Injection pen with clamping type bottle anti-falling structure

Abstract

The utility model relates to the field of injection pens, in particular to an injection pen with a clamping type bottle anti-falling structure. Comprising a pen body, the front section of the pen body is provided with a medicine containing part, and the medicine containing part is used for installing a clamping type bottle; the middle section of the pen body is provided with a pushing part, the pushing part is provided with a pushing rod mechanism which can abut against the clamping type bottle, and the pushing rod mechanism is driven by a driver to move in the axial direction to push out medicine in the clamping type bottle; the charging part comprises a clamping sleeve, a plurality of buckles are evenly distributed on the clamping sleeve around the axis, and the buckles comprise the first buckle protruding towards the axis and the second buckle protruding away from the axis. The first buckle is connected with the clamping type bottle in an abutting mode. The first buckle is integrally formed on the inner wall of the clamping sleeve, and the first buckle is provided with the protruding end facing the axis direction, so that after the clamping bottle is arranged in the clamping sleeve, the first buckle can generate clamping force on the bottle body of the clamping bottle, and the clamping bottle is prevented from falling off when the clamping sleeve and the clamping base are installed.

Description

Technical Field

[0001] The utility model relates to the field of injection pens, in particular to an injection pen with a cartridge bottle anti-falling structure. Background Art

[0002] Pen-administered medication treatments can be categorized into diabetes treatment, growth hormone treatment, osteoporosis treatment, fertility, and other treatments.

[0003] In the prior art, the sleeve for installing the cartridge in the injection pen has a simple structure and lacks a structure for clamping the cartridge, which causes the cartridge to easily slip and break during installation and removal, posing a danger to the operator. Utility Model Content

[0004] The utility model aims to provide an injection pen with a cartridge bottle anti-falling structure, so as to solve the technical problem in the prior art that the injection pen is easy to fall off during the installation and removal of the cartridge bottle.

[0005] The technical solution of the utility model is: an injection pen with a cartridge anti-dropout structure, comprising a pen body, a front section of the pen body being configured as a medicine loading portion, the medicine loading portion being used to mount a cartridge; a middle section of the pen body being configured as a pusher portion, the pusher portion having a push rod mechanism capable of abutting against the cartridge, the push rod mechanism being driven by a driver to move axially to push out the medicine in the cartridge;

[0006] The medicine charging portion includes a ferrule, which has a plurality of buckles evenly distributed around the axis. The buckles include a first buckle protruding toward the axis and a second buckle protruding away from the axis. The first buckle abuts against the cartridge bottle.

[0007] Preferably, the ferrule is provided with a first through groove, the first through groove is set as a C-shaped structure, and the two sides of the C-shaped structure of the first through groove are parallel to the axis, the first buckle is formed by the part of the ferrule surrounded by the first through groove C-shaped structure, and the protruding end of the first buckle can swing around the connection end with the ferrule when subjected to axial force.

[0008] Preferably, the ferrule is further provided with a second through slot, which is connected to the first through slot and is also arranged as a C-shaped structure. The two sides of the C-shaped structure of the second through slot are in two planes perpendicular to the axis. The second buckle is formed by the part of the ferrule surrounded by the C-shaped structure of the second through slot. When the protruding end of the second buckle is subjected to a torque perpendicular to the radial direction, it can swing around the connection end with the ferrule.

[0009] Preferably, the inner wall of the front end of the ferrule is shaped like the cartridge bottle and has an opening for the needle to pass through; the tail end of the ferrule is open and corresponds to the push rod mechanism, and arc-shaped openings are provided on both sides along the radial direction to expose the tail end of the cartridge bottle.

[0010] Preferably, the charging portion is further provided with a holder, the inner wall and outer wall of the holder are respectively connected to the card sleeve and the pen body; the inner wall of the front end of the holder is provided with a card slot, and the second buckle is engaged with the card slot.

[0011] Preferably, the outer cover of the charging part is provided with a hidden needle mechanism, and the hidden needle mechanism includes a hidden needle shell and a hidden needle sleeve, one end of the hidden needle shell is connected to the card seat, and the hidden needle sleeve is slidably arranged at the end of the hidden needle shell away from the card seat.

[0012] Compared with the prior art, the advantages of the present invention are: a first buckle is integrally formed on the inner wall of the ferrule, and the first buckle has a protruding end facing the axial direction, so that after the cartridge bottle is installed in the ferrule, the first buckle can generate a clamping force on the bottle body of the cartridge bottle, preventing the cartridge bottle from falling off when the ferrule and the cartridge seat are installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a cross-sectional view of an injection pen with a cartridge bottle anti-falling structure according to the present invention;

[0015] Figure 2 This is a structural diagram of the ferrule from the first perspective of the present invention;

[0016] Figure 3 This is a structural diagram of the ferrule from the second perspective of the present invention;

[0017] Figure 4 This is a structural diagram of the card holder described in the utility model;

[0018] Among them: 1. Pen body, 2. Charging part, 21. Card sleeve, 211. First buckle, 212. Second buckle, 213. Arc-shaped opening, 214. First through slot, 215. Second through slot, 22. Card seat, 221. Card slot, 3. Pushing part, 31. Push rod, 32. Push rod sleeve, 4. Hidden needle mechanism, 41. Hidden needle shell, 42. Hidden needle sleeve. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0020] like Figure 1As shown, an injection pen with a cartridge-type anti-dropout structure comprises a pen body 1. A drug loading section 2 is provided at the front end of the pen body 1. The drug loading section 2 is used to engage a cartridge-type cartridge. The cartridge-type cartridge body is connected to a needle at one end and open at the other end. The opening is fitted with a rubber stopper, which can be pushed to eject the liquid drug from the cartridge through the needle. A pusher section 3 is provided within the middle end of the pen body 1. This pusher section 3 comprises a push rod mechanism comprising a push rod 31 coaxially arranged with the pen body 1, a push rod sleeve 32 mated to the push rod 31, and a stepper motor (not shown) fixed to the pen body 1. One end of the push rod 31 is fixed to the actuator end of the stepper motor, and its outer wall is provided with external threads. The inner wall of the push rod sleeve 32 is provided with internal threads that threadably engage with the push rod 31. The outer wall of the push rod sleeve 32 has a flat surface that mates with the pen body 1, and the end facing away from the stepper motor abuts the rubber stopper in the cartridge. The stepper motor drives the push rod 31 to rotate, causing the push rod sleeve 32 threadedly engaged with the push rod 31 to perform telescopic movement, thereby pushing the stopper in the cartridge toward the needle to push out the liquid medicine in the cartridge.

[0021] Combine Figure 2 - Figure 3 As shown, the charge section 2 comprises a ferrule 21 and a holder 22. The inner and outer walls of the holder 22 are connected to the ferrule 21 and the pen body 1, respectively. The ferrule 21 is hollow and is used to mount a cartridge. The ferrule 21 is uniformly formed with multiple latches around its axis, including a first latch 211 protruding toward the axis and a second latch 212 protruding away from the axis. When the cartridge is inserted into the ferrule 21, its outer wall is abutted and clamped by the first latch 211.

[0022] Specifically, the inner wall of the front end of the ferrule 21 is contoured to the cartridge and features an opening for a needle to penetrate. The rear end of the ferrule 21 is open and corresponds to the push rod mechanism. Arc-shaped openings 213 are provided on both radial sides, exposing the rear end of the cartridge, allowing the operator to grasp the rear end of the cartridge to install or remove it. Furthermore, the arc-shaped openings 213 allow the unopened rear end of the ferrule 21 to deform, allowing it to engage with the holder 22.

[0023] The ferrule 21 defines a first through-slot 214, which is a C-shaped structure with two sides parallel to the axis. The first buckle 211 is formed by the portion of the ferrule 21 surrounded by the C-shaped structure of the first through-slot 214. Because the two sides of the C-shaped structure of the first through-slot 214 are parallel to the axis, during installation of the cartridge, the end of the cartridge applies an axial force to the protruding end of the first buckle 211, allowing the first buckle 211 to swing radially around its connection with the ferrule 21, thereby achieving elasticity and applying a clamping force to the cartridge.

[0024] The ferrule 21 is further provided with a second through-slot 215, which is in communication with the first through-slot 214 and is also provided with a C-shaped structure. The two sides of the C-shaped structure of the second through-slot 215 are located in two planes perpendicular to the axis. The second buckle 212 is formed by the portion of the ferrule 21 surrounded by the C-shaped structure of the second through-slot 215. When the protruding end of the second buckle 212 is subjected to a torque perpendicular to the radial direction, it can swing around the connection end with the ferrule 21. The base 22 is provided with a slot 221. After the ferrule 21 is installed in the base 22, the ferrule 21 is rotated about the axis so that the second buckle 212 enters the slot 221 on the base 22, and the ferrule 21 enters the correct installation position.

[0025] like Figure 1 As shown, the drug loading unit 2 is provided with a hidden needle mechanism 4, which comprises a hidden needle housing 41 and a hidden needle cover 42. One end of the hidden needle housing 41 is connected to the cartridge 22; the hidden needle cover 42 is disposed at the end of the hidden needle housing 41 away from the cartridge 22 and slides relative to the hidden needle housing 41 during injection, thereby concealing the needle tip of the cartridge.

[0026] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An injection pen with a cartridge bottle anti-drop structure, characterized in that: The invention comprises a pen body (1), wherein the front section of the pen body (1) is provided as a medicine loading section (2), and the medicine loading section (2) is used to install a cartridge bottle; the middle section of the pen body (1) is provided as a pushing section (3), and the pushing section (3) has a push rod mechanism capable of abutting against the cartridge bottle, and the push rod mechanism moves axially under the drive of a driver to push out the medicine in the cartridge bottle; The medicine charging portion (2) comprises a ferrule (21), wherein the ferrule (21) has a plurality of buckles evenly distributed around an axis, wherein the buckles comprise a first buckle (211) protruding toward the axis and a second buckle (212) protruding away from the axis; the first buckle (211) abuts against the cartridge bottle.

2. The injection pen with a cartridge anti-drop structure according to claim 1, characterized in that: The ferrule (21) is provided with a first through slot (214), the first through slot (214) is configured as a C-shaped structure, and the two sides of the C-shaped structure of the first through slot (214) are parallel to the axis. The first buckle (211) is formed by the portion of the ferrule (21) surrounded by the C-shaped structure of the first through slot (214), and the protruding end of the first buckle (211) can swing around the connection end with the ferrule (21) when subjected to an axial force.

3. The injection pen with a cartridge anti-drop structure according to claim 2, characterized in that: The ferrule (21) is further provided with a second through groove (215), which is connected to the first through groove (214) and is also arranged as a C-shaped structure. The two sides of the C-shaped structure of the second through groove (215) are in two planes perpendicular to the axis. The second buckle (212) is formed by the portion of the ferrule (21) surrounded by the C-shaped structure of the second through groove (215). When the protruding end of the second buckle (212) is subjected to a torque perpendicular to the radial direction, it can swing around the connection end with the ferrule (21).

4. The injection pen with a cartridge anti-drop structure according to claim 1, characterized in that: The inner wall of the front end of the ferrule (21) is arranged in the shape of the cartridge bottle and has an opening for a needle to pass through; the tail end of the ferrule (21) is open and corresponds to the push rod mechanism, and arc-shaped openings (213) are provided on both sides along the radial direction to expose the tail end of the cartridge bottle.

5. The injection pen with a cartridge anti-drop structure according to claim 1, characterized in that: The charging portion (2) is further provided with a card seat (22), the inner wall and outer wall of the card seat (22) being connected to the card sleeve (21) and the pen body (1) respectively; the inner wall of the front end of the card seat (22) is provided with a card slot (221), and the second buckle (212) is engaged with the card slot (221).

6. The injection pen with a cartridge anti-drop structure according to claim 5, characterized in that: The charging portion (2) is provided with a hidden needle mechanism (4) on its outer cover. The hidden needle mechanism (4) comprises a hidden needle shell (41) and a hidden needle sleeve (42). One end of the hidden needle shell (41) is connected to the card seat (22), and the hidden needle sleeve (42) is slidably arranged on the end of the hidden needle shell (41) away from the card seat (22).

Images