Dropping liquid injection head for injection pen and use method of dropping liquid injection head

Abstract

The invention belongs to the technical field of medicine, and particularly relates to an injection head for dropping liquid and a using method thereof. The invention provides a drop-containing injection head for an injection pen, and the injection head comprises a medicine cabin which is provided with a spiral thread on the outer wall of one end; the injection head is matched with the medicine bin; the positioning sleeve sleeves the outer wall of the medicine bin and is positioned at the spiral thread; the limiting assembly is slidably arranged on the outer wall of the injection head in a sleeving manner; the sealing assembly is slidably arranged in the injection head and is suitable for opening and closing the infusion opening of the injection head; if the injection head is released when being screwed with the medicine bin, the limiting assembly cannot be inserted into the positioning sleeve, and the injection head cannot be continuously rotated and tightened; the injection head is spirally matched with the medicine bin, the limiting assembly is pushed by the positioning sleeve to move towards the injection head, and the limiting assembly pushes the linkage ring of the sealing assembly to synchronously move so as to open the infusion opening; through cooperation of the positioning sleeve, the limiting assembly and the sealing assembly, when the injection head and the medicine bin are spirally released, the limiting injection head continues to be rotated and tightened, and the situation that liquid medicine drips is avoided.

Description

Technical Field

[0001] The invention belongs to the field of medical technology, and specifically relates to a syringe, and in particular to a drip injection head and a use method thereof. Background Art

[0002] For chronic diseases, medical staff and patients who inject drugs at home often use injection pens to inject drugs to achieve the purpose of treating chronic diseases. Pen injection drug treatment can be divided into diabetes treatment, growth hormone treatment, osteoporosis treatment, fertility and other treatments.

[0003] In the related technology, the injection pen includes: a pen body, a scale cylinder, a pen cap, a medicine chamber and an injection head. After the medicine bottle is inserted into the medicine chamber, the scale cylinder is rotated to the specified scale, and the scale cylinder is pushed to move into the pen body. The scale cylinder is linked with the transmission mechanism in the pen body to push the rubber stopper in the medicine bottle to move horizontally to achieve the effect of quantitative injection.

[0004] However, since the injection head is a disposable item, it is fixed to the end of the medicine chamber in a spiral manner. Since the spiral pattern on the outer wall of the medicine chamber is relatively fine, if the processing precision is not high enough, the injection head and the medicine chamber spiral fit together, which is easy to be disengaged; and the disengagement of the injection head and the medicine chamber not only leads to insufficient stability of the injection head fixation, but also causes the liquid in the medicine bottle to drip when it is transported out.

[0005] Therefore, how to prevent the injection head from being disengaged from the medicine chamber when spiraling is a technical problem that urgently needs to be solved in this field.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0007] The embodiments of the present disclosure at least provide a dropper injection head for an injection pen and a method for using the same.

[0008] In a first aspect, an embodiment of the present disclosure provides a dropper injection head for an injection pen, comprising: Medicine warehouse; An injection head adapted to fit the medicine chamber; A positioning sleeve is fixed on the outer wall of the medicine bin at the spiral pattern; A limit assembly, the sliding sleeve of which is arranged on the outer wall of the injection head; A sealing assembly is slidably disposed inside the injection head and is suitable for opening and closing the infusion port of the injection head; If the injection head and the medicine chamber are screwed off, the limit assembly cannot be inserted into the positioning sleeve, and the injection head cannot be further rotated and tightened; The injection head is spirally adapted to the medicine chamber, the limiting component is pushed by the positioning sleeve to move toward the injection head, and the limiting component pushes the linkage ring of the sealing component to move synchronously to open the infusion port.

[0009] In an optional embodiment, two positioning strips are symmetrically arranged on the inner wall of the positioning sleeve along the axial direction, and the positioning strips are suitable for abutting against the outer wall of the injection head.

[0010] In an optional embodiment, the limiting assembly includes: a limiting ring, which is slidably sleeved on the outer wall of the injection head and is suitable for rotating relative to the injection head; Two limit strips, which are symmetrically arranged on the side of the limit ring located at the positioning sleeve and fit with the inner wall of the positioning sleeve; Among them, the injection head is spirally adapted to the medicine chamber, the limit bar is inserted into the positioning sleeve, the injection head continues to rotate, and the positioning sleeve pushes the limit ring to move relative to the injection head until the limit ring abuts against the linkage ring; if the injection head and the medicine chamber are disengaged during the spiral, the limit bar abuts against the inner wall of the positioning sleeve, so that the injection head continues to be spirally inserted into the positioning sleeve.

[0011] In an optional embodiment, the limit bar and the positioning bar are parallel to each other. When the limit bar abuts the positioning bar, the injection head continues to spirally rotate, and the limit ring moves toward the sealing component relative to the injection head to push the linkage ring to open the infusion port.

[0012] In an optional embodiment, the sealing assembly includes: a sealing ring, which is sleeved on the outer wall of the injection head; A linkage ring, which is slidably sleeved on the outer wall of the injection head and protrudes from the side wall of the sealing ring; A sealing plate, which is arranged on the inner wall of the injection head; An adjustment plate, which is slidably arranged on the inner wall of the injection head, and the infusion port passes through the adjustment plate; When the linkage ring is pushed by the limiting ring to move horizontally, the linkage ring pushes the adjustment plate to move horizontally synchronously to open the infusion port.

[0013] In an optional embodiment, a first through hole is formed on the sealing plate, and the first through hole is staggered with the infusion port; When the regulating plate abuts against the sealing plate, the first through hole and the infusion port are both sealed; When the regulating plate moves relative to the sealing plate, the first through hole is communicated with the infusion port.

[0014] In an optional embodiment, the side wall of the sealing plate is provided with a first connecting tube which is connected to the first through hole, and the first connecting tube is suitable for being inserted into a medicine bottle.

[0015] In an optional embodiment, the invention comprises: a pen body tube, the interior of which is hollow; A graduated rotating cylinder, which is rotatably disposed in the pen body tube; A medicine chamber is provided at one end of the pen body tube and is suitable for placing a medicine bottle; A pen cap, which is mounted outside the medicine chamber; A transmission mechanism is arranged in the pen body tube; An injection head adapted to fit the medicine chamber; A positioning sleeve is fixed on the outer wall of the medicine bin at the spiral pattern; A limit assembly, the sliding sleeve of which is arranged on the outer wall of the injection head; A sealing assembly is slidably disposed inside the injection head, the sealing assembly comprising a linkage ring and an adjustment plate, the linkage ring is slidably sleeved on the outer wall of the injection head, and the adjustment plate is slidably disposed on the inner wall of the injection head; If the injection head and the medicine chamber are screwed off, the limit assembly cannot be inserted into the positioning sleeve, and the infusion port cannot be opened; The injection head is spirally adapted to the medicine chamber, the limiting component is pushed by the positioning sleeve to move toward the injection head, and the limiting component pushes the linkage ring of the sealing component to move synchronously to open the infusion port; After the graduated rotating drum rotates outward to a predetermined scale, the graduated rotating drum moves inward in the opposite direction to allow the liquid medicine in the medicine bottle to be quantitatively infused.

[0016] In an optional embodiment, the inner wall of the positioning sleeve is symmetrically provided with two positioning strips along the axial direction, and the positioning strips are suitable for abutting against the outer wall of the injection head; The limiting assembly comprises: a limiting ring, which is slidably sleeved on the outer wall of the injection head and is suitable for rotating relative to the injection head; Two limit strips, which are symmetrically arranged on the side of the limit ring located at the positioning sleeve and fit with the inner wall of the positioning sleeve; Among them, the injection head is spirally adapted to the medicine chamber, the limit bar is inserted into the positioning sleeve, the injection head continues to rotate, and the positioning sleeve pushes the limit ring to move relative to the injection head until the limit ring abuts against the linkage ring; if the injection head and the medicine chamber are disengaged during the spiral, the limit bar abuts against the inner wall of the positioning sleeve, so that the injection head continues to be spirally inserted into the positioning sleeve.

[0017] In an optional embodiment, the sealing assembly includes: a sealing ring, which is sleeved on the outer wall of the injection head; The linkage ring is suitable for moving relative to the sealing ring; A sealing plate, which is arranged on the inner wall of the injection head, and the infusion port passes through the sealing plate; The adjusting plate and the sealing plate are parallel to each other; When the linkage ring is pushed by the limiting ring to move horizontally, the linkage ring pushes the adjustment plate to move horizontally synchronously to open the infusion port.

[0018] In an optional embodiment, a first through hole is provided on the adjustment plate, and the first through hole is staggered with the infusion port; When the regulating plate abuts against the sealing plate, the first through hole and the infusion port are both sealed; When the regulating plate moves relative to the sealing plate, the first through hole is communicated with the infusion port.

[0019] In a second aspect, the present disclosure also provides a method for using an injection pen, the method comprising: After the medicine bottle is placed in the medicine chamber, the injection head is adapted to the medicine chamber spiral; If the injection head and the medicine chamber are screwed off, the limit assembly cannot be inserted into the positioning sleeve, and the infusion port cannot be opened; The injection head is spirally adapted to the medicine chamber, the limiting component is pushed by the positioning sleeve to move toward the injection head, and the limiting component pushes the linkage ring of the sealing component to move synchronously to open the infusion port.

[0020] The beneficial effect of the present invention is that the present invention provides a drip injection head for an injection pen and a method of using the same, and through the cooperation of a positioning sleeve, a limiting assembly and a sealing assembly, when the injection head and the medicine chamber are spirally fixed, if the injection head and the medicine chamber are spirally disengaged, the limiting assembly limits the injection head to continue rotating and tightening, thereby avoiding the unstable fixation of the injection head and the medicine chamber caused by disengagement.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of an expanded state of a dripping injection head for an injection pen provided by an embodiment of the present disclosure; Figure 2 A front view of an injection head provided in an embodiment of the present disclosure; Figure 3A sectional front view of an injection head provided in an embodiment of the present disclosure Figure 4 A schematic diagram of the abutment state of the sealing plate and the adjustment plate provided in the embodiment of the present disclosure; Figure 5 A schematic diagram of a state where a sealing plate and an adjustment plate are separated according to an embodiment of the present disclosure; Figure 6 A perspective view of an injection pen provided according to an embodiment of the present disclosure.

[0025] In the figure: 1. Medicine warehouse; 2. Injection head; 20. Infusion port; 3. Positioning sleeve; 30. Positioning strip; 4. Limiting assembly; 41. Limiting ring; 42. Limiting strip; 5. Sealing assembly; 51. Sealing ring; 52. Linkage ring; 53. Sealing plate; 54. Adjusting plate; 55. First through hole; 56. First connecting pipe; 57. Circular ring groove; 6. Pen body; 7. Scale cylinder; 8. Pen cap. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component may be directly formed on the second component, or the third component may be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components may be exaggerated or reduced.

[0028] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0029] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0030] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0031] After research, it was found that the shortcomings of the existing technology are: in the relevant technology, the injection pen includes: a pen body tube, a scale cylinder, a pen cap, a medicine chamber and an injection head. After the medicine bottle is inserted into the medicine chamber, the scale cylinder is rotated to the specified scale, and the scale cylinder is pushed to move into the pen body tube. The scale cylinder is linked with the transmission mechanism in the pen body tube to push the rubber stopper in the medicine bottle to move horizontally to achieve the effect of quantitative injection.

[0032] However, since the injection head is a disposable item, it is fixed to the end of the medicine chamber in a spiral manner. Since the spiral pattern on the outer wall of the medicine chamber is relatively fine, if the processing precision is not high enough, the injection head and the medicine chamber spiral fit together, which is easy to be disengaged; and the disengagement of the injection head and the medicine chamber not only leads to insufficient stability of the injection head fixation, but also causes the liquid in the medicine bottle to drip when it is transported out.

[0033] Therefore, how to prevent the injection head from being disengaged from the medicine chamber when spiraling is a technical problem that urgently needs to be solved in this field.

[0034] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] like Figures 1 to 6 As shown, some embodiments provide a dropper injection head for an injection pen, comprising: a medicine chamber 1, one end of which has an outer wall provided with a spiral pattern; the medicine chamber 1 is hollow inside, and a medicine bottle is suitable for being inserted into the medicine chamber 1; an injection head 2, which is adapted to the medicine chamber 1; after the injection head 2 is spirally adapted to the medicine chamber 1, a first connecting tube 56 is inserted into the medicine bottle, and the rubber plug in the medicine bottle moves horizontally to push the liquid medicine in the medicine bottle to flow toward the first connecting tube 56. A positioning sleeve 3 is fixed on the outer wall of the medicine chamber 1 at the spiral pattern; and a gap is provided between the inner wall of the positioning sleeve 3 and the outer wall of the medicine chamber 1, and the injection head 2 is suitable for being inserted into the gap. The limit assembly 4, whose sliding sleeve is arranged on the outer wall of the injection head 2; the sealing assembly 5, which is slidably arranged inside the injection head 2 and is suitable for opening and closing the infusion port 20 of the injection head 2; wherein, if the injection head 2 and the medicine chamber 1 are screwed off, the limit assembly 4 cannot be inserted into the positioning sleeve 3, and the injection head 2 cannot continue to rotate and tighten; the injection head 2 is screwed with the medicine chamber 1, and the limit assembly 4 is pushed by the positioning sleeve 3 to move toward the injection head 2, and the limit assembly 4 pushes the linkage ring 52 of the sealing assembly 5 to move synchronously to open the infusion port 20. Through the cooperation of the positioning sleeve 3, the limit assembly 4 and the sealing assembly 5, when the injection head 2 and the medicine chamber 1 are screwed off, the limit assembly 4 limits the injection head 2 to continue to rotate and tighten, thereby avoiding the unstable fixation of the injection head 2 and the medicine chamber 1 due to the screwing off, and the dripping of the liquid medicine output from the medicine chamber 1 during injection.

[0038] Reference Figure 1 The inner wall of the positioning sleeve 3 is symmetrically provided with two positioning strips 30 along the axial direction, and the positioning strips 30 are suitable for abutting against the outer wall of the injection head 2. There is a gap between the positioning strips 30 and the thread pattern of the outer wall of the medicine chamber 1. When the injection head 2 and the medicine chamber 1 are threadedly adapted, the outer wall of the injection head 2 fits against the inner bottom wall of the positioning strips 30.

[0039] Reference Figure 2The limiting assembly 4 includes: a limiting ring 41, which is slidably sleeved on the outer wall of the injection head 2 and is suitable for rotating relative to the injection head 2; two limiting strips 42, which are symmetrically arranged on the limiting ring 41 on the side of the positioning sleeve 3 and fit with the inner wall of the positioning sleeve 3; one limiting strip 42 corresponds to one positioning strip 30; wherein the injection head 2 is spirally adapted to the medicine chamber 1, and the limiting strip 42 is inserted into the positioning sleeve 3 until the limiting strip 42 abuts against the positioning strip 30; the injection head 2 continues to rotate, and as the injection head 2 is gradually inserted into the positioning sleeve 3, the positioning sleeve 3 pushes the limiting ring 41 to move relative to the injection head 2 until the limiting ring 41 abuts against the linkage ring 52; the limiting ring 41 is suitable for pushing the linkage ring 52 to move it away from the medicine chamber 1; the linkage ring 52 pushes the adjustment plate 54 to move synchronously so that the first through hole 55 is connected with the infusion port 20. If the injection head 2 and the medicine chamber 1 are disengaged during the spiral process, the limiting strip 42 is tilted relative to the axis of the medicine chamber 1, and the limiting strip 42 abuts against the inner wall of the positioning sleeve 3 to limit the injection head 2 from continuing to be spirally inserted into the positioning sleeve 3. This avoids the situation where the injection head 2 and the medicine chamber 1 are unstable due to the disengagement, and the liquid medicine output from the medicine chamber 1 drips during injection.

[0040] Continue to refer to the attached Figure 1 The limit strip 42 and the positioning strip 30 are parallel to each other. When the limit strip 42 abuts against the positioning strip 30, the injection head 2 continues to spirally rotate, and the limit ring 41 moves toward the sealing component 5 relative to the injection head 2 to push the linkage ring 52 to open the infusion port 20.

[0041] Reference Figure 3 The sealing assembly 5 comprises: a sealing ring 51, which is sleeved on the outer wall of the injection head 2; a circular groove 57 is provided on the side of the sealing ring 51 close to the medicine chamber 1, and the linkage ring 52 is slidably arranged in the circular groove 57; the linkage ring 52 is slidably sleeved on the outer wall of the injection head 2 and protrudes from the side wall of the sealing ring 51; a return spring is arranged on the inner bottom wall of the circular groove 57, one end of the return spring is fixed on the side wall of the linkage ring 52, and the return spring is suitable for pushing the linkage ring 52 to move away from the sealing ring 51, so that the sealing plate 53 and the adjustment plate 54 maintain abutment state. The sealing plate 53 is arranged on the inner wall of the injection head 2, and the sealing plate 53 is arranged between the adjustment plate 54 and the medicine chamber 1. The adjustment plate 54 is slidably arranged on the inner wall of the injection head 2, and a plurality of connecting rods are arranged on the side wall of the linkage ring 52 along the axial direction, and the connecting rods penetrate the sealing plate 53, and the connecting rods are movably fixed on the adjustment plate 54. When the linkage ring 52 is pushed to move away from the medicine chamber 1, the linkage ring 52 pushes the adjustment plate 54 to move synchronously, and the infusion port 20 passes through the adjustment plate 54; wherein, when the linkage ring 52 is pushed to move horizontally by the limiting ring 41, the linkage ring 52 pushes the adjustment plate 54 to move horizontally synchronously to open the infusion port 20.

[0042] Reference Figure 4 The sealing plate 53 is provided with a first through hole 55, and the first through hole 55 is staggered with the infusion port 20; the first through hole 55 has the same inner diameter as the infusion port 20; wherein, when the adjusting plate 54 abuts against the sealing plate 53, the first through hole 55 and the infusion port 20 are both sealed; when the adjusting plate 54 moves relative to the sealing plate 53, the first through hole 55 is connected with the infusion port 20.

[0043] Reference Figure 2 The side wall of the sealing plate 53 is provided with a first connecting tube 56 which is connected with the first through hole 55 , and the first connecting tube 56 is suitable for being inserted into the medicine bottle.

[0044] Reference Figure 1 and Figure 6 Some embodiments provide an injection pen, characterized in that a pen body tube 6 is hollow inside; a scale rotating cylinder 7 is rotatably arranged in the pen body tube 6; a medicine chamber 1 is arranged at one end of the pen body tube 6 and is suitable for placing a medicine bottle; a pen cap 8 is sleeved outside the medicine chamber 1; an injection head 2 is adapted to the medicine chamber 1; a positioning sleeve 3 is sleeved on the outer wall of the medicine chamber 1 at the spiral pattern; a limiting component 4 is slidably sleeved on the outer wall of the injection head 2; a sealing component 5 is slidably arranged inside the injection head 2, and the sealing component 5 includes a linkage ring 52 and an adjusting plate 54, the linkage ring 52 is slidably sleeved on the outer wall of the injection head 2, and the adjusting plate 54 is slidably arranged on the inner wall of the injection head 2; wherein, If the injection head 2 and the medicine chamber 1 are disengaged during the screwing, the limit assembly 4 cannot be inserted into the positioning sleeve 3, and the infusion port 20 cannot be opened; the injection head 2 and the medicine chamber 1 are screwed together, and the limit assembly 4 is pushed by the positioning sleeve 3 to move toward the injection head 2, and the limit assembly 4 pushes the linkage ring 52 of the sealing assembly 5 to move synchronously to open the infusion port 20; after the scale drum 7 rotates outward to a predetermined scale, the scale drum 7 moves inward in the opposite direction to ensure quantitative infusion of the liquid medicine in the medicine bottle.

[0045] Some embodiments provide a method for using an injection pen, the method comprising: after placing a medicine bottle into a medicine chamber 1, screwing the injection head 2 into the medicine chamber 1; if the injection head 2 is disengaged from the medicine chamber 1 during screwing, the limit assembly 4 cannot be inserted into the positioning sleeve 3, and the infusion port 20 cannot be opened; the injection head 2 is screwed into the medicine chamber 1, the limit assembly 4 is pushed by the positioning sleeve 3 to move toward the injection head 2, and the limit assembly 4 pushes the linkage ring 52 of the sealing assembly 5 to move synchronously to open the infusion port 20.

[0046] To summarize, when the injection head 2 and the medicine chamber 1 are screwed together, if the injection head 2 and the medicine chamber 1 are disengaged during the screwing, the limit strip 42 is inclined relative to the axial direction of the positioning sleeve 3 after being inserted into the positioning sleeve 3, and the outer wall of the limit strip 42 abuts against the inner wall of the positioning sleeve 3. The limit assembly 4 cannot be inserted into the positioning sleeve 3, and the injection head 2 cannot continue to be rotated and tightened; if the injection head 2 and the medicine chamber 1 are screwed together, the limit assembly 4 is pushed by the positioning sleeve 3 to move toward the injection head 2, and the limit assembly 4 pushes the linkage ring 52 of the sealing assembly 5 to move synchronously to open the infusion port 20.

[0047] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0049] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A dripping injection head for an injection pen, characterized in that: include: A medicine chamber (1) and an injection head (2), and A positioning sleeve (3) which is fixed on the outer wall of the medicine bin (1); A limit assembly (4), the sliding sleeve of which is arranged on the outer wall of the injection head (2); A sealing assembly (5) which is slidably disposed inside the injection head (2) and is suitable for opening and closing the infusion port (20) of the injection head (2); If the injection head (2) and the medicine chamber (1) are screwed together, the limiting component (4) blocks the injection head (2) from being inserted into the positioning sleeve (3); The injection head (2) is screw-fitted with the medicine chamber (1), the limiting component (4) is pushed by the positioning sleeve (3) to move in the direction of the injection head (2), and the limiting component (4) pushes the linkage ring (52) of the sealing component (5) to move synchronously, so as to open the infusion port (20).

2. The dripping liquid injection head for an injection pen according to claim 1, characterized in that: Two positioning strips (30) are symmetrically arranged on the inner wall of the positioning sleeve (3) along the axial direction, and the positioning strips (30) are suitable for abutting against the outer wall of the injection head (2).

3. The dripping liquid injection head for an injection pen according to claim 2, characterized in that: The limiting assembly (4) comprises: a limiting ring (41) which is slidably sleeved on the outer wall of the injection head (2) and is suitable for rotating relative to the injection head (2); Two limiting strips (42), the two limiting strips (42) are symmetrically arranged on the limiting ring (41) and located on the side of the positioning sleeve (3), and are in contact with the inner wall of the positioning sleeve (3); The injection head (2) is screw-fitted with the medicine chamber (1), the limiting strip (42) is inserted into the positioning sleeve (3), the injection head (2) continues to rotate, and the positioning sleeve (3) pushes the limiting ring (41) to move relative to the injection head (2) until the limiting ring (41) abuts against the linkage ring (52); If the injection head (2) and the medicine chamber (1) are disengaged during the spiral process, the limiting strip (42) abuts against the inner wall of the positioning sleeve (3), so that the injection head (2) continues to be spirally inserted into the positioning sleeve (3).

4. The dripping liquid injection head for an injection pen according to claim 3, characterized in that: The limiting strip (42) and the positioning strip (30) are parallel to each other. When the limiting strip (42) abuts against the positioning strip (30), the injection head (2) continues to rotate in a spiral direction, and the limiting ring (41) moves relative to the injection head (2) toward the sealing component (5) to push the linkage ring (52) to open the infusion port (20).

5. The dripping liquid injection head for an injection pen according to claim 3, characterized in that: The sealing assembly (5) comprises: a sealing ring (51) which is sleeved on the outer wall of the injection head (2); A linkage ring (52) which is slidably sleeved on the outer wall of the injection head (2) and protrudes from the side wall of the sealing ring (51); A sealing plate (53) disposed on the inner wall of the injection head (2); An adjustment plate (54) which is slidably disposed on the inner wall of the injection head (2), and the infusion port (20) passes through the adjustment plate (54); When the linkage ring (52) is pushed by the limiting ring (41) to move horizontally, the linkage ring (52) pushes the adjustment plate (54) to move horizontally synchronously, so as to open the infusion port (20).

6. The dripping liquid injection head for an injection pen according to claim 5, characterized in that: The sealing plate (53) is provided with a first through hole (55), and the first through hole (55) is arranged offset from the infusion port (20); When the regulating plate (54) and the sealing plate (53) are in contact, the first through hole (55) and the infusion port (20) are both sealed; When the regulating plate (54) moves relative to the sealing plate (53), the first through hole (55) is communicated with the infusion port (20).

7. The dripping liquid injection head for an injection pen according to claim 6, characterized in that: The side wall of the sealing plate (53) is provided with a first connecting tube (56) which is in communication with the first through hole (55), and the first connecting tube (56) is suitable for being inserted into a medicine bottle.

8. An injection pen, characterized in that: include: A pen body tube (6) having a hollow interior; A graduated rotating cylinder (7) rotatably disposed in the pen body tube (6); A medicine chamber (1) is arranged at one end of the pen body tube (6) and is suitable for placing a medicine bottle; A pen cap (8) which is sleeved on the outside of the medicine chamber (1); An injection head (2) adapted to fit the medicine chamber (1); A positioning sleeve (3) is fixed on the outer wall of the medicine bin (1) at the spiral pattern; A limit assembly (4), the sliding sleeve of which is arranged on the outer wall of the injection head (2); A sealing assembly (5) is slidably disposed inside the injection head (2), the sealing assembly (5) comprising a linkage ring (52) and an adjustment plate (54), the linkage ring (52) being slidably sleeved on the outer wall of the injection head (2), and the adjustment plate (54) being slidably disposed on the inner wall of the injection head (2); If the injection head (2) and the medicine chamber (1) are screwed together, the limiting component (4) blocks the injection head (2) from being inserted into the positioning sleeve (3); The injection head (2) is screw-fitted with the medicine chamber (1), the limiting component (4) is pushed by the positioning sleeve (3) to move in the direction of the injection head (2), and the limiting component (4) pushes the linkage ring (52) of the sealing component (5) to move synchronously, so as to open the infusion port (20); After the graduated rotating drum (7) rotates outward to a predetermined scale, the graduated rotating drum (7) moves inward in the opposite direction, so that the liquid medicine in the medicine bottle is quantitatively infused.

9. The injection pen according to claim 8, characterized in that: The inner wall of the positioning sleeve (3) is symmetrically provided with two positioning strips (30) along the axial direction, and the positioning strips (30) are suitable for abutting against the outer wall of the injection head (2); The limiting assembly (4) comprises: a limiting ring (41) which is slidably sleeved on the outer wall of the injection head (2) and is suitable for rotating relative to the injection head (2); Two limiting strips (42), the two limiting strips (42) are symmetrically arranged on the limiting ring (41) and located on the side of the positioning sleeve (3), and are in contact with the inner wall of the positioning sleeve (3); The injection head (2) and the medicine bin (1) are screw-fitted, the limiting strip (42) is inserted into the positioning sleeve (3), the injection head (2) continues to rotate, and the positioning sleeve (3) pushes the limiting ring (41) to move relative to the injection head (2) until the limiting ring (41) abuts against the linkage ring (52); if the injection head (2) and the medicine bin (1) are screw-disconnected, the limiting strip (42) abuts against the inner wall of the positioning sleeve (3), so that the limiting injection head (2) continues to be screw-inserted into the positioning sleeve (3).

10. The injection pen according to claim 9, characterized in that: The sealing assembly (5) comprises: a sealing ring (51) which is sleeved on the outer wall of the injection head (2); The linkage ring (52) is suitable for moving relative to the sealing ring (51); A sealing plate (53) disposed on the inner wall of the injection head (2), and the infusion port (20) passes through the sealing plate (53); The adjustment plate (54) and the sealing plate (53) are parallel to each other; When the linkage ring (52) is pushed by the limiting ring (41) to move horizontally, the linkage ring (52) pushes the adjustment plate (54) to move horizontally synchronously, so as to open the infusion port (20).

11. The injection pen according to claim 10, characterized in that: The regulating plate (54) is provided with a first through hole (55), and the first through hole (55) is arranged offset from the infusion port (20); When the regulating plate (54) and the sealing plate (53) are in contact, the first through hole (55) and the infusion port (20) are both sealed; When the regulating plate (54) moves relative to the sealing plate (53), the first through hole (55) is communicated with the infusion port (20).

12. A method for using an injection pen, characterized in that: Using the dripping liquid injection head for an injection pen according to any one of claims 1 to 7, the method of using comprises: After the medicine bottle is placed in the medicine chamber (1), the injection head (2) is screwed into the medicine chamber (1); If the injection head (2) and the medicine chamber (1) are screwed off, the limiting component (4) cannot be inserted into the positioning sleeve (3), and the infusion port (20) cannot be opened; The injection head (2) is screw-fitted with the medicine chamber (1), the limiting component (4) is pushed by the positioning sleeve (3) to move in the direction of the injection head (2), and the limiting component (4) pushes the linkage ring (52) of the sealing component (5) to move synchronously, so as to open the infusion port (20).

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