JP7273392B2 - trigger ejector - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act On December 18, 2018, ST Co., Ltd. released it at the “2019 spring wholesaler briefing session”. On December 19, 2018, ST Co., Ltd. released it at the “2019 Spring Business Meeting”.

TECHNICAL FIELD The present invention relates to a trigger-type ejector that ejects liquid in a container by operating a trigger, and particularly belongs to the technical field of a structure provided with a cover that covers a pump mechanism.

Conventionally, this type of trigger-type ejector has been used by being attached to a container containing, for example, a detergent or a deodorant. and a nozzle communicating with the discharge hole of the pump mechanism. When the user holds the container and operates the trigger, the pump mechanism sucks the liquid in the container and discharges it from the discharge hole, and the liquid discharged from the discharge hole is sprayed from the nozzle in the form of mist or foam. .

The trigger-type ejector disclosed in Patent Document 1 is provided with a cover formed so as to cover the pump mechanism. It can be covered up.

A cover is also attached to the trigger-type ejector disclosed in Patent Document 2. A through hole is formed in the side wall of the cover of Patent Document 2. As shown in FIG.

Japanese Patent Publication No. 2013-533098 Japanese Unexamined Patent Application Publication No. 2018-43778

By the way, since the cover of the trigger-type ejector disclosed in Patent Document 1 does not have a through hole or the like, the entire pump mechanism can be covered. turn into. Therefore, it is conceivable to form a through hole in the side wall, as in the cover of Patent Document 2, in order to differentiate the appearance and reduce the amount of resin material used.

However, forming a through-hole in the side wall of the cover reduces the strength of the cover, and there is a possibility that the cover may be easily deformed particularly by a vertical load. Since the pump mechanism is provided inside the cover, if the cover is deformed, an unreasonable force acts on the pump mechanism, which may cause a failure.

The present invention has been made in view of this point, and its purpose is to diversify the design of the cover that covers the pump mechanism, reduce the amount of resin material used, and reduce the load in the vertical direction. To minimize the deformation of a cover with respect to

In order to achieve the above object, in the present invention, at least two columnar portions extending in the vertical direction are provided, and the upper ends of these columnar portions are connected to each other to ensure strength.

A first invention is a trigger-type ejector that is attached to a container containing a liquid and ejects the liquid, comprising: a pump mechanism for sucking the liquid contained in the container; a trigger, a nozzle that communicates with a discharge hole of the pump mechanism and ejects the liquid discharged from the discharge hole to the outside, and a resin cover provided to cover the pump mechanism, The cover includes first and second columnar portions spaced apart from each other in the swinging direction of the trigger and extending in the vertical direction, and upper ends of the first columnar portion and the upper ends of the second columnar portion. When the side from which the liquid is ejected is defined as the front side, the first columnar portion is arranged in front of the second columnar portion, and the first columnar portion of the cover and the connecting portion are provided. A portion between the second columnar portion and the second columnar portion serves as a communicating portion that communicates the internal space of the cover with the outside of the cover. The vertical dimension of the communicating portion is set to be longer than the dimension, and the second columnar portion is arranged behind the pump mechanism, is formed thinner than the first columnar portion, and is attached to the cover. A rear portion of the communication portion formed on one side and a rear portion of the communication portion formed on the other side of the cover overlap each other in a side view.

According to this configuration, when the user swings the trigger, the pump mechanism is operated and the liquid stored in the container is sucked into the pump mechanism. The liquid sucked into the pump mechanism is ejected from the nozzle through the ejection hole.

In the cover that covers the pump mechanism, the first columnar portion and the second columnar portion are spaced apart from each other in the swinging direction of the trigger. is formed, and this space brings diversity to the design of the cover and contributes to the reduction of the usage amount of the resin material constituting the cover.

Further, since the first columnar portion and the second columnar portion of the cover are provided so as to extend in the vertical direction, when a load is applied to the cover from above, for example, the first columnar portion and the second columnar portion to support the load. At this time, since the upper ends of the first columnar portion and the second columnar portion are connected to each other by the connecting portion, it is difficult for the first columnar portion and the second columnar portion to be deformed so as to widen the interval between the first columnar portion and the second columnar portion. less quantity.

Also, since the second columnar portion is arranged behind the pump mechanism, it can be made thinner than the first columnar portion arranged in the portion where the pump mechanism is located. By thinning the second columnar portion, the rear side of the cover is thinned, and the design gives a smart impression.

In addition, since the communicating portions are formed on both sides of the cover, for example, when the cover is viewed from one side, the other side can be seen through the cover, further diversifying the design.

A second aspect of the invention is characterized in that the first columnar portion and the second columnar portion are formed so as to come closer to each other as they approach the upper end portion.

According to this configuration, the upper end portions of the first columnar portion and the upper end portions of the second columnar portion are close to each other, so the length of the connecting portion can be shortened.

A third aspect of the invention is characterized in that the dimension of the first columnar portion in the swinging direction of the trigger is set to be longer as it approaches the lower end portion.

With this configuration, the length of the lower end of the first columnar portion is increased, so that the strength of the root portion of the first columnar portion is sufficiently increased .

A fourth aspect of the invention is characterized in that a grooved portion is formed in the second columnar portion so as to extend in the vertical direction.

According to this configuration, the relatively thin second columnar portion is reinforced by the formation of the grooved portion, and deformation of the second columnar portion is suppressed.

A fifth aspect of the invention is characterized in that the grooved portion extends continuously to the connecting portion.

According to this configuration, the boundary portion between the second columnar portion and the connecting portion is reinforced by forming the grooved portion .

According to the first invention, the resin cover is provided with the first columnar portion and the second columnar portion extending in the vertical direction with a space therebetween, and the upper end portions of the first columnar portion and the second columnar portion are separated from each other. Since the connecting portion is provided, the design of the cover can be diversified, the amount of resin material used can be reduced, and deformation due to vertical load can be minimized.

Further, by making the second columnar portion arranged behind the pump mechanism thinner than the first columnar portion on the front side, the rear side of the cover can be designed to give a smart impression.

In addition, by forming the communicating portions on both sides of the cover, when the cover is viewed from one side, the other side can be seen through the cover, and the design can be further diversified.

According to the second invention, since the first columnar portion and the second columnar portion are formed so as to come closer to each other as they approach the upper end portion, the length of the connecting portion can be shortened. As a result, deformation of the cover against vertical loads can be further reduced.

According to the third aspect of the invention, the dimension of the first columnar portion is set so that the closer it is to the lower end portion, the longer it becomes. Deformation can be further reduced .

According to the fourth aspect of the invention, since the grooved portion is formed in the second columnar portion, deformation of the relatively thin second columnar portion can be suppressed, and as a result, deformation of the cover can be further reduced. can be done.

According to the fifth aspect of the invention, since the grooved portion is formed so as to continue from the second columnar portion to the connecting portion, the boundary portion between the second columnar portion and the connecting portion can be reinforced, and deformation of the cover can be prevented. can be much less .

1 is a front perspective view of a liquid ejection device having a trigger-type ejector according to an embodiment of the present invention; FIG. It is the perspective view which looked at the liquid ejection device from the rear side. It is a right side view of a liquid ejection device. 1 is a plan view of a liquid ejection device; FIG. It is a rear view of a liquid ejection device. FIG. 5 is a cross-sectional view corresponding to line AA in FIG. 4, showing a state in which the container is omitted; FIG. 3 is a view corresponding to FIG. 3 according to Modification 1 of the embodiment; FIG. 3 is a view corresponding to FIG. 3 according to Modification 2 of the embodiment; It is the FIG. 3 equivalent view which concerns on the modification 3 of embodiment. FIG. 3 is a view corresponding to FIG. 3 according to Modification 4 of the embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

FIG. 1 is a front perspective view of a liquid ejection device 100 having a trigger-type ejector 1 according to an embodiment of the present invention. The liquid ejecting device 100 includes at least a trigger type ejector 1 and a container 2 containing liquid. A trigger-type ejector 1 is attached to a container 2 and serves to eject the liquid contained in the container 2 to the outside. The container 2 is made of, for example, a resin member, and accommodates various deodorants, sterilizers, detergents, fungicides, fungicides, etc., or a liquid mixture thereof. However, the liquid contained in the container 2 is not particularly limited, and liquids other than the above liquids can also be contained.

(Overall Structure of Trigger Type Ejector 1)
As shown in FIG. 6, the trigger-type ejector 1 includes a pump mechanism 10 for sucking liquid contained in a container, a swingable trigger 20 for operating the pump mechanism 10, and a discharge hole 10a provided in the pump mechanism 10. and a resin cover 40 provided to cover the pump mechanism 10 . A tube 11 is connected to a suction hole 10 b of the pump mechanism 10 . The tube 11 is arranged inside the container 2 and extends vertically until it reaches the bottom of the container 2 .

In the description of this embodiment, the liquid ejecting side is the front side of the liquid ejecting device 100, and the opposite side is the rear side of the liquid ejecting device 100. When the liquid ejecting device 100 is viewed from the front side, it is the right side. The right side is defined as the right side, and the left side is defined as the left side. It can be used and stored in any position.

(Structure of Pump Mechanism 10 and Nozzle 30)
Since the pump mechanism 10 is conventionally known, a detailed description thereof will be omitted. For example, the pump mechanism 10 can be configured to include a body casing 12 , a piston 13 , a first check valve 14 and a second check valve 15 . Inside the body casing 12, a vertically extending suction hole 10b, a longitudinally extending discharge hole 10a, and an intermediate passage 10c connecting the suction hole 10b and the discharge hole 10a are formed. A downstream end of the discharge hole 10 a opens to the front end surface of the main casing 12 . A nozzle 30 is attached to the front end face of the main body casing 12 . A nozzle 30 communicates with the downstream end of the discharge hole 10a. Depending on the opening shape of the nozzle 30 or the like, the liquid can be sprayed in the form of a mist. Also, depending on the type of liquid, the liquid can be ejected in the form of bubbles.

The suction hole 10b opens at the lower end of the main body casing 12, and the upper end of the tube 11 is connected to this opening. The intermediate passage 10c extends vertically, the lower end of the intermediate passage 10c is connected to the upper end (downstream end) of the suction hole 10b, and the upper end of the intermediate passage 10c is connected to the rear end (upstream end) of the discharge hole 10a. part). A first check valve 14 is arranged between the upper end of the suction hole 10b and the lower end of the intermediate passage 10c. Allowed, but downward liquid and gas flow is prevented. A second check valve 15 is provided between the rear end of the discharge hole 10a and the upper end of the intermediate passage 10c. liquid and gas flow is permitted, but downward liquid and gas flow is blocked.

Inside the body casing 12, a cylinder 10d is formed. The cylinder 10d is arranged downwardly away from the discharge hole 10a, and its center line extends in the front-rear direction. A rear end portion of the cylinder 10d communicates with an intermediate portion of the intermediate passage 10c. A piston 13 is inserted into the cylinder 10d. A sealing material (not shown) is interposed between the outer peripheral surface of the piston 13 and the inner peripheral surface of the cylinder 10d, so that the two are liquid-tightly and air-tightly sealed. The piston 13 can reciprocate in the direction of the centerline of the cylinder 10d, that is, in the front-rear direction. Although not shown, the piston 13 is always urged forward by an urging means such as a spring. Further, although not shown, the amount of movement of the piston 13 is restricted by a stopper so that it does not slip out of the cylinder 10d.

The lower part of the main body casing 12 is fixed to the upper part of the container 2 with nuts 15 .

(Configuration of trigger 20)
The trigger 20 is composed of a member elongated substantially in the vertical direction. The upper end portion of the trigger 20 is rotatably supported via a support shaft 21 (shown by broken lines only in FIG. 6) extending in the left-right direction with respect to the front portion of the main body casing 12 . As a result, the trigger 20 swings rearward against the urging force of the urging means by applying an operating force rearward to the portion below the support shaft 21 of the trigger 20. , when the operating force is removed, it swings forward by the biasing force of the biasing means. That is, the trigger 20 is supported so as to be able to swing back and forth with respect to the main body casing 12 .

A connection shaft 20a to which the front end of the piston 13 is rotatably connected is provided at a portion below the support shaft 21 of the trigger 20 so as to extend in the left-right direction. When the trigger 20 swings rearward, the piston 13 moves rearward in conjunction with the swing of the trigger 20 . Further, the biasing force of the biasing means acts to move the piston 13 forward.

(Operation of pump mechanism 10)
When the user swings the trigger 20 rearward, for example, with a finger, the piston 13 moves rearward in the cylinder 10d, and if liquid is present in the cylinder 10d, the liquid will flow through the second check valve 15. and flows into the discharge hole 10a from the intermediate passage 10c. The liquid that has flowed into the ejection hole 10 a is ejected from the nozzle 30 . On the other hand, when the user releases the trigger 20, the piston 13 moves forward due to the biasing force of the biasing means, creating a negative pressure in the cylinder 10d. 11, the suction hole 10b, and the first check valve 14 to fill the cylinder 10d. By repeating this, the liquid can be ejected.

(Configuration of cover 40)
The cover 40 is, for example, an injection-molded hollow member, and inside the cover 40 is provided a pump mechanism arrangement space R (shown in FIG. 6) in which the pump mechanism 10 is arranged. As shown in FIG. 3, the cover 40 extends upward from the upper surface of the nut 15 to above the body casing 12 of the pump mechanism 10 . The trigger 20 is arranged to protrude downward from the front lower end of the cover 40 . The cover 40 also extends in the front-rear direction, and the front end of the cover 40 reaches the vicinity of the front end of the main body casing 12 . As shown in FIG. 1 and the like, the nozzle 30 protrudes forward from the front end portion of the cover 40 and is exposed from the cover 40 . The rear end of the cover 40 extends rearward beyond the rear end of the main body casing 12 . As shown in FIG. 3, the vertical dimension of the cover 40 is set shorter than the longitudinal dimension of the cover 40 .

The cover 40 has a wide portion 41 that is wide in the left-right direction and a narrow portion 42 that is narrower than the width of the wide portion 41. The wide portion 41 and the narrow portion 42 are formed integrally. The wide portion 41 is provided continuously from the lower portion of the cover 40 to the front portion thereof. The entire front portion of the cover 40 is composed of a wide portion 41 . On the other hand, the narrow portion 42 is not provided in the front portion of the cover 40, but is provided continuously from the intermediate portion in the front-rear direction of the cover 40 to the rear end portion thereof. Also, the narrowed portion 42 is not provided in the lower portion of the cover 40 .

The cover 40 is provided with a front columnar portion (first columnar portion) 43 and a rear columnar portion (second columnar portion) 44 extending in the vertical direction. The front columnar portion 43 and the rear columnar portion 44 are spaced apart from each other in the front-rear direction, which is the swinging direction of the trigger 20 . A lower end portion of the front columnar portion 43 is continuous with an intermediate portion in the front-rear direction of the wide portion 41 of the cover 40 . The front columnar portion 43 extends so as to be positioned rearward as it approaches the upper end. Therefore, the upper end of the front columnar portion 43 is positioned behind the lower end of the front columnar portion 43. The dimension in the front-rear direction of the front columnar portion 43 is set so as to increase as it approaches the lower end portion. Thereby, the strength of the root portion of the front columnar portion 43 can be increased. A continuous plate portion 45 extending forward is formed on the front side of the front columnar portion 43 . The front side of the continuous plate portion 45 is continuous with the front portion of the wide portion 41 . Since the front columnar portion 43 and the continuous plate portion 45 are smoothly continuous, the boundary portion between the front columnar portion 43 and the continuous plate portion 45 does not appear in the external appearance, but as indicated by the imaginary line L1 in FIG. , a boundary between the front columnar portion 43 and the continuous plate portion 45 can be set. Also, the boundary between the front columnar portion 43 and the continuous plate portion 45 can be formed so as to be distinguishable.

The rear columnar portion 44 extends forward as it approaches the upper end, and therefore the upper end of the rear columnar portion 44 is positioned forward of the lower end of the rear columnar portion 44 . It will be. That is, the front columnar portion 43 and the rear columnar portion 44 are formed so as to approach each other as they approach the upper end. The dimension of the rear columnar portion 44 in the front-rear direction can also be set so that the closer it gets to the lower end, the longer it becomes.

The rear columnar portion 44 is arranged behind the rear end portion of the main body casing 12 of the pump mechanism 10 . The rear columnar portion 44 is thinner than the front columnar portion 43 . Specifically, the lateral dimension of the rear columnar portion 44 is shorter than the lateral dimension of the front columnar portion 43 , and the longitudinal dimension of the rear columnar portion 44 is equal to the longitudinal dimension of the front columnar portion 43 . It is set shorter than the directional dimension. This is because the rear columnar portion 44 is arranged in a portion that does not house the pump mechanism 10 .

The narrow portion 42 of the cover 40 is provided with a connecting portion 46 that connects the upper end portion of the front side columnar portion 43 and the upper end portion of the rear side columnar portion 44 . As shown in FIG. 3 , the connecting portion 46 is a portion between the virtual line L2 and the virtual line L3 and extends from the upper end portion of the front side columnar portion 43 to the upper end portion of the rear side columnar portion 44 . In this embodiment, since the upper ends of the front columnar portion 43 and the rear columnar portion 44 are close to each other, the length of the connecting portion 46 can be shortened.

As shown in FIGS. 2, 4 and 5, etc., the outer surface of the rear columnar portion 44 is formed with a grooved portion 47 extending in the vertical direction. The grooved portion 47 of the rear columnar portion 44 continuously extends from the vicinity of the lower portion of the rear columnar portion 44 to the connecting portion 46 . Formation of the grooved portion 47 increases the strength of the rear columnar portion 44 and also increases the strength from the rear columnar portion 44 to the connecting portion 46 . Although not shown, the front columnar portion 43 may be formed with a similar grooved portion.

A portion of the cover 40 between the front columnar portion 43 and the rear columnar portion 44 serves as a communicating portion 48 that communicates the pump mechanism installation space R with the outside of the cover 4 . Communicating portions 48 are formed on both sides of the cover 40 . The communicating portion 48 can be configured by a through hole or an opening formed between the front side columnar portion 43 and the rear side columnar portion 44 in the cover 40 . The pump mechanism 10 can be seen from outside the cover 40 through the communicating portion 48 .

Also, the left communicating portion 48 and the right communicating portion 48 can be formed in the same shape. Furthermore, the communication portion 48 on the left side and the communication portion 48 on the right side can be formed at the same height. Thereby, for example, when the cover 40 is viewed from the left side, the other side of the cover 40 can be seen through the left communicating portion 48 and the right communicating portion 48 . The shape, size, position and number of the communicating portions 48 can be set arbitrarily.

(Action and effect of the embodiment)
As described above, according to the trigger-type ejector 1 of this embodiment, the cover 40 that covers the pump mechanism 10 has the front columnar portion 43 and the rear columnar portion 44 spaced apart from each other in the swinging direction of the trigger 20 . A space is formed between the front side columnar portion 43 and the rear side columnar portion 44 because of the spaced arrangement. A space is formed between the front side columnar portion 43 and the rear side columnar portion 44 of the cover 40, so that the usage amount of the resin material constituting the cover 40 can be reduced. In addition, since there is a space between the front side columnar portion 43 and the rear side columnar portion 44 of the cover 40, this space can be used as part of the design of the cover 40, and the design of the cover 40 can be diversified. be able to.

Further, since the front columnar portion 43 and the rear columnar portion 44 of the cover 40 are provided so as to extend in the vertical direction, when a load is applied to the cover 40 from above, for example, the front columnar portion 43 and the rear columnar portion 44 are displaced. The rear columnar portion 44 acts as if it were stretched and can receive the load. A case where a load is applied to the cover 40 from above is, for example, a case where the liquid ejecting device 100 is dropped during transportation or use. At this time, since the upper ends of the front columnar portion 43 and the rear columnar portion 44 are connected to each other by the connecting portion 47, the front columnar portion 43 and the rear columnar portion 44 are not easily deformed so as to widen the gap between them. The amount of deformation of the cover 40 is reduced. As a result, failure of the pump mechanism 10 can be suppressed.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent scope of claims are within the scope of the present invention.

In Modified Example 1 of the embodiment shown in FIG. 7, the front columnar portion 43 extends upward and forward from the lower portion of the cover 40 . The rear columnar portion 44 extends upward from the lower portion of the cover 40, so that the front-rear direction interval between the front columnar portion 43 and the rear columnar portion 44 increases as it goes upward. The connecting portion 46 has a shape elongated in the front-rear direction from the upper end portion of the front side columnar portion 43 to the upper end portion of the rear side columnar portion 44 .

In a modification 2 of the embodiment shown in FIG. 8, the front columnar portion 43 extends upward and forward from the lower portion of the cover 40 . The rear columnar portion 44 extends upward and forward from the lower portion of the cover 40 . The connecting portion 46 has a shape elongated in the front-rear direction from the upper end portion of the front side columnar portion 43 to the upper end portion of the rear side columnar portion 44 . The communicating portion 48 is formed large from the front side to the rear side of the cover 40 .

In a modification 3 of the embodiment shown in FIG. 9 , the front columnar portion 43 extends upward from the upper portion of the wide portion 41 . The rear columnar portion 44 also extends upward from the upper portion of the wide portion 41 . The connecting portion 46 has a shape elongated in the front-rear direction from the upper end portion of the front side columnar portion 43 to the upper end portion of the rear side columnar portion 44 .

In Modified Example 4 of the embodiment shown in FIG. 10 , the front columnar portion 43 extends upward and forward from the lower portion of the cover 40 . The rear columnar portion 44 extends upward and forward from the lower portion of the cover 40 . The connecting portion 46 has a shape elongated in the front-rear direction from the upper end portion of the front side columnar portion 43 to the upper end portion of the rear side columnar portion 44 . Further, the cover 40 is provided with an intermediate portion 49 that extends downward from the longitudinal intermediate portion of the connecting portion 46 to the vicinity of the lower portion of the cover 40 . By providing the intermediate portion 49, the strength of the cover 40 can be further improved.

INDUSTRIAL APPLICABILITY As described above, the trigger-type ejector according to the present invention can be used, for example, when spraying various deodorants, disinfectants, detergents, fungicides, fungicides, and the like.

1 trigger type ejector 2 container 10 pump mechanism 20 trigger 30 nozzle 40 cover 43 front side columnar portion (first columnar portion)
44 rear columnar portion (second columnar portion)
46 joint

Claims (5)

In a trigger-type ejector attached to a container containing a liquid and ejecting the liquid,
a pump mechanism for sucking the liquid contained in the container;
a swingable trigger that operates the pump mechanism;
a nozzle that communicates with a discharge hole of the pump mechanism and ejects the liquid discharged from the discharge hole to the outside;
A resin cover provided to cover the pump mechanism,
The cover includes a first columnar portion and a second columnar portion spaced apart from each other in the swinging direction of the trigger and extending in the vertical direction, and an upper end portion of the first columnar portion and the second columnar portion. A connection portion that connects the upper end portion is provided ,
When the side from which the liquid is ejected is defined as the front side, the first columnar portion is arranged in front of the second columnar portion,
A portion of the cover between the first columnar portion and the second columnar portion is a communicating portion that communicates the internal space of the cover with the outside of the cover,
The communicating portions are formed on both sides of the cover,
The vertical dimension of the communicating portion is set longer than the vertical dimension of the connecting portion,
The second columnar portion is arranged behind the pump mechanism and is thinner than the first columnar portion, and is arranged between the rear portion of the communicating portion formed on one side of the cover and the cover. A trigger-type ejector characterized in that a rear portion of the communicating portion formed on the other side overlaps with each other in a side view . The trigger ejector according to claim 1, wherein
A trigger-type ejector, wherein the first columnar portion and the second columnar portion are formed so as to come closer to each other as they approach an upper end portion. The trigger-type ejector according to claim 1 or 2,
A trigger-type ejector, wherein the dimension of the first columnar portion in the swinging direction of the trigger is set to be longer as it approaches the lower end portion. A trigger ejector according to claim 3 , wherein
The trigger-type ejector, wherein the second columnar portion is formed with a grooved portion extending in the vertical direction. A trigger ejector according to claim 4 ,
The trigger-type ejector, wherein the grooved portion extends continuously to the connecting portion.

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