Fastening heating and / or temperature measuring device in and / or on medical device

Abstract

The invention relates to a fastening device (1) for a medical device, comprising: a receiving element (8) which can be fastened to a fastening section of the medical device; an insertion element (6) insertable into the receiving element (8), the insertion element comprising a heating and / or temperature measuring device (2, 4) for heating and / or measuring the temperature of a liquid and / or gas in a liquid chamber (30) of the medical device; a connecting element (10) for connecting the insertion element (6) to the receiving element (8), the connecting element (10) comprising a movable part (12) which can be moved relative to the receiving element (8) and / or the insertion element (6) between a locked position and an unlocked position, the movable part (12) is configured to lock the insertion element (6) inserted into the receiving element (8) in a locking position in such a way that the insertion element (6) cannot be removed from the receiving element (8) and to release in an unlocking position in such a way that the insertion element (6) can be removed.

Description

Technical Field

[0001] The present invention relates to a fixing device for fixing a heating and / or temperature measuring device in and / or on a medical device. In addition, the present invention also relates to a medical device equipped with such a fixing device. Background Art

[0002] Medical devices in the form of respiratory therapy devices can be used to treat sleep-related breathing disorders or other problems with the respiratory pump. The patient is connected to the respiratory therapy device via a suitable patient interface (e.g. in the form of a face mask or nasal mask) and patient tubing. In order to reduce the risk of lung infections or damage to lung tissue, it may be necessary to condition the respiratory gases supplied to the patient in an appropriate manner. Respiratory gas conditioning usually means preparing the respiratory gases by heating and / or purifying them, which is particularly important for sensitive patients with previously damaged lungs. For this purpose, active respiratory gas humidifiers (e.g. nebulizers, vaporizers or bubblers) or passive respiratory gas humidifiers (also called heat and moisture exchangers or HMEs for short) can be used.

[0003] A respiratory gas humidifier may include a liquid chamber filled with heated and / or purified water, through which the respiratory gas is passed, thereby being heated or humidified. The liquid chamber may have an (internal) heating device for heating the water, such as a heating rod, and / or a temperature measuring device for measuring the temperature of the liquid, such as a dip tube. External heating devices may also be used.

[0004] Such a heating and / or temperature measuring device can be fastened to the liquid chamber, for example, by means of a screw connection.

[0005] Humidifiers should be cleaned regularly, as bacteria and fungi can grow in the hot water in the liquid chamber. For regular and thorough cleaning of the liquid chamber and / or the heating and / or temperature measuring device, the corresponding components should preferably be removable by the user so that they can be cleaned individually, in particular the respective threaded sections.

[0006] Tightening a heating and / or temperature measuring device to a watertight screw connection, or loosening it, often requires two hands. Furthermore, some users have difficulty determining the correct torque when tightening. If the torque is too low, water could leak from the fluid chamber due to a leak in the screw connection. Excessive torque can damage components, particularly plastic parts or threads. Many respiratory patients are frail and / or suffer from other medical conditions such as gout, arthritis, or rheumatism. Patients with limited mobility face particular difficulties assembling or disassembling these screw-tight heating and / or temperature measuring devices. Summary of the Invention

[0007] One object of the present invention is to provide a fastening device which, compared to screw-on variants, allows for easier assembly and disassembly of a heating and / or temperature measuring device. Another object of the present invention is to provide a corresponding medical device.

[0008] These objects are achieved by the subject matter of the independent claims. Advantageous embodiments of the invention are listed in the dependent claims, the following description and the drawings.

[0009] A first aspect of the present invention relates to a fixing device for a medical device, in particular a respiratory gas humidifier. The fixing device comprises: a receiving element that can be fixed to a fixing section of the medical device; an insert element that can be inserted into the receiving element, the insert element comprising a heating and / or temperature measuring device for heating and / or measuring the temperature of a liquid and / or gas in a liquid chamber of the medical device; and a connecting element for connecting the insert element to the receiving element, wherein the connecting element comprises a component that is movable relative to the receiving element and / or the insert element between a locked position and an unlocked position. The movable component is configured to lock the insert element in the receiving element in the locked position, thereby preventing the insert element from being removed (or falling out) from the receiving element, and to release the insert element in the unlocked position, thereby enabling removal.

[0010] Such a fastening device also enables patients with limited mobility to easily and freely assemble or disassemble the heating and / or temperature measuring device, for example for cleaning purposes, without causing damage or leaks, as is often the case with screw-on variants.

[0011] The movable part can be designed to establish a positive and / or non-positive connection between the receiving element and the insertion element inserted into the receiving element in the locked position and to release the positive and / or non-positive connection in the unlocked position. The positive and / or non-positive connection is designed such that the insertion element cannot be manually removed from the receiving element (using normal force).

[0012] The movable part is mounted movably on the receiving element and / or on the insertion element and / or on another section of the fixation device and / or on the medical device between a locked and an unlocked position.

[0013] Between the locked position and the unlocked position, the movable part may rotate and / or slide relative to the receiving element and / or the insertion element and / or follow a linear and / or curved path when moving between the locked position and the unlocked position.

[0014] For example, the movable component may be fixedly connected to the insertion element and movable, for example, rotatably and / or displaceably (slidably), together with the insertion element, relative to the receiving element between a locked position and an unlocked position. Alternatively, the movable component may be fixedly connected to the receiving element and movable, for example, rotatably and / or displaceably (slidably), together with the receiving element, relative to the insertion element between a locked position and an unlocked position.

[0015] The movable part may be configured to frame the insertion element which is at least partially inserted into the receiving element.

[0016] For example, the receiving element can be designed as a part of the outer housing of the liquid chamber and / or can be fastened as a fastening section to a section of the liquid chamber (outer housing).

[0017] For example, when the liquid level in the liquid chamber is low, heating or temperature measurement of the gas by the heating and / or temperature measuring device may be crucial. It is also conceivable that at least one portion of the heating and / or temperature measuring device used for heating and / or measuring protrudes into another section of the respective medical device, where this portion is not in contact with the liquid (or at least not completely in contact with the liquid) but is in contact with the gas (e.g., ambient air), so that in this case the gas can be additionally or alternatively heated and / or its temperature can be measured.

[0018] A second aspect of the present invention relates to a medical device, in particular a respiratory gas humidifier, comprising a liquid chamber, a fastening section and a fastening device as described above and below, the receiving element of which is fastened to the fastening section of the medical device.

[0019] The receiving element fastened to the fastening section can be oriented relative to the opening of the liquid chamber outer housing such that the heating and / or temperature measuring device can project through the opening into the interior of the liquid chamber when the insert element is fully inserted into the receiving element.

[0020] Furthermore, the medical apparatus may further include a humidifying device configured to humidify the respiratory gas using the liquid in the liquid chamber and provide the humidified respiratory gas to the interface of the breathing tube.

[0021] For example, the liquid chamber may be a water container and / or have a capacity between 100 ml and 1000 ml, 600 ml and 800 ml, or 300 ml and 400 ml.

[0022] The medical device may be a respiratory gas humidifier, a ventilator (in particular a CPAP and / or high-flow respiratory therapy device) or a device for clearing secretions.

[0023] The medical device may further comprise at least one of the following components: a measuring probe for measuring the flow and / or temperature of respiratory gas; a hose system for conducting respiratory gas to and / or away from the patient; a hose heater for heating one or more hoses in the hose system.

[0024] Various embodiments of the present invention are described below. These embodiments should not be construed as limiting the scope of the present invention.

[0025] According to one embodiment, the movable part is movable between a locked position and an unlocked position and / or is rotatable about a rotation axis (e.g. about the longitudinal axis of the insertion element) through an angle of rotation of at most 360°, at most 180°, at most 120°, or preferably at most 90°. In other words, the movement of the movable part between the locked and unlocked positions can be a pure translation, a pure rotation, or a combination of translation and rotation. In this case, the rotation can be limited to a specific maximum rotation angle, e.g. at most 360°, at most 180°, at most 120°, or preferably at most 90°. This can simplify the handling of the movable part, for example, compared to embodiments with screw connections, which usually require more than one rotation to tighten.

[0026] During insertion, the (e.g. elongated) insertion element can only be moved in a direction parallel to its longitudinal axis. In other words, the insertion element can be inserted (rather than tightened) without changing its angular position or its rotation angle relative to the longitudinal axis as the rotation axis.

[0027] According to one embodiment, the insert element can be inserted into the receiving element until it reaches a sealing position and, in this sealing position, is connected to the receiving element in a liquid-tight manner. For example, the gap between the insert element and the receiving element is sealed, preventing liquid and / or gas from leaking from the liquid chamber to the outside through the gap. In this case, the movable component can be configured to lock the insert element in the sealing position in a locked position and / or unlock it in an unlocked position. For example, the fixing device can be configured to press the insert element toward the receiving element in the sealing position with a force required for sealing, such as acting along the longitudinal axis of the insert element.

[0028] According to one embodiment, the fixing device can be configured such that when the insert element is inserted into the sealing position, the insert element and / or the movable part does not need to be rotated more than 360°, 180°, 120°, or preferably more than 90° about the rotation axis relative to the receiving element. The insert element can also be inserted into the sealing position by simply pushing it in.

[0029] Alternatively, the fixing device can also be configured such that when the insert element is rotated about the rotation axis, the receiving element rotates at least partially together with the insert element.

[0030] The tightness of a screw connection depends primarily on the torque used to tighten the screw connection. This embodiment has the advantage that neither large rotational movements nor large torques are required to achieve a fluid-tight connection. This can significantly simplify assembly and / or make the fastening device more robust against assembly errors.

[0031] According to one embodiment, the fixing device may further include a sealing element and be configured such that when the insertion element is inserted into the sealing position, the sealing element is pressed on the one hand by the insertion element and / or the connecting element and / or the movable part, and on the other hand by the receiving element, so that the insertion element is connected to the receiving element in a fluid-tight manner.

[0032] In other words, the sealing element can be configured to close the gap between the insertion element and the receiving element and / or the gap between the connecting element and the receiving element and / or the gap between the movable part and the receiving element in a fluid-tight manner in a compressed state, so that when the insertion element is in the sealing position, no liquid (or gas) or liquid (or gas) worth mentioning can flow out of the fixing device.

[0033] According to one embodiment, the movable element can be configured to exert a force on the male and / or female elements in the direction of the sealing position in the locked position. This can further enhance the sealing effect. For example, the force can be used to compress the sealing element with a defined pressure, thereby ensuring a fluid-tight connection even with significant dimensional and / or shape deviations due to production, assembly, or temperature.

[0034] According to one embodiment, the insertion element inserted into the sealing position may rest against at least one stop. The stop is configured to prevent the insertion element from being inserted further beyond the sealing position. This prevents leakage and / or damage caused by excessive insertion.

[0035] According to one embodiment, the movable part is resiliently constructed and / or resiliently supported, for example, on the insertion element and / or the receiving element, so that in the unlocked position it is subjected to a restoring force acting in the direction of the locked position. This has the effect that the movable part automatically returns to the locked position unless otherwise prevented. This further simplifies assembly and disassembly. For example, the movable part can be resiliently supported by a separate spring element. Additionally or alternatively, the movable part itself can be designed to elastically deform in a suitable manner, thereby achieving resilient support.

[0036] According to one embodiment, the heating and / or temperature measuring device may include at least one of the following components: a (e.g., electric) heating element for heating the liquid and / or gas; a temperature sensor for measuring the temperature of the liquid and / or gas. Furthermore, the heating and / or temperature measuring device may also include at least one of the following components: an electrical contact element for electrically conductively contacting the (e.g., electric) heating element and / or temperature sensor; a sealing element (e.g., the sealing element described above) for sealing a gap between the receiving element and an insertion element inserted into the receiving element; and a blocking element for determining a maximum insertion depth of the insertion element into the receiving element.

[0037] As part of the insertion element, a blocking element can prevent the user from pushing the insertion element too far into the receiving element. For example, the blocking element can be configured as a protruding section on the insertion element that can segment or completely surround the insertion element. Corresponding to the blocking element, the fixing device in the receiving element can also additionally include at least one protrusion to block the blocking element during insertion, preventing further insertion. For example, this protrusion can be in the form of a protruding ring and / or include at least one raised portion. For example, the blocking element can be the stopper described above.

[0038] The heating element can be configured to convert electrical current into heat in a controlled manner and transfer the heat to the liquid and / or gas in the liquid chamber, so as to achieve a temperature of the liquid and / or gas of, for example, 20° to 80°. Furthermore, the heating element can be connected to a temperature sensor for measuring the actual temperature in the liquid chamber and / or the heating element can be automatically deactivated by a safety circuit if the heating element temperature is found to be too high, for example due to the absence of liquid or too little liquid or the absence of gas or too little gas in the liquid chamber.

[0039] For example, the sealing element can be made of at least one of the following sealing materials: ethylene propylene diene rubber, chloroprene rubber, natural rubber, ethylene vinyl acetate rubber, styrene butadiene rubber, acrylonitrile butadiene rubber, polyurethane rubber, polytetrafluoroethylene, silicone, silicone foam, or a fiber-containing elastomer. The sealing element can be, for example, a sealing ring. In this case, the heating and / or temperature measuring device can include an annular constriction to accommodate the sealing ring. For example, the constriction can be configured as a shaped material groove in the insert element. The sealing element can also be a sealing block.

[0040] When the insertion element is (completely) inserted into the receiving element, at least one part of the heating and / or temperature measuring device, for example at least one section of the electrical contact element, can be located outside the liquid chamber.

[0041] According to one embodiment, at least two components, or all components, of the heating and / or temperature measuring device can be arranged one behind the other along its longitudinal axis. The heating and / or temperature measuring device can be elongated, for example, rod-shaped. For example, the sealing element can be arranged between the heating element and the barrier element, and / or between the temperature sensor and the barrier element, and / or between the barrier element and the electrical contact element.

[0042] According to one embodiment, the receiving element may have at least one protrusion, and when the inserting element is inserted into the receiving element, the protrusion is configured to abut against the blocking element, thereby preventing further insertion of the inserting element.

[0043] According to one embodiment, the receiving element can be configured as a channel, particularly a cylindrical channel, comprising an insertion side, a boundary side, a sheath, and an inner wall. In this case, the protrusion can be located on the boundary side and / or the inner wall. For example, a "sheath" can be understood to mean an element that wraps around at least a portion of a longitudinal section of the channel in the circumferential direction of the channel. For example, the sheath can completely wrap around the longitudinal section in the circumferential direction of the longitudinal section and / or have a ring-shaped, shell-shaped, and / or collar-shaped design. For example, an "inner wall" can be understood to mean at least one section of the inner surface of the channel. For example, the channel can have the same or similar cross-section as the insertion element.

[0044] For example, the two cross-sectional shapes can be complementary, and / or the inner diameter of the channel (inner surface) can be slightly larger than the outer diameter of the insert element (outer surface), thereby allowing the insert element to be inserted into the receiving element with no clearance or with a specified amount of clearance. The insert element can be inserted into the receiving element from the insertion side. The boundary side can be opposite to the insertion side, for example, when viewed in the direction of the central axis or longitudinal axis of the channel.

[0045] According to one embodiment, the connecting element, in particular the movable part, may include at least one engaging element, for example in the form of a bump or hook, for engaging the insertion element with the receiving element. For example, the engaging element may be configured to engage the insertion element with the receiving element when the movable part moves into the locked position, and / or to release the engagement of the insertion element with the receiving element when the movable part moves into the unlocked position. The engaging element may be arranged between the insertion side and the boundary side and / or between the insertion side and the protrusion. In addition, when the insertion element is not inserted, the engaging element may form an outlet protruding from the inner wall into the channel and thus may be configured so that when the insertion element is inserted into the receiving element, pressure is applied to the outlet by the insertion element and / or by manually (e.g., with a finger) manipulating the pressure element, pressing it into the sheath so that the outlet no longer protrudes into the channel. For example, the state in which the engaging element is received in the sheath may correspond to the unlocked position. In contrast, in the locked position, the engaging element may engage with the insertion element in a form-fitting manner and / or hook onto the insertion element.

[0046] The pressure element can constitute a connecting element, in particular a movable part, together with the engagement element. For example, during insertion of the insertion element, the user can manipulate the pressure element that is connected to the engagement element.

[0047] According to one embodiment, the insertion element may further include a holding section for gripping the insertion element with one hand, and / or the connecting element (e.g., a movable part) may further include a holding section for gripping the connecting element or the movable part with one hand. The holding section may be configured such that when the insertion element is inserted into the receiving element (e.g., until the sealing position), it is at least partially located outside the receiving element. For example, the holding section may be positioned adjacent to the electrical contact element along the longitudinal axis of the heating and / or temperature measuring device and / or the insertion element and / or between the electrical contact element and the blocking element. The user should be able to grip the insertion element and / or the connecting element (e.g., the movable part) safely in this holding section without coming into contact with the heating and / or temperature measuring device. Furthermore, the movable part may at least partially surround the holding section of the insertion element and be configured such that the user can also grip the movable part safely.

[0048] According to one embodiment, the holding section may include: an annular base body for being pushed onto an insertion element (e.g., a heating and / or temperature measuring device); holding arms extending radially from the base body for moving (e.g., rotating and / or displacing) the base body relative to the insertion element (and / or receiving element).

[0049] For example, the retaining arm can have a flat gripping element at its free end for gripping the retaining arm with the thumb and index finger. In other words, the gripping arm can be configured in the shape of a flag, etc. The connecting part and / or the movable part can be at least partially composed of the base body. Appropriate warnings and / or operating instructions can be provided on the gripping part and / or at the gripping part and / or on the gripping arm and / or the flat gripping element and / or at the gripping arm and / or the flat gripping element. This retaining section forms a particularly long lever arm for locking or unlocking the insertion element and / or for pressing the sealing element. In addition, this retaining section can also serve as a particularly easy-to-read and clear position indicator of the locked or unlocked position. This can further improve operating comfort.

[0050] Furthermore, the retaining section can be movable relative to the insertion element and / or the receiving element between a blocking position and a release position and can be configured to block mechanical coupling of a medical device (e.g., a ventilator) and another device (e.g., a humidifier) ​​in the blocking position, while enabling coupling in the release position. The release position can correspond to a locked position and / or the blocking position to an unlocked position. In other words, the retaining section can be configured so that mechanical coupling is only possible when the insertion element is locked.

[0051] According to one embodiment, the fixing device can be configured to perform a wet insertion movement, a sealing movement, and a closing movement to connect the insert element to the receiving element via the connecting element. The insertion movement can be used to insert the insert element into the receiving element, the sealing movement can be used to connect the insert element and the receiving element in a fluid-tight manner, and the closing movement can be used to lock the insert element in the receiving element. The closing movement can also include relative movement of the movable component relative to the insert element and the receiving element.

[0052] According to one embodiment, the insertion movement can be performed at least partially in a direction parallel to the longitudinal axis of the heating and / or temperature measuring device and / or the insertion element.

[0053] According to one embodiment, the sealing can be performed by the insertion movement.

[0054] According to one embodiment, the sealing can be performed decoupled from the closing movement.

[0055] According to one embodiment, the closing movement can be performed at least partially in a direction obliquely or transversely to the longitudinal axis of the heating and / or temperature measuring device and / or the insert element.

[0056] According to one embodiment, the closing movement can include a rotation of the movable part relative to the insertion element and / or the receiving element about the longitudinal axis of the heating and / or temperature measuring device and / or the insertion element, through an angle of rotation of between 30° and 180°, preferably between 45° and 120°, particularly preferably between 80° and 100° or between 60° and 100°. The closing movement can be performed along a straight and / or curved path.

[0057] The sealing can be achieved, for example, solely by an insertion movement along the longitudinal axis. Thus, a fluid-tight connection between the insert element and the receiving element can be achieved by inserting the insert element (up to the stop in the axial end position) into the receiving element and applying an axial force to the sealing element during the insertion process. Consequently, no additional (axial) force is required for sealing. The closing movement can be performed after sealing. In particular, the gap between the receiving element and the insert element in its axial end position can be sealed independently of the rotation of the insert element about its longitudinal axis.

[0058] According to one embodiment, the fixing device may further include a bayonet lock for locking the inserting element to the receiving element, in particular in a locked position. The bayonet lock may include (at least) one male element and (at least) one female element complementary to the male element as parts of the bayonet lock. The connecting element, in particular the movable part, may comprise the first part of the bayonet lock. Additionally or alternatively, the receiving element may also be the second part of the bayonet lock.

[0059] To lock the bayonet latch, the male element is moved relative to the female element (which engages the female element) from an unlocked position to a locked position, with the male element following the path of the female element. This movement typically requires much less force than the turning force required to tighten a screw.

[0060] For example, the female element may consist of at least one groove and / or the male element may consist of at least one knob. The term "knob" is generally understood to mean a protrusion, particularly a circular protrusion. When viewed longitudinally, the groove may extend helically in the direction of the protrusion, for example, similar to the grooves of a thread with a fixed pitch. This groove or grooves may form an angle of 90° or less, preferably 45° or less, with the plane of the insertion side. For example, the female element may be arranged on the insertion side of the channel.

[0061] According to one embodiment, the connecting element, in particular the movable part, can be configured as a coupling element or a locking element. The locking element can include a locking sleeve and a first part of a bayonet closure. The locking sleeve is attached to the insert element and can be rotated and / or moved relative to the insert element, with the locking sleeve forming a gripping element. This prevents undesirable relative movement of the (pressed) sealing element relative to the heating and / or temperature measuring device. Under certain circumstances, such relative movement can lead to slippage or excessive wear of the sealing element, thus causing leakage. In particular, the locking sleeve can be rotatably and / or slidably supported between a locked and unlocked position and / or on the insert element.

[0062] For example, the locking sleeve may have two buttons on opposite sides, acting as male elements of the bayonet closure.

[0063] According to one embodiment, the locking sleeve can be mounted on the holding section, in particular in such a way that, when the insert element is (e.g., completely) inserted into the receiving element, the locking sleeve is at least partially located outside the receiving element. The locking sleeve can be mounted on the insert element so as to be rotatable and / or displaceable relative to the holding section.

[0064] According to one embodiment, the locking element can be mounted so as to be movable relative to the retaining section along the longitudinal axis of the heating and / or temperature measuring device and / or the insert element. In this case, at least one retaining element can be formed on the side of the locking element facing the retaining section to limit the path of the locking element when it is displaced along at least one direction of the longitudinal axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] The embodiments of the present invention will be described below with reference to the accompanying drawings. Neither the description nor the drawings should be construed as limiting the scope of the present invention.

[0066] Figure 1 A fixing device according to one embodiment of the present invention is shown.

[0067] Figure 2 A fixing device according to another embodiment of the present invention is shown.

[0068] Figure 3 A receiving element of a fixing device according to one embodiment of the present invention is shown.

[0069] Figure 4 An insert element of a fixing device according to one embodiment of the present invention is shown.

[0070] Figure 5 A receiving element of a fixing device according to another embodiment of the present invention is shown.

[0071] Figure 6 An insert element of a fixing device according to another embodiment of the present invention is shown.

[0072] Figure 7 Show Figure 5 Cross section of the receiving element.

[0073] The figures are purely schematic and not drawn to scale. If the same reference numerals are used in different figures, these reference numerals denote the same features or features having the same effect. DETAILED DESCRIPTION

[0074] Figure 1 A fixing device 1 for a heating device 2 in a medical device (not shown here) is shown. The fixing device 1 comprises an insert element 6, a receiving element 8, and a connecting element 10 for connecting the insert element 6 and the receiving element 8. The receiving element 8 is designed as part of an outer housing 28 of a liquid chamber 30, wherein the liquid chamber 30 is designed as a humidifier for a respiratory therapy device (not shown here). In the illustrated variant, the insert element 6 comprises a heating device 2, which in turn comprises a heating element 14 and an electrical contact element 20. The receiving element 8 is designed so that it can at least partially receive the insert element 6, wherein the heating device 2 itself and the electrical contact element 20 are located outside the receiving element 8. The connecting element 10 has a component 12 that is movable relative to the insert element 6 and the receiving element 8 and that at least partially frames the insert element 6 in the inserted state.

[0075] Figure 2Another embodiment of a fastening device 1 is shown. To better illustrate the individual components, the insert 6 and receiving element 8 are shown here in a disengaged, i.e., unconnected, state. The receiving element 8 has a cylindrical channel 40, in which the insert element 6 is located at least partially after insertion. Furthermore, the receiving element 8 includes an insertion side 42, which faces the insert element 6 during insertion, and a boundary side 44, which faces away from the insert element 6. The channel 40 has an inner wall 48 and a sheath 46. A projection 50 is formed on the inner wall 48 near the boundary side 44, which blocks the insert element 6, in particular its blocking element 18, during insertion, preventing further insertion along the longitudinal axis 24. The insert element 6 includes a temperature measuring device 4, which has an electrical contact element 20, a retaining section 26, a blocking element 18, and a temperature sensor 22 along the longitudinal axis 24. The constriction 32 between the blocking element 18 and the temperature sensor 22 is designed to receive a sealing element 16, in particular a sealing ring 34 (not shown here). The connecting element 10 is attached to the retaining section 26 and is designed here as a component 12 that can be moved about the retaining section 26 and that frames the insert element 6 in sections. The movable component 12 also serves as a gripping element 78, at which a user can safely grip the insert element 6.

[0076] When the insertion element 6 is inserted into the receiving element 8, the connecting element 10 connects these components with an insertion movement, a sealing movement, and a closing movement. The closing movement involves a relative movement of the movable part 12, here a rotational movement. The insertion movement occurs along the longitudinal axis 24. The closing movement occurs orthogonally to the longitudinal axis 24. The sealing effected by the sealing element 16 (not shown) is essentially achieved by the insertion movement along the longitudinal axis 24 and is essentially decoupled from the closing movement.

[0077] Figure 3 A first embodiment of a receiving element 8 is shown. In the variant shown here, the receiving element 8 comprises an insertion side 42 (which faces the insertion element 6 during insertion) and a boundary side 44 (not shown here), a channel 40 with an inner wall 48, and a sheath 46. A projection 50 is formed on the inner wall 48, which blocks the insertion element 6 during insertion. The portion of the receiving element 8 shown in the figure forms a bayonet closure ( Figure 4 The female part 60 of the female part (the counterpart in FIG) has two grooves 70, which extend helically in the direction of the projection 50. Here, each groove 70 forms an angle 80 of less than 45° with the insertion side 42.

[0078] Figure 4A first embodiment of the insert element 6 is shown. Here, the movable part 12 constitutes the male part 58 of the bayonet closure and is coupled to the Figure 3 The movable part 12 is designed here as a locking element 62, which is movably mounted on the holding section 26. The locking element 62 is designed as a mounted, rotatable locking sleeve 64, which at the same time forms a gripping element 78 at which the user can reliably grip the insertion element 6. The locking sleeve 64 has two knobs 66, which can be engaged by grooves 70 ( Figure 3 ) is received. The locking element 62 is mounted so as to be movable about the retaining section 26 along the longitudinal axis 24. The two retaining elements 68 prevent the locking element 62 from slipping off the retaining section 26 and limit the movement along the longitudinal axis 24. In this case, the closing movement performed by the bayonet closure comprises a rotational movement about the longitudinal axis 24, wherein the rotation angle is greater than 90°.

[0079] Figure 5 A second embodiment of the receiving element 8 is shown. Figure 3 and Figure 4 The variant of the bayonet closure shown in FIG differs in that the connecting element 10 in the form of a movable part 12 is part of the receiving element 8. The movable part 12 is designed here as an engagement element 72 between the insertion side 42 and the boundary side 44 (not shown here) and is located in front of the projection 50 starting from the insertion side 42. The engagement element 72 is designed as an outlet 74 protruding from the inner wall 48 into the channel 40. When the insertion element 6 is inserted into the receiving element 8, the insertion element 6 exerts pressure on the engagement element 72, so that the engagement element is received in the sheath 46 and no longer protrudes into the channel 40. Alternatively or additionally, pressure can also be exerted on the engagement element 72 by actuating a pressure element 76, which is connected to the engagement element 72 and, together with the engagement element, forms the connecting element 10, in particular the movable part 12.

[0080] Figure 6 A second embodiment of the insert element 6 is shown. Figure 5 8 is compatible with the receiving element 8 shown in FIG. As seen in the direction of the longitudinal axis 24, the insert element 6 comprises the electrical contact element 20, the holding section 26, the blocking element 18, and the heating element 14, which is designed here as a cylindrical heating rod 36. Between the blocking element 18 and the heating element 14 is a sealing element 16, which is designed here as a sealing ring 34.

[0081] Figure 7 Show Figure 5A cross-sectional view of the receiving element 8 is shown. The connecting element 10 is configured as a movable part 12. The movable part 12 includes an engagement element 72 located in front of the projection 50. The engagement element 72 is configured as an outlet 74 that protrudes from the inner wall 48 into the channel 40. Furthermore, the movable part 12 includes a pressure element 76, which is connected to the engagement element 72. By applying pressure to the pressure element 76, the movable part 12 enters the channel 40, so that the outlet 74 lies flat in the sheath 46 and no longer protrudes into the channel 40.

[0082] Finally, it should be pointed out that terms such as “having”, “comprising”, “including”, “with” etc. do not exclude other elements or steps, and indefinite articles such as “a” or “an” etc. do not exclude a plurality.

[0083] Furthermore, it should be pointed out that the features or steps described with reference to one of the aforementioned embodiments may also be used in combination with the features or steps described with reference to other embodiments of the aforementioned embodiments.

[0084] Reference signs in the claims should not be construed as limiting the scope of the subject matter defined by the claims.

[0085] Reference Signs List

[0086] 1 Fixture

[0087] 2 Heating device

[0088] 4 Temperature measuring device

[0089] 6Insert components

[0090] 8 receiving elements

[0091] 10 Connecting elements

[0092] 12 moving parts

[0093] 14 Heating element

[0094] 16 Sealing element

[0095] 18 arresting elements

[0096] 20 electrical contact elements

[0097] 22 Temperature sensor

[0098] 24 vertical axis

[0099] 26 hold segments

[0100] 28 outer shell

[0101] 30 Liquid Chamber

[0102] 32 constriction

[0103] 34 Sealing ring

[0104] 36 heating rod

[0105] 38 Dip Tube

[0106] 40 channels

[0107] 42 Insertion side

[0108] 44 Border side

[0109] 46 sheath

[0110] 48 inner wall

[0111] 50 bulge

[0112] 58 male components

[0113] 60 mother element

[0114] 62 Locking element

[0115] 64 Locking sleeve

[0116] 66 buttons

[0117] 68 holding element

[0118] 70 slots

[0119] 72 meshing elements

[0120] 74 Exit

[0121] 76 Pressure element

[0122] 78 gripping elements

[0123] 80° Angle of the slot to the insertion side.

Claims

1. A fixing device (1) for a medical device, wherein the fixing device (1) comprises: a receiving element (8) which can be fixed to a fixing section of the medical device; an insertion element (6) which can be inserted into the receiving element (8), the insertion element comprising a heating and / or temperature measuring device (2, 4) for heating and / or measuring the temperature of a liquid and / or gas in a liquid chamber (30) of the medical device; A connecting element (10) for connecting the insertion element (6) to the receiving element (8), wherein the connecting element (10) comprises a movable part (12) which is movable relative to the receiving element (8) and / or the insertion element (6) between a locked position and an unlocked position, wherein the movable part (12) is configured to lock the insertion element (6) inserted into the receiving element (8) in the locked position so that the insertion element (6) cannot be removed from the receiving element (8) and to release it in the unlocked position so that it can be removed.

2. The fixing device (1) according to claim 1, in, The movable part (12) is movable between a locked position and an unlocked position and / or is rotatable about a rotation axis (24) through an angle of rotation of at most 360°, preferably at most 180°, particularly preferably at most 90°.

3. The fixing device (1) according to one of the preceding claims, in, The insertion element (6) can be inserted into the receiving element (8) up to a sealing position and connected to the receiving element (8) in a fluid-tight manner in the sealing position, wherein the gap between the insertion element (6) and the receiving element (8) is sealed so that no liquid and / or gas can leak from the liquid chamber (30) to the outside through the gap.

4. The fixing device (1) according to claim 3, in, The fixing device (1) is designed such that the insertion element (6) can be inserted into the sealing position without the insertion element (6) and / or the movable part (12) being rotated relative to the receiving element (8) about the rotation axis (24) by more than 360°, preferably more than 180°, particularly preferably more than 90°.

5. Fixing device (1) according to claim 3 or 4, in, The fixing device (1) further comprises a sealing element (16) for sealing the gap and is configured such that when the insertion element (6) is inserted into the sealing position, the sealing element (26) is compressed on the one hand by the insertion element (6) and / or the connecting element (10) and / or the movable part (12) and on the other hand by the receiving element (8), so that the insertion element (6) is connected to the receiving element (8) in a fluid-tight manner; and / or wherein the movable part (12) is configured to apply a force to the insertion element (6) and / or the receiving element (8) in the locking position, which acts in the direction of the sealing position; and / or The insertion element (6) inserted into the sealing position abuts against at least one stop, which is configured to prevent the insertion element (6) from being inserted further beyond the sealing position.

6. Fixing device (1) according to one of the preceding claims, in, The movable part (12) is designed to be resilient and / or is supported in a resilient manner, so that in the unlocked position a restoring force acting in the direction of the locked position is exerted on the movable part.

7. Fixing device (1) according to one of the preceding claims, in, The heating and / or temperature measuring device (2, 4) comprises at least one of the following components: a heating element (14) for heating a liquid and / or a gas; a temperature sensor (22) for measuring the temperature of a liquid and / or a gas; The heating and / or temperature measuring device (2, 4) further comprises at least one of the following components: an electrical contact element (20) for electrically conductive contact with a heating element (14) and / or a temperature sensor (22); a sealing member (16) for sealing a gap between the receiving member (8) and the inserting member (6) inserted into the receiving member (8); A blocking element (18) is configured to determine a maximum insertion depth of the insertion element (6) when the insertion element (6) is inserted into the receiving element (8).

8. The fixing device (1) according to claim 7, in, The receiving element (8) has at least one protrusion (50) configured to abut against the blocking element (18) when the insertion element (6) is inserted into the receiving element (8), thereby preventing the insertion element (6) from being further inserted.

9. The fixing device (1) according to claim 8, in, The receiving element (8) is designed as a channel (40), in particular as a cylindrical channel (40), having an insertion side (42), a boundary side (44), a jacket (46) and an inner wall (48); Therein, the projection (50) is arranged on the boundary side (44) and / or the inner wall (48).

10. The fixing device (1) according to claim 9, in, The connecting element (10), in particular the movable part (12), comprises at least one engagement element (72) for engaging the insertion element (6) with the receiving element (8); wherein the engagement element (72) is arranged between the insertion side (42) and the boundary side (44) and / or between the insertion side (42) and the projection (50); The engaging element (72) forms an outlet (74) protruding from the inner wall (48) into the channel (40) when the insertion element (6) is not inserted, and is constructed so that when the insertion element (6) is inserted into the receiving element (8), the engaging element is pressed into the sheath (46) by the insertion element (6) and / or by manually operating a pressure element (76) to apply pressure to the outlet (74), so that the outlet (74) no longer protrudes into the channel (40).

11. Fixing device (1) according to one of the preceding claims, in, The insertion element (6) further comprises a holding section (26) for holding the insertion element (6) with one hand, wherein the holding section (26) is configured such that when the insertion element (6) is inserted into the receiving element (8), the holding section is at least partially located outside the receiving element (8).

12. Fixing device (1) according to one of the preceding claims, further comprising: a bayonet latch for locking the insertion element (6) in the receiving element (8) in a locked position, wherein the bayonet latch comprises a male element (58) and a female element (60) complementary to the male element (58) as part of the bayonet latch; wherein the connecting element (10), in particular the movable part (12), comprises a first part of the bayonet closure; and / or Therein, the receiving element (8) comprises the second part of the bayonet closure.

13. The fixing device (1) according to claim 12, in, The connecting element (10), in particular the movable part (12), is designed as a locking element (62), wherein the locking element (62) comprises a locking sleeve (64) and a first part of the bayonet closure, the locking sleeve being arranged on the insert element (6) and being rotatable relative to the insert element (6), the locking sleeve forming a gripping element (78).

14. Fixing device (1) according to claim 13 as dependent on claim 11, in, The locking sleeve (64) is placed on the holding section (26), in particular such that when the insertion element (6) is inserted into the receiving element (8), the locking sleeve is at least partially located outside the receiving element (8); and / or The locking element (62) is supported movably relative to the holding section (26) along the longitudinal axis (24) of the heating and / or temperature measuring device (2, 4) and / or the insertion element (6), wherein at least one holding element (68) is formed on the side of the locking element (62) facing the holding section (26) in order to limit the path of the locking element (62) when it is moved in at least one direction along the longitudinal axis (24).

15. A medical device comprising: Liquid chamber (30); Fixed section; The fastening device ( 1 ) according to claim 1 , wherein the receiving element ( 8 ) of the fastening device ( 1 ) is fastened to the fastening section.

Images