Filtering module and infusion pump device

Abstract

The utility model relates to the technical field of medical instruments, and discloses a filtering module and an infusion pump device. The filtering module comprises a shell, a first filtering layer, a second filtering layer and a silica gel plug, a liquid inlet and a liquid outlet are formed in the two opposite sides of the shell respectively, the shell is sequentially filled with the first filtering layer and the second filtering layer in the direction from the liquid inlet to the liquid outlet, and the silica gel plug covers the liquid outlet; and the silica gel plug is in sealing fit with the liquid outlet. The diameter of particle impurities filtered by the first filter layer is larger than that of particle impurities filtered by the second filter layer. The filtering module disclosed by the utility model can be used for filtering a liquid medicament in an infusion pump device, so that the injection effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of filtering module and infusion pump device. BACKGROUND

[0002] As medical instrument that can be self-injected by user, infusion pump device is more and more valued due to its convenient and efficient characteristics. Since infusion pump device needs to store liquid medicine in advance, impurities will inevitably mix in medicine during the process of storing medicine. When user uses infusion pump device, larger impurities can easily block medicine conduit during the flow of medicine in medicine conduit, which can cause medicine unable to enter into user's body, and further cause poor injection effect. SUMMARY

[0003] The utility model provides a kind of filtering module and infusion pump device, which can be used to filter liquid medicine in infusion pump device, thereby ensuring injection effect.

[0004] In a first aspect, the utility model provides a kind of filtering module, for the filtration of liquid medicine in infusion pump device, the filtering module includes shell, first filter layer, second filter layer and silica gel plug;

[0005] The opposite sides of the shell are respectively provided with liquid inlet and liquid outlet, the first filter layer and the second filter layer are sequentially filled in the interior of the shell along the direction of the liquid inlet to the liquid outlet, the silica gel plug is covered in the liquid outlet, and the silica gel plug is sealed with the liquid outlet;

[0006] The diameter of the particle impurities filtered by the first filter layer is greater than the diameter of the particle impurities filtered by the second filter layer.

[0007] The filtering module provided by the utility model can be applied to infusion pump device, and specifically, the filtering module can be arranged between medicine storage module and medicine conduit. When user uses infusion pump device, liquid medicine in medicine storage module can enter into the shell through the liquid inlet of the shell, and then flow into medicine conduit after passing through the first filter layer and the second filter layer. When liquid medicine flows in the shell, the larger impurity particles in liquid medicine are screened out by the first filter layer, and then the smaller impurity particles in liquid medicine are screened out by the second filter layer. After twice filtering, the liquid medicine can avoid larger impurity particles to block medicine conduit when flowing in medicine conduit, so as to ensure that liquid medicine can enter into user's body as much as possible, thereby ensuring injection effect.

[0008] In some possible embodiments, the material of the first filter layer is sponge or polyethylene.

[0009] In some possible embodiments, the second filter layer comprises a filter membrane, or the material of the second filter layer is polyethylene.

[0010] In some possible embodiments, when the second filter layer comprises a filter membrane, the second filter layer further comprises a positioning ring located on the side of the filter membrane facing away from the first filter layer.

[0011] The opposite sides of the positioning ring are in abutment with the filter membrane and the silica gel plug respectively, so that the filter membrane is attached to the first filter layer.

[0012] In some possible embodiments, when the material of the second filter layer is polyethylene, the silica gel plug is provided with an annular abutment portion on the side facing the second filter layer, and the annular abutment portion is in abutment with the second filter layer on the side facing the second filter layer.

[0013] In some possible embodiments, along the arrangement direction of the liquid inlet and the liquid outlet, the size of the first filter layer is twice the size of the second filter layer.

[0014] In some possible embodiments, the first filter layer is used to filter particle impurities with a diameter of 100 μm-1 mm.

[0015] In some possible embodiments, the second filter layer is used to filter particle impurities with a diameter of 0.2 μm-100 μm.

[0016] In the second aspect, the utility model provides a kind of infusion pump device, including the medicament storage module for storing liquid medicament, the medicament conduit for the liquid medicament in the medicament storage module is introduced into user body, and the filter module as described in any possible embodiment in the first aspect;

[0017] The filter module is arranged between the medicament storage module and the medicament conduit, and one end of the medicament conduit is arranged in the silica gel plug and communicates with the inside of the shell.

[0018] In some possible embodiments, the cross-sectional shape of one end of the medicament conduit arranged in the silica gel plug is a keyhole shape. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a partial cross-sectional structure schematic view of infusion pump device in the utility model embodiment;

[0020] Figure 2 It is another partial cross-sectional structure schematic view of infusion pump device in the utility model embodiment;

[0021] Figure 3A sectional structure schematic view of the medicine conduit in the embodiment of the present application.

[0022] In the drawings:

[0023] 100-filter module; 110-housing; 120-first filter layer; 130-second filter layer; 131-filter membrane; 132-positioning ring; 140-silica gel plug; 150-annular abutting portion; 200-medicine storage module; 300-medicine conduit. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] With reference to Figure 1 The filter module 100 in the embodiment of the present application can be applied to an infusion pump device to filter liquid medicine, so as to avoid the medicine conduit 300 from being blocked when the liquid medicine flows in the medicine conduit 300. Specifically, the filter module 100 can be arranged between the medicine storage module 200 and the medicine conduit 300. The medicine storage module 200 is used for storing liquid medicine, and the medicine conduit 300 is used for guiding the liquid medicine into the user. That is to say, the filter module 100 in the present embodiment can filter the liquid medicine before the liquid medicine enters the medicine conduit 300, so as to reduce the particulate impurities in the liquid medicine entering the medicine conduit 300. In this way, not only the medicine conduit 300 can be avoided from being blocked, but also the purity of the liquid medicine can be improved, thereby ensuring the injection effect.

[0026] As Figure 1As shown, the filter module 100 can include a housing 110, a first filter layer 120, a second filter layer 130, and a silica gel plug 140, wherein the housing 110 is provided with a liquid inlet and a liquid outlet at opposite ends, the first filter layer 120 and the second filter layer 130 are sequentially filled in the housing 110 in the direction from the liquid inlet to the liquid outlet, the silica gel plug 140 covers the liquid outlet, and the silica gel plug 140 is sealingly fitted with the liquid outlet. Here, it is worth noting that, taking the housing 110 as a cylindrical shape as an example, the first filter layer 120 filled in the housing 110 can be understood as that the first filter layer 120 at least abuts between the circumferential direction of the housing 110 and the inner wall of the housing 110, so as to ensure that there is no gap between the first filter layer 120 and the inner wall of the housing 110, and the liquid medicine must pass through the first filter layer 120 to be filtered during the process of flowing from the liquid inlet to the liquid outlet. Similarly, the second filter layer 130 filled in the housing 110 can also be understood as that the second filter layer 130 abuts between the circumferential direction of the housing 110 and the inner wall of the housing 110, so as to ensure that the liquid medicine must pass through the second filter layer 130 to be filtered when flowing from the first filter layer 120 to the liquid outlet.

[0027] In addition, the first filter layer 120 can also be arranged close to the inner wall of the side of the housing 110 where the liquid inlet is arranged, on the one hand, the volume of the first filter layer 120 can be increased as much as possible, and on the other hand, the first filter layer 120 can also be kept relatively fixed in the housing 110. The side surface of the silica gel plug 140 facing the second filter layer 130 can also abut with the second filter layer 130, so as to keep the second filter layer 130 relatively fixed in the housing 110.

[0028] In the embodiment, the first filter layer 120 and the second filter layer 130 are respectively used to filter impurity particles of different diameters, and specifically, the diameter of the particle impurities filtered by the first filter layer 120 is larger than the diameter of the particle impurities filtered by the second filter layer 130. It can be understood that the first filter layer 120 is used to perform primary filtration on the liquid medicine, and the second filter layer 130 is used to perform secondary filtration on the liquid medicine, so as to improve the filtration effect of the liquid medicine.

[0029] In some embodiments, the first filter layer 120 can be used to filter particle impurities with a diameter of 100 μm-1 mm, and based on this, the material of the first filter layer 120 can be, for example, sponge or polyethylene (PE). When the material of the first filter layer 120 is polyethylene, a PE sintering process can be used to form a plurality of filter holes to filter the particle impurities through the filter holes.

[0030] The second filter layer 130 can be used to filter particle impurities with a diameter of 0.2-100 μm, and based on this, the second filter layer 130 may, for example, include a filter membrane 131, or the material of the second filter layer 130 can be polyethylene. Similarly, when the material of the second filter layer 130 is polyethylene, a PE sintering process can also be used to form a plurality of filter holes to filter the particle impurities again through the filter holes.

[0031] In actual applications, the combination of the first filter layer 120 and the second filter layer 130 can be polyethylene and polyethylene, polyethylene and the filter membrane 131, sponge and polyethylene, or sponge and the filter membrane 131. It should be noted that when the first filter layer 120 and the second filter layer 130 are both made of polyethylene, the filter holes formed by the first filter layer 120 have a larger pore size than the filter holes formed by the second filter layer 130.

[0032] Reference Figure 1 When the second filter layer 130 includes the filter membrane 131, the second filter layer 130 further includes a positioning ring 132 located on the side of the filter membrane 131 facing away from the first filter layer 120. The positioning ring 132 can abut the inner wall of the shell 110 along the circumference of the shell 110, and the opposite ends of the positioning ring 132 can abut the filter membrane 131 and the silica gel plug 140, respectively. At this time, the filter membrane 131 can be kept in a state of adhesion with the first filter layer 120 under the pressing effect of the positioning ring 132. The secondary filtering mode adopted in this embodiment can prevent large particle impurities from blocking the filter membrane 131, thereby avoiding a decrease in the water permeability of the filter membrane 131 and preventing a decrease in the injection effect caused by a decrease in the amount of the medicament passing through the filter membrane 131. In addition, the secondary filtering mode can also reduce the use area of the filter membrane 131 and improve the filtering effect.

[0033] As an optional embodiment, the positioning ring 132 and the filter membrane 131 can be in an integrated structure, which can simplify the assembly process and improve the assembly effect when the filter module 100 is assembled.

[0034] In addition, the middle part of the positioning ring 132 is a hollow structure, and when the medicament conduit 300 is arranged in the silica gel plug 140, the end of the medicament conduit 300 can extend into the hollow structure of the positioning ring 132, so as to increase the length of the medicament conduit 300 extending into the shell 110. When the liquid medicament passes through the filter membrane 131, the hollow structure of the positioning ring 132 can temporarily store the liquid medicament, and the liquid medicament can flow into the medicament conduit 300 as much as possible, so as to avoid waste of the liquid medicament. In addition, due to the sealing effect of the silica gel plug 140, the silica gel plug 140 can block the liquid medicament, so that the medicament can only flow out of the shell 110 through the medicament conduit 300.

[0035] refer to Figure 2 When the second filter layer 130 is made of polyethylene, the silicone stopper 140 has an annular abutment portion 150 on the side facing the second filter layer 130. The annular abutment portion 150 abuts against the second filter layer 130 to ensure that the silicone stopper 140 and the second filter layer 130 are relatively fixed. In this embodiment, the annular abutment portion 150 has a hollow structure in the middle, allowing the medicine to extend into the hollow structure of the annular abutment portion 150 after passing through the silicone stopper 140, thereby increasing the length of the medicine conduit 300 extending into the housing 110. When the liquid medicine passes through the second filter layer 130, the hollow structure of the annular abutment portion 150 can temporarily store the liquid medicine and allow the liquid medicine to flow into the medicine conduit 300 as much as possible, thereby avoiding waste of liquid medicine.

[0036] As an alternative implementation, the annular abutment portion 150 and the silicone plug 140 can be an integral structure, which simplifies the assembly process and improves the assembly effect when assembling the filter module 100.

[0037] In some embodiments, such as Figure 1 or Figure 2 As shown, along the arrangement direction of the liquid inlet and liquid outlet of the housing 110, the size of the first filter layer 120 is twice the size of the second filter layer 130. That is, with the same diameter, the height of the first filter layer 120 is greater than the height of the second filter layer 130. This increases the contact area between the first filter layer 120 and the liquid agent, ensuring sufficient contact and achieving a better filtration effect by removing more large-diameter particulate impurities. When the liquid agent passes through the second filter layer 130, the filtration efficiency of the second filter layer 130 is improved, thereby enhancing the overall filtration efficiency.

[0038] It should be noted that when the second filter layer 130 includes a filter membrane 131 and a positioning ring 132, the height of the second filter layer 130 refers to the overall height of the filter membrane 131 and the positioning ring 132.

[0039] Based on the same design concept, this embodiment can also provide an infusion pump device, see reference. Figure 1 or Figure 2 The infusion pump device may include a drug storage module 200, a drug conduit 300, and the filtration module 100 described in the above embodiments. As mentioned earlier, the filtration module 100 is located between the drug storage module 200 and the drug conduit 300, and is used to filter the liquid drug before it flows into the drug conduit 300 to remove impurity particles from the liquid drug. This not only prevents impurity particles in the liquid drug from clogging the drug conduit 300, but also ensures the injection effect.

[0040] Reference Figure 3 , the cross-sectional shape of the medicine conduit 300 at one end of the silica gel plug 140 is plum blossom shape, specifically, as shown in Figure 3 , the cross-section of the medicine conduit 300 for flowing liquid medicine can be considered as a central inner ring area A and a plurality of petal-shaped areas B uniformly distributed along the circumference of the area A, in the case of the same cross-sectional area, compared with the circular cross-section, the diameter of the inner ring area A of the plum blossom cross-section is smaller than the diameter of the circular cross-section. When the liquid medicine enters the medicine conduit 300, even if the liquid medicine still contains particulate impurities, the particulate impurities enter the medicine conduit 300 through the inlet corresponding to the area A, and stay in the medicine conduit 300 by friction with the medicine conduit 300, and the liquid medicine can also flow normally into the medicine conduit 300 through the plurality of B areas, thereby reducing the risk of blocking the medicine conduit 300.

[0041] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A filter module for filtering of a liquid medicament in an infusion pump device, characterized in that, The filter module comprises a housing, a first filter layer, a second filter layer and a silica gel plug; The housing is provided with a liquid inlet and a liquid outlet at opposite sides, the first filter layer and the second filter layer are sequentially filled in the housing along the direction from the liquid inlet to the liquid outlet, the silica gel plug covers the liquid outlet, and the silica gel plug is in sealing cooperation with the liquid outlet; The diameter of the particle impurities filtered by the first filter layer is larger than the diameter of the particle impurities filtered by the second filter layer.

2. The filter module of claim 1, wherein, The material of the first filter layer is sponge or polyethylene.

3. The filter module of claim 1, wherein, The second filter layer comprises a filter membrane, or the material of the second filter layer is polyethylene.

4. The filter module of claim 3, wherein, When the second filter layer comprises a filter membrane, the second filter layer further comprises a positioning ring located on the side of the filter membrane away from the first filter layer. The opposite sides of the positioning ring are in abutment with the filter membrane and the silica gel plug, so that the filter membrane is attached to the first filter layer.

5. The filter module of claim 3, wherein, When the material of the second filter layer is polyethylene, the side of the silica gel plug facing the second filter layer is provided with an annular abutment portion, and the side of the annular abutment portion facing the second filter layer is in abutment with the second filter layer.

6. The filter module of claim 4 or 5, wherein, The size of the first filter layer is twice the size of the second filter layer along the arrangement direction of the liquid inlet and the liquid outlet.

7. The filter module of claim 1, wherein, The first filter layer is used to filter particle impurities with a diameter of 100 μm-1 mm.

8. The filter module of claim 1, wherein, The second filter layer is used to filter particle impurities with a diameter of 0.2 μm-100 μm.

9. An infusion pump device, characterized by The filter module is arranged between the medicament storage module and the medicament conduit, and one end of the medicament conduit is arranged in the silica gel plug and in communication with the inside of the housing. The cross-sectional shape of the end of the medicament conduit arranged in the silica gel plug is plum blossom shape.

10. The infusion pump device of claim 9, wherein, ​

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