CN215536953U - Thoracic drainage device - Google Patents

Abstract

A thoracic drainage device has a locking mechanism provided on one of a main body and a collection container, and a trigger provided on the other. The locking mechanism comprises a locking piece, an unlocking piece used for unlocking the locking piece, a first elastic piece used for driving the locking piece to move towards the locking direction, and a limiting structure used for limiting the locking piece at the unlocking position. Retaining member and limit structure activity set up, and when the trigger piece inserted locking mechanical system's the position of inserting, trigger piece drive limit structure release retaining member, and first elastic component drive retaining member removes to the locking position to locking host computer or collecting container. When the unlocking is needed, a user can directly drive the locking piece to unlock through the unlocking piece, so that the main machine and the collecting container are separated. The whole installation and disassembly process is simple to operate.

Description

Thoracic drainage device

Technical Field

The application relates to a medical apparatus, in particular to an assembly structure of a collecting container and a host machine in a chest drainage device.

Background

A chest drainage device is a commonly used medical device, and may be used, for example, in drainage of pleural and mediastinal cavities for traumatic pneumothorax, after cardiac or thoracic surgery, and in chest injuries, pleural effusion or other related conditions.

In general, in one arrangement, the chest drainage device has a main body and a collection container for collecting fluid, the main body being operable to control the drainage of fluid, for example by controlling the pressure of air within the collection container, so as to draw fluid from the patient into the collection container. The collection container is typically removably attached to the host computer so that the collection container can be removed from the host computer when desired.

However, the assembly structure of the existing host and the collection container is complex to operate, and needs to be positioned first, then rotated and then fixed by the bayonet. During unloading, one hand is required to press a release button and the other hand is required to take the collecting container, and certain difficulty is caused in operation.

Disclosure of Invention

The present application provides a thoracic drainage device to provide a new host and collection container assembly structure.

In view of the above, in one embodiment, the present application provides a thoracic drainage device, comprising a collection container for receiving drainage fluid and a host for controlling drainage of the fluid, one of the main machine and the collecting container is provided with a locking mechanism, the other one is provided with a trigger, the locking mechanism comprises a locking piece, an unlocking piece used for unlocking the locking piece, a first elastic piece used for driving the locking piece to move to a locking position and a limiting structure used for limiting the locking piece at the unlocking position, the locking piece and the limiting structure are movably arranged, the locking mechanism is provided with an insertion position for inserting the trigger piece, during the process of inserting the trigger piece into the inserting position, the trigger piece drives the limiting structure to release the locking piece, the first elastic piece drives the locking piece to move to a locking position so as to lock the host machine or the collection container; the unlocking piece is connected with the locking piece in a transmission mode and used for driving the locking piece to move to the unlocking position under the action of external force, so that the locking piece returns to the unlocking position, and the limiting structure is used for limiting the locking piece to the unlocking position again.

In one embodiment, the limiting structure comprises a limiting part and a second elastic part, the limiting part is used for limiting the locking part at an unlocking position, the trigger part is driven to rotate and release the locking part when being inserted, and the second elastic part directly or indirectly acts on the limiting part and is used for driving the limiting part to reset.

In one embodiment, the limiting structure includes a first transmission member which is rotatably disposed, the limiting member and the first transmission member are coaxially disposed, the first transmission member has a trigger portion for contacting with the trigger member, the trigger portion is located at the insertion position, the first transmission member is driven to rotate when the trigger member is inserted, and the first transmission member drives the limiting member to coaxially rotate so as to drive the locking member to release; the second elastic piece is used for driving the first transmission piece and the limiting piece to reset together.

In one embodiment, the second elastic member is a torsion spring, and two rotating arms of the torsion spring are respectively connected with the first transmission member and the limiting member to drive the first transmission member and the limiting member to rotate and reset in the same direction.

In one embodiment, the limiting structure includes a reset limiting member, and the reset limiting member is located in the reset direction of the limiting member to limit the farthest position of the limiting member in the reset direction.

In one embodiment, the locking mechanism comprises a second transmission member capable of performing linear reciprocating motion, the second transmission member is in transmission connection with a locking member, and the limiting member is located on a moving path of the second transmission member so as to limit the locking member to an unlocking position; when the trigger piece is inserted, the limiting piece is driven to release the second transmission piece, and the first elastic piece drives the second transmission piece and the locking piece to move to a locking position; the unlocking piece is in transmission connection with the second transmission piece so as to drive the second transmission piece and the locking piece to move to the unlocking position when unlocking is carried out, and the limiting piece is right to limit the second transmission piece.

In one embodiment, the second transmission member is disposed in a manner of reciprocating in a straight line along a vertical direction, and a rotation axis of the limiting member is perpendicular to a reciprocating direction of the second transmission member.

In one embodiment, the locking member is rotatably arranged, a buckling part used for locking the host or the collection container is arranged at one end of the locking member, a movable connecting part is arranged at the other end of the locking member, and the second transmission member is movably connected with the movable connecting part so as to drive the buckling part to rotate when the second transmission member reciprocates in a linear motion in the vertical direction.

In one embodiment, the number of the locking mechanisms is at least two, and the locking mechanisms are arranged side by side, and each locking mechanism is correspondingly provided with one trigger piece.

In one embodiment, the trigger has a locking portion for locking engagement with the retaining member.

In one embodiment, the locking part is a bayonet or a buckle used for being matched with the locking part in a clamping manner.

In one embodiment, the locking mechanism is disposed on the host machine and the trigger is disposed on the collection container.

In one embodiment, the main frame has a base, the locking mechanism is disposed on a side wall or a bottom wall of the base, and the trigger is disposed on a side wall or a bottom wall of the collection container.

According to the chest drainage device of the above embodiment, one of the main body and the collection container is provided with a locking mechanism, and the other is provided with a trigger. The locking mechanism comprises a locking piece, an unlocking piece used for unlocking the locking piece, a first elastic piece used for driving the locking piece to move towards the locking direction, and a limiting structure used for limiting the locking piece at the unlocking position. Retaining member and limit structure activity set up, and when the trigger piece inserted locking mechanical system's the position of inserting, trigger piece drive limit structure release retaining member, and first elastic component drive retaining member removes to the locking position to locking host computer or collecting container. When the unlocking is needed, a user can directly drive the locking piece to unlock through the unlocking piece, so that the main machine and the collecting container are separated. The whole installation and disassembly process is simple to operate.

Drawings

FIG. 1 is a schematic diagram of a chest drainage device according to one embodiment;

FIG. 2 is a schematic diagram of a main body of the chest drainage device according to an embodiment;

FIG. 3 is a schematic diagram of the locking mechanism in one embodiment;

FIG. 4 is a schematic structural view illustrating the triggering member starting to trigger the first transmission member during the installation stage according to an embodiment;

FIG. 5 is a schematic structural diagram illustrating the disengagement between the limiting member and the second driving member during the installation stage according to an embodiment;

FIG. 6 is a schematic view of the locking member in a locked position during an installation phase in accordance with one embodiment;

FIG. 7 is a schematic view of the unlocking member beginning to unlock during the disassembly phase in one embodiment;

FIG. 8 is a schematic structural diagram illustrating the second position-limiting member moving below the position-limiting member during a disassembly stage according to an embodiment;

FIG. 9 is a schematic structural diagram illustrating an embodiment of a stop member locking a second stop member during a disassembly stage;

FIG. 10 is a schematic view of the trigger on the collection container in one embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

In one embodiment, a chest drainage device is provided for draining fluid from a patient's chest cavity.

Referring to fig. 1 and 2, the chest drainage device includes a main body 100 for controlling drainage of fluid and a collection container 200 for receiving the drained fluid. The collection container 200 is mainly used for receiving liquid. The main body 100 mainly performs the functions of controlling the gas in the suction collection container 200, for example, referring to fig. 2, in one embodiment, the main body 100 may have a negative pressure detection port 101 and a negative pressure suction port 102. The negative pressure detection port 101 and the negative pressure suction port 102 may each be in direct or indirect communication with a corresponding negative pressure detection docking port 230 and negative pressure suction docking port 220 on the collection container 200. The negative pressure detection port 101 is used to collect the air pressure in the collection container 200 for pressure detection and monitoring. The negative pressure suction port 102 is used for sucking the gas in the collection container 200, so that a negative pressure environment is formed in the collection container 200, thereby sucking the gas in the chest cavity of the patient. The host 100 may adopt various structures of the host 100, such as a control circuit board, a negative pressure suction system, and other components, which can be referred to in the prior art.

In one embodiment, referring to FIGS. 1, 2 and 10, one of the host 100 and collection container 200 is provided with a locking mechanism 120 and the other is provided with a trigger 240. For example, the locking mechanism 120 is disposed on the host device 100 and the trigger 240 is disposed on the collection container 200. Referring to fig. 1 to 9, the locking mechanism 120 includes a locking member 121, an unlocking member 122 for unlocking the locking member 121, a first elastic member 123 for driving the locking member 121 to move in a locking direction, and a limiting structure for limiting the locking member 121 to an unlocking position.

The locking member 121 and the retaining structure are movably disposed, and the locking mechanism 120 has an insertion site 103 for insertion of the trigger 240 so that the trigger 240 can be inserted into the locking mechanism 120. Referring to fig. 4 to 6, during the process of inserting the trigger 240 into the insertion site 103, the trigger 240 actuates the position-limiting structure to release the locking member 121, and the first elastic member 123 actuates the locking member 121 to move to the locking position to lock the collection container 200. Fig. 6 shows a schematic view of the locking member 121 in the locked position. The trigger 240 may directly or indirectly actuate the limit structure. The locking member 121 may lock the trigger member 240 itself or may lock other positions of the collection container 200. Unlocking piece 122 is connected with retaining member 121 transmission, and when needs unblock, please refer to fig. 7 to 9, user's accessible triggers (like pressing, mode such as stirring) unlocking piece 122 to drive retaining member 121 and move to the unlocking position, so that retaining member 121 gets back to the unlocking position, as shown in fig. 9, limit structure realizes spacingly to retaining member 121 simultaneously. At this time, the collection container 200 and the main body 100 may be separated.

Of course, in other embodiments, the locking mechanism 120 may be disposed on the collection container 200 and the trigger 240 may be located on the host 100.

In this embodiment, the transmission connection includes, but is not limited to, transmitting force and motion through a fixed connection, an integral molding, a movable connection, and the like.

When the thoracic drainage device is assembled with the collection container 200 and the main body 100, only the collection container 200 needs to be inserted into the main body 100, and the locking member 121 can be automatically locked to the corresponding main body 100 or collection container 200. When unlocking is required, unlocking can be realized only by triggering the unlocking piece 122. The whole installation and disassembly process is simple to operate and high in efficiency.

In the unlocked state, the retaining structure retains the locking member 121 in the unlocked position, which facilitates insertion of a mating portion corresponding to the locking member 121 into the locking mechanism, such as the trigger 240 itself, or other components of the host 100 or the collection container 200. The restriction of the lock member 121 by the stopper structure is releasable. In one embodiment, some or all of the retaining structures are movably disposed to retain and release the locking member 121 by changing the position of the retaining structure.

Referring to fig. 4 to 9, in an embodiment, the limiting structure includes a limiting member 123 and a second elastic member (not shown in the drawings) which are rotatably disposed. The limiting member 123 is used to limit the locking member 121 to the unlocking position, as shown in fig. 4 and 9, when the trigger 240 is inserted, the limiting member 123 is driven to rotate and release the locking member 121, so that the locking member 121 can be locked to the corresponding matching portion (e.g., the trigger 240), as shown in fig. 6. The second elastic member directly or indirectly acts on the limiting member 123, and is used for driving the limiting member 123 to reset after other external forces on the limiting member 123 are removed, for example, as shown in fig. 8 and 9, when the unlocking member 122 drives the locking member 121 to move to the unlocking position by a certain distance, the second elastic member drives the limiting member 123 to limit the locking member 121 at the unlocking position.

Referring to fig. 4, in an embodiment, the position-limiting member 123 may have a protruding abutting portion 1231, and the abutting portion 1231 may extend to a path of the locking member 121 or another component (such as the second transmission member 126) in transmission connection with the locking member 121 when the position-limiting member 123 moves to a certain position, so as to limit the locking member 121 to the unlocking position when necessary.

The trigger 240 can directly or indirectly drive the limiting member 123 to rotate. Referring to fig. 4 to 9, in an embodiment, the position limiting structure includes a first transmission member 124 rotatably disposed, and the first transmission member 124 and the position limiting member 123 are coaxially disposed. The first transmission member 124 has a triggering portion 1241 for contacting the triggering member 240, and the triggering portion 1241 is located at the inserting position 103 so as to drive the first transmission member 124 to rotate when the triggering member 240 is inserted, as shown in fig. 4 and 5. Of course, in some embodiments, the triggering member 240 can also indirectly drive the first transmission member 124 to rotate.

Referring to fig. 4, in an embodiment, the triggering portion 1241 may be protruded to facilitate the contact between the triggering member 240 and the triggering portion 1241 for driving the first transmission member 124 to rotate.

When the first transmission member 124 rotates, the limiting member 123 can be driven to rotate coaxially, so as to enable the limiting member 123 to release the locking member 121. When other external forces of the first transmission member 124 and the limiting member 123 disappear, the second elastic member is used to drive the limiting member 123 and the limiting member 123 to reset, and return to the initial state, as shown in fig. 8 and 9.

For example, in an embodiment, the second elastic member is a torsion spring, the torsion spring is rotatably disposed, two rotating arms of the torsion spring are respectively connected to the first transmission member 124 and the limiting member 123, and when the first transmission member 124 rotates, the limiting member 123 is driven to rotate together in the same direction. When other external forces of the first transmission member 124 and the limiting member 123 disappear, the elastic force of the torsion spring drives the limiting member 123 and the limiting member 123 to rotate and reset in the same opposite direction.

Of course, in other embodiments, the coaxial rotation and the reverse reset of the first transmission member 124 and the limiting member 123 can be realized by other structures.

Referring to fig. 4 to 9, in an embodiment, the first transmission member 124 is located outside the limiting member 123, so that the triggering member 240 is conveniently contacted with the first transmission member 124. The first transmission member 124 is an outer rotating wheel rotatably disposed on the base of the main body 100 or the housing of the collection container 200, and the stop member 123 is an inner rotating wheel rotatably disposed on the base of the main body 100 or the housing of the collection container 200.

In order to prevent the limiting member 123 from moving too much when the limiting member 123 is reset reversely, so that the limiting member 123 is separated from the position capable of limiting the locking member 121 at the unlocking position, as shown in fig. 4 and 9, the limiting structure includes a reset limiting member 125, and the reset limiting member 125 is located in the resetting direction of the limiting member 123 to limit the farthest position of the limiting member 123 in the resetting direction. The stop member 123, when in the distal-most position, can directly or indirectly form an obstruction to the locking member 121, preventing the locking member 121 from moving to the locked position, as shown in fig. 4 and 9. The reset limiter 125 may be a stop, dog, or other structure.

Of course, the first transmission member 124 may not be limited in the resetting direction, or a reset limiting member 125 that is further behind the limiting member 123 is provided, so that the first transmission member 124 is larger in rotation angle than the resetting member when being reset reversely, and is closer to the inlet direction of the insertion position 103 of the locking mechanism 120, thereby facilitating the contact between the trigger member 240 and the first transmission member 124, and the trigger member 240 can more easily drive the first transmission member 124 and the limiting member 123 to move.

Further, the position-limiting structure or member 123 may directly or indirectly limit the locking member 121 to the unlocking position. Taking indirect driving as an example, referring to fig. 4 to 9, in one embodiment, the locking mechanism 120 includes a second transmission member 126 capable of performing linear reciprocating motion. The second transmission member 126 is in transmission connection with the locking member 121, the limiting member 123 is located on a moving path of the second transmission member 126, and the locking member 121 is limited to the unlocking position by limiting the movement of the second transmission member 126.

Referring to fig. 4 to 6, when the triggering member 240 is inserted, the triggering member 240 can drive the limiting member 123 to release the second transmission member 126, and the first elastic member 123 drives the second transmission member 126 and the locking member 121 to move to the locking position, as shown in fig. 6.

Further, referring to fig. 3, 7 to 9, the unlocking member 122 is in transmission connection with the second transmission member 126 to drive the second transmission member 126 and the locking member 121 to move to the unlocking position during unlocking, and the limiting member 123 limits the second transmission member 126. The unlocking member 122 and the second transmission member 126 may be integrally formed, or may be fixedly connected or movably connected to each other to realize transmission connection therebetween.

Further, referring to fig. 4 to 9, in an embodiment, the second transmission member 126 is disposed in a manner capable of reciprocating linearly in a vertical direction, for example, disposed on a base of the main machine 100 or a housing of the collection container 200. The rotation axis of the limiting member 123 is perpendicular to the direction of the reciprocating linear motion of the second transmission member 126.

In this embodiment, the upward movement is to move to the locked position and the downward movement is to move to the unlocked position. Of course, in other embodiments, the second transmission member 126 may be disposed in a manner capable of reciprocating linear motion in a horizontal direction or an inclined direction.

Further, the second transmission member 126 is in transmission connection with the locking member 121, and the transmission of force and movement can be realized by integral molding, fixed connection or movable connection.

Referring to fig. 1 to 9, in one embodiment, the locking member 121 is rotatably disposed, for example, rotatably mounted on the base 110 of the main body 100 or the housing 210 of the collecting container 200. One end of the locking member 121 has a locking portion 1211 for locking the main body 100 or the collection container 200, and the other end of the locking member 121 has a movable connecting portion 1212. The catch 1211 can lock and unlock with the trigger 240 or other mating part. For example, in one embodiment, the trigger 240 has a locking portion for locking engagement with the locking member 121.

Further, referring to fig. 10, in an embodiment, the locking portion is a bayonet 241 or a buckle for snap-fitting with the locking member 121. When the locking member 121 is located at the locking position, the locking member 121 is snapped into the notch 241. When the locker 121 is in the unlocked position, it is separated from the catch 241.

Further, referring to fig. 4 to 9, in an embodiment, the second transmission member 126 is movably connected to the movable connection portion 1212 to drive the snap-fit portion 1211 to rotate when the second transmission member 126 reciprocates in a linear direction in a vertical direction.

As shown in fig. 4 and 9, the movable connecting portion 1212 may be a chute or a slide rail disposed obliquely, and the second transmission member 126 has a sliding portion slidably disposed in the chute or the slide rail. Of course, the two structures can be interchanged. When the second transmission member 126 reciprocates, the latch portion 1211 of the locking member 121 can be driven to rotate between the locking position and the unlocking position.

Further, the number of the locking mechanisms 120 may be more than one. Referring to fig. 4 and 10, in one embodiment, the number of the locking mechanisms 120 is at least two, and the locking mechanisms are arranged side by side. One trigger 240 is provided for each locking mechanism 120. When two triggers 240 are locked to two locking mechanisms 120 side by side, the locking force is distributed more uniformly, so that the collection container 200 and the main body 100 are connected more stably after being assembled.

Further, referring to fig. 1 and 2, in one embodiment, the main body 100 has a base 110, the locking mechanism 120 is disposed on a side wall or a bottom wall of the base 110, and the trigger 240 is disposed on a side wall or a bottom wall of the collection container 200, so that the main body 100 and the collection container 200 can be mounted and dismounted.

Specifically, the unlocking member 122 may be disposed at a sidewall of the housing 110, which facilitates the user to unlock.

Referring to fig. 4 to 6 and fig. 10, in one embodiment, the locking mechanism 120 is disposed on the host 100, and the trigger 240 is disposed on the collection container 200.

During locking, as shown in fig. 4, the trigger 240 is first inserted into the locking mechanism 120 in a horizontal direction, and during the insertion process, the trigger 240 will contact the first transmission member 124 and cause the first transmission member 124 to rotate in the direction indicated by the arrow. The first transmission member 124 and the limiting member 123 rotate coaxially, and when the first transmission member 124 rotates, the limiting member 123 is driven to rotate along the arrow direction. When the limiting member 123 rotates for a certain position, the second transmission member 126 will be driven to move downward, and the second transmission member 126 drives the locking member 121 to rotate, so that the end of the locking member 121 having the fastening portion 1211 rotates upward, which facilitates the insertion of the triggering member 240.

As shown in fig. 5, 6 and 10, when the limiting member 123 continues to rotate downward to a certain position, the limiting member 123 will be disengaged from the second transmission member 126. The second transmission member 126 is driven by the first elastic member 123 to move upward, so as to drive one end of the locking member 121 having the locking portion 1211 to rotate downward, so as to be locked with the trigger 240. After the locking, the abutting portion 1231 of the limiting member 123 abuts against the second transmission member 126, and at this time, the second transmission member 126 and the limiting member 123 cannot be reset.

In unlocking, as shown in fig. 7, the unlocking member 122 is pressed to move the unlocking member 122 and the second transmission member 126 downward, and the end of the locking member 121 having the catch 1211 moves upward, thereby opening the locked state between the locking member 121 and the trigger member 240, and at this time, the collection container 200 can be removed from the main body 100.

As shown in fig. 8 and 9, when the unlocking member 122 continues to move downward until the locking platform of the second transmission member 126 passes over the abutting portion 1231 of the limiting member 123, the limiting member 123 is released, so that the first transmission member 124 and the limiting member 123 are reset under the driving of the second elastic member, and the abutting portion 1231 of the limiting member 123 returns to the initial state, so as to limit the upward reset of the second transmission member 126, so that the locking member 121 is kept at the unlocking position for the next insertion of the trigger member 240.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims (13)

1. The thoracic drainage device is characterized by comprising a collection container for containing drainage liquid and a main machine for controlling liquid drainage, wherein one of the main machine and the collection container is provided with a locking mechanism, the other one of the main machine and the collection container is provided with a trigger, the locking mechanism comprises a locking member, an unlocking member for unlocking the locking member, a first elastic member for driving the locking member to move to a locking position and a limiting structure for limiting the locking member at the unlocking position, the locking member and the limiting structure are movably arranged, the locking mechanism is provided with an insertion position for inserting the trigger, in the process that the trigger is inserted into the insertion position, the trigger drives the limiting structure to release the locking member, and the first elastic member drives the locking member to move to the locking position so as to lock the main machine or the collection container; the unlocking piece is connected with the locking piece in a transmission mode and used for driving the locking piece to move to the unlocking position under the action of external force, so that the locking piece returns to the unlocking position, and the limiting structure is used for limiting the locking piece to the unlocking position again.

2. The chest drainage device according to claim 1 wherein said limiting structure comprises a rotatably disposed limiting member for limiting said locking member to an unlocked position and a second elastic member for directly or indirectly acting on said limiting member to drive said limiting member to reposition when said trigger member is inserted to rotate and release said locking member.

3. The chest drainage device according to claim 2 wherein the limiting structure comprises a first transmission member rotatably disposed, the limiting member is coaxially disposed with the first transmission member, the first transmission member has a trigger portion for contacting the trigger member, the trigger portion is located at the insertion position, the trigger member drives the first transmission member to rotate when inserted, and the first transmission member drives the limiting member to rotate coaxially to drive the locking member to release; the second elastic piece is used for driving the first transmission piece and the limiting piece to reset together.

4. The chest drainage device according to claim 3 wherein the second elastic member is a torsion spring, and the two rotatable arms of the torsion spring are connected to the first transmission member and the limiting member respectively to drive the first transmission member and the limiting member to rotate and reset in the same direction.

5. The chest drainage device according to claim 4 wherein the limiting structure comprises a reduction limiter located in the reduction direction of the limiting member to limit the furthest position of the limiting member in the reduction direction.

6. The chest drainage device according to claim 2 wherein said locking mechanism comprises a second actuator capable of linear reciprocation, said second actuator being drivingly connected to a locking member, said stop being located in the path of travel of said second actuator to limit said locking member to an unlocked position; when the trigger piece is inserted, the limiting piece is driven to release the second transmission piece, and the first elastic piece drives the second transmission piece and the locking piece to move to a locking position; the unlocking piece is in transmission connection with the second transmission piece so as to drive the second transmission piece and the locking piece to move to the unlocking position when unlocking is carried out, and the limiting piece is right to limit the second transmission piece.

7. The chest drainage device according to claim 6 wherein said second drive member is vertically disposed for reciprocal linear movement, and said axis of rotation of said stop member is perpendicular to the direction of reciprocal linear movement of said second drive member.

8. The chest drainage device according to claim 6 wherein said locking member is rotatably disposed, said locking member has a locking portion at one end thereof for locking said main body or said collection container, said locking member has a movable connecting portion at the other end thereof, and said second transmission member is movably connected to said movable connecting portion for driving said locking portion to rotate when said second transmission member is linearly reciprocated in the vertical direction.

9. The chest drainage device of claim 1, wherein there are at least two of said locking mechanisms disposed side-by-side, one trigger for each locking mechanism.

10. The chest drainage device of claim 1, wherein the trigger has a locking portion for locking engagement with the locking member.

11. The chest drainage device of claim 10, wherein the locking portion is a bayonet or catch for snap-fitting with the retaining member.

12. The chest drainage device according to any of claims 1-11, wherein the locking mechanism is disposed on the host machine and the trigger is disposed on a collection container.

13. The chest drainage device according to claim 12 wherein said main body has a base, said locking mechanism is disposed on a side wall or bottom wall of said base, and said trigger is located on a side wall or bottom wall of said collection container.

Images