CN111407976A

CN111407976A - Injection mechanism and electronic injection pen

Info

Publication number: CN111407976A
Application number: CN202010150024.0A
Authority: CN
Inventors: 侯耀钧
Original assignee: Zhuhai Kaisheng Medical Technology Co ltd
Current assignee: Zhuhai Kaisheng Medical Technology Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-07-14

Abstract

The invention discloses a push injection mechanism and an electronic injection pen with the same, wherein the push injection mechanism comprises: a propelling mechanism and an injection mechanism. The propelling mechanism is used for propelling the cassette bottle and the needle. The injection mechanism is arranged on the propelling mechanism and driven by the propelling mechanism, and is used for pushing the piston to inject liquid medicine into an injection object. The pushing mechanism is provided with a guide slot, the piston push rod is an elastic rod and penetrates through the guide slot, and the head end and the tail end of the piston push rod can reciprocate in different directions under the driving of the injection driving device. According to the injection mechanism of the technical scheme, the piston push rod is the elastic rod which can be bent, and the injection mechanism and the card type bottle are not arranged on the same line, so that the length of the injection device is shortened, and the injection device is easy to carry.

Description

Injection mechanism and electronic injection pen

Technical Field

The invention relates to the field of medical instruments, in particular to a pushing mechanism and an electronic injection pen with the same.

Background

At present, automatic injection devices such as injection pens, injection racks and the like are available in the market, so that patients can conveniently inject some medicines by themselves, and frequent visit to hospitals is avoided. The existing automatic injection equipment mostly adopts a syringe injection mode, and an injection mechanism for executing injection needs to be arranged on the same straight line with a cassette bottle, so that the injection equipment is too long and is not easy to carry about.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the pushing mechanism, the piston push rod is a flexible rod, and the piston push rod is bent through the guide groove, so that the injection mechanism and the cassette bottle can not be arranged on the same line, and the miniaturization of injection equipment is facilitated.

The invention also provides an electronic injection pen with the injection mechanism.

In a first aspect, a bolus mechanism according to an embodiment of the invention comprises: the propelling mechanism is provided with a guide groove and is used for pushing the cassette bottle and the needle head so that the needle head can be inserted into an injection object to a certain depth; the injection mechanism is arranged on the propelling mechanism, can reciprocate in a certain direction under the driving of the propelling mechanism, is used for pushing the piston of the cassette bottle to move so as to inject liquid medicine to an injection object, and comprises an injection driving device and a piston push rod, wherein the head end of the piston push rod is connected with the injection driving device, and the tail end of the piston push rod is used for pushing the piston of the cassette bottle; the piston push rod is an elastic rod and penetrates through the guide groove, and the head end of the piston push rod can reciprocate in a direction different from the movement direction of the tail end of the piston rod under the driving of the injection driving device.

The injection mechanism provided by the embodiment of the invention has at least the following beneficial effects: the piston push rod is an elastic rod which can be bent, and the pushing direction of the piston push rod is ensured through the guide groove. Because the piston push rod can be bent, the injection mechanism and the cassette bottle are not arranged on the same straight line, thereby shortening the length of the injection device and leading the injection device to be easy to carry about.

According to some embodiments of the present invention, the pushing mechanism includes a pushing driving device and a pushing bracket connected to the pushing driving device, the pushing bracket can reciprocate under the driving of the pushing driving device, the injection driving device is disposed on the pushing bracket, and the guide groove is disposed on the pushing bracket.

According to some embodiments of the present invention, the pushing driving device includes a first motor, a first transmission device, and a first screw pair, an output shaft of the first motor is connected to a screw of the first screw pair through the first transmission device, and the bolus injection frame is connected to a nut of the first screw pair.

According to some embodiments of the present invention, the injection driving device comprises a second motor, a second transmission device and a second screw pair, an output shaft of the second motor is connected to a screw of the second screw pair through the second transmission device, and a head end of the piston rod is connected to a nut of the second screw pair.

According to some embodiments of the invention, the guide slot is a U-shaped guide slot.

In a second aspect, an electronic injection pen according to an embodiment of the present invention comprises: a housing; a bolus mechanism according to the first aspect of the invention disposed within the housing; the bin body is arranged on the propelling mechanism, a cavity capable of containing a cassette bottle is formed in the bin body, openings communicated with the cavity are formed in the upper end and the lower end of the bin body, and a needle head can be installed at the lower end of the bin body; the control panel is used for controlling the propulsion mechanism and the injection mechanism to work; the operation panel is arranged on the shell, is electrically connected with the control panel and is used for inputting operation information and displaying state information; and the storage battery is arranged in the shell and used for providing electric energy for the propelling mechanism, the injection mechanism, the control panel and the operation panel.

The electronic injection pen provided by the embodiment of the invention at least has the following beneficial effects: with the injection mechanism according to the embodiment of the first aspect of the present invention, the length of the injection pen can be reduced while ensuring that the injection pen can provide an automatic injection function, and the injection pen is convenient to carry, and the free space can be used for preventing a larger storage battery or other components from enhancing the performance of the injection pen.

According to some embodiments of the invention, one end of the cartridge body is rotatably connected to the advancing mechanism.

According to some embodiments of the invention, further comprising: the buckle mechanism comprises a female buckle part arranged on the bin body and a male buckle part arranged on the pushing mechanism, and the male buckle part can be clamped with the female buckle part to lock the bin body in the shell; the first elastic piece is arranged on the bin body at one end and on the pushing mechanism at the other end and used for driving the bin body to rotate for a certain angle relative to the shell so that one end of the bin body extends out of the shell; the releasing mechanism is arranged on the shell and used for enabling the male buckle part to release the female buckle part; when the male buckle part is clamped with the female buckle part, elastic potential energy is accumulated by the elastic component, and when the male buckle part releases the female buckle part, the elastic potential energy is released by the elastic component.

According to some embodiments of the invention, the push mechanism further comprises a push-out protection structure, the push-out protection structure is arranged on the shell, and when the push mechanism is not in the safety position, the push mechanism is locked by the push-out protection structure, so that the release mechanism cannot be actuated.

According to some embodiments of the invention, a skin sensor is provided at a lower end, the skin sensor being electrically connected to the control board.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a bolus mechanism according to an embodiment of the invention;

FIG. 2 is a schematic structural view of an injection mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic view of a bolus mechanism according to an embodiment of the invention from another perspective;

FIG. 4 is a schematic diagram of an internal structure of an electronic injection pen according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an internal structure of an electronic injection pen according to another view angle of the present invention;

FIG. 6 is a schematic view of the installation of the male buckle portion according to the embodiment of the present invention;

FIG. 7 is a schematic view of the release switch assembly of the present invention;

FIG. 8 is a schematic diagram of a pop-up protection structure according to an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at A;

fig. 10 is a schematic distribution diagram of skin sensors according to an embodiment of the invention.

Reference numerals:

a propelling mechanism 100, a propelling driving device 110, a first motor 111, a first screw pair 112, a first transmission device 113, a push injection bracket 120, a guide groove 121, a gland 122, a propelling mechanism bracket 130,

an injection mechanism 200, an injection driving device 210, a second motor 211, a second lead screw pair 212, a second transmission device 213, a piston push rod 220,

a bin body 300, a bin body button 301, a buckling mechanism 310, a female button part 311, a clamping piece 312, a first elastic piece 320, a releasing mechanism 330, a releasing switch 331, a transmission structure 332, a slide block 333, a push handle 334,

the housing 400 is provided with a plurality of openings,

the ejection protection structure 500, the first moment arm 501, the second moment arm 502,

the bin gate 600, the detection boss 601,

the skin sensor 700.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 and 2, a bolus mechanism 200 according to an embodiment of the first aspect of the present invention includes a propulsion mechanism 100 and an injection mechanism 200. The pushing mechanism 100 is used for pushing the cassette bottle and the needle to reciprocate up and down, so that the needle can be inserted into an injection object to a certain depth. The injection mechanism 200 is provided on the pushing mechanism 100 and driven by the pushing mechanism 100, and the injection mechanism 200 is used to push the piston of the cartridge bottle so that the medical fluid in the cartridge bottle can be injected into the body of the subject to be injected. The injection mechanism 200 includes an injection driving device and a piston rod 220 connected to the injection driving device, the head end of the piston rod 220 is connected to the injection driving device, and the tail end of the piston rod 220 is used for pushing the piston of the cassette bottle. The piston rod 220 is a flexible elastic rod, and the end of the piston rod 220 can reciprocate in a certain direction under the driving of the injection driving device, so as to push the piston of the cassette bottle to move. The pushing mechanism 100 is provided with a guide groove 121 for guiding the piston push rod 220, the piston push rod 220 is arranged in the guide groove 121 in a penetrating manner, and when the injection pushing device drives the tail end of the piston push rod 220 to move, the tail end of the piston push rod 220 can move towards a movement direction different from the head end of the piston push rod under the action of the guide groove 121. By using the above technical scheme of the injection mechanism 200, since the piston push rod 220 can be bent, the movement direction of the tail end of the piston push rod 220 can be changed through the guide groove 121, and the injection driving device 210 can be arranged on a non-collinear line with the cassette bottle, so that the length of the injection device is shortened, and the injection device is convenient to carry. Meanwhile, space can be reserved for other parts such as a storage battery and the like, so that the injection equipment is convenient to carry, and the cruising performance is improved or other functions are added. It is understood that the injection driving device 210 can be a linear driving device such as a spring or a cylinder, or a rotational motion and linear motion conversion device such as a motor and a lead screw.

Referring to fig. 1 and 2, in some embodiments, propulsion mechanism 100 includes a bolus stent 120 and a propulsion drive 110. The bolus stent 120 is coupled to the push driving device 110 and can reciprocate in a certain direction by the push driving device 110. The injection mechanism 200 is disposed on the bolus support 120, and the guide groove 121 is disposed on the bolus support 120. It is understood that the propulsion driving device 110 can be a linear driving device such as a spring or a cylinder, or a motor and a rotary motion and linear motion conversion device such as a lead screw.

Referring to fig. 2, in some embodiments, the guide groove 121 is a U-shaped guide groove 121. The piston rod 220 is guided by the guide channel 121 and its end movement direction may be opposite to that of its head end movement direction, in which case the injection mechanism 200 may be juxtaposed with the cartridge, and the injection device may be shortened or vacated by approximately one injection mechanism 200 length. Meanwhile, the inner wall of the U-shaped guide groove 121 is not provided with edges, and the piston push rod 220 can move smoothly in the U-shaped guide groove 121 and is not easy to clamp.

Referring to fig. 4 and 10, the electronic injection pen according to the second aspect of the present invention includes the bolus mechanism 200 according to the first aspect of the present invention, and further includes a housing 400, and a cartridge 300, a control board, an operation panel, and a battery disposed inside the housing 400. The propulsion mechanism 100 is disposed within the housing 400 as is the injection mechanism 200. The bin body 300 is arranged on the pushing mechanism 100, a cavity capable of accommodating the card bottle is arranged in the bin body, openings communicated with the cavity are formed in the upper end and the lower end of the bin body, and a needle head can be installed at the lower end of the bin body. The control panel is used for controlling the propulsion mechanism 100 and the injection mechanism 200 to work, the operation panel is electrically connected with the control panel and used for inputting operation information and displaying state information, and the storage battery is used for supplying power to components needing electric energy in the propulsion mechanism 100, the injection mechanism 200, the control panel and the operation panel.

Referring to fig. 4, in some embodiments, the cartridge body 300 is rotatably connected at one end to the advancement mechanism 100. The injection pen further comprises a catch mechanism 310 for fixing the cartridge body 300 in the casing 400, a first elastic member 320 for driving the cartridge body 300 to eject from the casing 400, and a release mechanism 330 for driving the catch mechanism 310 to disengage. Wherein any end of the bin body 300 is rotatably connected with the main body of the injection pen, the two ends of the bin body 300 are open, the lower end of the bin body 300 can be provided with a needle, the bin body 300 can rotate for a certain angle around the joint with the injection pen, so that one end of the bin body 300 extends out of the shell 400 of the injection pen, and the insertion of the cassette bottle is facilitated. The fastening mechanism 310 includes a female fastening portion 311 disposed on the bin body 300 and a male fastening portion disposed on the pushing mechanism 100, and when the female fastening portion 311 and the male fastening portion are fastened, the bin body 300 cannot move relative to the pushing mechanism 100. The first elastic member 320 is disposed on the cartridge body 300, and one end thereof is connected to the cartridge body 300, and the other end thereof is connected to the main body of the injection apparatus. The releasing mechanism 330 is disposed on the casing 400, and is used for separating the male buckle portion from the female buckle portion 311 of the buckle mechanism 310, so that the cartridge body 300 can rotate relative to the injection device body. It will be appreciated that the release mechanism 330 may separate either the male or female portions 311 by displacing one of the two or by deforming the male or female portions 311. Above-mentioned technical scheme can make user's quick replacement card formula bottle, changes the card formula bottle in-process and need not to demolish any part, can not cause the spare part of change in-process to lose or damage.

Referring to fig. 4 and 9, in some embodiments, the electronic injection pen further includes an ejection protection structure 500, and the ejection protection structure 500 is used to prevent the cartridge 300 from ejecting out due to the release mechanism 330 triggered by the user when the cartridge 300 is pushed downward by a certain distance, which may cause the internal components to be jammed or the needle to be broken. When the pushing mechanism 100 is in the safety position, the ejection protection structure 500 does not work, and the release mechanism 330 can be normally triggered to eject the cartridge body 300; when the propelling mechanism 100 is not in the safe position, the ejection protection structure 500 abuts against the release mechanism 330, and the resistance release mechanism 330 triggers, so that the cartridge body 300 cannot be ejected, and the safety of the electronic injection pen is ensured. It is understood that the pop-up protection structure 500 may be a sensor that detects whether the propulsion mechanism 100 is in a safe position by cooperating with the propulsion mechanism 100.

Referring to fig. 10, in some embodiments, the electronic injection pen further includes a skin sensor 700, and the skin sensor 700 is disposed at a lower end of the injection pen and electrically connected to the control board. The skin sensor 700 can detect whether the lower end of the injection pen is in contact with the skin or not, and feeds detection information back to the control panel, so that the control panel controls the pushing mechanism 100 not to work when the electronic injection pen is not in contact with the skin, and the needle is prevented from being damaged or injuring other people by mistake.

A bolus mechanism 200 and an electronic injection pen having the same according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 10 in a specific embodiment. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.

Referring to fig. 1, 2 and 3, in the present embodiment, the propelling mechanism 100 and the injection mechanism 200 are both driven by a motor and a screw rod. The propulsion drive device 110 includes a first motor 111, a first screw pair 112, and a first transmission device 113, and a screw of the first screw pair 112 is in transmission connection with an output shaft of the first motor 111 through the first transmission device 113. The injection driving device 210 includes a second motor 211, a second screw pair 212, and a second transmission device 213, and the screw of the second screw pair 212 is connected to the output shaft of the second motor 211 through the second transmission device 213. The bolus bracket 120 is connected to the nut of the first screw pair 112, and the head end of the piston rod 220 is connected to the nut of the second screw pair 212. The first screw pair 112, the first motor 111 and the first transmission device 113 are all disposed on the pushing mechanism bracket 130. In order to make the propelling movement of the propelling mechanism 100 and the injection movement of the injection mechanism 200 more stable, in the present embodiment, the first transmission device 113 and the second transmission device 213 are both gear sets, and the gear sets can transmit power and simultaneously have the effects of improving the movement precision, reducing the speed and improving the torque.

Referring to fig. 2 and 3, in the present embodiment, the piston rod 220 is a spring rod, and there is no space between the coils of the spring, so that the spring rod can provide a uniform thrust for the piston when bearing an axial force, which is the same as that of a conventional rod body. Correspondingly, the guide groove 121 is a U-shaped arc groove, and the diameter of the groove is the same as the diameter of the piston push rod 220, so that the piston push rod 220 can stably move along the groove wall in the guide groove 121. In this embodiment, the end of the piston rod 220 is provided with a circular pressing sheet with an area smaller than that of the piston of the cassette bottle, so that the contact area between the piston rod 220 and the piston is increased, and the stress uniformity of the piston is further improved. In order to prevent the piston rod 220 from being popped out of the guide groove 121, the guide groove 121 is covered by the pressing cover 122, so that the guide groove 121 and the pressing cover 122 form a channel with two open ends for the piston rod 220 to pass through.

Referring to fig. 5, in the present embodiment, the bin 300 and the injection mechanism 200 are both disposed on the pushing rack 120 of the pushing mechanism 100, and the bin 300 is rotatably connected to the bin 300 via a bin buckle 301. The first elastic member 320 is a torsion spring, the cartridge body 300 is provided with a cylindrical boss, the first elastic member 320 is sleeved on the cylindrical boss, and two ends of the first elastic member 320 are respectively connected with the pushing injection bracket 120 and the cartridge body 300. It is understood that the first elastic member 320 may be an elastic member such as a spring or a leaf spring disposed between the cartridge body 300 and the bolus support 120.

Referring to fig. 4, 6 and 7, in the present embodiment, the female fastening portion 311 is disposed on the top of the bin body 300 and has a hook-shaped structure. The male buckle portion includes a clamping member 312 and a second elastic member (not shown in the figure), the lower end of the clamping member 312 has a second hook structure matching with the first hook structure of the female buckle portion 311, the clamping member 312 is installed in a groove of the bolus injection stent 120, and the clamping member 312 can move up and down along the groove. In this embodiment, the second elastic member is a spring, the second elastic member is disposed in the groove at the upper end of the engaging member 312, the upper end of the second elastic member abuts against the groove wall of the engaging member 312, and the lower end of the second elastic member abuts against the bolus injection stent 120. When the engaging member 312 engages with the first hook-shaped structure of the female engaging portion 311, the engaging member 312 moves downward under the external force of the releasing mechanism 330, so that the two hook-shaped structures are separated, and when the external force disappears, the engaging member 312 is restored under the action of the second elastic member. When the bin 300 is pushed into the casing 400 from the outside, the first hook-shaped structure of the female buckle portion 311 contacts with the inclined surface of the second hook-shaped structure of the engaging member 312, so that the engaging member 312 moves downward along the inclined surface until the female buckle portion 311 is engaged with the engaging member 312, and the engaging member 312 moves upward under the action of the second elastic member, so that the engagement between the female buckle portion 311 and the engaging member 312 is firmer. It is understood that the second elastic member may also be an elastic member such as a spring plate or a torsion spring disposed between the engaging member 312 and the bolus support 120.

Referring to fig. 4 and 7, in the present embodiment, the release mechanism 330 includes a release switch 331 and a transmission structure 332. When the release switch 331 is triggered, the action thereof is transmitted to the male buckle portion through the transmission structure 332, so that the male buckle portion is separated from the female buckle portion 311. In this embodiment, the release switch 331 includes a push handle 334 and a slider 333, the push handle 334 and the slider 333 are respectively disposed on the outer side of the casing 400 and the inner side of the casing 400, the push handle 334 and the slider 333 clamp the casing 400 between the two through a slot on the side of the casing 400, and the push handle 334 and the slider 333 can move up and down along the slot. The transmission structure 332 is a lever structure with a rotating shaft disposed on the housing 400, one force arm of the transmission structure 332 contacts with the slider 333, and the other force arm contacts with the upper end of the engaging member 312. The pushing handle 334 is pushed upwards, the slider 333 is driven by the pushing handle 334 to move upwards, the pushing transmission structure 332 is driven to rotate clockwise around the shaft, and the engaging member 312 is driven to move downwards to separate the engaging member 312 from the female buckle portion 311. When the pushing handle 334 loses the external force, the engaging member 312 is driven by the second elastic member to move upward, so that the transmission structure 332 rotates counterclockwise, and the pushing handle 334 returns to the original position. It will be appreciated that the specific configuration of the release mechanism 330 is designed according to the manner in which the catch mechanism 310 is to be released.

Referring to fig. 4, 7 and 9, in the present embodiment, the pop-up protection structure 500 includes a V-shaped lever and a third elastic member (not shown) disposed on the V-shaped lever. The rotating shaft of the V-shaped lever is disposed on the housing 400. When the pushing mechanism 100 is pushed out downwards by a certain distance, and the pushing mechanism 100 is not in the safe position, the V-shaped lever rotates towards the inside of the paper in fig. 4 under the action of the third elastic member until the first force arm 501 of the V-shaped lever presses on the slider 333, as shown in fig. 9, it is difficult for the user to push the push handle 334 to operate the release mechanism 330, so as to prevent the bin 300 from popping out in this state to cause the device damage. When the pushing mechanism 100 moves upwards, the pushing bracket 120 abuts against the second force arm 502 of the V-shaped lever, the V-shaped lever is driven by the pushing bracket 120 to rotate in the paper-out direction of fig. 4 until the pushing mechanism 100 reaches the safety position, the first force arm 501 of the V-shaped lever is separated from the slider 333, at this time, the bin body 300 can be safely ejected, and a user can operate the release mechanism 330 by pushing the handle 334 to eject the bin body 300. It is understood that the pop-up protection structure 500 is designed according to the working principle of the release mechanism 330, and the third elastic member may be a spring plate or a spring-like elastic member.

Referring to fig. 4, in the present embodiment, the electronic injection pen further includes a bin gate 600, one end of the bin gate 600 is rotatably connected to the casing 400, and the movement direction of the bin gate 600 is the same as the movement direction of the bin 300 when it is ejected. In this embodiment, the lower end of the door 600 is provided with two cylindrical pins in pairs, the housing 400 is correspondingly provided with two circular blind holes, and the door 600 is rotatably connected by inserting the two cylindrical pins into the two circular blind holes respectively. The upper side of the bin gate 600 is provided with a buckle, and when the bin gate 600 is closed, the lower side of the push handle 334 can be matched with the buckle on the bin gate 600 to lock the bin gate 600, so that the bin gate 600 cannot be opened. When the user pushes the push handle 334 upward, the bin gate 600 and the bin body 300 are released simultaneously, and the bin gate 600 is ejected by the driving of the bin body 300. In this embodiment, the sensor of the bin gate 600 is a micro switch, and the bin gate 600 is provided with a detection boss 601. When the door 600 is closed, the detection boss 601 contacts the contact of the door 600 sensor to operate the door 600 sensor, thereby detecting the open/closed state of the door 600. It can be understood that the sensor of the door 600 can also be a photoelectric switch, a hall sensor, etc., and a corresponding triggering structure needs to be disposed on the door 600.

Referring to fig. 10, in the present embodiment, the front end of the electronic injection pen is provided with 4 skin sensors 700, and the 4 skin sensors 700 are distributed around the needle outlet on the housing 400. The 4 skin sensors 700 can improve the measurement accuracy and ensure that the lower end of the injection pen is in good contact with the skin. In the present embodiment, the 4 skin sensors 700 each employ a pyroelectric infrared sensor. It is understood that the 4 skin sensors 700 may employ one or a combination of infrared sensors, photoelectric sensors, or bio-electric sensors to improve the accuracy of the measurement.

According to the injection mechanism provided by the embodiment of the invention, the piston push rod is a flexible rod, and the injection mechanism and the cassette bottle are not arranged on the same line, so that the length of the injection device is shortened, and the injection device is easy to carry. Meanwhile, a larger installation space can be reserved for the storage battery or other devices, so that the storage battery with larger installation capacity of the injection pen or other functional devices can be installed, and the performance of the injection pen is improved while the size of the injection pen is not increased.

The electronic injection pen provided by the embodiment of the invention is provided with the injection mechanism provided by the embodiment of the invention, and the electronic injection pen is small in length and size and convenient to carry about. The storehouse body that is used for holding the card type bottle simultaneously can pop out from casing one side, is convenient for change the card type bottle, and the change simple operation need not to dismantle the part simultaneously, can not cause to change card type bottle in-process part and lose or damage.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A bolus mechanism, comprising:

the propelling mechanism is provided with a guide groove and is used for pushing the cassette bottle and the needle head so that the needle head can be inserted into an injection object to a certain depth;

the injection mechanism is arranged on the propelling mechanism, can reciprocate under the driving of the propelling mechanism, is used for pushing the piston of the card bottle to move so as to inject liquid medicine into an injection object, and comprises an injection driving device and a piston push rod, wherein the head end of the piston push rod is connected with the injection driving device, and the tail end of the piston push rod is used for pushing the piston of the card bottle;

the piston push rod is an elastic rod and penetrates through the guide groove, and the head end of the piston push rod can reciprocate in a direction different from the movement direction of the tail end of the piston rod under the driving of the injection driving device.

2. The bolus mechanism of claim 1, wherein the propulsion mechanism comprises a propulsion driving device and a bolus support connected to the propulsion driving device, the bolus support is driven by the propulsion driving device to reciprocate, the injection driving device is disposed on the bolus support, and the guide groove is disposed on the bolus support.

3. The bolus mechanism of claim 2, wherein the push driving device comprises a first motor, a first transmission device and a first screw pair, an output shaft of the first motor is connected to a screw of the first screw pair through the first transmission device, and the bolus stent is connected to a nut of the first screw pair.

4. The bolus mechanism of claim 1, wherein the injection driving device comprises a second motor, a second transmission device and a second screw pair, an output shaft of the second motor is connected to a screw of the second screw pair through the second transmission device, and a head end of the plunger rod is connected to a nut of the second screw pair.

5. The bolus mechanism of claim 1 wherein the guide channel is a U-shaped guide channel.

6. An electronic injection pen, comprising:

a housing;

a bolus mechanism according to any one of claims 1 to 5 disposed within the housing;

the bin body is arranged on the propelling mechanism, a cavity capable of containing a cassette bottle is formed in the bin body, openings communicated with the cavity are formed in the upper end and the lower end of the bin body, and a needle head can be installed at the lower end of the bin body;

the control panel is used for controlling the propulsion mechanism and the injection mechanism to work;

the operation panel is arranged on the shell, is electrically connected with the control panel and is used for inputting operation information and displaying state information;

and the storage battery is arranged in the shell and used for providing electric energy for the propelling mechanism, the injection mechanism, the control panel and the operation panel.

7. The electronic injection pen of claim 6, wherein the cartridge body has one end rotationally coupled to the advancing mechanism.

8. The electronic injection pen of claim 7, further comprising:

the buckle mechanism comprises a female buckle part arranged on the bin body and a male buckle part arranged on the pushing mechanism, and the male buckle part can be clamped with the female buckle part to lock the bin body in the shell;

the first elastic piece is arranged on the bin body at one end and on the pushing mechanism at the other end and used for driving the bin body to rotate for a certain angle relative to the shell so that one end of the bin body extends out of the shell;

the releasing mechanism is arranged on the shell and used for enabling the male buckle part to release the female buckle part;

when the male buckle part is clamped with the female buckle part, elastic potential energy is accumulated by the elastic component, and when the male buckle part releases the female buckle part, the elastic potential energy is released by the elastic component.

9. The electronic injection pen of claim 8, further comprising an ejection protection structure disposed on the housing, wherein the ejection protection structure locks the release mechanism when the advancing mechanism is not in the safe position, such that the release mechanism is disabled.

10. The electronic injection pen of claim 6, wherein a skin sensor is disposed at a lower end, and the skin sensor is electrically connected to the control board.