DE102007040290B4 - Medical hand-held device - Google Patents

Abstract

Medical hand-held device, comprising a handle (1) and a head (2), which adjoins the handle (1) and carries a tool (3), wherein the handle (1) is associated with an actuating member (5) which is actuated by an actuating mechanism (5). 6) in the head (2) acts on the tool (3) for its actuation, the head (2) together with the tool (3) relative to the handle (1) rotatable and from the handle (1) is removable, wherein the head (2) is releasably connected to the handle (1) via a coupling part (7), the head (2) rotating on the coupling part (7), the coupling part (7) being on the side facing the handle (1) an insertion region (8) for insertion of a connection region (9) of the grip (1) and on the side facing the head (2) a receiving region (10) for rotatably receiving the head (2), characterized in that the receiving region (10 ) of the coupling part (7) has an outer running surface (14) for r has a guide bush (15) of the head (2) and an internal thread (16) for a clamping screw (17) and that the clamping screw (17) has a limit or a stop for the guide bush (15).

Description

The invention relates to a medical hand-held device, in particular a surgical hand-held device, preferably for use in ophthalmology, with a handle and a handle, a tool-carrying head, wherein the handle is associated with an actuating member, which via an actuating mechanism in the head inside on the tool to its operation acts.

Medical hand tools are known in many different ways from the practice. It is essential that the regularly held by a tool holder tool is to be operated from the handle ago. Often the tool can be moved from an external working position into a storage position lying in the housing.

Also known from practice surgical devices in which a pair of pliers or scissors is provided as a tool. The pliers or scissors or the corresponding jaw part is actuated, for example, by being pulled at least partially into a guide tube, whereby the mouth closes. The general state of the art is merely an example of the EP 0 870 472 A1 directed. From the document US 5893877 A is a generic medical handset with the features in the preamble in claim 1.

However, the hand-held devices known from practice, in particular vitrectomy instruments with a pair of pliers or scissors, are problematic in practice, since the jaw part has to be replaced by usual wear or improper handling. In addition, it is necessary that the tool be moved due to the opening and closing movement, i. due to a preferred direction, is kept properly positioned. However, turning the entire handset is cumbersome, if not impossible, for the surgeon in use.

The present invention is therefore based on the object, a medical handset of the generic type to design and further develop that it can be easily and conveniently handled both in terms of handling and with respect to the tool exchange.

The above object is achieved by a medical hand-held device with the features of claim 1. Further developments follow in the dependent claims. Thereafter, the generic type handset is characterized in that the head is rotatable together with the tool relative to the handle and removable from the handle.

According to the invention it has been recognized that it is possible to facilitate the handling of the handset by a simple measure, namely the fact that the head is rotatable together with the tool relative to the actual handle or the handle. This makes it possible to turn the preferred direction having tool, such as a pair of pliers or scissors, held handle in the desired position without having to embrace it. At the same time it is possible to remove the rotatable head from the handle, namely to replace the entire head with tools or only the tool. In addition, the removal of the head allows a cleaning of the head, together with the tool, while on the handle a serving for replacement head can be attached.

In terms of design, it is advantageous if the head is releasably connected via a special coupling part with the handle, namely via a coupling part on which the head is rotatably mounted in the attached state. In concrete terms, the coupling part on the side facing the handle comprises a plug-in region for inserting a connection region of the handle. In other words, the head with its coupling part can be plugged onto the connection region of the grip piece. It is also conceivable that a reverse arrangement is chosen, namely that the handle is attached to the end of a correspondingly formed coupling part.

On the side facing the head, the coupling part comprises a receiving area, which serves for rotatably receiving the head.

With respect to the insertion region of the coupling part, it is of further advantage if it is surrounded by a grip sleeve, which is preferably adapted to the outer diameter of the grip. The gripping sleeve is preferably screwed onto the coupling part, against a shoulder-like stop, which is formed between the insertion region and the receiving region of the coupling part. The coupling part is preferably made in one piece.

Furthermore, it is advantageous if the insertion region of the coupling part has a catch, preferably in the form of a latching, screw connection or the like, for holding the inserted connection region of the grip piece. By this locking it is ensured that the head or the coupling part does not unintentionally detached from the handle.

For actuating the tool, the connection region of the grip piece has an actuating mechanism which, in the mounted state, extends from the actuating member of the grip piece into the coupling part.

As already stated above, the receiving area of the coupling part serves to rotatably receive the actual head. For this purpose, the receiving area has an outer running surface for a guide bush of the head. Furthermore, an internal thread for a clamping screw is provided on the inside of the receiving area, wherein the clamping screw has a limit or a stop for the guide bushing. By screwing in the clamping screw, the guide bush between the shoulder of the coupling part and a collar or head of the clamping screw can be more or less clamped, whereby the guide bush can rotate smoothly or more sluggish on the tread of the coupling part. As a result, the rotation of the head can be set exactly to the specific needs of the person handling the operation or of the surgeon.

The guide bushing forms a plain bearing with respect to the receiving region of the coupling part or with respect to the running surface of the coupling part, over which the head can be rotated in accordance with the above explanations. The rotatability of the head can be favored in relation to the guide bush in that it is made of a lubricious plastic, preferably made of Teflon. This results in very special advantages without lubrication of the bearing thus formed is required.

The head itself has a connection area, via which it can be connected to the coupling part or its receiving area. This connection region has an internal thread, which serves for screwing onto an external thread of the guide bush. A locking or locking by means of screw is conceivable.

For better handling or rotation of the head of the connection area is equipped with an outer knurled edge. By arranging the knurled edge, the head can be gripped better and rotated according to the need for the handle.

As previously mentioned, the tool is actuated from the handle by actuating an actuator and via the actuating mechanism through the terminal portion of the handle into the head. For this purpose, the coupling part, in particular the receiving region of the coupling part, a passage for receiving a displaceable in the longitudinal direction slider. The serving for positioning or holding the guide bushing clamping screw is screwed from the side facing the tool in the passage and acts with a head or collar or with a shoulder against the plugged onto the receiving portion of the coupling part guide bushing.

The clamping screw also has a central passage through which a slide which can be actuated from the handle piece via the actuating mechanism extends. The slider is rotatably arranged as well as the clamping screw and can be moved laterally in the head, namely on an actuation by the actuating mechanism.

Furthermore, it is advantageous if the slide has a central passage in which a serving for adjustment relative to the actuating mechanism of the handpiece adjusting screw is provided, which in turn is screwed directly or indirectly into the slide. The adjusting screw can be used to fine-tune the operating mechanism, using simple means. Also, the adjusting screw has a preferably central passage, so that serving for cleaning flow medium from the insertion area can flow into the head. Related benefits will be discussed later.

As already mentioned above, the slide is laterally displaceable within the clamping screw. It has an elongate passage through which extends a receptacle anchored on both sides in the head for holding the tool. In that regard, an additional guidance of the slide is realized, namely under both sides of the slide support against the outer wall of the head.

The tool may be, for example, a pair of pliers or a pair of scissors, wherein the jaw portion of the tool may be made by electroerosion of a one-piece wire. Accordingly, the tool extends with a rod, a wire or the like. From the front end of the head forth through a guide tube into or through the receptacle in which the wire is preferably clamped by means of screws on both sides in the middle of the recording. The two screws can be actuated on both sides of the head from the outside, so that the tool can be released very quickly and pulled out of the receptacle. A simple tool change is possible in this respect.

The slide is actuated via the actuating mechanism, namely, is displaced against the force of a pressure medium within the clamping screw to the front of the head. As a pressure medium is used in a particularly advantageous manner, a spring, preferably a helical or spiral spring, which is arranged in the front region of the head. Accordingly, the front end of the slider comprises a seat for receiving the spring or the slider is operatively connected to a corresponding seat. The spring is supported on the one hand in the seat and on the other hand on a front inner wall of the housing of the head and is compressed during movement of the slide to the opening of the tool mouth. Relieves the actuator mechanism, the slider, it slides back due to the spring force back to its original position, wherein the jaw part of the tool for closing the jaw part is at least slightly pulled into the guide tube, so that the pliers or scissors closes.

The slide is connected to the guide tube and possibly an at least partially surrounding the guide tube or reinforcing outer tube, so that during a relative movement of the slider for receiving the guide tube changes its lateral position relative to the captured in the recording tool. As already mentioned above, the tool projects out of the guide tube with a jaw part forming a pair of pliers or scissors in such a way that when the guide tube is displaced relative to the tool it opens or closes. Safe operation of the tool is thus possible with simple structural means.

It has already been mentioned that the head can be cleaned particularly easily, namely by having a passage for a flow medium serving to clean the head and its internal components. The flow medium may be a cleaning fluid or steam. Concretely, the head on the side facing the tool, preferably immediately adjacent to the tool, an outlet for the flow medium. By this design measure, it is possible that for supplying the cleaning medium, a line can be coupled via a plug-in in the plug-in connector to the head, wherein the cleaning medium can flow completely through the head.

• 1 in einer schematischen Seitenansicht, geschnitten, ein Ausführungsbeispiel eines erfindungsgemäßen Handgeräts, wobei lediglich der Kopf nebst Kopplungsteil und Griffhülse inklusive Werkzeug gezeigt sind,
• 2 in einer schematischen Seitenansicht, geschnitten, das Kopplungsteil,
• 3a/b in einer schematischen Vorderansicht sowie in einer Seitenansicht, geschnitten, die Griffhülse, die auf den Einsteckbereich des Kopplungsteils aufgeschraubt ist,
• 4 in einer schematischen Seitenansicht, geschnitten, die Führungsbuchse aus Teflon,
• 5 in einer schematischen Seitenansicht, geschnitten, die Klemmschraube,
• 6 in einer schematischen Seitenansicht, geschnitten, die Aufnahme zum Festklemmen des Werkzeugs/Drahtes,
• 7 in einer schematischen Ansicht, vergrößert, eine der beiden zum Festklemmen dienenden Schrauben der Aufnahme,
• 8a/b in schematischen Seitenansichten, teilweise geschnitten, den Schieber mit einer Ausnehmung für die Aufnahme,
• 9a in einer schematischen Seitenansicht, geschnitten, die Wandung des Kopfes,
• 9b in einer schematischen Stirnansicht von der offenen Seite her, den Kopf mit Rändelrand und
• 10 in einer schematischen Seitenansicht, teilweise geschnitten, das Führungsrohr zur Aufnahme des Werkzeugs.

There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the patent claim 1 subordinate claims and on the other hand, to refer to the following explanation of an embodiment of the invention with reference to the drawings. In conjunction with the explanation of the preferred embodiment of the invention with reference to the drawing, generally preferred embodiments and developments of the teaching are explained. In the drawing show

• 1 in a schematic side view, cut, an embodiment of a hand-held device according to the invention, wherein only the head together with coupling part and grip sleeve including tool are shown,
• 2 in a schematic side view, cut, the coupling part,
• 3a / b in a schematic front view and in a side view, cut, the grip sleeve, which is screwed onto the insertion region of the coupling part,
• 4 in a schematic side view, cut, the guide bush made of Teflon,
• 5 in a schematic side view, cut, the clamping screw,
• 6 in a schematic side view, cut, the receptacle for clamping the tool / wire,
• 7 in a schematic view, enlarged, one of the two serving for clamping screws of the recording,
• 8a / b in schematic side views, partially cut, the slider with a recess for receiving,
• 9a in a schematic side view, cut the wall of the head,
• 9b in a schematic end view of the open side, the head with knurled edge and
• 10 in a schematic side view, partially cut, the guide tube for receiving the tool.

1 shows an embodiment of a medical hand-held device according to the invention, which in concrete terms is a vitrectomy instrument. The handset includes a in 1 only indicated handle 1 and a subsequent to the handle, shown in detail head 2 , The head 2 carries a tool 3 , where it is in concrete terms a pair of pliers with a jaw part 4 is.

The handle 1 is also an only symbolically illustrated actuator 5 assigned, which via an actuating mechanism 6 in the head 2 into the tool 3 acts to its operation.

According to the invention, the head 2 together with the tool 3 opposite the handle 1 rotatable and is - regardless of the rotation - of the handle 1 removable. Consequently, the entire head can be with the tool rotatably mounted therein 3 opposite the handle 1 rotate. On top of that, the head can be 2 from the handle 1 Remove, for example, for the purpose of cleaning or replacement of another head 2 with other tools 3 ,

It should be noted at this point that it can be a medical hand-held device of any kind according to the invention in which a tool 3 in a head 2 is arranged, which is opposite the handle 1 turn and off the handle 1 can be removed. Any tools 3 can be applied.

1 clearly shows that the head 2 via a coupling part 7 with the handle 1 is detachably connected. The head 2 turns on the coupling part 7 , whereby a very special mechanism is provided for this purpose.

In Konkrekten, the coupling part 7 on the handle 1 facing side a plug-in area 8th on, for plugging in a connection area 9 of the handle 1 serves. On the head 2 facing side has the coupling part 7 a recording area 10 on, for the rotatable recording of the head 2 serves.

The insertion area 8th of the coupling part 7 is from a grip sleeve 11 surrounded, the the outer diameter of the only indicated handle 1 can be adjusted. In addition, the grip sleeve 1 on the coupling part 7 against a stop 12 screwed. The stop 12 is an integral part of the coupling part 7 ,

Furthermore, lets 1 recognize that the insertion area 8th of the coupling part 7 a lock 13 in the form of a latch, which holds the inserted connection area 9 of the handle 1 serves.

The connection area 9 of the handle 1 includes the likewise only indicated actuating mechanism 6 ,

1 further indicates that the recording area 10 of the coupling part 7 an outer tread 14 for a guide bush 15 Of the head 2 having. In addition, the reception area includes 10 of the coupling part 7 an internal thread 16 into which a clamping screw 17 is screwed. The clamping screw 17 defines a limit or stop for the guide bush 15 , At the same time can be over the clamping screw 17 the light or stiffness of the guide bush 15 define, namely against the outer tread 14 a kind of plain bearing for the rotational movement of the head 2 forms. The guide bush 15 is made of Teflon.

1 further reveals that the head 2 a connection area 18 having, with an internal thread 19 Is provided. The internal thread 19 serves to screw on an external thread 20 the guide bush 15 ,

In 1 is further indicated that the connection area 18 Of the head 2 an outer knurled edge 21 having.

Furthermore, it is of particular advantage if the coupling part 7 a passage for receiving a slider 22 Has. The clamping screw 17 is from the tool 3 facing side into the passage and with a collar 23 or flange against the on the receiving area 10 of the coupling part 7 plugged guide bush 15 screwed. Depending on how the clamping screw 17 incorporating the guide bushing 15 is attracted, the head can be 2 over the knurled edge 21 lighter or heavier against the handle 1 or the coupling part 7 rotate.

The clamping screw 17 is also equipped with a central passage through which the handle 1 over the operating mechanism 6 actuated slides 22 extends.

The slider 22 also has a central passage in which one for adjustment with respect to the actuating mechanism 6 of the handle 1 serving adjusting screw 24 is provided. Also the adjusting screw 24 has a preferably central passage.

The slider 22 is inside the clamping screw 17 laterally, ie in the longitudinal direction, displaceable. In addition, the slider points 22 a preferably tapered area with an in 1 unrecognizable, extending in the longitudinal direction recess through which extends a both sides in the head anchored receptacle for holding the tool therethrough.

The tool 3 extends from the front end of the head 2 through a guide tube 26 through to the recording 25 , In the recording 25 is the end of the wire 27 by means of double-sided screws 28 clamped. At the free end of the guide tube 26 is the jaw forming the forceps 4 formed electroerosiv, wherein the jaw part 4 when retracting the guide tube 26 opens and when advancing the guide tube 26 closes. The movement is a pulling in of the wire 27 in the guide tube 26 and vice versa.

Will the slider 22 over the only indicated actuating mechanism 6 pushed forward, he presses against one in the front of the head 2 arranged spring 30 , causing the Spring is tensioned. Will the actuator 5 not pressed further, presses the spring 30 the slider 22 back again, leaving the jaw part 4 closes.

In concrete terms, the slider is 22 with the guide tube 26 and a reinforcing outer tube 31 firmly connected, so that during a relative movement of the slider 22 to record 25 the guide tube 26 its lateral position relative to the tool 3 or opposite the jaw part 4 changed. Due to a rounding at the free end of the guide tube 26 glide the cheeks of the jaw part 4 almost frictionless from the open to the closed position and vice versa.

As mentioned earlier, it is the tool 3 - According to the configuration of the jaw part 4 - a pair of pliers or a pair of scissors. The jaw part 4 so protrudes from the guide tube 26 out that during a displacement of the guide tube 26 opposite the tool 3 or opposite the wire 27 the tool 3 or the jaw part 4 opens or closes.

In 1 is further hinted that the head 2 one for cleaning the head 2 and its inner constituent flow path for a flow medium. The flow medium can be supplied for example via a suitable fitting and a hose, wherein the fitting is similar to the handle 1 is to be flanged. At the front end of the head 2 is an outlet 32 provided by the flow medium from the head 2 can flow out.

2 shows by itself the coupling part 7 with the insertion area 8th and the recording area 10 , with the stop in between 12 for the in 2 not shown grip sleeve 11 is trained.

The 3a and 3b show by itself the grip sleeve 11 for screwing on the insertion area 8th of the coupling part 7 , 3a shows particularly clearly the local knurled edge 33 ,

4 in itself shows the Teflon existing guide bushing 15 with external thread 20 ,

5 shows the clamping screw 17 with an external thread and an end flange 23 ,

In 6 is the recording 25 shown for clamping the wire, not shown there by means not shown screws. One of the screws used for clamping 28 shows 7 ,

The 8a / b show the slider 22 , which has a central recess 34 Is provided. Through the recess 34 sticks out the recording 25 with the screws on both sides 28 therethrough. The end is the slider 22 with a collar 23 equipped for receiving or as an abutment or seat for the spring 30 serves.

The 9a / b show the head housing 35 which is in the connection area 18 with a knurled edge 21 is provided.

10 shows the guide tube 26 with the reinforcing or stiffening outer tube 31 , The tool 3 or the wire is not shown there.

With regard to further features, which can not be inferred from the figures, reference is made to avoid repetition to the general part of the description.

Finally, it should be noted that the above-discussed embodiment is merely illustrative of the handset according to the invention, but this does not limit the embodiment.

LIST OF REFERENCE NUMBERS

1

grip

2

head

3

Tool

4

jaw

5

actuator

6

actuating mechanism

7

coupling part

8th

Insertion area (of the coupling part)

9

Connection area (of the grip)

10

Recording area (of the coupling part)

11

grip sleeve

12

Stop (of the coupling part)

13

lock

14

outer tread (of the receiving area / coupling part)

15

Guide bush (of the head)

16

inner thread, internal thread (of the receiving area / head)

17

clamping screw

18

Connection area (of the head)

19

Internal thread (of the connection area)

20

External thread (the guide bush)

21

Knurled edge (of the head)

22

pusher

23

Collar, flange

24

adjustment

25

admission

26

guide tube

27

wire

28

Screw (in the receptacle)

29

not used

30

feather

31

outer tube

32

outlet

33

Knurled edge (the grip sleeve)

34

Recess in the slide

35

head case

Claims (22)

Medical hand-held device, comprising a handle (1) and a head (2), which adjoins the handle (1) and carries a tool (3), wherein the handle (1) is associated with an actuating member (5) which is actuated by an actuating mechanism (5). 6) in the head (2) acts on the tool (3) for its actuation, the head (2) together with the tool (3) relative to the handle (1) rotatable and from the handle (1) is removable, wherein the head (2) is releasably connected to the handle (1) via a coupling part (7), the head (2) rotating on the coupling part (7), the coupling part (7) being on the side facing the handle (1) an insertion region (8) for insertion of a connection region (9) of the grip (1) and on the side facing the head (2) a receiving region (10) for rotatably receiving the head (2), characterized in that the receiving region (10 ) of the coupling part (7) has an outer running surface (14) f r has a guide sleeve (15) of the head (2) and an inner thread (16) for a clamping screw (17) and that the clamping screw (17) has a limit or stop for the guide bush (15). Handset after Claim 1 , characterized in that the insertion region (8) of the coupling part (7) by a grip sleeve (11) is surrounded. Handset after Claim 2 , characterized in that the grip sleeve (11) on the coupling part (7), preferably against a stop (12), is screwed. Handset after one of the Claims 1 to 3 , characterized in that the insertion region (8) has a detent, preferably in the form of a latching, screw connection or the like for holding the inserted connection region (9) of the grip piece (1). Handset after one of the Claims 1 to 4 , characterized in that the connection region (9) of the handle (1) comprises the actuating mechanism (6). Handset after one of the Claims 1 to 5 , characterized in that the guide bush (15) is made of plastic. Handset after one of the Claims 1 to 6 , characterized in that the head (2) comprises a connecting portion (18) with internal thread (16) for screwing onto an external thread (20) of the guide bush (15). Handset after Claim 7 , characterized in that the connecting region (18) of the head (2) has an outer knurled edge (21). Handset after one of the Claims 1 to 8th , characterized in that the coupling part (7) has a passage for receiving a slider (22). Handset after Claim 9 , characterized in that the clamping screw (17) from the tool (3) facing side into the passage and with a collar (23) against the on the receiving portion (10) of the coupling part (7) plugged guide bushing (15) is screwed , Handset after Claim 9 or 10 , characterized in that the clamping screw (7) has a central passage through which extends from the handle (1) forth via the actuating mechanism (6) operable slide (22). Handset after Claim 11 , characterized in that the slide (22) has a central passage in which an adjustment screw (24) serving for adjustment relative to the actuating mechanism (6) of the handpiece is provided. Handset after Claim 12 , characterized in that the adjusting screw (24) also has a passage. Handset after one of the Claims 11 to 13 , characterized in that the slide (22) within the clamping screw (17) is displaceable. Handset after one of the Claims 11 to 14 , characterized in that the slider (22) has an area with a longitudinal direction extending recess (34) through which an on both sides in the head (2) anchored receptacle (25) for holding the tool (3) extends therethrough. Handset after Claim 15 , characterized in that the tool (3) extends with a rod or a wire (27) from the front end of the head (2) through a guide tube (26) into or through the receptacle (25) and in the receptacle ( 25) is clamped. Handset after one of the Claims 11 to 16 , characterized in that the slide (22) against a in the front region of the head (2) arranged spring (30) is displaceable. Handset after one of the Claims 11 to 17 , characterized in that the slide (22) is connected to the guide tube (26) and optionally to an outer tube (31) reinforcing the guide tube (26) at least in regions, so that during a relative movement of the slide (22) for receiving (25) the guide tube (26) changes its lateral position relative to the tool (3). Handset after Claim 18 , characterized in that the tool (3) with a forceps or scissors forming jaw part 4 protrudes from the guide tube (26) such that upon displacement of the guide tube (26) relative to the tool (3) this opens or closes. Handset after one of the Claims 1 to 19 , characterized in that the head (2) has a passage for a flow medium serving for cleaning the head (2) and its internal components. Handset after Claim 20 , characterized in that the head (2) on the side facing the tool (3) has an outlet (32) for the flow medium. Handset after one of the Claims 1 to 21 , characterized in that for supplying a cleaning agent, a line via a in the insertion region (8) insertable connector to the head (2) can be coupled.

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