JP2011212572A - Trigger type liquid spray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trigger type liquid spray comprising a moving member B3 provided with a discharge valve 46 in a flow passage and loaded movably up and down in an upward biasing state and an operating member B4 turning centering an axially attached part by pulling a trigger 62 and pushing down the moving member B3 against upward biasing force, in which a spurt of a liquid is possible for a certain time even after pulling the trigger.SOLUTION: A cylinder B2 lower part is followed by an auxiliary cylinder B5, at the same time an auxiliary piston 71 with a suction valve 70 sliding inside the auxiliary cylinder B5 is provided in the upward biasing state, and the inside of the cylinder B2 is pressurized by the lowering of a piston 40, by which a discharge valve 46 opens and a pressurized liquid spouts out from an exhaust nozzle 44. At the same time, the auxiliary piston 71 lowers against the upward biasing force, when the upward biasing force of the auxiliary piston 71 turns larger than valve 48 contact pressure of the discharge valve 46, the auxiliary piston 71 moves upwards before the discharge valve 46 closes, and the jet of the liquid from the exhaust nozzle 44 is carried out until the rising of the auxiliary piston 71 finishes.

Description

  The present invention relates to a trigger type liquid ejector.

  Various trigger type liquid ejectors have been proposed. (For example, see Patent Document 1)

  The trigger-type liquid ejector described in Patent Document 1 has a stem that is erected so as to be able to be pushed in an upward biased state, a finger hooking portion and a pressing portion that are disposed on the front side of the stem, and the rear side of the stem. A trigger that can be swung around a rocking shaft, a pump that operates when the stem is pushed down by a push-down portion as the trigger rocks, and a nozzle. Further, as the pump, a cylinder, a piston having a double cylinder structure disposed inside the cylinder and in sliding contact with the inner peripheral surface of the cylinder, a core rod extending along the central axis, and a cylinder It is comprised with the accommodated coil spring and the spherical valve body.

JP 2009-131814 A

  In this type of conventional trigger type liquid ejector, when a trigger is pulled, a certain amount of liquid is ejected in a short time (in an instant). For this reason, for example, when spraying on a wall surface, only a small area can be obtained per pulling of the trigger.

  The present invention has been made in view of the above points, and proposes a trigger type liquid ejector capable of ejecting liquid for a while after the trigger is pulled. Further, the present invention proposes a liquid ejector that has the advantage that it can be formed with as little change in structure as possible as compared with the conventional trigger type liquid ejector of this type, can be easily manufactured, and as a result can be manufactured inexpensively.

  The first means is configured as follows. That is, it has a mounting base B1 that fits to the container body neck 12 and fixes the cylinder B2, and a stem 41 that has a piston 40 that slides inside the cylinder B2, and a jet outlet 44 at the tip from inside the stem 41. A discharge valve 46 is provided in the flow path leading to and is mounted so as to be rotatable about a shaft-attached portion with respect to the mounting base B1 and an operating member B3 mounted so as to be vertically movable in an upward biased state. In addition, by pulling the trigger 62, it rotates around the pivoting part, and is provided with an operation member B4 that pushes down the operating member B3 against the upward biasing force, and an auxiliary cylinder B5 is continuously provided at the lower part of the cylinder B2, An auxiliary piston 71 with a suction valve 70 that slides in the auxiliary cylinder B5 is provided in an upward biased state, and when the piston B is lowered, the inside of the cylinder B2 is pressurized, so that the discharge valve 46 is opened and the pressurized liquid is spouted out. 44, and at the same time, the auxiliary piston 71 resists the upward biasing force. The upper biasing force of the auxiliary piston 71 is made larger than the pressure contact pressure force of the valve body 48 of the discharge valve 46, the auxiliary piston 71 rises before the discharge valve 46 is closed, and the auxiliary piston 71 is lifted from the outlet 44 until the auxiliary piston 71 finishes rising. The liquid was ejected.

  The second means is configured as follows. That is, in the first means, the discharge valve 46 is a pressure accumulation type discharge valve 46.

  The third means was configured as follows. That is, in any one of the first means and the second means, the auxiliary cylinder B5 is mounted by tightly fitting the upper connecting cylinder portion 74 to the connecting cylinder 34 at the lower end of the cylinder B2. A pipe 76 for siphoning was fitted to the lower connecting cylinder 75 of B5.

  The fourth means is configured as follows. That is, in any one of the first to third means, the auxiliary piston 71 has a sliding portion 71a sliding on the inner periphery of the auxiliary cylinder B5 on the outer peripheral surface, and the inner peripheral surface. It has an annular shape with a taper-shaped suction valve seat 71b at the bottom, and a suction valve 70 is formed by a ball-shaped valve body 77 placed on the suction valve seat 71b. The auxiliary piston 71 and the bottom surface of the auxiliary cylinder B5 The auxiliary piston 71 was always biased upward by the auxiliary coil spring s1 interposed between the auxiliary piston spring 71 and the auxiliary coil spring s1.

  According to the present invention, since the liquid is ejected from the ejection port 44 until the raising of the auxiliary piston 71 that is lowered by the lowering of the piston 40 is finished, the liquid ejection time can be kept long, and the structure of the suction valve Since only the auxiliary cylinder B5 incorporating the auxiliary piston 71 with 70 is added, it can be formed with very little structural change compared to the conventional product, and it has the advantage of being easy to manufacture and inexpensive to manufacture.

  When the discharge valve 46 is a pressure-accumulation type discharge valve 46, a liquid ejector with good liquid drainage is obtained.

  When the auxiliary cylinder B5 is installed by tightly fitting the upper cylinder part 74 to the cylinder 34 at the lower end of the cylinder B2, the auxiliary pipe B76 is fitted to the lower cylinder part 75 of the auxiliary cylinder B5. There is an advantage that cylinder B5 can be assembled more easily.

  The auxiliary piston 71 is provided with a sliding portion 71a that slides on the inner periphery of the auxiliary cylinder B5 on the outer peripheral surface, and has an annular shape with a taper-like suction valve seat 71b at the lower portion of the inner peripheral surface. The suction valve 70 is formed by the ball-shaped valve element 77 placed on the upper side, and the auxiliary piston 71 is always urged upward by the auxiliary coil spring s1 interposed between the auxiliary piston 71 and the inner bottom surface of the auxiliary cylinder B5. In this case, there are advantages that the structure is extremely simple, the number of occupied parts is small, and the assembling operation is easy.

It is sectional drawing of a trigger type liquid ejector. (Example 1) It is sectional drawing of the state which pulled the trigger of the trigger type liquid ejector. (Example 1) It is explanatory drawing explaining the effect | action of an auxiliary cylinder part. (Example 1)

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

  1 to 3 show an example of the trigger type liquid ejector 1, and the trigger type liquid ejector 1 includes a container body A and a pump B.

  In the container A, the mouth and neck 12 is erected from the trunk 10 via the shoulder 11.

  The pump B includes a mounting base B1, a cylinder B2, an operating member B3, an operating member B4, and an auxiliary cylinder B5.

  The mounting base B1 includes a mounting cap 20 having a flange-like top wall 20b extending from the upper end of a peripheral wall 20a screwed to the outer periphery of the mouth-and-neck portion 12, and a fitting cylinder erected from the inner peripheral edge of the top wall 20b of the mounting cap 20 Comprises a pair of support plates 22a extending obliquely upward from the rear portion of the fitting cylinder portion 21 and the top wall 20b of the mounting cap 20, and a connection plate 22b for connecting the support plates 22a. A shaft support portion 22 that supports the operation member B4 is provided.

  The cylinder B2 has a cylindrical shape with upper and lower ends opened, and the upper part of the peripheral wall part 30 is fitted and fixed in the fitting cylindrical part 21, and the flange 31 protruding from the outer periphery of the peripheral wall part 30 is attached to the top wall 20b of the mounting cap 20. It is fitted to the back surface and fixed to the mounting base B1. Further, a rod member 32 is fitted inside. The rod member 32 is formed with a lower portion having a large diameter and an upper portion having a small diameter, and a plurality of ribs 33 projecting in the circumferential direction from the lower end portion of the outer periphery of the large diameter portion are fitted to the inner bottom portion of the cylinder B2 so that liquid can be circulated. The upper end opening of the cylinder B2 and the upper end opening of the fitting cylinder portion 21 are inserted into the stem 41 so as to be movable up and down.

  The actuating member B3 includes a stem 41 having an annular piston 40 that slides in the cylinder B2 at its lower end, and is attached to a nozzle 43 that is fitted to the tip of an injection cylinder 42 that extends forward from the upper end of the stem 41. The spout 44 is opened. Further, a pressure accumulation valve type discharge valve 46 constituted by a valve member 45 is provided in a flow path from the stem 41 to the ejection port 44. The valve member 45 includes a plate-like valve body 48 that presses against a valve seat 47 formed at the distal end portion in the injection cylinder 42, and is fitted to the distal end portion of the injection cylinder 42, and has a flow channel groove 49 around it. A recessed horizontal columnar fixing portion 50 is provided, and the valve body 48 and the fixing portion 50 are connected by a connecting rod 52 provided with a ring-shaped elastic portion 51 at an intermediate portion. Further, a guide rod 53 projects from the rear surface of the valve body 48 into the injection cylinder 42.

  The actuating member B3 is always urged upward by a coil spring s interposed between the lower surface of the piston 40 and the upper surface of the rib 33 of the rod member 32.

  The operating member B4 is attached to the rear portions of both side plates 61a at the upper portions on both sides of the shaft support portion 22 of the mounting base B1, and the rear side plates 61a extending from the shaft mounting position to the both sides of the front portion of the injection cylinder 42 are rear portions. And a trigger 62 in which a pair of side plates 62a vertically suspended from the front lower surface of both side plates 61a of the pressing portion 61 is connected to the front of the stem 41 by a front plate 62b. I have. On the inner surface of both side plates 61a of the pressing portion 61, there are protruding protrusions 63 that press the upper surface of the horizontal columnar pressed protrusions 54 protruding on both sides of the upper portion of the stem 41. The projection 63 presses the pressed projection 54, the stem 41 is lowered, and the actuating member B3 is lowered.

  The auxiliary cylinder B5 includes an auxiliary piston 71 with a suction valve 70 that is connected to the lower part of the cylinder B2. In the illustrated example, the upper member 72 and the lower member 73 form an auxiliary cylinder B5, and the upper member 72 has a cylindrical shape with a lower end opening with the top wall extending from the upper edge of the peripheral wall. The upper connecting cylinder portion 74 erected by connecting the two is fluid-tightly connected to the connecting cylinder 34 at the lower end of the cylinder B2 so that the cylinder B2 and the auxiliary cylinder B5 communicate with each other. The lower member 73 has a cylindrical shape with an upper end opening extending from the lower end edge of the peripheral wall, and the peripheral wall is liquid-tightly fitted to the outer periphery of the upper member 72 to form the auxiliary cylinder B5. Further, a lower connecting cylinder portion 75 having an upper end opened on the bottom wall is suspended, and a pipe 76 is connected to the lower connecting cylinder portion 75 to communicate the inside of the container body A and the auxiliary cylinder B5.

  The auxiliary piston 71 has a pair of upper and lower skirt-like sliding portions 71a that slide on the auxiliary cylinder B5 on the outer periphery, and has an annular shape with a taper-like suction valve seat 71b at the lower inner periphery. . The suction valve 70 is composed of a ball-shaped valve body 77 placed on the suction valve seat 71b. The auxiliary piston 71 is always urged upward by an auxiliary coil spring s1 interposed therebelow. The upward biasing force of the auxiliary piston 71 is set larger than the pressure contact force of the valve body 48 of the discharge valve 46. In order to make this situation appear in this example, the elastic force of the auxiliary coil spring s1 is basically applied to the valve body 48 of the discharge valve 46 in consideration of the sliding frictional force of the auxiliary piston 71 and the like. What is necessary is just to make it larger than the elastic force of the ring-shaped elastic part 51 for press-contact.

  A case where the trigger type liquid ejector 1 configured as described above is used will be described. When the trigger 62 is retracted from the state shown in FIG. 1, the pressing portion 61 rotates around the pivoting portion, and the pressing projection 63 pushes down the pressed projection 54, whereby the operating member B3 is lowered and the inside of the cylinder B2 is pressurized. Is done. When this pressurized state reaches a certain pressure, the discharge valve 46 opens and the liquid is ejected from the ejection port 44 overcoming the pressure contact force of the valve body 48 by the ring-shaped elastic portion 51. On the other hand, substantially simultaneously, the auxiliary piston 71 is lowered against the upward biasing force of the auxiliary coil spring s1. The applied pressure in the cylinder B2 due to the lowering of the piston 40 is absolutely larger than the pressure contact force of the valve body 48 by the ring-shaped elastic portion 51 and the upward biasing force of the auxiliary coil spring s1, The auxiliary piston 71 can be lowered almost simultaneously.

  In this state, as shown in FIG. 2, the discharge valve 46 is open and the liquid is ejected, and the trigger 62 is pulled backward. Since the upward biasing force of the auxiliary piston 71 is larger than the pressure contact force of the valve body 48 of the discharge valve 46, the auxiliary piston 71 starts to rise before the discharge valve 46 is closed from this state, and the auxiliary piston 71 reaches the highest position. Until the discharge valve 46 is opened, the liquid continues to be ejected.

  Such an operation will be described with reference to a partially enlarged view of the auxiliary cylinder B5 in FIG. 3. In FIG. 3A, the auxiliary piston 71 is connected to the auxiliary coil spring in a state where the inside of the cylinder B2 is not pressurized. The suction valve 70 is pushed up to the highest position by s1, and the suction valve 70 is closed. When the inside of the cylinder B2 is pressurized from this state, the pressurized liquid in the cylinder B2 is pressed into the auxiliary cylinder B5 against the upward biasing force of the auxiliary piston 71 as shown in FIG. At this time, liquid is ejected from the ejection port 44 at the same time. Next, as shown in FIG. 3C, the auxiliary piston 71 is lifted by the upward biasing force of the auxiliary coil spring s1, but since the upward biasing force of the auxiliary piston 71 is larger than the pressure contact force of the valve body 48 of the discharge valve 46, the auxiliary piston 71 is lifted. The discharge valve 46 is open until 71 reaches the highest position, and the liquid ejection time during that time can be extended.

  After the auxiliary piston 71 reaches the highest position, the discharge valve 46 is closed and the liquid ejection stops. Next, when the pulling force of the trigger 62 is released, the actuating member B3 is lifted by the coil spring s, and the trigger 62 is also rotated and restored to the original state accordingly. At that time, since the piston 40 moves up in the cylinder B2, the pressure in the cylinder B2 becomes negative, and the suction valve 70 is opened in the cylinder B2 that has become negative pressure, and the liquid in the container A is introduced.

  In addition, although the said example showed the example which used the pressure-accumulation type as a discharge valve, it is not restricted to this, For example, the valve seat which protruded in the stem, and the ball-shaped valve mounted on this valve seat The present invention can also be applied when a discharge valve constituted by a body is employed.

1 ... Trigger type liquid ejector A ... Container body
10 ... trunk, 11 ... shoulder, 12 ... mouth and neck B ... pump
B1 ... Mounting base
20: Mounting cap, 20a: Perimeter wall, 20b: Top wall, 21 ... Fitting cylinder, 22 ... Shaft support,
22a: Support plate, 22b: Connection plate
B2 ... Cylinder
30 ... peripheral wall part, 31 ... flange, 32 ... bar member, 33 ... rib, 34 ... connecting cylinder
B3 ... Actuating member
40 ... Piston, 41 ... Stem, 42 ... Injection cylinder, 43 ... Nozzle, 44 ... Jet, 45 ... Valve member, 46 ... Discharge valve, 47 ... Valve seat, 48 ... Valve body, 49 ... Channel groove, 50 ... Fixed part,
51 ... Ring-shaped elastic part, 52 ... Connecting rod, 53 ... Guide rod, 54 ... Pressed protrusion
B4 ... Control member
61 ... Pressing part, 61a ... Side plate, 61b ... Connecting plate part, 62 ... Trigger, 62a ... Side plate,
62b… Front plate, 63… Pressing protrusion
B5 ... Auxiliary cylinder
70 ... Suction valve, 71 ... Auxiliary piston, 71a ... Sliding part, 71b ... Suction valve seat,
72 ... Upper member, 73 ... Lower member, 74 ... Upper connecting cylinder, 75 ... Lower connecting cylinder, 76 ... Pipe, 77 ... Ball-shaped valve body s ... Coil spring
s1… Auxiliary coil spring

Claims (4)

  It has a mounting base B1 that is fitted to the container body neck 12 to fix the cylinder B2, and a stem 41 that has a piston 40 that slides in the cylinder B2, and reaches from the inside of the stem 41 to the jet outlet 44 at the tip. A discharge valve 46 is provided in the flow path, and the operation member B3 is mounted so as to be movable up and down in an upward biased state, and is mounted so as to be rotatable about the shaft mounting portion with respect to the mounting base B1. By pulling the trigger 62, it is pivoted around the pivoted part and is equipped with an operating member B4 that pushes down the actuating member B3 against the upward biasing force, and an auxiliary cylinder B5 is connected to the lower part of the cylinder B2, and the auxiliary cylinder An auxiliary piston 71 with a suction valve 70 that slides inside B5 is provided in an upward biased state, and when the inside of the cylinder B2 is pressurized by the lowering of the piston 40, the discharge valve 46 opens and the pressurized liquid is discharged from the jet port 44. At the same time, the auxiliary piston 71 descends against the upward biasing force. The upward biasing force of the auxiliary piston 71 is made larger than the pressure contact force of the valve body 48 of the discharge valve 46, the auxiliary piston 71 rises before the discharge valve 46 is closed, and the liquid is ejected from the outlet 44 until the auxiliary piston 71 finishes rising. A trigger type liquid ejector characterized by being configured to perform the above.   2. The trigger type liquid ejector according to claim 1, wherein the discharge valve is a pressure accumulation type discharge valve.   The upper connecting cylinder portion 74 is closely fitted to the connecting cylinder 34 at the lower end of the cylinder B2, and the auxiliary cylinder B5 is attached, and the suction pipe 76 is attached to the lower connecting cylinder portion 75 of the auxiliary cylinder B5. Item 3. The trigger type liquid ejector according to any one of items 2 to 3.   The auxiliary piston 71 is provided with a sliding portion 71a that slides on the inner periphery of the auxiliary cylinder B5 on the outer peripheral surface, and has an annular shape with a taper-like suction valve seat 71b at the lower portion of the inner peripheral surface. The suction valve 70 is formed by the ball-shaped valve element 77 placed on the upper side, and the auxiliary piston 71 is always urged upward by the auxiliary coil spring s1 interposed between the auxiliary piston 71 and the inner bottom surface of the auxiliary cylinder B5. The trigger type liquid ejector according to any one of claims 1 to 3.