Surgical instrument of double-branch design with improved cleaning suitability
阅读说明：本技术 具有改进的清洁适宜性的双分支设计的外科器械 (Surgical instrument of double-branch design with improved cleaning suitability ) 是由 皮埃尔·伊特韦恩 罗伯特·福格特赫尔 于 2018-04-27 设计创作，主要内容包括：本发明涉及一种剪刀型或钳型医疗技术器械(1),所述医疗技术器械(1)具有第一器械分支(2)、第二器械分支(3)和轴承元件(6),所述轴承元件(6)以接触螺纹接头联接所述器械分支(2,3),其中所述两个器械分支(2,3)能够相对于彼此枢转并且在操作枢转区域中通过互相面对的接触表面(13,14,15)在接头部分(4,5)中相互接触,使得处于所述操作枢转区域中的所述器械分支(2,3)通过其相应的接触表面(13,14,15)以支承和引导的方式相互接触,并且所述器械分支(2,3)能够定位在所述操作枢转区域之外的清洁位置中,其中所述轴承元件(6)优选地是无螺纹的,并且在一个端部部分处直接牢固地固定在所述第一器械分支(2)上,而在另一个端部部分处具有随着相对于所述第一器械分支(2)的距离的增大而以连续或阶梯的方式锥形地加宽的头部(8),所述头部(8)穿入所述第二器械分支(3)中的连续地或阶梯地成锥形的通道口(10),其中所述通道口(10)以细长孔洞(10)的形式设计,其中所述轴承元件(6)可旋转定位地并平移固定地接纳在所述细长孔洞(10)中,尤其是位置固定地接纳在所述细长孔洞(10)的纵向方向(L)上。(The invention relates to a scissor-or clamp-type medical instrument (1), which medical instrument (1) has a -th instrument branch (2), a second instrument branch (3) and a bearing element (6), which bearing element (6) couples the instrument branches (2, 3) with a contact screw joint, wherein the two instrument branches (2, 3) can be pivoted relative to one another and in the operating pivot region are in contact with one another in a joint section (4, 5) by means of mutually facing contact surfaces (13, 14, 15), so that the instrument branches (2, 3) in the operating pivot region are in supporting and guiding contact with one another by means of their respective contact surfaces (13, 14, 15), and the instrument branches (2, 3) can be positioned in a cleaning position outside the operating pivot region, wherein the bearing element (6) is preferably unthreaded, and is directly fixed on the -th instrument branch (2) at the end portions of a bore , while at the other end portions there is a tapered or tapered bore (10) which is fixedly secured in the longitudinal direction of the elongated passage (10) of the elongated instrument branch (10), wherein the elongated bearing element (10) is fixedly positioned in the longitudinal direction of the elongated passage (10) of the elongated bearing branch (10) in a longitudinal direction of the elongated passage (10).)
scissor-or forceps-type medical instrument (1), the medical instrument (1) having a -th instrument branch (2), a second instrument branch (3) and a bearing element (6), the bearing element (6) coupling the instrument branches (2, 3) in an overlapping closure,
wherein the two instrument limbs (2, 3) are pivotable relative to one another and are in contact with one another in the joint sections (4, 5) in the operating pivot region by means of contact surfaces (13, 14, 15) facing one another,
in such a way that the instrument branches (2, 3) in the operating pivot region are in contact with one another in a bearing and guiding manner by means of their respective contact surfaces (13, 14, 15),
and the instrument branches (2, 3) can be positioned in a cleaning position outside the operating pivot region,
wherein the bearing element (6) is preferably thread-free and is fixed directly and firmly on the th instrument branch (2) at end portions, and has a head (8) which widens conically in a continuous or stepped manner with increasing distance from the th instrument branch (2) at the other end portions, the head (8) penetrating into a continuously or stepped tapering passage opening (10) in the second instrument branch (3), wherein the passage opening (10) is designed in the form of an elongated bore (10),
the method is characterized in that: the bearing element (6) is received in the elongated hole (10) in a rotationally positionable and translationally fixed manner, in particular in a positionally fixed manner in the longitudinal direction (L) of the elongated hole (10).
2. Device (1) according to claim 1, characterized in that the elongated hole (10) has a circular flange or notch (12), preferably on its longitudinal side or in an opposite manner on both longitudinal sides of the elongated hole, preferably in that the elongated hole (10) in its longitudinal central section is further , with which the bearing element (6) is brought into engagement so that displacement along the elongated hole (10) is prevented.
3. Device (1) according to claim 1 or 2, characterized in that the longitudinal axis of the elongated hole (10) extends in the longitudinal direction (L) of the second device branch (3), and in particular that the elongated hole (10) protrudes beyond the -th device branch (2) on both sides in the width direction when the device branches (2, 3) are in the cleaning position, wherein the device branches (2, 3) are substantially at right angles to each other.
4. Device (1) according to claim 1, 2 or 3, characterized in that the length of the elongated hole (10) in the longitudinal direction (L) is larger than the width (B) of the th device branch (2) and/or the length of the elongated hole (10) in the longitudinal direction (L) is larger than the length of the respective contact surface (13, 14, 15) in the longitudinal direction (L).
5. -Instrument (1) according to the preceding claim, characterized in that, when pivoting the instrument branches (2, 3), the elongated hole (10) sweeps at least 90%, preferably 95% and more preferably 100% of the contact surface (15) of the -th instrument branch (2).
6., the instrument (1) of the preceding claim, characterized in that the operating pivot region extends from a flare angle α starting at 0 ° between the instrument branches (2, 3) to a flare angle of between about 50 ° and 40 °, preferably of about 45 °, and/or in that there is a flare angle α of between about 50 ° and about 95 °, preferably of between 60 ° and 90 °, particularly preferably of about 90 °, between the instrument branches (2, 3) in the cleaning position.
7. instrument (1) according to the preceding claim, characterized in that the bearing element (6) is designed as a bearing pin (6), the bearing pin (6) having a substantially cylindrical pin portion (7) and an adjacent head (8), wherein preferably the pin portion (7) is pressed into an opening (9), in particular a passage opening (9), of the instrument branch (2).
8. Device (1) according to claim 6, characterized in that the pin portion (7) is connected to the th device branch (2) in a force-locking manner, in particular pressed, riveted, plastically deformed or clamped, or is connected physically, in particular glued, soldered or welded, or in particular the pin portion (7) is connected to the th device branch (2) by a threaded connection, which is preferably tightened in a torque-controlled manner.
9. apparatus (1) according to any one of the preceding claims 2 to 8, characterized in that the flange or notch (12) forms together a bore-shaped receiving portion (12), the width of the receiving portion (12) is widened with respect to the width A of the elongated hole (10), and the other end portions of the bearing element (6) are rotatably locatably received in the receiving portion (12) and have a diameter greater than the width A of the elongated hole (10).
10. The apparatus (1) according to claim 9, characterized in that: the receiving portion (12) of the elongated hole (10) is continuously tapered or stepwise tapered.
11. Device (1) according to of the preceding claim, characterized in that the passage opening (10) of the second device branch (3) has a substantially cylindrical opening portion (21) on the side facing the joint portion (5), the opening portion (21) having a clearance (22) with respect to the bearing element (6).
12. instrument (1) according to the preceding claim, characterized in that the joint portion (5) of at least (3) of the instrument branches has a transverse slot (16) and on both sides of the transverse slot (16) there are corresponding contact surfaces (13, 14) for the joint portions (4) of the other instrument branches (2), wherein a gap (17) or clearance (17) can be present between the instrument branches (2, 3) without mutual contact through the contact surfaces (13, 14, 15) in a cleaning position outside the operating pivot region.
13. Device (1) according to claim 12, characterized in that the transverse slot (16) has a width (B) in the longitudinal direction (L) of the respective device limb (3) which is at least equal to the width (B) of the other device limbs (2) in their joint portions (4) transversely to their longitudinal direction (L), wherein the width (B) of the transverse slot (16) is preferably slightly larger or larger than the width (B) of the limb (3) and/or the transverse slot (16) has a depth (T) of between about 1.0mm and about 0.1mm, preferably between about 0.7mm and about 0.3mm, particularly preferably about 0.5 mm.
Technical Field
The invention relates to scissor-or pincer-type medical-technical instruments with a -th instrument branch (instrument portion), the -th instrument branch consisting of a distal engaging/operating portion, a proximal handle/holding portion and an interposing coupling/closing portion, a second instrument branch (instrument portion) also consisting of a distal engaging/operating portion, a proximal handle/holding portion and an interposing coupling/closing portion, and a bearing element which overlappingly closes the coupling instrument branches (instrument portions), whereby the two instrument branches (instrument portions) can be pivoted relative to one another in a scissor-like manner and (slidingly) contact one another in the respective coupling/closing portions by means of mutually facing contact surfaces in an operating pivot region, so that the two instrument branches in the operating pivot region are in supporting and guiding manner (i.e. slidingly) by means of their respective contact surface steps in contact with one another, and the instrument branches can be positioned in a cleaning position outside the operating pivot region, wherein the bearing element is preferably unthreaded and is fixedly secured at -end portions at which the head of the second instrument branch is designed to increase in a continuous or tapered manner with respect to the head of the second instrument branch, wherein the head of the instrument branch in a continuous design of the elongated head portion, or the instrument, with the elongated head of the instrument, with the elongated contact element, with the elongated contact surface, the elongated contact of the elongated contact element, with the elongated contact surface, with the contact, with the elongated contact, with the.
Background
Both versions have the disadvantage, inter alia, that in the articulation region between the pivotally coupled instrument branches there is a covered gap surface which, due to the coupling of the instrument, is not exposed or accessible in any (angular) position of the branches, both covered gap surfaces do not allow for an optimal cleaning and sterilization of the instrument, in general the branches of the instrument are brought into an open position of about 90 ° for cleaning, so that the covered surfaces can be reduced slightly.
For example, EP 2594210A 1 shows a scissor-type or forceps-type medical instrument having a -th branch and a second branch (instrument part) which are pivotably connected by a bearing pivot having a radially widened head part on the side and a threaded head on the other side, the -th branch forming a guide plate and the second branch forming a support plate into which the bearing pivot is screwed, the guide plate having an aperture for pivotably accommodating the bearing pivot, the guide plate and the support plate being in planar contact with one another in the normal operating state of the instrument.
The support plate has on its contact surface facing the guide plate a transverse groove (notch) which is arranged in the region of the bearing pivot and extends transversely to the support plate, the depth (T3) of which transverse groove corresponds at least to the depth (T1) of the -th notch of the elongated hole and the width (B) of which transverse groove corresponds at least to the width (B) of the guide plate, through which guide plate the -th branch can be brought into a pivoted position aligned with the transverse groove, and an adjustment of degrees can be made in the transverse groove in the direction towards the bearing pivot, so that the head portion of the bearing pivot is disengaged from the -th notch of the elongated hole, the head portion of the bearing pivot will be brought into a state of overlapping with the elongated second notch by adjusting said second branch along the elongated hole through the support plate of the second branch and the bearing pivot, and will be brought into a state of engagement with the second notch by adjustment in the direction of the bearing pivot.
In addition, due to the reduced countersink depth of the threaded head for the bearing pivot, the guidance/stability of the rotation of the closure is limited, which can only be compensated by a higher final thickness which can entail corresponding disadvantages in the application, in particular a sense of heaviness of the relative pivoting of the two branches.
EP 2873381 a1 discloses a medical instrument which consists of a hand lever (instrument part) comprising a guide plate and a second hand lever (instrument part) comprising a support plate, which hand lever and second hand lever are pivotably connected/coupled by means of a bearing pivot which is arranged in the region of the guide plate and the support plate and is provided with a radially widened head part the support plate forms in its longitudinal edge region a corresponding receiving groove into which the guide plate engages in its operating position the support plate has a recess between the receiving grooves which extends over the entire width of the support plate.
A disadvantage of this instrument is that a visual check of the success of the cleaning of the closed gap in the cleaning position is only possible to a small extent. Furthermore, the edge regions of the support plate form transitions or steps that can interfere with preparation work (e.g., knot of suture material, capture of tissue).
A similar instrument of is known from EP 2412324A 2, in which a pivot pin projects through the second support plate and is provided in its end region with a radially widened annular flange projecting through the second support plate, this flange having a distance (a) relative to the support plate which corresponds to twice the thickness (d) of the second support plate resting on the pivot pin or is greater than twice the thickness (d) of the second support plate, so that the second hand lever (instrument part) can be displaced along the pivot pin towards the th hand lever (instrument part) in the open pivot position to a position, in which the opposite contact surfaces of the planar support plate are exposed.
DE 29712016U 1 discloses detachable multi-purpose scissors in which the instrument parts are detachably coupled. From DE 202004002560U 1, detachable dental forceps are known. For these instruments, the detachability of the instrument results in additional expense. Furthermore, when reassembling after cleaning, it is necessary to ensure correct pairing of the instrument halves. There is also an adverse risk of confusion with different instrument sizes.
Finally, a surgical instrument is known from DE 20100589U 1, which has two limbs which are pivotably connected to one another and have planar abutment surfaces which are adjacent to one another in their pivot connection region when the limbs are pivoted in their working region.A means is provided for eliminating planar contact of the abutment surfaces in certain sections in the event of a relative displacement of the two limbs out of their working region.
In addition, there are known instruments where the blocking thread is screwed into instrument branches until contact with a stop (collar) and is tightened slightly too tightly to cause cold welding of the thread, the blocking thread penetrates a stepped bore in another instrument branches and has a threaded head that contacts another instrument branches and pushes/tensions the other instrument branches in the direction of instrument branches.
Disclosure of Invention
It is therefore the object of the present invention to create surgical instruments which at least partially eliminate the disadvantages described above, in particular to develop also visually discernible instrument closures with good suitability for cleaning, in addition to easy cleanability, preferably also a good visual check on the success of the cleaning should be possible.
This object and preferred objects are solved or achieved according to the invention by means of (scissor or clamp) instruments according to claim 1, in particular by scissor or clamp medical technical instruments having a instrument branch (instrument portion) consisting of a distal engaging/operating portion, a proximal handle/holding portion and an interposed coupling/closing portion, a second instrument branch (instrument portion) also consisting of a distal engaging/operating portion, a proximal handle/holding portion and an interposed coupling/closing portion, and a bearing element which couples the instrument branches (instrument portions) in overlapping closure, whereby the two instrument branches (instrument portions) can pivot relative to each other in a scissor-like manner and in the operating pivot region are in (sliding) contact with each other in the respective coupling/closing portion by mutually facing contact surfaces, so that the two instrument branches in the operating bore pivot region are in bearing and guiding manner (i.e. in sliding) contact with each other by their respective contact surfaces and in the operating pivot region are in (sliding) contact with each other in a stepped manner with the elongated contact surface of the operating pivot region being fixedly positionable outside the second instrument branch in a longitudinal direction of the elongated pivot region, wherein the elongated head of the elongated pivot element is fixedly positioned in a longitudinal direction of the elongated pivot region of the elongated pivot shaft, wherein the elongated pivot element is fixedly secured in a longitudinal direction of the elongated contact surface of the elongated pivot region of the elongated pivot element, wherein the elongated contact element is fixedly secured, wherein the elongated head, the elongated contact surface of the elongated contact element is fixedly secured, in a longitudinal axis, wherein the elongated contact surface of the elongated contact element is fixedly secured, or the elongated contact of the elongated contact element, in the elongated contact surface of the elongated contact element, in the elongated contact surface of the.
The bearing pivot is preferably unthreaded and is fixed to the branches in an -body or friction-locked manner, for example by riveting, welding, pressing and/or gluing.
The operating pivot region is to be understood in the sense of the present invention as a pivot region (pivot angle region) in which the two instrument limbs pivot relative to one another when used in the intended use, which ensures that throughout the entire predetermined operating pivot region both limbs bear against one another (without play) at their contact surfaces and that the taper/(multi-layer) step-shaped passage openings penetrated by the bearing elements (bearing pivot/bearing bolt/bearing pin) bear against one another (without play), so that sliding bearings are formed, so that the limbs are guided towards one another in the intended manner, i.e. in particular with the desired movement behavior, in particular the (partial) taper shape of the bearing element head and the corresponding taper shape of the passage openings lead to force components in the longitudinal direction of the bearing element, to press the two instrument limbs slidably against , and to lead to force components perpendicular to the longitudinal direction of the bearing element, whereby the bearing play in the radial direction of the bearing element is reduced/eliminated.
The cleaning position is thus not defined as a specific (angular) position of the two limbs relative to one another, but rather a position/position region outside the operating pivot region, wherein or more clearances provided according to a preferred embodiment of the invention are located between the limbs and preferably between the bearing element head and the passage opening penetrated by said bearing element head.
The branches of the instrument are preferably joined at in a so-called "overlapping closure", which means that two instrument branches are preferably arranged on top of each other (not inside each other) so that instrument branches rest on the other instrument branches (the "overlapping", "semi-overlapping" and "embedded" types are also possible). in this preferred arrangement, the two instrument branches are coupled by bearing elements.
When and as long as the two instrument branches are positioned in the operative pivot region relative to each other, they bear (slidably) against each other at their contact surfaces. Furthermore, the head of the bearing element (substantially) contacts the inner wall of the passage opening without play.
In the operating pivot region and in the cleaning position, according to the invention, the bearing element can be rotated or positioned to rotate in the passage opening, i.e. in the elongated hole, but the bearing element cannot be displaced in translation, i.e. the bearing element cannot be positioned in the elongated hole in a relative translation in the direction of the longitudinal axis of the elongated hole.
The bearing element is designed and adapted in ways for the two instrument branches so that they are in sliding contact with one another and are supported in the desired manner and with the desired movement behavior (rotational resistance) in the operating pivot region, according to the invention, the bearing element (bearing pin) is fixed to the th instrument branch, the position (axial position relative to the longitudinal axis of the bearing element aligned with the pivot axis) and the inclination of the conical surface of the conical head of the bearing element are adapted to the position and inclination of the inner conical surface of the conical passage opening of the second instrument branch.
The above-mentioned disadvantages of the prior art can be avoided particularly well by the preferably thread-free fastening, in particular the joining and coupling of the two instrument branches at can be carried out automatically and force-controlled and/or, in the case of a thread, torque-controlled (torque-controlled threaded connection), so that the invention provides the advantage that manual joining of such instruments is no longer necessary.
According to the invention, it is provided that the passage opening in the second instrument branch is formed as an elongated hole, the longitudinal axis of which extends in the longitudinal direction of the second instrument branch, which passage opening in the cleaning position allows in an advantageous manner to minimize the overlapping area of the two instrument branches and thus to further increase the cleanability .
Advantageous embodiments of the invention are also claimed in the dependent claims and are explained in more detail below.
Embodiments of the present invention may provide that the longitudinal axis of the elongated hole extends in the longitudinal direction (L) of the second instrument branch, and in particular that the elongated hole extends widthwise beyond both sides of the th instrument branch when the instrument branch is in the cleaning position.
The length of the elongated hole in the longitudinal direction (L) may be in particular greater than the width (B) of the th instrument branch alternatively or additionally, the length of the elongated hole in the longitudinal direction (L) may be greater than the length of the corresponding contact surface in the longitudinal direction (L).
The embodiments are characterized in that the elongated hole (10) sweeps at least 90%, preferably 95% and more preferably 100% of the contact surface (15) of the th instrument branch (2) when the instrument branches (2, 3) are pivoted.
With the operating pivot region formed in this way, it is possible to prevent the instrument from being accidentally transferred from the operating pivot region into the cleaning position during use of the instrument, according to embodiments, the operating pivot region can be expanded from an opening angle of 0 ° between the instrument limbs to an opening angle of between approximately 50 ° and 40 °, preferably an opening angle of approximately 45 °.
This is particularly advantageous in the case of cleaning positions in which there is an opening angle of between about 50 ° and about 95 °, preferably between 60 ° and 90 °, particularly preferably about 90 °, between the instrument limbs. This simplifies the transfer of the instrument from the operating pivot area to the cleaning position.
According to embodiments, the bearing element can be formed as a bearing pin or bearing rivet having a (substantially) cylindrical pin portion on the side and an adjacent widened conical head on the other side.
The embodiments of the invention are characterized in that the elongated hole has a receiving portion with a width that is expanded relative to the width A of the elongated hole, and the other end portion of the bearing element is rotatably positioned received in the receiving portion and has a diameter that is larger than the width A of the elongated hole.
The passage opening of the second instrument branch on the side facing the closure portion (on the side facing the th instrument branch) may in particular have an essentially cylindrical opening portion with clearance with respect to the bearing element in this way the second instrument branch can easily be prevented from being blocked by the conical surface of the bearing element head in addition it should also be ensured that the cylindrical pin portion can also be rinsed/cleaned within the passage opening. special embodiments of the invention are characterized by a cone angle (acute angle) of between about 35 ° and about 55 °, preferably between about 40 ° and 50 °, particularly preferably about 45 °.
Another embodiments are cylindrical counterbores with tapered outlets (see threaded head of FIG. 8). however, the connecting elements are not supported by collars on the opposite instrument limbs.
Another embodiment is characterized in that the closing parts of at least of the instrument branches have a transverse slot and on both sides of the transverse slot have corresponding contact surfaces for the closing parts of the other instrument branches, then, in a cleaning position outside the operating pivot region, without mutual contact, a gap or clearance can be present between the instrument branches via the contact surfaces.A transverse slot (on the side, on the alternative side, or on both sides) (known per se from the prior art) is inserted -way into the coupling/closing part, so that it is concave relative to the opposing contact surfaces formed (on both sides) on the corresponding branches (instrument parts) and the other branches (instrument parts) can adapt at least partially to the transverse slot in the cleaning (angular) position.the contact surfaces of the two branch instruments are therefore designed in -way, so that they bear against one another substantially without clearance throughout the entire operating pivot region (operating pivot angle region) and in particular support one another with the desired movement behavior (rotational resistance).
The transverse slot is thus at least corresponding to the width of the other opposing instrument branches in this region, i.e. in the closing parts thereof, and the slot depth of the transverse slot at least partially corresponds to the thickness of the opposing branches.
When and as long as the two instrument branches are positioned in the operating pivot region relative to one another, a gap exists between the cross slot bottom and the opposite instrument branch, the height of which gap (in the case of a cross slot integrated in only instrument branches) corresponds to the cross slot depth.
embodiments of the invention can provide that the slot has a width (B) in the longitudinal direction of the respective instrument branch which is at least equal to the width (B) of the other instrument branches in their closure parts transversely to their longitudinal direction, wherein the width (B) of the slot is preferably slightly larger or larger than the width (B) of the branch.
This is particularly advantageous in case the grooves have a depth of between about 1.0mm and about 0.1mm, preferably between about 0.7mm and about 0.3mm, particularly preferably about 0.5 mm. Such slots are sized to allow sufficient clearance between the instrument limbs in the cleaning position for cleaning in the intended manner.
In addition, this ensures that the surfaces of the two instrument limbs are actually spaced apart in the cleaning position, and in particular are not covered by other components of the instrument between their limbs, such as isolation or compression springs, which are intended to ensure that the limbs are spaced apart.
It can also be said that, according to the invention, by incorporating the bearing element into the elongated bore, such that said bearing element cannot move without the need for clearance between the instrument branches, a particularly good way of cleaning the closure part is possible, furthermore, a groove/cross-groove (recess) can be used to create a clearance in the closure part at a depth of at least 0.1mm (depending on previous experience, a possibly smaller depth is also sufficient, depending on the clearance surface covered) on or two in the inner end surface, the groove/cross-groove results in two positioning of the instrument halves relative to each other up to an opening angle of about 45 ° (working area), the instrument halves are guided in the outer area, have no clearance, and can create resistance to movement (if required), above an opening angle of about 45 ° (cleaning position), the groove/cross-groove is located below the opposing instrument halves, resulting in a clearance in the closure bore hole, this allows for rinsing, cleaning and sterilizing the closure part of the closure part and guide surface well, this invention enables a good cleaning of the tapered connection head to be inspected, which makes it possible to be used for a less expensive visual inspection of the tapered connection between the closure part, a tapered connection of the tapered head, a tapered connection of a closure part, which is easy to clean, and which cleaning of the tapered connection is possible to be inspected, which is possible to be made possible.
The following advantages can be achieved in particular by the invention:
1) better cleanability/rinsability of the area between the two instrument branches and a greater possibility of visual inspection of the cleaning success.
2) Simple and process-reliable adjustment of the 'movement' (rotational resistance) of an instrument limb by defined tensioning of the limb
3) According to the invention, the bearing element can be fixed to instrument halves by means of a fastening technique of riveting, welding, pressing, gluing, plastic deformation, alternatively a threaded connection can be used which is not placed on the collar but is fixed (welding, gluing, plastic deformation, etc.) in the desired position.
Drawings
The invention is explained in more detail below using the figures as examples. These figures show:
fig. 1 shows a top view of the portion of a surgical instrument, in accordance with an th embodiment of the invention, where the slots in the branches are in a partially open state in the operative pivot region,
figure 2 shows a top view of the portion of the surgical instrument of figure 1 in an open state in a cleaning position,
figure 3 shows the representation of figure 1 with the contact surfaces indicated,
figure 4 shows the instrument in the position of figure 2 in a view from below,
figure 5 shows a cross-sectional view of the part of figure 1 in the region of the operating pivot,
figure 6 shows a cross-sectional view of the portion of figure 1 in a cleaning position,
figure 7 shows a perspective view of the instrument without the bearing element in the position of figures 2 and 4,
figure 8 shows a cross-sectional view of a bearing thread screwed into the instrument according to the prior art,
figure 9 shows a representation corresponding to figure 3 of a further embodiment of a surgical instrument according to the invention having no slots in the branches,
fig. 10 shows the instrument according to the embodiment of fig. 9 in a view from below, and
fig. 11 shows a perspective view of the instrument according to fig. 9 and 10 in the position of fig. 10 without the presence of a bearing element.
Detailed Description
The figures are merely schematic in nature and serve only to understand the invention the figures show two embodiments, figures 1 to 7 relate to the th embodiment and figures 1, 2, as 6 and 9 to 11 relate to a second embodiment of an instrument according to the invention, a comparison of figures 3 and 9 and 4 and 10 shows that the th embodiment differs from the second embodiment in that a
The scissor-type or forceps-type medical instrument 1 shown by way of example in the figures has both in the th embodiment and in the second embodiment a th instrument branch (instrument part) 2 and a second instrument branch (instrument part) 3. the
In this arrangement the two
The
The
Due to the coupling achieved by means of the
In the th embodiment, the
In the second embodiment the
In the th embodiment, the two
Outside the operating pivot region, the instrument 1 according to the embodiment can be brought into a cleaning position, in which position there is a
The
Fig. 8 shows a known
In the second embodiment, the two
Furthermore, the width of the
List of reference marks
1 apparatus
2 branch of instruments
3 second branch of instruments
4 th closure part
5 second closure part
6 bearing element, bearing pin
7 pin part
8 conical head
9 channel port
10 channel opening, elongated hole
11 longitudinal axis
12 conical portion, receiving recess
13 th contact surface
14 second contact surface
15 third contact surface
16 horizontal groove
17 gap, clearance
18 outer surface, plain bearing surface
19 inner surface, plain bearing surface
20 gaps, spaces
21 cylindrical part
22 gap
23 riveting head
24 apparatus (prior art)
25 blocking thread
26 screw thread
27 stepped hole
28 screw head
29 abutting surface
30 contact surface
31 tolerance
A width of the
B width of the
b width of the
L longitudinal direction
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