Electronic injection pen

Abstract

The utility model relates to the field of medical instruments, and provides an electronic injection pen which comprises a main body, a protective sleeve, a hidden needle and a hidden needle cap, the protective sleeve is fixed on the main body, a clamping type bottle is fixedly installed in the protective sleeve, the hidden needle is inserted in the clamping type bottle, a first driving piece is installed in the main body, and a driving shaft of the first driving piece abuts against a piston of the clamping type bottle; the hidden needle cap is telescopically arranged at one end, far away from the main body, of the protective sleeve, and is provided with a through hole for the hidden needle to pass through; when injection is needed, the hidden needle cap retracts into the protective sleeve under the contact of the skin, the hidden needle penetrates through the through hole and penetrates into the skin to complete injection, the hidden needle is not exposed, and the fear of an injection person is relieved; after injection is completed, the hidden needle cap automatically extends out of the protective sleeve, and the hidden needle is contained in the containing cavity, so that the hidden needle is prevented from being mistakenly touched due to exposure, and the possibility that the hidden needle is damaged is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, relate to a kind of electronic injection pen. BACKGROUND

[0002] Electronic injection pen is a kind of modern medical equipment, for helping patient self-injection medicine, especially suitable for the patient who needs to inject medicine frequently, such as diabetic patient. At present, the needle of most electronic injection pen is usually in the form of exposure to the skin of human body, not only can bring certain fear psychology to the person who injects, but also the exposed needle is easy to be touched and contacted with the skin of human body when not needing to inject, causing the pollution and damage of the needle. SUMMARY

[0003] The utility model provides an electronic injection pen to solve the problem that the needle of current electronic injection pen is easy to touch the skin of human body, and is easy to pollute and damage.

[0004] The utility model provides an electronic injection pen, it includes: main part, protective sleeve, needle and needle cap, the protective sleeve is fixed in the main part, the protective sleeve is fixedly installed with cassette bottle, the needle is inserted in the cassette bottle, the first drive piece is installed in the main part, and the driving shaft of the first drive piece and the piston of the cassette bottle abut;The needle cap is telescopically arranged at the end of the protective sleeve away from the main part, and the needle cap has the through hole for the needle to pass through;

[0005] When the needle is in the injection state, the needle cap is retracted into the protective sleeve, and the needle passes through the through hole;When the needle is in the storage state, the needle cap is extended outside the protective sleeve, and the needle is stored in the storage cavity of the needle cap.

[0006] According to the electronic injection pen provided by the utility model, the limiting piece and the elastic piece are further arranged, one end of the elastic piece is fixedly connected with the protective sleeve, the other end is fixedly connected with the needle cap, the needle cap is provided with a convex table, the end of the protective sleeve away from the main part is provided with a limiting edge, and the limiting piece is movably arranged in the protective sleeve.

[0007] When the needle is in the storage state, the limiting piece and the convex table abut, and the convex table is tightly abutted to the limiting edge;When the needle is in the injection state, the limiting piece is separated from the convex table, and the needle cap moves inward relative to the protective sleeve.

[0008] The utility model provides a kind of electronic injection pen further comprising second driving element and gear, the second driving element is fixed in the inside of the protective sleeve, the limiting piece is rack, the axial direction of the rack and the radial direction of the protective sleeve are parallel, the gear is sleeved on the drive shaft of the second driving element, the rack and the gear are engaged.

[0009] The utility model provides a kind of electronic injection pen further comprising ranging sensor, temperature sensor and control panel, the ranging sensor and the temperature sensor are respectively fixed in the protective sleeve close to one end of the needle, the ranging sensor and the temperature sensor are respectively electrically connected with the control panel, the control panel is electrically connected with the second driving element.

[0010] The utility model provides a kind of electronic injection pen further comprising mounting cover, the mounting cover is covered in the outer lateral wall of the protective sleeve, the second driving element is located in the installation cavity of the mounting cover, the outer lateral wall of the protective sleeve is equipped with the connecting hole for the rack to pass through, the rack is equipped with protrusion;When the needle is in the storage state, the rack is extended in the connecting hole and is arranged with the boss, and the protrusion is arranged with the outer lateral wall of the protective sleeve;When the needle is in the injection state, the rack is retracted in the connecting hole, and the end of the rack away from the boss is arranged with the top wall of the mounting cover.

[0011] The utility model provides a kind of electronic injection pen further comprising fixing cylinder and needle seat, the fixing cylinder and the needle seat are respectively fixed in the protective sleeve, the fixing cylinder is sleeved in the outside of the card type bottle, at least part of the fixing cylinder is inserted in the main body, the fixing cylinder has outer thread, the needle seat has inner thread matched with the outer thread, the needle seat and the fixing cylinder are threadedly connected, and the needle is inserted in the card type bottle through the needle seat.

[0012] The utility model provides a kind of electronic injection pen further comprising positioning cylinder, the positioning cylinder is fixedly installed in the main body, the fixing cylinder, the positioning cylinder and the drive shaft of the driving element are coaxially arranged, one end of the fixing cylinder in the main body is fixedly inserted in one end of the positioning cylinder, and the drive shaft of the first driving element is slidably inserted in the other end of the positioning cylinder.

[0013] The utility model provides a kind of electronic injection pen, and the main body has first internal thread section, the first internal thread section is equipped with positioning protrusion, the fixing cylinder has first outer thread section matched with the first internal thread section, the first outer thread section is equipped with positioning groove, the first outer thread section and the first internal thread section are threadedly connected, with the rotation of the first outer thread section, the positioning protrusion is inserted in the positioning groove.

[0014] The utility model provides an electronic injection pen, one end of the main part is close to the protective sleeve and is provided with a limiting table, the limiting table and the end face of the main part form an abutting surface,

[0015] The limiting table has a second external thread segment, the second external thread segment is provided with a limiting groove, the protective sleeve has a second internal thread segment matched with the second external thread segment, the second internal thread segment is provided with a limiting protrusion, the second external thread segment and the second internal thread segment are threadedly connected, with the screwing of the second internal thread segment, the limiting protrusion is inserted into the limiting groove, and the end face of the protective sleeve and the abutting surface are in abutment.

[0016] The utility model provides an electronic injection pen further includes the protection cap, the protection cap is detachably covered in the protective sleeve away from one end of the main part, in the case where the protection cap is covered in the protective sleeve, the needle cover is accommodated in the containing cavity of the protection cap.

[0017] The utility model provides an electronic injection pen, the needle is inserted into the cassette bottle, the first driving part is installed in the main part, the driving shaft of first driving part and the piston of cassette bottle abut, so as to drive the piston to move towards the needle by first driving part, thereby injecting the medicine in cassette bottle into human body through the needle, when needing to inject, the needle cover is in contact with the part to be injected of human body, the needle cover is inwards contracted to the protective sleeve under the action of external force, the needle is pierced into the skin of human body to complete injection through the through hole, the whole injection process is not exposed, which alleviates the fear of the person who injects to a certain extent, when completing injection, the needle cover is separated from human body and is automatically extended out of the protective sleeve, and the needle is accommodated in the containing cavity of needle cover, thereby preventing the needle from being touched by mistake due to exposure, and the possibility of needle damage is reduced. ACCURACY

[0018] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0019] Figure 1 It is the structure explosion drawing of the electronic injection pen provided by the utility model.

[0020] Figure 2 It is the overall structure schematic view of the electronic injection pen provided by the utility model.

[0021] Figure 3 It is the partial sectional view of the electronic injection pen provided by the utility model when the needle is in the storage state.

[0022] Figure 4 is a partial sectional view of the electronic injection pen in the injection state of the hidden needle.

[0023] Figure 5 is one of the partial structure schematic diagrams of the electronic injection pen.

[0024] Figure 6 is the second partial structure schematic diagram of the electronic injection pen.

[0025] Figure 7 is the third partial structure schematic diagram of the electronic injection pen.

[0026] Figure 8 is the fourth partial structure schematic diagram of the electronic injection pen.

[0027] Figure 9 is the fifth partial structure schematic diagram of the electronic injection pen.

[0028] Reference signs:

[0029] 1, main body; 11, first driving piece; 12, control panel; 13, first internal thread section; 131, positioning protrusion; 14, limiting table; 141, second external thread section; 1411, limiting groove; 15, abutting surface; 16, power supply; 17, multifunctional key; 18, top cover; 19, bottom cover; 10, connecting table; 101, third external thread section; 1011, locking groove;

[0030] 2, protective sleeve; 21, cassette bottle; 22, limiting piece; 221, protrusion; 23, elastic piece; 24, spring stop sleeve; 25, limiting edge; 26, second driving piece; 27, gear; 28, mounting cover; 281, protective cover; 29, connecting hole; 20, second internal thread section; 201, limiting protrusion;

[0031] 3, hidden needle; 31, hidden needle seat; 4, hidden needle cap; 41, through hole; 42, boss;

[0032] 5, distance measuring sensor; 6, temperature measuring sensor; 7, fixed cylinder; 71, first external thread section; 711, positioning groove; 72, tongue; 73, buckle; 74, clamp; 8, positioning cylinder; 9, protective cap. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0034] The features of the terms "first", "second" in the description and claims of the utility model can be explicitly or implicitly included one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specified. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0035] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] In the description of the utility model, it is necessary to explain that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] The utility model embodiment provides an electronic injection pen, which will be described in detail in combination with Figures 1-9 , through specific embodiments and application scenarios.

[0038] As shown in Figure 1 and Figure 2 , the utility model provides an electronic injection pen, which comprises a main body 1, a protective sleeve 2, a hidden needle 3 and a hidden needle cap 4. The protective sleeve 2 is fixed to the main body 1. As shown in Figure 3 and Figure 4As shown, a cassette bottle 21 is fixedly installed in the protective sleeve 2. The needle 3 is inserted in the cassette bottle 21. As shown Figure 5 As shown, a first driving member 11 is installed in the main body 1. The driving shaft of the first driving member 11 abuts against the piston of the cassette bottle 21. The needle cap 4 is telescopically arranged at the end of the protective sleeve 2 away from the main body 1. As shown Figure 3 As shown, the needle cap 4 has a through hole 41 through which the needle 3 passes.

[0039] As shown Figure 4 As shown, when the needle 3 is in the injection state, the needle cap 4 is retracted into the protective sleeve 2, and the needle 3 passes through the through hole 41. As shown Figure 3 As shown, when the needle 3 is in the storage state, the needle cap 4 is extended out of the protective sleeve 2, and the needle 3 is stored in the storage cavity of the needle cap 4.

[0040] As shown Figure 3 As shown, the cassette bottle 21 is fixedly installed in the interior of the protective sleeve 2. One end of the protective sleeve 2 is fixed to the main body 1, so that the interior of the protective sleeve 2 and the interior of the main body 1 are in communication. The cassette bottle 21 is used to store liquid medicine. The driving shaft of the first driving member 11 abuts against the piston of the cassette bottle 21. The first driving member 11 is used to drive the piston to move in the direction close to the needle 3, so that the liquid medicine in the cassette bottle 21 is injected from the needle 3, thereby completing the automatic injection of the electronic injection pen.

[0041] As shown Figure 5 As shown, a control board 12 and a power supply 16 are fixedly installed in the main body 1. A plurality of function keys are arranged on the main body 1, and the plurality of function keys are respectively electrically connected to the control board 12. The control board 12 is electrically connected to the first driving member 11. The power supply 16 is respectively electrically connected to the control board 12 and the first driving member 11.

[0042] Among them, the multi-function key 17 can be an injection key, a dose increase key, a dose decrease key or a return key, etc. Each multi-function key 17 is respectively electrically connected to the control board 12, and the control board 12 is electrically connected to the first driving member 11. The user can control the control board 12 to make corresponding function response by triggering the multi-function key 17. For example, the user triggers the injection key, and the control board 12 can immediately control the first driving member 11 to start, and the driving shaft of the first driving member 11 drives the piston to move, so that the liquid medicine is injected from the needle 3 into the human body.

[0043] As shown Figure 2 As shown, the needle cap 4 is located at the end of the protective sleeve 2 away from the main body 1. The end of the protective sleeve 2 away from the main body 1 is provided with a fixing hole. One end of the needle 3 is inserted into the cassette bottle 21, and the other end extends out of the fixing hole. When the needle 3 is in the storage state, the needle cap 4 is extended out of the fixing hole, and the needle 3 is covered in the storage cavity of the needle cap 4, thereby achieving physical protection of the needle 3.

[0044] When injection is needed, the electronic injection pen is held in hand, the needle cap 4 is pressed to the injection site of the human body, the needle cap 4 is retracted into the protective sleeve 2 from the fixed hole under the pressure of the injection site of the human body, at the same time, the needle 3 penetrates through the through hole 41 and directly penetrates into the skin of the human body, then the injection key is triggered, and the injection of the medicine is completed. After the injection is completed, the needle 3 is switched from the injection state to the storage state, the needle cap 4 is automatically extended out of the through hole 41 after being separated from the human body, and the needle 3 is stored in the needle cap 4. During the whole injection process, the needle 3 is not exposed, so that the fear of the injection person can be reduced to a certain extent.

[0045] The utility model provides a kind of electronic injection pen, needle 3 is inserted in cassette bottle 21, first driving part 11 is installed in main body 1, the driving shaft of first driving part 11 and the piston of cassette bottle 21 abut, so as to drive piston to move towards needle 3 by first driving part 11, to inject the medicine in cassette bottle 21 into human body by needle 3;When injection is needed, the needle cap 4 is abutted to the injection site of the human body, the needle cap 4 is retracted into the protective sleeve 2 under the action of external force, the needle 3 penetrates through the through hole 41 and penetrates into the skin of the human body to complete injection, the needle 3 is not exposed during the whole injection process, which reduces the fear of the injection person to a certain extent;When injection is completed, the needle cap 4 is automatically extended out of the protective sleeve 2 after being separated from the human body, and the needle 3 is stored in the storage cavity of the needle cap 4, so as to prevent the needle 3 from being touched by mistake due to exposure, and reduce the possibility of damage of the needle 3.

[0046] In some embodiments, as shown in Figure 3 and Figure 4 The electronic injection pen further includes a limiting member 22 and an elastic member 23. One end of the elastic member 23 is fixedly connected to the protective sleeve 2, and the other end is fixedly connected to the needle cap 4. The needle cap 4 protrudes a boss 42. The end of the protective sleeve 2 away from the main body 1 is provided with a limiting edge 25. The limiting member 22 is movably arranged in the protective sleeve 2.

[0047] As shown in Figure 3 , when the needle 3 is in the storage state, the limiting member 22 and the boss 42 abut, and the boss 42 is tightly abutted to the limiting edge 25. As shown in Figure 4 , when the needle 3 is in the injection state, the limiting member 22 is separated from the boss 42, and the needle cap 4 moves inward relative to the protective sleeve 2.

[0048] Specifically, as shown in Figure 3 , the inner wall of the protective sleeve 2 is fixedly provided with a spring stopper 24. One end of the elastic member 23 is fixed to the spring stopper 24, and the other end is fixed to the needle cap 4. The boss 42 protrudes from the outer side wall of the needle cap 4 and is close to one side of the cassette bottle 21. Optionally, the elastic member 23 is a spring.

[0049] As shown in Figure 3As shown, when the hidden needle 3 is in the storage state, the boss 42 is clamped between the limiting piece 22 and the limiting edge 25, so as to limit the hidden needle cap 4 by the limiting piece 22, prevent the hidden needle cap 4 from moving along the axial direction of the protective sleeve 2, and ensure that the hidden needle 3 is always stored in the storage cavity of the hidden needle cap 4.

[0050] As shown in the drawings, Figure 4 When injection is needed, the limiting piece 22 is controlled to move away from the boss 42, so that the limiting piece 22 and the boss 42 are separated, and the hidden needle cap 4 can be moved into the protective sleeve 2 under the action of external force. At this time, the hidden needle cap 4 extrudes the elastic piece 23, and the elastic piece 23 stores power. After injection is completed, the hidden needle cap 4 is pushed out of the protective sleeve 2 under the action of the elastic force of the elastic piece 23, so that the hidden needle 3 is accommodated in the storage cavity of the hidden needle cap 4, thereby realizing physical protection of the hidden needle 3 and avoiding exposure of the silver needle.

[0051] In some specific embodiments, as shown in the drawings, Figure 6 The electronic injection pen further comprises a second driving piece 26 and a gear 27. The second driving piece 26 is fixed to the inside of the protective sleeve 2. The limiting piece 22 is a rack. The axial direction of the rack is parallel to the radial direction of the protective sleeve 2. The gear 27 is sleeved on the driving shaft of the second driving piece 26, and the rack and the gear 27 are engaged.

[0052] Optionally, the second driving piece 26 is a servo motor or a stepping motor. The rack extends along the radial direction of the protective sleeve 2. The driving shaft of the second driving piece 26 drives the gear 27 to rotate, and the gear 27 and the rack are engaged, thereby driving the rack to move along the radial direction of the protective sleeve 2. When injection is needed, the driving shaft of the second driving piece 26 is controlled to rotate, so as to drive the rack to move away from the boss 42, so that the rack and the boss 42 are separated. When injection is completed, the driving shaft of the second driving piece 26 is controlled to rotate in the opposite direction, so as to drive the rack to move towards the boss 42 until the rack and the boss 42 abut, thereby limiting the hidden needle cap 4.

[0053] Further, in some embodiments, as shown in the drawings, Figure 6 The electronic injection pen further comprises a distance measuring sensor 5 and a temperature measuring sensor 6. The distance measuring sensor 5 and the temperature measuring sensor 6 are respectively fixed to one end of the protective sleeve 2 close to the hidden needle 3. The distance measuring sensor 5 and the temperature measuring sensor 6 are respectively electrically connected with the control board 12. The control board 12 is electrically connected with the second driving piece 26.

[0054] The distance measuring sensor 5 is configured to detect the distance between the hidden needle 3 and the skin of the user. The temperature measuring sensor 6 is configured to detect the body temperature of the user. When the detected distance of the distance measuring sensor 5 is within a preset range, and when the detected body temperature of the temperature measuring sensor 6 is within a preset temperature range, the control board 12 controls the second driving member 26 to drive the rack to move away from the boss 42, so that the rack and the boss 42 are separated, and the hidden needle cap 4 can be retracted into the protective sleeve 2 under the action of an external force. For example, when the detected distance of the distance measuring sensor 5 is less than or equal to 20 mm, and when the detected body temperature of the temperature measuring sensor 6 is greater than or equal to 35°C, the control board 12 controls the second driving member 26 to start. Otherwise, the second driving member 26 does not start, so as to prevent the hidden needle 3 from being touched by mistake.

[0055] When the detected distance of the distance measuring sensor 5 is out of the preset range, or when the detected body temperature of the temperature measuring sensor 6 is not within the preset temperature range, the control board 12 controls the second driving member 26 to rotate in the opposite direction, so that the rack moves towards the boss 42 until the rack and the boss 42 abut, thereby locking the hidden needle cap 4 to the protective sleeve 2, and ensuring that the hidden needle 3 is always accommodated in the accommodation cavity of the hidden needle cap 4.

[0056] Optionally, the distance measuring sensor 5 can be an ultrasonic distance measuring sensor 5. Optionally, the temperature measuring sensor 6 can be an infrared temperature measuring instrument.

[0057] As shown in Figure 7 The electronic injection pen further comprises a mounting cover 28. The mounting cover 28 covers the outer side wall of the protective sleeve 2. The second driving member 26 is located in the mounting cavity of the mounting cover 28. As shown in Figure 4 The outer side wall of the protective sleeve 2 is provided with a connecting hole 29 through which the rack passes. The rack is provided with a protrusion 221. When the hidden needle 3 is in the storage state, the rack protrudes out of the connecting hole 29 and abuts against the boss 42, and the protrusion 221 abuts against the outer side wall of the protective sleeve 2. When the hidden needle 3 is in the injection state, the rack is retracted into the connecting hole 29, and the end of the rack away from the boss 42 abuts against the top wall of the mounting cover 28.

[0058] Specifically, the mounting cover 28 comprises a first connecting plate, a protective cover 281 and a second connecting plate connected in sequence. The first connecting plate and the second connecting plate are respectively fixed to the outer side wall of the protective sleeve 2 and are arranged in the axial direction of the protective sleeve 2. The two ends of the protective cover 281 are detachably connected to the first connecting plate and the second connecting plate. Optionally, the first connecting plate and the second connecting plate can be locked to the outer side wall of the protective sleeve 2 by screws or other fixing members. Alternatively, the first connecting plate and the second connecting plate are integrated with the protective sleeve 2.

[0059] As shown in Figure 5As shown, the protective sleeve 2 is provided with a connecting hole 29. The connecting hole 29 respectively communicates with the interior of the protective sleeve 2 and the installation cavity of the installation cover 28. The second driving member 26 is installed in the installation cavity and is used to drive the rack to pass through the connecting hole 29 or to be retracted into the connecting hole 29. As shown Figure 3 As shown, when the hidden needle 3 is in the storage state, the second driving member 26 drives the rack to pass through the connecting hole 29, the end of the rack away from the protective cover 281 abuts against the boss 42, and the protrusion 221 abuts against the outer sidewall of the protective sleeve 2, so that the rack can be prevented from continuing to move towards the interior of the protective sleeve 2. When the protrusion 221 abuts against the outer sidewall of the protective sleeve 2, the second driving member 26 automatically stops running.

[0060] As shown Figure 4 As shown, when the hidden needle 3 is in the injection state, the second driving member 26 drives the rack to move towards the direction of the protective cover 281, the rack is retracted into the connecting hole 29, the end of the rack close to the protective cover 281 abuts against the protective cover 281, so that the rack can be prevented from continuing to move towards the exterior of the protective sleeve 2 by the protective cover 281. When the rack abuts against the protective cover 281, the second driving member 26 automatically stops running.

[0061] In other embodiments, the limiting member 22 can be a push rod. The outer sidewall of the protective sleeve 2 has a strip-shaped hole. The protective sleeve 2 comprises a sliding button. The sliding button passes through the strip-shaped hole and is fixedly connected with the push rod. When the hidden needle 3 is stored in the hidden needle cap 4, the push rod abuts against the boss 42. When injection is needed, the sliding button is manually pushed to separate the push rod from the boss 42, so as to release the hidden needle cap 4, and ensure that the hidden needle cap 4 can be retracted into the protective sleeve 2 under the action of external force and can be extended out of the protective sleeve 2 under the elastic action of the elastic member 23 after the injection is completed.

[0062] In some embodiments, as shown Figure 8 As shown, the electronic injection pen further comprises a fixing cylinder 7 and a hidden needle seat 31. The fixing cylinder 7 and the hidden needle seat 31 are respectively fixed in the protective sleeve 2. The fixing cylinder 7 is sleeved outside the cassette bottle 21. At least part of the fixing cylinder 7 is inserted into the main body 1. The fixing cylinder 7 has an outer thread, and the hidden needle seat 31 has an inner thread matched with the outer thread. The hidden needle seat 31 and the fixing cylinder 7 are threadedly connected, and the hidden needle 3 is inserted into the cassette bottle 21 through the hidden needle seat 31.

[0063] Specifically, the cassette bottle 21 is detachably fixed in the interior of the fixing cylinder 7 to form physical protection of the cassette bottle 21 by the fixing cylinder 7. One end of the fixing cylinder 7 is inserted into the main body 1, so that the driving shaft of the first driving member 11 can extend into the fixing cylinder 7 and abut against the piston of the cassette bottle 21.

[0064] The hidden needle 3 is fixedly arranged in the hidden needle seat 31 to provide support for the hidden needle 3 through the hidden needle seat 31. Optionally, the hidden needle 3 and the hidden needle seat 31 are integrated. By screwing the hidden needle seat 31 and the fixed cylinder 7, the hidden needle 3 can be stably inserted into the carton bottle 21, avoiding the deflection of the hidden needle 3, and at the same time, the user can conveniently replace the hidden needle 3. When replacing, the hidden needle seat 31 and the hidden needle 3 are taken out of the fixed cylinder 7, and then a new hidden needle 3 is inserted into the carton bottle 21, and then the new hidden needle seat 31 is screwed with the fixed cylinder 7.

[0065] Further, as shown in Figure 8 , the fixed cylinder 7 is provided with a plurality of notches at one end in the main body 1. The tongue 72 is formed between the adjacent two notches, and the tongue 72 is used to guide the carton bottle 21 to be slidably inserted into the corresponding position in the fixed cylinder 7.

[0066] As shown in Figure 8 , the fixed cylinder 7 is provided with a buckle 73 at the end away from the hidden needle 3. The end of the fixed cylinder 7 close to the hidden needle 3 is tapered, and the buckle 73 is used to tightly press the carton bottle 21 against the small-diameter end of the fixed cylinder 7. The end of the fixed cylinder 7 close to the hidden needle 3 is gradually narrowed, and this tapered design helps to ensure that the carton bottle 21 can be firmly installed at the small-diameter end of the fixed cylinder 7, and the buckle 73 can effectively fix and maintain the position of the carton bottle 21. Therefore, the user can easily insert the carton bottle 21 into the fixed cylinder 7, and tightly press the carton bottle 21 against the end of the fixed cylinder 7 close to the hidden needle 3 through the buckle 73.

[0067] In some embodiments, as shown in Figure 5 , the electronic injection pen further comprises a positioning cylinder 8. The positioning cylinder 8 is fixedly installed in the main body 1. The fixed cylinder 7, the positioning cylinder 8 and the driving shaft of the driving member are coaxially arranged. The end of the fixed cylinder 7 in the main body 1 is fixedly inserted into one end of the positioning cylinder 8, and the driving shaft of the first driving member 11 is slidably inserted into the other end of the positioning cylinder 8.

[0068] Specifically, the positioning cylinder 8 can be fixed to the inner wall of the main body 1 by screws or other fasteners. By slidingly inserting the driving shaft of the first driving member 11 into one end of the positioning cylinder 8 and fixedly inserting the other end of the fixed cylinder 7 into the other end of the positioning cylinder 8, the driving shaft of the first driving member 11 can be effectively ensured to move along the axial direction of the carton bottle 21, thereby ensuring the stability of the electronic injection pen during injection.

[0069] Further, in some embodiments, as shown in Figure 5 and Figure 9 , the main body 1 has a first inner threaded section 13. The first inner threaded section 13 is provided with a positioning protrusion 131. As shown in Figure 8As shown, the fixing cylinder 7 has a first outer threaded section 71 which is adapted to the first inner threaded section 13. The first outer threaded section 71 is provided with a positioning groove 711. The first outer threaded section 71 and the first inner threaded section 13 are threadedly connected. With the screwing of the first outer threaded section 71, the positioning protrusion 131 is inserted into the positioning groove 711.

[0070] In particular, as shown in Figure 5 The main body 1 comprises a top cover 18 and a bottom cover 19. The top cover 18 covers the bottom cover 19, thereby forming a cavity in the main body 1. The first driving member 11 is located in the cavity, and the driving shaft of the first driving member 11 is parallel to the axis of the fixing cylinder 7. Optionally, the first driving member 11 can be a syringe pump.

[0071] The top cover 18 and the bottom cover 19 are provided with a mounting hole at one end close to the fixing cylinder 7. The hole wall of the mounting hole is provided with the first inner threaded section 13. As shown in Figure 8 The outer wall of the fixing cylinder 7 has the first outer threaded section 71. The first inner threaded section 13 and the first outer threaded section 71 are adapted. The fixing cylinder 7 is located in the cavity at one end close to the main body 1, and the first outer threaded section 71 and the first inner threaded section 13 are threadedly connected, thereby realizing the fixed connection of the fixing cylinder 7 and the main body 1.

[0072] Further, the first inner threaded section 13 is provided with the positioning protrusion 131. Correspondingly, as shown in Figure 8 The first outer threaded section 71 is provided with the positioning groove 711. The positioning groove 711 is located at one end of the first outer threaded section 71 close to the main body 1. The positioning protrusion 131 is located at one end of the first inner threaded section 13 away from the fixing cylinder 7. With the screwing of the first outer threaded section 71, the positioning protrusion 131 is inserted into the positioning groove 711, thereby stably locking the fixing cylinder 7 on the main body 1.

[0073] When it is necessary to replace the cartridge 21, it is only needed to screw the fixing cylinder 7 in the opposite direction, to take the positioning protrusion 131 out of the positioning groove 711, and then unscrew the first outer threaded section 71, so as to separate the fixing cylinder 7 and the main body 1, without the aid of auxiliary tools, which is highly convenient.

[0074] In some embodiments, as shown in Figure 5 and Figure 9 The main body 1 is provided with a limiting table 14 at one end close to the protective sleeve 2. The limiting table 14 and the end face of the main body 1 form an abutting face 15. The limiting table 14 has a second outer threaded section 141 which is provided with a limiting groove 1411. As shown in Figure 7 The protective sleeve 2 has a second inner threaded section 20 which is adapted to the second outer threaded section 141, and the second inner threaded section 20 is provided with a limiting protrusion 201. The second outer threaded section 141 and the second inner threaded section 20 are threadedly connected. With the screwing of the second inner threaded section 20, the limiting protrusion 201 is inserted into the limiting groove 1411, and the end face of the protective sleeve 2 abuts against the abutting face 15.

[0075] It can be understood that the main body 1 is provided with a limiting table 14 near one end of the fixing cylinder 7. The protective sleeve 2 is arranged on the fixing cylinder 7. As shown in the figure, the second inner threaded section 20 is located at the open end of the protective sleeve 2. The second inner threaded section 20 and the second outer threaded section 141 are threadedly connected, and the limiting protrusion 201 is inserted into the limiting groove 1411; at the same time, the end face of the protective sleeve 2 and the abutting face 15 abut, so as to firmly fix the protective sleeve 2 on the main body 1. Figure 7

[0076] When it is necessary to replace the cartridge bottle 21, it is only necessary to pull out the limiting protrusion 201 from the limiting groove 1411, and then unscrew the second inner threaded section 20 from the second outer threaded section 141 in the opposite direction, so as to separate the protective sleeve 2 and the main body 1; then, the fixing cylinder 7 is screwed in the opposite direction, the positioning protrusion 131 is pulled out of the positioning groove 711, and then the first outer threaded section 71 is loosened, so as to separate the fixing cylinder 7 and the main body 1; then, the old cartridge bottle 21 is taken out of the fixing cylinder 7, and a new cartridge bottle 21 is inserted into the fixing cylinder 7, without the aid of auxiliary tools, which is very convenient.

[0077] Further, in some embodiments, as shown in the figure, the electronic injection pen further comprises a clamp 74. As shown in the figure, the end face of the limiting table 14 is provided with a connecting table 10. The connecting table 10 and the end face of the limiting table 14 form a limiting face. The clamp 74 is located in the protective sleeve 2, and the fixing cylinder 7 is arranged in the clamp 74. The clamp 74 is arranged on the connecting table 10, and the end face of the clamp 74 abuts against the limiting face. Figure 1 Figure 9 It can be understood that the clamp 74 is arranged on the connecting table 10, so as to ensure the stability of the connection between the main body 1 and the fixing cylinder 7. Specifically, the connecting table 10 is arranged on the limiting table 14. The fixing cylinder 7 is arranged in the clamp 74, and is stably locked on the main body 1 through the threaded connection of the first outer threaded section 71 and the first inner threaded section 13 and the limiting connection of the positioning protrusion 131 and the positioning groove 711.

[0078] Specifically, in some embodiments, as shown in the figure, the connecting table 10 has a third outer threaded section 101, and the third outer threaded section is provided with a locking groove 1011. The clamp 74 has a third inner threaded section matched with the third outer threaded section 101, and the third inner threaded section is provided with a locking block. The third outer threaded section 101 and the third inner threaded section are threadedly connected, and the locking block is inserted into the locking groove 1011 as the third inner threaded section is screwed in.

[0079] Specifically, in some embodiments, as shown in the figure, the connecting table 10 has a third outer threaded section 101, and the third outer threaded section is provided with a locking groove 1011. The clamp 74 has a third inner threaded section matched with the third outer threaded section 101, and the third inner threaded section is provided with a locking block. The third outer threaded section 101 and the third inner threaded section are threadedly connected, and the locking block is inserted into the locking groove 1011 as the third inner threaded section is screwed in. Figure 9

[0080] ​​​The third inner thread segment and the third outer thread segment 101 are threadedly connected by arranging the third outer thread segment 101 on the outer wall of the connecting table 10 and arranging a locking groove 1011 on the third outer thread segment 101, and the locking block is inserted into the locking groove 1011, so that the hoop 74 is further stably fixed on the connecting table 10.

[0081] In some embodiments, as shown in Figure 1 and Figure 2 The electronic injection pen also includes a protective cap 9. The protective cap 9 is detachably capped on the end of the protective sleeve 2 away from the main body 1. When the protective cap 9 is capped on the protective sleeve 2, the needle cover 4 is accommodated in the accommodating cavity of the protective cap 9, the through hole 41 of the protective sleeve 2 is isolated from the outside by the protective cap 9, and the bacteria in the outside is prevented from entering the through hole 41 to contaminate the needle 3, so that the needle 3 is protected from contamination.

[0082] Optionally, one of the protective sleeve 2 and the protective cap 9 is provided with a clamping groove, and the other is provided with a clamping head. When the protective cap 9 is capped on the end of the protective sleeve 2 away from the main body 1, the clamping head is clamped in the clamping groove, so that the detachable connection of the protective cap 9 and the protective sleeve 2 is realized.

[0083] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic injection pen, characterized by, The application relates to a safety injection device, which comprises a main body, a protective sleeve, a hidden needle and a hidden needle cap, the protective sleeve is fixed to the main body, a cassette bottle is fixedly arranged in the protective sleeve, the hidden needle is arranged in the cassette bottle, a first driving element is arranged in the main body, and the driving shaft of the first driving element is in abutment with a piston of the cassette bottle; the hidden needle cap is telescopically arranged at one end of the protective sleeve away from the main body, and the hidden needle cap has a through hole for the hidden needle to pass through; when the hidden needle is in an injection state, the hidden needle cap is retracted into the protective sleeve, and the hidden needle passes through the through hole; when the hidden needle is in a storage state, the hidden needle cap is extended out of the protective sleeve, and the hidden needle is stored in a storage cavity of the hidden needle cap. The application further comprises a limiting element and an elastic element, one end of the elastic element is fixedly connected with the protective sleeve, the other end is fixedly connected with the hidden needle cap, the hidden needle cap is provided with a convex table, one end of the protective sleeve away from the main body is provided with a limiting ridge, and the limiting element is movably arranged in the protective sleeve; when the hidden needle is in the storage state, the limiting element and the convex table are in abutment, and the convex table is tightly abutted against the limiting ridge; when the hidden needle is in the injection state, the limiting element is separated from the convex table, and the hidden needle cap moves inward relative to the protective sleeve. The application further comprises a second driving element and a gear, the second driving element is fixedly arranged in the interior of the protective sleeve, the limiting element is a gear rack, the axial direction of the gear rack is parallel to the radial direction of the protective sleeve, the gear is sleeved on the driving shaft of the second driving element, and the gear rack is in engagement with the gear.

2. The electronic injection pen of claim 1, wherein, The application further comprises a distance measuring sensor and a temperature measuring sensor, the distance measuring sensor and the temperature measuring sensor are respectively fixed to one end of the protective sleeve close to the hidden needle, the distance measuring sensor and the temperature measuring sensor are respectively electrically connected with a control board, and the control board is electrically connected with the second driving element. The application further comprises a mounting cover, the mounting cover is arranged on the outer side wall of the protective sleeve, the second driving element is located in a mounting cavity of the mounting cover, the outer side wall of the protective sleeve is provided with a connecting hole for the gear rack to pass through, and the gear rack is provided with a protrusion; when the hidden needle is in the storage state, the gear rack is extended out of the connecting hole and is in abutment with the convex table, and the protrusion is in abutment with the outer side wall of the protective sleeve; when the hidden needle is in the injection state, the gear rack is retracted into the connecting hole, and one end of the gear rack away from the convex table is in abutment with the top wall of the mounting cover.

3. The electronic injection pen of claim 2, wherein, The application further comprises a fixing cylinder and a hidden needle base, the fixing cylinder and the hidden needle base are respectively fixed in the protective sleeve, the fixing cylinder is sleeved on the outside of the cassette bottle, at least part of the fixing cylinder is inserted into the main body, the fixing cylinder is provided with external threads, the hidden needle base is provided with internal threads matched with the external threads, the hidden needle base and the fixing cylinder are in threaded connection, and the hidden needle is inserted into the cassette bottle through the hidden needle base.

4. The electronic injection pen of claim 3, wherein, ​ 5. The electronic injection pen of claim 3, wherein, ​ 6. The electronic injection pen of claim 1, wherein, ​ 7. The electronic injection pen of claim 6, wherein, The positioning cylinder is fixedly installed in the main body, the fixed cylinder, the positioning cylinder and the driving shaft of the driving member are coaxially arranged, one end of the fixed cylinder in the main body is fixedly inserted into one end of the positioning cylinder, and the driving shaft of the first driving member is slidably inserted into the other end of the positioning cylinder.

8. The electronic injection pen of claim 6, wherein, The main body has a first internally threaded section provided with a positioning protrusion, the fixed cylinder has a first externally threaded section matched with the first internally threaded section, the first externally threaded section is provided with a positioning groove, and the first externally threaded section and the first internally threaded section are threadedly connected, the positioning protrusion is inserted into the positioning groove with the first externally threaded section being screwed in.

9. The electronic injection pen of claim 1, wherein, The main body is provided with a limiting table at one end close to the protective sleeve, and an end surface of the main body and the limiting table form an abutting surface, The limiting table has a second externally threaded section provided with a limiting groove, the protective sleeve has a second internally threaded section matched with the second externally threaded section, the second internally threaded section is provided with a limiting protrusion, the second externally threaded section and the second internally threaded section are threadedly connected, the limiting protrusion is inserted into the limiting groove with the second internally threaded section being screwed in, and an end surface of the protective sleeve and the abutting surface are in abutment.

10. The electronic injection pen of claim 1, wherein, The protection cap is detachably covered on one end of the protective sleeve away from the main body, and the needle-concealing cap is accommodated in a containing cavity of the protection cap when the protection cap is covered on the protective sleeve.

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