WO2018179303A1 - Heating structure and treatment tool - Google Patents

Abstract

A heating structure 11 is provided with: a resistance pattern 16 that generates heat when electric current is carried thereto; a heat transfer plate 12, which has an outer surface 121, and an inner surface 122 on the reverse side of the outer surface 121, and to which heat from the resistance pattern 16 is transmitted; an adhesive member 14, which is disposed between the resistance pattern 16 and the inner surface 122, and which adheres and fixes the resistance pattern 16 and the heat transfer plate 12 to each other. The outer surface 121 is provided with a protruding strip section 1213 extending in the longitudinal direction. The inner surface 122 is provided with a recessed strip section 1223 extending in the longitudinal direction, said recessed strip section being at a position on the reverse side of the protruding strip section 1213. At least a part of the resistance pattern 16 is positioned in the recessed stripe section 1223.

Description

Heat generating structure and treatment tool

The present invention relates to a heat generating structure and a treatment tool.

2. Description of the Related Art Conventionally, there has been known a treatment instrument that is provided with a heat generating structure that applies thermal energy to a living tissue, and that treats the living tissue (joining (or anastomosis), cutting, etc.) by applying the heat energy (for example, a patent) Reference 1).
The heat generating structure (electrode part) described in Patent Document 1 includes a heater (electrothermal conversion element), a heat transfer plate (high-frequency electrode), and an adhesive member (high heat conductive heat-resistant adhesive sheet) described below.
The heater is a sheet heater in which a resistance pattern (electric resistance pattern) that generates heat when energized is formed on one surface of a substrate.
The heat transfer plate is made of a conductive material such as copper. The heat transfer plate is disposed to face one surface (resistance pattern) of the substrate constituting the heater, and transfers heat from the resistance pattern to the living tissue (giving thermal energy to the living tissue).
The adhesive member is a sheet having good thermal conductivity and electrical insulation. The adhesive member is interposed between the heater and the heat transfer plate, and bonds and fixes them.

JP 2014-124491 A

By the way, when separating a living tissue, for example, in a heat transfer plate, it is advantageous to provide a protrusion on the outer surface in contact with the living tissue because it becomes sharper to the living tissue. There is. However, such a configuration causes the following problems.
FIG. 14 is a diagram illustrating a problem in the conventional heat generating structure 11 ′. Specifically, FIG. 14 is a cross-sectional view of the heat generating structure 11 ′.
In FIG. 14, reference numeral “12 ′” denotes the above-described heat transfer plate. Reference numeral “121 ′” denotes the outer surface of the heat transfer plate described above. Reference numeral “1213 ′” is the above-described protrusion. Reference numeral “122 ′” denotes an inner surface which forms the front and back surfaces of the heat transfer plate described above. Reference numeral “13 ′” denotes the heater described above. Reference numeral “15 ′” denotes the substrate described above. Reference numeral “151 ′” is one surface of the substrate described above. Reference numeral “16 ′” is the above-described resistance pattern. Reference numeral “14 ′” denotes the adhesive member described above.

When the protrusion 1212 ′ having a triangular cross section is provided on the outer surface 121 ′ of the heat transfer plate 12 ′ (FIG. 14), the living tissue comes into contact with the vertex of the protrusion 1213 ′, and the vertex And so forth by applying thermal energy from. However, the distance from the resistance pattern 16 ′ to the apex portion of the ridge 1213 ′ is increased by the provision of the ridge 1213 ′. For this reason, there is a problem that the temperature rise time of the apex portion is delayed and the treatment time of the living tissue is accordingly increased.

The present invention has been made in view of the above, and an object of the present invention is to provide a heat generating structure and a treatment tool that can shorten the treatment time of a living tissue.

In order to solve the above-described problems and achieve the object, a heat generating structure according to the present invention has a resistance pattern that generates heat by energization, an outer surface, and an inner surface that forms the front and back surfaces of the outer surface, A heat transfer plate to which heat from the resistance pattern is transmitted, and an adhesive member interposed between the resistance pattern and the inner surface, and adhesively fixing the resistance pattern and the heat transfer plate. The surface is provided with a ridge that extends along the first direction, and the inner surface has a ridge that extends along the first direction at a position facing the ridge. Is provided, and at least a part of the resistance pattern is located in the recess.

Moreover, the treatment tool according to the present invention includes the heat generating structure described above.

According to the heat generating structure and the treatment tool according to the present invention, there is an effect that the treatment time of the living tissue can be shortened.

FIG. 1 is a diagram schematically illustrating a treatment system according to the first embodiment. FIG. 2 is an enlarged view of the distal end portion of the treatment instrument. FIG. 3 is a view showing a heat generating structure. FIG. 4 is a view showing a heat generating structure. FIG. 5 is a diagram showing a heat generating structure. FIG. 6 is a diagram illustrating an example of a heater manufacturing method. FIG. 7 is a diagram for explaining the effect of the first embodiment. FIG. 8 is a diagram showing a heat generating structure according to the second embodiment. FIG. 9 is a diagram showing a heat generating structure according to the second embodiment. FIG. 10 is a diagram illustrating a heater according to the third embodiment. FIG. 11 is a diagram showing a heat transfer plate according to the fourth embodiment. FIG. 12 is a diagram for explaining the effect of the fourth embodiment. FIG. 13 is a diagram showing a modification of the first to fourth embodiments. FIG. 14 is a diagram for explaining a problem in a conventional heat generating structure.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Furthermore, the same code | symbol is attached | subjected to the same part in description of drawing.

(Embodiment 1)
[Schematic configuration of treatment system]
FIG. 1 is a diagram schematically illustrating a treatment system 1 according to the first embodiment.
The treatment system 1 treats (joins (or anastomoses) and detaches, etc.) the living tissue by applying thermal energy to the living tissue to be treated. As illustrated in FIG. 1, the treatment system 1 includes a treatment tool 2, a control device 3, and a foot switch 4.

[Configuration of treatment tool]
The treatment tool 2 is, for example, a linear type surgical treatment tool for performing treatment on a living tissue through the abdominal wall. As shown in FIG. 1, the treatment tool 2 includes a handle 5, a shaft 6, and a grip portion 7.
The handle 5 is a part that the surgeon holds by hand. The handle 5 is provided with an operation knob 51 as shown in FIG.
As shown in FIG. 1, the shaft 6 has a substantially cylindrical shape, and one end (right end portion in FIG. 1) is connected to the handle 5. A gripping portion 7 is attached to the other end of the shaft 6 (left end portion in FIG. 1). An opening / closing mechanism (not shown) that opens and closes the first and second gripping members 8 and 9 constituting the gripping portion 7 according to the operation of the operation knob 51 by the operator is provided inside the shaft 6. It has been. Further, in the shaft 6, an electric cable C (FIG. 1) connected to the control device 3 is connected to the other end side (in FIG. 1) from one end side (right end side in FIG. 1) via the handle 5. (Up to the left end side).

(Configuration of gripping part)
FIG. 2 is an enlarged view of the distal end portion of the treatment instrument 2.
The gripping part 7 is a part that grips a living tissue and treats the living tissue. As shown in FIG. 1 or FIG. 2, the grip portion 7 includes first and second grip members 8 and 9.
The first and second gripping members 8 and 9 are pivotally supported on the other end (left end portion in FIGS. 1 and 2) of the shaft 6 so as to be openable and closable in the direction of the arrow R1 (FIG. 2). In response to the operation 51, the living tissue can be grasped.

[Configuration of first gripping member]
The “tip side” described below is the tip side of the gripping part 7 and means the left side in FIGS. Further, the “base end side” described below means the shaft 6 side of the gripping portion 7 and the right side in FIGS. 1 and 2.
The first gripping member 8 is disposed on the lower side in FIG. 1 or FIG. 2 with respect to the second gripping member 9. As shown in FIG. 2, the first gripping member 8 includes a first cover member 10 and a heat generating structure 11.

The first cover member 10 is configured by a long plate body extending in the longitudinal direction (left and right direction in FIGS. 1 and 2) from the distal end of the gripping portion 7 to the proximal end. In the first cover member 10, a concave portion 101 is formed on the upper surface in FIG.
The recess 101 is located at the center in the width direction of the first cover member 10 and extends along the longitudinal direction of the first cover member 10. Of the side wall portions constituting the recess 101, the base end side wall portion is omitted. The first cover member 10 is supported by the shaft 6 in a posture in which the concave portion 101 faces upward in FIG. 2 while supporting the heat generating structure 11 in the concave portion 101.

3 to 5 are views showing the heat generating structure 11. Specifically, FIG. 3 is a perspective view of the heat generating structure 11 as viewed from above in FIG. 4 is an exploded perspective view of the heat generating structure 11 shown in FIG. FIG. 5 is a cross-sectional view of the heat generating structure 11 cut from the front end side along a cut surface along the width direction.
The heat generating structure 11 is housed in the recess 101 in a state in which a part of the heat generating structure 11 protrudes upward from the recess 101 in FIG. The heat generating structure 11 generates heat energy under the control of the control device 3. As shown in FIGS. 2 to 5, the heat generating structure 11 includes a heat transfer plate 12, a heater 13 (FIGS. 3 to 5), and an adhesive member 14 (FIGS. 3 to 5).

The heat transfer plate 12 has a long thin plate (a long shape extending in the longitudinal direction of the gripping portion 7) made of a material such as copper, for example, with each surface on both sides in the width direction as a boundary at the center in the width direction. It has a shape bent so as to form an angle α (FIG. 5) with each other. In the first embodiment, the heat transfer plate 12 is formed to have a uniform thickness dimension.
Here, in the heat transfer plate 12, the upper surface in FIGS. 2 to 5 corresponds to the outer surface 121 according to the present invention. Further, the left surface of the outer surface 121 in FIG. 5 corresponds to the first inclined surface 1211 according to the present invention. Furthermore, the right surface of the outer surface 121 in FIG. 5 corresponds to the second inclined surface 1212 according to the present invention. Then, as shown in FIGS. 2 to 5, the first and second inclined surfaces 1211 and 1212 cross each other at an angle α to protrude upward in the longitudinal direction (according to the present invention). A ridge 1213 extending in the first direction) is formed.

In the heat transfer plate 12, the lower surface in FIGS. 3 to 5 which is opposite to the outer surface 121 corresponds to the inner surface 122 according to the present invention. Further, the inner surface 122 is opposite to the first inclined surface 1211, and the left surface of the inner surface 122 in FIG. 5 corresponds to the third inclined surface 1221 according to the present invention. Furthermore, the inner surface 122 is opposite to the second inclined surface 1212, and the right surface of the inner surface 122 in FIG. 5 corresponds to the fourth inclined surface 1222 according to the present invention. As shown in FIGS. 2 to 5, the third and fourth inclined surfaces 1221 and 1222 cross each other at an angle α on the inner surface 122 so as to oppose the ridge 1213 and upward. A concave portion 1223 is formed which is recessed toward the longitudinal direction and extends in the longitudinal direction.
The heat transfer plate 12 described above is accommodated in the recess 101 in a state where the protrusion 1213 protrudes upward from the recess 101 in FIG. The heat transfer plate 12 is in a state where the living tissue is gripped by the first and second gripping members 8 and 9, the outer surface 121 (protruding portion 1213) comes into contact with the living tissue, and the heater 13 Heat is transferred to the living tissue (thermal energy is applied to the living tissue).
In the first embodiment, the protrusion 1213 protrudes upward from the recess 101. However, the present invention is not limited to this, and the protrusion 1213 does not protrude upward from the recess 101. May be. In this case, in the 2nd holding member 9 mentioned later, the opposing board 18 is accommodated in the state which protruded below in FIG. 2 from the recessed part 171, Therefore The opposing board 18 and the heat exchanger plate 12 (outer surface 121) The living tissue can be grasped between the two.

A part of the heater 13 generates heat and functions as a sheet heater that heats the heat transfer plate 12 by the generated heat. As shown in FIGS. 3 to 5, the heater 13 includes a substrate 15 and a resistance pattern 16.
The substrate 15 is a long sheet (long shape extending in the longitudinal direction of the gripping portion 7) made of an insulating material such as polyimide. In the first embodiment, the substrate 15 is formed so that the thickness dimension is uniform.
The material of the substrate 15 is not limited to polyimide, and for example, a high heat insulating material such as aluminum nitride, alumina, glass, zirconia, etc. may be adopted.

The resistance pattern 16 is obtained by processing stainless steel (SUS304), which is a conductive material. As shown in FIGS. 3 to 5, a pair of connecting portions 161 (FIGS. 3 and 4) and a pattern body 162 (FIG. 4 and FIG. 5). The resistance pattern 16 is bonded to the upper surface 151 of the substrate 15 in FIGS. 3 to 5 by thermocompression bonding.
The material of the resistance pattern 16 is not limited to stainless steel (SUS304), and other stainless steel materials (for example, No. 400 series) may be used, or a conductive material such as platinum or tungsten may be adopted. In addition, the resistance pattern 16 is not limited to the configuration in which the substrate 15 is bonded to the surface 151 by thermocompression bonding, and a configuration in which the surface 151 is formed by vapor deposition, printing, or the like may be employed.

As shown in FIG. 3 or FIG. 4, the pair of connection portions 161 are respectively provided on the base end side of the substrate 15, extend from the base end side toward the tip end side, and extend along the width direction of the substrate 15. So as to face each other. Then, two lead wires CL (FIGS. 3 and 4) constituting the electric cable C are joined (connected) to the pair of connection portions 161, respectively.
One end of the pattern body 162 is connected (conductive) to one connecting portion 161, and extends from the one end along a U-shape following the outer edge shape of the substrate 15 while meandering in a wavy shape, and the other end is connected to the other end The connection part 161 is connected (conducted).
The resistance pattern 16 generates heat when a voltage is applied (energized) to the pair of connection portions 161 by the control device 3 via the two lead wires CL.

FIG. 6 is a diagram illustrating an example of a method for manufacturing the heater 13. Specifically, FIG. 6 is a perspective view of the heater 13 viewed from the heat transfer plate 12 side.
And in this Embodiment 1, the heater 13 is manufactured as shown below, for example.
First, the worker forms the resistance pattern 16 on one surface 151 of the flat substrate 15 as shown in FIG.
Next, as shown in FIG. 6B, the operator bends the substrate 15 and the resistance pattern 16 so that the surfaces on both sides in the width direction form an angle α with the center in the width direction of the substrate 15 as a boundary. .
The method for manufacturing the heater 13 is not limited to the above-described method, and the resistance pattern 16 may be formed on the substrate 15 that has been previously formed to have the shape shown in FIG. Further, the heat transfer plate 12 is not limited to the method of forming a flat thin plate by bending, and may be formed to have a bent shape. The same applies to the adhesive member 14 shown below.
Here, the length dimension between the left and right end portions of the substrate 15 in FIG. 5 is set to be smaller than the length dimension between the left and right end portions of the heat transfer plate 12 in FIG. Further, the length dimension in the longitudinal direction of the substrate 15 is set to be larger than the length dimension in the longitudinal direction of the heat transfer plate 12.

3 to 5, the adhesive member 14 is interposed between the inner surface 122 and the surface 151 (resistive pattern 16) of the substrate 15, and a part of the heater 13 is a base end of the heat transfer plate 12. The heat transfer plate 12 and the heater 13 are bonded and fixed in a state of protruding from the end on the side to the base end side. The adhesive member 14 is a long sheet (long form extending in the longitudinal direction of the gripping portion 7) having good thermal conductivity and electrical insulation, withstanding high temperatures, and having adhesiveness. Like the heat transfer plate 12, each surface on both sides in the width direction is bent at an angle α with the center in the width direction as a boundary. In the first embodiment, the adhesive member 14 is formed to have a uniform thickness dimension.
Here, the length dimension between the left and right ends in FIG. 5 of the adhesive member 14 is set to be substantially the same as the length dimension between the left and right ends in FIG. 5 of the heat transfer plate 12. Further, the length dimension in the longitudinal direction of the adhesive member 14 is set to be larger than the length dimension in the longitudinal direction of the heat transfer plate 12 and smaller than the length dimension of the substrate 15 in the longitudinal direction.
The length dimension of the adhesive member 14 is not limited to this, and the length dimension between the left and right ends of the adhesive member 14 may be larger than the length dimension between the left and right ends of the heat transfer plate 12. The length dimension between the left and right ends of the member 14 may be smaller than the length dimension between the left and right ends of the substrate 15.
And the heat-transfer plate 12 is arrange | positioned so that the pattern main body 162 whole may be covered, as shown in FIG. 3 or FIG. In addition, the adhesive member 14 is disposed so as to cover the entire pattern main body 162 and a part of the pair of connection portions 161. That is, the adhesive member 14 is arranged in a state of protruding to the proximal end side with respect to the heat transfer plate 12. Then, the pair of lead wires CL are connected (joined) to a region not covered with the adhesive member 14 in the pair of connection portions 161.

[Relationship between heat transfer plate and resistance pattern]
Next, the positional relationship between the heat transfer plate 12 and the resistance pattern 16 will be described.
In a state where the heat transfer plate 12 and the heater 13 are bonded and fixed by the adhesive member 14, the resistance pattern 16 faces the third and fourth inclined surfaces 1221 and 1222, respectively, as shown in FIG. And the resistance pattern 16 is located in the space Sp of the cross-sectional triangle shape in the concave streak part 1223. The center position C1 of the center positions C1 and C2 in the width direction in the resistance pattern 16 is more than the position C3 ′ on the surface 151 of the substrate 15 facing the center position C3 in the width direction on the third inclined surface 1221. Located on the fourth inclined surface 1222 side. Furthermore, the center position C2 is located closer to the third inclined surface 1221 than the position C4 ′ on the surface 151 of the substrate 15 facing the center position C4 in the width direction of the fourth inclined surface 1222.

[Configuration of Second Holding Member]
As shown in FIG. 2, the second holding member 9 includes a second cover member 17 and a counter plate 18.
The second cover member 17 has the same shape as the first cover member 10. That is, the 2nd cover member 17 has the recessed part 171 similar to the recessed part 101, as shown in FIG. The second cover member 17 is pivotally supported by the shaft 6 in a posture in which the concave portion 171 faces downward in FIG. 2 (a posture facing the concave portion 101) while supporting the counter plate 18 in the concave portion 101.
The counter plate 18 is made of a conductive material such as copper, for example. The counter plate 18 is configured by a flat plate having substantially the same planar shape as the concave portion 171 and is fixed in the concave portion 171. The opposing plate 18 grips the living tissue with the heat transfer plate 12 (outer surface 121).

[Configuration of control device and foot switch]
The foot switch 4 is a part operated by the operator with his / her foot. And according to the said operation to the foot switch 4, on / off of the electricity supply from the control apparatus 3 to the treatment tool 2 (resistance pattern 16) is switched.
Note that the means for switching on and off is not limited to the foot switch 4, and a switch operated by hand or the like may be employed.
The control device 3 includes a CPU (Central Processing Unit) and the like, and comprehensively controls the operation of the treatment instrument 2 according to a predetermined control program. More specifically, the control device 3 applies a voltage to the resistance pattern 16 via the electric cable C in response to an operation to the foot switch 4 by the operator (operation to turn on the power), and the heat transfer plate 12 is moved. Heat.

[Action system action]
Next, operation | movement of the treatment system 1 mentioned above is demonstrated.
The surgeon holds the treatment instrument 2 by hand, and inserts the distal end portion of the treatment instrument 2 (a part of the gripping portion 7 and the shaft 6) into the abdominal cavity through the abdominal wall using, for example, a trocar. Then, the surgeon operates the operation knob 51 and grips the living tissue to be treated with the grip portion 7 (the heat transfer plate 12 and the opposing plate 18).
Next, the surgeon operates the foot switch 4 to turn on the power supply from the control device 3 to the treatment instrument 2. When switched on, the control device 3 applies a voltage to the resistance pattern 16 via the electric cable C to heat the heat transfer plate 12. Then, the living tissue in contact with the heat transfer plate 12 is treated by the heat of the heat transfer plate 12.

According to the first embodiment described above, the following effects are obtained.
FIG. 7 is a diagram for explaining the effect of the first embodiment. Specifically, FIG. 7 shows the temperature change of the apex portion of the protrusion 1213 when the resistance pattern 16 is heated in the heat generating structure 11 according to the first embodiment. In FIG. 7, the temperature change of the resistance pattern 16 is indicated by a one-dot chain line, and the temperature change of the apex portion of the protrusion 1213 is indicated by a solid line. Further, in order to compare with the heat generating structure 11 according to the first embodiment, in the conventional heat generating structure 11 ′ (FIG. 14) that does not have the concave stripe portion 1223, the resistance pattern 16 ′ is heated. The change in temperature at the apex of the protruding portion 1213 ′ is indicated by a broken line. Note that the temperature change of the resistance pattern 16 ′ is the same as the temperature change of the resistance pattern 16 (the chain line in FIG. 7).

In the heat generating structure 11 according to the first embodiment, the inner surface 122 of the heat transfer plate 12 is provided with a concave line portion 1223 extending in the longitudinal direction at a position facing the protruding line portion 1213. And the resistance pattern 16 is located in the space Sp of the cross-sectional triangle shape in the concave streak part 1223.
For this reason, compared with the distance from the resistance pattern 16 ′ in the conventional heating structure 11 ′ shown in FIG. 14 to the apex portion of the ridge portion 1213 ′, from the resistance pattern 16 to the apex portion of the ridge portion 1213. Can be shortened. That is, as compared with the conventional heat generating structure 11 ′, the temperature raising time at the apex portion of the protrusion 1213 can be accelerated. For example, as shown in FIG. 7, in the conventional heat generating structure 11 ′ shown in FIG. 14, it takes 1 second or more to set the apex portion of the protrusion 1213 ′ to 250 ° C., but this Embodiment 1 In the heat generating structure 11 according to the above, the apex portion of the protruding portion 1213 can be raised to 250 ° C. in less than 1 second.
Therefore, according to the heat generating structure 11 according to the first embodiment, there is an effect that the treatment time of the living tissue can be shortened.

In the heat generating structure 11 according to the first embodiment, one center position C1 of the resistance pattern 16 is a position on the surface 151 of the substrate 15 facing the center position C3 in the width direction of the third inclined surface 1221. It is located closer to the fourth inclined surface 1222 than C3 ′. The other center position C2 is located closer to the third inclined surface 1221 than the position C4 ′ on the surface 151 of the substrate 15 facing the center position C4 in the width direction of the fourth inclined surface 1222.
For this reason, the resistance pattern 16 can be arrange | positioned in the position close | similar to the vertex part in the protrusion part 1213, and the temperature rising time of the said vertex part can be accelerated more.

(Embodiment 2)
Next, the second embodiment will be described.
In the following description, the same reference numerals are given to the same components as those in the first embodiment described above, and detailed description thereof will be omitted or simplified.
8 and 9 are views showing a heat generating structure 11A according to the second embodiment. Specifically, FIG. 8 is a perspective view of the heat generating structure 11A corresponding to FIG. 9 is an exploded perspective view of the heat generating structure 11A shown in FIG.
As shown in FIG. 8 or FIG. 9, the second embodiment is different from the first embodiment described above in that a heat generating structure 11A different from the heat generating structure 11 is employed.
In the heat generating structure 11A, the first and second heaters 13A1, 13A2, and the first and first heaters 13A1, 13A2 are different in shape from the heater 13 and the adhesive member 14 with respect to the heat generating structure 11 described in the first embodiment. Two adhesive members 14A1 and 14A2 are employed.

As shown in FIG. 8 or FIG. 9, the first heater 13A1 includes a first substrate 15A1 and a first resistance pattern 16A1.
The first substrate 15A1 is made of the same material as the substrate 15 described in the first embodiment, and has the same shape as one of two bodies obtained by dividing the substrate 15 at the center in the width direction.
The first resistance pattern 16A1 is made of the same material as the resistance pattern 16 described in the first embodiment and has the same configuration. In FIGS. 8 and 9 of the first substrate 15A1, It is provided on the upper first surface 151A1. That is, the first resistance pattern 16A1 includes a pair of first connection portions 161A1 and a first pattern body 162A1 similar to the pair of connection portions 161 and the pattern body 162 described above.
As shown in FIG. 8 or FIG. 9, the second heater 13A2 has the same configuration and shape as the first heater 13A1. That is, the second heater 13A2 includes the first substrate 15A1 (including the first surface 151A1) and the first resistance pattern 16A1 (including the pair of first connection portions 161A1 and the first pattern body 162A1). A similar second substrate 15A2 (including the second surface 151A2) and a second resistance pattern 16A2 (including a pair of second connection portions 161A2 and a second pattern body 162A2) are provided.

The first and second adhesive members 14A1 and 14A2 are obtained by dividing the adhesive member 14 described in the first embodiment described above at the center in the width direction.
The first adhesive member 14A1 is interposed between the third inclined surface 1221 and the first surface 151A1, and bonds and fixes the heat transfer plate 12 and the first heater 13A1. In this state, the first resistance pattern 16A1 faces the third inclined surface 1221. And 1st resistance pattern 16 A1 is located in the space Sp (FIG. 9) of the cross-sectional triangle shape in the concave part 1223. FIG. Further, the center position C1 (FIG. 9) in the width direction of the first resistance pattern 16A1 is the first position of the first substrate 15A1 facing the center position C3 (FIG. 9) in the width direction of the third inclined surface 1221. It is located closer to the fourth inclined surface 1222 than the position C3 ′ (FIG. 9) on the surface 151A1.
The second adhesive member 14A2 is interposed between the fourth inclined surface 1222 and the second surface 151A2, and adheres and fixes the heat transfer plate 12 and the second heater 13A2. In this state, the second resistance pattern 16A2 faces the fourth inclined surface 1222. And 2nd resistance pattern 16A2 is located in the space Sp (FIG. 9) of the cross-sectional triangle shape in the concave-line part 1223. FIG. Further, the center position C2 (FIG. 9) in the width direction of the second resistance pattern 16A2 is the second position of the second substrate 15A2 facing the center position C4 (FIG. 9) in the width direction of the fourth inclined surface 1222. It is located closer to the third inclined surface 1221 than the position C4 ′ (FIG. 9) on the surface 151A2.

Even when the heater and the adhesive member are each composed of two bodies of the first and second heaters 13A1, 13A2 and the first and second adhesive members 14A1, 14A2 as in the second embodiment described above. The same effects as those of the first embodiment described above are obtained.

(Embodiment 3)
Next, the third embodiment will be described.
In the following description, the same reference numerals are given to the same components as those in the first embodiment described above, and detailed description thereof will be omitted or simplified.
FIG. 10 is a diagram showing a heater 13B according to the third embodiment. Specifically, FIG. 10 is a perspective view of the heater 13B viewed from the heat transfer plate 12 side.
As shown in FIG. 10, the third embodiment is different from the first embodiment described above in that a heater 13B different from the heater 13 is employed.
As shown in FIG. 10, the heater 13 </ b> B includes a substrate 15 </ b> B made of the same material as the substrate 15 described in the first embodiment and the same material as the resistance pattern 16 described in the first embodiment. And a resistance pattern 16B constituted by

As shown in FIG. 10, the substrate 15 </ b> B is a U-shaped sheet that is located at the center in the width direction and has a notch 152 that extends from the distal end toward the proximal end.
The resistance pattern 16B is obtained by changing the shape of the pattern main body 162 in accordance with the planar shape of the substrate 15B with respect to the resistance pattern 16B described in the first embodiment. Specifically, the pattern main body 162 in the resistance pattern 16B has one end connected (conducted) to one connection portion 161, and follows the M-shape following the outer edge shape of the substrate 15B while meandering from the one end. The other end is connected (conducted) to the other connecting portion 161.

In the first embodiment, although not shown in the drawings, the heater 13B has the substrate 15B and the resistance pattern 16B so that the surfaces on both sides in the width direction form an angle α with the notch 152 as a boundary. It is formed by bending. The method of manufacturing the heater 13B is not limited to the above-described method, and the resistance pattern 16B may be formed on the substrate 15B that has been previously bent.
The positional relationship between the heat transfer plate 12 and the resistance pattern 16B is the same as the positional relationship described in the first embodiment.

Even when the heater 13B as in the third embodiment described above is employed, the same effects as those in the first embodiment described above can be obtained.
Note that the shape of the substrate 15B is not limited to a U shape in a plan view, and may be a Y-shaped sheet in a plan view with a front end divided into two.

(Embodiment 4)
Next, the fourth embodiment will be described.
In the following description, the same reference numerals are given to the same components as those in the first embodiment described above, and detailed description thereof will be omitted or simplified.
FIG. 11 is a diagram showing a heat transfer plate 12C according to the fourth embodiment. Specifically, FIG. 11 is a cross-sectional view of the heat transfer plate 12C cut from a cutting surface along the width direction and viewed from the front end side.
As shown in FIG. 11, the fourth embodiment is different from the first embodiment described above in that a heat transfer plate 12C different from the heat transfer plate 12 is employed.

As shown in FIG. 11, the heat transfer plate 12 </ b> C has a different cross-sectional shape from the heat transfer plate 12 described in the first embodiment.
Specifically, in the heat transfer plate 12, the angle formed by the first and second inclined surfaces 1211 and 1212 and the angle formed by the third and fourth inclined surfaces 1221 and 1222 are set to the same angle α. It was. That is, the heat transfer plate 12 has a uniform thickness dimension.
In contrast, in the heat transfer plate 12C according to the fourth embodiment, as shown in FIG. 11, the angle formed by the first and second inclined surfaces 1211 and 1212 is set to the first angle α1. Yes. On the other hand, the angle formed by the third and fourth inclined surfaces 1221 and 1222 is set to a second angle α2 that is larger than the first angle α1. That is, the heat transfer plate 12 </ b> C is set such that the thickness dimension becomes smaller toward both sides in the width direction.
The positional relationship between the heat transfer plate 12C and the resistance pattern 16 is the same as the positional relationship described in the first embodiment.

According to the fourth embodiment described above, the following effects are obtained in addition to the same effects as those of the first embodiment.
FIG. 12 is a diagram for explaining the effect of the fourth embodiment. Specifically, FIG. 12 is a cross-sectional view corresponding to FIG. 11 in which the angle formed by the third and fourth inclined surfaces 1221 and 1222 is a third angle α3 smaller than the first angle α1. A hot plate 12C 'is shown.
By the way, as shown in FIG. 12, the angle (the third angle) formed by the third and fourth inclined surfaces 1221 and 1222 is larger than the angle (the first angle α1) formed by the first and second inclined surfaces 1211 and 1212. When the angle α3) is reduced, the normal directions N1 and N2 of the resistance pattern 16 (pattern body 162) are away from the apex portion of the protrusion 1213. The normal directions N1 and N2 mean the direction of heat transfer from the resistance pattern 16. For this reason, it is difficult to effectively speed up the temperature raising time of the apex portion.
On the other hand, in the heat transfer plate 12C according to the fourth embodiment, the third and fourth inclined surfaces 1221 are larger than the angle (first angle α1) formed by the first and second inclined surfaces 1211 and 1212. , 1222 (second angle α2) is set large. For this reason, the normal directions N1 and N2 (FIG. 11) of the resistance pattern 16 (pattern body 162) approach the apex portion of the ridge portion 1213. Therefore, it is possible to effectively speed up the temperature raising time of the apex portion.

(Other embodiments)
So far, the embodiment for carrying out the present invention has been described, but the present invention should not be limited only by the embodiment described above.
FIG. 13 is a diagram showing a modification of the first to fourth embodiments. Specifically, FIG. 13 is a cross-sectional view of the heat generating structure 11D according to the present modification taken along the cut surface along the width direction and viewed from the front end side.
In the first to fourth embodiments described above, the thickness dimension of the adhesive member 14 (14A1, 14A2) is set to be uniform. However, the present invention is not limited to this. For example, an adhesive member 14D having a non-uniform thickness may be employed as in the heat generating structure 11D according to the present modification shown in FIG.
In the first to fourth embodiments described above, the shape of the heater 13 (13A1, 13A2) is set so that the normal directions N1, N2 of the resistance pattern 16 (16A1, 16A2) do not intersect. Not limited to this. For example, the shape of the heater 13 may be set so that the normal directions N1 and N2 of the resistance pattern 16 (16A1 and 16A2) intersect as in the heat generating structure 11D according to the present modification illustrated in FIG. I do not care. Even if it is a case where it comprises in this way, it is preferable that the resistance pattern 16 is located in the space Sp in the groove part 1223. FIG.

In the above-described first to fourth embodiments and the modification shown in FIG. 13, the protruding portion 1213 has a shape in which the first and second inclined surfaces 1211 and 1212 intersect each other and the apex portion is sharp. However, it is not limited to this. For example, the first and second inclined surfaces may not be connected, and a flat surface may be interposed between the first and second inclined surfaces. Similarly, the concave strip portion 1223 has a space Sp having a triangular cross-section when the third and fourth inclined surfaces 1221 and 1222 intersect each other, but the present invention is not limited thereto. For example, the third and fourth inclined surfaces may not be connected, and a flat surface may be interposed between the third and fourth inclined surfaces so as to have a trapezoidal space.
In the above-described first to fourth embodiments and the modification shown in FIG. 13, all of the resistance patterns 16 (16A1, 16A2) are located in the space Sp in the concave strip portion 1223. However, the present invention is not limited to this. Only a part of the space Sp may be used.

In the above-described first to fourth embodiments and the modification example shown in FIG. 13, the first and second gripping members 8 and 9 are opened and closed as the gripping portion 7. A configuration in which the holding member 9 is omitted may be adopted.
In the above-described first to fourth embodiments and the modification shown in FIG. 13, the heating structure 11 (11A, 11D) is provided only on the first gripping member 8. However, the present invention is not limited to this. The member 9 may be provided with a similar heat generating structure 11 (11A, 11D).
In the above-described first to fourth embodiments and the modification shown in FIG. 13, the treatment instrument 2 is configured to apply thermal energy to the living tissue. Alternatively, a configuration that further applies ultrasonic energy may be employed.

DESCRIPTION OF SYMBOLS 1 Treatment system 2 Treatment tool 3 Control apparatus 4 Foot switch 5 Handle 6 Shaft 7 Gripping part 8,9 1st, 2nd holding member 10 1st cover member 11,11 ', 11A, 11D Heat generating structure 12,12 ', 12C, 12C' Heat transfer plate 13, 13 ', 13B Heater 13A1, 13A2 First and second heaters 14, 14' Adhesive member 14A1, 14A2 First and second adhesive members 15, 15 ', 15B Substrate 15A1, 15A2 First and second substrates 16, 16 ', 16B Resistance pattern 16A1, 16A2 First, second resistance pattern 17 Second cover member 18 Opposing plate 51 Operation knob 101 Recess 121, 121' Outer surface 122 , 122 ′ inner surface 151, 151 ′ surface 151A1, 151A2 first and second surfaces 152 notch 161 connecting portion 161A1, 61A2 First and second connection parts 162 Pattern main body 162A1, 162A2 First and second pattern main bodies 171 Recessed parts 1211, 1212 First and second inclined surfaces 1213, 1213 ′ Projections 1221, 1222 Third, third 4 inclined surface 1223 concave portion C electric cable C1 to C4 center position C3 ′, C4 ′ position CL lead wire N1, N2 normal direction R1 arrow Sp space α angle α1 to α3 first to third angle

Claims (7)

A resistance pattern that generates heat when energized;
A heat transfer plate having an outer surface and an inner surface that forms a front and back surface with the outer surface, to which heat from the resistance pattern is transmitted;
An adhesive member interposed between the resistance pattern and the inner surface, for bonding and fixing the resistance pattern and the heat transfer plate;
On the outer surface,
A ridge extending along the first direction is provided;
On the inner surface,
A concave portion extending along the first direction is provided at a position facing the protruding portion,
At least a part of the resistance pattern is
A heat generating structure located in the concave portion. The outer surface is
A first inclined surface and a second inclined surface that intersect with each other to form the protruding portion,
The inner surface is
A third inclined surface and a fourth inclined surface which intersect with each other to form the concave stripe portion,
The resistance pattern is
The heat generating structure according to claim 1, wherein the heat generating structure is disposed to face the third inclined surface and the fourth inclined surface. The first inclined surface and the second inclined surface are:
Intersect at a first angle,
The third inclined surface and the fourth inclined surface are:
The heat generating structure according to claim 2, which intersects at a second angle larger than the first angle. Each center position in the width direction in the resistance pattern is
The position on the fourth inclined surface side with respect to the center position in the width direction of the third inclined surface, and the position on the third inclined surface side with respect to the center position in the width direction of the fourth inclined surface. The heat generating structure according to claim 2, which faces each other. The resistance pattern is
It is composed of two bodies, a first resistance pattern disposed independently of each other and facing the third inclined surface, and a second resistance pattern disposed facing the fourth inclined surface. The heat generating structure according to any one of claims 2 to 4. The adhesive member is
A first adhesive member that bonds and fixes the first resistance pattern to the third inclined surface and a second adhesive member that bonds and fixes the second resistance pattern to the fourth inclined surface independently of each other. The heat generating structure according to claim 5. A treatment instrument comprising the heat generating structure according to any one of claims 1 to 6.

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