阅读说明：本技术 畜牧用电动无针注射器 (Electric needleless injector for livestock raising ) 是由 石永杰 李辉 唐晓琼 李宁 邢艳艳 王须亮 栗朝亮 王喜庆 赵晓军 裴彦方 王艳 于 2021-02-06 设计创作，主要内容包括：本发明公开了一种畜牧用电动无针注射器,包括壳体、电源和相应按键,壳体内自上而下依次有旋转驱动机构、锁放旋驱机构、主推力弹簧和锁推机构,锁放旋驱机构包括锁放旋驱部件和自膨胀螺套,以及电磁约束部件和中心螺杆,锁放旋驱部件包括一个圆盘体,圆盘体通过润滑部件套装于壳体内能自由转动,该圆盘体的内侧设置镂空的扁圆轨道,该圆盘体的上侧有向上突出的连接管,连接管直接地或间接地与所述旋转驱动机构的旋转输出端连接；本发明不需要单独加压的人工操作,加压过程通过电控完成,无需耗费体力,实现吸药和加压同步,操作简单,使用方便高效,注射过程轻便安全。(The invention discloses an electric needleless injector for livestock, which comprises a shell, a power supply and corresponding keys, wherein a rotary driving mechanism, a locking and releasing rotary driving mechanism, a main thrust spring and a locking and pushing mechanism are sequentially arranged in the shell from top to bottom; the invention does not need manual operation of independent pressurization, the pressurization process is completed through electric control, physical strength is not consumed, the synchronization of medicine suction and pressurization is realized, the operation is simple, the use is convenient and efficient, and the injection process is light and safe.)

1. An electric needleless injector for livestock comprises a shell, a power supply and corresponding keys, it is characterized in that a rotary driving mechanism, a locking and releasing rotary driving mechanism, a main thrust spring and a locking and pushing mechanism are sequentially arranged in the shell from top to bottom, the driving mechanism is used for providing rotary driving power, the locking and unlocking rotary driving mechanism comprises a locking and unlocking rotary driving part (6) and a self-expansion threaded sleeve (7), the locking and releasing rotary driving component (6) comprises a disc body (61), the disc body (61) is sleeved in the shell through a lubricating component and can freely rotate, the inner side of the disc body (61) is provided with a hollowed flat circular track (62), the upper side of the disc body (61) is provided with a connecting pipe (63) which protrudes upwards, and the connecting pipe (63) is directly or indirectly connected with the rotary output end of the rotary driving mechanism; the self-expansion thread insert (7) comprises two symmetrical semicircular thread insert (71) assemblies, one side of each semicircular thread insert (71) is an arc surface, the other side of each semicircular thread insert is a plane, a semicircular thread section (72) is arranged in the center of the plane, an arc back caulking groove (73) is arranged in the middle of the arc surface, a guide rod (74) and a guide groove (76) are respectively arranged in the plane areas on the left side and the right side of the semicircular thread section (72), when the two semicircular thread inserts (71) are buckled with each other, the guide rod (74) is inserted into the guide grooves (76) in a matching manner, an elastic component which enables the two semicircular thread inserts (71) to be naturally separated is adopted, the back caulking grooves (73) on the rear sides of the two symmetrical semicircular thread inserts (71) are respectively sleeved on the flat circular track (62) of the locking and rotating driving component (6), and the distance between the two semicircular thread inserts (71) can be changed after the flat circular track (62) rotates along with the locking and rotating driving component (6), namely, the locking and the releasing of the two semicircular ring thread sleeves (71) are realized; the combined two semicircular screw sleeves (71), two semicircular arc thread sections (72) at the inner sides of the two semicircular screw sleeves are combined to form an annular combined screw nut section, the combined screw nut section is sleeved outside the central screw rod (1) in a matching way, the electromagnetic restraint part is fixed in the shell and is positioned under the self-expansion screw sleeve (7), the electromagnetic restraint part is used for limiting the rotation of the two semicircular screw sleeves (71), the bottom of the central screw rod (1) is fixed with the locking and pushing mechanism, the main thrust spring (2) is connected between the inner wall of the shell and the locking and pushing mechanism, the front end of the locking and pushing mechanism is provided with a clamping and fixing structure for clamping the end part of the medicine tube push rod, the shell is respectively provided with a main switch, a switch for controlling the driving mechanism to rotate in the forward direction and a switch for controlling the driving mechanism to rotate in the reverse direction, when the self-expansion screw sleeve (7) rotates and drives the central screw rod (1) to, the central screw rod (1) pulls the locking and pushing mechanism to overcome the elastic force of the main thrust spring (2) to move upwards, the oblate track (62) rotates reversely to enable the two semicircular screw sleeves (71) of the self-expansion screw sleeve (7) to be scattered, the self-expansion screw sleeve (7) releases the central screw rod (1), and the main thrust spring (2) drives the locking and pushing mechanism to pop out instantly.

2. The electric needleless injector for animal husbandry as claimed in claim 1, wherein when the rotation of the two semicircular screw bosses (71) is restricted by the electromagnetic restriction member, the electromagnet (19) is used, and when the electromagnet (19) is energized, the two semicircular screw bosses (71) are attracted at the same time, so that the two semicircular screw bosses (71) generate rotation retardation or release, in such a manner that the two semicircular screw bosses (71) are made of stainless steel or magnetic material.

3. Electric needleless injector for animal husbandry according to claim 2, characterized in that the attraction of the two semi-circular threaded sleeves (71) by means of the electromagnet (19) is direct.

4. The electric needleless injector for animal husbandry as claimed in claim 2, wherein the attraction of the two semicircular screw inserts (71) by the electromagnet (19) is indirect attraction, a fixed housing is provided outside the electromagnet, the electromagnet is located in the fixed housing and can slide axially and reset but can not rotate, and when the electromagnet is energized, the electromagnet is ejected by attraction with the two semicircular screw inserts (71) and is directly attracted below the two semicircular screw inserts (71) to form a restriction.

5. The electric needleless injector for animal husbandry according to claim 1, wherein when the rotation of the two semicircular screw inserts (71) is restricted by the electromagnetic restriction member, the electromagnetic restriction member employs an elastic ejecting member installed in the fixing base, the elastic ejecting member is ejected and pressed against the lower surfaces of the two semicircular screw inserts (71) to form a restriction in a natural state, but when the electromagnet is energized, the elastic ejecting member is pulled back to release the two semicircular screw inserts (71), in which case the two semicircular screw inserts (71) are made of a non-metal non-magnetic material.

6. The electric needleless injector for animal husbandry as claimed in claim 1, wherein the upper end of the connecting tube (63) is drivingly connected to the rotating shaft of the driving motor (9) through a rotary connecting seat (10) for stability, and the rotary connecting seat (10) is mounted on the inner wall of the housing or the inner wall of the driving mechanism fixing seat through a lubricating member.

7. Electric needleless injector for animal husbandry according to claim 1, characterized in that the push release switch (13) and the suction switch (14) are used to control the reverse rotation and the forward rotation, respectively, of the drive motor (9).

8. An electric needleless injector for animal husbandry as claimed in claim 1, wherein the power source used is an external power source, or a battery or dry cell battery placed in a suitable position in the housing, or an adapter leading to an external power source.

9. The electric needleless injector for animal husbandry as claimed in claim 1, wherein a driving motor having a hollow rotating shaft is used to allow the central screw to pass through the central hole of the rotating shaft and out of the top of the housing, and a milled plane and a normal-shot scale are provided on the exposed screw section, or a housing is sleeved and a scale is provided on the housing, so that the stroke of the central screw can be determined according to the amount of the central screw exposed out of the housing, and the medicine suction amount and the pressurization amount can be determined.

10. The electric needleless injector for animal husbandry as claimed in claim 1, wherein the elastic member is provided with a thrust spring (79) at the outer side of each guide rod (74) to separate the two semicircular screw sleeves (71) naturally.

Technical Field

The invention belongs to the technical field of injection devices for livestock raising, and particularly relates to an electric needleless injector for livestock raising.

Background

The needle-free injector does not need a needle, but is an apparatus which applies high pressure to liquid medicine, and uses instantaneous high pressure generated by a power source to enable the medicine (liquid or freeze-dried powder) in the injector to form a high-speed and high-pressure jet flow (the flow rate is generally larger than 100 m/s) through a nozzle so as to enable the medicine to be injected to the subcutaneous part of a patient through a micropore at the end part, so that the medicine penetrates through the outer layer of the skin to the layers of the subcutaneous, intradermal and the like so as to release the medicine effect.

Most of the traditional injectors adopt a structure with a needle, when the needle is used for injection, the injector can cause trauma to the body of livestock raising, so that the livestock raising feels painful, therefore, the livestock raising can resist and even fear the mind to the injection, the trauma of the injection can cause pathogenic bacteria infection, and the injector can cause great harm to the body of the livestock raising, and even endanger the life in serious cases.

Most of the existing needleless injectors are developed and produced for human injection, the cost of the injectors is over 5000 yuan, and accessories are hundreds of yuan. And the operation is troublesome when in use, and the injection is not suitable for needleless injection in the field of animal husbandry.

Disclosure of Invention

The invention provides an electric needleless injector for livestock breeding, aiming at the defects and problems of needle injection commonly adopted by the existing livestock breeding injection, and the problems of troublesome use and operation and high cost when the existing mature needleless injector is applied to livestock breeding because the existing needle-free injector is only suitable for human use.

The invention adopts the technical scheme that the electric needleless injector for livestock comprises a shell, a power supply and corresponding keys, wherein a rotary driving mechanism, a locking and releasing rotary driving mechanism, a main thrust spring and a locking and pushing mechanism are sequentially arranged in the shell from top to bottom; the self-expansion screw sleeve comprises two symmetrical semicircular screw sleeve assemblies, one side of each semicircular screw sleeve is a cambered surface, the other side of each semicircular screw sleeve is a plane, a semicircular screw thread section is arranged in the center of the plane, an arc back embedding groove is arranged in the middle of the cambered surface, a guide rod and a guide groove are respectively arranged in the plane areas on the left side and the right side of the semicircular screw thread section, when the two semicircular screw sleeves are buckled with each other, the guide rods are inserted into the guide grooves of each other in a matching manner, an elastic component for naturally separating the two semicircular screw sleeves is adopted, the back embedding grooves on the rear sides of the two symmetrical semicircular screw sleeves are respectively sleeved on the oblate rail of the locking and releasing rotary driving component, and after the oblate rail rotates along with the locking and releasing rotary driving component, the distance between the two semicircular screw sleeves can be changed, so that the locking and releasing of the two semicircular screw sleeves are; the combined two semicircular screw sleeves, two semicircular arc thread sections at the inner sides of the combined two semicircular screw sleeves are combined to form an annular combined screw nut section, the combined screw nut section is sleeved at the outer side of the central screw rod in a matching way, the electromagnetic restraint part is fixed in the shell and is positioned under the self-expansion screw sleeve, the electromagnetic restraint part is used for limiting the rotation of the two semicircular screw sleeves, the bottom of the central screw rod is fixed with the locking and pushing mechanism, the main thrust spring is connected between the inner wall of the shell and the locking and pushing mechanism, the front end of the locking and pushing mechanism is provided with a clamping and fixing structure used for clamping the end part of the medicine tube push rod, the corresponding positions on the shell are respectively provided with a main switch, a switch used for controlling the driving mechanism to rotate in the forward direction and a switch used for controlling the driving mechanism to rotate in the reverse direction, and under the condition that the self-expansion screw sleeve rotates and drives the central screw, and the oblate orbit rotates reversely to enable the two semicircular screw sleeves of the self-expansion screw sleeve to be scattered, the self-expansion screw sleeve releases the central screw rod, and the main thrust spring drives the locking and pushing mechanism to pop out instantly.

When the rotation of the two semicircular screw sleeves is limited by the electromagnetic constraint component, the electromagnet is adopted, after the electromagnet is electrified, the two semicircular screw sleeves are attracted simultaneously, so that the two semicircular screw sleeves generate rotation delay or release, and the two semicircular screw sleeves are made of stainless steel or magnet materials.

The two semicircular screw sleeves are attracted directly by the electromagnet.

The two semicircular screw sleeves are attracted indirectly through the electromagnet, the fixed outer sleeve is arranged on the outer side of the electromagnet, the electromagnet is located in the fixed outer sleeve and can axially slide and reset but cannot rotate, and when the electromagnet is electrified, the electromagnet is popped up due to attraction with the two semicircular screw sleeves and is directly attracted below the two semicircular screw sleeves to form restraint.

When the rotation of the two semicircular screw sleeves is limited by the electromagnetic constraint component, the electromagnetic constraint component adopts an elastic ejection component which is arranged in the fixed seat, the elastic ejection component is ejected out in a natural state and is pressed on the lower surfaces of the two semicircular screw sleeves to form constraint, but after the electromagnet is electrified, the elastic ejection component can be pulled back to release the two semicircular screw sleeves, and under the condition of the mode, the two semicircular screw sleeves are made of non-metal non-magnetic materials.

The upper end of the connecting pipe is in transmission connection with a rotating shaft of the driving motor through a rotary connecting seat so as to keep stability, and the rotary connecting seat is arranged on the inner wall of the shell or the inner wall of the driving mechanism fixing seat through a lubricating part.

The push release switch and the suction switch are respectively used for controlling the reverse rotation and the forward rotation of the driving motor.

The power supply is an external power supply, or a storage battery or a dry battery which is arranged at a proper position in the shell, or an external power adapter through guiding.

A driving motor with a hollow rotating shaft is adopted, a central screw rod is allowed to penetrate through a central hole of the rotating shaft and penetrate out of the top of the shell, a milling plane and orthographic scales are arranged on the exposed screw rod section, or an outer sleeve is sleeved and scales are arranged on the outer sleeve. Therefore, the stroke of the central screw rod is determined according to the quantity value of the central screw rod exposed out of the shell, so that the medicine suction quantity and the pressurization quantity can be determined.

The elastic component is characterized in that a thrust spring is sleeved outside each guide rod to enable the two semicircular screw sleeves to be naturally separated.

The invention has the beneficial effects that: the invention does not need manual operation of independent pressurization, the pressurization process is completed through electric control, physical strength is not consumed, the synchronization of medicine suction and pressurization is realized, the operation is simple, the use is convenient and efficient, and the injection process is light and safe.

The invention improves the safety of the drug suction pressurization process and the safety of the injection process by arranging the double keys for combined use. The setting numerical value or the operation medicine suction pressurization degree can be intuitively and accurately grasped through the display, and the medicine application precision is improved.

The syringe is placed in the reset state, i.e., the central screw is held in the extended state and the lock and push mechanism is at the bottom. Usually, the controller automatically resets after each use, and a hidden reset key can be arranged to realize automatic reset. The front end of the medicine tube is connected with a corresponding medicine bottle such as an insulin medicine bottle through a medicine taking connector (adapter), and the neck of a push rod at the rear end of the medicine tube is inserted into a locking and pushing mechanism. And simultaneously pressing the main switch and the suction switch to realize the suction and pressurization processes.

After the slide block is initially lifted upwards by the central screw rod, each outer conical surface slides upwards along the inner conical surface and enters the inner wall of the lower shell, so that each elastic body is compressed, and each bulge is clamped and fixed in the neck concave area of the medicine tube push rod to realize locking. According to the set value or the manual pressing time control, the medicine suction amount and the pressurization degree are observed through the display screen. When in injection, the injector is vertically and tightly attached to the injection part by adopting a relaxed sitting posture. The main switch is pressed by the forefinger, the push release switch is pressed by the thumb, and the injection is finished.

Drawings

Fig. 1 is an external structural view of an embodiment of the present invention.

Fig. 2 is an internal structural view of fig. 1 in fig. 2.

Fig. 3 is one of sectional structural views a-a in fig. 2.

FIG. 4 is a second structural view of the section A-A in FIG. 2.

Fig. 5 is a sectional view of B-B in fig. 3.

Fig. 6 is a sectional view of C-C in fig. 4.

Fig. 7 is a front view of the disk body of the lock pushing and rotating member.

Fig. 8 is one of the two half-circle thread insert combinations.

Fig. 9 is a second schematic view of the combination of two semicircular screw sleeves.

FIG. 10 is a schematic view of the installation of the locking and unlocking screw driver and the self-expanding threaded sleeve.

Fig. 11 is a top view of fig. 10.

Fig. 12 is a cross-sectional view of the locking and unlocking mechanism.

Fig. 13 is a schematic view of the locking mechanism of fig. 12 from a different angle.

FIG. 14 is a control relationship diagram of an embodiment.

Fig. 15 is a control relationship diagram of another embodiment.

Fig. 16 is an external structural view of another embodiment of the present invention.

Fig. 17 is an internal structural view of fig. 16.

Fig. 18 is a circuit diagram of a circuit employing relay driving.

Fig. 19 is a diagram of a controller controlled relay.

Reference numbers in the figures: the self-expansion type self-locking and pushing device comprises a central screw 1, a main thrust spring 2, a lower shell 3, a locking and pushing mechanism 4, a sliding block 41, a fixed seat 42, a matching gap 43, an elastic body 44, a clamping groove 45, a protruding portion 46, an outer conical surface 47, a convex ridge portion 48, an inner conical surface 49, an upper shell 5, a locking and releasing rotary driving component 6, a disk body 61, a flat circular track 62, a connecting pipe 63, a self-expansion screw sleeve 7, a semi-circular screw sleeve 71, a semi-circular-arc threaded section 72, a back embedded groove 73, a guide rod 74, a cushion block 75, a guide groove 76, a reverse bump 77, a reverse groove 78, a thrust spring 79, a motor seat 8, a driving motor 9, a rotary connecting seat 10, a rear cover 11, a main switch 12, a pushing and releasing switch 13, a suction switch 14, a display screen 15, an external power supply 16, a medicine tube 17.

Detailed Description

Example 1: an electric needleless injector for livestock comprises a casing, as shown in figure 1, an upper casing 5, a lower casing 3 and a rear cover 11, wherein the parts are sealed and buckled together. And a main switch 12, a push release switch 13 and a suction switch 14 are respectively arranged at corresponding positions on the shell, wherein the main switch 12 and the push release switch 13 are in a group, the main switch 12 and the push release switch 13 can be pressed down simultaneously to control the syringe to perform a suction function, and the main switch 12 and the suction switch 14 are in a group, and the main switch 12 and the suction switch 14 can be pressed down simultaneously to control the syringe to perform an injection function. The switches are positioned so as to facilitate the operation, for example, the main switch 12 and the push release switch 13 can be easily operated during the aspiration operation, and the main switch 12 and the aspiration switch 14 can be easily operated during the injection operation. The number of master switches is at least one and may be two master switches in parallel to optimize control in different operating modes, while taking into account the layout of the positions where the push release switch 13 and the suction switch 14 cannot be depressed simultaneously.

As can be seen from fig. 2, the main parts of the syringe are a rotary driving mechanism, a locking and unlocking rotary driving mechanism, a main thrust spring, a locking and pushing mechanism and the like which are arranged in the shell from top to bottom in sequence.

The locking and releasing rotary driving mechanism comprises a locking and releasing rotary driving part 6, a self-expansion threaded sleeve 7, an electromagnetic constraint part, a central screw rod 1 and the like.

Specifically, as shown in fig. 7 and 10, the locking and unlocking rotation driving member 6 includes a circular disk body 61, and a hollowed-out oblate track 62, such as an elliptical track, is provided on the inner side of the circular disk body 61. The disc body 61 has a connection pipe 63 protruding upward on the upper side. As can be seen from fig. 2, the edge of the circular disk body 61 has a shallow recessed platform for mounting a lubricating member such as a bearing or a bushing, which is simultaneously fitted over the edge of a partition 22 in the middle of the housing, so that the whole of the locking and rotating member 6 can rotate. As can also be seen from fig. 2, the rotary driving mechanism is a driving motor 9 (stepping motor) mounted through a motor base 8, the upper end of the connecting pipe 63 is in transmission connection with the rotating shaft of the driving motor 9 through a rotary connecting base 10, and in order to maintain stability, the rotary connecting base 10 is also mounted with a lubricating component such as a bearing or a shaft sleeve.

Based on this, can control the motor through controlling corresponding button and rotate, and then control locking and releasing and revolve drive part 6 and rotate.

The circuit control of the injector can adopt one of the graph 14 or the graph 15, a main switch 12, a pushing release switch 13 and a suction switch 14 are respectively connected with the signal input end of a controller, and the control output end of the controller is connected with a driving motor 9. When the control principle of fig. 14 is adopted, the rotation degree of the driving motor is controlled or the axial drawing-in degree of the central screw rod is controlled, corresponding numerical values can be input by arranging an add-subtract keyboard on the shell, and the numerical values are displayed through the display screen 15. In this case, there are two implementation forms, one of which is: this display is only used for the extraction setting, when suction or pushing is required, it is still necessary to control the main switch 12 and the suction switch 14 to be pressed; the second step is as follows: the suction switch is not arranged, and the suction work of the motor is controlled while the keyboard input is increased or decreased. When the control principle of fig. 15 is adopted, no addition or subtraction setting or control is performed, the position sensor is installed in the shell (for example, the lower shell 3) to monitor the axial pulling degree of the central screw 1, and the progress is displayed in a numerical mode through the display screen through the controller, so that the pumped medicine amount is controlled conveniently.

As shown in fig. 8 and 9, the self-expanding screw insert 7 includes two symmetrical semicircular screw insert 71 assemblies, one side of each semicircular screw insert 71 is a cambered surface, the other side is a plane, a semicircular thread section 72 is arranged in the center of the plane, and an arc back caulking groove 73 is arranged in the middle of the cambered surface. The plane areas at two sides of the semi-circular thread section 72 are respectively provided with a guide rod 74 and a guide groove 76, and when the two semi-circular thread sleeves 71 are buckled, the guide rods 74 are inserted into the guide grooves 76 in a matching way. Meanwhile, a thrust spring 79 is sleeved on the outer side of each guide rod 74, and the two semicircular screw sleeves 71 are kept in a separated state in a natural state by the thrust spring 79, so that the central screw rod can be smoothly released.

The back embedding grooves 73 at the back sides of the two semicircular screw sleeves 71 are respectively sleeved in the oblate rails 62 of the locking and unlocking rotary driving part 6 as shown in fig. 11. When the oblate rail 62 rotates along with the locking and releasing rotary driving component 6, the distance between the two semicircular screw sleeves 71 can be changed, namely, the two semicircular screw sleeves 71 are locked and released, as shown in fig. 3 and 4, when the circular disc body 61 rotates to realize that the oblate rail 62 is changed from the transverse direction to the vertical direction, the two expanded semicircular screw sleeves 71 are pressed to be in a gathering state.

The two semicircular arc thread sections 72 on the inner sides of the two combined semicircular ring thread sleeves 71 are combined to form an annular combined nut section, the combined nut section is sleeved on the outer side of the central screw rod 1 in a matched mode, as shown in fig. 5, the two semicircular arc thread sections 72 are separated from each other in the expansion state of the two semicircular ring thread sleeves 71 and cannot contact the central screw rod 1, as shown in fig. 6, after the two semicircular ring thread sleeves 71 are closed by compression, the annular combined nut section with the semicircular arc thread sections 72 can be sleeved on the outer end of the central screw rod 1, and when the self-expansion nut 7 is rotated again, the central screw rod 1 can be driven to move upwards along the axial direction.

The cooperation of the locking and unlocking rotation driving part 6 and the self-expanding screw sleeve 7 needs to be controlled by an electromagnetic constraint part so as to realize the rotation or release of the self-expanding screw sleeve 7 driven by the locking and unlocking rotation driving part 6.

Specifically, as shown in fig. 2 and 5, an electromagnetic restraint member for restricting the rotation of the two semicircular screw bosses 71 is fixed in the housing and located directly below the self-expanding screw boss 7.

Regarding the application of the electromagnetic restricting member, when it is applied to restrict or limit the rotation of the two semicircular screw bosses 71, the present embodiment employs the electromagnet 19 as shown in fig. 2. When the electromagnet 19 is electrified, the two half-ring thread inserts 71 are attracted at the same time, so that the two half-ring thread inserts 71 generate rotation delay or release. One convenient control method is direct attraction, for example, combining a part or all of the two half-circle thread inserts 71 with a permanent magnet, energizing an electromagnet and then directly attracting the corresponding two half-circle thread inserts 71 to form a delaying or restraining or limiting relationship, so that after the oblate orbit 62 is sleeved outside the two half-circle thread inserts 71 and compressed, the electromagnet is released through a controller or a time delay.

The front end of the locking and pushing mechanism is provided with a clamping structure used for clamping the end part of the push rod of the medicine tube. Specifically, referring to fig. 12 and 13, the locking and pushing mechanism 4 includes a sliding block 41 fittingly sleeved in the lower housing 6, the center of the upper portion of the sliding block 41 is fixed with the central screw rod 1 through a fixing seat 42, a plurality of elastic bodies 44 extend downwards from the lower portion of the sliding block 41, a fit gap 43 is provided between adjacent elastic bodies 44, a closed area defined by the plurality of elastic bodies 44 is a slot 45 for mounting the medicine tube pushing rod, inner walls of the plurality of elastic bodies 44 are respectively provided with a protruding portion 46 for clamping a neck portion of the medicine tube pushing rod, outer tapered surfaces 47 are respectively provided on outer sides of the ends of the plurality of elastic bodies 44, meanwhile, a raised ridge portion 48 with a diameter being enlarged is provided below the lower housing, inner walls of the raised ridge portion 48 are provided with inner tapered surfaces 49, the outer tapered surfaces 47 are fittingly sleeved with the inner tapered surfaces 49, after the sliding block 41 is lifted upwards on the central screw rod 1, each outer tapered surface 47 slides upwards along the inner tapered surfaces 49, so that the elastic bodies 44 are compressed and the convex parts 46 are clamped and fixed in the neck concave area of the medicine tube push rod to realize locking.

After the two semicircular screw sleeves 71 are buckled, the combined nut section is sleeved on the central screw rod 1 in a matching manner, and when the rotary driving mechanism drives the locking and unlocking rotary driving mechanism to rotate, the self-expansion screw sleeve 7 can be driven to rotate so as to drive the central screw rod 1 to be pulled upwards for medicine taking. When the electromagnetic restraint component controls the self-expansion threaded sleeve 7 to enable the two semi-circular threaded sleeves 71 to be scattered, the self-expansion threaded sleeve 7 releases the central screw 1, and the main thrust spring 2 instantly drives the locking and pushing mechanism to pop out.

In use, the present embodiment places the syringe in the reset state, i.e. with the central screw 1 in the extended state and the lock and push mechanism 4 at the bottom. Usually, the controller automatically resets after each use, and a hidden reset key can be arranged to realize automatic reset. The front end of the medicine tube is connected with a corresponding medicine bottle through a medicine taking connector (adapter), and the neck of a push rod at the rear end of the medicine tube is inserted into the locking and pushing mechanism 4. The master switch 12 and the suction switch 14 are simultaneously depressed, simultaneously effecting suction and pressurization processes. After the slider 41 is initially pulled upward by the central screw 1, the outer tapered surfaces 47 slide upward along the inner tapered surfaces 49 and enter the inner wall of the lower housing 6, so that the elastic bodies 44 are compressed, and the protrusions 46 are clamped and fixed in the neck recessed area of the medicine tube pushing rod to realize locking. According to the set value or the manual pressing time control, the medicine suction amount and the pressurization degree are observed through the display screen. When in injection, the injector is vertically and tightly attached to the injection part by adopting a relaxed sitting posture. The master switch 12 is pressed by the index finger and the push release switch 13 is pressed by the thumb, completing the injection. The invention does not need manual operation of independent pressurization, the pressurization process is completed through electric control, physical power consumption is not needed, the synchronization of medicine suction and pressurization is realized, the operation is simple, and the injection process is light and safe. The invention improves the safety of the drug suction pressurization process and the safety of the injection process by arranging the double keys for combined use. The setting numerical value or the operation medicine suction pressurization degree can be intuitively and accurately grasped through the display, and the medicine taking precision is obviously improved. The power source used in this embodiment may be an external power source 16 as shown in fig. 1, or may be a battery or dry cell battery placed in a suitable location within the housing, or in the form of an adapter leading to an external power source.

Example 2: on the basis of embodiment 1, when the electromagnetic restriction component is applied to restrict or limit the rotation of the two semicircular screw bosses 71, the present embodiment uses the electromagnet 19 as shown in fig. 2. When the electromagnet 19 is electrified, the two half-ring thread inserts 71 are attracted at the same time, so that the two half-ring thread inserts 71 generate rotation delay or release. The outer side of the electromagnet is provided with a fixed outer sleeve, the electromagnet is positioned in the fixed outer sleeve and can axially slide and reset (can reset through an elastic sheet) but cannot rotate, when the electromagnet is electrified, the electromagnet pops up due to attraction with the two semicircular screw sleeves 71 and is directly attracted below the two semicircular screw sleeves 71 to form restraint, and the two semicircular screw sleeves 71 are made of stainless steel or magnetic materials in the mode.

Example 3: in addition to embodiment 1, when the electromagnetic restraint member is applied to restrain or restrict the rotation of the two semicircular screw bosses 71, the electromagnetic restraint member is an elastic ejecting member that is installed in the fixing base and is ejected in a natural state to press the lower surfaces of the two semicircular screw bosses 71 to restrain the rotation, but when the electromagnet is energized, the elastic ejecting member can be pulled back to release the two semicircular screw bosses 71, and in this mode, the two semicircular screw bosses 71 are made of a non-metal non-magnetic material.

Example 4: on the basis of embodiment 1, the push release switch 13 and the suction switch 14 are used to control the reverse rotation and the forward rotation of the drive motor 9, respectively. The self-expansion screw sleeve 7 is compressed and then sleeved in the oblate rail 62 of the locking and releasing rotary driving part 6, and the oblate rail 62 is matched and clamped in the back embedding groove 73 of each semicircular screw sleeve 71, so that when the locking and releasing rotary driving part 6 is driven by the driving motor to rotate along the positive direction, the oblate rail 62 rotates to overcome a thrust spring (weak force spring) and then gradually oppress the two semicircular screw sleeves 71 to enable the two semicircular screw sleeves to contract inwards, when the locking and releasing rotary driving part 6 is driven by the driving motor to rotate along the reverse direction, the oblate rail 62 rotates to release the two semicircular screw sleeves 71, and the two semicircular screw sleeves 71 expand to release the central screw rod to realize instant release injection.

Example 5: on the basis of embodiment 1, the invention can also adopt a mode of controlling the motor and the electromagnet by controlling the micro relay as shown in fig. 18 and fig. 19.

Example 6: on the basis of embodiment 1, the main part adopts the structure and the structure which are basically the same as those of embodiment 1, and the improvement is that the material of the locking and releasing rotary driving component 6 is changed into a transparent material so as to improve the perspective function, at the moment, a transverse indicating sheet 20 is fixed at the top end of the central screw rod 1 and is coated with a clear color, meanwhile, a viewing window 18 is arranged on the side wall of the shell, and the edge of the viewing window is provided with scale values. The position of the indicator piece 20 can be seen through the observation window, so that the stroke of the central screw, that is, the medicine suction amount and the pressurization amount can be determined. This embodiment replaces the design of the display in embodiment 1 by the combination of the viewing window and the indicator piece.

Example 7: on the basis of embodiment 1, a rotary connecting base 10 is mounted at the upper end of the connecting pipe 63, and the rotary connecting base 10 is mounted with a lubricating component such as a bearing or a shaft sleeve sleeved in a shell. At this time, the driving motor drives the rotary connecting seat 10 to rotate in a main and auxiliary gear mode from the side surface, so that the driving motor is not positioned in the center of the top of the tool, the rotary connecting seat 10 is designed to contain a center hole and allow a center screw to pass through the center hole and penetrate the top of the shell, a milling plane and an orthographic scale are arranged on an exposed screw section, or an outer sleeve is sleeved and scales are arranged on the outer sleeve. Therefore, the stroke of the central screw rod is determined according to the quantity value of the central screw rod exposed out of the shell, namely, the medicine suction quantity and the pressurization quantity can be determined.

Example 8: on the basis of the embodiment 1, a driving motor with a hollow rotating shaft is adopted, a central screw rod is allowed to penetrate through a central hole of the rotating shaft and penetrate out of the top of the shell, a milling plane is arranged on an exposed screw rod section, and the scale is orthographically arranged, or an outer sleeve is sleeved and the scale is arranged on the outer sleeve. Therefore, the stroke of the central screw rod is determined according to the quantity value of the central screw rod exposed out of the shell, namely, the medicine suction quantity and the pressurization quantity can be determined.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. For example, an end cap is arranged at the front end of the needle-free injector body to prevent pollution, and a pressure sensor is additionally arranged at the part of the locking and pushing mechanism 4 to determine the operation limit and reset. And adding corresponding sensors at the gas part in the shell to improve the sensitivity. For example, in the case of a modification of the drive mechanism, a transmission gear is used to increase the output torque and to reduce the size of the drive motor. For example, the elastic member for naturally separating the two semicircular screw bosses 71 may be formed by providing deep grooves at the ends or the middle portions of the two semicircular screw bosses 71, the deep grooves having a depth lower than that of the nut grooves, embedding annular steel rings that are not closed in the deep grooves, and ejecting the two semicircular screw bosses 71 using the steel rings, or other equivalent elastic members. And other structures for deforming the housing main body to add auxiliary components such as a power supply. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.