JP5915688B2 - Pump, tube unit - Google Patents

Description

  The present invention relates to a tube unit, a control unit, and a micro pump configured by mounting them.

  There is a peristaltic pump as a device for transporting liquid at low speed. As a peristaltic drive pump, a step motor is used as a drive source, a rotor having a plurality of rollers is rotated, and the rotor rotates along a flexible tube while rolling the plurality of rollers to suck and discharge liquid. The structure which performs is known (for example, patent document 1).

  Such a pump is assembled by stacking a pump module including a tube and a rotor for closing the tube, a motor module having a step motor and an output gear mechanism, and a gear as a connecting element is provided on the rotating shaft of the rotor. The output gear mechanism is provided with a pinion as a power take-off mechanism. When the pump module and the motor module are stacked and coupled, the pinion and the gear are engaged with each other, and the rotational driving force of the step motor is transmitted to the rotor. It is the composition which is done.

Japanese Patent No. 3177742

  In such a peristaltic drive pump of Patent Document 1, since the tube is always pressed and closed by a roller after manufacture, when the period from manufacture (assembly) to use is long, the tube deteriorates, There is a problem that it becomes impossible to ensure the liquid discharge accuracy.

  In addition, when the pump module and the motor module are stacked and mounted, the pinion and the gear are engaged with each other, so if the tooth portions are out of phase, the pinion and the gear may overlap and be destroyed. Can be considered.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] A micropump according to this application example includes a tube that is partly arranged in an arc shape and has elasticity, and a plurality of fingers that are arranged radially from the arc center direction of the arc shape of the tube, A tube unit having a guide frame that holds the tube and the plurality of fingers; a cam that sequentially presses the plurality of fingers from the inflow side to the outflow side of the tube; and a drive unit that applies a rotational force to the cam. A control circuit unit that performs drive control of the drive unit, a control unit that includes the cam, the drive unit, and a machine frame that holds the control circuit unit, and a reservoir that communicates with the inlet portion of the tube; A power supply for supplying power to the control circuit unit, and the tube unit is detachably mounted on the rotation surface of the cam in a substantially horizontal direction with respect to the control unit. It is characterized in that is.

  If the tube is kept in the pressure-closed state for a long time, it is considered that the restoring force of the tube deteriorates and the discharge accuracy decreases. However, according to this application example, the tube unit can be separated from the control unit having a cam that presses a plurality of fingers that press-close the tube. Maintained. For this reason, it is possible to prevent the discharge accuracy from being lowered due to the deterioration of the restoring force due to the continuous pressure closing of the tube, and to maintain the desired discharge accuracy.

  In addition, it is conceivable that the restoring force of the tube may deteriorate due to repeated capping and releasing of the tube for a long time.In such a case, it is necessary to replace the tube. Can be exchanged.

  In addition, since the cam and the drive unit are configured as a control unit, when the tube unit and the control unit are mounted, it is not necessary to mesh and couple the pinion and the gear as in the configuration of the prior art described above. Therefore, there is no destruction in the process of meshing.

  Moreover, if a tube unit is mounted | worn with respect to a control unit in a horizontal direction, a several finger can be made into the state which can press a tube. Therefore, unlike the prior art, no connection mechanism is required between the motor module and the pump module, the structure can be simplified, and the assemblability can be improved. Furthermore, it is possible to reduce the thickness.

  Also, the tube unit can be made much cheaper than a control unit including a cam, a drive unit, and a control circuit unit. Therefore, if a tube unit including a tube that is in direct contact with a chemical solution is disposable and the control unit is used repeatedly, the running cost can be reduced.

  Application Example 2 In the micropump according to the application example, it is preferable that the tube unit is mounted in a space provided in the machine casing.

  According to such a configuration, the machine frame constituting the control unit has the function of a case, and the case for housing the tube unit and the control unit is not required, the structure can be simplified and the thickness can be reduced.

  [Application Example 3] In the micropump according to the application example, when the tube unit is attached to the control unit, the guide unit that substantially matches the arc center of the arc shape of the tube and the rotation center of the cam is provided. It is preferable that it is provided in the tube unit and the control unit.

  The micropump of this application example is configured to press-close a tube by pressing a plurality of fingers by rotation of a cam. Accordingly, it is necessary to make the arc center of the arc shape of the tube substantially coincide with the rotation center of the cam.

  Therefore, when the tube unit is mounted on the control unit, the center of the arcuate shape of the tube and the rotation center of the cam can be matched by providing the guide portions on both sides, and no dedicated position restricting member is provided. However, all of the plurality of fingers can reliably perform tube pressure closing.

  Application Example 4 The micropump according to the application example described above detects that the arc center of the arc shape of the tube substantially coincides with the rotation center of the cam when the tube unit is attached to the control unit. It is preferable that a vessel is provided between the tube unit and the control unit.

  With such a configuration, when the detector detects that the arc center of the arc shape of the tube coincides with the rotation center of the cam, the drive unit can be driven, so that all of the plurality of fingers are Since it is driven in the case of the state having the same pressure closing amount, the fluid can be discharged at a desired flow rate per unit time.

  Application Example 5 The micropump according to the application example includes a lid member for fixing the tube unit to the control unit, and an arc shape of the tube is provided between the lid member and the tube unit. It is preferable that an elastic member that urges the tube unit toward the control unit in a direction in which the arc center and the rotation center of the cam substantially coincide is provided.

  When fixing the tube unit to the control unit using a lid member, it is possible that a horizontal gap will occur between the tube unit and the control unit due to dimensional variations in the components, making it impossible to close the tube with fingers. It is done.

  Therefore, by urging the tube unit in the direction of the control unit by the elastic member, the guide unit of the tube unit is securely brought into contact with the guide unit of the control unit described above, and the arc center of the arc shape of the tube and the cam The center of rotation coincides with each other, and each of the plurality of fingers can surely close the tube.

  Application Example 6 In the micropump according to the application example described above, it is preferable that the biasing force of the elastic member is larger than the tube pressing force of the plurality of fingers.

  In this way, when the finger presses the tube, the tube unit (that is, the tube) does not move away from the finger due to the pressing force of the finger, so that the tube can be reliably closed.

  Application Example 7 In the micropump according to the application example described above, it is preferable that part or all of the machine frame and the guide frame are transparent.

  By making the machine frame and the guide frame transparent, it is possible to visually recognize the internal component parts or the engagement relationship and driving state of each component part. From this, it is possible to detect whether it is in a normal state or where there is a defect. Furthermore, the amount of liquid in the reservoir can be visually confirmed. In addition, the range to be transparent may be a range of a portion to be visually recognized.

Application Example 8 In the micropump according to the application example, it is preferable that the power source is accommodated in the tube unit.
As a power source, it is preferable to employ, for example, a small button type battery or a sheet type battery in order to realize miniaturization of the micropump.

  When the chemical solution to be used is changed or when the used tube is replaced, if the battery is replaced with the tube as a tube unit, it is possible to prevent the battery capacity from being insufficient during the period of use.

  Application Example 9 In the micropump according to the application example, it is preferable that the power source is detachably attached to the tube unit.

  When a small battery is used as a power source, it is expected that the battery capacity will be insufficient during the period of use. Therefore, if the battery can be easily replaced by itself, the micropump can be used continuously for a long time.

  Application Example 10 In the micropump according to the application example described above, it is preferable that the reservoir is detachably attached to the tube.

  It is conceivable that the chemical solution stored in the reservoir is insufficient when the micropump is used. Therefore, by making the reservoir attachable to and detachable from the tube, it is possible to remove the reservoir in which the chemical solution is reduced, connect the reservoir containing the chemical solution to the tube, and use the micropump for a long time.

  Application Example 11 In the micropump according to the application example, it is preferable that the reservoir is accommodated in the tube unit.

  In this way, if the tube unit including the tube is replaced when the liquid in the reservoir is exhausted, the tube can be removed before it deteriorates, which can be caused by repeated tube closing and opening for a long time. As a tube unit, the reliability of the micropump can be improved.

  Application Example 12 In the micropump according to the application example, it is preferable that the reservoir and the power source are accommodated in the tube unit.

  The tube unit is mounted in the machine frame of the control unit. Therefore, providing both the reservoir and the power source inside the tube unit means that they are accommodated in the control unit.

  In this way, the essential functions required for the micropump can be housed in the machine frame, which can be miniaturized, and since there are no parts protruding from the machine frame, it is easy to handle and mounted in the living body. It is suitable for use.

  In addition, since the battery can be replaced as a tube unit in accordance with the replacement of the reservoir or the replacement of the tube, the reliability can be further improved.

  Furthermore, when the battery is provided outside the micropump, a long lead for connection and a battery case are required, but according to this application example, there is an advantage that it is not necessary.

Application Example 13 In the micropump according to the application example described above, it is desirable that the reservoir includes a port for injecting or sealing a fluid therein.
Here, for example, a septum or the like can be adopted as the port.

  By providing a septum in the reservoir, fluid can be easily injected into the reservoir while the reservoir is connected to the tube.

  Application Example 14 In the micropump according to the application example described above, the reservoir is accommodated in the tube unit, the port is held in close contact with an opening provided in the guide frame, and the outside of the guide frame is It is desirable that the inlet portion of the port is arranged so that it can be viewed.

  According to such a configuration, it is possible to easily inject additional fluid into the reservoir in the state of the tube unit. Further, even when the tube unit is mounted on the control unit, additional fluid can be easily injected. Furthermore, fluid can be easily injected even when the micropump is used.

  In addition, by tightly fixing the port to the tube guide frame, it is possible to prevent fluid from entering the tube unit from between the port and the tube guide frame.

  Application Example 15 In the micropump according to the application example described above, it is preferable that an air vent filter for blocking passage of bubbles is provided in a communication portion between the reservoir and the tube.

  It is conceivable that air is dissolved in the fluid stored in the reservoir, and that the dissolved air gathers over time to form bubbles. When the liquid is a chemical solution and is discharged into the living body, it may have an influence that cannot be overlooked if it is injected including bubbles.

  Therefore, by providing an air vent filter that allows the liquid to pass through the communication part of the reservoir and the tube and blocks the passage of the bubbles, it is possible to prevent the bubbles from entering the living body, thereby improving safety. it can.

  Application Example 16 In the micropump according to the application example, it is preferable that the power source is accommodated in the control unit.

  In such a configuration, the control circuit unit and the power source can be easily connected by accommodating the power source in the control unit.

  Moreover, since the power source can be made thicker than the configuration in which the power source is mounted in the tube unit by disposing the power source outside the range where the tube unit is mounted, a power source having a large capacity can be employed.

  Furthermore, since the empty space of the tube unit increases, the liquid capacity of the reservoir can be increased accordingly.

  Application Example 17 In the micropump according to the application example described above, it is preferable that the power source is detachable from the control unit.

  In this way, the power supply can be replaced even when the tube unit is mounted on the control unit.

  [Application Example 18] A control unit according to this application example includes a tube having a part thereof arranged in an arc shape and having elasticity, and a plurality of fingers arranged radially from the arc center direction of the arc shape of the tube, A cam that is detachable from a tube unit having a guide frame that holds the tube and the plurality of fingers, and that sequentially presses the plurality of fingers from the inflow side to the outflow side of the tube; and the cam A drive unit that applies a rotational force to the drive unit, a control circuit unit that performs drive control of the drive unit, and a machine frame that holds the cam, the drive unit, and the control circuit unit. .

  According to the configuration of this application example, the control unit is configured to include elements related to driving such as a driving unit, a cam, and a control circuit unit. Therefore, it is possible to confirm driving as a control unit. Moreover, the connection mechanism between each element which concerns on a drive is unnecessary, and it can be immediately made into a use state by carrying out slide mounting | wearing of the tube unit.

  Application Example 19 In the control unit according to the application example, it is preferable that a power supply for supplying power to the control circuit unit is detachably mounted.

  In such a configuration, the control circuit unit and the power source can be easily connected by accommodating the power source in the control unit.

  In this way, the power supply can be exchanged even in the state of the control unit or in the state where the tube unit is attached to the control unit.

  Application Example 20 A tube unit according to this application example includes a cam, a drive unit that applies a rotational force to the cam, a control circuit unit that performs drive control of the drive unit, the cam, the drive unit, and the control. A tube that can be attached to and detached from a control unit having a machine frame that holds the circuit unit, and is arranged such that the center of rotation of the cam and the center of the arc shape substantially coincide with each other, and the direction of rotation center of the cam A plurality of fingers arranged radially, and a guide frame for holding the tube and the plurality of fingers.

  According to this application example, in the state of the tube unit, since the tube is maintained in an open state, it is possible to prevent a decrease in discharge accuracy due to deterioration in restoring force accompanying holding in the tube pressure closed state. .

  Also, the tube unit can be much cheaper than a control unit that includes high-cost elements such as cams, drive units, and control circuit units. Therefore, if the tube unit including the tube that is in direct contact with the chemical solution is disposable, the running cost can be reduced.

  Application Example 21 In the tube unit according to the application example, the guide frame has a finger guide hole communicating with a tube guide groove into which the tube is inserted, and each of the plurality of fingers is the finger. It is preferable to have a shaft portion that is inserted into the guide hole and a bowl-shaped tube pressing portion that is larger than the diameter of the finger guide hole and contacts the tube.

  In this way, in the state of the tube unit alone, the tube pressing portion has a function of pressing and closing the tube and a positioning function of the advance and retreat of the fingers, and can prevent the fingers from falling out of the finger guide holes. .

  Application Example 22 In the tube unit according to the application example described above, it is preferable that a reservoir communicating with the inlet portion of the tube is accommodated.

  By housing the reservoir inside the tube unit, the tube unit including the reservoir can be easily handled. Further, since the reservoir and the tube are connected inside the tube unit, the tube can be shortened.

  Application Example 23 It is preferable that the tube unit according to the application example described above accommodates a power source that supplies power to the control circuit unit.

  As the power source, for example, a small button type battery or a thin sheet type battery is adopted in order to realize downsizing of the tube unit.

  When changing the chemical solution to be used, or when replacing the tube over a long period of time, the battery can be replaced with the tube as a tube unit, and it is possible to prevent the battery capacity from becoming insufficient during the period of use. .

  Application Example 24 In the tube unit according to the application example, it is preferable that a reservoir communicating with the inlet portion of the tube and a power source for supplying power to the control circuit unit are accommodated.

  According to such a configuration, since the battery can be replaced as a tube unit in accordance with the replacement of the reservoir or the replacement of the tube, the reliability can be further enhanced.

FIG. 2 is a schematic plan view showing the micropump according to the first embodiment. FIG. 2 is an overview front view showing the micropump according to the first embodiment. FIG. 3 is an exploded plan view of the micropump according to the first embodiment. FIG. 3 is an exploded front view of the micropump according to the first embodiment. FIG. 3 is a plan view of the micropump according to the first embodiment. (A) is sectional drawing which shows the AP-A 'cut surface of FIG. 5, (b) is sectional drawing which shows the FF cut surface of (a). FIG. 3 is a partial cross-sectional view illustrating a tube holding structure of the micropump according to the first embodiment. A part of micro pump concerning Embodiment 2 is shown, (a) is a fragmentary top view, and (b) is a sectional view showing an EE cut surface of (a). A part of micro pump concerning Embodiment 3 is shown, (a) is a fragmentary top view, and (b) is a sectional view showing the GG section of (a). A part of micro pump concerning Embodiment 4 is shown, (a) is a fragmentary top view, and (b) is a sectional view showing a HH cut surface of (a). A part of micro pump concerning Embodiment 5 is shown, (a) is a partial top view, and (b) is a sectional view showing an II section of (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 7 show the micropump of the first embodiment, FIG. 8 shows the second embodiment, FIG. 9 shows the third embodiment, FIG. 10 shows the fourth embodiment, and FIG. 11 shows the fifth embodiment.
Note that the drawings referred to in the following description are schematic views in which the vertical and horizontal scales of members or portions are different from actual ones for convenience of illustration.
(Embodiment 1)

  FIG. 1 is a schematic plan view showing the micropump according to the first embodiment, and FIG. 2 is a schematic front view. 1 and 2, the micropump 10 is installed by slidingly inserting the tube unit 11 into the space 110 from the opening on the left side surface of the control unit 12 in the figure and attaching the tube unit 11 to the control unit 12 by a fixed frame 13 as a lid member. It is fixed by a fixing screw 90 and configured integrally.

  The tube unit 11 includes an elastic tube 50 that is partially arranged in an arc shape, a first tube guide frame 17 and a second tube guide frame 18 that serve as a guide frame for holding the tube 50, and the flow of the tube 50. The inlet 52 is configured to include a reservoir 14 that communicates with the liquid and a plurality of fingers 40 to 46. Hereinafter, the fluid will be described as a liquid such as a chemical solution.

  The control unit 12 includes a cam 20, a motor as a driving unit that applies a rotational force to the cam 20, a transmission mechanism, and a control circuit unit that controls driving of the motor (both are not shown). ing.

  The cam 20, the motor, the transmission mechanism, the fingers 40 to 46, and the control circuit unit are held in a space 100 formed by the first machine frame 15 and the second machine frame 16 as a machine frame.

  One end of the tube 50 is an outflow port 53, which protrudes outside through the fixed frame 13 and discharges liquid from the reservoir 14 to the outside.

  A part of the reservoir 14 is provided with a septum 95 as a port for injecting or sealing liquid inside the reservoir 14. The septum 95 projects from the inside of the fixed frame 13.

Then, the structure of the tube unit 11, the control unit 12, and the fixed frame 13 and the assembly method are demonstrated.
3 is an exploded plan view of the micropump, and FIG. 4 is an exploded front view. 3 and 4, (a) shows the fixed frame 13, (b) shows the tube unit 11, and (c) shows the control unit 12.

  As shown in FIGS. 3 and 4, in the control unit 12, spaces 100 and 110 are constituted by a first machine casing 15 and a second machine casing 16. The space 100 is provided with a cam 20, a motor, a transmission mechanism, and a control circuit unit (not shown), and a space 110 having an opening on one side is a space in which the tube unit 11 is mounted.

  The fingers 40 to 46 are inserted into finger guide holes 85 (provided corresponding to the fingers 40 to 46) formed by the first tube guide frame 17 and the second tube guide frame 18 as guide frames. It is worn. The fingers 40 to 46 have one end projecting in the direction of the space 110, the other end projecting in a direction contacting the tube 50, and the tube 50 when the tube unit 11 is attached to the control unit 12. Can be closed.

  The tube unit 11 is connected to the space 110 of the control unit 12 from the left side in the figure in a state where the tube 50 and the reservoir 14 are connected by a communication member and held by the first tube guide frame 17 and the second tube guide frame 18. Installed.

  The cam 20 rotates about the rotation center P. The tube unit 11 is attached to the control unit 12 in parallel with the rotation plane of the cam 20.

  Further, a packing 97 is fitted in the vicinity of the fixed frame 13 side of the tube unit 11 along the outer peripheral surface, and the space 110 is sealed in a state where the tube unit 11 is inserted into the control unit 12.

  Further, the tube unit 11 is pushed into the control unit 12 until the concave wall surface 18a comes into contact with the wall surface 15a projecting in an arc shape of the control unit 12. The wall surfaces 15 a and 18 a are formed concentrically with the rotation center P of the cam 20.

  Here, in a state where the wall surface 15 a and the wall surface 18 a are in contact, the control unit side end portions 18 c and 18 d of the tube unit 11 are dimensioned so that a gap is formed between the inner side walls 15 b and 15 c of the control unit 12. (See also FIG. 5).

  This gap ensures that the wall surface 15a and the wall surface 18a abut, and the arc center P ′ of the arc-shaped portion of the tube 50 (the range pressed by the fingers 40 to 46) coincides with the rotation center P of the cam 20. Is provided.

  After the tube unit 11 is inserted into the control unit 12, the fixed frame 13 is mounted from the tail direction (opening side of the space 110) of the tube unit 11. Specifically, a fixing screw 90 is inserted into the through holes 13 d and 13 e opened in the fixing frame 13 and screwed and fixed to a screw hole (not shown) provided in the first machine frame 15 of the control unit 12. .

  An outlet part 53 of the tube 50 and a septum 95 provided in the reservoir 14 project from the tube unit 11, and when the fixed frame 13 is fixed, the tube 50 is the tube insertion hole 13a, and the septum 95 is the septum insertion hole. The outlet portion 53 is projected and extended outside the fixed frame 13 through the 13b.

  A protrusion 96 is formed on the side surface of the first tube guide frame 17 on the fixed frame 13 side. The protrusion 96 is used when the tube unit 11 is extracted from the control unit 12. The protrusion 96 is accommodated in a recess 13 c formed in the fixed frame 13.

  Next, the configuration and operation of each element of the micropump 10 assembled as described above will be described with reference to the drawings.

  5 to 7 show the micropump according to the present embodiment, FIG. 5 is a plan view, FIG. 6A is a cross-sectional view taken along the line A-P-A 'in FIG. 5, and FIG. Sectional drawing which shows the FF cut surface of a), FIG. 7: is a fragmentary sectional view which shows a tube holding structure. First, the configuration of the drive unit will be described with reference to FIGS. FIG. 5 is a perspective view of the second machine casing 16 and the second tube guide frame 18.

  The drive unit includes a step motor 70 as a motor, and transmits the rotation of the step motor 70 to the cam drive gear 74 via a transmission mechanism (consisting of a motor gear 71, a first transmission wheel 72, and a second transmission wheel 73). To do.

  The step motor 70 is held by the motor support frame 19 and is fixed to the first machine frame 15 by a fixing screw 93. The step motor 70 has a motor gear 71.

  The first transmission wheel 72 and the second transmission wheel 73 are rotatably supported by the first machine casing 15 and the second machine casing 16.

  The first transmission wheel 72 is pivotally supported by a bearing 115 provided on the first machine casing 15 and a bearing 112 provided on the second machine casing 16 in a state where the transmission gear 72a is fixed to the pinion 72b.

  The second transmission wheel 73 is pivotally supported by a bearing 113 provided on the first machine casing 15 and a bearing 113 provided on the second machine casing 16 in a state where the transmission gear 73 a is fixed to the pinion 73 b.

  The cam drive gear 74 is fixed to the cam shaft 75 together with the cam 20 to form a cam drive wheel 80, and is constituted by a bearing 114 provided on the first machine casing 15 and a bearing 114 provided on the second machine casing 16. It is pivotally supported. Between the motor gear 71 and the cam drive gear 74, the gear ratio of each gear is set so as to drive at a reduced speed, and the predetermined rotation speed and rotation torque of the cam 20 are set.

  The step motor 70, the first transmission wheel 72, the second transmission wheel 73, and the cam drive wheel 80 are disposed in a space 100 configured by the first machine frame 15 and the second machine frame 16. The joint surfaces of the first machine casing 15 and the second machine casing 16 are in close contact with each other.

  As a joining structure of the first machine casing 15 and the second machine casing 16, a structure in which fixing is performed using a fixing screw 91 as shown in FIG. 5, a structure in which the joining surfaces are welded or bonded, and the like can be adopted.

  Further, the control unit 12 is provided with a control circuit unit 30, which is connected to the step motor 70 via a circuit pattern provided on a circuit board (not shown), and rotates the step motor 70 at a predetermined rotational speed.

  The cam 20 has irregularities in the outer peripheral direction, and finger pressing surfaces 21a to 21d are formed on the outermost peripheral portion. The finger pressing surfaces 21a to 21d are formed on concentric circles equidistant from the rotation center P.

  Moreover, the circumferential pitch and outer shape of the finger pressing surface 21a and the finger pressing surface 21b, the finger pressing surface 21b and the finger pressing surface 21c, the finger pressing surface 21c and the finger pressing surface 21d, and the finger pressing surface 21d and the finger pressing surface 21a Are equally formed.

  The finger pressing surfaces 21a to 21d are formed continuously with the finger pressing inclined surface 22 and a concentric circular arc portion 23 centering on the rotation center P. The arc portion 23 is provided at a position where the fingers 40 to 46 are not pressed.

  Further, the end portions of the finger pressing surfaces 21a, 21b, 21c, and 21d and the arc portion 23 are connected by a linear portion 24 that extends from the rotation center P.

  Next, the structure of the tube unit 11 is demonstrated with reference to FIG. 5, FIG. A part of the tube 50 facing the cam 20 has an arc shape and is mounted in a tube guide groove 17 c formed in the first tube guide frame 17.

  The arc-shaped arc center P ′ (see FIG. 3) of the tube 50 coincides with the rotation center P of the cam 20 in the mounted state. One end of the tube 50 communicates with the reservoir 14, and the other end is an outflow port 53 that extends through the tube insertion hole 13 a of the fixed frame 13.

  The fingers 40 to 46 are inserted into finger guide holes 85 formed by the first tube guide frame 17 and the second tube guide frame 18. The finger guide holes 85 are provided corresponding to the fingers 40 to 46, respectively, and extend radially from the rotation center P of the cam 20 (that is, coincident with the arc center P ′ of the tube 50) at equal intervals. It is installed.

  Since the fingers 40 to 46 are formed in the same shape, the finger 43 will be described as an example.

  As shown in FIG. 6B, the finger guide hole 85 is formed by sealing the upper opening of the substantially U-shaped groove 15 h formed in the first tube guide frame 17 with the second tube guide frame 18. Composed. The finger guide hole 85 penetrates from the tube guide groove 17c to the wall surface 18a.

  As shown in FIG. 6A, the finger 43 includes a cylindrical shaft portion 43a, a bowl-shaped tube pressing portion 43c provided at one end portion of the shaft portion 43a, and the other end portion being hemispherical. And a rounded cam contact portion 43b.

The diameter of the tube pressing portion 43c is set larger than the diameter of the finger guide hole 85, restricts the movement of the finger 43 in the axial direction, and does not fall off the tube unit 11.
After the shaft 43a is mounted in the groove 15h from the direction of the opening, the finger 43 is mounted on the first tube guide frame 17 from above so that the position in the cross-sectional direction is regulated.

  The tube 50 is almost entirely mounted in the tube guide groove 17c, so that the plane position is regulated, and a protrusion as a tube holding portion is formed on a part of the side wall of the tube guide groove 17c to lift upward. To regulate.

  FIG. 7 is a partial cross-sectional view showing the tube holding structure. In addition, FIG. 7 illustrates and demonstrates the protrusion part between the finger 45 and the finger 46 among the protrusion parts between the fingers 40-46 adjacent to each other (refer also to FIG. 5).

  The tube guide groove 17c is provided with a tube guide side wall 17f as a protrusion having a width that does not prevent the fingers 45, 46 from moving forward and backward between the finger 45 and the finger 46, and the tube guide side wall 17f is provided above the tube 50. A protruding portion 17e that protrudes in part is formed.

  Thus, by providing the tube guide side wall 17f and the projection 17e between the fingers, the position of the tube in the planar direction and the suppression of the floating are performed in the range where the fingers 40 to 46 are disposed.

  In the present embodiment, as shown in FIG. 5, a protrusion 17h having a function similar to that of the protrusion 17e is provided at a position near the outlet 53 of the tube 50 and a position near the inlet 52. Yes.

  In a state where the tube 50 and the reservoir 14 and the fingers 40 to 46 are mounted on the first tube guide frame 17, the first tube guide frame 17 and the second tube guide frame 18 are brought into close contact with each other to fix the fixing screw 92. The tube unit 11 is configured by fixing using the.

  The vicinity of the outlet portion 53 of the tube 50 is in a state in which the first tube guide frame 17 and the second tube guide frame 18 are fixed, and the tube guide groove 17c and the tube 50 are used by packing or bonding. To seal. By doing in this way, the inside of the tube unit 11 becomes a sealed structure.

Further, a packing 97 is fitted on the outer periphery of the tube unit 11 in the vicinity of the fixed frame 13, the inside of the tube unit 11 is inserted into the control unit 12, the inside is a sealed space, and the micropump 10 is waterproof. And it has a dustproof structure.
In addition, when the micropump 10 may have a non-waterproof structure, the packing 97 is unnecessary.

  In addition, in the tube guide groove 17c, at least in the plane range in which the fingers 40 to 46 press the tube 50, the tube regulation wall 17d formed by the recess along the tube guide groove 17c in the direction in which the fingers 40 to 46 advance. Is formed.

  An elastic member 60 is provided in the recess. That is, the elastic member 60 is provided between the tube restriction wall 17d and the tube 50. The elastic member 60 serves as a damper when the tube 50 is closed by the fingers 40 to 46 with an excessive pressing force, and is provided so that the tube 50 does not deteriorate. The elastic member 60 has an elastic force that can withstand tube pressure closure. Moreover, it is more preferable to make the coefficient of friction with the tube 50 small.

  In addition, an air vent filter 65 as a communication member is provided at a joint portion between the inlet portion 52 of the tube 50 and the reservoir 14. Inside the air vent filter 65, a filter having a lyophilic property and forming fine holes is provided. This filter passes liquid and blocks the passage of bubbles.

  In this embodiment, the air vent filter is a connecting member between the reservoir 14 and the tube 50, and the reservoir 14 and the tube 50 can be separated and inserted.

  The pores formed in the filter are in the range of 0.1 to 1 μm and allow liquid to pass therethrough and suppress the intrusion of bubbles of 0.1 μm or more or 1 μm or more generated in the reservoir 14 into the tube 50.

  In addition, protrusions 17b are formed on the side surface and back surface of the base portion (fixed frame 13 side) of the first tube guide frame 17, and protrusion portions 17n are formed on the side surface and back surface of the tip portion. Similar protrusions 18b and 18e are also formed on the outer surfaces of the portion and the tip.

  In a state where the first tube guide frame 17 and the second tube guide frame 18 are joined, the protrusions 17b and 18b become a ring-like protrusion that is continuous, and the protrusions 17n and 18e become a ring-like protrusion that is continuous. .

  The tube unit 11 is slid into the control unit 12. At this time, by providing the protrusions 17b, 17n, 18b, and 18e, the positional accuracy of the control unit 12 and the tube unit 11 is increased, and the resistance at the time of insertion or extraction is reduced.

  A protrusion 96 having a groove 96a is formed on the tail (on the fixed frame 13 side) of the tube unit 11. The protrusion 96 is used when the tube unit 11 is removed from the control unit 12 with the groove 96a interposed therebetween.

  Next, the operation related to the transport and discharge of the liquid according to the present embodiment will be described with reference to FIG. In the state shown in FIG. 5, the cam 20 is rotated via the transmission mechanism by the rotational force from the step motor 70 (shown in the direction of arrow R), and the finger 44 is pressed by the finger pressing surface 21 d of the cam 20 to move the tube 50. Closed.

  The finger 45 is also in contact with the joint portion between the finger pressing surface 21d and the finger pressing slope 22 to press-close the tube 50. Further, the finger 46 presses the tube 50 on the finger pressing slope 22 but is smaller than the pressing amount of the finger 44 and does not completely close the tube 50.

  The fingers 41 to 43 are in the range of the arc portion 23 of the cam 20 and are in an initial position where they are not pressed. In addition, the finger 40 is in contact with the finger pressing slope 22 of the cam 20, but the tube 50 is not yet closed at this position.

  When the cam 20 is further rotated in the direction of arrow R from this position, the fingers 50 and 46 are pressed in this order by the finger pressing surface 21d of the cam 20, and the tube 50 is closed. The finger 44 is released from the finger pressing surface 21d, and the tube 50 is opened. The liquid flows into the liquid flow part 51 of the tube 50 from the finger to a position where the pressure closure is released or a position where the pressure closure is not yet performed.

  When the cam 20 is further rotated by the step motor 70, the finger pressing slope 22 is sequentially pressed from the liquid inflow side to the outflow side in the order of the fingers 40, 41, 42, 43, and reaches the finger pressing surface 21c. The tube 50 is closed.

  By repeating such an operation, the liquid flows from the inlet portion 52 side toward the outlet portion 53 side and is discharged from the outlet portion 53.

  At this time, any one of the finger pressing surfaces of the cam 20 abuts two of the fingers 40 to 46, and moves one of the fingers 40 to 46 when moving to a position to press the next finger. Press. Thus, by repeating the state of pressing two fingers and the state of pressing one finger, a state in which at least one finger always press-closes the tube 50 is formed. Such a structure of the micropump by the movement of the fingers 40 to 46 is called a peristaltic drive system.

  Therefore, according to the present embodiment, since the tube unit 11 can be separated from the control unit 12 including the cam 20 that presses the fingers 40 to 46 that press-close the tube 50, the tube unit 11 alone is a tube. 50 is kept open. Therefore, it is possible to prevent the discharge accuracy from being lowered due to the deterioration of the restoring force due to the continuous pressure closing of the tube 50, and to maintain the desired discharge accuracy.

  In addition, it is considered that the restoring force of the tube 50 is deteriorated by repeating the closing and opening of the tube 50 for a long time. In such a case, the tube needs to be replaced. Can be easily replaced.

  Further, since the cam 20, the step motor 70, and the transmission mechanism are configured as the control unit 12, when the tube unit 11 is attached to the control unit 12, the pinion and the gear as in the prior art described above are engaged with each other. Since it is not necessary to join, there is no destruction in the meshing process.

  Moreover, if the tube unit 11 is mounted | worn with respect to the control unit 12 in the horizontal direction, the fingers 40-46 can be made into the state which can press a tube. Therefore, unlike the prior art, a connection mechanism is not required between the motor module and the pump module, the structure can be simplified, the assemblability can be improved, and the thickness can be reduced.

  Moreover, the tube unit 11 can be made much cheaper than the control unit 12 including the cam 20, the step motor 70, the transmission mechanism, and the control circuit unit 30. Therefore, if the tube unit 11 including the tube 50 that is in direct contact with the chemical solution or the like is disposable and the control unit 12 is repeatedly used, the running cost can be reduced.

  In addition, the inner diameter and the outer diameter of the tube 50 may have dimensional variations. These dimensional variations affect the discharge accuracy. Therefore, the discharge accuracy can be improved by forming the tube 50 and the fingers 40 to 46 having a length matching the dimensions of the tube 50 as a set to form a tube unit.

  Further, since the tube unit 11 is mounted inside the space 110 provided in the control unit 12, the first machine casing 15 and the second machine casing 16 constituting the control unit 12 have a function of a case, and the tube A case for housing the unit 11 and the control unit 12 becomes unnecessary, and the structure can be simplified.

  Further, since the tube unit 11 is inserted in the horizontal direction with respect to the control unit 12, it can be made thinner than the stacked structure as in the prior art.

  Further, the micropump 10 of the present embodiment has a configuration in which the fingers 50 to 46 are pressed by the rotation of the cam 20 to press-close the tube 50. Therefore, it is necessary to match the arc center P ′ of the arc shape of the tube 50 with the rotation center P of the cam.

  Therefore, when the tube unit 11 is mounted on the control unit 12, the guide portions (the wall surface 18a and the wall surface 15a) are provided on both sides so as to contact each other, whereby the arc center P ′ of the arc shape of the tube 50 and the rotation center P of the cam The fingers 40 to 46 can reliably perform tube pressure closing without providing a dedicated position restricting member.

  In the present embodiment, one or all of the first machine casing 15, the second machine casing 16, the first tube guide frame 17, and the second tube guide frame 18, or the first machine casing 15 and the second A part or the whole of the machine frame 16, the first tube guide frame 17, and the second tube guide frame 18 is formed of a transparent material.

  By doing in this way, it is possible to visually recognize the internal component parts or the engagement relationship and drive state of each component part, and it is possible to detect whether it is in a normal state or where there is a defect. In addition, what is necessary is just to let the range made transparent at least the range of the part to view visually.

  Further, if the reservoir 14 can be viewed from the upper side or the lower side, the amount of liquid to be stored can be observed. More preferably, the reservoir 14 is a transparent container.

  In addition, by storing the reservoir 14 in the tube unit 11, if the tube unit 11 including the tube 50 is replaced when the liquid in the reservoir 14 runs out, it can be replaced before the tube 50 deteriorates. The reliability of the pump can be increased.

  Further, an air vent filter 65 is provided as a connecting member between the reservoir 14 and the tube 50, and is configured to be detachable from each other. Therefore, it is possible to remove the reservoir 14 in which the chemical solution is reduced, connect the reservoir 14 in which the chemical solution is stored to the tube 50, and use the micropump for a long time.

  Further, by providing an air vent filter 65 between the reservoir 14 and the tube 50, the passage of bubbles contained in the liquid into the tube 50 is blocked, and when the liquid is a chemical and is discharged into the living body, Air bubbles can be prevented from being injected into the living body, and safety is improved.

  In addition, the reservoir 14 includes a septum 95 as a port for injecting and sealing the liquid therein. By providing the septum 95 in the reservoir 14, it is possible to easily inject liquid into the reservoir 14 with the tube 50 connected to the reservoir 14.

  Further, the septum 95 is provided so as to protrude outside the first tube guide frame 17 and arranged so that the inflow port of the septum 95 can be seen from the outside of the fixed frame 13, so that the state of the tube unit 11 or the control unit The liquid can be easily injected into the reservoir 14 while being attached to the reservoir 12.

Further, even when the micropump 10 is used, additional liquid can be easily injected.
(Embodiment 2)

  Next, Embodiment 2 will be described with reference to the drawings. The second embodiment is characterized in that an elastic member that biases the tube unit 11 toward the control unit 12 is provided. Therefore, the description will focus on the differences from the first embodiment.

  8A and 8B show a part of the micropump according to the second embodiment, where FIG. 8A is a partial plan view, and FIG. 8B is a cross-sectional view showing the EE cut surface of FIG. In FIG. 8A, a plate spring 99 as an elastic member is provided between the tube unit 11 and the fixed frame 13.

  The plate spring 99 is fixed to a concave plate spring fixing portion 13 f provided on the tube unit 11 side of the fixed frame 13. The force point of the leaf spring 99 is on the center line J, and urges the tube unit 11 toward the rotation center P of the cam 20.

  As a result, the wall surface 18 a of the tube unit 11 and the wall surface 15 a of the control unit 12 abut on the center line J.

  As shown in FIG. 8B, the plate spring 99 is fixed by using a fixing means such as heat-welding the guide shaft 13g protruding from the plate spring fixing portion 13f of the fixed frame 13. Note that the leaf spring 99 does not necessarily have to be fixed because it does not have to be dropped with the fixed frame 13 fixed.

  When the tube unit 11 is fixed to the control unit 12 with the fixed frame 13, the horizontal direction (between the tube unit 11 and the control unit 12 due to dimensional variations of components such as the tube unit 11, the control unit 12, and the fixed frame 13). It is conceivable that a gap in the plane direction) is generated and the tube 50 cannot be closed by the fingers 40 to 46.

  Therefore, by urging the tube unit 11 toward the control unit 12 by the leaf spring 99, the wall surfaces 15a and 18a are brought into contact with each other, so that the arc center P ′ of the arc shape of the tube 50 and the rotation center of the cam 20 are obtained. By matching P, all of the fingers 40 to 46 can reliably close the tube 50.

  Further, the urging force of the leaf spring 99 is set to be larger than the tube pressing force of the fingers 40 to 46.

  In this way, when the fingers 40 to 46 close the tube 50, the tube unit 11 (that is, the tube 50) does not move away from the fingers 40 to 46, so that the tube is surely closed. Can do.

In the present embodiment, the leaf spring 99 is exemplified as the elastic member. However, the elastic member is not limited to the leaf spring, but may be a coil spring, a flat plate having elasticity in the thickness direction, or a structure using a plurality of these.
(Embodiment 3)

  Next, a micro pump according to Embodiment 3 will be described with reference to the drawings. Embodiment 3 is characterized in that the power source is accommodated in the tube unit. Therefore, the description will focus on the differences from the first embodiment.

  9A and 9B show a part of the micropump according to the third embodiment, where FIG. 9A is a partial plan view, and FIG. 9B is a cross-sectional view showing a GG cut surface of FIG. 9A and 9B, a small button type battery 120 (hereinafter simply referred to as a battery 120) as a power source is accommodated in the tube unit 11.

  The battery 120 is mounted together with the reservoir 14 in a recess formed in the first tube guide frame 17, and the upper part is sealed by the second tube guide frame 18. Here, when the illustrated lower surface of the battery 120 is a negative pole and the upper surface and side surfaces are positive poles, the lower surface is connected to the negative terminal 121 and the side surface is connected to the positive terminal 122.

  The minus terminal 121 and the plus terminal 122 are connected to connection terminals 123 and 124 that are planted at the end of the first tube guide frame 17 by leads (not shown).

  The connection terminals 123 and 124 protrude from the first tube guide frame 17 and extend to the inside of the control unit 12. The control unit 12 is provided with connection terminals (not shown) that are electrically connected to the connection terminals 123 and 124, and these connection terminals are connected to the control circuit unit 30 (see FIG. 5).

  With the tube unit 11 attached to the control unit 12, power is supplied from the battery 120 to the control circuit unit 30, and the micropump 10 can be driven.

  The battery 120 may be housed inside the tube unit 11 and the reservoir 14 may be provided outside the tube unit.

  When the chemical solution to be used is changed or when the used tube 50 is replaced, it is possible to prevent the battery capacity from becoming insufficient during use by replacing the battery 120 together with the tube 50 as the tube unit 11.

  Further, the battery 120 is detachable from the tube unit 11. In the configuration shown in FIG. 9, an example in which the battery 120 is attached and detached by removing the fixing screw 92 (see FIG. 5) that joins the first tube guide frame 17 and the second tube guide frame 18 is shown.

  Here, as a structure for attaching and detaching the battery 120, a structure may be adopted in which a battery lid is provided on the second tube guide frame 18, and as a structure in which the battery 120 is slid and inserted from the tail portion (fixed frame 13 side) of the tube unit 11, A structure in which the fixed frame 13 is removed and the battery 120 is attached or detached may be employed.

In the present embodiment, a small button type battery is exemplified as the battery, but other secondary batteries such as a sheet battery and a lithium ion battery can be adopted. When these batteries are used, they can be disposed so as to overlap with the reservoir, and even when the battery is accommodated in the tube unit, there is an advantage that the capacity of the reservoir can be increased.
(Embodiment 4)

  Next, a micro pump according to Embodiment 4 will be described with reference to the drawings. The fourth embodiment is characterized in that a detector including a connection terminal and a detection terminal for detecting whether the tube unit is inserted in an accurate position with respect to the control unit is provided. Therefore, the description will focus on the differences from the first embodiment.

  10A and 10B show a part of the micropump according to the fourth embodiment, where FIG. 10A is a partial plan view, and FIG. 10B is a cross-sectional view showing the HH cut surface of FIG. 10A and 10B, the first connection terminal 66 and the second connection terminal 67 are planted at the peninsular end portions on both sides of the wall surface 18a formed in the tube unit 11.

  One end of the first connection terminal 66 and the second connection terminal 67 is electrically connected by a connection lead 94. Further, the other end protrudes from the control unit side ends 18c and 18d so as to enter the inside of the control unit 12.

  The control unit 12 (first machine casing 15) includes a first detection terminal 68 and a second detection terminal 69 each having a substantially U-shaped spring shape. Since the first detection terminal 68 and the second detection terminal 69 have the same shape, the second detection terminal will be described as an example.

  The second detection terminal 69 is bent and mounted in a recess provided in the first machine casing 15. Here, the arm portions 69a and 69b of the second detection terminal 69 press opposite side walls in the recess.

  Therefore, the position of the arm portion 69a is regulated by the side wall 15g in the recess. The position of the side wall 15g is accurately regulated with respect to the rotation center P position of the cam 20. Further, the positions of the front end portions of the first connection terminal 66 and the second connection terminal 67 are also accurately regulated with respect to the rotation center P position of the cam 20.

  When the tube unit 11 is mounted on the control unit 12 to a position where the arc-shaped wall surface 18a of the tube unit 11 and the arc-shaped wall surface 15a of the control unit contact each other, the second connection terminal 67 is electrically connected to the second detection terminal 69. Connected to. At the same time, the first connection terminal 66 is also electrically connected to the first detection terminal 68.

  A lead 64 is connected to the second detection terminal 69, and the lead 64 is connected to a detection terminal A (not shown) of the control circuit unit 30. On the other hand, a lead 63 is connected to the first detection terminal 68, and the lead 63 is connected to a detection terminal B (not shown) of the control circuit unit 30.

  Here, when the detection terminal A and the detection terminal B detect that both the second connection terminal 67 and the second detection terminal 69, and the first connection terminal 66 and the first detection terminal 68 are electrically connected, It is determined that the wall surface 18a of the tube unit 11 is in contact with the wall surface 15a of the control unit.

  In such a state, it is determined that the arc center P ′ of the arc shape of the tube 50 coincides with the rotation center P of the cam 20, and the step motor 70 (not shown) can be driven by the control circuit unit 30. To make sure

  When both the second connection terminal 67 and the second detection terminal 69 and the first connection terminal 66 and the first detection terminal 68 are not electrically connected, the tube unit 11 and the control unit 12 are Then, it is determined that the tube unit 11 is not mounted at a predetermined position, and the tube unit 11 is mounted on the control unit 12 again.

  In this embodiment, the contact method is exemplified as the detector, but a light detection or magnetic detection structure can be adopted.

With such a configuration, when it is detected that the arc center P ′ of the arc shape of the tube 50 coincides with the rotation center P of the cam 20, the step motor 70 is driven, so that the tube 50 as set is set. Since it can be closed and released, the liquid can be transported at a desired flow rate per unit time.
(Embodiment 5)

  Next, a micro pump according to Embodiment 5 will be described with reference to the drawings. Embodiment 5 is characterized in that a battery as a power source is accommodated in a control unit. Therefore, the description will focus on the differences from the first embodiment.

  11A and 11B show a part of the micropump according to the fifth embodiment. FIG. 11A is a plan view, and FIG. 11B is a cross-sectional view taken along the line II of FIG. In FIG. 11, a small button type battery 120 (hereinafter simply referred to as a battery 120) as a power source is accommodated in the control unit 12.

  The battery 120 is mounted in a recess formed in the first machine casing 15, and the upper part is sealed and fixed by the battery lid 130. Here, when the illustrated lower surface of the battery 120 is a negative pole and the upper surface and side surfaces are positive poles, the lower surface is connected to the negative terminal 121 and the side surface is connected to the positive terminal 122.

  The minus terminal 121 and the plus terminal 122 are connected to a power supply terminal (not shown) of the control circuit unit 30 by a lead (not shown).

  The battery lid 130 has a battery guide 131 protruding so as to surround the outer periphery of the battery 120 and a flange 134. A screw 132 is formed on the outer periphery of the battery guide portion 131, and the battery 120 is fixed by being screwed into the screw portion of the second machine casing 16.

  A groove 133 is formed in the battery lid 130, and the battery lid 130 is opened and closed by inserting a coin or the like into the groove and rotating.

  When the battery lid 130 is screwed together, the joint portion between the collar portion 134 and the second machine casing 16 is brought into close contact. If packing as a sealing material is used between the flange portion 134 and the second machine casing 16, the sealing performance can be further improved.

  The structure for fixing the battery lid 130 may be a structure for press-fitting into the second machine casing 16. The battery lid 130 may have a bayonet structure. Moreover, it is good also as a structure which provides an opening part in the side surface of the 1st machine frame 15 and the 2nd machine frame 16, inserts the battery 120 from this opening part, and fixes it with the fixed frame fixing structure similar to the fixed frame 13. .

  By storing the battery 120 in the control unit 12 in this way, the battery can be replaced in a state where the tube unit 11 is mounted on the control unit 12 or in a state where the control unit 12 is a single unit.

  By accommodating the battery 120 in the control unit 12, the control circuit unit 30 and the battery can be connected without using the connection terminals 123 and 124 as in the third embodiment (see FIG. 9). Can be simplified.

  Further, by disposing the battery 120 in a space other than the range in which the tube unit 11 of the control unit 12 is mounted, the battery 120 can be made thicker than the configuration in which the battery 120 is mounted in the tube unit 11, so that the capacity is large. A battery can be employed.

  Furthermore, since the empty space of the tube unit 11 increases, the liquid capacity of the reservoir 14 can be increased accordingly.

  As described above, the micropump 10 according to Embodiments 1 to 5 described above can be reduced in size and thickness, and can stably flow continuously at a minute flow rate. It is suitable for medical use such as development of new drugs and drug delivery. Moreover, in various mechanical devices, it can be mounted in the device or outside the device and used for transporting fluids such as water, saline, chemicals, oils, fragrances, inks and gases. Furthermore, the micropump alone can be used for fluid flow and supply.

  DESCRIPTION OF SYMBOLS 10 ... Micro pump, 11 ... Tube unit, 12 ... Control unit, 13 ... Fixed frame, 14 ... Reservoir, 15 ... 1st machine frame, 16 ... 2nd machine frame, 17 ... 1st tube guide frame, 18 ... 2nd Tube guide frame, 20 ... cam, 30 ... control circuit, 40-46 ... finger, 50 ... tube, 70 ... step motor, 120 ... battery.

Claims (7)

A tube partially elastic in an arc shape, and
A plurality of fingers arranged radially from the arc center direction of the arc shape of the tube;
A guide frame in which a tube guide groove into which the tube is inserted is formed;
A tube guide wall that is provided between the plurality of fingers and regulates the position of the tube in a direction in which the plurality of fingers are disposed;
A cam that sequentially presses the plurality of fingers from the inflow side to the outflow side of the tube;
A drive unit for applying a rotational force to the cam;
A control circuit unit for controlling the driving of the driving unit;
A reservoir in communication with the inlet portion of the tube;
A power supply for supplying power to the control circuit unit,
A tube unit having at least the tube, the plurality of fingers, and the guide frame, and a control unit having at least the cam, the drive unit, and the control circuit unit are configured to be detachable .
The pump, wherein the power source is accommodated in the tube unit. The pump according to claim 1 , wherein
The pump characterized in that the tube guide wall is provided between each of the plurality of fingers. The pump according to claim 1 , wherein
The pump, wherein the guide frame holds the tube by the tube guide groove and holds the plurality of fingers. The pump according to any one of claims 1 to 3 ,
The pump characterized in that the tube guide wall is a protrusion formed on the guide frame for holding the plurality of fingers. The pump according to any one of claims 1 to 4 ,
The pump, wherein the reservoir is accommodated in the tube unit. It is configured to be detachable from a control unit having a cam, a drive unit that applies a rotational force to the cam, and a control circuit unit that performs drive control of the drive unit,
A tube partially elastic in an arc shape, and
A plurality of fingers arranged radially from the arc center direction of the arc shape of the tube;
A guide frame in which a tube guide groove into which the tube is inserted is formed;
A tube guide wall that is provided between the plurality of fingers and regulates the position of the tube in a direction in which the plurality of fingers are disposed;
A tube unit comprising a power supply for supplying power to the control circuit unit. The tube unit according to claim 6 ,
A tube unit containing a reservoir communicating with an inlet portion of the tube.

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