JP2012179510A - Liquid spray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid spray in which various members such as a suction valve, a discharge valve, a trigger are simplified in the form and assembled simply.SOLUTION: The liquid spray possesses: a liquid spray body 6 in which an injection cylinder 10 is projected from the upper part of a base cylinder 8 of a lower end opening, a rear end closed support cylinder 20 concentrically arranged in the rear part of the injection cylinder 10 communicates with a liquid suction port 24 opened in the base cylinder 8 and a split groove 14 is provided in the front part lower half part of the injection cylinder 10; and a cylindrical piston-like part 28 fitted to the outside of the support cylinder; wherein a trigger 66 is vertically hung through the split groove 14 from a pump body 42 including a pump cylinder 44 slidably fitted to the outside surface of the piston-like part 28 and being in contact with inside of the front part of the injection cylinder 10 to slide, a suction valve body 32 is attached to a cylinder wall front end part of the piston-like part 28 and a valve rod 54 with an elastic umbrella valve 58 is coaxially arranged in the pump cylinder 44.

Description

  The present invention relates to a liquid ejector.

  As this kind of liquid ejector, an injection cylinder is provided from the upper end of the base cylinder, and a liquid ejector main body that projects the cylinder forward from the lower part of the base cylinder, and a suction valve is provided between the lower end of the base cylinder and the cylinder, A discharge valve is formed between the cylinder and the injection cylinder, a nozzle cap is fitted to the front end of the injection cylinder, and a trigger is suspended from the front of the injection cylinder so as to be able to swing, and linked to this trigger. The thing which inserted the plunger in the said cylinder is known (patent document 1).

JP-A-10-174910

  The above-mentioned liquid ejector incorporates a suction valve, discharge valve, trigger, plunger, etc. separately into the liquid ejector body. However, from the viewpoint of saving parts and cost, the liquid ejector body is more rationally installed. A form that can be assembled is desired.

  An object of the present invention is to provide a liquid ejector in which various members such as a suction valve, a discharge valve, and a trigger can be simplified and assembled easily.

The first means is
The injection cylinder 10 protrudes forward from the upper part of the base cylinder 8 at the lower end opening, and the rear end closed support cylinder 20 disposed coaxially in the rear part of the injection cylinder 10 is opened into the base cylinder 8. A liquid ejector body 6 in communication with the mouth 24 and having a slit 14 formed in the lower half of the front portion of the injection cylinder 10;
A mounting cylinder 2 attached to the outside of the base cylinder 8,
A cylindrical piston-like portion 28 fitted to the outside of the support cylinder 20, and
A pump main body 42 including a pump cylinder 44 slidably fitted on the outer surface of the piston-like portion 28 and slidably in contact with the front portion of the injection cylinder 10, is integrated with the lower surface of the pump main body via the split groove 14. And a movable member 40 having a nozzle 66 attached to the front of the pump cylinder 44, and a trigger 66 that is suspended and formed to be movable in parallel with the pump body in the front-rear direction,
A suction valve 34 is formed by the suction valve body 32 provided in the front portion of the piston-like portion 28 and the front end portion of the support cylinder 20,
Inside the pump cylinder 44, a valve rod 54 with a tapered elastic umbrella valve 58 having a large front end is coaxially arranged, and a discharge valve is provided between the tip of the elastic umbrella valve 58 and the inner surface of the pump cylinder 44. Forming 60.

  This means proposes that a trigger 66 and a pump cylinder 44 are provided integrally as shown in FIG. 1 and that a valve rod 54 with an elastic umbrella valve 58 is provided in the pump cylinder 44. As a result, the trigger 66 and the pump cylinder 44 can be assembled to the liquid ejector body 6 as an integrated product. The piston-like portion 28 also serves as at least a piston and a valve body of a suction valve, and has a function as a valve body of an air suction valve in a more preferable illustrated example. Therefore, it can be set as a simple structure as a whole. This will be described later.

The second means has the first means, and the elastic umbrella valve 58 is separated from the valve stem 54 and is engaged with the front surface of the large outer diameter portion 56 formed at the rear portion of the valve stem 54. The elastic umbrella valve 58 is opposed to the front end portion of the piston-like portion 28, and a pump chamber 61 is formed between the elastic umbrella valve 58 and the front end portion of the piston-like portion 28.

  In this means, it is proposed that the elastic umbrella valve 58 is separated from the valve stem 54 of the pump body 42. Thereby, the structure of the pump body part excluding the elastic umbrella valve is further simplified, and the pump body part can be easily formed integrally. Further, since the elastic umbrella valve 58 is opposed to the suction valve element 32 of the suction valve 34 and the pump chamber 61 is formed therebetween, the structure of the entire pump can be simplified and the fluid resistance is low.

According to the invention relating to the first means, the trigger 66 and the pump cylinder 44 can be assembled into the liquid ejector body 6 as a single piece by a single mounting operation.
According to the invention relating to the second means, the pump body portion excluding the elastic umbrella valve 58 can be easily formed.

It is sectional drawing of the liquid ejector which concerns on 1st Embodiment of this invention. It is principal part sectional drawing of the liquid ejector of FIG. It is a side view of one component of the liquid ejector of FIG. It is a side view of the other components of the liquid ejector of FIG. FIG. 10 is a side view of still another component of the liquid ejector of FIG. 1. It is action | operation explanatory drawing in the middle of the retreat of the movable member of the liquid ejector of FIG. It is action | operation explanatory drawing when the said movable member reverse | retreats to back vicinity vicinity.

  1 to 7 show a liquid ejector according to a first embodiment of the present invention. This liquid ejector is formed by the mounting cylinder 2, the liquid ejector main body 6, the piston-like portion 28, and the movable member 40. These members can be formed of a synthetic resin material unless otherwise specified.

  The mounting cylinder 2 is for fitting the container body B to the mouth and neck (see FIG. 6), and a packing 4 is provided inside the mounting cylinder 2.

  The liquid ejector main body 6 has a base tube 8 fitted inside the mounting tube 2, and the injection tube 10 projects forward from the upper end of the base tube 8. The rear lower wall of the injection cylinder 10 closes the upper surface of the base cylinder 8, and a vent hole 12 is opened in a part of the lower wall. A split groove 14 extending from the front end to the rear is formed in the front lower end of the injection cylinder 10.

  The rear part of the injection cylinder 10 is formed with a smaller inner diameter than the front part of the injection cylinder 10 (see FIG. 1), and a locking step 16 is formed between the inner surfaces of the rear part and the front part. .

  A vertical rear wall 18 is formed on the rear end side of the injection cylinder 10, and a support cylinder 20 located in the rear portion of the injection cylinder 10 projects forward from the rear wall. The support cylinder 20 is coaxially arranged with a certain distance A between the injection cylinder 10. From the rear part of the support cylinder 20, a communication cylinder 22 penetrating the rear part of the injection cylinder 10 and opening into the base cylinder 8 is suspended, and a liquid suction port 24 is opened at the lower end of the communication cylinder. The suction pipe 26 is preferably suspended from the liquid suction port.

  The piston-like portion 28 has a cylindrical body 30 whose front portion is a small inner diameter portion, and this cylindrical body is fitted in a liquid-tight manner to the rear portion of the support cylinder 20. The piston-like portion 28 may be formed of an elastic material such as an elastomer. A suction valve body 32 is connected to the inner edge of the front portion of the cylindrical body through a plurality of elastic connecting pieces, and the suction valve body is brought into contact with the front surface of the support cylinder 20 to form a suction valve 34. ing. As shown in FIG. 5, a large-diameter first skirt-like portion 36A is provided around the rear portion of the cylindrical body 30, and a small-diameter second skirt-like portion 36B is provided around the front outer surface of the cylindrical body 30, respectively. .

  The first skirt-shaped portion 36A is in airtight contact with the inner surface of the injection cylinder 10, and an air suction valve 38 is formed by the tip of the first skirt-shaped portion 36A and the inner surface of the injection cylinder 10. .

  The movable member 40 includes a pump body 42, a trigger 66, and a nozzle cap 70.

  The pump body 42 is integrally formed as a whole except for an elastic umbrella valve, which will be described later, for cost reduction (see FIG. 3). The pump main body 42 has a pump cylinder 44 arranged coaxially with the injection cylinder 10. The rear part of the pump cylinder 44 is slidably and liquid-tightly fitted to the second skirt-like part 36B, and the front part of the pump cylinder 44 projects forward to near the front end of the injection cylinder 10. A pressing piece 46 projects backward from one end of the pump cylinder. The pressing piece 46 is formed along the cylinder 30 of the piston-like portion 28 with a gap between the pressing piece 46 and the rear inner surface of the injection cylinder 10.

  As shown in FIG. 3, a slide wall portion 50 protrudes rearward from the front portion (front end portion in the illustrated example) of the pump cylinder 44 through an outward flange 48. The slide wall 50 is slidably fitted to the inner surface of the front portion of the injection cylinder 10. In the illustrated example, a reinforcing rib 49 is formed across the rear surface of the outward flange 48 and the inner surface of the slide wall portion 50. A coil spring 52 formed of metal or the like is interposed between the rear surface of the slide wall portion 50 and the locking step portion 16.

  A valve rod 54 with an elastic umbrella valve 58 is coaxially disposed inside the pump cylinder 44. In the present embodiment, the valve stem 54 is integrally connected to an appropriate position of the pump cylinder 44 (a portion continuing to the outward flange 48 in the illustrated example) via a connecting wall 62 with a communication hole 64. A gap is provided between the connecting wall 62 and the front end of the elastic umbrella valve 58 so as not to prevent deformation of the elastic umbrella valve 58 when the valve is opened.

  Although the illustrated valve rod 54 is formed as a cylinder with a closed front end, it may be formed into a solid rod. The rear portion of the valve stem 54 is formed in a large outer diameter portion 56.

  The illustrated elastic umbrella valve 58 is separate from the valve stem 54 and is formed of an elastic material. As shown in FIG. 4, the elastic umbrella valve 58 is formed by a ring-shaped base portion 58a and a front-end large-diameter tapered portion 58b protruding from the base portion, and the base portion 58a is connected to the front surface of the large outer diameter portion 56 of the valve stem. Is locked. A discharge valve 60 is formed by the tip of the tapered portion 58b and the inner surface of the pump cylinder 44.

  In this embodiment, since the connecting wall 62 between the valve stem 54 and the pump cylinder 44 is provided in front of the elastic umbrella valve 58, the elastic umbrella valve 58 has a large outer diameter of the valve stem 54 from the rear side of the valve rod 54. It is desirable to be able to fit over the portion 56.

  As shown in FIG. 1, the elastic umbrella valve 58 opposes the front end portion of the piston-like portion 28 including the suction valve body 32, and a pump chamber is provided between the elastic umbrella valve 58 and the suction valve body 32. 61 is formed.

  A trigger 66 is integrally suspended from the lower surface of the front portion of the pump body 42. The trigger 66 is positioned on the front side of the mounting cylinder 2 through the split groove 14.

  The illustrated pump body 42 has a mounting cylinder portion 68 extending forward from the front end portion of the pump cylinder 44.

  As shown in FIG. 2, the nozzle cap 70 projects the inner cylinder 74 and the outer cylinder 76 rearward from the rear surface of the front wall with the nozzle hole 72, and the front portion of the valve stem 54 is inserted into the inner cylinder 74. The mounting cylinder portion 68 is fitted in the outer cylinder 76 in a liquid-tight manner. A liquid passage (not shown) is formed between the inner cylinder 74 and the front portion of the valve stem 54. The nozzle cap 70 is preferably provided so that the communication from the discharge valve 60 to the nozzle hole 72 can be opened and closed by a rotating operation.

  In the above configuration, when the liquid ejector is mounted on the mouth and neck of the container body B and the trigger 66 is pulled backward, the movable member 40 including the trigger 66 moves backward in parallel, and discharge is performed as shown in FIG. The valve 60 is opened and the liquid in the pump cylinder 44 is ejected from the nozzle. The figure shows a state during the retreat of the trigger. When the trigger 66 is further retreated than the figure, the first skirt-like portion 36A is pushed by the pressing piece 46 as shown in FIG. And the air suction valve 38 opens. The outside air that has flowed in from the split groove 14 enters the inside of the container body B through the air suction valve 38 and the vent hole 12. Next, when the trigger 66 is released, the movable member 40 moves forward by the forward biasing force of the coil spring 52, the suction valve 34 is opened, and the liquid is sucked up.

  Moreover, since each member of the said liquid ejector is a simple structure, a manufacturing process becomes easy.

2 ... Installation cylinder 4 ... Packing 6 ... Liquid ejector body 8 ... Base cylinder 10 ... Injection cylinder
12 ... Vent hole 14 ... Split groove 16 ... Locking step 18 ... Rear wall 20 ... Support cylinder 22 ... Communication cylinder
24… Liquid inlet 26… Suction pipe
28 ... Piston-like part 30 ... Cylinder 32 ... Valve for suction 34 ... Suction valve
36A ... 1st skirt-like part 36B ... 2nd skirt-like part 38 ... Air suction valve
40 ... movable member 42 ... pump body 44 ... pump cylinder 46 ... pressing piece
48… Outward flange 49… Reinforcing rib
50 ... Slide wall 52 ... Coil spring 54 ... Valve rod 56 ... Large diameter part 58 ... Elastic umbrella valve
58a ... Base 58b ... Tapered portion 60 ... Discharge valve 61 ... Pump chamber 62 ... Connecting wall 64 ... Communication hole
66 ... Trigger 68 ... Mounting cylinder 70 ... Nozzle cap 72 ... Nozzle hole
74 ... Inner cylinder 76 ... Outer cylinder A ... Gap B ... Container body

Claims (2)

A support cylinder (20) for closing the rear end, which protrudes forward from the upper part of the base cylinder (8) at the lower end and projects coaxially in the rear part of the injection cylinder (10), A liquid ejector body (6) in communication with a liquid suction port (24) opened in the cylinder (8), and having a split groove (14) formed in the lower half of the front portion of the injection cylinder (10);
A mounting cylinder (2) attached to the outside of the base cylinder (8);
A cylindrical piston-like portion (28) fitted to the outside of the support cylinder (20);
A pump body (42) including a pump cylinder (44) slidably fitted to the outer surface of the piston-like part (28) and slidably contacting the front part of the injection cylinder (10), from the lower surface of the pump body It has a trigger (66) that is integrally suspended via the split groove (14) and is movable in parallel with the pump body in the front-rear direction, and a nozzle cap (70) attached in front of the pump cylinder (44). A movable member (40),
A suction valve (34) is formed by the suction valve element (32) provided in the front part of the piston-like part (28) and the front end part of the support cylinder (20),
In the pump cylinder (44), a valve rod (54) with a tapered elastic umbrella valve (58) having a large front end is coaxially arranged, and the tip of the elastic umbrella valve (58) and the pump cylinder ( 44) A liquid ejector characterized in that a discharge valve (60) is formed between the inner surface of 44). Separately from the valve stem (54), the elastic umbrella valve (58) is engaged with the front surface of the large outer diameter portion (56) formed at the rear of the valve stem (54), and the elastic umbrella valve (58 ) Is opposed to the front end portion of the piston-like portion (28), and a pump chamber (61) is formed between the elastic umbrella valve (58) and the front end portion of the piston-like portion (28). The liquid ejector according to claim 1.