DE102022107971A1 - Medical device with automatic tube retraction - Google Patents

Abstract

The present invention relates to a medical device, in particular an infusion device (1) for monitoring and/or controlling fluid, in particular infusion medium, flowing through a hose (6), having a housing which has a first housing part (2) and a second housing part (3 ), which are connected to one another via a joint section (4) in order to open and close the housing, at least a first hose holder (12a) and a second hose holder (12b) for holding the hose (6), which are in a longitudinal direction to one another are spaced apart, and at least one first pivot arm (8), which is pivotally articulated on the first housing part (2) about a first hinge axis (A1), forms the first hose holder (12a) at a distance from the first hinge axis (A1) and further on the second housing part (3) is articulated and/or guided in such a way that when the housing is closed, the second housing part (3) presses directly or indirectly against the first swivel arm (8) in order to swivel the first swivel arm (8) and the first hose holder (12a). to move in the direction of the first housing part (2).

Description

The present invention relates to a medical device, in particular an infusion device for monitoring and/or controlling fluid, in particular infusion medium, flowing through a hose. The device has a housing which has a first housing part and a second housing part, which are connected to one another via a hinge portion for opening and closing the housing, and at least a first hose holder and a second hose holder for holding the hose, which are in a Spaced apart from each other in the longitudinal direction of the hose.

State of the art

In medical technology, fluids are often passed through hoses, which in turn are inserted into functionally interacting devices. An example of this are infusion devices, which are used in medicine to supply liquid infusion agents (e.g. with medication, nutrients, etc.) to a patient through an infusion tube. Such infusion devices often have an infusion pump, which actively pumps the infusion agent to the patient. Alternatively or additionally, a drip can be used, in which the infusion agent flows or drips through the infusion tube due to gravity. Furthermore, infusion devices usually have tube clamps to close the infusion tube and interrupt a flow of infusion agent through the tube. This is relevant, for example, to avoid infusion medium flowing freely through the infusion tube, which can occur, for example, when a fluid bag or the like is changed. In addition, an infusion device can have various sensors and/or actuators, such as valves, clamping stamps, etc.

For example, is off CN 2 533 866 Y a monitoring device for an infusion device is known, in which a heating device and sensor system is provided and which has two housing parts, between which an infusion tube is inserted into receptacles which are arranged on the housing, the tube being placed to match the heating device and the sensor system.

The problem with the prior art is that inserting a tube into a medical device such as an infusion device (e.g. an infusion pump and/or an infusion monitoring device or the like) requires great care and specialist knowledge on the part of the user in order to ensure correct function of the device. For example, proper function of the pump or a monitoring mechanism (for example, for monitoring infusion fluid pressure and/or infusion fluid flow and/or air in the infusion tubing) may be impaired if the tubing is not accurately placed and clamped. According to the current state of the art, an infusion tube must be positioned manually in several places, in particular in front of sensors and/or actuators of the infusion device. This is not very reproducible and a lot of technical effort is required to protect against incorrect deposits. Possible errors therefore have a significant impact on the accuracy and safety of infusion therapy.

Further is over EP 3 461 528 A1 a hose clamp is known, which has two mutually pivotable and lockable clamping plates/housing parts.

Summary of the invention

The object underlying the present disclosure is to improve or eliminate disadvantages of the prior art. In particular, a medical device should be provided which enables a particularly high level of accuracy and safety during therapy.

The object on which the disclosure is based is solved by a medical device with the features of claim 1. Advantageous embodiments are the subject of the subclaims and will be described in more detail later.

To be more precise, the object on which the invention is based is achieved by a medical device, in particular an infusion device, for monitoring and/or controlling fluid, in particular infusion medium, flowing through an (infusion) tube. The device has a housing which has a first housing part and a second housing part, which are connected to one another via a hinge portion in order to open and close the housing. Furthermore, the device has at least a first hose holder and a second hose holder for holding the hose, which are spaced apart from one another in a longitudinal direction of the hose. Furthermore, the medical device has at least one first pivot arm, which is pivotally articulated on the first housing part about a first hinge axis, forms the first tube holder at a distance from the first hinge axis and is further articulated and / or guided on the second housing part in such a way that when the housing is closed second housing part presses indirectly or directly against the first pivot arm in order to pivot the first pivot arm and move the first hose holder in the direction of the first housing part.

In other words, a medical device is provided which has a housing with a swivel mechanism (the at least one swivel arm, also called a catch arm), which has dedicated insertion areas with high tolerance when the housing and the swivel mechanism are open. By folding the housing and the swivel mechanism, a tube inserted therein is secured and, if necessary, pressed into associated receptacles in the area of a sensor system and/or manipulation mechanism (clamping lever, peristalsis) of the medical device.

With such a medical device, the tube is inserted and positioned automatically using a special insertion mechanism, in particular the at least one first swivel arm. This significantly reduces the user's influence, so that the number of errors can be reduced. Furthermore, the hose is inserted and positioned without any special requirements for its positioning, i.e. H. with high tolerances for the user. This means the user needs less time when inserting the hose. The insertion mechanism then aligns the tube when the housing is closed and positions it correctly and reproducibly, particularly at relevant points, such as in front of actuators (e.g. a clamping lever/peristalsis) and sensors. This significantly increases the safety and accuracy of therapy, especially infusion therapy. In summary, the medical device according to the disclosure significantly reduces insertion errors, reduces the time required for correctly inserting the tube, increases the reproducibility of the insertion process and enables better coordination of the device components/pump components, thereby increasing the accuracy of (infusion) therapy .

The medical device preferably has actuators and/or sensors which are arranged between the two tube holders. Optionally, these actuators and/or sensors are arranged in associated receptacles for the hose. The medical device can be, for example, a pump, in particular an infusion pump, which controls a fluid flow. Alternatively or additionally, the device can have a monitoring device with various sensors and, if necessary, valves or clamps. The medical device can alternatively be provided as a combined pump and monitoring device. The medical device can be a monitoring and/or control device designed separately from a pump, which can optionally be attached to the outside of the pump. The medical device preferably has a monitoring device and can be attached to a hanging hose (clamping/engaging/by friction). The two housing parts (i.e. the first housing part and the second housing part) are preferably designed like a shell. The joint section is preferably designed like a hinge in order to open and close the two housing parts and thus open or close the housing (i.e. the two housing parts hinged to one another). Alternatively, it is also conceivable to design the joint section as a sliding joint in order to move the two housing parts relative to one another.

The two tube holders (the first and the second tube holder) define the longitudinal direction in which the tube (infusion tube) runs when inserted. For example, the longitudinal direction of the hose is defined by a shape of the hose holders and/or their position relative to one another. The hose holders are provided in particular in or on the housing. The two hose holders are designed to hold or grip the hose. In particular, the hose can be held in the hose holders by a press fit, a clamp, a friction fit or the like. In particular, the hose holders are arranged on opposite sides of the housing in order to determine the position of the hose in the entire housing as well as possible.

The at least one first pivot arm (also referred to as a tentacle) extends from the first hinge axis and can be folded in and out about this first hinge axis relative to the first housing part. Preferably, the first pivot arm extends transversely (obliquely or perpendicularly) to the first hinge axis. The first hose holder is formed in particular at an end of the at least one first pivot arm that is opposite the first hinge axis. As a result, the insertion path of the hose is particularly large and an insertion path/angle can be optimized. The second housing part can be opened immediately when the housing is closed, i.e. H. through a section integrally connected to the second housing part or formed integrally with it, for example a guide rail, a guide link or the like, against which at least one first pivot arm is pressed. In this case, it is particularly advantageous if the at least one first pivot arm is biased into an open position (folded open relative to the first housing part). Alternatively, when the housing is closed, the second housing part can press against the at least one first swivel arm indirectly, for example via a joint rod, a second swivel arm or the like.

The medical device preferably has a second swivel arm, which is pivotally articulated on the second housing part about a second hinge axis and which is pivotally connected to the first swivel arm via a swivel or knee joint at a distance from the second hinge axis, such that the first swivel arm and the second Swivel arm are connected to each other like pliers to form the first hose holder between them.

In other words, the two swivel arms (the first swivel arm and the second swivel arm) lie like an accordion between the two housing parts. This is advantageous because it enables particularly stable guidance of the first swivel arm and reduces the risk of damage to it, for example due to unintentional bending. A high level of stability is particularly advantageous if the medical device is to be attached to a hanging hose, since the material thickness of components of the medical device (e.g. the swivel arms) can then be reduced and a low overall weight can be achieved. Optionally, the two swivel arms can have guide jaws which extend from one side of one swivel arm to the other swivel arm. The guide jaws of the different pivot arms are offset from one another, particularly in the longitudinal direction of the hose, in order to mesh with one another like a comb. This can further increase the stability of the swivel arms when folding. An axis of the swivel or knee joint is in particular parallel to the first and second hinge axes. The swivel or knee joint can, for example, be formed in the manner of a simple hinge or can be formed in that at least one of the pivot arms has a fork-like end which is interlocked/clamps/engages with one end of the other pivot arm. The first and/or second pivot axis is in particular parallel to an axis of the joint section, about which the first and second housing parts rotate relative to one another.

Furthermore, the second swivel arm advantageously automates unfolding/opening of the first swivel arm, since the second swivel arm pulls the first swivel arm into the unfolded position when the housing is opened. In addition, when closing the housing, the hose can be held in the hose holder particularly early (e.g. clamped). In particular, sections of the guide jaws, which are arranged adjacent to the hose holder, can provide a defined narrowing of an opening in the hose holder between the two pivot arms.

The first hinge axis is preferably formed on a side of the first pivot arm facing away from the joint section. Further preferably, the first hose holder is formed on a side of the first pivot arm facing the joint section. It can thereby be achieved that at least the first hose holder can be arranged on a side which is aligned towards the opening of the housing. In the case in which a second swivel arm is provided, the opening of the hose holder is defined in particular by a position of the two swivel arms relative to one another or by a folding angle/opening angle between them. The advantage is that inserting the hose is particularly easy. Preferably, a distance between the joint section and the first or second hinge axis is greater than a distance between the first hose holder and the first or second hinge axis. i.e. the first swivel arm and possibly the second swivel arm can/can be completely accommodated in the housing. Furthermore, particularly when the second swivel arm is provided, the opening angle between the two swivel arms is larger than an opening angle of the housing, which makes inserting the hose particularly easy.

The first hose holder preferably has a cylindrical section-shaped recess formed at least on the first swivel arm and/or on the second swivel arm for receiving the hose. That is, the recess is formed on one side of the first and/or second swivel arm, which faces the opposite housing part or swivel arm. This means that a round, inexpensive standard hose can be used, which is not unnecessarily deformed by the hose holder.

Further preferably, the recess, which forms the hose holder, is formed in the swivel or knee joint and runs parallel or coaxial to a pivot axis of the swivel or knee joint. For example, the two pivot arms can have semicircular, forked ends which interlock coaxially with one another, with an inner surface of the semicircular shape forming the recess. In this way, it is possible to clamp the hose between the two pivot arms in a pliers-like manner right at the beginning of a closing process of the housing. The risk of the hose slipping during closing can thus be minimized.

Further preferably, the first hose holder has a clamping projection, in particular a projection running transversely to the longitudinal direction of the hose, for clamping the hose. This can further improve the hold of the hose in the hose holder. Alternatively or additionally, the first hose holder can have an insert or a coating made of an elastomer (for example silicone, rubber or the like) in order to increase the frictional adhesion of the hose in the hose holder.

Advantageously, at least the first swivel arm (and possibly the second swivel arm) is mounted so that it can move relative to the housing along the first (and possibly second) hinge axis. In other words, the first and/or second swivel arm can be displaced in the longitudinal direction of the hose or transversely to the direction of extension of the respective swivel arm. This makes it possible to change a distance between the first hose holder relative to the second hose holder.

Further preferred is a displacement or a displacement position of at least the first pivot arm in the longitudinal direction of the hose depending on an opening angle of the housing, wherein in an open position of the housing a distance between the first hose holder and the second hose holder is minimal and in a closed position of the housing the distance between the first hose holder and the second hose holder is maximum. In this way, the hose can be tensioned in a defined manner when inserted by the at least one first pivot arm. Furthermore, no force is required from the user to tension the hose themselves. This further increases the accuracy and speed of the insertion process or positioning of the hose in the housing. It is particularly advantageous if a maximum distance between the two hose holders is already reached between a 50% and 80%, more preferably 70% closed state of the housing. This allows the correct position of the hose in the hose holders and, if necessary, relative to the housing (the actuators and/or sensors provided therein) to be visually checked.

It is advantageous if the first housing part and/or the second housing part forms a first ramp section, which is designed to press directly or indirectly against the first swivel arm during a pivoting of the first swivel arm in order to move it along the first hinge axis. The first ramp section can press against the first pivot arm directly (i.e. via direct contact with the first pivot arm) or indirectly (i.e. via a movable component arranged therebetween, such as the second pivot arm). The first ramp section is formed in particular by a surface which extends obliquely to a pivot plane of the first pivot arm (or a corresponding plane/axis of the movable component arranged therebetween) in such a way that the pivot plane of the first pivot arm extends together with the first pivot arm through the first Ramp section is displaced in a longitudinal direction of the hose, in particular is pressed outwards along the length of the hose. In particular, the first ramp section is aligned outwards along the length of the hose. If the second swivel arm is provided, it can be moved along the length of the hose together with the first swivel arm via its coupling to the first swivel arm in the swivel or knee joint.

The first ramp section can be formed, for example, by a projection of the housing, which comes into contact with the first pivot arm and/or with the second pivot arm. More preferably, the first and/or second pivot arm can have an opening which extends through the pivot arm in the pivot plane. In this case, such a projection can engage in the opening of the respective pivot arm. This enables particularly reliable guidance of the respective swivel arm on the first ramp section. Furthermore, the projection can thus easily form a reset ramp, which runs essentially parallel to the first ramp section and is aligned in the opposite direction thereto (in particular towards the inside along the length of the hose). Alternatively, a corresponding reset ramp can also be provided elsewhere on the housing.

The first ramp section can have a uniform gradient. Alternatively, the first ramp section can have a variable pitch, so that the displacement of the first pivot arm in the longitudinal direction of the hose can be precisely controlled. For example, it can be advantageous if the slope is very steep initially (i.e. in an area of the first ramp section, which comes into contact with the first pivot arm or the movable component at the beginning of the closing process of the housing) and later (i.e. in an area of the first ramp section, which comes into contact with the first pivot arm or the movable component in the middle or at the end of the closing process). This means that the hose is only tensioned towards the end of the closing process, when it is already securely held in the hose holder.

Preferably, the first housing part and/or the second housing part forms a stop section, which prevents the movement of the first pivot arm in the longitudinal direction of the hose in a first direction, in particular towards a housing externally, limited. This increases the functional reliability of the medical device according to the disclosure. Particularly preferably, the stop section is arranged along the inside of the first and/or second pivot arm. Ie it can thus limit a movement of the first pivot arm directed inwards along the length of the hose. More preferably, the stop section is formed on the same projection as the first ramp section and is directly adjacent to it in the longitudinal direction of the hose. Alternatively, the stop section can be provided at another area of the housing.

Advantageously, the first housing part and/or the second housing part can form a first securing section, which is designed to come into engagement with the first swivel arm and/or the second swivel arm during closing of the housing in order to prevent the movement of the first swivel arm and / or the second pivot arm in the longitudinal direction of the hose in a second direction, in particular towards an interior of the housing, when the housing is closed. The securing section can, for example, be an undercut in the housing or can be a surface running parallel to the pivoting plane of the respective pivoting arm. Because such a surface or such an undercut supports the corresponding swivel arm, the latter can be relieved in the position in which the hose is elastically stretched. This is therefore a particularly stable embodiment of the medical device according to the disclosure. Furthermore, a reset of the corresponding pivot arm in the longitudinal direction of the hose can be prevented, so that the functional reliability of the medical device is further increased.

The first securing section can preferably be formed on the same projection as the first ramp section and/or the first stop section. In particular, the stop section, the first ramp section and the first securing section can form a continuous link for guiding and securing the first pivot arm. In other words, a first projection can be provided, which has a base connected to the housing, which extends in the direction of the opposite housing section, and forms the first securing section on a lateral flank in a pivoting plane of the first pivoting arm. Adjacent to the base, the first projection can have a tapered section, which forms the first ramp section on one flank, which adjoins the first securing section. Adjacent to the tapered section, the first projection can have a tip which forms the stop section on a lateral flank, which adjoins the ramp section. Alternatively, the securing section may be provided on another section of the housing.

Furthermore, it is preferred if the first ramp section is formed on a first projection of the first housing part and the first securing section or a second securing section is formed on a second projection of the second housing part, such that the first projection and the second projection are in the closed state of the Grab the housing one behind the other. In particular, the first projection and the second projection are offset from one another along the length of the hose. This enables a particularly compact design of the medical device. Adjacent to the second safety section, a second ramp section can optionally be provided, which is designed and arranged to guide the second pivot arm during its displacement in the longitudinal direction of the hose.

Further preferably, at least one biasing element is provided, which applies a restoring force to the first pivot arm indirectly (i.e. via direct contact therewith) or directly (i.e. via a movable component arranged in between, such as the second pivot arm), in order to move it in in the longitudinal direction of the hose against the first ramp section. This is a particularly simple, lightweight and cost-effective solution for providing a reset of the first pivot arm when opening or closing the housing, i.e. against a direction of movement which is achieved by the first ramp section. Alternatively or additionally, the biasing element can bias the first pivot arm in the direction of an unfolded position (relative to the housing). This is particularly advantageous if no second swivel arm is provided and the first swivel arm is guided directly on the second housing. Even if the first and second swivel arms are provided, this is advantageous, for example because play in the first and/or second swivel arm is avoided and a particularly precise positioning of the hose is thus achieved.

The at least one biasing element can preferably be a torsion spring, with a first leg, which is supported on the housing, in particular in a support recess of the housing, and a second leg, which rests or is fastened on the first pivot arm or on the second pivot arm. The support recess preferably forms a support flank to support a free end of the second leg in the longitudinal direction of the hose, and widens towards the first hinge axis or the second hinge axis with respect to a width according to sen in the longitudinal direction of the hose in order to provide a space for pivoting the second leg. A flank of the support recess in its widening section can run obliquely in the direction of the first hinge axis and the first leg, so that in a maximally displaced position of the first pivot arm, the second leg of the torsion spring can rest on this flank and be supported thereby.

Alternatively or in addition to the design described above with a first pivot arm displaceably mounted along the length of the hose, it is conceivable to provide the first pivot axis and optionally the second pivot axis obliquely (or even perpendicularly) to the longitudinal direction of the hose in such a way that the at least one first pivot arm and optionally the second pivot arm extend obliquely (or vertically) away from the other hose holder (i.e. towards the outside of the housing with respect to the longitudinal axis of the hose/towards the outside along the length of the hose). In this way, the first hose holder, which is formed by the first and possibly second swivel arm, is pivoted outwards along the length of the hose when the housing is closed and when the at least first and possibly second swivel arm is folded in. This automatically increases a distance between the first hose holder and the second hose holder in order to tension the hose.

In particular, the first and second housing parts are in contact with one another in the closed state. A first trough is preferably formed on a side of the first housing part which faces the second housing part. A bottom of the first trough lies, in particular, opposite the second housing part. In the first trough, the first swivel arm can be at least partially sunk/accommodated in the closed/folded state. In the first trough (i.e. extending from the bottom of the trough or recessed in it) the first projection with the link (the stop section and / or the first ramp section and / or the first securing section) and / or the first hinge axis and / or or the support recess is formed. The (protruding) components that define the articulation and interaction between the first pivot arm and the first housing section together form a first articulation section.

Preferably, a second trough is formed on one side of the second housing part, which faces the first housing part, in which the second pivot arm is at least partially sunk/accommodated in the closed/folded state. A bottom of the second trough lies, in particular, opposite the first housing part. In the second trough (i.e. extending from the bottom of the trough), the second projection is further preferably formed with a further link (the second ramp section and/or the second securing section) and/or the second hinge axis. The (protruding) components that define the articulation and interaction between the second pivot arm and the second housing section together form a second articulation section.

The second hose holder is advantageously designed to correspond to the first hose holder. I.e. the second hose holder is formed by a further first and a further second pivot arm (and a further first articulation section and a further second articulation section, i.e. the articulation sections), which are designed identically to the first and second pivot arms of the first hose holder and are attached in the same way housing are attached. In particular, the first and second hose holders with their respective first and second hose arms and first and second articulation sections are designed in mirror images with respect to a plane perpendicular to the longitudinal direction of the hose and are arranged on the housing.

Character description

• 1 zeigt ein medizinisches Gerät, insbesondere Infusionsgerät, nach einer bevorzugten Ausführungsform der Offenbarung und veranschaulicht dessen Funktionsweise.
• 2 zeigt das medizinische Gerät gemäß der bevorzugten Ausführungsform in einer perspektivischen Ansicht.
• 3 zeigt eine Seitenansicht des medizinischen Geräts gemäß der bevorzugten Ausführungsform mit einem geöffneten Gehäuse (oben) und einem geschlossenen Gehäuse (unten).
• 4 zeigt einen Ausschnitt des medizinischen Geräts der bevorzugten Ausführungsform im Bereich eines ersten Anlenkabschnitts.
• 5 zeigt einen Ausschnitt eines Gehäuseteils des medizinischen Geräts der bevorzugten Ausführungsform im Bereich des ersten Anlenkabschnitts.
• 6 veranschaulicht eine Einbausituation des ersten Schwenkarms des medizinischen Geräts der bevorzugten Ausführungsform.
• 7 zeigt einen Ausschnitt eines weiteren Gehäuseteils des medizinischen Geräts der bevorzugten Ausführungsform im Bereich eines zweiten Anlenkabschnitts.
• 8 zeigt einen Ausschnitt des medizinischen Geräts der bevorzugten Ausführungsform im Bereich der ersten und zweiten Anlenkabschnitte bei einem geschlossenen Gehäuse im Querschnitt.
• 9 zeigt eine Schlauchhalterung des medizinischen Geräts der bevorzugten Ausführungsform in perspektivischer Ansicht.
• 10 zeigt die Schlauchhalterung des medizinischen Geräts der bevorzugten Ausführungsform mit einem darin eingelegten Infusionsschlauch in einer Seitenansicht.

The present disclosure is described below using preferred embodiments. However, these are only illustrative in nature and are not intended to limit the scope of the present invention. Furthermore, when describing the various embodiments, the same reference numerals are used for the same components in order to avoid redundant descriptions of the same.

• 1 shows a medical device, in particular an infusion device, according to a preferred embodiment of the disclosure and illustrates its functionality.
• 2 shows the medical device according to the preferred embodiment in a perspective view.
• 3 shows a side view of the medical device according to the preferred embodiment with an open housing (top) and a closed housing (bottom).
• 4 shows a section of the medical device of the preferred embodiment in the area of a first articulation section.
• 5 shows a section of a housing part of the medical device of the preferred embodiment Guidance form in the area of the first articulation section.
• 6 illustrates an installation situation of the first pivot arm of the medical device of the preferred embodiment.
• 7 shows a section of a further housing part of the medical device of the preferred embodiment in the area of a second articulation section.
• 8th shows a section of the medical device of the preferred embodiment in the area of the first and second articulation sections with a closed housing in cross section.
• 9 shows a hose holder of the medical device of the preferred embodiment in a perspective view.
• 10 shows the tube holder of the medical device of the preferred embodiment with an infusion tube inserted therein in a side view.

1 shows an infusion device 1 as a medical device according to the disclosure according to a preferred embodiment of the disclosure and illustrates its functionality. The infusion device 1 has a first housing part 2 and a second housing part 3, which are hinged to one another at a joint section 4 (hinge-like in the present example). A through opening 5 is formed in a housing wall by the first housing part 2 and the second housing part 3, into which an infusion tube 6 is to be inserted correctly. In view (A) on the far left 1 the housing 2, 3 is opened and an infusion tube 6 is inserted into the infusion device 1. The infusion tube 6 is inserted into the housing 2, 3 using an insertion aid. A direction in which the infusion tube extends when it is correctly inserted into the infusion device 1 is referred to below as the “longitudinal direction of the tube”.

The insertion aid is described in more detail below. On the first housing part 2, on a side opposite the joint section 4, a first articulation section 7 is provided, on which a first pivot arm 8 is pivotally mounted about a first hinge axis A1. Correspondingly, a second articulation section 9 is provided on the second housing part 3 on a side opposite the joint section 4, on which a second pivot arm 10 is pivotally mounted about a second hinge axis A2. The first pivot arm 8 and the second pivot arm 10 are hinged to one another at their ends opposite the first and second articulation sections 7, 9 via a swivel or knee joint 11. In the area of the knee joint 11, the first swivel arm 8 and the second swivel arm 10 are each curved in the shape of a circular section in order to form a cylindrical section-shaped recess on a side facing the other swivel arm 8 or 10, the diameter of which essentially corresponds to a diameter of the infusion tube 6 to be inserted or something is less than this to provide an interference fit therewith. The recesses formed in this way form a first hose holder 12a and define the longitudinal direction of the hose. As shown in view (A), the two pivot arms 8, 10 are opened/unfolded when the housing 2, 3 is opened/unfolded, and in this state the infusion tube 6 can be inserted into the recess or the first tube holder 12a.

If, as in view (B), in the middle 1 shown and illustrated by an arrow, the housing 2, 3 is closed, the pivot arms 8, 10 are folded/closed between the housing parts 2, 3 like pliers. An opening angle of the first tube holder 12a between the pivot arms 8, 10 is reduced, so that the infusion tube 6 is enclosed in the first tube holder 12a.

After an optional modification, which is only available in 1 is shown, the pivot arms 8, 10 can each form a guide jaw 13 between the articulation sections 7, 9 and the first hose holder 12a, which protrudes essentially triangularly to the opposite pivot arm 8 and 10, respectively. A short side of the triangular shape faces the first hose holder 12a. Due to the optional guide jaws 13, the opening angle of the first hose holder 12a decreases more quickly when the housing 2, 3 is closed than if no guide jaws 13 were present. In the longitudinal direction of the hose, the guide jaws 13 can be arranged offset from one another in order to mesh like a comb when the housing 2, 3 is closed and thereby ensure greater stability of a joint formed by the two pivot arms 8, 10.

View (C) of the 1 shows the housing 2, 3 in the closed state, in which the first housing part 2 and the second housing part 3 essentially rest against one another. As illustrated by arrows in the area of the first tube holder 12a, in this closed state the infusion tube 6 is clamped between the two pivot arms 8, 10 in the first tube holder 12a. A housing wall of the housing 2, 3 is shown in section in order to better illustrate the articulation sections 7, 9.

2 shows the infusion device 1 according to the preferred embodiment in a perspective view in an open position (ie an open state) of the housing 2, 3. It can be seen particularly clearly that in the housing 2, 3 there are two correspondingly designed first and second tube holders 12a , b are provided, which are aligned with one another in the longitudinal direction of the hose and are spaced apart from one another. Each of the hose holders 12a, b is as referred to above 1 described, formed by a pair of a first and a second pivot arm 8, 10, which are each articulated on one side by an articulation section 7, 9 on the first and second housing part 2, 3 and form the knee joint 11 on their other side which they are connected to each other. In the present example, the hose holder 12a, b is formed concentrically in the knee joint 11.

The pivot arms 8, 10 each have a rectangular opening 14, which extends through the associated pivot arm 8, 10 in a direction transverse to the axis of rotation of the knee joint 11. Flanks of the rectangular openings 14 pointing in the longitudinal direction of the tube are essentially flat and perpendicular to the axis of rotation. The four pivot arms 8, 10 are essentially designed to be identical to one another.

In the present illustration, one of the first swivel arms 8 is only shown in dashed lines in order to enable a view of the first articulation section 7 in an area lying behind the first swivel arm 8. This will be referenced later 4 until 8th explained in more detail.

3 shows a side view of the infusion device 1 according to the preferred embodiment with an open housing 2, 3 (top) and a closed housing 2, 3 (bottom). In 3 Dimension lines are inserted adjacent to the pivot arms 8, 10 in order to illustrate a longitudinal movement of the pivot arms 8, 10 along the first and second hinge axes A1, A2 of the articulation sections 7, 9 during the closing of the housing 2, 3.

More precisely, a distance D11 ( 3 top) in the longitudinal direction of the hose between the pairs of pivot arms 8, 10 spaced apart along the hose length in the open state is smaller than a corresponding distance D12 ( 3 bottom) in the closed state of the housing 2, 3. Furthermore, in the open state there is a distance D21 ( 3 above) an outer side in the longitudinal direction of the hose (ie a side facing the outside of the housing along the longitudinal direction of the hose / facing away from the other hose receptacle) of each swivel arm 8, 10 between the respective swivel arm 8, 10 and an outer end of the corresponding articulation sections 7, 9 in the housing 2 , 3 trained. In the closed state, the pivot arms 8, 10 are located further outwards in the longitudinal direction of the hose in relation to the housing 2, 3 / to the pivot arms 8, 10 of the other hose holder 12a, b, so that the distance D21 is a distance of the longitudinal movement of the respective pivot arm 8, 10 is reduced, in particular zero. A mechanism for moving the pivot arms 8, 10 along the respective hinge axes A1, A2 (in the longitudinal direction of the hose) is described in detail below.

4 shows a section of the infusion device of the preferred embodiment in the area of the first articulation section 7. The first pivot arm 8 is shown in section in the area of the opening 14 transversely to an extension direction of the pivot arm 8. The first articulation section 7 forms a first trough 15 in the first housing part 2, in which the first pivot arm 8 can be at least partially retracted in the closed state. Furthermore, the first articulation section 7 forms a projection 16 within the first trough 15, which is spaced from the first hinge axis A1 in the direction of the joint section and which extends perpendicularly from the trough floor in order to engage in the opening 14 of the first pivot arm 8. The projection 16 forms a link on an outer side in the longitudinal direction of the hose, which is in contact with the first pivot arm 8 and serves to move, guide and secure it in the longitudinal direction of the hose.

In detail, the projection 16 has a base on its lower section, which is directly adjacent to the trough 15 in the first housing part 2. In the area of the base, the link forms a first securing section 17, which runs essentially perpendicular to the longitudinal direction of the hose. When the housing 2, 3 is closed, one of the flanks of the opening 14 of the first pivot arm 8 and the first securing section 17 come into contact with one another. As a result, the first pivot arm 8 cannot move back towards the interior of the housing. Adjacent to the base, the projection 16 forms a tapering section, the outer side surface of which runs obliquely to the longitudinal direction of the hose in the longitudinal direction of the hose. This side surface is part of the backdrop and forms a ramp section 18.

In 4 can be seen how the first pivot arm 8 rests against the ramp section 18 with a rounded edge of the opening 14. If the housing 2, 3 is closed further starting from the position shown, the first pivot arm 8 is pressed in the direction of the first housing part 2 and becomes a ramp section due to the contact 18 shifted outwards along the length of the hose, as indicated by an arrow P1. If, on the other hand, the housing 2, 3 is opened further from the position shown, the first pivot arm 8 is pulled upwards, away from the first housing part 2. The first pivot arm 8 moves inwards along the length of the hose along the ramp section 18, for example due to a preload applied to it, until it comes into contact with a stop section 19 of the guide link, as indicated by a second arrow P2. The stop section 19 of the guide link is formed on an outer side surface of a tip of the projection 16 along the length of the hose, which immediately adjoins the ramp section 18. The stop section is formed by a flat surface that runs perpendicular to the first hinge axis A1. The tip of the projection is immediately adjacent to the tapered portion of the projection 16.

5 shows a section of the first housing part 2 of the infusion device 1 of the preferred embodiment in the area of the first articulation section 7 and 6 shows an installation situation of the first swivel arm 8 in this first articulation section 7. In 6 the first swivel arm 8 is shown in dashed lines to allow a view behind it. In the area of the first hinge axis A1, the first pivot arm 8 is forked and forms two tines, between which a biasing element 20 in the form of a torsion spring is provided coaxially to the first hinge axis A1 (see also 2 ). A first leg 21 of the torsion spring/biasing element 20 is attached or supported on the first pivot arm 8. A second leg 22 of the torsion spring/biasing element 22 is supported on the first housing part 2, as referred to 5 described in more detail. The biasing element 20 biases the first pivot arm 8 into an open/folded-up position with respect to the first housing part 2.

Furthermore, the biasing element 20 tensions the first pivot arm 8 in the longitudinal direction of the hose (into an inner position along the length of the hose, as with reference to 3 described) in order to press the swivel arm 8 against the backdrop of the projection 16. More precisely, the second leg 22 of the prestressing element 20 lies in a support recess 23 in the bottom of the first trough 15 of the first articulation section 7. As particularly in 5 clearly visible, the first trough 15 has an end region 24 which is opposite the first hinge axis A1. The end region 24 is narrow and rectangular. Starting from the end region 24 in the direction of the first hinge axis A1, the first trough 15 widens outwards along the length of the hose. The second leg 22 of the prestressing element 20 thus has space to allow the prestressing element 20 to bend/pivot the second leg 22 about an axis perpendicular to the first hinge axis A1 in the event of a longitudinal load. An outer surface of the first trough 15 along the length of the hose forms a contact surface for the second leg 22 of the biasing element 20.

7 shows a section of a second housing part 3 of the infusion device 1 of the preferred embodiment in the area of the second articulation section 9. This forms a second trough 25, in which the second pivot arm 10 can be at least partially retracted in the closed/folded state. The second trough 25 extends from a region of the second hinge axis A2 (in 7 shown: a hinge eye) in the direction of the joint section 4. The second projection 26 forms a second link on its outer flank along the length of the hose, which is designed and arranged to, in the closed state of the housing 2, 3, with one of the flanks of the opening 14 of the second Swivel arm 10 comes into operation. The second link has a second securing section 27, which is formed on a second base of the second projection 26. The second link runs in the area of the second securing section 27 essentially perpendicular to the longitudinal direction of the hose. Adjacent to the second securing section 27, the second link has a second ramp section 28, which extends from the second securing section 27 away from the corresponding trough floor and is beveled inwards along the length of the hose.

A state in which the housing 2, 3 is closed, the first and second projections 16, 26 engage in the openings 14 of the first and second pivot arms 8, 10 and the first and second securing sections 17, 27 each with flanks of these openings 14 are in the system, is in 8th shown in a sectional view.

As in 7 and 8th As can be seen, the second projection 26 is chamfered on an inner side along the tube in order to avoid a collision with the first projection 16 in the closed state of the housing 2, 3. Furthermore, a second trough 25 is formed along the inside of the hose adjacent to the second projection 26 and extending in the direction towards the second hinge axis A2. The second trough 2 lies essentially opposite the tip of the first projection, as in 8th is clearly visible.

9 shows a first or second tube holder 12a, b of the infusion device 1 of the preferred embodiment in a perspective view. The first swivel arm 8 and the second swivel arm 10 each form ends in the shape of a section of a circle, which interlock like a comb to form the knee joint 11. An inside of the circular segment-shaped ends forms the first or second tube holder 12a, b, into which the infusion tube 6 can be inserted. Inwardly projecting projections 29 are also provided in a surface of the first or second tube holder 12a, b, which are intended for local clamping/crushing of the infusion tube 6 (ie whose inner diameter is smaller than an inner diameter of the respective tube holder 12a, b). This is also out 10 clearly visible, which shows the first or second tube holder 12a, b with an inserted infusion tube 6 in a side view.

Reference character list

1

Medical device/infusion device

2

First housing part

3

Second housing part

4

Joint section

5

Passage opening

6

Tube/infusion tube

7

First articulation section

8th

First swing arm

9

Second articulation section

10

Second swivel arm

11

Knee joint

12a, b

Hose holder/cylinder section-shaped recess

13

Guide jaws

14

openings

15

First hollow

16

First lead

17

First backup section

18

First ramp section

19

stop section

20

Preload element/torsion spring

21

First leg

22

Second leg

23

Support recess

24

End area (trough)

25

Second hollow

26

Second lead

27

Second backup section

28

Second ramp section

29

Projections

A1, A2

First or second hinge axis

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CN 2533866 Y [0003]
• EP 3461528 A1 [0005]

Claims (15)

Medical device (1), in particular an infusion device for monitoring and/or controlling fluid flowing through a hose (6), with a housing which has a first housing part (2) and a second housing part (3), which have a joint section (4 ) are connected to one another in order to open and close the housing and at least a first hose holder (12a) and a second hose holder (12b) for holding the hose (6), which are spaced apart from one another in a longitudinal direction of the hose, characterized by at least one first pivot arm (8), which is pivotally articulated on the first housing part (2) about a first hinge axis (A1), forms the first hose holder (12a) at a distance from the first hinge axis (A1) and is further articulated in this way on the second housing part (3) and/or is guided so that when the housing is closed, the second housing part (3) presses directly or indirectly against the first swivel arm (8) in order to swivel the first swivel arm (8) and the first hose holder (12a) in the direction of the first housing part (2). to move. Medical device (1) according to Claim 1 , further with a second pivot arm (10), which is pivotally articulated on the second housing part (3) about a second hinge axis (A2) and which is spaced apart from the second hinge axis (A2) via a swivel or knee joint (11) and pivotable with the first Swivel arm (8) is connected in such a way that the first swivel arm (8) and the second swivel arm (10) are connected to one another like pliers in order to form the first hose holder (12a) between them. Medical device (1) according to Claim 2 , wherein the first hinge axis (A1) is formed on a side of the first pivot arm (8) facing away from the joint section (4) and the first hose holder (12a) is formed on a side of the first pivot arm (8) facing the joint section (4). Medical device (1) according to Claim 2 or 3 , wherein the first hose holder (12a) has a cylindrical section-shaped recess formed at least on the first pivot arm (8) and/or on the second pivot arm (10) for receiving the hose (6). Medical device (1) according to Claim 4 , wherein the recess is formed in the swivel or knee joint (11) and runs parallel or coaxial to a pivot axis of the swivel or knee joint (4). Medical device (1) according to one of the preceding claims, wherein the first tube holder (12a) has a clamping projection (29), in particular a projection running transversely to the longitudinal direction of the tube, for clamping the tube (6). Medical device (1) according to one of the preceding claims, wherein at least the first pivot arm (8) is mounted so as to be displaceable relative to the housing along the first hinge axis (A1). Medical device (1) according to Claim 7 , wherein a displacement of at least the first pivot arm (8) in the longitudinal direction of the hose is dependent on an opening angle of the housing, wherein in an open position of the housing a distance between the first hose holder (12a) and the second hose holder (12b) is minimal and in a closed position of the housing the distance between the first hose holder (12a) and the second hose holder (12b) is maximum. Medical device (1) according to Claim 7 or 8th , wherein the first housing part (2) and / or the second housing part (3) forms a first ramp section (18), which is designed to move directly or indirectly against the first swivel arm (8) during a pivoting of the first swivel arm (8). Press to move it along the first hinge axis (A1). Medical device (1) according to Claim 9 , wherein the first housing part (2) and / or the second housing part (3) forms a stop section (19), which limits the movement of the first pivot arm (8) in the longitudinal direction of the hose in a first direction, in particular towards the outside of the housing. Medical device (1) according to one of the preceding claims, wherein the first housing part (2) and/or the second housing part (3) forms a first securing section (17), which is designed to be closed during closing of the housing with the first pivot arm ( 8) and/or the second pivot arm (10) to come into engagement in order to limit the movement of the first pivot arm (8) and/or second pivot arm (10) in the longitudinal direction of the hose in a second direction, in particular towards an interior of the housing, if the housing is closed. Medical device according to one of the Claims 9 until 11 , wherein the first ramp section (18) is formed on a first projection (16) of the first housing part (2), the first securing section (17) or a second securing section (27) on a second front jump (26) of the second housing part (3) is formed and the first projection (16) and the second projection (26) engage one behind the other in the closed state of the housing. Medical device (1) according to one of the preceding claims, wherein at least one biasing element (20) is provided, which acts directly or indirectly on the first pivot arm (8) in order to move it in the longitudinal direction of the tube against the first ramp section (18) and/or in To bias towards an unfolded position. Medical device (1) according to Claim 10 , wherein the at least one biasing element (20) is a torsion spring with a first leg (21), which is received in a support recess (23) of the housing in order to be supported on the housing, and a second leg (22), which is on the first pivot arm (8) or rests or is attached to the second pivot arm (10), and wherein the support recess (23) forms a support flank to support a free end of the second leg (22) in the longitudinal direction of the hose, and to the first hinge axis (A1) or widened towards the second hinge axis (A2) in order to provide space for pivoting the second leg (22). Medical device (1) according to one of the preceding claims, wherein the second tube holder (12b) is designed corresponding to the first tube holder (12a).

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