阅读说明：本技术 用于简单地制造清洁优化的器械弹簧的方法 (Method for the simple production of a cleaning-optimized spring for an instrument ) 是由 罗伯特·福格特赫尔 于 2020-03-03 设计创作，主要内容包括：本公开涉及一种用于制造医疗手持器械(2)的方法,该医疗手持器械(2)具有两个能相对彼此枢转的抓握元件(14、16)和弹性元件(28),该方法具有能以如下顺序执行的方法步骤：-提供两个所述抓握元件(14、16),所述抓握元件(14、16)分别具有在所述抓握元件(14、16)的端部区段上的被构造在所述抓握元件(14、16)上的枢转销容纳孔、以及被构造在所述抓握元件(14、16)上的用于所述弹性元件(28)的铰接孔(36),-提供具有分别布置或构造在每个弹簧端部上的枢转销(44)的弹性元件(28),-将所述弹性元件(28)的所述枢转销(44)插入到尚未彼此枢转耦联的所述抓握元件(14、16)的铰接孔(36)中,并且-使所述抓握元件(14、16)在所述抓握元件(14、16)的枢转销容纳孔的区域中合并,并且通过将枢转销引入到重叠的所述枢转销容纳孔中使所述抓握元件(14、16)枢转耦联。(The disclosure relates to a method for producing a medical hand-held instrument (2), the medical hand-held instrument (2) having two grip elements (14, 16) that can be pivoted relative to each other and a spring element (28), the method having method steps that can be carried out in the following order: -providing two of the gripping elements (14, 16), the gripping elements (14, 16) each having a pivot pin receiving hole configured on the gripping element (14, 16) on an end section of the gripping element (14, 16) and a hinge hole (36) configured on the gripping element (14, 16) for the elastic element (28), -providing an elastic element (28) having a pivot pin (44) arranged or configured on each spring end, respectively, -inserting the pivot pins (44) of the elastic element (28) into the hinge holes (36) of the gripping elements (14, 16) which are not yet pivotally coupled to one another, and-merging the gripping elements (14, 16) in the region of the pivot pin receiving holes of the gripping elements (14, 16) and joining the gripping elements (14, 16) by introducing a pivot pin into the overlapping receiving holes, 16) Pivotally coupled.)

1. A method for producing a medical hand-held instrument (2), the medical hand-held instrument (2) having two preferably structurally identical gripping elements (14, 16) which can be pivoted relative to one another and a spring element (28) which is preferably designed according to a leaf spring design, the method having the following method steps:

-providing two gripping elements (14, 16), the gripping elements (14, 16) each having a pivot pin receiving hole configured on the gripping element (14, 16) on an end section of the gripping element (14, 16) and a hinge hole (36) for the elastic element (28) configured on the gripping element (14, 16), preferably slotted in a middle section of the gripping element (14, 16),

-providing the elastic element (28), the elastic element (28) having a pivot pin (44) arranged on each spring end or preferably constructed integrally of material with the elastic element (28), respectively,

-inserting the pivot pin (44) of the elastic element (28) into the hinge hole (36) of the grip elements (14, 16) not yet pivotally coupled to each other, and

-merging the gripping elements (14, 16) in the region of the pivot pin receiving holes of the gripping elements (14, 16), and pivotally coupling the gripping elements (14, 16) by introducing a pivot pin (9), preferably rivet-shaped or bolt-shaped, into the overlapping pivot pin receiving holes.

Technical Field

The invention relates to a method for producing a medical hand-held instrument, in particular of the jaw or scissor construction type, having two grip elements or grip handles which can be pivoted relative to one another, and having a spring element, preferably a leaf spring, which is bent in a U-or V-shape and has two spring element ends which are each connected to one of the two grip elements, so that when at least one of the two grip elements is pivoted from a basic position, a pivoting back into the basic position can be effected by means of the spring element.

Background

DE 102017114260 a1 shows a medical hand-held instrument with two grip elements which can be pivoted relative to one another and with a spring element having two spring element ends. The spring element ends are each connected to one of the two gripping elements, so that when at least one of the two gripping elements is pivoted from the basic position, a pivoting back into the basic position can be achieved by means of the spring element. The hand-held instrument is characterized in that at least one of the two spring element ends is connected to the respective gripping element by a positive fit, which is produced by deformation of the spring element. Furthermore, DE 102017114260 a1 discloses a method for producing a medical hand piece.

DE 202010007995U 1 discloses an instrument in which a leaf spring of one-piece type is screwed onto one side of the instrument or one side of an instrument handle and rests with its free end against the opposite side of the instrument or another instrument handle. This involves some disadvantages: in general, in surgical instruments, the thread should be dispensed with as good as possible, since the gap between the nut thread and the screw is not generally cleanable. In the device according to DE 202010007995U 1, the leaf spring bears directly against the inside of the device in the region of the screw connection, so that a very narrow, uncleanable gap is also produced between the leaf spring and the device. Moisture or cleaning liquid may dry very poorly from the gap and may cause corrosive effects over a period of time. Furthermore, the leaf spring is perforated in this corrosion-prone region and weakened with regard to its geometry, whereby the leaf spring is at risk of breaking at this location. During movement or use of the instrument, the free leaf spring ends rub in the bearing region on the opposite instrument side. This friction deteriorates the surface quality of the bearing region over time and there likewise increases the susceptibility to corrosion.

DE 202009002433U 1 discloses an instrument with two grip limbs, each of which is provided with a screwed leaf spring part. In order to pivot the two grip limbs back into the basic position, the two leaf spring portions bear against one another. With regard to its cleanability, the instrument according to document DE 202009002433U 1 has the same disadvantages as the instrument according to document DE 202010007995U 1, in particular due to its threaded connection. Furthermore, there is a relatively sharp plug connection in the contact region of the two free leaf spring ends. Since this position is in the center of the easily accessible gripping area of the instrument, the surgical glove of the user can be easily cut or damaged here. Moreover, even if the connection site is deburred well in the new state of the appliance, some wear and burrs will be formed depending on several applications.

In both of the aforementioned documents DE 202010007995U 1 and DE 202009002433U 1, too, they show to be cumbersome and sensitive in terms of manufacturing. A bolt for fastening the spring is screwed through a hole in the leaf spring into a thread in the handle. It is important in this working step that the bolts are tightened with sufficient torque so that they do not loosen due to transport, vibrations or instrument movement. This cannot be guaranteed in the event of contamination and the resulting thread stiffness. Furthermore, the spring mechanism can be simply exchanged, but can be handled simply to the same extent. The user may simply loosen the bolts for cleaning. However, after cleaning, it cannot be ensured that the user also fastens the bolts again as intended. Thus, the screw may be lost and cause interference during the clinical procedure.

Document DE 202009001809U 1 relates to a device whose spring mechanism, as in the device according to document DE 202009002433U 1, consists of two screwed leaf spring parts. In order to at least avoid the above-mentioned disadvantages of a sharp-edged plug-connection position, a ball and socket geometry is provided between the leaf spring portions. However, the instrument according to DE 202009001809U 1 is disadvantageous in terms of its cleanability owing to the threaded connection and the ball and socket geometry. Furthermore, the spring mechanism according to DE 202009001809U 1 is complicated to produce, since the geometry shown has to be welded to the free leaf spring ends or has to be complexly milled.

Document DE 202011052256U 1 describes an apparatus whose spring mechanism comprises a screwed leaf spring portion and a second portion which is supported in an articulated manner on the free end of the leaf spring portion. Due to the complexity of the screw connection and the spring mechanism, the instrument according to document DE 202011052256U 1 is also difficult to clean and cumbersome to manufacture.

Such instruments are described, for example, in DE 10137915B 4, DE 102007030874B 4 or DE 102014102606 a1, in which the spring mechanism is at least partially formed integrally with the respective grip portion in a cumbersome manner. These instruments are disadvantageous not only due to their cumbersome manufacture but also due to the poor replaceability or detachability of the leaf spring portion.

Disclosure of Invention

In view of the method for producing an instrument according to the prior art, the object of the invention is to provide a cost-effective and time-saving method for producing a medical hand-held instrument which can be easily cleaned, is relatively little worn and/or is relatively easy to repair.

This object is achieved by a method for producing a medical hand-held instrument having the steps of claim 1. Advantageous developments are the subject matter of the dependent claims.

The invention therefore relates to a method for producing a medical hand-held instrument having two grip elements/grip branches (grip lever, lever arm) which can be pivoted relative to one another and a spring element (pretensioning spring) which is preferably bent in a U-or V-shape, in particular in the form of a leaf spring. Each of the two ends of the elastic element (elastic element end) is then connected to a respective one of the two gripping elements. The two gripping elements are then connected to one another in such a way that when at least one of the two gripping elements is pivoted from the basic position relative to the other gripping element, a pivoting back into the basic position can be achieved by means of the elastic element.

In other words, the method for producing a medical hand piece provides in particular the following method steps in the stated order:

a) two preferably structurally identical (instrument) grip elements are provided, each having a pivot pin receiving bore formed thereon on an end section of the grip element and a hinge bore formed, preferably slotted, further preferably in a middle section of the grip element for an elastic element, preferably in the form of a leaf spring construction,

b) providing a spring element having a pivot pin arranged on each spring end or preferably integrally constructed with the spring element material,

c) inserting the pivot pin of the elastic element into the hinge hole of the instrument gripping element which is not yet pivotally coupled to one another, and

d) the instrument gripping element is incorporated in the region of its pivot pin receiving holes and is pivotally coupled by introducing pivot pins, preferably rivet-shaped or bolt-shaped, into the overlapping/aligned pivot pin receiving holes.

In this way, the assembly of the medical hand-held instrument is simplified and the instrument properties, in particular the spring pretensioning, can be reproduced.

The method according to the invention for producing a medical instrument is characterized in particular in that the pivot pin of the elastic element is inserted into the articulation hole before the grip element is combined and pivotally coupled. In other words, the elastic element is configured such that it can hook onto the respective grip element without having to be deformed before, during or after hooking.

In a preferred embodiment, the form-fitting connection of the two spring element ends to the respective gripping elements can thus be ensured by the connection of the two gripping elements. Reliable operation of the medical hand-held instrument is thus ensured without additional working steps.

Furthermore, the two gripping elements can preferably be connected and disconnected in a form-fitting manner, so that the medical hand-held instrument can be detached for cleaning or repair simply by releasing the gripping element connection.

According to the invention, the hinge bore/receptacle can be configured in the production method in such a way that it receives the respective spring element end in a form-fitting manner according to the key-locking principle. In this case, the receptacles may be of substantially annular design and each have a slot section, through which the respective spring element end can be introduced into the associated receptacle. Furthermore, two opposite recesses can be formed in each case on the spring element end, which recesses surround the receptacle after the spring element end has been introduced into the receptacle.

In other words, two opposite recesses can be formed on the spring element ends, so that the spring element ends as pivot pins each have a T-shaped end section. The cross members of the end sections of the T can in each case serve as pivot axes.

Drawings

The invention is described in more detail below with the aid of preferred embodiments and with reference to the attached drawings. Wherein:

FIG. 1 shows a perspective detailed view of a medical hand-held instrument manufactured using a method according to the present invention, according to a preferred embodiment;

FIG. 2 illustrates a perspective detailed view of the hooking of the ends of the elastic element with the grip element according to a preferred embodiment; and is

Fig. 3 shows a top view of an end of an elastic element according to a preferred embodiment.

Identical or functionally equivalent features are provided with the same reference symbols in the various figures.

Detailed Description

Fig. 1 shows a medical handpiece 2 according to a preferred embodiment. The hand-held instrument 2 is constructed according to the jaw or scissor construction type. That is, the hand-held instrument has two levers/instrument branches 4 and 6 which are pivotably connected to each other by a hinge 8. For this purpose, the levers 4 and 6 each have a (pivot pin) receiving opening in the region of the hinge 8, which receiving openings are combined in such a way that the center axes of the receiving openings are substantially aligned for the purpose of mounting the medical hand piece 2. As described below, upon the merging of the levers 4 and 6, the rivet 9 is guided through the receiving hole and the two levers 4 and 6 are thus connected to one another by the hinge 8. The rivet 9 is here an example of a "pivot pin":

the section of the handpiece 2 on one side (distal side) of the hinge 8 is a mouth section 10 (only partially shown). The section of the other side (proximal side) of the hinge 8 is a grip section 12. The proximal end portions of the levers 4 and 6 constituting the gripping section 12 of the hand-held instrument 2 are referred to below as gripping elements 14 and 16.

The gripping element 14 of the lever 4 and the gripping element 16 of the lever 6 are designed substantially symmetrically to one another. The two grip elements 14 and 16 each have a recess 18 adapted to the hand of a person on the side facing away from the respective other grip element 16 and 14 in order to ensure a good tactile sensation when gripping the hand-held instrument 2. On the proximal side of the grip section 12, on the free ends of the grip elements 14 and 16, the grip elements 14 and 16 have grip protrusions 20 and 22 on the side remote from the respective other grip element 16 and 14. Likewise, the grip elements 14 and 16 have grip protrusions 24 and 26, respectively, on the side facing away from the respective other grip element 16 and 14, away from the width of one hand from the free end. The grip protrusions 20 and 24 or 22 and 26 respectively adjoin regions on the grip elements 14 and 16 on which the user preferably grips or should preferably grip the grip section 12. Here, the grip protrusions 20 and 24 or 22 and 26 are determined to prevent the user's fingers from slipping off.

Between the grip elements 14 and 16, a resilient element 28 is provided. The spring element 28 is substantially U-shaped or V-shaped and has two legs 30 and 32 which are connected to one another by an arc-shaped section 34.

The two legs 30 and 32 and the curved section 34 are integrally formed in the form of a bent leaf spring, preferably made of spring steel.

Fig. 2 and 3 show in detail the hooking of one of the two spring element ends to the respective gripping element 14, 16 and the design of the spring element end in the medical hand piece 2 produced according to the invention. It is noted that fig. 2 is not a sectional view, but a hatching of the elastic element 28 is used for a better overview. In fig. 2, only the connection between the leg 30 of the elastic element 28 and the grip element 14 is also shown. It goes without saying, however, that the connection between the leg 32 and the grip element 16 is identically designed.

The grip element 14 has two projections/receptacles/hinge holes 36 on the side facing the other grip element 16 (not shown) which extend in the direction of the other grip element 16 and which extend parallel to the direction of extension of the grip element 14. At their respective free ends, the receptacles 36 each have a bearing bore 38, which each has a slot 40 extending to the edge of the respective receptacle 36. The width of the slit 40 is only insignificantly larger than the thickness of the elastic element 28.

As shown in fig. 3, the connecting section of the spring plate-shaped spring element 28 has two recesses/cutouts 42, which are arranged such that a T-shaped end section 44 is formed on the spring element 28. In other words, the connecting section has two projections arranged such that a T-shaped end section 44 is formed. The cross-piece of the T-shaped end section 44 serves as a pivot axis for the spring element 28 in the mounted state. The T-shaped end section 44 is thus here an example of a "pivot pin" for the spring element 28.

In order to hook the spring element 28 with the respective gripping element 14 according to the preferred embodiment, the cross-piece of the T-shaped end section 44 is pushed through the slot 40 into the bearing bore 38. The legs 30 of the spring element 28 must be oriented parallel to the slot 40 during this pushing-in (see the installation position a shown in fig. 2). The same is true for the other gripping element 16 (not shown) in order to mount the elastic element 28.

Finally, the two grip elements 14, 16 are connected to one another on the hinge 8 in order to fixedly hook or fasten the elastic element 28 to the grip elements 14, 16. In the manufacturing method according to the preferred embodiment, the two gripping elements 14, 16 are riveted to each other on the hinge 8. However, the connection can also be embodied in any other way, for example as a screw connection.

In other words, according to the invention, the spring element 28 is first hooked with the spring element end of the respective leg 30, 32 in the receptacle of the respective grip element 14, 16 and this hooking is then fixed and secured by the connection of the two grip elements 14, 16 on the hinge 8 with the rivet 9.

The situation in which the cross beam is confined in the bearing eye 38 and can no longer move through the slit 40 (see basic position B in fig. 2) remains so long until the legs 30, 32 of the spring element 28 are not intentionally pivoted into the mounting position a. However, such pivoting of the legs 30, 32 of the elastic element 28 into the mounting position a only occurs when the elastic element 28 is intentionally bent or when the connection between the grip elements 14, 16 is released.

In particular in the normal pivot region C (see fig. 2), in which the legs 30, 32 of the spring element 28 move during use of the hand-held instrument 2, the end sections of the spring element 28 are held in a defined manner in the receptacles 36 or in the bearing eyes 38 of the gripping elements 14, 16.

The embodiments of the medical hand piece which are shown in fig. 1 to 3 and described above and which are produced by the method according to the invention are merely examples of possible embodiments of the claimed invention.