WO2006079269A1

WO2006079269A1 - Infusion pump without pump door

Info

Publication number: WO2006079269A1
Application number: PCT/CN2005/001628
Authority: WO
Inventors: Qun Gu; Yonghong Tan
Original assignee: Shenzhen Shenke Medical Appliances Co., Ltd.
Priority date: 2005-01-28
Filing date: 2005-09-30
Publication date: 2006-08-03
Also published as: CN2796728Y

Abstract

An infusion pump without a pump door comprises a housing (1) and a pump assembly (2). The pump assembly (2) comprises a mounting panel (21), a peristaltic pump (20), a bubble detector (23), a block detector (22), a movable pressing board (25) which is parallel to the mounting panel (21), and an elastic stretching/ contracting mechanism engaged with the movable pressing board (25). The elastic stretching/ contracting mechanism is forced to drive the movable pressing board (25) to move straight back and forth, so as to form a gap (40) between the mounting panel (21) and the movable pressing board (25) for containing an infusion tube. Then the gap (40) is closed to cause the infusion tube to be pressed between the mounting panel (21) and the movable pressing board (25). An open slot (111) matched to the gap (40) in size is provided on the front cover (11) of the housing (1), corresponding to the gap (40).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to medical devices, and more particularly to an infusion pump having a pumpless door structure. BACKGROUND OF THE INVENTION The currently used infusion pump, as shown in Fig. 1, in order to make the infusion pump operate normally and ensure the safety of the infusion, the infusion pump must have a bubble induction, blocking induction and positioning device; and since the infusion tube is a soft rubber hose, At present, a conventional infusion pump is provided with a pump door device for clamping the infusion tube at a suitable position and pressing the infusion tube. As shown in Figure la, Figure lb, and Figure 1c, the infusion pump, in operation, first grasps the door bolt 13 to pull the pump door 14 apart, and the hand infusion tube faces the liquid stop clip 15, the bubble sensor 23 and the blocking sensor 22 Positioning separately, then closing the pump door 14 and pressing the infusion tube with the pump door; thereafter, when the peristaltic pump 24 is driven by the motor to make a reciprocating wave-like peristalsis, the liquid in the infusion tube is squeezed into the body. An infusion pump having a pump door structure has the following disadvantages: Since the pump door 14 is fanned around a rotating shaft located at a side of the pump door, when the pump door 14 is closed, the force exerted by the rotating pump door 14 on the infusion tube is a The tangential force, which causes the infusion tube to deviate from the liquid trap 15, the bubble sensor 23, and the occlusion sensor 22, making it difficult to accurately position the infusion tube, so it is necessary to use a hand-held infusion tube before closing the door. The liquid clip 15, the bubble sensor 23 and the blocking sensor 22 are respectively positioned, so that it is difficult to realize the clamping and positioning of the infusion tube, and the operation is very cumbersome. Second, when the infusion tube is clamped, the hand touches the sensor and The positioning device is very inconvenient. Summary of the invention

The technical problem to be solved by the present invention is to provide an infusion pump which can also realize the infusion tube clamping without a pump door device. The technical solution adopted by the present invention to solve the above technical problems is:

An infusion pump without a pump door structure, comprising a casing and a pump body structure, the pump body structure comprises a fixed panel, a peristaltic pump, a bubble sensor and a blocking sensor, a fixed panel, a peristaltic pump, a bubble sensor and a blocking induction Fixing in the housing; a movable pressing plate disposed in parallel with the fixed panel; and an elastic stretching/compression mechanism engaged with the movable pressing plate; the elastic stretching/compression mechanism can be driven by an external force The movable platen reciprocates linearly along the center line of the plane of the movable platen so as to be between the fixed panel and the movable platen

1

Confirmation Opening a slit into which the infusion tube can be placed, and closing the slit to press the infusion tube between the fixed panel and the movable platen; and providing a housing corresponding to the position of the slit An open groove adapted to the size of the slit so that an infusion tube can be inserted into the gap opened between the fixed panel and the movable platen through the open groove. Further, the peristaltic pump is fixed on an end surface of the fixed panel; the movable pressing plate comprises a tube pressing plate of a size corresponding to the peristaltic pump, and a movable panel; the tube pressing plate is set in the movable panel and is peristaltic a corresponding position of the pump, and the end faces of the two are substantially maintained at the same horizontal plane; the elastic stretching/compression mechanism comprises: a tie rod connected to the tube press plate and perpendicular to the end surface of the tube press plate, the end of the pull rod and a The operating device is pinned; the operating device is disposed outside the casing for applying an external force to the pull rod to linearly move the pull rod along the axial direction of the pull rod; a top pressing plate disposed outside the pull rod, The top pressing plate is fixedly connected to the fixing body; at least one pair of large elastic members are disposed on two sides of the pulling rod, and the large elastic member is vertically installed between the back surface of the tube pressing plate and the top pressing plate, and is used for Pressing the tube pressing plate; and at least one pair of small elastic members respectively disposed on both sides of the pull rod, the small elastic members being vertically mounted on the back surface of the movable panel and the top pressing plate Between, for pressing the movable panel. Further, a guide is disposed outside the tie rod between the top plate and the end of the rod, and the guide is fixedly connected with the top plate. Further, the operating device is an eccentric handle; the handle has a top as a fulcrum, and an arm end short from the fulcrum is connected to the end of the rod through a pin, and is long from the fulcrum The boom is used as the steering arm; when the boom is pulled, the boom raises the arm end with the guide end surface as a supporting surface, thereby driving the lever to perform linear motion. Further, the top of the handle is a smooth flat top, so that the handle has a self-locking function. Further, the operating device is a handle having a beveled spiral groove, and a pin of the end of the rod is disposed in the spiral groove; when the handle is rotated, the pin can be along the inclined spiral groove Slide to move the rod for linear motion. The tube pressing plate and the pulling rod are an integral structure; the top pressing plate and the guiding device are an integral structure. The tube pressing plate and the pull rod are fixed by screwing.

Further, a step structure is disposed on the end surface of the movable panel, and the step structure is such that when the fixed panel and the movable panel are close together, a receiving space for the infusion tube is left in the interior of the movable panel. Fixed panel end face A limiting column is respectively disposed at two ends, and a card slot is respectively disposed at two ends of the opening slot; the limiting post cooperates with the card slot to form a positioning device when the infusion tube is placed. The beneficial technical effects of the present invention are:

1. By setting a movable platen parallel to the fixed panel, the movable platen engages an elastic stretching/compression mechanism, and when the infusion tube needs to be loaded, the movable platen is pulled by the elastic stretching/compression mechanism to fix the panel and the activity. Open a gap between the pressure plate to insert the infusion tube into the gap, insert the infusion tube into the gap through the open slot, and then press the infusion tube under the elastic force exerted by the elastic stretching/compression mechanism. It is between the fixed panel and the movable platen. In the present invention, since the force applied to the infusion tube through the movable platen is a vertical force, there is no tangential force, and the infusion tube does not cause a misalignment phenomenon, so that it is not necessary to use the hand infusion tube before the movable platen presses the infusion tube. The steps of positioning the bubble sensor and the blocking sensor respectively do not have the problem of touching the sensing device and the positioning device by hand, and the infusion tube can be completely automatically positioned under the action of the elastic stretching/compression mechanism to realize one-time clamping. The operation of the infusion pump is simple, convenient, fast and accurate, and meets the needs of users.

2. In the elastic stretching/compression mechanism, the elastic stretching/compression structure is simple and ingenious by providing at least one pair of large elastic members and a pair of small elastic members on both sides of the tie rod.

3. The control device adopts the eccentric handle structure, which utilizes the principle of leverage, which is labor-saving and simple in structure. Further, the top of the handle is set to a smooth flat top, which allows the pull to be pulled and has a self-locking function. DRAWINGS

Figure la, b, c is a schematic diagram of the operation of the existing infusion pump;

Figure 2 is a schematic view of an infusion pump without a pump door structure;

Figure 3 is a schematic view showing the separation of the infusion pump housing and the pump body without a pump door structure;

Figure 4 is a structural view of the infusion pump without a pump door structure when closed;

Figure 5 is a structural view of the infusion pump without the pump door structure when it is opened;

Figure 6 is a schematic view of the step structure of the movable panel;

Fig. 7 is a schematic diagram of the eccentric handle

Figure 8a, b, c, d are schematic diagrams of the operation of the infusion pump without a pump door structure;

Figure 9 is a structural view of the steering device using a beveled spiral groove handle. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described in detail below based on the accompanying drawings and embodiments:

An infusion pump without a pump door structure, as shown in Fig. 2 and Fig. 3, is the same as the conventional infusion pump. The infusion pump comprises a housing 1 and a pump body structure 2, and the pump body structure 2 is disposed in the housing 1. Referring to FIG. 4 and FIG. 5, the pump body structure includes: a motor 201, a peristaltic pump 20, a bubble sensor 23, a blocking sensor 22, and a fixing body 202 for fixing the motor 201, the peristaltic pump 20, and the like, and is fixed at The fixed body 202 is a side fixed surface plate 21; the bubble sensor 23, the blocking sensor 22, and the peristaltic portion of the peristaltic pump 20 are disposed in parallel at the same end surface of the fixed panel 21, and when the infusion pump is in operation, the infusion tube 40 is passed through the peristaltic portion of the peristaltic pump 20, the occlusion sensor 22, and the bubble sensor 23, and is pressed against the end surface of the fixed panel 21; unlike the conventional infusion pump, the infusion pump is not pressed by the pump door The liquid pipe 40 is tightly disposed, but a movable body is provided. The movable body includes a movable platen 25 disposed opposite the fixed panel 21. The end surface of the movable platen 25 is parallel to the end surface of the fixed panel 21, and the end surface of the movable platen 25 is sized. The end surface of the movable platen 25 is substantially coincident with the end surface of the fixed plate 21; and an elastic stretch is engaged with the movable platen 25/ a compression mechanism; the elastic stretching/compression mechanism can linearly reciprocate the movable platen 25 along the line of the plane of the movable platen 25 under the action of an external force, so as to open between the fixed panel 21 and the movable platen 25 a slit 40 into which the infusion tube 40 can be placed, as shown in FIG. 5; or pushing the movable platen 25 by elastic force, closing the slit 40, and pressing the infusion tube 40 against the fixed panel 21 Between the movable platens 25, as shown in FIG. 7c; and as shown in FIG. 3, an opening slot 111 corresponding to the size of the slit 40 is provided at a position corresponding to the position of the front shell 11 of the casing 1 and the slit 40. . Thus, when the infusion pump is in operation, the elastic stretching/compression mechanism is pulled to open the slit 40, and the infusion tube 40 is placed between the fixed panel 21 and the end surface of the movable platen 25 through the open groove 111 of the front casing. Then, the movable pressing plate 25 is driven by the elastic stretching/compression mechanism, the gap 40 is closed, and the infusion tube 40 is pressed between the fixed panel 21 and the movable platen 25; thereafter, the peristaltic pump 20 can push the infusion tube 40 normally. The infusion, bubble sensor 23, and occlusion sensor 22 can detect the working state of the infusion tube 40.

In the specific implementation of the present solution, the structure and elastic stretching/compression mechanism of the movable platen 25 of the movable portion are as shown in FIG. The movable platen 25 includes a tube pressing plate 252 sized corresponding to the peristaltic portion of the peristaltic pump 20, and a movable panel 251; the tube pressing plate 252 is fitted in the movable panel 251 at a position corresponding to the peristaltic pump 20, Moreover, the tube pressing plate 252 and the end surface of the movable panel 251 substantially maintain the same horizontal plane, and the function thereof When the infusion pump is in operation, the infusion tube 40 acting on the peristaltic pump 20 is pressed by the tube pressing plate 252. As the peristaltic pump 20 creeps, the tube pressing plate 252 will accordingly generate a corresponding slight peristalsis, and the movable panel 251 is always associated with The fixed panel 21 is kept in a state of being close together.

The elastic stretching/compression mechanism comprises the following parts: 1. A cylindrical rod 26 perpendicular to the end surface of the tube pressing plate 252, the connection between the tube pressing plate and the pulling rod may be integrally formed, or may be through a fixing device (such as a screw) Connected). 2. A handling device such as a handle 30, the handling device being coupled to the end of the pull rod 26 by a pin 261; the handling device must be disposed outside of the housing such that an operator applies an external force to the pull rod 26, The pull rod 26 moves linearly along the axial direction of the tie rod. 3. A top platen 29 is disposed on the outside of the pull rod 26 at the middle of the pull rod, and one side of the top pressing plate 29 is connected to the fixed body 202. 4. At least one pair of large elastic members and a pair of small elastic members respectively disposed on both sides of the tie rod, the size spring is used in practical application, and the large spring 27 adopts two pairs of four; the four large springs 27 are vertically mounted on the Between the four corners of the back surface of the tube pressing plate 252 and the top pressing plate 29, when the fixing panel 21 and the movable pressing plate 25 are closed, the tube pressing plate 252 is pressed, and the infusion tube 40 is clamped to the peristaltic portion and the tube of the peristaltic pump 20. Between the pressure plates, the liquid infusion tube 40 is prevented from leaking; the small spring 28 is vertically installed between the back surface of the movable panel 251 and the top pressure plate 29, and is also used to abut the movable panel 251 to fix the panel 21 and The movable panel 251 is always kept in a close state, so that the infusion tube 40 sandwiched between the blocking sensor 22 and the movable panel 251 of the fixed panel 21 can maintain a normal working pressure, so as to block the inductor 22 from performing the infusion tube 40. Normal detection. 5, a guide 291 is disposed outside the tie rod between the top platen 29 and the end of the tie rod 26, and the guide 291 is fixedly connected with the top plate 29, and the fixed connection may be integrally formed, or It is connected by a fixture.

In practical applications, the control device can take various forms, and the control device used in the technical solution is an eccentric handle 30; the handle uses the principle of a lever, as shown in FIG. 7, with the top of the handle as a fulcrum o, the distance from the fulcrum 0 short a segment is the arm, b segment long from the fulcrum 0 is the big arm; the end of the arm is connected to the end of the pull rod 26 through a pin 261, the boom is used as the steering arm; when pulled counterclockwise In the boom, the fulcrum 0 raises the end of the arm with the end surface of the guide 291 as a supporting surface, and the center of the pin 261 moves forward along the axial direction of the rod, and the rod 26 is driven to move linearly, thereby lifting the tube pressing plate. 252 the top movable panel 251 opens a gap 40 between the fixed panel 21 and the tube pressing plate 252 and the movable panel 251, and the infusion tube 40 can be placed therein; when the eccentric handle 30 is rotated clockwise to reset the handle, the tube The pressure plate 252 is reset and pressed against the infusion tube 40 by the action of the four large springs 27, and the movable panel 251 is reset by the two small springs 28 to close the fixed panel 21 to close the gap. The top of the handle 30 is a smooth flat top, so that the pull The hand 30 has a self-locking function after being pulled apart.

In order to enable the infusion tube 40 to be installed, the infusion tube 40 can be restrained between the bubble sensor 23 and the blocking sensor 22, and a limiting post 211 is disposed on the upper end surface of the fixing panel 21 and at the lower portion, and the opening of the front housing is provided. The two ends of the slot 111 are respectively provided with a card slot 112; the limiting post 211 cooperates with the card slot 112 to form a positioning device when the infusion tube 40 is placed, for positioning when the infusion tube 40 is placed; The end surface of the 251 is further provided with a step 2511. When the step 2511 is used to close the fixed panel 21 and the movable panel 251, a receiving space for positioning the infusion tube 40 is left inside.

Figure 8a, b, c, d shows the working process of the infusion pump of the structure of the present invention. The handle 30 is pulled 90 degrees in the direction of FIG. 8a and FIG. 8b; the handle 30 pulls the pull rod 26 to compress the large spring 27, the pull rod 26 lifts the tube pressure plate 252 and drags the movable panel 251 to open it, and the small spring 28 is compressed. The infusion tube 40 is prepared, the two-hand straight infusion tube 40 is placed in the slit 40, and the infusion tube 40 is stuck to the bottom card slot 112; then, as shown in Fig. 8c, the hand 30 is lowered, and the large spring 27 is stretched and topped. The tube 252 is tightly pressed to prevent the infusion tube 40 from leaking. The small spring 28 also closes the movable panel 251 to reset and close, and the slit 40 is closed, as shown in FIG. 8d. Thereafter, the buttons on the control panel 13 are operated and data can be set. jobs. It can be seen that the infusion pump of the invention cancels the pump door device, does not touch the induction device and the positioning device by hand, and the infusion tube 40 can be completely automatically positioned to realize one-time clamping, so that the operation of the infusion pump is simple, convenient and fast. Accurate, thus meeting the needs of users. In a practical application, the operating device can also be formed as a handle 31 having a beveled spiral groove 311. As shown in FIG. 9, the pin 261 at the end of the pull rod 26 is disposed in the bevel spiral groove 311; When the handle 31 is rotated, the pin 261 can slide along the inclined spiral groove 311 to drive the pull rod 26 to move linearly.

It should be understood that the description of the preferred embodiment of the infusion pump without a pump door structure of the present invention is too specific and should not be construed as limiting the scope of the invention.

Claims

Rights request

1. An infusion pump without a pump door structure, comprising a housing and a pump body structure, the pump body structure comprising a fixed panel, a peristaltic pump, a bubble sensor and a blocking induction crucible, a fixed panel, a peristaltic pump, a bubble sensor and The blocking sensor is fixed in the housing; and further comprising: a movable pressing plate disposed in parallel with the fixing panel; and an elastic stretching/compression mechanism engaged with the movable pressing plate; the elastic stretching/compression The mechanism can drive the movable platen to reciprocate linearly along the direction of the center line of the movable platen under the action of an external force, so as to open a gap between the fixed panel and the movable platen for inserting the infusion tube therein, and the closing portion a slit for pressing the infusion tube between the fixed panel and the movable platen; and an opening groove corresponding to the size of the slit is provided on the housing corresponding to the slit position so as to be able to pass The open channel is inserted into the gap between the fixed panel and the movable platen into the infusion tube.

-

2. The infusion pump according to claim 1, wherein: the peristaltic pump is fixed on an end surface of the fixed panel; the movable pressure plate comprises a tube pressure plate of a size corresponding to the peristaltic pump, and a movable panel; The tube press plate is disposed at a position corresponding to the peristaltic pump in the movable panel, and the end faces of the two are substantially maintained at the same horizontal plane;

The elastic stretching/compression mechanism includes: a pull rod connected to the tube pressing plate and perpendicular to an end surface of the tube pressing plate, the end of the pulling rod is pinned to a steering device; the operating device is disposed outside the housing An external force is applied to the pull rod to linearly move the pull rod along the axial direction of the pull rod;

a top plate on the outside of the pull rod, the top plate is fixedly connected to the fixed body; at least one pair of large elastic members respectively disposed on two sides of the pull rod, the large elastic member is vertically mounted on the tube press plate Between the back surface and the top pressing plate, for pressing the tube pressing plate; and at least one pair of small elastic members respectively disposed on both sides of the pulling rod, the small elastic members being vertically mounted on the back surface of the movable panel and the Between the top platens for pressing the movable panel.

The infusion pump according to claim 2, wherein: a guide is disposed outside the tie rod between the top plate and the end of the rod, and the guide is fixedly connected with the top plate .

4. The infusion pump according to claim 3, wherein: said manipulation device is an eccentric handle; said handle has a top portion as a fulcrum, and an arm end portion short from said fulcrum passes through a pin and The ends of the pull rods are connected, and the big arm long from the fulcrum is used as the control arm; when the big arm is pulled, the big arm is The end face of the guide lifts the end of the arm for the support surface, thereby driving the pull rod to perform linear motion.

5. The infusion pump according to claim 4, wherein: the top of the handle is a rounded flat top, so that the handle has a self-locking function.

The infusion pump according to claim 3, wherein: the manipulation device is a handle having a beveled spiral groove, and a pin of the end of the tie rod is disposed in the bevel groove; When the handle is used, the pin can slide along the inclined spiral groove to drive the pull rod to perform linear motion.

7. The infusion pump according to claim 6, wherein: the tube pressing plate and the pull rod are of a unitary structure; and the top pressing plate and the guide are of a unitary structure.

8. The infusion pump according to claim 6, wherein: the tube press plate and the pull rod are screwed and fixed.

The infusion pump according to any one of claims 2 to 8, wherein: a step structure is provided on an end surface of the movable panel, and the step structure is such that when the fixed panel and the movable panel are close together, There is a space for accommodating the infusion tube.

The infusion pump according to claim 9, wherein: a limiting post is respectively disposed at two ends of the end surface of the fixing panel, and a card slot is respectively disposed at two ends of the opening slot; Cooperating with the card slot to form a positioning device when the infusion tube is placed.