JP2020158174A - Trigger-type liquid ejector - Google Patents

Abstract

To provide a trigger-type liquid ejector that a spring member is hardly weakened and can prevent malfunction of an operating lever and deterioration of appearance.SOLUTION: A trigger type liquid ejector of the present invention includes an ejector body 2 mounted on a container A, an operation lever 4 that is held swingably in a front-rear direction with respect to the ejector body 2, and a spring member 5 that energizes the operation lever 4 toward a front. The spring member 5 has a fixing part 5d located in the front of a swing center C of the operating lever 4 and fixedly held by the ejector body 2, and a projection 5e located below the fixing part 5d. The operating lever 4 has: an outer wall 4b; an inclination part 4e provided with a gap s with respect to the outer side wall 4b, inclined from a lower side to an upper side and from a rear side to a front side, and energized by the contact of the projection 5e; and at least one rib 4f projecting laterally inward from the outer side wall 4b.SELECTED DRAWING: Figure 1

Description

The present invention relates to a trigger type liquid ejector which is mounted on a container containing a content liquid and ejects the content liquid by swinging an operation lever in the front-rear direction.

For containers containing liquids such as mold removers, detergents, air fresheners, repellents, pesticides, and chemicals, they are attached to the mouth of the container and provided on the ejector body by swinging the operation lever in the front-back direction. Trigger-type liquid ejectors that drive a pump to inject the liquid in the container into a linear, mist-like, or foam-like form are often used (see, for example, Patent Document 1), enabling efficient supply of the content liquid. I have to.

As shown in FIG. 3, the conventional trigger type liquid ejector 100 has an ejector main body 102 that is formed in a substantially L shape in a side view and is mounted on the container 101, and a cover portion 103 that covers the upper part of the ejector main body 102. A roughly C-shaped bearing portion 104 provided on both sides of the cover portion 103, a spring member 105 connected to both sides of the cover portion 103 in front of the bearing portion 104, and a protrusion located at the tip of the spring member 105. (Spring-side protrusion) 106, an operation lever 107 that is pivotally supported by the bearing portion 104 and swings in the front-rear direction with respect to the ejector main body 102, and a protrusion (provided on the operation lever 107 that abuts on the spring-side protrusion 106). Lever side protrusion) 108 is provided. Then, when the operating lever 107 is swung rearward, the rear end portion of the lever side protrusion 108 presses the front wall of the spring side protrusion 106 to elastically deform the spring member 105, and the operating lever is elastically deformed by the elastic force generated thereby. The 107 is urged forward.

JP-A-2017-170281

When the operating lever 107 is swung back and forth in such a trigger type liquid ejector 100, the spring side protrusion 106 is restrained from moving in the front-rear direction by the lever side protrusion 108, so that the spring side protrusion 106 is on the lever side. It will move in the front-rear direction according to the protrusion 108. For this reason, when the operating lever 107 tries to expand the range of swinging in the front-rear direction as in the case of ejecting a relatively large amount of the content liquid, the spring side protrusion 106 also moves significantly in the front-rear direction. , The amount of deformation of the spring member 105 has increased, and this has become easy to settle.

As a device for preventing such settling of the spring member 105, a trigger type liquid ejector 200 as shown in FIG. 4 can be considered. The trigger type liquid ejector 200 has the same configuration as the container 101, the ejector main body 102, the cover portion 103, the bearing portion 104, the spring member 105, the spring side protrusion 106, and the operation lever 107 described above, and is the container 201 and the ejector. The main body 202, the cover portion 203, the bearing portion 204, the spring member 205, the spring side protrusion 206, and the operating lever 207 are provided, while the operating lever 207 is provided with an inclined portion 208 as shown in FIG. 5 in place of the lever side protrusion 108. It is a spring. When such an inclined portion 208 is provided, when the operating lever 207 is swung rearward, the spring-side protrusion 206 that abuts on the inclined portion 208 moves rearward together with the inclined portion 208 and becomes the inclined portion 208. Slides the contact surface of the lever 207 to move forward relative to the inclined portion 208 (in FIG. 4, the operating lever 207 shown by the solid line is in the state before swinging, and the broken line is after swinging. State). That is, when the operating lever 107 of the trigger type liquid ejector 100 shown in FIG. 3 and the operating lever 207 of the trigger type liquid ejector 200 shown in FIG. 4 are similarly swung rearward (shown in each figure). As described above, the amount of movement of the operating lever 107 and the operating lever 207 in the front-rear direction is L), and the amount of movement of the spring-side protrusion 106 shown in FIG. 3 is Lb. The amount of movement La in the front-back direction of 206 is smaller. As described above, the trigger type liquid ejector 200 shown in FIG. 4 has an advantage that the amount of deformation of the spring member 205 is smaller than that of the trigger type liquid ejector 100 shown in FIG. ..

By the way, as shown in FIG. 5, when the inclined portion 208 is provided on the operating lever 207, the width of the operating lever 207 needs to be widened to some extent in consideration of operability and design. In this case, the side of the operating lever 207 is lateral. A gap 210 as shown in the enlarged view of FIG. 5B is formed between the outer wall 209 located on the outer side and the inclined portion 208. If there is such a gap 210, when the spring side protrusion 206 slides on the contact surface with the inclined portion 208, the tip of the spring side protrusion 206 may fit into the gap 210, whereby the operating lever may be fitted. There is concern that it will affect the movement of 207.

On the other hand, as shown in FIG. 6, the gap 210 can be eliminated by increasing the thickness of one or both of the outer wall 209 and the inclined portion 208 and connecting the outer wall 209 and the inclined portion 208. However, in this case, the thickening of the outer wall 209 may cause sink marks on the outer surface of the outer wall 209 and impair the appearance. Further, since the inclined portion 208 itself becomes thick, there is a concern that sink marks may occur on the contact surface of the inclined portion 208 with the spring side protrusion 206, which may affect the slidability with the spring side protrusion 206. To.

An object of the present invention is to solve such a problem, and a trigger type capable of preventing the spring member from being worn out more than before, and preventing the operation lever from malfunctioning and deterioration of appearance. It is intended to provide a liquid ejector.

In the present invention, an ejector main body mounted on a container, an operation lever held so as to be swingable in the front-rear direction with respect to the ejector main body, and a spring member for urging the operation lever forward. A trigger-type liquid ejection that drives a pump provided in the ejector main body by swinging the operating lever in the front-rear direction to suck, pressurize, and pump the content liquid contained in the container to eject it to the outside world. It ’s a vessel,
The spring member has a fixing portion located in front of the swing center of the operating lever and fixedly held by the ejector main body, and a protrusion located below the fixing portion.
The operating lever is located on the lateral outer side of the protrusion and on the lateral inner side of the outer wall, and is provided with a gap from the outer wall, and faces upward from below. A trigger-type liquid ejector having an inclined portion inclined from the rear to the front and urged by the contact of the protrusion, and at least one rib protruding laterally inward from the outer wall. ..

Further, the present invention includes an ejector main body mounted on a container, an operation lever that is held swingably in the front-rear direction with respect to the ejector main body, and a spring member that urges the operation lever forward. A trigger type liquid that drives a pump provided in the ejector main body by swinging the operation lever in the front-rear direction to suck, pressurize, and pump the content liquid contained in the container to eject it to the outside world. It ’s an ejector,
The spring member has a fixing portion located in front of the swing center of the operating lever and fixedly held by the ejector main body, and a protrusion located below the fixing portion.
The operating lever is located laterally inside the protrusion and laterally outside the inner wall, and is provided with a gap from the inner wall, and faces upward from below. It is also a trigger type liquid ejector having an inclined portion inclined from the rear to the front and urged by the contact of the protrusion, and at least one rib protruding laterally and outward from the inner side wall. ..

In the trigger type liquid ejector of the present invention, the protrusion provided on the spring member comes into contact with the inclined portion of the operating lever. That is, when the operating lever is swung backward, the protrusion moves backward together with the inclined portion so as to move forward relative to the inclined portion, so that the amount of movement in the front-rear direction is larger than before. The amount of deformation of the spring member can be reduced, and the spring member is less likely to settle. Further, since there is a gap between the outer wall of the operating lever and the inclined portion, it is possible to prevent deterioration of the appearance due to sink marks. Further, since it is provided with at least one rib protruding laterally inward from the outer wall, the protrusion of the spring member does not fit into this gap, and the operating lever can be operated satisfactorily.

Further, the above-mentioned inclined portion may be provided when it has an inner side wall located laterally inside the protrusion of the spring member, but at this time, if there is a gap between the inner side wall and the inclined portion, this There is a risk that the protrusions of the spring member will fit into the gap. In this case, by providing at least one rib protruding from the inner side wall toward the lateral side, the protrusion is prevented from being fitted into the gap, and the operating lever can be operated satisfactorily.

It is a figure which showed the relationship between the operation lever and the spring member with respect to one Embodiment of the trigger type liquid ejector which follows this invention. Regarding the operation lever in FIG. 1, (a) is a partial cross-sectional view taken along the line AA shown in (c), (b) is a side view, and (c) is a rear view. It is a figure which showed the relationship between the operation lever and a spring member in the conventional trigger type liquid ejector. It is a figure which showed the trigger type liquid ejector which can suppress the sagging of a spring member with respect to the trigger type liquid ejector shown in FIG. Regarding the operation lever shown in FIG. 4, (a) is a partial cross-sectional view taken along the line BB shown in (b), and (b) is a rear view. It is a rear view which showed the modification of the operation lever shown in FIG.

Hereinafter, an embodiment of the trigger type liquid ejector according to the present invention will be described with reference to FIG. In the present specification and the like, "upper" is the side where the cover portion indicated by reference numeral 24 is located with respect to the mounting cap indicated by reference numeral 21 in FIG. 1, and "lower" is the opposite side. Further, "front" is the side (left side in FIG. 1) where the nozzle indicated by reference numeral 3 is located with respect to the vertical cylinder portion indicated by reference numeral 22a, and "rear" is the opposite side (right side in FIG. 1). is there. Further, the "side" is a left-right direction (direction perpendicular to the paper surface in FIG. 1) when viewed from the front to the rear.

Reference numeral 1 shown in FIG. 1 indicates an embodiment of a trigger type liquid ejector according to the present invention. The trigger type liquid ejector 1 roughly includes an ejector main body 2, a nozzle 3, an operating lever 4, a spring member 5, and a shroud 6.

The ejector main body 2 is provided with a mounting cap 21 for fixing and holding the trigger type liquid ejector 1 at the mouth of the container A. Although not shown, a male screw portion is provided on the outer peripheral surface of the mouth portion of the container A, and a female screw portion is provided on the inner peripheral surface of the mounting cap 21. Then, by rotating the mounting cap 21 with respect to the mouth portion and screwing the female screw portion with respect to the male screw portion, the ejector main body 2 is fixedly held in the container A. In addition, in order to fix and hold the ejector main body 2 in the container A, another means such as undercut may be adopted.

Further, the ejector main body 2 includes a passage portion 22 provided with an internal passage for passing the content liquid contained in the container A. The passage portion 22 includes a vertical cylinder portion 22a extending from the lower side to the upper side and a horizontal cylinder portion 22b extending from the upper end of the vertical cylinder portion 22a toward the front, and is provided above and below the vertical cylinder portion 22a. A tubular portion 22c with an open front is provided in the middle portion in the direction. A cylinder 22d is fitted and held inside the tubular portion 22c.

Inside the cylinder 22d, a piston member 23 that slides airtightly and liquid-tightly with respect to the inner peripheral surface of the cylinder 22d is provided. The cylinder 22d and the piston member 23 function as a pump that introduces the content liquid contained in the container A into the internal passage of the passage portion 22 and further ejects it to the outside world, and moves the piston member 23 in the front-rear direction. The content liquid can be sucked, pressurized, and pumped. Here, the front end of the piston member 23 is provided with a connecting recess 23a that connects to the operating lever 4.

Further, the ejector main body 2 includes a cover portion 24 located above the horizontal cylinder portion 22b. A C-shaped bearing portion 24a with an open rear portion is provided on both sides of the cover portion 24.

A nozzle 3 attached to the horizontal cylinder portion 22b is provided in front of the cover portion 24. Although not shown, the front end of the nozzle 3 is provided with a spout for ejecting the content liquid through the internal passage of the passage portion 22 and a collision plate provided in front of the spout. The collision plate changes the ejection form of the content liquid by colliding the content liquid from the ejection port, and by appropriately selecting the shape, the content liquid can be atomized or foamed and ejected to the outside world. it can. The ejection plate is arbitrarily provided, and the content liquid may be ejected directly from the ejection port. Further, the nozzle 3 is rotatably provided with respect to the horizontal cylinder portion 22b, and the nozzle 3 can be opened and closed according to the rotation angle.

An operation lever 4 is attached to the bearing portion 24a of the cover portion 24. As shown in FIG. 2, the operation lever 4 includes a front wall 4a that is located in the front and is a portion on which a finger is hung during operation, and an outer wall 4b that is located on both sides of the front wall 4a. .. The outer wall 4b of the present embodiment is located laterally outward with respect to the protrusion 5e of the spring member 5, which will be described later, when assembled as a trigger type liquid ejector. Further, a pair of inner side walls 4c are provided on the lateral inner side of the upper part of the outer wall 4b as shown in the enlarged view of FIG. 2C. The inner side wall 4c is located on the lateral inner side of the protrusion 5e when assembled as a trigger type liquid ejector. A pair of recesses 4d that open rearward are provided between the pair of outer walls 4b and the inner wall 4c.

The recess 4d is provided with an inclined portion 4e whose rear surface is inclined from the rear to the front from the lower side to the upper side. The inclined portion 4e of the present embodiment is curved so as to be separated from the protrusion 5e of the spring member 5 described later (curved so as to approach the front wall 4a), but the shape is not limited to this, and the protrusion is not limited to this shape. It may be curved so as to approach 5e, or it may extend substantially flat. A gap s extending in the vertical direction is formed between the outer wall 4b and the inclined portion 4e. The gap s is provided with a plate-shaped rib 4f that projects from the inner side surface of the outer wall 4b toward the side inward and extends to the side edge of the inclined portion 4e. In this embodiment, as shown in the enlarged view of FIG. 2C, three ribs 4f are provided, and the gap s is divided into a plurality of ribs 4f by these ribs 4f. Further, the rib 4f is provided so as to project rearward from the rear surface of the inclined portion 4e, and in the present embodiment, the rear end portion of the rib 4f is aligned with the rear end portion of the outer wall 4b. It protrudes to the position.

Further, as shown in FIG. 2, the operation lever 4 is provided with a pair of shaft portions 4g which form a columnar shape and project laterally outward in the upper part of the front wall 4a. The shaft portion 4g is supported by the bearing portion 24a as shown in FIG. 1, and the operating lever 4 can swing in the front-rear direction around the center (swing center C) of the shaft portion 4g. .. A pair of connecting shaft portions 4h to be inserted into the connecting recess 23a of the piston member 23 are provided at the rear portion of the outer wall 4b.

Further, the cover portion 24 includes a pair of spring members 5 provided on both lateral sides in front of the bearing portion 24a. The spring member 5 includes a small-diameter inner curved piece 5a and a large-diameter outer curved piece 5b, and the inner curved piece 5a and the outer curved piece 5b are connected by a lower curved portion 5c and an upper curved portion 5d. There is. In the spring member 5 of the present embodiment, the upper curved portion 5d is integrally connected to the cover portion 24, and the upper curved portion 5d serves as a fixed portion and is fixedly held to the cover portion 24. Further, a protrusion 5e is provided in the lower portion of the outer curved piece 5b so as to project outward and enter the inside of the recess 4d so that the tip abuts on the inclined portion 4e.

The shroud 6 covers most of the ejector main body 2 and the upper part of the operating lever 4 and the spring member 5. The shroud 6 of the present embodiment is fitted and held in the ejector main body 2 so as to slide from the rear to the front with respect to the ejector main body 2.

In the trigger type liquid ejector 1 having such a form, when a finger is placed on the front wall 4a and a force is applied backward, the operating lever 4 swings backward around the swing center C and is connected. The piston member 23 moves rearward by the connecting shaft portion 4h inserted into the recess 23a. At this time, the protrusion 5e that abuts on the inclined portion 4e moves backward as shown by the broken line in FIG. 1, whereby the spring member 5 is elastically deformed so that the inner curved piece 5a and the outer curved piece 5b are bent. On the other hand, when the force applied to the front wall 4a is released, the elastically deformed spring member 5 is restored, and the restoring force at that time acts on the inclined portion 4e via the protrusion 5e. The piston member 23 swings forward around the swing center C and moves forward. By repeating applying and releasing the force to the front wall 4a in this way, the piston member 23 can move in the front-rear direction to drive the pump, so that the content liquid contained in the container A can be moved to the nozzle 3. It can be ejected from the spout.

By the way, when the operating lever 107 of the conventional trigger type liquid ejector 100 shown in FIG. 3 is swung by the movement amount L in the front-rear direction, the spring side protrusion 106 is moved backward by the lever side protrusion 108. Move with it. On the other hand, in the trigger type liquid ejector 1 shown in FIG. 1, when the operating lever 4 is swung in the front-rear direction, the protrusion 5e that abuts on the inclined portion 4e moves rearward together with the inclined portion 4e and the inclined portion 4e. Move to move forward relative to. As a result, even if the operation lever 4 is swung so that the amount of movement in the front-rear direction becomes L as in the trigger type liquid ejector 100 shown in FIG. 3, the amount of movement La of the protrusion 5e shown in FIG. The amount of movement in the front-rear direction of the spring-side projection 106 shown in FIG. 3 is smaller than the amount Lb. Therefore, in the trigger type liquid ejector 1 according to the present invention, the spring member 5 can be made harder to settle than the conventional trigger type liquid ejector 100. Further, since the amount of deformation of the spring member 5 is small, the force for swinging the operating lever 4 rearward is also small.

Further, as shown in the enlarged view of FIG. 2C, since there is a gap s between the outer wall 4b of the operating lever 4 and the inclined portion 4e, deterioration of the appearance due to sink marks can be prevented. .. Further, since the rib 4f protruding laterally inward from the outer wall 4b is provided at the portion where the gap s is located, the protrusion 5e does not fit into the gap s, and the operating lever 4 can be satisfactorily operated. Can be operated. Although one rib 4f may be provided, the fitting of the protrusion 5e into the gap s can be more reliably prevented by providing a plurality of ribs 4f at intervals as in the present embodiment. Further, even if the protrusion 5e may come into contact with the rib 4f due to dimensional variation or slight deformation, the contact between the protrusion 5e and the rib 4f is linear and the contact area is small, so that the protrusion 5e slides so much. It has no effect. Further, by adopting the rib 4f, there is an advantage that the amount of resin can be reduced as compared with the case where the gap s is completely filled.

The trigger-type liquid ejector according to the present invention has been described above while showing specific embodiments, but the trigger-type liquid ejector according to the present invention is not limited to the above-described embodiment, and is in the scope of claims. Also includes those with various changes made in. For example, although not shown, if a gap is formed between the inner side wall 4c and the inclined portion 4e when the inclined portion 4e is provided, the protrusion 5e may be fitted into the gap. In this case, the operating lever 4 is operated satisfactorily as in the above-described embodiment by providing at least one rib protruding laterally and outward from the inner side wall 4c at the position where the gap is generated. Can be done. Further, the structure of the internal passage and the pump provided in the ejector main body 2 through which the content liquid passes is not limited to the above-described embodiment, and other structures may be adopted.

1: Trigger type liquid ejector 2: Ejector body 3: Nozzle 4: Operation lever 4a: Front wall 4b: Outer wall 4c: Inner side wall 4d: Recessed portion 4e: Inclined portion 4f: Rib 4g: Shaft portion 4h: Connecting shaft portion 5: Spring member 5a: Inner curved piece 5b: Outer curved piece 5c: Lower curved portion 5d: Upper curved portion (fixed portion)
5e: Protrusion 6: Shroud 21: Mounting cap 22: Passage 22a: Vertical cylinder 22b: Horizontal cylinder 22c: Cylindrical 22d: Cylinder 23: Piston member 23a: Connecting recess 24: Cover 24a: Bearing A: Container C: Swing center s: Gap

Claims (2)

The operation is provided with an ejector main body mounted on the container, an operation lever that is held swingably in the front-rear direction with respect to the ejector main body, and a spring member that urges the operation lever forward. It is a trigger type liquid ejector that drives the pump provided in the ejector body by swinging the lever in the front-rear direction to suck, pressurize, and pump the content liquid contained in the container to eject it to the outside world. ,
The spring member has a fixing portion located in front of the swing center of the operating lever and fixedly held by the ejector main body, and a protrusion located below the fixing portion.
The operating lever is located on the lateral outer side of the protrusion and on the lateral inner side of the outer wall, and is provided with a gap from the outer wall, and faces upward from below. A trigger-type liquid ejector having an inclined portion inclined from the rear to the front and urged by the contact of the protrusion, and at least one rib protruding laterally inward from the outer wall. The operation is provided with an ejector main body mounted on the container, an operation lever that is held swingably in the front-rear direction with respect to the ejector main body, and a spring member that urges the operation lever forward. It is a trigger type liquid ejector that drives the pump provided in the ejector body by swinging the lever in the front-rear direction to suck, pressurize, and pump the content liquid contained in the container to eject it to the outside world. ,
The spring member has a fixing portion located in front of the swing center of the operating lever and fixedly held by the ejector main body, and a protrusion located below the fixing portion.
The operating lever is located on the inner side wall located on the lateral inner side of the protrusion and on the lateral outer side of the inner side wall, and is provided with a gap from the inner side wall, and faces upward from the lower side. A trigger-type liquid ejector having an inclined portion inclined from the rear to the front and urged by the contact of the protrusion, and at least one rib protruding laterally and outward from the inner side wall.

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