JP2002345649A - Lid part heat insulation structure for electric pot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the lid part heat insulation structure of an electric pot improving the heat insulation effect of a lid body by forming an annular recessed part at the lid lower member of the lid body. SOLUTION: The lid part heat insulation structure of the electric pot is provided with a lid upper member made of a synthetic resin forming an outer peripheral surface, a lid lower member made of the synthetic resin forming an inner peripheral surface, a metallic inner lid member arranged on the inner side of the lid lower member, a pressurizing member arranged at the almost center part of the lid upper member and a bellows provided below the pressurizing member. The lid lower member constituting the outer peripheral member of the bellows is recessed in the direction of the pressurizing member and the annular recessed part is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating structure for a lid of an electric pot in which a heat insulating space is formed inside the lid of the electric pot.

[0002]

2. Description of the Related Art A conventional electric kettle has an inner container into which water is put in a container body, and the water in the inner container is heated by a heating means such as a heater provided on an outer surface of a bottom portion of the inner container. Hot water is supplied from a hot water supply port through a hot water supply passage by a manual pump provided on a lid body or an electric pump provided between the inner container and the bottom of the container body, and water in the inner container is heated and boiled by heating means. It has a function to keep hot water after heating and boiling, so that it can always supply hot water at a predetermined temperature, remove the outlet after heating and boiling, move the pot to a favorite place, and supply hot water with a manual pump. It is one of the easy-to-use instruments that can be performed.

[0003] Further, in order to keep the boiling water efficiently, the conventional electric kettle has, for example, an inner container formed of a vacuum heat insulating structure comprising a vacuum double tank. It has been proposed to apply a material to reduce the heat retention power when energized, and to minimize the temperature drop when the outlet is disconnected.

In an electric pot having a manual pump in the lid, the manual pump occupies a considerable portion of the lid, and the inside of the bellows forming the manual pump is substantially closed when the pump is not operated. Since the closed space is formed, this space becomes a heat-insulated space and has a certain degree of heat-insulating function. Therefore, in many cases, no further consideration is given to heat-insulation.

A conventional lid structure of an electric pot having a manual pump in the lid will be described with reference to FIG. 8. Referring to FIG. 8, an inner container b for placing water is arranged in a container body a. The water is heated by an electric heater (not shown) disposed on the outer periphery of the bottom of the inner container b.
Similarly, hot water is supplied by an electric pump (not shown) or a manual pump c made of bellows. A lid d that is opened and closed via a hinge mechanism (not shown) is provided above the inner container b.

The lid d includes an upper lid member e, a lower lid member f, and an inner lid member g attached below the lower lid member f. The manual pump c includes a bellows h and an on-off valve j. When the manual pump c is not operated, the on-off valve j is closed to form a closed space i in the bellows h. A space k is also provided on the outer peripheral portion of the bellows h.
Is formed, but this space k communicates with the atmosphere.

However, in recent years, energy saving has become the most important proposition, and a product with a large energy saving effect has been required. There was still room for improvement. That is, the above-described electric pot having the manual pump in the lid can be expected to have a certain heat insulating effect due to the heat insulating space inside the bellows, but it is still not sufficient.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks. By lowering the lower lid member constituting the outer peripheral member of the bellows in the direction of the pressing member to form an annular concave portion, It is an object of the present invention to improve the heat insulating effect of a lid and to provide a lid heat insulating structure of an electric pot with high energy saving effect.

[0009]

To achieve the above object, the present invention employs the following constitution.

According to the first aspect of the present invention, the synthetic resin upper lid member forming the outer peripheral surface, the synthetic resin lower lid member forming the inner peripheral surface, and the lid lower member are disposed inside the lid lower member. In the heat insulating structure for a lid portion of an electric pot, comprising a metal inner lid member, a pressing member disposed substantially at the center of the upper lid member, and a bellows provided below the pressing member, an outer peripheral member of the bellows A configuration in which the lower lid member is formed to be depressed in the direction of the pressing member to form an annular concave portion.

With this configuration, a double heat insulating space is formed around the bellows and the outer periphery of the bellows except for the steam passage, so that heat can be more reliably released from the lid over a long period of time. Become. In addition, since the center of gravity of the lid moves upward by providing the recess, the opening angle can be reduced when the lid is opened. Further, since the concave portion is formed by the inner and outer double ring-shaped ribs, the strength of the lid portion is increased.

In the invention according to a second aspect, in addition to the configuration of the first aspect, the uppermost surface of the recess is located above the hinge pin. With this configuration, a larger volume of the concave portion can be secured, the heat insulating effect thereof is further enhanced, and the opening angle can be made closer to around 90 ° C. by moving the center of gravity of the lid portion upward.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, at the lower end of the concave portion, the upper lid member and the inner lid member are formed annularly by utilizing packing of the inner lid member. A configuration for sealing. With this configuration, the inner container and the recessed portion can be sealed with one packing, and the upper surface of the packing expands inward, so that the packing is less wrinkled when the packing is attached, Attachment to the inner lid member is facilitated.

According to a fourth aspect of the invention, in addition to the first to third aspects, a heat insulating material is attached to the recess. When the heat insulating material is installed in the concave portion, the heat insulating material can be easily mounted from the lower portion of the concave portion, and after the mounting, the heat insulating effect is further enhanced in combination with the function of the heat insulating space.

[0015]

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

1 to 5 show an electric pot according to the present invention. The electric pot includes a container body 1 having an inner container 3 for storing hot water, a lid 2 for opening and closing the container body 1, an electric heater 4 as heating means for heating the inner container 3, The hot water supply passage 6 for supplying the hot water in the hot water 3 from the hot water supply port 5 and an electric pump 7 for sending out hot water through the hot water supply passage 6 are provided. A handle 60 for carrying the pot is provided on the outer peripheral portion of the container body 1.

The container body 1 includes an outer case 8 made of a synthetic resin forming an outer peripheral surface, and the inner container 3 forming an inner peripheral surface.
And an annular shoulder member 9 made of synthetic resin for connecting the outer case 8 and the inner container 3, a synthetic resin bottom plate 10 constituting a bottom surface, and a groove formed on the outer periphery of the bottom plate 10. And a rotating body 11 that makes the container body 1 rotatable.

At the bottom of the inner container 3, an electric heater 4 such as a mica heater having a heating element held on a mica plate is mounted. At the center of the bottom, a hot water temperature detecting device for detecting the hot water temperature in the inner container 3 is provided. A hot water temperature sensor 12 is provided as a means,
Used for heating and heat retention control. Reference numeral 13 denotes a full water level sensor for displaying the full water level of the inner container 3.

The front side of the pot in which the hot water supply port 5 is provided is inclined toward the front side as shown in FIGS. 2 and 3, and has a substantially triangular shape in plan view as shown in FIG. , A display unit 30 is arranged, and displays such as a timer setting and a temperature display. Further, in the lower space of the display unit 30, there is provided a water stop valve unit 31 including a falling outflow water stop valve 32, an inclined flow water stop valve 33, and the like,
When the pot is tilted and falls, safety measures are taken to close the hot water supply passage 6 and prevent hot water from flowing out.

The lid 2 is made of a synthetic resin upper lid member 14.
And a lower lid member 15 made of a synthetic resin joined to the upper lid member 14 with screws or the like (not shown). Further, a lower portion of the lower lid member 15 faces the open end of the inner container 3. ,
Metal inner lid member 18 functioning as a lid at the open end
Is provided on a hinge receiver 16 provided at a rear portion of the shoulder member 9 via a hinge pin 17 so as to be openable and closable and detachably supported.

The upper lid member 14 has a substantially circular shape, and its cross section has a convex shape projecting gently outward, and as shown in FIGS.
On the front side, there is provided a lid opening member 19. To open the lid, first press down the front side of the lid opening member 19 with a finger, raise the rear side, and then put a finger on the raised portion. The lid 2 is opened by pulling it toward the user. A steam outlet 20 is provided on the rear side of the hinge pin 17 opposite to the lid opening member 19, and communicates with a steam passage 38 a formed in the lid 2, and is generated in the inner container 3. The steam at a predetermined pressure or higher is discharged so that the pressure inside the inner container 3 does not exceed the predetermined pressure.

Further, a lock lever 22 is provided between the lid opening member 19 and the steam discharge port 20 and substantially on the same outer peripheral line as the both, and the lock lever 22 is moved to the "lock" and "open" positions. To switch the operation or non-operation of the manual pump described later.

At a substantially central portion between the lid opening member 19 and the steam discharge port 20, a pressing member 21 as a manual pump is disposed. The pressing member 21 has a cylindrical shape with a bottom and a cross section, and the upper surface thereof has a substantially arc-shaped surface continuous with the upper lid member 14, and has a cylindrical shape which is integrally suspended at a substantially central portion of the upper lid member 14. It is slidably fitted in the body 14a.
On the outer peripheral surface of the cylindrical portion of the pressing member 21, a suitable number of, for example, three, thin vertical ridges 21 a are provided.
Of the cylindrical member 14a of the lid upper member 14, and the protrusion 21a provided on the outer peripheral surface of the cylindrical portion of the pressing member 21. A vertical groove portion 14b is formed so as to be fittable. In fitting the two, the pressing member 21 is fitted from below the lid upper member 14, and a protrusion provided on the outer peripheral surface of the cylindrical portion of the pressing member 21 is formed. This is performed by engaging the ridge 21a with a groove 14b provided in the tubular body 14a of the lid upper member 14. As a result, the upper end of the projection 21a contacts the upper end of the groove 14b,
Since it functions as a stopper, the pressing member 21 does not move upward any further. Of course, it is set to be flush with the upper surface of the lid upper member 14 at that position.

Inside the upper surface of the pressing member 21, a bellows 23 having a spring therein and a plate 25 supporting one end of a spring 24 having a spring force weaker than that of the bellows are integrally connected by screws 26. Have been. A cylindrical member 27 is provided substantially at the center of the plate body 25.
A spring support member 28 having a cup-shaped cross section and having a large-diameter cylindrical portion and a small-diameter cylindrical portion is slidably disposed in the cylindrical member 27.

As shown in FIG. 4, the cylindrical member 27 has
Two longitudinal grooves 29 are provided at axially and radially opposite positions.
Are provided, and the spring support member 28 is provided in the vertical groove 29.
The engagement piece 34 formed on the upper outer periphery of the large-diameter cylindrical portion is engaged. In the engaged state, the end of one spring 24 abuts against the inner surface of the plate 25 and the end of the other spring 24 abuts the inner surface of the large-diameter cylindrical portion of the spring support member 28. With the spring 24 interposed, the spring support member 28 is pressed downward by the action of the spring 24 when the pump is not operating. In this state, the tip of the small-diameter cylindrical portion of the spring support member 28 projects slightly outside the air discharge port 35 provided in the lid lower member 15, and the tip of the small-diameter cylindrical portion has a rubber-like opening / closing valve 36. Is attached.

As described above, one end of the bellows 23 is in contact with the inner surface of the plate 25, and the other end is in contact with the inner surface of the lid lower member 15, and the pressing member 21 is pressed by the spring force of the bellows 23. The upper end of the ridge 21a is the groove 1
Since the pressing member 21 is always pressed upward until it comes into contact with the upper end of the pressing member 4b, the pressing member 21 occupies the position shown in FIGS. With such a configuration, when the manual pump is not operated, the internal space 37 of the bellows 23 forms a closed space, so that the internal space 37 has a heat insulating function.

The shape of the lower lid member 15 which is a feature of the present invention will be described. The lower lid member 15 has a substantially bowl-shaped cross section made of resin and has a substantially circular shape in plan view. It is integrally attached to the upper member 14.
A steam passage wall 38 which is a part of the steam passage 38a communicating with the steam discharge port 20 is formed on the rear side of the hinge pin 17 side.

An outer annular wall 39 and an inner annular wall 40 hang down around the bellows internal space 37, and both annular walls 39, 40 form a horizontal upper wall 41.
5 to form a substantially C-shaped recess 42 as shown in FIG. The portion where the concave portion 42 is not provided in FIG. 5 is because the steam passage 38a is formed. This steam passage 38
As long as it can be provided at a position where "a" does not interfere, the concave portion 42 may of course be provided in a ring shape.

The outer annular wall 39 has a slightly open shape, and its lower end 39a forms an outer open end. When the inner cover member 18 is attached to the lower cover member 15, the inner cover The length is set so as to hang down to the vicinity of the member 18. Further, from the outer peripheral edge of the lower part of the outer annular wall 39, a horizontal wall 39 is formed.
b extends outward and the horizontal wall 3
A vertical wall 39c further extends upward from the outer peripheral end of 9b, and its tip reaches the inner wall of the lid upper member 14,
A locking piece 39d that can be engaged with a locking piece provided on the inner surface of the lid upper member 14 is provided at the distal end. There are several attachment positions of the locking pieces 39d on the outer peripheral edge where the horizontal wall 39b extends upward and abuts on the inner wall of the lid upper member 14.

The outer annular wall 39 and the horizontal wall 39
b and the horizontal wall 39b form an upper opening space 39c. By forming the concave fitting portion 42 in the lower lid member 15 in such a shape, the internal space 43 in the concave fitting portion 42 can be larger, and the strength of the lower lid member 15 can be sufficiently maintained. it can. Further, the upper opening space 39
By providing c, this space also has a heat insulating function, and the overall heat insulating effect can be further enhanced.

The inner annular wall 40 is connected to the outer annular wall 3.
9 is a substantially vertical wall formed inside 9 and is composed of an upper wall portion 40b and a lower wall 40a, and between the two walls 40b and 40a,
An indented step 40c is formed inward.

The horizontal top wall 41 of the recess 42 is
As high as possible, that is, the mating surface of the upper lid member 14 and the shoulder member 9 when the lid is closed (the EE line shown in FIGS. 4 and 7) and / or
Or hinge pin 17 (FF line shown in FIGS. 4 and 7)
When the height is set to be higher, the internal space 43 of the recess 42 can be sufficiently secured, and the center of gravity of the lid 2 can be further raised. Horizontal top wall 41 shown in FIGS.
Is not illustrated as a position higher than the mating surface between the lid upper member 14 and the shoulder member 9 when the lid is closed and the hinge pin 17, but a lid opening member 19 is provided above this portion. This is because the height is reduced to avoid the opening member 19. That is, a step portion 44 is formed in this portion as shown in FIG. The step portion 44 functions as a reinforcing rib in combination with the outer annular wall 39 and the inner annular wall 40 to increase the strength of the lid lower member 15. In this embodiment, as shown in FIG. 5, a plurality of short ribs 45 are provided radially to further increase the strength.

In the center of the lower surface of the lid lower member 15, a recess 47 is formed by the inner annular wall 40, and a resin cap 46 is provided in the recess 47 on the lower wall 40 a of the inner annular wall 40. It is attached by screwing a screw into a screw hole 48 shown in FIG. In addition, the attachment with this screw is
It is performed at the same time as mounting.

The cap 46 is provided with a first steam port 49 and a falling water stop valve 51 for closing the first steam port 49 when the pot is overturned, at the rear side of the hinge pin 17 at the position after the cap is attached. A second steam port 50 provided in a central portion and a steam passage 52 extending forward from the second steam port 50 are provided therein, and are introduced from a first steam port 49 on the rear side. The steam in the inner container 3 is once sent to the front side via the second steam port 50 and the steam passage 52.

Outside the recess 47, a circular rib 53 having two communication passages 47b on the front side (opposite to the hinge pin 17) is provided. Outside the circular rib 53, a circular ring is further provided. A space 47a is formed.
The steam once sent to the front side through the steam port 50 and the steam passage 52 exits into the annular space 47a through the communication passage 47b, and then moves backward in the annular space 47a along the circular rib 53 as shown in FIG. And is discharged to the atmosphere from the steam discharge port 20 with the temperature lowered as much as possible through a steam passage 38a formed on the rear side.

Reference numeral 18 denotes a metal inner lid member, which is integrally attached to the screw hole 48 with a screw at the same time when the cap 46 is attached. In addition, this inner lid member 1
8 is a ring-shaped packing 54 for contacting the upper end of the inner container 3 when the lid is closed to seal the inner container 3.
After the inner lid member 18 and the cap 46 are integrally mounted together with screws, the upper surface of the packing 54 comes into contact with the lower surface of the lower lid member 15 and the concave portion 42 A sealed internal space 43 is formed therein. As a result, substantially the entire space in the lid 2 is formed in the lid 2, which includes the sealed internal space 37 formed in the bellows 23 and the sealed internal space 43 formed in the recess 42. Is formed, and the heat insulating effect is greatly enhanced.

FIG. 6 shows a modified example of the packing 54, in which an extension 55 is provided in which the upper surface of the lower member 15 abuts against the lower surface of the horizontal wall 39b and the upper surface of which is further expanded inward. Tip 39a of outer annular wall 39 of lower member 15
With such a shape, the sealing between the lower lid member 15 and the inner lid member 18 is further enhanced, and the heat insulating effect is further enhanced. Further, since the extension 55 is provided, when the packing 54 is attached to the outer peripheral end of the inner lid member 18, the annular groove 54 a of the packing 54 is fitted to the outer peripheral end of the inner lid member 18 while stretching the packing 54. In this case, the extending portion 55 comes into contact with the inner surface of the inner cover member 18 almost uniformly, so that the packing 54 is partially pulled and the other portion is waved. Such adverse effects are reduced. Therefore, attachment of the packing 54 becomes easy.

FIG. 7 shows an example in which a heat insulating material 56 is further provided in the internal space 43 in the recess 42. This heat insulating material 56
Any material, such as a foam material or a vacuum heat insulating material, may be used. By including the heat insulating material 56 in this way, the heat insulating effect is dramatically increased in combination with the heat insulating space. The other structure of this example is the same as that of FIGS. 1 to 5, and the description is omitted.

The present invention is not limited to the configuration of the above-described embodiment, and it is needless to say that the design can be appropriately changed without departing from the gist of the invention.

[0040]

According to the first aspect of the present invention, the lower lid member constituting the outer peripheral member of the bellows is depressed in the direction of the pressing member,
By forming an annular concave portion and making this concave portion a heat insulating space, a bellows is formed on the lid except for the steam passage, and a double heat insulating space is formed on the outer periphery of the bellows,
The escape of heat from the lid can be more reliably and extremely reduced over a long period of time, and energy can be saved.

Further, since the center of gravity of the conventional lid is located at the lower side, there is a disadvantage that the lid is automatically closed unless the opening angle is made large when opening the lid.
When the opening angle is set to be large, when the opening angle is set to be large, there is a problem that the dew attached to the lid bottom hangs down on the hinge portion and flows out from the hinge portion to the outer peripheral portion of the container.

By adopting the above configuration, the center of gravity of the lid moves upward, so that the opening angle can be reduced when the lid is opened, so that compactness can be achieved and stability can be improved.

Further, by reducing the opening angle,
It is possible to eliminate dripping on the hinge portion. Further, since the concave portion is formed by the inner and outer double ring-shaped ribs, the strength of the lid portion is increased, deformation can be prevented, and the thickness can be reduced.

In the invention according to claim 2, the uppermost surface of the recess is located above the hinge pin, so that
In addition to the effect of the invention according to claim 1, since a larger volume of the recess can be secured, the heat insulating effect can be more reliably enhanced, and the center of gravity of the lid can be moved upward, Since the opening angle can be made closer to around 90 ° C., the size can be further reduced, and the stability can be improved.

According to the third aspect of the present invention, an annular seal is formed between the upper lid member and the inner lid member at the lower end of the concave portion by using packing of the inner lid member. In addition to the effects of the invention according to (2), since the inner container and the concave portion can be sealed with one packing, it is not necessary to use a special packing for sealing the concave portion, and the cost can be reduced. it can. Further, since the upper surface of the packing extends inward, the packing can be easily attached to the inner lid member.

According to the fourth aspect of the present invention, by attaching a heat insulating material to the concave portion, in addition to the effects of the inventions according to the first to third aspects, the heat insulating material is easily fitted into the formed concave portion from below. Therefore, the assembling can be simplified, and the heat insulating effect can be more reliably enhanced.

[Brief description of the drawings]

FIG. 1 is a plan view of a lid of an electric pot of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of a lid of FIG. 2;

FIG. 4 is an enlarged sectional view of the BB line cover part of FIG. 1;

FIG. 5 is a bottom view of the electric pot lid of the present invention.

FIG. 6 is an enlarged cross-sectional view showing a part of the packing held between the recessed portion and the inner lid member of the present invention.

FIG. 7 is an enlarged sectional view of the BB line cover portion of FIG.

FIG. 8 is an enlarged sectional view of a lid portion of a conventional electric pot.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Container main body 2 ... Lid 3 ... Inner container 4 ... Electric heater 5 ... Hot water supply port 6 ... Hot water supply passage 7 ... Electric pump 8 ... Outer case 10 ... Bottom plate 12 ... Hot water temperature sensor 14 ... Top cover member 15 ...
Lower lid member 17 Hinge pin 18 Inner lid member 19 Lid opening member 20 Steam outlet 21 Pressing member 22 Lock lever 23 Bellows 24 Spring 25 Plate 26 26 Screw 27 Cylindrical member 28 Spring support Member 29 ... Vertical groove 30 ... Display unit 31 ... Water stop valve unit 32 ... Falling outflow water stop valve 33 ... Inclined flow water stop valve 35 ...
Air discharge port 36 ... On-off valve 37 ... Internal space 38 ... Steam passage wall 38a ... Steam passage 39 ... Outer annular wall 40 ... Inner annular wall 41 ... Top wall 42 ... Depressed portion 43 ... Inner space portion 44 ... Step 45 ... Rib 46 ... cap 48 ... screw hole 51 ... falling water stop valve 52 ... steam passage 53 ... circular rib 54 ... packing 55 ... extension 56 ... heat insulating material

Claims (4)

[Claims] 1. An upper lid member made of synthetic resin forming an outer peripheral surface, a lower lid member made of synthetic resin forming an inner peripheral surface, and an inner lid member made of metal disposed inside the lower lid member And a pressing member disposed at a substantially central portion of the lid upper member, and a lid heat insulating structure of an electric pot including a bellows provided below the pressing member, wherein the lower part constituting the outer peripheral member of the bellows is provided. A lid heat insulating structure for an electric pot, wherein a member is recessed in the direction of the pressing member to form an annular recess. 2. The heat insulating structure of an electric pot according to claim 1, wherein an uppermost surface of the recess is located above a hinge pin. 3. An annular seal between the upper lid member and the inner lid member using a packing of the inner lid member at a lower end portion of the concave portion. Insulation structure for lid of electric pot. 4. A heat insulating structure for a lid of an electric pot according to claim 1, wherein a heat insulating material is attached to said concave portion.