CN103974730B - Infusion pump - Google Patents
Infusion pump Download PDFInfo
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- CN103974730B CN103974730B CN201280057853.8A CN201280057853A CN103974730B CN 103974730 B CN103974730 B CN 103974730B CN 201280057853 A CN201280057853 A CN 201280057853A CN 103974730 B CN103974730 B CN 103974730B
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- Prior art keywords
- finger
- transfusion
- main finger
- tube
- main
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- 238000001802 infusion Methods 0.000 title claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000011144 upstream manufacturing Methods 0.000 claims description 54
- 230000002093 peripheral Effects 0.000 abstract description 40
- 239000000203 mixture Substances 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 19
- 230000001629 suppression Effects 0.000 abstract description 7
- 230000000875 corresponding Effects 0.000 description 29
- 238000007906 compression Methods 0.000 description 27
- 239000012530 fluid Substances 0.000 description 11
- 210000003746 Feathers Anatomy 0.000 description 6
- 101710004227 RPL31 Proteins 0.000 description 6
- 235000020127 ayran Nutrition 0.000 description 6
- 101710005408 RPL21 Proteins 0.000 description 4
- 101710004304 RPL22 Proteins 0.000 description 4
- 238000001574 biopsy Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000003550 marker Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000001186 cumulative Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010023204 Joint dislocation Diseases 0.000 description 1
- 241000272168 Laridae Species 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005057 finger movement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 230000000750 progressive Effects 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- 230000001225 therapeutic Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Abstract
A kind of infusion pump, main finger (21) is provided with the inclined plane (21a) relative to the oblique inclination of advance and retreat moving direction, and it is provided with, on secondary finger (23), the inclined plane (23a) can slided with the inclined plane (21a) of main finger (21), and be configured to the change (increase) of pair finger (23) and the overall width of tube for transfusion (T) when main finger (21) is advanced mobile and retreat in ratio, when main finger (21) retreats mobile, pair finger (23) is advanced in ratio with the change (reducing) of the overall width of tube for transfusion (T).By this composition, it is possible in the advance and retreat moving process of main finger (21), suppress to produce the situation in gap between front end and the outer peripheral face of tube for transfusion (T) of secondary finger (23).Thereby, it is possible to prevent the warpage of tube for transfusion (T), it is possible to the reduction of the flow accuracy of suppression conveying liquid.
Description
Technical field
The present invention relates to therapeutic medical medicinal liquid is injected into internal in the case of wait use infusion pump.
Background technology
As infusion pump, such as, there is finger pressing type (creeping motion type) infusion pump.Finger pressing type infusion pump is arranged in many at tube for transfusion
Under state between individual finger and pipe push plate (push plate), make each finger relative to tube for transfusion advance and retreat driving by each finger
Shape part conquassation tube for transfusion successively thus sends the infusion pump of the mode (total head (full press) mode) of conveying liquid.This
In the infusion pump of total head mode, the deflating (the flat deformation of tube for transfusion) of tube for transfusion can be produced, therefore exist in the unit interval
Conveying fluid flow reduce problem.
Technical scheme as the deflating reducing this tube for transfusion, it is proposed that middle pushing mode (semiclosed mode)
Infusion pump (for example, referring to patent documentation 1).In the infusion pump described in this patent documentation 1, can independently drive in pump machanism
Dynamic mode arranges multiple finger, pushes, for this in the way of only by the complete conquassation of upstream side and downstream of tube for transfusion
Tube for transfusion between upstream side and downstream, is not the most complete conquassation but crushes to, in way, thereby reduce collapsing of tube for transfusion
Flat situation.According to the infusion pump of this semiclosed mode, although conveying liquid can be improved compared with the infusion pump of total head mode
The reduction of flow, but situation that conveying fluid flow reduce cannot be completely eliminated.
As by the technology forcing to restore that collapses of pipe etc., have a following technology: include pushing pipe main finger and
(such as, the secondary finger that the side orthogonal with the press direction of this main finger moves up, restored pipe by secondary finger
With reference to patent documentation 2).In this technology, as the driving method of secondary finger, have pair finger via linkage
And it is linked to main finger and method that the driving with main finger drives secondary finger linkedly.It addition, drive as other
Method, has the method the most independently driven main finger and secondary finger and makes main finger and secondary finger the most convex
2 camshafts are linked by Timing Belt and drive main finger and the method etc. of secondary finger by wheel-drive mode.
Citation
Patent documentation
Patent documentation 1: No. 3595136 publications of Japanese Patent No.
Patent documentation 2: Japanese Unexamined Patent Publication 02-119690 publication
Patent documentation 3: Japanese Laid-Open Patent Publication 55-005485 publication
But, in the infusion pump with main finger and secondary finger, pair finger is linked to via linkage
In the method that main finger drives, it is difficult to make the movement of main finger and the movement of secondary finger become linear dependence, it is impossible to
With the deformation moving sets finger ordinatedly of tube for transfusion in the advance and retreat moving process of main finger.Thus, in main finger
In advance and retreat moving process, in any case all gap can be produced between front end and the outer peripheral face of tube for transfusion of secondary finger, therefore
There is tube for transfusion warpage (relative to warpage of the conveying direction carrying liquid) between the front end of main finger and pipe push plate
Situation.Once becoming this situation, the flow accuracy of conveying liquid will reduce.
It addition, in the above-mentioned method that main finger and secondary finger are the most independently driven with by camshaft difference
Drive in the method for main finger and secondary finger, there is the phase place between the movement of main finger and the movement of secondary finger
Situation about staggering, there is also the flow accuracy caused because of above-mentioned tube for transfusion warpage and reduces the situation becoming problem.And, at this
In a little methods, need main finger and secondary 2 drive systems of finger, there is the problem causing cost to uprise.
Summary of the invention
The present invention considers this practical situation and makes, and its object is to provide one can suppress to carry liquid
The infusion pump of the reduction of flow accuracy.
The present invention is a kind of infusion pump, and this infusion pump has and pushes tube for transfusion to carry conveying liquid in this tube for transfusion
Pump machanism, in this infusion pump, described pump machanism has: main finger, can arrange in the way of retreating relative to tube for transfusion,
And tube for transfusion is pushed when advancing mobile；Drive mechanism, makes described main finger move along advance and retreat direction；With secondary finger, only
Can in a direction orthogonal relative to the advance and retreat moving direction of described main finger enterprising retire dynamic.And, described master
Finger is provided with the inclined plane relative to the described oblique inclination of advance and retreat moving direction, and, described secondary finger is provided with
Can slide with the inclined plane of described main finger and make this pair finger edge by sliding with the inclined plane of this main finger
The inclined plane that a described orthogonal direction is moved, and be configured to: when described main finger is retreated mobile, this main finger
The inclined plane of inclined plane and described secondary finger slide, the movement of described secondary finger and described main finger is linkedly along institute
State an orthogonal direction to move.
Then, the effect of the present invention is described.
First, as shown in Figure 24 (A), if the external diameter (diameter) of the tube for transfusion T of positive round state is set to d, then its circumference
For d π.On the other hand, as shown in Figure 24 (B), if conquassation tube for transfusion T and this conquassation amount is set to Δ d, then the circular arc of tube for transfusion T
Portion's a length of [(d-Δ d) π], line part length W1 of tube for transfusion T is
W1=[d π-(and d-Δ d) π]/2=Δ d pi/2.And, overall width W2 of tube for transfusion T is
W2=Δ d pi/2+(d-Δ d)=(pi/2-1) Δ d+d ... (1).
From this numerical expression (1), overall width W2 of tube for transfusion T and conquassation amount Δ d are that ratio (assumes the girth of tube for transfusion
Constant).That is, in the shift position (conquassation amount) relative to maximum going-back position of main finger and become because of this main finger
Between the overall width (width of the part including the front end of secondary finger) of the tube for transfusion T of shape, there is ratio example relation.
Be conceived to this point and in the present invention, make secondary finger with because the tube for transfusion that is mobile and that deform of retreating of main finger
Overall width change retreat linkedly movement.
Specifically, main finger is arranged inclined plane (this inclination mask relative to the oblique inclination of advance and retreat moving direction
Have the inclination angle of the relation considering above-mentioned numerical expression (1)), and, being provided with in secondary finger can be with the inclination of main finger
The inclined plane slided in face.And, it is configured to, when main finger is advanced mobile, the overall width of secondary finger and tube for transfusion
Change (increase) retreats movement in ratio, and when main finger retreats mobile, secondary finger and the overall width of tube for transfusion
Change (reducing) advance in ratio movement.By this composition, it is possible in the advance and retreat moving process of main finger, suppression
The situation in gap is produced, therefore, it is possible to prevent tube for transfusion at main finger between front end and the outer peripheral face of tube for transfusion of secondary finger
Warpage between front end and the pipe push plate of shape part.Thereby, it is possible to improve the flow accuracy of conveying liquid.
And, make secondary finger move by the slip (slip of inclined plane) between main finger and secondary finger, because of
This, the drive system only one of which (drive system of the most main finger) of finger, it is possible to seek the reduction of cost.Separately
Outward, and above-mentioned conventional driving method, the method i.e. main finger and secondary finger the most independently driven and pass through camshaft
The method driving main finger and secondary finger respectively is compared, and also has and is not easy in the movement of main finger and secondary finger
Movement between produce the advantage of phase shift.
In the present invention, it is preferably configured as, when main finger is in maximum going-back position, the front-end configuration of this main finger
In the position corresponding with the outer peripheral face of tube for transfusion, and, the front-end configuration of secondary finger is corresponding at the outer peripheral face with tube for transfusion
Position.
In the present invention, it is also possible to for, relative to main finger, one secondary finger is set.Furthermore it is also possible to be, relative to
Main finger arranges 2 secondary finger.In this case, main finger is provided with relative to advance and retreat moving direction with phase each other
Instead towards the pair of angled face of the gradually-reducing shape tilted, and, it being provided with a pair secondary finger, this pair secondary finger has can
The inclined plane slided with each inclined plane of this main finger.
In the present invention, it is also possible to be configured to, have the inclined plane towards main finger that tilts of secondary finger is pushed
Elastomeric element (such as, compression helical spring), when main finger retreats, make secondary finger-like by the elastic force of described elastomeric element
The inclined plane of part presses against in the inclined plane of main finger, so that the inclined plane of the inclined plane of main finger and secondary finger is sliding
Dynamic.
Furthermore it is also possible to arrange the link mechanism main finger and secondary finger linked sliding freely, and it is configured to
When main finger retreats mobile, made inclined plane and the inclination of secondary finger of main finger by the described link linking mechanism
Slide in face.In this case, T-slot and the mechanism of T-shaped slide block combination and dovetail groove and swallow can be listed as link mechanism
The mechanism etc. of tail type slide block combination.
Concrete composition as the present invention, it is possible to list the upstream side of the conveying direction of conveying liquid in main finger
With composition (the pump machine of the most semiclosed mode that downstream is respectively provided with finger valve tube for transfusion opening and closing closed freely
Structure).In this case, a main finger can be set between upstream side finger valve and downstream finger valve, it is also possible to set
Put multiple main finger.If configuring multiple main finger between upstream side finger valve and downstream finger valve, then can reduce
The pulsation occurred when liquor charging.
Concrete composition as other, it is possible to list following composition, i.e. pump machanism has: multiple main finger, it is possible to
Retreat relative to tube for transfusion mobile, and push tube for transfusion when advancing mobile；And drive mechanism, make multiple described main finger edge
Advance and retreat direction is the most independently moved, this pump machanism for by relative to tube for transfusion retreat drive each described main finger and with wriggle
The mode of motion sends the pump machanism (the such as pump machanism of total head mode) of conveying liquid, relative to each main finger-like of this pump machanism
Part is respectively equipped with described secondary finger.
The effect of invention
According to the present invention, owing to, in the infusion pump with main finger and secondary finger, main finger being provided with phase
The inclined plane of inclination oblique for advance and retreat moving direction, and, being provided with in secondary finger can be with the inclined plane of main finger
The inclined plane slided, so, in the advance and retreat moving process of main finger, the change of the overall width of secondary finger and tube for transfusion
Move linkedly.Thereby, it is possible to suppress the reduction of the flow accuracy of the conveying liquid caused because of the warpage of tube for transfusion.
Accompanying drawing explanation
Fig. 1 is the stereoscopic figure of an example of the infusion pump representing the present invention.
Fig. 2 is the schematic configuration diagram of an example of the infusion pump representing the present invention.In this Fig. 2, represent that the door of infusion pump is opened
State.
Fig. 3 is the front view of the pump machanism being useful in the infusion pump of Fig. 1.Additionally, in figure 3 biopsy cavity marker devices is represented.
Fig. 4 is the X-X direction view of Fig. 3.Additionally, in the diagram biopsy cavity marker devices is represented.
Fig. 5 is side valve portion, upstream, pipe pressing portion and the side view of downstream side valve constituting pump machanism.
Fig. 6 is only to extract the main finger and secondary finger that constitute pipe pressing portion out represent axonometric chart.
Fig. 7 is the action specification figure of the pump machanism shown in Fig. 5.
Fig. 8 is the action specification figure of the pump machanism shown in Fig. 5.
Fig. 9 is main finger and the action specification figure of secondary finger of the pipe pressing portion shown in Fig. 4.
Figure 10 is main finger and the action specification figure of secondary finger of the pipe pressing portion shown in Fig. 4.
Figure 11 is the sectional view representing the example linking mechanism main finger and secondary finger linked sliding freely.
Figure 12 is the figure of the major part composition of other examples of the infusion pump representing the present invention.
Figure 13 is main finger and the action specification figure of secondary finger of the pipe pressing portion shown in Figure 12.
Figure 14 is main finger and the action specification figure of secondary finger of the pipe pressing portion shown in Figure 12.
Figure 15 is the schematic configuration diagram of other examples of the infusion pump representing the present invention.Infusion pump is represented in this Figure 15
The state that door is opened.
Figure 16 is the front view of the pump machanism being useful in the infusion pump of Figure 15.Additionally, in figure 16 by biopsy cavity marker devices table
Show.
Figure 17 is the sectional view of the composition representing the pump machanism in the infusion pump being useful in Figure 15.Additionally, Figure 17 represents use
The sectional view of face cutting along the camshaft of pump machanism.
Figure 18 is the Y-direction view of Figure 16.Additionally, in figure 18 biopsy cavity marker devices is represented.
Figure 19 is the action specification figure of the main finger of the infusion pump of Figure 15.Additionally, Figure 19 be by each main finger with
The sectional view of the face cutting that camshaft is orthogonal.
Figure 20 is the action specification figure of the pump machanism shown in Figure 17.
Figure 21 is the action specification figure of the pump machanism shown in Figure 17.
Figure 22 is main finger and the action specification figure of secondary finger of the pipe pressing portion shown in Figure 18.
Figure 23 is main finger and the action specification figure of secondary finger of the pipe pressing portion shown in Figure 18.
Figure 24 is the explanatory diagram of the relation between conquassation amount Δ d and overall width W2 of tube for transfusion.
Figure 25 is the explanation at the angle of inclination of the inclined plane of the main finger of the pipe pressing portion shown in Fig. 4 and secondary finger
Figure.
Figure 26 is saying of the angle of inclination of the inclined plane of the main finger of the pipe pressing portion shown in Figure 12 and secondary finger
Bright figure.
Detailed description of the invention
Hereinafter, based on accompanying drawing, embodiments of the present invention are described.
[embodiment 1]
One example of the infusion pump of the present invention is described with reference to Fig. 1～Figure 10.
The infusion pump that infusion pump 1 is semiclosed mode of this example, has pump main body (housing) 11 and by this pump main body 11
The door 12 that front-surface side (pipe installation site) is closed.Door 12 swings via hinge 13,13 and freely (rotatable) is bearing in pump
In main body 11, and can from by position completely enclosed for the front-surface side of pump main body 11 to fully open position (such as, 180 °
Open position) between swing.
Pump main body 11 and door 12 are provided with the door lock mechanism 14 for keeping this closed state when being closed by door 12.
Door lock mechanism 14 is made up of door lock rod 141 and hook part 142 etc., the rotating operation door lock rod when being closed by door 12
141 and be hooked on hook part 142, it is possible to door 12 is locked as closed state.
Pump main body 11 is provided with pipe guide portion (guiding groove) 111 is installed.Pipe installs guide portion 111 from carrying the defeated of liquid
The upstream side sending direction includes upstream side guide portion 111a successively, expands as the pumping section of rectangle from this upstream side guide portion 111
111b and downstream guide portion 111c.The upstream side finger valve 31 of pump machanism 2 described later, main finger 21, a pair secondary finger-like
Part 23,23 and downstream finger valve 41 are facing to pumping section 111b.Additionally, in the front surface wall 110 of pump main body 11, with
The position of secondary finger 23,23 correspondence of main finger 21 and a pair is provided with peristome 110a, it addition, with upstream side finger-like
It is respectively equipped with peristome 110b, 110c on the position of valve 31 and downstream finger valve 41 correspondence.
Pipe is installed upstream side guide portion 111a of guide portion 111 and is formed with curved shape (meander-shaped) in the horizontal.Separately
Outward, downstream guide portion 111c in the downstream of pumping section 111b is formed as the shape extended in the vertical direction with linearity.On
The well width of the well width of trip side guide 111a and downstream guide portion 111c in downstream is respectively and is connected to medicinal liquid
The size that the external diameter of tube for transfusion (such as, polrvinyl chloride or the polybutadiene system) T on bag is corresponding, by being embedded in tube for transfusion T
In these upstream side guide portion 111a and downstream guide portion 111c, it is possible to tube for transfusion T is arranged in infusion pump 1.
Upstream side guide portion 111a is provided with pepe gripper 112.Pepe gripper 112 is to be installed to infusion pump 1 by pipe
Time parts that tube for transfusion T is temporarily held, after pipe is installed and when door 12 is turned off, clamping is automatically released.Additionally, at pipe
Holder bar (not shown) it is provided with, when the installation of tube for transfusion T, by operating this holder bar and energy near clamper 112
Enough make pepe gripper 112 for open state.
Inner surface side at door 12 is provided with pipe push plate 6.Pipe push plate 6 be located at pump machanism 2 (upstream side finger valve 31,
Main finger 21 and downstream finger valve 41 etc.) on corresponding position.This pipe push plate 6 when door 12 is closed, phase
For be in maximum going-back position state under main finger 21 and the front end of each finger valve 31,41 to separate and tube for transfusion
The mode at the interval that the external diameter of T is corresponding is relative.Additionally, pipe push plate 6 keeps on the substrate 62 across buffer substrate tablet 61 (with reference to figure
4 etc.).
When being arranged in the infusion pump 1 of above composition by tube for transfusion T, open door 12, and defeated by be connected with medicinal fluid bag
Liquid pipe T is suitable with [upstream side guide portion 111a] → [pepe gripper 112] → [pumping section 111b] → [downstream guide portion 111c]
Sequence embeds, and thus installs tube for transfusion T.After such pipe installation, door 12 is closed, and by door lock mechanism 14 by door 12
It is locked in closed state, thus completes the setting of tube for transfusion T.Additionally, in this example, as described above, door 12 is being closed
State under make the pepe gripper 112 of upstream side guide portion 111a open.It addition, after transfusion completes etc., door 12 is being opened
Time, make tube for transfusion T close by pepe gripper 112, thus prevent carrying freely falling of liquid and i.e. flow freely (free
flow)。
-pump machanism-
Then, the object lesson of pump machanism 2 is described with reference to Fig. 3～Fig. 6.
Pump machanism 2 has pipe pressing portion 20, side valve portion, upstream 30 and downstream side valve portion 40 etc..
Pipe pressing portion 20 by main finger 21, actuator 22, pair of right and left pair finger 23,23, slidably supported parts 24,
24 and compression helical spring 25,25 etc. constitute.
Main finger 21 be cross section be the parts of rectangle, the side of left and right is provided with pair of angled face 21a, 21a.This is one years old
To inclined plane 21a, 21a be relative to the advance and retreat moving direction of main finger 21 (central shaft CL1 direction) with opposite each other towards
The inclined plane tilted, is as tending to the front end of main finger 21 and the inclined plane of gradually-reducing shape that two distance between the surface reduce.This is main
Inclined plane 21a of finger 21,21a are inclined plane facing opposite to each other, but its angle of inclination is (relative to central shaft CL1's
Angle of inclination) identical.Angle of inclination about these inclined planes 21a, 21a will be in rear explanation.
Main finger 21 make its central shaft CL1 along direction before and after said pump main body 11 (be arranged in pump main body 11
The orthogonal direction (direction orthogonal with the front surface wall 110 of pump main body 11) of the length direction of tube for transfusion T) configuration.Main finger-like
Part 21 is bearing on guide member 5 (with reference to Fig. 5) sliding freely such that it is able to before and after said pump main body 11, retreat in direction
Mobile.Guide member 5 supporting and fixing is in pump main body 11.
The rearward end of main finger 21 is linked with actuator 22.Main finger is made by the driving of this actuator 22
21 retreat mobile (advance mobile or retreat mobile), when main finger 21 is positioned at maximum going-back position, such as Fig. 4 and Fig. 5
Shown in, outside the tube for transfusion T (positive round state) that the front end face 21b of main finger 21 is arranged in and is arranged in said pump main body 11
On the position (position corresponding with the outer peripheral face of tube for transfusion T) of circumferential contact.If it addition, main finger 21 (is positioned at from this state
The state of maximum going-back position) advance and move, then in its advance moving process, push tube for transfusion T.Here, the infusion pump of this example
1 is semiclosed mode, therefore, sets the stroke of the movement of retreating of the main finger 21 realized by actuator 22 so that
When main finger 21 is positioned at the state of most advanced, as shown in Fig. 8 (A) and Fig. 9 (C), completely enclose tube for transfusion T.
As actuator 22, such as, can list the cam driving main finger 21 and rotation its cam of driving of retreating
Mechanism (for example, referring to Figure 19) that the motor of axle combines, by motor and rotation-parallel moving mechanism (such as rack pinion)
The mechanism combined.It addition, can list using solenoid as drive source actuator etc..
A pair secondary finger 23,23 is arranged in the side (across the both sides of main finger 21) of main finger 21.A pair secondary
Finger 23,23 is of similar shape, size, symmetrically configures.Each secondary finger 23,23 be cross section be the portion of rectangle
Part, its leading section (end of main finger 21 side) be provided with inclined plane 21a with above-mentioned main finger 21,21a slide incline
Inclined-plane 23a, 23a.Angle of inclination about inclined plane 23a of this pair finger 23,23,23a will be in rear explanation.
Secondary finger 23,23 makes its central shaft CL2 along orthogonal for the central shaft CL1 direction with above-mentioned main finger 21
(direction parallel with the front surface wall 110 of pump main body 11) configures.It addition, be provided with along central shaft in secondary finger 23,23
Bullport 23c, 23c that CL2 extends.The internal diameter of this each bullport 23c, 23c is set as, with guiding bar 242,242 described later
External diameter compares the biggest ormal weight, and secondary finger 23,23 can be slided relative to guiding bar 242,242.In each bullport 23,23
It is provided with keyway 23d, the 23d that can slide for feather key 243,243 described later.
Secondary finger 23,23 is bearing on slidably supported parts 24,24 sliding freely.Slidably supported parts 24,24
Base member 241,241 and guiding bar 242,242 are integrally provided.Guide the center of bar 242,242 along central shaft CL2.The end
Base member 241,241 supporting and fixing is in pump main body 11.
It is machined with keyway 242a, 242a guiding on bar 242,242, is embedded in feather key at this keyway 242a, 242a
243、243.Bar 242,242 is guided to be inserted in bullport 23c, 23c of above-mentioned secondary finger 23,23, and, guiding bar 242,
The feather key 243,243 of 242 is inserted in keyway 23d, 23d of bullport 23c, 23c.Thus, limit secondary finger 23,23 with
Guiding bar 242,242 be the movement (rotation) of axle, pair finger 23,23 can only relative to guiding bar 242,242 axial,
The square upward sliding that the direction (pipe press direction) of the movement of retreating of the most main finger 21 is orthogonal moves (retreating mobile).
And, between the rear end face and base member 241,241 of above secondary finger 23,23, sandwiched compression spiral
Spring (elastomeric element) 25,25, pushes secondary finger by the elastic force of this compression helical spring 25,25 towards main finger 21
23,23, inclined plane 23a of this pair finger 23,23,23a are respectively to be pushed on inclined plane 21a of main finger 21,21a
State abut with it.
So, compression helical spring 25,25 pushing secondary finger 23,23, thus, main finger 21 is given up the throne after maximum
During putting movement of retreating between most advanced, with inclined plane 21a, 21a and the secondary finger of this main finger 21
23, inclined plane 23a, the state of 23a contact of 23 is slided, and secondary inclined plane 23a of finger 23,23,23a will not be from main finger
Inclined plane 21a, the 21a of 21 leave, and the advance and retreat of secondary finger 23,23 and main finger 21 move and move linkedly.
Specifically, when main finger 21 is advanced mobile, inclined plane 21a of main finger 21,21a and secondary finger 23,
Inclined plane 23a, the 23a of 23 slide, and each secondary finger 23,23 and the movement of main finger 21 retreat (a pair secondary finger-like linkedly
Part 23,23 with away from one another towards movement).On the other hand, when main finger 21 retreats mobile, by compression helical spring 25
Elastic force push secondary finger 23,23 towards main finger 21, make inclined plane 21a of this main finger 21,21a and secondary finger
23, inclined plane 23a, the 23a of 23 slides, so that the movement of each secondary finger 23,23 and main finger 21 advances (one linkedly
To secondary finger 23,23 with close towards movement).
-angle of inclination of finger inclined plane-
Then, with reference to Figure 25, inclined plane 21a of above-mentioned main finger 21 and inclined plane 23a of secondary finger 23 are described
Angle of inclination.
First, when the external diameter (diameter) of the tube for transfusion T of positive round state is set to d, the conquassation amount of tube for transfusion T is set to Δ d
Time, as it has been described above, overall width W2 of tube for transfusion T is [W2=(pi/2-1) Δ d+d].It addition, the inclined plane of main finger 21
Angle of inclination (relative to the angle of inclination of the central shaft CL1) θ 1 of 21a, 21a can be expressed as [tan θ 1=s1/ Δ d].
Here,
S1=W2/2-d/2=[(pi/2-1) Δ d+d]/2-d/2=(pi/2-1) Δ d/2,
Tan θ 1 is
Tan θ 1=[(pi/2-1) Δ d/2]/Δ d=π/4-1/2.
And, θ 1 is
θ 1=tan-1(π/4-1/2)=15.9 °.
According to this result of calculation, main inclined plane 21a of finger 21, the angle of inclination of 21a are set to " 15.9 ° ", will be with
Inclined plane 23a of secondary finger 23,23, the angle of inclination of 23a that inclined plane 21a of this main finger 21,21a slide are (relative
The angle of inclination of central shaft CL1 in main finger 21) be also set to " 15.9 ° ", thus, secondary finger 23,23 with because of main finger-like
The change [(pi/2-1) Δ d+d] of the overall width of the tube for transfusion T moved and deform that retreats of part 21 is mobile (to CL2 in ratio
Direction is moved) such that it is able in the advance and retreat moving process of main finger 21, suppress the front end face 23b in secondary finger 23,23,
The situation in gap is produced between the outer peripheral face of 23b and tube for transfusion T.In addition.The movement of retreating of pair of right and left pair finger 23,23
Amount of movement Δ α is identical, change [(pi/2-1) Δ d+ of the overall width of this amount of movement of 2 times (2 × Δ α) and tube for transfusion T
D] in ratio.
Here, the angle of inclination of inclined plane 23a of inclined plane 21a of main finger 21 and secondary finger 23 can be accurate
Ground is set to " 15.9 ° ", it addition, for example, it is also possible to be 16 ° ± β (β is tolerance).
-valve portion-
Then, with reference to explanation side valve portion, upstream 30 and downstream side valve portions 40 such as Fig. 3 and Fig. 5.
First, upstream side valve portion 30 is made up of upstream side finger valve 31 and actuator 32 etc..
Upstream side finger valve 31 is located at the upstream side of the conveying direction of the conveying liquid of above-mentioned main finger 21.Upstream side refers to
Shape valve 31 be cross section be the parts of rectangle, along parallel for the central shaft CL1 direction configuration with above-mentioned main finger 21.It addition,
Fore-end at upstream side finger valve 31 is provided with teat 31a.
Upstream side finger valve 31 is bearing in guide member 5 (guide member identical with main finger 21) sliding freely
On, in the same manner as above-mentioned main finger 21, it is possible to before and after pump main body 11, direction is (with the front surface wall 110 of pump main body 11 just
The direction handed over) retreat and move.
Rearward end at upstream side finger valve 31 is linked with actuator 32.Upstream side is made by the driving of this actuator 32
Finger valve 31 is retreated mobile (advance mobile or retreat mobile), when upstream side finger valve 31 is in maximum going-back position, as
Shown in (A) of Fig. 5 and Fig. 7, the front end (front end of teat 31a) of upstream side finger valve 31 is arranged in and is installed on said pump master
The position (position corresponding with the outer peripheral face of tube for transfusion T) of the outer peripheral face contact of the tube for transfusion T (positive round state) on body 11.Separately
Outward, when upstream side finger valve 31 advances mobile from this state (being positioned at the state of maximum going-back position), it is moved through in its advance
Journey pushes tube for transfusion T, as shown in (B) of Fig. 7, when upstream side finger valve 31 arrives most advanced, transfusion
Pipe T completely encloses.
As the actuator 32 of this upstream side finger valve 31, can list equally and such as upstream side finger valve 31 will be entered
Advance and move back the cam of driving and its camshaft is carried out and rotate mechanism that the motor driven combines (for example, referring to figure
19) mechanism and by motor and rotation-parallel moving mechanism (such as rack pinion) combined.It addition, can list spiral shell
Spool is as the actuator etc. in the source of driving.
It addition, downstream side valve portion 40 is made up of downstream finger valve 41 and actuator 42 etc..
Downstream finger valve 41 is located at the downstream of the conveying direction of the conveying liquid of above-mentioned main finger 21.Downstream refers to
Shape valve 41 be cross section be the parts of rectangle, along parallel for the central shaft CL1 direction configuration with above-mentioned main finger 21.It addition,
Fore-end at downstream finger valve 41 is provided with teat 41a.
Downstream finger valve 41 is bearing in guide member 5 (guide member identical with main finger 21) sliding freely
On, similarly can be (orthogonal with the front surface wall 110 of pump main body 11 along direction before and after pump main body 11 with above-mentioned main finger 21
Direction) retreat mobile.
Rearward end at downstream finger valve 41 is linked with actuator 42.Downstream is made by the driving of this actuator 42
Finger valve 41 is retreated mobile (advance mobile or retreat mobile), when downstream finger valve 41 is positioned at maximum going-back position, as
Shown in (C) of Fig. 7, the front end (front end of teat 41a) of downstream finger valve 41 is arranged in and is installed in said pump main body 11
Tube for transfusion T (positive round state) outer peripheral face contact position (position corresponding with the outer peripheral face of tube for transfusion T) on.It addition, work as
Downstream finger valve 41, when this state (being positioned at the state of maximum going-back position) is advanced mobile, pushes away in its advance moving process
Pressure infuser pipe T, as shown in Fig. 8 (B), when downstream finger valve 41 arrives most advanced, tube for transfusion T seals completely
Close.
As the actuator 42 of this downstream finger valve 41, can list equally and such as downstream finger valve 41 will be entered
Advance and move back the cam of driving and its camshaft is carried out and rotate mechanism that the motor driven combines (for example, referring to figure
19) mechanism and by motor and rotation-parallel moving mechanism (such as rack pinion) combined.It addition, can list spiral shell
Spool is as the actuator etc. in the source of driving.
The above actuator 22 of main finger 21, the actuator 32 of upstream side finger valve 31 and downstream finger valve
The each driving of the actuator 42 of 41 is controlled by control portion 7.Additionally, the battery in being built in infusion pump 1 or source power supply pair
Each actuator 22,32,42 (motor etc.) supply electric power.
Here, at the actuator 22 of main finger 21, the actuator 32 of upstream side finger valve 31 and downstream finger valve
The actuator 42 of 41 is to drive carrying out each finger 21,31,32 retreating the cam driven and its camshaft carrying out rotation
The mechanism that combines of motor in the case of, it is also possible to using the camshaft of each actuator 22,32,42 as general axle,
Carried out rotating driving to this camshaft by a motor.
-control portion-
Control portion 7 is constituted based on microcomputer etc..Although not shown, connect but in control portion 7 have right
The bubble being mixed into the tube for transfusion T being arranged in pump main body 11 carries out air bubble sensor (such as, the supersonic sensing detected
Device), detection the opening and closing sensor of closed state etc. of door 12, range sensor etc., the output signal of these each sensors is to control
Portion 7 processed inputs.
Additionally, above-mentioned range sensor is the main finger that detection is positioned at maximum going-back position under the closed state of door 12
The sensor at the interval (distance) between front end face 21b and the pipe push plate 6 of door 12 side of 21.Such as can as range sensor
Enough list the photoelectric sensor of reflection-type, static capacity type sensor and ultrasonic sensor etc..
Control portion 7 is according to set (input) by the operation of the guidance panel 122 (with reference to Fig. 1) of display operating portion 120
Conveying fluid flow (in the unit interval conveying liquid conveying capacity) setting value, control pump machine by action described later
Each actuator 22,32,42 of structure 2, and, control the cycle (aftermentioned) of its liquor charging circulation, thus come to adjust conveying liquid changeably
Body flow.In the present example, in the range of 1mL/h～1200mL/h with [1mL/h] can be by conveying fluid flow such as
Unit sets.
And, control portion 7 is configured to show " conveying fluid flow (note on the display floater 121 of display operating portion 120
Enter amount) " and the action message such as " inject cumulative time ", it addition, also comprise " bubble is mixed into exception ", " door is opened " etc. in display
While various warnings, make warning boom unit action.
-action specification of pump machanism-
Then, the action of pump machanism 2 is described with reference to Fig. 7 and Fig. 8.Additionally, in Fig. 7 and Fig. 8, with the shape not blocked
State represents each finger.
[S1] first, the state of (A) of Fig. 7 represents and is installed to tube for transfusion T close in pump main body 11 and by door 12
The figure of state (original state).In the initial condition, the downstream finger valve 41 in only downstream side valve portion 40 is positioned at maximum advance
Position, completely encloses tube for transfusion T by the teat 41a of this downstream finger valve 41.
Upstream side finger valve 31, from the actuator 32 of the state-driven upstream side finger valve 31 of (A) of Fig. 7, is moved by [S2]
To most advanced, thus by the upstream side (upstream of the conveying direction of conveying liquid of the main finger 21 of pipe pressing portion 20
Side) tube for transfusion T completely enclosed ((B) of Fig. 7).
[S3], as shown in (C) of Fig. 7, drives the actuator 42 of downstream finger valve 41, will be located in most advanced
Downstream finger valve 41 moves to maximum going-back position, thus by the downstream (conveying direction of conveying liquid of main finger 21
Downstream) tube for transfusion T open.
[S4] from the actuator 22 of the main finger of the state-driven shown in (C) of Fig. 7 21, before making main finger 21 and then push away
Pressure infuser pipe T ((A) of Fig. 8).By the pushing of the tube for transfusion T that this main finger 21 is carried out, make the conveying liquid in tube for transfusion T
Body downstream side is sent.Here, owing to the infusion pump 1 of this example is semiclosed mode, therefore, even if main finger 21 arrives maximum
Progressive position, as shown in (A) of Fig. 8 and (C) of Fig. 9, tube for transfusion T is not the most by complete conquassation.
Downstream finger valve 41, from the actuator 42 of the state-driven downstream finger valve 41 of (A) of Fig. 8, is moved by [S5]
To most advanced, thus the tube for transfusion T in the downstream of main finger 21 is completely enclosed ((B) of Fig. 8).
Upstream side finger valve 31, from the actuator 32 of the state-driven upstream side finger valve 31 of (B) of Fig. 8, is moved by [S6]
To maximum going-back position, thus the tube for transfusion T of the upstream side of main finger 21 is open ((C) of Fig. 8).
Main finger 21, from the actuator 22 of the main finger of state-driven 21 of (C) of Fig. 8, is moved to maximum by [S7]
Give up the throne and put, thus be back to the original state shown in (A) of Fig. 7.
A circulation of liquor charging is completed, by being repeated in this circulation, it is possible to downstream side by above action
Send the conveying liquid in tube for transfusion T continuously.And, this conveying fluid flow can be by controlling the week of above-mentioned liquor charging circulation
Phase adjusts changeably.
-action specification of main finger and secondary finger-
Then, illustrate to constitute the main finger 21 of pipe pressing portion 20 and a pair secondary finger with reference to Fig. 9 and Figure 10
23, the action of 23.Additionally, in Fig. 9 and Figure 10, push finger 21 etc. with the state representation do not blocked.
[S11] first, as shown in (A) of Fig. 9, when main finger 21 is positioned at maximum going-back position (initial position), is somebody's turn to do
Outside the front end face 23b, 23b of the front end face 21b of main finger 21 and a pair secondary finger 23,23 is arranged in tube for transfusion T
The position (position corresponding with the outer peripheral face of tube for transfusion T) of circumferential contact.It addition, the outer peripheral face of pipe push plate 6 and tube for transfusion T connects
Touch.
[S12] makes main finger when the actuator 22 (with reference to Fig. 4) from the main finger of state-driven 21 of (A) of Fig. 9
21 advance time, tube for transfusion T by main finger 21 front end face 21b push and tube for transfusion T by conquassation ((B) of Fig. 9).It addition,
During the advance of main finger 21, by inclined plane 21a of this main finger 21,21a and the inclination of each secondary finger 23,23
Slip between face 23a, 23a, each secondary finger 23,23 is at direction (central shaft Fig. 4 shown in orthogonal with pipe press direction
CL2 direction) on by opposing compression helical spring 25,25 elastic force in the way of move (retrogressing).Now, due to a pair secondary finger
23,23 as described above with because the mobile and overall width of the tube for transfusion T that deforms of advancing (whole shown in Figure 25 of main finger 21
Body width: (pi/2-1) Δ d+d)) change (increase) mobile in ratio (retrogressing), therefore, main finger 21 advance move
During Dong, the front end face 23b, 23b of secondary finger 23,23 are arranged in corresponding with the outer peripheral face of tube for transfusion T (side) all the time
On position.
[S13], when main finger 21 is advanced further from the state of (B) of Fig. 9 and arrives most advanced, infuses
Pipe T is pushed further and is become the state shown in Fig. 9 (C).That is, even if main finger 21 is positioned at most advanced, transfusion
Pipe T is also at not by the state (semi-closed state) of complete conquassation, therefore, it is possible to the deflating of suppression tube for transfusion T.It addition,
Such main finger 21 during most advanced moves, a pair secondary finger 23,23 also with the entirety of tube for transfusion T
The change (increase) mobile in ratio (retrogressing) of width, therefore, when main finger 21 arrives most advanced,
The front end face 23b, 23b of each secondary finger 23,23 are arranged in the position corresponding with the outer peripheral face (side) by the tube for transfusion T of conquassation
Put.
Additionally, the step of [S12] and [S13] (advance of main finger 21 is moved) is corresponding with above-mentioned steps [S4]
's.
[S14] by main finger 21 from the state (most advanced) of (C) of Fig. 9 to contrary with when pushing towards driving
Move and make main finger 21 retreat.Along with the retrogressing of this main finger 21 is moved, it is in by the tube for transfusion T of conquassation state by it
Manage the recuperability (elastic force) of self and recover ((A) of Figure 10) to shape originally.
Here, secondary inclined plane 23a of finger 23,23,23a are pressed against by the elastic force of compression helical spring 25,25
On inclined plane 21a of main finger 21,21a, thus maintain and inclined plane 21a of this main finger 21, the sliding mode of 21a,
Therefore, when main finger 21 retreats mobile, a pair secondary finger 23,23 is moved by the elastic force of compression helical spring 25,25
Dynamic (advance).Now, a pair secondary finger 23,23 with deform the tube for transfusion T of (recovery) because the retrogressing of main finger 21 is moved
The change (reducing) of overall width (overall width shown in Figure 25: (pi/2-1) Δ d+d)) proportionally advance, therefore,
In the retrogressing moving process of main finger 21, the front end face 23b, 23b of secondary finger 23,23 be arranged in all the time with in recuperation
Position corresponding to the outer peripheral face (side) of tube for transfusion T on.Thus, even if under the situation that the reset condition of tube for transfusion T is bad,
Owing to the side of this tube for transfusion T is pushed by secondary finger 23,23, therefore, tube for transfusion T also is able to restore.
[S15], when main finger 21 retreats further from the state of (A) of Figure 10 and arrives maximum going-back position, becomes
The state shown in (B) of Figure 10.That is, tube for transfusion T is restored to shape (substantially positive round shape) originally completely.It addition, so
Main finger 21 during maximum going-back position moves, a pair secondary finger 23,23 also with the overall width of tube for transfusion T
Change (reducing) mobile in ratio, therefore, when main finger 21 arrives maximum going-back position, secondary finger
23, front end face 23b, 23b of 23 is arranged in the position corresponding with the outer peripheral face (side) of the tube for transfusion T restored.Thus, though
Under the situation that the reset condition of tube for transfusion T is bad, the side of this tube for transfusion T also is able to be pushed forcibly by secondary finger 23,23,
Therefore, it is possible to make tube for transfusion T restore to substantially positive round state.Additionally, the step of [S14] and [S15] is (after main finger 21
Retire dynamic) it is corresponding with above-mentioned step [S7].
As it has been described above, according to the infusion pump 1 of this example, in the advance and retreat moving process of main finger 21, a pair secondary finger
23,23 is mobile in ratio with the change of the overall width of tube for transfusion T, therefore, it is possible to suppression is in the front end of each secondary finger 23,23
The situation in gap is produced between the outer peripheral face (side) of face 23b, 23b and tube for transfusion T.Thereby, it is possible to prevent tube for transfusion T at main finger
Warpage between front end face 21b and the pipe push plate 6 of shape part 21, it is possible to increase the flow accuracy of conveying liquid.
And, make secondary finger-like by the slip (slip of inclined plane) between main finger 21 and secondary finger 23,23
Part 23,23 moves, and therefore, the drive system of finger is realized by a system (drive system of the most main finger 21),
The reduction of cost can be sought.With above-mentioned conventional driving method, will main finger and secondary finger the most independently drive
Method with driven the method for main finger and secondary finger to compare respectively by camshaft, also there is the shifting of main finger 21
The movement of dynamic and secondary finger 23,23 is not easy the advantage producing phase shift.
Additionally, in the above embodiment, it is also possible to guide member is set, to avoid producing main finger 21 and secondary finger
23, the dislocation between 23 (is arranged on the dislocation on the length direction of the tube for transfusion T in pump main body 11 (on the above-below direction of Fig. 3
Dislocation)).
Here, in the above embodiment, between upstream side finger valve 31 and downstream finger valve 41, a main finger-like it is provided with
Part 21, but the present invention is not limited to this, it is also possible to multiple master is set between upstream side finger valve 31 and downstream finger valve 41
Finger 21 ... 21.
In the above embodiment, it is configured to, by compression helical spring 25 by pair finger 23,23 (inclined plane 23a, 23a)
Press against on inclined plane 21a of main finger 21,21a, when main finger 21 retreats mobile, by this compression helical spring 25
Elastic force, make inclined plane 21a of main finger 21,21a slide with secondary inclined plane 23a of finger 23,23,23a, it is also possible to take
And be instead of configured to, the link mechanism main finger 21 and secondary finger 23,23 linked sliding freely is set, at main finger
When shape part 21 retreats mobile, inclined plane 21a of main finger, 21a slide with secondary inclined plane 23a of finger 23,23,23a.
As the concrete composition of this link mechanism, such as, can list following composition: as shown in (A) of Figure 11, leading
T-slot 21f is formed in finger 21, and, secondary finger 23 arranges T-shaped slide block 23f, thus by main finger 21 and pair
Finger 23 links sliding freely.In this case, it is also possible to T-slot is set in secondary finger 23 side and in main finger 21
Side arranges T-shaped slide block.It addition, following composition can be listed: as shown in (B) of Figure 11, main finger 21 forms swallow
Stern notch 21g, and dove-tail form slide block 23g is set in secondary finger 23, so that main finger 21 and secondary finger 23 are slided
Link freely.In this case, it is also possible to dovetail groove is set in secondary finger 23 side and dovetail is set in main finger 21 side
Type slide block.
It addition, move (the slip on central shaft CL2 direction as secondary finger 23 can be made to slide relative to pump main body 11
Mobile) structure, however it is not limited to the structure of Fig. 4, it would however also be possible to employ other structures.Guiding on bar 242 for instance, it is possible to list
It is machined with the structure of spline, or utilizes link mechanism (the link mechanism that T-slot combines with T-shaped slide block, the dovetail shown in Figure 11
Groove and the Zhuan Jie mechanism of dove-tail form slide block combination) secondary finger 23 is bearing in the structure in pump main body 11 sliding freely.
Additionally, in this example, illustrate the example in the infusion pump 1 that the present invention is useful in semiclosed mode, but this
Bright be not limited to this, it is also possible to be applicable to by main finger 21 by the infusion pump of total head mode completely enclosed for tube for transfusion T.
[embodiment 2]
Other examples of the infusion pump of the present invention are described with reference to Figure 12～Figure 14.
In the infusion pump of this example, in addition to the composition of the pipe pressing portion 220 (pump machanism) of following description, all with above-mentioned
[embodiment 1] is essentially identical, therefore omits its specific description.
Pipe pressing portion 220 is by main finger 221, actuator 222, secondary finger 223, fixation fingers 230, slidably supported
Parts 240 and compression helical spring 225 etc. are constituted, it is characterised in that be provided with a pair relative to a main finger 221 and refer to
Shape part 223 this point.
Main finger 221 be cross section be the parts of rectangle, be provided with inclined plane 221a on a side.This inclined plane 221a
It it is the inclined plane that tilts of the advance and retreat moving direction (central shaft CL1 direction) relative to main finger 221.About inclined plane 221a
Angle of inclination will be in rear explanation.Another side of main finger 221 is parallel with advance and retreat moving direction (central shaft CL1 direction)
Face (straight plane 221c).This straight plane 221c can be with supporting and fixing fixation fingers in pump main body 11 (with reference to Fig. 2)
The front end face 230a of 230 slides.The front end face 230a of this fixation fingers 230 is as the limit of the lateral location limiting tube for transfusion T
Face processed and play a role.
Main finger 221 make its central shaft CL21 along direction before and after said pump main body 11 (with reference to Fig. 2) (be arranged on
The direction (direction orthogonal with the front surface wall 110 of pump main body 11) that the length direction of the tube for transfusion T in pump main body 11 is orthogonal) join
Put.Main finger 221 is bearing on the parts (not shown) as the guide member 5 shown in Fig. 5 sliding freely, it is thus possible to
Enough before and after said pump main body 11 direction enterprising retire dynamic.
Rearward end in main finger 221 is linked with actuator 222.Main finger-like is made by the driving of this actuator 222
Part 221 is retreated mobile (advance mobile or retreat mobile), when main finger 221 is positioned at maximum going-back position, as Figure 12 with
And shown in (A) of Figure 13, the front end face 221b of main finger 221 is arranged in and is arranged on the tube for transfusion T in said pump main body 11
The position (position corresponding with the outer peripheral face of tube for transfusion T) of the outer peripheral face contact of (positive round state).It addition, when main finger 221
When this state (being positioned at the state of maximum going-back position) is advanced mobile, in its advance moving process, tube for transfusion T is pushed.
Here, the infusion pump 1 of this example is semiclosed mode, therefore, the advance and retreat setting the main finger 221 realized by actuator 222 are moved
Dynamic stroke so that when main finger 221 is positioned at the state of most advanced, tube for transfusion T is the completeest as shown in (C) of Figure 13
Totally-enclosed.
As actuator 222, such as, can list and motor and rotation-parallel moving mechanism (such as rack pinion) are combined
Actuator and using solenoid as drive source actuator etc..Additionally, actuator 222 is same with above-mentioned [embodiment 1]
Controlled by control portion 7 sample.The composition in control portion 7 and control action etc. are essentially identical with [embodiment 1], therefore, omit
It illustrates.
Secondary finger 223 is arranged in the side of main finger 221.Secondary finger 223 be cross section be the parts of rectangle, at it
Leading section (end of main finger 221 side) is provided with inclined plane 223a that inclined plane 221a with above-mentioned main finger 221 is slided.
Angle of inclination about inclined plane 223a of this pair finger 223 will be in rear explanation.
Secondary finger 223 makes its central shaft CL22 along orthogonal for the central shaft CL21 direction with above-mentioned main finger 221
(direction parallel with the front surface of pump main body 11) configures.Extend it addition, be provided with in secondary finger 223 along central shaft CL22
Bullport 223c.The internal diameter of this bullport 223c is set as the biggest ormal weight compared with the external diameter of guiding bar 242 described later, secondary
Finger 223 can be slided relative to guiding bar 242.Being provided with in bullport 223c can be for feather key 243 described later slip
Keyway 223d.
Secondary finger 223 is bearing on slidably supported parts 240 sliding freely.The base portion of slidably supported parts 240
Part 241 and guiding bar 242 are wholely set.Guide the center central shaft CL22 along above-mentioned secondary finger 223 of bar 242.Base
Parts 241 supporting and fixing is in pump main body 11.
It is machined with keyway 242a guiding on bar 242, in this keyway 242a, is embedded with feather key 243.Bar 242 is guided to insert
In the bullport 223c of above-mentioned secondary finger 223, and, guide the feather key 243 of bar 242 to be inserted into the keyway of bullport 223c
In 223d.Thus, the secondary finger 223 of restriction is to guide the bar 242 movement (rotation) as axle, and secondary finger 223 is only capable of is drawing
The square upward sliding axial, i.e. orthogonal relative to the advance and retreat moving direction of main finger 221 of guide rod 242 moves (retreats and moves
Dynamic).
And, between the rear end face and base member 241 of above secondary finger 223, sandwiched compression helical spring
(elastomeric element) 225, pushes secondary finger 223 by the elastic force of this compression helical spring 225 towards main finger 221, should
Inclined plane 223a of secondary finger 223 abuts therewith with the state being pushed in inclined plane 221a of main finger 221.
So, compression helical spring 225 push secondary finger 223, thus, give up the throne after maximum in main finger 221
During putting movement of retreating between most advanced, inclined plane 221a of this main finger 221 and secondary finger 223
Inclined plane 223a is slided with the state of contact, and inclined plane 223a of secondary finger 223 will not be from the inclined plane of main finger 221
221a leaves, and the advance and retreat of secondary finger 223 and main finger 221 move and move linkedly.
Specifically, when main finger 221 is advanced mobile, inclined plane 221a of main finger 221 and secondary finger 223
Inclined plane 223a is slided, and secondary finger 223 retreats (with relative to fixation fingers 230 linkedly with the movement of main finger 221
Deviate from towards movement).On the other hand, when main finger 221 retreats mobile, by the elastic force of compression helical spring 225
Push secondary finger 223 towards main finger 221, make inclined plane 221a and the inclination of secondary finger 223 of this main finger 221
Face 223a slides, and makes the movement of secondary finger 223 and main finger 221 advance linkedly (with close to fixation fingers 230
Towards movement).
-angle of inclination of finger inclined plane-
Then, inclined plane 221a and the inclined plane of secondary finger 223 of above-mentioned main finger 221 are described with reference to Figure 26
The angle of inclination of 223a.
First, when the external diameter (diameter) of the tube for transfusion T of positive round state is set to d, and the conquassation amount of tube for transfusion T is set to Δ
During d, as it has been described above, overall width W2 of tube for transfusion T is [W2=(pi/2-1) Δ d+d].It addition, the inclined plane of main finger 221
Angle of inclination (relative to the angle of inclination of the central shaft CL21) θ 2 of 221a can be expressed as [tan θ 2=s2/ Δ d].
Here,
S2=[(pi/2-1) Δ d+d]-d=(pi/2-1) Δ d,
Tan θ 2 is
Tan θ 2=(pi/2-1) Δ d/ Δ d=pi/2-1.
And, θ 2 is
θ 2=tan-1(pi/2-1)=29.7 °.
According to this result of calculation, the angle of inclination of inclined plane 221a of main finger 221 is set to " 29.7 ° ", will be with this
The angle of inclination of inclined plane 223a of the secondary finger 223 that inclined plane 221a of main finger 221 is slided is (relative to main finger
The angle of inclination of the central shaft CL21 of 221) be also set to " 29.7 ° ", thus, secondary finger 223 with because of the advance and retreat of main finger 221
The change [(pi/2-1) Δ d+d] of the overall width of the tube for transfusion T moved and deform is mobile in ratio (to move to CL22 direction
Dynamic) such that it is able in the advance and retreat moving process of main finger 221, suppress in the front end face 223b of secondary finger 223 and transfusion
The situation in gap is produced between the outer peripheral face of pipe T.Here, the inclining of inclined plane 221a of main finger 221 and secondary finger 223
The angle of inclination of inclined-plane 223a can be " 29.7 ° " accurately, it addition, for example, it is also possible to be 30 ° ± β (β is tolerance).
-action specification of main finger and secondary finger-
Then, illustrate to constitute the main finger 221 of pipe pressing portion 220 and secondary finger with reference to Figure 13 and Figure 14
The action of 223.
[S21] first, as shown in (A) of Figure 13, when main finger 221 is positioned at maximum going-back position (initial position),
The outer peripheral face that the front end face 221b of this main finger 221 and front end face 223b of secondary finger 223 is arranged in tube for transfusion T connects
On the position (position corresponding with the outer peripheral face of tube for transfusion T) touched.It addition, the front end face 230a of fixation fingers 230 and transfusion
The outer peripheral face contact of pipe T, pipe push plate 6 contacts with the outer peripheral face of tube for transfusion T.
[S22] makes main finger when the actuator 222 (with reference to Figure 12) from the main finger of state-driven 221 of (A) of Figure 13
When shape part 221 advances, tube for transfusion T by main finger 221 front end face 221b push and make tube for transfusion T by conquassation (Figure 13's
(B)).Additionally, during the pushing of main finger 221, the side of tube for transfusion T (is the side of opposition side with secondary finger 223
Face) limited by the front end face 230a of fixation fingers 230.
It addition, during the advance of this main finger 221, by inclined plane 221a of main finger 221 and secondary finger-like
Slip between inclined plane 223a of part 223, secondary finger 223 is at direction (center Fig. 4 shown in orthogonal with pipe press direction
Axle CL2 direction) on by opposing compression helical spring 225 elastic force in the way of move (retrogressing).Now, secondary finger 223 is as above
Describedly with because main finger 221 the mobile and overall width of the tube for transfusion T that deforms of advancing (overall width shown in Figure 26:
(pi/2-1) Δ d+d)) change (increase) mobile in ratio (retrogressing), therefore, at the advance moving process of main finger 221
In, the front end face 223b of secondary finger 223 is arranged on the position corresponding with the outer peripheral face of tube for transfusion T (side) all the time.
[S23] is when main finger 221 is advanced further from the state of (B) of Figure 13 and arrives most advanced, defeated
Liquid pipe T is pushed further and is become the state shown in (C) of Figure 13.That is, even if main finger 221 is positioned at maximum advanced potential
Putting, tube for transfusion T does not the most become by the state (semi-closed state) of complete conquassation, accordingly, it is capable to the deflating of suppression tube for transfusion T.Separately
Outward, in such main finger 221 during most advanced moves, secondary finger 223 is similarly with tube for transfusion T's
The change (increase) mobile in ratio (retrogressing) of overall width, therefore, arrives the shape of most advanced in main finger 221
Under state, the front end face 223b of secondary finger 223 is arranged in the position corresponding with the outer peripheral face (side) by the tube for transfusion T of conquassation
On.
[S24] from the state (most advanced) of (C) of Figure 13 to contrary with when pushing towards driving main finger
The actuator 222 of 221, and make main finger 221 retreat.Along with the retrogressing of this main finger 221, be in by conquassation state is defeated
Liquid pipe T manages the recuperability (elastic force) of self by it and recovers ((A) of Figure 14) to shape originally.
Here, inclined plane 223a of secondary finger 223 is by elastic force the inclining to main finger 221 of compression helical spring 225
Inclined-plane 221a pushes, thus maintains the sliding mode of inclined plane 221a with this main finger 221, therefore, when main finger 221
When retreating mobile, secondary finger 223 is moved (advance) by the elastic force of compression helical spring 225.Now, secondary finger 223 with
Deform because the retrogressing of main finger 221 is moved the tube for transfusion T of (recovery) overall width (overall width shown in Figure 26: (π/
2-1) Δ d+d)) change (reducing) advance in ratio, therefore, in the retrogressing moving process of main finger 221, secondary finger-like
The front end face 223b of part 223 is arranged in the position corresponding with the outer peripheral face (side) of the tube for transfusion T in recuperation all the time.By
This, even if under the situation that the reset condition of tube for transfusion T is bad, the side of this tube for transfusion T is also pushed by secondary finger 223, because of
This, make tube for transfusion T restore.
[S25], when main finger 221 retreats further from the state of (A) of Figure 14 and arrives maximum going-back position, becomes
For the state shown in (B) of Figure 14.That is, tube for transfusion T restores completely to shape (substantially positive round shape) originally.It addition, at this
The main finger 221 of sample is during maximum going-back position moves, and secondary finger 223 is similarly wide with the entirety of tube for transfusion T
The change (reducing) of degree is advanced in ratio, therefore, when main finger 221 arrives maximum going-back position, and secondary finger-like
The front end face 223b of part 223 is arranged in the position corresponding with the outer peripheral face (side) of the tube for transfusion T restored.Thus, even if defeated
Under the situation that the reset condition of liquid pipe T is bad, the side of this tube for transfusion T is also pushed forcibly by secondary finger 223, accordingly, it is capable to
Tube for transfusion T is enough made to restore to substantially positive round state.
As it has been described above, according to the infusion pump of this example, in the advance and retreat moving process of main finger 221, secondary finger 223 with
Tube for transfusion T overall width change mobile in ratio, therefore, it is possible to suppression pair finger 223 front end face 223b with defeated
The situation in gap is produced between the outer peripheral face (side) of liquid pipe T.Thereby, it is possible to prevent tube for transfusion T in the front end of main finger 221
Warpage between face 221b and pipe push plate 6 such that it is able to improve the flow accuracy of conveying liquid.
And, make secondary finger by the slip (slip of inclined plane) between main finger 221 and secondary finger 223
223 move, and therefore, the drive system of finger is realized, energy by a system (drive system of the most main finger 221)
Enough seek the reduction of cost.It addition, with above-mentioned conventional driving method, i.e. main finger and secondary finger are the most independently driven
Method with driven the method for main finger and secondary finger to compare respectively by camshaft, also have in main finger 221
Movement and the movement of secondary finger 223 between be not easy the advantage that produces phase shift.
Additionally, in the above embodiment, it is also possible to guide member is set, to avoid main finger 221 and secondary finger
Dislocation (being arranged on the dislocation on the length direction of the tube for transfusion T in pump main body 11) between 223.
Here, in the above embodiment, upstream side finger valve 31 and downstream finger valve 41 (with reference to Fig. 3 and Fig. 5) it
Between be provided with a main finger 221, but the present invention is not limited to this, it is also possible at upstream side finger valve 31 and downstream finger valve
Multiple main finger 221 is set between 41 ... 221.
It addition, in the above embodiment, it is also possible to replace the composition of compression helical spring 225, and use (A) with Figure 11 with
And link structure (the link structure that main finger 221 and secondary finger 223 are linked sliding freely that (B) of Figure 11 is same
([T-slot+T-shaped slide block], [dovetail groove+dove-tail form slide block]).
It addition, move (the cunning on central shaft CL2 direction as secondary finger 223 can be made to slide relative to pump main body 11
Dynamic mobile) structure, however it is not limited to the structure of Figure 12, it would however also be possible to employ other structures.Bar is being guided for instance, it is possible to list
It is machined with the structure of spline on 242, or utilizes link mechanism (the link machine that T-slot combines with T-shaped slide block shown in Figure 11
Structure, the Zhuan Jie mechanism that dovetail groove combines with dove-tail form slide block) pair finger 23 is bearing in pump main body 11 sliding freely
Structure.
Additionally, in this example, illustrate the example in the infusion pump 1 that the present invention is useful in semiclosed mode, but this
Bright be not limited to this, it is also possible to be applicable to by main finger 221 by the infusion pump of total head mode completely enclosed for tube for transfusion T.
[embodiment 3]
Other examples of the infusion pump of the present invention are described with reference to Figure 15～Figure 23.Additionally, at Figure 17, Figure 19～Figure 21
In, with the state representation eccentric cam 322a not blocked.
The infusion pump 300 of this example has pump main body 11, front surface by this pump main body 11 as above-mentioned [embodiment 1]
The door 12 that side (pipe installation site) is closed.Door 12 swings via hinge 13,13 and freely (rotatable) is bearing in pump main body 11
On, it is possible to (such as opening with 180 ° from by position completely enclosed for the front-surface side of pump main body 11 to fully open position
Position) between swing.
In the infusion pump 300 of this example, in addition to the composition of following description, it is all basic with above-mentioned [embodiment 1]
Identical composition, therefore omits it and illustrates.
The infusion pump that infusion pump 300 is wriggling finger pressing type (total head mode) of this example, has pump machanism 302.
Pump machanism 302 is constituted by with lower part: in one direction (along the tube for transfusion T being arranged in said pump main body 11
Direction) multiple (being 7 in the example shown in Figure 17) main finger 321 of arranging ... 321；For respectively to this each main finger-like
Part 321 carries out the eccentric cam 322a driven that retreats independently of one another ... 322a；Make the camshaft that each eccentric cam 322a rotates
322；The secondary finger 323 arranged by each main finger 321 ... 323；Pipe push plate 330；Holding frame 340；And guide member
341 etc..
The main finger 321 of pump machanism 302 ... 321 and secondary finger 323 ... 323 across the front surface wall of pump main body 11
The peristome 110d of 110 and facing to the front-surface side of pump main body 11.It addition, be provided with pipe push plate 330 on door 12.Pipe pushes
Plate 330 is located on the position corresponding with pump machanism 302 (main finger 321 ... 321 etc.).Door 12 is being closed by pipe push plate 330
State under, relative to the main finger 321 of said pump mechanism 302 (the main finger 321 of maximum going-back position) front end with
The mode separating predetermined distance (and the external diameter of tube for transfusion T corresponding interval) is relative.
Main finger 321 ... 321 is plate-shaped member, it is possible to before and after said pump main body 11 direction (be arranged on pump master
The direction (direction orthogonal with the front surface wall 110 of pump main body 11) that the length direction of the tube for transfusion T on body 11 is orthogonal) upper each
Retreat mobile (advance mobile or retreat mobile) independently.
Main finger 321 ... 321 are maintained in holding frame 340.In the front-surface side of holding frame 340, with each main finger-like
The position of part 321 correspondence is provided with peristome 340a ... 340a, and the leading section of each main finger 321 is by this peristome 340a
Faced by the front-surface side (tube for transfusion T side) of holding frame 340.It addition, the rear side in holding frame 340 is provided with guide member 341,
Main finger 321 is limited ... the axle of 321 by the wall body between the peristome 340a of this guide member 341 and holding frame 340
Movement on (axis direction of camshaft 322).
Each main finger 321 is respectively formed with cam hole 321c.It has been respectively embedded into circle in this each cam hole 321c
The eccentric cam 322a of tabular.Each eccentric cam 322a can rotate in cam hole 321c, these eccentric cams 322a ...
322a is integrally rotatably arranged on above-mentioned camshaft 322.
The center of the plectane of each eccentric cam 322a is eccentric relative to camshaft 322, and as shown in figure 19, camshaft 322 revolves
Circle (rotating 360 degrees) time, give up the throne after most advanced (duct occlusion position) and maximum in the leading section of main finger 321
Put and make a round trip between (pipe fully open position).And, these multiple eccentric cam 322a ... 322a mutually has regulation
It is installed on camshaft 322 phase contrast (phase contrast of the direction of rotation of camshaft 322).Specifically, eccentric cam
322a ... 322a is so that along the multiple main finger 321 the most arranged side by side of camshaft 322 ... the leading section 321b of 321 ... 321b
Phase contrast (quantity of 360 °/eccentric cam 322a) along substantially sinusoidal wave arrangement is installed on camshaft 322.Additionally,
Figure 19 shows the position of the main finger 321 of the every half-twist of camshaft 322.
As shown in figure 17, the camshaft 322 of said pump mechanism 302 is along above-below direction (multiple main finger 321 ... 321
Orientation) and set.
The bottom of camshaft 322 is rotatably supported by the bearing 362 that is located in holding frame 340.Camshaft
The wall body of holding frame 340 is run through and highlights upward by the upper portion of 322.The through part of this camshaft 322 is provided with
Bearing 361, the upper portion of rotatably bearer cams axle 322 by this bearing 361.
In the upper end of camshaft 322, timing belt pulley (driven pulley) 371 is integrally rotatably installed.At this camshaft
The timing belt pulley 371 of 322 and the timing being integrally rotatably arranged in the rotary shaft 351 of motor (such as motor) 350
It is wound with Timing Belt 373 between belt wheel (driving pulley) 372, makes camshaft 322 rotate by the driving of this motor 350.
Motor 350 is driven control (rotating speed control) by control portion 307.Additionally, in this example, the battery in being built in infusion pump 1
Or source power supply supplies electric power to motor 350.
And, when making camshaft 322 rotate when the driving by motor 350, each eccentric cam 322a is in main finger-like
Rotate in the cam hole 321c of part 321.Along with the eccentric rotary of this eccentric cam 322a, each main finger 321 is (defeated from upstream side
The upstream side of the conveying direction of liquor charging body) it is sequentially advanced to downstream, retreats.Specifically, such as (A), (B) and Figure 21 of Figure 20
(A), (B) shown in, the front end 321b of main finger 321 from upstream side downstream side with wavy movement of wriggling.By this master
Finger 321 ... the advance and retreat of 321 move (moving back and forth), to being arranged in these main finger 321 ... the front end 321b of 321 ...
Tube for transfusion T between 321b and pipe push plate 330 pays vermicular movement, so that the conveying liquid in this tube for transfusion T is from upstream
Lateral downstream is sent.Additionally, in this example, in order to alleviate tube for transfusion T from main finger 321 ... 321 overloads being subject to,
Buffer substrate tablet 331 it is provided with between pipe push plate 300 and substrate 332.
-control portion-
Control portion 307 is constituted based on microcomputer etc..Although not shown, but connect in control portion 3077
There is air bubble sensor (such as, the ultrasound wave biography that the bubble being mixed into the tube for transfusion T being arranged in pump main body 11 is detected
Sensor), detection the opening and closing sensor of closed state etc. of door 12, range sensor described later etc., the output of these each sensors
Signal inputs to control portion 307.
Additionally, control portion 307 is according to set by the operation of the guidance panel 122 (Fig. 1 reference) by display operating portion 120
The setting value of the conveying fluid flow (conveying capacity of the conveying liquid in the unit interval) of (input), controls pump drive mechanism 302
The rotating speed of motor 350, thus come to adjust conveying fluid flow changeably.In this example, conveying fluid flow such as can be
In the range of 1mL/h～1200mL/h with [1mL/h] be unit set.
And, control portion 307 is configured to, in display floater 121 (with reference to Fig. 1) upper display " conveying of display operating portion 120
Fluid flow (injection rate) " and action message such as " inject cumulative time ", it addition, display comprise " bubble is mixed into exception " and
While various warnings such as " door are opened ", make warning boom unit action.
-characteristic-
Then, the characteristic of the infusion pump 300 of this example is described.
In the infusion pump 300 of this example, relative to each main finger 321 be configured with pair of right and left secondary finger 223,
223.Additionally, multiple main finger 321 ... 321 and the multipair secondary finger 323,323 that arranges by this each main finger 321
Composition be identical, therefore, the secondary finger 323,323 of the main finger 321 of following description one and a pair.
It is provided with pair of angled face 321a, 321a in the left and right side of main finger 321.This pair of angled face 321a, 321a
It is with the reciprocal inclination towards inclination relative to the advance and retreat moving direction of main finger 321 (central shaft CL31 direction)
Face, and it is as tending to the front end of main finger 321 and the inclined plane of gradually-reducing shape that two distance between the surface reduce.Inclined plane 321a,
The angle of inclination (relative to the angle of inclination of central shaft CL31) of 321a is the value (" 15.9 ° " identical with above-mentioned [embodiment 1]
Or " 16 ° ± β ").
Main finger 321 make its central shaft CL31 along direction before and after said pump main body 11 (be arranged on pump main body 11
On the orthogonal direction (direction orthogonal with the front surface wall 110 of pump main body 11) of the length direction of tube for transfusion T) configuration.
Main finger 321 retreat as described above by the rotation of eccentric cam 332a mobile (advance mobile or after
Retire dynamic), when main finger 321 is positioned at maximum going-back position, as shown in (A) etc. of Figure 18 and Figure 22, main finger 321
Front end 321b be arranged in the position that the outer peripheral face with the tube for transfusion T (positive round state) being installed in said pump main body 11 contacts
(position corresponding with the outer peripheral face of tube for transfusion T).It addition, when main finger 321 (is positioned at the shape of maximum going-back position from this state
State) when advancing mobile, this advance moving process pushes tube for transfusion T.Here, the infusion pump 1 of this example is total head mode, because of
This, when main finger 321 is in the state of most advanced, as shown in Figure 22 (C), tube for transfusion T completely encloses.
A pair secondary finger 323,323 is arranged in the side of main finger 321.A pair secondary finger 323,323 is identical
Shape, size, symmetrically configure.Each secondary finger 323,323 is plate-shaped member, in (main finger 321 side, its leading section
End) be provided with inclined plane 321a with above-mentioned main finger 321,321a slide inclined plane 323a, 323a.This pair finger
Inclined plane 323a of 323, the angle of inclination (relative to the angle of inclination of central shaft CL31 of main finger 321) of 323a are with upper
State [embodiment 1] identical value (" 15.9 ° " or " 16 ° ± β ").
Secondary finger 323,323 makes its central shaft CL32 along orthogonal for the central shaft CL31 side with above-mentioned main finger 321
Configure to (direction parallel with the front surface of pump main body 11).It addition, be provided with and central shaft CL32 in secondary finger 323,323
2 parallel bullport 323c, 323c and 323c, 323c.These 2 bullports 323c, 323c are arranged in across secondary finger
At the upper-lower position of the central shaft CL32 of 323.It addition, the internal diameter of each bullport 323c is set as, with guiding bar 342b described later
External diameter compare the biggest ormal weight, secondary finger 323 can be slided relative to guiding bar 324b.
Secondary finger 323,323 is bearing on slidably supported parts 324,324 sliding freely.Slidably supported parts 324,
324 make base member 324a, 324a and 2 guiding bar 324b, 324b and 324b, 324b be wholely set.Each guiding bar 324b
Center along the direction parallel with central shaft CL32.Base member 241,241 supporting and fixing is in pump main body 11.
2 guiding bar 324b, 324b of each slidably supported parts 324 are arranged in the central shaft across secondary finger 323
At the upper-lower position of CL32.Thus, the movement (rotation) around central shaft CL32 of the secondary finger 323,323, secondary finger are limited
323,323 be only capable of guide bar 324b, 324b axial, i.e. relative to main finger 321 retreat movement (center, direction
Axle CL31) orthogonal square upward sliding moves (retreat mobile).
And, between rear end face and base member 324a, 324a of above secondary finger 323,323, sandwiched compression
Helical spring (elastomeric element) 325,325, is pushed away towards main finger 321 by the elastic force of this compression helical spring 325,325
The secondary finger 323,323 of pressure, inclined plane 323a of this pair finger 323,323,323a are to press against main finger 321 respectively
State on inclined plane 321a, 321a abuts.
So, compression helical spring 325,325 push secondary finger 323,323, thus, in main finger 321
Retreat greatly during moving between going-back position and most advanced, with inclined plane 321a, the 321a of this main finger 321
State contact with secondary inclined plane 323a of finger 323,323,323a is slided, inclined plane 323a of pair finger 323,323,
323a will not leave from inclined plane 321a of main finger 321,321a, secondary finger 323,323 and the advance and retreat of main finger 321
Move and move linkedly.
Specifically, when main finger 321 is advanced mobile, inclined plane 321a of main finger 321,321a and secondary finger
323, inclined plane 323a, the 323a of 323 slides, and each secondary finger 323,323 retreats linkedly with the movement of main finger 321
(a pair secondary finger 323,323 to mutually deviate from towards movement).On the other hand, when main finger 321 retreats mobile, logical
The elastic force of overcompression helical spring 325 and make inclining of inclined plane 321a of main finger 321,321a and secondary finger 323,323
Inclined-plane 323a, 323a slides, and each secondary finger 323,323 and the movement of main finger 321 are advanced (a pair secondary finger linkedly
323,323 to close towards movement).
-action specification of main finger and secondary finger-
Then, with reference to Figure 22 and Figure 23, main finger 321 and the action of a pair secondary finger 323,323 are described.
[S31] first, as shown in (A) of Figure 22, when main finger 321 is positioned at maximum going-back position (initial position),
Front end face 323b, 323b of the front end 321b of this main finger 321 and a pair secondary finger 323,323 are arranged in tube for transfusion T
Outer peripheral face (position corresponding with outer peripheral face).It addition, pipe push plate 330 contacts with the outer peripheral face of tube for transfusion T.
[S32], when main finger 321 is advanced from the state of (A) of Figure 22, tube for transfusion T is by the front end of main finger 321
321b pushes, and tube for transfusion T is by conquassation ((B) of Figure 22).It addition, during the advance of main finger 321, by this main finger-like
Inclined plane 321a of part 321,321a and each secondary slip between inclined plane 323a of finger 323,323,323a, and make a pair
Secondary finger 323,323 againsts compression on the direction (the central shaft CL32 direction shown in Figure 18) orthogonal with pipe press direction
The elastic force of helical spring 325,325 moves (retrogressing).Now, a pair secondary finger 323,323 as described above with because of main finger-like
The change of the overall width (overall width shown in Figure 26: (pi/2-1) Δ d+d) of the tube for transfusion T moved and deform that advances of part 321
Change (increase) mobile in ratio, therefore, in the advance moving process of main finger 321, the front end of secondary finger 323,323
Face 323b, 323b are arranged on the position corresponding with the outer peripheral face of tube for transfusion T (side) all the time.
[S33] is when main finger 321 is advanced further from the state of (B) of Figure 22 and arrives most advanced, defeated
Liquid pipe T is pushed further and is become the state shown in (C) of Figure 22.That is, main finger 321 tube for transfusion T is closed.It addition,
In such main finger 321 during most advanced moves, a pair secondary finger 323,323 be same and tube for transfusion
The change (increase) mobile in ratio (retrogressing) of the overall width of T, therefore, at the maximum advanced potential arriving main finger 321
Under the state put, front end face 323b, 323b of each secondary finger 323,323 are arranged in and by the outer peripheral face of the tube for transfusion T of conquassation
The position that (side) is corresponding.
[S34] when main finger 321 from the state (most advanced) of (C) of Figure 22 with contrary with when pushing towards
Time mobile (retrogressing), along with the retrogressing of this main finger 321, by the tube for transfusion T of the conquassation state recuperability by its pipe self
(elastic force) and recover ((A) of Figure 23) to shape originally.
Here, secondary inclined plane 323a of finger 323,323,323a are by the elastic force of compression helical spring 325,325
It is pushed in inclined plane 221a of main finger 321, on 221a, maintains and inclined plane 21a of this main finger 321, the cunning of 21a
Dynamic state, therefore, when main finger 321 retreats mobile, a pair secondary finger 323,323 by compression helical spring 325,
The elastic force of 325 and move (advance).Now, a pair secondary finger 323,323 deforms with because the retrogressing of main finger 321 is moved
The overall width (overall width shown in Figure 26: (pi/2-1) Δ d+d) of the tube for transfusion T of (recovery)) change (reducing) in ratio
Ground advances, and therefore, in the retrogressing moving process of main finger 321, front end face 323b, 323b of secondary finger 323,323 begin
It is arranged in eventually on the position corresponding with the outer peripheral face (side) of the tube for transfusion T in recuperation.Thus, even if tube for transfusion T's
Under the situation that reset condition is bad, the side of this tube for transfusion T is also pushed by secondary finger 323,323, and therefore, tube for transfusion T can answer
Former.
[S35], when main finger 321 retreats further from the state of Figure 23 (A) and arrives maximum going-back position, becomes
State shown in Figure 23 (B).That is, tube for transfusion T restores completely to shape (substantially positive round shape) originally.It addition, such
Main finger 321 is during maximum going-back position moves, and a pair secondary finger 323,323 is also wide with the entirety of tube for transfusion T
The change (reducing) of degree is mobile in ratio, therefore, when main finger 321 arrives maximum going-back position, and secondary finger-like
Front end face 323b, 323b of part 323,323 is arranged in the position corresponding with the outer peripheral face (side) of the tube for transfusion T restored.Thus,
Even if under the situation that the reset condition of tube for transfusion T is bad, the side of this tube for transfusion T also can be forced by secondary finger 323,323
Ground pushes, therefore, it is possible to make tube for transfusion T be restored to substantially positive round state.
As it has been described above, according to the infusion pump 300 of this example, in the advance and retreat moving process of main finger 321, a pair secondary finger-like
Part 323,323 is mobile in ratio with the change of the overall width of tube for transfusion T, therefore, it is possible to suppression is in each secondary finger 323,323
Front end face 323b, 323b and the outer peripheral face of tube for transfusion T between produce the situation in gap.Thus, even if being the defeated of total head mode
Liquid pump 300, it is also possible to prevent tube for transfusion T warpage between the front end 321b and pipe push plate 330 of main finger 321, it is thus possible to
Enough flow accuracies improving conveying liquid.
Be additionally, since by the slip between main finger 321 and secondary finger 323,323 make secondary finger 323,
323 move, so the drive system of finger is realized by a system (drive system of the most main finger 321), it is possible to
Seek the reduction of cost.It addition, with above-mentioned conventional driving method, i.e. main finger and secondary finger are the most independently driven
Method with driven the method for main finger and secondary finger to compare respectively by camshaft, also have and be not easy in main finger-like
The advantage producing phase shift between movement and the movement of secondary finger 323,323 of part 321.
Additionally, in the above embodiment, it is also possible to guide member is set, in order to avoid producing main finger 321 and secondary finger 323
Between the dislocation (dislocation (mistake on the above-below direction of Figure 16 being arranged on the length direction of the tube for transfusion T in pump main body 11
Position)).
In the above embodiment, multiple main finger 321 is configured at spaced intervals but it also may so that multiple main finger
321 states contacted with each other (slidably state) configure.
It addition, in the above embodiment, the number of main finger 321 is set to 7, but the present invention is not limited to this, it is possible to
Think any number of.
It addition, in the above embodiment, it is provided with 2 secondary finger 323,323 relative to a main finger 321, but this
Bright it is not limited to this, it is also possible to a secondary finger 323 is set relative to a main finger 321.
Industrial applicibility
The present invention can be used in medical medicinal liquid is injected into internal in the case of wait in the infusion pump that used.
Description of reference numerals
1,300 infusion pump
11 pump main bodys
12
2,302 pump machanism
20,220 pipe pressing portion
21,221,321 main finger
21a, 221a, 321a inclined plane (sliding surface)
22,222 actuator
23,223,323 secondary finger
23a, 223a, 323a inclined plane (sliding surface)
25,225,325 compression helical spring (elastomeric element)
30 side valve portion, upstreams
31 upstream side finger valves
40 downstream side valve portions
41 downstream finger valves
6,330 pipe push plate
7,307 control portion
350 motor
T tube for transfusion
Claims (5)
1. an infusion pump, has the pump machanism pushing tube for transfusion to carry the conveying liquid in this tube for transfusion, it is characterised in that
Described pump machanism has: main finger, can arrange in the way of retreating relative to tube for transfusion, and pushes away when advancing mobile
Pressure infuser pipe；Drive mechanism, makes described main finger move along advance and retreat direction；With secondary finger, it is only capable of relative to described
The orthogonal direction of the advance and retreat moving direction of main finger is enterprising retire dynamic,
Described main finger is provided with the inclined plane relative to the described oblique inclination of advance and retreat moving direction, and, in described pair
Finger is provided with can slide with the inclined plane of described main finger and make by sliding with the inclined plane of this main finger
The inclined plane that this pair finger moves along a described orthogonal direction, and be configured to: retreat in described main finger mobile
Time, the inclined plane of this main finger and the inclined plane slip of described secondary finger, described secondary finger and described main finger
Move and move along a described orthogonal direction linkedly,
When described main finger is advanced mobile, the change of described secondary finger and the overall width of tube for transfusion be ratio retreat
Mobile, when described main finger retreats mobile, before the change of the overall width of described secondary finger and tube for transfusion is ratio ground
Enter movement,
Described main finger is provided with relative to described advance and retreat moving direction with the one of the gradually-reducing shape towards inclination opposite each other
To inclined plane, and, including a pair secondary finger, this pair secondary finger has can be slided with each inclined plane of this main finger
Dynamic inclined plane,
If the described inclined plane of described main finger is θ 1 relative to the angle of inclination of the central shaft of described main finger, set
For:
θ 1=tan-1(π/4-1/2)。
Infusion pump the most according to claim 1, it is characterised in that
Have the elastomeric element tilting the inclined plane pushing towards described main finger of described secondary finger, and be configured to,
When described main finger retreats, the inclined plane of described main finger is made to refer to described pair by the elastic force of described elastomeric element
The inclined plane of shape part is slided.
Infusion pump the most according to claim 1, it is characterised in that
There is the link mechanism described main finger and described secondary finger linked sliding freely, and be configured to, described
When main finger retreats mobile, make the inclined plane of main finger and the inclination of secondary finger by the described link linking mechanism
Slide in face.
Infusion pump the most according to any one of claim 1 to 3, it is characterised in that
Described pump machanism has: described main finger and secondary finger；Conveying side by the conveying liquid of described main finger
The upstream side finger valve that the tube for transfusion opening and closing of upstream side upwards is closed freely；With by the conveying liquid of described main finger
The downstream finger valve that the tube for transfusion opening and closing in the downstream on conveying direction is closed freely.
Infusion pump the most according to any one of claim 1 to 3, it is characterised in that
Described pump machanism has: multiple main finger, by can retreat relative to tube for transfusion mobile in the way of arrange, and advance
Tube for transfusion is pushed time mobile；And drive mechanism, make multiple described main finger move independently of one another along advance and retreat direction, and described
Pump machanism be by relative to tube for transfusion retreat drive each described finger and with vermicular movement by the way of send conveying liquid
Mechanism, is respectively equipped with described secondary finger relative to each main finger of this pump machanism.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011209735 | 2011-09-26 | ||
| JP2011-209735 | 2011-09-26 | ||
| PCT/JP2012/073145 WO2013047185A1 (en) | 2011-09-26 | 2012-09-11 | Infusion solution pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103974730A CN103974730A (en) | 2014-08-06 |
| CN103974730B true CN103974730B (en) | 2016-11-30 |
Family
ID=
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|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20180911 |