JP6811961B2 - Infusion pump - Google Patents

Description

The present invention relates to an infusion pump.

Conventionally, there is an infusion pump for injecting a drug solution into the body. Since this infusion pump uses an electric motor to send the solution, the injection rate of the drug solution can be set, and it is widely used to inject the drug solution into the patient over a long period of time by a fixed amount per hour. in use. This infusion pump is mounted and used in the middle of the infusion tube. An infusion bag is connected to one end of the infusion tube, an injection needle is connected to the other end, and the injection needle is injected into the patient to perform infusion. This infusion pump includes an infusion pump main body and a door that can be opened and closed with respect to the infusion pump main body.

The infusion pump main body includes a motor and a liquid feeding mechanism. The motor operates the liquid feeding mechanism. The liquid feeding mechanism sequentially presses the infusion tube to feed the liquid. When this liquid feeding mechanism is attached to the main body of the infusion pump and the door is opened, it is opened and the infusion tube can be attached. When the door is closed from this state, the infusion tube is pressed by the infusion mechanism, and the infusion can be sent by driving the motor. In the infusion pump configured in this way, in order to prevent so-called "free flow" when removing the infusion tube, it is necessary to close the infusion tube by a clamp in advance, which is not necessarily good in terms of operability. I can't say.

For this reason, conventionally, a technique using a dedicated clamp having an anti-free flow function has been provided (see Patent Document 1). In this technique, a clamp that is detachably used for the infusion tube is used, and the infusion tube is closed in advance by sandwiching an intermediate portion of the infusion tube. Then, when the door of the infusion pump is closed after setting this in the infusion pump, the clamp is opened in conjunction with the operation. Further, when the clamp is taken out together with the infusion tube, the infusion tube is closed again by pulling out the clamp.

Japanese Unexamined Patent Publication No. 2011-212112

However, in such a technique, a dedicated clamp is required, and a dedicated clamp release mechanism that opens the clamp when the clamp is attached to the infusion pump is required, which increases the number of parts and increases the number of parts. There was a problem that the manufacturing cost was high.

The present invention has been made in view of the above, and an object of the present invention is to provide an infusion pump capable of suitably suppressing the generation of free flow without using a dedicated clamp.

In order to solve the above-mentioned problems and achieve the object, the infusion pump according to the present invention includes a clamp in which the valve member is movably arranged along the sliding groove of the clamp body, and the valve member is closed. An infusion pump that infuse an infusion tube that opens the inside when the valve member is placed in the open position while the inside is closed when the valve member is placed in the position. The infusion pump main body having a clamp mounting portion to be mounted and a tube pressing portion for pressing the infusion tube is supported so as to be movable between an open state and a restrained state with respect to the infusion pump main body, and the open state is provided. In the above, the infusion tube can be attached to the tube pressing portion, and the clamp body can be attached to the clamp attachment portion. In the restrained state, the infusion tube and the clamp cannot be taken out, and the clamp cannot be taken out. The infusion tube has a tube restraint portion for pressing the infusion tube by the tube pressing portion, and the clamp valve member mounted on the clamp mounting portion in the restrained state is arranged at an open position in the tube restraining portion. It is characterized in that an opening prevention mechanism for preventing the tube restraint portion from moving to the open state by engaging with the valve member is provided.

Further, in the infusion pump according to the present invention, the opening prevention mechanism includes a locking member movably arranged in the tube restraint portion, and the locking member is said to be in the non-locking position. While allowing the tube restraint portion to move between the open state and the restraint state, when the tube restraint portion is arranged at the locking position in the restraint state, it is locked to the infusion pump main body and the tube restraint portion is opened. While the locking portion that prevents movement to the state and the locking portion that covers the sliding groove of the clamp mounted on the clamp mounting portion when the locking portion is arranged at the non-locking position, the locking portion It is preferable to have a regulating piece portion that opens the sliding groove of the clamp mounted on the clamp mounting portion when it is arranged at the locking position.

According to these configurations, when the valve member of the clamp is arranged in the open position, an opening blocking mechanism for preventing the tube restraint portion from moving to the open state by engaging with the valve member is provided. The infusion tube and clamp cannot be removed from the infusion pump when is open. Therefore, it is possible to prevent inadvertent free flow.

FIG. 1 is a perspective view showing a state in which the tube restraint portion of the infusion pump according to the embodiment of the present invention is opened. FIG. 2 is a front view of the infusion pump shown in FIG. FIG. 3 is a front view showing a state in which the tube restraint portion of the infusion pump shown in FIG. 1 is closed. FIG. 4 is a front view showing the lead-in portion and the rotor unit of the infusion pump shown in FIG. FIG. 5 is a rear view showing the lead-in portion and the rotor unit of the infusion pump shown in FIG. FIG. 6 is a side view showing the rotor unit of the infusion pump shown in FIG. FIG. 7 is a front view showing a state in which the top plate of the rotor unit of the infusion pump shown in FIG. 1 is removed. FIG. 8 is a perspective view showing a main part of the infusion pump shown in FIG. FIG. 9 is a perspective view showing an infusion tube receiving member of the infusion pump shown in FIG. FIG. 10 is a partial cross-sectional view taken along the line AA shown in FIG. FIG. 11 is a partial cross-sectional view in the middle of closing the tube restraint portion of the infusion pump shown in FIG. FIG. 12 is a partial cross-sectional view showing a state in which the tube restraint portion is further moved in the closing direction in the infusion pump shown in FIG. FIG. 13 is a front partial cross-sectional view showing the first grip portion of the infusion pump shown in FIG. FIG. 14 is a side view of the infusion pump shown in FIG. FIG. 15 is a perspective view of a locking member provided in the infusion pump shown in FIG. FIG. 16 is a front view showing a state in which the valve member is moved to the open position in the infusion pump shown in FIG. FIG. 17 is a front view showing a state in which the locking member is moved to the open position side in the infusion pump shown in FIG. FIG. 18 is a perspective view of the infusion pump shown in FIG. FIG. 19 is a front view showing a state in which the locking member is moved to the open position in the infusion pump shown in FIG. FIG. 20 is a perspective view of the infusion pump shown in FIG. FIG. 21 is a front view showing a state in which the tube restraint portion is moved from the open state to the restrained state in the infusion pump shown in FIG. FIG. 22 is a cross-sectional view taken along the line AA of the infusion pump shown in FIG.

A preferred embodiment of the infusion pump according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an infusion pump. FIG. 2 is a front view showing an infusion pump. The infusion pump 1 is a portable infusion pump, and as shown in FIGS. 1 to 5, it includes an infusion pump main body 2, a pull-in portion 3, a tube restraint portion 4, and an opening prevention mechanism 5. The infusion pump main body 2 includes a case 11, a rotor unit 12, a motor 13, and a control unit 14. The case 11 is formed in a rectangular parallelepiped box shape. A touch panel type panel is arranged as an operation unit 11a on the surface of the case 11. By operating this panel, the motor 13 can be driven, and the liquid feeding speed and the liquid feeding amount can be adjusted.

The rotor unit 12 is rotatably arranged with respect to the case 11 about the rotation shaft 21, and as shown in FIGS. 6 and 7, the rotor body 22, the plurality of tube pressing portions 23, and the plurality of restoring mechanisms 24 and. The rotor body 22 has a circular bottom plate 31, a cylindrical portion 32 concentric with the bottom plate 31 and having a diameter shorter than that of the bottom plate 31, and a ceiling having a concentric shape with the same diameter as the bottom plate 31 and facing the bottom plate 31 via the cylindrical portion 32. It has a plate 33 and. The central axis of the cylindrical portion 32 is the rotating shaft 21 of the rotor main body 22.

The tube pressing portions 23 press the flexible infusion tube 41, and are arranged at equal intervals on the circumference centered on the rotation shaft 21. The tube pressing portion 23 is a cylindrical roller configured such that a cylindrical portion 43 rotates around a cylindrical rotating shaft 42, and is parallel to the rotating shaft 21. The tube pressing portion 23 is arranged so that the outer circumference thereof coincides with the outer circumferences of the top plate 33 and the bottom plate 31 of the rotor main body 22. The distance between the tube pressing portions 23 is set so that when the rotor unit 12 is rotated, one tube pressing portion 23 always presses the infusion tube 41 with the infusion tube receiving member 73 described later. Has been done. The length of the cylindrical portion 43 of the tube pressing portion 23 in the extending direction is formed to be larger than the outer diameter when the infusion tube 41 is crushed.

The restoration mechanism 24 is arranged between the tube pressing portions 23, moves along with the infusion tube receiving surface 81 described later together with the tube pressing portion 23, and pushes the infusion tube 41 after being pressed by the tube pressing portion 23 from both sides. It is something to press. The restoration mechanism 24 has an infusion tube insertion portion 51 through which the infusion tube 41 passes. The infusion tube insertion portion 51 has a first insertion portion 52 and a second insertion portion 53 in which the interval through which the infusion tube 41 passes is smaller than that of the first insertion portion 52. The first insertion portion 52 and the second insertion portion 53 are arranged so that the second insertion portion 53 passes through the infusion tube 41 after the tube pressing portion 23 has passed through the first insertion portion 52. There is.

The first insertion portion 52 and the second insertion portion 53 are composed of a pair of cylindrical rollers arranged on the same circumference as the tube pressing portion 23. The first roller 54, which is a roller of the first insertion portion 52, is arranged so that the distance between the first rollers 54 is equal to the outer diameter of the infusion tube 41 in normal times. The second roller 55, which is a roller of the second insertion portion 53, is arranged so that the distance between the second rollers 55 is narrower than the normal outer diameter of the infusion tube 41. The first and second rollers 54 and 55 are configured such that the cylindrical portion 57 rotates around a cylindrical rotating shaft 56. The first and second rollers 54 and 55 are arranged so that their rotation shafts 56 are substantially orthogonal to the rotation shafts 21 of the rotor unit 12 and along the engagement direction of the top plate 33. The first and second rollers 54 and 55 are rollers having a diameter shorter than that of the tube pressing portion 23. The first and second rollers 54 and 55 are formed to have the same diameter.

The motor 13 rotates the rotor unit 12, and the rotating shaft 61 rotates using a battery as a drive source. The motor 13 is arranged so that its rotating shaft 61 is parallel to the rotating shaft 21 of the rotor unit 12. Further, a planetary gear reduction mechanism 62 is arranged between the motor 13 and the rotor unit 12. Although not shown in the figure, the planetary gear reduction mechanism 62 includes a sun gear and a planetary gear, and is arranged so that the rotation shaft 63 of the sun gear is parallel to the rotation shafts 21 and 61 of the rotor unit 12 and the motor 13. ..

The control unit 14 controls the rotation speed of the motor 13, and when the rotor unit 12 is rotated to sequentially move the plurality of tube pressing units 23 along the infusion tube 41, the liquid is fed. The rotation speed of the motor 13 is controlled so that the rotation speed of the motor 13 increases as the operating time of the motor 13 elapses. Further, when the control unit 14 controls the flow rate of the liquid flowing through the infusion tube 41, the relationship between the time and the flow rate of the infusion tube 41 used when performing the infusion using the infusion pump 1 is determined in advance. It is advisable to obtain it experimentally, convert it into a function, and perform control based on that function.

The pull-in portion 3 is inserted through a pair of screws 71 provided in the case 11 and can be slidably moved in a direction toward and away from the rotor unit 12. The pull-in portion 3 is urged by the spring 71a in the direction of the arrow in FIG. 4, that is, in the direction away from the rotor unit 12. A lid contact portion 72 that comes into contact with the tube restraint portion 4 is formed inside the pull-in portion 3. The pull-in portion 3 includes an infusion tube receiving member 73, a pair of infusion tube gripping portions 74, and a clamp mounting portion 75.

The infusion tube receiving member 73 has an infusion tube receiving surface 81 that serves as a receiving surface when the infusion tube 41 is pressed by the tube pressing portion 23. While pressing the infusion tube 41 so as to sandwich the infusion tube 41 between the infusion tube receiving surface 81 and the tube pressing portion 23, the plurality of tube pressing portions 23 are sequentially moved along the infusion tube receiving surface 81 in the longitudinal direction of the infusion tube 41. The liquid in the infusion tube 41 is fed in one direction.

The infusion tube receiving surface 81 is formed in a concave shape and is arranged so as to face the rotor unit 12. The infusion tube receiving surface 81 has a rotating shaft 21 of the rotor unit 12 when the retracting portion 3 is closest to the rotor unit 12, that is, when the infusion tube 41 is pressed by the tube pressing portion 23 and the infusion tube receiving surface 81. It is formed so as to form an arc centered on. When the infusion tube 41 is pressed by the tube pressing portion 23 and the infusion tube receiving surface 81, the pull-in portion 3 approaches the rotor unit 12 until the infusion tube 41 is closed.

The infusion tube receiving surface 81 is formed so that the rotor unit 12 fits into the infusion tube receiving surface 81 via the infusion tube 41. The infusion tube receiving surface 81 has a width dimension similar to that of the tube pressing portion 23. As shown in FIG. 9, the infusion tube receiving surface 81 has an unevenness 81a that prevents the relative movement of the infusion tube 41.

The pair of infusion tube gripping portions 74 grip the infusion tube 41 and prevent the infusion tube 41 from moving in the longitudinal direction. The pair of infusion tube grip portions 74 are provided on both sides of the infusion tube receiving surface 81 in the longitudinal direction of the infusion tube receiving surface 81, as shown in FIG. That is, the infusion tube gripping portion 74 is provided on the upstream side and the downstream side with the infusion tube receiving member 73 interposed therebetween. The infusion tube receiving surface 81 and the tube pressing portion 23 can be moved in a state where the mutual spacing is widened, and the pair of infusion tube gripping portions 74 have a mutual spacing between the tube pressing portion 23 and the infusion tube receiving surface 81. Before the infusion tube 41 is pressed by the tube pressing portion 23 and the infusion tube receiving surface 81 from the expanded state, the infusion tube 41 is gripped and is movable in a direction away from each other. ..

The pair of infusion tube grip portions 74 includes a first grip portion 82 that grips the upstream side of the infusion tube 41 and a second grip portion 83 that grips the downstream side of the infusion tube 41. The first grip portion 82 and the second grip portion 83 include a base portion 84 and a rotating body 85. As shown in FIG. 5, the base portion 84 of the first grip portion 82 is formed in the retracting portion 3 and is fitted in the moving groove 86 extending in the longitudinal direction of the infusion tube receiving member 73, and is fitted in the infusion tube 41. It is arranged so as to be movable in the extending direction. The base portion 84 of the first grip portion 82 is urged by the spring 87 in a direction approaching the second grip portion 83. The first grip portion 82 can be moved so as to increase the distance between the first grip portion 82 and the second grip portion 83 by about 10%. The base portion 84 of the first grip portion 82 and the second grip portion 83 includes a rotating body support portion 90 that pivotally supports the rotating body 85, a bottom surface portion 91 having a bottom surface 91a that abuts on the infusion tube 41, and an infusion tube 41. It has a first side surface portion 92 having a first side surface 92a that comes into contact with the infusion tube 41, and a second side surface portion 93 having a second side surface 93a that comes into contact with the infusion tube 41.

As shown in FIGS. 10 and 11, the rotating body 85 of the first grip portion 82 and the second grip portion 83 has a rectangular parallelepiped first main body portion 101 and a first main body portion 101 from one end of the first main body portion 101. It is composed of a rectangular parallelepiped second main body 102 protruding in a direction orthogonal to the above, and a tip 103 protruding from the tip of the second main body 102 in the same direction as the first main body 101. The first main body 101 is rotatably supported by the case 11, and can rotate in the direction in which the rotating body 85 sandwiches the infusion tube 41 (closed direction) and in the direction in which the infusion tube 41 is released (opening direction). It has become. Further, the first main body 101 is urged in the opening direction.

The second main body 102 is formed with a top surface 104 with which the infusion tube 41 abuts. When the rotating body 85 is rotated in the closing direction, the tip portion 103 comes into contact with the surface of the second side surface portion 93 opposite to the second side surface 93a, which comes into contact with the infusion tube 41, and the second side surface portion 93. Is pressed in the direction of contact with the infusion tube 41.

The bottom surface portion 91, the first side surface portion 92, the second side surface portion 93, and the second main body portion 102 form a tube insertion hole 105 having a rectangular cross section. The bottom surface 91a, the first side surface 92a, the second side surface 93a, and the top surface 104 are portions that abut the infusion tube 41, and the first side surface 92a and the second side surface 93a have irregularities that prevent the infusion tube 41 from moving relative to each other. 106 is given.

The clamp mounting portion 75 is a portion on which the clamp 111 is mounted. The clamp mounting portion 75 is a recess formed in the retracting portion 3 on the downstream side of the infusion tube receiving member 73, and the clamp 111 is fitted therein.

As shown in FIG. 1, the clamp 111 includes a clamp main body 222 in which a sliding groove 221 is formed, and a roller 223 (valve member) that can move in the sliding groove 221 along the sliding groove 221. There is. The clamp body 222 has a bottom plate 231 and a pair of side walls 232 rising from both ends of the bottom plate 231. Inside the pair of side walls 232, a roller shaft fitting groove 233 to which the roller shaft 234, which is the shaft of the roller 223, is fitted is formed. The roller shaft fitting grooves 233 are arranged so as to face each other, and in FIG. 1, they are formed in a straight line extending in a direction away from the bottom plate 231 as they go upward.

The tube restraint portion 4 has a window portion 241 opened at the front surface, and opens and closes with respect to the infusion pump main body 2 by rotating around a rotation shaft arranged in the infusion pump main body 2. In FIG. 1, the tube restraint portion 4 is formed so as to cover the right side portion of the case 11. Inside the tube restraint portion 4, a contact portion 112 is formed that abuts on the lid contact portion 72 of the pull-in portion 3 and moves the pull-in portion 3. The contact portion 112 is formed so as to project inward of the tube restraint portion 4.

The opening blocking mechanism 5 includes a locking member 201 and a fitting hole 202 into which the locking member 201 fits. As shown in FIG. 15, the locking member 201 has a main body portion 211, an operating portion 212, a locking portion 213, and a regulation piece portion 214. The main body 211 is a plate-shaped member, and is urged in the locking direction described later by a spring (not shown). The main body portion 211 is fitted into the fitting hole 202 so as to be slidably movable with respect to the tube restraint portion 4. The operation portion 212 is a plate-shaped member provided above the main body portion 211, and is arranged so as to be exposed to the outside of the tube restraint portion 4. The locking portion 213 is a plate-shaped member, is formed integrally with the main body portion 211, and projects to the left of the main body portion 211 in parallel with the main body portion 211 in FIG. The locking portion 213 is fitted in the fitting hole 202 so as to be slidably movable with respect to the tube restraining portion 4. The tip of the locking portion 213 is fitted to the locked portion 215 provided on the infusion pump main body 2 to be locked. The direction in which the locking portion 213 is locked to the locked portion 215 is the locking direction.

In the figure, the regulation piece portion 214 is a plate-shaped member integrally formed with the main body portion 211 below the main body portion 211 via a height adjusting portion 216. The height adjusting portion 216 extends in the direction perpendicular to the main body portion 211. The regulation piece portion 214 extends parallel to the main body portion 211. The regulation piece portion 214 is fitted in the fitting hole 202 and slidably arranged with respect to the tube restraint portion 4. The regulation piece portion 214 is arranged so as to face the window portion 241. The length of the regulation piece portion 214 is such that when the clamp 111 is mounted on the clamp mounting portion 75, the tube restraining portion 4 is in the restrained state, and the roller 223 is arranged in a position other than the closed position, the tube restraining portion 4 is opened. The length of the regulation piece 214 is set to abut on the roller 223 when it is attempted to move to. The fitting hole 202 is a hole formed in the tube restraint portion 4.

In the clamp 111, the roller 223 can move to the open position of one side end of the sliding groove 221 and the closed position of the other end. When the infusion tube 41 is attached to the clamp 111, the infusion tube 41 is closed when the roller 223 is placed in the closed position, and the infusion tube 41 is placed when the roller 223 is placed in another position. Is now open.

As shown in FIGS. 2, 10, and 14, the portable infusion pump 1 formed in this way holds the infusion tube 41 in the infusion tube gripping portion 74 with the tube restraint portion 4 open (open state). Attach to. Further, the clamp 111 in which the roller 223 is in the closed position is attached to the clamp mounting portion 75. At this time, the rotating body 85 of the infusion tube grip portion 74 is in an upright state. Then, as shown in FIG. 11, when the tube restraint portion 4 is moved in the closing direction, the contact portion 112 of the tube restraint portion 4 comes into contact with the lid contact portion 72 of the pull-in portion 3, and the rotor of the pull-in portion 3 The movement to the unit 12 side is started. At this time, the rotating body 85 of the infusion tube grip portion 74 comes into contact with the ceiling portion 130 of the case 11 and starts rotating in the direction of gripping the infusion tube 41. Further, when the tube restraint portion 4 is rotated in the closing direction, as shown in FIG. 12, the pull-in portion 3 further moves toward the rotor unit 12, the rotating body 85 also rotates further, and the infusion tube grip portion 74 moves the infusion tube. The 41 is in a gripped state. At this time, the tip 103 of the infusion tube grip portion 74 abuts on the surface of the second side surface portion 93 opposite to the second side surface 93a, which is the contact surface of the infusion tube 41, and the second side surface portion 93 is infused. It is in a state of being pressed in the direction of contact with the tube 41. Therefore, in this state, the infusion tube 41 is sandwiched between the first side surface 92a and the second side surface 93a. At this time, the second main body 102 of the infusion tube gripping portion 74 is pressed against the ceiling 130 of the case 11, and the top surface 104 of the second main body 102 is pressed against the infusion tube 41. .. Therefore, the infusion tube 41 is sandwiched between the top surface 104 and the bottom surface 91a.

Further, when closing the tube restraint portion 4, after the infusion tube 41 is securely gripped by the infusion tube grip portion 74, as shown in FIG. 13, the first grip portion 82 of the infusion tube grip portion 74 The cam contact portion 122 abuts on the cam portion 121 provided in the case 11 and is pressed by the cam portion 121, so that the first grip portion 82 moves in the stretching direction (arrow direction in the drawing) of the infusion tube 41. It has become like. As a result, the infusion tube 41 is stretched.

When the tube restraint portion 4 is completely closed and the locking member 201 is arranged at the locking position, the tube restraining portion 4 is prevented from moving to the open position. At this time, as shown in FIG. 4, the pull-in portion 3 moves until the rotor unit 12 and the infusion tube receiving member 73 come into contact with each other via the infusion tube 41, and the infusion tube is formed by the tube pressing portion 23 and the infusion tube receiving surface 81. 41 is pressed, the infusion tube 41 is closed, the infusion tube 41 and the clamp 111 cannot be taken out, and the tube restraint portion 4 is in a restrained state. In this state, the locking portion 213 is locked to the locked portion 215. In this state, the locking portion 213 can be slidably moved to a non-locking position that allows the movement of the tube restraining portion 4 and a locked position that is locked to the infusion pump main body 2 to prevent movement to the open state. Is. Therefore, when the locking portion 213 is arranged in the non-locking position, the locking portion 213 and the locked portion 215 are released from each other, and the tube restraining portion 4 can be opened, that is, the tube restraining portion 4 is opened. You can move to the open state.

When the locking portion 213 is arranged at the locking position, the regulating piece portion 214 opens the sliding groove 221 of the clamp 111 mounted on the clamp mounting portion 75. The restricting piece portion 214 covers the sliding groove 221 of the clamp 111 mounted on the clamp mounting portion 75 when the locking portion 213 is arranged in the non-locking position.

When the tube restraint portion 4 is in the restrained state, as shown in FIG. 16, when the roller 223 of the clamp 111 is moved to the open position of the infusion tube 41, the liquid can be fed. Then, when the operation unit 11a is operated to drive the motor 13, the liquid is fed. In this state, that is, when the tube restraint portion 4 is in the restraint state and the roller 223 is in the open position, when the locking member 201 is slidably moved, the regulation piece portion 214 has a window as shown in FIGS. It projects so as to face the portion 241 and engages with the roller 223 to prevent the locking member 201 from sliding to the open position. Therefore, the locked state of the locked portion 213 and the locked portion 215 is maintained, and the tube restraint portion 4 does not open, that is, the tube restraint portion 4 does not move to the open state. As a result, when the infusion tube 41 is removed from the infusion pump 1, the infusion tube 41 is not removed with the roller 223 of the clamp 111 in the open position, and free flow is prevented.

When the roller 223 is moved to the closed position, the locking member 201 can slide to the open position as shown in FIGS. 19 and 20, and the locking portion 213 is also locked with the locked portion 215. It can be released, and the tube restraint portion 4 can be opened, that is, the tube restraint portion 4 can be moved to the open state.

As shown in FIGS. 21 and 22, when the tube restraint portion 4 is in the open state, the clamp 111 is mounted on the clamp mounting portion 75, and the roller 223 is in the open position, the tube restraint portion 4 is in the open state. The regulation piece portion 214 of the locking member 201 engages with the roller 223, and the tube restraint portion 4 does not move to the restraint state even if the locking member 201 is moved to the restrained state.

As described above, according to the infusion pump 1, when the clamp 111 is attached to the clamp mounting portion 75 and the tube restraint portion 4 is in the restrained state, the roller 223 of the clamp 111 is arranged in the open position. The regulation piece 214 of the stop member 201 engages with the roller 223 to prevent the tube restraint 4 from moving to the open state. In order to open the tube pressing portion 23, the roller 223 of the clamp 111 must be in the closed position. Therefore, it is possible to prevent the so-called free flow that occurs when the infusion tube 41 is removed from the infusion pump 1, in other words, when the pressing state by the tube pressing portion 23 is released while the roller 223 is in the open position. ..

2 Infusion pump body 4 Tube restraint part 5 Opening prevention mechanism 23 Tube pressing part 41 Infusion tube 75 Clemme mounting part 111 Clemme 222 Clemme body 223 Roller (valve member)

Claims (2)

The infusion is provided so that the valve member can be moved along the sliding groove of the main body of the infusion, and when the valve member is arranged in the closed position, the inside is closed while the valve member is arranged in the open position. It is an infusion pump that infuse the infusion tube that is opened inside when it is applied.
An infusion pump body having a clamp mounting portion on which the clamp body is mounted and a tube pressing portion for pressing the infusion tube, and an infusion pump body.
It is supported so as to be movable in an open state and a restrained state with respect to the infusion pump main body, and in the open state, the infusion tube can be attached to the tube pressing portion, and the clamp body is attached to the clamp. It has a tube restraint portion that can be mounted on the mounting portion, and in the restrained state, the infusion tube and the clamp cannot be taken out, and the infusion tube is pressed by the tube pressing portion.
When the valve member of the clamp mounted on the clamp mounting portion is arranged in the open position in the restrained state, the tube restraining portion is moved to the open state by engaging with the valve member. An infusion pump characterized by being provided with an open blocking mechanism to block. The opening prevention mechanism includes a locking member movably arranged on the tube restraint portion.
The locking member is
The tube restraint portion is allowed to move between the open state and the restrained state when arranged in the non-locking position, while the infusion pump main body is arranged in the locked position in the restrained state. A locking portion that is locked to prevent the tube restraint portion from moving to the open state,
When the locking portion is arranged at the non-locking position, it covers the sliding groove of the clamp mounted on the clamp mounting portion, while when the locking portion is arranged at the locking position, the clamp mounting portion is mounted. A regulation piece that opens the sliding groove of the clamp attached to the part, and
The infusion pump according to claim 1, wherein the infusion pump has.