JP7170241B2 - TOILET SEAT MANUFACTURING METHOD AND HEATER - Google Patents

Description

The present disclosure relates to a toilet seat manufacturing method and a heater.

Patent Literature 1 discloses a heated toilet seat device. In this heated toilet seat device, a planar heater is attached to the concave surface of the upper member of the toilet seat body. In this planar heater, both ends of a horseshoe-shaped portion are flexibly connected via V-shaped bridge portions.

JP 2010-82185 A

By the way, in the planar heater described above, the deformation of the V-shaped bridge portion changes the positional relationship between both ends of the horseshoe-shaped portion before being attached to the upper member, so that the shape is difficult to stabilize. Therefore, it is not easy to align the planar heater with the upper member, and it is not easy to attach the planar heater to the upper member.

The present disclosure has been made in view of the above reasons, and aims to provide a method for manufacturing a toilet seat that allows a heater to be easily attached to the seat, and a heater that can be easily attached to the seat of the toilet seat. do.

A manufacturing method of a toilet seat according to one aspect of the present disclosure includes an attaching step. The sticking step is a step of sticking an annular sheet-shaped heater to the inner surface of the seat portion of the toilet seat. In the affixing step, a portion of the heater in the circumferential direction is cut by force applied to the heater when the heater is affixed to the inner surface.

A heater according to one aspect of the present disclosure includes a sheet-like portion and a heating element. The sheet-like portion is formed in a ring shape and adhered to the inner surface of the seat portion of the toilet seat. The heating element is fixed to the sheet-like portion. The sheet-like portion has a cutting portion. The cut portion constitutes a part of the sheet-like portion in the circumferential direction, and is more likely to be cut than the other portion of the sheet-like portion.

The method for manufacturing a toilet seat according to the aspect described above allows the heater to be easily attached to the seat. Moreover, the heater according to the aspect can be easily attached to the seat portion of the toilet seat.

1 is a perspective view of a toilet seat in one embodiment; FIG. FIG. 2 is a cross-sectional view taken along line X1-X1 of FIG. FIG. 3 is a perspective view of the seat portion and the heater of the same toilet seat as viewed from the back side of the seat portion. FIG. 4 is an exploded perspective view showing the seat portion and the heater of the same toilet seat. FIG. 5 is a plan view of the front end portion of the same heater. 6A to 6D are cross-sectional views sequentially showing steps of attaching a heater to the seat portion of the same toilet seat. FIG. 7A is an enlarged view of the X2 portion of FIG. 6A. FIG. 7B is an enlarged view of the X3 portion of FIG. 6B.

(1) Outline The embodiments described below relate to a method for manufacturing a toilet seat and a heater, and more particularly to a method for manufacturing a toilet seat in which a heater is attached to the inner surface of the seat portion and a heater used in this manufacturing method.

FIG. 1 shows a toilet seat 1 manufactured by the manufacturing method of this embodiment. The manufacturing method of the toilet seat 1 of this embodiment includes the sticking steps shown in FIGS. 6A to 6D. The attaching step is a step of attaching the ring-shaped sheet-like heater 5 to the inner surface 30 of the seat portion 3 of the toilet seat 1 . In the attaching step, a portion of the heater 5 in the circumferential direction is cut by force applied to the heater 5 when the heater 5 is attached to the inner surface 30 of the seat portion 3 . Here, the seat portion 3 referred to in the present disclosure is a portion of the toilet seat 1 on which a user sits.

In the present embodiment, a portion of the annular heater 5 in the circumferential direction is cut in the attaching step. Therefore, the heater 5 can be easily deformed along the inner surface 30 of the seat portion 3, and the heater 5 can be firmly adhered to the inner surface 30 of the seat portion 3 while being in close contact therewith. Also, the heater 5 before cutting can be made difficult to deform. Therefore, the sheet-like heater 5 can be easily aligned with the seat portion 3 .

(2) Details The toilet seat 1 of this embodiment shown in FIG. The heated toilet seat device 10 includes, for example, a device main body 11 installed on a toilet bowl, a toilet seat 1 rotatably connected to the device main body 11 , and a toilet lid 12 rotatably connected to the device main body 11 . Hereinafter, the toilet seat 1 will be described using the orientation in which the heated toilet seat device 10 is installed on the toilet and the toilet seat 1 is placed on the toilet. Specifically, the toilet seat 1 will be described using the directions shown in FIG.

The toilet seat 1 includes a toilet seat body 2 constituting the main body of the toilet seat 1 and a heater 5 incorporated in the toilet seat body 2. - 特許庁The toilet seat body 2 is formed in an annular shape when viewed from above. The toilet seat body 2 of this embodiment has a pair of connecting portions 20 . A pair of connecting portions 20 are formed on both left and right sides of the rear end of the toilet seat body 2, respectively. Each of the pair of connecting portions 20 is connected to the device main body 11 so as to be rotatable around a rotation shaft extending in the left-right direction.

The toilet seat body 2 of this embodiment is divided into upper and lower parts, and as shown in FIG. 2, has a seat part 3 constituting an upper half and a bottom part 4 constituting a lower half. The seat portion 3 is formed in an annular shape when viewed from above. The seat portion 3 of the present embodiment has a U-shaped cross section perpendicular to the circumferential direction of the seat portion 3 that opens downward. Specifically, the seat portion 3 has a ceiling portion 31 , an inner peripheral portion 32 and an outer peripheral portion 33 . The seat portion 3 of this embodiment is made of synthetic resin, and the ceiling portion 31, the inner peripheral portion 32, and the outer peripheral portion 33 are integrally formed.

The ceiling portion 31 is formed in an annular shape when viewed from above. An outer surface (upper surface) of the ceiling portion 31 is a seating surface that contacts the hips of a user sitting on the toilet seat 1 . The inner peripheral portion 32 extends downward from the inner peripheral edge portion of the ceiling portion 31 and is formed along the entire length of the ceiling portion 31 in the circumferential direction. The outer peripheral portion 33 extends downward from the outer peripheral edge of the ceiling portion 31 and is formed over the entire length of the ceiling portion 31 in the circumferential direction. The inner surface 30 of the seat portion 3 is a continuous curved surface and is composed of the inner surface of the ceiling portion 31 , the inner surface of the inner peripheral portion 32 and the inner surface of the outer peripheral portion 33 .

The seat portion 3 is formed with a recess 34 opening downward over the entire length of the seat portion 3 in the circumferential direction. The recess 34 is formed by the inner surface 30 of the seat portion 3 , that is, the inner surface of the ceiling portion 31 , the inner surface of the inner peripheral portion 32 and the inner surface of the outer peripheral portion 33 .

As shown in FIG. 3, the seat portion 3 of the present embodiment has a width b1 (see FIG. 2) in a cross section perpendicular to the circumferential direction of the seat portion 3, which extends from the middle portion of the seat portion 3 in the front-rear direction to the front end of the seat portion 3. The part closer to the part is gradually smaller.

As shown in FIG. 2 , a sheet-like heater 5 is attached to the inner surface 30 (recess 34 ) of the seat portion 3 . The heater 5 of this embodiment is an aluminum foil heater. As shown in FIG. 3, the heater 5 has a sheet-like portion 6 formed in a C shape when viewed from above, and a heating element 7 fixed to the sheet-like portion 6 .

The sheet-like portion 6 is attached to the seat portion 3 over the entire length in the circumferential direction of the seat portion 3 excluding the portion corresponding to the front end portion of the seat portion 3 . The sheet-like portion 6 of the present embodiment is a heat transfer sheet that transfers heat generated by the heat generating element 7 to the seat portion 3, and is a pair of heat transfer layers 61 that are stacked and bonded to each other with the heat generating element 7 interposed therebetween. (see FIG. 7B). Each of the pair of heat transfer layers 61 extends over the entire circumferential length of the sheet-like portion 6 . Each heat transfer layer 61 of this embodiment is an aluminum foil.

The heating element 7 of this embodiment is a cord heater. The heating element 7 has a heating wire 70 (see FIG. 7B) and an insulating material 71 covering the heating wire 70 (see FIG. 7B). The heating element 7 is sandwiched and fixed between the pair of heat transfer layers 61 .

As shown in FIG. 3 , the sheet-like portion 6 of this embodiment has a heating element placement portion 63 and a cutting portion 64 . The heating element placement portion 63 is formed in a C shape when viewed from above, and constitutes most of the sheet-like portion 6 . The cut portion 64 is a portion cut in the manufacturing method of the toilet seat 1, which will be described later. As shown in FIG. 4 , in the heater 5 before the cut portion 64 is cut, both ends in the circumferential direction of the heating element placement portion 63 are connected by the cut portion 64 .

The heating element 7 is provided only in the heating element arrangement portion 63 as shown in FIG. 3 and is not provided in the cutting portion 64 . That is, the cut portion 64 is a portion of the heater 5 where the heating element 7 does not exist.

As shown in FIG. 2 , the heater 5 is attached to the inner surface 30 of the seat portion 3 with one surface of the sheet-like portion 6 in the thickness direction along the inner surface 30 of the seat portion 3 . In this embodiment, one of the pair of heat transfer layers 61 is attached to the inner surface 30 of the seat 3 via an adhesive layer 82 (see FIG. 7B). Also, the sheet-like portion 6 of the present embodiment is attached to the inner surface 30 of the seat portion 3 so as to extend over the ceiling portion 31 , the inner peripheral portion 32 and the outer peripheral portion 33 .

A bottom portion 4 of the toilet seat body 2 is formed in an annular shape when viewed from above. The bottom portion 4 of this embodiment is made of synthetic resin and is separate from the seat portion 3 . The bottom part 4 is attached to the lower end of the seat part 3 . The inner peripheral edge portion of the bottom portion 4 is joined to the lower end portion of the inner peripheral portion 32 of the seat portion 3 , and the outer peripheral edge portion of the bottom portion 4 is joined to the lower end portion of the outer peripheral portion 33 of the seat portion 3 . The bottom portion 4 covers the recess 34 of the seat portion 3 and the heater 5 arranged in the recess 34 from below.

The manufacturing method of the toilet seat 1 of this embodiment includes a sticking step and a joining step. The attaching step is a step of attaching the heater 5 to the inner surface 30 of the seat portion 3 . The joining step is a step of joining the bottom portion 4 to the seat portion 3, which is performed after the attaching step.

As shown in FIG. 4 , in the heater 5 before the sticking process, the cut portion 64 is not cut, and both circumferential ends of the heating element arrangement portion 63 are connected by the cut portion 64 . Hereinafter, the heater 5 before cutting is referred to as pre-cutting heater 5, and the heater 5 after cutting is referred to as post-cutting heater 5, as required.

Each heat transfer layer 61 (see FIG. 7B) of the sheet-like portion 6 of the pre-cutting heater 5 is formed in an annular shape. A cut portion 64 forming a part of the sheet-like portion 6 of the pre-cut heater 5 in the circumferential direction is a portion that is more likely to be cut than the heating element arrangement portion 63 .

In this embodiment, the width b2 (see FIG. 5) of the cut portion 64 of the pre-cutting heater 5 is smaller than the width of the portion of the sheet-like portion 6 other than the cut portion 64 . As a result, the cut portion 64 of the pre-cutting heater 5 is cut more easily than the heating element arrangement portion 63 .

As shown in FIG. 5, the cutting portion 64 of the pre-cutting heater 5 of the present embodiment has an arcuate front edge recessed backward and a rear edge recessed forward arcuate. As a result, the width b2 of the cut portion 64 of the pre-cutting heater 5 gradually decreases from both ends to the intermediate portion in the circumferential direction of the sheet-like portion 6 of the cut portion 64 .

In the cutting portion 64 of this embodiment, a perforation 65 is formed in the intermediate portion (the portion where the width b2 is the smallest) in the circumferential direction of the sheet-like portion 6 . The perforations 65 of the present embodiment are composed of a plurality of holes arranged in the width direction of the cut portion 64 (the direction orthogonal to the circumferential direction of the sheet-like portion 6).

In the attaching step of the present embodiment, the heater 5 is attached to the inner surface 30 of the seat portion 3 using an attaching device 90, as shown in FIGS. 6A to 6D. The sticking device 90 has two molds, a first mold 91 (lower mold) and a second mold 92 (upper mold) arranged above the first mold 91 . The first mold 91 has a mounting surface 93 on which the pre-cutting heater 5 is mounted. The mounting surface 93 is the upper surface of the first mold 91 and is a curved surface along the inner surface 30 of the seat portion 3 . The second die 92 has a pressing surface 94 along the outer surface of the seat portion 3 . The pressing surface 94 is the lower surface of the second die 92 and is a curved surface along the outer surface of the seat portion 3 . The second mold 92 is driven vertically by, for example, a driving unit provided in the sticking device 90 .

In this embodiment, the adhesive layer 82 is formed on one surface of the sheet-like portion 6 of the pre-cutting heater 5 before the sticking process. The adhesive layer 82 is formed by attaching a double-sided tape 8 to one surface of the sheet-like portion 6 of the pre-cutting heater 5, as shown in FIG. 7A. The double-sided tape 8 comprises a substrate 81, two adhesive layers 80 and 82 formed on both sides of the substrate 81, respectively, and a release sheet formed on the surface of one adhesive layer 82 opposite to the substrate 81. 83. The adhesive layer 80 formed on the side of the substrate 81 opposite to the release sheet 83 side of the double-sided tape 8 is in contact with one surface of the sheet-like portion 6 of the pre-cutting heater 5 , and is attached to the pre-cutting heater 5 . Attached.

In the attaching step, the pre-cut heater 5 to which the double-sided tape 8 is attached is placed on the mounting surface 93 of the first die 91 as shown in FIG. 6A. Note that the illustration of the double-sided tape 8 is omitted in FIGS. 6A to 6D. Next, the release sheet 83 of the double-sided tape 8 attached to the pre-cutting heater 5 is peeled off from the adhesive layer 82 (see FIG. 7A). As a result, the adhesive layer 82 is exposed on the side of the pre-cutting heater 5 opposite to the first die 91 .

Next, as shown in FIGS. 6B and 6C, the seat portion 3 is placed on the pre-cutting heater 5 via the adhesive layer 82 so that the sheet-like portion 6 of the pre-cutting heater 5 is along the inner surface 30 of the seat portion 3. . When the seat portion 3 is placed on the pre-cutting heater 5 in this manner, the pre-cutting heater 5 is sandwiched between the first die 91 and the seat portion 3 and bends (deforms) along the inner surface 30 of the seat portion 3 . At this time, the cutting portion 64 is cut along the perforations 65 (see FIG. 5) by force applied from the first die 91 and the seat portion 3 . As a result, the pre-cutting heater 5 becomes the post-cutting heater 5 by cutting the cut portion 64 , which is a part of the circumferential direction.

Next, as shown in FIGS. 6C and 6D, the second die 92 is moved downward, and the post-cutting heater 5 and the seat are placed between the mounting surface 93 of the first die 91 and the pressing surface 94 of the second die 92 . The portion 3 is sandwiched and compressed. As a result, the sheet-like portion 6 of the heater 5 after being cut is attached in close contact with the inner surface 30 of the seat portion 3 via the adhesive layer 82 (see FIG. 7B). In this embodiment, the cut portion 64 is attached to the inner surface 30 of the seat portion 3 , but may not be attached to the inner surface 30 of the seat portion 3 . That is, in this case, only the heating element placement portion 63 of the heating element placement portion 63 and the cut portion 64 is attached to the inner surface 30 of the seat portion 3 .

As described above, when the heater 5 of the present embodiment is attached to the inner surface 30 of the seat portion 3, the cut portion 64 (see FIG. 5), which is a part of the circumferential direction, is cut. Easy to deform along Therefore, the heater 5 is firmly adhered to the inner surface 30 of the seat portion 3 in close contact therewith. Further, the pre-cutting heater 5 does not need to be formed with a portion that allows deformation of the heater 5, unlike the bridge portion disclosed in Patent Document 1. For this reason, the heater 5 before being attached to the seat portion 3 can be made into a shape that is difficult to deform, so that the sheet-like heater 5 can be easily aligned with the seat portion 3 .

The joining step of the present embodiment is a step of joining the bottom portion 4 to the seat portion 3 by welding the bottom portion 4 to the seat portion 3 to which the heater 5 is attached by the attaching step. Specifically, in the joining step, the inner peripheral edge of the bottom portion 4 is welded to the lower end of the inner peripheral portion 32 of the seat portion 3, and the outer peripheral edge of the bottom portion 4 is welded to the lower end of the outer peripheral portion 33 of the seat portion 3. , whereby the bottom part 4 is attached to the seat part 3 .

(3) Modification The toilet seat 1 and the manufacturing method of the toilet seat 1 of the above-described embodiment can be changed as appropriate. For example, at one or both of the inner peripheral edge and the outer peripheral edge of the sheet-like portion 6 (the heating element placement portion 63 and the cutting portion 64), the sheet-like portion 6 easily deforms following the inner surface 30 of the seat portion 3. A notch or the like may be formed for this purpose. Further, the sheet-like portion 6 may be composed only of the pair of heat transfer layers 61 or may have layers other than the pair of heat transfer layers 61 . Other layers include, for example, a film laminated on the surface of each heat transfer layer 61 . Alternatively, the heater 5 may be a heater in which the sheet-like portion 6 has only one layer of the heat transfer layer 61 and the heating element 7 is attached to this heat transfer layer. Moreover, the heater 5 is not limited to an aluminum foil heater, and may be, for example, a heater in which each heat transfer layer 61 is made of resin film, nonwoven fabric, glass cloth, or the like.

Also, the double-sided tape 8 may not be attached to the pre-cutting heater 5 . In this case, for example, as the pre-cutting heater 5, a heater having an adhesive layer formed on one surface of the sheet-like portion 6 and a release sheet formed on the surface of the adhesive layer opposite to the sheet-like portion 6 is used. It should be used. Alternatively, the pre-cutting heater 5 may be attached to the inner surface 30 of the seat portion 3 via an adhesive instead of the adhesive layer 82, for example. In this case, for example, the adhesive is applied to one surface of the sheet-like portion 6 of the pre-cutting heater 5 placed on the first mold 91, and then the seat portion 3 is placed on the pre-cutting heater 5 via the adhesive. be done.

Moreover, the width b<b>2 of the cut portion 64 may be smaller than the width of the portion of the sheet-like portion 6 other than the cut portion 64 at least a portion of the cut portion 64 in the circumferential direction of the sheet-like portion 6 . For example, the width b2 of the cut portion 64 may be constant over the entire circumferential direction of the sheet-like portion 6 of the cut portion 64 and may be smaller than the width of the portion of the sheet-like portion 6 other than the cut portion 64 . Also, the width b2 of the cut portion 64 may be the same as the width of the portion of the sheet-like portion 6 other than the cut portion 64 . Also, the perforations 65 may not be formed in the cut portion 64 . Also, the cut portion 64 may be a portion other than the front end portion of the heater 5 .

In addition, the configuration in which the cut portion 64 of the heater 5 is easier to cut than the other portions is not limited to the configuration of the above-described embodiment. For example, by configuring only the cut portion 64 of the sheet-like portion 6 with a single heat transfer layer 61 to make the cut portion 64 thinner than the other portions, or by applying a chemical only to the cut portion 64, , the cutting portion 64 may be easily cut.

Further, in the above embodiment, the cut portion 64 is cut when the seat portion 3 is placed on the pre-cutting heater 5 . However, the cutting part 64 joins the pre-cutting heater 5 from the first die 91 and the second die 92 when the pre-cutting heater 5 and the seat part 3 are sandwiched between the first die 91 and the second die 92. May be cut by force.

Also, the heater 5 may not have the cutting portion 64 . In this case, for example, a protrusion is provided on the inner surface 30 of the seat portion 3, and when the seat portion 3 is placed on the heater 5, the protrusion hits the pre-cutting heater 5, thereby partially cutting the heater 5 in the circumferential direction. good too. Further, a protrusion is provided on the pressing surface 94 of the second die 92, and when the heater 5 and the seat portion 3 are sandwiched between the first die 91 and the second die 92 after cutting, the protrusion hits the heater 5, A portion of the heater 5 in the circumferential direction may be cut.

Alternatively, the heater 5 may be attached to the seat portion 3 manually, for example. That is, in this case, the heater 5 is cut by the force exerted on the heater 5 when the heater 5 is manually attached to the inner surface 30 of the seat 3 .

The bottom 4 may also be attached to the seat 3 using other means such as adhesive. The heating toilet seat device 10 has a heating function for warming the toilet seat 1, a washing function for washing the user's private parts, a drying function for drying the private parts after washing, a deodorizing function for removing odors, and the like. Alternatively, the device may have only the heating function among these functions.

(4) Aspects As is clear from the embodiment and modifications described above, the method for manufacturing the toilet seat (1) of the first aspect has the following configuration. The manufacturing method of the toilet seat (1) comprises a sticking step. The attaching step is a step of attaching a ring-shaped sheet-like heater (5) to the inner surface (30) of the seat portion (3) of the toilet seat (1). In the attaching step, the force applied to the heater (5) when the heater (5) is attached to the inner surface (30) of the seat (3) cuts a portion of the heater (5) in the circumferential direction.

According to this aspect, in the attaching step, a portion of the annular heater (5) in the circumferential direction is cut. Therefore, the heater (5) is easily deformed along the inner surface (30) of the seat (3), and the heater (5) is firmly adhered to the inner surface (30) of the seat (3). can be attached. In addition, the heater (5) before cutting can be made difficult to deform, so that the sheet-like heater (5) can be easily aligned with the seat (3). In addition, when the heater (5) is taken out of a shipping box or the like and placed at a predetermined position, the heater (5) is prevented from being widely opened to the left and right, causing the heater (5) itself to be wrinkled or torn. Also, the heater (5) can be easily cut off by using the force when the heater (5) is attached to the seat (3). Therefore, the heater (5) can be easily attached to the seat (3).

Also, the method for manufacturing the toilet seat (1) of the second mode can be realized by combining with the first mode. The heater (5) of the second aspect has a cutting portion (64). The cut portion (64) is a portion of the heater (5) in the circumferential direction and is easier to cut than the other portions of the heater (5). A cut portion (64) is cut during the application process.

According to this aspect, a part of the heater (5) in the circumferential direction can be easily cut by using the cutting portion (64).

Moreover, the method for manufacturing the toilet seat (1) of the third aspect can be realized by combining with the second aspect. Perforations (65) are formed in the cut portion (64) of the third aspect.

According to this aspect, the perforations (65) can be used to easily cut a portion of the heater (5) in the circumferential direction.

Also, the method for manufacturing the toilet seat (1) of the fourth aspect can be realized by combining with the second or third aspect. The cut portion (64) of the fourth aspect has at least a partial width (b2) in the circumferential direction of the heater (5) smaller than the width of the portion of the heater (5) other than the cut portion (64).

According to this aspect, by reducing the width (b2) of at least a portion of the cut portion (64), a portion of the heater (5) in the circumferential direction can be easily cut.

Moreover, the heater (5) of the fifth aspect includes a sheet-like portion (6) and a heating element (7). The sheet-like part (6) is formed in an annular shape and is attached to the inner surface (30) of the seat part (3) of the toilet seat (1). A heating element (7) is fixed to the sheet-like part (6). The sheet-like part (6) has a cutting part (64). The cut part (64) constitutes a part of the sheet-like part (6) in the circumferential direction and is easier to cut than the other parts of the sheet-like part (6).

According to this aspect, the heater (5) can be cut at the cutting portion (64) by the force applied to the heater (5) when the heater (5) is attached to the inner surface (30) of the seat portion (3). . Therefore, the heater (5) is easily deformed along the inner surface (30) of the seat (3), and the heater (5) is firmly adhered to the inner surface (30) of the seat (3). can be attached. In addition, the heater (5) before being cut can be made difficult to deform, so that the sheet-like portion (6) can be easily aligned with the seat portion (3).

b2 width 1 toilet seat 3 seat portion 30 inner surface 5 heater 6 sheet-like portion 64 cutting portion 65 perforation 7 heating element

Claims (6)

An attaching step of attaching an annular sheet-shaped heater to the inner surface of the seat portion of the toilet seat, wherein in the attaching step, the heater is heated by a force applied to the heater when the heater is attached to the inner surface. Cutting a part in the circumferential direction,
A method of manufacturing a toilet seat. The heater is
Having a cutting portion that is a part of the heater in the circumferential direction and is easier to cut than the other part of the heater,
The cut portion is cut in the pasting step,
A method for manufacturing the toilet seat according to claim 1. A perforation is formed in the cutting part,
The manufacturing method of the toilet seat according to claim 2. The width of at least a portion of the cut portion in the circumferential direction of the heater is smaller than the width of a portion of the heater other than the cut portion.
A method for manufacturing a toilet seat according to claim 2 or 3. a sheet-like portion formed in a ring shape and attached to the inner surface of the seat portion of the toilet seat;
A heating element fixed to the sheet-like portion,
The sheet-like portion is
Having a cutting part that constitutes a part of the sheet-like part in the circumferential direction and is easier to cut than the other part of the sheet-like part,
The width of the cut portion gradually decreases from both ends to the intermediate portion in the circumferential direction of the sheet-like portion of the cut portion.
heater . In the cutting portion, a perforation is formed in an intermediate portion in the circumferential direction of the sheet-like portion,
A heater according to claim 5.

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