JP4947591B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger type liquid ejector, and more particularly to a pressure accumulation type trigger type liquid ejector.

  Many types of trigger type liquid ejectors have been proposed and sold for ease of use. Among them, the selling side has clarified the characteristics of the product and launched a differentiation from the competitors, surpassing the remaining in the market. For this reason, there is a demand for a higher function than the trigger type liquid ejector, and there is a demand for supplying a fine, uniform and stable mist, a crisp mist and bubbles, and a trigger type liquid ejector has been proposed. (For example, see Patent Document 1)

  The liquid ejector includes a pump that sucks, pressurizes, and pumps the liquid in the container by repeatedly checking the operation lever, and a pump that is integrally provided with the pump and that passes the liquid pressurized and pumped by the pump. A body having a supply path, and an injection nozzle that is disposed at the end of the supply path of the body and jets liquid that has been pressure-fed through the supply path toward the outside. A pressure accumulating valve is provided that always keeps the feed path closed and opens the feed path only when the pressure of the liquid reaches a specified pressure.

This pressure accumulation valve is comprised from the valve body and the elastic member. The valve body is mounted so as to be movable up and down in a vertical cylinder having the inside as a part of the feeding path. In addition, the elastic member has an upward stepped valve seat formed on the inner periphery of the vertical cylinder that enters the inner space from the opening of the valve body at the upper part of the valve body, and a seal portion of the downward stepped portion surrounding the valve body. While being pressed to hold the inside of the vertical cylinder in a closed state, it has a repulsive force that separates the valve body from the valve seat only when the specified pressure is reached.
JP 2006-205045 A

  The liquid ejector can be changed to an accumulator-type liquid ejector simply by inserting and arranging a pressure accumulating valve in the vertical cylinder of the body, and the liquid ejector can be changed without extra work such as a design change. It is an excellent one capable of uniform ejection.

  The present invention further improves such a trigger type liquid ejector, reduces the number of idle shots during initial operation, etc., facilitates the air bleeding operation in the pump, and determines whether to confirm the function after manufacture. A trigger-type liquid ejector suitable for stored liquids that can be smoothly ejected, can be ejected smoothly and uniformly, and does not want to come into contact with metal is proposed.

  The first means is configured as follows. That is, the cylinder 13 is communicated in the middle of the liquid flow path provided inside the main body B, and the trigger I for pushing the plunger H sliding inside the cylinder 13 is provided. In the trigger type liquid ejector constructed so as to be ejected from the nozzle J at the end of the liquid flow path, it is always upstream in the injection cylinder 12 which constitutes a part of the liquid flow path and the nozzle J is fitted at the tip. A pressure accumulating discharge valve 53 that presses the discharge valve body G biased to the discharge valve seat 40 to define a closed area with the suction valve 23 at the upstream position, and the discharge valve seat 40 and the discharge valve At least one of the bodies G is provided with an air escape groove 41 that communicates the upstream and downstream sides thereof.

  The second means is configured as follows. That is, in the first means, the pressure adjusting hole 17 for adjusting the pressure inside the injection cylinder 12 outside the discharge valve body G is formed in the injection cylinder 12.

The third means was configured as follows. That is, in either of the first means and the second means, one end is provided in the center of the introduction cylinder portion 37 provided in the injection cylinder 12 in a double cylinder shape, and the liquid is circulated around the periphery. The discharge valve seat 40 is formed on the outer periphery of the rear portion of the rod member F that is supported in a possible manner and the other end protrudes rearward of the introduction cylinder portion 37, and the injection cylinder 12 is formed from the base cylinder portion 50 that is pressed against the discharge valve seat 40. An annular rear sliding portion 51 that slides on the inner periphery and an annular front sliding portion 52 that slides on the inner periphery of the introduction tube portion 37 are provided to project the discharge valve body G, and the introduction tube portion 37 The discharge valve element G is urged by a coil spring s ₁ installed on the outer periphery, and a cylinder 13 having an annular cylinder chamber R composed of an inner cylinder and an outer cylinder 13a and an inner cylinder 13b is adopted. 13a Adopts a plunger H having a cylindrical shape with a closed end provided with an outer sliding portion 61 sliding on the inner periphery and an inner sliding portion 62 sliding on the outer periphery, and the inner cylinder 13b. The plunger H was urged by the coil spring s ₂ installed in.

  Since the trigger type liquid ejector of the present invention is provided with the air escape groove 41 in at least one of the discharge valve seat 40 and the discharge valve body G, the liquid flow path is removed from the state in which air is present in the liquid flow path at the beginning of use. Since the air can be efficiently discharged in the process of filling the liquid inside, it is possible to drastically reduce the number of trigger empty shots. Further, since the pressure accumulation type discharge valve 53 is employed, it is possible to smoothly and uniformly eject liquid as usual in this type of trigger type liquid ejector.

  When the pressure adjusting hole 17 for adjusting the pressure inside the injection cylinder 12 outside the discharge valve body G is formed in the injection cylinder 12, there is an advantage that the operation of the discharge valve 53 can be performed smoothly without difficulty. That is, when the discharge valve body G moves to the downstream side due to the hydraulic pressure, the surrounding annular space is compressed, but the compressed air is discharged to the outside from the pressure adjustment hole 17, so that the operation of the discharge valve body G Will not be disturbed. On the other hand, when the discharge valve body G that has shifted to the downstream side returns to the original state, air is introduced from the outside into the surrounding annular space that has become negative pressure through the pressure adjustment hole 17, and the smooth discharge valve body G Can be operated. In addition, as a function check after manufacturing, it is possible to easily check for defects such as a pressure-accumulating discharge valve 53 having a lack of sealing performance by measuring the air pressure from the pressure adjustment hole 17 or the like.

A rod member F which has one end portion in the center of the introduction cylinder portion 37 provided in a double cylinder shape in the injection cylinder 12 and supports the periphery so that liquid can flow therethrough, and the other end portion projects rearward of the introduction cylinder portion 37. The discharge valve seat 40 is formed on the outer periphery of the rear portion, and the inner periphery of the annular rear slide portion 51 and the introduction tube portion 37 that slides on the inner periphery of the injection cylinder 12 from the base cylinder portion 50 that is pressed against the discharge valve seat 40. An annular front sliding portion 52 that slides is provided to project the discharge valve body G, and the discharge valve body G is urged by a coil spring s ₁ installed on the outer periphery of the introduction cylinder portion 37, and the outer cylinder A cylinder 13 having an annular cylinder chamber R composed of an inner and outer double cylinder of 13a and an inner cylinder 13b is adopted, and an outer sliding portion 61 that slides on the inner circumference of the outer cylinder 13a and an outer circumference of the inner cylinder 13b are slid. adopted plunger H forming the tubular form of the tip occlusion with respective inner sliding part 62, and the plunger H is urged by the coil spring s ₂ installed in the inner cylinder 13b Expediently, one of the coil spring s ₁ and s ₂ may not come into contact with the liquid, therefore, generally particularly useful when using a receiving liquid prefer not to contact the coil spring is formed of a metal is there.

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

  1 and 2 show a trigger type liquid ejector 1 according to the present invention. The trigger type liquid ejector 1 includes a mounting cap A, a main body B, a suction pipe C, a suction valve member D, and a spin. A member E, a rod member F, a discharge valve body G, a plunger H, a trigger I, a nozzle J, and a stopper K are provided.

  The mounting cap A is used for mounting the trigger type liquid ejector 1 on the container body by screwing the peripheral wall 2 around the outer periphery of the mouth and neck. The mounting cap A is configured by extending the flange 3 from the upper end edge of the peripheral wall 2. Yes.

  The main body B integrally forms a top cylindrical mounting base 10, a vertical cylinder 11, an injection cylinder 12, and a cylinder 13. The mounting base 10 hangs a seal cylinder 14 fitted to the container body neck and neck from the lower surface, and press-fits the lower surface onto the mouth and neck via the packing p. Further, the mounting cap A is rotatably fitted to the lower outer periphery, and the flange 3 is engaged with the upper surface of the locking ridge 15 projecting from the lower outer periphery to prevent downward slipping. Then, the packing p and the locking protrusion 15 are sandwiched between the upper surface of the container neck and the lower surface of the flange 3 by screwing the peripheral wall 2 of the mounting cap A to the outer periphery of the container neck. ing.

  The vertical cylinder 11 has a lower end opened in the rear portion of the mounting base 10, penetrated through the top of the mounting base 10, and an upper end thereof is erected above, and an upper end portion of the suction pipe C is fitted inside, The lower end of the container is configured to hang down from the bottom of the container.

  In addition, the injection cylinder 12 has a base end opened at the upper end of the vertical cylinder 11 and is integrally extended forward, the tip is formed with a large diameter, and the nozzle J is rotatably fitted at the tip of the large diameter. is doing. A liquid flow path is formed from the container body to the spout 83 of the nozzle J through the suction pipe C, the vertical cylinder 11, and the injection cylinder 12.

  The suction valve member D, the spin member E, the rod member F, and the discharge valve body G are attached to the liquid flow path in the injection cylinder 12. The suction valve member D has a suction valve body 22 extending rearward from a fixed cylinder 20 fitted in the center part in the front-rear direction of the injection cylinder 12 via an elastic plate portion 21 having a meandering plate shape. A suction valve 23 is formed by pressing 22 to a suction valve seat 16 provided at the opening edge of the vertical cylinder 11.

  In the spin member E, a columnar portion 32 having a proximal end portion supported by a plurality of radial ribs 31 protrudes forward in the center of the ring 30 fitted to the large diameter portion of the distal end portion of the injection cylinder 12. . A pair of concave grooves 33 are provided in the outer surface of the columnar portion 32. In addition, a pair of arcuate plate-like walls 34 connected to the rear end portion of the columnar portion 32 and extending rearward are fitted to the rear end portion of the large-diameter portion of the injection cylinder 12. The middle part in the front-rear direction of each arc-shaped plate wall 34 is formed thin. In addition, a fitting cylinder 36 fitted to the injection cylinder 12 is extended rearward from the rear surface outer peripheral position of the rear wall portion 35 connecting between the rear ends of each arcuate plate-shaped wall 34, and the rear surface of the rear wall portion 35 From the inner peripheral position, a gap is provided between the fitting cylinder 36 and the injection cylinder 12, and the introduction cylinder portion 37 extends backward.

  One end of the rod member F is inserted into the center of the introduction tube portion 37 so that the liquid can flow therethrough, and the other end portion extends to the inside of the fixed tube 20 of the suction valve member D. An annular discharge valve seat 40 protrudes from the center part in the front-rear direction behind the introduction cylinder part 37.

The discharge valve seat 40 is provided with an air relief groove 41 that communicates the upstream and downstream sides thereof. The air relief groove 41 is located upstream of the discharge valve seat 40 in the so-called idle driving for discharging air in order to fill the liquid channel with liquid from the state in which the air at the beginning of use remains in the liquid channel. The air having a very small depth that can prevent the introduction of air or liquid from the upstream side to the downstream side of the discharge valve seat 40 is employed. For example, as shown in FIG. 3, the micro depth of about 0.05mm~0.15mm it is employed as a depth d _1. However, the present invention is not limited to this. Further, the width d ₂ can be selected relatively freely. For example, about 0.3 mm to 1.0 mm is preferably adopted, but this case is not limited to this. In this example, the air release groove 40 is provided in the discharge valve seat 40. However, as shown in FIG. 4, the air discharge groove 41 may be provided in the discharge valve body G, or although not shown, An air relief groove may be provided in both the valve seat 40 and the discharge valve body G. The number of the air escape grooves 41 may be single or plural, and may be appropriately selected according to the situation.

The discharge valve body G has a pair of front and rear skirt-like rear sliding parts 51 projecting from the outer periphery of the base cylinder part 50 and is slidably fitted to the inner periphery of the injection cylinder 12. A small-diameter skirt-shaped front sliding portion 52 projecting from the inner cylindrical portion 37 is slidably fitted to the inner periphery of the introduction cylinder portion 37 so as to be slidable in the front-rear direction. Further, a coil spring s ₁ is interposed between the rear surface of each arcuate plate-like wall 34 of the spin member E, and the rear end edge of the base tube portion 50 is pressed against the discharge valve seat 40 and discharged. A valve 53 is formed. The discharge valve body G is moved forward against the urging force of the coil spring s ₁ at a predetermined hydraulic pressure, and the discharge valve 53 is opened.

  A pressure adjusting hole 17 communicating with an annular space defined by the rear wall portion 35 of the spin member, the introduction tube portion 37, the discharge valve body G and the injection tube 12 is formed in the injection tube 12.

  The cylinder 13 protrudes obliquely downward and forward from the corner portion of the injection cylinder 12 and the vertical cylinder 11, and includes an inner cylinder 13b concentrically shorter in the outer cylinder 13a than the outer cylinder 13a. And the inner surface of the outer cylinder 13a is defined as a cylinder chamber R. The liquid flow path between the suction valve 23 and the discharge valve 53 and the upper part of the cylinder chamber R are communicated with each other through a communication hole.

Plunger H includes a base 60 that forms a cylindrical shape with a closed front end and a rear end opening, and a pair of front and rear slidable outer sliding portions 61 that project liquid-tightly slide on the inner periphery of outer cylinder 13a. and, an inner sliding part 62 for liquid-tight sliding inner cylinder 13b periphery constitutes by projecting the inner periphery of the base portion 60, thereby urged forward by the coil spring s _2.

The trigger I has an upper end pivotably connected to both sides of the tip of the injection cylinder 12 and hangs down to the front of the cylinder 13 so that the upper part is linked to the tip of the plunger H and locked. The plunger H is configured to move backward against the urging force of the coil spring s ₂ by pulling backward.

  The nozzle J extends from the rear surface of the front plate 81 to the rear end of the front cylinder 81, and a liquid cylinder is formed on the front outer periphery of the columnar section 32 of the spin member E. A guide cylinder 82 fitted so as to be slidable closely projects from the rear surface of the front plate 81 to the rear, and an ejection hole 83 is formed in the front plate 81 in the guide cylinder 82. On the inner surface of the guide cylinder 82, a pair of concave grooves 84 are provided which communicate with the concave grooves 33 of the spin member E and open and close the liquid flow path. A baffle plate 85 that prevents the trigger I from being pulled in is suspended from the lower surface of the nozzle J.

  When the baffle plate 85 is positioned on the front surface of the trigger I, the stopper K engages with the engagement protrusion 70 of the trigger I to act as a double stopper together with the baffle plate 85. At this time, when the baffle plate 85 is rotated and the nozzle J is rotated, it is moved upward by a projection (not shown) protruding from the nozzle J, and the engagement projection 70 and the engagement recess 90 are disengaged. The known mechanism is configured such that the trigger I can be retracted.

In the trigger type liquid ejector 1 configured as described above, when the baffle plate 85 is rotated from the state shown in FIG. 1 and the nozzle J is rotated, the engaging recess 90 of the stopper K is disengaged from the engaging protrusion 70 of the trigger I. As a result, the trigger I can be pulled in and the concave groove 84 of the nozzle J communicates with the concave groove 33 of the spin member E so that liquid can be ejected from that portion. Next, when the trigger I is pulled and the plunger H is pushed backward, the pressurized liquid in the cylinder chamber R opens the discharge valve 53 against the urging force of the coil spring s ₁ and passes through the concave grooves 33 and the concave grooves 84. However, since air is present in the liquid flow channel at the beginning of use, air is discharged from the upstream side to the downstream side of the discharge valve 53, the pressure becomes weak, and the discharge valve 53 is closed. After that, since the air is discharged through the air escape groove 41 with the residual pressure, the air can be discharged efficiently. When the discharge valve body G is moved, the air existing in the annular space inside the injection cylinder 12 outside the valve body G is discharged to the outside through the pressure adjusting hole 17 or introduced into the inside.

When the trigger I is pulled to a certain extent and a certain amount of liquid is ejected, the discharge valve 53 is closed by the coil spring s ₁ , and then when the trigger I is released, the plunger H is pressed by the action of the coil spring s ₂ and the cylinder The pressure in the chamber R is reduced, and the suction valve 23 is opened to introduce the liquid in the container into the cylinder chamber R.

It is a longitudinal cross-sectional view of a trigger type liquid ejector. Example 1 It is a principal part expanded sectional view of a trigger type liquid ejector. Example 1 It is a principal part expanded sectional view of an air escape groove part. Example 1 It is a principal part expanded sectional view of an air escape groove part. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Trigger type liquid ejector A ... Mounting cap 2 ... Perimeter wall, 3 ... Flange B ... Main body
10 ... Mounting base, 11 ... Vertical cylinder, 12 ... Injection cylinder, 13 ... Cylinder, 13a ... Outer cylinder, 13b ... Inner cylinder, 14 ... Seal cylinder, 15 ... Locking ridge, 16 ... Suction valve seat, 17 ... Pressure Adjustment hole,
p ... packing, R ... cylinder chamber C ... suction pipe D ... suction valve member
20 ... fixed cylinder, 21 ... elastic plate part, 22 ... suction valve body, 23 ... suction valve E ... spin member
30 ... Ring, 31 ... Rib, 32 ... Columnar part, 33 ... Concave groove, 34 ... Arc plate wall, 35 ... Rear wall part, 36 ... Fitting cylinder, 37 ... Introduction cylinder part F ... Bar member
40 ... Discharge valve seat, 41 ... Air relief groove G ... Discharge valve body
50 ... Base cylinder part, 51 ... Rear sliding part, 52 ... Front sliding part, 53 ... Discharge valve,
s ₁ ... Coil spring H ... Plunger
60 ... Base, 61 ... Outer sliding part, 62 ... Inner sliding part, s ₂ ... Coil spring I ... Trigger
70 ... engagement protrusion J ... nozzle
80 ... Rotating cylinder, 81 ... Front plate, 82 ... Guide cylinder, 83 ... Jet, 84 ... Ditch, 85 ... Baffle plate K ... Stopper
90 ... engaging recess

Claims (3)

The cylinder 13 is communicated in the middle of the liquid flow path provided inside the main body B, and a trigger I for pushing the plunger H sliding inside the cylinder 13 is provided. In the trigger type liquid ejector constructed so as to be ejected from the nozzle J at the end of the path, it is always attached upstream in the injection cylinder 12 which constitutes a part of the liquid flow path and the nozzle J is fitted at the tip. A pressure accumulating discharge valve 53 is provided which presses the biased discharge valve body G against the discharge valve seat 40 to define a closed area between the suction valve 23 at the upstream position, and the discharge valve seat 40 and the discharge valve body G A trigger type liquid ejector characterized in that an air escape groove 41 is provided in at least one of the air vents for communicating the upstream and downstream sides thereof. The trigger type liquid ejector according to claim 1, wherein a pressure adjusting hole (17) for adjusting the pressure in the injection cylinder (12) outside the discharge valve body (G) is formed in the injection cylinder (12). A rod member F which has one end portion in the center of the introduction cylinder portion 37 provided in a double cylinder shape in the injection cylinder 12 and supports the periphery so that liquid can flow therethrough, and the other end portion projects rearward of the introduction cylinder portion 37. The discharge valve seat 40 is formed on the outer periphery of the rear portion, and the inner periphery of the annular rear slide portion 51 and the introduction tube portion 37 that slides on the inner periphery of the injection cylinder 12 from the base cylinder portion 50 that is pressed against the discharge valve seat 40. An annular front sliding portion 52 that slides is provided to project the discharge valve body G, and the discharge valve body G is urged by a coil spring s ₁ installed on the outer periphery of the introduction cylinder portion 37, and the outer cylinder A cylinder 13 having an annular cylinder chamber R composed of an inner and outer double cylinder of 13a and an inner cylinder 13b is adopted, and an outer sliding portion 61 that slides on the inner circumference of the outer cylinder 13a and an outer circumference of the inner cylinder 13b are slid. the inner slide portion 62 employs a plunger H forming the tubular form of it it with the tip closed, and the plunger H is urged by the coil spring s ₂ installed in the inner cylinder 13b Motomeko 1 or trigger type liquid sprayer according to claim 2.

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