WO2022141930A1

WO2022141930A1 - Portable injection device for sampling and sample adding

Info

Publication number: WO2022141930A1
Application number: PCT/CN2021/086399
Authority: WO
Inventors: 席秋子; 邱华星
Original assignee: 苏州鼎实医疗科技有限公司
Priority date: 2020-12-29
Filing date: 2021-04-12
Publication date: 2022-07-07
Also published as: CN112844086B; CN112844086A

Abstract

A portable injection device for sampling and sample adding, comprising: a shell (2), the interior of the shell (2) being hollow, and the top of the shell (2) being open to form a first cavity (21); a suction mechanism arranged in the first cavity (21); and a guide portion used for guiding a reagent and arranged at the bottom of the shell (2), wherein the suction mechanism comprises a flow-guiding member (1) and a gland (5), the flow-guiding member (1) is internally provided with a hollow portion, the gland (5) comprises a piston rod (51) connected to the flow-guiding member (1) in a sliding manner, the piston rod (51) extends into the hollow portion of the flow-guiding member (1), so that a closed liquid mixing cavity (111) is formed in the hollow portion, and the guide portion is in communication with the liquid mixing cavity (111). Carrying convenience and operation accuracy of a user are effectively improved, and the device is convenient to use and has a simple structure.

Description

A portable injection device for sampling and adding samples

technical field

The invention belongs to the field of medical instruments, in particular to a portable injection device for sampling and adding samples.

Background technique

In the field of medical devices, especially in fluorescent immunoassays, it is always well known to use a pipette to mix various reagents into a mixture for analysis. However, the inventor found that there are at least the following problems in the existing sampling and adding process:

First of all, in the traditional collection process, a pipette gun is required to collect different reagents and then mix the reagents in a container, and then take out the mixed solution and put it into the analytical instrument to perform immunological analysis. The collection process requires multiple liquids to be collected one by one. This results in a long acquisition time, which limits the efficiency of fluorescence immunoassay. At the same time, because immunoassays require the use of multiple supplies such as pipettes, buffer reagents, pipette tips, and mixing containers, outdoor, or In special scenarios, there are limitations such as inconvenience to carry and environmental requirements, and there are major design defects.

In view of this, it is necessary to develop a portable injection device for sampling and adding to solve the above problems.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the main purpose of the present invention is to provide a portable injection device for sampling and adding samples, which integrates the supplies required for the experiment, simplifies the operation steps, and facilitates the users.

Another object of the present invention is to provide a portable injection device for sampling and adding samples, which can absorb and mix a quantitative reagent by locking the gland to limit the stretching of the liquid mixing chamber to a fixed volume.

In order to achieve the above objects and other advantages according to the present invention, a portable injection device for sampling and adding samples is provided, comprising:

a shell, the interior of which is hollow and the top of which is opened to form a first cavity;

a suction mechanism disposed within the first cavity; and

a guide for the diversion reagent, which is provided at the bottom of the housing;

Wherein, the suction mechanism includes a drainage member and a pressure cover, the drainage member is provided with a hollow portion inside, and the pressure cover includes a piston rod slidably connected with the drainage member, and the piston rod extends into the A closed liquid mixed cavity is formed in the hollow part of the drainage member, and the guiding part is communicated with the mixed liquid cavity.

Preferably, the flow guiding member is slidably connected to the housing, and the flow guiding member moves vertically along the direction defined by the first cavity under the action of an external force.

Preferably, the gland further comprises a locking block, and the locking block is integrally connected with the piston rod through a cover plate;

The locking block is arranged outside the flow guide, and the housing is provided with a locking block that can be disconnected from the locking block. When the locking block is connected with the locking block, the pressure The cover and the casing form a relatively stationary fixed structure.

Preferably, a locking groove is formed on the side wall of the locking block, and the pressing cover can be rotated along the axis of the liquid mixing chamber, so that the locking groove is engaged with the locking block, thereby restricting the pressing Movement of the cover in the vertical direction.

Preferably, the side wall of the drainage member is provided with an escape groove for part of the gland to pass through.

Preferably, the abdication groove extends downward from the drainage member to a middle position of the drainage member;

The side wall of the drainage member is also provided with a limiting hole penetrating obliquely downward, and the position of the limiting hole is lower than the abdication groove.

Preferably, the casing extends from the bottom surface toward the first cavity to form a second cavity, the bottom portion of the first cavity is recessed inward to form a third cavity, the second cavity and The third cavity receives the guide parts for sucking the two reagents respectively.

Preferably, the guide portion includes:

a suction tube for sucking the first liquid, which is installed in the second cavity, so that the suction tube is detachably connected to the housing; and

The second liquid cup for holding the second liquid is held in the third cavity.

Preferably, the drainage member includes a drainage tube main body with the liquid mixing chamber disposed therein; the drainage tube main body is extended outward to form a branch tube and a puncture part to correspond to the suction tube and the second liquid cup;

The branch pipe and the puncture part can be connected with the suction pipe and the second liquid cup correspondingly to form a liquid channel, so as to guide the liquid into the liquid mixing chamber through the liquid channel.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention provides a portable injection device for sampling and adding samples. By moving a piston rod relative to a liquid mixing chamber, different reagents are sucked into the liquid mixing chamber to be mixed, and the supplies required for the experiment are integrated, while the operation steps are simplified, and the user is convenient. The invention has simple structure and convenient use.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and implement it according to the content of the description, the preferred embodiments of the present invention are described in detail below with the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a cross-sectional view of a casing in a preferred embodiment of the present invention;

FIG. 2 is a schematic three-dimensional structure diagram of a sampling device in a preferred embodiment of the present invention;

Fig. 3 is the exploded schematic diagram of the sampling device in a preferred embodiment of the present invention;

4 is a cross-sectional first view of a sampling device in a preferred embodiment of the present invention;

FIG. 5 is a cross-sectional second view of the sampling device in a preferred embodiment of the present invention;

FIG. 6 is a schematic three-dimensional structure diagram of a drainage member in a preferred embodiment of the present invention;

Fig. 7 is the bottom view of the drainage member in a preferred embodiment of the present invention;

FIG. 8 is a cross-sectional view of a drainage member in a preferred embodiment of the present invention;

9 is a cross-sectional view of a second liquid cup in a preferred embodiment of the present invention.

Shown in the picture:

1. Drainage parts;

11. The main body of the drainage tube;

111. Mixing chamber; 112. Slider; 113. Allowance groove; 114. Limit hole;

12. Branch pipe; 121. First liquid channel;

13. Puncture part;

131. Puncture the tip;

132. Connecting ribs;

133. Connection block;

134. Extension block;

135. Isolation room;

136. The second liquid channel;

2. Shell;

21, the first cavity; 211, the chute;

23, the second cavity; 231, the bayonet;

24. The third cavity;

25. Lock block;

3. Straw;

31. Straw body; 311, connecting end; 312, liquid inlet end;

32. Buckle;

4. The second liquid cup;

41. The body of the liquid cup; 411. The liquid chamber;

42. Aluminum film;

5. Gland;

51, piston rod; 52, locking block; 521, locking groove; 53, cover plate.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, the foregoing and other objects, features, aspects and advantages of the present invention will become more apparent, so that those skilled in the art can implement the described embodiments with reference to the description. Only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to refer to the same or like parts.

Unless otherwise defined, technical or scientific terms used herein should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first", "second" and similar terms used in the description of the patent application and the claims of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Likewise, words such as "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one. Words like "include" or "include" mean that the elements or items appearing before "including" or "including" cover the elements or items listed after "including" or "including" and their equivalents, and do not exclude other component or object. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the size from top to bottom, "width" corresponds to the size from left to right, and "depth" corresponds to the size from front to back. These relative terms are for convenience of description and are generally not intended to require a specific orientation. Terms referring to attachment, coupling, etc. (eg, "connected" and "attached") refer to the fixed or attached relationship, as well as the movable or rigid attachment or relationship of these structures to each other, directly or indirectly, through intervening structures, unless The other way is explicitly stated.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, on the premise of no conflict, the embodiments or technical features described below can be combined arbitrarily to form new embodiments. .

According to the technical solution of the present invention, as shown in FIGS. 1 and 2 , a portable injection device for sampling and adding samples includes a casing 2 for forming a covering structure of the sampling device; wherein, the interior of the casing 2 hollow and open at its top end to form a first cavity 21;

Referring to FIG. 5 , the casing 2 extends from the bottom surface toward the first cavity 21 to form a second cavity 23 , and the bottom portion of the first cavity 21 is recessed inward to form a third cavity body 24;

The second cavity 23 and the third cavity 24 are used for receiving the guiding parts of the diversion reagent; in a preferred embodiment, the guiding parts absorb the first liquid and the second liquid respectively;

Specifically, the second cavity 23 is used to connect the suction pipe 3 in the sampling device for sucking the first liquid; the third cavity 24 is used to receive the second liquid cup 4 in the sampling device, and the The second liquid cup 4 holds the second liquid;

A suction mechanism, which is arranged in the first cavity 21, through the suction mechanism, it is convenient to suck a variety of reagents into the suction mechanism at the same time for mixing, and the suction mechanism increases its internal The volume of the closed space is reduced by the pressure, and the liquid is pressed into the closed space, which is convenient for different reagents to be sucked into the mixing chamber and mixed, and the supplies required for the experiment are integrated, simplifying the operation steps and facilitating the users.

In a preferred embodiment, the suction mechanism includes: a drainage member 1 , which is arranged in the first cavity 21 ; the casing 2 is reserved for receiving the drainage member 1 , the suction pipe 3 and the second cavity 21 . The accommodating space of the liquid cup 4 facilitates the integration of the sampling device and is easy to carry, so as to cope with the inconvenience of carrying it outdoors or in special scenarios; and,

The gland 5, which includes a piston rod 51, and the piston rod 51 is slidably connected with the drainage member 1;

Wherein, the drainage member 1 includes a drainage tube main body 11 , the interior of which is hollow, and the piston rod 51 extends into the hollow portion of the drainage tube main body 11 to form a closed liquid-mixing cavity 111 inside, through the gland 5 Relatively sliding with the drainage member 1, so that the volume of the liquid mixing chamber 111 changes, so that the reagent is sucked into the liquid mixing chamber 111;

The gland 5 also includes a locking block 52, which is integrally connected with the piston rod 51 through a cover plate 53;

The locking block 52 is provided outside the flow guide 1, and the housing 2 is provided with a locking block 25 that can be disconnected from the locking block 52. When the locking block 52 is connected to the locking block 25 When connected, the press cover 5 and the housing 2 form a relatively static fixed structure. As can be seen in the figure, the locking block 52 is arranged on the outer side of the housing 2, and the locking block 25 Correspondingly is provided on the outer side wall of the housing 2, however, it should be understood that the setting position of the locking block 52 is fixed. In the present invention, the locking block 52 and the locking block 25 A locking structure is formed. At this time, when the drainage member 1 is pressed down by an external force, when the gland 5 moves relative to the drainage member 1, the mixed liquid chamber 111 is stretched and the volume increases, so that the reagent is sucked into the mixed liquid chamber. 111. Since the downward movement of the drainage member 1 is restricted by the casing 2, the increase in the stretched volume of the drainage member 1 is constant. Therefore, the amount of reagent sucked into the mixed liquid chamber 111 is constant. For analysis, therefore, the amount of reagent pumped in a single time does not need to be too large to avoid waste, and the locking block 52 and the locking block 25 form a locking structure, which effectively limits the amount of reagent sucked into the mixing chamber 111, thereby satisfying the quantitative requirement requirements.

Specifically, since the gland 5 and the housing 2 form a relatively static fixed structure, the gland 5 and the liquid mixing chamber 111 in the housing 2 form a fixed stroke that restricts the drainage member 1 , so that the The drainage member 1 moves within one end of the restricted stroke, so as to control the stretching space of the liquid mixing chamber 111 , thereby controlling the amount of reagent sucked into the liquid mixing chamber 111 , so as to achieve quantification.

A locking groove 521 is formed on the side wall of the locking block 52 , and the gland 5 can rotate along the axis of the mixing chamber 111 , so that the locking groove 521 is engaged with the locking block 25 , thereby restricting the The vertical movement of the cover 5 can be unlocked or locked by rotating the locking block 52, so as to control sampling or sample addition.

The side wall of the drainage member 1 is provided with an escape groove 113 for part of the gland 5 to pass through. As mentioned above, since the amount of reagent sampling and sample addition does not need to be large, the volume of the liquid mixing chamber 111 is limited. It does not need to be very large. However, the design of the piston rod 51 is required to be longer due to the need to pump the liquid, thereby causing the length of the entire injection device to increase. By arranging the escape groove 113, the piston is shortened The length of the rod 51 reduces the length of the entire device, making it more convenient to carry.

Further, as shown in FIG. 8 , the abdication groove 113 extends downward from the flow guide member 1 to the middle position of the flow guide member 1 ; the side wall of the flow guide member 1 is also provided with an oblique downward direction. The limit hole 114 that runs through, the position of the limit hole 11 is lower than the abdication groove 113, when the piston rod 51 slides to the position of the limit hole 11, the liquid mixing chamber 111 is no longer in a closed state, and the reagent will not be inhaled. In the mixing chamber 111, the amount of the reagent in the mixing chamber 111 is limited, so as to limit the maximum amount of the reagent in the mixing chamber 111. At the same time, the inclined limiting hole 114 restricts the liquid from the limiting hole 114 through its inclined inner wall. overflow.

a branch pipe 12, which is arranged at the bottom of the main body 11 of the drainage pipe; and

the puncture part 13, which is located on the same side of the main body 11 of the drainage tube that is close to the branch tube 12;

A first liquid channel 121 is opened from the bottom of the branch pipe 12 to extend into the mixed liquid cavity 111, and the first liquid is drawn into the mixed liquid cavity 111 through the branch pipe 12;

The puncture portion 13 opens a second liquid channel 136 from the bottom to extend into the liquid mixing chamber 111. The bottom of the puncture portion 13 is provided with a downwardly protruding protruding block to form a thorn for piercing the aluminum film. broken tip 131;

Specifically, referring to FIGS. 3 and 4 , the drainage member 1 is driven by an external force, so that the drainage member 1 moves to the branch pipe 12 and the suction pipe 3 is connected, and at the same time, the puncture part 13 extends into the first Inside the two-liquid liquid cup 4 , the branch pipe 12 and the suction pipe 3 form a liquid channel for the first liquid, and the puncture portion 13 forms a liquid channel for the second liquid, and finally the two liquids enter the mixed liquid chamber 111 mix.

Referring to FIG. 9 , the piercing portion 13 pierces the aluminum film 42 covering the second liquid cup 4 , and the second liquid cup 4 is hollow inside to form a liquid holding cavity for holding the second liquid. 411, the liquid storage chamber 411 forms an opening at the top of the second liquid liquid cup 4. When the connection block 133 extends into the liquid storage chamber 411 from the opening, the opening is connected to the liquid storage chamber 411. The outer edge of the connecting block 133 is sealed and connected, and under continuous pressing and limited space, the second liquid in the liquid holding chamber 411 is pressed into the liquid mixing chamber 111 from the second liquid channel 136 .

The above-mentioned second liquid and the first liquid are mixed in the liquid mixing chamber 111 at the same time to form the solution required for the fluorescence immunoassay. The problem of pipette tips improves portability; at the same time, the puncture part 13 and the branch pipe 12 can simultaneously collect two liquids and mix them in the liquid mixing chamber 111 , simplifying the operation steps and improving the analysis efficiency.

The suction tube 3 is detachably connected to the casing 2; specifically, a bayonet 231 is opened on the inner wall of the second cavity 23, and the bayonet 231 corresponds to the buckle 32 provided on the outer wall of the suction tube 3. The buckle 32 is arranged at one end of the suction pipe 3 close to the connecting end 311 , the connecting end 311 extends into the first cavity 21 and is sealedly connected with the branch pipe 12 , and the other end of the suction pipe 3 is inserted into the first cavity 21 . The liquid end 312 extends into the container for holding the first liquid to absorb the first liquid.

The bayonet 231 is disposed on the inner walls on both sides corresponding to the second cavity 23 and penetrates to the outer side of the housing 2 . The suction tube 3 is disconnected from the housing 2 .

The inner side wall of the first cavity 21 is provided with a chute 211 extending in the vertical direction, and the outer wall of the drainage tube main body 11 is provided with a slider 112 corresponding to the chute 211; The chute 211 defines the sliding direction to make it reciprocate along the vertical direction; further, the outer edge of the housing 2 is provided with a ring-shaped raised skirt, which provides a force application point for the operator, thereby facilitating the driving of the drainage member 1 Movement relative to the housing.

As shown in FIGS. 6 and 7 , the puncturing part 13 includes a connecting block 133 , and the extending direction of the connecting block 133 is parallel to the extending direction of the branch pipe 12 . When the drainage member 1 is driven, the puncturing part 13 and the branch pipe 12 can be moved in the same direction to facilitate simultaneous extension into two containers containing different liquids, so as to absorb the two liquids for mixing;

An extension block 134 is integrally connected to the top of the connection block 133 , and the extension block 134 is extended and combined with the side wall of the drainage tube main body 11 , and the connection block 133 and the extension block 134 are combined to form the The main structure of the puncture part 13 .

The second liquid channel 136 in the connecting block 133 runs through the connecting block 133 up and down to form a hollow portion and communicates with the second liquid channel 136 in the extending block 134;

The connecting ribs 132 are radially distributed in the hollow part of the connecting block 133 , so that the connecting ribs 132 and the hollow inner wall of the connecting block 133 form a plurality of isolation cavities 135 , the isolation cavities 135 and the extension block 134 The second liquid channel 136 within is communicated.

The connecting ribs 132 intersect to form a central column located in the axial direction of the connecting block 133, the piercing tip 131 is arranged on the central column, and the piercing tip 131 pierces the central position of the aluminum film 42, The aluminum film 42 stretched by the puncture part 13 is relatively uniform, which avoids that the partial aluminum film 42 is too long to affect the stretched state, or when part of the aluminum film 42 is too long, it protrudes into the second liquid to cause contamination of the liquid. , causing the solution to fail after mixing.

The piercing tip 131 is circular, and the shape and size of the piercing tip 131 are the same as or larger than the cross section of the central column, so that the piercing tip 131 is directly integrated with the connecting rib 132, and the After the prong 131 pierces the aluminum film 42 , the junction of the piercing prong 131 and the connecting rib 132 is pressed on the aluminum film 42 , and the aluminum film 42 can be easily stretched if the pressure is large, so as to avoid the puncturing of the prong 131 It forms a stepped structure with the central column. When the piercing tip 131 pierces the aluminum film 42, the central column is in contact with the aluminum film 42. As the contact area increases and the pressure decreases, it is difficult to isolate the central column from the aluminum film 42. .

In a preferred embodiment, the shape and size of the opening are consistent with the outer edge of the connecting block 133, and the connecting block 133 extends into the opening to form a sealed connection.

In another preferred embodiment, the opening is smaller than the outer edge of the connecting block 133; the liquid cup body 41 of the second liquid liquid cup 4 is made of silica gel, when the connecting block 133 extends into the When the liquid chamber 411 is contained, the connecting block 133 stretches the elastic opening, and the liquid cup body 41 has certain elasticity and variability, so that the opening can be tightly wrapped on the connecting block 133, so that the sealing performance is improved. better.

Referring to FIG. 4 , the bottom of the liquid storage chamber 411 is tapered, the connecting rib 132 protrudes from the bottom of the connecting block 133 , and the shape of the protruding connecting ribs 132 corresponds to the liquid storage chamber The shape of the bottom of 411 reduces the contact area with the aluminum film 42 through the conical connecting ribs 132 and increases the pressure so that the connecting ribs 132 can stretch the aluminum film 42 apart.

The number of the connecting ribs 132 is three, and the hollow spaces in the connecting block 133 are separated by the connecting ribs 132 to form three isolation cavities 135 , and the isolation cavities 135 are respectively connected to the interior of the extension block 134 . The second liquid channel 136 is connected to each other, and the aluminum film 42 is stretched and isolated by the connecting ribs 132 to ensure that the second liquid cup 4 is normally pressed into the second liquid channel 136 .

The method for sampling and adding samples using the portable injection device in this preferred embodiment specifically includes: adjusting the gland 5 and the drainage member 1 to a closed state. The bottom of the hollow part is in contact, and the volume of the liquid mixing chamber 111 can be regarded as zero;

Rotate the gland 5 to lock the locking block 52 and the locking block 25, and press the drainage member 1. At this time, the pressure drainage member 1 moves in a direction, and the branch pipe 12 is connected with the suction pipe 3 to form a liquid suction channel for the first liquid. At the same time, the puncture part 13. Puncture the aluminum film 42 on the second liquid cup 4 and extend into the liquid-containing cavity 411, because the volume of the mixed liquid cavity 111 gradually increases, so that the first liquid and the second liquid are simultaneously sucked into the mixed liquid cavity 111 and mixed;

When the piston rod 51 crosses the limit hole 114, the liquid in the mixing chamber 111 remains unchanged. At this time, the gland 5 is reversely rotated to unlock the locking block 52 and the locking block 25, and the gland 5 is pushed to press the piston rod 51 into the In the mixed liquid cavity 111, the mixed liquid is pressed out from the branch pipe 12. Since the puncture part 13 is still located in the liquid containing cavity 411, it is difficult for the mixed liquid to overflow from the punctured part 13. Therefore, the mixed liquid is quantitatively pressed out from the branch pipe 12. , so as to achieve quantitative sample addition.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form; any person of ordinary skill in the industry can smoothly implement the present invention as shown in the accompanying drawings and above; however, any Those skilled in the art, without departing from the scope of the technical solution of the present invention, make use of the above-disclosed technical content to make some changes, modifications and equivalent changes of evolution are equivalent embodiments of the present invention; at the same time, Any alteration, modification and evolution of any equivalent changes made to the above embodiments according to the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

A portable injection device for sampling and adding samples, characterized in that it includes:

a casing (2), the interior of which is hollow and the top of which is opened to form a first cavity (21);

a suction mechanism, which is arranged in the first cavity (21); and

A guide for diverting reagents, which is provided at the bottom of the housing (2);

Wherein, the suction mechanism includes a drainage member (1) and a pressure cover (5), the drainage member (1) is provided with a hollow portion inside, and the pressure cover (5) includes a flow drainage member (1) A piston rod (51) that is slidably connected, the piston rod (51) protrudes into the hollow portion of the drainage member (1) so that a closed liquid mixing chamber (111) is formed therein, and the guide portion is connected to the The mixed liquid chamber (111) is communicated.
The portable injection device according to claim 1, wherein the drainage member (1) is slidably connected to the housing (2), and the drainage member (1) is acted by an external force along the first cavity (21) Vertical movement in a defined direction.
The portable injection device according to claim 3, characterized in that, the pressing cover (5) further comprises a locking block (52), and the locking block (52) and the piston rod (51) pass through a cover The plate (53) is integrally connected;

The locking block (52) is arranged outside the flow guide (1), and the housing (2) is provided with a locking block (25) that can be disconnected from the locking block (52). When the locking block (52) is connected with the locking block (25), the pressing cover (5) and the housing (2) form a relatively static fixing structure.
The portable injection device according to claim 4, characterized in that, a locking groove (521) is formed on the side wall of the locking block (52), and the pressing cover (5) can move along the liquid mixing chamber (111). ) axis rotates, so that the locking groove (521) is engaged with the locking block (25), thereby restricting the vertical movement of the pressing cover (5).
The portable injection device according to claim 5, characterized in that, the side wall of the drainage member (1) is provided with a letting groove (113) through which part of the pressing cover (5) passes.
The portable injection device according to claim 6, characterized in that, the escape groove (113) extends downward from the drainage member (1) to a middle position of the drainage member (1);

A limiting hole (114) penetrating obliquely downward is also provided on the side wall of the drainage member (1), and the position of the limiting hole (114) is lower than the position of the abdication groove (113).
The portable injection device according to any one of claims 1-7, characterized in that, the casing (2) extends from the bottom surface toward the first cavity (21) to form a second cavity (23) ), the bottom portion of the first cavity (21) is recessed inward to form a third cavity (24), and the second cavity (23) and the third cavity (24) are respectively used to absorb two reagents. Guidance Department.
9. The portable injection device of claim 8, wherein the guide portion comprises:

a suction pipe (3) for sucking the first liquid, which is installed in the second cavity (23), so that the suction pipe (3) is detachably connected to the casing (2); and

A second liquid cup (4) for holding the second liquid, which is held in the third cavity (24).
The portable injection device according to claim 9, characterized in that, the drainage member (1) comprises a drainage tube body (11) with the liquid mixing chamber (111) disposed therein; the drainage tube body (11) is directed toward A branch pipe (12) and a puncture part (13) are formed extending outward to correspond to the straw (3) and the second liquid cup (4);

The branch pipe (12) and the puncture part (13) can be connected with the suction pipe (3) and the second liquid cup (4) correspondingly to form a liquid channel, so as to guide the liquid to the mixed liquid chamber (111) through the liquid channel )Inside.