WO2023176925A1 - Pinces - Google Patents

Pinces Download PDF

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Publication number
WO2023176925A1
WO2023176925A1 PCT/JP2023/010311 JP2023010311W WO2023176925A1 WO 2023176925 A1 WO2023176925 A1 WO 2023176925A1 JP 2023010311 W JP2023010311 W JP 2023010311W WO 2023176925 A1 WO2023176925 A1 WO 2023176925A1
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WO
WIPO (PCT)
Prior art keywords
arm
claw
lever
forceps
tip
Prior art date
Application number
PCT/JP2023/010311
Other languages
English (en)
Japanese (ja)
Inventor
仁 平田
秀 栗本
知博 大竹
数磨 中村
Original Assignee
ニプロ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニプロ株式会社 filed Critical ニプロ株式会社
Publication of WO2023176925A1 publication Critical patent/WO2023176925A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps

Definitions

  • the present invention relates to forceps used, for example, in surgery or treatment.
  • Patent Document 1 proposes a forceps for fracture treatment that can pinch and fix fractured bone fragments in order to treat fractured bones.
  • the two arms each have an intersection, and intersect with each other at the two intersections.
  • the two arms are rotatably supported in forward and reverse directions around a rotation axis passing through the two intersections. That is, in the forceps of Patent Document 1, the two arms are opened and closed as they rotate forward and backward in a plane parallel to the plane around the rotation axis. Since the two arms are used in the same way as gripping scissors, two finger rings into which, for example, the thumb and middle finger can be inserted, are inserted in a direction that intersects a plane parallel to the plane around the axis of rotation.
  • a ratchet lever which has a claw that can be operated by the ring finger or little finger, is rotatably supported on the arm near the ring where the middle finger of one of the two arms is inserted, and is attached to the outside of the forceps. It is arranged so that it protrudes towards the Further, the other arm has another ring that protrudes from between the intersection of the other arm and the finger ring to beyond the intersection of the one arm and the finger ring, and that can engage with the pawl of the ratchet lever.
  • An arcuate band-shaped member having a claw portion is arranged.
  • the opening and closing angles of the two arms are adjusted by opening and closing the two arms, rotating the ratchet lever around the fulcrum, and engaging the claws with each other.
  • the angle can be maintained at the desired angle.
  • by rotating the ratchet lever in the opposite direction around the fulcrum and releasing the engagement between the claws the holding of the opening/closing angle of the two arms is released, and the opening/closing operations of the two arms are made possible. Become.
  • Patent Document 2 proposes forceps that can grip disinfectant cotton balls and the like.
  • the two arms each have an intersection, and intersect with each other at the two intersections.
  • the two arms are rotatably supported in forward and reverse directions around a rotation axis passing through the two intersections. That is, in the forceps of Patent Document 2, the two arms are opened and closed as they rotate forward and backward in a plane parallel to the plane around the rotation axis. Since the two arms are used in the same way as gripping scissors, the two arms have finger rings into which, for example, the thumb and middle finger can be inserted in a direction crossing a plane parallel to the plane around the axis of rotation. provided at each end.
  • the forceps of Patent Document 2 is provided with a claw member having a claw portion on one arm, protruding from between the intersection portion of one arm and the finger ring portion of the other arm, and protruding from between the intersection portion of the other arm and the finger ring portion. It is being Further, in the other arm, a claw portion that protrudes from between the intersection portion of the other arm and the finger ring portion toward between the intersection portion of the one arm and the finger ring portion, and that can engage with the claw portion of the one arm. Another pawl member is provided having a. That is, in the forceps of Patent Document 2, the two claws are arranged between the two arms.
  • the forceps of Patent Document 1 if you are right-handed, you can insert the thumb of your right hand into the ring part of the other arm, insert your middle finger into the ring part of one arm, and put your ring finger or little finger on the ratchet lever. Operate the ratchet lever. That is, the forceps of Patent Document 1 is configured to be operated by a right-handed person with the right hand, and the claws are engaged with each other on the side closer to the ring finger and little finger than the thumb and middle finger of the right hand holding the forceps. Each claw part is provided.
  • the claws are engaged with each other between the two arms in a plane parallel to a plane around the rotation axis related to the opening/closing operation of the two arms.
  • the forceps of Patent Document 2 whether the forceps are operated with the right hand of a right-handed person or the left hand of a left-handed person, the thumb and middle finger are inserted into the ring part, and the opening and closing operations of the two arms are performed.
  • the claw portions are engaged with each other between the thumb and middle finger in a plane parallel to the plane around the rotation axis. Therefore, with the forceps of Patent Document 2, the operability of the forceps is the same regardless of whether the person operating the forceps is right-handed or left-handed, and the difference in operability is reduced.
  • the forceps of Patent Document 2 uses two fingers that open and close the two arms in a plane parallel to the plane around the rotation axis when disengaging the claws from each other. It is necessary to twist the two arms so that they intersect the plane.
  • the fingers of the hand operating the forceps can smoothly rotate in a plane parallel to the plane around the rotation axis, but in a plane parallel to the plane around the rotation axis.
  • it is difficult to perform an intersecting twisting motion so it is difficult to perform an engagement release motion. That is, even with the forceps of Patent Document 2, there is still room for improvement in the operability of the forceps.
  • an object of the present invention is to solve the above-mentioned problems, and to reduce the difference in operability regardless of whether the operator is right-handed or left-handed, and to improve the engagement when adjusting the angle of opening and closing operations. It is an object of the present invention to provide forceps whose release action is also easy to operate.
  • a forceps includes: It has a first base end portion and a first tip end portion, a first finger ring portion is provided at the first base end portion, and a first rotating portion is provided between the first base end portion and the first tip end portion.
  • a first arm having a support portion; It has a second proximal end portion and a second distal end portion opposite to the first distal end portion, a second finger ring portion is provided on the second proximal end portion, and a second arm having a second rotation support part that overlaps the first rotation support part in the middle between the two tip parts; Equipped with The first arm is capable of forward and reverse rotation in a plane parallel to a plane around the rotation axis in the first rotation support part, The second arm is capable of forward and reverse rotation in a plane parallel to a plane around the rotation axis in the second rotation support part, The first rotational support of the first arm in a closed state in which the first tip and the second tip are close to each other due to opening and closing operations accompanying forward and reverse rotation of the first arm and the second arm.
  • One side faces the first rotation support part, the other of the inner peripheral edge and the outer peripheral edge faces the first proximal end part, and a plurality of a first claw member provided with one claw portion;
  • a second claw portion capable of engaging with at least one of the plurality of first claw portions is provided, and is disposed between the second rotation support portion and the second base end portion of the second arm;
  • a second claw movable between an engagement position where the first claw part and the second claw part are engaged with each other and an engagement release position where the first claw part and the second claw part are disengaged from each other.
  • a claw member One end is connected to the second arm, and the other end is connected so as to apply a biasing force to the second claw member and engage the first claw part and the second claw part, so that the first arm and the second claw member are connected to each other.
  • an elastic member that maintains the opening/closing angle with the second arm; connected to the second claw member and moving the second claw member from the engaged position to the disengaged position in a plane parallel to a plane around the rotating shaft against the urging force of the elastic member; With a lever that can be moved to It further includes:
  • the forceps according to one aspect of the present invention are the forceps according to the above aspect, wherein the first tip part and the second tip part are capable of being crimped onto an object to be crimped. .
  • the first claw part and the second claw part are disengaged from each other in a plane parallel to a plane around the rotation axis related to the rotation of the first arm and the second arm.
  • a lever that moves the two-claw member is movable. Therefore, regardless of whether the person operating the forceps is right-handed or left-handed, for example, when operating the opening/closing operation of the first arm and the second arm with the thumb and ring finger, the By moving the lever within the plane with your index finger instead of twisting it in a direction intersecting the plane, the claws can be disengaged from each other.
  • the engagement between the first claw part and the second claw part can be achieved by moving the lever within the plane in which the two arms open and close, without having to perform a twisting action like the forceps in Patent Document 2. It can be canceled. Therefore, the engagement release operation is easy to operate. Therefore, the forceps according to the aspect of the present invention has little difference in operability regardless of whether the operator is right-handed or left-handed, and the engagement release operation when adjusting the angle of the opening and closing operation is also easy to operate. .
  • FIG. 1 is a diagram showing crimping forceps according to a first embodiment of the present invention.
  • FIG. 1 is a partially enlarged view showing a part of the crimping forceps according to the first embodiment of the present invention.
  • FIG. 2 is a partially enlarged view showing a further enlarged part of the crimping forceps according to the first embodiment of the present invention.
  • FIG. 2 is a diagram illustrating the engagement operation of the crimping forceps according to the first embodiment of the present invention, in which the first arm and the second arm are operated to adjust the opening/closing angle to a desired angle, and the crimping forceps are crimped onto the object to be crimped.
  • FIG. 4 is a diagram illustrating the engagement operation of the crimping forceps according to the first embodiment of the present invention, in which the first arm and the second arm are relative to each other from a state where the opening/closing angle is wider than the desired opening/closing angle shown in FIG. A diagram showing a state in which the desired opening/closing angle is reached after closing.
  • FIG. 5 is a diagram illustrating the engagement release operation of the crimping forceps according to the first embodiment of the present invention, and is a partially enlarged view showing a part of the crimping forceps in the operation of opening the opening/closing angle from the closed state shown in FIG.
  • FIG. 4 The figure which shows the crimping forceps based on the 1st modification of 1st Embodiment of this invention.
  • FIG. 7 is a partially enlarged view showing a part of the crimping forceps according to the second embodiment of the present invention.
  • the partial enlarged view which further expands and shows a part of the crimping forceps based on 2nd Embodiment of this invention.
  • FIG. 7 is a diagram illustrating the engagement release operation of the crimping forceps according to the second embodiment of the present invention, and is a partially enlarged view showing a part of the crimping forceps in an enlarged manner.
  • FIG. 1 is a diagram showing forceps according to a first embodiment of the present invention.
  • FIG. 2A is an enlarged view showing a part of the forceps according to the first embodiment of the present invention.
  • FIGS. 1 and 2A show an example in which the forceps according to the first embodiment of the present invention are crimping forceps.
  • the shape of the tip part of the crimping forceps shown in FIG. 1 is spherical
  • the shape of the tip part of general forceps is not limited to the spherical shape. In general forceps, the shape of the tip part has various shapes, such as needle-like, depending on the purpose of the forceps.
  • the crimping forceps 1 includes a first arm 10 and a second arm 20.
  • the first arm 10 and the second arm 20, in which the first tip 16 of the first arm 10 and the second tip 26 of the second arm 20, which will be described later, are closest are relatively closed.
  • the direction of a straight line passing through the hinge portion 14a where the first arm 10 and the second arm 20 intersect is defined as the longitudinal direction of the first arm 10 and the second arm 20. Let it be L. Further, this virtual straight line is defined as the central axis when the first arm 10 and the second arm 20 are in a relatively closed state.
  • one longitudinal end of the first arm 10 is the first proximal end 13 and the distal end thereof is the first distal end 16.
  • one end side in the longitudinal direction of the second arm 20 is the second base end portion 23, and the distal end side is the second distal end portion 26.
  • the straight line includes a substantially straight line.
  • the first arm 10 has a first base end 13 at one end in the longitudinal direction of the first arm 10, and a first tip end 16 at the other end.
  • the second arm 20 has a second base end 23 at one end in the longitudinal direction of the second arm 20, and a second tip end 26 at the other end.
  • the first arm 10 and the second arm 20 each have a first intersection 14 which is an example of a first rotation support part located intermediate in the longitudinal direction, and a second intersection part 24 which is an example of a second rotation support part. They intersect in an X-shape.
  • the first arm 10 is composed of two members. Specifically, the first arm 10 includes a first proximal end member 11 having a first proximal end portion 13 supported by an operator's hand at one end, and a first proximal end member 11 having a first proximal end portion 13 supported by an operator's hand at one end, and a first proximal end member 11 having a first proximal end portion 13 supported by an operator's hand at one end, and a first proximal end member 11 having a first proximal end portion 13 supported by an operator's hand, and a first proximal end member 11 having a first proximal end portion 13 supported by an operator's hand at one end.
  • the first tip side member 12 is composed of a first tip side member 12 having a first tip 16 that holds the body therebetween.
  • the first proximal end member 11 is made of, for example, a metal such as stainless steel (SUS) that has a rigidity comparable to that of stainless steel (SUS).
  • the first tip side member 12 is made of, for example, a carbon material or a resin such as a polyetheretherketone (PEEK) material.
  • the first proximal end member 11 is made of metal such as stainless steel (SUS), but the present embodiment is not limited thereto.
  • the first proximal end member 11 may be made of a material having a rigidity comparable to or higher than that of stainless steel (SUS).
  • the first tip side member 12 is made of a resin such as a carbon material or a polyether ether ketone (PEEK) material, but in this embodiment It is not limited to this.
  • the first proximal end member 11 may be made of resin that can transmit X-rays.
  • the first proximal end member 11 connects the first proximal end portion 13 to the first intersecting point in order from the first proximal end portion 13 side to the first distal end portion 16 side along the longitudinal direction of the first arm 10. It has a continuous portion 14 and a first extension portion 15.
  • the first proximal end 13 is perpendicular to the longitudinal direction of the first arm 10, and in the paper of FIG.
  • a first finger ring portion 13a is provided which has an oval ring shape into which the ring finger of the left hand of a left-handed person can be inserted.
  • orthogonal includes substantially orthogonal.
  • the crimping forceps 1 is stabilized by placing the little finger on the outer circumferential edge of the first finger ring part 13a extending in the longitudinal direction of the first arm 10, for example, on the same side as the ring finger to be inserted into the first finger ring part 13a.
  • a proximal finger rest portion 13b is provided so that the device can be operated.
  • first base end portion 13 extends straight toward the first tip end portion 16 along the longitudinal direction of the first arm 10 when the first arm 10 and the second arm 20 are relatively closed. , has a stopper portion 13c that stops the movement of a protruding portion 23b of the second arm 20, which will be described later.
  • straight includes substantially straight.
  • the first intersection part 14 is provided continuously at the stopper part 13c, that is, the tip of the first base end part 13, and the first arm 10 and the second arm 20 intersect in an X shape, and the second arm 20 It overlaps with the second intersection 24 of.
  • the first proximal end member 11 has a hinge portion 14a that rotatably supports the second arm 20 at the first intersection portion 14.
  • the hinge part 14a is fixed to the first intersection part 14 of the first arm 10 so that the hinge pin 14b stands up from the first arm 10, and the hinge pin 14b penetrates the second arm 20 so as to be rotatable with respect to the first arm 10.
  • the head 14c of the hinge pin 14b is crushed to prevent it from coming off in the axial direction. With this configuration, the first arm 10 and the second arm 20 can relatively rotate forward and backward within a plane parallel to the plane around the axis of the hinge pin 14b.
  • the first extension portion 15 is provided substantially parallel to the stopper portion 13c of the first proximal end member 11.
  • the distal end side of the first extension portion 15 has a straight prismatic shape, and is accommodated in a second connecting end portion 17 (described later) of the first distal end side member 12 and connected to the first base end side member 11.
  • a first connecting end 15a is provided that connects the first tip end side member 12 so as to be removable. That is, the first tip side member 12 connected to the first base side member 11 is replaceable.
  • the first connection end 15a is provided with a screw hole (not shown) in order to stably connect the first distal side member 12 to the first proximal side member 11 so as to be removable.
  • the first distal end member 12 includes a second connecting end 17 and an upper support portion 12a in order from the proximal end side to the distal end side of the first distal end member 12 along the longitudinal direction of the first arm 10. and the first tip 16 are continuous.
  • the second connecting end 17 has a straight rectangular cylindrical shape that accommodates the first connecting end 15a of the first proximal end member 11 and can be connected to the first connecting end 15a.
  • two counterbore holes 18 are provided on the surface of the second connection end 17, corresponding to the two screw holes of the first connection end 15a. That is, in the connection between the first proximal end member 11 and the first distal end member 12, the first connecting end 15a is housed inside the second connecting end 17, so that the second connecting end The two counterbore holes 18 of 17 are aligned with the two screw holes of the first connection end 15a.
  • the first connecting end 15a has a straight prismatic shape
  • the second connecting end 17 has a shape that accommodates the first connecting end 15a and extends beyond the first connecting end.
  • the shape is a straight rectangular tube that can be connected to the portion 15a, the present embodiment is not limited to this.
  • the shape of the first connecting end 15a is a straight cylinder
  • the shape of the second connecting end 17 is a straight cylinder that can accommodate the first connecting end 15a and connect to the first connecting end 15a. It may be in the shape of
  • the second connection end 17 having a rectangular tube shape accommodates the first connection end 15a having a prismatic shape and is connected to the first connection end 15a.
  • the present embodiment is not limited to this.
  • the first connecting end 15a having a cylindrical shape may accommodate and be connectable to the second connecting end 17 having a columnar shape.
  • the first proximal end member 11 and the first distal end member 12 are connected to each other by two screws so as to be able to come into contact with and separate from them. It is not limited to this.
  • the first proximal end member 11 and the first distal end member 12 may be removably connected to each other by, for example, one screw or three or more screws.
  • the first proximal end member 11 and the first distal end member 12 are connected to each other with a screw so that they can be connected to and separated from each other, but the present embodiment is limited to this. Not done.
  • the first proximal end member 11 and the first distal end member 12 may be removably connected to each other by a known fitting means other than screws.
  • the upper support portion 12a is provided continuously to the second connection end portion 17.
  • the shape of the upper support portion 12a is, for example, as shown in FIG. It has a U-shape convex upward in the plane of the paper.
  • the U-shape includes a substantially U-shape.
  • the first tip side member 12 has a U-shape convex upward in the plane of the paper of FIG. 1, but the present embodiment is not limited to this.
  • the shape of the first tip side member 12 may be any shape as long as it is convex upward in the plane of the paper of FIG. 1, and may be, for example, a V-shape that is convex upward in the plane of the paper of FIG.
  • the V-shape includes a substantially V-shape.
  • the first tip portion 16 is provided continuously to the upper support portion 12a.
  • the first tip portion 16 is provided so as to protrude downward in the paper plane of FIG. 1 from the upper support portion 12a.
  • the shape of the first tip 16 is such that it can be inserted into a hole provided in a first object to be crimped (not shown), such as a guide block stacked on a plate that fixes the radius. It has a spherical shape that allows the first object to be pressed to be pressed against the arm.
  • the first tip 16 has a spherical shape, but in general forceps, the first tip 16 is not limited to a spherical shape.
  • the first tip side member 12 can be replaced so that the first tip 16 has various shapes depending on the purpose of the forceps.
  • the second arm 20 is composed of two members. Specifically, the second arm 20 includes a second proximal end member 21 having a second proximal end portion 23 supported by an operator's hand at one end, and a second proximal end member 21 having a second proximal end portion 23 supported by an operator's hand at one end, and a second proximal end member 21 having a second proximal end portion 23 supported by an operator's hand at one end, and a second proximal end member 21 having a second proximal end portion 23 supported by an operator's hand, and a second proximal end member 21 having a second proximal end portion 23 supported by an operator's hand at one end.
  • the second proximal end member 21 is made of, for example, a metal such as stainless steel (SUS) that has a rigidity comparable to that of stainless steel (SUS).
  • the second tip side member 22 is made of, for example, a carbon material or a resin such as a polyetheretherketone (PEEK) material.
  • the second proximal end member 21 is made of metal such as stainless steel (SUS), but the present embodiment is not limited thereto.
  • the second proximal end member 21 may be made of a material having a rigidity comparable to or higher than that of stainless steel (SUS).
  • the second tip side member 22 is made of a resin such as a carbon material or a polyether ether ketone (PEEK) material, but in this embodiment It is not limited to this.
  • the second proximal end member 21 may be made of resin that can transmit X-rays.
  • the second proximal end member 21 connects the second proximal end portion 23 to a second intersection in order from the second proximal end portion 23 side to the second distal end portion 26 side along the longitudinal direction of the second arm 20. It has a continuous portion 24 and a second extension portion 25.
  • the base end of the second base end portion 23 is perpendicular to the longitudinal direction of the second arm 20, and in the paper of FIG.
  • a second finger ring portion 23a is provided at the back right corner, which is an oval ring shape into which the thumb of the left hand of a left-handed person can be inserted.
  • orthogonal includes substantially orthogonal.
  • the second base end portion 23 extends straight toward the second tip end portion 26 along the longitudinal direction of the second arm 20 when the first arm 10 and the second arm 20 are relatively closed. , has a substantially triangular plate-shaped protrusion 23b that protrudes toward the stopper part 13c of the first arm 10 at the base end.
  • two horizontal L-shaped plates are arranged in parallel along the longitudinal direction L in FIG.
  • a groove portion 23d is provided so as to branch into two.
  • a rotation angle adjustment mechanism 50 which will be described later, enters this groove portion 23d to perform angle adjustment operation.
  • the L-shape includes a substantially L-shape.
  • the protruding end of the protruding part 23b closes the closed position regulating part 23c. This contacts the stopper portion 13c of the first arm 10 to regulate the closed position.
  • the second intersection part 24 is provided continuously at the tip of the second base end part 23, and the first arm 10 and the second arm 20 intersect in an X shape, and the first intersection part 14 of the first arm 10 It overlaps with A curved portion that is convex toward the upper left in the plane of the paper of FIG.
  • the second intersection 24 has a lever 40, which will be described later, that protrudes perpendicularly to a plane parallel to the plane around the axis of the hinge pin 14b and on the opposite side of the first arm 10 with respect to the second arm 20.
  • Engaging protrusions 41 are provided. Furthermore, as described above, the hinge pin 14b of the hinge portion 14a that rotatably supports the second arm 20 passes through the second intersection 24.
  • the second extension portion 25 is provided substantially parallel to the second base end portion 23 of the second base end side member 21 .
  • the distal end side of the second extension portion 25 has a straight prismatic shape, and is accommodated in a fourth connecting end portion 27 (described later) of the second distal end side member 22 and connected to the second base end side member 21.
  • a third connecting end 25a is provided that connects the second tip end side member 22 so as to be removable. That is, the second tip side member 22 connected to the second base side member 21 is replaceable.
  • the third connecting end 25a is provided with a screw hole (not shown) in order to stably connect the second distal end member 22 to the second proximal end member 21 so as to be removable.
  • the second distal end member 22 is connected to a fourth connecting end 27 and a lower support portion in order from the proximal end side to the distal end side of the second distal end member 22 along the longitudinal direction of the second arm 20. 22a and the second tip 26 are continuous.
  • the fourth connecting end 27 has a straight square tubular shape that accommodates the third connecting end 25a of the second proximal end member 21 and can be connected to the third connecting end 25a.
  • the surface of the fourth connection end 27 is provided with two counterbore holes (not shown) corresponding to the two screw holes of the third connection end 25a. That is, in the connection between the second proximal end member 21 and the second distal end member 22, the third connecting end 25a is housed inside the fourth connecting end 27, so that the fourth connecting end The two counterbore holes of 27 and the two screw holes of the third connection end 25a are aligned.
  • the third connecting end 25a has a straight prismatic shape
  • the fourth connecting end 27 has a shape that accommodates the third connecting end 25a and is connected to the third connecting end 25a.
  • the shape is a straight rectangular tube that can be connected to the portion 25a, the present embodiment is not limited to this.
  • the shape of the third connection end 25a is a straight columnar shape
  • the shape of the fourth connection end 27 is a straight cylinder that can accommodate the third connection end 25a and be connectable to the third connection end 25a. It may be in the shape of
  • the fourth connection end 27 having a rectangular tube shape accommodates the third connection end 25a having a prismatic shape and is connected to the third connection end 25a.
  • the present embodiment is not limited to this.
  • the third connection end 25a having a cylindrical shape may accommodate the fourth connection end 27 having a columnar shape and be connectable to the fourth connection end 27.
  • the second proximal end member 21 and the second distal end member 22 are connected to each other by two screws so as to be able to come into contact with and separate from them. It is not limited to this.
  • the second proximal end member 21 and the second distal end member 22 may be connected in a separable manner, for example, by one screw or three or more screws.
  • the first proximal end member 11 and the first distal end member 12 are connected to each other with a screw so that they can be connected to and separated from each other, but the present embodiment is limited to this. Not done.
  • the first proximal end member 11 and the first distal end member 12 may be removably connected to each other by a known fitting means other than screws.
  • the lower support portion 22a is provided continuously to the fourth connection end portion 27.
  • the shape of the lower support portion 22a is approximately plate-like.
  • the lower support portion 22a has a first plane 22b and a second plane 22c substantially parallel to the first plane 22b.
  • the lower support part 22a has the second plane 22c that is substantially parallel to the first plane 22b, but the present embodiment is not limited to this.
  • the lower support portion 22a may have a concave surface facing downward in the paper plane of FIG. 1, that is, a concave surface facing the first tip side member 12, instead of the second flat surface 22c.
  • the first plane 22b is provided on the lower surface of the lower support portion 22a in the plane of FIG. 1 so as to be orthogonal to a plane parallel to the plane around the axis of the hinge pin 14b.
  • the first plane 22b is provided on the outside of the crimping forceps 1 so as to be perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b.
  • the first plane 22b has a planar shape so that the crimping forceps 1 can stably stand on its own on a forceps preparation tray or the like.
  • the width of the first plane 22b in a direction perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b is larger than the width of other members included in the first arm 10 and the second arm 20.
  • the second plane 22c is provided on the upper surface of the lower support portion 22a in the plane of FIG. 1 so as to be orthogonal to a plane parallel to the plane around the axis of the hinge pin 14b. In other words, the second plane 22c is provided substantially parallel to the first plane 22b in the lower support portion 22a.
  • the second plane 22c is, for example, a rotation of a second object to be crimped (not shown), such as an arm placement jig for placing an arm to be treated for a fracture, in a plane substantially parallel to the lower support portion 22a. It has a planar shape so as not to hinder movement.
  • the second tip portion 26 is provided continuously to the lower support portion 22a.
  • the second tip portion 26 is provided so as to protrude downward from the lower support portion 22a in the paper plane of FIG.
  • the second tip 26 is provided to face the first tip 16 in a plane parallel to the plane around the axis of the hinge pin 14b.
  • the shape of the second tip 26 is such that it can be inserted into a hole provided in a second object to be pressed, such as an arm placement jig for placing an arm to be treated for a fracture. It has a spherical shape that allows the second object to be pressed to be pressed against the arm. In the crimping forceps 1 shown in FIG.
  • the second tip 26 has a spherical shape, but in general forceps, the second tip 26 is not limited to a spherical shape. In general forceps, the second tip side member 22 can be replaced so that the second tip 26 has various shapes depending on the purpose of the forceps.
  • FIG. 2B is a partially enlarged view showing a further enlarged part of the crimping forceps according to the first embodiment of the present invention.
  • the rotation angle adjustment mechanism 50 includes a first claw member 19, a second claw member 28, a torsion coil spring 29, and a lever 40, and adjusts the rotation angle of the first arm 10 and the second arm 20. This is to temporarily hold or release the adjusted angle.
  • the approximate positional relationship of these members is as follows.
  • the first claw member 19 is provided on the first arm 10 and extends toward the second arm 20 side.
  • the lever 40 is disposed from the second intersection portion 24 of the second arm 20 toward the second base end portion 23, straddling the first claw member 19 and the second claw member 28.
  • the first claw member 19 is a curved arc band-shaped member, and in a state where the first arm 10 and the second arm 20 are relatively closed, the first claw member 19 is a curved arc band member, and when the first arm 10 and the second arm 20 are relatively closed, the first claw member 19 is It extends from the surface facing the arm 20 through the groove 23d of the straight portion between the second intersection 24 and the second base end 23 of the second arm 20. That is, the first claw member 19 has a proximal end on the stopper portion 13c side, and a distal end on the side projecting beyond the second arm 20 in an arc band shape.
  • the first claw member 19 having an arc band shape has a curved concave inner peripheral edge facing the first intersection 14. Further, the first claw member 19 extends through the groove 23d of the straight portion between the second intersection portion 24 and the second base end portion 23 of the second arm 20. It has a curved convex outer peripheral edge 19b facing the protrusion 23b.
  • the outer peripheral edge 19b is provided with a plurality of continuous saw-blade-shaped holes extending at equal intervals from the tip of the first claw member 19 to the middle between the tip and the base end so as to be engaged with a second claw portion 28a, which will be described later.
  • One claw portion 19c is provided.
  • the first claw portion 19c has a first pressing surface 19d inclined from approximately the upper right to the lower left in FIG. 2B, and a first sliding surface 19d inclined from approximately the upper left to the lower right in FIG. 2B.
  • the surfaces 19e are arranged adjacent to each other alternately.
  • the first pressing surface 19d is configured to be pressed against a second pressing surface 28d of a second claw portion 28a, which will be described later. Therefore, the first pressing surface 19d is pressed against the second pressing surface 28d from the base end side of the first claw member 19 when attempting to open the first arm 10 and the second arm 20 from each other.
  • the first claw portions 19c are provided on the proximal surface of the first claw member 19.
  • the first pressing surface 19d and the second pressing surface 28d are pressed against each other, and the first claw portion 19c and the second claw portion are pressed against each other. 28a, the first claw portion 19c and the second claw portion 28a are engaged with each other, thereby preventing an opening operation.
  • the first sliding surface 19e is configured so that a second sliding surface 28e, which will be described later, slides thereon. Therefore, the first sliding surface 19e is configured such that the second sliding surface 28e slides from the distal end side to the proximal end side of the first claw member 19 in the operation of relatively closing the first arm 10 and the second arm 20.
  • each first claw portion 19c is provided on the surface of the first claw member 19 on the distal end side. That is, in the operation of relatively closing the first arm 10 and the second arm 20, the second sliding surface 28e slides from the distal end side to the proximal end side of the first sliding surface 19e, and the second sliding surface 28e slides between the first pressing surface 19d and the second pressing surface 19e.
  • the second claw member 28 extends so that the first claw member 19 passes through the groove portion 23d of the straight portion between the second intersection portion 24 and the second base end portion 23 of the second arm 20.
  • the second arm 20 is disposed in the groove 23d of the protrusion 23b of the second arm 20 so as to be adjacent to the base end side of the first claw member 19.
  • the second claw member 28 is a plate member having a substantially inverted trapezoidal shape in which the upper side is wider than the lower side in the paper of FIG. 2A.
  • the second claw member 28 has an axis in a direction perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b, and is supported by a first pin 28c that is supported by one plate forming the protrusion 23b.
  • the first pin 28c is rotatably supported around the axis of the first pin 28c. That is, the second claw member 28 is capable of forward and reverse rotation around the axis of the first pin 28c within a plane parallel to the plane around the axis of the hinge pin 14b in the groove 23d.
  • the second claw portion 28a of the second claw member 28 is arranged to mesh with the first claw portion 19c.
  • the first claw member 19 passes through the groove portion 23d of the straight portion between the second intersection portion 24 and the second base end portion 23 of the second arm 20. It is arranged in the groove portion 23d so as to be adjacent to the second base end portion 23 side of the first claw member 19 in an extended state.
  • the second claw portion 28a is pressed against the first pressing surface 19d of the first claw portion 19c described above, and is inclined from approximately the upper right to the lower left in FIG. 2B.
  • the contact surface 28d and the second sliding surface 28e that slides on the first sliding surface 19e described above and is inclined from approximately the upper left to the lower right in FIG. 2B are arranged alternately.
  • the second pressing surface 28d is pressed against the first pressing surface 19d when the first claw portion 19c and the second claw portion 28a are engaged. provided on opposing surfaces.
  • the second sliding surface 28e is provided on a surface that faces the first sliding surface 19e when the first claw part 19c and the second claw part 28a are locked. That is, when the first arm 10 and the second arm 20 are operated to close relative to each other, the second sliding surface 28e moves while contacting the first sliding surface 19e.
  • a plurality of (for example, two) first claw parts 19c and second claw parts 28a are engaged with each other, and the first claw part 19c and the second claw part 28a are engaged with each other.
  • all meshes are released.
  • a plurality of (for example, two) first claw parts 19c and second claw parts 28a are engaged with each other, that is, a plurality of second claw parts 28a are connected to the second claw member. 28, and are arranged so as to be able to engage with the first claw portions 19c, but the present invention is not limited thereto.
  • the second claw member 28 may be provided with one second claw portion 28a, which may be arranged so as to be able to engage with any one of the plurality of first claw portions 19c.
  • the second claw member 28 is provided, for example, in the central portion, from near the center of the side surface on the near side in the plane of the paper of FIG. 2A, and perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b, and It has a substantially cylindrical connecting protrusion 28b that is provided so as to protrude toward the front.
  • a lever 40 which will be described later, is relatively rotatably connected to the connection protrusion 28b in order to rotationally move the second claw member 28 around the axis of the first pin 28c so that the lock can be released.
  • FIG. 2A shows an example in which the elastic member according to the first embodiment of the present invention is a torsion coil spring.
  • the inner wall (locking wall 23e) between the second claw member 28 and the second finger ring part 23a and the groove 23d are connected to each other. It is arranged so that it is placed between. That is, the torsion coil spring 29 has an axis in the coil portion in a direction perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b, and is supported by the two plates forming the protrusion 23b. It is pivotally supported by a second pin 29a.
  • One end of the torsion coil spring 29 is locked to the second arm 20 by a locking wall 23e provided at the boundary between the groove portion 23d and the second finger ring portion 23a. Further, the other end of the torsion coil spring 29 is connected to the side surface of the second claw member 28 on the base end side of the second arm 20 .
  • the torsion coil spring 29 rotates the second claw member 28 around the axis of the first pin 28c so that the first claw part 19c and the second claw part 28a are engaged with each other.
  • a biasing force toward the first claw member 19 is exerted against the first claw member 19 .
  • the torsion coil spring 29 exerts a biasing force toward the first claw member 19 against the second claw member 28, so that the engaged state of the first claw portion 19c and the second claw portion 28a is maintained.
  • the rotation angle between the first arm 10 and the second arm 20 is maintained.
  • the first claw member 19, the second claw member 28, and the torsion coil spring 29 of the rotation angle adjustment mechanism 50 smoothly close the first arm 10 and the second arm 20 relative to each other.
  • the desired opening/closing angle is immediately maintained at the desired opening/closing angle.
  • the second sliding surface 28e of the second claw portion 28a is , moves from the tip side of the first claw member 19 toward the stopper portion 13c while contacting the first sliding surface 19e of the first claw member 19c.
  • the second sliding surface 28e of the second claw portion 28a that moves in this way moves toward the stopper portion 13c side of the first sliding surface 19e by continuing the operation of relatively closing the first arm 10 and the second arm 20. 2B, and moves so as to contact another first sliding surface 19e arranged adjacent to the lower side in the paper plane of FIG. 2B.
  • the desired opening/closing angle is reached and the relative closing operation of the first arm 10 and the second arm 20 is stopped.
  • the second pressing surface 28d of the moved second claw portion 28a immediately contacts and locks the first pressing surface 19d of another first claw portion 19c.
  • the second pressing surface 28d of the second claw portion 28a that has moved is immediately pressed against the first pressing surface of another first claw portion 19c adjacent to the stopper portion 13c side. It contacts and locks the surface 19d.
  • the second pressing surface 28d of the moved second claw portion 28a immediately moves to another When the first pressing surface 19d of the first claw part 19c does not contact and is not locked, that is, the second sliding surface 28e of the second claw part 28a moves to the first sliding surface 19e of another first claw part. If the forceps are in contact with each other halfway and are sliding, the force applied to the crimping forceps by the ring finger inserted into the first finger ring part 13a and the thumb inserted into the second finger ring part 23a is weakened.
  • the second sliding surface 28e of the second claw portion 28a that has moved comes into contact with the first sliding surface 19e of another first claw portion 19c adjacent to the stopper portion 13c due to the biasing force of the torsion coil spring 29. While doing so, it moves from the stopper portion 13c side to the tip side of the first claw member 19. That is, the biasing force of the torsion coil spring 29 causes the first arm 10 and the second arm 20 to relatively open slightly. Due to such a relatively slight opening operation of the first arm 10 and the second arm 20, the second pressing surface 28d of the second claw portion 28a that has moved is pressed against another first pressing surface 28d adjacent to the stopper portion 13c side. It contacts and locks the first pressing surface 19d of the claw portion 19c.
  • the first pressing surface 19d of the first claw portion 19c and the second pressing surface 28d of the second claw portion 28a are brought into contact and locked, and the biasing force of the torsion coil spring 29 engages the first claw portion 19c and the second claw portion 28a.
  • the position of the second claw member 28 when the first claw part 19c and the second claw part 28a are engaged is the engagement position of the second claw member 28.
  • the elastic member is a torsion coil spring, but the present invention is not limited to this. Any elastic member may be used as long as it can apply a biasing force toward the first claw member 19 with respect to the second claw member 28 .
  • the lever 40 moves along the central axis when the first arm 10 and the second arm 20 are relatively closed in the plane of FIG.
  • the distal end is arranged to partially overlap the second arm 20, and the proximal end is connected to the second claw member 28 by a connecting protrusion 28b.
  • the lever 40 has a substantially rectangular plate shape that is elongated in the longitudinal direction L in FIG.
  • the lever 40 is arranged along the longitudinal direction L in the plane of FIG. 1 so as to overlap the second intersection 24 and the protrusion 23b of the second arm 20.
  • the lever 40 is arranged such that, in the paper of FIG. There is. That is, the lever 40 is arranged between the first arm 10 and the second arm 20 in the plane of FIG.
  • the lever 40 has a lever hole 40a that is relatively rotatably connected to the connecting protrusion 28b of the second claw member 28 on the proximal end side of the lever 40, and a lever end surface finger rest that fits the shape of a finger on the distal end side of the lever 40. 40b. Further, the lever 40 overlaps the second intersection 24 between the tip and the base end of the lever 40, and the projection 41 provided at the second intersection 24 of the second arm 20 described above can be moved relative to the second intersection 24.
  • the lever 40 has an elongated hole 42 that extends in the longitudinal direction of the lever 40 .
  • a head 41a of the protrusion 41 which has a substantially disk shape with a diameter longer than the length of the elongated hole 42 in the transverse direction, is provided at the tip of the protrusion 41 that enters the elongated hole 42.
  • the head 41a of the protrusion 41 functions to prevent the lever 40 from coming off the elongated hole 42, and guides the movement of the lever 40 in the longitudinal direction L along a plane parallel to the plane around the axis of the hinge pin 14b.
  • the lever 40 can be moved in the longitudinal direction of the lever 40 within a plane parallel to the plane around the axis of the hinge pin 14b by the relative movement of the protrusion 41 and the elongated hole 42 within the range of the longitudinal length of the elongated hole 42. Move while being guided by.
  • the protrusion 41 allows the torsion coil spring 29 to be attached when the first claw part 19c and the second claw part 28a are engaged by the connection between the lever hole 40a and the connecting protrusion 28b of the second claw member 28, which will be described later. Due to the force, the second claw member 28 is locked at the proximal end of the elongated hole 42 or positioned near the end. Further, the projection 41 is formed in the elongated hole 42 when the engagement between the first claw part 19c and the second claw part 28a is released due to the connection between the lever hole part 40a and the connecting protrusion 28b of the second claw member 28. It is locked at the distal end or located near the end.
  • the lever 40 is moved so that the protrusion 41 moves relative to the elongated hole 42 between the proximal end or the vicinity of the end and the distal end or the vicinity of the end of the elongated hole 42. Then, the first claw part 19c and the second claw part 28a are engaged or disengaged.
  • the lever hole 40a is provided at the base end of the lever 40 and is connected to the connecting protrusion 28b of the second claw member 28, which is biased by the other end 29c of the torsion coil spring 29, so as to be relatively rotatable. Therefore, when the lever 40 is moved such that the protrusion 41 moves relative to the proximal end of the elongated hole 42 from the proximal end to the distal end, the lever hole 40a and the connecting protrusion 28b rotate relative to each other. At this time, the second claw member 28 moves the first claw part 19c and the second claw part 28a from the position where the first claw part 19c and the second claw part 28a are engaged with each other around the axis of the first pin 28c.
  • the position of the second claw member 28 when the first claw part 19c and the second claw part 28a are engaged is defined as the engagement position, and the first claw part 28a is the engaged position.
  • the position of the second claw member 28 when the engagement between the claw part 19c and the second claw part 28a is released is defined as a disengaged position. That is, the lever 40 rotates the second claw member 28 from the engaged position to the disengaged position against the biasing force of the other end 29c of the torsion coil spring 29, and moves the first claw part 19c and the second claw part 28a. It is movable so as to release the mesh.
  • the lever hole 40a of the lever 40 protrudes from the second base end 23 toward the first base end 13 when the first arm 10 and the second arm 20 are relatively closed. It is connected to a connecting protrusion 28b of the second claw member 28 disposed in the groove 23d of the protrusion 23b. Further, the lever 40 is moved in the longitudinal direction of the lever 40 in a plane parallel to the plane around the axis of the hinge pin 14b due to the relative movement between the elongated hole 42 and the protrusion 41 of the second intersection 24 and the head 41a of the protrusion 41. Direction is restricted.
  • the lever 40 can be connected to the first intersection 14 and the second intersection 24 in a plane parallel to the plane around the axis of the hinge pin 14b. It is possible to move in an area surrounded by the base end portion 13 and the second base end portion 23. Since the lever 40 is movable within such a region, the index finger between the ring finger inserted into the first finger ring part 13a and the thumb inserted into the second finger ring part 23a can be moved to the lever end surface finger rest part described later. 40b makes it easier to operate the lever 40.
  • the lever end surface finger rest part 40b has a side surface that opens from the proximal end side to the distal end side so as to have a curved recess that fits the shape of the finger when viewed in a direction perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b. It has a Y-shaped shape.
  • the Y-shape includes a substantially Y-shape.
  • the index finger of the right hand or the left hand can be placed on the lever end surface finger holding portion 40b.
  • the lever end surface finger rest portion 40b is provided so as to protrude from the front toward the back in the paper of FIG. 2A.
  • the lever end surface finger hook portion 40b is sandwiched between the first intersection portion 14 and the second intersection portion 24 on the distal side of the hinge pin 14b in a plane parallel to the plane around the axis of the hinge pin 14b. It is provided so that it can move in the longitudinal direction of the lever 40 in space.
  • the first arm 10 and the second arm 20 are relatively closed in the plane of FIG. It is a shape. That is, due to the shape of the curved portion on the distal end side of the first intersection portion 14 and the second intersection portion 24, the first intersection portion 14 and the second intersection portion 24 are formed in a plane parallel to the plane around the axis of the hinge pin 14b.
  • the Y-shape includes a substantially Y-shape. That is, on the distal end sides of the first intersection 14 and the second intersection 24 in a plane parallel to the plane around the axis of the hinge pin 14b, the lever end surface finger is inserted into the gap between the first intersection 14 and the second intersection 24.
  • a hanging portion 40b is arranged. Since the lever end surface finger rest part 40b is arranged in such a gap, even when the first arm 10 and the second arm 20 are relatively closed, the index finger of the right or left hand can be placed in the lever end face finger rest part 40b. It can be applied to.
  • the thumb is inserted into the second finger ring portion 23a.
  • the ring finger is inserted into the first finger ring portion 13a.
  • the index finger between the thumb and ring finger is placed on the lever end surface finger hook 40b. Operate the lever 40 by pulling it with the index finger placed on the lever end finger hook 40b, and move the second claw member 28 in a plane parallel to the plane around the axis of the hinge pin 14b against the biasing force of the torsion coil spring 29. It can be moved from the engaged position to the disengaged position.
  • the crimping forceps 1 according to the first embodiment is easier to operate than forceps according to the prior art because the forceps can be operated only by pulling with the index finger, regardless of whether the person operating the forceps is right-handed or left-handed. The difference can be reduced.
  • the lever 40 in this way, it becomes easier to perform an opening/closing operation that increases the opening/closing angle between the first arm 10 and the second arm 20 in a plane parallel to the plane around the axis of the hinge pin 14b. Specifically, when attempting to perform an opening/closing operation to increase the opening/closing angle between the first arm 10 and the second arm 20, the ring finger is inserted into the first finger ring portion 13a, and the thumb is inserted into the second finger ring portion 23a. , place your index finger on the lever end face finger hook 40b.
  • the lever is operated with the index finger placed on the finger hook portion 40b on the end surface of the lever, so as to resist the biasing force of the torsion coil spring 29 applied via the second claw member 28.
  • the operated lever 40 is guided in the longitudinal direction of the lever 40 in a plane parallel to the plane around the axis of the hinge pin 14b by the relative movement of the protrusion 41 and the elongated hole 42, and the lever 40 is guided in the longitudinal direction of the lever 40 in the plane parallel to the plane around the axis of the hinge pin 14b. It moves straight through an area surrounded by the second intersection 24, the first base end 13, and the second base end 23.
  • the engagement release operation of the forceps in Patent Document 1 is performed not between the two finger ring parts in a plane parallel to the plane in which the arm rotates, but on the side of one ring part and on the outside of the forceps. It is difficult to operate the engagement release operation.
  • the crimping forceps 1 makes it easier to operate the engagement release operation when adjusting the angle of the opening and closing operation, compared to these conventional forceps.
  • the second intersection 24 is provided with the protrusion 41, and the lever 40 is provided with the elongated hole 42, but the present invention is not limited to this.
  • the lever 40 according to the first embodiment of the present invention is provided with a protrusion 41, and the second intersection portion 24 is provided with an elongated hole 42 that is long in the longitudinal direction of the lever 40, so that the protrusion 41 and the elongated hole 42 move relative to each other. Good too.
  • FIG. 3 is a diagram showing how the first arm 10 and the second arm 20 are operated to adjust the crimping forceps 1 shown in FIG. 1 to a desired opening/closing angle, and the crimping forceps are crimped onto an object to be crimped.
  • a finger is inserted in the direction toward which it is directed.
  • the ring finger of the right hand is inserted into the first finger ring portion 13a, and the thumb of the right hand is inserted into the second finger ring portion 23a.
  • the little finger of the right hand is placed on the proximal finger holding portion 13b in order to stably operate the crimping forceps 1.
  • the index finger is hooked on the lever end surface finger hook portion 40b of the lever 40.
  • the tip of the first arm 10 and the second arm 20 are moved.
  • the first arm 10 and the second arm 20 are opened and closed so as to be brought closer to each other so that the first arm 10 and the second arm 20 are relatively closed.
  • the tip of the first arm 10 and the second arm 20 are opened and closed relative to each other by separating the tips of the first arm 10 and the second arm 20 from each other.
  • the rotation angle adjustment mechanism 50 is used when it is desired to maintain the opening/closing angle of the first arm 10 and the second arm 20 at a desired angle during this opening/closing operation.
  • FIG. 3 also shows how the crimping forceps are crimped onto the object to be crimped.
  • a hole (not shown) provided in a guide block (an example of a first pressurized object) 62, which is an example of a pressurized object superimposed on a plate 61 that fixes the radius of an arm 60, is shown.
  • a first tip 16 having a spherical shape is inserted to press the guide block 62 onto the arm.
  • FIG. 3 shows how the crimping forceps are crimped onto the object to be crimped.
  • a spherical shape is formed with respect to a hole (not shown) provided in an arm placement jig (an example of a second press-bonded body) 63 on which an arm 60, which is another example of a press-bonded body, is placed.
  • the second end portion 26 having a second end portion 26 is inserted to press the arm placement jig 63 onto the arm.
  • the second claw member 28 is in contact with the first claw member 19 due to the biasing force of the torsion coil spring 29, and is capable of forward and reverse rotational movement relative to the first claw member 19.
  • the first arm 10 and the second arm 20 are operated to further close in this state, the second claw member 28 is attached to the first base end portion 13 of the first arm 10 with respect to the first claw member 19 in FIG. be moved closer.
  • the second sliding surface 28e of the second claw section 28a comes into contact with the first sliding surface 19e of the first claw section 19c while allowing the first claw section 19c and the second claw section 28a to engage with each other. While doing so, the first claw member 19 moves from the distal end side to the stopper portion 13c side.
  • the second sliding surface 28e of the second claw portion 28a that moves in this way moves toward the stopper portion 13c side of the first sliding surface 19e by continuing the operation of relatively closing the first arm 10 and the second arm 20. 3, and moves so as to contact another first sliding surface 19e disposed adjacent to the lower side of FIG.
  • the second pressing surface 28d next to the second sliding surface 28e of the second claw portion 28a that has moved from the first sliding surface 19e of the first claw portion 19c to another first sliding surface 19e is pressed against the first claw member 19.
  • the other end 29c of the torsion coil spring 29, which exerts a biasing force toward the stopper portion 13c, immediately contacts and locks the first pressing surface 19d of another first claw portion 19c adjacent to the stopper portion 13c side.
  • FIG. 4 shows how the crimping forceps shown in FIG. 3 is brought to a desired opening/closing angle by relatively closing the first arm 10 and the second arm 20 from a state where the opening/closing angle is more open than the desired opening/closing angle shown in FIG. It is a diagram showing how it has been reached. Note that in FIG. 4, illustration of the guide block 62 and the like is omitted. When the desired opening/closing angle shown in FIG. 4 is reached, the movement of the thumb and ring finger of the right hand operating the crimping forceps 1 is stopped, and the relative rotational movement between the first arm 10 and the second arm 20 is stopped. .
  • the biasing force of the torsion coil spring 29 toward the first claw member 19 with respect to the second claw member 28 causes the first claw portion 19c and the second claw portion 28a are locked.
  • the second sliding surface 28e is brought into contact with the first sliding surface 19e by force, and the first arm 10 and the second arm 20 are slightly opened relative to each other by the urging force of the torsion coil spring 29.
  • the second pressing surface 28d is pressed against the first pressing surface 19d.
  • FIG. 5 is a partially enlarged view showing a part of the crimping forceps 1 in the operation of opening and closing the opening and closing angle from the closed state shown in FIG.
  • the first arm 10 and the second arm 20 may be moved relative to each other in a plane parallel to a plane around the axis of the hinge pin 14b from a closed desired opening/closing angle state shown in FIG. Assume that the case is rotated so that it opens.
  • the index finger of the right hand is placed on the finger hook portion 40b of the lever end surface of the lever 40.
  • the lever 40 is pulled with the index finger of the right hand so as to move in a plane parallel to the plane around the axis of the hinge pin 14b against the biasing force of the torsion coil spring 29 via the second claw member 28. .
  • the lever 40 is guided in the longitudinal direction of the lever 40 by the relative movement between the protrusion 41 and the elongated hole 42, and the lever 40 is guided in the longitudinal direction of the lever 40 by the relative movement between the protrusion 41 and the elongated hole 42. It moves along the longitudinal direction within a region surrounded by the portion 13 and the second base end portion 23 .
  • the second claw member 28 rotates clockwise in FIG. 2A in a plane parallel to the plane around the axis of the hinge pin 14b. Rotate and move. That is, when the lever 40 is operated in a straight line, the second claw member 28 is rotated and moved from the engaged position to the disengaged position in a plane parallel to the plane around the axis of the hinge pin 14b, and the second claw member 28 is moved from the engaged position to the disengaged position. The engagement with the two claw portions 28a is released.
  • FIG. 5 shows that the lever 40 is operated in a straight line so that the protrusion 41 moves relatively to the middle of the elongated hole 42, the second claw member 28 is moved to the disengaged position, and the first claw part 19c and the second claw part 28a is shown disengaged.
  • the crimping forceps 1 in which the engagement between the first claw part 19c and the second claw part 28a has been released operates the first arm 10 and the second arm 20 to be opened relatively to increase the opening/closing angle. It is possible to adjust it as follows. Specifically, when increasing the opening/closing angle of the first arm 10 and the second arm 20, while operating the lever 40 in a straight line with the index finger of the right hand, the ring finger and the index finger of the right hand inserted into the first ring part 13a are pressed. The thumb of the right hand inserted into the second finger ring part 23a is moved away from each other. In other words, while keeping the right index finger bent, open the right hand and move the right thumb and right ring finger.
  • the first finger ring part 13a into which the ring finger of the right hand is inserted and the second ring part 23a into which the thumb of the right hand is inserted move from the hinge pin 14b. They are moved apart from each other in a plane parallel to the plane around the axis.
  • the biasing force of the torsion coil spring 29 toward the first claw member 19 causes the first claw portion 19c and the second claw portion to 28a are locked.
  • the second sliding surface 28e is brought into contact with the first sliding surface 19e by force, and the second pressing surface 28d is pressed against the first pressing surface 19d by a slight opening movement. That is, when adjusting the opening/closing angle between the first arm 10 and the second arm 20 to increase or decrease and maintaining the opening/closing angle at a desired angle, the biasing force of the torsion coil spring 29 causes the first arm 10 to The opening/closing angle with the second arm 20 is maintained.
  • the first arm can be moved by separating the thumb and ring finger of the dominant hand.
  • the index finger between the thumb and ring finger to operate the lever 40 in the plane parallel to the plane around the axis of the hinge pin 14b.
  • the second claw member 28 can be moved from the engagement position to the engagement release position, and the engagement between the first claw portion 19c and the second claw portion 28a can be completely released. Therefore, the difference in operability can be reduced regardless of whether the operator is right-handed or left-handed.
  • first claw portion 19c and the second claw portion 28a can be engaged with each other by simply moving the lever 40 straight in the opening/closing operation plane instead of twisting it in a direction intersecting the opening/closing operation plane. This makes it easier to release the mesh when adjusting the angle of the opening/closing operation.
  • the lever 40 is moved between the first intersection portion 14 and the second intersection portion 24 and the first proximal end within a plane parallel to the plane around the axis of the hinge pin 14b.
  • the index finger is simply bent between the ring finger inserted into the first finger ring section 13a and the thumb inserted into the second finger ring section. It can be operated easily.
  • the crimping forceps 1 capable of such an operation has a structure in which the first plane 22b for self-supporting of the crimping forceps 1 is perpendicular to the plane parallel to the plane around the axis of the hinge pin 14b. It is provided on the outside of the crimping forceps 1 so as to do so. That is, the first plane 22b is a mounting surface for the crimping forceps 1 to stand on its own. Note that, when the crimping forceps 1 stands on its own, a portion other than the first plane 22b may come into contact with the mounting location.
  • the crimping forceps 1 may be stably made to stand on its own by, for example, bringing the first plane 22b and the outer peripheral edge of the first finger ring portion 13a of the first proximal end portion 13 into contact with a mounting location.
  • the crimping forceps 1 according to the first embodiment in the paper of FIG. It is provided so as to extend through it. That is, the first claw member 19 does not extend downward from the first arm 10 in the paper of FIG. Therefore, the first claw member 19 does not hinder the crimping forceps 1 from standing on its own.
  • the protrusion 41 that enters into the elongated hole 42 of the lever 40 moves relative to the elongated hole 42, and functions as a prevention for the lever 40 to come off from the elongated hole 42. . Therefore, since the lever 40 is guided to move straight in the longitudinal direction of the lever 40 in a plane parallel to the plane around the axis of the hinge pin 14b, it becomes easier to operate the lever 40 to release the engagement.
  • the lever 40 has a horizontal Y-shape that opens from the proximal end to the distal end so as to have a curved recess that fits the shape of the finger.
  • a lever end surface finger rest portion 40b is provided. Therefore, when the lever 40 is moved straight in a plane parallel to the plane around the axis of the hinge pin 14b, the index finger operating the lever 40 can be easily and reliably hooked onto the lever end surface finger hook 40b, so that the engagement by the lever 40 can be released. It becomes easier to control movements.
  • the elastic member is the torsion coil spring 29, and the one end 29b of the torsion coil spring 29 is connected to the second arm 20, and the other end 29c of the torsion coil spring 29 is connected to the second arm 20.
  • the torsion coil spring 29 is arranged so as to be pivotally supported by the second pin 29a in the coil portion.
  • the proximal finger resting part 13b is provided on the outer peripheral edge of the first finger ring part 13a, extending in the longitudinal direction of the first arm 10, and the little finger can be rested on the outer peripheral edge of the first finger ring part 13a. It will be done. Therefore, the forceps can be operated stably.
  • the first tip side member 12 of the first arm 10 is detachably connected to the first proximal side member 11, and the first end side member 12 of the first arm 10 is detachably connected to the first base side member 11.
  • the second tip side member 22 is detachably connected to the second base side member 21. Therefore, by removing the first tip side member 12 and the second tip side member 22 from each arm, it becomes easier to clean and disinfect, and the first tip side has an optimal shape depending on the use of the forceps.
  • the member 12 and the second tip side member 22 can also be replaced.
  • the detachable first tip side member 12 and second tip side member 22 are made of resin that transmits X-rays, the forceps can be easily attached to the forceps. X-ray photography can be performed while the device is in use.
  • the engagement release operation is performed when adjusting the degree of crimping. is easy to operate, and the object to be crimped can be fixed in a detachable manner.
  • the first tip 16 and the second tip 26 are formed into a spherical shape that can be inserted into a hole provided in the object to be crimped. Therefore, it is possible to more reliably press the object to be pressed.
  • FIG. 6 is a diagram showing a crimping forceps according to a first modification of the first embodiment of the present invention.
  • the shape of the lever end surface finger rest 40b is changed to the right index finger of a right-handed person from the back to the front in the paper of FIG. 6, instead of having a horizontal Y-shape. It has an oval ring shape that allows a left-handed person to insert their left index finger from the front to the back.
  • the shape of the lever end surface finger rest portion 40b is an elliptical ring shape into which a finger can be inserted in a direction perpendicular to a plane parallel to a plane around the axis of the hinge pin 14b.
  • orthogonal includes substantially orthogonal.
  • the index finger operating the lever 40 when the lever 40 is moved straight in a plane parallel to the plane around the axis of the hinge pin 14b, the index finger operating the lever 40 is It can be easily and reliably hung on the lever end face finger hook portion 40b. Further, even if the hand of the person operating the crimping forceps 1 is large and the length of the index finger operating the lever 40 is long, the ring-shaped lever end surface finger rest portion 40b can be prevented from forcibly bending the index finger. You can put your finger on the outer periphery of the tip. Therefore, it becomes easier to operate the engagement release operation using the lever 40.
  • Bone grasping forceps 2 are an example of forceps according to the present invention, and are for directly grasping bones.
  • the second modified example of the first embodiment only the points different from the first embodiment or the first modified example of the first embodiment will be explained, so the same components as in FIG. 1 or FIG. 6 will be explained. The same reference numerals will be used and the explanation will be omitted.
  • FIG. 7A is a diagram showing a bone grasping forceps according to a second modification of the first embodiment of the present invention.
  • the first arm 10 and the second arm 20 are each formed as an integral member.
  • the first arm 10 and the second arm 20 are made of a metal such as stainless steel (SUS), which has a rigidity comparable to that of stainless steel (SUS).
  • the first arm 10 and the second arm 20 are made of metal such as stainless steel (SUS), but the present embodiment is not limited to this.
  • the first arm 10 and the second arm 20 may be made of a material having a rigidity comparable to or higher than that of stainless steel (SUS).
  • the first distal end portion 16 of the first arm 10 is integrally disposed on the distal end side of the upper support portion 12a. Furthermore, a second tip 26 of the second arm 20 is integrally disposed on the tip side of the lower support portion 22a.
  • the first distal end portion 16 and the second distal end portion 26 each have a substantially conical shape that tapers from the proximal end toward the distal end.
  • the first tip portion 16 is curved so as to be convex toward the upper left in the paper of FIG. 7A.
  • the second tip portion 26 is curved so as to be convex toward the lower left in the paper of FIG. 7A. That is, the first tip 16 and the second tip 26 are provided so that their respective tips face each other, and the object to be grasped, that is, the bone, is held between the first tip 16 and the second tip 26. It can be grasped directly.
  • the first arm 10 and the second arm 20 are each formed as an integral member from the base end to the distal end.
  • the shapes of the first distal end portion 16 and the second distal end portion 26 are substantially conical shapes that taper from the base end side to the distal end side.
  • Such forceps can be used, for example, as a bone grasping forceps that grasps a bone by stabbing the tips of the first tip 16 and the second tip 26 into the surface of a fractured bone fragment.
  • the retractor 3 in a third modification of the first embodiment will be described with reference to FIG. 7B.
  • the retractor 3 is an example of the forceps according to the present invention, and is used to spread open the soft tissue at the surgical site. Note that regarding the third modified example of the first embodiment, only the points different from the first embodiment, the first modified example of the first embodiment, or the second modified example of the first embodiment are explained, so the drawings are 1, the same reference numerals are used for the same components as in FIG. 6 or FIG. 7A, and the description thereof will be omitted.
  • FIG. 7B is a diagram showing a retractor according to a third modification of the first embodiment of the present invention.
  • the first arm 10 and the second arm 20 are mutually arranged at the first rotation support part 114 and the second rotation support part 124, which are intermediate in the longitudinal direction. It is rotatably supported.
  • the first base end side member 11 is connected to the first base end part 13 and the first base end member 11 in order from the first base end part 13 side to the first distal end part 16 side along the longitudinal direction of the first arm 10.
  • the dynamic support portion 114 and the first extension portion 15 are continuously provided.
  • the first rotation support part 114 is provided continuously to the stopper part 13c, that is, the tip of the first base end part 13. Further, in the first rotation support section 114, the first arm 10 and the second arm 20 are supported so as to be rotatable relative to each other, and the two substantially disk-shaped plates of the second arm 20 are connected to the retractor 3. It is sandwiched between second rotation support parts 124 that are bifurcated so as to be arranged parallel to each other along the longitudinal direction. The base end side of the first rotation support part 114 is integrally connected to the stopper part 13c of the first base end part 13.
  • the first proximal end member 11 has a hinge portion 14a that rotatably supports the second arm 20 in the first rotation support portion 114.
  • the hinge portion 14a is fixed to the first rotation support portion 114 of the first arm 10 such that the hinge pin 14b stands up from a substantially disc-shaped plate of the second rotation support portion 124 on the upper right side in the paper of FIG. 7B.
  • the hinge pin 14b rotatably penetrates the second arm 20 with respect to the first arm 10 and is pivotally supported, and the head 14c of the hinge pin 14b is crushed to prevent it from coming off in the axial direction. With this configuration, the first arm 10 and the second arm 20 can relatively rotate forward and backward within a plane parallel to the plane around the axis of the hinge pin 14b.
  • a curved portion that is convex toward the upper right in the paper plane of FIG. 7B is provided on the distal end side of the first rotation support portion 114, and is continuously and integrally connected to the proximal end side of the first extension portion 15. There is.
  • the first distal end member 12 is connected to the second connecting end 17 and the first distal end in order from the proximal end side to the distal end side of the first distal end member 12 along the longitudinal direction of the first arm 10. 16, and is curved convexly toward the lower left in the paper of FIG. 7B.
  • the first tip portion 16 is provided so as to extend toward the upper left in the paper of FIG. 7B.
  • each of the first retraction claws 16a is arranged so that the first arm
  • the proximal end sides of the second arm 10 and the second arm 20 are opened, they are arranged alternately with each second retracting claw part 26a along the longitudinal direction of the retractor 3 so as to intersect with each second retracting claw part 26a, which will be described later.
  • Each first retracting claw portion 16a is provided with a first retracting surface 16b so as to intersect with the direction in which the first arm 10 and the second arm 20 relatively open and close.
  • Each first retraction surface 16b can be inserted into a wound at a surgical site during surgery by operating the retractor 3 described later, come into contact with the soft tissue at the surgical site, and push the soft tissue at the surgical site.
  • the first distal end portion 16 is provided with two first retractor claws 16a, but the present modification is not limited to this.
  • the number of first retraction claws 16a may be other than two.
  • the second proximal end member 21 is connected to the second proximal end 23 and the second proximal end member 21 in order from the second proximal end 23 side to the second distal end portion 26 side along the longitudinal direction of the second arm 20.
  • the dynamic support portion 124 and the second extension portion 25 are continuously provided.
  • the second rotation support part 124 is provided continuously at the tip of the second base end part 23. Further, in the second rotation support section 124, the first arm 10 and the second arm 20 are supported so as to be rotatable relative to each other, and sandwich the first rotation support section 114 therebetween.
  • the base end side of the second rotation support portion 124 is integrally connected to the distal end of the second base end portion 23 .
  • the second rotation support portion 124 is provided with a protrusion 41 that protrudes downward to the left in the plane of the paper of FIG. 7B and engages with the lever 40, so as to be perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b. There is. Furthermore, as described above, the hinge pin 14b of the hinge portion 14a that rotatably supports the second arm 20 passes through the second rotation support portion 124.
  • a curved portion that is convex toward the lower left in the paper plane of FIG. 7B is provided on the distal end side of the second rotation support portion 124, and is continuously and integrally connected to the proximal end side of the first extension portion 15. There is.
  • the second distal end member 22 is connected to a fourth connecting end 27 and a lower support portion in order from the proximal end side to the distal end side of the second distal end member 22 along the longitudinal direction of the second arm 20.
  • the second tip portion 26 is provided so as to extend toward the upper left in the paper of FIG. 7B.
  • Each of the second retraction claws 26a extends along the longitudinal direction of the retractor 3 so as to intersect with each of the first retraction claws 16a when the first arm 10 and the second arm 20 are relatively closed. They are arranged so as to be alternately positioned with the first retraction claw parts 16a.
  • Each second retracting claw portion 26a is provided with a second retracting surface 26b so as to intersect with the direction in which the first arm 10 and the second arm 20 relatively open and close.
  • each second retraction surface 26b can be inserted into a wound at the surgical site during surgery, come into contact with the soft tissue at the surgical site, and push the soft tissue at the surgical site.
  • the second distal end portion 26 is provided with three second retractor claws 26a, but the present modification is not limited to this.
  • the number of second retraction claws 26a may be other than three.
  • the lever 40 is arranged so as to substantially overlap the second arm 20 in the paper of FIG. 7B. That is, the lever 40 is arranged between the first arm 10 and the second arm 20 in the paper of FIG. 7B, and its tip side overlaps the second rotation support part 124 sandwiching the first rotation support part 114, The proximal end side overlaps the protrusion 23b. Further, the lever 40 overlaps the second rotation support part 124 between the tip and the base end of the lever 40, and the protrusion 41 provided on the second rotation support part 124 of the second arm 20 described above
  • the lever 40 has an elongated hole 42 that is relatively movable and extends in the longitudinal direction of the lever 40 .
  • the first finger ring portion 13a and the second finger ring portion 23a each have a width corresponding to that of the paper surface of FIG. 7B.
  • the finger is inserted in the direction from the front left to the back right.
  • the ring finger of the right hand is inserted into the first finger ring portion 13a, and the thumb of the right hand is inserted into the second finger ring portion 23a.
  • the index finger is hooked on the lever end surface finger hook portion 40b of the lever 40.
  • the first arm 10 and the second arm 20 are opened relatively by separating the distal ends thereof (that is, the first arm 10 and the second arm 20 are opened so that the distal ends of the first arm 10 and the second arm 20 are opened. (close the proximal end side).
  • the first retraction surface 16b of the first distal end 16 and the second retraction surface 26b of the second distal end 26 are separated from each other, and the respective surgical operations are performed.
  • the first retraction surface 16b and the second retraction surface 26b push the soft tissues of the surgical site that are in contact with each other, thereby relieving the surgical site.
  • Spread out soft tissue by opening the first arm 10 and the second arm 20 relatively.
  • the tip of the first arm 10 and the second arm 20 are opened and closed so as to be relatively closed.
  • the first retraction surface 16b and the second retraction surface 26b can be separated from the soft tissues of the surgical site, respectively.
  • the first tip portion 16 and the second tip portion 26 have the first retraction surface 16b that allows the soft tissue of the surgical site to be spread apart. and a second retraction surface 26b.
  • Such forceps can be used, for example, as a retractor capable of holding soft tissue at a surgical site in a spread state.
  • the fourth modification of the first embodiment includes the first embodiment, the first modification of the first embodiment, the second modification of the first embodiment, or the third modification of the first embodiment.
  • the same reference numerals are used for the same components as in FIG. 1, FIG. 6, FIG. 7A, or FIG.
  • FIG. 8 is a diagram showing crimping forceps as an example of forceps according to a fourth modification of the first embodiment of the present invention.
  • the second proximal end member 21 extends from the second proximal end 23 side toward the second distal end portion 26 side, and the trapezoidal frame One side, the upper side, and the other side are successively arranged so that they are part of a shape.
  • the second base end portion 23 has a shape that projects upward in the plane of the paper of FIG. 8 because the upper side and the pair of side sides are continuously arranged so as to be part of a trapezoidal frame shape. .
  • the lever 400 has a long hole 42 at the tip thereof. Further, the lever 400 has a lever intermediate finger resting part 40c located at the middle in the longitudinal direction of the lever 400 and between the elongated hole 42 and the lever hole part 40a. The lever intermediate finger rest part 40c is provided in place of the lever end face finger rest part 40b in the third modification of the first embodiment.
  • the shape of the lever intermediate finger rest portion 40c is an elliptical ring shape that protrudes inward from the lever 400 in the paper of FIG.
  • the shape of the lever intermediate finger rest part 40c is an ellipse in which the right index finger of a right-handed person can be inserted from the back to the front, or the left index finger of a left-handed person can be inserted from the front to the back in the paper of FIG. It has a ring shape.
  • orthogonal includes substantially orthogonal.
  • the lever intermediate finger hook portion 40c extends from the proximal end of the crimping forceps 1 to the distal end along the longitudinal axis of the lever 400 in a plane parallel to the axis of the hinge pin 14b.
  • the claw member 19, the lever intermediate finger rest part 40c, and the hinge part 14a are arranged in this order. That is, the lever intermediate finger rest part 40c is arranged so as to be surrounded by the first arm 10 and the second arm 20 on the proximal end side of the hinge part 14a in a plane parallel to the axis of the hinge pin 14b. That is, the lever intermediate finger rest part 40c is provided not on the distal side of the hinge part 14a but on the proximal side.
  • the lever 400 is provided with a lever intermediate finger resting part 40c having an elliptical ring shape on the proximal side of the hinge part 14a. Therefore, even when the person operating the crimping forceps 1 has small hands, the index finger operating the lever 400 can be easily and reliably hooked onto the lever intermediate finger hook portion 40c, making it easier to operate the lever 400. As a result, it becomes easier to operate the engagement release operation using the lever 400.
  • the fifth modification of the first embodiment includes the first embodiment, the first modification of the first embodiment, the second modification of the first embodiment, the third modification of the first embodiment, Or, in order to explain only the points that are different from the fourth modification of the first embodiment, the same reference numerals are used for the same components as in FIG. 1, FIG. 6, FIG. 7A, FIG. 7B, or FIG. 8, and the explanation is omitted. .
  • FIG. 9 is a diagram showing crimping forceps as an example of forceps according to a fifth modification of the first embodiment of the present invention.
  • the lever 440 has a lever hole portion 40a, a lever end face finger rest portion 40b having an oval ring shape, an elongated hole 42, and a lever intermediate finger rest portion 40c.
  • the lever end surface finger hook portion 40b and the lever intermediate finger hook portion 40c extend from the proximal end of the crimping forceps 1 toward the distal end along the longitudinal axis of the lever 440 in a plane parallel to the axis of the hinge pin 14b.
  • the second claw member 28, the first claw member 19, the lever intermediate finger resting part 40c, the hinge part 14a, and the lever end face finger resting part 40b are arranged in this order. That is, the lever end surface finger rest part 40b is provided on the distal end side of the hinge part 14a, and the lever intermediate finger rest part 40c is provided on the proximal end side of the hinge part 14a.
  • the lever 440 is provided with the lever end surface finger hook portion 40b on the distal side of the hinge portion 14a, and the lever end surface finger hook portion 40b is provided on the proximal side of the hinge portion 14a.
  • An intermediate finger rest portion 40c is provided. Therefore, by providing the lever 440 with both the lever end surface finger resting part 40b and the lever intermediate finger resting part 40c, even if the person operating the crimping forceps 1 has small hands, he or she can place the index finger operating the lever 440 in the lever middle position. Since the lever 440 can be easily and reliably hung on the finger rest 40c, it becomes easier to operate the lever 440.
  • the index finger can be attached to the outer periphery of the tip side of the ring-shaped lever end surface finger rest part 40b without forcibly bending the index finger. can be applied. That is, the range of hand sizes that can operate one forceps can be expanded.
  • FIG. 10 is a diagram showing crimping forceps, which is an example of forceps according to the second embodiment of the present invention.
  • FIG. 11A is a partially enlarged view showing a part of the crimping forceps according to the second embodiment of the present invention.
  • FIG. 11B is a partially enlarged view showing a further enlarged part of the crimping forceps according to the second embodiment of the present invention.
  • FIG. 12 is a diagram illustrating the engagement release operation of the crimping forceps according to the second embodiment of the present invention, and is a partially enlarged view showing a part of the crimping forceps.
  • the second base end portion 23 has a substantially triangular plate-shaped protrusion portion 123b that protrudes toward the stopper portion 13c of the first arm 10 on the distal end side of the second base end portion 23.
  • two T-shaped plates are arranged in parallel along the longitudinal direction L when viewed in the axial direction of the hinge pin 14b, including the protrusion 123b from the distal end side to the proximal end side of the second base end portion 23.
  • a groove portion 123d is provided so that the second base end portion 23 is bifurcated midway between the base end and the distal end thereof.
  • the T-shape includes a substantially T-shape.
  • the first claw member 19 has a second claw portion 128a extending from the distal end of the first claw member 19 to the middle between the distal end and the proximal end on the curved concave inner peripheral edge 19a facing the first intersection portion 14.
  • a plurality of first claw portions 119c having the same function as the first claw portions 19c in the first embodiment are provided so as to be engaged with the first claw portions 119c, which have a saw blade shape and are continuous at equal intervals.
  • a second claw member 128 and a torsion coil spring 129 which is an example of an elastic member, are provided on the distal end side of the first claw member 19 and between the second base end portion 23 and the second intersection portion 24 of the second arm 20. They are arranged adjacent to each other in this order from the proximal end to the distal end.
  • the first claw member 19 extends through the groove 123d of the straight portion between the second intersection portion 24 and the second base end portion 23 of the second arm 20. In this state, it is arranged in the groove 123d of the protrusion 123b of the second arm 20 so as to be adjacent to the distal end side of the first claw member 19.
  • the second claw member 128 has an axis in a direction perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b, and is supported by a first pin 28c that is supported by one plate forming the protrusion 123b.
  • the first pin 28c is rotatably supported around the axis of the first pin 28c.
  • the second claw member 128 can rotate forward and backward around the axis of the first pin 28c in the groove 123d within a plane parallel to the plane around the axis of the hinge pin 14b.
  • the second claw portion 128a of the second claw member 128 is arranged to mesh with the first claw portion 119c.
  • the second claw member 128 is configured such that the first claw member 19 passes through the groove portion 123d of the straight portion between the second intersection portion 24 and the second base end portion 23 of the second arm 20. It is arranged in the groove 123d so as to be adjacent to the second intersection 24 side of the first claw member 19 in an extended state.
  • a second claw portion 128a having the same function as the second claw portion 28a in the embodiment is provided so as to be able to engage with the first claw portion 119c.
  • the torsion coil spring 129 which has the same function as the torsion coil spring 29 in the first embodiment, is arranged between the second claw member 128 and the second claw member 128 in the groove portion 123d in order for the torsion coil spring 129 to apply a biasing force to the second claw member 128. It is arranged so as to be disposed between the inner wall (locking wall 23e) at the distal end side of the second proximal end side member 21, that is, at the boundary with the second intersection 24. That is, the torsion coil spring 129 has an axis in the coil portion in a direction perpendicular to a plane parallel to the plane around the axis of the hinge pin 14b, and is supported by the two plates forming the protrusion 123b. It is pivotally supported by a second pin 29a.
  • One end of the torsion coil spring 129 is locked to the second arm 20 by a locking wall 23e provided at the boundary between the groove 123d and the second intersection 24. Further, the other end of the torsion coil spring 129 is connected to the side surface of the second claw member 128 on the base end side of the second arm 20 .
  • the torsion coil spring 129 rotates the second claw member 128 around the axis of the first pin 28c so that the first claw part 119c and the second claw part 128a are engaged with each other.
  • a biasing force toward the first claw member 19 is exerted against the first claw member 19 .
  • the torsion coil spring 129 exerts a biasing force toward the first claw member 19 against the second claw member 128, so that the engaged state of the first claw portion 119c and the second claw portion 128a is maintained.
  • the rotation angle between the first arm 10 and the second arm 20 is maintained.
  • the elastic member is a torsion coil spring, but the present invention is not limited to this. Any elastic member may be used as long as it can apply a biasing force toward the first claw member 19 to the second claw member 128 .
  • the projection 41 is activated by the biasing force of the torsion coil spring 129 when the first claw 119c and the second claw 128a are engaged with each other due to the connection between the lever hole 40a and the connecting projection 28b of the second claw member 128. , via the second claw member 128, is locked at or located near the end of the elongated hole 142, which has the same function as the elongated hole 42 in the first embodiment.
  • the projection 41 is formed in the elongated hole 142 when the engagement between the first claw part 119c and the second claw part 128a is released due to the connection between the lever hole part 40a and the connecting protrusion 28b of the second claw member 128. It is locked at the proximal end or located near the end. That is, the lever 140 is moved so that the protrusion 41 moves relative to the elongated hole 142 between the distal end or the vicinity of the end and the proximal end or the vicinity of the end of the elongated hole 142. Then, the first claw part 119c and the second claw part 128a are engaged or disengaged.
  • the lever 140 releases the engagement between the first claw part 119c and the second claw part 128a against the biasing force that the torsion coil spring 129 applies to the second claw member 128. .
  • the lever 140 is moved toward the proximal end by the biasing force that the torsion coil spring 129 applies to the second claw member 128 without the force of moving it toward the distal end, and the lever 140 is moved between the first claw portion 119c and the second claw portion. 128a.
  • the shape of the lever end surface finger rest part 40b is such that, in the paper of FIGS. 10, 11A, and 12, the right index finger of a right-handed person is placed from the back to the front, or the left index finger of a left-handed person is placed from the front to the back. It has an insertable oval ring shape.
  • the shape of the lever end surface finger rest portion 40b is an elliptical ring shape into which a finger can be inserted in a direction perpendicular to a plane parallel to a plane around the axis of the hinge pin 14b.
  • orthogonal includes substantially orthogonal.
  • the thumb is inserted into the second finger ring portion 23a.
  • the ring finger is inserted into the first finger ring portion 13a.
  • the index finger between the thumb and ring finger is placed on the lever end surface finger hook 40b.
  • the second claw member 128 can be rotated counterclockwise in the plane of FIG. 10 by pushing the lever 140 with the index finger placed on the lever end finger hook 40b.
  • the second The pawl member 128 can be moved from the engaged position to the disengaged position.
  • the first claw part 119c and the second claw part 128a are unlocked, and the opening/closing angle between the first arm 10 and the second arm 20 is increased.
  • the first arm 10 and the second arm 20 can be relatively opened.
  • the crimping forceps 1 according to the second embodiment can be used with the index finger regardless of whether the person operating the forceps is right-handed or left-handed, compared to the forceps according to the prior art. Since it is only a push operation, the difference in operability can be reduced.
  • the first claw portion 119c and the second claw portion 128a can be engaged with each other by simply moving the lever 140 straight in the opening/closing operation plane instead of twisting it in a direction intersecting the opening/closing operation plane. This makes it easier to release the mesh when adjusting the angle of the opening/closing operation.
  • the first arm 10 and the second arm 20 are operated.
  • the thumb, the ring finger, and the index finger that operates the lever 140 all move to extend the fingers. Therefore, compared to the case where the engagement release operation is performed by pulling the lever 140, the action of bending the fingers and the action of stretching the fingers do not coexist, making it easier to prevent erroneous operations.
  • the forceps according to the above aspect of the present invention can be applied to various uses such as hemostasis, disinfection, grasping, traction, temporarily fixing an implant, or maintaining an incised state in surgery or treatment.

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Abstract

Les pinces selon la présente invention sont pourvues d'un premier bras ayant une première partie d'extrémité proximale, une première partie de support rotative et une première partie d'extrémité distale et d'un second bras ayant une seconde partie d'extrémité proximale, une seconde partie de support rotative et une seconde partie d'extrémité distale. Le premier bras et le second bras peuvent tourner normalement et inversement respectivement au niveau des parties de support rotatives correspondantes dans un plan parallèle à un plan autour d'un axe de rotation, et sont pourvus : d'un premier élément de griffe qui fait saillie dans une forme de type bande arquée entre la partie de support rotative du premier bras et la première partie d'extrémité proximale qui se trouve au-delà entre la partie de support rotative du second bras et la seconde partie d'extrémité proximale et a une première partie de griffe disposée sur l'une de la périphérie interne et de la périphérie externe de celle-ci ; un second élément de griffe qui a une seconde partie de griffe disposée à l'intérieur de celui-ci et est mis en mouvement par un élément élastique de façon à permettre à la première partie de griffe et à la seconde partie de griffe d'être mises en prise l'une avec l'autre ; et un levier qui est relié au second élément de griffe et est mobile de façon à déplacer le second élément de griffe vers une position de libération de mise en prise dans un plan parallèle au plan autour de l'axe de rotation.
PCT/JP2023/010311 2022-03-17 2023-03-16 Pinces WO2023176925A1 (fr)

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JP2012511409A (ja) * 2008-12-10 2012-05-24 シンセス ゲゼルシャフト ミット ベシュレンクテル ハフツング 皮膚‐骨鉗子
US20160074032A1 (en) * 2009-09-04 2016-03-17 Luis Jose Almodovar Rotational Action Needle Driver
US20160296246A1 (en) * 2015-04-13 2016-10-13 Novartis Ag Forceps with metal and polymeric arms

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FR2411601A1 (fr) * 1977-12-13 1979-07-13 Landanger Louis Davier chirurgical pouvant etre manie d'une seule main
US20040031131A1 (en) * 2002-08-14 2004-02-19 Great Neck Saw Manufacturers, Inc. Clamp
JP2012511409A (ja) * 2008-12-10 2012-05-24 シンセス ゲゼルシャフト ミット ベシュレンクテル ハフツング 皮膚‐骨鉗子
US20160074032A1 (en) * 2009-09-04 2016-03-17 Luis Jose Almodovar Rotational Action Needle Driver
US20160296246A1 (en) * 2015-04-13 2016-10-13 Novartis Ag Forceps with metal and polymeric arms

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