CN219332772U - Locking device, medicine box and portable infusion device - Google Patents

Abstract

The utility model provides a locking device, a medicine box and a portable infusion device. The medicine box comprises a fixing piece, and the locking device comprises a rotating component, a locking hook and a resetting piece. The body of latch hook and joint portion fixed connection, and joint portion orientation mounting direction extends for with the mounting lock. The rotating block of the rotating assembly is convexly arranged on the axial side wall of the rotating shaft. The reset piece is arranged on the body and positioned on the rotating path of the rotating block, and the elastic compression direction of the reset piece is vertical to the axial direction of the rotating shaft. When the body moves along the first direction, the rotating block is driven to rotate towards the reset piece and prop against the reset piece, so that the reset piece is elastically compressed and generates elastic restoring force, and the elastic restoring force can drive the rotating block to rotate towards the direction away from the reset piece so as to drive the body to move along the second direction; the first direction and the second direction are parallel to the axial direction of the rotating shaft and are opposite to each other. The infusion device provided by the utility model can solve the technical problem that the existing infusion device is complex in installation mode.

Description

Locking device, medicine box and portable infusion device

Technical Field

The utility model relates to the technical field of medical treatment, in particular to a locking device, a medicine box and a portable infusion device.

Background

In modern medical practice, portable infusion pumps are increasingly used in cancer pain, painless delivery, postoperative pain and the like due to the advantages of small size, portability and the like. The portable infusion pump consists of a medicine box and an infusion pump, wherein the connection part between the medicine box and the infusion pump plays a vital role. The mounting mode between the medicine box and the infusion pump in the prior art is complex.

Disclosure of Invention

The application provides a locking device, a medicine box and a portable infusion device to solve the technical problem that the box body mounting mode of an infusion pump and a medicine box in the prior art is complicated.

To solve the above technical problem, in a first aspect, the present application provides a locking device for a drug cassette, the drug cassette comprising a fixing member. The locking device comprises a rotating component, a locking hook and a reset piece. The latch hook comprises a body and a clamping portion, wherein the body is fixedly connected with the clamping portion, the clamping portion extends towards the direction of the fixing piece, and the clamping portion is used for being locked with the fixing piece. The rotating assembly comprises a rotating shaft and a rotating block, and the rotating block is convexly arranged on the axial side wall of the rotating shaft; the rotating shaft is in rotating and sliding connection with the body, the rotating block is in rotating connection with the body, and the rotating shaft can drive the rotating block to rotate relative to the body, so that the rotating block drives the body to axially slide along the rotating shaft. The reset piece is arranged on the body and positioned on the rotating path of the rotating block, and the elastic compression direction of the reset piece is perpendicular to the axial direction of the rotating shaft. When the body moves along the first direction, the rotating block is driven to rotate towards the resetting piece and prop against the resetting piece, so that the resetting piece is elastically compressed and generates elastic restoring force, and the elastic restoring force can drive the rotating block to rotate towards the direction away from the resetting piece so as to drive the body to move along the second direction. The first direction and the second direction are parallel to the axial direction of the rotating shaft and are opposite to each other.

In a possible embodiment, the locking means comprise an initial state and a closed state. When the locking device is in the initial state, the reset piece is in a precompressed state. When the locking device and/or the fixing piece move relative to each other, the fixing piece abuts against the clamping part, and the locking hook moves along the first direction so as to drive the rotating block to abut against and compress the reset piece. When the clamping part enters the locking space of the fixing piece, the reset piece elastically returns to drive the rotating block to rotate in the direction away from the reset piece, and the lock hook moves in the second direction, so that the clamping part moves towards the fixing piece and is locked with the fixing piece, and the locking device is in the closed state.

In a possible implementation manner, the locking device further includes an open state, when the locking device is in the open state, the clamping portion is unlocked from the fixing piece, the rotating block abuts against and compresses the reset piece, and the reset piece elastically returns to drive the rotating block to rotate towards a direction away from the reset piece, and returns the reset piece to the pre-compression state, so that the locking device is in the initial state.

In one possible embodiment, the restoring member includes a protective shell, a restoring body, and an elastic body. The protective housing is equipped with the guide way, the diapire of protective housing is equipped with the through-hole, the through-hole in the guide way intercommunication, and be located the one end of guide way. The reset body comprises a propping part and a sliding part, wherein the propping part is fixedly connected with the sliding part, and the outer diameter of the propping part is larger than that of the sliding part. The supporting part is positioned in the guide groove, one end of the sliding part, which is far away from the supporting part, extends out of the guide groove from the through hole, the elastic body is positioned in the guide groove, and the opposite ends of the elastic body respectively support the supporting part and the bottom wall; when the rotating block moves towards the direction of the resetting piece, the rotating block props against the propping part to compress the elastic body and enable the elastic body to generate elastic restoring force.

In a possible implementation manner, the reset body further comprises a limiting part, wherein the limiting part is fixed at one end of the sliding part far away from the supporting part, and the outer diameter of the limiting part is larger than that of the sliding part; the limiting part is positioned outside the guide groove, and when the elastic body is elastically restored, the limiting part abuts against the bottom wall.

In a possible embodiment, the body comprises a first surface, a second surface and a side surface, the first surface and the second surface being disposed opposite each other, the side surface being connected between the first surface and the second surface; the body is provided with a waist hole, the waist hole penetrates through the first surface and the second surface, and the rotating shaft is installed in the waist hole.

In a possible implementation manner, the rotation axis of the rotating shaft is parallel to and spaced from the geometric center line of the waist hole, and the rotating shaft is rotated to enable the geometric center line of the waist hole to move towards the direction away from the clamping part, so that the clamping part can be driven to move towards the direction close to the rotating shaft and be clamped and locked with the fixing piece; the rotating shaft is rotated to enable the geometric center line of the waist hole to move towards the direction close to the clamping part, and the clamping part can be driven to move towards the direction far away from the rotating shaft and separate from the fixing piece for unlocking.

In a possible implementation manner, the side surface comprises a first side surface and a second side surface, the first side surface and the second side surface are oppositely arranged and connected between the first surface and the second surface, and the clamping part is vertically connected with the second side surface; the first side surface is provided with a first chute, the extending direction of the first chute is intersected with the extending direction of the first side surface, and the first chute is communicated with the waist hole; when the rotating block slides along the first sliding groove, the rotating block props against the side wall of the first sliding groove so as to drive the body to slide along the axial direction of the rotating shaft.

In a possible implementation manner, the side surface further comprises a third side surface, the third side surface is vertically connected between the first side surface and the second side surface, the third side surface is provided with a second sliding groove, the extending direction of the second sliding groove is consistent with that of the second side surface, the second sliding groove is communicated with the first sliding groove and the waist hole, the rotating shaft rotates to drive the rotating block to slide along the second sliding groove in a direction away from the first sliding groove, the clamping part can be driven to move towards a direction close to the rotating shaft, the rotating shaft rotates to drive the rotating block to slide along the second sliding groove in a direction close to the first sliding groove, and the clamping part can be driven to move towards a direction away from the rotating shaft.

In a possible embodiment, the latch hook further includes a protective housing, the protective housing is sleeved on the outer peripheral side of the body, and the body can move in the protective housing along the axial direction and the radial direction of the rotating shaft; the locking device further comprises a fixing frame, and the protective shell is fixed on the fixing frame.

In a possible implementation manner, the locking device further comprises an elastic piece, one end of the elastic piece is fixedly connected with the fixing frame, the other end of the elastic piece is fixedly connected with the clamping portion, the elastic compression direction of the elastic piece is parallel to the axial direction of the rotating shaft, and when the locking hook moves along the axial direction of the rotating shaft, the clamping portion compresses or releases the elastic piece.

In a possible implementation manner, the clamping portion comprises a first extending body and a second extending body, the first extending body is fixedly connected with the body and extends towards the direction away from the body, the second extending body is connected with the first extending body in an included angle mode, the second extending body comprises an inclined surface, the inclined surface faces towards the first extending body and is inclined towards one end of the body, and the inclined surface is used for propping against the fixing piece.

In a second aspect, the present application provides a drug cassette, comprising a cassette body, a fixing member, a support and the locking device described above, wherein the fixing member is fixedly connected with the cassette body, the support is rotatably connected with the cassette body, and the support and the fixing member are located on the same side of the cassette body, and the locking device is fixed on the support.

In a third aspect, the present application provides a portable infusion device, including an infusion pump, an infusion tube, and the above-mentioned drug cassette, where the infusion pump is fixedly connected with a stand of the drug cassette; one end of the infusion tube is communicated with the medicine box, the other end of the infusion tube is used for being connected with a patient, and the infusion pump is arranged on the path of the infusion tube so as to drive the medicine liquid in the infusion tube to flow.

In this application, through setting up the piece that resets to drive the turning block through the elastic restoring force of piece that resets and rotate, can make the turning block reply initial position, drive the axial displacement of latch hook along the pivot simultaneously, make latch hook and mounting lock hold, thereby make locking device and medicine box lock hold, accomplish the pre-installation of medicine box, with the box body that avoids the medicine box drops or opens, simplified locking device's structure, make the installation of medicine box more convenient and fast. Meanwhile, after the medicine box is unlocked with the fixing piece, the resetting piece elastically returns to drive the rotating block to return to the initial position and the locking device returns to the initial state, so that the medicine box is convenient to install next time, and the use of a user is further facilitated.

Drawings

In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.

FIG. 1 is a schematic cross-sectional view of a portable infusion device of the present utility model in an initial state;

FIG. 2 is an enlarged schematic view of the mounting member of the infusion device of FIG. 1;

FIG. 3 is a schematic view of a portion of the infusion device of FIG. 1;

FIG. 4 is a schematic view of a locking mechanism in the infusion device of FIG. 1;

FIG. 5 is a schematic view of a portion of the locking device of FIG. 4 at another angle;

FIG. 6 is a schematic cross-sectional view of the locking device of FIG. 4;

FIG. 7 is a schematic view of a portion of the infusion device of FIG. 1 in an initial state;

FIG. 8 is a schematic view of the infusion device of FIG. 1 in a closed configuration;

FIG. 9 is a schematic view of the infusion device of FIG. 1 in a locked state;

fig. 10 is a schematic view of the infusion device of fig. 1 in an open configuration.

Detailed Description

Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a portable infusion device 200 in an initial state according to the present utility model.

For convenience of description, in this application, the longitudinal direction of the infusion device 200 is defined as the X-direction, the width direction of the infusion device 200 is defined as the Y-direction, and the height direction of the infusion device 200 is defined as the Z-direction. Wherein, X, Y, Z direction is two by two perpendicular.

Infusion set 200 includes an infusion pump, sensors, a first infusion tube (not shown), and a drug cassette 1. The drug cassette 1 comprises a cassette body 110, a second infusion tube (not shown), a fixing member 120, a bracket 130 and a locking device 100. The fixing member 120 is mounted on the case 110 and fixedly connected to the case 110. The bracket 130 is rotatably connected with the case 110, and the bracket 130 and the fixing member 120 are positioned at the same side of the case 110. Infusion pump, sensor and locking device 100 is mounted to a bracket 130. The second infusion tube is mounted to the cassette body 110 and is in communication with the first infusion tube. The infusion pump is arranged on the transmission path of the first infusion tube. When the infusion device 200 is in the working state, the infusion pump drives the liquid medicine of the medicine box 1 to pass through the first infusion tube and the second infusion tube, and the liquid medicine is delivered to the patient.

In this embodiment, the sensor includes a blocking pressure sensor and a bubble sensor. The blocking pressure sensor is used for detecting the blocking condition of the first infusion tube, the bubble sensor is used for detecting the bubble condition of the infusion tube, and the blocking condition and the bubble condition of the infusion tube are monitored through the sensor, so that the normal operation of infusion is ensured. In other embodiments, the sensor may further include a flow sensor for detecting a transmission speed of the medicine in the infusion tube and adjusting a driving speed of the infusion pump according to the detected transmission speed, thereby improving infusion accuracy of the portable infusion device 200.

The cassette 110 includes a top plate 1101, a bottom plate 1102, and side plates 1103. The top plate 1101 and the bottom plate 1102 are disposed opposite to each other, and the side plate 1103 is connected to the periphery of the bottom plate 1102 and fixedly connected to the top plate 1101. The top plate 1101, side plates 1103, and bottom plate 1102 collectively enclose a receiving cavity 1104. The housing 1104 is for housing a medicament. The top plate 1101 of the case 110 is provided with a hinge seat 1105, and the hinge seat 1105 is rotatably connected to the bracket 130. In this embodiment, the hinge seat 1105 is a clamping portion 33. In other embodiments, the hinge seat 1105 may have other configurations as long as a rotational connection with the bracket 130 is achieved.

It should be understood that the terms such as "top" and "bottom" used in describing the case 110 according to the embodiments of the present application are mainly described according to the illustrated orientation of the case 110 in fig. 1, and are not limited to the orientation of the infusion device 200 in a practical application scenario, where the terms are "top" toward the positive Z-axis direction and "bottom" toward the negative Z-axis direction.

Referring to fig. 2, fig. 2 is an enlarged schematic view of the fixing member 120 in the infusion device 200 shown in fig. 1.

The fixing member 120 has a semi-open structure, and functions to, when the locking device 100 and/or the fixing member 120 move toward and close to each other, cooperatively connect with the locking device 100, so that the bracket 130 is locked with the case 110 when the locking device 100 is locked. In this embodiment, the fixing member 120 has a door-shaped structure. In other embodiments, the fixing member 120 may have a semicircular arc structure or a V-shaped structure. In this embodiment, the fixing member 120 is an integrally formed member. Specifically, the molding can be performed by injection molding. In other embodiments, the securing member 120 may also be assembled from a plurality of structural members. In this embodiment, the fixing member 120 is a plastic member. In other embodiments, the securing member 120 may also be a metal member. The mount 120 includes a first cylinder 1201, a second cylinder 1202, and a connecting cylinder 1203. The first column 1201 and the second column 1202 are arranged in parallel and spaced apart. The connection post 1203 is connected between the first post 1201 and the second post 1202, and the extending direction of the connection post 1203 is perpendicular to the extending direction of the first post 1201 and the second post 1202. The first pillar 1201, the connecting pillar 1203, and the second pillar 1202 are connected in sequence, and collectively enclose a locking space 1204. The fixture 120 is mounted to the top plate 1101 of the cartridge body 110. One end of the first column 1201 and the second column 1202, which is opposite to the connecting column 1203, is fixedly connected with the top plate 1101, and the extending direction of the first column 1201 and the second column 1202 is consistent with the Z direction, the connecting column 1203 is arranged at intervals with the top plate 1101, and the extending direction of the connecting column 1203 is consistent with the Y direction.

In this embodiment, the second infusion tube is a polyvinyl chloride (PVC) tube. In other embodiments, the second infusion tube may also be a silicone tube or a polyolefin thermoplastic elastomer 53 (TPE) tube. The second infusion path is fixed on the top plate 1101, and one end of the second infusion tube is located in the accommodating cavity 1104, and the other end extends to the outside and is connected with the patient for infusing the patient. And the second infusion pipeline is communicated with the first infusion pipe. When the infusion device 200 is in an operating state, the infusion pump drives the medical fluid in the accommodating cavity 1104 to pass through the first infusion tube and the second infusion tube, and the medical fluid is delivered to the patient.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating a portion of the infusion device 200 shown in fig. 1.

The support 130 is an elongated plate-shaped structure, and the dimension of the support 130 along the X direction is substantially the same as the dimension of the box 110 along the X direction. The bracket 130 includes an upper surface 1301 and a lower surface 1302, the upper surface 1301 and the lower surface 1302 being disposed opposite. The bracket 130 is provided with a first through hole 1303. The first through holes 1303 penetrate through the upper surface 1301 and the lower surface 1302, and are disposed corresponding to the fixing members 120, and the fixing members 120 may penetrate through the first through holes 1303. When the bracket 130 is mounted to the case 110, the fixing member 120 is positioned in the first through hole 1303. The locking device 100 is mounted on the upper surface 1301 of the bracket 130 and fixedly connected to the bracket 130, and the locking device 100 is disposed corresponding to the first through hole 1303. The bracket 130 is also provided with a connector 1304. In this embodiment, the connection member 1304 is a rotating shaft. The connector 1304 is fixedly coupled to the lower surface 1302, and the structure of the connector 1304 matches the structure of the hinge mount 1105. The bracket 130 is mounted on the case 110, the connecting member 1304 is mounted in the hinge seat 1105, and the connecting member 1304 can rotate relative to the hinge seat 1105. The bracket 130 may rotate about the connection 1304 with respect to the case 110 so that the bracket 130 may be mounted to the case 110 or the bracket 130 may be removed from the case 110. In this embodiment, the support 130 is detachably connected to the case 110, so as to facilitate assembly and disassembly.

Referring to fig. 4 and 5, fig. 4 is a schematic structural view of the locking device 100 in the infusion device 200 shown in fig. 1, and fig. 5 is a schematic structural view of a portion of the locking device 100 shown in fig. 4 at another angle.

The locking device 100 includes a fixing frame 10, a rotating assembly 20, a locking assembly 30, and a reset member 50. The locking assembly 30 is mounted on the rotating assembly 20 and is rotatably and slidably coupled to the rotating assembly 20. The rotating assembly 20 is mounted on the fixing frame 10 and can rotate relative to the fixing frame 10. The fixing frame 10 includes a fixing plate 11 and a fixing base 12. The fixing base 12 is located at the bottom end of the locking device 100, and the fixing base 12 is fixedly connected with the upper surface 1301 of the bracket 130. The surface of the fixing plate 11 is provided with a mounting groove (not shown) penetrating the fixing plate 11 in the thickness direction of the fixing plate 11. The fixed plate 11 is mounted on the fixed seat 12 and fixedly connected with the fixed seat 12, and the surface of the fixed plate 11 is perpendicular to the X direction.

The rotating assembly 20 includes a driving handle 21, a rotating shaft 22, and a rotating block 23. The driving handle 21 is fixedly connected with the rotating shaft 22, the rotating block 23 is fixedly connected with the rotating shaft 22, and the rotating shaft 22 can be driven to rotate by the rotation of the driving handle 21, so that the rotating block 23 is driven to rotate. The shaft 22 includes a first end 221 and a second end 222. The first end 221 and the second end 222 are disposed opposite to each other and are located at opposite ends of the rotation shaft 22 in the length direction. The surface of the rotating shaft 22 is provided with mounting holes (not shown). The extending direction of the mounting hole coincides with the radial direction of the rotation shaft 22. The mounting holes are used for mounting the rotation blocks 23. In this embodiment, the rotating shaft 22 is an eccentric structure. That is, the geometric axis of the rotary shaft 22 is parallel to and spaced apart from the rotational axis of the rotary shaft 22. The geometric axis of the shaft 22 is movable in the radial direction of the shaft 22 as the shaft 22 rotates about its rotational axis.

In this embodiment, the rotating block 23 is cylindrical. The rotating block 23 is installed in the installation hole and fixedly connected with the rotating shaft 22, and the extending direction of the rotating block 23 is perpendicular to the extending direction of the rotating shaft 22. In this embodiment, the rotating block 23 is in interference fit with the mounting hole, so as to ensure the stability of the connection between the rotating block 23 and the rotating shaft 22. In other embodiments, a small amount of clearance may be provided between the rotating block 23 and the inner wall of the mounting hole, so long as the rotating block 23 is fixedly connected to the rotating shaft 22.

In this embodiment, the driving lever 21 is a handle. The drive shaft 21 is fixedly connected to the second end 222 of the rotating shaft 22. The rotation center line of the drive handle 21 coincides with the rotation axis of the rotation shaft 22. When the driving handle 21 rotates, the rotating shaft 22 can be driven to rotate around the rotation axis of the rotating shaft 22, and the rotating shaft 22 is driven to move in the radial direction, and meanwhile, the rotating shaft 22 rotates to drive the rotating block 23 to rotate. In this embodiment, the driving handle 21 and the rotating shaft 22 are integrally formed, so as to ensure the connection stability of the driving handle 21 and the rotating shaft 22. In other embodiments, the driving handle 21 and the rotating shaft 22 may be two separate parts, and the driving handle 21 and the rotating shaft 22 are fixedly connected. The driving handle 21 and the rotating shaft 22 may be fixedly connected by bolts, or the driving handle 21 and the rotating shaft 22 may be fixedly connected by clamping or bonding. The drive shaft 21 is rotatable about the axial direction ω2 or clockwise ω1 of the rotation shaft 22.

In one embodiment, the drive handle 21 may also be a key. When the driving handle 21 is a key, the structure key of the rotating shaft 22 is matched. When the key is mounted on the rotating shaft 22, the rotating key can drive the rotating shaft 22 to rotate, so as to drive the rotating block 23 to rotate. In this embodiment, the key is used as the driving handle 21, and the medicine box 1 can be opened only by using the key matched with the rotating shaft 22, so that the safety of the medicine box 1 is increased.

The rotating assembly 20 is mounted to the fixed plate 11 and is rotatable relative to the fixed plate 11. Wherein the rotation shaft 22 passes through the installation groove of the fixed plate 11 and can rotate in the installation groove, and the driving handle 21 and the rotation block 23 are respectively positioned at two opposite sides of the thickness direction of the fixed plate 11. The extending direction of the rotation shaft 22 is parallel to the X direction. That is, the rotational axis direction and the geometric center line direction of the rotary shaft 22 are parallel to the X direction.

With continued reference to fig. 4 and 5, the locking assembly 30 includes a locking cap 31 and a locking hook 2. The shackle 2 includes a body 32 and a clamping portion 33. The body 32 is a rectangular block. Of course, the body 32 may be other shapes. The body 32 includes a first surface 301, a second surface 302, a first side 303, a second side 304, a third side 305, and a fourth side 306. The first surface 301 and the second surface 302 are disposed opposite to each other and located on opposite sides of the body 32 in the X direction. The first side 303, the third side 305, the second side 304 and the fourth side 306 are joined end to form together the sides of the body 32, the sides of the body 32 being joined between the first surface 301 and the second surface 302. The first side 303 and the second side 304 are disposed opposite to each other and located on opposite sides of the body 32 in the Z direction. The third side 305 and the fourth side 306 are disposed opposite each other and are located on opposite sides of the body 32 in the Y direction.

The body 32 is provided with a waist hole 321 and a chute 322. The extending direction of the waist hole 321 is consistent with the X direction, and the waist hole 321 penetrates the first surface 301 and the second surface 302. The waist hole 321 is used for installing the rotating shaft 22 of the rotating assembly 20. The chute 322 is disposed on the side surface of the body 32 and communicates with the waist hole 321. The chute 322 includes a first chute 323 and a second chute 324. The second chute 324 is disposed on the third side surface 305, and an extending direction of the second chute 324 is parallel to the Z direction. The first chute 323 is disposed on the first side surface 303, and an extending direction of the first chute 323 intersects with the X direction and the Y direction. One end of the first chute 323 is connected and communicated with the second chute 324, and the other end extends along a diagonal line of the first side surface 303 toward the fourth side surface 306. The chute 322 further includes a first retaining wall 325 and a second retaining wall 326. The first limiting wall 325 and the second limiting wall 326 are respectively located at two opposite ends of the extending direction of the chute 322. The first limiting wall 325 is located at an end of the second chute 324 away from the first chute 323, and the second limiting wall 326 is located at an end of the first chute 323 away from the second chute 324. The sliding groove 322 is used for mounting the rotating block 23 of the rotating assembly 20, and the rotating block 23 can slide along the sliding groove 322.

The clamping portion 33 includes a first extension portion 331 and a second extension portion 332. The first extension 331 includes a first side surface 3311 and a second side surface 3312. The first side surface 3311 and the second side surface 3312 are disposed opposite to each other and parallel to the Z-direction. The second extension 332 includes an abutment surface 3321 and an inclined surface 3322. The inclined surface 3322 and the abutting surface 3321 form an acute angle. The second extension portion 332 is fixedly connected to the first extension portion 331, and an extension direction of the second extension portion 332 is perpendicular to an extension direction of the first extension portion 331. The abutment surface 3321 is parallel to the X-direction and is connected to the second side surface 3312. One end of the inclined surface 3322 is connected to the contact surface 3321, and the other end extends toward the first extending portion 331. When the clamping portion 33 moves towards the fixing piece 120, the inclined surface 3322 plays a guiding role, so that the clamping portion 33 can enter the locking space 1204 of the fixing piece 120.

The engaging portion 33 is fixedly connected to the body 32. One end of the first extending portion 331 facing away from the second extending portion 332 is fixedly connected to the second side 304 of the body 32. The extending direction of the first extending portion 331 is parallel to the Z direction, and the extending direction of the second extending portion 332 is parallel to the X direction. The abutting surface 3321 of the second extension 332 faces the main body 32 and is spaced apart from the second side surface 304. When the body 32 moves relative to the rotating assembly 20, the clamping portion 33 is driven to move synchronously with the body 32.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view of the locking device 100 shown in fig. 4.

The lock cover 31 is provided with an accommodating space 311. The accommodating space 311 includes a first opening 312, and the first opening 312 is disposed on the bottom wall of the lock cover 31. The side wall of the locking cap 31 is provided with an auxiliary chute 313. The lock cover 31 is covered on the outer periphery of the body 32, the body 32 is located in the accommodating space 311, the auxiliary chute 313 is arranged corresponding to the chute 322, and the rotating block 23 passes through the chute 322 and the auxiliary chute 313 and extends out of the lock assembly 30. The clamping portion 33 passes through the first opening 312, and extends out of the accommodating space 311 from the first opening 312. In the present embodiment, the size of the accommodating space 311 is larger than the size of the body 32, and the body 32 can move in the Z direction and the X direction in the accommodating space 311. In this embodiment, the lock cover 31 can limit the movement of the body 32, so that the body 32 can be prevented from swinging in the Y direction.

The locking cover 31 is fixedly mounted on the fixing frame 10 and is positioned on one side of the fixing plate 11 away from the driving handle 21. In this embodiment, the lock cover 31 is fixedly connected to the fixing frame 10 by a screw. In other embodiments, the locking cap 31 may be fixedly coupled to the fixing frame 10 in other manners. The latch hook 2 is mounted on the rotating shaft 22, and is slidably and rotatably connected with the rotating shaft 22. The rotating shaft 22 is located in the waist hole 321 of the body 32, the rotation axis of the rotating shaft 22 is parallel to and spaced from the geometric center line of the waist hole 321, and the clamping portion 33 extends toward the negative Z-axis direction. The latch hook 2 is slidable along the axial direction (X direction) of the rotation shaft 22, and the rotation shaft 22 is rotatable in the waist hole 321. The rotating block 23 is located in the sliding groove 322, and the rotating block 23 can slide in the sliding groove 322. When the driving handle 21 rotates, the rotating shaft 22 is driven to rotate in the waist hole 321, so as to drive the rotating block 23 to slide in the sliding groove 322, thereby driving the body 32 to move in the X direction or/and the Z direction in the lock cover 31, and driving the clamping part 33 to move in the X direction or/and the Z direction.

When the rotating block 23 is located in the first chute 323, an acting force parallel to the X direction is applied to the clamping portion 33, so that the body 32 can be driven to move along the rotating shaft 22 in the X direction, and the rotating block 23 can be driven to move in the first chute 323, so as to drive the latch hook 2 to move in the Z direction. When the driving handle 21 is rotated clockwise ω1, the rotating shaft 22 rotates clockwise ω1, the rotating block 23 slides from the first chute 323 to the second chute 324, and slides in the second chute 324 towards the first limiting wall 325, so that the geometric center line of the rotating shaft 22 moves towards the positive direction of the Z axis, and further drives the latch hook 2 to move towards the positive direction of the Z axis. When the driving handle 21 is rotated anticlockwise ω2, the rotating shaft 22 rotates anticlockwise ω2, the rotating block 23 slides to the first sliding groove 323 from the second sliding groove 324 of the sliding groove 322, and slides in the first sliding groove 323 towards the second limiting wall 326, so that the geometric center line of the rotating shaft 22 moves towards the negative direction of the Z axis, and the latch hook 2 is driven to move towards the negative direction of the Z axis.

Referring to fig. 5, the locking device 100 further includes an elastic member 40, and in this embodiment, the elastic member 40 is a spring. In other embodiments, the elastic member 40 may be other elastic materials. The elastic member 40 is installed between the fixing frame 10 and the clamping portion 33. One end of the elastic member 40 is fixedly connected with the clamping portion 33, and the other end is fixedly connected with the fixing frame 10. The elastic extension direction of the elastic member 40 is parallel to the X direction. When the engaging portion 33 receives a force in the positive X-axis direction and moves in the positive X-axis direction, that is, when the engaging portion 33 moves in the direction of the fixing frame 10, the elastic member 40 compresses and generates an elastic restoring force. When the external force applied to the clamping portion 33 is removed, the elastic member 40 elastically returns to drive the clamping portion 33 to move toward the positive X-axis direction.

Referring to fig. 4 to 6, the reset element 50 is fixedly connected to the locking assembly 30. The reset element 50 includes a protective case 51, a reset body 52, and an elastic body 53. The protective case 51 is provided with a guide groove 511. The guide groove 511 includes a second opening 512. The second opening 512 is provided at one end of the guide groove 511 and communicates with the guide groove 511. The bottom wall of the protective case 51 is provided with a through hole 513. The through hole 513 is located at an end of the guide groove 511 remote from the second opening 512, and communicates with the guide groove 511. The protective housing 51 is fixedly mounted on the top of the lock cover 31, the extending direction of the guiding slot 511 is parallel to the Y direction, and the second opening 512 of the guiding slot 511 faces the auxiliary chute 313.

The reset body 52 is a long column structure. The reset body 52 includes a holding portion 54, a sliding portion 55, and a limiting portion 56. The supporting portion 54 and the limiting portion 56 are respectively connected to opposite ends of the sliding portion 55, and are fixedly connected to the sliding portion 55. The radial dimensions of the abutting portion 54 and the stopper portion 56 are larger than the radial dimensions of the sliding portion 55. The reset body 52 is mounted to the guide groove 511 and is slidable along the guide groove 511. The abutting portion 54 is located in the guide groove 511, the sliding portion 55 extends out of the guide groove 511 through the through hole 513, and the limiting portion 56 is located out of the guide groove 511.

In this embodiment, the elastic body 53 is a spring. In other embodiments, the elastomer 53 may be other elastic materials. The elastic body 53 is installed in the guide groove 511. The elastic body 53 is sleeved on the outer peripheral side of the sliding portion 55, and one end of the elastic body 53 abuts against the abutting portion 54, and the other end abuts against the bottom wall of the protective case 51. The elastic extension direction of the elastic body 53 is parallel to the Y direction. That is, the elastic extension direction of the elastic body 53 coincides with the extension direction of the guide groove 511 and the extension direction of the sliding portion 55.

When the rotating block 23 is moved along the direction of the first chute 323 toward the second limiting wall 326 by the force of the rotating shaft 22 or the body 32, the rotating block 23 abuts against the abutting portion 54, and moves the abutting portion 54 toward the bottom wall of the protective housing 51, so as to drive the sliding portion 55 to move toward the negative Y-axis direction, and compress the elastic body 53, so that the elastic body 53 has an elastic restoring force. When the acting force of the rotating shaft 22 or the body 32 on the rotating block 23 is eliminated, the elastic body 53 elastically returns to apply the acting force towards the second opening 512 to the abutting portion 54, and drives the reset body 52 to move towards the positive Y-axis direction along the guiding slot 511, and the abutting portion 54 abuts against the rotating block 23 to move the rotating block 23 towards the direction away from the second limiting wall 326 along the first sliding slot 323, so as to drive the latch hook 2 to move towards the negative X-axis direction. Meanwhile, when the reset body 52 moves along the guide groove 511 in the Y-axis positive direction, the stopper 56 moves in a direction approaching the protective case 51 and abuts against the bottom wall of the protective case 51.

In this embodiment, by setting the reset element 50 and driving the rotating block 23 to rotate by the elastic restoring force of the reset element 50, the rotating block 23 can be restored to the position perpendicular to the Z axis, and meanwhile, the latch hook 2 can be moved towards the negative direction of the X axis, so as to realize automatic reset of the latch hook 2. When the stopper 56 is provided on the restoring member 50 and the elastic body 53 returns to the natural state, the stopper 56 abuts against the bottom wall of the protective case 51, so that the restoring body 52 can be prevented from being pulled out of the protective case 51 by continuing to move in the Y-axis forward direction.

Referring to fig. 1 and 7, fig. 7 is a schematic view of a portion of the infusion device 200 shown in fig. 1 in an initial state.

When the infusion apparatus 200 is in the initial state, the support 130 has an opening angle with respect to the case 110, and the included angle between the support 130 and the top plate 1101 of the case 110 is greater than 0 degrees, the inclined surface 3322 of the clamping portion 33 abuts against the connecting post 1203 of the fixing member 120, and the elastic member 40 and the elastic body 53 of the reset member 50 are both in a pre-compressed state. It should be explained that the pre-compressed state may be a natural state or a compressed state. The rotating block 23 is located in the first chute 323, and the extending direction of the rotating block 23 is parallel to the Z direction.

Referring to fig. 8, fig. 8 is a schematic diagram illustrating a closed state of the infusion device 200 shown in fig. 1.

When the infusion device 200 is in the initial state, the bracket 130 is turned towards the direction of the box body 110, so that the included angle between the bracket 130 and the top plate 1101 of the box body 110 is gradually reduced. The connecting post 1203 of the fixing member 120 abuts against the inclined surface 3322, so that the clamping portion 33 moves towards the positive direction of the X axis, and compresses the elastic member 40, thereby driving the body 32 to move towards the positive direction of the X axis along the rotating shaft 22, the body 32 applies a force to the rotating block 23, so that the rotating block 23 slides towards the second limiting wall 326 along the first sliding groove 323, abuts against the reset body 52, and the reset body 52 moves towards the negative direction of the Y axis, so that the elastic body 53 is compressed, and the elastic body 53 is in a compressed state. The rotating block 23 slides towards the second limiting wall 326 and drives the rotating shaft 22 to rotate anticlockwise omega 2, so that the clamping part 33 moves towards the negative Z-axis direction.

The bracket 130 is continuously rotated toward the box 110, so that the clamping portion 33 continuously moves toward the negative Z-axis direction and the positive X-axis direction until the second extending portion 332 of the clamping portion 33 is dislocated from the connecting post 1203 and faces the locking space 1204. The force of the fixing member 120 on the second extending portion 332 is removed, the elastic member 40 elastically returns to the natural state, and abuts against the clamping portion 33 towards the negative X-axis direction, so that the clamping portion 33 moves towards the negative X-axis direction, and drives the body 32 to move towards the negative X-axis direction. Meanwhile, the elastic body 53 of the reset element 50 elastically returns to the natural state, the reset element 50 moves towards the negative Y-axis direction and abuts against the rotating block 23, so that the rotating block 23 moves along the first chute 323 towards the direction away from the second limiting wall 326 until the rotating block 23 is parallel to the Z-direction and abuts against the body 32, so that the body 32 moves towards the negative X-axis direction and drives the clamping part 33 to move towards the negative X-axis direction, and the first extension part 331 moves into the locking space 1204, preassembling of the infusion device 200 is completed, and the infusion device 200 is switched from the initial state to the closed state.

When the infusion device 200 is in the closed state, the bracket 130 is closed relative to the box body 110, the top plate 1101 of the box body 110 of the bracket 130 is approximately parallel, and the second extension portion 332 of the clamping portion 33 is located in the locking space 1204 of the fixing member 120. The elastic body 53 of the elastic member 40 and the restoring member 50 is in a natural state. The rotating block 23 is located in the first chute 323, and the extending direction of the rotating block 23 is parallel to the Z direction. The infusion set 200 is completely preloaded, and when the cassette body 110 of the medicine cassette 1 is released, the cassette body 110 does not fall off the support 130.

In this embodiment, by providing the reset element 50 and the elastic element 40, when the locking device 100 is switched from the initial state to the closed state, the reset element 50 and the elastic element 40 can drive the latch hook 2 to move towards the negative direction of the X-axis together by the elastic restoring force, so that the latch hook 2 and the fixing element 120 are locked, the preassembly of the infusion device 200 is completed, the infusion device 200 is switched to the closed state, and the box body 110 of the medicine box 1 cannot fall from the bracket 130 when the box body 110 is released. In addition, the reset piece 50 and the elastic piece 40 are arranged, so that the infusion device 200 is more convenient and quick to install, and meanwhile, the structure of the infusion device 200 is simplified.

Referring to fig. 8 and 9 together, fig. 9 is a schematic view illustrating a locked state of the infusion device 200 shown in fig. 1.

When the infusion device 200 is in the closed state, the driving handle 21 is rotated clockwise ω1 to drive the rotating shaft 22 to rotate clockwise ω1, so as to drive the rotating block 23 to rotate from the first sliding groove 323 to the second sliding groove 324, and slide in the direction of the second sliding groove 324 towards the first limiting wall 325. Meanwhile, when the rotating shaft 22 rotates clockwise ω1, the geometric center line of the rotating shaft 22 moves towards the positive Z-axis direction, so as to drive the latch hook 2 to move towards the positive Z-axis direction, so as to drive the second extension portion 332 of the clamping portion 33 to move towards the connecting post 1203, and make the abutting surface 3321 abut against the connecting post 1203, thereby switching the infusion device 200 from the closed state to the locked state (as shown in fig. 9). When the infusion device 200 is in the locked state, the rotating block 23 is located in the first chute 323, the extending direction of the rotating block 23 is parallel to the Y direction, and the clamping portion 33 is locked with the fixing member 120.

In one embodiment, the material of the engaging portion 33 is different from the material of the fixing member 120. In this embodiment, the fixing member 120 is a plastic member, and the clamping portion 33 is a metal member. When the infusion apparatus 200 is in the locked state, the second extension portion 332 of the locking assembly 30 is located in the locking space 1204 of the fixing member 120, and the second extension portion 332 is in interference fit with the connection post 1203, so as to improve the stability of connection between the clamping portion 33 and the fixing member 120, and reduce the requirement on machining precision. It should be noted that, the materials of the fixing member 120 and the clamping portion 33 are different, so that the hardness is different, and when the clamping portion 33 applies a force to the fixing member 120, the fixing member 120 can be deformed, so that the interference fit between the clamping portion 33 and the fixing member 120 can be realized.

In this embodiment, the rotation of the rotation shaft 22 is driven by the rotation of the driving handle 21, so that the clamping portion 33 can be driven to move along the Z direction, so that the clamping portion 33 is locked with the fixing member 120, the locking of the infusion device 200 is realized, the support 130 is stably connected with the box 110, and therefore the stability and reliability of the connection between the infusion pump 140 and the box 110 can be improved, the infusion pump 140 can stably drive the medicine in the infusion tube to flow, and the infusion precision is improved. In addition, the locking device 100 and the infusion box provided by the embodiment have simple structure, are easy to assemble and disassemble, are easy to lock, and can improve the use experience of users.

Referring to fig. 9 and 10, fig. 10 is a schematic view of the infusion device 200 shown in fig. 1 in an open state.

When the infusion device 200 is in the locked state, the driving handle 21 is rotated anticlockwise ω2, the rotating shaft 22 is driven to rotate anticlockwise ω2, and the rotating block 23 slides along the second sliding groove 324 towards a direction away from the first limiting wall 325. When the rotating shaft 22 rotates anticlockwise ω2, the geometric center line of the rotating shaft 22 moves towards the negative Z-axis direction, so as to drive the body 32 and the clamping portion 33 to move towards the negative Z-axis direction, so as to drive the second extension portion 332 to move towards the direction away from the connecting post 1203, and the clamping portion 33 releases the connecting post 1203, thereby unlocking the infusion apparatus 200. And the driving handle is continuously rotated anticlockwise ω2 to drive the rotating shaft 22 to rotate anticlockwise ω2, and the rotating block 23 slides to the first sliding groove 323 and slides in the first sliding groove 323 towards the second limiting wall 326, so that the body 32 and the clamping portion 33 are driven to move towards the negative Z-axis direction and the positive X-axis direction simultaneously, and the first extension portion 331 of the clamping portion 33 is further moved out of the locking space 1204 and separated from the fixing piece 120. Meanwhile, when the clamping part 33 moves towards the positive direction of the X axis, the elastic piece 40 is compressed, so that the elastic piece 40 is in a compressed state; when the rotation block 23 slides toward the second limiting wall 326, the reset body 52 is abutted against, so that the reset body 52 moves toward the negative Y-axis direction, the elastic body 53 is compressed, the elastic body 53 is in a compressed state, and the infusion device 200 is switched from the closed state to the open state (as shown in fig. 10).

When the infusion device 200 is in the open state, the bracket 130 has an opening angle relative to the box body 110, the clamping part 33 is separated from the fixing part 120, the elastic part 40 is in the compressed state, the rotating block 23 abuts against the reset body 52, and the elastic body 53 is in the compressed state.

In this embodiment, the driving handle 21 is rotated anticlockwise ω2 to drive the rotating shaft 22 to rotate, so as to drive the latch hook 2 to move towards the negative direction of the Z axis and the positive direction of the X axis, to unlock the clamping portion 33 and the fixing piece 120, and to move the second extension body out of the locking space 1204, so as to switch the infusion apparatus 200 to the open state, and further to enable the case 110 of the drug case 1 to be smoothly taken out from the bracket 130, so as to detach the drug case 1.

Referring to fig. 1 and 10, when the infusion apparatus 200 is in an open state, the locking device 100 is unlocked from the fixing member 120, and after the driving handle is released, the external force applied to the locking device 100 is removed, the elastic member 40 elastically returns to a natural state, and abuts against the clamping portion 33 towards the negative X-axis direction, so that the clamping portion 33 moves towards the negative X-axis direction, and drives the latch hook 2 to move towards the negative X-axis direction. Meanwhile, the elastic body 53 of the reset element 50 elastically returns to the natural state, the reset element 50 moves towards the negative direction of the Y axis and abuts against the rotating block 23, so that the rotating block 23 moves along the first sliding groove 323 towards the direction away from the second limiting wall 326 until the rotating block 23 is parallel to the Z direction and abuts against the body 32, so that the body 32 moves towards the negative direction of the X axis and drives the clamping portion 33 to move towards the negative direction of the X axis, and the infusion device 200 returns to the initial state (as shown in fig. 1).

The above actions are repeated, so that the infusion device 200 can be switched among an initial state, a closed state, a locking state and an open state, thereby realizing the disassembly, the installation and the locking of the infusion device 200.

In this embodiment, by setting the locking device 100, the locking of the infusion device 200 can be achieved, so that the bracket 130 is stably connected with the box body 110, and thus the stability and reliability of connection between the infusion pump 140 and the box body 110 can be improved, the infusion pump 140 can stably drive the flow of the medicine in the infusion tube, and the infusion precision is improved. In addition, in the embodiment, the locking device 100 and the fixing member 120 can be unlocked by rotating the rotating shaft 22 in the locking device 100, so as to realize the disassembly of the box body 110, and the device is convenient to use and simple in structure.

Meanwhile, in this embodiment, the reset piece 50 is provided, and the rotating block 23 is driven to rotate by the elastic restoring force of the reset piece 50, so that the latch hook 2 is driven to move, so that the latch hook 2 is locked with the fixing piece 120, and the infusion device 200 can be switched to a closed state, and the preassembling of the medicine box 1 is completed, so that the installation mode of the infusion device 200 is simplified, the use experience of a user is improved, and meanwhile, the structure of the infusion device 200 is simplified. In addition, in this embodiment, by setting the reset element 50, the infusion device 200 can be automatically switched from the open state to the initial state, so as to facilitate the next installation of the infusion device 200, and further facilitate the use of the user.

The above is only a part of examples and embodiments of the present application, and the scope of the present application is not limited thereto, and any person skilled in the art who is familiar with the technical scope of the present application can easily think about the changes or substitutions, and all the changes or substitutions are covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (14)

1. A locking device which is applied to a medicine box, wherein the medicine box comprises a fixing piece, and is characterized in that the locking device comprises a rotating component, a locking hook and a resetting piece,

the lock hook comprises a body and a clamping part, the body is fixedly connected with the clamping part, the clamping part extends towards the direction of the fixing piece, and the clamping part is used for being locked with the fixing piece;

the rotating assembly comprises a rotating shaft and a rotating block, and the rotating block is convexly arranged on the axial side wall of the rotating shaft; the rotating shaft is rotationally connected with the body, the rotating block is rotationally connected with the body, and the rotating shaft can drive the rotating block to rotate relative to the body so that the rotating block drives the body to axially slide along the rotating shaft;

the reset piece is arranged on the body and positioned on the rotating path of the rotating block, and the elastic compression direction of the reset piece is perpendicular to the axial direction of the rotating shaft;

When the body moves along the first direction, the rotating block is driven to rotate towards the resetting piece and prop against the resetting piece, so that the resetting piece is elastically compressed and generates elastic restoring force, and the elastic restoring force can drive the rotating block to rotate towards the direction away from the resetting piece so as to drive the body to move along the second direction; the first direction and the second direction are parallel to the axial direction of the rotating shaft and are opposite to each other.

2. The locking device of claim 1, wherein the locking device comprises an initial state and a closed state;

when the locking device is in the initial state, the reset piece is in a precompressed state;

when the locking device and/or the fixing piece move relative to each other, the fixing piece abuts against the clamping part, and the locking hook moves along the first direction so as to drive the rotating block to abut against and compress the reset piece; when the clamping part enters the locking space of the fixing piece, the reset piece elastically returns to drive the rotating block to rotate in the direction away from the reset piece, and the lock hook moves in the second direction, so that the clamping part moves towards the fixing piece and is locked with the fixing piece, and the locking device is in the closed state.

3. The locking device of claim 2, further comprising an open state, wherein when the locking device is in the open state, the clamping portion is unlocked from the fixing member, the rotating block abuts against and compresses the reset member, and the reset member elastically returns to drive the rotating block to rotate in a direction away from the reset member, and returns the reset member to the pre-compressed state, so that the locking device is in the initial state.

4. A locking device as claimed in claim 3, wherein the reset member comprises a protective shell, a reset body and an elastomer;

the protective shell is provided with a guide groove, the bottom wall of the protective shell is provided with a through hole, and the through hole is communicated with the guide groove and is positioned at one end of the guide groove;

the resetting body comprises a propping part and a sliding part, the propping part is fixedly connected with the sliding part, and the outer diameter of the propping part is larger than that of the sliding part;

the supporting part is positioned in the guide groove, one end of the sliding part, which is far away from the supporting part, extends out of the guide groove from the through hole, the elastic body is positioned in the guide groove, and the opposite ends of the elastic body respectively support the supporting part and the bottom wall; when the rotating block moves towards the direction of the resetting piece, the rotating block props against the propping part to compress the elastic body and enable the elastic body to generate elastic restoring force.

5. The locking device according to claim 4, wherein the reset body further comprises a limiting portion fixed to an end of the sliding portion away from the abutting portion, and an outer diameter of the limiting portion is larger than an outer diameter of the sliding portion; the limiting part is positioned outside the guide groove, and when the elastic body is elastically restored, the limiting part abuts against the bottom wall.

6. The locking device of claim 4, wherein the body comprises a first surface, a second surface, and a side surface, the first surface and the second surface being disposed opposite one another, the side surface being connected between the first surface and the second surface; the body is provided with a waist hole, the waist hole penetrates through the first surface and the second surface, and the rotating shaft is installed in the waist hole.

7. The locking device according to claim 6, wherein the rotation axis of the rotation shaft is parallel to and spaced from the geometric center line of the waist hole, and the rotation shaft is rotated to move the geometric center line of the waist hole in a direction away from the clamping portion, so as to drive the clamping portion to move in a direction approaching to the rotation shaft and to be clamped and locked with the fixing member; the rotating shaft is rotated to enable the geometric center line of the waist hole to move towards the direction close to the clamping part, and the clamping part can be driven to move towards the direction far away from the rotating shaft and separate from the fixing piece for unlocking.

8. The locking device of claim 7, wherein the side surface comprises a first side surface and a second side surface, the first side surface and the second side surface being disposed opposite and connected between the first surface and the second surface, the clip being perpendicularly connected to the second side surface; the first side surface is provided with a first chute, the extending direction of the first chute is intersected with the extending direction of the first side surface, and the first chute is communicated with the waist hole; when the rotating block slides along the first sliding groove, the rotating block props against the side wall of the first sliding groove so as to drive the body to slide along the axial direction of the rotating shaft.

9. The locking device of claim 8, wherein the side surface further comprises a third side surface, the third side surface is vertically connected between the first side surface and the second side surface, the third side surface is provided with a second sliding groove, the extending direction of the second sliding groove is consistent with that of the second side surface, the second sliding groove is communicated with the first sliding groove and the waist hole, the rotating shaft rotates to drive the rotating block to slide along the second sliding groove in a direction away from the first sliding groove, the clamping portion can be driven to move towards a direction close to the rotating shaft, the rotating shaft rotates to drive the rotating block to slide along the second sliding groove in a direction close to the first sliding groove, and the clamping portion can be driven to move towards a direction away from the rotating shaft.

10. The locking device of claim 1, wherein the shackle further comprises a protective shell, the protective shell is sleeved on the outer peripheral side of the body, and the body is movable in the protective shell along the axial direction and the radial direction of the rotating shaft; the locking device further comprises a fixing frame, and the protective shell is fixed on the fixing frame.

11. The locking device according to claim 10, further comprising an elastic member, wherein one end of the elastic member is fixedly connected to the fixing frame, the other end of the elastic member is fixedly connected to the locking portion, an elastic compression direction of the elastic member is parallel to an axial direction of the rotating shaft, and the locking portion compresses or releases the elastic member when the locking hook moves along the axial direction of the rotating shaft.

12. The locking device of claim 1, wherein the locking portion comprises a first extension body and a second extension body, the first extension body is fixedly connected with the body and extends towards a direction away from the body, the second extension body is connected with the first extension body at an included angle, the second extension body comprises a bevel, the bevel is inclined towards one end of the first extension body facing away from the body, and the bevel is used for supporting the fixing piece.

13. A pharmaceutical cassette comprising a cassette body, a securing member, a support and a locking device according to any one of claims 1 to 12, said securing member being fixedly connected to said cassette body, said support being rotatably connected to said cassette body, and said support and said securing member being located on the same side of said cassette body, said locking device being secured to said support.

14. A portable infusion device, comprising an infusion pump, an infusion tube and the drug cassette of claim 13, wherein the infusion pump is fixedly connected with a bracket of the drug cassette; one end of the infusion tube is communicated with the medicine box, the other end of the infusion tube is used for being connected with a patient, and the infusion pump is arranged on the path of the infusion tube so as to drive the medicine liquid in the infusion tube to flow.

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