Portable pen-type injector and method of use

Abstract

The present invention is applicable to the technical field of syringes, and provides a portable pen-type syringe and a method of using the same, comprising an upper connecting part and a lower connecting part which are screwed together; a liquid storage part is slidably arranged between the inner walls of the upper connecting shell and the lower connecting shell; the liquid storage part comprises a piston column which is slidably arranged in the upper piston cylinder and the lower piston cylinder; a piston part which is slidably matched with the piston column is fixedly installed at the top of the upper piston cylinder; an annular liquid storage box which is slidably matched with the inner walls of the upper connecting shell and the lower connecting shell is fixed on the outer peripheral side of the piston column; the device realizes quantitative extraction of the liquid medicine by placing the liquid medicine in the annular liquid storage box through the linkage cooperation between the various components, does not need to frequently replace the medicine bag, and improves the convenience of operation. At the same time, it realizes isolation between the extraction of the liquid medicine and the injection of the liquid medicine, avoids the contamination of the liquid medicine in the annular liquid storage box, replaces the traditional pressing structure, and further improves the convenience of the pen-type syringe, making it easy to use.

Description

Technical Field

[0001] The present invention relates to the technical field of syringes, and more particularly to a portable pen-type syringe and a method for using the same. Background Art

[0002] A pen syringe is a type of syringe. It is named for its pen-like appearance. It is more portable than traditional syringes and is often used by patients to inject medicines themselves.

[0003] Most of the existing pen-type syringes adopt the traditional push-type structure, that is, the medicine liquid is squeezed by pressing the piston rod to drive the piston plate to move. This push-type injection structure is not convenient for controlling the dosage. At the same time, the existing pen-type syringe places the medicine bag inside the syringe barrel for push injection. The medicine bag needs to be replaced after each injection. The operation is relatively cumbersome. Moreover, the existing pen-type syringe does not have the function of stirring the medicine liquid, which affects the effect of the injection. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a portable pen-type injector and a method of use. By placing the medicine liquid in an annular liquid storage box and coordinating the various components, quantitative extraction of the medicine liquid is achieved, and there is no need to frequently replace the medicine bag, thereby improving the convenience of operation. At the same time, the extraction of the medicine liquid and the injection of the medicine liquid are isolated to avoid contamination of the medicine liquid in the annular liquid storage box. The traditional press-type structure is replaced, thereby further improving the convenience of the pen-type injector and facilitating use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A portable pen-type injector comprises an upper connecting part and a lower connecting part which are screwed to each other; the upper connecting part comprises an upper connecting shell; the lower connecting part comprises a lower connecting shell; the top of the upper connecting shell is connected to an upper piston cylinder; the bottom of the lower connecting shell is connected to a lower piston cylinder.

[0007] A liquid storage part is slidably arranged between the inner walls of the upper connecting shell and the lower connecting shell; the liquid storage part includes a piston column slidably arranged in the upper piston cylinder and the lower piston cylinder; the interior of the piston column is a hollow structure; a piston part that slides with the piston column is fixedly installed on the top of the upper piston cylinder; an annular liquid storage box that slides with the inner walls of the upper connecting shell and the lower connecting shell is fixed on the outer peripheral side of the piston column.

[0008] A vertical infusion groove is provided inside the piston column; a liquid outlet pipe connected to the piston column is provided at the bottom of the vertical infusion groove; a plurality of liquid outlet holes connected to the vertical infusion groove are evenly provided on the inner wall of the annular liquid storage box; a drainage pipe is provided on the inner bottom surface of the piston column; a first one-way valve is provided on the drainage pipe and the liquid outlet pipe.

[0009] The present invention is further configured as follows: a threaded ring is fixed at the bottom of the upper connecting shell; a threaded groove threadedly connected to the threaded ring is opened at the top of the lower connecting shell; a needle is connected to the bottom of the lower piston cylinder; and a protective sleeve is provided at the bottom of the lower piston cylinder and is sleeved on the needle.

[0010] An exhaust pipe is connected to the inner bottom surface of the lower piston cylinder; a breathable and water-blocking membrane is provided inside the exhaust pipe near its top, and a second one-way valve is provided inside the exhaust pipe near its bottom; a liquid injection hole is provided at the top of the annular liquid storage box; a sealing cover is screwed inside the liquid injection hole.

[0011] The present invention is further configured as follows: a receiving chamber is symmetrically provided inside the upper piston cylinder; a return spring is connected to the top of the receiving chamber; and a lifting block that is slidably matched with the receiving chamber is fixed to the bottom end of the return spring.

[0012] A first annular groove is provided on the top of the annular liquid storage box; a second annular groove is provided on the inner wall of the first annular groove; an annular plate is rotatably arranged inside the first annular groove; vertical rods are symmetrically fixed on the top of the annular plate; an annular rail that rotates with the second annular groove is fixed on the outer peripheral side of the annular plate; a sliding column that slides with the storage cavity is fixed on the top of the vertical rod.

[0013] The present invention is further configured as follows: a control box is fixedly passed through the outer peripheral side of the upper piston cylinder; a battery pack and a controller are arranged inside the control box; a third annular groove is opened at the top of the upper piston cylinder; an annular electromagnetic suction cup is installed at the top of the third annular groove; a fourth annular groove is opened at the top of the piston column; an iron ring is fixed to the bottom surface of the fourth annular groove.

[0014] The first control button and the second control button are symmetrically installed on the outer peripheral side of the upper connecting shell; the input end of the controller is electrically connected to the first control button and the second control button respectively, and its output end is electrically connected to the annular electromagnetic suction cup.

[0015] The present invention is further configured as follows: an annular cavity is provided on the top of the upper connecting shell and the bottom of the lower connecting shell; a plurality of air holes are evenly provided on the bottom surface of the annular cavity; an elastic diaphragm is provided between the inner walls of the annular cavity; and a plurality of anti-slip grooves are provided on the outer peripheral sides of the upper connecting shell and the lower connecting shell.

[0016] The present invention is further configured as follows: a mounting groove is provided on the top of the upper piston cylinder; the piston part includes a fixing plate fixedly installed in the mounting groove; a connecting rod is fixed through the top of the fixing plate; a piston plate is rotatably provided at the bottom end of the connecting rod and is slidably matched with the inner wall of the piston column; a limiting sleeve is fixed on the top of the piston plate and is rotatably matched with the connecting rod.

[0017] An L-shaped plate is symmetrically fixed on the top of the piston plate; and a lifting groove which is symmetrically opened on the inner wall of the piston column and is slidably matched with the L-shaped plate.

[0018] The present invention is further configured as follows: a spiral groove is provided on the inner wall of the piston column near its inner top; an extension rod is slidably provided through the inner wall of the connecting rod; a ball head is fixed at one end of the extension rod and is slidably matched with the spiral groove; a guide groove is provided inside the connecting rod; a guide ball is fixed at the other end of the extension rod; a connecting spring mounted on the extension rod is fixed between the guide ball and the inner wall of the guide groove.

[0019] A lifting plate is slidably arranged inside the guide groove; a mounting block is fixed at the top of the connecting rod; a screw rod is rotatably arranged at the top of the lifting plate and is rotatably matched with the thread of the mounting block.

[0020] The present invention is further configured as follows: an oblique guide groove and a vertical guide groove adapted to the guide ball are sequentially opened on the side of the lifting plate from top to bottom; a first pressure sensor and a second pressure sensor are respectively installed on the sides of the oblique guide groove and the vertical guide groove; a first warning light and a second warning light are sequentially installed on the top of the mounting block; the input end of the controller is electrically connected to the first pressure sensor and the second pressure sensor, respectively, and its output end is electrically connected to the first warning light and the second warning light, respectively.

[0021] The advantages of the present invention are:

[0022] 1. The present invention places the medicine liquid into the annular liquid storage box and realizes quantitative extraction of the medicine liquid through the linkage cooperation between various components. There is no need to frequently replace the medicine bag, which improves the convenience of operation. At the same time, the extraction of the medicine liquid and the injection of the medicine liquid are isolated to avoid contamination of the medicine liquid in the annular liquid storage box.

[0023] 2. The present invention realizes the extraction and injection of liquid medicine by controlling the liquid storage part between the upper connecting part and the lower connecting part to rise and fall. The piston part does not move up and down, replacing the traditional pressing structure, further improving the convenience of the pen-type syringe and making it easier to use.

[0024] 3. The piston column of the present invention drives the annular liquid storage box to rotate synchronously during the rotation process, thereby realizing rotational stirring of the liquid medicine inside the annular liquid storage box, preventing the solute precipitation in the liquid medicine inside the annular liquid storage box, and improving the quality of liquid medicine injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a schematic structural diagram of a portable pen-type injector.

[0026] Figure 2 For the present invention Figure 1 A partial cross-sectional view of .

[0027] Figure 3 For the present invention Figure 2 A magnified image of area A.

[0028] Figure 4 It is a schematic structural diagram of the upper connecting portion of the present invention.

[0029] Figure 5 It is a structural schematic diagram of the lower connecting part of the present invention.

[0030] Figure 6 For the present invention Figure 5 Schematic diagram of the structure from a frontal perspective.

[0031] Figure 7 It is a schematic structural diagram of the liquid storage part of the present invention.

[0032] Figure 8 For the present invention Figure 7 Schematic diagram of the structure from a frontal perspective.

[0033] Fig. 9 For the present invention Figure 8 A magnified view of area B.

[0034] Fig.10 It is a schematic structural diagram of the piston part of the present invention.

[0035] Fig.11 It is a flow chart of the present invention under different use states, wherein:

[0036] (a) is a schematic diagram of the structure of the portable pen-type injector in the initial state, (b) is a schematic diagram of the structure during the extraction process, (c) is a schematic diagram of the structure before injection, and (d) is a schematic diagram of the structure after the injection is completed.

[0037] In the figure: 1, upper connecting part; 2, lower connecting part; 3, upper connecting shell; 4, lower connecting shell; 5, upper piston cylinder; 6, lower piston cylinder; 7, liquid storage part; 8, piston column; 9, piston part; 10, annular liquid storage box; 11, vertical infusion tank; 12, liquid outlet pipe; 13, liquid outlet hole; 14, liquid discharge pipe; 15, threaded ring; 16, threaded groove; 17, needle; 18, protective sleeve; 19, exhaust pipe; 20, liquid injection hole; 21, sealing cover; 22, storage chamber; 23, reset spring; 24, lifting block; 25, first annular groove; 26, second annular groove; 27, annular plate; 28, annular plate; 29, sliding column; 30, control box; 31, third annular groove; 32, annular electric Magnetic suction cup; 33, fourth annular groove; 34, iron ring; 35, first control button; 36, second control button; 37, annular cavity; 38, air vent; 39, elastic diaphragm; 40, anti-slip pattern; 41, mounting groove; 42, fixing plate; 43, connecting rod; 44, piston plate; 45, limiting sleeve; 46, L-shaped plate; 47, lifting groove; 48, spiral groove; 49, extension rod; 50, ball head; 51, guide groove; 52, guide ball; 53, connecting spring; 54, lifting plate; 55, mounting block; 56, screw; 57, inclined guide groove; 58, vertical guide groove; 59, first pressure sensor; 60, second pressure sensor; 61, first warning light; 62, second warning light. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0040] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0041] For example, see Figure 1-11 , the present invention provides the following technical solutions:

[0042] A portable pen-type injector, specifically, comprises an upper connecting part 1 and a lower connecting part 2 which are screwed to each other; the upper connecting part 1 comprises an upper connecting shell 3; the lower connecting part 2 comprises a lower connecting shell 4; an upper piston cylinder 5 is connected to the top of the upper connecting shell 3; a lower piston cylinder 6 is connected to the bottom of the lower connecting shell 4; a liquid storage part 7 is slidably arranged between the inner walls of the upper connecting shell 3 and the lower connecting shell 4; the liquid storage part 7 comprises a piston column 8 slidably arranged in the upper piston cylinder 5 and the lower piston cylinder 6; the interior of the piston column 8 is a hollow structure; the top of the upper piston cylinder 5 is fixedly arranged A piston portion 9 is provided which is slidably matched with the piston column 8; an annular liquid storage box 10 which is slidably matched with the inner walls of the upper connecting shell 3 and the lower connecting shell 4 is fixed to the outer peripheral side of the piston column 8; a vertical infusion groove 11 is provided inside the piston column 8; a liquid outlet pipe 12 which is connected to the piston column 8 is provided at the bottom of the vertical infusion groove 11; a plurality of liquid outlet holes 13 which are connected to the vertical infusion groove 11 are evenly provided on the inner wall of the annular liquid storage box 10; a discharge pipe 14 is provided in communication with the inner bottom surface of the piston column 8; a first one-way valve is provided on both the discharge pipe 14 and the liquid outlet pipe 12.

[0043] Working principle of the first embodiment:

[0044] By arranging a first one-way valve on the discharge pipe 14, the medicine liquid in the piston column 8 with a hollow structure inside can only be discharged into the lower piston cylinder 6 through the discharge pipe 14. By arranging a first one-way valve on the outlet pipe 12, the medicine liquid in the annular liquid storage box 10 can only be delivered into the piston column 8 through the outlet hole 13, the vertical infusion groove 11 and the outlet pipe 12 in sequence.

[0045] By controlling the liquid storage part 7 to slide down along the inner wall of the lifting groove 47, the medicine liquid inside the annular liquid storage box 10 is drawn into the piston column 8 through the liquid outlet pipe 12, and then the liquid storage part 7 is controlled to slide up along the lifting groove 47, so that the medicine liquid inside the piston column 8 is discharged into the lower piston cylinder 6 through the discharge pipe 14, the protective sleeve 18 is removed, and the needle 17 is inserted into the patient's body. The liquid storage part 7 is controlled to slide down along the lifting groove 47, and the medicine liquid in the lower piston cylinder 6 is injected into the patient's body through the needle 17. The above process realizes the isolation of medicine extraction and injection, prevents the medicine liquid inside the annular liquid storage box 10 from being contaminated, and realizes the quantitative injection of the medicine liquid.

[0046] For example 2, please refer to Figure 1-11, this embodiment 2 makes the following improvements on the basis of embodiment 1. Specifically, a threaded ring 15 is fixed to the bottom of the upper connecting shell 3; a threaded groove 16 screwed to the threaded ring 15 is provided at the top of the lower connecting shell 4; a needle 17 is provided at the bottom of the lower piston cylinder 6; a protective sleeve 18 is provided at the bottom of the lower piston cylinder 6 and is sleeved on the needle 17; an exhaust pipe 19 is provided at the bottom surface of the lower piston cylinder 6; a breathable and water-blocking film is provided inside the exhaust pipe 19 near the top thereof, and a second one-way valve is provided inside the exhaust pipe 19 near the bottom thereof; a liquid injection hole 20 is provided at the top of the annular liquid storage box 10; a sealing cover 21 is screwed inside the liquid injection hole 20.

[0047] A receiving chamber 22 is symmetrically provided inside the upper piston cylinder 5; a return spring 23 is connected to the top of the receiving chamber 22; a lifting block 24 that slides with the receiving chamber 22 is fixed to the bottom of the return spring 23; a first annular groove 25 is provided on the top of the annular liquid storage box 10; a second annular groove 26 is provided on the inner wall of the first annular groove 25; an annular plate 27 is rotatably provided inside the first annular groove 25; vertical rods 28 are symmetrically fixed to the top of the annular plate 27; an annular rail that rotates with the second annular groove 26 is fixed to the outer peripheral side of the annular plate 27; a sliding column 29 that slides with the receiving chamber 22 is fixed to the top of the vertical rod 28.

[0048] A control box 30 is fixedly mounted on the outer side of the upper piston cylinder 5; a battery pack and a controller are arranged inside the control box 30; a third annular groove 31 is provided at the top of the upper piston cylinder 5; an annular electromagnetic suction cup 32 is installed at the top of the third annular groove 31; a fourth annular groove 33 is provided at the top of the piston column 8; an iron ring 34 is fixed to the bottom surface of the fourth annular groove 33; a first control button 35 and a second control button 36 are symmetrically mounted on the outer side of the upper connecting shell 3; the input end of the controller is electrically connected to the first control button 35 and the second control button 36 respectively, and its output end is electrically connected to the annular electromagnetic suction cup 32.

[0049] An annular cavity 37 is provided at the top of the upper connecting shell 3 and the bottom of the lower connecting shell 4; a plurality of air holes 38 are evenly provided on the inner bottom surface of the annular cavity 37; an elastic diaphragm 39 is provided between the inner walls of the annular cavity 37; and a plurality of anti-slip grooves 40 are provided on the outer peripheral sides of the upper connecting shell 3 and the lower connecting shell 4.

[0050] A mounting groove 41 is provided at the top of the upper piston cylinder 5; the piston part 9 includes a fixing plate 42 fixedly installed in the fixing groove 41; a connecting rod 43 is fixedly passed through the top of the fixing plate 42; a piston plate 44 rotatably provided at the bottom end of the connecting rod 43 and slidingly engaged with the inner wall of the piston column 8; a limiting sleeve 45 rotatably engaged with the connecting rod 43 is fixed at the top of the piston plate 44; an L-shaped plate 46 is symmetrically fixed to the top of the piston plate 44; and a lifting groove 47 symmetrically engaged with the L-shaped plate 46 is provided on the inner wall of the piston column 8.

[0051] A spiral groove 48 is provided on the inner wall of the piston column 8 near its inner top; an extension rod 49 is slidably arranged through the inner wall of the connecting rod 43; a ball head 50 is fixed at one end of the extension rod 49 and is slidably matched with the spiral groove 48; a guide groove 51 is provided inside the connecting rod 43; a guide ball 52 is fixed at the other end of the extension rod 49; a connecting spring 53 mounted on the extension rod 49 is fixed between the guide ball 52 and the inner wall of the guide groove 51; a lifting plate 54 is slidably arranged inside the guide groove 51; a mounting block 55 is fixed at the top of the connecting rod 43; a screw 56 is rotatably arranged on the top of the lifting plate 54 and is rotatably matched with the threaded mounting block 55.

[0052] The side of the lifting plate 54 is provided with an oblique guide groove 57 and a vertical guide groove 58 which are compatible with the guide ball 52 from top to bottom; the first pressure sensor 59 and the second pressure sensor 60 are respectively installed on the sides of the oblique guide groove 57 and the vertical guide groove 58; the first warning light 61 and the second warning light 62 are respectively installed on the top of the mounting block 55; the input end of the controller is electrically connected to the first pressure sensor 59 and the second pressure sensor 60, and its output end is electrically connected to the first warning light 61 and the second warning light 62, respectively.

[0053] Working principle of the second embodiment:

[0054] In the initial state, Fig.11 As shown in (a), the annular electromagnetic suction cup 33 is electrically attracted to the iron ring 34 on the top of the piston column 8, so that the top of the piston column 8 is sucked onto the top of the upper piston cylinder 5. At this time, the sliding column 29 is against the bottom of the lifting block 24, and the corresponding return spring 23 is compressed. The bottom of the piston column 8 fits with the piston plate 44, and the piston plate 44 blocks the liquid outlet pipe 12.

[0055] like Fig.11 As shown in (b), the first control button 35 is pressed to control the annular electromagnetic suction cup 33 to lose power. Under the elastic reset force of the reset spring 23, the lifting block 24 and the sliding column 29 are driven to slide down along the storage cavity 22, thereby driving the lifting groove 47 on the piston column 8 to slide down along the L-shaped plate 46. The piston plate 44 does not perform lifting and lowering movements, so that the liquid medicine in the annular liquid storage box 10 is sequentially delivered into the cavity between the piston column 8 and the piston plate 44 through the liquid outlet hole 13, the vertical infusion groove 11 and the liquid outlet pipe 12. At this time, the bottom of the piston column 8 is pressed against the inner bottom surface of the lower piston cylinder 6 to complete the quantitative extraction of the liquid medicine; by arranging a breathable and water-blocking membrane near the top of the exhaust pipe 19, and arranging a second one-way valve near the bottom of the exhaust pipe 19, the air inside the lower piston cylinder 6 is discharged through the exhaust pipe 19 by the descending piston column 8, and the air inside the lower piston cylinder 6 is discharged, thereby improving the quality of subsequent liquid medicine injection.

[0056] During the process of the liquid storage part 7 sliding down to extract the medicinal solution, the piston column 8 slides down along the L-shaped plate 46, and the ball head 50 guides the spiral groove 48, driving the two ends of the piston column 8 to descend and rotate inside the upper piston cylinder 5 and the lower piston cylinder 6 respectively. The piston column 8 is guided by the L-shaped plate 46 to drive the piston plate 44 to rotate synchronously around the connecting rod 43, so that the piston plate 44 and the rotating piston column 8 keep rotating synchronously, and only perform relative lifting and sliding to ensure the sealing between the piston plate 44 and the piston column 8; during the rotation process, the piston column 8 drives the annular liquid storage box 10 to rotate synchronously, so as to realize the rotation and stirring of the medicinal solution inside the annular liquid storage box 10, prevent the solute precipitation in the medicinal solution inside the annular liquid storage box 10, and improve the quality of the extracted medicinal solution.

[0057] like Fig.11 As shown in (c), the second control button 36 is pressed to control the annular electromagnetic suction cup 33 to be electrically attracted to the iron ring 34 at the top of the piston column 8, so that the top of the piston column 8 is sucked on the top of the upper piston cylinder 5. During the rising process of the piston column 8, the piston plate 44 discharges the liquid medicine inside the piston column 8 into the lower piston cylinder 6 through the discharge pipe 14, so as to prepare for the subsequent injection of the liquid medicine, realize the isolation of liquid medicine extraction and liquid medicine injection, and prevent the liquid medicine inside the annular liquid storage box 10 from being contaminated; during this process, the piston plate 44, the piston column 8 and the annular liquid storage box 10 rotate synchronously in opposite directions, further improving the uniformity of liquid medicine mixing; at the same time, the rising annular liquid storage box 10 presses the air above it into the annular cavity 37 at the top of the upper connecting shell 3 through the air hole 38, so that the corresponding elastic diaphragm 39 is inflated and expanded, so as to realize the deceleration of the piston column 8, reduce the impact force of the bottom of the piston column 8 on the piston plate 44, and reduce the impact force of the top of the piston column 8 on the top of the upper piston cylinder 5, thereby improving the service life of the device.

[0058] like Fig.11As shown in (d), before injection, the screw rod 56 is rotated to rotate and descend, driving the lifting plate 54 to slide and descend along the inner wall of the guide groove 51, so that the vertical guide groove 58 slides and descends and disengages from the guide ball 52, and the oblique guide groove 57 slides and descends to contact the guide ball 52. Under the elastic force of the connecting spring 53, the guide ball 52 is driven to move toward the oblique guide groove 57 until it is pressed against the oblique guide groove 57, pressing the first pressure sensor 59. The first pressure sensor 59 transmits a signal to the controller, and the controller controls the first warning light 61 to light up, reminding the user that the ball head 50 is now in contact with the spiral groove 48. The liquid storage part 7 does not rotate during the descent process, thereby improving the stability of the injection process; then the protective cover 18 is removed, and the needle 17 is inserted into the patient's body. By pressing the first control button 35, the annular electromagnetic suction cup 33 is controlled to lose power, thereby driving the piston column 8 to descend, and the medicine in the lower piston cylinder 6 is injected into the patient's body through the needle 17. During the descent process of the annular liquid storage box 10, the air below it is pressed into the annular cavity 37 at the bottom of the lower connecting shell 4 through the air hole 38, so that the corresponding elastic diaphragm 39 is inflated and expanded, thereby slowing down the piston column 8 to prevent the medicine from being injected too quickly.

[0059] After the injection is completed, the second control button 36 is pressed to control the annular electromagnetic suction cup 33 to be energized to attract the iron ring 34 on the top of the piston column 8, so that the top of the piston column 8 is sucked onto the top of the upper piston cylinder 5, and the screw 56 is rotated in the opposite direction to make it rotate and rise, driving the lifting plate 54 to slide and rise along the inner wall of the guide groove 51, so that the vertical guide groove 58 slides and rises to contact the guide ball 52, and the oblique guide groove 57 slides and rises and disengages from the guide ball 52. Under the elastic force of the connecting spring 53, the ball head 50 is driven to be inserted into the corresponding position of the spiral groove 48, and the guide ball 52 presses the second pressure sensor 60, and the second pressure sensor 60 transmits the signal to the controller. The controller controls the second warning light 62 to light up, ensuring that the piston column 8 drives the annular liquid storage box 10 to rotate synchronously during the liquid extraction process to rotate and stir the medicine.

[0060] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0064] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A portable pen-type injector, comprising an upper connecting portion (1) and a lower connecting portion (2) which are screwed together; characterized in that: The upper connecting part (1) comprises an upper connecting shell (3); the lower connecting part (2) comprises a lower connecting shell (4); the top of the upper connecting shell (3) is connected to an upper piston cylinder (5); the bottom of the lower connecting shell (4) is connected to a lower piston cylinder (6); A liquid storage portion (7) is slidably disposed between the inner walls of the upper connecting shell (3) and the lower connecting shell (4); the liquid storage portion (7) comprises a piston column (8) slidably disposed in the upper piston cylinder (5) and the lower piston cylinder (6); the interior of the piston column (8) is a hollow structure; a piston portion (9) slidably engaged with the piston column (8) is fixedly mounted on the top of the upper piston cylinder (5); an annular liquid storage box (10) slidably engaged with the inner walls of the upper connecting shell (3) and the lower connecting shell (4) is fixedly disposed on the outer peripheral side surface of the piston column (8); A vertical infusion groove (11) is provided inside the piston column (8); a liquid outlet pipe (12) connected to the piston column (8) is provided at the bottom of the vertical infusion groove (11); a plurality of liquid outlet holes (13) connected to the vertical infusion groove (11) are evenly provided on the inner wall of the annular liquid storage box (10); a liquid discharge pipe (14) is provided on the inner bottom surface of the piston column (8); a first one-way valve is provided on both the liquid discharge pipe (14) and the liquid outlet pipe (12); A threaded ring (15) is fixed to the bottom of the upper connecting shell (3); a threaded groove (16) threadedly connected to the threaded ring (15) is provided at the top of the lower connecting shell (4); a needle (17) is provided at the bottom of the lower piston cylinder (6); a protective sleeve (18) sleeved on the needle (17) is provided at the bottom of the lower piston cylinder (6); an exhaust pipe (19) is provided at the inner bottom surface of the lower piston cylinder (6); a breathable and water-blocking membrane is provided inside the exhaust pipe (19) near the top thereof, and a second one-way valve is provided inside the exhaust pipe (19) near the bottom thereof; a liquid injection hole (20) is provided at the top of the annular liquid storage box (10); a sealing cover (21) is threadedly connected inside the liquid injection hole (20); A receiving chamber (22) is symmetrically provided inside the upper piston cylinder (5); a return spring (23) is connected to the top of the receiving chamber (22); a lifting block (24) that is slidably matched with the receiving chamber (22) is fixed to the bottom end of the return spring (23); a first annular groove (25) is provided on the top of the annular liquid storage box (10); a second annular groove (26) is provided on the inner wall of the first annular groove (25); an annular plate (27) is rotatably provided inside the first annular groove (25); a vertical rod (28) is symmetrically fixed to the top of the annular plate (27); an annular rail that is rotatably matched with the second annular groove (26) is fixed to the outer peripheral side of the annular plate (27); a sliding column (29) that is slidably matched with the receiving chamber (22) is fixed to the top of the vertical rod (28); A control box (30) is fixedly mounted on the outer peripheral side of the upper piston cylinder (5); a battery pack and a controller are arranged inside the control box (30); a third annular groove (31) is provided on the inner top of the upper piston cylinder (5); an annular electromagnetic suction cup (32) is mounted on the inner top of the third annular groove (31); a fourth annular groove (33) is provided on the top of the piston column (8); an iron ring (34) is fixed on the inner bottom of the fourth annular groove (33); a first control button (35) and a second control button (36) are symmetrically mounted on the outer peripheral side of the upper connecting shell (3); an input end of the controller is electrically connected to the first control button (35) and the second control button (36), respectively, and an output end thereof is electrically connected to the annular electromagnetic suction cup (32).

2. A portable pen-type injector according to claim 1, characterized in that: The top of the upper connecting shell (3) and the bottom of the lower connecting shell (4) are both provided with an annular cavity (37); a plurality of air holes (38) are evenly arranged on the inner bottom surface of the annular cavity (37); an elastic diaphragm (39) is arranged between the inner walls of the annular cavity (37); and a plurality of anti-slip grooves (40) are both arranged on the outer peripheral sides of the upper connecting shell (3) and the lower connecting shell (4).

3. A portable pen-type injector according to claim 2, characterized in that: The top of the upper piston cylinder (5) is provided with a mounting groove (41); the piston portion (9) comprises a fixing plate (42) fixedly mounted in the mounting groove (41); a connecting rod (43) is fixedly passed through the top of the fixing plate (42); a piston plate (44) rotatably arranged at the bottom end of the connecting rod (43) and slidably engaged with the inner wall of the piston column (8); a limiting sleeve (45) rotatably engaged with the connecting rod (43) is fixedly arranged at the top of the piston plate (44); An L-shaped plate (46) is symmetrically fixed to the top of the piston plate (44); and a lifting groove (47) slidably matched with the L-shaped plate (46) is symmetrically opened on the inner wall of the piston column (8).

4. A portable pen-type injector according to claim 3, characterized in that: The inner wall of the piston column (8) is provided with a spiral groove (48) near the inner top thereof; an extension rod (49) is slidably provided through the inner wall of the connecting rod (43); a ball head (50) is fixed at one end of the extension rod (49) and is slidably engaged with the spiral groove (48); a guide groove (51) is provided inside the connecting rod (43); a guide ball (52) is fixed at the other end of the extension rod (49); a connecting spring (53) sleeved on the extension rod (49) is fixed between the guide ball (52) and the inner wall of the guide groove (51); A lifting plate (54) is slidably arranged inside the guide groove (51); a mounting block (55) is fixed to the top of the connecting rod (43); and a screw rod (56) is rotatably arranged on the top of the lifting plate (54) and is threadedly penetrated and rotatably matched with the mounting block (55).

5. A portable pen-type injector according to claim 4, characterized in that: The side surface of the lifting plate (54) is provided with an oblique guide groove (57) and a vertical guide groove (58) adapted to the guide ball (52) in sequence from top to bottom; a first pressure sensor (59) and a second pressure sensor (60) are respectively installed on the side surfaces of the oblique guide groove (57) and the vertical guide groove (58); a first warning light (61) and a second warning light (62) are respectively installed on the top of the mounting block (55); an input end of the controller is respectively electrically connected to the first pressure sensor (59) and the second pressure sensor (60), and an output end thereof is respectively electrically connected to the first warning light (61) and the second warning light (62).

6. The method for using a portable pen-type injector according to claim 5, characterized in that: The following steps are involved: T1. Press the first control button (35) to control the annular electromagnetic suction cup (32) to lose power. Under the elastic reset force of the reset spring (23), the lifting block (24) and the sliding column (29) are driven to slide down along the storage chamber (22), thereby driving the lifting groove (47) on the piston column (8) to slide down along the L-shaped plate (46), so that the liquid medicine in the annular liquid storage box (10) is sent into the cavity between the piston column (8) and the piston plate (44). At this time, the bottom of the piston column (8) is pressed against the inner bottom surface of the lower piston cylinder (6), completing the quantitative extraction of the liquid medicine; T2, pressing the second control button (36) to control the annular electromagnetic suction cup (32) to be energized to attract the iron ring (34) at the top of the piston column (8), so that the top of the piston column (8) is attracted to the top of the upper piston cylinder (5). When the piston column (8) rises, the piston plate (44) discharges the liquid medicine inside the piston column (8) into the lower piston cylinder (6) through the discharge pipe (14), so as to prepare for the subsequent injection of the liquid medicine, thereby realizing the isolation between the extraction of the liquid medicine and the injection of the liquid medicine; T3. Before injection, the screw rod (56) is rotated to rotate and descend, driving the lifting plate (54) to slide and descend along the inner wall of the guide groove (51), so that the vertical guide groove (58) slides and descends and disengages from the guide ball (52), and the oblique guide groove (57) slides and descends and contacts the guide ball (52). Under the elastic force of the connecting spring (53), the guide ball (52) is driven to move toward the oblique guide groove (57) until it is pressed against the oblique guide groove (57), pressing the first pressure sensor (59). The first pressure sensor (59) transmits a signal to the controller, and the controller controls the first warning light (61) to light up, reminding the user that the ball head (50) is disengaged from the spiral groove (48) at this time, and the liquid storage part (7) does not rotate during the descent process, thereby improving the stability of the injection process; T4. Remove the protective cover (18), insert the needle (17) into the patient's body, and control the annular electromagnetic suction cup (32) to lose power by pressing the first control button (35), thereby driving the piston column (8) to descend, and injecting the liquid medicine in the lower piston cylinder (6) into the patient's body through the needle (17). During the descending process of the annular liquid storage box (10), the air below it is pressed into the annular cavity (37) at the bottom of the lower connecting shell (4) through the air hole (38), so that the corresponding elastic diaphragm (39) is inflated and expanded, thereby reducing the speed of the piston column (8) to prevent the liquid medicine from being injected too quickly; T5. After the injection is completed, the second control button (36) is pressed to control the annular electromagnetic suction cup (32) to be energized to attract the iron ring (34) at the top of the piston column (8), so that the top of the piston column (8) is sucked onto the top of the upper piston cylinder (5), and the screw rod (56) is rotated in the opposite direction to rotate and rise, driving the lifting plate (54) to slide and rise along the inner wall of the guide groove (51), so that the vertical guide groove (58) slides and rises to contact the guide ball (52), and the oblique guide groove (57) slides and rises to separate from the guide ball (52). Under the elastic force of the connecting spring (53), the ball head (50) is driven to be inserted into the corresponding position of the spiral groove (48), and the guide ball (52) presses the second pressure sensor (60), and the second pressure sensor (60) transmits a signal to the controller, and the controller controls the second warning light (62) to light up. At this time, the liquid medicine can be extracted.

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