CN204910337U - A fluid infusion device for being directed at patient doses - Google Patents

Abstract

The utility model provides a fluid infusion device for administering medicine to a patient. The fluid infusion device may include: a liquid storage device for storing infusion fluid; a plunger located inside the liquid storage device and connected to the storage device The liquid reservoir confines the infusion fluid together, and the plunger is configured to be able to move along the liquid reservoir; the injection button, which is operatively synchronized with the plunger, is configured to be operated; the displacement limiting mechanism is arranged in parallel with the liquid reservoir, configured The plunger is configured to move a predetermined distance within the reservoir when the injection button is operated, thereby outputting a predetermined amount of fluid in the reservoir. The implementation of the above-mentioned device can not only reduce the overall size of the device, but also simplify the setting process of the infusion volume, which is convenient for users to use.

Description

Fluid infusion set for administering medication to a patient

technical field

The utility model relates to the field of fluid delivery, in particular to a fluid infusion device capable of realizing pill dose injection and used for administering medicine to patients.

Background technique

Diabetes is a metabolic disease characterized by high blood sugar. Hyperglycemia is generally due to defective insulin secretion or impaired biological action, or a combination of both. Long-term hyperglycemia in diabetic patients can lead to chronic damage and dysfunction of multiple body organs (eg, eyes, kidneys, heart, blood vessels, nervous system, etc.).

The clinical diagnosis of diabetes can be divided into type 1 diabetes and type 2 diabetes. Type 1 diabetes, also known as insulin-dependent diabetes, usually appears in childhood or adolescence, and is a disease that is inherited in families. Type 1 diabetes is an autoimmune disease in which the body's immune system attacks the beta cells in the body that produce insulin, eventually resulting in the body not being able to produce insulin. Such patients need to inject exogenous insulin to control the blood sugar level in the body. Patients with type 1 diabetes generally need to wear electronic insulin pumps for 24 hours, for example, Medtronic Minimed series insulin pumps. Type 2 diabetes, also known as non-insulin-dependent diabetes, generally affects adults, especially obese people, and its condition can lead to weight loss. Possible causes include: insulin resistance, which prevents the body from using insulin effectively; and decreased insulin production, which prevents the body from meeting its needs. Patients with early type 2 diabetes can control and even cure diabetes by improving lifestyle (for example, healthy diet, moderate exercise, safe weight loss, smoking cessation and avoiding second-hand smoke, etc.). Most patients with type 2 diabetes can take oral hypoglycemic drugs to help control blood sugar levels in the body or control blood sugar levels through phased injections of insulin. At present, most patients use insulin pen syringes to inject insulin. The insulin pen has a structure similar to that of a pen, including three parts: the pen body, the pen holder and the pen cover. Before injecting insulin, you need to install the matching insulin refill into the pen holder, then rotate the adjustment button to control the injection volume through the movement of the screw, and then press The injection button drives the pen core through the screw to complete the injection. That is to say, the existing insulin pen needs to manually adjust the movement of the screw each time to control the infusion volume, and the setting process is relatively complicated. Moreover, by arranging the screw rod in the insulin pen, the overall length of the device is increased, which is not conducive to the portable use of the device.

Contents of the invention

In order to solve the above technical problems, the utility model provides a fluid infusion device for administering drugs to patients, which can set the infusion quantity simply and quickly, and can reduce the overall size of the device.

According to the first aspect of the embodiment of the present invention, there is provided a fluid infusion device for administering medicine to a patient, the device may include: a liquid reservoir for storing infusion fluid; a plunger located in the liquid storage Inside the reservoir and together with the reservoir to confine the infusion fluid, the plunger is configured to move along the reservoir; the injection button, operatively synchronized with the plunger, is configured to be operated; the displacement A limiting mechanism, arranged in parallel with the liquid reservoir, is configured to limit the movement of the plunger within the liquid reservoir to a predetermined distance when the injection button is operated, thereby displacing a predetermined amount of fluid in the liquid reservoir output.

In some embodiments, the displacement limiting mechanism may include: a base having a plurality of guide slots with equal lengths, a slider operatively connected to the injection button and configured to be moved when the injection button is pressed. pushes to slide along a first guide chute of the plurality of guide chutes and disengages from the first guide chute and turns into an adjacent second guide chute of the plurality of guide chutes when the injection button is released. chute.

In some embodiments, the displacement limiting mechanism may further include: an energy storage component, operatively connected with the slider, configured to store mechanical energy when the slider slides along the first guide slot and When the slider turns into the second guide chute, the mechanical energy is released so that the slider returns to the state of not being pushed.

In some embodiments, the slider may include: a drive button, operatively connected to the injection button, having a plurality of first protrusions evenly distributed along the circumference that can be embedded in the guide chute, and the first A convex portion has a driving slope, rotates the slider, is operatively engaged with the driving button and the energy storage component, has a plurality of second convex portions evenly distributed along the circumference and can be embedded in the guide chute, and the The second protrusion has a passive slope corresponding to the driving slope.

In some embodiments, the displacement limiting mechanism may include: a matching part having a first opening and a second opening at a fixed distance, an elastic buckle that moves synchronously with the injection button and the plunger, configured to The injection button ejects from the first opening and moves the fixed distance when pressed to fit into the second opening.

In some embodiments, the matching part may further include: a reset button, which is matched with the second opening and configured to be pressed so that the elastic buckle pops out of the second opening.

In some embodiments, the displacement limiting mechanism may further include: an energy storage component, operatively connected to the elastic buckle, configured to move from the first opening to the second opening when the elastic buckle moves. storing mechanical energy and releasing the mechanical energy when the elastic buckle is ejected from the second opening so that the elastic buckle moves the fixed distance to be assembled to the first opening.

According to the second aspect of the embodiment of the present invention, there is provided a fluid infusion device for administering medicine to a patient, and the fluid infusion device may include: a liquid reservoir for storing the fluid to be infused; an injection a button with a plunger capable of moving along the liquid reservoir; a syringe for receiving the liquid reservoir and capable of synchronous movement with the liquid reservoir; a sealing member arranged on the outside of the syringe; the first A hollow piercing member, the base end of the first hollow piercing member communicates with the liquid reservoir, the front end of the first hollow piercing member is sealed in the sealing member, and can be connected with the liquid reservoir, the The injection button and the syringe move synchronously, wherein when the injection button is pressed, the liquid reservoir, the syringe and the first hollow piercing member are driven to move synchronously along the first direction so that the first A hollow piercing member passes through the seal to output fluid within the reservoir.

In some embodiments, the fluid infusion device may further include: an energy storage component operatively connected to the syringe, configured to store mechanical energy when the injection button is pressed and release the mechanical energy when the injection button is released. The mechanical energy thereby seals the first hollow piercing member within the seal.

In some embodiments, the fluid infusion device may further include: a second hollow piercing member operatively connected to the reservoir, capable of feeding fluid into the reservoir when in communication with the reservoir .

In some embodiments, the second hollow piercing member is also capable of retracting within the plunger when the injection button is depressed.

According to a third aspect of the embodiment of the present invention, there is provided a fluid infusion device for administering medicine to a patient, the device may include: a liquid reservoir for storing infusion fluid; an output valve connected with the an outlet of the reservoir is operatively connected; a flexible membrane overlies the reservoir; an injection button, positioned over the flexible membrane, has a filler that fills the reservoir and is configured to be depressed so that The filling member, together with the flexible membrane, fills the reservoir, forcing the fluid pressure in the reservoir to open the output valve, allowing the fluid in the reservoir to output.

In some embodiments, the fluid infusion set may further include: an input valve operatively connected to the inlet of the reservoir, a reset button operatively connected to the injection button and configured to be depressed to cause the Lifting of the filling member, together with the flexible membrane, from the reservoir causes the output valve to close and the input valve to open, allowing fluid to be supplied to the reservoir.

In some embodiments, the output valve may comprise a ball valve.

In some embodiments, the input valve may comprise a ball valve.

The fluid infusion device provided by the embodiment of the utility model is not only beneficial to reduce the overall size of the infusion device, but also makes the device as compact as possible, which is convenient for the user to wear in various scenarios, and is also conducive to the convenient and quick setting of the infusion device by the user. quantity.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a fluid infusion device for administering medicine to a patient according to a first embodiment of the present invention;

Fig. 2 is a three-dimensional structural schematic diagram of a fluid infusion device for administering medicine to a patient according to the first embodiment of the present utility model;

Fig. 3 is an enlarged partial cross-sectional schematic diagram according to the first embodiment of the present invention;

Fig. 4 is a free state schematic diagram of the fluid infusion device for administering drugs to patients according to the first embodiment of the present invention;

Fig. 5 is a schematic diagram of the working state of the fluid infusion device for administering drugs to patients according to the first embodiment of the present utility model;

Fig. 6a is a schematic structural view of a fluid infusion device for administering medicine to a patient according to a second embodiment of the present invention;

Fig. 6b is an enlarged schematic view of components according to the second embodiment of the present invention;

7 is a schematic cross-sectional view of a fluid infusion device for administering medicine to a patient according to a third embodiment of the present invention;

8a to 8e are schematic diagrams of the operating states of the fluid infusion device for administering drugs to patients according to the third embodiment of the present invention;

Fig. 9 is a schematic diagram of a fluid infusion device for administering medicine to a patient according to a fourth embodiment of the present invention;

Fig. 10a and Fig. 10b are schematic diagrams of the operating states of the fluid infusion device for administering medicine to patients according to the fourth embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the utility model is not limited to the construction and/or arrangement of the components shown in the accompanying drawings, and various combinations of the various embodiments of the utility model can also be carried out without departing from the essence of the utility model .

The embodiment of the present utility model provides a fluid infusion device for administering medicine to a patient, and the fluid infusion device may include a liquid reservoir, a plunger, an injection button and a displacement limiting mechanism. Wherein, the liquid reservoir may have a shape capable of storing infusion fluid, for example, a receiving structure having an upper surface, a lower surface and an outer surface. In some embodiments, the reservoir is cylindrical. The infusion fluid that can be stored in the liquid reservoir can be various liquids, gases, etc. used to administer medicines to patients. In some embodiments, the fluid may be a therapeutic liquid drug such as insulin. A plunger, located within the reservoir and confining the infusion fluid with the reservoir, is configured to enable movement along the reservoir to push fluid out of the reservoir or to draw fluid into the reservoir. In the case where the reservoir is cylindrical, the plunger is movable along the axial direction of the reservoir. The injection button, operatively moved in synchronism with the plunger, can be operated, for example, can be pressed or released by the user. A displacement limiting mechanism, disposed in parallel with the reservoir, may be configured to restrict the plunger from moving a predetermined distance within the reservoir when the injection button is operated (for example, when pressed or released), thereby moving the plunger within the reservoir to a predetermined distance. The predetermined distance corresponds to a predetermined amount of fluid output. For example, the displacement limiting mechanism can be arranged on the outside or inside of the outer surface of the liquid reservoir, and its geometric virtual centerline is parallel to the geometric virtual centerline of the liquid reservoir. Where the reservoir is cylindrical, the plunger within the reservoir moves along the axis of the reservoir, and the displacement limiting mechanism is preferably parallel to the axis of the reservoir. The displacement limiting mechanism is placed in parallel with the liquid reservoir, and the existing scheme of directly adjusting the infusion volume of the liquid reservoir through the screw (in this scheme, the screw as the displacement mechanism and the liquid reservoir are on the same line, greatly increases the size of the overall device), compared with the overall size of the fluid infusion device can be reduced, making the device more compact, convenient for users to wear and use in various scenes (such as outdoor scenes, etc.); moreover, the plunger is limited by the limiting mechanism The infusion volume is determined by the distance moved each time, without manually adjusting the screw rod, which simplifies the process of infusion volume adjustment.

[First Embodiment]

Fig. 1 is a schematic cross-sectional view of a fluid infusion device for administering medicine to a patient according to the first embodiment of the present invention; Fig. 2 is a schematic diagram of a fluid infusion device for administering medicine to a patient according to the first embodiment of the present invention Schematic diagram of the three-dimensional structure of the injection device; Fig. 3 is an enlarged partial cross-sectional schematic diagram according to the first embodiment of the utility model; Fig. 4 is a schematic diagram of a fluid infusion device for administering drugs to patients according to the first embodiment of the utility model Schematic diagram of a free state; FIG. 5 is a schematic diagram of a working state of the fluid infusion device for administering medicine to a patient according to the first embodiment of the present invention.

As shown in FIGS. 1 to 3 , the fluid infusion device 100 may include: a reservoir 101 , a plunger 102 , an injection button 103 , a base 104 , a drive button 105 , a rotary slider 106 , and a spring 107 . The reservoir 101 may be a bolus reservoir, storing the amount of fluid for one injection. Moreover, the reservoir (for example, a cylindrical reservoir) 101 can communicate with a hollow piercing member 1012 (for example, a hollow steel needle, etc.) via a one-way valve 1011, so that the plunger 102 can Open the check valve 1011 (for example, along the direction indicated by the arrow on the right side of the check valve 1011 in FIG. Output through component 1012, for example, is delivered to a patient. The liquid reservoir 101 can also communicate with the fluid supply chamber 1014 via the one-way valve 1013, and can apply a driving force to the fluid supply chamber 1014 (for example, apply a driving force along the direction of the arrow on the right side of the fluid supply chamber 1014 in FIG. 1 ), forcing The one-way valve 1013 is opened in the direction of the arrow on its upper side, thereby supplying fluid to the accumulator 101 .

As shown in Figures 1 and 2, the injection button 103, the base 104, the driving button 105, the rotating slider 106 and the spring 107 can be arranged in parallel with respect to the liquid reservoir 101, wherein the base 104, the driving button 105, the rotating slider Block 106 and spring 107 together may constitute a displacement limiting mechanism whose geometric centerline may be parallel to the direction of movement of plunger 102 within reservoir 101 . The displacement limiting mechanism can cooperate with the injection button 103 to limit the movement of the plunger 102 within the reservoir 101 to a predetermined distance. The injection button 103 is a linkage button that can act on the plunger 102 and the drive button 105 at the same time and has a cylindrical structure 1031. The axial direction (that is, the moving direction of the plunger 102) is parallel to the plunger 102 capable of moving in the axial direction of the reservoir 101, and is coaxially connected with the drive button 105 located below the injection button 103, that is, Pressing the injection button 103 causes the plunger 102 and drive button 105 to move side by side and synchronously. The rotary slider 106 may be coaxially disposed below the driving button 105 with the cylindrical structure 1031 of the injection button 103 as an axis. When the injection button 103 is pressed, the rotary slider 106 can move downward along the length direction of the cylindrical structure 1031 of the injection button 103 under the action of the driving button 105 . The spring 107 may be a telescoping spring, nestled on a cylindrical member 110 located on a base 109 (eg, a base with a circular surface) and coaxial with the cylindrical structure 1031 of the injection button 103 , with the top covering the spring cap 108 . The top surface of the spring cap 108 is in contact with the lower surface of the cylindrical structure 1031 of the injection button 103. When the injection button 103 is pressed, the spring 107 inside the spring cap 108 is forced downward, and the spring 107 is compressed to store mechanical energy. The base 104 can be similar to a cylindrical structure, which can wrap the driving button 105, the rotary slider 106, the spring 107 and the spring cap 108, and there are multiple (for example, more than 2) evenly distributed on the circumference of the cylindrical structure. The guide chute 1041 is connected between the guide chute 1041 at the end or the lower end (viewed from the direction facing Fig. 1), allowing the rotary slider 106 to slide from one guide chute into another adjacent guide chute . For example, the base 104 can be installed on the base 109 so that the linkage button 103 , the drive button 105 , the rotary slider 106 , the spring cap 108 , and the spring 107 are jointly accommodated in the space defined by the base 104 and the base 109 . In some other implementations, the base 104 and the base 109 may form an integral structure.

The driving button 105 can be operatively connected with the injection button 103 , and when the injection button 103 is pressed to move downward, the driving button 105 can also move downward together with the injection button 103 . The driving button 105 has a plurality of protrusions 1051 evenly distributed along the circumference, and each protrusion 1051 has a driving slope 1052, these protrusions 1051 correspond to the guide slots 1041 of the base 104, and can be inserted into the corresponding guide slots 1041.

The rotary slider 106 can be operatively engaged with the driving button 105, and has a plurality of protrusions 1061 uniformly distributed along the circumference, and these protrusions 1061 are matched with the positions of the protrusions 1051 of the driving button 105, and has a passive slope 1062 corresponding to the driving slope 1052 , which can be correspondingly inserted into the guide sliding groove 1041 of the base 104 . The convex portion 1051 and the convex portion 1061 of the drive button 105 and the rotary slider 106 can, as shown in FIG. Driven by the inclined surface 1052 , it slides along the guide chute 1041 .

The spring 107 can be in operative contact with the rotary slider 106. When the rotary slider 106 is pressed and moves downward along the guide chute, it stores mechanical energy as an energy storage component. When the rotary slider 106 turns into another guide chute, it will The stored mechanical energy is released, and a driving force (for example, the restoring force of a spring) is applied to the rotary slider 106 to return the rotary slider 106 to an unpressed state.

The convex portion 1051 of the driving button 105 and the convex portion 1061 of the rotary slider 106 are installed in the guide chute 1041 of the base 104 in a similar way as a spline, and are kept in a free state under the support of the spring 107, as shown in FIG. 4 . When the user presses the injection button 103, the passive slope 1062 of the convex portion 1061 of the rotary slider 106 moves down along the guide chute under the action of the driving slope 1052 of the drive button 105, and when it moves to the end of the guide chute, As shown in FIG. 5 , the convex portion 1061 of the rotary slider 106 breaks away from the guide chute and rotates to enter the adjacent guide chute. The spring 107 stores mechanical energy when the rotating slider 106 moves downward along the guide chute. When the rotary slider 106 turns into another guide chute, the spring 107 releases the stored mechanical energy and applies a driving force to the rotary slider 106, so that the rotary slider 106 and the driving button 105 return to the free state shown in FIG. 4 . Pressing the injection button 103 drives the drive button 105 and the rotary slider 106 to move downward along the guide chute, and the plunger 102 that moves synchronously with the injection button 103 also produces the same displacement. Since the lengths of the guide chute are equal, the column The plug 102 also moves a fixed distance at a time, pushing a fixed amount of fluid out of the reservoir 101 .

The embodiment of the utility model limits the movement of the plunger 102 to a fixed distance each time the injection button 103 is pressed through the cooperation of the base 104 arranged in parallel with the liquid reservoir, the drive button 105, the rotary slider 106 and the spring 107. The overall size of the device is greatly reduced, and the complicated injection volume setting process is avoided, which is very convenient for users to use.

[Second Embodiment]

Fig. 6a is a schematic structural view of a fluid infusion device for administering drugs to patients according to the second embodiment of the present invention; Fig. 6b is an enlarged schematic view of components according to the second embodiment of the present invention.

As shown in FIG. 6 a , the fluid infusion device 200 may include a liquid reservoir 201 , a plunger 202 , an injection button 203 , a fitting part 204 , and an elastic buckle 205 . Wherein, the plunger 202 can close one end of the cylindrical reservoir 201 and can move in the reservoir 201 along the axial direction of the reservoir. The injection button 203 is connected to the opposite end of the plunger 202 that contacts the inner cavity of the liquid reservoir 201 , and an elastic buckle 205 is provided at the connection between the injection button 203 and the plunger 202 . The matching portion 204 is arranged parallel to the extending direction of the liquid reservoir 201 and corresponds to the position of the elastic buckle 205 . The injection button 203 can drive the plunger 202 and the elastic buckle 205 to move synchronously. In some other embodiments, the plunger 202, the elastic buckle 205 and the injection button 203 can be formed into an integrated structure.

The matching part 204 is arranged in parallel with respect to the reservoir 201, and may be arranged above the reservoir 201 as shown in 6a, for example, may be sleeved on the outer surface of the reservoir 201, or may be formed with the reservoir 201 as One structure. The matching part 204 is provided with two openings 2041 and 2042 with a fixed distance apart, and the elastic buckle 205 can be fitted into the openings 2041 and 2042 .

When the injection button 203 is pressed, one end of the elastic buckle 205 pops out from the opening 2041 of the mating part 204, and moves a fixed distance to reach the position of the second opening 2042, and is assembled to the second opening 2042. At the same time, the plunger 202 Also correspondingly move the above-mentioned fixed distance, forcing the fluid in the liquid reservoir 201 to generate pressure thereby opening the output valve 2011 (for example, a one-way valve), pushing the fluid out of the liquid reservoir 201, and communicating the released fluid with the output valve 2011 The output conduit 2013 (for example, a hollow injection needle, etc.) is delivered to the patient, as shown by the arrow on the left in FIG. Wherein, the output valve 2011 may be a one-way valve arranged at the end of the reservoir 201 opposite to the plunger 202, as shown in FIG. 6b. The one-way valve structure can have two one-way channels, one can be used as an output valve, and the other can be used as an input valve. Such a structure can be beneficial to simplify the manufacturing process of the device. Since the distance that the elastic buckle 205 moves from the opening 2041 to the opening 2042 is fixed, the distance that the plunger 202 moves each time is also fixed, and the amount of fluid output is also determined, which avoids manual setting of the infusion volume each time, and simplifies The setting process of the infusion volume is simplified, which is convenient for users to use.

The fluid infusion device 200 may also include an energy storage component operatively connected to the elastic buckle 205, such as a telescopic spring or the like. The energy storage component can store mechanical energy when the elastic buckle 205 moves from the opening 2041 to the opening 2042 . The energy storage component, the matching portion 204 and the elastic buckle 205 together constitute a displacement limiting mechanism, and the displacement limiting mechanism cooperates with the injection button 203 to limit the movement of the plunger 202 within the liquid reservoir 201 by a predetermined distance.

The matching part 204 may further include a reset button 2043 , which cooperates with the opening 2042 . Pressing the reset button 2043 may cause the reset button 2043 to be inserted into the opening 2042 to force the elastic buckle 205 to pop out of the opening 2042 . The mechanical energy released by the energy storage component can drive the elastic buckle 205 to move from the opening 2042 to the opening 2041. At the same time, the liquid reservoir 201 can open the input valve 2012 (for example, a one-way valve with a structure as shown in FIG. 6b ), Fluid is drawn into the reservoir 201 via an input conduit 2014 (eg, a hollow needle, etc.) in communication with an input valve 2012 . As indicated by the arrow pointing to the right in FIG. 6a, the reservoir 201 transitions from a fluid-empty state to a fluid-filled state.

[Third Embodiment]

Fig. 7 is a schematic cross-sectional view of a fluid infusion device for administering medicine to a patient according to the third embodiment of the present invention; Figs. Schematic diagram of the operating state of the fluid infusion device.

As shown in FIG. 7 , the fluid infusion set 300 may include a reservoir 301 , an injection button 302 , a syringe 303 , a seal 304 , and a first hollow piercing member 305 . Wherein, the liquid reservoir 301 can store the fluid to be infused (for example, insulin, etc.), and one end of the injection button 302 can be operated with a plunger 311 (for example, a silicone piston, etc.) that can move axially in the liquid reservoir 301 For example, one end of the injection button 302 can be accommodated in the plunger 311 , and pressing the injection button 302 can push the plunger 311 to move in the liquid reservoir 301 . The liquid reservoir 301 can be entirely accommodated in the syringe 303 , for example, can be accommodated in a cylindrical recess in the center of the syringe 303 . The syringe 303 is movable and can move synchronously with the reservoir 301 . The seal 304 may be disposed on the exterior of the syringe 303 , for example, may be disposed on the exterior of the side of the syringe 303 close to the output channel 310 . The first hollow piercing member 305 can be arranged between the liquid reservoir 301 and the sealing member 304 , its base end can pass through the syringe 303 and communicate with the liquid reservoir 301 , and its front end is sealed in the sealing member 304 . When the injection button 302 is pressed, the first hollow piercing member 305 can move along with the movement of the liquid reservoir 301 and the syringe 303 .

The sealing member 304 can be a component with a sealing function such as a silicone plug, which can be arranged at a fixed position outside the syringe 303 and will not move with the movement of the syringe 303 . In the embodiment shown in FIG. 7 , the sealing member 304 is disposed under the movable syringe 303 , and can be fixed to a support member 306 supporting the syringe 303 , for example.

The first hollow piercing member 305 can be a steel needle with a hollow structure, the base end communicates with the liquid reservoir 301 (for example, can pierce the syringe 303 and insert it into the chamber of the liquid reservoir 301), and the front end pierces the outside of the syringe 303. part of the sealing member 304 and is sealed in the sealing member 304 , in this sealed state, the fluid in the reservoir 301 cannot flow out through the first hollow piercing member 305 . Under the condition that the front end of the first hollow piercing part 305 is sealed with the sealing member 304, the injection button 302 is pressed, and since the fluid in the liquid reservoir 301 is incompressible, the injection button 302 drives the plunger 311 together with the liquid reservoir 301 and the syringe 303 , the first hollow piercing member 305 moves downwards (viewed from the direction of FIG. The hollow piercing member 305 is output.

The fluid infusion set 300 may also include an energy storage component 307, such as a telescoping spring or the like. The energy storage component 307 can be operatively connected with the syringe 303, for example, can be arranged on the outer surface of the concave portion of the syringe 303 that accommodates the liquid reservoir 301, and can when the injection button 302 is pressed, along with the syringe 303 and the liquid reservoir 301 Moving downwards it is compressed, storing mechanical energy.

The fluid infusion device 300 may also include a second hollow piercing member 308, for example, a steel needle with a hollow structure or the like. The second hollow part 308 can be bendable, for example, can be bent 90 degrees, and is fixed on one side above the syringe 303 by a fixed stopper 309 arranged above the syringe 303 (viewed from the direction facing FIG. 7 ). The second hollow piercing member 308 may be in operative communication with the reservoir 301 , for example, may be received within the plunger 311 when the injection button 302 is pressed until the first hollow piercing member 305 penetrates the seal 304 , not in contact with the reservoir. The liquid container 301 is in fluid communication, thereby allowing the fluid to flow out only through the first hollow piercing member 305; when the injection button 302 is released, the energy storage member 307 releases mechanical energy to drive the syringe 303 and the liquid reservoir 301 and the first hollow piercing member 305 Moving upward together and retracting the first hollow piercing member 305 into the seal 304 is in fluid communication with the reservoir 301 allowing external fluid to flow into the reservoir 301 only via the second hollow piercing member 308 .

8a to 8e illustrate various operating states of the fluid infusion device 300 . As shown in Figure 8a, the fluid infusion device 300 is in a free state, the first hollow piercing member 304 is sealed in the sealing member 304, the front end of the second hollow piercing member 308 is located in the liquid reservoir 301, and the liquid reservoir 301 Filled with fluid, the fixed stopper 309 of the second hollow piercing member 308 is in contact with the upper surface of the syringe 303; next, an external force is applied to press down the injection button 302, and since the fluid in the liquid reservoir 301 is incompressible, the injection button 302 The plunger 311 drives the liquid reservoir 301, the syringe 303 containing the liquid reservoir 301, and the first hollow piercing member 305 inserted into the liquid reservoir 301 to move downward for a certain distance until the first hollow piercing member 305 penetrates the seal At the same time, the second hollow piercing member 308 shrinks in the plunger 311, so that the liquid reservoir 301 is in fluid communication with the external fluid output pipe 310, and the syringe 303 will not continue to move downward, as shown in FIG. 8b. Continue to press the injection button 302 downward, the plunger 311 continues to move downward in the liquid reservoir 301, and all the fluid in the liquid reservoir 301 is output to the output pipeline 310 through the first hollow piercing member 305, as shown in Figure 8c, The fluid in the reservoir 301 is infused. The energy storage component 307 stores mechanical energy during the downward movement of the plunger 311 by pressing the injection button 302 . After the fluid in the reservoir 301 is infused, the injection button 302 is released, and the energy storage component 307 will release the stored mechanical energy, driving the syringe 303, the fluid reservoir 301 and the first hollow piercing component 305 to move upward together, as shown in Figure 8d As shown, the first hollow piercing member 305 moves upwards into the sealing member 304, and is sealed in the sealing member 304, and the second hollow piercing member 308 contracted in the plunger 311 will move from the plunger 311 as the plunger 311 moves upward. 311 is exposed, so that the liquid reservoir 301 is in fluid communication with the second hollow piercing member 308, allowing external fluid to flow into the liquid reservoir 301, while the upper surface of the movable syringe 303 is in contact with the fixed stopper of the second hollow piercing member 308 309 is in contact, preventing the syringe 303 from continuing to move upwards. The mechanical energy released by the energy storage component 307 drives the plunger 311 to continue to move upwards, allowing the fluid to continuously flow into the reservoir 301 through the second hollow piercing component 308 and filling the reservoir 301 with fluid.

The fluid infusion device 300 according to the embodiment of the present invention can be manufactured as a wearable device, for example, it can be adhered to the patient's skin in a direction parallel to the length direction of the liquid reservoir 301 .

In the embodiment of the present utility model, through the cooperation of injection button 302, syringe 303, seal 304, first hollow piercing part 305, second hollow piercing part 308, energy storage part 307 and other components, the plunger can be injected and filled. The moving distance in the process of fluid is fixed, and a fixed amount of fluid output can be realized by pressing the injection button once, which saves the complicated setting process of infusion volume and is convenient for users to use.

[Fourth Embodiment]

Fig. 9 is a schematic diagram of a fluid infusion device for administering medicine to a patient according to the fourth embodiment of the present invention; Schematic diagram of the operational states of the fluid infusion device.

As shown in FIGS. 9 , 10a and 10b , fluid infusion set 400 may include reservoir 401 , output valve 402 , flexible membrane 403 , injection button 404 , input valve 405 , reset button 406 and base 407 . Wherein, the reset button 406 and the injection button 404 can be installed on the base 407 , for example, a shell-shaped base with a storage space. Moreover, the liquid reservoir 401 , the output valve 402 and the input valve 405 can be accommodated in the accommodation space of the base 407 , as shown in FIG. 9 . The opening of the reservoir 401 may be flush with the outer surface of the base 407 on which the flexible membrane 403 covers, thereby isolating the reservoir 401 from the outside world. Wherein, the reset button 406 can be installed in the installation hole 4071 on one side of the base 407, and is completely stored in the installation hole 4071 of the base 407 when it is not in contact with the injection button 404. The surface is flush; the injection button 404 can be installed on the position parallel to the reset button 406 of the base 407. When the injection button 404 is pressed, its embedded part 4042 can be embedded in the mounting hole 4071 of the base 407, so that the reset button 406 A part of it protrudes out of a part of the mounting hole 4071. The reservoir 401 can be used to store the fluid for infusion, for example, it can be a bowl-shaped container as shown in Fig. 10a and Fig. A valve 405 (eg, ball valve, etc.) is operatively connected. For example, the output valve 402 can be arranged directly under the liquid reservoir 401, and the fluid in the liquid reservoir 401 can flow to the injection syringe and the like through the output valve 402. The input valve 405 can be arranged at a position parallel to the output valve 402 below the liquid reservoir, and a fluid pipeline can be set to communicate the outlet of the input valve 405 with the bowl-shaped liquid reservoir 401, so that the external fluid can flow to the storage tank through the input valve 405. Liquid container 401. The liquid reservoir 401 can be disposed under the injection button 404 , specifically, can be disposed under the filler 4041 of the injection button 404 . A flexible film 403 is also provided between the liquid reservoir 401 and the filler 4041. Specifically, as shown in FIG. 9 and FIG. 10a and FIG. One surface of the membrane 403 is in contact with the reservoir 401 and the other surface can be in contact with the filler 4041 . The flexible membrane 403 can be a relatively thin membrane with elasticity, which can be used to enhance sealing when filling, for example, a silicone membrane, etc., so as to isolate the fluid in the reservoir 401 from the outside.

An injection button 404 may be provided over the flexible membrane 403 with a filler 4041 that fills the reservoir 401 . In the embodiment shown in FIG. 9 , the filler 4041 is a bowl-like filler capable of filling up the bowl-shaped reservoir 401 . In some other implementation manners, the filler 4041 may also be in other shapes matching the external dimensions of the liquid reservoir 401 , for example, cylindrical. Viewed from the direction facing Fig. 10a, a downward force is applied to the injection button 404, and the injection button 404 drives the filler 4041 to move downward together with the flexible membrane to press into the reservoir 401, so that the space of the reservoir 401 is filled with the filler 4041 is filled, forcing the fluid in the reservoir 401 to generate pressure so as to open the output valve 402 to allow the fluid in the reservoir 401 to output.

Injection button 404 may be operatively connected with reset button 406 . For example, the injection button 404 can have an embedded part 4042, which can be embedded in the mounting hole 4071 of the reset button 406 on the base 407, and when the injection button 404 moves downward (for example, in the direction of the arrow shown above the injection button 404 in FIG. force makes the injection button 404 move down) and is full of the liquid reservoir 401, the embedded part 4042 can be inserted into the installation hole 4071 of the reset button 406 in the base 407, and a part of the reset button 406 is moved along the right side of the reset button 406 in Fig. 10a. The direction of the arrow pushes out the outer surface of the base 407 .

As shown in Figure 10b, apply an external force along the direction of the arrow on the right side of the reset button 406 to press the reset button 406, so that the pushed out part of the reset button 406 is retracted to the surface of the base 407, and at the same time, the embedded part 4042 of the injection button 404 is pushed out of the installation hole 4071, moving upwards along the direction of the arrow above the injection button 404 in Figure 10b, driving the filler 4041 together with the flexible membrane 403 to be lifted from the reservoir 401, and the negative pressure formed in the reservoir 401 can promote contact with the reservoir 401 The connected output valve 402 is closed, and the input valve 405 is opened to allow fluid to flow into the liquid storage 401 to realize filling the liquid storage 401 with fluid.

The embodiment of the utility model can output a fixed amount of fluid in the liquid reservoir 401 every time the injection button 404 is pressed through the cooperation of multiple components such as the injection button 404, the flexible membrane 403, and the output valve 402, avoiding complicated infusion The volume setting procedure simplifies the infusion volume setting process and is very user-friendly.

It should be noted that although aspects of the above-mentioned devices are described in a specific sequence and specific structural arrangement, this is only for illustration and does not constitute a limitation to the utility model, and the claimed subject matter is not limited to the described sequence and structure. It should be understood by those skilled in the art that various modifications can be made to the invention and equivalent replacements can be made without departing from the essence of the utility model. Therefore, the subject matter claimed in the utility model is not limited to the specific implementation manners disclosed above, but may also include all technical solutions falling within the protection scope of the claims and technical solutions equivalent thereto. Furthermore, in the claims, unless otherwise stated, all terms are to be interpreted in their broadest reasonable meaning.

Claims (15)

1. the fluid infusion apparatus for carrying out administration to patient, is characterized in that, comprising:

Reservoir, for storing infused fluid;

Plunger, be positioned at described reservoir inside and limit infused fluid together with described reservoir, this plunger is configured to move along described reservoir;

Injection button, is operatively synchronized with the movement with described plunger, is configured to be operated;

Offset qualification mechanism, arranges with described reservoir is parallel, is configured to be limited described plunger mobile preset distance in described reservoir when described injection button operates, thus is exported by the fluid of predetermined quantity in described reservoir.

2. device according to claim 1, is characterized in that, described offset qualification mechanism comprises:

Pedestal, has multiple guide chutes that length is equal,

Sliding part, be connected with described injection button operability, be configured to be pushed when described injection button is pressed slide along the first guide chute in described multiple guide chute and depart from described first guide chute when described injection button is released and proceed to the second guide chute adjacent in described multiple guide chute.

3. device according to claim 2, is characterized in that, described offset qualification mechanism also comprises:

Energy storage component, be connected with described sliding part operability, be configured to the store mechanical energy when described sliding part slides along described first guide chute and discharge described mechanical energy when described sliding part proceeds to described second guide chute return to make described sliding part the state be not pushed.

4. device according to claim 3, is characterized in that, described sliding part comprises:

Activation button, is connected with described injection button operability, have circumferentially equally distributed multiple first protuberance that can embed described guide chute, and described first protuberance has driving inclined-plane,

Rotary slider, engages with described activation button and described energy storage component operability, have circumferentially equally distributed multiple second protuberance that can embed described guide chute, and described second protuberance has the passive inclined-plane corresponding with described driving inclined-plane.

5. device according to claim 1, is characterized in that, described offset qualification mechanism comprises:

Auxiliary section, has the first opening and second opening of fixed distance,

Elastic buckle, synchronously moves with described injection button and described plunger, is configured to eject from described first opening when described injection button is pressed and move described fixed range to be assembled to described second opening.

6. device according to claim 5, is characterized in that, described auxiliary section also comprises:

SR, coordinates with described second opening, is configured to be pressed to make described Elastic buckle eject described second opening.

7. device according to claim 6, is characterized in that, described offset qualification mechanism also comprises:

Energy storage component, be connected with described Elastic buckle operability, be configured to the store mechanical energy when described Elastic buckle moves to described second opening from described first opening and discharge described mechanical energy to make described Elastic buckle move described fixed range thus to be assembled to described first opening when described Elastic buckle ejects from described second opening.

8. the fluid infusion apparatus for carrying out administration to patient, is characterized in that, comprising:

Reservoir, for storing the fluid treating infusion;

Injection button, is connected with the plunger operability of moving along described reservoir, is configured to be operated;

Syringe, for receiving described reservoir, and synchronously can move with described reservoir,

Sealing member, is arranged at the outside of described syringe,

First hollow penetrating member, the cardinal extremity of described first hollow penetrating member is communicated with described reservoir, and forward end seal, in described sealing member, synchronously can be moved with described reservoir, described injection button, described syringe,

Wherein, drive described reservoir, described syringe and described first hollow penetrating member synchronously mobile to make described first hollow penetrating member run through described sealing member by the fluid output in described reservoir when described injection button is pressed.

9. device according to claim 8, is characterized in that, also comprises:

Energy storage component, is connected with described injector operations, is configured to the store mechanical energy when described injection button is pressed and discharges described mechanical energy when described injection button is released thus described first hollow penetrating member is sealed in described sealing member.

10. device according to claim 9, is characterized in that, also comprises:

Second hollow penetrating member, is communicated with described reservoir operability, can when being communicated with described reservoir to described reservoir input fluid.

11. devices according to claim 10, is characterized in that, described second hollow penetrating member can also shrink in described plunger when described injection button is pressed.

12. 1 kinds for the fluid infusion apparatus of carrying out administration to patient, is characterized in that, comprising:

Reservoir, for storing infused fluid;

Output valve, is connected with the export operation of described reservoir;

Flexible membrane, covers on described reservoir;

Injection button, be positioned on described flexible membrane, there is the filling member being full of described reservoir, be configured to be pressed to make described filling member be full of described reservoir together with described flexible membrane, force described reservoir fluid pressure to be opened by described output valve, allow the fluid in described reservoir to export.

13. devices according to claim 12, is characterized in that, also comprise:

Input valve, is connected with the entry operation of described reservoir,

SR, is connected with described injection button operability, is configured to be pressed described filling member is lifted from described reservoir together with described flexible membrane, impels described output valve to close and described input valve open, thus to described reservoir input fluid.

14. devices according to claim 12 or 13, it is characterized in that, described output valve comprises ball valve.

15. devices according to claim 13, is characterized in that, described input valve comprises ball valve.