JP4110288B2 - Endoscopy forceps - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscopic forceps such as a biopsy forceps that is used by being inserted from a forceps hole of an endoscope.
[0002]
[Prior art]
Japanese Examined Patent Publication No. 7-28854 discloses an endoscopic forceps in which an insertion portion of an endoscopic forceps and a forceps portion are joined by laser light. According to this endoscopic forceps, by inserting the end portion of the close contact coil spring constituting the insertion portion into the cylindrical member constituting the forceps portion, the laser beam is irradiated from the outer peripheral surface of the cylindrical member. The insertion part and the forceps part are welded and joined.
[0003]
[Problems to be solved by the invention]
However, the forceps for endoscope disclosed in the Japanese Patent Publication No. 7-28854 has an uneven surface melted by the heat of laser light on the outer peripheral surface of the cylindrical member that contacts the patient's body. In some cases, secondary processing is required to process the surface flatly.
[0004]
This invention is made | formed in view of such a situation, and it aims at providing the forceps for endoscopes which can join an insertion part and a forceps part, without taking an effort.
[0005]
[Means for Solving the Problems]
In order to achieve the object, the present invention provides an endoscopic forceps comprising a hand operation part and a forceps part connected to the hand operation part via an insertion part, and a cylindrical shape constituting the forceps part. The entire end surface of the insertion portion is brought into contact with the receiving surface formed inside the end portion of the member, and laser light is irradiated from the outside of the end portion of the cylindrical member toward the receiving surface to receive the cylindrical member. The insertion portion and the forceps portion are joined by welding the surface and the end face of the insertion portion.
[0006]
According to the present invention, the entire end surface of the insertion portion is brought into contact with the receiving surface formed at the end portion of the cylindrical member, the end portion of the cylindrical member is irradiated with laser light, and the receiving surface of the cylindrical member is inserted. The end face of the part is welded. In this case, an uneven surface melted by the heat of the laser beam is formed at the end of the cylindrical member, but the end of the cylindrical member is not a portion that contacts the patient's body, so the uneven surface is flattened. There is no need to process. Thereby, according to this invention, since the secondary process for flat-processing an uneven surface is unnecessary, an insertion part and a forceps part can be joined without taking effort. In addition, according to the present invention, since the entire end surface of the insertion portion is brought into contact with the receiving surface of the cylindrical member for welding, the welding efficiency is improved.
[0007]
When the insertion portion is formed of a close coil spring, the end surface of the close coil spring is polished so that the entire end surface of the close coil spring contacts the receiving surface of the cylindrical member. Thereby, since the whole end surface of a close_contact | adherence coil spring contacts the receiving surface of a cylindrical member, welding efficiency improves.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the forceps for endoscope according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a front view of a biopsy forceps 10 to which an endoscopic forceps of the present invention is applied. A biopsy forceps 10 shown in FIG. 1 includes a hand operation unit 12 used by an operator during operation, an insertion unit 14 to be inserted into a forceps hole of an endoscope, and a forceps unit 16.
[0009]
The hand operating section 12 is provided with a shaft-like body 18, and this shaft-like body 18 is slidably inserted into a manipulator 20 formed in a cylindrical shape. Flange 22 and 24 are formed at the upper and lower ends of the operation element 20, and screws (not shown) are provided in the radial direction inside the operation element 20. It is screwed into a slider (not shown) that is slidably disposed therein. Thereby, the operation element 20 and the slider are integrally connected. A proximal end portion of the operation wire 26 is fixed to the slider, and a distal end portion of the operation wire 26 is connected to the forceps portion 16.
[0010]
A ring-shaped finger hook 28 is formed at the upper end of the shaft-like body 18. During operation, the operator's thumb is inserted into the finger hanging portion 28. In this state, the index finger and the middle finger are inserted between the flange 22 and the flange 24 of the operation element 20, and then the operation element 20 is pushed and pulled. It has come to be. When the operation element 20 is operated, the forceps 16 connected via the slider and the operation wire 26 is operated.
[0011]
The hand operating portion 12 is formed of a close contact coil spring 30 having an outer peripheral portion having flexibility. The proximal end portion of the contact coil spring 30 is fixed to the lower end portion of the shaft-like body 18. The operation wire 26 is inserted into the close contact coil spring 30, and the distal end portion of the close contact coil spring 30 is a forceps portion main body (corresponding to a tubular member) 32 formed in a substantially cylindrical shape constituting the forceps portion 16. It is joined to.
[0012]
As shown in FIG. 2, the forceps portion 16 includes a connection block 34 connected to the distal end portion of the operation wire 26, and links 38 and 40 are rotatably supported by the connection block 34 via pins 36. ing. The other ends of the links 38 and 40 are connected to forceps pieces 46 and 48 formed in a substantially square shape via pins 42 and 44, respectively. The forceps pieces 46 and 48 are pivotally supported on the forceps portion main body 32 via the pins 50 at the overlapping portions. Accordingly, the forceps pieces 46 and 48 of the forceps section 16 are opposite to each other about the pin 50 in FIG. 2 when the operation element 20 in FIG. 1 is moved up and down and the operation wire 26 is pushed or retracted. And is opened and closed.
[0013]
Referring to method of joining the said contact coil spring 30 and the gripper body 32, the distal end surface (the end turn portions) 51 of the contact spring 30, as shown in FIG. 3, the surface entire body, the gripper body 32 Polishing is performed so as to contact the receiving surface 52 formed inside the end portion 32A. Further, it can be confirmed from the observation window 33 opened in the corner portion of the end portion 32A that the entire front end surface 51 is in contact with the receiving surface 52.
[0014]
In joining, first, the entire front end surface 51 is brought into contact with the receiving surface 52 of the forceps portion main body 32. Then, the receiving surface 52 of the forceps portion main body 32 and the distal end surface 51 of the contact coil spring 30 are welded by spotting or continuously irradiating the CO2 laser from the outside of the end portion 32A toward the receiving surface 52. Thereby, the close contact coil spring 30 and the forceps portion main body 32 are joined.
[0015]
In the joining method of the present embodiment, an uneven surface melted by the heat of the CO2 laser is formed on the end portion 32A of the forceps portion main body 32, but the end portion 32A of the forceps portion main body 32 is not in a portion that contacts the patient's body. There is no need to process the uneven surface flatly. Therefore, according to the joining method, secondary processing for flattening the uneven surface formed on the end portion 32A becomes unnecessary, so that the close contact coil spring 30 and the forceps portion main body 32 are joined without taking time and effort. be able to.
[0016]
In the present embodiment, the tip end surface 51 of the contact coil spring 30 is polished as described above, so that the welding efficiency between the contact coil spring 30 and the forceps main body 32 is improved. When spot welding is performed, two thick portions of the end winding portion of the contact coil spring 30 are selected, and a CO2 laser is irradiated toward these portions. The laser used for welding is not limited to the CO2 laser, but may be a YAG laser. In short, an appropriate laser may be selected in consideration of the thickness, material, and the like of the close contact coil spring 30 and the forceps portion main body 32. Further, if the contact coil spring 30 and the forceps portion main body 32 are joined with the solder 54 after welding by the laser, the contact coil spring 30 and the forceps portion main body 32 can be joined more firmly.
[0017]
Further, in the present embodiment, the method of joining the close contact coil spring 30 of the biopsy forceps 10 and the forceps main body 32 has been described. However, the present invention is not limited to this, and the present invention can be applied to other forceps. Good.
Further, in the present embodiment, the close contact coil spring 30 is exemplified as the insertion portion. However, the present invention is not limited to this, and is applicable as long as it is flexible and can be laser-welded to the forceps portion main body 32. can do.
[0018]
【The invention's effect】
As described above, according to the forceps for endoscope according to the present invention, the entire end surface of the insertion portion is brought into contact with the receiving surface formed at the end portion of the cylindrical member, and the laser is applied to the end portion of the cylindrical member. Since light is irradiated and the receiving surface of the cylindrical member and the end surface of the insertion portion are welded together, the insertion portion and the forceps portion can be joined without taking time and welding efficiency is improved.
[Brief description of the drawings]
FIG. 1 is an overall view of a biopsy forceps according to the present embodiment. FIG. 2 is a cross-sectional view of a forceps portion of the biopsy forceps shown in FIG. Enlarged sectional view showing the joining method [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Biopsy forceps, 30 ... Close_contact | adherence coil spring, 32 ... Forceps part main body, 33 ... Observation window, 51 ... End surface of close_contact | adherence coil spring, 52 ... Reception surface of forceps part main body

Claims (2)

In an endoscopic forceps comprising a hand operation part and a forceps part connected to the hand operation part via an insertion part,
The entire end surface of the insertion portion is brought into contact with the receiving surface formed inside the end portion of the cylindrical member constituting the forceps portion, and laser light is irradiated from the outside of the end portion of the cylindrical member toward the receiving surface. And the forceps for endoscope which joined the insertion part and forceps part by welding the receiving surface of a cylindrical member, and the end surface of an insertion part.   The said insertion part is comprised with the close_contact | adherence coil spring, The end surface of this close_contact | adherence coil spring is grind | polished so that the whole end surface may contact the receiving surface of the said cylindrical member. Endoscopic forceps.

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