Source: http://www.google.com/patents/US7494499?dq=5572193
Timestamp: 2014-03-09 01:29:34
Document Index: 6417673

Matched Legal Cases: ['art 4', 'art 2', 'art 2', 'art 3', 'art 3', 'art 31', 'art 2', 'art 4', 'art 3', 'art 31', 'art 2', 'art 4', 'art 3', 'art 31', 'art 2', 'art 4', 'art 3', 'art 4', 'art 4', 'art 2', 'art 4']

Patent US7494499 - Surgical therapeutic instrument - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe disclosed invention relates to an improvement in a surgical therapeutic instrument which includes an inserting part, a manipulating part, and a therapeutic part. In a link mechanism having a transmission shaft for transmitting a driving force applied to the manipulating part to the therapeutic part,...http://www.google.com/patents/US7494499?utm_source=gb-gplus-sharePatent US7494499 - Surgical therapeutic instrumentAdvanced Patent SearchPublication numberUS7494499 B2Publication typeGrantApplication numberUS 10/367,538Publication dateFeb 24, 2009Filing dateFeb 14, 2003Priority dateFeb 15, 2002Fee statusPaidAlso published asUS20030158576Publication number10367538, 367538, US 7494499 B2, US 7494499B2, US-B2-7494499, US7494499 B2, US7494499B2InventorsToru Nagase, Katsumi SasakiOriginal AssigneeOlympus CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (24), Referenced by (4), Classifications (14), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetSurgical therapeutic instrumentUS 7494499 B2Abstract The disclosed invention relates to an improvement in a surgical therapeutic instrument which includes an inserting part, a manipulating part, and a therapeutic part. In a link mechanism having a transmission shaft for transmitting a driving force applied to the manipulating part to the therapeutic part, the position of the transmission shaft is restricted, and a joint is provided in the transmission shaft to reduce the strain of the transmission shaft. A sheath is also provided in the inserting part to facilitate cleaning thereof. A mechanism is provided for immovably locking the movable portion. A circular arc centered about a turning shaft is introduced into the shape of the manipulating part to improve the manipulability thereof. Further, the structure of a gripping portion of the manipulating part is improved.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is based upon and claims the benefit of priority from prior Japanese Patent Application Nos. 2002-039132, filed Feb. 15, 2002, 2002-039133, filed Feb. 15, 2002, 2002-039134, filed Feb. 15, 2002, and 2002-097880, filed Feb. 29, 2002, the entire contents of the applications are incorporated herein by reference.
BRIEF SUMMARY OF THE INVENTION The invention relates to an improvement in a surgical therapeutic instrument which includes an inserting part to be inserted into a body, a manipulating part provided at a proximal end of the inserting part and constructed to be gripped by an operator, and a therapeutic part provided at a distal tip of the inserting part and constructed to be manipulated by the manipulating part.
The manipulating part 4 has a first handle 37 fitted with a first grip 37 a and a second handle 39 fitted with a second grip 39 a. The inserting part 2 will be described below. FIG. 21 is a cross-sectional view taken along line 21-21 of FIG. 1. As shown in FIG. 21, a first driving rod 5, a second driving rod 6 and a third driving rod 7, each of which is a rod of small diameter, are inserted through the interior of the inserting part 2 in the state of being parallel or approximately parallel to one another. The first driving rod 5 is an element of an opening and closing link mechanism which opens and closes the therapeutic part 3, and the second driving rod 6 and the third driving rod 7 are elements of a turning link mechanism which turns the therapeutic part 3.
A mechanism which transmits the motion of the second handle 39 to the first driving rod 5 to move the first driving rod 5 back and forth will be described below. As shown in FIG. 8, the proximal portion of the first driving rod 5 is connected to one end of a connector 74 a which is movable back and forth in a groove provided in the second supporting part 31 (refer to FIGS. 15A to 15D). The other end of the connector 74 a is provided with a connector pin 75 a which extends vertically (which extends in a direction perpendicular to the axial direction of the inserting part 2 that is the direction in which the connector 74 a moves back and forth). A tip portion 71 a of a fourth driving rod 71 is rightwardly and leftwardly turnably connected to the connector pin 75 a. The fourth driving rod 71 has the tip portion 71 a, an adjusting member 76 a for adjusting the entire length of the fourth driving rod 71, a reinforcing member 77 a and a proximal portion 71 b in named order from the tip of the fourth driving rod 71. In this manner, the first driving rod 5 and the fourth driving rod 71 constitute a transmission shaft which can be moved back and forth to transmit the manipulation force of the manipulating part 4 to the therapeutic part 3. This transmission shaft is given the degree of freedom that allows the transmission shaft to turn in (to the right or left) at a joint realized by the connector pin 75 a, and is also capable of coping with both the case in which the direction of transmission is not linear and the case in which the direction of transmission is variable.
A mechanism which transmits the motion of the first handle 37 to the second driving rod 6 and the third driving rod 7 to move the second driving rod 6 and the third driving rod 7 back and forth will be described below. As shown in FIG. 7, the proximal portion of the second driving rod 6 is connected to one end of a connector 74 b which is movable back and forth in the groove provided in the second supporting part 31 (refer to FIGS. 14A to 14D). The other end of the connector 74 b is provided with a connector pin 75 b which extends vertically (which extends in a direction perpendicular to the axial direction of the inserting part 2 that is the direction in which the connector 74 b moves back and forth). A tip portion 72 a of a fifth driving rod 72 is rightwardly and leftwardly turnably connected to the connector pin 75 b. The fifth driving rod 72 has the tip portion 72 a, an adjusting member 76 b for adjusting the entire length of the fifth driving rod 72, a reinforcing member 77 b and a proximal portion 72 b in named order from the tip of the fifth driving rod 72. In this manner, the second driving rod 6 and the fifth driving rod 72 constitute a transmission shaft which can be moved back and forth to transmit the manipulation force of the manipulating part 4 to the therapeutic part 3. This transmission shaft is given the degree of freedom that allows the transmission shaft to turn in (to the right or left) at a joint realized by the connector pin 75 b, and is also capable of coping with both the case in which the direction of transmission is not linear and the case in which the direction of transmission is variable.
The proximal portion of the third driving rod 7 is connected to one end of a connector 74 c which is movable back and forth in the groove provided in the second supporting part 31 (refer to FIGS. 14A to 14D). The other end of the connector 74 c is provided with a connector pin 75 c which extends vertically (which extends in a direction perpendicular to the axial direction of the inserting part 2 that is the direction in which the connector 74 c moves back and forth). A tip portion 73 a of a sixth driving rod 73 is rightwardly and leftwardly turnably connected to the connector pin 75 c. The sixth driving rod 73 has the tip portion 73 a, an adjusting member 76 c for adjusting the entire length of the sixth driving rod 73, a reinforcing member 77 c and a proximal portion 73 b in named order from the tip of the sixth driving rod 73. In this manner, the third driving rod 7 and the sixth driving rod 73 constitute a transmission shaft which can be moved back and forth to transmit the manipulation force of the manipulating part 4 to the therapeutic part 3. This transmission shaft is given the degree of freedom that allows the transmission shaft to turn in (to the right or left) at a joint realized by the connector pin 75 c, and is also capable of coping with both the case in which the direction of transmission is not linear and the case in which the direction of transmission is variable.
The construction of a handle fixing mechanism provided on the top of the manipulating part 4 will be described below. As shown in detail in FIGS. 22A, 22B, 23A and 23B, the manipulating part 4 is provided with a handle fixing mechanism 91 which serves as a turn restricting part for restricting (fixing) the turn of each of the handles 37 and 39. The handle fixing mechanism 91 has, as elements provided on the first handle 37 having the first grip 37 a, a slide lever (manipulating lever) 92, a slide key 96 connected to the slide lever 92, and a slide housing 94 in which the slide key 96 is accommodated in the state of being movable back and forth. The handle fixing mechanism 91 further has a pair of housing pins 95 a and 95 b protruded from the slide housing 94 toward the slide lever 92 and spaced apart from each other in the direction in which the slide lever 92 moves, and one lever groove 93 provided on the bottom of the slide lever 92 and capable of engaging with and disengaging from the housing pins 95 a and 95 b. The distal tip side of the handle fixing mechanism 91 has, as elements fixedly provided on a guard 56 (on the proximal side of the inserting part 2), a key accommodating housing 97, and a key accommodating portion 98 provided on the proximal side of the key accommodating housing 97 and constructed to accommodate the distal tip portion of the slide key 96.
For example, in the case where a so-called needle handling manipulation for sticking and extracting a needle into and from a living tissue while holding the needle with the surgical therapeutic instrument 1 placed in the attitude shown in FIG. 12 is to be executed in the longitudinal axial direction of the surgical therapeutic instrument 1, the sticking angle of the needle may not suffice in the case of general non-twisted gripping surfaces of the type used in the first embodiment. In this case, the needle handling manipulation can be executed efficiently and easily, by appropriately setting the twist angle of each of the gripping surfaces 1012 a and 1014 a. Actually, it is desirable to set a twist angle of �45 degrees, preferably, approximately �20 to �30 degrees (the (+) and (−) signs are signs to be selected according to, for example, whether the operator manipulates the surgical therapeutic instrument with the right hand or the left hand).
FIGS. 38 to 40 show the external appearance of the entire surgical therapeutic instrument according to the seventh embodiment. FIG. 41 shows the external appearance of the manipulating part 4 according to the seventh embodiment. As shown in FIG. 41, the first handle 37 has the first grip 37 a. The first grip 37 a has a first grip base 37 b and a first grip leg 37 c. The first grip base 37 b has a side shape formed by an ellipse which is partly cut away, and the center of the first grip base 37 b (the center of the ellipse) coincides with the third pivotal pin 35 which is a pivotal shaft for upward and downward turns. The first grip leg 37 c extends beyond the side shape of the first grip base 37 b. The second handle 39 has the second grip 39 a. A handle opening spring 81 and a ratchet 82 are provided between the first grip leg 37 c and the second grip 39 a. The handle opening spring 81 urges the second grip 39 a in an opening direction with respect to the first grip leg 37 c, and the ratchet 82 fixes the second grip 39 a at a constant opening angle with respect to the first grip leg 37 c. The first grip leg 37 c has a lever 83 for arbitrarily releasing the engagement of the ratchet 82, and a ratchet disengaging lever 84 for disengaging the mechanism of the ratchet 82 to keep the ratchet mechanism constantly inactive.
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