Drug transport device

Abstract

This invention discloses a drug transport device comprising a pen cap, a drug dispensing mechanism provided on the right side of the pen cap, and an adjustment mechanism provided on the right end surface of the drug dispensing mechanism. The drug dispensing mechanism includes a dispensing section and a connecting section, with the side of the dispensing section connected to the side of the connecting section. The connecting section includes a pen rod, with the left side of the pen rod and the right side of the pen cap connected through it. The adjustment mechanism includes an adjustment section and an observation section, with the side of the adjustment section connected to the side of the observation section. The adjustment section includes a knob, with the left end surface of the knob connected to the right side of the pen rod. The drug transport device of this invention incorporates an adjustment mechanism. The cooperation of the knob and the scale sleeve allows for repeated adjustment of the transport amount, avoiding drug waste, preventing displacement of the button during the adjustment process, making injection more convenient, simplifying the product transmission mechanism, and optimizing the components.

Description

Technical Field

[0001] The present invention relates to the technical field of drug transportation, and specifically to a drug transportation device.

Background Art

[0002] An injection pen, also called a drug pen, is a device for injecting drugs subcutaneously. It aims to facilitate and simplify the use of injectable drugs and improve patient adherence.

[0003] Chinese Utility Model Publication No. CN204337431U discloses a drug injection pen including a casing and a dose setting knob rotatable relative to the casing. In the drug injection pen, a braking assembly is disposed in the casing and has a ratchet member, and a driver includes at least one external tooth.

[0004] However, it has the following disadvantages. A drug injection pen that can be easily customized and simply assembled by using the prior art is provided. However, since the ratchet used in the prior art is installed at the knob position, the knob according to the utility model can only rotate in one direction, and the drug syringe can only increase the dose, but cannot decrease the dose. If the adjusted dose exceeds the planned amount, it becomes irreversible, and the drug can only be supplied with an empty syringe, causing waste of the drug.

[0005] Therefore, the present invention designs a drug transportation device to solve the technical problems that have long existed in the prior art.

Summary of the Invention

[0006] The object of the present invention is to provide a drug transportation device to solve the technical problems presented in the background art.

[0007] To achieve the above objective, the present invention provides the following technical solution. The drug transport device comprises a pen cap, a drug dispensing mechanism provided on the right side of the pen cap, an adjustment mechanism fixed to the right end face of the drug dispensing mechanism, a ratchet sleeve provided on the inner wall of the right end of the pen cap, and a drive ratchet provided on the inner wall of the ratchet sleeve. The drug dispensing mechanism further includes a dispensing section and a connecting section, the side of the dispensing section being connected to the side of the connecting section. The connecting section further includes a pen rod, the left side of the pen rod and the right side of the pen cap are connected through a ratchet sleeve, a drive rod is provided inside the pen rod, a push rod is further provided inside the drive rod, the side of the push rod and the inner wall of the drive rod are in sliding contact, and the side of the push rod and the side of the drive ratchet are connected. The adjustment mechanism further includes an adjustment section and an observation section, the side of the adjustment section being connected to the side of the observation section, The adjustment section further includes a knob, the left end face of which connects to the right side face of the pen shaft.

[0008] Preferably, a button is provided on the right end face of the knob, the left end face of the button extends through the knob into the interior of the drive rod, the side of the button and the inner wall of the knob slide against each other, and the side of the button and the inner wall of the knob make airtight contact, and the button can be directly pressed to transport the drug.

[0009] Preferably, a return spring is fitted to the surface of the drive rod, and the left end surface of the button is sealed, pushed out, and in contact with the inner wall of the drive rod, so that the return spring can return to its original position in a timely manner when the button is fully pressed.

[0010] Preferably, a locking ring is provided on the inner wall of the right end of the pen rod, the side of the drive rod and the inner wall of the locking ring slide against each other, the right end surface of the return spring connects with the inner wall of the locking ring, and the locking ring can fix the knob position.

[0011] Preferably, a power spring is fitted to the left end surface of the drive rod, the left end surface of the power spring is connected to the right end surface of the ratchet sleeve, a scale sleeve is provided inside the pen rod, the right end surface of the power spring is connected to the inner wall of the scale sleeve, the side surface of the scale sleeve is in sliding contact with the inner wall of the pen rod, and the scale sleeve allows the operator to observe the measurement of the output.

[0012] Preferably, a drug cartridge is provided on the inner wall of the pen cap, a cartridge bottle is placed on the inner wall of the drug cartridge, the inner wall of the drug cartridge and the surface of the cartridge bottle are in sliding contact, and the drug is dispensed into the inside of the drug cartridge.

[0013] Preferably, a cartridge bottle rubber stopper is provided on the inner wall of the right end of the cartridge bottle, a push rod washer is provided on the right side of the cartridge bottle rubber stopper, the left end surface of the push rod and the right side surface of the cartridge bottle rubber stopper are in extrusion contact, and the push rod washer can exert the effect of linear motion of the push rod in the lateral direction.

[0014] Preferably, a sleeve frame is provided on the top surface of the pen cap, making it convenient to leave the pen cap in place.

[0015] Compared to conventional technology, this invention offers the following advantages: The drug transport device incorporates an adjustment mechanism, and the cooperation of the knob and scale sleeve allows for repeated adjustment of the transport volume, enabling more precise adjustment and avoiding drug waste. The adjustment process does not cause displacement of the button, making injection more convenient. The product transmission mechanism is simplified, and the components are optimized.

[0016] Specifically, this invention operates by installing a drive ratchet, ratchet sleeve, and push rod, which linearize the force received by the rubber stopper, keeping it in a balanced state without the influence of external forces in other directions, and preventing errors in injection dosage. Furthermore, by installing a drug dispensing mechanism, the non-rotating linear motion, compared to conventional rotational linear motion, reduces the decomposition of forces and the resistance force due to friction, and generates only linear motion. At the same time, the push rod, push rod washer, and cartridge bottle rubber stopper do not generate relative displacement or rotation, thus avoiding improper injection measurement due to deformation or displacement generated during the extrusion process. [Brief explanation of the drawing]

[0017] [Figure 1] Figure 1 is a perspective view of the present invention. [Figure 2] Figure 2 is a cross-sectional view of the present invention. [Figure 3] Figure 3 is a perspective view of area A in Figure 2. [Figure 4] Figure 4 is a perspective view of area B in Figure 2. [Figure 5] Figure 5 is a perspective view of region C in Figure 2. [Figure 6] Figure 6 is a cross-sectional view of another operating state of the present invention. [Modes for carrying out the invention]

[0018] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, but it is clear that the embodiments described are only a part of the embodiments of the present invention and not all embodiments. All other embodiments that a person skilled in the art could obtain without creative work based on the embodiments of the present invention are within the scope of the protection of the present invention.

[0019] <Embodiment 1> Referring to FIGS. 1 to 6, the present invention provides a technical solution. The drug delivery device includes a pen cap 1, a drug delivery mechanism 101 is provided on the right side surface of the pen cap 1, and an adjustment mechanism 201 is provided on the right end surface of the drug delivery mechanism 101. The drug delivery mechanism 101 further includes a drug delivery part and a connection part. The side surface of the drug delivery part is connected to the side surface of the connection part. The connection part includes a pen rod 14, and the left side surface of the pen rod 14 is connected to the right side surface of the pen cap 1 in a penetrating manner.

[0020] A button 8 is provided on the right end surface of the knob 16. The left end surface of the button 8 penetrates through the knob 16 and extends to the inside of the drive rod 6. The side surface of the button 8 is in sliding contact with the inner wall of the knob 16. The side surface of the button 8 is in sealing contact with the inner wall of the knob 16. A drive rod 6 is provided inside the pen rod 14. A return spring 7 is fitted on the surface of the drive rod 6. The left end surface of the button 8 is in sealing extrusion and contact with the inner wall of the drive rod 6.

[0021] A power spring 5 is fitted on the left end surface of the drive rod 6. The left end surface of the power spring 5 is connected to the right end surface of the ratchet sleeve 11. A scale sleeve 13 is provided inside the pen rod 14. The right end surface of the power spring 5 is connected to the inner wall of the scale sleeve 13. The side surface of the scale sleeve 13 is in sliding contact with the inner wall of the pen rod 14.

[0022] Furthermore, by installing the drug delivery mechanism 101, compared with the conventional rotational linear motion, the non-rotational linear motion reduces the force decomposition and the resistance due to friction. When only generating linear motion, at the same time, the push rod 12, the push rod washer 9, and the cartridge bottle rubber stopper 4 do not generate relative displacement and rotation, avoiding the improper injection measurement due to the deformation or displacement generated during the extrusion process.

[0023] <Embodiment 2> Based on Embodiment 1, continue to refer to FIGS. 1 to 6. The adjustment mechanism 201 further includes an adjustment part and an observation part. The side surface of the adjustment part is connected to the side surface of the observation part. The adjustment part includes a knob 16. The left end surface of the knob is connected to the right side surface of the pen rod 14. A push rod 12 is provided inside the drive rod 6. The side surface of the push rod 12 is in sliding contact with the inner wall of the drive rod 6.

[0024] An agent cartridge 2 is provided on the inner wall of the paint cap 1, a cartridge bottle 3 is provided on the inner wall of the agent cartridge 2, the inner wall of the agent cartridge 2 and the surface of the cartridge bottle 3 are in sliding contact, a cartridge bottle rubber stopper 4 is provided on the inner wall at the right end of the cartridge bottle 3, and a push rod washer 9 is provided on the right side surface of the cartridge bottle rubber stopper 4. The left end face of the push rod 12 and the right side surface of the cartridge bottle rubber stopper 4 are in extrusion contact.

[0025] A ratchet sleeve 11 is provided on the inner wall at the right end of the paint cap 1. The left side surface of the pen rod 14 and the right side surface of the paint cap 1 are penetrated and connected by the ratchet sleeve 11. A driving ratchet 10 is provided on the inner wall of the ratchet sleeve 11. The side surface of the push rod 12 is connected to the side surface of the driving ratchet 10, and a sleeve frame 17 is provided on the top surface of the paint cap 1. A locking ring 15 is provided on the inner wall at the right end of the pen rod 14. The side surface of the driving shaft 6 and the inner wall of the locking ring 15 are in sliding contact, and the right end face of the return spring 7 and the inner wall of the locking ring 15 are connected.

[0026] The agent in the cartridge bottle 3 can be injected once or divided into several times. Once the injection is finished, it should be discarded immediately and not replaced with a new cartridge bottle 3. After the injection is finished, if there is a next injection, the user only needs to remove the needle and replace it with a new needle when the next injection is made.

[0027] Furthermore, the agent transportation device of the present invention installs an adjustment mechanism 201. Through the cooperation of the knob 16 and the scale sleeve 13, it can be repeated when adjusting the transportation amount, making the adjustment of the agent dosage more accurate, avoiding the waste of the agent, not causing displacement to the button during the adjustment process of the adjustment amount, facilitating injection, simplifying the product transmission mechanism, and optimizing the components.

[0028] Furthermore, by installing the drive ratchet 10 and ratchet sleeve 11, the push rod 12 generates only linear motion and no rotational motion, making the force received by the cartridge bottle rubber stopper 4 linear and free from the influence of external forces in other directions. This effectively improves upon the shortcomings of conventional push rods, which add rotational motion to linear motion, keeping the cartridge bottle rubber stopper 4 in a balanced state and avoiding the generation of excessive errors in the amount of injectable drug.

[0029] When using the device, the user rotates the drive rod 6 by turning the knob 16 clockwise, which rotates the scale sleeve 13 to the right, compressing the power spring 5 to adjust to the required amount of chemical to be measured. After that, the user loosens the knob 16 and uses the lock ring 15 to stop it from moving.

[0030] When it is necessary to adjust the amount of medication measured, the drive rod 6 is rotated by turning the knob 16 counterclockwise, which rotates the scale sleeve 13 to the left and rebounds the power spring 5. In particular, the power spring 5 of this invention may be a compression spring, a tension spring, or a torsion spring, and the type of spring of this invention is not limited to the type of spring, as technicians in the art can select the most suitable type of spring according to the actual design requirements.

[0031] After adjusting to the required amount of medication, loosening the knob 16 and using the lock ring 15 to stop it from moving allows the medication amount to be adjusted to the required precise amount. Pressing the button 8 releases the drive rod 6 from the control of the knob 16, compressing the return spring 7, which causes the rod pin of the drive rod 6 to enter the drive ratchet 10. The compressed power spring 5 then springs back, driving the scale sleeve to rotate counterclockwise. This causes the drive rod 6 to drive the drive ratchet 10, which moves the push rod 12 to the left. The push rod washer 9 pushes out the cartridge bottle rubber stopper 4, performing the medication dispensing operation.

[0032] While embodiments of the present invention have been illustrated and described, those skilled in the art will understand that various modifications, alterations, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. [Explanation of Symbols]

[0033] 1 Pen cap, 2 Medication cartridge, 3 Cartridge bottle, 4 Cartridge bottle rubber stopper, 5 Power spring, 6 Drive rod, 7 Reset spring, 8 Button, 9 Push rod washer, 10 Drive ratchet, 11 Ratchet sleeve, 12 Push rod, 13 Scale sleeve, 14 Pen stick, 15 Lock ring, 16 Knob, 17 Sleeve frame, 101 Dispensing mechanism, 201 Adjustment mechanism

Claims

1. A drug transport device comprising a pen cap (1), a drug dispensing mechanism (101) provided on the right side of the pen cap (1), an adjustment mechanism (201) fixed to the right end face of the drug dispensing mechanism (101), a ratchet sleeve (11) provided on the inner wall of the right end of the pen cap (1), and a drive ratchet (10) provided on the inner wall of the ratchet sleeve (11), The drug dispensing mechanism (101) further includes a drug dispensing section and a connecting section, the side surface of the drug dispensing section is connected to the side surface of the connecting section, The connecting portion further includes a pen rod (14), the left side of the pen rod (14) and the right side of the pen cap (1) are connected through the ratchet sleeve (11), a drive rod (6) is provided inside the pen rod (14), a push rod is further provided inside the drive rod (6), the side of the push rod (12) and the inner wall of the drive rod (6) are in sliding contact, and the side of the push rod (12) and the side of the drive ratchet (10) are connected. The adjustment mechanism (201) further includes an adjustment section and an observation section, the side surface of the adjustment section is connected to the side surface of the observation section, The adjustment part further includes a knob (16), the left end face of the knob (16) is connected to the right side face of the pen rod (14), A power spring (5) is fitted to the left end surface of the drive rod (6). The left end face of the power spring (5) and the right end face of the ratchet sleeve (11) are connected. A scale sleeve (13) is provided inside the pen stick (14). The right end face of the power spring (5) and the inner wall of the scale sleeve (13) are connected. A drug transport device characterized in that the side surface of the scale sleeve (13) and the inner wall of the pen rod (14) are in sliding contact.

2. A button (8) is provided on the right end face of the knob (16). The left end face of the button (8) extends through the knob (16) into the interior of the drive rod (6), The side surface of the button (8) and the inner wall of the knob (16) are in sliding contact. The drug transport device according to claim 1, characterized in that the side surface of the button (8) and the inner wall of the knob (16) are in sealed contact.

3. A return spring (7) is fixedly fitted to the surface of the drive rod (6). The drug transport device according to claim 2, characterized in that the left end surface of the button (8) is sealed, extruded, and in contact with the inner wall of the drive rod (6).

4. A locking ring (15) is provided on the inner wall of the right end of the pen stick (14). The side surface of the drive rod (6) and the inner wall of the lock ring (15) are in sliding contact. The drug transport device according to claim 3, characterized in that the right end face of the return spring (7) is connected to the inner wall of the lock ring (15).

5. A drug cartridge (2) is provided on the inner wall of the pen cap (1). A cartridge bottle (3) is installed on the inner wall of the aforementioned drug cartridge (2). The drug transport device according to claim 1, characterized in that the inner wall of the drug cartridge (2) and the surface of the cartridge bottle (3) are in sliding contact.

6. A cartridge bottle rubber stopper (4) is provided on the inner wall of the right end of the cartridge bottle (3). A push rod washer (9) is provided on the right side of the cartridge bottle rubber stopper (4). The drug transport device according to claim 5, characterized in that the left end surface of the push rod (12) and the right side surface of the cartridge bottle rubber stopper (4) are in extrusion contact.

7. The drug transport device according to claim 1, characterized in that a sleeve frame (17) is provided on the top surface of the pen cap (1).

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