Heating blade unit, treatment tool, and method of manufacturing heating blade unit

Patent metadata

Field	Value
Publication number	US-12453591-B2
Application number	US-202217849111-A
Country	US
Kind code	B2
Filing date	Jun 24, 2022
Priority date	Apr 21, 2020
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A heating blade unit, a treatment tool, and a method of manufacturing a heating blade unit are disclosed. The heating blade unit includes: an electric heater, a blade, and a cover made of a thermosetting resin. The blade includes a treatment surface, an installation surface that is provided on a side opposite to the treatment surface and on which the electric heater is installed, and a support surface that is provided at a position different from a position at which the installation surface is provided. The cover integrally covers the electric heater, and one or more surfaces of the blade.

First claim

What is claimed is:

1. A treatment tool comprising:
an electric heater,
a blade including:
a treatment surface configured to perform treatment on a biological tissue,
an installation surface provided on a side opposite to the treatment surface, the electric heater installed on the installation surface, and
a flange protruding outward from a lateral side of the blade in a width direction transverse to the stacking direction of the blade and the electric heater, the flange including a support surface provided at a different position from the installation surface in a stacking direction of the blade and the electric heater, the support surface being opposite to the treatment surface,

a resin cover covering the electric heater, the installation surface, and at least a part of the support surface; and
a holder holding the blade and the resin cover, the holder directly contacting both the resin cover and the blade.

2. The treatment tool according to claim 1 , further comprising
a pair of grippers, and
a heating blade unit disposed on at least one of the pair of grippers, the heating blade unit including the electric heater, the blade, the resin cover, and the holder.

3. The treatment tool according to claim 1 , further comprising a water-resistant sealing structure for performing treatment in a liquid.

4. The treatment tool according to claim 1 , wherein the holder includes a frame disposed in the holder.

5. The treatment tool according to claim 1 , wherein the blade includes a roughened surface formed by a surface roughening treatment, the roughened surface being in contact with the resin cover and being covered with the resin cover.

6. The treatment tool according to claim 5 , wherein the treatment surface of the blade has a surface treatment for preventing sticking of the biological tissue.

7. The treatment tool according to claim 1 , further comprising
a high frequency electric wire that is provided with an insulating outer coating, the high frequency electric wire being configured to supply a high frequency current to the blade, wherein the blade has electrical conductivity.

8. The treatment tool according to claim 1 , further comprising
an adhesive layer adhered to the installation surface, wherein
the electric heater is fixed to the installation surface via the adhesive layer.

9. The treatment tool according to claim 1 , wherein the resin cover is made of a thermosetting resin including a filler for adjusting a thermal expansion coefficient.

10. The treatment tool according to claim 9 , wherein a thermal expansion coefficient of the resin cover is equivalent to a thermal expansion coefficient of the blade.

11. The treatment tool according to claim 1 , wherein at least a part of the support surface contacts the resin cover.

12. The treatment tool according to claim 1 , further comprising:
a power source configured to supply power to the electric heater; and
a housing that holds the power source.

13. A treatment tool comprising:
an electric heater,
a blade including:
a treatment surface configured to perform treatment on a biological tissue,
an installation surface provided on a side opposite to the treatment surface, the electric heater installed on the installation surface, and
a support surface provided at a different position from the installation surface in a stacking direction of the blade and the electric heater,

a resin cover covering the electric heater, the installation surface, and at least a part of the support surface;
a holder holding the blade and the resin cover, the holder directly contacting both the resin cover and the blade; and
two heater electric wires configured to supply power to the electric heater, wherein
the electric heater includes a first heater portion adhered to the blade and a second heater portion extending from a proximal end side of the blade in an extending direction of the blade,
the second heater portion includes connection portions to which the two heater electric wires are connected respectively, and
the resin cover covers the first heater portion and the second heater portion.

14. The treatment tool according to claim 13 , wherein each of the two heater electric wires includes an insulating outer coating, and the insulating outer coating includes a portion that has been subjected to a surface treatment for improving adhesion with the resin cover.

15. The treatment tool according to claim 13 , wherein a core wire of each of the two heater electric wires is a single-wire electrically conductive wire.

16. The treatment tool according to claim 13 , wherein the electric heater includes a resistance pattern in the first heater portion and the second heater portion.

17. The treatment tool according to claim 13 , wherein the heater electric wires are disposed within a range of a width of the installation surface in a view from the extending direction of the blade.

18. The treatment tool according to claim 13 , further comprising
a high frequency electric wire configured to supply a high frequency current to the blade, wherein
the blade has electrical conductivity, and
the high frequency electric wire is disposed between the two heater electric wires.

19. The treatment tool according to claim 16 , wherein the resistance pattern of the electric heater is configured to generate heat to a temperature of 200° C. or higher and 350° C. or lower.

Assignees

• Olympus Corp

Inventors

• Tanaka Kazuhiro
• Kazuno Hiroki

Classifications

• B29L2031/779

  Heating equipment · CPC title

• B29K2701/10

  Thermosetting resins · CPC title

• B29C66/03

  After-treatments in the joint area (B29C66/3262 takes precedence) · CPC title

• B29C66/02

  Preparation of the material, in the area to be joined, prior to joining or welding (B29C66/32 takes precedence) · CPC title

• B29C65/48

  using adhesives {, i.e. using supplementary joining material; solvent bonding} · CPC title