JP2585986Y2 - Infusion pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion pump which is used, for example, for intermittently sending an infusion in a tube connected to an infusion bag.

[0002]

2. Description of the Related Art Conventionally, in this type of infusion pump,
For example, there is one having a configuration as disclosed in Japanese Utility Model Laid-Open No. 63-160846.

In such an infusion pump, as shown in FIG. 8, a plurality of fingers b incorporated in a housing a can be moved in a horizontal direction by a cam mechanism (not shown), and are positioned corresponding to the fingers b. As described above, the tube T set in the rectangular finger frame c is sequentially pressed in the longitudinal direction to move the closing point, whereby the infusion in the tube T is sent.

[0004]

However, in the above-described infusion pump having the conventional structure, the tube T itself before setting is usually in a wound state at the time of marketing, and even if the tube T is stretched during setting, the bending habit remains. For this reason, the tube T set in the finger frame c is often in a meandering state, as shown by a two-dot broken line in FIG.

[0005] Even if the tube T is set straight on the finger frame c, the tube T moves laterally and shifts with the pushing operation of each finger b against the tube T during the operation of the pump. Deforms into a meandering state for ease. Also, since the finger frame needs a certain width for the finger to press the tube,
There are also situations in which it is difficult to form the tube narrow so as to accommodate the meandering of the tube.

As described above, when the tube is deformed in a meandering state, the position of the tube with respect to each finger deviates from an appropriate position during the operation of the pump, and the pressing action of each finger on the tube becomes non-uniform. Since the part is not completely sealed, there arises a problem that flow accuracy is poor.

An object of the present invention is to provide an infusion pump capable of preventing the meandering of the tube and improving the flow rate accuracy.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a housing and a housing which is incorporated in the housing and which is sequentially pressed along a longitudinal direction of a tube to move a closing point. And a plurality of fingers for feeding the infusion in the tube, and a plurality of fingers attached to the housing and provided around the closing point in the longitudinal direction of the tube.
A rectangular finger frame for holding a location on two opposing sides,
Other two sides which do not participate in the retention of the finger frame tube
Protrusions are provided on the inner part to suppress the meandering state of the tube
At the same time as the outer sides of the other two sides of the finger frame.
A mating convex portion was provided, and the engaging convex portion was formed on the housing.
It is characterized by being detachably fitted to the engaging recess .

In this case, the projections are provided integrally with and opposed to both sides of the finger frame which are not involved in holding the tube, with the tubes interposed therebetween, and the fingers of the fingers corresponding to the projections provided on the finger frame are provided. It is preferable that the portion is formed as a gap by a spacer.

[0010]

In other words, according to the present invention, since the finger frame on which the tube is set is provided with a projection for suppressing the meandering state of the tube, the meandering of the tube at the time of setting and during the operation of the pump is reliably prevented. The liquid accuracy can be improved , and the attachment / detachment structure of the engaging convex portion and the engaging concave portion
And the finger frame can be easily assembled to the housing.
You.

[0011] Further, since the protrusions are provided opposite to two sides of the finger frame that are not involved in holding the tube with the tube interposed therebetween, the configuration is simplified. Further, it is desirable that the projection is formed integrally with the finger frame.

Further, since the finger portion corresponding to the protrusion provided on the finger frame is formed as a gap by a spacer, the protrusion does not interfere with the finger during the operation of the pump, and affects the pressing of the tube. Absent.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to each embodiment shown in FIGS.

FIGS. 1 to 5 show a first embodiment of an infusion pump according to the present invention. As shown in FIGS. 1 to 3, reference numeral 1 denotes a rectangular box-shaped housing.

The front panel 2 of the housing 1 includes
An opening 3 having a vertically long rectangular shape facing a plurality of fingers 6 to be described later is formed, and fitted into the upper and lower portions of the opening 3 so as to guide the upper and lower portions of a tube T connected to an infusion bag (not shown). Grooves 4 and 5 are provided.

In the housing 1, a plurality of fingers 6 are vertically stacked via a spacer 7 provided so as to form a gap S at the center. It is engaged so as to respectively correspond to a plurality of cams 10 provided on the rotating drive shaft 9.

Further, in the figure, reference numeral 11 denotes a rectangle made of a synthetic resin material such as ABS resin provided so as to be placed around the closing point of the tube T around the opening 3 formed in the front panel 2 of the housing 1. In the finger frame having a shape, holding grooves 12 and 13 communicating with the grooves 4 and 5 are provided on two opposing sides 11 a of the upper and lower portions of the finger frame 11. The width of the holding grooves 12 and 13 is a tube T. Is set to the same size as the diameter of the tube T, so that two positions in the longitudinal direction of the tube T fitted into the grooves 4 and 5 are held in a positioned state.

Further, the tube T of the finger frame 11
As shown in FIG. 4, engagement protrusions 14 and 15 are provided at the upper and lower portions on both left and right outer sides of the other two sides 11b which are not involved in the holding of the two sides 11b. The housing 1
Are fitted into engaging recesses 1a and 1b formed in the front panel portion 2 and are detachable.
A pair of projections 16, 16 is provided in the middle of the left and right inner portions by integral molding. The interval W between the projection ends of the projections 16, 16 is such that a tube T having a diameter of, for example, 4.5 mm is crushed. It is shown by a dashed line in the figure when it is presented 6.
Restrict left and right horizontal movement corresponding to 5mm width
It is set to 6.5mm. In other words, the left and right projections 16,
It is desirable that the interval W between the 16 protruding ends is equal to or slightly larger than the maximum pressing deformation width of the tube T.

That is, the respective fingers 6 project in the horizontal direction in conjunction with the rotation of the respective cams 10 provided on the same axis of the drive shaft 9 rotated by the motor 8 so that the rotation angle positions are sequentially shifted. By moving the closed position by sequentially pressing down from top to bottom along the up-and-down longitudinal direction of the tube T positioned and held by the finger frame 11 so as to correspond to the fingers 6, The infusion in the tube T is sent.

On the other hand, a pair of projections 16, 16 provided integrally on both left and right inner portions of the finger frame 11 are provided with the holding grooves 1.
2 and 13 are opposed to each other with an intermediate portion of the tube T positioned and held therebetween, and at the time of setting shown in FIG.
A meandering state due to deformation of the tube T during operation of the pump as shown in FIG. 5 is suppressed.

Further, the spacer 7 provided at the center of the finger 6 forms a space S at a portion corresponding to the pair of projections 16 provided on both right and left inner portions of the finger frame 11, thereby forming a pump. The projections 16 are configured so as not to interfere with the fingers 6 therein.

A cover 17 is provided on the front panel 2 of the housing 1 so as to be opened and closed in a single-open state.
A receiving member 18 is provided on the back surface of the cover 17.
The receiving member 18 connects the tube T to the finger frame 11.
In addition, they are positioned and clamped. In this manner, a plurality of pairs of the projections 16 can be provided in a range that does not significantly affect the number of the fingers 6 other than a configuration in which the pair of projections are simply opposed to each other in the lateral direction.

FIG. 6 shows a second embodiment according to the present invention.
6 and 16 are provided. In other respects, the second embodiment is the same as the first embodiment.

FIG. 7 shows a third embodiment of the present invention, in which protrusions 16 and 16 are provided on one side of a finger frame 11.
And a single projection 16 is provided on the other side of the frame 11 between the projections 16 on one side.
Are projected correspondingly. As described above, a configuration other than the pair forming left and right as in the above-described embodiment is also possible. In other respects, the same reference numerals as those in the first and second embodiments are assigned, and description thereof is omitted.

[0025]

As is apparent from the above description, the present invention provides a finger frame on which a tube is set, which is provided with a projection for suppressing the meandering state of the tube. Meandering can be reliably prevented, whereby the accuracy of liquid feeding can be improved, and the accuracy of flow rate can be improved. Also,
Engagement protrusion provided on the swinger frame and engagement formed on the housing
The finger frame is attached to the housing
It can be easily assembled.

Further, as described in the second and third aspects, since the finger frame is formed integrally with the pair of projections provided on two sides not involved in holding the tube so as to face each other with the tube interposed therebetween. , And can be manufactured at a low cost with a simple configuration.

Further, in the present invention, since a portion of the finger corresponding to the protrusion provided on the finger frame is formed as a gap by a spacer, the protrusion does not interfere with the finger during the operation of the pump, so that the shape of the tube can be reduced. Does not affect pressing.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view schematically showing a first embodiment of an infusion pump according to the present invention.

FIG. 2 is a front view of the housing in a state where a cover is removed as viewed from the direction of arrows II-II in FIG. 1;

FIG. 3 is an enlarged cross-sectional view of a main part of the tube in a set state along line III-III in FIG. 2;

FIG. 4 is an explanatory diagram of a finger frame.

FIG. 5 is an explanatory diagram showing a deformed state of a tube during operation of the pump.

FIG. 6 is a front view of the housing with the cover removed showing a second embodiment of the infusion pump according to the present invention.

FIG. 7 is a front view of the housing with the cover removed showing a third embodiment of the infusion pump according to the present invention.

FIG. 8 is a front view of a housing with a cover removed, schematically showing a conventional infusion pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing, 6 ... Finger, 11 ... Finger frame, 16, 16 ... Projection, T ... Tube.

Claims (4)

(57) [Scope of request for utility model registration] 1. A housing, a plurality of fingers incorporated in the housing, and a plurality of fingers for sending an infusion solution in the tube by sequentially pressing along a longitudinal direction of the tube to move a closing point, and the housing. And a rectangular finger frame provided around the closing point and holding two longitudinal positions of the tube at two opposing sides , and inside the other two sides not involved in holding the tube of the finger frame. Rutotomo provided with a projection to prevent the meandering of the tube section
In addition, engaging projections are formed on the outer sides of the other two sides of the finger frame.
An engagement recess formed in the housing, wherein the engagement projection is formed in the housing.
An infusion pump characterized by being detachably fitted to a pump. 2. The infusion pump according to claim 1, wherein the protrusion is provided opposite to two sides of the finger frame which are not involved in holding the tube, with a tube interposed therebetween. 3. The infusion pump according to claim 1, wherein said projection is formed integrally with a finger frame. 4. The infusion pump according to claim 1, wherein a portion of the finger corresponding to the projection provided on the finger frame is formed as a gap by a spacer.