Injection pen quick-mounting structure

Abstract

The utility model relates to the field of injection pens, in particular to a quick assembly structure of an injection pen. Comprising a pen shell and a pushing part. The push part comprises a push rod mechanism and a PCB, the PCB is fixed on the outer side of the push rod mechanism, and a pogo pin connector is vertically fixed on the PCB; the pen shell is sealed in the circumferential direction, the two ends of the pen shell are open, a channel allowing the pushing part to be installed in is formed, and an in-place baffle and a charging port are fixed to the inner wall of the pen shell. Any section, perpendicular to the length direction, of the inner wall of the pen shell from any opening end to the in-place baffle does not interfere with the pushing part; when one end of the pushing part abuts against the in-place baffle, the pogo pin connector is electrically connected with the charging port. By arranging the push rod square sleeve, the first mounting frame and the second mounting frame, the first PCB and the second PCB can be fixed with the push part outside the pen shell, so that the assembly difficulty in the integrally formed pen shell is simplified.

Description

Technical Field

[0001] The utility model relates to the field of injection pens, in particular to a quick-install structure of an injection pen. Background Art

[0002] The pen housing of the injection pen in the prior art often adopts a structure of two halves spliced ​​together. This structure has a poor sealing effect at the splicing point, and the splicing line is exposed on the pen housing, affecting the appearance of the product.

[0003] However, the circumferentially sealed and integrally molded pen case will bring great difficulties to the internal structure and electrical connections. Utility Model Content

[0004] The utility model aims to provide a quick-assembly structure for an injection pen, so as to solve the problem in the prior art that the internal parts of the injection pen are difficult to assemble in an integrally formed pen shell.

[0005] The technical solution of the utility model is: a quick-install structure of an injection pen, comprising a pen housing and a pushing part;

[0006] The pushing part includes a push rod mechanism and a PCB board, wherein the PCB board is fixed to the outside of the push rod mechanism and is vertically fixed with a pogo pin connector;

[0007] The pen housing is circumferentially sealed and open at both ends, forming a passage for the pusher to be installed. The inner wall of the pen housing is fixed with a stopper and a charging port. The inner wall of the pen housing does not interfere with the pusher in any cross-section perpendicular to the length direction between any open end and the stopper.

[0008] When one end of the pushing portion abuts against the in-place baffle, the pogo pin connector is electrically connected to the charging port.

[0009] Preferably, a first mounting bracket and a second mounting bracket are respectively provided at both ends of the push rod mechanism, and the first mounting bracket and the second mounting bracket are respectively abutted against the in-place baffle and the end of the pen shell away from the in-place baffle; the cross-section of the push rod mechanism perpendicular to the length direction is set to a rectangle, and the center positions of the first mounting bracket and the second mounting bracket are provided with a card slot corresponding to the shape of the push rod mechanism.

[0010] Preferably, the first mounting bracket and the second mounting bracket are respectively provided with a first mounting hole and a second mounting hole in the radial direction, and both ends of the PCB board are respectively connected to the first mounting hole and the second mounting hole through fasteners.

[0011] Preferably, the positioning baffle is axially penetrated with a through hole, and the first mounting bracket is coaxially provided with a connecting hole corresponding to the through hole; the outer edge surface of the second mounting bracket has a diameter corresponding to the inner wall of the pen housing.

[0012] Preferably, the PCB boards are arranged in plurality around the push rod mechanism, including a first PCB board arranged corresponding to the charging port and a second PCB board arranged corresponding to the battery. One side of the battery is fixed to the push rod mechanism, and the other side abuts against the second PCB board.

[0013] Preferably, the push rod mechanism includes a push rod, one end of which is connected to a drive motor, an outer thread of the push rod is fitted with a push rod sleeve, and an outer sleeve of the push rod sleeve is provided with a push rod square sleeve.

[0014] Compared with the prior art, the advantages of the present invention are: by providing a push rod square sleeve, a first mounting frame and a second mounting frame, the present application enables the first PCB board and the second PCB board to be fixed to the pushing part outside the pen case, thereby simplifying the assembly difficulty in the one-piece molded pen case. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a structural diagram of a quick-install structure of an injection pen described in the utility model;

[0017] Figure 2 This is a structural diagram of the push rod mechanism of the utility model;

[0018] Figure 3 This is a structural diagram of the pen case of the utility model;

[0019] Figure 4 This is a diagram of the connection structure of the push part of the utility model;

[0020] Figure 5 This is the structural diagram of the first mounting frame of the utility model;

[0021] Figure 6 This is the structural diagram of the second mounting frame of the utility model;

[0022] Among them: 1. pen case, 11. charging port, 12. in-position baffle, 13. through hole, 2. cartridge bottle, 21. rubber stopper, 3. pushing part, 31. push rod mechanism, 311. push rod, 312. push rod sleeve, 313. stepping motor, 314. push rod square sleeve, 32. first PCB board, 321. pogo pin connector, 33. second PCB board, 34. first mounting bracket, 341. first mounting hole, 342. connecting hole, 35. second mounting bracket, 351. second mounting hole. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0024] like Figure 1and Figure 2 As shown, a quick-release structure for an injection pen comprises a pen housing 1. A drug loading section is provided at the front end of the pen housing 1, which is used to engage a cartridge 2. The cartridge 2 has a needle attached to one end and an open end with a rubber plug 21 fitted at the other end. The opening allows the drug solution in the cartridge to be pushed out through the needle by pushing the rubber plug 21. A push section 3 is provided within the middle end of the pen housing 1. The push section 3 comprises a push rod mechanism 31, which includes a push rod 311 coaxially arranged with the pen housing 1, a push rod sleeve 312 mated to the push rod 311, and a stepper motor 313. One end of the push rod 311 is fixed to the actuator end of the stepper motor 313, and the outer wall of the push rod 311 is provided with an external thread. The inner wall of the push rod sleeve 312 is provided with an internal thread that threads together with the push rod 311. The end of the push rod sleeve 312, facing away from the stepper motor 313, abuts the rubber plug 21 in the cartridge 2. The stepper motor 313 drives the push rod 311 to rotate, causing the push rod sleeve 312 threadedly engaged with the push rod 311 to perform telescopic movement, thereby pushing the stopper 21 in the cartridge 2 toward the needle tip to push out the liquid medicine in the cartridge 2.

[0025] For waterproofing purposes, the pen case 1 of the present application is manufactured entirely in an integrated molding process. Compared to similar products that use a two-half spliced ​​structure, the pen case 1 of the present application is sealed along the circumference, with openings only at the two ends. This eliminates the need for sealing strips along the length, significantly reducing the sealing length, thereby improving the sealing effect and waterproofing performance. Furthermore, the outer wall of the pen case 1 has no obvious gaps, achieving an aesthetically pleasing effect.

[0026] However, the integrally formed pen case 1 will affect the installation of the pusher 3 and the connection of the corresponding electrical circuit. Therefore, the present application provides a quick-install structure.

[0027] like Figure 3 and Figure 4 As shown, the pen housing 1 is provided with a charging port 11 and a radially positioned stopper 12 on its inner wall. The push rod mechanism 31 also includes a push rod square sleeve 314 that fits over the push rod sleeve 312. The push rod square sleeve 314 has a rectangular cross-section perpendicular to its length. The push rod mechanism 31 is connected to a first mounting bracket 34 and a second mounting bracket 35 at each end. Correspondingly, the first and second mounting brackets 34, 35 have square slots shaped like the push rod square sleeve 314 at their centers. The first and second mounting brackets 34, 35 respectively abut the stopper 12 and the end of the pen housing 1 away from the stopper 12.

[0028] The push rod square sleeve 314 is provided with a PCB board on the plane thereof, including a first PCB board 32 and a second PCB board 33 provided on both sides of the first PCB board 32. Figure 5 and Figure 6As shown, the first mounting bracket 34 and the second mounting bracket 35 respectively have first mounting holes 341 and second mounting holes 351 radially defined therein. The first PCB 32 and the second PCB 33 are secured to the first mounting holes 341 and second mounting holes 351 via fasteners at both ends. The second PCB 33 is connected to a battery, one side of which is secured to the push rod sleeve 314 via adhesive, while the other side abuts the second PCB 33.

[0029] A Pogo pin connector 321 is vertically secured to the first PCB 32. The inner wall of the pen housing 1 does not interfere with the pusher 3 at any cross-section perpendicular to its length, from any open end to the stopper 12. This allows the pusher 3 to be assembled externally and then installed within the pen housing 1. When the pusher 3 is installed and the first mounting bracket 34 abuts the stopper 12, the Pogo pin connector 321 on the first PCB 32 is electrically connected to the charging port 11 on the pen housing 1.

[0030] like Figure 3 and Figure 5 As shown, the positioning stopper 12 has an axial through-hole 13. The first mounting bracket 34 has a connecting hole 342 coaxially disposed therewith, corresponding to the through-hole 13. The first mounting bracket 34 can be secured to the pen housing 1 via fasteners extending through the side of the positioning stopper 12 away from the first mounting bracket 34. The outer edge of the second mounting bracket 35 has a diameter slightly larger than the inner wall of the pen housing 1. When the pusher 3 is installed in the pen housing 1, the first mounting bracket 34 is secured to the positioning stopper 12, while the second mounting bracket 35 forms an interference fit with the pen housing 1.

[0031] 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. A quick-install structure for an injection pen, characterized in that: It comprises a pen housing (1) and a pushing portion (3); The pushing portion (3) comprises a push rod mechanism (31) and a PCB board, wherein the PCB board is fixed to the outside of the push rod mechanism (31) and is vertically fixed with a pogo pin connector (321); The pen housing (1) is circumferentially sealed and open at both ends, forming a passage for the push portion (3) to be installed. A stopper (12) and a charging port (11) are fixed to the inner wall of the pen housing (1); and the inner wall of the pen housing (1) does not interfere with the push portion (3) in any cross section perpendicular to the length direction between any open end and the stopper (12). When one end of the pushing portion (3) abuts against the in-place baffle (12), the pogo pin connector (321) is electrically connected to the charging port (11).

2. The quick-install structure of an injection pen according to claim 1, characterized in that: A first mounting bracket (34) and a second mounting bracket (35) are respectively provided at both ends of the push rod mechanism (31), and the first mounting bracket (34) and the second mounting bracket (35) are respectively in contact with the in-position baffle (12) and one end of the pen housing (1) away from the in-position baffle (12); the cross section of the push rod mechanism (31) perpendicular to the length direction is set to be rectangular, and the center positions of the first mounting bracket (34) and the second mounting bracket (35) are provided with a card slot corresponding to the shape of the push rod mechanism (31).

3. The quick-install structure of an injection pen according to claim 2, characterized in that: The first mounting frame (34) and the second mounting frame (35) are respectively provided with a first mounting hole (341) and a second mounting hole (351) along the radial direction, and both ends of the PCB board are respectively connected to the first mounting hole (341) and the second mounting hole (351) through fasteners.

4. The quick-install structure of an injection pen according to claim 3, characterized in that: The in-position baffle (12) is provided with a through hole (13) extending axially therethrough, and the first mounting frame (34) is provided with a connecting hole (342) coaxially corresponding to the through hole (13); the outer edge surface of the second mounting frame (35) has a diameter corresponding to the inner wall of the pen housing (1).

5. The quick-install structure of an injection pen according to claim 4, characterized in that: The PCB boards are arranged in plurality around the push rod mechanism (31), including a first PCB board (32) arranged corresponding to the charging port (11) and a second PCB board (33) arranged corresponding to the battery; one side of the battery is fixed to the push rod mechanism (31), and the other side abuts against the second PCB board (33).

6. The quick-install structure of an injection pen according to claim 1, characterized in that: The push rod mechanism (31) comprises a push rod (311), one end of the push rod (311) is connected to a driving motor, the outer side of the push rod (311) is threadedly engaged with a push rod sleeve (312), and the outer side of the push rod sleeve (312) is provided with a push rod square sleeve (314).

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