JP6588384B2 - Trigger type bubble jet - Google Patents

Description

  The present invention relates to a foam ejector that drives a pump to eject a mixture of contents and air in the form of bubbles, and more particularly to a trigger-type foam ejector that drives a pump using an operation lever. .

  For example, in a container filled with shampoo, body soap, hand soap, facial cleanser, etc., the contents in the container are mixed with air to make a foam from the viewpoint of simplifying use by omitting the foaming operation of the contents. Many are equipped with a foam ejector that can be ejected.

  Such a bubble ejector includes a pump composed of a single cylinder in which a piston for contents and a piston for air are concentrically arranged in series, and each piston is operated by pushing a pressing head, And air are sucked and pressurized in each cylinder, mixed together in the confluence space on the pump outlet side, and passed through a foaming member such as a mesh to make the contents foamy and ejected to the outside It is.

  By the way, when a container equipped with this type of bubble ejector is used in a bathroom or the like, water may also be taken together when taking outside air into the cylinder. If water is taken into the cylinder in this way, the amount of air that is pressurized by the cylinder will decrease and the mixing ratio with the contents will fluctuate, and only air will be supplied. Since the water that has been taken in is also fed, there is an inconvenience that fine bubbles as expected cannot be ejected.

  On the other hand, in the foam ejector using such a pressure head, as disclosed in, for example, Patent Document 1, the portion that has become the water inlet (the uppermost end of the hollow neck and the lowermost end of the cover) Intrusion of water can be suppressed by providing a sealing member between the two.

Japanese Patent No. 4781749

  By the way, various products are demanded in the market, and in such a foam ejector, a trigger type foam that drives the pump by checking the operation lever instead of the pressing head that drives the pump by pushing down by hand. An ejector is sought after. And even if it is in a trigger type bubble ejector, it is calculated | required to prevent the invasion of water supposing the case where it uses in water fields, such as a bathroom.

  Even if this invention is used in the bathroom etc., even if it is a case, it makes it a subject to suppress the penetration | invasion of the water to an inside effectively, and this makes fine foam blow out regardless of a use place. The aim is to propose a trigger type foam ejector that can be used.

The present invention has a top wall that covers the mouth of the container and a base cap that has an opening that penetrates the top wall and is held by the mouth
It has a stem inserted through the opening, and is held by the base cap on the back surface of the top wall and sucks, pressurizes, and pumps the contents and air of the container individually by pushing down and restoring the stem. Two pumps,
An internal passage that feeds the pumped contents and air in a mixed state, and is mounted on the stem and ejects foam-like contents from the outlet of the internal passage;
An operation lever that is supported so as to be swingable with respect to a support portion provided at the rear of the base cap, and that pushes down the stem with a check toward the rear;
The support portion includes a pair of side walls located in the left-right direction, a rear wall that interconnects the side walls in the rear, a lid wall that covers the inner space surrounded by the side walls and the rear wall, the inner space, and the outside world And vents that communicate with
The base cap is a trigger type bubble ejector having an air introduction port that passes through the top wall and communicates with the internal space and supplies air to the pump.

  The vent is preferably a rear wall through-hole penetrating the rear wall.

  The top wall preferably has an upward partition that extends upward between the air inlet and the rear wall through hole.

  The vent is preferably a lid wall through-hole penetrating the lid wall.

  It is preferable that the lid wall has a cylindrical wall that rises so as to surround the lid wall through-hole, and the cylindrical wall has a communication opening that communicates with the lid wall through-hole.

  The operating lever has an upper wall that covers an upper side of the cylindrical wall, and the cylindrical wall is elastically deformed by the approach of the upper wall to the lid wall accompanying the check of the operating lever, and the cylindrical wall is It is preferable to have an elastic part that tilts.

  The operation lever preferably includes a downward partition that extends downward between the lid wall through hole and the nozzle.

  It is preferable that the lid wall is integrally connected to the side wall or the rear wall via a hinge.

  In the trigger type foam ejector of the present invention, the support portion includes a cover wall that covers the internal space surrounded by the side wall and the rear wall, and a vent that allows the internal space and the outside to communicate with each other. It has an air inlet that communicates with the internal space and sends air to the pump. That is, since the air introduction port communicates with the internal space and is not directly exposed to the outside, direct entry of water into the air introduction port can be prevented. Thereby, even when using it in a bathroom etc., the fine foam can be ejected.

  The vent is preferably a rear wall through hole penetrating the rear wall or a lid wall through hole penetrating the lid wall. When the rear wall through hole is provided, the ceiling wall is provided with an upward partition that extends upward between the air inlet and the rear wall through hole, thereby effectively preventing water from entering. Can do.

  In addition, when providing a cover wall through-hole, by providing a cylinder wall that rises around the cover wall through-hole in the cover wall and providing a communication opening in the cylinder wall that leads to the cover wall through-hole, it is possible to effectively infiltrate water. Can be blocked. In this case, the operation lever is provided with an upper wall that covers the upper part of the cylinder wall, and the cylinder wall is elastically deformed by the approach to the lid wall of the upper wall accompanying the check of the operation lever and tilts the cylinder wall. Is preferably provided. That is, although the operation wall can be prevented more effectively by providing the upper wall on the operation lever, the upper wall is pressed against the cylinder wall as it is and the operation lever is prevented from being checked. Here, by providing an elastic portion on the cylindrical wall, the cylindrical wall can be tilted even if the upper wall is pressed against the cylindrical wall, so that an excellent water intrusion prevention effect is obtained without obstructing the movement of the operation lever. be able to. In addition, when the operation lever is provided with a downward partition wall extending downward between the lid wall through hole and the nozzle, it is possible to more effectively prevent water from entering.

  And it is preferable that a cover wall is integrally connected with a side wall or a back wall via a hinge, and in this case, since a number of parts can be suppressed, cost can be suppressed.

It is sectional drawing which shows 1st embodiment of the trigger type foam ejector according to this invention. FIG. 2 is a plan view of the base cap shown in FIG. 1 (a lid wall is omitted). FIG. 2 is a cross-sectional view showing a state in which an operation lever is restored in the trigger type foam ejector shown in FIG. 1. It is sectional drawing which shows 2nd embodiment of the trigger type bubble ejector according to this invention. (A) is a top view of the base cap shown in FIG. 4, (b) is sectional drawing in the state which opened the cover body of the base cap. FIG. 5 is a cross-sectional view showing a state in which the operation lever is restored in the trigger type foam ejector shown in FIG. 4.

  Hereinafter, with reference to drawings, one embodiment of the trigger type bubble ejector according to the present invention is described. In the present specification, claims, and abstract, the “up” direction and the “down” direction refer to directions when a container equipped with a trigger-type foam ejector is placed on a horizontal plane. . The “front” direction is the direction in which the tip of the nozzle is directed (the direction in which the tip opening is located with respect to the nozzle base) (left side in FIG. 1), and the “rear” direction is the opposite side (see FIG. 1 right side). The “left” and “right” directions are directions when the trigger type bubble ejector is viewed toward the front end opening of the nozzle (from front to rear).

  FIG. 1 shows a state in which a first embodiment (indicated by reference numeral A) of a trigger type foam ejector according to the present invention is attached to a container C. Here, reference numeral 1 denotes a base cap for holding the trigger type foam ejector A at the mouth of the container C. The base cap 1 includes a top wall 1 a that covers the mouth of the container C. The top wall 1a of the present embodiment has a shape curved downward from the center toward the outside in the radial direction. An outer wall 1b extending downward is provided at the edge of the top wall 1a. An internal thread is formed inside the outer wall 1b, and the trigger type bubble ejector A is detachably held at the mouth of the container C by being screwed into the external thread provided at the mouth of the container C. In addition, in order to hold | maintain the base cap 1 in the container C, it is also possible to use other structures, such as an undercut. In addition, an opening 1c penetrating the top wall 1a is provided at the center of the top wall 1a, and a hollow neck portion 1d that rises upward is provided at an edge of the opening 1c.

  Further, a hole (air introduction port) 1e penetrating the top wall 1a is provided behind the top wall 1a. An upward partition 1f extending upward from the top wall 1a is provided outside the air inlet 1e.

  A support portion S for supporting an operation lever described later is provided behind the top wall 1a. The support portion S of the present embodiment is integrally connected to the top wall 1a and has a pair of left and right side walls 1g, a rear wall 1h connecting the side walls 1g behind the side wall 1g, and a hollow neck in front of the side wall 1g. A front wall 1j that connects to the portion 1d and connects the side walls 1g to each other is provided. Here, an air inlet 1e is opened in a space (internal space N) surrounded by the side wall 1g, the rear wall 1h, the hollow neck 1d, and the front wall 1j. A vent (rear wall through hole) 1k communicating with the internal space N is provided below the rear wall 1h (below the upper end of the upward partition 1f). Further, as shown in FIG. 2, the side wall 1g is provided with a columnar shaft portion 1m protruding outward in the left-right direction.

  Further, a lid wall 1n that covers the internal space N is provided above the side wall 1g, the rear wall 1h, and the front wall 1j. The lid wall 1n of the present embodiment has an inclined portion that slightly inclines downward from the front to the rear and a vertical portion that stands up at the front, and the rear end of the inclined portion via the hinge h is the rear wall 1h. And are connected together. The side wall 1g is provided with an engaging protrusion 1p that protrudes inward in the left-right direction, and is linked to the lid wall 1n that is bent by the hinge h to maintain the lid wall 1n in a closed posture. Note that the base cap 1 of the present embodiment is an integrated product in which the rear wall 1h and the lid wall 1n are connected by molding with the lid wall 1n open like the base cap shown in FIG. 5B. It is formed as

  Reference numerals 2 and 3 are two pumps that are suspended and held at the mouth of the container C by the base cap 1 and suck and pressurize and pump the contents and air individually. The pump 2 for contents and the pump 3 for air form the small diameter cylinder 4a and the large diameter cylinder 4b which has the bottom part integrally connected to the upper part of the small diameter cylinder 4a, and has the form arrange | positioned coaxially in series, It is formed by a single cylinder 4. A flange extending outward in the radial direction is provided above the cylinder 4, and when suspended by the container C, a packing PA is provided on the lower surface side of the flange, and between the mouth of the container C The packing PA is sandwiched between them.

  The content pump 2 has a suction port 4c through which the content in the container C flows in at the bottom of the small-diameter cylindrical body 4a, and the suction port 4c has a suction extending toward the bottom of the container C. Pipe p is held. A hollow piston 5 is provided in the small diameter cylinder 4a so as to be in contact with the inner peripheral surface of the small diameter cylinder 4a and to be slidable along the axis. A poppet 6 is disposed inside the hollow piston 5, and a hollow stem 7 is disposed outside the hollow piston 5. A spring 8 is provided between the cylinder 4 and the hollow piston 5 to elastically support the hollow piston 5 and the stem 7 so as to be slidable. Further, an inward flange 7a is provided above the inner surface of the stem 7, and a ball valve 9 is provided above the inward flange 7a.

  According to the contents pump 2 having such a configuration, when the stem 7 is pushed down, the contents in the small-diameter cylindrical body 4a are pressurized by the hollow piston 5 and pumped through the stem 7. On the other hand, when the stem 7 moves upward by the restoring force of the spring 8, the contents in the container C are sucked into the small-diameter cylindrical body 4a through the suction pipe p.

  The air pump 3 includes an air piston 10 that is in contact with the inner peripheral surface of the large-diameter cylindrical body 4b and is slidable along the axis. Here, the air piston 10 includes a cylindrical guide 10 a that surrounds the stem 7 on the radially inner side. A gap through which air pressurized by the air piston 10 passes is provided between the outer peripheral surface of the stem 7 and the inner peripheral surface of the cylindrical guide 10a. In addition, a communication port 10b for taking in air from the outside into the large-diameter cylindrical body 4b is provided at the edge of the cylindrical guide 10a (the outer surface of the air piston 10). Further, a check valve 11 that opens and closes the communication port 10b is provided outside the cylindrical guide 10a. The check valve 11 normally contacts the back surface of the air piston 10 and closes the communication port 10b. On the other hand, when the inside of the large-diameter cylindrical body 4b becomes negative pressure, it separates from the back surface of the air piston 10 and opens the communication port 10b. release.

  Further, as shown in FIG. 1, a holder 12 is provided above the stem 7, and the holder 12 is provided with foam members 13 (two in this embodiment) having a mesh-like mesh. . The holder 12 is held by a nozzle 14 connected to the stem 7. The nozzle 14 includes a vertical cylindrical portion 14a that extends through the hollow neck 1d and extends upward, and a horizontal cylindrical portion 14b that extends from the rear toward the front. An internal passage 14c is provided inside the cylindrical portion 14a and the horizontal cylindrical portion 14b. A distal end opening 14d serving as an outlet of the internal passage 14c is provided at the distal end of the horizontal cylindrical portion 14b. Furthermore, a pair of convex portions 14e projecting outward in the left-right direction is provided at the connecting portion between the vertical cylindrical portion 14a and the horizontal cylindrical portion 14b. In addition, the clearance gap between the vertical cylindrical part 14a and the hollow neck part 1d is narrowed in the range which does not prevent the movement of the nozzle 14. FIG.

  Here, a gap is formed between the outer peripheral surface of the stem 7 and the inner peripheral surface of the nozzle 14 through which the pressurized air passing through the gap between the stem 7 and the cylindrical guide 10a described above passes. Thus, the air passing through the gap is configured to flow through the gap formed in the inner peripheral surface of the stem 7 and the outer peripheral surface of the holder 12 and into a space (merging space G) in which the ball valve 9 is disposed. ing. Here, since the contents pumped by the contents pump 2 also flow into the merge space G, the contents and air are mixed in the merge space G. Then, the mixed contents and air pass through the foaming member 13, whereby the contents can be foamed. In addition, since an optimal foaming state changes with contents, the roughness of the mesh provided in the foaming member 13, the number of the foaming members 13, or the mixing ratio of the content and air introduced into the merge space depends on the contents. The optimum one is selected as appropriate.

  An operation lever 15 supported by the support portion S is provided above the nozzle 14. The operation lever 15 includes a pair of left and right side walls 15a, an upper wall 15b that connects the side walls 15a above the side wall 15a, and a side wall 15a that is connected to the front of the side wall 15a. The front wall 15c is provided. Further, the side wall 15a is provided with a recess 15d that fits the shaft portion 1m and supports the operation lever 15 with respect to the support portion S so as to be swingable. Further, on the upper wall 15b, a C-shaped concave portion (a pair provided in the left-right direction) that is downwardly released is suspended directly above the convex portion 14e, although illustration is omitted. As a result, when the operation lever 15 is turned backward, a recess (not shown) pushes down the convex portion 14 e, so that the stem 7 can be pushed down through the nozzle 14. Further, on the back surface of the upper wall 15b, a downward partition 15e is provided in front of the lid wall 1n and extending downward from the upper end of the vertical portion of the lid wall 1n.

  In the trigger type bubble ejector A configured as described above, the stem 7 is pushed down via the nozzle 14 when a finger is put on the front wall 15c of the operation lever 15 and the finger is turned backward. The hollow piston 5 is also pushed downward against the reaction force of the spring 8. As a result, the contents in the small diameter cylindrical body 4a are pressurized and fed to the merge space G. At this time, since the air piston 10 is also pushed downward, the air in the large-diameter cylindrical body 4b is pressurized, and the gap between the outer peripheral surface of the stem 7 and the inner peripheral surface of the cylindrical guide 10a, the outer peripheral surface of the stem 7 And the inner peripheral surface of the nozzle 14, and the gap between the inner peripheral surface of the stem 7 and the outer peripheral surface of the holder 12, and the pressure is fed to the merge space G. The pumped contents and air are mixed with each other in the merging space, and are further foamed by passing through the foaming member 13 and are ejected from the tip opening 14 d through the internal passage 14 c of the nozzle 14.

  On the other hand, when the pressure on the operating lever 15 is released, the operating lever 15 moves forward by the restoring force of the spring 8 as shown in FIG. Thereby, since the inside of the small diameter cylinder 4a becomes a negative pressure, the contents in the container C are sucked through the suction pipe p. At this time, the air piston 10 also rises and the inside of the large-diameter cylindrical body 4b becomes negative pressure, so that the check valve 11 is separated from the back surface of the air piston 10 and the communication port 10b is opened. Here, since the communication port 10b is connected to the rear wall through hole 1k through the air introduction port 1e and the internal space N, the outside air is connected to the rear wall through hole 1k, the internal space N, the air introduction port 1e, and the communication. It is introduced into the large diameter cylindrical body 4b through the mouth 10b.

  As described above, the air inlet 1e communicates with the internal space N and is not directly exposed to the outside world, so that water does not directly enter the air inlet 1e even when used in a water field such as a bathroom. Further, an upward partition 1f extending upward from the rear wall through hole 1k is provided in the vicinity of the rear wall through hole 1k that allows the internal space N to communicate with the outside and the like. Even if water may enter, it is possible to effectively prevent entry into the air inlet 1e. Since the trigger type foam ejector A has a structure in which water does not easily enter, even when used in a bathroom or the like, fine foam can be ejected.

  Next, 2nd embodiment (it shows with the code | symbol B) of the trigger type foam ejector according to this invention is described, referring FIGS. In addition, about the site | part which has a function common with previous embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.

  As shown in FIGS. 4 and 5 (a), the trigger-type foam ejector B includes a vent hole (cover wall through hole) 1q that penetrates the cover wall 1n and a cylindrical tube that rises around the cover wall through hole 1q. A wall 1r is provided. As shown in FIG. 4, the cylindrical wall 1r is in contact with the upper wall 15b before the operation lever 15 is checked, and the upper opening thereof is closed by the upper wall 15b. The cylindrical wall 1r is provided with a communication opening 1s communicating with the lid wall through hole 1q. As shown in FIG. 5B, the communication opening 1s of the present embodiment is a slit that extends from the tip of the cylindrical wall 1r toward the root, but may be a through hole that penetrates the cylindrical wall 1r. In addition, an elastic portion 1t that is made thin and elastically deformable is provided at the base of the cylindrical wall 1r (see FIG. 5B). In the trigger type bubble ejector A described above, two engagement protrusions 1p linked to the lid wall 1n are provided per side wall 1g. However, in the trigger type bubble ejector B, one is provided. Yes. Further, the lower end of the downward partition 15e is located below the communication opening 1s.

  In the trigger type bubble ejector B having such a configuration, the contents can be ejected in the same manner as in the previous embodiment by checking the operation lever 15 backward. The upper wall 15b approaches the lid wall 1n by checking the operation lever 15, but the cylindrical wall 1r is elastically deformed by the elastic portion 1t as shown in FIG. 6 and tilts forward. Therefore, the movement of the operation lever 15 is not hindered.

  On the other hand, when the pressure on the operation lever 15 is released, the hollow piston 5 is lifted by the restoring force of the spring 8 and the inside of the small diameter cylindrical body 4a becomes negative pressure, so that the contents in the container C are sucked through the suction pipe p. The At this time, the air piston 10 is also lifted, the inside of the large-diameter cylindrical body 4b becomes negative pressure, the check valve 11 is separated from the back surface of the air piston 10, and the communication port 10b is opened. Here, since the communication port 10b is connected to the rear wall through hole 1k through the air introduction port 1e and the internal space N as in the previous embodiment, the air in the outside world is connected to the rear wall through hole 1k and the internal space N. Then, the air is introduced into the large-diameter cylindrical body 4b through the air introduction port 1e and the communication port 10b. Furthermore, the internal space N of the present embodiment is an opening K1 located in front of the operation lever 15 (opening formed between the upper wall 15b and the front wall 15c) via the lid wall through hole 1q and the communication opening 1s. Alternatively, since it communicates with the opening K2 (opening formed between the upper wall 15b and the rear wall 1h) located behind the operation lever 15, air can be introduced also from the openings K1 and K2. In addition, since the downward partition 15e is provided between the opening K1 and the communication opening 1s, even if water may enter from the opening K1, entry of water into the communication opening 1s is effectively prevented. Is done.

  The trigger type foam ejector according to the present invention is not limited to this embodiment, and various modifications can be made within the scope according to the claims. For example, the hollow neck portion and the support portion described above are integrally connected to the base cap, but may be formed of a member different from the base cap (all the hollow neck portion and the support portion are the base caps). Different members may be used, and for example, only the front wall may be used as a different member). Further, the upward partition and the downward partition may be omitted. The contents pump and the air pump are not limited to the above-described configuration, and various types can be adopted. Further, the operation lever is not limited to the one that pushes the stem indirectly through the nozzle as described above, and may be one that pushes the stem directly. Moreover, when connecting a lid wall integrally via a hinge like embodiment mentioned above, you may connect not only with the above-mentioned back wall but with a side wall. The lid wall may be a different member separated from the base cap. Furthermore, at least one of the rear wall through hole 1k and the two openings K1 and K2 provided in the second embodiment is sufficient.

1: Base cap 1a: Top wall 1b: Outer wall 1c: Opening 1d: Hollow neck 1e: Air inlet 1f: Upward partition wall 1g: Side wall 1h: Rear wall 1j: Front wall 1k: Rear wall through hole (vent hole)
1m: Shaft 1n: Lid wall 1p: Engagement protrusion 1q: Lid wall through hole (vent)
1r: cylinder wall 1s: communication opening 1t: elastic part 2: pump for contents 3: pump for air 4: cylinder 4a: small diameter cylinder 4b: large diameter cylinder 4c: suction port 5: hollow piston 6: poppet 7: Stem 7a: Inward flange 8: Spring 9: Ball valve 10: Air piston 10a: Cylindrical guide 10b: Communication port 11: Check valve 12: Holder 13: Foam member 14: Nozzle 14a: Vertical cylindrical portion 14b: Horizontal cylindrical part 14c: Internal passage 14d: Tip opening 14e: Convex part 15: Operation lever 15a: Side wall 15b: Upper wall 15c: Front wall 15d: Concave part 15e: Downward partition wall A, B: Trigger type foam jet C : Container G: Junction space K1: Opening K2: Opening N: Internal space PA: Packing S: Support part h: Hinge p: Suction pipe

Claims (8)

A base cap that covers the mouth of the container and an opening that penetrates the top wall, and is held by the mouth;
It has a stem inserted through the opening, and is held by the base cap on the back surface of the top wall and sucks, pressurizes, and pumps the contents and air of the container individually by pushing down and restoring the stem. Two pumps,
An internal passage that feeds the pumped contents and air in a mixed state, and is mounted on the stem and ejects foam-like contents from the outlet of the internal passage;
An operation lever that is supported so as to be swingable with respect to a support portion provided at the rear of the base cap, and that pushes down the stem with a check toward the rear;
The support portion includes a pair of side walls located in the left-right direction, a rear wall that interconnects the side walls in the rear, a lid wall that covers the inner space surrounded by the side walls and the rear wall, the inner space, and the outside world And vents that communicate with
The base cap is a trigger type bubble ejector having an air introduction port that passes through the top wall and communicates with the internal space and supplies air to the pump.   The trigger type foam ejector according to claim 1 in which said vent is a back wall penetration hole which penetrates said back wall.   The trigger type bubble ejector according to claim 2, wherein the top wall has an upward partition that extends upward between the air inlet and the rear wall through hole.   The trigger type foam ejector according to claim 1, wherein the vent is a lid wall through-hole penetrating the lid wall.   The trigger type foam ejector according to claim 4 with which said lid wall has a cylinder wall which stands up and surrounds said lid wall through-hole, and this cylinder wall has a communicating opening which leads to said lid wall through-hole.   The operating lever has an upper wall that covers an upper side of the cylindrical wall, and the cylindrical wall is elastically deformed by the approach of the upper wall to the lid wall accompanying the check of the operating lever, and the cylindrical wall is The trigger type bubble ejector according to claim 5, further comprising an elastic part for tilting.   The trigger type foam ejector according to any one of claims 4 to 6, wherein the operation lever includes a downward partition that extends downward between the lid wall through-hole and the nozzle.   The trigger type foam ejector according to any one of claims 1 to 7, wherein the lid wall is integrally connected to the side wall or the rear wall via a hinge.

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