Drug delivery device

Abstract

The utility model relates to the technical field of medical instruments, and provides a drug delivery device which comprises a main body with a containing cavity and a driving assembly, and the driving assembly is installed in the containing cavity. The driving assembly comprises a mounting base, a lead screw, a push rod and a motor, the mounting base is connected with the body, the motor and the push rod are both mounted on the mounting base, the lead screw is connected with the driving end of the motor, the push rod sleeves the lead screw and is in threaded connection with the lead screw, and a push head is arranged at the end of the push rod, is in sealed connection with the push rod and is used for abutting against a medicine plug in a medicine bottle. The medicine bottle is at least partially located in the containing cavity. The driver is installed in the containing cavity of the main body, the driving assembly is protected, waterproof and dustproof effects are achieved, and water and dust are prevented from entering a product to affect the performance of the product; the whole stroke of the push rod is in the containing cavity, and the product is prevented from being damaged when falling accidentally. In addition, when the liquid medicine needs to be stored at low temperature, the medicine bottle can be detached for independent storage, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a drug delivery device. Background Art

[0002] As an indispensable part of modern medical technology, drug delivery devices mainly deliver drugs from inside the device to the target location for accurate and effective treatment. With the continuous development of medical technology, the design and functions of drug delivery devices are becoming increasingly diversified to meet different treatment needs.

[0003] Among the existing drug delivery devices, cartridge bottles are common drug storage containers and are widely favored because they are easy to carry and store. These drug delivery devices usually rely on motor-driven push rods to achieve the injection of drug solutions. When the cartridge bottle in the drug compartment needs to be replaced, the user needs to remove the old drug compartment and install a new one. However, during this process, the motor push rod is often exposed to the outside of the main body of the device, which increases the risk of the push rod damaging the motor due to falling. Especially in medical environments, the stability and reliability of the equipment are particularly important, and any minor damage may affect the smooth progress of treatment.

[0004] In addition, since many drugs need to be stored in low temperature environments to maintain their activity and stability, these drug delivery devices often need to be used in conjunction with refrigerators and other refrigeration equipment. However, the humidity inside the refrigerator is relatively high, and long-term operation in such an environment can easily damage the motors and electronic components inside the drug delivery device. Humidity can cause corrosion and short circuits in electronic components, thus affecting the normal operation of the entire device. Utility Model Content

[0005] The utility model provides a medication device, which is used to solve the problems of potential safety hazards and stability of the existing medication devices in the prior art during use.

[0006] The utility model provides a drug delivery device, comprising: a main body with a accommodating cavity and a driving component, wherein the driving component is installed in the accommodating cavity; the driving component comprises a mounting seat, a screw rod, a push rod and a motor, wherein the mounting seat is connected to the main body, the motor and the push rod are both installed on the mounting seat, the screw rod is connected to the driving end of the motor, the push rod is sleeved on the screw rod, the push rod is threadedly connected to the screw rod, a push head is provided at the end of the push rod, the push head is sealingly connected to the push rod, the push head is used to abut against the medicine plug in a medicine bottle, and the medicine bottle is at least partially located in the accommodating cavity.

[0007] According to a drug delivery device provided by the utility model, the drug delivery device also includes a control panel, a display assembly and a battery assembly; the control panel is arranged in the accommodating cavity, the driving assembly also includes an encoder, the encoder is connected to the driving shaft of the motor, and the encoder and the motor are electrically connected to the control panel respectively; the main body is provided with a mounting port, the display assembly is installed at the mounting port, and the display assembly is electrically connected to the control panel; the battery assembly is arranged in the accommodating cavity, the control panel and the motor are electrically connected to the battery assembly respectively, and the main body is provided with a charging port, and the battery assembly is electrically connected to an external device through the charging port.

[0008] According to a drug delivery device provided by the utility model, the control panel is also provided with buttons, and the buttons include an on / off button, an injection button and a plurality of control buttons. The main body is provided with a plurality of through holes, and the plurality of through holes correspond to the buttons one by one. The buttons are at least partially arranged outside the main body through the through holes. The drug delivery device also includes a sealing sleeve, and the sealing sleeve is arranged between each of the buttons and the outer wall surface of the main body, and the sealing sleeve is sealed and connected to the outer wall surface of the main body.

[0009] According to a medication device provided by the utility model, the medication device further comprises an anti-collision component, and the anti-collision component is arranged at an end of the main body away from the pusher head.

[0010] According to a drug delivery device provided by the utility model, the main body includes a first shell and a second shell, and the first shell and the second shell are detachably connected to form the accommodating cavity.

[0011] According to a drug delivery device provided by the utility model, the drug delivery device also includes a medicine bin and a fixed cylinder, the medicine bin is detachably connected to the main body, the fixed cylinder is arranged in the medicine bin, the fixed cylinder is detachably connected to the main body, and the first end of the fixed cylinder is located in the accommodating cavity; the first end of the fixed cylinder is provided with a clamping portion, and the clamping portion is used to clamp with the matching portion of the medicine bottle; the open end of the medicine bottle is interference fit with the second end of the fixed cylinder so that the medicine bottle can be installed in the fixed cylinder.

[0012] According to a drug delivery device provided by the utility model, the drug delivery device further comprises a positioning cylinder, wherein the positioning cylinder is arranged in the accommodating cavity, and the positioning cylinder is coaxially arranged with the fixing cylinder for limiting the position of the fixing cylinder.

[0013] According to a drug delivery device provided by the utility model, a first viewing window is provided on the fixed cylinder, and a second viewing window is provided on the medicine bin, and the first viewing window and the second viewing window are arranged in a one-to-one correspondence.

[0014] According to a drug delivery device provided by the utility model, the drug delivery device also includes a hidden needle assembly, the hidden needle assembly includes a fixing part, an elastic part and a pressing part, the fixing part is clamped on the inner side wall of the medicine chamber, the pressing part is slidably connected to the side wall of the fixing part, the elastic part is located between the fixing part and the pressing part, and the two ends of the elastic part are respectively abutted against the fixing part and the pressing part; the input end of the needle assembly is connected to the medicine bottle through the hidden needle assembly, the pressing part moves back and forth along the axis of the fixed cylinder, and the output end of the needle assembly is located inside the pressing part, or protrudes outside the pressing part.

[0015] According to a drug delivery device provided by the utility model, the drug delivery device also includes an end cap, and the end cap covers the hidden needle assembly and fits with the end of the medicine chamber.

[0016] The drug delivery device provided by the utility model protects the drive assembly by installing the drive in the accommodating cavity of the main body, thereby achieving waterproof and dustproof properties and preventing water and dust from entering the interior of the product and affecting product performance. The entire stroke of the push rod is within the accommodating cavity to prevent damage to the product when it accidentally falls. In addition, when the medicine liquid needs to be stored at a low temperature, the medicine bottle can be detached for separate storage, which is highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a cross-sectional view of the drug delivery device provided by the utility model;

[0019] Figure 2 This is one of the exploded views of the drug delivery device provided by the utility model;

[0020] Figure 3 This is the second exploded view of the drug delivery device provided by the utility model;

[0021] Figure 4 It is a partial exploded view of the drug delivery device provided by the utility model;

[0022] Figure 5 It is a structural schematic diagram of the main body provided by the utility model;

[0023] Figure 6 The utility model provides Figure 5 A partial enlarged view of the middle A area;

[0024] Figure 7 It is a cross-sectional view of the main body provided by the utility model;

[0025] Figure 8 It is an exploded view of the main body provided by the utility model;

[0026] Fig. 9 It is an exploded view of the drive assembly provided by the utility model installed in the main body;

[0027] Fig.10 It is a structural schematic diagram of the drive assembly provided by the utility model;

[0028] Fig.11 It is a right side view of the driving assembly provided by the utility model;

[0029] Fig.12 It is a left view of the drive assembly provided by the utility model;

[0030] Fig.13 It is a structural schematic diagram of the medicine bin provided by the utility model;

[0031] Fig.14 This is an exploded view of the hidden needle assembly provided by the utility model installed in the medicine bin;

[0032] Fig.15 It is a structural schematic diagram of the fixing cylinder provided by the utility model;

[0033] Reference numerals:

[0034] 10. Main body; 11. Charging port; 12. Mounting port; 13. First housing; 131. Main body; 132. Panel; 14. Second housing; 15. Fastener; 16. Cover plate; 17. Positioning boss;

[0035] 20. driving assembly; 21. mounting seat; 211. matching part; 22. screw rod; 23. push rod; 231. limiting part; 24. push head; 25. motor; 26. reduction box;

[0036] 30. Control panel; 31. On / off key; 32. Control key; 33. Injection key; 34. Sealing sleeve; 40. Display assembly; 41. Double-sided tape; 42. Mounting bracket;

[0037] 50. Battery assembly; 60. Anti-collision parts;

[0038] 71, fixing cylinder; 711, clamping part; 712, first viewing window; 72, medicine chamber; 721, second viewing window; 73, positioning cylinder;

[0039] 80. hidden needle assembly; 81. fixing member; 82. elastic member; 83. pressing member;

[0040] 90. Needle assembly; 100. End cap; 110. Medicine bottle; 111. Medicine stopper. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0047] Combine the following Figures 1 to 15 The drug delivery device of the present invention is described.

[0048] The drug delivery device provided in the embodiment of the utility model comprises: a main body 10 having a receiving cavity and a drive assembly 20, wherein the drive assembly 20 is installed in the receiving cavity, such as Fig. 9 The drive assembly 20 includes a mounting seat 21, a screw rod 22, a push rod 23 and a motor 25. Fig.10 The mounting seat 21 is connected to the main body 10, the motor 25 and the push rod 23 are both mounted on the mounting seat 21, the screw rod 22 is connected to the driving end of the motor 25, the push rod 23 is sleeved on the screw rod 22, the push rod 23 is threadedly connected to the screw rod 22, and a push head 24 is provided at the end of the push rod 23, and the push head 24 is sealed and connected to the push rod 23, as shown. Figure 1 As shown, the push head 24 is used to abut against the medicine plug 111 in the medicine bottle 110, and the medicine bottle 110 is at least partially located in the accommodating cavity.

[0049] refer to Fig. 9 The driving assembly 20 is installed in the accommodating cavity of the main body 10 through the mounting seat 21 to protect the motor 25. Specifically, the driving shaft of the motor 25 is connected to the screw 22 through the reduction box 26, and the push rod 23 is threadedly connected to the outer wall of the screw 22. The push rod 23 is provided with a limiting portion 231 (such as a boss), and the mounting seat 21 is provided with a matching portion 211 (such as a groove). Fig.11 and Fig.12 As shown, the limiting portion 231 matches the matching portion 211 , thereby limiting the rotational freedom of the push rod 23 ; the motor 25 is started, the screw rod 22 rotates, and drives the push rod 23 to move back and forth along its axis.

[0050] Furthermore, a push head 24 is provided at the end of the push rod 23, and the push head 24 is sealed and connected to the push rod 23, so that the screw rod 22 is sealed in the structure surrounded by the push rod 23 and the push head 24, preventing the screw rod 22 from contacting the outside, and achieving radial waterproofing. An opening is provided at the end of the main body 10, as shown in Figure 1, and the medicine bottle 110 can be at least partially arranged in the accommodating cavity through the opening, and the push head 24 abuts against the medicine plug 111 in the medicine bottle 110 to push the medicine plug 111 to move.

[0051] In the actual operation process, the control motor 25 is started, the motor 25 drives the screw rod 22 to rotate, and drives the push head 24 of the push rod 23 to move along the axial direction of the screw rod 22. The push head 24 abuts against the medicine plug 111 in the medicine bottle 110, so that the liquid medicine in the medicine bottle 110 overflows from the output end of the needle assembly 90, that is, the action of exhausting and finding the medicine plug 111 is realized. Further, the motor 25 continues to drive the screw rod 22 to rotate, driving the push rod 23 to continue to move along the axial direction (injection direction) of the screw rod 22, and the push rod 23 squeezes the medicine plug 111 in the medicine bottle 110, and then injects the liquid medicine into the human body through the needle assembly 90.

[0052] The drug delivery device provided by the embodiment of the utility model protects the drive assembly 20 by installing the drive in the accommodating cavity of the main body 10, thereby achieving waterproof and dustproof properties and preventing water and dust from entering the interior of the product and affecting product performance. The entire stroke of the push rod 23 is within the accommodating cavity to prevent damage to the product when it accidentally falls. In addition, when the medicine solution needs to be stored at a low temperature, the detachable medicine bottle 110 can be stored separately, which is highly safe.

[0053] The drug delivery device provided in the embodiment of the utility model further includes a control panel 30, such as Figure 4 As shown, the control board 30 is disposed in the accommodating chamber, and can be connected to the motor 25 or to the inner wall of the accommodating chamber; the control board 30 is electrically connected to the motor 25, and the operating parameters of the motor 25 can be controlled by the control board 30. For example, a circuit board is provided on the motor 25 for processing signals, and the control board 30 controls the operating parameters of the motor 25 according to demand, thereby adjusting the injection speed and injection volume.

[0054] The drive assembly 20 also includes an encoder, which is connected to the drive shaft of the motor 25. After the motor 25 drives the reduction box 26 to reduce speed, it drives the screw 22 to rotate, thereby driving the push rod 23 to move linearly. The encoder rotates at the same time. The encoder can obtain the operating parameters of the drive shaft, such as the rotation speed and the number of rotations, and obtain the injection volume and injection speed. The encoder is connected to the control board 30, and the control board 30 can receive the parameters obtained by the encoder. The control board 30 can adjust the operating parameters of the motor 25 based on the data information obtained by the encoder.

[0055] The drug delivery device provided in the embodiment of the present utility model further includes a display assembly 40. Figure 4As shown, the main body 10 is provided with a mounting port 12, and the display component 40 is installed at the mounting port 12. The display component 40 is glued to the mounting frame 42 (such as by double-sided tape 41 or glue, which can be waterproof), and is installed at the mounting port 12, and the display component 40 is connected to the control board 30 through the mounting frame 42, and the display component 40 and the control board 30 form a whole. The display component 40 can display the remaining amount of medicine in real time. When the set amount of medicine is greater than the remaining amount of medicine, the system will give a prompt to cancel the injection or continue the injection, and prompt how many doses are not injected in this injection, reminding the user to replace the medicine bottle 110, so as to ensure the accuracy of the injection dose. It should be noted that each time the medicine bottle is replaced, the initial dose needs to be updated, and the remaining dose is displayed based on the injection amount.

[0056] The drug delivery device provided by the embodiment of the utility model further includes a battery assembly 50, which is disposed in the accommodating cavity, and the control board 30 and the motor 25 are electrically connected to the battery assembly 50 respectively to supply power to the control board 30 and the motor 25. In addition, the control board 30 can also obtain the power of the battery assembly 50, and display the power of the battery through the display assembly 40, so that the user can replenish the power of the battery assembly 50 in time.

[0057] The main body 10 is also provided with a charging port 11, which is arranged near the battery assembly 50. The battery assembly 50 can be electrically connected to an external device through the charging port 11 to charge the battery. The drug delivery device also includes a cover plate 16, which covers the charging port 11. When the battery needs to be charged, the cover plate 16 is opened; after charging is completed, the cover plate 161 is covered on the charging port 11 to prevent dust and water from entering.

[0058] The control panel 30 in the embodiment of the utility model is also provided with buttons, including a switch button 31, an injection button 33 and a plurality of control buttons 32. The user can increase or decrease the amount of medicine through the corresponding buttons, and can also return to the main page, confirm injection and other functions; the main body 10 is provided with a plurality of through holes, and the plurality of through holes correspond to the buttons one by one; the buttons are at least partially arranged outside the main body 10 through the through holes, so that the user can control the drug delivery device through the buttons. The position of the buttons in the embodiment of the utility model is not specifically limited, such as Figure 5 As shown, the switch key 31 and the control key 32 may be disposed on the upper surface of the first housing, and the injection key 33 may be disposed on the side wall of the first housing 13 .

[0059] Furthermore, the drug delivery device also includes a sealing sleeve 34, and a sealing sleeve 34 is provided between each button and the outer wall surface of the main body 10. The sealing sleeve 34 is sealed and connected to the outer wall surface of the main body 10, such as by fixing with glue or ultrasonic welding process, which can effectively prevent water and dust from entering the interior of the main body 10 and affecting its normal function and performance.

[0060] One or more adjacent buttons in the embodiment of the utility model can be sealed by a sealing sleeve 34, such as four buttons are fixedly connected to the outer wall of the main body 10 by glue through a four-piece sealing sleeve 34, such as Figure 4 and Figure 7 As shown; to prevent the glue from overflowing into the key slot between two adjacent keys and causing the keys to get stuck, the double-sided adhesive tape 41 can be used to connect the outer wall of the main body 10. To strengthen the connection, the quadruple sealing sleeve 34 can also be connected to the main body 10 by screws. On the inner wall of the main body 10, the position corresponding to the screws is sealed by the sealing sleeve 34, which has a good waterproof effect. The sealing sleeve 34 in the embodiment of the utility model can be a silicone sealing sleeve.

[0061] The drug delivery device provided in the embodiment of the utility model further includes an anti-collision member 60, which is arranged at the end of the main body 10 away from the push head 24 and can be connected by bonding, such as double-sided tape 41, glue, etc. When the drug delivery device falls, it plays a buffering role and protects the drug delivery device to a certain extent. The anti-collision member 60 in the embodiment of the utility model can also be a decorative member.

[0062] The main body 10 provided in the embodiment of the utility model comprises a first shell 13 and a second shell 14, and the first shell 13 and the second shell 14 are detachably connected to form a receiving cavity. Figure 4 , Figure 8 and Fig. 9 As shown, the end of the first shell 13 and the end of the second shell 14 are fixed by a fastener 15, and the fastener 15 can be a clamp. The end of the first shell 13 and the end of the second shell 14 are both provided with external threads, and the clamp is provided with internal threads. The clamp is connected to the first shell 13 and the second shell 14 through threads. A positioning boss 17 is provided on the external threads of the first shell 13 and the second shell 14, and a positioning groove is provided on the internal threads of the clamp. The positioning boss 17 and the positioning groove cooperate to position the clamp in the circumferential direction. The middle part of the first shell 13 and the second shell 14 can be connected by a snap-fit ​​method, and the tail can be connected and fixed by screws. A sealing sleeve 34 is provided at the end of the screw, and the sealing sleeve 34 is covered on the screw to achieve waterproofing.

[0063] In one embodiment, Figure 1 and 4 As shown, the control board 30 is arranged on the first shell 13, and the first shell 13 includes a body 131 and a panel 132. The body 131 is provided with an opening, and the panel 132 is glued to the body 131. The panel 132 is provided with a mounting port 12, and the display assembly 40 is mounted on the mounting port 12. The display assembly 40 is glued to the mounting frame 42, and the mounting frame 42 is connected to the control board 30. The motor 25 and the mounting seat 21 are installed on the inner wall of the second shell 14. The battery assembly 50 is glued to the inner wall of the second shell 14, such as by double-sided tape 41, glue, etc.

[0064] like Figure 1 , Figure 2 As shown, the drug delivery device provided by the embodiment of the utility model further includes a drug bin 72 and a fixed cylinder 71, the drug bin 72 is detachably connected to the main body 10, the fixed cylinder 71 is disposed in the drug bin 72, the fixed cylinder 71 is detachably connected to the main body 10, and the first end of the fixed cylinder 71 is located in the accommodating cavity. Figure 2 As shown, the main body 10 is provided with an external thread, and the medicine chamber 72 is provided with an internal thread. Fig.13 As shown, the main body 10 and the medicine chamber 72 are connected by threads. The fixed cylinder 71 is arranged in the medicine chamber 72, the middle part of the fixed cylinder 71 is provided with an external thread, the main body 10 is provided with an internal thread, the fixed cylinder 71 and the medicine chamber 72 are connected by threads, and the first end of the fixed cylinder 71 is located in the accommodating cavity, as shown in FIG. Figure 1 and Figure 2 It should be noted that when the thread is connected, the external thread and the internal thread are provided with matching positioning structures, such as Figure 5 and Figure 6 As shown, a positioning table 17 is provided on the internal thread to determine its relative position.

[0065] The first end of the fixing tube 71 is provided with a clamping portion 711, such as an elastic buckle. Fig.15 As shown, the medicine bottle 110 can be a card-type medicine bottle 110, and the card-type medicine bottle has a matching portion 211, and the clamping portion 711 is clamped with the matching portion 211 of the medicine bottle 110; the open end of the medicine bottle 110 is interference-fitted with the second end of the fixed cylinder 71 so that the medicine bottle 110 is installed in the fixed cylinder 71. The embodiment of the utility model can achieve double protection to prevent the medicine bottle 110 from accidentally falling and being damaged. It should be noted that the medicine bottle 110 is provided with a medicine plug 111 in one end of the accommodating cavity, and the medicine plug 111 is in contact with the push head 24 of the push rod 23; the open end of the medicine bottle 110 is provided with an aluminum cover, and the needle assembly 90 can be connected to the medicine bottle 110 through the aluminum cover.

[0066] Furthermore, the drug delivery device provided in the embodiment of the utility model further includes a positioning cylinder 73, such as Figure 4 As shown, the positioning cylinder 73 is arranged in the accommodating cavity, and the positioning cylinder 73 and the fixing cylinder 71 are arranged coaxially. When the fixing cylinder 71 is installed, the positioning cylinder 73 plays a guiding role, limits the position of the fixing cylinder 71, and facilitates the installation of the fixing cylinder 71.

[0067] The fixing cylinder 71 in the embodiment of the present invention is provided with a first viewing window 712. Fig.15 As shown, the medicine bin 72 is provided with a second viewing window 721. Fig.13 and Fig.14As shown, the first window 712 and the second window 721 are arranged in a one-to-one correspondence. Specifically, the first window 712 and the second window 721 can be made of transparent materials (acrylic or PC, etc.), and the user can clearly and directly observe the liquid medicine in the medicine bottle 110 through the first window 712 and the second window 721.

[0068] The drug delivery device provided in the embodiment of the utility model further includes a hidden needle assembly 80, which is mounted on the drug bin 72. Fig.14 As shown, the hidden needle assembly 80 includes a fixing member 81, an elastic member 82 and a pressing member 83. The fixing member 81 is clamped on the inner side wall of the medicine bin 72. The fixing member 81 is clamped on the fixing hole on the side wall of the medicine bin 72. The pressing member 83 is slidably connected to the side wall of the fixing member 81. The elastic member 82 is located between the fixing member 81 and the pressing member 83. The two ends of the elastic member 82 are respectively in contact with the fixing member 81 and the pressing member 83.

[0069] It should be noted that both the pressing member 83 and the fixing member 81 are provided with through holes, and the input end of the needle assembly 90 is connected to the medicine bottle 110 through the through hole on the hidden needle assembly 80. The pressing member 83 moves back and forth along the axis of the fixing cylinder 71, and the output end of the needle assembly 90 is located inside the pressing member 83, or protrudes outside the pressing member 83.

[0070] During injection, the pressing member 83 contacts the skin and moves along the axis of the fixed cylinder 71. The elastic member 82 is compressed, and the end of the pressing member 83 gradually approaches the end of the fixed cylinder 71. The needle assembly 90 is exposed and penetrates the skin, eliminating the fear of injection.

[0071] It should be noted that when installing the needle assembly 90 , the medicine chamber 72 needs to be removed, and the needle assembly 90 needs to be installed on the fixed cylinder 71 . After completion, the hidden needle assembly 80 can be installed.

[0072] The drug delivery device provided in the embodiment of the utility model further comprises an end cap 100, such as Figure 1 and Figure 2 As shown, the end cap 100 covers the hidden needle assembly 80 and fits with the end of the medicine bin 72. In one embodiment, the inner wall of the end cap 100 is provided with an internal thread, the end of the medicine bin 72 is provided with an external thread, the end cap 100 is threadedly connected with the medicine bin 72, and the end cap 100 fits with the end surface of the end of the medicine bin 72. It should be noted that a positioning boss is provided on the external thread, and a positioning groove is provided on the internal thread, and the two match to achieve precise installation.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A drug delivery device, characterized in that: include: A main body having a receiving cavity and a driving assembly, wherein the driving assembly is installed in the receiving cavity; The driving assembly includes a mounting seat, a screw, a push rod and a motor, the mounting seat is connected to the main body, the motor and the push rod are both installed on the mounting seat, the screw is connected to the driving end of the motor, the push rod is sleeved on the screw, the push rod is threadedly connected to the screw, a push head is provided at the end of the push rod, the push head is sealingly connected to the push rod, the push head is used to abut against the medicine plug in the medicine bottle, and the medicine bottle is at least partially located in the accommodating cavity.

2. The drug delivery device according to claim 1, characterized in that: The drug delivery device also includes a control panel, a display assembly and a battery assembly; The control board is arranged in the accommodating cavity, and the driving assembly further comprises an encoder, the encoder is connected to the driving shaft of the motor, and the encoder and the motor are electrically connected to the control board respectively; The main body is provided with a mounting opening, the display assembly is mounted on the mounting opening, and the display assembly is electrically connected to the control board; The battery assembly is arranged in the accommodating cavity, the control board and the motor are electrically connected to the battery assembly respectively, a charging port is provided on the main body, and the battery assembly is electrically connected to an external device through the charging port.

3. The drug delivery device according to claim 2, characterized in that: The control panel is also provided with buttons, including a switch button, an injection button and a plurality of control buttons. The main body is provided with a plurality of through holes, and the plurality of through holes correspond to the buttons one by one. The buttons are at least partially arranged outside the main body through the through holes. The drug delivery device further comprises a sealing sleeve, wherein the sealing sleeve is arranged between each of the buttons and the outer wall surface of the main body, and the sealing sleeve is sealedly connected to the outer wall surface of the main body.

4. The drug delivery device according to claim 1, characterized in that: The drug delivery device further comprises an anti-collision member, which is arranged at one end of the main body away from the pusher head.

5. The drug delivery device according to any one of claims 1 to 4, characterized in that: The main body includes a first shell and a second shell, and the first shell and the second shell are detachably connected to form the accommodating cavity.

6. The drug delivery device according to claim 5, characterized in that: The drug delivery device further comprises a medicine bin and a fixed cylinder, wherein the medicine bin is detachably connected to the main body, the fixed cylinder is disposed in the medicine bin, the fixed cylinder is detachably connected to the main body, and the first end of the fixed cylinder is located in the accommodating cavity; A clamping portion is provided at the first end of the fixed tube, and the clamping portion is used to clamp with the matching portion of the medicine bottle; the open end of the medicine bottle is interference fit with the second end of the fixed tube so that the medicine bottle can be installed in the fixed tube.

7. The drug delivery device according to claim 6, characterized in that: The drug delivery device further comprises a positioning cylinder, which is disposed in the accommodating cavity and is coaxially arranged with the fixing cylinder to limit the position of the fixing cylinder.

8. The drug delivery device according to claim 6, characterized in that: The fixed cylinder is provided with a first viewing window, and the medicine bin is provided with a second viewing window, and the first viewing window and the second viewing window are arranged in a one-to-one correspondence.

9. The drug delivery device according to claim 6, characterized in that: The drug delivery device further comprises a hidden needle assembly, the hidden needle assembly comprising a fixing member, an elastic member and a pressing member, the fixing member is clamped on the inner side wall of the medicine bin, the pressing member is slidably connected to the side wall of the fixing member, the elastic member is located between the fixing member and the pressing member, and two ends of the elastic member are respectively in contact with the fixing member and the pressing member; The input end of the needle assembly is connected to the medicine bottle through the hidden needle assembly, the pressing part moves back and forth along the axis of the fixed cylinder, and the output end of the needle assembly is located inside the pressing part, or protrudes outside the pressing part.

10. The drug delivery device according to claim 9, characterized in that: The drug delivery device further comprises an end cap, which covers the hidden needle assembly and fits the end of the drug chamber.

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