JPH075789Y2 - Liquid container pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pump device for liquid containers such as magic bottles and electric pots.

(Prior Art) Conventionally, this type of pump device pushes a bellows in an expanded state, sends air in the bellows into a container body and pressurizes the hot water or cold water in the container through a pumping pipe. It is designed to be discharged.

(Problems to be solved by the invention) However, in the conventional pump device, when a large amount of liquid is to be discharged, the push operation must be repeated many times,
Not only is it labor-intensive, the discharge of the liquid becomes intermittent with each pushing operation, and the liquid is additionally discharged on the discharged liquid surface, which causes the liquid to scatter, which is especially dangerous in the case of hot water. There was a problem.

Therefore, it is possible to increase the capacity of the bellows,
The bellows must be pushed with a strong force until the required capacity is discharged, and the amount of contraction is large, resulting in poor operability.

Also, when the amount of liquid is small, there are many air layers in the container,
There was a problem that the bellows had to be pushed deeply with a strong force and the operability was poor.

The present invention has been made in view of such problems, and an object thereof is to provide a pump device for a liquid container capable of discharging a large amount of liquid by a simple operation.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a bellows having an intake port and a ventilation port communicating with a container, spring means for urging the bellows in a contracting direction, and the bellows. Operating means for extending the spring against the biasing force of the spring means, locking means for locking the first operating means at an arbitrary position, and second operation for releasing the locking means after closing the inlet of the bellows. And means.

(Operation) According to the above configuration, when the first operating means is operated, the bellows extends to the maximum while sucking air from the intake port against the biasing force of the spring means, and is locked by the locking means at that position. .

Next, when the second operation means is operated, the inlet of the bellows is closed and the locking means is released, the bellows is contracted by the urging force of the spring means, and the air inside passes through the ventilation hole into the container. Sent in. As a result, the air layer in the container is pressurized and the liquid is discharged through the pumping pipe.

When the operation of the second operating means is stopped after the predetermined amount of liquid is discharged, the first operating means is locked by the locking means at that position to prevent the bellows from contracting, so that the pressurization in the container is stopped. The liquid discharge is completed.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a lid body 1 of an air pot equipped with a pump device according to the present invention, which generally includes a lid body 2, a lower lid plate 3, a bellows 4, and an operating shaft 5 which is a first operating means. It comprises a bellows spring 6 which is a spring means, a locking member 7 which is a locking means (see FIGS. 2 and 5), and an operating lever 8 which is a second operating means.

The lid main body 2 is attached to the container main body 11 so that the hinge can be opened and closed so as to cover the container main body 11.

The lower lid plate 3 is attached so as to cover the bottom of the lid main body 2, and a cylindrical guide shaft 13 having an upper end lid is provided at the center so as to project, and the upper end penetrates the lid main body 2 to the outside. It is designed to project. The inside of the guide shaft 13 is reinforced by a cross-shaped reinforcing plate 14, and ventilation holes 15 are provided at four locations on the outer periphery.
Has been drilled. In addition, the lower end of the guide shaft 13 has a ventilation port.
A blind plate 17 having 16 is attached by screws 18 and seal packing 19 is attached. The seal packing 19 abuts on the edge of the mouth 11a of the container body 11.

The bellows 4 is covered at its upper end by the upper cover 20 and at its lower end by the lower cover 21, and is housed in the space between the lid main body 2 and the lid lower plate 3, and the upper cover 20 is attached to the lid main body 2 with screws 22. Has been. A hole through which the guide shaft 13 of the lower cover plate 3 penetrates is formed in the lower cover 21, and a seal packing 23 that is in pressure contact with the outer peripheral surface of the guide shaft 13 is formed at the edge of the hole.
Is installed. Similarly, the upper cover 20 is provided with a hole through which the guide shaft 13 and an operation shaft 5 to be described later pass, and a seal packing 24 that is in pressure contact with the outer peripheral surface of the operation shaft 5 is attached to the edge of the hole.

An intake port 25 is formed in the upper cover 20 to form an intake path A from outside the bellows 4 to the inside of the bellows 4 through the intake port 25. The intake port 25 is formed by an intake valve 9 described later. It can be opened and closed.

As shown in FIG. 3, the intake valve 9 includes a valve rod 26 penetrating the lid main body 2, a valve body 27 attached to the lower end of the valve rod 26 and facing the intake port 25, and the valve body 27. The valve spring 28 is interposed between the inlet port 25 and the edge of the inlet port 25 and biases the valve body 27 upward.

Further, a spring receiving portion 29 is formed on the upper end of the valve rod 26, guide portions 30, 30 are provided on both sides of the spring receiving portion 29, and a fourth portion is formed on the outer surface of the guide portion 30, 30. As shown in the figure, guide grooves 31, 31 are formed. Then, the guide portions 30, 30 are fitted into the guide holes 43, 43 of the spring retainer plate 45 attached to the operation lever 8 described later,
Also, the guide protrusions 44,44 protruding from the edges of the guide holes 43,43
Is slidably engaged with the guide grooves 31, 31, and the guide protrusions 44, 44 are locked at the ends of the guide grooves 31, 31, so that the guide portions 30, 30 come out of the guide holes 43, 43. It is designed to prevent

The intake valve 9 is provided with a lever spring 46, which is mounted by compressing a spring between a spring receiving portion 29 of the valve rod 26 and a spring holding portion 42 of the operating lever 8 which will be described later.
It can be pushed down by. At this time, the spring constant of the lever spring 46 is set to be larger than the spring constant of the valve spring 28, and when the operating lever 8 is pushed down, the valve spring 28 bends first and the valve body 27 closes the intake port 25. It is like this.

The operating shaft 5 has a cylindrical shape with an upper end covered, the lower end is attached to the inner surface of the lower cover 21 of the bellows 4 and the outer periphery of the seal packing 23, and the upper end is the bellows 4.
The seal packing 24 is pierced through the upper cover 20 so as to come into pressure contact therewith, and further penetrates the lid body 2 to project outward. The guide shaft 13 of the lower lid plate 3 is loosely fitted inside the operation shaft 5. Then, in a state where the bellows 4 extends downward to the maximum extent (FIG. 1),
Ventilation hole provided from the lower end of the operation shaft 5 to the outer peripheral surface of the guide shaft 13.
The inner diameter of the operating shaft 5 in the range up to the position of 15 is formed larger than the inner diameter above it. As a result, from the inside of the bellows 4, a plurality of vent holes 32 provided on the outer periphery of the lower end of the operation shaft 5, a gap between the operation shaft 5 and the guide shaft 13,
Vents 15 on the outer circumference of the guide shaft 13 and blind plates for the guide shaft 13
A ventilation path B is formed through the ventilation hole 16 of 17 to reach the inside of the vacuum double container 10 housed in the container body 11.

On the other hand, in the state where the bellows 4 is extended to the maximum extent (FIG. 1), the outer surface of the operation shaft 5 is located at a position 180 ° away from each other above the position where the seal packing 24 of the upper cover 20 of the bellows 4 contacts. A large number of locking grooves 33 having a substantially rectangular cross section are formed at regular intervals in the axial direction. A claw portion 35 of the lock member 7, which will be described later, is locked in the locking groove 33.

The bellows spring 6 has a guide shaft 13 inside the operation shaft 5.
Is accommodated in a space above the upper end of the bellows while being compressed, and the operating shaft 5 is biased upward, that is, in the direction of contracting the bellows 4.

As shown in FIG. 5, the lock member 7 has a claw portion 35 that engages with the engagement groove 33 of the operating shaft 5, a spring receiving portion 36, and a downward slope toward the claw portion 35, as shown in FIG. The slanted surface 37 is formed, and is slidably attached in a direction toward the axis of the operation shaft 5 by engaging with a guide member 38 provided on the lid body 2 of the bellows 4. Then, by the lock spring 40 mounted between the spring holding portion 39 protruding from the lid body 2 and the spring receiving portion 36 of the lock member 7, the claw portion 35 is locked in the locking groove 33 of the operation shaft 5. Being energized.

The operation lever 8 is formed by bending a metal wire as shown in FIG. 2, rotatably attaching both end sides to the lid body 2, and fitting the push knob 41 on the bent side. The middle part is fourth
As shown in the figure, it contacts the inclined surface 37 of the lock member 7. In addition, near the push knob 41,
The spring holding portion 42 and the guide portions 30, 30 of the intake valve 9
A spring retainer plate 45 having guide holes 43, 43 into which are inserted, and guide protrusions 44 provided in the edges of the guide holes 43, 43 and fitted into the guide grooves 31, 31 of the guide portions 30, 30 are attached. There is.

Then, the spring holding portion 42 of the spring holding plate 45
The operating lever 8 is urged upward by a lever spring 46 interposed between the spring receiving portion 29 of the intake valve 9 and the spring.

Reference numeral 47 is a lock member 7 and an operation lever 8 on the lid body 2.
It is a cover that covers.

An operation method of the pump device for the lid 1 of the air pot having the above-described configuration and an operation of each member will be described.

First, as shown by the chain double-dashed line in FIG. 1, the operation shaft 5 is pushed up by the bellows spring 6 and the bellows 4 is contracted. In this state, when the operating shaft 5 is pushed in against the urging force of the bellows spring 6, the inclined surface of the claw portion 35 of the lock member 7 is pushed by the upper inclined wall surface of the locking groove 33 of the operating shaft 5 and moves backward, The bellows 4 inhales air from the intake port 25 and grows over the spaces one after another. Then, when the lower cover 21 of the bellows 4 comes into contact with the lower lid plate 3 and the bellows 4 extends completely, as shown in FIG. 5, the claw portion 35 of the lock member 7 is engaged with the locking groove of the operating shaft 5. It is locked and locked on the lower wall of 33.

When the push knob 41 of the operating lever 8 is pushed down, the pushing force is transmitted to the valve spring 28 via the spring retainer plate 45, the lever spring 46, the valve rod 26 and the valve body 27. At this time, since the spring constant of the valve spring 28 is smaller than the spring constant of the lever spring 46, the valve spring 28 is largely bent, the valve body 27 is pressed against the edge of the intake port 25, and the intake passage A is closed. Further, when the push knob 41 is pushed down, the lever spring 46 bends and the operating lever 8 moves downward while being pressed against the inclined surface 37 of the lock member 7 as shown in FIG. It retreats to the right, and the engagement between the claw portion 35 and the locking groove 33 of the operating shaft 5 is released. As a result, the operating shaft 5 is pushed upward by the urging force of the bellows spring 6.

At this time, the air in the bellows 4 is sent to the container 10 through the ventilation passage B because the intake passage A is closed.
As a result, the air layer in the container 10 is pressurized, and hot water or cold water inside is discharged through the pumping pipe 10a.

When the pressing of the push knob 41 is stopped after the required amount of liquid has been discharged, the operating lever 8 is pushed up by the urging force of the lever spring 46. Accordingly, as shown in FIG. 5, the lock member 7 slides toward the axial center of the operation shaft 5 by the biasing force of the lock spring 40 while the inclined surface 37 of the lock member 7 is in pressure contact with the operation lever 8. The claw portion 35 is fitted and locked in the locking groove 33 of the operation shaft 5 to lock the movement of the operation shaft 5. When the operating lever 8 is further pushed up, the valve spring 28
The intake valve 9 is pushed up by the urging force to open the intake passage A, so that the pressure in the bellows 4 and the container 10 becomes the same as the atmospheric pressure.

In this way, once the operating shaft 5 is pushed in and the bellows 4 is extended, the push knob 41 of the operating lever 8 is pushed down to unlock the lock member 7 and the operating shaft 5, and the bellows spring 6 is used. The bellows 4 is tightened and the liquid is discharged.

Therefore, the amount of liquid to be discharged can be adjusted only by changing the time during which the push knob 41 is pressed down. Further, the push-down force of the push knob 41 is sufficient to release the lock of the locking means 7 regardless of the amount of discharged liquid or remaining liquid, and the operation is simple.

(Effect of the Invention) As is clear from the above description, according to the present invention, once the bellows is extended by operating the first operating means, the air filled in the bellows by the second operating means can be removed. By intermittently or continuously using, the liquid in the container can be dispensed or discharged in a large amount, and the operation is a lock release operation by the second operation means, and the bellows is not directly pressed, so that operability is improved. Has the effect of being good.

[Brief description of drawings]

1 is a sectional view of a lid of an air pot provided with a pump device according to the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along the line II of FIG. 2, and FIG. The drawing is a sectional view taken along line III-III in FIG. 3, and FIG. 5 is a sectional view taken along line II-II in FIG. 4 ... Bellows, 5 ... Operation shaft (first operation means), 6 ... Bellows spring, 7 ... Lock member, 8 ... Operation lever (second operation means), 9 ... Intake valve, 10 ... Vacuum double container, 11 ... Container body, 25 ... Intake port, 32 ... Vent port.

Claims (1)

[Scope of utility model registration request] 1. A bellows having an intake port and a vent communicating with the container, spring means for urging the bellows in a contracting direction, and first operating means for stretching the bellows against the urging force of the spring means. A pump for a liquid container, comprising: a lock means for locking the first operation means at an arbitrary position; and a second operation means for releasing the lock means after closing an inlet of the bellows. apparatus.