WO2017188310A1 - Electrical moxibustion apparatus - Google Patents

Abstract

This electrical moxibustion apparatus (100) has a case (10) and a treatment part (20) attached to the case (10). The treatment part (20) has: a treatment body (30) that has a tip end part (30a), an inside surface (30b), and an extension part (32) which is recessed toward the tip end part (30a) and opens to the case side, has an accommodation part (31) formed therein, and is spaced apart from the inside surface (30b); and a heating body (43) arranged in the accommodation part (31).

Description

Electric water heater

The present invention relates to an electric water heater.

Conventionally, the so-called acupuncture points of the human body are warmly stimulated to promote blood circulation and to activate the body associated therewith. In order to carry out such warmth stimulation easily, an electrical warmer has been proposed (see, for example, Patent Document 1). The electric water heater has a flat plate-like heating element, presses the main surface of the heating element toward a hemispherical heating element provided at the tip, and from the main surface of the heating element through the heating element, Transfer heat to the desired site.

JP 2003-675 A

By the way, when warming stimulation is performed, it is known that the blood circulation promoting effect and the activation of the body are accompanied by applying heat to a narrow range corresponding to the pot as described above. For this reason, it is preferable to make the treatment part of an electric water heater into a thin shape. In addition, in the treatment of hot water, the treatment part is quickly heated, so that the treatment time can be shortened and burns and the like can be prevented.

On the other hand, if the treatment part has a thin shape, a small heating element must be used when a heating element is to be provided near the treatment part. When the heating element is small, it is difficult to transmit heat necessary for the treatment to the treatment part, and there is a problem that the treatment part cannot be heated quickly. Also, when trying to quickly heat the treatment area by enlarging the heating element, it becomes difficult to provide the heating element near the treatment area because the treatment area is thin, and heat is conducted to the treatment area. It takes a long time, and there arises a problem that the treatment part cannot be heated quickly.

This invention was made in order to solve the said subject, The objective is to provide the electric water heater which can apply a suitable heat easily.

An electric water heater that solves the above problems includes a case and a treatment portion attached to the case, and the treatment portion is recessed toward the distal end portion, the inner surface, and the distal end portion. Including a treatment body that has an extending portion that opens on the case side, forms an accommodating portion on the inside, and is spaced apart from the inner surface, and a heating element disposed in the accommodating portion.
According to this configuration, the heat of the heating element disposed in the housing portion formed inside the treatment portion is difficult to be transmitted to the inner surface, and heat can be efficiently transmitted to the distal end portion of the treatment portion. Become. As a result, a short time is required until the distal end of the treatment portion reaches a predetermined temperature.

The heating element is a plate-like heating element that is disposed in the accommodating portion and includes one main surface that is disposed to face the surface of the extending portion, and the electric warmer includes the heating element. It is preferable to include a pressing member that presses the surface of the extending portion in a direction intersecting with the direction from the tip portion toward the case.

According to this configuration, the heating element is arranged in parallel to the direction in which the main surface of the heating element extends from the distal end portion of the treatment body toward the case, and is pressed in a direction intersecting with the direction from the distal end portion toward the case. . The heat of the heating element is transmitted from the main surface of the heating element to the distal end portion of the treatment body through the extending portion, and the distal end portion of the treatment body is heated. In the treatment portion, the side surface of the heating element is disposed so as to face the distal end of the treatment body. Therefore, the distal end portion of the treatment body can be sized according to the thickness of the heating element and the extending portion. For this reason, compared with what arrange | positions a heat generating body with the main surface of a heat generating body facing the front-end | tip part of a treatment body, it can arrange | position a heat-generation body close to the front-end | tip part of a treatment body, using a big heat generation body. . Moreover, it becomes possible to make the front-end | tip part of a treatment body into a taper shape, and it can be made easy to apply a heat | fever suitably to a desired site | part with the taper front-end | tip part. In the present specification, “parallel” is intended not to intersect within the treatment area, and includes the state of two objects that are parallel at a slight angle.

In the electric warmer described above, the treatment section is disposed between the first electrode plate disposed between the heating element and the extension part, and between the heating element and the pressing member. It is preferable to have a second electrode plate.

According to this configuration, the second electrode plate, the heating element, and the first electrode plate are pressed toward the surface of the extending portion by the pressing member. Thereby, the first electrode plate and the second electrode plate are brought into close contact with both main surfaces of the heating element by the pressing member. For this reason, the electrical connection between the first electrode plate and the second electrode plate is ensured with respect to the heating element.

In the electric warmer described above, the extension portion is a first extension portion, and extends from the tip portion toward the case, and has a second surface facing the surface of the first extension portion. It is preferable that an extension portion is provided, and the pressing member is disposed between the second extension portion and the second electrode plate.

According to this configuration, the heating element and the pressing member are disposed between the first extension part and the second extension part. And a heat generating body can be pressed with respect to a 1st extension part with the press member arrange | positioned between a 2nd electrode plate and a 2nd extension part.

In the electric warmer described above, it is preferable that the treatment portion has a heat conduction member disposed between the extension portion and the heating element.
According to this configuration, by ensuring reliable heat transfer by the heat conducting member, the heat of the heating element is efficiently transmitted to the extending portion, and thus the distal end portion of the treatment body.

In the above electric heater, it is preferable that the treatment portion includes a heat conduction member having flexibility and disposed between the heating element and the extension portion.
According to this configuration, the contact area between the main surface of the heating element and the heat conducting member, and the contact area between the heat conducting member and the surface of the extending part are flexible like the heating element and the extending part. It becomes large compared with the contact area when things with low property are made to contact each other directly. And by arrange | positioning the heat conductive member between the 1st electrode plate and the extension part, the heat of a heat generating body is efficiently transmitted to the extension part via a 1st electrode plate and a heat conductive member. The For this reason, the heat of a heat generating body is efficiently transmitted to the extension part and by extension, the front-end | tip part of a treatment body.

In the electric heater, the contact area between the pressing member and the second electrode plate is preferably smaller than the contact area between the extending portion and the heat conducting member.
According to this configuration, heat transfer from the heating element to the pressing member is suppressed, and the heat of the heating element is efficiently transmitted to the distal end portion of the treatment body via the first extending portion.

One of the connection boards having a wiring pattern made of a heat insulating material, attached to the case side end of the treatment body, closing the opening of the housing portion, and supplying power to the heating element. It is preferable to have a connection member to which the end portions of the two are connected.

According to this structure, it is reduced that the heat | fever of a treatment body is transmitted to the connection board | substrate connected to a case or a heat generating body with the connection member which consists of heat insulation materials.
In the electric warmer described above, it is preferable that the connection member has an insertion portion that is inserted into the housing portion of the treatment body and whose tip surface is curved along the side surface of the heating element.

According to this configuration, the movement of the heating element is restricted by the insertion portion inserted in the accommodation portion of the treatment body. For this reason, the position shift of the heating element with respect to the extending portion is suppressed, and the distal end portion of the treatment body is stably heated by the heat of the heating element.

According to the electric water heater of the present invention, suitable heat can be easily applied.

The perspective view which shows the outline of an electric heater. The cross-sectional perspective view of the treatment part of the electric water heater of 1st Embodiment. Sectional drawing of the treatment part of the electric water heater of 1st Embodiment. Sectional drawing of the treatment part for demonstrating the effect | action and effect of the electric water heater of 1st Embodiment. Sectional drawing of the treatment part of the electric water heater of a comparative example. The perspective sectional view showing the tip part of the electric water heater of a 2nd embodiment. (A)-(c) is a perspective view which shows the treatment part of the electric water heater of FIG. The perspective view which shows several members attached to a treatment body and a treatment body. The top view of the treatment body seen from the base end side. Sectional drawing which shows the member accommodated in the treatment body and the treatment body. Sectional drawing which shows the member accommodated in the treatment body and the treatment body. The perspective view which shows a treatment body and a connection member. Sectional drawing which shows the state of a treatment body and a connection member (insertion part). (A) (b) is schematic which shows the modification of a treatment body. Schematic which shows the modification of a treatment body. Schematic which shows the modification of a treatment body. Schematic which shows the modification of a treatment body.

Hereinafter, an electric water heater according to some embodiments will be described. In the accompanying drawings, components may be shown in an enlarged manner for easy understanding. The dimensional ratios of the components may be different from the actual ones or in other drawings. Further, in the cross-sectional view, some components may not be hatched for easy understanding.

As shown in FIG. 1, the electric water heater 100 includes a case 10 and a treatment portion 20 attached to the distal end portion 10 a of the case 10.
The case 10 has an appropriate size and shape that is easily gripped by the user. Specifically, the case 10 has a substantially rod-like shape. The case 10 has a substantially triangular outer shape in a cross section orthogonal to the extending direction. The treatment portion 20 attached to the distal end portion 10a of the case 10 is formed in a substantially triangular pyramid shape. And the front-end | tip part 10a of the case 10 is formed in what is called a taper shape which curves below and is so thin that the front-end | tip part is closer to the treatment part 20. FIG.

The case 10 is composed of an upper case 11 and a lower case 12. As shown in FIG. 6, fixing portions 11 a and 12 a are formed in the upper case 11 and the lower case 12, and these fixing portions 11 a and 12 a are fixed to each other by screws 13.

As shown in FIG. 1, an operation unit 14 is disposed in the case 10 (upper case 11). The operation unit 14 is formed so as to extend along the longitudinal direction of the case 10. The operation unit 14 is provided with a power switch 15, a display unit 16 (indicated by a broken frame in the figure), and temperature change switches 17 and 18. The power switch 15, the display unit 16, and the temperature change switches 17 and 18 are sequentially arranged in this order from the rear part of the operation unit 14 toward the tip. The power switch 15 and the temperature change switches 17 and 18 are, for example, push switches. The display unit 16 is, for example, a liquid crystal display device (LCD).

The case 10 houses a battery as a driving power source, a control circuit (not shown) for controlling the temperature of the heating element 43 (see FIG. 6) included in the treatment unit 20, and the like. The battery is, for example, a secondary battery, and the case 10 houses a charging circuit (not shown) that charges the battery. The control circuit operates based on the operation of the power switch 15 disposed in the operation unit 14. Then, the control circuit changes the set temperature of the treatment body 30 to be described later based on the operation of the temperature change switches 17 and 18 provided in the operation unit 14 and displays the set temperature on the display unit 16. . Further, the control circuit detects the temperature of the treatment body 30 and controls the temperature of the heating element 43 (see FIG. 6) included in the treatment body 30 so that the temperature of the treatment body 30 is set as the set temperature.

The structure of the treatment section 20 of the first embodiment will be described with reference to FIGS. The treatment unit 20 includes a treatment body 30 and a heating element 43. The treatment body 30 includes a distal end portion 30a, an inner side surface 30b, and an extending portion that is recessed toward the distal end portion 30a and opens toward the case, forms an accommodating portion 31 on the inner side, and is separated from the inner side surface 30b. 32, 33. The heating element 43 is disposed in the housing portion 31.

The distal end portion 30a of the treatment body 30 constitutes the distal end of the electric water heater 100 (see FIG. 1). The treatment body 30 is tapered toward the distal end portion 30a. The treatment body 30 has a proximal end opening 30c.

2, 3, and 4, the treatment body 30 is formed in a hollow shape. At least one, for example, a pair of extending portions 32 and 33 is provided inside the treatment body 30. The accommodating portion 31 is formed inside the extending portions 32 and 33.

The extending portions 32 and 33 are provided so as to stand up from the inner side surface 30 b of the treatment body 30. The extending portions 32 and 33 have a shape extending from the distal end portion 30a side toward the proximal end opening 30c (the side where the case 10 is located). In the example of FIG. 2, the extending portions 32 and 33 stand up perpendicularly to the inner side surface 30 b of the treatment body 30. The extending portions 32 and 33 can function as reinforcing ribs that increase the mechanical strength of the treatment portion 20.

A stepped portion 25 and a recessed portion 26 are provided inside the treatment body 30 between, for example, the extending portions 32 and 33. The concave portion 26 forms a sensor accommodating portion 34 that extends from the position of the step portion 25 toward the side closer to the distal end portion 30a.

The extending parts 32 and 33 and the step part 25 position the heating element 43 arranged in the accommodating part 31. The extending parts 32 and 33 and the recessed part 26 position the temperature sensor 46 disposed in the sensor housing part 34. A concave portion 22 is provided in a portion corresponding to the accommodating portion 31 between the extending portion 32 and the extending portion 33 in the inner side surface 30 b of the treatment body 30. The recess 22 forms a space for allowing the temperature sensor 46 (lead wire 46b) to be disposed.

The extending portion 32 faces the inner side surface 30b of the treatment body 30 through the gap 23a. Similarly, the extension part 33 opposes the inner side surface 30b of the treatment body 30 through the space | gap 23b. In other words, a gap 23a (a space for heat insulation) is provided between the inner side surface 30b of the treatment body 30 and the extension part 32, and a gap 23b (between the inner side face 30b of the treatment body 30 and the extension part 33 ( A space for heat insulation).

The heating element 43 has a plate shape and the outer shape is circular (that is, the heating element 43 has a disk shape). The heating element 43 can be joined to the pair of electrode plates 42 and 44 or have the electrode plates 42 and 44. In the illustrated example, the electrode plates 42 and 44 are joined to the main surfaces 43 a and 43 b of the heating element 43. The electrode plates 42 and 44 can be connected to the power supply leads (see FIG. 7) or have power supply leads. As described above, the heating element 43 is disposed in the accommodating portion 31 provided inside the treatment portion 20.

The heating element 43 is composed of a PTC heater, for example, and generates heat when power is supplied through the electrode plates 42 and 44. The heat generated in the heating element 43 is transmitted from the main surfaces 43 a and 43 b of the heating element 43 to the electrode plates 42 and 44. The electrode plate 42 (first heat generating surface) is disposed so as to face the extending portion 32 of the treatment body 30 and raises the temperature of the extending portion 32. Similarly, the electrode plate 44 (second heat generating surface located on the side opposite to the first heat generating surface) is disposed so as to face the extending portion 33 of the treatment body 30, and the temperature of the extending portion 33 is increased. Let

Preferably, the electrode plate 42 of the heating element 43 is in contact with the extended portion 32 of the treatment body 30 with a sufficient contact area. Similarly, the electrode plate 44 (joint portion 33a) of the heating element 43 is preferably in contact with the extending portion 33 of the treatment body 30 with a sufficient contact area.

The temperature sensor 46 has a sensor body or temperature sensing portion 46a and a pair of lead wires 46b and 46c. The temperature sensor 46 (temperature sensing part 46 a) is disposed in a sensor housing part 34 provided inside the treatment part 20. The lead wire 46 b is pulled out rearward and connected to a control circuit provided in the case 10. The lead wire 46c is pulled out backward through the recess 22 provided in the treatment portion 20) and connected to a control circuit provided in the case 10.

Referring to FIG. 4, according to the electric warmer 100 provided with the treatment portion 20, the heating element 43 is disposed in the accommodating portion 31 formed inside the treatment portion 20 (the treatment body 30). The heating element 43 is no longer disposed in the case 10 and is located in the treatment section 20 that is a direct target for raising the temperature. Thereby, the distance between the heat generating body 43 and the front-end | tip part 30a of the treatment part 20 can be shortened. It can suppress that the thermal resistance of the path | route from the heat generating body 43 to the front-end | tip part 30a of the treatment part 20 becomes large, and a temperature difference and the time difference of a temperature change arise between the heat-generating body 43 and the front-end | tip part 30a by extension. It becomes possible to suppress.

Moreover, in the electric water heater 100, the inner surface 30b of the treatment part 20 is opposed to the extension part 32 from the outside via the gap 23a. Similarly, the inner side surface 30b of the treatment portion 20 faces the extending portion 33 from the outside via the gap 23b. The heat generated in the heating element 43 is configured to be transmitted toward the distal end portion 30a of the treatment portion 20, and the heat is difficult to be transmitted to portions other than the distal end portion 30a of the treatment portion 20. Therefore, the heat can be efficiently transmitted to the distal end portion 30a of the treatment portion 20 (see the white marks in FIG. 4). It takes a short time until the distal end portion 30a of the treatment section 20 reaches a predetermined temperature, and power consumption can be reduced. Part or all of the gaps 23a and 23b and the extending portions 32 and 33 function as a heat transfer direction control structure.

The distal end portion of the electric warmer 100 (the distal end portion 30a of the treatment portion 20) is oriented in a predetermined direction, and the heat generated by the heating element 43 is locally collected at the distal end portion 30a of the treatment portion 20. Has been. The practitioner or user is intended to perform the treatment after recognizing the locally heated portion.

FIG. 5 is a cross-sectional view of the treatment portion 20z in the comparative example. In the comparative example, the extending portions 32 and 33 of the first embodiment are omitted. The treatment body 30z of the comparative example holds the heating element 43 by directly sandwiching the heating element 43 from both sides without passing through the extending portions 32 and 33 and the gaps 23a and 23b. Therefore, the heat generated in the heating element 43 is easily dissipated (see the white arrow in FIG. 5), and the heat is not efficiently transmitted to the distal end portion 30a of the treatment portion 20z.

That is, as in the first embodiment, the inner side surface 30b of the treatment portion 20 is configured to face the extension portions 32 and 33 from the outside via the gaps 23a and 23b, so that heat is applied to the treatment portion 20. It is possible to efficiently transmit to the tip portion 30a. Instead of providing the gaps 23a and 23b, a heat insulating member having high heat insulating performance (low heat transfer coefficient) may be provided. Or you may arrange | position a heat insulation member in a part or all of the space | gap 23a, 23b. As this heat insulating member, at least a member having a heat transfer coefficient lower than the heat transfer coefficient of the member constituting the treatment portion 20 is selected.

As described above, according to the first embodiment, the following effects are obtained.
(1) The electric heater 100 includes a case 10 and a treatment portion 20 attached to the case 10. The treatment unit 20 includes a treatment body 30 and a heating element 43. The treatment body 30 includes a distal end portion 30a, an inner side surface 30b, and an extending portion that is recessed toward the distal end portion 30a and opens toward the case, forms an accommodating portion 31 on the inner side, and is separated from the inner side surface 30b. 32. The heating element 43 is disposed in the housing portion 31. According to this configuration, the heat of the heating element 43 disposed in the accommodating portion 31 formed inside the treatment portion 20 is difficult to be transmitted to the inner side surface 30b, and the tip portion 30a of the treatment portion 20 is efficiently heated. Can be communicated. As a result, it takes a short time before the distal end portion 30a of the treatment portion 20 reaches a predetermined temperature.

Next, the treatment part of the second embodiment will be described. As shown in FIGS. 7A and 7B, the treatment section 20 of the second embodiment includes a treatment body 30, an elastic member 50, a connection member 60, and a connection substrate 70.

As shown in FIG. 1, the treatment body 30 and the elastic member 50 are integrally assembled to the case 10. The surfaces of the treatment body 30 and the elastic member 50 are continuously formed from the distal end portion 10 a of the case 10 to the elastic member 50 and the treatment body 30. Thereby, the front-end | tip part of the electric heater 100 is formed in what is called a taper shape.

As shown in FIG. 7A, the elastic member 50 is formed with an engagement groove 51 along the circumferential direction thereof, and the engagement protrusion 51b at the tip of the case 10 shown in FIG. Are engaged. The treatment body 30 is fixed to the distal end portion 10 a of the case 10 via the elastic member 50 by the engagement groove 51 and the engagement convex portion 10 b.

As a material of the treatment body 30, for example, ceramics such as alumina (aluminum oxide), zirconium, titanium, and the like can be used. The treatment body 30 has high thermal conductivity. Moreover, this treatment body 30 has high biocompatibility and a good touch.

As the material of the elastic member 50, for example, rubber can be used. By using the elastic member 50 in this way, the treatment body 30 is elastically held at the distal end portion of the case 10. As shown in FIG. 6, in the treatment body 30, the outer surface of the end portion on the case 10 side (base end) is covered with an elastic member 50 having low thermal conductivity. The elastic member 50 suppresses heat transfer from the treatment body 30 to the case 10. In addition, the elastic member 50 prevents liquid or the like from entering the electric heater 100.

A connecting member 60 is attached to the proximal end (end portion on the case 10 side) of the treatment body 30. In the second embodiment, the connection member 60 is formed in a triangular shape in a side view. As shown in FIG. 12, the connection member 60 has two locking pieces 62a and 62b. The locking pieces 62 a and 62 b engage with locking holes 35 a and 35 b formed in the treatment body 30. The connection member 60 is attached to the treatment body 30 by this engagement. The connection member 60 attached in this way closes the opening of the accommodating portion 31 included in the treatment body 30.

The connecting member 60 is made of a heat insulating material. As the heat insulating material, for example, a glass epoxy resin, an acrylic resin, a liquid crystal polymer, or the like can be used. Such a connection member 60 suppresses heat transfer from the treatment body 30 to the case 10 and the inside of the case 10.

As shown in FIG. 7B, one end of the connection board 70 is fixed to the end face of the connection member 60 on the case 10 side (the end face on the drawing front side in the drawing), and the other end of the connection board 70 is accommodated in the case 10. It is connected to a control circuit (not shown). A through hole 71 is formed in the connection substrate 70. The fixing portion 11 a of the upper case 11 is inserted through the through hole 71. In this manner, the case 10 can be reduced in size by avoiding interference between the fixing portion 11a and the connection substrate 70.

In the connection substrate 70, the wirings 72a and 72b and the wirings 73a and 73b are formed so as to pass through the substrate portions 70a and 70b separated by the through holes 71. The wirings 72a and 72b are used to electrically connect a heating element 43 and a control circuit (not shown), which will be described later, to supply current to the heating element 43, and the wiring width corresponding to the current to the heating element 43. Is set to The wirings 73a and 73b are used to electrically connect a temperature sensor 46, which will be described later, and a control circuit (not shown), and to transmit a detection signal from the temperature sensor 46 to the control circuit.

As shown in FIG. 7C, the connection member 60 is formed with insertion holes 61a, 61b, 61c. The insertion holes 61a, 61b, 61c are formed so as to extend from the treatment body 30 side toward the case 10 side (right front side in the drawing). Feeding leads 42b and 44b (see FIG. 8) of the electrode plates 42 and 44 are inserted through the insertion holes 61a and 61b. Lead wires 46b and 46c (see FIG. 8) of a temperature sensor 46 described later are inserted through the insertion hole 61c. The leading ends of the power supply leads 42 b and 44 b and the lead wires 46 b and 46 c protrude from the case side end surface of the connection member 60. Then, as shown in FIG. 7B, the power supply leads 42 b and 44 b and the lead wires 46 b and 46 c are connected to the connection substrate 70.

As shown in FIG. 10, the treatment body 30 is formed with an accommodating portion 31. The accommodating portion 31 is recessed toward the distal end portion 30a of the treatment body 30, and is formed to open to the case 10 side. As shown in FIG. 8, the accommodating portion 31 accommodates a heat conducting member 41, an electrode plate 42, a heating element 43, an electrode plate 44, a pressing member 45, and a temperature sensor 46.

As shown in FIGS. 9 and 10, the treatment body 30 has two extending portions 32 and 33. As shown in FIG. 6, the extending portions 32 and 33 are formed so as to extend from the tip portion 30 a toward the opening of the housing portion 31, that is, from the tip portion 30 a toward the case 10. These extending portions 32 and 33 are separated from the inner side surface 30 b of the treatment body 30. The two extending portions 32 and 33 have opposing surfaces 32a and 33a that face each other. These facing surfaces 32a and 33a are formed substantially parallel to the direction in which the extending portions 32 and 33 extend, that is, the direction from the distal end portion 30a to the case 10.

In addition, you may provide a heat insulating member even if it is a space | gap (refer to space | gap 23a, 23b of FIG. 2) between the extension parts 32 and 33 and the inner surface 30b of the treatment body 30. FIG.
As shown in FIG. 8, the heating element 43 has a plate shape, and the outer shapes of the two main surfaces 43a and 43b in the thickness direction are, for example, circular. In the second embodiment, the heating element 43 is a positive temperature coefficient (PTC) thermistor. The heating element 43 is mainly composed of a ceramic body of a metal oxide semiconductor mainly composed of barium titanate (BaTiO ₃ ) and silver (Ag) formed on the main surfaces 43a and 43b in the ceramic body. Electrode.

The heat conducting member 41 is located between the extending part and the heating element. The heat conducting member 41 can have flexibility, and is formed in a circular sheet shape in the second embodiment. As the material of the heat conducting member 41, a heat radiating material having high heat conductivity can be used. For example, an acrylic, epoxy, or silicon-based adhesive, a gel heat radiating material, a heat radiating material made of a metal material having high heat conductivity It may be.

The electrode plate 42 has a connecting portion 42a and a power supply lead 42b. The connection part 42a is formed in a circular thin plate shape. The outer diameter of the connecting portion 42 a is set to be larger than the outer diameter of the heating element 43. The power supply lead 42b is formed in a plate shape extending linearly from the end of the connection portion 42a. The power supply lead 42b is electrically connected to the wiring of the connection board 70 shown in FIG. A protruding portion 42c is formed at the end of the connecting portion 42a.

Similarly, the electrode plate 44 has a connecting portion 44a and a power feed lead 44b. The connecting portion 44a is formed in a circular thin plate shape. The outer diameter of the connection portion 44 a is set larger than the outer diameter of the heating element 43. The power supply lead 44b is formed in a plate shape extending linearly from the end of the connection portion 44a. The power supply lead 44b is electrically connected to the wiring of the connection board 70 shown in FIG. A protruding portion 44c is formed at the end of the connecting portion 44a.

The pressing member 45 is formed in an annular shape. The pressing member 45 is, for example, a wave washer.
The temperature sensor 46 includes a sensor main body 46a and a pair of lead wires 46b and 46c extending from the sensor main body 46a. The temperature sensor 46 (sensor body 46a) is, for example, a negative characteristic (NTC) thermistor. As shown in FIG. 7B, the lead wires 46b and 46c are electrically connected to the wiring of the connection substrate 70 by, for example, solder.

The heat conducting member 41, the electrode plate 42, the heating element 43, the electrode plate 44, and the pressing member 45 are arranged in this order in one extension part 32 (first extension part) and the other extension part 33 (second extension). Between the extended portions). Therefore, the pressing member 45 presses the heat conducting member 41, the electrode plate 42, the heating element 43, and the electrode plate 44 toward the first extending portion 32. The facing surface 32 a of the first extending portion 32 is a surface substantially parallel to the direction from the distal end portion 30 a of the treatment body 30 toward the case 10. Accordingly, the pressing member 45 presses each member such as the heating element 43 in a direction substantially perpendicular to the facing surface 32a, that is, in a direction substantially orthogonal to the direction from the distal end portion 30a of the treatment body 30 toward the case 10.

As shown in FIG. 11, the tip 31a of the accommodating portion 31 is formed in a semicircular shape in a side view. The distal end 31 a of the housing part 31 is formed larger than the shape of the heating element 43. As described above, the heating element 43 is formed in a circular plate shape. When viewed from the side, the tip 31 a of the housing portion 31 is formed in a semicircular shape having a radius larger than the radius of the heating element 43. In the second embodiment, the distal end 31a of the accommodating portion 31 is formed substantially the same as the radius of the connecting portions 42a and 44a of the electrode plates 42 and 44 described above. In the second embodiment, the side surface 43 c of the heating element 43 is separated from the inner side surface 30 b of the treatment body 30.

An engaging groove 31b that is concave toward the distal end 30a is formed at the distal end 31a of the accommodating portion 31. The protrusion 44c of the electrode plate 44 described above is inserted into the engagement groove 31b. The engaging groove 31b and the protruding portion 44c are engaged with each other in the outer peripheral direction of the connecting portions 42a and 44a of the electrode plate 44. By this engagement, the rotation of the electrode plate 44 is restricted with respect to the treatment body 30 in the accommodating portion 31, and the power supply lead 44b is positioned. In addition, although not shown in FIG. 11, the protrusion part 42c of the above-mentioned electrode plate 42 is similarly inserted in the engaging groove 31b. Then, the feeding lead 42b of the electrode plate 42 is positioned by the engagement between the protruding portion 42c and the engaging groove 31b.

As shown in FIG. 9, the treatment body 30 has a sensor housing portion 34 formed therein. In the second embodiment, the sensor housing portion 34 is formed on the opposite side of the extending portion 33 from the heating element 43 and the electrode plates 42 and 44. A sensor main body 46 a of the temperature sensor 46 is inserted into the sensor housing portion 34. As shown in FIG. 11, the sensor housing portion 34 is filled with, for example, gel-like silicon and the heat of the treatment body 30 is transmitted to the sensor body 46a. The lead wires 46 b and 46 c of the temperature sensor 46 are separated from the heating element 43 and the second electrode plate 44 by the second extending portion 33.

The connection member 60 has an insertion portion 63 that is inserted into the accommodation portion 31 of the treatment body 30.
As shown in FIG. 13, a protrusion 64 is formed at the distal end of the insertion portion 63 in the connection member 60. The protruding portion 64 is formed in a plate shape corresponding to the thickness of the heating element 43 accommodated in the accommodating portion 31. The thickness of the protrusion 64 is set to a value that is thinner than the heating element 43 and does not interfere with the electrode plates 42 and 44. The protruding portion 64 protrudes toward the heating element 43, and upper and lower end portions 64a and 64b extend toward the treatment body 30, and central portions of both end portions 64a and 64b are on the proximal end side (insertion portion 63 side). Curved in a concave shape. A surface (tip surface) 64c between the upper and lower end portions 64a and 64b is formed in an arc shape having a curvature (radius) corresponding to the side surface 43c of the heating element 43.

As shown in FIG. 12, the insertion portion 63 is formed with the insertion holes 61a and 61b described above. The power supply lead 42b is inserted into the insertion hole 61a. The power supply lead 44b is inserted into the insertion hole 61b. A groove portion 65 is formed in the insertion portion 63, and lead wires 46 b and 46 c are disposed in the groove portion 65. The lead wires 46 b and 46 c are separated from the power supply lead 44 b inserted into the insertion hole 61 b in the insertion portion 63 of the connection member 60. This prevents the second electrode plate 44 and the lead wires 46b, 46c of the temperature sensor 46 from being in electrical contact.

Next, the operation of the electric heater 100 will be described.
As shown in FIG. 10, the treatment body 30 has extending portions 32 and 33 that are located inside the accommodating portion 31 and extend from the distal end portion 30 a toward the case 10. The heat conducting member 41, the electrode plate 42, the heating element 43, the electrode plate 44, and the pressing member 45 are arranged in this order in one extension part 32 (first extension part) and the other extension part 33 (second extension). Between the extended portions).

The pressing member 45 presses the heat conducting member 41, the electrode plate 42, the heating element 43, and the electrode plate 44 toward the extending portion 32. Accordingly, the electrode plates 42 and 44 are in close contact with the electrodes formed on the two main surfaces 43a and 43b of the heating element 43. Thereby, the heating element 43 is energized through the electrode plates 42 and 44 and generates heat. Further, the pressing member 45 presses the heating element 43 toward the first extending portion 32. The heat of the heating element 43 is transmitted to the first extending portion 32 via the first electrode plate 42 and the heat conducting member 41. The extending portion 32 extends from the distal end portion 30 a of the treatment body 30 and is separated from the inner side surface 30 b of the treatment body 30. Therefore, heat is transmitted from the extending portion 32 to the tip portion 30a, and the tip portion 30a is heated. In addition, between the extension part 32 and the inner surface 30b of the treatment body 30, it may be a space | gap or a heat insulation member may be provided.

The heating element 43 has a plate shape. The extending portion 32 has a facing surface 32a that extends from the distal end portion 30a toward the case 10 and is substantially parallel to the extending direction. And the heat generating body 43 is pressed toward the opposing surface 32a of the extension part 32. FIG. The heating element 43 is disposed substantially parallel to the direction from the distal end portion 30 a of the treatment body 30 toward the case 10. That is, the side surface 43 c of the heating element 43 is disposed toward the distal end portion 30 a of the treatment body 30.

Therefore, the treatment body 30 can be narrowed in the thickness direction of the heating element 43. For this reason, in the pressing direction of the heating element 43, that is, in the thickness direction of the heating element 43, the outer shape (width) of the treatment body 30 is made thinner than the case where the main surface of the heating element 43 is arranged toward the tip. Can do. For this reason, the treatment body 30 can be tapered. In the tapered treatment body 30, the heating element 43 is disposed such that the side surface 43c faces the tip part 30a, so that the tip part is more than the case where the main surface of the heating element 43 is arranged toward the tip. Close to 30a.

Further, in the tapered treatment body 30, the distance from the distal end of the treatment body 30 to the heating body 43 is shorter than when the main surface of the heating body 43 is arranged toward the distal end. That is, the heat of the heating element 43 is transmitted to the distal end portion 30a of the treatment body 30 at a short distance. For this reason, the front-end | tip part 30a of the treatment body 30 can be heated efficiently.

As shown in FIG. 8, in the second embodiment, the pressing member 45 is a wave washer. For this reason, the pressing member 45 is in partial contact with the second electrode plate 44 in the circumferential direction of the second electrode plate 44. Therefore, the contact area between the pressing member 45 and the second electrode plate 44 is small, and heat transfer from the second electrode plate 44 to the pressing member 45 is small. For this reason, the heat of the heating element 43 is mainly transmitted to the first extending portion 32 that is in close contact with the pressing member 45.

In the second embodiment, the pressing member 45 that is a wave washer contacts the second electrode plate 44 at equal angular intervals in the circumferential direction of the second electrode plate 44. That is, the pressing member 45 applies an equal pressing force to the second electrode plate 44 in the circumferential direction of the second electrode plate 44. For this reason, the pressing of the second electrode plate 44 against the heating element 43 is uniform on the main surface of the heating element 43, and there is little bias in the circumferential direction. The same applies to the pressing of the heating element 43 against the first electrode plate 42.

As shown in FIG. 6, a connecting member 60 is attached to the end of the treatment body 30 on the case 10 side. The connecting member 60 is made of a heat insulating material. Therefore, the heat of the treatment body 30 is insulated by the connection member 60 and is not easily transmitted to the case 10. And if there is little heat transmitted from the treatment body 30 to the connection member 60, the temperature of the treatment body 30 can be changed suitably.

As described above, according to the second embodiment, the following effects can be obtained.
(2) In the illustrated example, the heating element 43 is a plate-like heating element that is disposed in the housing portion 31, and one main surface of the heating element 43 is disposed to face the facing surface 32 a, and the pressing member 45. Presses the heating element 43 against the extended portion 32.

The heating element 43 is disposed substantially parallel to the direction in which the treatment body 30 extends from the distal end portion 30 a toward the case 10. The heat of the heating element 43 is transmitted from the main surface of the heating element 43 to the distal end portion 30a of the treatment body 30 via the extending portion 32, and the distal end portion 30a of the treatment body 30 is heated. In the treatment section 20, the side surface 43 c of the heating element 43 is disposed so as to face the distal end portion 30 a of the treatment body 30. For this reason, compared with what arrange | positions the heat generating body 43 with the main surface 43a of the heat generating body 43 facing the front-end | tip part 30a of the treatment body 30, using the big heat generation body 43, the heat generation body 43 is used as the front-end | tip part of the treatment body 30. It can be arranged close to 30a. In addition, by using the large heating element 43, it is possible to ensure the amount of heat for heating the distal end portion 30 a of the treatment body 30. And the front-end | tip part 30a of the treatment body 30 can be made into a taper shape, and it can be made easy to apply a heat | fever suitably to desired parts, such as a crucible, by the taper front-end | tip part 30a.

(3) In the treatment body 30, a heat conducting member 41 is disposed between the heating element 43 and the extending part 32. Therefore, the heat of the heating element 43 is transmitted to the extending portion 32 via the heat conducting member 41, and the distal end portion 30a of the treatment body 30 can be heated in a short time. When the heat conducting member 41 is disposed between the first electrode plate 42 and the extending portion 32 and has flexibility as in the illustrated example, the heat conducting member 41 and the heat conducting member 41 are in heat conduction. The contact area between the member 41 and the contact area between the heat conducting member 41 and the extending part 32 are larger than those in the case where the first electrode plate 42 and the extending part 32 are in direct contact with each other. . For this reason, the heat of the heating element 43 is efficiently transmitted to the extending portion 32. Therefore, the heat of the heating element 43 can be efficiently transmitted to the distal end portion 30 a of the treatment body 30 through the extending portion 32.

(4) The first electrode plate 42 is disposed between the heating element 43 and the extending portion 32, and the second electrode plate 44 is disposed between the heating element 43 and the pressing member 45. The pressing member 45 presses the first electrode plate 42, the heating element 43, and the second electrode plate 44 toward the extending portion 32. As a result, the first electrode plate 42 and the second electrode plate 44 are in close contact with both main surfaces of the heating element 43, so that the first electrode plate 42 and the second electrode plate 44 are in contact with the heating element 43. Electrical connection is ensured. The heat conducting member 41 is disposed between the extending portion 32 and the first electrode plate 42. With this heat conducting member 41, the heat of the heating element 43 is efficiently transmitted to the distal end portion 30 a of the treatment body 30 through the first electrode plate 42, the heat conducting member 41, and the extending portion 32.

(5) The treatment body 30 includes a first extension portion 32 and a second extension portion 33 extending from the distal end portion 30a toward the case 10, and the first extension portion 32 and the second extension portion. The part 33 has facing surfaces 32a and 33a facing each other. The pressing member 45 is disposed between the second extending portion 33 and the second electrode plate 44. Accordingly, the heating element 43 and the pressing member 45 are disposed between the first extension portion 32 and the second extension portion 33. Then, the heating element 43 can be pressed toward the first extension part 32 by the pressing member 45 disposed between the heating element 43 and the second extension part 33.

(6) The temperature sensor 46 is disposed at the distal end portion 30a of the treatment body 30 with respect to the heating element 43 in a direction opposite to the pressing direction of the heating element 43. For this reason, the heat of the heating element 43 is not directly transmitted to the temperature sensor 46, and the temperature of the distal end portion 30a of the treatment body 30 can be measured.

(7) One end portion of the connection board made of a heat insulating material, having a wiring pattern that is attached to the end portion of the treatment body 30 on the case 10 side, closes the opening of the housing portion 31, and supplies power to the heating element 43 is The connecting member 60 is connected. The connecting member 60 is made of a heat insulating material. Therefore, the connection member 60 can suppress the heat of the treatment body 30 from being transmitted to the connection substrate connected to the case 10 and the heating element 43. And if there is little heat transmitted from the treatment body 30 to the connection member 60, the temperature of the treatment body 30 can be changed suitably.

(8) The pressing member 45 is, for example, a wave washer. For this reason, the contact area between the pressing member 45 and the electrode plate 44 is smaller than the contact area between the extending portion 32 and the electrode plate 42 (heat conducting member 41). For this reason, the heat transfer to the pressing member 45 can be suppressed, and the heat of the heating element 43 can be efficiently transmitted to the extending portion 32, and thus to the distal end portion 30 a of the treatment body 30.

(9) In the accommodating part 31 of the treatment body 30, between the extending parts 32 and 33, the heat conducting member 41, the electrode plate 42, the heating element 43, the electrode plate 44, and the pressing member 45 are arranged in a stacked state. ing. Therefore, the treatment body 30 can be easily assembled by inserting each member. Moreover, each member can be easily replaced.

In addition, you may implement each embodiment with the following aspects.
-In 2nd Embodiment, although it was set as the treatment body 30 which has a pair of extension part 32,33, in order to transmit the heat | fever of the heat generating body 43 to the front-end | tip part 30a of the treatment body 30, one extension part (1st It is good also as a treatment body which has only 1 extended part) 32. In this case, as the pressing member, for example, a clip-shaped member can be used as a configuration for pressing the heating element 43 against the extending portion 32.

Moreover, you may change the shape of an extension part suitably.
FIG. 14A schematically shows the distal end portion and the extension portion of the treatment body and the heating element. The extending portions 101 and 102 may have a shape that increases in thickness toward the distal end portion 30a. In other words, these extending portions 101 and 102 are such that the area of the cross section perpendicular to the direction (vertical direction in FIG. 10A) from the tip 30a toward the case 10 (see FIG. 10) is toward the tip 30a. To increase. Such extended portions 101 and 102 include a heating element 43 and the like (including the heat conducting member 41 and the pressing member 45 shown in FIG. 8) (in FIG. 14A, the heat conducting member and the pressing member). The volume (heat capacity) of the extending portions 101 and 102 can be reduced while ensuring the mechanical strength for holding the intermediate portion in between. For this reason, it is possible to efficiently transfer the heat of the heating element 43 to the tip portion 30a.

Note that, as shown in FIG. 14B, the side surfaces 103a and 104a of the extending portions 103 and 104 are formed in a curved shape so that the thickness increases toward the distal end portion 30a. The extending portions 103 and 104 formed in this way are extended while securing the mechanical strength for holding the heating element 43 and the like, similarly to the extending portions 101 and 102 shown in FIG. The volume (heat capacity) of the existing portions 103 and 104 can be reduced. For this reason, it is possible to efficiently transfer the heat of the heating element 43 to the tip portion 30a.

As shown in FIG. 15, it is good also as the extended part 110 of a rectangular ring (bottomed square tube shape). In addition, the member shown in a cylindrical shape in the figure schematically shows the accommodating portion 31 (see FIG. 10) in the treatment body. A heating element 43 and the like (including the heat conducting member 41 and the pressing member 45 shown in FIG. 8) are disposed inside the extending portion 110 and between the pair of side wall portions 111 and 112. The extending part 110 surrounds the heating element 43 and the like. In FIG. 15, the outer shape of the treatment body is schematically shown by a two-dot chain line.

As shown in FIG. 16, it is good also as a pair of extension part 121,122 formed in plate shape. These extending portions 121 and 122 are connected to the inner side surface 30b of the treatment body 30 shown in FIG. In FIG. 16, in order to make the extending portions 121 and 122 easy to understand, they are simply shown as rectangular plates. A heating element 43 and the like are disposed between the extending portions 121 and 122. In addition, the member shown in a cylindrical shape in the figure schematically shows the accommodating portion 31 (see FIG. 10) in the treatment body. In addition, in FIG. 17, the external shape of the treatment body is typically shown by a two-dot chain line.

The extension parts 131 and 132 shown in FIG. 17 are set to be shorter than the extension parts 121 and 122 shown in FIG. The heating element 43 and the like are disposed between the extending portions 131 and 132. In addition, the member shown in a cylindrical shape in the figure schematically shows the accommodating portion 31 (see FIG. 10) in the treatment body. In addition, in FIG. 17, the external shape of the treatment body is typically shown by a two-dot chain line.

In the second embodiment, the plate-like heating element 43 whose main surface is circular is used, but a heating element whose main surface is polygonal or elliptical may be used.
-In 2nd Embodiment, although the heat generating body 43 which has an electrode in a main surface was used, you may use the heat generating body which has an electrode in a side surface. When such a heating element is used, the heat conducting member 41 is disposed between the heating element and the extending portion 32. The contact resistance between the heat generating member 41 and the heat conducting member 41 and the contact area between the heat conducting member 41 and the extending portion 32 are directly reduced between the heat generating member and the extending portion 32 by the heat conducting member 41. It becomes larger compared to the case of contact. For this reason, the heat of the heating element can be efficiently transmitted to the extending portion 32.

In the second embodiment, the electrode plates 42 and 44 are laminated on the main surface of the heating element 43 so that the heating element 43 is energized. However, the heating element in which the energized lead wire is fixed to the heating element with solder or the like. May be used.

In the second embodiment, the pressing member 45 is a wave washer. The pressing member 45 only needs to be able to press the heating element 43 well against the extending portion 32, and the shape and the like may be changed as appropriate. The member used as the pressing member 45 preferably has a small contact area with the electrode plate 44.

-In each embodiment, you may change the position of the temperature sensor 46 suitably. For example, the temperature sensor 46 may be disposed on the heating element 43 side.
-In 2nd Embodiment, the heat insulation material which comprises the connection member 60 should just be a material whose heat conductivity is sufficiently low compared with the extension parts 32 and 33, and is not limited to the above-mentioned glass epoxy resin.

For treatment body in the embodiments described above, the density of the treatment body (kg ^{/ m} 3), the specific heat capacity of the treatment member (J / kg · K), the product of the thermal conductivity of the treatment member (W / m · K) is It is preferable that it is 2 × 10 ⁸ (J ² / m ⁴ · K ² · s) or less. That is, the thermal inertia of the treatment body is reduced, and the feeling of being too hot at the moment of touching is suppressed.

A place where the thermal inertia is small is easy to warm and cool. If the thermal inertia of the treatment body is small, even if the skin is suddenly touched at a high temperature, the skin is immediately cooled, so that it can be prevented from feeling too hot at the moment of touch. Therefore, it is desirable that the product of the density (kg / m ³ ) of the treatment body, the specific heat capacity (J / kg · K) of the treatment body, and the thermal conductivity (W / m · K) of the treatment body is small.

The value obtained by dividing the thermal conductivity (W / m · K) of the treatment body by the product of the density (kg / m ³ ), specific heat capacity (J / kg · K), and volume (m ³ ) of the treatment body is 1 It is preferable that it is (1 / m · s) or more. That is, the thermal resistance of the path from the temperature sensing portion of the temperature sensor 46 to the distal end portion 30a of the treatment body is reduced, and the temperature detected by the distal end portion 30a of the treatment body 30 and the temperature sensing portion of the temperature sensor 46 is reduced. Suppress divergence. The thermal resistance greatly depends on the shape of the treatment body. However, when the shapes are similar, in order to reduce the thermal resistance, it is preferable to increase the thermal conductivity and decrease the heat capacity. Thus, the thermal conductivity of (W / m · K), the density of the contact portion (kg ^{/ m} 3), the specific heat capacity (J / kg · K), is greater the value obtained by dividing the product of volume ^{(m 3)} desirable.

One or both of the main surfaces 43a and 43b of the heat generating body 43 may be referred to as heat generating surfaces, and one or both of the extending portions 32 and 33 may be referred to as heat receiving portions. One or both of 32a and 33a may be called a heat receiving surface. The heat generating surface and the heat receiving surface may be flat surfaces, but may be curved surfaces.

The heating element 43 can be attached to the holding position between the extension parts 32 and 33 by making a slidable contact with one or both of the extension parts 32 and 33. The heating element 43 and one or both of the extending portions 32 and 33 may be configured to be in surface contact.

Case 10 may be referred to as a handheld case. The distal end portion 30a of the treatment body 30 may be referred to as a skin contact portion configured to be in contact with the user's skin and locally heat the user's skin.

The present disclosure includes the following configuration examples.
[Configuration Example 1] In an electric water heater (100) including a handheld case (10) and a treatment portion (20) coupled to the handheld case (10), the treatment portion (20) is in contact with the user's skin. And a heating element (43) including an outer surface including a skin contact portion (30a) configured to locally heat the user's skin, an inner surface (30b), and at least one heating surface (43a). And at least one heat receiving surface (32a) thermally coupled to the at least one heat generating surface,
The heat receiving surface (32a) and the heat receiving surface (32a) and the heat receiving surface (32a) from the heat generating body (43) through the heat generating surface are intensively transferred to the skin contact portion (30a). An electric water heater (100) comprising a heat transfer direction control structure (23a, 23b, 32, 33) provided between the outer surface of the treatment section (20).
[Configuration Example 2] The heat transfer direction control structure includes a gap (23a, 23b) formed between the heat receiving surface and the inner surface (30b) of the treatment portion (20). The electric water heater (100) described.
[Configuration Example 3] The heat transfer direction control structure includes a heat insulating member disposed in a gap (23a, 23b) formed between the heat receiving surface and the inner side surface (30b) of the treatment portion (20). The electric heater (100) according to Configuration Example 1 including the heat insulating member having a thermal conductivity lower than that of the heat receiving portion (32, 33) constituting the heat receiving surface.
[Configuration Example 4] When the at least one heat generating surface (43a) is slidably contacted with the at least one heat receiving surface (32a), the heat generating body (43) is attached to the treatment portion (20). The electric water heater (100) described in Configuration Example 1.
[Configuration Example 5] The treatment portion (20) includes two heat receiving surfaces (32a, 33a), and the heating element (43) is formed between the two heat receiving surfaces (32a, 33a). The electric water heater of the structural example 1 accommodated in (31).

DESCRIPTION OF SYMBOLS 10 ... Case, 20 ... Treatment part, 30 ... Treatment body, 30a ... Tip part, 31 ... Storage part, 32 ... Extension part (1st extension part), 32a ... Opposite surface, 33 ... Extension part (1st 2), 41 ... heat conducting member, 42 ... electrode plate (first electrode plate), 43 ... heating element, 43a ... main surface, 44 ... electrode plate (second electrode plate), 45 ... pressing. Member, 46 ... Temperature sensor, 60 ... Connection member, 63 ... Insertion part, 64 ... Projection part.

Claims (9)

1. Case and
   A treatment part attached to the case;
   The treatment section is
   A treatment body having a distal end portion, an inner side surface, and an extending portion that is recessed toward the distal end portion and opens to the case side, forms an accommodating portion inside, and is spaced apart from the inner side surface; ,
   A heating element disposed in the housing portion;
   Including electric water heater.
2. The heating element is a plate-like heating element that includes one main surface that is disposed in the housing portion and is opposed to the surface of the extending portion.
   The electric heater according to claim 1, wherein the electric heater includes a pressing member that presses the heating element against the surface of the extending portion in a direction intersecting with the direction from the tip portion toward the case. vessel.
3. The treatment section is
   A first electrode plate disposed between the heating element and the extending portion;
   A second electrode plate disposed between the heating element and the pressing member;
   The electric water heater of Claim 2 containing this.
4. The extension portion is a first extension portion,
   A second extending portion extending from the tip portion toward the case and having a facing surface facing the surface of the first extending portion;
   The pressing member is disposed between the second extending portion and the second electrode plate.
   The electric water heater according to claim 3.
5. The treatment portion has a heat conduction member disposed between the extension portion and the heating element.
   The electric water heater according to any one of claims 1 to 4.
6. The treatment portion has a heat conduction member having flexibility and disposed between the extension portion and the first electrode plate.
   The electric water heater according to claim 3 or 4.
7. The electric heater according to claim 6, wherein a contact area between the pressing member and the second electrode plate is smaller than a contact area between the extending portion and the heat conducting member.
8. A connection board having a wiring pattern for supplying power to the heating element;
   A connection member made of a heat insulating material, attached to the case side end of the treatment body and closing the opening of the accommodating portion, and connected to one end of the connection board;
   The electric water heater according to any one of claims 1 to 7, comprising:
9. The electric heater according to claim 8, wherein the connecting member is inserted into the accommodating portion of the treatment body and has an insertion portion whose tip surface is curved along the side surface of the heating element.

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