Surgical sagittal blade cartridge with reinforced guide bar

Abstract

To provide a surgical sagittal saw cartridge including a guide bar formed by an inside plate having a head and outside plates facing each other.SOLUTION: A cartridge has blades arranged with respect to a head of an inside plate. The inside plate is formed so as to have an inside small portion and two outside small portions facing each other. The inside small portion is formed so as to define the head arranged with the blades facing each other. The outside small portions extend in front of the inside small portion in order to define a space of the outside small portions on which the blades are seated.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD

[0001] The present invention relates to a stationary guide bar and a blade head pivotally attached to the guide bar A surgical sagittal blade cartridge having the same. More specifically, the present invention relates to a reinforced surgical sagittal blade cartridge having a reinforced guide bar.

BACKGROUND ART

[0002] A sagittal saw blade is a surgical saw having a head that pivots about an axis orthogonal to the blade Saw. Patent Documents 1 and 2 each disclose a surgical saw blade cartridge . The disclosures of which are hereby incorporated by reference. Sagittal saw b The blade cartridge includes a stationary guide bar and a blade head. The guide bar is an elongate member that is removably attached to a handpiece that operates the cartridge, i.e., a saw . The blade head is pivotally attached to the guide bar and has teeth extending forward from the guide bar. One or more drive links extend from the blade head toward the proximal end of the guide bar . The drive link is reciprocated back and forth by a drive assembly within the saw . The reciprocating motion of the drive link causes the blade head to pivot back and forth . This pivoting of the blade head allows the teeth to cut the tissue against which the blade head is pressed . This type of cartridge is sometimes referred to as an oscillating tip saw blade cartrid ge.

[0003] An advantage of the sagittal blade cartridge is that the only pivoting portion of the cartridge is the distally positi oned blade head. By comparison, conventional sagittal saw blades have a blade It rotates from the mounting point of the saw to which it is attached. When the cartridge is activated, the handpie The surgeon's hand holding the blade vibrates only slightly. Also, using the cutting guide, the blade Properly positioning the sagittal saw blade relative to the tissue that the saw intends to excise is important. This is a common practice. When a conventional blade is activated, the oscillating motion of the blade causes Significant wear occurs on the surface of the cutting guide that defines the elongated hole where the blade sits. Surgical sagittal The guide bar of the blade cartridge moves only a very small amount within this elongated hole. Therefore, by using a cartridge instead of a conventional blade, the cutting guide can be shaped The material used will wear down very little from the guide. This allows the surgeon to This reduces the degree to which the reduced cutting guide material must be flush with the surgical site. This is possible. Furthermore, by using a vibrating tip blade, the material forming the guide is guide This can reduce the degree to which the drum itself wears down to the point of being useless.

[0004] Surgical sagittal blade cartridges have other advantages over conventional sagittal saw blades. Yes, the guide bar is stationary when the blade head is in motion. The operator uses one Alternatively, you can press two fingers against the guide bar. This will cause the cartridge to cut It is easy to hold the cartridge in the desired position when advancing towards the tissue to be cut. Yes.

[0005] When either a conventional sagittal blade or a sagittal blade cartridge advances into the bone, The lead head encounters resistance. This resistance becomes significant when the cut is deeper than 5 cm. In many cases, the bone located adjacent to the underside of the cartridge is directly above the cartridge. It provides greater cutting resistance than the bone it is located on. Like most mechanical devices, the cartridge, When moving forward, it moves along the path with the least resistance. The bone on top of the cartridge is the cartridge Because the cutting resistance is lower than that of the bone beneath the ridge, the cartridge advances to the desired cut. The blade may flex upwards. This upward flex of the blade is called "skiving." It is known as [this]. Also, depending on the bone density, the cartridge will cut across the cutting surface as it moves forward. It may also bend downwards. This type of bending is known as "diving." .

[0006] Regardless of the direction in which the blade bends, bending is undesirable. This is because the sagittal saw blade... A ridge is typically created by removing bone and filling the space that was occupied by the removed bone. Because an implant is attached. It is formed to have a surface designed to sit precisely on the complementary surface of the bone. If the cutting does not leave a surface with the desired shape on the bone, the implant attachment procedure will be performed. The result of the placement will likely not be optimal.

[0007] Theoretically, by increasing the thickness of the guide bar, the surgical sagittal blade cart can be improved. This will increase the rigidity of the ridge. However, the length of the cutting guide into which the cartridge is inserted It should be understood that the holes tend to be relatively narrow. In many cases, the height of this elongated hole is It is approximately 1.5 mm or less. This height is a guide for the cartridge that is inserted into this elongated hole. This will limit the thickness of the bar. Furthermore, if the thickness of the guide bar increases, this will Therefore, it is necessary to increase the cutting thickness formed by the cartridge. When the cutting thickness increases, the cartridge may produce a cut surface that does not have desired planar smoothness . Accordingly, increasing the thickness of the guide bar is usually not a feasible solution for reducing the deflection of the cartridge . [PRIOR ART DOCUMENTS] [PATENT DOCUMENTS]

[0008] [PATENT DOCUMENT 1] International Patent Application Publication No. 2006 / 017066A2 Pamphlet / U.S. Patent No. 7,497,860 Specification [PATENT DOCUMENT 2] International Patent Application Publication No. 2007 / 030793A2 Pamphlet / U.S. Patent No. 7,704,254 Specification [SUMMARY OF THE INVENTION]

[0009] The present invention relates to a new and useful surgical sagittal blade cartridge. The surgical sagittal blade cartridge is provided with a guide bar designed to be less prone to deformation when subjected to non-uniform resistance .

[0010] The surgical sagittal blade cartridge of the present invention includes a guide bar formed by three plates . An upper plate and a bottom plate facing the upper plate are provided . An inner plate is positioned between the upper plate and the bottom plate. The inner plate is formed to have a curved head. The curved head functions as a boss that serves as the center about which the blade head of the cartridge pivots .

[0011] In many aspects of the present invention, the inner plate has a base that forms the proximal end of the plate. It is formed in a uniform manner. Three small parts extend forward from the base. Two outer small parts and These are the inner parts, and these parts are spaced apart from each other in the lateral direction. The part is formed to have a curved head that functions as a swivel boss. Once the cartridge with the guide bar is assembled, a drive that rotates the blade head is activated. The link will be positioned within the space between the inner and outer sub-parts.

[0012] In some aspects of the present invention, the outer portion extends distally and anteriorly to the inner portion. Therefore, in these embodiments of the present invention, the outer small portion extends forward of the pivot boss. In these embodiments of the present invention, the base of the blade head is located outward (in front of the swivel boss). Please understand that these are positioned between mutually separated areas in the lateral subdivisions.

[0013] In an embodiment of the present invention in which the outer portion extends forward of the inner portion, the outer portions are directed toward each other. It was previously formed to have lobes extending inward. Therefore, the outer small portion of this These distal areas reinforce the guide bar and reduce the possibility of guide bar deflection. ru.

[0014] In some aspects of the present invention, the plate forming the guide bar is made of three different plates. These plates are welded together to form a guide bar or otherwise They are fixed by the method. In some aspects of the present invention, two of these plates The above describes how a single unit can be machined, molded, or otherwise manufactured. It is formed in this way.

[0015] The present invention is described in detail in the claims. The above and further features of the present invention The gain will be understood by reading the detailed explanation below in conjunction with the attached diagram. cormorant. [Brief explanation of the drawing]

[0016] [Figure 1] This is a perspective view of the assembly of the saw and surgical sagittal blade cartridge according to the present invention. [Figure 2] This is an exploded view of the cartridge of the present invention. [Figure 3] This is a plan view of the inner plate of the cartridge of the present invention. [Figure 4] This is a plan view of an alternative inner plate for the cartridge of the present invention. [Figure 5] This is a plan view of an alternative assembly integrated with the cartridge of the present invention. [Modes for carrying out the invention]

[0017] Figure 1 shows assembly 30 of the present invention. Assembly 30 is a surgical sagittal brace The saw 32 is equipped with a detachable cartridge 60. The saw 32 is attached to the main body or It comprises a housing 34. In the illustrated embodiment of the present invention, the housing 34 is It is shaped like a piston. Head 38 accepts the proximal end of cartridge 60. It is shaped like a sea urchin. (Here, "proximal" refers to the surgeon holding the saw 32.) It is understood that this means the direction away from the area to which cartridge 60 is applied. I want to. "Distal" is the side away from the surgeon holding the saw, i.e., the cart. (Please understand that this means the side towards the part to which Ridge 60 is applied). Connecting rod 40, It is slidably attached to the saw head 38 (Note that the head of the connecting rod 40 is shown in the figure) (When the connecting rod 40 is in the operating position, a part of the rod is pressed against the cartridge.) , holds the cartridge in the head. When the connecting rod 40 is in the loading position, the connecting rod 4 0 means that cartridge 60 is not pressed. This removes cartridge 60 from the head. The head can be removed, and a new cartridge can be detachably attached to the head. The wing nut 42 attached to it moves the connecting rod 40 between the operating position and the loading position. It is designed to allow this.

[0018] The motor 48, represented by a virtual cylinder, is located within the barrel of the housing 34. The motor 48 is connected to a pair of drive pins 50 (one of which has a part number). The drive pin 50 is attached to the head 38, and the cartridge 60 is seated there. They protrude above the surface. These drive pins 50 vibrate in opposite directions to each other. To perform this task, it is attached to the head 38. The trigger is located below the saw head 38. 52 is a manual actuation member that is pressed to control the operation of the saw. Motor 48 is energized. The power supply that provides the signal is not shown. In many cases, this power supply is located in the saw housing 34. This is a battery or power cord attached to the base of the gripping part.

[0019] The cartridge 60 shown in Figure 2 is a guide bar to which the blade 136 is attached. It is equipped with 62. The blade 136 is attached to the distal portion of the guide bar 62, there It extends forward from there. The drive link 112 extends proximally from both sides of the blade 136. The drive link 112 terminates in front of the proximal end of the guide bar 62.

[0020] Guide bar 62 is located on the bottom plate 64, and the inner plate is positioned on top of the bottom plate 64. A laminated structure comprising a plate 76 and an upper plate 102 positioned on top of the inner plate 76. Yes. Therefore, the inner plate 76 is between the two outer plates, i.e., the bottom plate 6 It is sandwiched between 4 and the upper plate 102. These plates together form a gas The side bar 62 is formed to have a proximal region 63. The proximal region 63 is plate It initially tapers outward from the proximal end, and then tapers inward. Proximal section In front of region 63, the guide bar has a central region 66 and a distal region 68. Rates 64, 76, and 102 are guide bars that form both sides of the central and distal regions 68. It is formed such that the sides facing each other are parallel. The central region 66 and distal of the bar The width across region 68 is equal to the width across the outward-facing tapered portion of the proximal region 63 of the bar. It's getting smaller too.

[0021] The bottom plate 64 has two laterally spaced apart from each other just anterior to its proximal end It is formed to have an opening 67 (one of which is labeled with a part number). The opening 67 is It is semi-elliptical. Each opening 67 has a curved perimeter that faces the proximal end of the plate, and a cartridge It has a linear perimeter that faces toward the distal end of the ridge. In front of the opening 67, the bottom plate The part is formed to have a keyhole-shaped opening 69. The opening 69 is the widest part of the opening The opening is shaped so that it can receive the head of the saw's connecting rod 40. 69 has its centerline aligned with the proximal-distal long axis along the guide bar 62. Rate 64 is positioned such that the narrow portion of the opening 69 is located distally and anterior to the wide portion of the opening. Further formation is being created.

[0022] The bottom plate 64 has two openings 70 on the proximal side of the distal plate (one of which is labeled with a part number). It is further formed so that the (is) is located. Each opening 70 is long to one of each of the openings 67. They are lined up in a straight line in the direction of the hand. The opening 70 has the same shape as the opening 67, and The orientation is opposite to that of opening 67. That is, the curved end of opening 70 is distal to It is oriented to face in that direction. The straight end of the opening 70 faces towards the proximal end of the plate 64. In front of the opening 70, the bottom plate 64 has two elongated sections that penetrate the plate. It is formed to have elongated holes 72 (one of which is numbered). Each elongated hole 72 is , (located near the end of the adjacent opening 70 and closest to the long axis of plate 64) It extends forward from the proximal end. Anterior to the proximal end, the elongated hole 72 is directed toward the lateral edge of the plate. It is curved outward. The elongated holes 72 are spaced apart from the distal end of the plate 64 towards the proximal end. It ends at a certain point.

[0023] As best shown in Figure 3, the inner plate 76 forms the proximal end of the plate It is formed to have a base portion 78. Three small portions 8 are spaced apart from each other in the lateral direction. Sections 0, 86, and 99 extend forward from the base 78. Smaller sections 80 and 99 are outer smaller sections. The outer surface of the small portion 80,99 is the same as the outer surface area of ​​the plate 76 of the guide bar 62. This is the outer surface. Therefore, the outer small portions 80 and 99 extend forward from the plate base 78. It has a proximal region, which initially slopes with an inward taper, and then with an outward taper. It is inclined in a curve. The outer small parts 80 and 99 are arranged symmetrically with respect to the long axis of the guide bar 62. It is placed there. The outer sub-parts 80 and 99 are further shaped to be mirror-symmetric to each other. Adjacent to the distal end of each sub-part 80, 99, each sub-part is located in the longitudinal direction of plate 76. It has tabs 82 (one of which is numbered) that extend inward toward the cardinal axis, It is formed. Proximal to tab 82, each small portion 80,99 is the length of plate 76. It has a lobe 84 (one of which is numbered) that extends inward toward the central axis in the hand direction. It is shaped in such a way. Along small sections 80 or 99, from the proximal to the distal, The associated lobe 84 curves inward first, and then outward. (Inner plate) 76 is formed such that the lobe 84 is spaced proximally away from the tab 82.

[0024] The inner small portion 86 of the inner plate 76 has its center line located on the long axis of the plate. The small portion 86 is formed to have a keyhole-shaped opening 90. The inner plate 76 is The opening 90 has the same shape as the opening 69 of the bottom plate 64, and is straight with the opening 69. They are shaped to be positioned in a line. The inner small portion 86 has its distal end removed Therefore, it has a certain width. At the most distal end, the small portion 86 has a curved distal surface. It has a head 95. Between this small portion of a certain width area and the head 95, The part has a neck 94. The neck 94 is curved inward relative to the head 95. It has aspects that confront the issue.

[0025] Since the sub-parts 80, 86, and 99 are spaced apart from each other, each of the outer sub-parts 80 and 99 and the inner sub-parts A long, narrow hole 96 is formed between the side portion 86 and the other portion, with one end closed. The proximal end is the closed end of the elongated hole. When the cartridge 60 is assembled, each elongated hole 96 is It is placed on each pair of openings 67, 70 of the bottom plate 64. The inner plate 76 is each length The proximal end portion 98 of the hole 96 has a shape substantially equal to the shape of the opening 67 of the bottom plate. It is further formed in this way. Therefore, the lateral width of the proximal end portion 98 of each elongated hole 96 is It is larger than the width of the elongated foramen 96 on the distal anterior side of the segment.

[0026] Returning to Figure 2, the upper plate 102 has substantially the same outer circumference as the outer circumference of the bottom plate 80. It is observed that it is shaped to have the following: anterior to the proximal end of the upper plate 102 The plate 102 has two openings 104 (one of which is labeled with a part number). It is shaped as follows. The opening 104 has the same shape as the opening 67 of the bottom plate, and the opening 6 It is positioned so as to be in a straight line with 7. In front of the opening 104, the upper plate The top is formed to have an elliptical opening 106. The upper plate 102 is a guide When the dobar 60 is assembled, the opening 106 is positioned above the opening 90 of the inner plate. The upper plate 102 is formed to surround the opening 90. It is further formed to define 8 (one of which is assigned a part number). Opening 108 It has the same shape as the opening 70 of the bottom plate, and is shaped to be aligned straight with the opening 70. It has been done.

[0027] The blade 136 is formed to have a web 142 located in the center. Code 136 has a web 142 that is no thicker than the thickness of the inner plate 76. The sea urchin is formed. The web 142 of the blade 136 shown in Figure 2 is roughly rectangular in shape. Therefore, when the blade 136 is positioned in the center of the guide bar 62, the web 142 The main axis is aligned with the main axis of the guide bar. The guide bar is proximal to web 142. It extends to the side and away from the long axis of the web. Blade 136 has two legs (one It is shaped to have (part numbers are assigned to it). The foot 138 is the thickness of the web 142 It has the same thickness. Each foot 138 extends to the open end of the adjacent elongated hole 96 of the inner small portion 86. It extends in that direction. The opening 140 penetrates each leg 138 in the vertical direction. Between the legs 138 Furthermore, the blade 136 is formed to have a curved proximal surface 144. The blade surface 144 of the do 136 is seated against the head 95 which is integrated with the inner small portion 86, It is shaped to be able to rotate around the head 95. Blade foot 13 8 and web 142 are sometimes referred to as the base of blade 136.

[0028] The distal end of the blade's web 142 extends to the distal end of the guide bar 60. The do 146 is integral with the distal end of the web 142 and extends forward of the distal end. Teeth 148 are formed on head 146. Blade 136 has head 146 web 14 It is further formed to have a thickness greater than the thickness of 2. More specifically, The head receives the guide bar 60, which is formed by the cutting action of the blade 136. It is formed to have a thickness sufficient for it to be absorbed.

[0029] Each drive link 112 is positioned in each of the elongated holes 96 of the guide bar 62. The ku 112 is in the form of a flat, elongated piece of metal. The drive link 112 is connected to the leg 114 (one Each foot is formed such that a part number is assigned to it and is located at the proximal end of each link. 114 has a through hole 116 (one of which is numbered) located in its center. The through hole 116 is formed in which the associated drive rod foot 114 drives the saw head. It is dimensionally designed to be attached to the 50. Each drive link 112 is attached to the foot 114 It is shaped to have a thickness greater than the thickness of the metal piece that forms the body of the link. The thickness of the foot 114 is usually not greater than the thickness of the guide bar 62. Cartridge 6 Once assembled, the foot 114 is substantially seated within the proximal end portion 98 of the associated elongated hole 96. The portion of the leg 114 that protrudes outward from the main body of each link 112 is located in the bottom plate opening 67. It is also seated within the upper plate opening 104.

[0030] Two fingers 118 (one of which is numbered) are attached to the body of each drive link 112. It extends distally and anteriorly from its distal end. The fingers 118 overlap each other, They are spaced apart from each other. More specifically, the finger 118 and the blade foot 138 each They are spaced far enough apart from each other that they can sit with their fingers facing each other. Each finger 118 has a hole 120 formed in it. The holes 120 are aligned in a straight line with each other.

[0031] As part of the process of assembling the cartridge of the present invention, blade 136 is each blade The drive foot 138 is positioned so as to be located between a pair of drive link fingers 118. The swivel pin 122 (one of which has a part number) passes through the finger hole 120 and the blade foot opening 140. (It is attached) but the leg 38 is held rotatably by the associated drive link 112 It is.

[0032] During the assembly of cartridge 60, the inner plate 76 first attaches to the bottom plate 64 or the top plate It is welded to rate 102 or fixed by other means. After this process is completed, The drive link / blade assembly is such that the drive link 112 is seated in the elongated hole 96 and the blade The curved proximal surface 144 of part 136 is integrated with the inner plate 76 and the curve of the small part head 95 It is then positioned so as to sit on the distal surface. Next, the upper plate 102 or The bottom plate 64 is welded to the exposed surface of the inner plate 76 or otherwise And it is fixed in place. At the end of the process of assembling the cartridge 60, the drive link leg 11 4 is seated within the plate openings 67, 104. The fingers 118 of the drive link are These are openings 70, 1 formed in the bottom plate 64 and the upper plate 102 of the guide bar. It is seated inside 08. The blade head 146 is positioned just in front of the distal end of the guide bar 62. It will happen.

[0033] As can be seen from Figures 1 and 2, the cartridge 60 is equipped with two parallel ribs 150. The rib 150 extends upward from the outer surface of the upper plate 102 of the bar. The ribs are positioned such that each rib is aligned straight with one of the major axes of the opening 104. The rib 150 extends forward from a position approximately 2 mm in front of the opening 104. 0 terminates approximately 10 mm forward of the plate opening 106. Rib 150 is on the upper side It is formed separately from plate 102. The rib 150 is welded to the rest of cartridge 60. It is designed to be permanently fixed by either being attached or by other means.

[0034] International Patent Application Publication No. 2013 / 016472A1 / U.S. Patent Application Publication No. 2014 / 0 As discussed in No. 163558, once the assembly 30 is ready for use Once aligned, the cartridge rib 150 will be positioned above the saw head 38. Yes. Furthermore, this document is explicitly included herein by reference. The rib 150 reduces deflection in the area of ​​the cartridge 60 located above the saw head 38. This will result in...

[0035] To prepare the assembly 30 of the present invention for use, the cartridge 60 is connected to the saw head 3 It is attached to 8. As a result of this attachment, each drive pin 50 is attached to the drive link leg 114 It seats in one of the holes 116 formed therein. The connecting rod 40 is positioned over the overlapping cartridges. It penetrates the openings 69, 90, and 106. The connecting rod 40 (without a part number) The head of the connecting rod is exposed on the surface of the inner plate 72 through the upper plate opening 106. It is lowered from above the guide bar to apply pressure. This pressing motion causes the cartridge The cartridge 60 is held in place by the saw head 38. Once the cartridge 60 is fixed to the drive head, The moving pin and drive link work together to bias the blade 136 proximal. The position surface 144 is biased against the curved surface of the head 95 inside the cartridge 60.

[0036] By pressing the trigger 52, assembly 30 is activated. As a result, The motor 44 is activated. When the motor 44 is activated, the drive pin 50 vibrates back and forth. This movement of the moving pin 50 causes the drive link 112 to reciprocate relative to each other in the forward and backward directions. As the moving links 112 move back and forth relative to each other, the blade moves in the middle of the head 95 within the guide bar 62. It rotates back and forth as the core. This rotation of the blade teeth 148 causes the teeth to move, This will result in severing ties with the organization that is being pressured.

[0037] During the forward movement of cartridge 60, the cartridge is subjected to resistance. Inner plate 7 6 provides structural strength to the guide bar 62. This structural strength is subjected to these resisting forces. This will suppress the degree to which the bar 62 bends when it is subjected to force. Further reinforcement of the guide bar 62 The area of ​​the outer small parts 80, 99 extends forward of the head 95 of the inner small part 86. Tabs 82 and lobes 84 are constructed on the guide bar in the distal portion of the guide bar. It provides strength. This distal portion is the part of the guide bar that is first exposed to resistance. The existence of tabs 82 and 84 indicates that the distal portion of the guide bar is skiving or Further reduces the possibility of diving. This part of guide bar 62 By preventing skiving or diving, the entire skiving or diving of cartridge 60 This will reduce the possibility of diving.

[0038] A further feature of the present invention is that both sides of the drive link 112 are enclosed within the inner plate 76. This is because if the cartridge is activated, the surgeon will be able to move both sides of the guide bar. Even when holding or touching the side, the surgeon's fingers must not come into contact with the reciprocating drive link 112. This means that, at the very least, the surgeon's fingertips when the drive link moves It becomes essentially impossible to tear the bag. Yet another advantage of this configuration of the present invention is that This facilitates efficient welding of the side portions of parts 64, 76, and 102. Guide bar 62 This side weld of plates 64, 76, 102 for forming side welds along both sides is This will help strengthen the guide bar.

[0039] Figure 4 shows an alternative inner plate 160 which forms part of the guide bar of the cartridge of the present invention. This is a plan view. The inner plate 160 has the base 78 of the aforementioned inner plate 76. The outer small parts 162 and 170 extend forward from the base 78. Sections 162 and 170 are spaced apart from the inner sub-section 165 in the lateral direction. The outer sub-section 16 The proximal portion of 2,170 has the same shape as the proximal portions of sub-parts 80 and 99. The distal portion of parts 162 and 170 is a single part that protrudes inward toward the long axis of plate 160. It is formed to have only material. This single projection is lobe 164. Small part Along minutes 162 or 170, from proximal to distal, the lobe is in the medial small portion 165 From a position somewhat proximal to the distal end of the integrated head 95 (towards the long axis of the plate) It extends outward from the portion. The lobe 164 is such that the portion where the lobe has its maximum thickness is It is curved so that it is in the forward position of D95. From the position of maximum thickness, the lobe is small It curves inward toward the outer surface of lobes 162 or 170. The distal end of each lobe 164 is This is the distal end of the small portion 162 or 170 into which the lobes are integrated.

[0040] The inner plate 160 is formed to have an inner small portion 165. 165 has a similar shape to the aforementioned inner sub-part 86. The difference between the two sub-parts is, The point where the medial small portion 165 has a taper is on the proximal side of the neck 95. The width of the small section 165 increases from section 95 towards the proximal end.

[0041] The inner plate 160 is part of a cartridge equipped with a blade having a relatively wide web. It is suitable as an inner plate for a guide bar that forms part of the cartridge. It is difficult to provide tab 82 on cartridge 60. This is because the existence of the tab is difficult. This is because it interferes with the forward and backward vibration of the guide bar. In the case of a cartridge equipped with a lobe 164, the guide bar In a location adjacent to the distal portion, the lobe reduces skiving or diving. This will provide the guide bar with the structural strength necessary for its construction.

[0042] Figure 5 shows alternative components of the cartridge of the present invention. This is the inner plate 180. The inner plate 180 is the base of the inner plate 76 mentioned above. It has a section 78 and an inner small section 86. The inner plate 180 is mirror symmetric to each other It has small parts 182 and 197 facing each other. Each small part 182 has a single lobe 184 The inner plate 180 is formed to have each lobe 184 small portion head At the distal anterior position of part 95, extending inward from the relevant sub-part 182 or 197 Each lobe 184 is formed in such a way that it is essentially straight from the small portion 182 or 197. It extends along the corner. The small portion 182 extends perpendicular to the long axis of the inner plate 180. Anteriorly, the lobes begin to incline with an outward taper from the long axis. Distal to each lobe 184 The end is essentially the distal end of a small portion 182 or 197 that is integrated with the lobe. Plate 18 The lateral thickness of the lobe on the proximal side of the distal end of 0 is 182,1 in the small portion on the proximal side of the lobe. It is larger than the lateral thickness of 97.

[0043] The inner plate has numerous through holes (without part numbers), i.e., located at the base. It has through holes, through holes located in the inner small portion 86, and through holes located in the lobe 184. These holes are provided for manufacturing reasons.

[0044] The drive link 196 is connected to the inner small portion 88 and the outer small portion 18 which is spaced apart from each other in the lateral direction. Each drive link is located within the elongated holes between 2,197 and 11. It has two main bodies and legs 114. Each drive link 196 has a head 198 at its distal end. Each head 198 has teeth 199 (one set of teeth It is formed to have (part numbered). The teeth 199 of the drive link are the link Numbers 196 are spaced apart from each other along the long axis in the proximal-distal direction of the integrated cartridge.

[0045] Blade 202 is positioned between the small lobes 184. Blade 202 is upper It has a web 210. Two legs 206 are integrated with the web 210 (each leg is numbered). (It is located) but extends proximal to the web. Leg 206 has a small head 95 between the legs They are spaced apart from each other so that they can be seated. Blade 202 has teeth 204 (2 The teeth (which are numbered) are formed to extend outward from the leg 206. 204 is sized to engage with the adjacent drive link 196 and the integrated tooth 199. The blade 202 is curved and located between the legs 206 at the distal end of the web 210. It is further formed to have a proximal surface 208. The surface 208 is of the blade 136 This is the same as surface 144.

[0046] The blade web 210 extends to the distal end of the guide bar. The head 212 is located at the end of the guide bar. It is integrated with the distal end of part 210 and is located in front of it. Head 212 is functional It is essentially the same as blade head 146. The teeth 148 extend forward of head 212. ru.

[0047] A portion of the lower bottom plate 220 is also shown in Figure 5. The bottom plate 220 is front It has a structure similar to the bottom plate 64 described above. Specifically, it is formed on the bottom plate A long hole 72 is shown.

[0048] When the cartridge having the components shown in Figure 5 is assembled, these components will break The drive tooth 204 is positioned to engage with the tooth 199 which is integrated with the drive link 196. The cartridge is used in the same way as the aforementioned cartridge 60. When the treadmill is used, the reciprocating motion of the drive link 196 is controlled by the engagement of the teeth 199. This is transmitted to the brake. As a result of this engagement, the longitudinal forward and backward motion of the drive link is transmitted to the brake. The D202 will rotate back and forth around the small head 95 as its center.

[0049] The components of the cartridge in Figure 5 are such that the outer small parts 182 and 197 are adjacent to the drive link 196. It is understood that it is configured to restrain the outward lateral movement of the contacting head 198. More specifically, the outer surface of the drive link head 198 is adjacent to the drive link 19 It will be pressed against the side of 6. This constraint on the movement of the drive link head 198 And when the link moves back and forth to rotate the blade, the rotation of the blade leg 206 is driven Even if the movable link head 198 is pressed away from the adjacent tooth 204, no problem occurs. This would result in the following: If this motion were to occur without constraint, the teeth 199 of the drive link would be the blade teeth. This will mean we will be leaving the 204.

[0050] The above description is directed to specific embodiments of the present invention. Alternative embodiments of the present invention are described below. It may have characteristics different from those that have been identified.

[0051] For example, various features of different embodiments of the present invention may be combined.

[0052] Similarly, not all aspects of the present invention have all of the features described. In all embodiments of the present invention, the outer portion does not need to extend in front of the inner portion. In an embodiment of the present invention, the outer portion has a distal area located anterior to the inner portion. The lateral portion does not necessarily need to have lobes that extend inward.

[0053] In all aspects of the present invention, it is not necessary to include the rib 150. In some aspects of the present invention, The ribs may be integrated with the upper plate by punching, die forming, or other methods. good.

[0054] Similarly, in some embodiments of the present invention, all or part of the inner plate 76 is a bottom plate It may be formed together with either or both of the plate 64 or the upper plate 102. Therefore, In these embodiments of the present invention, once the blank is formed, the blank is driven It is machined to define the elongated hole in which the head sits, and to define the periphery of the small portion. It is designed to do so. Alternatively, the part that defines the opening or elongated hole of the guide bar is molded. It may be formed by.

[0055] In some aspects of the present invention, a single drive link is required to rotate the blade head. It may be all necessary. In some aspects of the present invention, one or more drive links are It does not have to be parallel to the long axis of the cartridge. Therefore, in these embodiments of the present invention, one or The opening of the guide bar where multiple drive link elements are seated is similar to the long axis of the cartridge. It does not have to be located on a line parallel to it.

[0056] In an embodiment of the present invention, at least one drive link and blade have complementary teeth, The guide bar may have a structure different from the one described. Specifically, the guide The bar is formed so that the blade head does not become a single, integrated part of the plate that forms the bar. It may be done. In these embodiments of the present invention, the center when the blade rotates The structure is attached to at least one of the plates forming the bar, or by an integrated pin. That's fine.

[0057] In some aspects of the present invention, two or their plates forming a guide bar All three of the three pieces of the t are fixed together by welding or by other means. It does not have to be a plate. In these alternative embodiments of the present invention, the multiple plates are a single unit It may be machine-processed as knitted material, or it may be molded together with the knitted material.

[0058] The various shapes of the elements may be changed from the shapes described.

[0059] Therefore, the purpose of the attached claims is to encompass such modifications that capture the true spirit and scope of the invention. This includes all and corrective actions.

Claims

1. A guide bar (62) including a proximal end and a distal end, Blades (136, 202) connected to the guide bar (62), Equipped with, The aforementioned guide bar (62) is Two outer plates (64, 102), each being a single component and shaped to have substantially the same outer circumference as the other, It comprises inner plates (76, 160, 180) located between the two outer plates (64, 102), The aforementioned inner plates (76, 160, 180) are The base (78) that forms the proximal end of the inner plate (76, 160, 180), A pair of outer sub-parts (80, 99, 162, 170, 182, 197) are spaced apart from each other and extend distally from the base (78), A head (95) having a curved distal surface, positioned between the two outer plates (64, 102) near the distal end of the guide bar (62), Includes, The outer surface of each of the pair of outer sub-parts (80, 99, 162, 170, 182, 197) forms a part of the outer surface of the guide bar (62), and this part connects each of the two outer plates (64, 102). The blades (136, 202) are formed to have teeth (148) located distal to the guide bar (62), The blades (136, 202) are configured to revolve around the head (95). Surgical saw blade cartridge (60).

2. The surgical saw blade cartridge (60) according to claim 1, wherein the pair of outer sub-parts (80, 99, 162, 170, 182, 197) are mirror-symmetric to one another.

3. The surgical saw blade cartridge (60) according to claim 1, wherein at least a portion of the blade (136, 202) is located between the pair of outer sub-parts (80, 99, 162, 170, 182, 197).

4. The surgical saw blade cartridge (60) according to claim 1, wherein the guide bar (62) includes a side weld formed along the portion of the outer surface of the guide bar (62), the side weld connecting each of the pair of outer sub-parts (80, 99, 162, 170, 182, 197) to each of the two outer plates (64, 102).

5. A surgical saw blade cartridge (60) according to any one of claims 1 to 4, further comprising an inner small portion (86, 165) extending distally from the base (78), wherein the inner small portion (86, 165) is positioned between the two outer plates (64, 102), and the head (95) is formed at the distal end of the inner small portion (86, 165).

6. The surgical saw blade cartridge (60) according to claim 5, wherein the inner small portion (86, 165) has an opening that is aligned in line with one of the two outer plates (64, 102).

7. The surgical saw blade cartridge (60) according to claim 5 or 6, wherein each of the inner sub-parts (86, 165) and the pair of outer sub-parts (80, 99, 162, 170, 182, 197) is integrally formed with the base (78) and extends from the base (78).

8. The device further comprises at least one drive link (112, 196) movably positioned within the space between the pair of outer sub-parts (80, 99, 162, 170, 182, 197) and between the two outer plates (64, 102), The proximal end of at least one of the drive links (112, 196) is configured to be attached to the drive element of the saw, The distal end of the at least one drive link (112, 196) is connected to the blade (136, 202) such that the blade (136, 202) can pivot around the head (95) of the inner plate (76, 160, 180) by the reciprocating motion of the at least one drive link (112, 196), the surgical saw blade cartridge (60) according to any one of claims 1 to 7.

9. The surgical saw blade cartridge (60) according to any one of claims 1 to 8, wherein the blade (136, 202) comprises a web (142, 210) and a blade head (146, 212), the web (142, 210) being positioned between the two outer plates (64, 102).

10. The surgical saw blade cartridge (60) according to any one of claims 1 to 8, wherein each of the two outer plates (64, 102) defines two openings (67, 104) in front of the proximal end of the guide bar (62).

11. A surgical saw blade cartridge (60) that vibrates the blades (136, 202), A guide bar (62) including a proximal end and a distal end, Blades (136, 202) connected to the guide bar (62), Equipped with, The guide bar (62) comprises two outer plates (64, 102) and an inner plate (76, 160, 180) located between the two outer plates (64, 102). The aforementioned inner plates (76, 160, 180) are The base (78) that forms the proximal end of the inner plate (76, 160, 180), Two outer sub-parts (80, 99, 162, 170, 182, 197) extending distally from the base (78) at the proximal end of the guide bar (62), wherein each of the two outer sub-parts (80, 99, 162, 170, 182, 197) is positioned between the two outer plates (64, 102), and the two outer sub-parts (80, 99, 162, 170, 182, 197) are spaced apart from each other, and the two outer sub-parts (80, 99, 162, 170, 182, 197) An inner small portion (86, 165) is positioned between the two outer small portions (80, 99, 162, 170, 182, 197) and extends distally from the base (78) at the proximal end of the guide bar (62), Equipped with, The inner small portion (86, 165) is formed such that a head (95) is defined at the distal end of the inner small portion (86, 165), The inner small portion (86, 165) has an opening that is aligned straight with one of the openings (69, 106) of the two outer plates (64, 102). The blades (136, 202) are formed to have teeth (148) located distal to the guide bar (62), The blades (136, 202) are configured to contact the head (95) of the inner small portion (86, 165) and to pivot around the head (95). Surgical saw blade cartridge (60).

12. The surgical saw blade cartridge (60) according to claim 11, wherein the two outer sub-parts (80, 99, 162, 170, 182, 197) are mirror-symmetric to one another.

13. The surgical saw blade cartridge (60) according to claim 11, wherein at least a portion of the blade (136, 202) is located between the two outer sub-parts (80, 99, 162, 170, 182, 197).

14. The surgical saw blade cartridge (60) according to any one of claims 11 to 13, wherein the blade (136, 202) comprises a web (142, 210) and a blade head (146, 212), the web (142, 210) being positioned between the two outer plates (64, 102).

15. The surgical saw blade cartridge (60) according to any one of claims 11 to 14, wherein each of the inner sub-parts (86, 165) and the two outer sub-parts (80, 99, 162, 170, 182, 197) is integrally formed with the base (78) and extends from the base (78).

16. The device further comprises at least one drive link (112, 196) movably positioned within the space between the two outer sub-parts (80, 99, 162, 170, 182, 197) and between the two outer plates (64, 102), The proximal end of at least one of the drive links (112, 196) is configured to be attached to the drive element of the saw, The distal end of the at least one drive link (112, 196) is connected to the blade (136, 202) so that the blade (136, 202) can pivot around the head (95) of the inner small portion (86, 165) by the reciprocating motion of the at least one drive link (112, 196), the surgical saw blade cartridge (60) according to any one of claims 11 to 15.

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