JP4443287B2 - 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 liquid ejector, and is intended to improve the efficiency of assembly work of the ejector.

  Among the trigger type liquid ejectors that drive the pump mechanism by checking the operating lever to suck, pressurize and compress the liquid in the container and eject it from the nozzle, The liquid can be stably ejected regardless of whether it is easy to use (for example, see Patent Document 1).

JP-A-10-128180

  By the way, the pressure-accumulating trigger type liquid ejector has a larger number of parts and a complicated structure than a normal ejector, and therefore it is inevitable that the number of assembly steps is increased.

  The subject of this invention exists in the place which proposes the novel trigger type | formula liquid ejector which can perform an efficient assembly.

The present invention is a trigger type liquid ejector that sucks, pressurizes and compresses the liquid in the container by multiple checks of the operation lever and ejects the liquid to the outside through a spray nozzle,
A body provided with an open cylinder that surrounds the outlet end of the passage through which the liquid in the container passes and compartmentally molds the internal space, and an operating lever supported by the body in a swingable manner via a pivot shaft And a pump mechanism having a pressing head connected to the operation lever and pressurizing and compressing the liquid in the container sucked through the outlet end,
The pump mechanism is removable to secure holding by inserting the small diameter cylinder portion made of a combination of the small diameter cylinder portion forming the large-diameter portion and the first cylinder chamber having the same axis inside the cylindrical body of said body and wherein the cylinder and possible inner surface slidably move along the large-diameter portion having a spray nozzle at the tip, the second cylinder chamber while the internal closed space in cooperation with the cylinder It has a pressure head to be formed and a tip portion that forms a valve body at the inlet side end of the spray path of the spray nozzle, and starts to move along the inner surface of the small-diameter cylindrical portion together with the pressure head. A plunger that opens and closes the valve body due to a difference in pressure per unit area based on a cross-sectional area difference of the cylinder chamber is arranged inside the cylinder, and has a modular structure.
Said plunger includes plan and elastic support member for pressing constantly jar body towards the entry end of the ejection path of the spray nozzle, a pair of sliding each slide along said first cylinder and the second cylinder chamber walls A trigger-type liquid ejector characterized in that it has a section and a passage for sending the liquid to be compressed toward the valve body.

  In the trigger type liquid ejector configured as described above, it is preferable that the large-diameter cylindrical portion and the small-diameter cylindrical portion are integrally formed.

  Further, in the above-mentioned ejector, the stepped opening for sandwiching the tip of the small-diameter cylinder part by inserting the tip of the small-diameter cylinder part into the large-diameter cylinder part of the cylinder and fitting to the outer peripheral surface of the cylinder of the body. It can also be provided.

  Since the pump mechanism (pressure accumulating part) has a module structure in which it is fixedly held by being inserted into the cylinder of the body at the cylinder portion, efficient assembly can be performed.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 shows a cross section of a trigger type liquid ejector according to the present invention.

  In the figure, reference numeral 1 denotes a body covered with a shroud. The body 1 has a cylindrical body 1b that is open at one end and surrounds the outlet end of the passage 1a through which the liquid in the container passes to form an internal space.

  An operation lever 2 is supported by the body 1 through a pivot shaft so as to be swingable. A pump mechanism 3 sucks, pressurizes, and compresses the liquid in the container and ejects the liquid.

  The pump mechanism 3 includes a large-diameter cylindrical portion 3a having the same axis L and a small-diameter cylindrical portion 3c that forms a first cylinder chamber 3b. The small-diameter cylindrical portion 3c is inserted into the cylindrical body 1b of the body 1 and fixed. A detachable cylinder S to be held, a spray nozzle n at the tip, and slidable along the inner surface of the large-diameter cylindrical portion 3a. Although it has a pressing head 3e that forms the second cylinder chamber 3d and a tip part that forms a valve body t at the inlet side end of the spray path of the spray nozzle n, it starts to move together with the pressing head 3e. It consists of a plunger 3f that opens and closes the valve element t due to the difference in pressure per unit area based on the difference in cross-sectional area between the cylinder chambers 3b and 3d.

  The plunger 3f includes an elastic support member 4 that constantly presses the plunger 3f main body itself toward the entrance end of the spray path of the spray nozzle n, and the inner walls of the first cylinder chamber 3b and the second cylinder chamber 3d, respectively. A pair of sliding portions 5a and 5b that slide and a passage 6 that feeds a liquid to be compressed toward the valve body t are provided.

  When the operating lever 2 is depressed, the pressing head 3e slides along the inner surface of the large-diameter cylindrical portion 3a, and the plunger 3f is moved along the inner surface of the first cylinder chamber 3b formed by the small-diameter cylindrical portion 3c. Move along.

  When the force applied to the control lever 2 is released when the end of the plunger 3f reaches the bottom of the cylinder S, the plunger 3f returns to the initial position by the restoring force of the elastic support member 4, Since the cylinder S has a negative pressure, the liquid in the container is sucked through the passage 1a and flows into the cylinder S.

  Here, when the operation lever 2 is checked again, the liquid in the cylinder S is pressurized and compressed, and flows through the passage 6 toward the valve body t.

  The plunger 3f until the liquid is ejected follows the following operation. First, the pressure in the second cylinder chamber 3d formed in the pressing head 3e and the pressure in the first cylinder chamber 3b formed in the cylinder S are the same, but the cross-sectional area in the second cylinder chamber 3d is the first. Since it is larger than that of the cylinder chamber 3b, there will be a difference in pressure per unit area. As a result, the amount of movement of the plunger 3f exceeds the amount of movement of the pressing head 3e, so that the valve body t opens and pressurizes and compresses. The liquid is sprayed in the form of a mist through the spray nozzle n.

  In the ejector configured as described above, the pump mechanism 3 as the pressure accumulating unit is modularized by adopting a structure in which the small-diameter cylindrical portion 3c of the cylinder S is detachably fixed to the cylindrical body 1b of the body 1, By assembling only the pump mechanism 3 in advance, it is sufficient to insert the pump mechanism 3 into the cylindrical body 1b of the body 1 in the production line of the ejector, so that efficient assembly can be performed. Further, by adopting the same structure, even when a malfunction such as ejection failure occurs in the pump mechanism 3, it is not necessary to discard all of the ejectors that have been assembled as in the prior art, and the modularized pump mechanism 3 Replacing only this makes it possible to deal with the cost advantage.

  FIG. 2 shows another embodiment of the ejector according to the present invention. The large-diameter cylindrical portion 3a and the small-diameter cylindrical portion 3c constituting the cylinder S can be integrally molded as shown in FIG. 1, but the large-diameter cylindrical portion 3a can be applied to the small-diameter cylindrical portion as shown in FIG. An assembly structure having a stepped opening h that inserts the distal end of 3c and fits into the cylindrical body 1b of the body 1 to sandwich the distal end of the small-diameter cylindrical portion 3c may be integrated or assembled. Is appropriately changed depending on the size of the ejector, the type of liquid, and the like, and is not limited in this respect.

  2 shows the case where the slider 7 is arranged inside the plunger 3f and the plunger 3f is elastically supported by the slider 7. However, the plunger 3f is as shown in FIG. The elastic support member 4 may be directly elastically supported, and this point can be changed as appropriate.

  A trigger type liquid ejector with reduced assembly cost can be supplied.

It is the figure which showed embodiment of the trigger type | mold liquid ejector according to this invention. It is the figure which showed other embodiment of the trigger type | mold liquid ejector according to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 1a Passage 1b Cylinder 2 Operation lever 3 Pump mechanism 3a Large diameter cylinder part 3b 1st cylinder chamber 3c Small diameter cylinder part 3d 2nd cylinder chamber 3e Press head 3f Plunger 4 Elastic support member 5a Sliding part 5b Sliding part 6 Passage 7 Slider t Valve element n Spray nozzle S cylinder

Claims (3)

A trigger-type liquid ejector that sucks, pressurizes, and compresses the liquid in the container with multiple checks of the operation lever and ejects the liquid to the outside through a spray nozzle,
A body provided with an open cylinder that surrounds the outlet end of the passage through which the liquid in the container passes and compartmentally molds the internal space, and an operating lever supported by the body in a swingable manner via a pivot shaft And a pump mechanism having a pressing head connected to the operation lever and pressurizing and compressing the liquid in the container sucked through the outlet end,
The pump mechanism is removable to secure holding by inserting the small diameter cylinder portion made of a combination of the small diameter cylinder portion forming the large-diameter portion and the first cylinder chamber having the same axis inside the cylindrical body of said body and wherein the cylinder and possible inner surface slidably move along the large-diameter portion having a spray nozzle at the tip, the second cylinder chamber while the internal closed space in cooperation with the cylinder It has a pressure head to be formed and a tip portion that forms a valve body at the inlet side end of the spray path of the spray nozzle, and starts to move along the inner surface of the small-diameter cylindrical portion together with the pressure head. A plunger that opens and closes the valve body due to a difference in pressure per unit area based on a cross-sectional area difference of the cylinder chamber is arranged inside the cylinder, and has a modular structure.
Said plunger includes plan and elastic support member for pressing constantly jar body towards the entry end of the ejection path of the spray nozzle, a pair of sliding each slide along said first cylinder and the second cylinder chamber walls And a trigger type liquid ejector characterized by having a passage for sending the liquid to be compressed toward the valve body.   The trigger type liquid ejector according to claim 1, wherein the large-diameter cylindrical portion and the small-diameter cylindrical portion are integrally formed.   The trigger type liquid according to claim 1, wherein the large-diameter cylindrical portion of the cylinder has a stepped opening for inserting the tip of the small-diameter cylindrical portion and fitting the tip of the small-diameter cylindrical portion with the outer peripheral surface of the cylindrical body. Ejector.

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