JPH036278Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a bellows pump, in particular a bellows pump that uses air pressure to extract liquid from a container.
This invention relates to a bellows pump mainly used in so-called air pots.

Prior Art In conventional bellows pumps of this type, the operating part of the push plate that compresses the bellows installed inside the lid body was generally circular in shape.
In recent years, with the diversification of consumer needs, the shape of the main body of the device has become more prismatic, and as a result, there has been a demand for prismatic operation parts of the lid and the push plate.

Therefore, as shown in Japanese Utility Model Application Publication No. 59-141943, for example, a rectangular inner cylinder is provided hanging from the upper surface of the lid, and a rectangular cylindrical push plate having a top surface is installed inside the inner cylinder. It was arranged so that it could be moved up and down with an equal gap from the inner cylinder, and the push plate compressed the bellows installed below it.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, the shapes of the inner cylinder of the lid body and the pusher plate are simply changed from circular to rectangular. As a result, the push plate may get caught and become heavy when operated, and the push plate may not return completely when it returns.
There was a risk that the hot water inside the container could be discharged outside the container without the user's knowledge.

In particular, if the corner portion of the push plate is pressed, this phenomenon will be reliably reproduced, posing a major safety problem.

The present invention solves these problems and provides a bellows pump with extremely high operability and safety, which slides reliably no matter where the operating part of the square push plate is pressed. The purpose is to

Means for Solving the Problems In order to solve the above problems, the present invention is equipped with a bellows inside the lid body that supplies air and injects liquid into the water container built into the main body of the device, and the lid body includes A substantially rectangular inner cylinder into which a push plate having a substantially rectangular operating portion for compressing the bellows is inserted vertically is vertically disposed, and the operating portion of the push plate is provided on each side of the inner cylinder near the inner corner radius. In addition, the relationship between each radius r of the operation part of the push plate and the internal angle radius R of the inner cylinder is set such that R≦r.
That is.

Function With this configuration, no matter which position of the approximately rectangular push plate operation part is pressed, the end surface of the push plate operation part will not touch anything other than the sliding rib provided on the inner cylinder of the lid body, so it will be secure. As a result, extremely high operability and safety can be obtained.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 to 3, reference numeral 1 denotes a prismatic air pot body, and a cylindrical water container 2 with a bottom is housed inside the air pot body 1. As shown in FIGS. 3 is a spout fixed to the upper part of the air pot body 1; 4 is a prismatic lid provided on the upper part of the spout 3; It has a substantially rectangular inner cylinder 4a with radius R, and an inner flange 4b protruding inward is formed at the lower end of the inner cylinder 4a. In addition, sliding ribs 4 are provided at each part near the contact point between the inner side of the inner cylinder 4a and the inner corner radius R.
c is provided.

Reference numeral 5 denotes a push plate that is housed in the inner cylinder 4a and is movable up and down.
a, a cylindrical peripheral wall 5b vertically provided on the lower surface of the operating portion 5a, a protruding rib 5c formed to protrude in the vertical direction on the upper part of the outer peripheral surface of the peripheral wall 5b, and the peripheral wall 5a.
It has a plurality of protruding pieces 5d protruding from the lower part of the outer peripheral surface of b.

Reference numeral 6 denotes a lock lever for regulating the lifting and lowering of the push plate 5, and the lock lever 6 has a notch 6a that escapes the plurality of locking pieces 5d when assembled, and a groove 6b that escapes the protruding rib 5c when the push plate 5 moves up and down. is formed. Reference numeral 6c denotes an operating knob, and this operating knob 6c protrudes from a through hole 4d formed on the top surface of the lid body 4, and can be manually operated.

7 is a bellows that is compressed by the downward movement of the push plate 5, and the upper end of this bellows 7 is connected to the bellows upper plate 8.
The lower ends are each sealed with a lid cover 9 by ultrasonic welding or the like.

Reference numeral 10 denotes an intake valve provided at the upper end of the bellows upper plate 8, and this intake valve 10 is normally kept in an open state by a restoring spring 11. Reference numeral 12 denotes a restoring spring for the bellows 7, which is built into the bellows 7. 13
is a seal packing that seals the inner container 2 and the lid cover 9. Reference numeral 4e denotes a support claw provided on the lid 4 and holding the lock lever 6. After inserting the push plate 5 from above the lid 4, the support claw 4e is inserted from the lower surface of the lid 4 into a predetermined position on the peripheral wall 5b of the push plate 5. The lock lever 6 is fitted into the support claw 4e, and then the lock lever 6 is press-fitted into the support claw 4e to be held rotatably.

In the above configuration, by rotating the lock knob 6c, when the groove 6b of the lock lever 6 and the protruding rib 5c are aligned, the push plate 5 can be moved downward, and when the operating part of the push plate 5 is pressed downward, When the intake valve 10 is pressed to close the opening of the bellows upper plate 8 and the push plate 5 is further pressed downward, the bellows 7 is compressed and pressurized air is sent into the water container 2 below. Discharge the liquid in 2. On the other hand, when the pressure on the push plate 5 is released, the push plate 5 returns to its original position.

At this time, a sliding rib 4c is provided near the contact point between the inner side of the substantially rectangular inner cylinder 4a of the lid body 4 and the inner angle R, and the angle R of the operating portion 5a of the push plate 5 and the inner cylinder Internal angle R of 4a: Since the relationship with R is R≦r, even if you press the corner of the operating part 5a of the push plate 5, it will not come into contact with anything other than the sliding rib 4c, and therefore the push plate 5 will be securely pressed. can be raised and lowered.

Effects of the invention As is clear from the above embodiments, the bellows pump of the invention does not come into contact with the inner cylinder of the lid body and the operating part of the pusher plate on any surface other than the rib surface of the sliding part in any state of use. Boards get caught,
There is no increase in operating force when pressing due to strain, no accidental discharge of liquid in the water container due to failure to return, and no burns or contamination of the floor due to this discharge, resulting in improved operability. and can significantly improve safety.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of essential parts of an air pot using a bellows pump according to an embodiment of the present invention.
FIG. 2 is a perspective view of the main part, and FIG. 3 is a sectional view of the main part. 1...Device main body, 2...Water container, 4...Lid body,
4a...Inner cylinder, 4c...Sliding rib, 5...Press plate, 5a...Operation section, 7...Bellows.

Claims (1)

[Scope of utility model registration request] The lid is equipped with a bellows that injects liquid by supplying air to a water container built into the device body, and the lid has a
A substantially rectangular inner cylinder into which a push plate having a substantially rectangular operating portion for compressing the bellows is inserted vertically is vertically disposed, and the operating portion of the push plate is provided on each side of the inner cylinder near the inner corner radius. A bellows pump characterized in that a vertical sliding rib for slidingly guiding is provided, and the relationship between each radius r of the operating part of the push plate and the internal angle radius R of the inner cylinder is R≦r. .