WO2013185379A1

WO2013185379A1 - Adjustable injection pen

Info

Publication number: WO2013185379A1
Application number: PCT/CN2012/077655
Authority: WO
Inventors: 张有平
Original assignee: 甘肃成纪生物药业有限公司
Priority date: 2012-06-14
Filing date: 2012-06-27
Publication date: 2013-12-19
Also published as: CN202699777U; IN2015DN00269A

Abstract

An adjustable injection pen comprises a middle protection sleeve (5) and a medication core installation cylinder (9). A medication core (14) is arranged in an inner cavity of the medication core installation cylinder (9), and an installation cylinder outer sleeve (7) is arranged on an outer surface of the medication core installation cylinder (9). An outer protection sleeve (3) is arranged on an outer surface of the middle protection sleeve (5), and a dose display sleeve (10) is arranged between a bottom end of the middle protection sleeve (5) and the outer protection sleeve (3). A bottom end of the dose display sleeve (10) is connected with a knob (2), and a button (1) is arranged in a through hole of the knob (2). An inner protection sleeve (4) is sheathed in the middle protection sleeve (5), and a rack (6) is sheathed in the inner protection sleeve (4). A top end of the rack (6) contacts with a rubber plug (15) of the medication core (14), double gears (13) are arranged in rack teeth on an inner surface of the rack (6) and contact with a gear seat at a top end of a lock rod (11), and the other end of the lock rod (11) is connected with an inner end of the button (1). A friction block (12) is arranged between the rack (6) and the middle protection sleeve (5). By means of the adjustable injection pen, the injection dose is accurate, and both the usage and the carrying are convenient.

Description

Adjustable injection pen

Technical field

The utility model belongs to the technical field of medical injection instruments, and relates to an adjustable injection pen.

Background technique

The existing injection techniques are basically divided into two types: one is an injection needle that is routinely used by medical personnel, and the injection method needs to be completed in the hospital under the supervision of medical personnel, and a larger dose of the injection solution (2 ml) is used. -5ml) is injected into the human body once and used for routine treatment of patients in and out of the hospital. The other is to use a spring as a power to perform needle insertion and administration. The injection method can be automatic injection, that is, automatic needle injection, automatic administration, or semi-automatic injection, that is, automatic needle injection and manual administration. The two injection methods are only suitable for one-time injection of a larger dose of injection, which is suitable for first aid in patients inside and outside the hospital.

For some special patients in clinical practice, such as diabetes patients, hepatitis patients, etc., insulin, interferon, etc. are required, and the injection dose is small (0.1ml-0.5ml), but the injection dose accuracy is particularly high, and most cases require The patient injected himself. The aforementioned injection technique and its syringe have a low degree of automated injection, which cannot meet the self-injection needs of patients such as diabetic patients and hepatitis patients.

technical problem

The purpose of the utility model is to provide an adjustable injection pen, which solves the problems of low automation degree and insufficient injection dosage precision in the prior art injection, and can not meet the special needs of self-injection of patients such as diabetes patients and hepatitis patients.

Technical solution

The technical scheme adopted by the utility model is an adjustable injection pen, comprising a middle sheath and a core mounting barrel, the middle sheath and the core mounting barrel are threadedly sleeved, and the core of the medicine core mounting barrel is installed with a medicine core The outer surface of the core mounting barrel is mounted with a mounting sleeve; the outer surface of the middle sheath is provided with an outer sheath, and a dose display sleeve is disposed between the outer circumferential step of the bottom end of the middle sheath and the outer sheath, and the dose display sleeve is provided The bottom end is connected to the knob, and the button is provided with a button in the through hole; the inner cavity of the middle sheath is provided with an inner sheath, the inner sheath inner cavity is provided with a rack, and the top end of the rack is in contact with the rubber plug at the bottom end of the core The inner surface of the rack is provided with teeth, the double gear is installed in the tooth, the double gear is in contact with the gear seat at the top of the lock rod, and the other end of the lock rod is connected with the inner end of the button; the tooth facing one end of the core mounting barrel A friction block is disposed between the inner circumferential step of the top end of the strip and the middle sheath.

Beneficial effect

The utility model has the beneficial effects that it is easy to teach, easy to learn, simple, convenient, precise injection, and can adjust the injection dose for patients who have long relied on subcutaneous injection to treat diseases (such as diabetes, hepatitis, growth disorders, etc.). Self-injection and automatic injection mode, compared with similar products, the injection dose control is more precise, easy to carry, and the production cost is greatly reduced.

DRAWINGS

1 is a schematic cross-sectional structural view showing a state in which a device of the present invention is in a contracted state;

2 is a schematic cross-sectional view of the device of the present invention to be injected after adjusting the dose;

Figure 3 is a schematic cross-sectional view of the device of the present invention after the injection is completed;

4 is a schematic cross-sectional structural view of a control system of the device of the present invention;

Figure 5 is a schematic cross-sectional structural view of the control system of the device of the present invention;

Figure 6 is a schematic view showing the deployment structure of the dose display sleeve of the device of the present invention;

Figure 7 is a schematic view showing the deployment structure of the dose display sleeve of the device of the present invention;

Figure 8 is a top plan view of the rack structure in the device of the present invention;

Figure 9 is a cross-sectional view of the rack structure of Figure 8 in the X direction;

Figure 10 is a cross-sectional view in the Y direction of the rack structure of Figure 8;

In the figure, 1. button, 2. knob, 3. outer sheath, 4. inner sheath, 5. middle sheath, 6. rack, 7. mounting sleeve, 8. pen hanging, 9. core installation Cartridge, 10. Dose display sleeve, 11. Locking bar, 12. Friction block, 13. Double gear, 14. Drug core, 15. Rubber stopper, 16. Cartridge rubber stopper, 17. Double-blade injection needle.

Embodiments of the invention

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the structure of the device of the present invention comprises a middle sheath 5 and a core mounting barrel 9 . The inner surface of the inner sheath 5 is provided with an internal thread groove at both ends, and two internal thread grooves The inner surface is provided with a friction block groove, the middle sheath 5 and the core mounting barrel 9 are threadedly sleeved, and the core 14 is installed in the inner cavity of the core mounting barrel 9, and the outer surface of the core mounting barrel 9 is mounted. The outer casing 7 is provided with a pen hanger 8; the outer surface of the middle sheath 5 is fixedly mounted with an outer sheath 3, and the outer circumference of the bottom end of the middle sheath 5 is provided with a step, the outer circumferential step and the outer The cavity between the sheaths 3 is provided with a dose display sleeve 10, and the dose display sleeve 10 can display different adjustment amounts in the cavity movement, and the bottom end of the dose display sleeve 10 is fixedly connected with the knob 2, and the through hole of the knob 2 Button 1 is installed in the middle;

The inner cavity of the middle sheath 5 is sleeved with an inner sheath 4, and the outer surface of the inner sheath 4 is circumferentially provided with an annular tenon which cooperates with the inner thread groove of the middle sheath 5 to realize rotation, so that the middle guard The sleeve 5 and the inner sheath 4 move relative to each other (advance or retreat), and the inner sheath 4 is provided with a rack 6 of a push rod system, and the top end of the rack 6 is in contact with the rubber plug 15 at the bottom end of the core 14, and the rack 6 is inside. The surface is provided with teeth, and the intermeshing double gear 13 is mounted in the tooth, the double gear 13 is in contact with the gear seat at the top end of the lock rod 11, and the other end of the lock rod 11 is connected with the inner end of the button 1; A frictional block 12 of a rubber material is disposed between the rack 6 at one end of the cylinder 9 and the friction block groove (the inner circumferential step of the top end) of the intermediate sheath 5, and the friction block 12 is mounted in a skeleton-shaped groove on the outer surface of the top end of the rack 6.

Referring to Figures 4 and 5, the friction block 12 and its skeleton form a control system for gripping the rack 6. When the knob 2 is rotated, under the forced action of the middle sheath 5 and the inner sheath 4, the lock rod 11 will move outward, and the dose display sleeve 10 is controlled to display the required dose scale value, and the knob 2 is adjusted as needed. With a suitable injection dose, the control system holds the rack 6 by the friction of the friction block 12, and when the button 1 is pressed during the injection, the front end of the lock rod 11 will tighten the double gear 13, and the rack 6 moves to push the rubber stopper 15, to achieve the purpose of medicine.

Referring to FIG. 6 and FIG. 7, the dose display sleeve 10 is marked with a zero position and an injection unit along the circumference. When the knob 2 is rotated, the dose display sleeve 10 rotates together to adjust and display the required dose. The dose display sleeve 10 has a scale and a dose display sleeve. The amount of displacement of 10 along the outer circumferential step of the top end of the middle sheath 5 is equivalent to controlling the feed amount of the rack 6 and the rubber stopper 15.

8 , FIG. 9 and FIG. 10 are three-direction views of the rack 6 . The rack 6 of the top view has a U-shaped cross section, and the rack 6 is symmetrically disposed with teeth on the longitudinal inner surface diameter, and the double gear 13 is jacked up. Engagement; the rack 6 is threaded along the circumference of the longitudinal outer surface to be threadedly engaged with the inner surface of the inner sheath 4.

The operation method of the device of the utility model is:

Unscrew the mounting sleeve 7 and press the locking rod 11 in the push rod system back to the full entry. The gear seat at the top end of the locking rod 11 is in contact with the double gear 13 to lock the medicine core 14 into the core mounting barrel 9. Note that the core 14 (cartridge) is installed in the correct direction and intact, and the core mounting barrel 9 is reliably connected to the middle sheath 5 by threads, and the protective sheet of the double-edged injection needle 17 is torn off, and then the double-edged injection is performed. The needle 17 is tightly screwed on the mouth end of the medicine core 14; confirm that the dose display sleeve 10 is at the zero position, and at least one unit is taken as needed (the corresponding number of units are exposed from the bottom end of the adjustable injection pen), and the pick up can be picked up. Adjusting the pen to make the outer needle tip of the double-blade injection needle 17 upward, press the button 1, the lock rod 11 pushes the double gear 13 to drive the rack 6 to move the rubber stopper 15 to move until the medicine droplet is hung on the double-blade injection needle 17 On the outer needle tip, stop pressing the button 1;

The outer needle tip of the double-blade injection needle 17 is pierced at the corresponding injection site of the skin, and then the outer sheath 3 is grasped, and the button 1 is pushed, so that the knob 2 is gently rotated, and the rotary knob 2 drives the dose display sleeve 10 The middle sheath 5 and the inner sheath 4 rotate, and the inner sheath 4 finally drives the rack 6 (forward advancement) to rotate. Since the button 1 is pressed against the lock rod 11, the double gear 13 is locked, and the rack 6 can only be turned The front push rubber stopper 15 is compressed toward the outer needle tip of the double-blade injection needle 17, and the medical liquid is injected into the human body.

Claims

An adjustable injection pen characterized by comprising a middle sheath (5) and a core mounting barrel (9), the middle sheath (5) and the core mounting barrel (9) are threadedly sleeved, and the core mounting barrel (9) The inner cavity is provided with a drug core (14), and the outer surface of the core mounting barrel (9) is mounted with a mounting sleeve (7); the outer surface of the middle sheath (5) is provided with an outer sheath (3), A dose display sleeve (10) is disposed between the outer circumferential step of the middle sheath (5) and the outer sheath (3), and the bottom end of the dose display sleeve (10) is connected with the knob (2), and the knob (2) a button (1) is installed in the through hole; the inner cavity of the middle sheath (5) is provided with an inner sheath (4), and the inner sheath (4) is provided with a rack (6), a rack (6) The top end is in contact with the rubber plug (15) at the bottom end of the core (14), the inner surface of the rack (6) is provided with teeth, the double gear (13) is mounted in the tooth, the double gear (13) and the lock rod (11) The top gear seat is in contact connection, the other end of the lock rod (11) is connected to the inner end of the button (1); the top end of the rack (6) and the middle sheath (5) facing the end of the core mounting barrel (9) A friction block (12) is disposed between the inner circumferential steps.
The adjustable injection pen according to claim 1, characterized in that the friction block (12) is mounted in a skeleton-shaped groove on the outer surface of the top end of the rack (6).
The adjustable injection pen according to claim 1, characterized in that the dose display sleeve (10) is circumferentially marked with a zero position and an injection unit.
The adjustable injection pen according to claim 1, characterized in that: the rack (6) of the top view has a U-shaped cross section, and the rack (6) is symmetrically disposed with teeth on the longitudinal inner surface diameter, and the double The gear (13) is advanced into engagement; the rack (6) is threaded along the circumference of the longitudinal outer surface and threadedly engages the inner surface of the inner sheath (4).
The adjustable injection pen according to claim 1, characterized in that the top end of the mounting sleeve (7) is provided with a pen holder (8).