JPH062767Y2 - Rotation control mechanism for nozzle cap - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a rotation control mechanism of a nozzle cap for switching a liquid flow pattern of a pressurized liquid of a dispenser.

[Conventional technology]

In a dispenser, for example, a trigger type dispenser, a piston reciprocates in association with the swing of a trigger to suck up a liquid contained in a container into a cylinder, pressurize the liquid, and let the liquid flow out from an orifice. Due to the reciprocating motion of the piston, the pressurized liquid (pressurized liquid) is discharged as a liquid flow pattern of either a jet flow (jet) or a vortexed spray flow (spray). A liquid flow pattern switching mechanism is widely known in which a bottomed nozzle cap is screwed to the nozzle tip and the liquid flow pattern is switched according to the rotation angle of the nozzle cap.

In this liquid flow pattern switching mechanism, a spinner (vortex flow means) is used.
Is provided at the tip of the nozzle. For example, as disclosed in Japanese Utility Model Publication No. 50-35368, the spinner is configured to have a circular recess at the center of the tip and a pair of radial grooves extending in the tangential direction of the recess at the tip. Further, an axial through hole is formed in the spinner bottom portion and communicates with the flow path of the nozzle. An orifice is provided in the center of the bottom of the nozzle cap so as to face the recess of the spinner.

In such a configuration, the nozzle cap at the tip of the nozzle is rotated to adjust the distance between the bottom of the nozzle cap and the spenna. That is, if the nozzle cap is rotated and moved in the nozzle direction until the bottom of the nozzle cap comes into close contact with the tip of the spinner (screw in the direction of approaching the nozzle,
When moving in the opposite direction through the flow path of the nozzle and the through hole and flowing from the radial groove of the spinner into the recess,
The pressurized stream is vortexed and a spray stream is obtained.

Further, when the nozzle cap is rotated in the opposite direction and screwed back, the bottom of the nozzle cap is separated from the tip of the spinner, and the liquid flows out without being swirled and becomes a jet. The nozzle cap, nozzle, and spinner are usually injection molded from synthetic resin.

[Problems to be solved by the device]

As described above, in the known liquid flow pattern switching mechanism that switches the liquid flow pattern depending on the rotation angle of the nozzle cap,
The nozzle cap has an internal thread, and this internal thread is screwed onto the external thread of the nozzle. Therefore, if the nozzle cap is excessively rotated in the screw-retracting direction, the nozzle cap may be separated from the nozzle and may be lost.

Here, if the rotation restricting mechanism is provided, the nozzle cap can be prevented from being detached or lost. However, when the dispenser is assembled, the rotation restricting mechanism functions to prevent the nozzle cap from being attached to the nozzle. Then, easy attachment and prevention of detachment of the nozzle cap are contradictory issues, and a simple rotation restricting mechanism having a configuration that simultaneously solves these contradictory issues has not yet been known.

An object of the present invention is to provide a simple rotation control mechanism for a nozzle cap having a structure that simultaneously solves the contradictory problems of easy attachment and prevention of separation of the nozzle cap.

[Means for Solving the Problems]

In order to achieve this object, according to the present invention, an elastically deformable leaf spring-like outer flange is provided on the nozzle behind the male screw, and a stopper piece having a sloped surface and a vertical surface is projected from the outer flange. ing.

Then, the outer flange is elastically deformed by the abutting and pressing of the inclined surfaces to allow the stopper piece to escape from the rotational trajectory of the nozzle cap to allow the nozzle cap to rotate, while the abutting of the vertical surfaces causes the nozzle to rotate. It is supposed to prevent the rotation of the cap.

For that purpose, a stopper having a sloped surface and a vertical surface is provided on the inner surface of the nozzle.For example, this stopper cuts a part of the inner flange of the inner surface of the nozzle cap with the sloped surface and the vertical surface into which the nozzle It is formed as a notch for accommodating the stopper piece.

Here, the stopper piece of the nozzle, the inclined surface of the stopper of the nozzle cap, and the vertical surface are vertical surfaces when the nozzle caps are brought into contact with each other when the nozzle cap is rotated in the screwing direction and are rotated in the screwing back direction. It is provided so that they abut each other.

〔Example〕

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

As shown in FIG. 1, according to the rotation restricting mechanism 10 of the present invention, the flange 16 is integrally formed behind the male screw 12 on the nozzle 14, and the stopper piece 15 is formed on the male screw side surface (front face). ) Is formed on the flange. Assuming that the external thread 12 is a right-hand thread, the upper surface 15a of the stopper is an inclined surface with respect to the flange 16, and the lower surface 15b is a vertical surface. On the other hand, as shown in FIG. 2, the nozzle cap 18 screwed to the male screw 12 of the nozzle has a flange extending inward.
It is formed with 20 at the rear end.

The flange 16 of the nozzle is referred to as an outer flange, and the flange 20 of the nozzle cap 18 is referred to as an inner flange, as necessary.

Then, another stopper 22 that is paired with the stopper piece 15 of the nozzle is formed in a size in which a part of the flange 20 is cut out and the stopper piece 15 is housed, and the upper surface 22a of the cutout surface is a slope,
The lower surface 22b is a vertical surface.

In the nozzle 14 and the nozzle cap 18 having the above configuration, the third
As shown in the figure, the nozzle cap is screwed onto the male screw 12 of the nozzle. In FIG. 3, if the nozzle cap 18 is rotated clockwise to move (screw) the nozzle cap in the direction of the nozzle 14, the slope 15a of the stopper piece 15
The sloped surface 22a of the stopper 22 contacts, and the inner flange 20 presses the stopper piece 15.

Here, the outer flange 16 on which the stopper piece 15 is formed is
It is thinly formed so that it can be elastically deformed, and it functions as a leaf spring with high elasticity. Then, the inclined surface 22 of the stopper of the inner flange 20
When a contacts the inclined surface 15a of the stopper on the outer flange 16 and presses it, a component force in the axial direction is generated, and by this component force,
The outer flange 16 elastically deforms and escapes from the locus of the slope 22a. Therefore, the inclined surface 22a of the inner flange 22 crosses over the inclined surface 15a and the vertical surface 15b of the outer flange 16, and the nozzle cap 18 is allowed to rotate in the clockwise direction. Then, the nozzle cap 18 is screwed until it comes into close contact with the tip of the spinner 38, as shown in FIG.

When the sloped surface 22a of the inner flange 22 exceeds the sloped surface 15a and the vertical surface 15b, the outer flange 16 immediately returns to its original shape by elasticity. Therefore, the slope 22a has a slope 15a and a vertical surface 15b.
Once over, then the nozzle cap 18 in the opposite direction, that is,
When rotated in the counterclockwise direction, the vertical surfaces 15b and 22b contact each other. In such contact between the vertical surfaces 15b and 22b,
Since no axial component force is generated, the flange 16 does not elastically deform. Therefore, the vertical surface 15b of the stopper on the outer flange 16 prevents the nozzle cap 18 from moving in the counterclockwise direction.
The rotation of the nozzle cap is prevented, and the screwing back of the nozzle cap is restricted.

As described above, in the configuration in which the flange 16 provided in the nozzle 14 is used as a leaf spring, the nozzle cap 18 is attached to the nozzle while elastically deforming the flange 16, and the nozzle cap can be easily attached without any trouble. . Also,
Once installed, the stopper piece 15 and the stopper 22 limit the screw cap 18 from screwing back and forth.
It is possible to reliably prevent the nozzle cap from coming off from 14. Therefore, according to this invention, the contradictory problems of easy attachment and prevention of detachment of the nozzle cap 18 can be solved at the same time.

With the configuration in which the flange 16 is provided on the nozzle 14, the nozzle and the flange can be integrally molded without any problem. Further, the stopper piece 15 and the stopper 22 can be easily formed, and the rotation restricting mechanism 10 having a simple structure can be obtained.

Further, in the configuration in which the inclined surfaces are brought into contact with each other and the vertical surfaces are brought into contact with each other, a large axial component force that causes elastic deformation of the flange 16 can be easily obtained, and the screwing back of the nozzle cap 18 can be reliably prevented.

In the embodiment, the stopper piece 15 is composed of a protrusion and the stopper 22 is composed of a notch. However, only when the nozzle cap 18 rotates in the screwing direction, it is sufficient to elastically deform the flange 16 and release it.
22 is not limited to this combination. For example, the stopper 22 may be a protrusion having the same shape as the stopper piece 15.

For example, the nozzle 14 and the nozzle cap 18 are incorporated in a trigger type dispenser 26 as shown in FIG. The trigger type dispenser 26 includes a dispenser body 28, and the dispenser body is a nozzle cap.
The container 30 is detachably attached to the mouth 32 of the container. When the trigger 34 swings, a piston (not shown) interlocked with the trigger reciprocates to suck up and pressurize the liquid in the container 36 into a cylinder (not shown). The pressurized liquid (pressurized liquid) reaches the spinner 38 via the flow path 37 of the nozzle 14 attached to the dispenser body 28, is vortexed by the spinner, and flows out from the orifice 40 of the nozzle cap.

The basic structure of the dispenser 26 is well known and will not be described in detail because it is not the purpose of the present invention, but the dispenser has a known configuration disclosed in USP No. 3,840,157, for example. In addition, the spinner 38 also has a recess at the center of the tip,
It has a known shape with a pair of radial grooves extending in the tangential direction of the recess at the tip.

In addition, it is preferable to appropriately provide a pattern display capable of recognizing the liquid flow pattern at a glance according to the rotation angle of the nozzle cap 18. For the pattern display, for example, <mark on the upper surface of the dispenser body 28 and Spra on the nozzle cap 18
Made by imprinting the y, Jet display. With this configuration, the nozzle cap 18
By rotating, the spray flow pattern can be obtained, and by rotating the nozzle cap until Jet is aligned with the <mark, a jet flow pattern can be obtained.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. Needless to say.

For example, in the embodiment, the flanges 16 and 20 are formed in the entire circumferential shape, but may be partial flanges.

[Effect of device]

As described above, according to the present invention, the nozzle cap is attached to the nozzle while elastically deforming the flange, and the nozzle cap can be easily attached without any trouble.
Further, once mounted, the vertical caps are brought into contact with each other to restrict screwing back of the nozzle cap, so that the nozzle cap is reliably prevented from being detached from the nozzle.

Further, the flanged nozzle can be integrally formed without any problem, and the stopper piece of the nozzle and the stopper of the nozzle cap can be easily formed, and a rotation restricting mechanism having a simple structure can be obtained.

Therefore, according to the present invention, it is possible to obtain a rotation restricting mechanism that simultaneously solves easy attachment and prevention of detachment of the nozzle cap, despite the simple structure.

The outer surface of the flange, the stopper pieces formed on the inner surface of the nozzle cap, which can contact each other, and the stopper are inclined surfaces,
It is possible to use protrusions, notches, or protrusions each having an inclined surface and a vertical surface where the vertical surfaces contact each other. According to the projections and the notches having such a shape, a large component force in the axial direction that causes elastic deformation of the flange of the nozzle can be easily obtained by the contact between the inclined surfaces. Further, the abutment of the vertical surfaces reliably prevents the nozzle cap from screwing back.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a nozzle having a flange formed, FIG. 2 is a partially cutaway perspective view of a nozzle cap, and FIG. 3 is a trigger type dispenser in which a nozzle and a nozzle cap are incorporated. It is a partially broken front view. 10: Nozzle cap rotation restriction mechanism, 12: Male screw of nozzle, 14: Nozzle, 15: Stopper piece of nozzle, 16: (Outer) flange of nozzle, 18: Nozzle cap, 20: (Inward of nozzle cap ) Flange, 22: stopper of nozzle cap, 26: trigger type dispenser, 28: dispenser body, 30: nozzle cap, 32: mouth of container, 34: trigger, 36: container, 37: flow path of nozzle, 38:
Spinner, 40: Orifice.

Claims (3)

[Scope of utility model registration request] 1. A rotation restricting mechanism, which is screwed to a male screw at the tip of a nozzle of a dispenser and restricts rotation of a nozzle cap for switching a spray flow pattern in accordance with a rotation angle, in which an elastically deformable leaf spring shape is provided. Outer flange of the nozzle is provided on the nozzle behind the male thread, and a stopper piece with a beveled surface on one side in the circumferential direction and a vertical surface on the other side is provided protruding from the outer flange of the nozzle on the side of the male thread side. When the nozzle cap is rotated in the direction of screwing with respect to the nozzle, the inclined surface of the nozzle stopper piece is brought into contact with and pressed to elastically deform the outer flange to allow rotation of the nozzle cap. , When the nozzle cap is rotated in the direction of screwing back, the stopper that has a vertical surface that abuts the vertical surface of the stopper piece of the nozzle and prevents the nozzle cap from rotating is attached to the male thread of the nozzle tip. Behind the internal thread to be deposited, the turn restricting mechanism of the nozzle cap, characterized in that provided on the inner surface of the nozzle cap. 2. A stopper provided on the nozzle cap,
Part of the inner flange on the inner surface of the nozzle cap
2. The rotation restricting mechanism for a nozzle cap according to claim 1, wherein the rotation restricting mechanism is a notch for cutting the stopper piece of the nozzle in a vertical plane. 3. A stopper provided on the nozzle cap,
The rotation restricting mechanism for a nozzle cap according to claim 1, wherein the rotation restricting mechanism is a projection piece having an inclined surface and a vertical surface and provided on the inner surface of the nozzle cap.