JPS597448B2 - Spout opening/closing device in thermos flask - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a thermos flask in which an inner bottle housed in an outer cylinder is opened and closed by vertical movement by rotating a stopper lid.
This invention relates to a spout opening/closing device for a thermos flask, which opens and closes an on-off valve provided at the spout in conjunction with the rotational operation of a stopper lid.

Conventionally, in thermos flasks in which the open end of the inner bottle is sealed with an inner stopper, the spout provided in the drainer fitting to which the inner stopper is removably fitted is usually open, so dust and other particles There is a risk that foreign matter may adhere to the inner wall of the spout and be discharged together with hot water during pouring, and insects, cockroaches, etc. may enter through the spout, resulting in extremely unsanitary conditions.

In order to eliminate this, thermos flasks have an outer lid that covers the inner stopper and is attached so that it can be opened and closed, or a valve body is installed in the spout that automatically opens and closes when the thermos flask is tilted during pouring. has been devised, but not only was it difficult to completely seal it, but it also had the disadvantage that if the thermos flask accidentally fell over, the outer lid or valve body would open and hot water would leak out.

In order to eliminate such drawbacks, the present invention has an arrangement in which an on-off valve provided at the open end of the pouring spout is linked to the rotation of the stopper lid screwed onto the open end of the inner bottle, so that the stopper lid is closed during pouring. Provided is a spout opening/closing device for a thermos flask, characterized in that the on-off valve is opened at the same time as the opening end of the inner bottle is opened by rotating, and the on-off valve is also closed at the same time as the stopper lid is closed after use. It is something to do.

When an embodiment of the present invention is explained with reference to the drawings, 1 is an outer cylinder 1.
A thermos bottle body with an inner bottle 2 mounted inside a, a drainer fitting 3 disposed at its upper end, and a lower surface outer periphery of a hole 4 bored in the drainer fitting 3 as is known in the art, through a packing 5. Inner bottle 2
The draining fitting 3 is attached to the main body 1 by crimping the upper end mouth edge and screwing the retaining ring 7 onto the threaded cylinder 6 protruding from the lower surface, and by bringing the retaining ring 7 into contact with the lower surface of the upper end flange of the outer cylinder 1a. It is something that is firmly attached to.

Reference numeral 8 denotes a pouring spout formed by recessing an outwardly projecting portion of the draining fitting 3, and a top wall 8b is integrally provided between the upper ends of both side walls 8a, 8a.

9 is a single inclined protrusion protruding from the inner peripheral surface of the draining fitting 3;
They are provided at the same pitch as the screws 11 provided on the outer peripheral surface of the lower half of the stopper lid 10, extending from one side wall inlet of the spout 8 to the other side wall inlet.

The cap lid 10 is screwed onto this inclined protrusion 9, and the packing 12 attached to the outer peripheral surface of the lower end is crimped to the rim of the above-mentioned port 4 to close the open end of the inner bottle 2, and the outer peripheral surface of the upper end thereof is closed. Forming a cam circumferential surface 13 eccentric to the threading center line,
When the bottle spout is closed, the highest circumferential surface thereof slides into contact with or approaches the rear end surface of the top wall 8b of the spout 8.

Reference numeral 14 denotes a guide frame fixed to the lower surface of the ceiling wall 8b, the first half of which is formed into a narrow spring interior portion 14a, and the second half formed into wide guide pieces 14b, 14b on both sides, and between the guide pieces 14b, 14b. A long hole 15 is bored in the top wall 8b so as to communicate with the top wall 8b.

Reference numeral 16 denotes a locking groove carved in the width direction at the front end of the upper surface of the top wall 8b.

A sliding rod 17 is provided on the upper surface of the ceiling wall 8b so as to be slidable back and forth, and a short column-shaped sliding piece 17a is integrally provided at the center of the lower surface of the sliding rod, and the sliding piece 17a is inserted through the elongated hole 15. Guide piece 14
The sliding piece 17a is slidably fitted between the opposing surfaces of the guide frame 14, and the rear part of the connecting plate 18 that abuts the end surface of the guide frame 14 is connected to the sliding piece 17a by a screw 19.

Reference numeral 20 denotes a spring which is compressed in the spring inner part 14a of the guide frame 14, and constantly presses the front surface in front of the sliding piece 17a rearward, so that the rear end surface of the sliding rod 17 is fixed to the above-mentioned stopper lid 10.
It is in contact with the cam circumferential surface of.

Reference numeral 21 denotes an on-off valve provided at the opening end of the spout 8, the upper end of which is curved rearward to align with the upper surface of the front end of the ceiling wall 8b, and the curved rear end is formed to be slightly narrower, and its both end surfaces Rotary shafts 22, 22 are integrally provided in a protruding manner.

The rotation shafts 22, 22 are rotatably supported in bearing holes 23, 23 formed at the front end of the sliding rod 17.

Reference numeral 24 denotes a tongue protruding diagonally downward from the rear end of the curved portion of the on-off valve 21, and is engaged with the locking groove 16 described above.

To describe how to use the embodiment configured as above, when filling hot water into the inner bottle 2, turn the stopper lid 10 counterclockwise to remove the screw 11 from the inclined protrusion 9. In the removed state, despite the pressing force of the spring 20, the rear surface of the sliding piece 17a comes into contact with the rear end of the elongated hole 15 or the front end of the spring inner part of the guide frame 14, and the sliding rod 17 does not move back any further, and therefore the stopper lid 10 can be easily fitted after filling with hot water.

When the packing 12 attached to the lower end of the lid 10 closes the opening 4, the sliding rod 17 is in contact with the highest part of the cam peripheral surface 13 of the lid 10 due to the force of the spring 20. The sliding rod 17 is located on the front side of the top wall 8b, so that the front surface of the tongue piece 24 of the on-off valve 21 presses against the front edge of the opening of the locking groove 16, and the on-off valve 21 is positioned on the rotation shafts 22, 22. The opening end of the spout 8 is closed by receiving a rotational force in the counterclockwise direction in the figure around .

Next, by rotating the stopper lid 10 to open the port 4 and communicating the inner bottle 2 with the spout 8 and directing the lower part of the cam peripheral surface 13 toward the spout 8 side, the sliding rod 17 is moved back while slidingly contacting the cam circumferential surface 13 by the force of the spring 20, and the on-off valve 21
The tip of the tongue piece 24 is moved forward while being locked on the inner surface of the locking groove 16 to rotate the rotation shaft 22 clockwise, and the opening/closing valve 21 is opened.

The device shown in FIGS. 3 and 4 is a modification of the above-mentioned embodiment, in which a sliding piece 27a is connected to the lower surface of the rear end of a sliding rod 27 having approximately the same shape as the sliding rod 17 described above. together with the sliding piece 27
A connecting plate 28 is integrally provided at the lower end of the spout 8.
A long hole 25 of an appropriate length is cut forward from the center of the rear end of the top wall 8b, and the sliding plate 27 is inserted into the long hole 25 so as to be slidable back and forth. A connecting plate 28 is placed along the lower surface of the ceiling wall 8b on the upper surface of the ceiling wall 8b, and a locking claw 29 that is protruded upward from the front end of the connecting plate 28 is carved in the center of the lower surface of the ceiling wall 8b. When the sliding plate 27 is moved back and forth within the groove 30 and is in contact with the lowest surface of the cam circumferential surface 13 of the stopper lid 10, the locking pawl 29 is moved into the groove 3.
It is configured to be locked to the rear end surface 30a of 0.

Further, a spring support piece 31 is provided protruding from the lower surface of one side of the top wall 8b of the spout 8, and a spring 32 is stretched between the support piece 31 and the spring connection piece 28a protruding from the lower surface of the rear end of the connection plate 28. The sliding plate 27 is always pulled rearward, and its rear end surface is pressed against the cam circumferential surface 13 of the stopper lid 10.

The other configurations are the same as those of the above-mentioned embodiment,
Therefore, when the stopper lid 10 is rotated, the sliding plate 27
It moves forward or backward while slidingly contacting the cam peripheral surface 13 of
When moving forward, the on-off valve 21 is rotated counterclockwise around the rotation shaft 22 via the tongue piece 24 that engages with the locking groove 16 to close the spout 8, and the valve 21 is moved backward. In this case, the on-off valve 21 is opened.

Next, the device shown in FIGS. 5 and 6 shows still another embodiment of the present invention, in which the rear end portion is bent upward to form a sliding surface 37a that comes into contact with the cam peripheral surface 13 of the stopper lid 10. Sliding rod 37
A long hole 35 is provided in the center of the holder, and this sliding rod 37 is connected to the spout 8.
It is supported by a support plate 40 so as to be slidable back and forth while being in sliding contact with or in close proximity to the lower surface of the top wall 8b.

This support plate 40 is connected to the top wall 8b by screws on both sides of its rear end.
A pair of support arms 40a and 40b are integrally provided to protrude forward from the fixed portion.
The upper end of the on-off valve 21 is rotatably supported by a pin 41 between the tips of these support arms 40a, 40a, and one end of a spring 42 wound around the center of the pin 41 is connected to the open-off valve 21. The other end of the support arm 40a is attached to the rear surface.
, 40a, and the spout 8 is normally closed by an on-off valve 21.

Further, a spring receiver 43 protruding from the upper surface of the horizontal beam 40b is loosely fitted into the front end of the elongated hole of the sliding rod 37, and the spring 43 is injected between the spring receiver 43 and the rear end surface of the elongated hole 35. The sliding surface 37a of the sliding rod 37 is always pressed against the cam circumferential surface 13 of the stopper lid 10, and the top end surface of the sliding rod 37 receives the rear surface of the upper end of the on-off valve 21.

Therefore, when the lid 10 is rotated, the sliding rod 37 moves back and forth while sliding against the cam circumferential surface, and when it moves forward, the on-off valve 21 opens, and when it moves backward, it opens and closes. The valve 21 is closed.

Note that the opening/closing means for the opening/closing valve by the back and forth movement of the sliding rod may be configured such that a rack is formed on the sliding rod and the rack is engaged with a pinion provided on the rotating shaft of the opening/closing valve.

As described above, in the present invention, a drainer fitting having a spout on one side is fixed to the upper end of a thermos flask body in which an inner bottle is housed in an outer cylinder, and the opening end of the inner bottle is opened and closed on the drainer fitting. In a thermos flask having a stopper lid screwed together, an on-off valve whose upper end is rotatably supported is disposed at the open end of the spout of the drainer, and a sliding rod is disposed at the top of the spout. , one end of the sliding rod is connected to the on-off valve, and the other end is brought into contact with a cam circumferential surface provided on the outer wall surface of the stopper lid by the elastic force of a spring disposed at an appropriate position of the spout; This relates to a spout opening/closing device for a thermos flask, characterized in that the opening/closing valve is opened and closed via a sliding rod by rotating the stopper lid, so that the opening end of the thermos bottle body can be opened and closed by the stopper lid. When the thermos is sealed, the on-off valve can also be closed, so dust and pests are completely prevented from entering the spout, keeping it clean and sanitary at all times. Even if the thermos bottle is accidentally knocked down, hot water can be prevented from leaking from inside, and when in use, by rotating the stopper lid, the open end of the thermos body and the opening/closing valve can be opened at the same time. It is easy and extremely convenient to operate, as the opening end can be sealed with the stopper lid at the same time as the on-off valve is closed.Furthermore, the on-off valve can be opened without rotating the stopper cover. Because it is not possible to
It is especially safe and can be used with confidence in homes with infants and children.

Further, according to the present invention, there is no need to make major changes to the structure of the thermos flask in which the inner bottle is opened and closed by the stopper lid, and the stopper can be opened and closed by arranging a sliding rod using the space above the spout of the thermos flask. Since the rotation of the lid can be transmitted to the opening/closing valve of the spout, the structure is extremely simple, and since the sliding rod is always in contact with the cam circumferential surface of the outer wall of the stopper lid using a spring force, the sliding rod can be easily moved. Sliding can be done smoothly and reliably, and even if a large turning force is applied to the lid, no destructive force is applied to the sliding rod, so it can be used for a long period of time. Since the moving rod only touches the cam peripheral surface of the stopper lid, the stopper lid can be easily removed from the drainer when pouring water into the inner bottle.

[Brief explanation of the drawing]

The drawings show three types of Q embodiments of the present invention. Fig. 1 is a longitudinal cross-sectional view of Example 1, Fig. 2 is an exploded perspective view of its main parts, and Fig. 3 is a longitudinal cross-sectional view of Example 3. FIG. 4 is an exploded perspective view of the main parts, FIG. 5 is a longitudinal sectional view of Example 3, and FIG. 6 is an exploded perspective view of the main parts. 1 is a thermos main body, 8 is a spout, 9 is an inclined protrusion, 10 is a stopper lid, 11 is a screw, 13 is a cam circumferential surface, 17, 27, 37 are sliding rods, and 21 is an on-off valve.

Claims (1)

[Claims] 1. A drainer fitting having a spout on one side is fixed to the upper end of a thermos flask body consisting of an inner bottle stored in an outer cylinder, and a stopper lid for opening and closing the opening end of the inner bottle is screwed onto the drainer fitting. In the thermos flask, an on-off valve whose upper end is rotatably supported is disposed at the opening end of the spout of the drainer fitting, and a sliding rod is disposed at the top of the spout, and one end of the sliding rod is disposed. is connected to the opening/closing valve, and the other end is brought into contact with a cam circumferential surface provided on the outer wall surface of the stopper lid by the elastic force of a spring disposed at an appropriate position of the spout, and by rotational operation of the stopper lid. A spout opening/closing device for a thermos flask, characterized in that the opening/closing valve is opened and closed via a sliding rod.