Locking structure of infusion pump and infusion pump

Abstract

The utility model belongs to the technical field of infusion pumps, in particular to a locking structure of an infusion pump, which is used for locking a pump body and a medicine box of the infusion pump, the locking structure comprises an unlocking tool and a locking part arranged in the pump body, the pump body is provided with a pump body insertion hole, the unlocking tool can be inserted into the locking part, and the locking part is inserted into the pump body insertion hole. The locking part comprises a telescopic pin and a fixed cover, the telescopic pin can relatively move along the fixed cover, the telescopic pin comprises an elastic piece and a pin piece, a guide groove corresponding to the pin piece is formed in the fixed cover, and a guide block is arranged at the position, corresponding to the pump body insertion hole, of the locking part. The pump body is used for locking the handle and the lock hook, the medicine box can be conveniently, rapidly and preliminarily fixed, then the pump body and the medicine box can be automatically locked by additionally arranging the built-in locking mechanism, and clinical accidents such as out-of-control infusion and blood return caused by unlocking are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of infusion pumps, in particular to a locking structure of an infusion pump and an infusion pump. Background Art

[0002] At present, a portable electric infusion pump is mainly used in places such as postoperative pain, chemotherapy, and painless childbirth. The common fully portable infusion pump is mainly composed of two parts: a driving device and a medicine box. The driving device controls the periodic movement of the moving parts, and the medicine box carries the medicine to be delivered. By controlling the gap between the driving device and the medicine box, the driving device periodically crushes the infusion tube of the medicine box to achieve periodic automatic infusion.

[0003] Among them, the Chinese patent application number is: 2023220093234, and the patent name is: A device combining a medicine box and a pump body and an electric infusion pump, wherein the driving device and the medicine box are buckled together by the left and right hands. During use, if the medical staff or the patient accidentally opens the left and right hands, the infusion pump will not work, resulting in serious consequences of blood backflow to the patient.

[0004] Most of the existing locking technologies have insufficiently compact locking solutions and occupy a large amount of internal and external space, or the locking mechanism is overly exposed. The human-computer interaction design easily induces non-medical personnel to try to open it, or some cases require adding locking structures to both sides at the same time, which is overly cumbersome. In addition, some solutions may still be able to be opened without tools. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a locking structure for an infusion pump, which has the advantages of simple structure and easy use, and solves the problems mentioned in the above background technology.

[0006] The utility model provides the following technical solutions: A locking structure of an infusion pump, used to lock a pump body and a medicine box of the infusion pump, the locking structure comprising an unlocking tool and a locking portion arranged in the pump body, the pump body is provided with a pump body socket, the shape of the pump body socket is adapted to the unlocking tool, the unlocking tool can pass through the pump body socket and be inserted into the locking portion, the locking portion comprises a telescopic pin and a fixed cover, the telescopic pin can move relative to the fixed cover, the telescopic pin comprises an elastic member and a pin member, the fixed cover is provided with a guide groove corresponding to the pin member, and guide blocks are provided at positions corresponding to the locking portion and the pump body socket.

[0007] One end of the elastic member is connected to the inner wall of the upper shell of the pump body, and the other end is connected to the pin. When the unlocking tool is inserted, as the unlocking tool is gradually inserted, the pin will move away from the medicine box and the elastic member will be compressed.

[0008] The pin member includes a base, the upper surface of the base is connected to the elastic member, the lower surface of the base is provided with a guide pin, the end of the guide pin away from the base is a pin head, the pin head moves along the direction of the initial installation of the pump body and the medicine box, and the height of the pin head increases. In coordination with the movement, the telescopic pin is automatically pressed down during installation, and after the movement is in place, the telescopic pin is fully restored, and the pump body and the medicine box can be stuck in coordination with the height change of the pin head.

[0009] There are two guide pins, which are symmetrically distributed on the base. The base is also provided with two longitudinal ribs, which are arranged between the two guide pins. They are used to limit the position of the unlocking tool in the lock part to prevent it from shaking in the lock part. The axis of the longitudinal rib is perpendicular to the line connecting the two guide pins. They are used to limit the position of the unlocking tool in the lock part to prevent it from shaking in the lock part.

[0010] The guide block is arranged on the base, and the side of the guide block close to the pump body insertion hole is a slope block.

[0011] The height of the longitudinal rib is smaller than that of the guide pin, and when the unlocking tool is not inserted, the free end of the longitudinal rib cannot protrude from the lower surface of the pump body.

[0012] The guide groove includes a transverse guide groove and a longitudinal guide groove. The transverse guide groove is matched with the guide pin to allow the guide pin to move up and down along the transverse guide groove. The longitudinal guide groove is matched with the longitudinal rib.

[0013] The guide groove passes through the fixing cover, and fixing lugs are arranged on both side walls of the fixing cover. The fixing cover is connected to the pump body through the fixing lugs by locking screws.

[0014] The guide block also includes a plane block. When the unlocking tool is inserted, it is located behind the inclined block. The unlocking tool includes a plug-in end, a plug-in body and a holding portion. The plug-in end is an inclined surface, which is convenient for insertion between the pin and the fixed cover. The upper surface of the plug-in body and the lower surface of the plane block are adapted and abutted.

[0015] An infusion pump comprises a locking structure of any of the above-mentioned infusion pumps, wherein the pump body comprises an upper shell and a lower shell, the lower shell is provided with a first through groove for the pin to move up and down, a medicine box locking hole is provided at a corresponding position on the upper surface of the medicine box for cooperating with the pin to achieve locking, locking levers are provided on both sides of the pump body to cooperate with the front and rear locking grooves of the medicine box to quickly lock the two parts front and back, and the connection between the medicine box and the pump body is achieved through upper and lower locking holes and upper and lower locking hooks on the surfaces where the medicine box and the pump body abut each other.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model designs a locking structure of an infusion pump and an infusion pump, which can automatically lock the pump body and the medicine box by adding a built-in locking mechanism of the device. Even if the medicine box and the pump body are operated incorrectly, the medicine box and the pump body cannot be unlocked, and a specially designed key tool needs to be inserted into the lock hole at the rear of the pump body to unlock it again, thereby avoiding clinical accidents such as uncontrolled infusion and blood return caused by improper unlocking. Since the core locking structure is a built-in design, it avoids misleading non-professionals to possibly use reverse force to pry the exposed lock buckle, which may cause the exposed structure of the equipment to be damaged, reduces the risk of misoperation during human-machine interaction caused by the exposed locking structure, and reduces the burden of after-sales maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a pump body and a medicine box separated from each other in a specific embodiment 1 of the utility model;

[0019] Figure 2 It is an exploded stereoscopic schematic diagram of a locking structure of an infusion pump in a specific embodiment 1 of the utility model from a first perspective;

[0020] Figure 3 This is a schematic cross-sectional view of a locking structure of an infusion pump in a specific embodiment 1 of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the unlocking tool and the pump body in the infusion pump in the position ready for installation from a bottom-up angle according to the specific embodiment 1 of the utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the unlocking tool and the pump body in the infusion pump in the top view of the specific embodiment 1 of the utility model, ready for installation;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of a specific embodiment 1 of the utility model, in which an infusion pump and an unlocking tool are used together, from (a) aligning the unlocking tool with the pump body plug hole - (b) opening the locking levers on both sides of the pump body - (c) completely separating the medicine box and the pump body;

[0024] Figure 7 It is an exploded stereoscopic schematic diagram of a locking structure of an infusion pump according to a specific embodiment 1 of the utility model from a second perspective.

[0025] In the figure: 1. pump body; 2. medicine box;

[0026] 3. Fixed cover; 31. Guide groove; 32. Fixed lug; 33. Locking screw; 311. Horizontal guide groove; 312. Longitudinal guide groove;

[0027] 4. telescopic pin; 41. pin member; 42. elastic member;

[0028] 411, base; 412, guide pin; 413, longitudinal rib; 414, guide block; 4141, inclined block; 4142, plane block;

[0029] 5. Unlocking tool; 51. Plug-in; 52. Holding portion; 53. Stopper; 511. Plug-in end; 512. Plug-in body.

[0030] 6. Pump body plug hole; 7. First through slot; 8. Medicine box lock hole; 9. Upper and lower lock holes; 10. Upper and lower lock hooks; 11. Locking lever. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Most of the existing technologies are solutions that combine upper and lower parts, and are locked and fixed by using two hanging ears.

[0033] Specific embodiment 1: Please refer to Figure 1-7 ,like Figure 1 As shown, Figure 1 In order to explode the infusion pump into two parts, the pump body 1 and the medicine box 2, the lower bottom surface of the pump body 1 and the upper top surface of the medicine box 2 are shown. Figure 2 It is a schematic diagram of the explosion of the locking structure of pump body 1.

[0034] A locking structure of an infusion pump, used to lock a pump body 1 and a medicine box 2 of the infusion pump, the locking structure comprising an unlocking tool 5 and a locking portion arranged in the pump body 1, the pump body 1 is provided with a pump body jack 6, the shape of the pump body jack 6 is adapted to the unlocking tool 5, the unlocking tool 5 can penetrate the pump body jack 6 and be inserted into the locking portion, the unlocking tool 5 comprises a front end plug-in 51, a holding portion 52 and a stopper 53 therebetween, the plug-in 51 is used to be inserted into the pump body jack 6, causing the telescopic pin 4 to move to achieve unlocking, the holding portion 52 is used for the user to grasp, and the stopper 53 is used to limit the length of the plug-in 51 inserted into the pump body 1 The plug-in 51 includes a plug-in end 511 and a plug-in body 512. The plug-in end 511 is used to first insert into the locking structure to facilitate insertion between the pin and the fixed cover 3, and is used to open or increase the distance between the fixed cover 3 and the telescopic pin 4. In this specific embodiment, the plug-in end 511 is provided with an inclined surface. The locking portion includes a telescopic pin 4 and a fixed cover 3. The telescopic pin 4 can move relatively along the fixed cover 3. The telescopic pin 4 includes an elastic member 42 and a pin 41. A guide groove 31 corresponding to the pin 41 is provided on the fixed cover 3. A guide block 414 is provided at a position corresponding to the locking portion and the pump body socket 6.

[0035] One end of the elastic member 42 is connected to the inner wall of the upper shell of the pump body 1, and the other end is connected to the pin member 41. When the unlocking tool 5 is inserted, as the unlocking tool 5 is gradually inserted, the pin member 41 moves away from the medicine box 2, and the elastic member 42 is compressed. The elastic member 42 in this specific embodiment uses a spring.

[0036] The pin 41 includes a base 411, the upper surface of the base 411 is connected to the elastic member 42, and the lower surface of the base 411 is provided with a guide pin 412, and the end of the guide pin 412 away from the base 411 is a pin head, and the height of the pin head increases along the movement direction of the pump body 1 and the medicine box 2 when they are first installed. In coordination with the movement, during installation, the telescopic pin 4 will be automatically pressed into the lower shell of the pump body 1 by the top surface of the medicine box 2. After moving to the right position, that is, after being installed in place, the telescopic pin 4 will automatically pop out by the spring force of the elastic member 42 and be inserted into the medicine box lock hole 8. In coordination with the height change of the pin head, the pump body 1 and the medicine box 2 can be stuck, and the medicine box 2 and the pump body 1 are automatically locked. In this specific embodiment, the connection between the upper surface of the base 411 and the elastic member 42 is that the upper surface of the base 411 is provided with a connecting groove for connecting the elastic member 42.

[0037] There are two guide pins 412, which are symmetrically distributed on the base 411. The base 411 is also provided with two longitudinal ribs 413, and the longitudinal ribs 413 are arranged between the two guide pins 412. It is used to limit the position of the unlocking tool 5 in the lock part to prevent it from shaking in the lock part. The axis of the longitudinal rib 413 is perpendicular to the line connecting the two guide pins 412. The guide pin 412 cannot be too wide, and cannot directly play the same effect as the longitudinal rib 413. If there is no longitudinal rib 413, the width of the guide pin 412 is used alone to limit the unlocking tool 5 to prevent shaking. Because the width of the guide pin 412 cannot be too large, the contact area between the guide pin 412 and the unlocking tool 5 in the width direction is limited, and it only contacts a part of the unlocking tool 5, and the limiting effect will be poor. If the width of the guide pin 412 is too large, the inclination of the pin head of the guide pin 412 must be ensured to play a role. If the inclination angle of the pin head is the same, the height will inevitably increase. When the pin head needs to be completely immersed in the pump body 1, the displacement required for extension or movement becomes larger, the size of the pump body socket 6 also needs to be changed, and the shape of the insertion part of the unlocking tool 5 also needs to be changed. It can still be used, but it will affect the appearance and actual use experience.

[0038] The guide block 414 is disposed on the base 411 , and a side of the guide block 414 close to the pump body insertion hole 6 is a slope block 4141 .

[0039] The height of the longitudinal rib 413 is smaller than the guide pin 412. The main function of the longitudinal rib 413 is to limit the position of the unlocking tool 5 in the locking structure to avoid shaking. It is of little significance if the height exceeds or is equal to the guide pin 412. In this specific embodiment, when the unlocking tool 5 is not inserted, the free end of the longitudinal rib 413 does not protrude from the lower surface of the pump body 1.

[0040] The guide groove 31 includes a transverse guide groove 311 and a longitudinal guide groove 312 . The transverse guide groove 311 is adapted to the guide pin 412 to allow the guide pin 412 to move up and down along the transverse guide groove 311 . The longitudinal guide groove 312 is adapted to the longitudinal rib 413 .

[0041] The guide groove 31 passes through the fixing cover 3 . Both side walls of the fixing cover 3 are provided with fixing lugs 32 . The fixing cover 3 is connected to the pump body 1 via the fixing lugs 32 with locking screws 33 .

[0042] The guide block 414 also includes a plane block 4142 . When the unlocking tool 5 is inserted, it is located behind the inclined block 4141 . The upper surface of the plug-in body 512 and the lower surface of the plane block 4142 are adapted and abutted.

[0043] An infusion pump includes the locking structure of the aforementioned infusion pump. The infusion pump in this specific embodiment is a further improvement of the Chinese patent application No.: 2023220093234, and the patent name is: A device combining a medicine box and a pump body and an electric infusion pump. On the basis of this patent of our company, a locking structure and an unlocking tool 5 are added, and the pump body and the medicine box are improved to adapt to the improved structure. Of course, the locking structure in this application can also be combined with other infusion pumps.

[0044] An infusion pump, the pump body 1 includes an upper shell and a lower shell, the lower shell is provided with a first through groove 7 for the up and down movement of the pin, in this specific embodiment, the first through groove 7 is used for the up and down movement of the guide pin 412, does not include the longitudinal rib 413, and the longitudinal rib 413 does not expose the lower surface of the pump body 1, a medicine box locking hole 8 is provided at the corresponding position of the upper surface of the medicine box 2, which is used to cooperate with the pin to achieve locking, locking levers 11 are provided on both sides of the pump body 1, which cooperate with the front and rear locking grooves of the medicine box 2 to quickly lock the two parts front and back, and the connection between the medicine box 2 and the pump body 1 is achieved through upper and lower locking holes 9 and upper and lower locking hooks 10 on the surfaces where the medicine box 2 and the pump body 1 abut each other.

[0045] The width of the upper lock hole of the upper and lower lock holes 9 decreases along the movement direction during installation. The upper and lower lock hooks 10 include lock hook side walls and a lock hook bottom wall. The lock hook bottom wall is located at the lower lock hole of the upper and lower lock holes 9.

[0046] The two opposite side walls of the pump body 1 are respectively provided with accommodating grooves, and the accommodating grooves are symmetrically arranged along the pump body 1. A locking lever 11 is provided in the accommodating groove, and the locking lever 11 can rotate relative to the pump body 1. The locking lever 11 is provided with a front and rear locking shaft, and the medicine box 2 is provided with a front and rear locking grooves. The front and rear locking grooves and the front and rear locking shafts cooperate with each other. When the locking wrench is closed, the locking lever 11 drives the front and rear locking shafts to slide inward along the front and rear locking grooves, and locks the front and rear locking shafts in the front and rear locking grooves.

[0047] Working state: the telescopic pin 4 without the unlocking tool 5 inserted is in an elastic state in the pump body 1. When the medicine box 2 is initially installed in the pump body 1, the telescopic pin 4 will be pressed into the shell of the pump body 1 by the surface of the medicine box 2. When the medicine box 2 is installed in place, the telescopic pin 4 automatically pops out by the spring force inside the pump body 1, and is inserted into the medicine box lock hole 8, completing the automatic locking of the medicine box 2 and the pump body 1. At this time, if you want to unlock it again, you must insert the unlocking tool 5 to mechanically retract the telescopic pin 4. Insert the unlocking tool 5 into the pump body jack 6, and the telescopic pin 4 of the pump body 1 will be withdrawn into the shell of the pump body 1 to unlock it, avoiding the problem of unlocking the pump body 1 by just twisting your hands left and right. Figure 6 As shown in a, 6b, and 6c, the unlocking tool 5 is inserted into the pump body 1, and cooperates with the locking levers 11 on both sides to open the connection between the pump body 1 and the medicine box 2.

[0048] The benefits of this specific embodiment are:

[0049] 1. After the medicine box 2 is quickly and preliminarily fixed conveniently by the locking levers 11 and the locking hooks on the left and right sides of the pump body 1, the pump body 1 and the medicine box 2 can be automatically locked by adding the built-in locking mechanism in this specific embodiment of the utility model. After that, even if the locking lever 11 is opened by mistake, the medicine box 2 and the pump body 1 cannot be unlocked. A specially designed unlocking tool 5 (key tool) needs to be inserted into the pump body socket 6 at the tail of the pump body 1 to unlock it again, so as to avoid clinical accidents such as uncontrolled infusion and blood return caused by improper unlocking.

[0050] 2. Since the core locking structure is designed as a built-in one, it avoids misleading non-professionals to forcefully pry the exposed locking lever 11 in the reverse direction, which may damage the exposed structure of the equipment, reduces the risk of misoperation during human-machine interaction caused by the exposed locking structure, and reduces the burden of after-sales maintenance;

[0051] 3. At the same time, since the left and right locking levers 11 are still the main force-bearing parts during normal operation, the pressure of the pump body 1 is not transmitted to the built-in locking mechanism during normal installation of infusion, so that the locking mechanism does not directly participate in the fixation of the medicine box 2, thereby improving the reliability of the infusion operation of the pump body 1. Specific embodiment 2

[0052] The difference between this specific embodiment and specific embodiment 1 is that this specific embodiment does not have the longitudinal rib 413 and the longitudinal guide groove adapted to the longitudinal rib 413 . Specific embodiment 3

[0053] The difference between this specific embodiment and specific embodiment 1 is that this specific embodiment omits the locking levers 11 on the left and right sides of the pump body 1 and other structures corresponding to the locking levers 11, and the front and rear locking shafts on the locking levers 11 and the front and rear locking grooves on the medicine box 2 are locked by means of locking hooks and locking structures.

[0054] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking structure of an infusion pump, used to lock the pump body and medicine box of the infusion pump, characterized in that: The locking structure includes an unlocking tool and a locking portion arranged in the pump body. The pump body is provided with a pump body socket. The shape of the pump body socket is adapted to the unlocking tool. The unlocking tool can pass through the pump body socket and be inserted into the locking portion. The locking portion includes a telescopic pin and a fixed cover. The telescopic pin can move relatively along the fixed cover. The telescopic pin includes an elastic member and a pin member. A guide groove corresponding to the pin member is provided on the fixed cover. Guide blocks are provided at positions corresponding to the lock portion and the pump body socket.

2. The locking structure of an infusion pump according to claim 1, characterized in that: One end of the elastic member is connected to the inner wall of the upper shell of the pump body, and the other end is connected to the pin. When the unlocking tool is inserted, as the unlocking tool is gradually inserted, the pin will move away from the medicine box and the elastic member will be compressed.

3. The locking structure of an infusion pump according to claim 2, characterized in that: The pin member includes a base, the upper surface of the base is connected to the elastic member, the lower surface of the base is provided with a guide pin, the end of the guide pin away from the base is a pin head, and the height of the pin head increases along the movement direction of the pump body and the medicine box during the initial installation.

4. The locking structure of an infusion pump according to claim 3, characterized in that: There are two pins, and the base is also provided with two longitudinal ribs, which are arranged between the two pins.

5. The locking structure of an infusion pump according to claim 3, characterized in that: The guide block is arranged on the base, and the side of the guide block close to the pump body insertion hole is a slope block.

6. The locking structure of an infusion pump according to claim 4, characterized in that: The height of the longitudinal rib is smaller than that of the guide pin, and when the unlocking tool is not inserted, the free end of the longitudinal rib does not protrude from the lower surface of the pump body.

7. The locking structure of an infusion pump according to claim 4, characterized in that: The guide groove includes a transverse guide groove and a longitudinal guide groove. The transverse guide groove is matched with the guide pin to allow the guide pin to move up and down along the transverse guide groove. The longitudinal guide groove is matched with the longitudinal rib.

8. The locking structure of an infusion pump according to claim 7, characterized in that: The guide groove passes through the fixing cover, and fixing lugs are arranged on both side walls of the fixing cover. The fixing cover is connected to the pump body through the fixing lugs by locking screws.

9. The locking structure of an infusion pump according to claim 5, characterized in that: The guide block also includes a plane block. When the unlocking tool is inserted, it is located behind the inclined block. The unlocking tool includes a plug-in end, a plug-in body and a holding portion. The plug-in end is an inclined surface, which is convenient for insertion between the pin and the fixed cover. The upper surface of the plug-in body and the lower surface of the plane block are adapted and abutted.

10. An infusion pump, characterized in that: A locking structure for an infusion pump comprising the invention as claimed in any one of claims 1 to 9, wherein the pump body comprises an upper shell and a lower shell, the lower shell being provided with a first through groove for the pin to move up and down, a medicine box locking hole being provided at a corresponding position on the upper surface of the medicine box for cooperating with the pin to achieve locking, locking levers being provided on both sides of the pump body for cooperating with the front and rear locking grooves of the medicine box to quickly lock the two parts front and back, and the connection between the medicine box and the pump body is achieved through upper and lower locking holes and upper and lower locking hooks on the surfaces where the medicine box and the pump body abut each other.

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