JP2018134362A - Joint barrels for instrument fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide joint barrels for constituting bellows to flexibly fix a surgical treatment instrument such as a cerebral spatula, an endoscope, etc. fixed to an attachment in a fixing device to fix the surgical treatment instrument when a surgical operation is conducted, the retention force of the joint barrels is increased, and with the joint barrels, when a wire is loosened to change the shape of bellows, the shape of the bellows can be smoothly changed without each of the joint barrels being coupled to each other.SOLUTION: Each of the joint barrels is configured such that: the joint barrel is formed to have a shape including a spherical ball part with an upper portion horizontally cut slightly and a columnar part provided beneath the ball part; inside the columnar part, a receiving groove into which the upper portion of the ball part of another joint barrel is inserted is bored hemispherically with the same diameter as the ball part; and an insertion hole through which a wire is inserted is bored to articulate multiple joint barrels.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an instrument fixing device for fixing a surgical treatment instrument such as a brain spatula or an endoscope used when performing a surgical operation, for flexibly fixing a surgical treatment instrument fixed to an attachment. The present invention relates to a joint piece constituting the bellows.

  Conventionally, an instrument fixing device is used to fix a surgical treatment instrument such as a brain spatula or an endoscope used when performing a surgical operation. As an instrument fixing means for the surgical treatment instrument in the instrument fixing device, an attachment for fixing the surgical treatment instrument is disposed at the distal end portion of the bellows configured to be bent by inserting a number of joint pieces through the wire. In addition, there is a device fixing device configured by arranging a cylinder unit for fixing the device at an arbitrary position by tightening the wire at the base end portion of the bellows, and the applicant of the present application also discloses Japanese Patent Application Laid-Open No. 2011-83567. It was proposed in the name of the invention “Guide Fixing Device”.

JP2011-83567

  2A and 2B are external views of a conventional joint piece for an instrument fixing device, where FIG. 2A is a front view and FIG. 2B is a front sectional view. As shown in the figure, the joint piece 6 used in the instrument fixing device described in the above-mentioned Japanese Patent Application Laid-Open No. 2011-83567 includes a spherical sphere portion 7 whose upper portion is slightly cut horizontally, A cylindrical portion 8 is formed in the lower portion, and a receiving groove 11 for inserting the upper portion of the spherical portion 7 of another joint piece 6 is cut into a conical shape inside the cylindrical portion 8. An insertion hole 10 for connecting a number of joint pieces 6 through a wire is cut and configured.

  However, since the shape of the receiving groove 11 of the conventional joint piece 6 is a conical groove, the inclination is a straight line. For example, the upper part of the spherical portion 7 of another joint piece 6 is linearly connected to the receiving groove 11. When inserted, the contact portion 13 was a single ring-shaped line, that is, a line contact, as shown in FIG. For this reason, when a wire in the bellows constituted by inserting a large number of joint pieces 6 is tightened and fixed, a certain holding force can be obtained, but it is not sufficient. The instrument may swing, and further enhancement of the holding force has been demanded. Further, the conventional articulated piece 6 is held by sintering the inorganic friction material 9 on one or both of the upper outer surface of the circular sphere portion 7 and the lower inner surface of the cylindrical portion 8 in order to increase the holding force. Although it was effective in increasing the force, even when the wire was loosened in order to change the shape of the bellows, the inorganic friction material 9 was connected to the surface 11a in the receiving groove 11, and the joint pieces 6 were in a fixed state. The problem that the shape of the bellows could not be changed smoothly occurred as it was kept.

  The present invention is made in order to solve the above-mentioned demands and problems, in an instrument fixing device for fixing a surgical treatment instrument such as a brain spatula and an endoscope used when performing a surgical operation, Strengthens the holding force of the joint piece that makes up the bellows to bend the surgical treatment instrument fixed to the attachment flexibly, and when loosening the wire to change the shape of the bellows, the joint pieces join together The object is to obtain a joint piece that can be smoothly changed without changing the shape.

  In order to solve the above-mentioned problem, the joint piece for an instrument fixing device of the present invention has a spherical circular sphere part whose upper part is slightly cut horizontally, and a shape in which a cylindrical part is provided at the lower part of the circular sphere part, Inside the cylindrical part, a receiving groove for inserting the upper part of the spherical part of another joint piece is cut into a hemisphere with the same diameter as the circular part, and a number of joint pieces are connected through a wire. For this purpose, the insertion hole is cut and configured.

  According to the joint frame for an instrument fixing device of the present invention, the surgical treatment fixed to the attachment in the instrument fixing device for fixing the surgical therapeutic instrument such as a brain spatula and endoscope used when performing the surgical operation When the joint pieces composing the bellows for fixing the instrument flexibly are inserted and inserted, the upper part of the spherical part of each joint piece and the receiving groove are in surface contact with each other, and the contact area increases. The holding force can be increased, and the surgical treatment instrument fixed to the attachment at the tip of the bellows can be prevented from swinging. Further, when the wire is loosened in order to change the shape of the bellows, there is an effect that the shape change can be smoothly performed without the joint pieces being coupled to each other.

  The best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is an external view of a joint piece for an instrument fixing device according to the present invention, in which (a) is a front view and (b) is a front sectional view. As shown in the figure, the joint piece 1 used in the instrument fixing device of the present invention is provided with a spherical circular sphere part 2 whose upper part is slightly cut horizontally and a cylindrical part 3 below the circular sphere part 2. A receiving groove 5 for inserting the upper part of the circular sphere part 2 of another joint piece 1 is cut into a hemisphere with the same diameter as the circular sphere part 2 in the cylindrical part 3. At the same time, an insertion hole 4 for connecting a number of joint pieces 2 through a wire is cut and configured.

  In the above state, for example, when the upper part of the spherical portion 2 of another joint piece 1 is inserted into the receiving groove 5 in a straight line, as shown in FIG. Surface contact with the surface 5a on the circular arc of the same diameter in the receiving groove 5 will increase, and a contact area will increase. For this reason, when the wire in the bellows formed by inserting a large number of joint pieces 1 is tightened and fixed, a remarkable holding force is obtained as compared with the line contact in the conventional joint piece 6.

  FIG. 3 is a cross-sectional view of a bellows state in which a plurality of joint pieces for the instrument fixing device of the present invention are connected, and shows a state where three joint pieces 1a, 1b, 1c are connected from the left side. In this state, the upper part of the spherical part 2b of the joint piece 1b is linearly inserted into the receiving groove 5a of the joint piece 1a, and the upper part of the circular part 2c of the joint piece 1c is inserted into the receiving groove 5b of the joint piece 1b. Although it is inserted with a slight inclination, the upper part of the circular sphere portion 2 of each joint piece 1 is in surface contact with the receiving groove 5 of each joint piece 1 in any state. For this reason, even when the joint pieces 1 constituting the bellows for fixing the surgical treatment instrument fixed to the attachment are flexibly connected, the joint pieces 1 come into surface contact with each other and the contact area is large. Therefore, the holding force can be increased, and the surgical treatment instrument fixed to the attachment at the tip of the bellows can be prevented from swinging. Further, when the wire is loosened to change the shape of the bellows, the joint pieces 1 can be smoothly changed without being connected to each other.

It is an external view of the joint piece for an instrument fixing device of the present invention. It is an external view of the conventional articulated piece for an instrument fixing device. It is sectional drawing of the bellows state which connected the articulated piece for the instrument fixing device of this invention two or more.

DESCRIPTION OF SYMBOLS 1 Joint piece 2 Circular sphere part 3 Cylindrical part 4 Insertion hole 5 Receiving groove 6 Joint piece 7 Circular sphere part 8 Cylindrical part 9 Inorganic friction material 10 Insertion hole 11 Receiving groove 12 Contact part 13 Contact part

Claims (1)

  The upper part of the spherical part of another joint piece is formed in the inside of the cylindrical part. An instrument characterized in that a receiving groove for insertion is cut into a hemisphere with the same diameter as the circular sphere portion, and an insertion hole for connecting a number of joint pieces through a wire is cut. Joint piece for fixation device.

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