Endoscope wire driving device

Abstract

The present invention relates to an endoscope wire driving device in which the diameter of a wire driving device disposed in an operation unit is reduced in order to provide a good grip feeling and operability, which maximally secures a rotation radius for pulling and releasing a wire in order to compensate for a decrease in the rotation radius due to the reduction in the diameter of the wire driving device, and can maximally obtain the pulling and releasing length of the wire even at a small rotation operation angle of the wire driving unit.

Description

Endoscope wire drive device

[0001] The present invention relates to an endoscope wire driving device, and more specifically, to an endoscope comprising an operating grip portion and an insertion portion (insertion portion + curved portion), wherein a plurality of wires arranged inside the insertion portion extending from the operating grip to the curved portion are pulled / released by operating a knob provided on the endoscope operating grip, thereby inducing a bending motion of the curved portion.

[0002] Generally, an endoscope is a general term for medical instruments used to examine the inside of the body for medical purposes. Fiber endoscopes are highly flexible and easy-to-manipulate semi-solid instruments that allow observation of passages in the digestive system that were previously inaccessible. Made of bundles of thin glass fibers, they can be easily bent and twisted, emitting an intense light that illuminates every nook and cranny from front to back, allowing the examiner to see clearly.

[0003] Recently, minimally invasive surgical instruments have been added to these endoscopes to be used for collecting samples of cells or tissues, excising and removing polyps or tumors, and performing other procedures or surgeries.

[0004] Looking at the conventional general structure of the endoscope as described above, as shown in the attached drawing Fig. 1, it includes: an operating grip portion that can be held by hand; a cable-shaped insertion portion having an insertion portion at one end of the operating grip portion and a curved portion at the tip thereof; and a plurality of wires arranged inside the insertion portion extending from the operating grip portion to the curved portion to induce a bending motion of the curved portion according to the operation of a knob provided in the operating grip portion.

[0005] To explain the above driving unit in more detail, as shown in the attached drawing Fig. 2, it may be configured to include: a circular driving plate (21) rotatably mounted within the operating grip portion (10); a pair of fixing pins (22) inserted and fixed at the two end sides facing each other around the axis on one side of the circular driving plate (21); and wire guides (23) each provided on the inner sides of the operating grip portion (10) in the direction of the pair of fixing pins (22).

[0006] In the above-described conventional endoscope, the respective ends of wires 1 and 2 (30') (30"), which are wires that extend from the insertion part, which is an endoscope cable coupled to one end of the operating grip part (10), are guided by wire guides (23) on each side, and are fixed by the fixing pin (22) by passing through a portion of the circumference on both sides of the circular driving plate (21). Depending on the forward and reverse rotation operation of a separate knob mounted on the circular driving plate (21), the wires 1 and 2 (30') (30") connected to both sides of the circular driving plate (21) are pulled or released, thereby inducing the bending motion of the aforementioned curved part.

[0007] However, in the above-mentioned conventional endoscope, the size of the operating grip portion (10) is determined according to the diameter of the wire driving portion (20). Therefore, if the diameter of the wire driving portion (20) is large, the size of the operating grip portion (10) also increases. When the size of the operating grip portion (10) increases in this way, there is a problem that it is inconvenient for the endoscope user (operator) to hold it with their hand and the operability is reduced.

[0008] In addition, in the above-mentioned conventional endoscope, the two sides to which the wires 1 and 2 (30') (30") are fixed and the wire guide (23) are located in a nearly straight line, so the length of the wires 1 and 2 (30') (30") being pulled or unwound is only about the length of the circumference according to the rotation angle of the circular drive plate (21). Therefore, in order to increase the length of the wires 1 and 2 (30') (30") being pulled or unwound, the rotation angle of the circular drive plate (21) must be increased, which results in a problem of low driving operability of the wires.

[0009] The present invention relates to an endoscope wire drive device. The purpose of the invention is to provide an endoscope wire drive device that reduces the diameter of a wire drive device disposed within the operating part (handle) to provide good grip and operability through the miniaturization of the endoscope operating part (handle), and to compensate for the reduction in the rotation radius resulting from the reduction in the diameter of the wire drive device by maximizing the rotation radius (driving radius) for pulling and unwinding the reduced wire, while also enabling the maximum pulling and unwinding length of the wire even at a small rotation angle of the wire drive device.

[0010] The present invention, for achieving the above-mentioned purpose, relates to an endoscope wire driving device that creates a bending motion of the tip of the insertion part by performing a pulling / releasing motion on a pair of wires that are axially mounted inside the operating part of an endoscope and extend from the operating part to the tip of the insertion part of the endoscope inserted into the body, the device comprising: an eccentric rotary cam having a protruding curved surface formed on both sides having a short axis centered on the axial part and a long axis in the direction of the insertion part among directions perpendicular to the short axis, and rotating left and right according to the rotational operation of a knob mounted on the operating part; a wire guide groove formed along the side portion of the eccentric rotary cam from the tip of the protruding edge of the protruding curved surface, with one end fixed to both sides in the direction of the short axis of the eccentric rotary cam, for guiding each of the pair of wires to separate and to both sides; and a pair of fixing pins inserted and coupled to both sides in the direction of the short axis of the eccentric rotary cam, for fixing each of the pair of wires guided to the wire guide groove after tension adjustment. and may include a wire guide provided in the operating part at a distance from the leading edge of the protruding curved surface, which guides the pair of wires to perform pulling and releasing operations in a closely parallel state between the leading edge of the protruding curved surface and the insertion part.

[0011] The eccentric rotary cam of the present invention may comprise: an axial member protruding from the center of one side (upper surface) of a circular block; a protruding curved surface formed so as to protrude in a curved manner toward the insertion part at the upper end of one side of the circular block; and fixing pin fastening portions protruding from both sides perpendicular to the protruding curved surface with respect to the axial member.

[0012] The shaft member of the present invention may include: a circular shaft projection vertically protruding from the center of one side of the circular block; a polygonal projection provided at the tip of the shaft projection to which the shaft of the knob is fitted; and a through hole vertically penetrating the circular block and the shaft projection to which the rotation axis of the operating part is rotatably fitted.

[0013] The protruding curved surface of the present invention may protrude horizontally from a vertical projection formed on the outer edge in the direction of the insertion part of the circular block from the fixing pin fastening portions on both sides, and the wire guide groove may be formed on the protruding curved outer edge portion.

[0014] The fixing pin fastening portion of the present invention may include: a pin groove formed on the upper surface of the circular block body into which the tip of the fixing pin is inserted; a ring protruding upward having a diameter larger than the pin groove; and a wire slit provided on the side of the ring to guide the tip of each of a pair of wires guided along the wire guide groove toward the fixing pin.

[0015] The pin groove of the present invention may have screw threads formed on the groove itself or on the inner diameter of the groove.

[0016] The fixing pin inserted into the pin groove and the ring of the present invention may be fixed by a fixing bolt that penetrates the rear surface of the ring and is tightened.

[0017] In the present invention, the wire guide groove may comprise: a groove formed along the side portion of an eccentric rotating cam from the leading edge of the protruding curved surface; and a blocking member provided on the outer side adjacent to the portion where the fixing pin is fastened, in the path where the groove is formed.

[0018] The blocking member of the present invention may not extend beyond a virtual straight line between the shaft mounting portion and the wire guide when the eccentric rotating cam rotates and moves to a position in the direction where the protruding curved surface was located.

[0019] In the present invention, the pair of fixing pins may comprise: a head having a driver slit formed therein; a pin fitted into a pin groove formed at both ends of one side of the eccentric rotating cam; and a wire hole provided through the middle part of the pin, into which the leading ends of each of the induced pair of wires are fitted and coupled.

[0020] The pin of the present invention may have screw threads formed on its outer diameter and be coupled in a corresponding manner with the screw threads formed on the inner diameter of the pin groove by rotational tightening.

[0021] The fixing pin of the present invention may be fixed after adjusting the tension while winding the combined wire through rotational operation.

[0022] In the present invention, the wire guide may comprise: a bridge protrudingly formed in the middle portion between the eccentric rotary cam and the insertion portion of the operating part connected thereto; and a guide member provided at a distance from the bridge.

[0023] The guide member of the present invention may be a pair of guide grooves formed on the upper part of the bridge.

[0024] The guide member of the present invention may be a first, second, and third pulley provided at a distance from the upper part of the bridge.

[0025] The first and second pulleys of the present invention may wrap around one side wire to prevent detachment, and the second and third pulleys may wrap around the other side wire to prevent detachment.

[0026] The present invention reduces the diameter of an eccentric rotating cam disposed within the operating part to increase grip by reducing the size of the endoscope operating part, and provides a protruding curved surface on one end of the eccentric rotating cam to compensate for the reduced rotation radius resulting from such diameter reduction, thereby minimizing or even increasing the reduction in the rotation radius of the eccentric rotating cam, so as to obtain the effect of maximizing the pulling and unwinding length of the wire at the same rotational operating angle.

[0027] The present invention achieves the effect of increasing the space utilization of the operating part by reducing the diameter, that is, the size, of the eccentric rotary cam as described above, thereby maximizing the space inside the operating part.

[0028] FIG. 1 is a perspective view illustrating the structure of a conventional endoscope.

[0029] FIG. 2 a) and 2b) are plan views illustrating the configuration and operation of a conventional endoscope wire drive device.

[0030] FIG. 3 is a perspective view illustrating an example in which the present invention is applied to an endoscope operating part.

[0031] FIG. 4 is an exploded perspective view illustrating the configuration of the present invention.

[0032] FIGS. 5a) and 5b) are plan views illustrating the configuration and operation state of the present invention.

[0033] FIGS. 6a) and 6b) are contrast diagrams to explain the difference in diameter and radius between the prior art and the present invention.

[0034] FIG. 7 is a plan view illustrating the action of force and the pulling distance when the wire driving device of the present invention pulls a wire.

[0035] FIG. 8 is a plan view illustrating another example of a wire guide in the present invention.

[0036] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are assigned the same reference numeral, and redundant descriptions thereof will be omitted. Furthermore, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted.

[0037] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0038] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0039] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0040]

[0041] The present invention will be described in detail below with reference to the attached drawings.

[0042] As shown in the attached drawings FIGS. 3 to 5, the endoscope wire driving device (100) of the present invention is axially installed inside the operating part (1) of the endoscope and performs a pulling / releasing operation on a pair of wires (7) that extend from the operating part (1) to the tip of the insertion part (5) of the endoscope inserted into the body, thereby creating a bending motion of the tip of the insertion part (5); the device comprises: an eccentric rotating cam (110) having a protruding curved surface (112) formed on both sides centered on the axial part and having a long axis in the direction of the insertion part (5) among directions perpendicular to the short axis, and rotating left and right according to the rotational operation of a knob (3) mounted on the operating part (1);

[0043] It may include: a wire guide groove (120) formed along the side portion of the eccentric rotating cam (110) from the leading edge of the protruding curved surface (112) to guide each of the pair of wires (7) to separate and guide them to both sides so that one end is fixed to both sides in the short direction of the eccentric rotating cam (110); a pair of fixing pins (130) inserted and coupled to both sides in the short direction of the eccentric rotating cam (110) to fix each of the pair of wires (7) guided to the wire guide groove (120) after tension adjustment; and a wire guide (140) provided in the operating portion (1) at a distance from the leading edge of the protruding curved surface (112) to guide the pair of wires (7) to perform pulling and releasing operations in a close parallel state between the leading edge of the protruding curved surface (112) and the insertion portion (5).

[0044] As shown in Figure 5a of the attached drawings, the present invention is such that, under normal conditions, the tip of the protruding curved surface (112) of the eccentric rotating cam (110) is positioned in the direction of the center where the wire guide (140) is located, and a pair of wires (7) each coupled to both sides of the eccentric rotating cam (110) are guided in a straight line toward the insertion part (5) coupled to one end of the operating part (1), spaced apart and parallel along the middle part of the operating part (1).

[0045] At this time, when the user rotates the knob (3) outside the above-mentioned control unit (1) in one direction, for example, clockwise, as shown in Fig. 5b), the eccentric rotating cam (110) also rotates clockwise, pulling the wire (7) on one side and releasing the wire (7) on the other side, so that the curved part located at the end of the insertion unit (5), although not shown, bends in one direction.

[0046] Of course, at this time, if the knob (3) of the above-mentioned control unit (1) is rotated to the right, the above-mentioned curved part will bend to the right through the above-mentioned operation.

[0047] Before explaining the detailed configuration and operation of the present invention as described above, to briefly describe an example of an endoscope operating unit (1) to which the present invention is applied, the operating unit (1) may include: a pair of housings (only one housing is shown in FIG. 3) that are coupled facing each other to form a head portion and a grip portion and are coupled from both sides; a knob (3) that is rotatably disposed on the outside of one side of the housing in the direction of the head portion and is axially coupled with the eccentric rotating cam (110); an insertion part (5) including an endoscope insertion part connected to the end of the grip portion, a curved part, and an end effector provided at the tip of the curved part; a connection part including a wire connected to one side of the head portion and a connector that is electrically connected to a separately provided input / output device; and a control part disposed within the housing and providing a function to transmit and receive information and processing signals related to endoscope operation, including a function to transmit information collected through the insertion part including the end effector to the input / output device through the connection part (see FIG. 1).

[0048] The endoscope operating unit (1) of the present invention may also be additionally equipped with or connected to additional functional units such as an eyepiece, a visual adjustment ring, a forceps connection unit, and a transmission and transmission button unit (see FIG. 1).

[0049] The detailed configuration and operation of the present invention are described below.

[0050] First, the eccentric rotating cam (110) of the present invention may include: an axial member (111) protruding from the center of one side (upper surface) of the circular block; a protruding curved surface (112) formed so as to protrude in a curved manner toward the insertion part (5) at the upper end of one side of the circular block; and a fixing pin fastening part (113) protruding from both sides perpendicular to the protruding curved surface (112) centered on the axial member.

[0051] The above-mentioned eccentric rotating cam (110) is a primary element that drives the pulling and unwinding operation of the pair of wires (7) by rotating left and right by the rotational operation of the knob (3) placed outside the above-mentioned operating part (1).

[0052] In order to increase the grip by reducing the size of the above-mentioned operating part (1), it is structurally advantageous to have a small diameter of the above-mentioned eccentric rotating cam (110), so it is desirable to reduce the diameter of the above-mentioned eccentric rotating cam (110). However, in this case, the radius of rotation is also reduced, so there is a disadvantage that the pulling and unwinding length of the above-mentioned wire (7) is shortened at the same rotational operation angle. In order to resolve this, the present invention forms the above-mentioned protruding curved surface (112) so that the reduction of the radius of rotation of the above-mentioned eccentric rotating cam (110) can be minimized or even increased.

[0053] The protruding curved surface (112) as described above is protruded in the direction of the insertion part (5) coupled to one end of the operating part (1) and rotates left and right, so interference such as colliding with or rubbing against the inner wall is prevented even when rotating within the operating part (1) with reduced size.

[0054] At this time, the shaft member (111) of the present invention described above may include: a circular shaft projection (111a) vertically protruding from the center of one side of the circular block; a polygonal projection (111b) provided at the tip of the shaft projection (111a); and a through hole (111c) vertically penetrating the circular block and the shaft projection (111a).

[0055] At this time, the shaft projection (111a) provides a portion where the rotation axis (1a) of the operating part (1) and the shaft of the knob (3) are joined, and may be a portion that causes rotation around the rotation axis (1a) of the operating part (1).

[0056] In addition, the polygonal projection (111b) is provided at the tip of the shaft projection (111a) to provide a portion into which the shaft of the knob (3) is inserted and coupled. At this time, the shaft of the knob (3) may have a polygonal groove formed corresponding to the polygonal projection (111b) so as to be coupled to each other.

[0057] In addition, the through hole (111c) is such that the rotation shaft (1a) of the operating part (1) is rotatably fitted therein, and the rotation shaft (1a) may be rotatably connected in a state where it is protruding above the through hole (111c) and is prevented from detaching by a connecting screw (not shown) that penetrates the shaft of the knob (3).

[0058] Additionally, the protruding curved surface (112) of the present invention described above may protrude horizontally from a vertical projection formed on the outer edge of the insertion part (5) of the circular block body from the fixing pin fastening part (113) on both sides, and the wire guide groove (120) may be formed on the protruding curved outer edge part.

[0059] The protruding curved surface (112) of the present invention is provided to protrude to compensate for the reduction in the rotation radius of the eccentric rotating cam (110) with a minimized diameter to reduce the size of the operating part (1), thereby minimizing or even increasing the reduction in the rotation radius of the eccentric rotating cam (110), so that the pulling and unwinding length of the wire (7) can be maximized at the same rotational operating angle.

[0060] To further explain, the structure of the present invention and the prior art as described above is described as a) and b) of the attached drawing 6.

[0061] Fig. 6a) is a conventional technology, and since the diameter 'D' of the circular driving plate (21) is large, the overall size of the operating grip portion (10) is inevitably large. However, as shown in Fig. 6b) of the attached drawing, the diameter of the eccentric rotating cam (110) is made relatively smaller compared to the conventional technology, so the overall size of the operating portion (1) can be minimized.

[0062] In addition, the present invention allows the protruding curved surface (112) to compensate for the reduction in the rotation radius caused by reducing the diameter of the eccentric rotating cam (110), thereby minimizing the reduction in the rotation radius of the eccentric rotating cam (110) or, if necessary, increasing it through a design change in the degree of protrusion.

[0063] That is, the rotation radius 'R' of the eccentric rotating cam (110) of the present invention may be equal to or even larger than the radius 'r' of the circular driving plate (21) of the prior art.

[0064] Additionally, the fixing pin fastening portion (113) of the present invention described above may include: a pin groove (113a) formed on the upper surface of the circular block body to which the tip of the fixing pin (130) is inserted; a ring (113b) protruding upward having a diameter larger than that of the pin groove (113a); and a wire slit (113c) provided on the side of the ring (113b) to guide the tip of each of a pair of wires (7) guided along the wire guide groove (120) toward the fixing pin (130).

[0065] At this time, the pin groove (113a) may be the groove itself or have screw threads formed on the inner diameter of the groove.

[0066] In the present invention, the pin groove (113a), which is the groove itself, may provide a portion into which the pin (132) of the fixing pin (130) is inserted.

[0067] In addition, in the case of the pin groove (113a) in which the inner diameter of the groove is formed with screw threads, the present invention may provide a portion in which a tightening connection is formed by the pin (132) of the fixing pin (130), in which screw threads are formed on the outer diameter, being screw-coupled.

[0068] In addition, in the present invention, the ring (113b) has a diameter into which the head (131) of the fixing pin (130) can be inserted. When the head (131) of the fixing pin (130) is inserted into the ring (113b), a space is formed between the inner diameter of the ring (113b) and the outer diameter of the pin (132) of the fixing pin (130). The space can provide a space in which the wire (7) inserted into the wire hole (133) formed in the pin (132) of the fixing pin (130) can be wound.

[0069] Additionally, the fixing pin (130) inserted into the pin groove (113a) and the ring (113b) may be fixed by a fixing bolt (113d) that penetrates the rear surface of the ring (113b) and is tightened.

[0070] The fixing bolt (113d) of the present invention, as described above, can prevent rotation caused by external pressure of the fixing pin (130) which is fixed in a state where the tension of the wire (7) is adjusted, such as rotation caused by the force applied during the pulling and releasing operation of the wire (7).

[0071] Meanwhile, the wire guide groove (120) of the present invention may include: a groove (121) formed along the side portion of the eccentric rotating cam (110) from the leading edge of the protruding curved surface (112); and a blocking member (122) provided on the outer side adjacent to the portion where the fixing pin (130) is inserted and fastened along the path where the groove (121) is formed.

[0072] The wire guide groove (120) of the present invention, as described above, guides each of the left and right pairs of wires (7) to move to the correct position when the eccentric rotating cam (110) rotates left and right, while also preventing detachment.

[0073] At this time, it may be preferable that the blocking member (122) of the present invention does not go beyond the imaginary straight line between the shaft mounting portion and the wire guide (140) when the eccentric rotating cam (110) rotates and moves to the position where the protruding curved surface (112) was located.

[0074] If the blocking member (122) part crosses the imaginary straight line between the shaft part and the wire guide (140), the wire (7) located in that part is pulled in the same way as the wire (7) pulled in the opposite direction. However, since a pair of wires (7) cannot be pulled in this way, the pair of wires (7) are not pulled and stop, that is, rotational operation of the eccentric rotating cam (110) becomes impossible.

[0075] In addition, the fixing pin (130) of the present invention may comprise: a head (131) having a driver slit formed therein; a pin (132) that is fitted into a pin groove (113a) that forms a fixing pin fastening portion (113) formed on both sides of one side of the eccentric rotating cam (110); and a wire hole (133) that is provided through the middle part of the pin (132) so that the tip of each of the induced pair of wires (7) is fitted and coupled thereto.

[0076] The pin (132) of the present invention described above may have a screw thread formed on its outer diameter and may be coupled to the screw thread formed on the inner diameter of the pin groove (113a) by rotational tightening.

[0077] In addition, the fixing pin (130) of the present invention described above may be fixed after adjusting the tension while winding the combined wire (7) around the outer diameter through rotational operation.

[0078] At this time, the pin (132) of the fixing pin (130) can be inserted into the pin groove (113a) of the fixing pin fastening portion (113) and then firmly fixed by the tightening pressure of the fixing bolt (113d).

[0079] In addition, if a screw thread is formed on the outer diameter of the pin (132) of the fixing pin (130), the inner diameter of the groove is joined to the pin groove (113a) with the screw thread through screw tightening, thereby maintaining a fixed state, and furthermore, it can be fixed more firmly by the tightening pressure of the fixing bolt (113d).

[0080] In addition, the wire guide (140) of the present invention may include a bridge (141) protruding from the middle portion between the eccentric rotating cam (110) and the end portion where the insertion portion (5) formed on the operating portion (1) is connected; and a guide member (142) provided at a distance from the bridge (141).

[0081] The wire guide (140) of the present invention stably supports the operation of the left and right pair of wires (7) located between the eccentric rotating cam (110) and the insertion part (7) being pulled or released by the rotation of the eccentric rotating cam (110).

[0082] As shown in the attached drawing Fig. 7, the present invention as described above is provided in the middle portion between the eccentric rotating cam (110) and the end portion where the insertion portion (5) formed in the operating portion (1) is connected. In this state, when the eccentric rotating cam (110) rotates to pull the wire (7) in an inclined manner as if pulling it clockwise, that is, in the left side direction, the length of the pull can be secured longer even at the same rotational operating angle as a circular driving plate of the prior art.

[0083] The principle is as follows.

[0084] The portion of the wire (7) located in the wire guide (140) and the portion of the wire (7) pulled clockwise by the eccentric rotating cam (110) are inclined. If the portion of the wire (7) that is inclined as described above is denoted as 'z', a virtual line extending horizontally from the portion of the wire (7) located in the wire guide (140) is denoted as 'x', and a virtual line extending vertically from the portion of the wire (7) pulled by the eccentric rotating cam (110) is denoted as 'y', then 'x', 'y', and 'z' form a right triangle.

[0085] According to the Pythagorean theorem, "in a right triangle, the square of the hypotenuse 'z' is equal to the sum of the squares of the other two sides 'x' and 'y'."

[0086] Accordingly, the length of the wire (7) that is pulled obliquely as if pulled clockwise by the eccentric rotating cam (110) of the present invention is pulled to a relatively longer length compared to being pulled close to a straight line (corresponding to 'y' in FIG. 7) as in the conventional technology, so the pulling length can be secured longer even at the same rotational operation angle as a circular driving plate as in the conventional technology.

[0087] At this time, the guide member (142) of the present invention may be a pair of guide grooves formed on the upper part of the bridge (141).

[0088] In addition, the guide member (142) of the present invention described above may be a first, second, and third pulley (142a) (142b) (142c) spaced apart on the upper part of the bridge (141), as shown in the attached drawing FIG. 8.

[0089] At this time, the first and second pulleys (142a) (142b) of the present invention may wrap around one side wire (7') to prevent detachment, and the second and third pulleys (142b) (142c) may wrap around the other side wire (7") to prevent detachment.

[0090] The guide member (142) of the present invention, as described above, can fundamentally prevent the wire (7) from coming off and can induce smooth pulling and unwinding of the wire (7), and can minimize wear of the wire (7) due to friction during the pulling and unwinding operation as described above.

[0091]

[0092] The technical features disclosed in each embodiment of the present invention are not limited to that embodiment only, and as long as they are not mutually incompatible, the technical features disclosed in each embodiment may be combined and applied to different embodiments.

[0093] Therefore, in each embodiment, the technical features are described primarily, but as long as the technical features are not mutually incompatible, they may be combined and applied together.

[0094] The present invention is not limited to the embodiments described above and the attached drawings, and various modifications and variations may be possible from the perspective of those skilled in the art to which the present invention belongs. Accordingly, the scope of the present invention should be defined not only by the claims of this specification but also by equivalents thereof.

Claims

1. An endoscope wire driving device that creates a bending motion of the tip of the insertion part by performing a pulling / releasing motion on a pair of wires that are formed inside the operating part of the endoscope and extend from the operating part to the tip of the insertion part of the endoscope inserted into the body, An eccentric rotary cam having short axis sections on both sides centered on the shaft section, and a protruding curved surface having a long axis in the direction of the insertion section among directions orthogonal to the short axis sections, which rotates left and right according to the rotational operation of a knob mounted on the operating section; A wire guide groove formed along the side portion of the eccentric rotating cam from the leading edge of the protruding edge of the protruding curved surface, which guides each of the pair of wires, each having one end fixed to both sides in the short axis direction of the eccentric rotating cam, to separate and guide each other to both sides; A pair of fixing pins inserted and coupled to both sides of the short axis direction of the above-mentioned eccentric rotary cam, and fixing each of a pair of wires guided into the wire guide groove after tension adjustment; and A wire guide provided in the operating part at a distance from the leading edge of the protruding curved surface, guiding the pair of wires to perform pulling and releasing operations in a closely parallel state between the leading edge of the protruding curved surface and the insertion part; Endoscope wire drive device.

2. In Paragraph 1, The above-mentioned eccentric rotary cam is, An axial member protruding from the center of one side of a circular block; A protruding curved surface formed such that the upper portion of one side of the above circular block protrudes in a curved manner toward the insertion part; and A fixing pin fastening portion protrudingly provided on both sides perpendicular to the protruding curved surface, centered on the shaft member; Endoscope wire drive device.

3. In Paragraph 2, The above-mentioned shaft member is, A circular axial projection vertically protruding from the center of one side of the above-mentioned circular block; A polygonal projection provided at the tip of the above-mentioned shaft projection; and A through hole provided that vertically penetrates the above-mentioned circular block and shaft projection; comprising Endoscope wire drive device.

4. In Paragraph 2, The above protruding curved surface is, A vertical projection formed on the outer edge in the direction of the insertion part of the circular block from the fixed pin fastening portions on both sides above is protruded horizontally, and the wire guide groove is formed on the protruding curved outer edge portion. Endoscope wire drive device.

5. In Paragraph 2, The above-mentioned fixing pin fastening portion is, A pin groove formed on the upper surface of the circular block and into which the tip of the fixing pin is inserted; A ring protruding upward and having a diameter larger than the above pin groove; and A wire slit provided on the side of the above ring, guiding the tip of each of a pair of wires guided along the wire guide groove toward the fixing pin; Endoscope wire drive device.

6. In Paragraph 5, The above pin groove is, Threads formed on the groove itself or the inner diameter of the groove Endoscope wire drive device.

7. In Paragraph 5, The fixing pin inserted into the above pin groove and ring is secured by a fixing bolt that penetrates the rear surface of the above ring and is tightened. Endoscope wire drive device.

8. In Paragraph 1, The above wire guide groove is, A groove formed along the side portion of the eccentric rotating cam from the leading edge of the protruding edge of the above-mentioned protruding curved surface; and A blocking member provided on an outer side adjacent to the portion where the fixing pin is fastened, in the path where the groove is formed; Endoscope wire drive device.

9. In Paragraph 8, The above blocking member is, When the above eccentric rotary cam rotates and moves to the position where the above protruding curved surface was located, it does not go beyond the imaginary straight line between the above shaft mounting portion and the above wire guide. Endoscope wire drive device.

10. In Paragraph 1, The above fixing pin is, A head with a driver slit formed therein; A pin fitted into a pin groove formed at both ends of one side of the above-mentioned eccentric rotating cam; and A wire hole provided through the middle portion of the pin, into which the tip of each of the induced pair of wires is fitted; Endoscope wire drive device.

11. In Paragraph 10, The above pin is, A screw thread is formed on the outer diameter and corresponds to the screw thread formed on the inner diameter of the pin groove by rotational tightening. Endoscope wire drive device.

12. In Paragraph 1, The above fixing pin is, The above combined wire is fixed after adjusting the tension while winding it through rotational operation. Endoscope wire drive device.

13. In Paragraph 1, The above wire guide is, A bridge protrudingly formed in the middle portion between the one end connecting the eccentric rotary cam and the insertion portion of the operating part; and Guide members provided at intervals on the above bridge; comprising Endoscope wire drive device.

14. In Paragraph 13, The above guide member is, A pair of guide grooves formed on the upper part of the above bridge, and The above pair of guide grooves is, Wrapping each of the pair of wires to prevent detachment Endoscope wire drive device.

15. In Paragraph 13, The above guide member is, First, second, and third pulleys spaced apart on the upper part of the above bridge Endoscope wire drive device.

16. In Paragraph 15, The above 1 and 2 pulleys wrap around one side wire to prevent detachment, and The second and third pulleys above wrap around the other wire to prevent detachment. Endoscope wire drive device.

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