JP3242584B2 - Liquid container lid structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid structure for a liquid container such as an air pot, and more particularly to a lid structure for a liquid container capable of smoothly moving a push button up and down.

[0002]

2. Description of the Related Art Conventionally, in a liquid container using an air pressure such as a heat retaining pot, almost the entire stroke of the push button is guided by a lid and a lock ring to smoothly move the push button up and down. (See Japanese Utility Model Publication No. 7-36619 and Japanese Utility Model Publication No. 7-5790).

[0003]

However, in the lid structure of the liquid container, a notch for locking the push button is formed in a guide wall for guiding the vertical movement of the push button. . For this reason, they are easily deformed and have problems in dimensional accuracy and strength. Further, since the push button is guided by a guide wall composed of separate parts such as a lid and a lock ring, high precision is required to obtain a smooth and stable operation, which is not preferable in production.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lid structure for a liquid container which can move a push button up and down smoothly and stably and which has excellent rigidity and precision.

[0005]

In order to achieve the above object, according to the present invention, a bellows is contracted by pressing a push button provided on a lid to supply air to an inner bottle in a liquid container. In the lid structure of the liquid container, a lock ring that guides the outer peripheral surface of the push button over the entire vertical movement is provided on the lid so as to be rotatable between a lock position and an unlock position. A lock portion is formed on the push button, and a lock receiving portion is formed on the lock ring to be engaged with the lock portion at the lock position to prevent the push button from being pushed.

The lock portion of the push button comprises at least one protrusion protruding from the outer peripheral surface, and the lock receiving portion of the lock ring is continuous with a relief recess bulged outward from the inner peripheral surface. It is preferable that the upper edge is constituted by a concave portion extending in the circumferential direction.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view of a pot provided with a lid structure according to the present invention. This pot is generally a container 1
And a lid 2 provided on the upper part of the container body 1.

The container body 1 includes a substantially cylindrical body 3, an inner bottle 4 formed of a vacuum double container housed therein, and a bottom mounted on a lower opening of the body 3 via a bottom ring 5a. It comprises a body 5 and a shoulder body 6 which is mounted on the upper opening of the body 3.

[0010] The shoulder body 6 is connected to a pumping pipe 7 and a water injection pipe 8 provided with a safety valve device 9.

As shown in FIG. 2, the lid 2 has an upper lid 15,
A lower cover 16, a lock ring 11, a push button 12, a bellows upper plate 13, a bellows 14, and the like are provided.

The lid 2 is formed by the container body 1 at the rear side of the upper lid 15.
Is mounted so as to be rotatable around a support shaft 1a.

An inner edge of the opening 15a of the upper lid 15 is formed with a retaining edge 17 extending downward. On the front side of the upper lid 15, an arc-shaped operation hole 18 is formed along the opening 15a.

An engagement piece 19 is provided upright on the upper surface of the lower lid 16, and a tubular portion 20 is provided inside the engagement piece 19.

The lock ring 11 has a cylindrical shape, and an operation portion 21 is provided at an upper opening edge. The operation unit 21 is located in the operation hole 18 of the upper cover 15, and by operating the operation unit 21, the lock ring 11 can be rotated between a lock position and an unlock position. Lock ring 11
A concave portion 22 having a predetermined length from the lower edge and a relief concave portion 23 extending from the upper edge to the lower edge are respectively formed at three equal portions on the inner peripheral surface of the. A lock notch 24 (see FIG. 4), which constitutes a lock receiving portion of the present invention, is formed at the upper opening edge portion of the lock ring 11 at three equal portions and continuously with the relief recess 23. A locking claw 25 that is locked in a groove 19a formed in the locking piece 19 of the lower cover 16 protrudes below the outer peripheral surface of the lock ring 11 (see FIG. 3). It is rotatably attached to the lower lid 16 within the restricted range of the groove 19a. As described above, the lock ring 11 has a simple shape with no notch in the outer peripheral portion, has high rigidity, and can secure stable accuracy. In addition, the rotation operation range of the lock ring 11 is determined by the rotation restriction of the locking claw 25 in the groove 19a.

The push button 12 has a groove 12a formed on the lower surface, and a protrusion 32 of a bellows upper plate 13 described later.
And are positioned in the rotational direction. And
Protrusions 26 are formed on the outer peripheral surface at three equal positions. When the push button 12 is attached to the upper lid 15, these projections 26 come into contact with the retaining edge 17 to push the push button 1.
2 is prevented from falling off the lid 2. Further, when the lock ring 11 is rotated by the operation section 21, the lock ring 11 is positioned at the lock notch 24 and prevents the push button 12 from being pushed. Note that a cylindrical receiving portion 27 is formed on the lower surface of the ceiling of the push button 12.

The bellows upper plate 13 has a cylindrical portion 28 protruding downward and an outer peripheral edge 29 bent downward. A through hole 30 is formed in the center, and a bellows cap 31 can be moved up and down. It is arranged. In addition, a projection 32 is extended outwardly from the outer peripheral edge 29 of the bellows upper plate 13 at three equal positions. These projections 32 are located in recesses 22 formed on the inner peripheral surface of the lock ring 11, and the upward movement position of the bellows upper plate 13 described later is regulated.

The bellows 14 has a bellows shape which is well known in the art.
The upper opening is fitted and locked on the outer surface of the cylindrical portion 28 of the bellows upper plate 13, and the lower opening is formed in the cylindrical portion 20 of the lower lid 16.
It is locked to the outer surface of.

A bellows spring 33 is provided between the tubular portion 20 of the lower lid 16 and a bellows cap 31 provided on the bellows upper plate 13. This allows
The bellows upper plate 13 moves upward through the bellows cap 31 by the urging force of the bellows spring 33, and its protrusion 32
Is positioned by contacting the upper edge of the recess 22 formed in the lock ring 11. In addition, the bellows cap 31 moves up to a position where the through hole 30 of the bellows upper plate 13 is opened.

In the pot having the above configuration, when the push button 12 is pushed in while the lock ring 11 is rotated by the operation section 21 to the unlock position shown in FIG.
This push button 12 has a lock ring 11
Moves down while being guided by the inner peripheral surface of the. And
The receiving part 27 of the push button 12 is a bellows spring 3
Push down the bellows cap 31 against the urging force of 3,
The through hole 30 is closed to prevent air from leaking to the outside, and the bellows 14 is contracted via the bellows upper plate 13. As a result, the air in the bellows 14 flows into the inner bottle 4 through an opening (not shown) formed in the lower lid 16, and the liquid pressure in the inner bottle 4 is pushed down by the air pressure, whereby the pumping pipe 7 and the safety valve device 9 And water is injected through an injection pipe 8. As described above, the push button 12 moves downward from the start of pushing to the lowest point by being guided only by the inner peripheral surface of the lock ring 11 together with the bellows upper plate 13, so that the pushing operation of the push button 12 is performed smoothly and stably. Can be done. After the pressing force is released, the push button 12 is moved upward by the urging force of the bellows spring 33. At this time, the push button 12 is guided only by the inner peripheral surface of the lock ring 11 and moves upward in a stable state.

When the lock ring 11 is rotated to the lock position shown in FIG. 4B with the push button 12 moved upward, the protrusion 26 of the push button 12 is inserted into the lock notch 24 of the lock ring 11. Is positioned. As a result, the push button 12 is prevented from being pushed, so that no water is injected.

As described above, according to the pot, not only the guide when the push button 12 moves up and down but also the pushing operation of the push button 12 can be prevented by the lock ring 11 alone. Further, the lock ring 11 itself has a substantially cylindrical shape and has no notch formed on the outer peripheral surface unlike the conventional example, so that high rigidity and stable accuracy can be obtained.

[0023]

As is apparent from the above description, according to the lid structure of the liquid container according to the present invention, the push button is guided over the entire stroke only by the lock ring, so that the vertical movement can be achieved. It can be performed smoothly and stably.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air pot according to the present embodiment.

FIG. 2 is an exploded cross-sectional view of typical parts of the lid of FIG.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a plan view showing a relationship between a lock ring and a push button in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid container 2 Lid 11 Lock ring 12 Push button 24 Notch part for lock (Lock receiving part) 26 Projection (Lock part) 32 Projection

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiromitsu Yoshiyuki 1-20-5 Tenma, Kita-ku, Osaka-shi, Osaka Zojirushi Mahobin Co., Ltd. 54-40561 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 41/00 303 A47J 27/21 101

Claims (2)

(57) [Claims] 1. A lid structure of a liquid container in which a bellows is contracted by pressing a push button provided on the lid to supply air to an inner bottle in the liquid container. A lock ring that guides the outer peripheral surface of the push button over the entire vertical movement is provided rotatably at a lock position and an unlock position, and a lock portion is formed on the push button, while the lock ring is formed on the lock ring. A lid structure for a liquid container, wherein a lock receiving portion that engages with the lock portion at the lock position to prevent the push button from being pushed is formed. 2. The lock portion of the push button comprises at least one protrusion protruding from an outer peripheral surface, and the lock receiving portion of the lock ring is a relief recess bulging outward from an inner peripheral surface. The lid structure for a liquid container according to claim 1, characterized in that the lid structure is constituted by a concave portion extending in the circumferential direction at the upper edge.