Source: https://patents.google.com/patent/US7476237B2/en
Timestamp: 2019-07-16 01:16:02
Document Index: 41535042

Matched Legal Cases: ['art 51', 'arts 24', 'arts 24', 'art 51', 'art 51', 'art 51']

US7476237B2 - Surgical instrument - Google Patents
US7476237B2
US7476237B2 US10/784,634 US78463404A US7476237B2 US 7476237 B2 US7476237 B2 US 7476237B2 US 78463404 A US78463404 A US 78463404A US 7476237 B2 US7476237 B2 US 7476237B2
US10/784,634
US20040193212A1 (en
2003-02-27 Priority to JP2003-051851 priority Critical
2003-02-27 Priority to JP2003051850A priority patent/JP4331490B2/en
2003-02-27 Priority to JP2003051851A priority patent/JP2004255082A/en
2003-02-27 Priority to JP2003-051850 priority
2003-02-27 Priority to JP2003-051849 priority
2003-02-27 Priority to JP2003051849A priority patent/JP2004255080A/en
2004-02-23 Assigned to OLYMPUS CORPORATION reassignment OLYMPUS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAGASE, TORU, TANIGUCHI, KAZUNORI
2004-02-23 Application filed by Olympus Corp filed Critical Olympus Corp
2004-09-30 Publication of US20040193212A1 publication Critical patent/US20040193212A1/en
2009-01-13 Publication of US7476237B2 publication Critical patent/US7476237B2/en
The first connection member 25 is formed of a plate-shaped rigid material. The second connection member 26 is also formed of a rigid material. As shown in FIG. 4A, the second connection member 26 has an H-like shape in cross section, and recessed parts are formed on both end portions thereof. A flat plate-shaped distal end part 51 a formed on the distal end of the end effector manipulation rod 51 is connected with the recessed part on the proximal end of the second connection member 26 by the third connection pin 10 c. On the other hand, the proximal end of the first connection member 25 is connected with the recessed part on the head of the second connection member 26 by the second connection pin 10 b.
The distal end cover 24 has a pair of cover projection parts 24 b. The pair of proximal-end projections 23 a and the second connection member 26 are disposed between the cover projection parts 24 b. Note that the proximal-end projections 23 a are formed on the proximal end of the end effector base 23.
The distal end unit 52 a of the end effector base manipulation rod 52 is connected with the proximal end of the end effector base 23 by the second pivot pin 8 b. The second pivot pin 8 b is disposed parallel to the first pivot pins 8 a.
The end effector base manipulation rod 52 is disposed in a cutout channel 24 c formed at a particular location in the distal end cover 24. The location of the second pivot pin 8 b in the state shown in FIG. 4B is referred to as a zero pivot end, while the location of the second pivot pin 8 b represented by a solid line in FIG. 5 is referred to as a maximum pivot end.
The proximal end of the first jaw 21 is pivotably connected to the distal end of the first connection member 25 by the first connection pin 10 a. Side faces 25 a and 25 b of the first connection member 25 are in contact with contact faces 23 c and 23 d of the end effector base 23. Thus, the first connection member 25 moves longitudinally in the end effector base 23 in a direction parallel to the contact faces 23 c and 23 d.
The other end of the first connection member 25 is located in the recess of the distal end of the second connection member 26. The first connection member 25 and the second connection member 26 are connected with each other via the second connection pin 10 b.
On the other hand, the flat plate-shaped distal end part 51 a of the end effector manipulation rod 51 is located in the recess of the distal end part of the second connection member 26. The end effector manipulation rod 51 and the second connection member 26 are connected with each other via the third connection pin 10 c.
A circular-shaped restriction ring 68 for supporting the flange 66 a is disposed in a large-diameter hole 62 b of the stepped hole. The restriction ring 68 is integrally fixed to the pivot control knob 62 by fixing screws 94. The restriction ring 68 restricts the motion of the pivot control knob 62 in a direction along the axis of the insertion portion 3 although the pivot control knob 62 is allowed to rotate with respect to the flange 66 a.
An internal thread 62 c is formed in the channel of the pivot control knob 62. An external thread 61 b is formed on the proximal end part of the pivot base 61. The external thread 61 b and the internal thread 62 c are screwed together thereby connecting the pivot control knob 62 and the pivot base 61 with each other.
In order that the pivot control knob 62 can be easily rotated with a finger of one hand with which the surgical instrument 1 is held to move the pivot base 61 in a forward or backward direction, the pivot control knob 62 is formed so as to have a greater diameter than that of the rotation knob 63, a small-diameter hole 62 a is formed such that its depth is greater by a particular amount than the thickness of the flange 66 a, and a stepped portion is formed on the bottom of the small-diameter hole 62 a of the pivot control knob 62 so as to minimize the contact area between the flange 66 a and the bottom surface of the small-diameter hole 62 a.
Thus, the grasp control portion 4 represented by a two-dash line in FIG. 10 can be attached and removed by operating the button 73 of the release button 70 thereby changing the location of the locking hook 71 a.
As shown in FIGS. 3A, 3B, 4A, and 4B, when the end effector 2 is in a non-pivoted position in which the end effector 2 and the insertion portion 3 are in a straight line, and when the first jaw 21 and the second jaw 22 forming the end effector 2 are in a closed state, if the pivot control knob 62 is rotated about the insertion axis, for example, in a direction denoted by an arrow d shown in FIG. 14 (or in a direction denoted by an arrow c), the end effector 2 is pivoted as will be described detail below. Note that the pivot control knob 62 can be easily rotated with a finger of one hand with which the end effector manipulation portion 40 is held, because the pivot control knob 62 is disposed closely adjacent, at a distal-end side, to the rotation knob 63 and the pivot control knob 62 is greater in diameter than the rotation knob 63. If the pivot control knob 62 is rotated, the pivot base 61 connected, by means of screwing, with the pivot control knob 62 moves forwardly along the insertion axis by an amount corresponding to the amount by which the pivot control knob 62 is rotated. The motion of the pivot base 61 in the forward direction causes the end effector base manipulation rod 52 integrally fixed by the connection screw 67 with the pivot base 61 to move forwardly, as shown in FIG. 15. As a result, the location of the connection screw 67 changes within the long hole 64 a.
The motion of the end effector base manipulation rod 52 in the forward direction causes the distal end unit 52 a to move forwardly as shown in FIG. 16. As a result, the second pivot pin 8 b moves forwardly, and thus the end effector base 23, on which the first jaw 21 and the second jaw 22 are disposed, pivots on the first pivot pin 8 a. Thus, the pivot angle gradually changes.
In the present embodiment, to avoid the above problem, the structure is designed such that when the flat plate-shaped distal end part 51 a of the end effector manipulation rod 51 moves by L2, the first jaw 21 and the second jaw 22 are fully opened, and the pin-to-pin distance equals to L2. Thus, when the first jaw 21 and the second jaw 22 are in the closed state, the center of the second connection pin 10 b is coincident with the center of the first pivot pin 8 a, while the center of the third connection pin 10 c is coincident with the center of the first pivot pin 8 a when the first jaw 21 and the second jaw 22 are in the open state. Thus, in the present embodiment, when the end effector 2 is pivoted to any angle within a particular range, for example, from 0° to 60°, the angle between the first jaw 21 and the second jaw 22 is maintained constant as indicated by the solid line in FIG. 20.
As shown in FIGS. 26 and 27, in the surgical instrument 1 according to the present embodiment, a first slanting contact surface 26 c and a second slanting contact surface 26 d are provided in the center of the second connection member 26A. Accordingly, the end face of the proximal end part of the first connection member 25 is in contact with the first slanting contact surface 26 c. The head-side end face of the flat plate-shaped distal end part 51 a disposed on the distal end of the end effector manipulation rod 51 is in contact with the second slanting contact surface 26 d.
When the end effector 2A is in a pivoted position, if the end effector manipulation rod 51 is moved forwardly to push up the first connection member 25 via the second connection member 26A, the direction of a resistive force, which is in a direction normal to the first slanting contact surface 26 c in this case, becomes closer to the main axis of the end effector 2, which results in a reduction in resistance. When the end effector 2A is in a pivoted position and the first jaw 21 and the second jaw 22 are in an open state, if the first jaw 21 and the second jaw 22 are closed by an external force and thus the second connection member 26A is pushed down by the first connection member 25 and the end effector manipulation rod 51 is moved backwardly toward the proximal end, the direction of a resistive force, which is in a direction normal to the first slanting contact surface 26 c in this case, becomes closer to the main axis of the end effector manipulation rod 51, which results in a reduction in resistance.
US10/784,634 2003-02-27 2004-02-23 Surgical instrument Active 2027-01-11 US7476237B2 (en)
JP2003051850A JP4331490B2 (en) 2003-02-27 2003-02-27 Surgical instrument
JP2003051851A JP2004255082A (en) 2003-02-27 2003-02-27 Surgical treatment appliance
JP2003-051850 2003-02-27
JP2003-051849 2003-02-27
JP2003051849A JP2004255080A (en) 2003-02-27 2003-02-27 Surgical treatment appliance
JP2003-051851 2003-02-27
US20040193212A1 US20040193212A1 (en) 2004-09-30
US7476237B2 true US7476237B2 (en) 2009-01-13
ID=32995586
US10/784,634 Active 2027-01-11 US7476237B2 (en) 2003-02-27 2004-02-23 Surgical instrument
US (1) US7476237B2 (en)
US1359391A (en) * 1917-10-31 1920-11-16 Landymore James William Coupling device
2004-02-23 US US10/784,634 patent/US7476237B2/en active Active
US20040193212A1 (en) 2004-09-30
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TANIGUCHI, KAZUNORI;NAGASE, TORU;REEL/FRAME:015019/0443;SIGNING DATES FROM 20040210 TO 20040212