Patent Application
20240285850
The present invention mainly relates to the field of medical instruments, in particular to a drug infusion device with elastic anti-reversal member.
A drug infusion device is a medical device that achieves the purpose of disease treatment by continuously infusing drugs into the patient's body. Drug infusion devices are widely used in the treatment of diabetes. Insulin is continuously infused into the patient's skin according to the dosage required by the human body, to simulate the secretory function of the pancreas, thereby maintaining the stability of the patient's blood glucose. The drug fluid is usually stored inside the infusion device. In the existing drug infusion device, the infusion device is usually pasted directly on the patient's body through a medical tape, and the patient operates a remote device for infusion.
At present, in an infusion device where a single pawl pushes the gear to rotate and completes drug infusion, it is usually necessary to provide an additional fixed pawl, or two oppositely arranged pawls, or an additional friction component to prevent anti-reversing. At this time, additional pawls or friction components need to be provided in the infusion device making the infusion device with many components and complicated arrange design, thus lowering the space utilization rate inside the infusion device, what's more it cannot offer elastic force to prevent reversing.
Therefore, there is an urgent need for a drug infusion device with a simple arrange desig, high space utilization and can offer elastic force to prevent anti-reversing in prior art.
The invention discloses a drug infusion device with elastic anti-reverse member. At least one elastic member is provided on the drive wheel cover of the infusion mechanism module, abutted against the drive wheel assembly. The elastic member can provide variable elastic friction within a certain range and can better prevent the drive wheel from reversing. The elastic member is provided on cover, thus there is no need for other components to carry it, making full use of the internal space of the infusion device, increasing the compactness of the internal design, and assisting the cover to elastically fix the driving wheel and enhance the user experience.
The invention discloses a drug infusion device with elastic anti-reverse member that includes an infusion mechanism module, that includes: an infusion mechanism module, the infusion mechanism comprising: a reservoir, configured to containing the drug to be infused, and is provided with a screw and a piston connected with the screw; a drive wheel assembly, the driving wheel assembly includes a driving wheel, a driving tube and a cover, the cover is used to fix the driving wheel, and the cover is also provided with at least one elastic member, abutting against the drive wheel assembly; a driving unit with a driving end that pushes the driving wheel to rotate; a power unit and a reset unit connected with the driving unit, the power unit exerts a force on the driving unit to make the driving wheel move forward, and the reset unit exerts a force on the driving unit to reset the driving end; a control mechanism module, electrically connected with the infusion mechanism module, the control mechanism module controls the power unit to apply a force on the driving unit; and an adhesive patch, for attaching the infusion mechanism module and the control mechanism module to the skin surface.
According to one aspect of the present invention, the elastic member is one of a compression spring, a tension spring, and a torsion spring.
According to one aspect of the present invention, one end of the torsion spring is abutted against the driving tube.
According to one aspect of the present invention, the elastic member is an elastic rod.
According to one aspect of the present invention, a groove is provided on the top of the cover, for engaging the elastic rod.
According to one aspect of the present invention, the elastic rod is abutted against the driving tube and/or the side surface of the driving wheel.
According to one aspect of the present invention, the infusion device also includes a frame for carrying the components of the infusion mechanism module, the cover is provided with a plurality of cover engaging portions, and the frame is provided with a plurality of frame engaging portion to engage with the cover engaging portions.
According to one aspect of the present invention, an elastic member is arranged on at least one of the cover engaging portion.
According to one aspect of the present invention, the elastic member is one or more of silicone, rubber, latex, and spring steel.
According to one aspect of the present invention, the silica gel and the cover engaging portion are integrated formed.
According to one aspect of the present invention, the elastic member and the reset unit are the same member.
According to one aspect of the present invention, the infusion mechanism module and the control mechanism module are designed separately, and the control mechanism module can be reused.
According to one aspect of the present invention, the infusion mechanism module and the control mechanism module are disposed of in one housing, discarded together after a single-use.
According to one aspect of the present invention, the adhesive patch comprises a tape and a protective film, the surface of the tape is provided with dense ventilation holes arranged evenly.
Compared with the prior art, the technical solution of the present invention has the following advantages:
In the drug infusion device with elastic anti-reverse member, at least one elastic member is provided on the drive wheel cover of the infusion mechanism module, abutted against the drive wheel assembly. By applying pressure to the drive wheel assembly, the static friction force on the drive wheel can be increased to prevent the drive wheel from reversing. The elastic member can provide variable elastic friction within a certain range and can better prevent the drive wheel from reversing, improving the accuracy of drug infusion and eliminating safety hazards. The elastic member is provided on cover, thus there is no need other components to carry it, making full use of the internal space of the infusion device, increasing the compactness of the internal design, and assisting the cover to elastically fix the driving wheel and enhance the user experience.
Furthermore, the elastic member is a torsion spring, which can provide a wide range of elastic force. At least one end of the torsion spring is abutted against the driving tube, and the abutment position of the other end can be selected according to actual needs, so it can better elastically fix the driving wheel and prevent the driving wheel from reversing.
Furthermore, the elastic member is one or more of compression springs, extension springs, torsion springs, U-shaped elastic rod, L-shaped elastic rod, silicone, rubber, latex, and spring steel. The elastic member's type, quantity, location, layout, such as the position of the elastic member abutted against the driving wheel assembly can be selected according to actual needs, and it is flexible and diverse, and can make full use of the internal space of the infusion device and effectively reduce the volume of the infusion device.
Furthermore, the silica gel and the cover engaging portion are integrated formed, symmetrically abutted on both sides of the drive tube to provide a stable elastic friction force range to prevent the drive wheel from reversing, and at the same time, the driving wheel can be elastically fixed to further reduce the quantity of the components and the volume of the infusion device.
Furthermore, the frame is provided with elastic conductor positioning post, conductive platform positioning post and stopper, conductive tower-spring, and driving unit positioning table, making full use of the internal space, improving the integration of the internal arrangement, and ensuring connection stability and electrical connection reliability of all parts.
Furthermore, the adhesive patch includes a tape and a protective film. The surface of the tape is provided with dense ventilation holes arranged evenly, which makes the tape breathable, and can help the patient to discharge the water vapor and sweat secreted by the skin of the patient, and avoid the water vapor and sweat to soak and crease the patient's skin.
As mentioned above, in the infusion device where a single pawl pushes the gear to rotate and completes drug infusion, additional fixed pawl or friction component is needed to prevent driving wheel from reversing, making the infusion device with many components and complicated arrange design, thus lowering the space utilization rate inside the infusion device, and it cannot offer elastic force to prevent reversing.
In order to solve this problem, the present invention provides a drug infusion device with elastic anti-reverse member. At least one elastic member is provided on the drive wheel cover of the infusion mechanism module, abutted against the drive wheel assembly. The elastic member can provide variable elastic friction within a certain range and can better prevent the drive wheel from reversing. The elastic member is provided on cover, thus there is no need for other components to carry it, making full use of the internal space of the infusion device, increasing the compactness of the internal design, and assisting the cover to elastically fix the driving wheel and enhance the user experience
Various exemplary embodiments of the present invention will now be described in detail regarding the figures. The relative arrangement of the components and the steps, numerical expressions and numerical values outlined in the embodiments are not construed as limiting the scope of the invention.
In addition, it should be understood that, for ease of description, the dimensions of the various components shown in the figures are not necessarily drawn in the actual scale relationship; for example, the thickness, width, length or distance of certain units may be exaggerated relative to other mechanism modules.
The following description of the exemplary embodiments is merely illustrative and does not limit its application or use to the invention. The techniques, methods, and devices are known to those of ordinary skill in the art and may not be discussed in detail. However, such techniques, methods, and devices should be considered as part of the specification.
It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once an item is defined or illustrated in a drawing, it will not be discussed further in the following description of the drawings.
In the embodiment of the present invention, the skin patch drug infusion device comprises a control mechanism module 100, an infusion mechanism module 110 and an adhesive patch 120, filling module 120, which will be described separately below. In other embodiments of the present invention, the patch-type drug infusion device may include more parts, which are not specifically limited here.
The patch-type drug infusion device refers to a tubing-free infusion device that is entirely pasted on the user's skin surface by the one piece of adhesive patch 120. And the infusion device is provided with an infusion needle unit 121, integrated on the infusion device, instead of a long tube; therefore, the drug can be directly infused from the drug reservoir 131 to the subcutaneous tissue through the infusion needle unit 121.
In the embodiment of the present invention, the infusion mechanism module 110 and the control mechanism module 100 are designed separately and connected by a waterproof plug or directly engaged and electrically connected into a whole. Details regarding how the reliability of the electrical connection has been improved when the infusion mechanism module 110 and the control mechanism module 100 are directly engaged and electrically connected into a whole will be described below. The infusion mechanism module 110 can be reused, and the control mechanism module 100 is discarded after a single use, as shown in
The patch-type drug infusion device of the embodiment of the present invention includes a control structure 100, which receives signals or information from a remote device or a body fluid parameter detection device (such as CGM), and controls the infusion device to infuse drug(s) accordingly.
Inside the housing 101 of the control structure 100 are disposed of program modules, circuit board(s) and related electronic units for receiving signals or issuing control instructions, as well as other mechanical units or structures necessary for realizing the infusion function, which is not limited herein. In another embodiment of the present invention, a power supply 133 can also be provided in the control structure. Preferably, in the embodiment of the present invention, the power supply 133 is provided in the infusion structure 110, which will be described below.
The control mechanism module 100 further includes the first electrical contact 103 exposed on its surface. The first electrical contact 103 is used as a circuit connection terminal to connect the internal circuits provided in the control mechanism module 100 and the infusion mechanism module 110, respectively. The embodiment of the present invention does not specifically limit the positions of the first electrical contact 103.
Compared with the plug connector used as a connection terminal in the prior arts, the contact area of the electrical contact is much smaller, which provides more flexibility to the mechanism module design, and can effectively reduce the volume of the control mechanism module. At the same time, these smaller electrical contacts can be directly connected to the internal circuit or electrical components. They could also be directly soldered on the circuit board, which helps to optimize the design of the internal circuit and effectively reduce the complexity of the circuit, thereby saving costs and reducing the volume of the infusion system. Furthermore, the electrical contacts are exposed on the surface of the control mechanism module 100 to facilitate electrical connection with connection ends on other mechanism modules.
The type of the first electrical contact 103 includes rigid metal pins or elastic conductive members. Preferably, in the embodiment of the present invention, the first electrical contact 103 is a rigid metal pin. One end of the first electrical contact 103 is electrically connected to the connection end provided inside the control mechanism module 100. In contrast, the other end is exposed on the surface of the lower housing 101b. The rest part of the first electrical contact 103 is tightly embedded in the housing 101, thus keeping the internal control mechanism module 100 isolated from the outside.
The elastic conductive member includes conductive spring, conductive silica gel, conductive rubber, or conductive leaf spring. One end of the elastic conductive member is used to electrically connect with the internal connection end in the control mechanism module 100, while the other end is used to connect with other connection ends electrically.
As in an embodiment of the present invention, the first electrical contact 103 is a conductive spring. When the electrical contacts are in contact with each other, the elasticity of the conductive spring can enhance the reliability of the electrical connection. Similar to the rigid metal pin, one end of the conductive spring is exposed on the surface of the lower housing 101b. In contrast, the remaining part of the conductive spring is tightly embedded in the housing 101 and electrically connected with internal circuits or electrical components. The connection end disposed inside the control mechanism module 100 can be a conductive lead, a specific part of a circuit, or an electrical element.
It should be noted that the “tightly embedded” in the embodiment of the present invention suggests that there is no gap between the electrical contact and the housing 101, keeping the control mechanism module 100 tightly sealed. The following “tightly embedded” has the same meaning as here.
In another embodiment of the present invention, the first electrical contact 103 is a conductive spring, but it is not tightly embedded in the housing 101. Instead, a sealing element is provided in a groove, both of which are disposed around the area where the first electrical contacts 103 are located, thus sealing the electrical contact area and the control mechanism module 100.
In the embodiment of the present invention, the control mechanism module 100 is further provided with the first engaging portions 102, which is used to fasten the second engaging portion 112 disposed on the infusion mechanism module 110 to assemble the control mechanism module 100 infusion mechanism module 110. Details regarding how the mechanism works to enable the electrical connection between the first electrical contacts 103 and the second electrical contacts 113 (as shown in
The first engaging portion 102 and the second engaging portion 112 include one or more hooks, blocks, holes, and slots that can be engaged with each other. The positions of the hooks, blocks, holes, and slots can be flexibly adjusted, according to the shape and mechanism module features of the control mechanism module 100 and the infusion mechanism module 110, such as disposed in the interior or on the surface of the corresponding mechanism module, which is not specifically limited herein.
In the embodiment of the present invention, the control mechanism module 100 is further provided with a concave 104 that fits the convex portion 114 disposed at the bottom of the case of the infusion mechanism module 110, which will be described in detail below. Preferably, the first electrical contacts 103 are provided in the concave 104, as shown in
In the embodiment of the present invention, a buzzer (not shown) is also provided in the control structure 100. When the infusion process starts or ends, the infusion device malfunctions, the drug is exhausted, the control structure 100 issues an error command or receives an error message, etc., the buzzer is used to issue alarm signals, such as sound or vibration, notifying the user to adjust or replace the device in time.
Preferably, in the embodiment of the present invention, the housing 101 of the control structure 100 is provided with a sound-permeable outlet 105 to allow the sound alarm signal from the buzzer to be sent out. In order to achieve a good sealing effect and ensure the normal operation of the buzzer, a waterproof sound-permeable membrane (not shown) is disposed between the sound-permeable outlet 105 and the buzzer. Therefore, the waterproof sound-permeable membrane needs to have a certain porosity to ensure the sound transmission but prevent water molecules penetration.
Compared with the traditional technical solution in which the buzzer is entirely enclosed in the control structure 100, because of the sound-permeable outlet 105, a less loud sound signal emitted from the buzzer would be enough to raise the user's attention, which reduces the energy consumption of the buzzer, thereby optimizing the power consumption configuration of the infusion device and saving production costs.
The skin patch drug infusion device further includes an infusion mechanism module 110 with a case. A mechanical module, an electric control module, and other auxiliary modules for completing the drug infusion process are provided inside the case, which will be described in detail below. The case of the infusion mechanism module 110 may include multiple parts. As in the embodiment of the present invention, the case of the infusion system includes an upper case 111a and a lower case 111b.
As mentioned above, in the embodiment of the present invention, the infusion mechanism module 110 is provided with the second engaging portions 112, which is used to engaged and fasten the corresponding first engaging portions 102. The positions where the first engaging portions 102 and the second engaging portions 112 are provided correspondingly.
In the embodiment of the present invention, the infusion structure 110 is provided with second electrical contacts 113, which are used to press against the corresponding first electrical contacts 103 to create an electrical connection between the control structure 100 and the infusion structure 110. The compression between these two corresponding electrical contacts disposed on different structures can improve the reliability of the electrical connection. Similar to the first electrical contacts 103, one of the second electrical contact 113 also includes a rigid metal pin and an elastic conductive member. Preferably, in the embodiment of the present invention, the second electrical contact 113 is a conductive spring. Similarly, the conductive spring can improve the electrical connection performance. A groove is also arranged around the area where the second electrical contact 113 is disposed, and a sealing member 115 is arranged in the groove. Similarly, the elasticity of the conductive spring can further improve the electrical connection performance.
Preferably, in the embodiment of the present invention, the two ends of the conductive spring have different diameters. And the diameter of the end exposed to the outside of the infusion mechanism module 110 is shorter than that of the end inside the infusion mechanism module 110. In this way, the conductive spring can be held in the case because of the longer diameter; Thus, when the control mechanism module 100 is not installed on the infusion mechanism module 110, the longer diameter of the inner end can prevent the conductive spring from detaching from the infusion mechanism module 110.
The embodiment of the present invention does not limit the position at where second electrical contacts 113 are arranged, as long as it can be electrically connected to the corresponding first electrical contacts 103. Preferably, in the embodiment of the present invention, the upper case 111a of the infusion mechanism module 110 includes a convex portion 114 where the second electrical contacts 113 are disposed, as shown in
In other embodiments of the present invention, the convex portion 114 may be provided on the lower case 111b. When the infusion mechanism module 110 includes an integral case, the convex portion 114 will be a part of the integral case not specifically limited herein.
The method of assembling the control mechanism module 100 and the infusion mechanism module 110 to each other includes pressing the control mechanism module 100 on the infusion mechanism module 110 along the thickness direction of the infusion mechanism module 110, thereby engaging the first engaging portion 102 and the second engaging portion 112; or pressing the control mechanism module 100 on the infusion mechanism module 110 along the length direction of the infusion mechanism module 110. Alternatively, the control mechanism module 100 can be pressed along with any angle between the thickness direction and the length direction of the infusion mechanism module 110, making the first engaging portion 102 and the second engaging portion 112 engaged with each other. Preferably, in the implementation of the present invention, the method by which the control mechanism module 100 and the infusion mechanism module 110 are assembled is to press the control mechanism module 100 on the infusion mechanism module 110 along with the thickness direction of the infusion mechanism module 110, making the first engaging portion 102 and the second engaging portion 112 engaged with each other, as shown the installation direction in
In the embodiment of the present invention, the lower case 111b of the infusion mechanism module 110 further includes an outward extending portion 116. A block 117 is provided outside the outer extending portion 116, as shown in
It should be noted here that “outer” and “outside” are relative to the main body of the infusion mechanism module 110, where they belong to a concept of the relative position, as shown in
In the embodiment of the present invention, the outer end of the outer extending portion 116 is also provided with a pressing portion 118 for releasing the blocking effect of block 117. While the user is replacing the infusion mechanism module 110, the control mechanism module 100 can be released from block 117 by pressing the pressing portion 118 with a finger. Then, the user can remove the control mechanism module 100 from the infusion mechanism module 110 with two fingers.
Another embodiment of the present invention can also be provided with an unlocking hole 119 disposed of in the inner side of block 117. While the pressing portion 118 is pressed, a finger can enter the unlocking hole 119, thereby pushing the control mechanism module 100 out to separate the control mechanism module 100 from the infusion mechanism module 110. In the embodiment of the present invention, the unlocking hole 119 is square. The square unlocking hole 119 can facilitate the smooth entry of fingers. In other embodiments of the present invention, the unlocking hole 119 may also have other shapes, which is not specifically limited here.
The lower case 111b of the infusion mechanism module 110 is also provided with one or more crease grooves 140. Two crease grooves 140 are provided on both sides of the unlocking hole 119, as shown in
Preferably, in the embodiment of the present invention, two crease grooves 140 are provided at the both ends of block 117, respectively, as shown in
The skin patch drug infusion device further includes a needle unit 121, used for infusing the drug to the subcutaneous tissue.
An adhesive patch 120 is also provided on the bottom of the lower case 111b to attach the infusion device to the user's skin surface. The adhesive patch includes a tape and a protective film. The surface of the tape is provided with dense ventilation holes arranged evenly, which makes the tape breathable, and can help the patient to discharge the water vapor and sweat secreted by the skin of the patient, and avoid the water vapor and sweat to soak and crease the patient's skin.
In the embodiment of the present invention, the internal mechanism module 130 includes mechanical units and electronic control units used to realize the infusion function, such as a drug reservoir 131, a drug outlet 132, a power supply 133, a driving wheel 134, a screw 135, a circuit board (not shown), a driving unit 1310, etc. The movement of the driving unit 1310 drives the driving wheel 134 to rotate, thus making the screw 135 push the piston 312 (as shown in
In the embodiment of the present invention, the power supply 133 is a conventional button battery. In other embodiments of the present invention, the power supply 133 may also be other types of batteries, as long as it can meet the requirements for supplying power to the infusion system. Preferably, in the embodiment of this present invention, the type of the power supply 133 is a double-row battery pack; that is, two rows of button batteries are arranged on both sides of the driving wheel 134, respectively, as shown in
The infusion mechanism module 110 in the embodiment of the present invention is also provided with a circuit board or multiple three-dimensional circuits coated on the surface of a part of the mechanism module for supplying power to specific structural units. According to the internal arrangement characteristics of the infusion device, the shape and position of the three-dimensional circuit can be flexibly designed, which can make the full use of the internal space of the infusion mechanism module, making the arrangement more compact. The circuit board is a hard/rigid circuit board or a flexible circuit board. Preferably, in the embodiment of the present invention, the circuit board is flexible. The shape of the flexible circuit board is adjustable, allowing it to be flexibly designed according to the internal space of the infusion mechanism module 110. At the same time, multiple connection ends can be provided on the flexible circuit board to be electrically connected to second electrical contacts 113, thereby connecting the circuits of the control mechanism module 100 and the infusion mechanism module 110, allowing the infusion system to perform drug infusion function.
An elastic conductor 136 is also provided inside the infusion mechanism module 130. The elastic conductor 136 is electrically connected to the power supply 133, and the specific connection end on the circuit board (or three-dimensional circuit), thereby supplying power to specific structural units.
In the embodiment of the present invention, the elastic conductor 136 includes a first elastic conductor 136a and a second elastic conductor 136b, the first elastic conductor 136a is connected with the power supply 133, and the second elastic conductor 136b is connected with the specific connection end on the circuit board (or three-dimensional circuit). At least a protrusion 1361 is provided on the first elastic conductor 136a and the second elastic conductor 136b, which facilitate the point contact connection or the line contact connection between the first elastic conductor 136a and the power supply 133, and also facilitate the point contact connection or the line contact connection between the second elastic conductor 136b and the specific connection end on the circuit board (or three-dimensional circuit), thereby improving the electrical connection reliability between the elastic conductor 136 and the power supply 133, and the specific connection end on the circuit board (or three-dimensional circuit). When the first elastic conductor 136a and the second elastic conductor 136b is flat, during use, it is likely to cause a poor connection between the elastic conductor 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit), thereby affecting the use effect. In the embodiment of the present invention, protrusion 1361 may be a linear protrusion formed by bending the first elastic conductor 136a or the second elastic conductor 136b, or it may be several dots or other shapes of protrusions formed by other means on the first elastic conductor 136a or the second elastic conductor 136b. The form and number of the protrusions 1361 on the first elastic conductor 136a or the second elastic conductor 136b can be the same or different. Here, the form, number, and forming method of the protrusions 1361 are not specifically limited, as long as the point contact connection or line contact connection between the elastic conductor 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) can be enhanced, improving the reliability of the electrical connection.
In the embodiment of the present invention, the first elastic conductor 136a and the second elastic conductor 136b are approximately arranged in an “L” shape, the first elastic conductor 136a is approximately parallel to the frame 137, and the second elastic conductor 136b is approximately perpendicular to the frame 137. In other embodiments of the present invention, the first elastic conductor 136a and the second elastic conductor 136b can also be arranged in other shapes, which are not specifically limited here, as long as the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) can be electrically connected. An insulating member 1362 is also provided at the junction of the first elastic conductor 136a and the second elastic conductor 136b (as shown at the position L in
In the embodiment of the present invention, the elastic conductor 136 may be a sheet metal including the first elastic conductor 136a and the second elastic conductor 136b or may be intergrated by the single first elastic conductor 136a and the single second elastic conductor 136b which are directly electrically connected or indirectly electrically connected with other conductive elements, which is not limited herein. When the elastic conductor 136 is a sheet metal including the first elastic conductor 136a and the second elastic conductor 136b, which not only make the elastic conductor 136 with simple technological process, firm connection between the elastic conductor 136a and the second elastic conductor 136b, but also reduce the volume of the elastic conductor 136, save the material and the raw material and technological cost. When the elastic conductor 136 is intergrated by directly electrically connecting the first elastic conductor 136a and the second elastic conductor 136b or indirectly electrically connected with other conductive elements, the elastic member can be flexibly selected according to the requirements of the specific connecting components to optimize the internal design of the infusion mechanism module.
In the embodiment of the present invention, the frame 137 is further provided with a positioning post 138, the elastic conductor 136 is provided with an opening corresponding to the positioning post 138, and the elastic conductor 136 is sleeved on the positioning post 138 through the opening, so that the elastic conductor 136 is fixed to the frame 137. At the same time, the positioning post 138 is melted by hot melting to further fixed the elastic conductor 136 and to prevent the elastic conductor 136 from shaking due to long-term use or other reasons, which cause the poor electric connection between the elastic conductor 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) and affect the use.
In the embodiment of the present invention, a boss 139 is also provided on frame 137. The boss 139 is located below the first elastic conductor 136a to prevent the protrusion 1361 of the first elastic conductor 136a from being flattened or deformed during long-term use, which results in a poor electrical connection between the first elastic conductor 136a and the specific connection end on the circuit board (or three-dimensional circuit), causing a malfunction. Preferably, the setting position of the boss 139 deviates from the projection position of the protrusion 1361 on the frame 137 and is close to the position post 138. On the one hand, it can prevent the circuit board from being damaged by hard contact or compression between the first elastic conductor 136a and the specific connection end on the circuit board (or three-dimensional circuit). On the other hand, it can ensure the elastic electrical contact between the first elastic conductor 136a and the specific connection end on the circuit board (or three-dimensional circuit).
Similar to the elastic conductive member above mentioned, the type of the elastic conductor 136 includes a conductive spring, a conductive leaf spring, a conductive rubber, a conductive silica gel, etc., which are not specifically limited herein, as long as they can meet the requirements for electrically connecting the power supply 133 to specific connection ends on the circuit board (or three-dimensional circuit). Preferably, in the embodiment of the present invention, the elastic conductor 136 is the conductive leaf spring. Since the infusion mechanism module 110 has a double-row battery pack, the multiple conductive leaf springs are also designed as a double-row pack, as shown in
As shown in
The infusion mechanism module 110 is also provided with a conductive tower-spring 1315 sleeved on the rotating shaft 1313, with one end abuts the drive unit 1310, and the other end electrically connected to a specific connection end on the circuit board or three-dimensional circuit for fixing the drive unit 1310, at the same time, realize the electrical connection between the driving unit 1310 and specific connection ends on the circuit board or three-dimensional circuit.
In the embodiment of the present invention, the conductive tower spring 1315 includes a part A with a small diameter at the central part in the axial direction and a part B and a part C with a large diameter at both ends. The diameter of part A remains the same, and the rotation shaft 1313 is fixed by interference fit, further, fix the drive unit 1310, and at the same time, part B abuts the drive unit 1310 to prevent the drive unit 1310 from shaking due to instability when it is accidentally touched, causing the drive end 1312 to push the drive wheel 134 forward, which affects the accuracy of the infusion. The diameter of the B part and the C part gradually expand towards the two ends in a horn-like shape. When the B part and the C part are respectively electrically connected to the drive unit 1310 and the specific connection ends on the circuit board or three-dimensional circuit, the conductive tower-spring 1315 is compressed; therefore, part B and part C have multiple turns, and at least 2-3 turns of springs are in contact with the driving unit 1310 and the specific connection ends on the circuit board or three-dimensional circuit at the same time, thereby improving the electrical connection reliability of the infusion device. Preferably, in the embodiment of the present invention, parts B and C of the conductive tower-spring 1315 are symmetrical, and the two ends can be assembled at will to avoid assembly misalignment.
In the embodiment of the present invention, at least one conductive platform 1314 is provided inside the infusion mechanism module 110. Specifically, when the driving unit 1310 includes two driving arms 1312, there are two corresponding power units 1311 and conductive platforms 1314, as shown in
The conductive platform 1314 includes a conductive platform body 141 and a conductive arm 142. The conductive arm 142 is an elastic conductive element. At least one conductive platform protrusion 1421 is provided on the conductive arm 142 to facilitate the connection with specific connection ends on the circuit board (or three-dimensional circuit), improving the electrical connection reliability of the conductive platform 1314 and the specific connection ends on the circuit board (or three-dimensional circuit). When the conductive arm 142 of the conductive platform 1314 is flat, it is likely to cause the poor connection between the conductive platform 1314 and specific connection ends on the circuit board (or three-dimensional circuit) during use, thereby affecting the use effect. In the embodiment of the present invention, conductive platform protrusion 1421 may be a linear protrusion formed by bending conductive arm 142, or it may be several dots or other shapes of protrusions formed by other means on conductive arm 142. Here, the form, number, and forming method of conductive platform protrusion 1421 are not specifically limited, as long as the point contact connection or line contact connection between the conductive platform 1314 and the specific connection ends on the circuit board (or three-dimensional circuit) can be enhanced, improving the reliability of the electrical connection. In the embodiment of the present invention, the conductive platform body 141 further includes an end portion 1411 of the conductive platform body, and the power unit 1311 is an electric drive type linear driver or an electric heating type linear driver, such as a shape memory alloy, which is connected to the conductive platform body 141 by die casting, causing stable connection and highly reliable electrical connection. Specifically, the power unit 1311 is put into the end portion 1411 of the conductive platform body after being folded in half and then connected to the end portion 1411 of the conductive platform body 141 by die-casting method further improving the reliability of the electrical connection.
In the embodiment of the present invention, the conductive platform 1314 may be a sheet metal including the conductive platform body 141 and conductive arm 142, or may be formed by the single conductive platform body 141 and the single conductive arm 142 directly electrically connected or indirectly electrically connected with other conductive elements, which is not limited herein. When the conductive platform 1314 is a sheet metal including the conductive platform body 141 and the conductive arm 142, which not only make the conductive platform 1314 with simple technological process, firm connection between the conductive platform body 141 and conductive arm 142, but also reduce the volume of the conductive platform 1314, save the material and the raw material and technological cost. When the conductive platform 1314 is integrated by the single conductive platform body 141 and the single conductive arm 142 directly electrically connected or indirectly connected with other conductive elements, the conductive member can be flexibly selected according to the requirements of the specific connecting components to optimize the internal design of the infusion mechanism module.
Similarly, the conductive platform body 141 and the conductive platform body end portion 1411 can also be sheet metal or integrated by directly or indirectly electrically connecting with other conductive elements, which is not limited herein. The conductive platform 1314 is a sheet metal including the conductive platform body 141, the conductive arm 142 and the conductive platform body end portion 1411, or the two of them can be a sheet metal and then integrated with the third party directly or indirectly through other conductive elements, or all of the three parts are directly integrated or indirectly integrated by electrical connection with other conductive elements, and there is no specific limitation here. The benefits of various forming methods are described above, so it will not be repeated here. Preferably, in the embodiment of the present invention, the conductive platform body 141, the conductive arm 142 and the conductive platform body end portion 1411 are integrally formed.
In the embodiment of the present invention, a plurality of stoppers 1316 are provided on the frame 137 for accommodating and limiting the position of the conductive platform 1314, the frame 137 is further provided with a conductive platform positioning post 1317, the conductive platform 1314 is provided with an opening corresponding to the conductive platform positioning post 1317, and the conductive platform 1314 is sleeved on the conductive platform positioning post 1317 through the opening, so that the conductive platform 1314 is fixed to the frame 137. At the same time, the conductive platform positioning post 1317 is melted by hot melting to further fixed the conductive platform 1314 and to prevent the conductive platform 1314 from shaking due to long-term use or other reasons, which cause the poor electric connection between the conductive platform 1314 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) and affect the use.
In the embodiment of the present invention, a conductive platform boss (not shown) is also provided on the frame 137, and the conductive platform boss is located below the conductive arm 142 to prevent the conductive platform protrusion 1421 of the conductive arm 142 from being flattened or deformed during long-term use, which results in a poor electrical connection between the conductive arm 142 and the specific connection end on the circuit board (or three-dimensional circuit), causing a malfunction. Preferably, the setting position of the conductive platform boss deviates from the projection position of the conductive platform protrusion 1421 on the frame 137 and it is close to the conductive platform positioning post 1317. On the one hand, it can prevent the circuit board from being damaged by hard contact or compression between the conductive arm 142 and the specific connection end on the circuit board (or three-dimensional circuit). On the other hand, it can ensure the elastic electrical contact between the conductive arm 142 and the specific connection end on the circuit board (or three-dimensional circuit).
Similar to the elastic conductor 136 above mentioned, the type of the conductive platform 1314 includes a conductive spring, a conductive leaf spring, a conductive rubber, a conductive silica gel, etc., which are not specifically limited herein, as long as they can meet the requirements for electrically connecting the power unit 1310 to specific connection ends on the circuit board (or three-dimensional circuit).
The driving wheel assembly includes a driving wheel body 16 and a movable block 18. The driving wheel body 16 includes a driving wheel 161, a driving tube 162, which is provided with threads for accommodating the screw 135, and a connecting piece 163 arranged at the end of the driving wheel 161. The connecting piece 163 is provided with a connecting portion 1631, operatively connected with the movable block 18. The movable block 18 is provided with threads to accommodate the screw 135. The movable block 18 is also provided with a movable block connecting rod 181, which is mobily connected with the connecting portion 1631. After the connecting rod 181 is mobily connected with the connecting portion 1631, the movable block 18 can rotate around the connecting rod 181 to open or close the movable block 18. When the movable block 18 is opened, the screw 135 can slide to the driving wheel body 16, and when the movable block 18 is closed, the screw 135 cannot slide to the driving wheel body 16, which will be described in detail below.
The driving wheel assembly further includes a shield 15, and a plurality of shield engaging portions 151 are provided on the shield 15 for engaging with the frame 17. The frame 17 is provided with a frame groove 171 for accommodating the driving wheel body 16 and a plurality of frame engaging portions 172 for engaging with the shield engaging portions 151. After the driving wheel body 16 and the movable block 18 are connected and put into the frame groove 171, the shield 15 is assembled to the frame 17. By the engagement of the frame engaging portion 173 and the shield engaging portion 151, the driving wheel body 16 and the movable block 18 are fixed in the frame 17 to prevent the shaking of the driving wheel assembly and affect the accuracy of drug infusion.
The frame engaging portions 173 and the shield engaging portion 151 include hooks, blocks, holes, and grooves that can be engaged with each other. The position of the engaging portions can be flexibly designed according to the shape and design of the frame 17 and the shield 15, and is not specifically limited here. Preferably, the space formed by the plurality of frame engaging portions 173 and the plurality of shield engaging portions 151 can accommodate the driving wheel body 16 and the movable block 18 to prevent the driving wheel body 16 from shaking.
In the embodiment of the present invention, the shield 15 is also provided with at least one elastic arm 152 for elastically abutting the drive tube 162, which can further fix the drive wheel body 16, improving the stability of the infusion mechanism module 110 and the accuracy of drug infusion. Preferably, two elastic arms 152 are arranged on both sides of one of the driving wheels 161 and abut against the driving tube 162, respectively. As shown in
The shield 15 is also provided with a baffle 153, and the baffle 153 is provided with a mouth. The main frame 17 is also provided with a card slot 173 on the side close to the reservoir 131 for accommodating the strip (not shown). The strip abuts against the baffle 153 to form a through hole for accommodating the screw 135 and at the same time confine the driving wheel body 16 and the movable block 18 in the frame 17. Preferably, the mouth of the baffle 153 is semi-circular, and the diameter is adapted to the diameter of the screw 135, so as to better accommodate the screw 135 and prevent the screw 135 from shaking greatly under the action of external force.
Preferably, in the embodiment of the present invention, the shield 15 is integrally molded; the technological process is simple, the volume is small, the connection is firm, the material is saved, and the cost is reduced.
The movable block 18 further includes an upper movable block 182 and a lower movable block 183, and the lower movable block 183 is also provided with a lower movable block end 1831. The movable block 18 opened means that the upper movable block 182 is close to the driving wheel 161, and the lower movable block 183 is far away from the driving wheel 161. The thread in the movable block 18 does not engage with the screw 135. The screw 135 can be smoothly slid in the movable block 18 and the driving tube 162. The movable block 18 closed means that the upper movable block 182 is far away from the driving wheel 161, and the lower movable block 183 is close to the driving wheel 161. At this time, the thread in the movable block 18 is engaged with the screw rod 135, and the screw 135 cannot slide in the movable block 18 and the driving tube 162.
In the embodiment of the present invention, an arc-shaped blocking member 174 is also provided on the frame 17 to limit the position of the lower movable block 183. When the movable block 18 is opened, that is, the upper movable block 182 is close to the driving wheel 161 and the lower movable block 183 is far away from the driving wheel 161, the lower movable block end 1831 of the lower movable block 183 is located outside the arc-shaped blocking member 174, so that the movable block 183 is kept open. At this time, the thread in the movable block 18 does not engage with the screw 135, and the screw 135 can slide smoothly in the movable block 18 and the drive tube 162. When the movable block 18 is opened, the reservoir 131 can be filled with the drug. In the filling process to the reservoir 131, the screw 135 can smoothly move to the end of the driving wheel 161 under the pushing action generated during the filling process, until the filling is completed, no need for the assistance of other parts, which can simplify the complexity of the infusion mechanism module, improve the integration level, save cost, and reduce the volume of the infusion mechanism 110, and at the same time maximizing the actual storage volume of reservoir 131.
When the movable block 18 is closed, that is, the movable block 182 is far away from the driving wheel 161 and the lower movable block 183 is close to the driving wheel 161, the lower movable block end 1831 of the lower movable block 183 is located inside the arc-shaped blocking member 174, and the movable block 18 is kept closed. At this time, the thread in the movable block 18 is engaged with the screw 135, and the screw 135 cannot slide in the movable block 18 and the drive tube 162. When the infusion device 110 performs the drug infusion after the drug is filled, the driving end 1312 of the driving unit 1310 pushes the driving wheel 161 forward, and the movable block 18 rotates with the driving wheel 161. During the rotation, after the lower movable block end 1831 bypasses the arc-shaped blocking member 174, since there is no resistance from the arc-shaped blocking member 174, the lower movable block end 1831 falls into the inside of the arc-shaped blocking member 174. At the same time, since the movable block 18 is kept closed, the screw 135 can only move away from the driving wheel 161 under the pushing action of the rotation of the driving wheel 161 and perform the drug infusion. There is no need to worry about the free movement of the screw 135 due to the engagement failure of the screw 135 with the movable block 18 or the drive tube 162, which will affect the infusion effect or even cause the infusion device to disable.
In the embodiment of the present invention, a notch 1611 is provided on the end face of the driving wheel 16, close to the reservoir 131, the shape is adapted to the lower movable block 183, and is used for accommodating the lower movable block 183. When lower movable block end 1831 bypasses the arc-shaped stopper 174 and falls into the inside of the arc-shaped stopper 174, the lower movable block 183 is accommodated in the notch 1611 of the driving wheel 161, making full use of the space of the driving wheel body, optimizing the internal design of the infusion mechanism module to reduce the volume of the infusion device.
It should be noted here that “inside” and “outside” are relative to the arc-shaped blocking member 174, and belong to the concept of relative position. The positional relationship is as shown in
In the infusion device where a single pawl pushes the gear to rotate and completes drug infusion, as shown in
In the embodiment of the present invention, the power unit 1311 includes an electrically powered linear driver or an electrically heated linear driver. Specifically, the power unit 1311 is a shape memory alloy. The reset unit 1320 includes an electrically driven linear actuator, an electrically heated linear actuator, or an elastic member. The types of elastic members include, but are not limited to, compression springs, extension springs, torsion springs, elastic sheets, elastic plates, elastic rods, elastic rubbers, and the like. The elastic member can automatically spring back the driving end 1312 to the original position without external force. Specifically, in the embodiment of the present invention, the reset unit 1320 is a torsion spring. The torsion spring is more conducive to the reset of the driving end 1312.
In an embodiment of the present invention, the elastic member is one of a compression spring, a tension spring, and a torsion spring. Preferably, as shown in
In another embodiment of the present invention, at least one elastic rod is provided on the driving wheel cover 201. As shown in
In yet another embodiment of the present invention, the elastic member is one or more of silicone, rubber, latex, and spring steel. Preferably, as shown in
It should be noted that, in the above-mentioned embodiments of the invention, for the elastic members, such as the torsion spring 203, the U-shaped elastic rod 205, the L-shaped elastic rod 206 and the silicone 207, arranged on the driving wheel cover 201, the types, quantities, positions, layout such as the abutting position on the driving tube 204 or the driving wheel 200, are not specifically limited here, and can be selected according to actual needs. For example, the torsion spring 203 and the silicone 207 can be selected to provide elastic friction at the same time, as shown in
In yet another embodiment of the present invention, the elastic member and the reset unit 1320 are the same member. Preferably, the reset unit 1320 is a torsion spring, one end is connected to the driving unit 1310, and the other end is abutted against the driving tube 204 or side surface of the driving wheel 200. By applying pressure to the driving tube 204 or the side surface of the driving wheel 200, the maximum static friction force on the driving wheel 200 can be increased, thereby preventing the driving wheel 200 from reversing. The location of the reset unit 1320 on the driving wheel cover 200 is not specifically limited here, and may be provided on the top, side or other positions of the driving wheel cover 200. Therefore, in the embodiment of the present invention, the reset unit 1320 can not only provide elastic force to make the driving end 1312 perform the reset movement, but also can provide elastic friction force to prevent the driving wheel from reversing, and at the same time, it can assist the driving wheel cover 200 to elastically fix the driving wheel 200, further reducing the number of parts and reducing the volume of the infusion device.
As a summary, the present invention discloses a drug infusion device with elastic anti-reverse member, at least one elastic member is provided on the driving wheel cover of the infusion device, abutting against the driving wheel assembly, and by applying pressure to the driving wheel assembly, the static friction force on the driving wheel can be increased to prevent the driving wheel from reversing. The type, quantity, location and layout of the elastic members can be flexibly arranged on the driving wheel cover, making full use of the internal space and effectively reducing the volume of the infusion device. The elastic members provide variable elastic friction within a certain range, which can better prevent the driving wheel from reversing. The elastic member is arranged on the driving wheel cover, no other components are needed to carry it, making full use of the internal space of the infusion device, increasing the compactness of the internal design, and the elastic member can also assist the driving wheel cover elastically fix the driving wheel, which greatly enhances the user experience.
While the invention has been described in detail regarding the specific embodiments of the present invention, it should be understood that it will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The appended claims define the scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/117730 | Sep 2021 | WO | international |
This application claims the priority benefit of PCT application no. PCT/CN2021/117730, filed on Sep. 10, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/110057 | 8/3/2022 | WO |
