Albaran mechanism, drive body and method for tightening a traction line

Abstract

The invention relates to an Albaran mechanism, a drive body and a method for tightening a traction line. The Albaran mechanism has an Albaran lever at the distal end of a shaft. The Albaran lever can be operated by a toggle lever on the main body of the Albaran mechanism. To this end, the lever is mechanically connected to the toggle lever along the shaft via a traction line. The installation or tightening of the tensioning line becomes complicated and expensive in the known Albaran mechanism. The invention provides an Albaran mechanism (10), a drive body (17) and a method for tightening a traction line (21), by which at least one traction line (21) can be tightened in a particularly simple and reliable manner. This is achieved in that the tightening mechanism for tightening at least one traction line (21) can be connected to the drive body (17) of the Albaran mechanism (10) parallel to the longitudinal axis of the shaft (12).

Description

Technical Field

[0001] The invention relates to an Albarran mechanism, a drive body and a method for tightening a traction line to operate an Albarran lever of an Albarran mechanism. Background Art

[0002] The Albaran mechanism is assisted in surgery or treatment with surgical instruments such as endoscopes, resectoscopes, cystoscopes, etc. For example, the Albaran mechanism can be used to bend flexible forceps in a targeted and controllable manner in the patient's body. For this reason, the Albaran mechanism has a rod-shaped or tubular shaft like an endoscope, which is inserted into the patient's body with a distal end. At the proximal end of the Albaran mechanism outside the patient's body, the shaft is connected to the main body. Through the main body, other instruments or tools such as optical devices, wires, etc. can be guided through the shaft into the patient's body via various openings or ports.

[0003] The Albaran mechanism has a lever at the far end of the shaft, the so-called Albaran lever. The lever is designed to be active and can be operated or turned by a toggle lever on the body. To this end, the lever is mechanically coupled to the toggle lever along the shaft. The mechanical coupling can be a rod or a traction line. Typically, the lever is coupled to the toggle lever by two traction lines. It is conceivable that both traction lines are used to rotate the lever forward and backward, or that different movements of the lever by means of the toggle lever can be achieved by two traction lines.

[0004] For the reliable operation of the Albarn lever, the traction wire must be tightened in the main body and there in the drive body. That is, the traction wire is twisted under mechanical tension during installation. For this reason, the traction wire in the known Albarn mechanism is tightened by a headless screw respectively. In order for the headless screw to tighten the respective traction wires, the traction wire must be deformed by annealing. This step is considered to be particularly troublesome because the wires already laid in the instrument are subjected to a sufficiently large amount of thermal energy in the main body and then tightened with the headless screw. Since it is necessary to tighten from the side, that is, to tighten transversely to the longitudinal axis of the shaft, this installation step must be performed before installing the elbow lever or the elbow lever shaft. The headless screw is screwed into the drive body through the free opening for the elbow lever. In general, the installation is very laborious, complicated and therefore prone to error. If the main body of the Albarn mechanism does not allow this, the traction wire is always approached from the side, then this tightening cannot be performed. Summary of the invention

[0005] The invention is based on the object of providing an Albaran mechanism, a drive body and a method for tensioning a traction line, by means of which the traction line can be tensioned in a particularly simple and reliable manner.

[0006] The solution to this task is described by the features of the first aspect of the present invention. It is therefore provided that a tensioning device for tensioning at least one traction line parallel to the longitudinal axis of the shaft can be connected to the drive body. This parallel tensioning of the traction lines results in no longer requiring a lateral approach to the traction lines. On the contrary, the traction line or lines can be tensioned in a simple manner from the proximal end of the drive body. Generally, the drive body has a cap at its proximal end, which can be separated from the drive body in a simple manner. By tensioning the traction lines parallel to the longitudinal axis of the shaft, a particularly simple and reliable tensioning can be performed.

[0007] According to the invention, it can further be provided that the tensioning means is a screw which can be tightened in parallel with the shaft in the drive body or screwed together with the pull wire pusher dog in the drive body, wherein the screw is screwed into the drive body from the proximal side, preferably from the open proximal side of the drive body. Since the pull wire or wires are tightened from the proximal end along the axis of the shaft, heating the wire for tensioning is superfluous. This simplifies the entire installation of the Albaran mechanism.

[0008] In particular, the invention can further provide that the screw head of the screw is kinematically coupled to the cover, wherein by tightening the screw the cover is pulled into the drive body or the pull-wire finger and the at least one pull wire can be tensioned between the cover and the pull-wire finger. Thus, a defined force can be applied by the screw in order to tension the wire between the cover and the pull-wire finger. This defined pretensioning ensures a high degree of reliability of the mechanical connection to the Albaran lever.

[0009] The invention can also provide that the cover has a trapezoidal cross section or is designed as a truncated cone, wherein the trapezoidal cross section or the truncated cone tapers toward the distal end of the shaft and the drive body or the pull-wire finger has a corresponding receptacle for accommodating the cover. The cross section of the cover can in particular describe an isosceles trapezoid or an arbitrary trapezoid. The mutually corresponding shapes of the cover and the pull-wire finger allow for a particularly effective and secure tensioning of the wire. By tightening the screw, the cover is automatically pulled into a correspondingly designed receptacle of the pull-wire finger. During this tensioning process, the wire or wires are kept taut in order to obtain the required mechanical tension between the toggle lever and the rod. Since the cross section of the cover is polygonal and preferably rectangular when viewed in the axial direction, it can be ensured that the cover does not rotate together when the screw is tightened in the pull-wire finger. Instead, the cover is tilted with its corners in the receptacle of the pull-wire finger. In order to better adapt to the shape of the drive body or the pull-wire finger or to make optimal use of the available space, it is conceivable that at least one side of the cover is convex, wherein the convexity can correspond to the shape of the drive body.

[0010] Another embodiment of the invention can provide that the circumference of the cover is structured or roughened to increase the friction resistance between the circumference and the wire and the receptacle for tensioning. The roughening can also be performed, for example, by sandblasting. When greater forces act on the Albaran lever, this roughness will prevent the traction wire from being pulled out of the drive body.

[0011] A particularly advantageous embodiment of the invention can provide that the at least one traction wire and the screw for tightening the wire are arranged in the drive body below the axis of the toggle lever oriented transversely to the longitudinal axis of the shaft. By means of this geometry or positioning of the tensioning mechanism, the body provides space for further ports or openings in the body for inserting further tools or instruments.

[0012] Preferably, provision can also be made that the distal end of the line can be pulled through at least one opening in the drive body or the pull line finger to tension the at least one pull line, and the line end can be tensioned between the cover and the receptacle by tightening the cover.

[0013] A drive body for accomplishing the above-mentioned task has the features of the eighth aspect of the present invention. Therefore, it is provided that the drive body is constructed according to at least one of the first to seventh aspects of the present invention.

[0014] A method for achieving the above-mentioned object has the measures described in the ninth aspect of the present invention. Therefore, the present invention provides that the traction line is tensioned by a tensioning mechanism parallel to the longitudinal axis of the Albaran mechanism.

[0015] Furthermore, the invention can provide that one and in particular two pull wires are guided through the drive body or the pull wire pawl and that the proximal ends of the pull wires are tensioned by tensioning the tensioning mechanism between the receptacle of the pull wire pawl and the circumference of the tensioning mechanism and in particular a cover screwed on by a thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] A preferred embodiment of the present invention will be described in detail below with reference to the drawings, wherein:

[0017] Figure 1 A schematic diagram showing the Albaran mechanism,

[0018] Figure 2 Show according to Figure 1 A view of the proximal end of the Albaran body, and

[0019] Figure 3 A perspective view of the cover is shown.

[0020] Reference numerals list

[0021] Reference numerals list

[0022] 10 Albaran Agency

[0023] 11 Remote

[0024] 12 Axis

[0025] 13 Proximal

[0026] 14 Section Line

[0027] 15 Main Body

[0028] 16 ports

[0029] 17 Driver

[0030] 18 Elbow axis

[0031] 19 Elbow

[0032] 20 Albaran Lever

[0033] 21 Pull Line

[0034] 22 tubes

[0035] 23 Pull line claw

[0036] 24 Operating mechanism

[0037] 25 threaded holes

[0038] 26 channels

[0039] 27 Screws

[0040] 28 Cover

[0041] 29 Seats

[0042] 30 holes

[0043] 31 Sidewall DETAILED DESCRIPTION

[0044] exist Figure 1 1 shows a possible embodiment of an Albaran mechanism 10 according to the present invention. For the sake of clarity, only the distal end 11 of the shaft 12 and the proximal end 13 of the Albaran mechanism 10 are shown. The elongated tubular shaft 12 is only partially shown due to the indicated section line 14. Since the sections of the shaft 12 not shown do not have features that are important to the present invention, this abridged representation is sufficient for understanding the present invention.

[0045] The proximal end 13 of the Albaran mechanism 10 is formed by a body 15. The body 15 is directly connected to the shaft 12. When the elongated shaft 12 is introduced into the patient's body so as to treat or operate on the patient, the body 15 remains outside the body and is used to provide various tools or auxiliary tools to perform the operation. For this purpose, two tubular ports 16 are assigned to the body 15, for example, through which tools or other auxiliary tools not shown can be guided through the shaft 12 to the distal end 11 of the Albaran mechanism 10 during the operation, to the surgical site. For the sake of clarity, the proximal end of the port 16 or, for example, a subsequent valve is not shown here either. As described above for the shaft, these also represent features that are not important for the description of the present invention.

[0046] The main body 15 also has a drive body 17. Perpendicularly to the longitudinal axis of the Albaran mechanism 10 or the shaft 12, the elbow axis 18 of the elbow 19 extends through the drive body 17. The Albaran lever 20 on the distal end 11 of the Albaran mechanism 10 can be operated by operating the lever-shaped elbow 19 or rotating the elbow 19 around the shaft axis 18. The Albaran lever 20 is used as an auxiliary tool during surgery or treatment. By operating this lever 20, other tools that are not shown and are introduced into the body by other surgical instruments such as endoscopes or cystoscopes can be assisted. By tilting the Albaran lever 20 clockwise, flexible forceps can be moved in the body, for example.

[0047] In order to operate the Albaran lever 20, the drive body 17 or the toggle lever 19 is kinematically coupled to one or two pull wires 21. The pull wires 21 can be guided through a tube 22 inside the shaft 12 or outside the shaft 12. The tube 22 extends parallel to the shaft 12 from the proximal end 13 to the distal end 11 or to the Albaran lever 20. There, the pull wires 21 are coupled to the Albaran lever 20 so that operation of the Albaran lever 20 is possible. At the proximal end of the pull wire 21, it is connected in the drive body 17 or to a pull wire finger 23. The pull wire 21 is tightened between the pull wire finger 23 and the Albaran lever 20, i.e., the at least one pull wire 21 is mounted under mechanical tension between the pull wire finger 23 and the Albaran lever 20 in the body 15 or the tube 22 or the shaft 12. By operating the toggle lever 19 about the toggle lever axis 18, the at least one pull wire 21 is further tightened, so that the Albaran lever 20 rotates about the pivot axis. As soon as the toggle lever 19 is rotated in the opposite direction, the mechanical tension acting on the traction wire 21 is reduced and the Albaran lever 20 moves back to its starting position. Figure 2 As shown, it has two actuating members 24. These lever-shaped actuating members 24 are distributed on the toggle lever 19 to both sides of the body 15.

[0048] Figure 2It is ensured that the open proximal end of the body 15 or the drive body 17 is visible. A cap, not shown, can be placed on the open end of the body 15 and closed by means of a screw and a threaded hole 25. The channel 26 is arranged centrally in the drive body 17 and extends through the entire Albaran mechanism 10 and through the shaft 12 to the distal end 11. Optical devices can be guided through the channel 26, for example, in order to perform an operation. The optical device, not shown, is used, for example, to observe the operation or to control the Albaran lever 20 in a targeted manner.

[0049] The pull line finger 23 has a screw 27, in particular a countersunk screw, below the channel 26 and below the toggle axis 18. The screw 27 is screwed into the drive body 17, specifically parallel to the longitudinal axis of the shaft 12. With the screw 27, the cover 28 ( Figure 3 ) is inserted or locked in the receptacle 29 of the pull line finger 23. For this purpose, the screw 27 is guided through the hole 30 of the cover 28. The cover 28 can be designed to be conical, wherein its circumference tapers toward the distal end 11. However, it is also conceivable that the cover 28 has a trapezoidal cross section or is designed in the shape of a truncated cone. The trapezoidal cross section or truncated cone of the cover 28 also tapers toward the distal end of the shaft ( Figure 3 ). The drive body 17 or the pull-wire finger 23 has a receptacle 29 corresponding to the shape of the cover 28 for achieving a form fit. This corresponding shape of the cover 28 and the pull-wire finger 23 allows a particularly efficient and reliable, in particular form-fitting wire tensioning. By tightening the screw 27, the cover 28 is automatically pulled into the correspondingly designed receptacle 29 of the pull-wire finger 23. The polygonal, preferably rectangular, cross-section of the cover 28 ensures that the cover 28 does not rotate together when the screw 27 is tightened. Due to its shape, the cover 28 is tilted in the receptacle 29 of the pull-wire finger 23. As shown Figure 3 The exemplary embodiment of the cover 28 shown has a convex side wall 31. By means of such a shaping of the side wall 31, the cover 28 can be better adapted to the shape of the drive body 17 or the pull-wire finger 23.

[0050] In the embodiment of the Albaran mechanism 10 shown here, in order to install the traction wire 21, the traction wire is pulled out from the distal end 11 of the Albaran mechanism 10 through the tube 22 and the main body 15 or the drive body 17. Then, the proximal end of the traction wire 21 is pulled through one or two openings in the traction wire pusher 23 parallel to the threaded hole of the screw 27. While the two traction wires 21 are kept under mechanical tension, the screw 27 is screwed into the receptacle 29 together with the cover 28. Thus, the traction wire 21 is tightened between the receptacle 29 and the circumference of the cover 28. This tightening can be performed very simply because no other tools or method steps are required. By purposefully applying a specified torque on the screw 27, the traction wire 21 can be tensioned with high precision and reliability. After the free end of the traction wire 21 is cut off, the cap can be screwed onto the main body 15. In order to increase the tensioning force acting on the traction wire 21, the circumference of the cover 28 can be roughened. This roughening creates friction between the receptacle 29 , the cover 28 and the wire 21 , which results in a higher tensioning force.

[0051] It should be pointed out explicitly that the features described here are not limited to the illustrated embodiment using the Albaran mechanism 10. Rather, it is conceivable that the features or measures according to the invention can also be used in conjunction with other surgical instruments.

Claims

1. An Albaran mechanism (10) having a shaft (12), an Albaran lever (20) being provided at the distal end (11) of the shaft and a body (15) having a drive body (17) being provided at the proximal end (13) of the shaft, wherein: The Albaran lever (20) can be moved by at least one traction wire (21) passing through a toggle rod (19) on the drive body (17), and the proximal end of the at least one traction wire (21) is tightened in the drive body (17) by a tightening mechanism, wherein the tightening mechanism can be connected to the drive body (17) in order to tighten the at least one traction wire (21) parallel to the longitudinal axis of the shaft (12), characterized in that the tightening mechanism is a screw (27) that can be tightened in the drive body (17) parallel to the shaft (12). The invention relates to a drive body (17) or a drive body (17) in which a traction line finger (23) can be screwed together, wherein the screw (27) can be screwed into the drive body (17) from the proximal side of the drive body (17), wherein the screw head of the screw (27) is coupled to the movement of a cover (28), wherein the cover (28) is pulled into the drive body (17) or the traction line finger (23) by tightening the screw (27), and the at least one traction line (21) can be tightened between the cover (28) and the traction line finger (23).

2. The Albaran mechanism (10) according to claim 1, characterized in that: The cover (28) has a trapezoidal cross section or is designed in the shape of a truncated cone, wherein the trapezoidal cross section or the truncated cone tapers toward the distal direction of the shaft (12), and the drive body (17) or the pull line finger (23) has a corresponding receptacle (29) for accommodating the cover (28).

3. The Albaran mechanism (10) according to claim 2, characterized in that: The peripheral surface of the cover (28) is structured or roughened to increase the friction resistance between the peripheral surface, the traction wire (21) and the receptacle (29) for tensioning.

4. The Albaran mechanism (10) according to claim 1, characterized in that: The at least one traction wire (21) and a screw (27) for tightening the at least one traction wire (21) are arranged in the drive body (17) below an axis of the toggle lever (19) oriented transversely to the longitudinal axis of the shaft (12).

5. The Albaran mechanism (10) according to claim 1, characterized in that: In order to tighten the at least one traction wire (21), the distal end of the at least one traction wire (21) can be pulled through the drive body (17) or through at least one opening in the traction wire pusher claw (23), and the wire end can be clamped between the cover (28) and the receptacle (29) by tightening the cover (28).

6. The Albaran mechanism (10) according to claim 1, characterized in that: in, The screw (27) can be screwed into the drive body (17) from the open proximal side of the drive body (17).

7. A drive body (17) for an Albaran mechanism (10) according to claim 1.

8. A method for tightening at least one traction wire (21) in a drive body (17) to operate an Albaran lever (20) of an Albaran mechanism (10) according to any one of claims 1 to 6, characterized in that: The traction wire (21) is tensioned by a tensioning mechanism parallel to the longitudinal axis of the Albaran mechanism (10).

9. The method according to claim 8, characterized in that A pulling wire (21) is guided through the driving body (17) or the pulling wire pusher claw (23), and the proximal end of the pulling wire (21) is tightened between a receptacle (29) in the pulling wire pusher claw (23) and a peripheral surface of the tightening mechanism by tightening the tightening mechanism.

10. The method according to claim 9, characterized in that Two traction wires (21) are guided through the drive body (17) or the traction wire pusher dog (23).

11. The method according to claim 9, characterized in that The proximal end of the pulling wire (21) is tightened between a receiving seat (29) in the pulling wire finger (23) and a peripheral surface of a cover (28) tightened by a screw (27) by the tightening of the tightening mechanism.

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