CN115607775A

CN115607775A - Auxiliary device for an injector and injection system

Info

Publication number: CN115607775A
Application number: CN202211293573.9A
Authority: CN
Inventors: 张宇新; 陈苏宁
Original assignee: Beijing Qs Medical Technology Co ltd
Current assignee: Beijing Qs Medical Technology Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-17

Abstract

The invention provides an auxiliary device and an injection system for an injector, wherein the injector comprises an injector front end part and an injector rear end part, and the injector rear end part can rotate relative to the injector front end part along a first direction to perform medicine suction operation and rotate along a second direction opposite to the first direction to perform medicine discharge operation so as to obtain the expected medicine quantity. The auxiliary device comprises a rear sleeve, a sensing device and a control device. The rear sleeve is sleeved on the injector from the rear end part of the injector and can move together with the rear end part of the injector. Sensing means are provided in the rear end sleeve, the sensing means being capable of emitting different signal information when the rear end portion of the syringe is rotated in the first direction and the second direction, respectively. The control device is in communication with the sensing device and is configured to control the actual amount of medicament in the syringe based on the signal information in order to achieve the desired amount of medicament. Therefore, the auxiliary device can correctly identify the rotation direction of the rear end part of the injector, and further can accurately control the actual medicine quantity.

Description

Auxiliary device for an injector and injection system

Technical Field

The invention relates to the technical field of injection, in particular to an auxiliary device for an injector and an injection system comprising the auxiliary device. In particular, the injector is a needleless injector.

Background

Many diseases require the regular and quantitative injection of therapeutic agents, which are generally injected by means of syringes. The conventional syringe has a needle through which a liquid medicine is injected, but the presence of the needle causes pain such as stabbing pain to a patient. In recent years, the occurrence of needleless injectors relieves the pain of patients when using a syringe with a needle to inject medicines. Whether a needle or a needleless injector, it is important for a patient who needs to be injected with the injector for a long time to effectively manage and control the administration of the therapeutic agent, such as strictly controlling the injection dose, the injection time, and the like.

However, the existing syringes generally have only a drug injection function and a simple drug dose display function, and therefore, when a user injects a drug using a common needle or needle-free syringe, the user needs to manually record the injection dose and injection time of each injection, and effective drug administration management cannot be achieved.

Therefore, there is a pressing need for a device that can be used in conjunction with an injector to effect administration management of a medication.

Disclosure of Invention

The invention provides an auxiliary device for a rotary medicine suction type injector and an injection system comprising the auxiliary device.

According to a preferred embodiment of the present invention, there is provided an accessory device for a syringe, the syringe comprising: a front injector part and a rear injector part, and an injection button positioned at the rear end of the rear injector part, the rear injector part can rotate relative to the front injector part along a first direction to perform medicine suction operation and along a second direction opposite to the first direction to perform medicine discharge operation so as to obtain the expected medicine quantity,

wherein the auxiliary device comprises:

the rear sleeve is sleeved on the injector from the rear end part of the injector and can move together with the rear end part of the injector;

a sensing device disposed in the rear end sleeve, the sensing device configured to be capable of emitting different signal information when the syringe rear end portion is rotated in a first direction and a second direction, respectively;

a control device in communication with the sensing device, the control device configured to control an actual amount of drug in the syringe to achieve a desired amount of drug based on the signal information.

In a preferred embodiment, the sensing device comprises a plurality of first sensors disposed on the rear sleeve, the plurality of first sensors being spaced apart along a circumference of the rear sleeve, and a plurality of second sensors disposed at the front end portion of the syringe, the first sensors being configured to emit a sensing signal when they are in proximity to the second sensors.

In a preferred embodiment, the signal information is a sequence of a plurality of signal groups, and the signal groups are combinations of sensing signals sensed by the plurality of first sensors when rotating to a predetermined position in a predetermined order.

In a preferred embodiment, the syringe is configured to aspirate or discharge a medical fluid of N dose units and to generate a plurality of signal groups when the rear portion of the syringe is rotated by one revolution relative to the front portion of the syringe, where N is greater than 0 and the number of the plurality of signal groups is associated with a value of N, the control device includes a dose calculation unit configured to determine a rotation direction of the rear portion of the syringe based on the signal information and configured to calculate an actual amount of the drug based on the rotation direction and the number of the plurality of signal groups.

In a preferred embodiment, the plurality of second inductors are spaced apart from each other by an angle that is an integer multiple of the angle of spacing between the plurality of first inductors, and/or the number of first inductors and second inductors is associated with the value of N.

In a preferred embodiment, the number of the plurality of signal groups is greater than or equal to the number of the dosage units when N.gtoreq.3, and the number of the plurality of signal groups is greater than or equal to 3 when 0 < N < 3.

In a preferred embodiment, the auxiliary device further comprises a front sleeve fitted over the front portion of the syringe and movable together with the front portion of the syringe, the second inductor being disposed in the front sleeve.

In a preferred embodiment, the second inductor is disposed in the front portion of the syringe.

In a preferred embodiment, the rear sleeve is connected to the rear part of the syringe in a hinged or snap connection.

In a preferred embodiment, the supplemental device further comprises an injection control assembly disposed at a rear end of the rear sleeve and engageable with the injection button to control injection, the rear end wall of the rear sleeve having an aperture therein, the injection control assembly being disposed in the aperture.

In a preferred embodiment, the injection control assembly comprises:

an additional injection button disposed in an opening in the rear end of the rear end sleeve and cooperating with the injection button for simultaneous action.

In a preferred embodiment, the bore has a circumferentially formed recess in the bore wall such that the front and rear of the bore have radially inwardly projecting front and rear projections respectively, the injection control assembly comprising a return spring which is sleeved over the additional injection button and which is disposed in the recess.

In a preferred embodiment, the additional injection button comprises a hollow body and a flange at the front of the body, the additional injection button being dimensioned such that the flange can be received within the recess and the body of the additional injection button can be moved longitudinally through the aperture defined by the rear projection.

In a preferred embodiment, the auxiliary device further comprises:

an intelligent component switch disposed near the additional injection button, the injection button bouncing up when the pressurizing operation is completed causing the additional injection button to bounce and touching the intelligent component switch to turn on, the intelligent component switch automatically turning off when the additional injection button is pressed, wherein the dose calculation unit starts calculating the actual dose in response to the turn on of the intelligent component switch.

In a preferred embodiment, the dose calculation unit is configured to:

determining the metering zero point of the actual dosage when the intelligent component switch is switched on,

calculating the actual dosage of the injector according to the metering zero point, the signal information and the number of the signal groups, and

recording an injection time when the smart component switch is off.

In a preferred embodiment, the rear sleeve is further provided with a display for displaying the actual amount of medicament and the time of injection.

In a preferred embodiment, the front end sleeve is connected to the syringe front end portion in a hinged or snap connection.

In a preferred embodiment, the auxiliary device further comprises a wireless module for transmitting data to a network and/or a data terminal.

In a preferred embodiment, the wireless module comprises a WIFI module and/or a bluetooth module, and the data terminal device comprises a computer and/or a smart mobile device.

In a preferred embodiment, the data comprises one or more of injection time, injection interval time, number of injections, inhalation dose, expelled dose, actual dose.

In a preferred embodiment, the first sensor is a hall element, the second sensor is a magnet, or the first sensor and the second sensor are optical sensors.

The invention also provides an injection system comprising a syringe and an accessory device as described in any of the above, the accessory device being nested in the syringe from a rear end portion of the syringe.

In a preferred embodiment, the sensing means comprises a plurality of first sensors disposed on the rear sleeve at circumferentially spaced intervals along the rear sleeve, the injection system further comprising a plurality of second sensors disposed at the front syringe portion, the first sensors being configured to emit a sensing signal when proximate the second sensors.

In a preferred embodiment, the syringe is configured to aspirate or expel N dosage units of medical fluid when the rear portion of the syringe is rotated one revolution relative to the front portion of the syringe, where N is greater than 0 and the number of the first and second plurality of sensors is related to the value of N.

In a preferred embodiment, the injector is configured to generate a plurality of signal groups when the injector back end portion rotates one revolution relative to the injector front end portion, the plurality of signal groups being greater than or equal to the number of dosage units when N ≧ 3, and the plurality of signal groups being greater than or equal to 3 when 0 < N < 3.

In a preferred embodiment, the plurality of second inductors are spaced apart from each other by an angle that is an integer multiple of the angle at which the plurality of first inductors are spaced apart from each other.

In a preferred embodiment, the auxiliary device further comprises a front sleeve disposed on the front end portion of the injector and capable of moving together with the front end portion of the injector, and the second inductor is disposed in the front sleeve.

In a preferred embodiment, the second inductor is disposed in the injector nose section.

In a preferred embodiment, the injector is a needleless injector.

Drawings

Figure 1 schematically illustrates a prior art rotary drug-aspirating syringe.

Fig. 2A-2D schematically illustrate various states of the rotary drug-aspirating syringe of fig. 1, respectively, during use.

Fig. 3A-3D each schematically illustrate an injection system with an auxiliary device mounted thereon according to a preferred embodiment of the present invention, wherein the auxiliary device is shown in various states mounted in place on a rotary drug-aspirating injector.

Fig. 4 is a cross-sectional view of the supplemental device shown in fig. 3A-3D.

Fig. 5 is an exploded perspective view of the auxiliary device shown in fig. 4.

Fig. 6 exemplarily shows an injection system with an auxiliary device mounted thereon according to another preferred embodiment of the present invention.

Fig. 7-9 illustratively show graphs of signal information generated when the rear end portion of the injector has three dose units, four dose units, and two dose units, respectively, for one rotation.

Detailed Description

Hereinafter, the auxiliary device for use with a rotary medicine suction type injector and the injection system including the same of the present invention will be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of practicing the invention will occur to those skilled in the art and are within the scope of the invention.

Directional terms appearing in the following detailed description, such as "front", "rear", etc., are relative to the syringe. Specifically, "front" refers to the side of the syringe barrel of the injector, and "rear" refers to the side of the injection button opposite the side of the syringe barrel.

The auxiliary device of the present invention for use with a rotary drug-absorbing syringe is applicable to both needle-and needle-free syringes, as long as the syringe is of the type commonly used for rotary drug-absorbing syringes. Hereinafter, for convenience of description, the present invention will be described by taking a rotary drug-sucking needleless injector as an example.

Fig. 1 shows a prior art rotary drug-sucking injector which is a needleless injector. Which was previously developed by the applicant and is the general structure of most needleless injectors currently on the market. The injector generally comprises two parts which can rotate relatively and move longitudinally relatively, and the pressurizing, medicine sucking and injecting functions of the injector are realized through the relative movement between the two parts.

As shown in fig. 1, the injector generally includes an injector front end part 1, an injector rear end part 2, a medicine injection tube 3 located at the front end of the injector front end part 1, and an injection button 4 located at the rear end of the injector rear end part 2. Aspiration or expulsion of the drug can be effected by rotating the rear syringe part 2 relative to the front syringe part 1, as will be described in more detail below. Wherein the amount of the inhaled and expelled medicament is related to the amount of rotation of the rear portion 2 of the syringe. In a preferred embodiment, the syringe is configured to aspirate or discharge N dosage units of medical fluid when the rear portion 2 of the syringe is rotated one revolution relative to the front portion of the syringe. The 1 dosage unit may be the smallest dosage unit of the medical fluid to be injected. Preferably, N is an integer greater than or equal to 1. Illustratively, N may be 1, 2, 3, 4, 5, 6, 7, 8, and so forth. For example, when N is 3, when the syringe rear end portion 2 is rotated by one revolution relative to the syringe front end portion to suck or discharge 3 dose units of medical fluid, 1 dose unit of medical fluid is sucked or discharged per 120 degrees of rotation of the syringe rear end portion 2. For another example, when N is 4, when 4 dosage units of the liquid medicine are sucked or discharged while the rear syringe part 2 is rotated by one rotation with respect to the front syringe part, 1 dosage unit of the liquid medicine is sucked or discharged every 90 degrees of the rear syringe part 2.

Preferably, the injector nose part 1 is also provided with a dose display window 5. When the rear end part 2 of the injector is rotated to suck or discharge medicine, integer numbers corresponding to different doses are sequentially displayed in the display window 5, and in order to more accurately control the medicine sucking dose, through the design of the internal structure of the injector, in the process that the rear end part 2 of the injector rotates relative to the front end part 1 of the injector, obvious pause feeling can be realized at each dose unit value, namely, the injector can vibrate or pause the hand of a user when different numbers are displayed in the display window 5, so that the user can not excessively rotate (suck medicine) once, and simultaneously, the change of the medicine sucking dose can be more intuitively sensed.

Fig. 2A-2D show various states of the injector of fig. 1, respectively, during use. Figure 2A shows the initial state of the injector prior to use, when it is desired to use the injector, the user may rotate the rear injector section 2 in one direction (e.g. clockwise) and the rear injector section 2 approaches the front injector section 1 along its longitudinal axis while rotating relative to the front injector section 1, using the helical compression mechanism inside the injector to compress the spring to accumulate energy for injection, until the injector reaches the pressurised complete state shown in figure 2B, at which time the injection button 4 will spring up. As shown in fig. 2C, after pressurizing the syringe, the user may put the syringe barrel 3 into the medical fluid container, rotate the syringe rear end portion 2 in a first direction (e.g., counterclockwise) to move the syringe rear end portion 2 away from the syringe front end portion 1 along the longitudinal axis, and suck the medical fluid into the syringe barrel 3, during the process of sucking the medical fluid, the medical fluid may absorb an excessive amount of medical fluid, and if the excessive amount of medical fluid needs to be discharged, rotate the syringe rear end portion 2 in a second direction to perform a liquid discharge operation, and the user may repeat the above operations until the amount of the medicine sucked by the syringe reaches a desired amount. In performing an injection operation, the user may press the injection button 4, releasing the injection pressure accumulated during pressurization to complete the injection, as shown in fig. 2D.

In order to facilitate the management of the use of the syringe, the invention provides an auxiliary device which is independent of the syringe, can be installed and fixed on the syringe and is matched with the syringe for use. As mentioned, the aid can also be used for rotary drug-aspirating needle syringes. For example, a needle may be provided at the end of the cartridge 3 shown in fig. 1.

According to the present invention, the supplemental device 100 includes an injection control assembly capable of controlling the injection of a rotary drug-aspirating injector, a sensing device capable of sensing the relative movement of various parts of the injector, and a control device capable of calculating the drug-aspirating dose and recording the time of injection. The control device of the present invention may be a microcontroller, a microcontrol unit or a single-chip microcomputer in the general sense well known to those skilled in the art, which may be general or customized for a particular use, and which may be programmed to perform operations and logic decisions according to program instructions.

Fig. 3A-3D schematically illustrate the supplemental device 100 according to the present invention mounted in place on the rotary drug-aspirating syringe shown in fig. 1-2D. Specifically, the auxiliary device 100 may include a front sleeve 110 covering the injector from the injector front end part 1 and a rear sleeve 120 covering the injector from the injector rear end part 2 and covering part of the front sleeve 110, the front sleeve 110 being provided with a sensing device capable of sensing relative movement of each part of the injector, the rear sleeve 120 being provided with an injection control assembly capable of controlling injection of the rotary drug-sucking injector, a sensing device capable of sensing relative movement of each part of the injector, and a control device capable of calculating a drug-sucking dose and recording injection time. As further shown in fig. 4, the front side (left side in the figure) and the back side (right side in the figure) of the front end sleeve 110 are both open ends, and as shown in the figure, the front end sleeve 110 is assembled to the front end part 1 of the rotary drug-sucking syringe during use, e.g. by means of a tight fit, a hinge, a snap connection. In particular, the front end sleeve 110 is at the front end portion of the syringe and moves therewith. The front side (left side in the figure) of the rear sleeve 120 is an open end for receiving and holding the syringe rear part 2. The rear side of the rear sleeve 120 is a closed end with an opening 121, said opening 121 being used for arranging an injection control assembly. As shown, during use, the rear end sleeve 120 is assembled to the syringe rear end portion 2 of the rotary drug-aspirating syringe, for example by means of a tight fit, a hinge, a snap-fit connection, etc. In particular, the rear sleeve 120 is fitted over the rear injector part 2 and is able to move therewith. When the user performs various operations using the syringe, or only the auxiliary device needs to be operated. For example, in pressurizing the syringe, the user simply rotates the rear end sleeve 120 with respect to the front end portion 1 of the syringe. A power source (for clarity, the power source is not shown in the drawings) is also provided in the rear sleeve 120 for powering the sensing and control devices, and the power source in the present invention may be a replaceable disposable battery or a recyclable rechargeable battery. Of course, the invention is not limited thereto, the sensing means and the control means may also be connected to a power line for power supply by an external power supply.

According to a preferred embodiment of the present invention, as shown in fig. 4, a rear end opening hole 121 of the rear end sleeve 120 is formed on a rear end wall of the rear end sleeve 120 and includes a groove 122 formed on a hole wall, and a front side protrusion 123 and a rear side protrusion 124 which are radially inwardly protruded are formed at front and rear portions of the rear end opening hole 121, respectively, due to the formation of the groove 122. The injection control assembly includes an additional injection button assembly disposed at the rear end opening 121 of the rear end sleeve 130. The additional injection button assembly includes an additional injection button 150 disposed at least partially within the opening 121 and a return spring 140 that fits over the additional injection button 150 and is disposed within the recess 122 of the rear opening 121. More specifically, as shown in fig. 3A-3C, the additional injection button 150 includes a hollow body 151 and a flange 152 at the front of the body. The dimensions of the additional injection button 150 and the rear end opening 121 cooperate such that the flange 152 of the additional injection button 150 is sized to be received within the recess 122 but is larger than the apertures defined by the front and

rear projections

123, 124, while the body 151 of the additional injection button 150 is free to move through the apertures defined by the rear projection 124 over a certain longitudinal range. The return spring 140 is fitted over the additional injection button 150 with the front end of the return spring 140 abutting against the rear wall of the flange 152 and the rear end abutting against the front wall of the rear boss 124.

In use, the rear sleeve 120 is fitted over the rear portion 2 of the injector and the injection button 4 at the rear end of the rear portion 2 of the injector is located at the front end of the hollow body 151 of the additional injection button 150 and is in close proximity thereto, thereby enabling the simultaneous action of the actions of the additional injection button 150 and the injection button 4. More specifically, in the initial state, the return spring 140 maintains the additional injection button 150 in a non-sprung state. When the injector is completely pressurized, the injection button 4 of the injector will spring up and cause the additional injection button 150 to spring up against the force of the return spring 140.

As shown in fig. 5, in a preferred embodiment, the sensing device 101 comprises a plurality of first inductors 121 disposed at the front end of the rear sleeve 120, the first inductors being spaced apart along the circumference of the rear sleeve, and a plurality of second inductors 111 disposed at the front sleeve 110, the second inductors being spaced apart along the circumference of the front sleeve. When the rear sleeve 120 rotates with the injector rear part 2, the plurality of first inductors 121 approach the second inductor 111 or move away from the second inductor 111, respectively, as they rotate. The first sensor 121 can send a sensing signal (e.g., a signal value of 1) to the control device when it is close to the second sensor 111, and does not send a sensing signal (e.g., a signal value of 0) when there is no second sensor 111 nearby. In the present embodiment, a group of signals is defined as a combination of sensing signals sensed by the plurality of first sensors 121 when they rotate to a predetermined position in a predetermined order. The injector is configured to generate a plurality of signal groups when the injector back end part 2 rotates one revolution relative to the injector front end part 1, and a sequence formed by the plurality of signal groups is defined as signal information.

The sensing means 101 is capable of emitting different signal information when the syringe rear end section 2 is rotated in the first direction and the second direction, respectively. The control means communicates with the sensing means 101 and is able to determine the direction of rotation of the rear portion 2 of the syringe based on the received signal information and thereby determine whether the syringe is performing a sucking operation or a discharging operation.

In a preferred embodiment, the number of sets of signals generated when the rear part 2 of the injector is rotated one revolution is associated with the number N of dosage units. The control device comprises a dose calculation unit configured to be able to calculate an actual amount of drug, i.e. an actual amount of inhaled drug, based on the rotational direction of the rear part 2 of the syringe and the number of received signal sets. For example, the dose calculation unit may accumulate or reduce the actual inhalation dose by one dose unit when the signal group is changed once, or by one dose unit when the signal group is changed three times.

In the above embodiment, the second inductor 111 is provided in the front end sleeve of the auxiliary device. In other embodiments, as shown in fig. 6, the second sensor 111 may be directly provided in the front end portion 1 of the injector, that is, in the present embodiment, the auxiliary device does not include a front end sleeve, and the auxiliary device needs to be used with the injector having the second sensor built therein.

In a preferred embodiment, the first inductor 121 is a hall element and the second inductor 111 is a magnet. In other embodiments, the first sensor 121 and the second sensor 111 may be light sensors.

The number of first and second sensors 121,111 is related to the value N of the dosage unit of one revolution of the rear portion 2 of the syringe. The larger the value of N, the larger the number of the first and

second inductors

121 and 111. The greater the number of first inductors 121 and second inductors 111, the more different kinds of signal information can be provided. The number of the first inductors 121 is at least 2, and the number of the second inductors 111 is at least 2. The combination of at least 2 first sensors 121 (e.g., a, B) and at least 2 second sensors 111 can generate 3 different signal sets (a =1, B =0 and a =0, B =1 and a =1, B =1,1 representing that the second sensor 111 is sensed and no second sensor 111 is sensed) when the rear portion 2 of the syringe rotates one revolution, and the rotation direction (the first direction or the second direction) of the rear portion 2 of the syringe relative to the front portion 1 can be determined only when 3 different signal sets are generated, and the rotation direction determines the sucking or discharging of the medical fluid by the syringe, as shown in fig. 7 and described in detail below.

In a preferred embodiment, the angle of interval between the plurality of second inductors 111 is an integer multiple of the angle of interval between the plurality of first inductors 121, for example, the angle of interval between the plurality of second inductors 111 may be the same as the angle of interval between the plurality of first inductors 121, or the angle of interval between the plurality of second inductors 111 may be 2 times the angle of interval between the plurality of first inductors 121.

In a preferred embodiment, when N ≧ 3, the number of the plurality of signal groups is greater than or equal to the number of dosage units, for example, when the rear portion 2 of the syringe rotates one revolution relative to the front portion of the syringe to aspirate or discharge 4 dosage units of medical fluid, the number of the generated signal groups may be 4 or more than 4. When 0 < N < 3, the number of the plurality of signal groups is greater than or equal to 3. For example, when the syringe rear end portion 2 is rotated by one rotation with respect to the syringe front end portion to suck or discharge 1 dose unit of medical fluid, the number of signal groups generated may be 3 or more than 3. Based on this scheme, the rotational direction of the syringe rear end portion 2 can be judged easily.

The principle of the auxiliary device for calculating the inhaled dose of a syringe will now be explained. As described above, when the syringe is used for a drug-sucking operation, the rear end portion 2 of the syringe is required to be rotated relative to the front end portion 1 of the syringe, and the amount of the drug-sucking dose of the syringe is correlated with the amount of rotation.

Referring to fig. 7, first, a case will be described in which 3 dosage units of the liquid medicine are produced when the rear end portion 2 of the syringe makes one rotation.

In the preferred embodiment shown, the number of signal groups generated is 3, the first inductor has 2, and the second inductor has 2. The first inductor and the second inductor are spaced at the same angle of 120 degrees.

Taking the first sensor A as a starting point, taking the relative position 1 as a starting position, and according to a preset sequence of A-B:

in the case where the rear injector section 2 is rotated in the first direction, a signal group 11 is generated when the rear injector section 2 is at the opposing position 1, a signal group 10 is generated when the rear injector section 2 is rotated to the opposing position 2, and a signal group 01 is generated when the rear injector section 2 is rotated to the opposing position 3. The resulting signal information is 11-10-01.

In the case where the injector rear end portion 2 is rotated in the second direction, the signal group generated when the injector rear end portion 2 is at the relative position 1 is 11, next, the signal group generated when the injector rear end portion 2 is rotated to the relative position 3 is 01, and the signal group generated when the injector rear end portion 2 is rotated to the relative position 2 is 10. The resulting signal information is 11-01-10.

Thus, when the signal information generated when the syringe rear end portion 2 is rotated in the first direction and the second direction is different, the dose calculation unit can judge the rotation direction of the syringe rear end portion 2 based on the signal information, and as described above, when the syringe rear end portion 2 is rotated one revolution in the first direction, the dose calculation unit can accumulate the medical fluid data of 3 dose units. The dose calculation unit may subtract out the medical fluid data of 3 dose units when the rear end portion 2 of the syringe is rotated one revolution in the second direction.

Referring to fig. 8, the following description will be made by taking, as an example, a case where a liquid medicine of 4 dosage units is produced when the rear end portion 2 of the syringe is rotated once.

In the preferred embodiment shown, the number of signal groups generated is 4, the first inductor has 3, and the second inductor has 2. The first inductors are spaced 90 degrees from each other and the second inductors are spaced 90 degrees from each other.

Taking a first inductor A as a starting point, taking a relative position 1 as a starting position, and according to a preset sequence of A-B-C:

in the case where the injector rear-end portion 2 is rotated in the first direction, the signal group generated when the injector rear-end portion 2 is at the relative position 1 is 110, the signal group generated when the injector rear-end portion 2 is rotated to the relative position 2 is 100, the signal group generated when the injector rear-end portion 2 is rotated to the relative position 3 is 001, and the signal group generated when the injector rear-end portion 2 is rotated to the relative position 4 is 011. The resulting signal information is 110-100-001-011.

In the case where the injector rear-end portion 2 is rotated in the second direction, the signal group generated when the injector rear-end portion 2 is at the relative position 1 is 110, next, the signal group generated when the injector rear-end portion 2 is rotated in the second direction to the relative position 4 is 011, the signal group generated when the injector rear-end portion 2 is rotated to the relative position 3 is 001, and the signal group generated when the injector rear-end portion 2 is rotated to the relative position 2 is 100. The resulting signal information is 011-001-100-110.

Thus, when the signal information generated when the rear end portion 2 of the syringe is rotated in the first direction and the second direction is different, the dose calculation unit may judge the rotation direction of the rear end portion 2 of the syringe based on the signal information, and as described above, when the rear end portion 2 of the syringe is rotated one revolution in the first direction, the dose calculation unit may accumulate the medical fluid data of 4 dose units. The dose calculation unit may subtract the liquid medicine data of 4 dose units when the rear end portion 2 of the syringe is rotated one revolution in the second direction.

If the rear syringe part 2 is rotated once to produce only 1 or 2 dosage units of the liquid medicine, for this case too, it is necessary to produce at least three signal groups at the time of one rotation of the rear syringe part 2 so that the dose calculation unit can recognize the direction of rotation of the rear syringe part 2. In the case where only 1 or 2 dosage units of the medical fluid are generated by one rotation of the rear portion 2 of the syringe, the dose calculation unit may add or subtract one dosage unit of the medical fluid by changing the signal group a plurality of times, depending on the number of the first or second sensors and the rotation direction of the rear portion 2 of the syringe. Of course, it will be appreciated that while the rear injector portion 2 produces 3 or more than 3 dosage units of fluid upon one revolution, it is also possible to use a single set of signals that varies once as a superposition or subtraction of one dosage unit of fluid.

Referring to fig. 9, the following description will be made taking as an example a case where 2 dosage units of the liquid medicine are produced when the rear end portion 2 of the syringe makes one rotation.

In the preferred embodiment shown, the number of signal groups is 6, the first inductor has 2 and the second inductor has 4. The first inductors are spaced apart from each other by 60 degrees, and the second inductors are spaced apart from each other by 60 degrees or an integer multiple of 60 degrees.

Taking a first inductor A as a starting point, taking a relative position 1 as a starting position, and according to a preset sequence of A-B:

in the case where the injector rear end portion 2 is rotated in the first direction, the signal group generated when the injector rear end portion 2 is at the relative position 1 is 11, the signal group generated when the injector rear end portion 2 is rotated to the relative position 2 is 10, and the signal group generated when the injector rear end portion 2 is rotated to the relative position 3 is 01. The resulting set of signal information is "11-10-01". Continuing to rotate, a set of signal information "11-10-01" is again generated through position 4, position 5 and position 6. The signal information generated by the continuous rotation is "11-10-01" - "11-10-01".

In the case where the injector rear end portion 2 is rotated in the second direction, the signal group generated when the injector rear end portion 2 is at the relative position 1 is 11, next, the signal group generated when the injector rear end portion 2 is rotated to the relative position 6 is 01, and the signal group generated when the injector rear end portion 2 is rotated to the relative position 5 is 10. The resulting set of signal information is "11-01-10". Continuing to rotate, passing through position 4, position 3 and position 2 again generates a set of signal information "11-01-10". The signal information generated by the continuous rotation is "11-01-10" - "11-01-10".

Thus, the signal information sets generated when the rear end portion 2 of the syringe is rotated in the first direction and the second direction are different from each other, and therefore the signal information is also different from each other, and the dose calculation unit can determine the rotation direction of the rear end portion 2 of the syringe based on the signal information, and as described above, when the rear end portion 2 of the syringe is rotated one revolution in the first direction, the dose calculation unit continuously receives two sets of "10-01-00" signal information, and can accumulate the medical fluid data of 2 dose units. When the rear end portion 2 of the syringe rotates one revolution in the second direction, the dose calculation unit receives two sets of signal information 11-01-10 successively, and the dose calculation unit can subtract the liquid medicine data of 2 dose units.

Referring back to fig. 4 and 5, in a preferred embodiment, the supplemental device further includes an intelligent assembly switch 160 disposed near the additional injection button 150 for controlling the operation of the sensing device 101. In actual operation, when the injector is completely pressurized, the injector button 4 pops up to cause the additional injection button 150 to pop up and touch the smart component switch 160 to turn on, thereby activating the sensing device 101. When the additional injection button 150 is pressed, the intelligent assembly switch 101 is automatically turned off, whereby the sensing means 101 registers the movement of the relevant part of the injector during a drug inhalation, thereby determining the drug inhalation dose.

In particular, the dose calculation unit is configured to be able to determine a metering zero point for a bolus dose when the switch 160 is on, calculate a bolus dose from the metering zero point, the signal information and the number of received signal sets, and record an injection time when the switch 160 is off.

In the preferred embodiment described above, the assisting apparatus 100 may further include a display provided in the sleeve 120 for displaying the inhalation dose calculated by the dose calculating unit. Of course, it is contemplated that the display may also display the current time, the last injection time, the next scheduled injection time, and the like. Of course, the auxiliary device 100 of the present invention may communicate with the outside through the communication module, thereby displaying various information on the external display.

According to the above-mentioned preferred embodiment, the intelligent component may further comprise a user prompting device for prompting the user of the status of the injector, the operation required by the user, and the like, for example, the user may be prompted to approach and/or reach the injection interval time according to the last injection time data and the predetermined injection interval time data stored by the control device, and the user may be prompted to approach and/or reach the predetermined drug-sucking dosage during the drug-sucking process of the injector according to the drug-sucking dosage data stored by the control device.

According to the above described preferred embodiments, the prompting means of the user prompting device may comprise one or more of a visual prompt, an audio prompt and a tactile prompt, i.e. the user prompting device comprises one or more of a visual prompting device, an audio prompting device and a tactile prompting device.

According to the above described preferred embodiment, the visual cue means may comprise an indicator light for alerting the user by a changing state or a steady state light, wherein the changing state of the light comprises a change in brightness and/or a change in color of the light.

According to the above described preferred embodiment, the sound prompting device may comprise a buzzer for prompting the user by sound.

According to the preferred embodiment described above, the tactile sensation prompting device may include a vibrator for prompting the user by vibration.

According to the above-mentioned preferred embodiment, the smart component may further include a wireless module, configured to wirelessly transmit related data to a network and/or a corresponding data terminal device, where the wireless module may include a WIFI module and/or a bluetooth module, the data terminal device may include a computer and/or a smart mobile device such as a mobile phone, a tablet computer, and the like, and the related data may include one or more of an injection time, an injection interval time, an injection number, and an injection dose. Upon receiving the relevant data sent by the auxiliary device, the data terminal equipment is able to use the data to statistically analyze the usage of the injector and provide feedback to the user and/or to a person associated with the user, such as a doctor, a relative, etc.

According to the preferred embodiment described above, the switch 120 may be a microswitch, also known as a sensitive switch, snap action switch, or the like.

The scope of the invention is limited only by the claims. Persons skilled in the art, having the benefit of the teachings of this invention, will readily appreciate that alternative embodiments to the disclosed structures may be provided as viable alternatives, and that the disclosed embodiments may be combined to create new embodiments, or that the invention may be applied to other similar fields, for example, the accessory device according to the invention may be used on other devices like syringes that draw or push fluids by relative rotational and longitudinal movement between two components, and still fall within the scope of the appended claims.

Claims

1. An accessory device for a syringe, the syringe comprising: a front injector part and a rear injector part, and an injection button positioned at the rear end of the rear injector part, the rear injector part can rotate relative to the front injector part along a first direction to perform medicine suction operation and along a second direction opposite to the first direction to perform medicine discharge operation so as to obtain the expected medicine quantity,

wherein the auxiliary device comprises:

a control device in communication with the sensing device, the control device configured to control an actual amount of drug in the syringe based on the signal information so as to achieve a desired amount of drug.

2. The supplemental device of claim 1, wherein the sensing device comprises a plurality of first inductors disposed on the rear sleeve at spaced intervals circumferentially thereof, a plurality of second inductors disposed at the syringe forward end portion, the first inductors configured to emit a sensing signal when proximate the second inductors.

3. The assistance apparatus according to claim 2, wherein the signal information is a sequence of a plurality of signal groups, the signal groups being combinations of sensing signals sensed by the plurality of first sensors when rotated to a predetermined position in a predetermined order.

4. The accessory device of claim 3, wherein the syringe is configured to aspirate or expel N dose units of medical fluid and to generate a plurality of signal sets when the syringe rear portion is rotated one revolution relative to the syringe front portion, wherein N is greater than 0 and the number of the plurality of signal sets is associated with a value of N, the control device comprising a dose calculation unit configured to determine a rotational direction of the syringe rear portion based on the signal information and configured to calculate an actual amount of drug based on the rotational direction and the number of the plurality of signal sets.

5. Auxiliary device according to claim 4, characterized in that the plurality of second inductors are angularly spaced from each other by an integer multiple of the angular spacing of the plurality of first inductors from each other, and/or in that the number of first inductors and second inductors is associated with a value of N.

6. The supplemental device of claim 4, wherein the number of the plurality of signal groups is greater than or equal to the number of dosage units when N ≧ 3, and the number of the plurality of signal groups is greater than or equal to 3 when 0 < N < 3.

7. The supplemental device of claim 2, further comprising a front sleeve disposed over the front portion of the injector and movable therewith, the second inductor being disposed in the front sleeve.

8. The supplemental device of claim 2, wherein the second inductor is disposed in the injector nose section.

9. The supplemental device of claim 1, wherein the rear end sleeve is connected to the syringe rear end portion in a hinged or snap-fit connection.

10. The supplemental device of claim 4, further comprising an injection control assembly disposed at a rearward end of the rearward sleeve and engageable with the injection button to control injection, a rearward end wall of the rearward sleeve having an aperture therein, the injection control assembly being disposed in the aperture.

11. The supplemental device of claim 10, wherein the injection control assembly comprises:

12. The supplemental device of claim 11, wherein the aperture has a circumferentially formed groove in an aperture wall such that the aperture has a front projection and a rear projection projecting radially inwardly respectively at a front and a rear of the aperture, the injection control assembly including a return spring that is nested over the additional injection button and that is disposed in the groove.

13. The supplemental device of claim 12, wherein the additional injection button comprises a hollow body and a flange at a front of the body, the additional injection button being sized such that the flange can be received within the recess, and the body of the additional injection button being longitudinally movable through an aperture defined by the rearward projection.

14. The assistance device according to claim 12, further comprising:

15. The assistance device according to claim 14, characterized in that the dose calculation unit is configured to:

recording an injection time when the smart component switch is off.

16. The accessory device of claim 1, wherein the rear end sleeve is further provided with a display for displaying the actual amount of medicament and the injection time.

17. Assist device as claimed in claim 7, characterized in that the front sleeve is connected to the syringe front part in a hinged or snap-on connection.

18. The assistance device according to claim 1, characterized in that it further comprises a wireless module for transmitting data to a network and/or a data terminal equipment.

19. Auxiliary device according to claim 18, characterized in that said wireless module comprises a WIFI module and/or a bluetooth module and said data terminal equipment comprises a computer and/or a smart mobile device.

20. The assistive device of claim 18, wherein the data comprises one or more of injection time, injection interval time, number of injections, inhaled dose, expelled dose, actual dose.

21. Auxiliary device according to any of claims 1-20, wherein the first sensor is a hall element and the second sensor is a magnet, or the first sensor and the second sensor are light sensors.

22. An injection system comprising a syringe and a supplemental device as claimed in any of claims 1 to 21, the supplemental device being nested within the syringe from a rear end portion of the syringe.

23. The injection system of claim 22, wherein the sensing device comprises a first plurality of sensors disposed on the trailing sleeve, the first plurality of sensors being spaced circumferentially of the trailing sleeve, the injection system further comprising a second plurality of sensors disposed at the forward end portion of the syringe, the first sensors being configured to emit a sensing signal when proximate the second sensors.

24. The injection system of claim 23, wherein the syringe is configured to aspirate or expel N dosage units of medical fluid when the syringe rear portion is rotated one revolution relative to the syringe front portion, wherein N is greater than 0 and the number of the first and second plurality of sensors is related to the value of N.

25. The injection system of claim 24, wherein the injector is configured to generate a plurality of signal sets when the injector back portion is rotated one revolution relative to the injector front portion, the plurality of signal sets being greater than or equal to the number of dosage units when N ≧ 3, and the plurality of signal sets being greater than or equal to 3 when 0 < N < 3.

26. The injection system of claim 25, wherein the plurality of second inductors are angularly spaced apart from one another by an integer multiple of the angular spacing of the plurality of first inductors from one another.

27. The injection system of claim 23, wherein the supplemental device further comprises a front end sleeve disposed over and movable with the syringe front end portion, the second inductor being disposed in the front end sleeve.

28. The injection system of claim 23, wherein the second inductor is disposed in the injector nose portion.

29. The injection system of claim 23, wherein the injector is a needle-free injector.