further, the ejection head 9 is moved up and down to suck up the liquid in the container body and eject it from the ejection port 8.

  In the present invention, the mounting cap 7 has a flange-like top plate 11 extending from the upper end of the mounting cylinder 10 detachably fitted to the outer periphery of the container body neck 6 and a guide from the inner peripheral edge of the top plate 11. A configuration in which the cylinder 12 is erected is used.

  Further, in the present invention, the ejection head 9 is fitted to the upper end of a stem 13 protruding so as to be able to be pushed down into the guide cylinder 12 in an upward biased state, and the peripheral wall can be pushed down on the outer periphery of the guide cylinder 12. A tubular cover 14 having a bottomed bottom opening that hangs down and a liquid flow path a extending from the inside of the stem 13 to the associated outlet 8 is employed.

  In the illustrated example, the ejection head 9 has a cover 14 in which a peripheral wall 14b is suspended from the peripheral portion of the top wall 14a, and a base end is provided at the upper portion of a fitting cylinder 15 suspended from the center of the back surface of the top wall 14a. A nozzle 16 that opens and penetrates the peripheral wall 14 b is provided, and the tip of the nozzle 16 is opened as a jet port 8. Then, the lower portion of the fitting cylinder 15 is fitted to a small diameter portion 13a formed at the upper end of the stem 13, and the ejection head 9 is fitted to the stem 13. The jet 13 passes through the fitting cylinder 15 and the nozzle 16 from inside the stem 13. A liquid flow path a reaching the outlet 8 is formed. At this time, the lower end of the peripheral wall 14b hangs down so as to be positioned on the outer periphery of the upper end of the guide tube 12.

  With respect to the mechanism for sucking up the liquid in the container body by moving the ejection head 9 up and down and ejecting it from the ejection port 8, this type of conventional pump can be employed. For example, the upper end is fitted to the mounting cap 7. The cylinder 17 is suspended in the container body 2. In the illustrated example, the cylinder 17 has a flange 18 projecting from the upper part of the outer periphery, and is fitted and fixed to the upper end of the inner periphery of the mounting cylinder 10 of the mounting cap 7. The lower end is suspended in the container body 2. The upper end of the cylinder 17 opens into the guide cylinder 12, and the stem 13 projects from the upper end.

  Although not shown, a piston sliding in the cylinder 17 is connected to the lower end of the stem, and a suction valve is provided in the lower end of the cylinder 17 and a discharge valve is provided in the stem 13. A pipe for wicking is suspended at the lower part of the body. Then, the pressure in the cylinder 17 of the piston that is lowered by pushing down the ejection head 9 causes the liquid in the cylinder to be ejected from the ejection port 8 through the stem 13, and the piston, the stem, and the ejection head by an upward biasing force such as a coil spring. The actuating member made up is sucked up the liquid in the container body through the pipe into the negative pressure cylinder.

  According to the present invention, this type of liquid ejector is provided with a negative pressure releasing concave groove 20 communicating with the inside of the cover 14. The concave groove 20 may be provided on the outer periphery of the guide cylinder 12 or on the inner periphery of the ejection head peripheral wall 14b. The embodiment of FIG. 1 shows an example in which a concave groove 20 for eliminating negative pressure is provided in the guide cylinder 12. In this case, the concave groove 20 is vertically provided in a portion extending from the upper end of the guide cylinder 12 to the lower portion thereof. Yes. By providing the concave groove 20, when the depressed ejection head 9 is raised, the inside of the ejection head 9 is prevented from becoming negative pressure, and water droplets adhering to the outer surface of the guide cylinder are sucked into the ejection head 9. This is to prevent this. Accordingly, even if there is a slight gap between the guide cylinder 12 and the ejection head 9 other than the concave groove 20 that does not prevent the vertical movement of the ejection head 9, water droplets adhering to the outer surface of the guide cylinder are ejected from the ejection head. 9 to prevent inhalation.

  4 and 5 show an example in which a concave groove 20 for eliminating negative pressure is provided on the inner surface of the peripheral wall 14b of the ejection head 9. FIG. In this case, the peripheral wall 14b is provided in a portion extending from the lower end portion to the upper portion. Specifically, when the ejection head 9 is at the lowest lowered position as shown in FIG. 4, its upper end is positioned above the upper end of the guide tube 12. Install vertically. Other configurations are the same as those of the embodiment of FIG. It should be noted that when the concave groove 20 for eliminating the negative pressure is provided in the guide tube 12 or in the ejection head peripheral wall 14b, the installation location is not limited to one, and a plurality of locations can be provided.

  In the present invention, the ejection head is fitted on the opposite wall surface of the position where the concave groove 20 for eliminating the negative pressure when the ejection head 9 moves up and down so as to be movable up and down on both sides of the concave groove 20. A pair of vertical ribs 21 that specify the direction of 9 may be provided.

  6 and 7 show a pair of the negative pressure releasing concave groove 20 provided vertically on the outer periphery of the guide cylinder 12, and fitted to both sides of the concave groove 20 from the inner surface of the ejection head peripheral wall 14b so as to be movable up and down. An example in which the vertical rib 21 is provided is shown. In the fitting position of the vertical rib 21 and the concave groove 20, the jet outlet 8 is configured to face forward. Other configurations are the same as those of the embodiment of FIG.

It is a partially cutaway principal part side view which shows one Example of this invention. It is a cross-sectional view along the AA line of FIG. It is a principal part front view of the Example. It is a partially notched principal part side view which shows the other Example of this invention. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4. It is a partially notched principal part side view which shows other Example of this invention. It is a cross-sectional view along the CC line of FIG.

Explanation of symbols

2 ... container body, 3 ... pump, 6 ... mouth neck, 7 ... mounting cap, 8 ... jet outlet,
9 ... ejecting head, 10 ... mounting tube, 12 ... guide tube, 13 ... stem, 14 ... cover,
14b ... peripheral wall, 20 ... concave groove, 21 ... vertical rib, a ... liquid flow path

Claims (3)

A jet head having a top-covered cylindrical cover 14 with a lower end opening that is suspended from the outer periphery of the guide cylinder 12 on the outer periphery of the guide cylinder 12 at the upper end of a stem 13 projecting so as to be able to be pressed down in an upwardly biased state in the guide cylinder 12 9 is a liquid ejector in which the guide cylinder 12 is provided with a negative-pressure-resolving concave groove 20 communicating with the inside of the cover 14 on the outer periphery of the guide cylinder 12, and the inner periphery of the ejection head peripheral wall 14b is cut in cross section. It is formed in a circular shape, or a negative pressure releasing concave groove 20 communicating with the inside of the cover 14 is provided vertically on the inner periphery of the ejection head peripheral wall 14b, and the outer periphery of the guide tube 12 is formed in a circular cross section. And liquid ejector. A pump 3 is detachably mounted on the container body 2, and the pump 3 has a flange-shaped top plate 11 inward from the upper end of the mounting cylinder 10 detachably fitted to the outer periphery of the container body neck 6. The guide cylinder 12 is extended from the top plate 11 and is fitted to the upper end of the stem 13 which is protruded so as to be able to be pushed down in the upward biased state in the guide cylinder 12. A jet head 9 having a capped tubular cover 14 having a lower end opening in which a peripheral wall 14b is suspended so as to be pressed down on the outer periphery, and a liquid flow path a extending from the inside of the stem 13 to the associated jet outlet 8; The liquid ejector is configured to suck up the liquid in the container body by moving the ejection head 9 up and down and eject the liquid from the ejection port 8, and is a negative ejector communicating with the inside of the cover 14 on the outer periphery of the guide cylinder 12. A concave groove 20 for pressure relief is installed vertically and the ejection head An inner periphery of the peripheral wall 14b is formed in a circular shape in cross section, or a negative groove for releasing negative pressure 20 communicating with the inside of the cover 14 is provided vertically on the inner periphery of the ejection head peripheral wall 14b, and the outer periphery of the guide cylinder 12 is provided. A liquid ejector having a circular cross section. When the ejection head 9 is moved up and down, it is fitted on the opposite wall surface of the position where the negative pressure eliminating concave groove 20 is formed so as to be movable up and down on both sides of the concave groove 20 and the direction of the ejection head 9 is specified. The liquid ejector according to claim 1, wherein a pair of vertical ribs 21 are provided.

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