PCA automatic control device

Abstract

The utility model discloses a PCA automatic control device comprising a pipeline which comprises a flow limiting pipe, a liquid storage bag and an elastic pipe which are communicated in sequence. The base is of a shell structure with an opening in the upper end face, and a pipeline groove used for containing the pipeline is formed in the base. The key is rotationally connected with the base, the left side of the key is provided with an interceptor plate extending downwards, and the right side of the key is provided with a pressing part extending downwards; the reset assembly is used for providing reset force for anticlockwise rotation of the key; the locking assembly comprises a locking piece and an operating piece which are connected with each other; in the assembling stage, the locking assembly stops the key from rotating anticlockwise, so that the intercepting plate is in the state of not extruding the elastic pipe; in the use stage, external force is applied to the operating piece, and the locking piece relieves blocking of the key; in the liquid medicine adding stage, the pressing part moves downwards, the key rotates clockwise, the pressing part extrudes the liquid storage bag, and the intercepting plate is far away from the pressing elastic pipe. The locking assembly protects the elastic tube from being squeezed in the long-time storage process after being assembled.

Description

Technical Field

[0001] This utility model relates to the field of automatic control pipeline technology for infusion pumps, and in particular to a PCA automatic control device. Background Technology

[0002] Patient-controlled analgesia (PCA) is a pain management technique in which healthcare professionals pre-set the dosage of analgesic drugs based on the patient's pain level and physical condition, and then the patient "manages" the pain themselves.

[0003] Disposable infusion pumps are currently a commonly used infusion tool for postoperative analgesia in clinical practice. They utilize the elastic recoil of a silicone reservoir and a precision flow-limiting device to achieve micro-volume, precise infusion, ensuring accurate dosage and safe delivery to the patient. The medication in the infusion pump is delivered to the patient through two lines: one for a continuous, constant-rate infusion of anesthetic medication, and the other for patients to adjust via a self-regulating handle to increase the infusion rate when experiencing pain, thereby relieving pain and achieving an analgesic effect.

[0004] However, in the use of the above-mentioned devices, the tip that contacts the elastic tube may not spring back after being squeezed for a long time, resulting in the tube not flowing back. Secondly, the pressing area of ​​the self-control handle that contacts the finger is small, which is not ergonomic and makes it difficult to press. Utility Model Content

[0005] This invention aims to solve the problem in the prior art where the automatic control pipeline of an infusion pump is affected by prolonged pressure from the handle, thus affecting the flow path of the pump.

[0006] This invention further solves the problems of cumbersome connection of self-controlled drug delivery tubing in the prior art, which is prone to leakage and endangers patient safety.

[0007] This invention further solves the problem in the prior art that the self-control handle has a small pressing area that contacts the fingers, which is not ergonomic and makes it difficult to press and operate.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A PCA automatic control device, comprising:

[0010] The pipeline includes a flow-limiting tube, a liquid reservoir, and an elastic tube connected in sequence;

[0011] The base is a shell structure with an opening on the upper end face, and the base is provided with a pipe groove arranged in the left and right direction for placing the pipe.

[0012] The button is located at the opening above the base in the left-right direction. The button is equipped with a rotation support and is rotatably connected to the base. A downward-extending baffle is provided on the left side of the button's rotation axis corresponding to the elastic tube, and a downward-extending pressing part is provided on the right side of the button's rotation axis.

[0013] A reset assembly is disposed between the base and the button, and is used to provide a reset force for counterclockwise rotation of the button;

[0014] A locking assembly, the locking assembly comprising a locking element and an operating element connected to each other;

[0015] Assembly stage: The locking component is set between the base and the button to prevent the button from rotating counterclockwise, so that the throttling plate is in a state of not compressing the elastic tube;

[0016] Preparation phase: Remove the operating components and release the locking components from obstructing the buttons;

[0017] Adding medication: The pressing part moves down, the button is rotated clockwise, the pressing part squeezes the reservoir, the cut-off plate moves away from the elastic tube, and the internal flow path of the elastic tube is opened.

[0018] Preferably, the reset component is a spring;

[0019] The base is provided with a first limiting member that cooperates with the spring, and the button is provided with a second limiting member that cooperates with the spring. The first and second limiting members are used to limit the reset component in a preset position to prevent the spring from deviating.

[0020] Preferably, the cross-sectional profile of the button is nearly oval to facilitate pressing.

[0021] Preferably, the base is provided with a placement groove that cooperates with the locking component to restrict the locking component from shifting in the left and right directions, and the locking component is placed into the placement groove during assembly.

[0022] Preferably, the placement slot includes a square slot on the base located to the left of the rotation axis of the button and extending downward from the upper end of the base;

[0023] The locking assembly includes a pin, which has a circular pin handle and a strip-shaped pin head fixedly connected to the pin handle. The pin head is inserted into a square groove to prevent the button from rotating counterclockwise, so that the throttling plate is in a state of not compressing the elastic tube.

[0024] Preferably, the base is provided with a rotating support, and the rotating support and the rotating support are rotatably connected.

[0025] Preferably, there are two rotating supports, which are respectively arranged on the inner surface of the front wall and the inner surface of the rear wall of the base, and the two are symmetrical. A shaft hole is provided in the middle of the rotating support.

[0026] The rotating support is an L-shaped structure that extends downward from the bottom of the button and has elastic deformation capability. The rotating supports are symmetrically arranged on the front and back sides of the button. The lower ends of the rotating supports on the front and back sides of the button are respectively provided with rotating shafts extending horizontally forward and backward. The shaft holes of the rotating supports are fitted onto the rotating shafts and rotate in cooperation with the rotating shafts.

[0027] Preferably, the rotary support and the rotary bracket are connected by snap-fit ​​during assembly.

[0028] Preferably, the rotating support is provided with a guide groove above the corresponding shaft hole to facilitate the engagement of the rotating shaft with the button, and a guide slope is provided on the upper end surface of the guide groove;

[0029] Both the front and rear rotating shafts of the button are chamfered to match the guide slope.

[0030] Preferably, the base is provided with an upwardly protruding protective shell to prevent accidental button presses from squeezing the liquid reservoir.

[0031] The beneficial effects of this utility model are:

[0032] 1. During assembly, place the pin into the slot on the base to prevent the button from rotating counterclockwise, so that the cut-off plate is not squeezed by the silicone tube, which ensures that the silicone tube has good resilience and unobstructed internal flow, and that the silicone tube can still be used normally during long-term storage.

[0033] 2. By setting up pipe grooves, the pipes can be inserted into the pipe grooves and can be safely and stably fixed in the base with simple connectors. This reduces the amount of pipe material, simplifies the pipe structure, reduces the number of bonding links, and reduces the risk of leakage.

[0034] 3. The button cross-section is nearly oval, which is easy to hold and press, and conforms to ergonomics.

[0035] 4. Before use, the plug can be pulled out, and the button will immediately restore the rotation function, making the device's state change quickly and allowing it to enter the use state quickly, making it more convenient and faster to use.

[0036] 5. The base is equipped with an upward-protruding protective shell to prevent accidental button presses from squeezing the liquid reservoir, ensuring safe use. Attached Figure Description

[0037] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0038] Figure 2 This is a schematic diagram of the internal structure of the hidden button in this utility model;

[0039] Figure 3This is an exploded view of the present invention;

[0040] Figure 4 This is a top-view three-dimensional structural diagram of the pipeline in this utility model;

[0041] Figure 5 This is a top-view three-dimensional structural diagram of the base in this utility model;

[0042] Figure 6 This is a frontal three-dimensional structural diagram of the base in this utility model;

[0043] Figure 7 yes Figure 6 Enlarged structural diagram at point A in the middle;

[0044] Figure 8 This is a top-view three-dimensional structural diagram of the button in this utility model;

[0045] Figure 9 This is a schematic diagram of the three-dimensional structure of the pin in this utility model.

[0046] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0048] like Figures 1-9 As shown, a PCA automatic control device includes a button 1, a pipe 2, a base 3, a reset component, and a locking component.

[0049] Pipeline 2 includes a central reservoir 22. The left end of the reservoir 22 is connected to an elastic tube, and the right end of the reservoir 22 is connected to a flow-limiting tube 23. In this embodiment, the elastic tube is a silicone tube 21.

[0050] The base 3 is a shell structure with an opening on its upper end face. The base 3 is provided with a pipe groove 31 extending from its upper end face to its lower end face and arranged in the left-right direction for placing the pipe 2. In this embodiment, the pipe groove 31 includes an elastic pipe groove 311, a liquid storage bladder placement groove 312 and a flow limiting pipe clamping groove 313 arranged sequentially from the left end face to the right end face of the base 3.

[0051] The base 3 is provided with an upwardly protruding protective shell 36 to prevent accidental pressing of button 1 from squeezing the liquid reservoir 22. In this embodiment, the protective shell 36 gradually rises along the periphery of the base 3 from left to right.

[0052] The base 3 is provided with a placement groove that cooperates with the locking component to restrict the locking component from shifting in the left and right direction. During assembly, the locking component is placed into the placement groove. In this embodiment, the placement groove includes a square groove 32 on the base 3 located to the left of the rotation axis of the button 1 and extending downward from the upper end of the base 3.

[0053] The base 3 is provided with a rotating support 33 for rotating connection with the button 1. In this embodiment, there are two rotating supports 33, which are respectively arranged on the inner surface of the front wall and the inner surface of the rear wall of the base 3, and the two are symmetrical. The rotating support 33 is provided with a shaft hole 333 in the middle.

[0054] In order to facilitate the insertion of the rotating shaft of button 1 into the shaft hole 333, the rotating shaft of button 1 and the rotating support 33 are connected by snap-fit ​​during assembly. In this embodiment, the rotating support 33 is provided with a guide groove 331 above the shaft hole 333 to facilitate the snap-fit ​​of the rotating shaft of button 1, and a guide slope 332 is provided on the upper end surface of the guide groove 331.

[0055] The base 3 is provided with a first limiting member that cooperates with the reset component to limit the reset component in a preset position and prevent the reset component from shifting. In this embodiment, the first limiting member includes a limiting boss 34 on the base 3 located on the right side of the rotation axis of the button 1, and a cylindrical first limiting groove 341 extending downward from its upper end surface is provided in the middle of the limiting boss 34.

[0056] To facilitate the arrangement of the pipe 2, the pipe groove 31 passes through the limiting boss 34, and the lower end face of the first limiting groove 341 is higher than the lower end face of the pipe groove 31, in order to prevent the reset component in the first limiting groove 341 from interfering with the pipe 2 in the pipe groove 31.

[0057] A flow-limiting tube slot 35 is provided at the middle of the right end of the base 3. The flow-limiting tube slot 313 is located in the middle of the flow-limiting tube slot 35. The right end interface of the liquid storage bladder 22 abuts against the left end face of the flow-limiting tube slot 35. The left end interface of the liquid storage bladder 22 is located in the pipeline groove 31 in the boss 34, which is used to limit the displacement of the liquid storage bladder 22.

[0058] Button 1 is positioned at the opening above base 3 along the left-right direction and is rotatably connected to base 3. Button 1 is provided with a rotating support, and the rotating support 12 and the rotating bracket 33 are rotatably connected. In this embodiment, the rotating support 12 is an L-shaped structure that extends downward from the lower end of button 1 and has elastic deformation capability. The rotating support 12 is symmetrically arranged on the front and rear sides of button 1. The lower ends of the rotating supports 12 on the front and rear sides of button 1 are respectively provided with rotating shafts 121 extending horizontally forward and backward. The shaft hole 333 of the rotating bracket 33 is sleeved on the rotating shaft 121 and rotatably engaged with the rotating shaft 121.

[0059] The shape of button 1 is adapted to human fingers for easy pressing operation. In this embodiment, the cross-sectional profile of button 1 is nearly oval. The left end of the cross-section of button 1 is a relatively small diameter arc, and the right end is a relatively large diameter arc. The arc openings at the left and right ends are set opposite to each other and are connected tangentially by two straight lines in the middle.

[0060] To facilitate the assembly of the rotary support 12 into the rotary support 33, the rotary shafts 121 on both the front and rear sides of the button 1 are provided with chamfers that cooperate with the guide slope 332.

[0061] Button 1 is provided with a second limiting member 13 that cooperates with the reset component to limit the reset component in a preset position and prevent the reset component from shifting. In this embodiment, the second limiting member 13 includes a second limiting groove 131 located on the lower end face of button 1 and corresponding to the first limiting groove 341. In order to further limit the shift of the reset component, a downwardly extending limiting post 132 is provided in the middle of the second limiting groove 131.

[0062] A downward-extending baffle 11 is provided on the left side of the rotation axis of button 1, corresponding to the elastic tube groove 311. It is used as an actuator to squeeze or release the elastic tube by rotating in the vertical plane to control the flow path inside the tube.

[0063] A downwardly extending pressing part 15 is provided on the right side of the rotation axis of button 1, which is used to squeeze the liquid reservoir 25 when button 1 is rotated counterclockwise. The pressing part 15 is cylindrical and adapted to the liquid reservoir 25.

[0064] A reset assembly is disposed between the base 3 and the button 1 to provide a reset force for the button 1 to rotate counterclockwise relative to the base. In this embodiment, the reset assembly is a spring 4, which is disposed in a compressed state on the right side of the rotation axis of the button 1.

[0065] To prevent the spring 4 from shifting, the lower end of the spring 4 is set in the first limiting groove 341 that is adapted, and the upper end is set in the second limiting groove 131 that is adapted.

[0066] The locking assembly includes a locking element and an operating element. During assembly, the locking assembly is positioned between the base 3 and the button 1. The locking element is used to prevent the button 1 from rotating counterclockwise, so that the throttling plate 11 is in a state of not compressing the elastic tube. The locking element is connected to the operating element. Before use, the operating element is used so that when the user applies external force through the operating element, the locking element releases its obstruction of the button 1.

[0067] In this embodiment, the locking component includes a pin 5, which includes a circular pin handle 51. The pin handle 51 is fixedly connected to a strip-shaped pin head 52. The pin head 52 is inserted into a square groove 32 to prevent the button 1 from rotating counterclockwise, so that the throttling plate 11 is in a state of not compressing the elastic tube.

[0068] To facilitate proper use by users, a usage slogan is written on the latch handle 51.

[0069] The working principle of this utility model is as follows:

[0070] Assembly stage:

[0071] ① First, insert pipe 2 into pipe groove 31 to initially fix pipe 2 in pipe groove 31. Then, insert the lower end of spring 4 into the first limiting groove 341 and the upper end into the second limiting groove 131.

[0072] ② Align the rotating shaft 121 of button 1 with the guide groove 331 on the rotating support 33 of base 3, and then press button 1 down. The L-shaped rotating support 12 undergoes elastic deformation in the guide groove 331 and is inserted into the shaft hole 333 under the guidance of the guide groove 331. The rotating shaft 121 of the rotating support 12 and the shaft hole 333 are rotatably connected. At this time, the spring 4 is compressed by button 1, and button 1 has a counterclockwise rotation tendency under the elastic force of spring 4.

[0073] ③ Press the pressing part 15 of button 1 to make the left end of button 1 lift up, then insert the pin head 52 of pin 5 into square groove 32, and then release button 1. Button 1 and pin 5 abut against each other, and pin 5 is inserted into square groove 32, preventing button 1 from rotating counterclockwise, so that the flow cutter 11 is in a state of not squeezing silicone tube 21. During long-term storage, silicone tube 21 maintains good resilience and unobstructed internal flow path.

[0074] Preparation phase:

[0075] Before use, medical staff unpack the package and pull out the pin 5 through the pin handle 51. The button 1 rotates counterclockwise, and the flow cutter 11 squeezes the silicone tube 21, so that the internal flow path of the silicone tube 21 is closed.

[0076] Additional medication application stage:

[0077] When the patient experiences pain and needs additional medication, press the pressure point 15 to squeeze the reservoir 22. At this time, the silicone tube 21 rebounds, and its internal flow path opens. Because the inner diameter of the flow-limiting tube 23 is extremely small, most of the liquid in the reservoir 22 flows into the human body along the silicone tube 21 after being squeezed.

[0078] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0079] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0080] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0082] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A PCA automatic control device, characterized in that, include: The pipeline includes a flow-limiting tube, a liquid reservoir, and an elastic tube connected in sequence; The base is a shell structure with an opening on the upper end face, and the base is provided with a pipe groove arranged in the left and right direction, and the pipe is arranged in the pipe groove; The button is located at the opening above the base in the left-right direction. The button is equipped with a rotation support and is rotatably connected to the base. A downward-extending baffle is provided on the left side of the button's rotation axis corresponding to the elastic tube, and a downward-extending pressing part is provided on the right side of the button's rotation axis. A reset assembly is disposed between the base and the button, and is used to provide a reset force for counterclockwise rotation of the button; A locking assembly, the locking assembly comprising a locking element and an operating element connected to each other; Assembly stage: The locking component is set between the base and the button to prevent the button from rotating counterclockwise, so that the throttling plate is in a state of not compressing the elastic tube; Preparation phase: Remove the operating components and release the locking components from obstructing the buttons; Adding medication: The pressing part moves down, the button is rotated clockwise, the pressing part squeezes the reservoir, the cut-off plate moves away from the elastic tube, and the internal flow path of the elastic tube is opened.

2. The PCA automatic control device as described in claim 1, characterized in that, The reset component is a spring; The base is provided with a first limiting member that cooperates with the spring, and the button is provided with a second limiting member that cooperates with the spring. The first and second limiting members are used to limit the reset component in a preset position to prevent the spring from deviating.

3. The PCA automatic control device as described in claim 1, characterized in that, The button has a near-oval cross-sectional profile to facilitate pressing.

4. A PCA automatic control device as described in claim 1, characterized in that, The base is provided with a placement slot that cooperates with the locking component to restrict the locking component from moving in the left and right directions. During assembly, the locking component is placed into the placement slot.

5. A PCA automatic control device as described in claim 4, characterized in that, The placement slot includes a square slot on the base located to the left of the rotation axis of the button and extending downward from the upper end of the base; The locking assembly includes a pin, which has a circular pin handle and a strip-shaped pin head fixedly connected to the pin handle. The pin head is inserted into a square groove to prevent the button from rotating counterclockwise, so that the throttling plate is in a state of not compressing the elastic tube.

6. The PCA automatic control device as described in claim 1, characterized in that, The base is provided with a rotating support, and the rotating support and the rotating support are rotatably connected.

7. A PCA automatic control device as described in claim 6, characterized in that, Two rotating supports are provided, respectively arranged on the inner surface of the front wall and the inner surface of the rear wall of the base, and the two are symmetrical. A shaft hole is provided in the middle of the rotating support. The rotating support is an L-shaped structure that extends downward from the bottom of the button and has elastic deformation capability. The rotating supports are symmetrically arranged on the front and back sides of the button. The lower ends of the rotating supports on the front and back sides of the button are respectively provided with rotating shafts extending horizontally forward and backward. The shaft holes of the rotating supports are fitted onto the rotating shafts and rotate in cooperation with the rotating shafts.

8. A PCA automatic control device as described in claim 6, characterized in that, The rotary support and rotary bracket are connected by snap-fit ​​during assembly.

9. A PCA automatic control device as described in claim 8, characterized in that, The rotating support is provided with a guide groove above the corresponding shaft hole to facilitate the engagement of the rotating shaft with the button, and a guide slope is provided on the upper end surface of the guide groove. Both the front and rear rotating shafts of the button are chamfered to match the guide slope.

10. A PCA automatic control device as described in any one of claims 1-9, characterized in that, The base is equipped with an upward-protruding protective shell to prevent accidental button presses from squeezing the liquid reservoir.

Images