CN221950359U - Insulin injection pen with needle retraction function - Google Patents

Abstract

The utility model discloses an insulin injection pen with a needle contraction function, which relates to the field of medical appliances and comprises a pen holder, wherein a push rod extending outwards is connected in a sliding manner in the pen holder, an outer shell is connected with the end part of the pen holder in a threaded manner, an inner shell is fixedly connected with the inner wall of the outer shell, an installation head is inserted into the output end of the inner shell, a needle is installed at the central position of the installation head, and a protection mechanism is installed on the outer wall of the outer shell and used for hiding the needle. According to the utility model, the protective shell moves towards the direction close to the needle under the action of external force, so that the needle passes through the through hole and is exposed outside the protective shell, the spring in a reset state drives the protective shell to move towards the direction away from the needle, the protective shell is sleeved outside the needle, the protective shell conceals the needle, and the condition that the needle exposed outside is stabbed by nurses can be avoided.

Description

Insulin injection pen with needle retraction function

Technical Field

The utility model relates to the field of medical instruments, in particular to an insulin injection pen with a needle retraction function.

Background Art

The insulin injection pen saves patients from the tedious process of using a syringe to draw insulin from an insulin bottle. It can save patients from the embarrassment of injecting insulin in public places and bring convenience to patients with poor eyesight or even blindness in injecting insulin.

When a patient goes to the hospital for treatment of diabetes, a nurse is required to use an insulin injection pen to inject insulin into the patient. The existing insulin injection pen mainly consists of a pen body, a pen cap, and a needle. When using the insulin injection pen, the pen cap is first removed from the pen body and placed aside, so that the needle is exposed to the outside for injection into the patient. However, after the nurse has finished injecting insulin into the patient, there is not enough time to put the pen cap back on, resulting in the situation where the needle exposed to the outside can easily stab the nurse.

Utility Model Content

The utility model aims to provide an insulin injection pen with a needle retracting function in order to solve the problem that the needle exposed to the outside is easy to stab the nurse.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an insulin injection pen with a needle retracting function, comprising a pen holder, a push rod extending outward is slidably connected to the inside of the pen holder, an outer shell is threadedly connected to the end of the pen holder, an inner shell is fixedly connected to the inner wall of the outer shell, and the pen holder is connected to the inner shell, an installation head is plugged into the output end of the inner shell, a needle is installed at the center of the installation head, and a protective mechanism is installed on the outer wall of the outer shell, and the protective mechanism is used to hide the needle;

The protection mechanism includes a protection shell component and a moving component;

The protective shell assembly is used to hide the needle;

The moving component is used to assist the protective shell component in reciprocating movement.

As a further solution of the utility model: the protective shell assembly includes a protective shell and a through hole;

The protective shell is located below the mounting head, the through hole is opened on the outer wall of the protective shell and completely penetrates through it, and the through hole is used for the needle to penetrate through it.

As a further solution of the utility model: the moving assembly includes a fixing part, a spring, a slide groove, a connecting rod, and a slider;

The fixing piece is fixedly connected to the outer wall of the shell, the slide groove is opened on the outer wall of the fixing piece and extends inwardly thereof, the connecting rod is slidably connected to the inside of the slide groove and extends outwardly thereof, the sliding block is slidably connected to the inside of the slide groove, the spring is installed in the inside of the slide groove, and the end of the spring is fixedly connected to one end of the sliding block.

As a further solution of the utility model: the slider and the slide groove are both T-shaped structures, and the inner wall of the slide groove is consistent with the outer wall of the slider.

As a further solution of the utility model: one end of the connecting rod is fixedly connected to the other end of the sliding block, and the other end of the connecting rod is fixedly connected to the protective shell.

As a further solution of the utility model: the protective shell moving toward the needle head is used to compress the spring, and the spring in the reset state is used to drive the protective shell to move toward the needle head.

Compared with the prior art, the beneficial effects of the utility model are:

By setting up a protective mechanism, the protective shell moves towards the needle under the action of external force, so that the needle passes through the through hole and is exposed outside the protective shell. The spring in the reset state drives the protective shell to move away from the needle, so that the protective shell is covered on the outside of the needle. The protective shell hides the needle, thereby preventing the nurse from being stabbed by the needle exposed to the outside.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

FIG2 is a schematic diagram of the structure of the protection mechanism of the utility model;

FIG. 3 is a schematic diagram of the structure of the lower half of the utility model.

In the figure: 1. pen holder; 2. outer shell; 3. push rod; 4. protective mechanism; 401. protective shell; 402. through hole; 403. fixing part; 404. spring; 405. slide groove; 406. connecting rod; 407. slider; 5. needle; 6. mounting head; 7. inner shell.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1 to 3. In the embodiment of the utility model, an insulin injection pen with a needle retracting function includes a pen holder 1, a push rod 3 extending outward is slidably connected inside the pen holder 1, an outer shell 2 is threadedly connected to the end of the pen holder 1, an inner shell 7 is fixedly connected to the inner wall of the outer shell 2, and the pen holder 1 is connected to the inner shell 7, an installation head 6 is plugged into the output end of the inner shell 7, a needle 5 is installed at the center of the installation head 6, and a protective mechanism 4 is installed on the outer wall of the outer shell 2, and the protective mechanism 4 is used to hide the needle 5;

The protection mechanism 4 includes a protection shell component and a moving component;

The protective shell assembly is used to hide the needle 5;

The moving component is used to assist the protective shell component to perform reciprocating movement.

In this embodiment: when it is necessary to inject insulin to the patient, firstly, insulin solution is placed inside the inner shell 7, and then the nurse holds the pen shaft 1 and aligns the protective shell 401 with the patient's skin surface. At this time, the hand of the nurse applies downward pressure to the pen shaft 1, and the protective shell 401 abuts against the patient's skin surface, so that the protective shell 401 drives the through hole 402 to move toward the direction close to the needle 5 under the reaction force. At this time, the protective shell 401 drives the connecting rod 406 to move inside the slide groove 405, and the connecting rod 406 drives the slider 407 to move inward along the trajectory of the slide groove 405, and the slider 407 squeezes the spring 404, and the spring 404 is compressed by force, so that the needle 5 completely passes through the through hole 402, so that the needle 5 is exposed outside the protective shell 401. At this time, the nurse pushes the push rod 3 with her hand, so that the push rod 3 pushes the piston inside the inner shell 7, and the piston pushes the insulin solution to the needle 5 area, so that the needle 5 exposed outside is injected into the patient.

When the insulin injection is completed, the nurse separates the protective shell 401 from the patient's skin surface. At this time, the spring 404 in the reset state drives the slider 407 to move outward along the track of the slide groove 405, and the slider 407 drives the protective shell 401 to move away from the needle 5 through the connecting rod 406, so that the protective shell 401 is sleeved on the outside of the needle 5, and the protective shell 401 hides the needle 5.

It should be noted that when the protective shell 401 is at the lowest point, the distance between the protective shell 401 and the outer shell 2 is sufficient to remove the mounting head 6 and the needle 5 .

Please refer to FIG. 2 , the protective shell assembly includes a protective shell 401 and a through hole 402 ;

The protective shell 401 is located below the mounting head 6 , and a through hole 402 is formed on the outer wall of the protective shell 401 and completely penetrates through the protective shell 401 . The through hole 402 is used for the needle 5 to penetrate through.

In this embodiment, downward pressure is applied to the pen holder 1 by the hand guard, and the protective shell 401 contacts the surface of the patient's skin, so that the protective shell 401 drives the through hole 402 to move toward the needle 5 under the reaction force.

Please refer to 3 in particular, the moving assembly includes a fixing member 403, a spring 404, a slide groove 405, a connecting rod 406, and a slider 407;

The fixing member 403 is fixedly connected to the outer wall of the housing 2, the slide groove 405 is opened on the outer wall of the fixing member 403 and extends inwardly thereof, the connecting rod 406 is slidably connected to the inside of the slide groove 405 and extends outwardly thereof, the slider 407 is slidably connected to the inside of the slide groove 405, the spring 404 is installed in the inside of the slide groove 405, and the end of the spring 404 is fixedly connected to one end of the slider 407.

In this embodiment: the protective shell 401 drives the through hole 402 to move towards the direction close to the needle 5 under the reaction force. At this time, the protective shell 401 drives the connecting rod 406 to move into the inside of the slide groove 405, and the connecting rod 406 drives the slider 407 to move inward along the trajectory of the slide groove 405. The slider 407 squeezes the spring 404, and the spring 404 is compressed, so that the needle 5 completely passes through the through hole 402, so that the needle 5 is exposed in the protective shell 401. At this time, the nurse pushes the push rod 3 with her hand, so that the push rod 3 pushes the piston inside the inner shell 7, and the piston pushes the liquid medicine to the needle 5 area, so that the needle 5 exposed outside is injected into the patient.

Please refer to FIG. 3 in particular. The slider 407 and the slide groove 405 are both T-shaped structures, and the inner wall of the slide groove 405 is consistent with the outer wall of the slider 407 .

In this embodiment, the slider 407 moves inside the slide groove 405 along the track thereof. Since the slider 407 and the slide groove 405 are both in a T-shaped structure, the slider 407 is prevented from being separated from the slide groove 405 when moving.

Please refer to FIG. 3 , one end of the connecting rod 406 is fixedly connected to the other end of the sliding block 407 , and the other end of the connecting rod 406 is fixedly connected to the protective shell 401 .

In this embodiment: the protective shell 401 drives the connecting rod 406 to move, and the connecting rod 406 drives the sliding block 407 to move.

Please refer to FIG. 2 in particular. The protective shell 401 moving toward the needle 5 is used to press the spring 404 , and the spring 404 in the reset state is used to drive the protective shell 401 to move away from the needle 5 .

In this embodiment: the spring 404 in the reset state drives the slider 407 to move outward along the track of the slide groove 405, and the slider 407 drives the protective shell 401 to move away from the needle 5 through the connecting rod 406, so that the protective shell 401 is sleeved on the outside of the needle 5, and the protective shell 401 hides the needle 5;

When the mounting head 6 and the needle 5 need to be replaced, the mounting head 6 is separated from the end of the inner shell 7 (the two are plugged in) by inserting a hand or a tool between the outer shell 2 and the protective shell 401 and pulling the mounting head 6. It should be noted that when the protective shell 401 is at the lowest point, the distance between the protective shell 401 and the outer shell 2 is sufficient to remove the mounting head 6 and the needle 5, so as to facilitate the installation of a new needle for use again.

What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims (6)

1. The insulin injection pen with the needle shrinkage function comprises a pen holder (1), wherein a push rod (3) extending outwards is connected inside the pen holder (1) in a sliding manner, an outer shell (2) is connected to the end portion of the pen holder (1) in a threaded manner, an inner shell (7) is fixedly connected to the inner wall of the outer shell (2), the pen holder (1) is communicated with the inner shell (7), an installation head (6) is inserted into the output end of the inner shell (7), a needle head (5) is installed at the central position of the installation head (6), and the insulin injection pen is characterized in that a protection mechanism (4) is installed on the outer wall of the outer shell (2), and the protection mechanism (4) is used for hiding the needle head (5);

the protection mechanism (4) comprises a protection shell component and a moving component;

the protective shell component is used for hiding the needle head (5);

The moving component is used for assisting the protecting shell component to reciprocate.

2. An insulin injection pen with needle retraction function according to claim 1, characterized in that the shield assembly comprises a shield (401) and a through hole (402);

The protective shell (401) is located below the mounting head (6), the through hole (402) is formed in the outer wall of the protective shell (401) and penetrates completely, and the through hole (402) is used for penetrating the needle head (5).

3. An insulin injection pen with needle retraction function according to claim 1, characterized in that the moving assembly comprises a fixed part (403), a spring (404), a chute (405), a link (406), a slider (407);

The fixing piece (403) is fixedly connected to the outer wall of the shell (2), the sliding groove (405) is formed in the outer wall of the fixing piece (403) and extends towards the inside of the fixing piece, the connecting rod (406) is connected to the inside of the sliding groove (405) in a sliding mode and extends towards the outside of the sliding groove, the sliding block (407) is connected to the inside of the sliding groove (405) in a sliding mode, the spring (404) is installed in the inside of the sliding groove (405), and the end portion of the spring (404) is fixedly connected with one end of the sliding block (407).

4. An insulin injection pen with needle retraction function according to claim 3, characterized in that the slide block (407) and the slide groove (405) are of a T-shaped structure, and the inner wall of the slide groove (405) is matched with the outer wall of the slide block (407).

5. An insulin injection pen with needle retraction function according to claim 3, characterized in that one end of the connecting rod (406) is fixedly connected with the other end of the slider (407), and the other end of the connecting rod (406) is fixedly connected with the protective housing (401).

6. An insulin injection pen with needle retraction function according to claim 3, characterized in that the guard (401) moving towards the needle (5) is arranged to press the spring (404), and that the spring (404) in the reset state is arranged to move the guard (401) away from the needle (5).