KR102619178B1 - Apparatus for Infusing medical liquid - Google Patents

Abstract

The present invention relates to a drug injection device configured to easily determine whether a needle mounted on a needle holder is inserted into a patient by simultaneously sliding the needle holder and sensing whether it is adjacent to a needle penetration hole.

Description

Medical liquid injection device {Apparatus for Infusing medical liquid}

It relates to a chemical injection device.

Medicine injection devices, such as insulin injection devices, are used to inject medicine into the patient's body. They are sometimes used by professional medical staff such as doctors or nurses, but in most cases, they are used by the general public, such as the patients themselves or their guardians. . And because the patient often has to take the medication injected through this medication injection device for a long period of time, the patient experiences the pain of having the needle of the medication injection device inserted several times.

This medicine injection device has a needle that discharges the medicine and this needle must be inserted into the patient's body, and in this process, the patient inevitably experiences pain due to the insertion of the needle. In addition, the pain caused by needle insertion can cause patients to fear the drug injection device, which can ultimately cause resistance to the drug injection device. In addition, fear of needle insertion may make it difficult for the patient to objectively recognize whether the needle has been sufficiently inserted into the patient. Accordingly, there is a risk that the patient may inject medication even though the needle has not been fully inserted.

Embodiments of the present invention are intended to solve the problems and/or limitations described above, and provide a drug injection device that can minimize pain and fear of needle insertion and enable it to clearly determine whether the needle is inserted. There is a purpose.

In order to achieve the above object, one embodiment includes a casing having a needle through-hole, a button exposed to the outside of the casing, located within the casing and coupled to the needle, and positioned opposite the needle through-hole, and the button. A needle holder provided to drive toward the needle through hole by the operation of, a sensor located in the casing and provided to sense whether the needle holder is adjacent to the needle through hole, and a controller electrically connected to the sensor. It is possible to provide a chemical injection device including a.

The sensor may include a first sensing member located adjacent to the needle through hole and a second sensing member coupled to the needle holder and positioned opposite the first sensing member.

It may further include a notification element that is electrically connected to the sensor and is provided to generate a notification when the needle holder is adjacent to the needle through hole.

The controller includes a first processor provided to control the injection of the chemical solution through the needle, and the sensor to determine whether the needle holder is adjacent to the needle through hole, and to determine whether the needle holder is adjacent to the needle through hole. When adjacent, it may include a second processor provided to inject the chemical solution through the first processor.

a spring interposed between the button and the needle holder;

It is located within the casing and may further include a guiding member supporting the needle holder.

According to another embodiment, a casing including a base on which a needle through hole is formed, a needle holder located in the casing, coupled to a needle, and provided to drive toward the needle through hole, and located in the casing, the needle holder. It includes a sensor provided to sense whether it is adjacent to the needle through hole, and a controller electrically connected to the sensor, wherein the needle holder is positioned to be spaced apart from the base in a first state, and the needle is in a second state. It is provided to be located adjacent to the through hole, and the controller may be provided to determine whether the needle holder is adjacent to the needle through hole in the second state.

The sensor may include a first sensing member located adjacent to the needle through hole and a second sensing member coupled to the needle holder and positioned opposite the first sensing member.

It may further include a notification element that is electrically connected to the sensor and is provided to generate a notification when the needle holder is adjacent to the needle through hole in the second state.

The controller includes a first processor provided to control injection of the chemical solution through the needle, and, in the second state, when the needle holder is adjacent to the needle through hole, the controller performs injection of the chemical solution through the first processor. It may include a second processor equipped to do so.

It may further include a spring provided to support the needle holder, and the needle holder may be provided to be driven toward the needle through hole by the elasticity of the spring when the needle holder progresses from the first state to the second state.

The guiding member may include a second support provided to support the first support in the first state.

According to the embodiments of the present invention as described above, the needle holder is slid at once using the elasticity of the spring, so that the needle mounted on the needle holder can be instantly inserted into the patient.

Due to the instantaneous insertion of the needle, the pain suffered by the patient can be minimized and the patient's fear caused by the needle can be reduced.

Therefore, patients who need to receive medication for a long period of time can reduce their aversion to the medication injection device, and contribute to the patient's treatment and/or health by ensuring that the medication is smoothly injected into the patient.

Since it is possible to check whether the needle has been sufficiently discharged and inserted into the patient by detecting whether the needle has been discharged rather than through the patient's senses, more accurate injection of the medicine can be achieved.

Additionally, by ensuring that the drug is injected only when the needle is fully discharged, the patient can easily determine the exact timing for drug injection and ensure that the drug is accurately injected into the target area.

1 is a perspective view of a chemical injection device according to an embodiment.
FIG. 2 is an exploded perspective view of the chemical injection device shown in FIG. 1.
Figure 3 is a perspective view of a button according to one embodiment.
Figure 4 is a bottom perspective view of the button shown in Figure 3.
Figure 5 is a perspective view of a needle holder according to one embodiment.
Figure 6 is a bottom view of the needle holder shown in Figure 5.
Figure 7 is a plan view of a second casing according to one embodiment.
FIG. 8 is a partial perspective view showing a portion of the second casing shown in FIG. 7.
Figure 9 is a schematic configuration diagram of a sensor and a controller according to an embodiment.
Figures 10a and 10b are diagrams showing the states of the needle holder and the guiding member in the first state and the second state, respectively.
Figure 11 is a perspective view of a needle cover assembly according to one embodiment.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the drawings, identical or corresponding components will be assigned the same reference numerals and redundant description thereof will be omitted. .

In the following examples, singular terms include plural terms unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that the features or components described in the specification exist, and do not exclude in advance the possibility of adding one or more other features or components.

In the following embodiments, when a part of a film, region, component, etc. is said to be on or on another part, it is not only the case where it is directly on top of the other part, but also when another film, region, component, etc. is interposed between them. Also includes cases where there are.

In cases where an embodiment can be implemented differently, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially at the same time, or may be performed in an order opposite to that in which they are described.

In the drawings, the sizes of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the following embodiments are not necessarily limited to what is shown.

1 is a perspective view of a chemical injection device according to an embodiment.

The chemical injection device 100 according to one embodiment has a button 120 exposed on one side and a needle cover assembly 190 on the other side.

The button 120 is provided so that the user can press and/or rotate it and is exposed to the user. The needle cover assembly 190 is provided to protect the needle, and can be removed when the user uses the chemical injection device 100.

The chemical injection device as described above may be configured in more detail as can be seen in FIG. 2 .

The chemical injection device according to one embodiment may include a casing, and the casing may include a first casing 110 and a second casing 150 that are coupled to each other.

The first casing 110 is a part that is exposed to the user even after the user attaches the chemical injection device to the body, and an opening 111 is formed in a part of the first casing 110. The button 120 may pass through the opening 111, and the button 120 may be exposed to the user.

Between the first casing 110 and the second casing 150 that are coupled to each other, that is, inside the casing, a button 120, a spring 130, a needle holder 140, a pump 160, and a chemical storage unit are provided. 170, sensor 183, and controller 180 may be located.

Although not shown in the drawing, the chemical storage unit 170 may include a reservoir for storing the chemical and a piston that enables discharge of the chemical. However, the chemical storage unit 170 is not necessarily limited to this and may include only the storage tank. The drug solution may be a liquid containing a drug such as insulin.

The chemical liquid storage unit 170 may be connected to the pump 160 through a liquid connection member such as a tube. The pump 160 is configured to pump a chemical solution in the direction of the needle holder 140, and can pump a constant amount of chemical solution according to the pumping cycle. This pump 160 may be electrically connected to a separate power source (not shown) and electrically connected to the controller 180, and the controller 180 may control the injection of the chemical solution through the pump 160. The pump 160 may be provided to suck the chemical solution from the chemical liquid storage unit 170 and discharge it to the needle holder 140.

The pump 160 can be any type of pump that has chemical suction power and chemical discharge power by electricity. For example, all types of pumps, such as mechanical displacement type micropumps and electromagnetic movement type micropumps, can be used. A mechanical displacement micropump is a pump that uses the movement of a solid or fluid, such as a gear or diagram, to create a pressure difference to induce the flow of fluid, and is called a diaphragm displacement pump or fluid displacement pump. ), rotary pump, etc. Electromagnetic micropumps are pumps that use energy in the form of electricity or magnetism directly to move fluid, and include electrohydrodynamic pumps (EHD), electroosmotic pumps, and magnetohydrodynamic pumps ( Magneto hydrodynamic pump, electro wetting pump, etc.

The pump 160 may be connected to the needle holder 140 through a tube (TU) and a connector (CN). The tube TU connected to the pump 160 is connected to the connector CN, which may be connected to the needle ND while supported on the needle holder 140. Accordingly, the chemical liquid discharged from the pump 160 is discharged through the needle ND through the tube TU and the connector CN. For this purpose, the needle holder 140 is coupled to the needle ND.

The needle holder 140 is disposed to face the button 120, and a spring 130 may be interposed between the needle holder 140 and the button 120. Button 120, spring 130, and needle holder 140 may be aligned along axis AX. The axis AX may be parallel to the Z axis of the drawing.

In the embodiment shown in FIG. 2, the chemical liquid storage unit 170 and the pump 160 are shown so that their schematic state can be known, and of course, they are not necessarily limited to the shape and/or arrangement shown in the drawing.

A sensor 183 is further located within the casing, and the sensor 183 may be provided to sense whether the needle holder 140 is adjacent to a needle through hole formed in the second casing 150. According to one embodiment, the sensor 183 may be provided to sense whether the needle holder 140 is in contact with the base of the second casing 150 in the second state in which the needle is discharged out of the cover.

According to an optional embodiment, the sensor 183 may include a first sensing member 183a located adjacent to the needle through hole and a second sensing member 183b coupled to the needle holder 140. The first sensing member 183a may be coupled to the second casing 150, and the first sensing member 183a and the second sensing member 183b may be positioned opposite to each other. The first sensing member 183a may be formed in the FPCB as shown in FIG. 2 and may be electrically connected to the controller 180 through this.

Figures 3 and 4 are a perspective view and a bottom perspective view, respectively, of the button 120 according to one embodiment.

The button 120 may be formed in a substantially cylindrical shape and may be rotatable along the rotation direction R1 about the axis AX. A rotation groove 122 is formed on the Z-axis direction surface 121 of the button 120 to facilitate the user's rotation of the button 120. The user can easily rotate the button 120 by inserting a fingernail or a coin into the rotation groove 122.

The button 120 may have a cylindrical side 123, and a ring member OR is inserted near the top of the side 123. This ring member (OR) can be an O-ring, which can prevent the risk of chemical leakage between the button 120 and the opening 111 of the first casing 110. Alternatively, the ring member OR may provide a predetermined resistance to the button 120 when the button 120 is pressed by the user, and/or may function to prevent the button 120 from easily popping out after being pressed. .

As can be seen in FIGS. 3 and 4, a fastening opening 127 may be formed in the side surface 123. At least one pair of fastening openings 127 may be provided in symmetrical portions of the side surface 123. The fastening opening 127 may be located at approximately the center of the side surface 123 in the Z-axis direction. Accordingly, a fastening base 123a may be formed at the edge of the fastening opening 127. The fastening opening 127 is fastened to a stopper, which will be described later, and at this time, the fastening base 123a is caught by the stopper, thereby preventing the button 120 from being released. This fastening opening 127 may be formed to extend in the X-Y plane direction along the outer peripheral surface of the side 123 so that the button 120 can rotate along the rotation direction R1 while fastened to the stopper.

A first groove 128a is formed in a portion of the side 123 adjacent to the fastening opening 127. The first grooves 128a provide a predetermined elasticity when the fastening openings 127 are fastened to the stopper, and may be located on both sides of each fastening opening 127.

A second groove 128b may be further formed on the side 123, and when the button 120 is combined with the needle holder 140, the connector CN passes through the second groove 128b on the side ( 123) can penetrate.

As can be seen in FIG. 4, a first coupling portion 125 may be provided on the inside of the button 120, for example, on the surface opposite to the needle holder 140. The first coupling portion 125 is provided to be coupled to the second coupling portion of the needle holder 140, which will be described later, and includes 1-1 coupling protrusions that protrude in the direction of the needle holder 140 and are spaced apart to face each other. It has a 1-2 coupling protrusion 125a and a 1-2 coupling protrusion 125b, and a gap 125c may be provided between the 1-1 coupling protrusion 125a and the 1-2 coupling protrusion 125b. The first coupling part 125 as described above does not necessarily have to be fixedly fastened to the second coupling part described later, and engages with the second coupling part as the user presses the button 120, and the user presses the button 120. ) can be of any shape as long as it can transmit the rotational force of the button 120 to the needle holder 140 when rotating.

Figures 5 and 6 are a perspective view and a bottom view, respectively, of the needle holder 140 according to one embodiment.

The needle holder 140 according to one embodiment has a body 141 that has a substantially disk shape to facilitate rotation along the rotation direction R1. As described above, the connector CN connected to the pump 160 may be coupled to the body 141.

Additionally, a needle ND is coupled to the body 141 in a direction opposite to the button 120. The needle ND is connected to the connector CN and ultimately communicates with the tube TU. As can be seen in FIG. 6, the needle ND may be located at the exact center of the bottom surface 149 of the body 141.

A support 145 may be erected in the Z-axis direction on the opposite side of the portion of the body 141 coupled to the connector CN. The support 145 may be formed in the circumferential direction along the edge of the body 141, and prevents the needle holder 140 from being tilted to one side due to the tension of the tube TU, and It can serve as a guide to enable linear movement along the insertion direction (K) of the needle (ND).

A second coupling portion 142 may be provided on the side of the body 141 facing the button 120.

The second coupling portion 142 is provided to be coupled to the above-described first coupling portion 125, and includes a 2-1 coupling protrusion 142a and a second coupling protrusion 142a that protrudes in the direction of the button 120 and are spaced apart from each other. -2 may have coupling protrusions (142b). The 2-1st engaging protrusion 142a and the 2-2 engaging protrusion 142b engage with the first engaging portion 125 as the user presses the button 120, and the user rotates the button 120. Any form may be used as long as the rotational force of the button 120 can be transmitted to the needle holder 140 when doing so. For example, when the first coupling portion 125 and the second coupling portion 142 are coupled to each other, the 1-1 coupling protrusion is between the 2-1 coupling protrusion 142a and the 2-2 coupling protrusion 142b. A gap 125c may be inserted between the protrusion 125a and the first-second coupling protrusion 125b. Accordingly, the first coupling portion 125 and the second coupling portion 142 can be engaged with each other.

Meanwhile, the spring 130 shown in FIG. 2 is fixed between the button 120 and the needle holder 140 by inserting a first coupling portion 125 at one end and a second coupling portion 142 at the other end. It can be. The spring 130 may be coupled between the button 120 and the needle holder 140 in a compressed state to some extent, but is not necessarily limited to this, and the button ( It may be interposed between the needle holder 120) and the needle holder 140 in a normal state rather than a compressed state.

The needle holder 140 may include a first support 146 and a guiding groove 144.

The first support 146 is supported by a guiding member 155 (see FIG. 10), which will be described later, in the first state before the needle holder 140 rotates to a certain degree from the base 151 of the second casing 150. Can be positioned spaced apart. That is, in the first state, the needle holder 140 may be floating to some extent in the Z-axis direction from the base 151.

The guiding groove 144 may be located adjacent to the first support 146. As can be seen in FIGS. 5 and 6, the guiding groove 144 is positioned adjacent to the first support 146. It may be located adjacent to the direction opposite to the rotation direction (R1). The guiding groove 144 may be formed in the body 141 in the form of a cut with a predetermined width, and the body 141 may be inserted in the needle (ND) insertion direction (K), for example, in the Z-axis direction of the drawing. It may be provided to penetrate. The guiding groove 144 is provided so that a guiding member 155 to be described later can pass through the second state in which the needle holder 140 is rotated. That is, in the second state, the guiding member 155 is inserted into the guiding groove 144, and at this time, the needle holder 140 is moved by the spring 130 along the needle ND insertion direction K. It can be slid.

The first support 146 as described above may include a support groove 146a formed in a groove shape with a predetermined depth in the Z-axis direction on the surface of the body 141 facing the insertion direction K. This support groove 146a may be provided to be connected to the guiding groove 144, and a support stopper 146b may be located between the support groove 146a and the guiding groove 144. The support stopper 146b may be provided in the shape of a protrusion protruding in a direction opposite to the direction in which the support groove 146a is formed. A guiding member to be described later is supported in the support groove 146a in the first state, and the support stopper 146b is used when the needle holder 140 is converted from the first state to the second state, that is, the needle holder ( When 140) rotates along the rotation direction R1, it can provide a certain degree of resistance to this rotation. Therefore, when the user rotates the button with a force greater than this resistance, the needle holder 140 rotates along the rotation direction (R1).

According to one embodiment, a second sensing member 183b may be installed in the needle holder 140. The second sensing member 183b may be located at the edge of the bottom surface 149 of the body 141. Accordingly, the needle holder 140 is driven toward the base of the second casing 150, and it is possible to sense whether the needle holder 140 is adjacent to the needle through hole. The second sensing member 183b is provided to come into contact with the first sensing member installed in the second casing 150 when the needle holder 140 is adjacent to the needle through hole, and protrudes to make contact with the first sensing member. can be formed.

The second sensing member 183b may be formed of a conductive material, but is not necessarily limited to this, and whether it is adjacent to the needle through hole of the needle holder 140 as it comes into contact with the first sensing member 183a It can be applied to anything that can sense. According to one embodiment, the second sensing member 183b does not necessarily need to be electrically connected to the controller 180 and may be in a grounded state.

FIG. 7 is a plan view of the second casing 150 according to an embodiment, and FIG. 8 is a partial perspective view showing a portion of the second casing 150.

The second casing 150 coupled to the first casing 110 may include a base 151. The base 151 may be a part of the second casing 150, and may be formed separately from the second casing 150 and coupled to the bottom of the second casing 150.

A needle through hole 153 may be formed in approximately the center of the base 151 to allow the needle to pass through.

A guide wall 152 having a substantially cylindrical shape may be formed around the needle through hole 153. The guide wall 152 may be provided to protrude in the Z-axis direction from the base 151 toward the first casing.

As seen in FIG. 7, the planar outer diameter of the guide wall 152 may be smaller than the inner diameter of the side 123 of the button 120. Accordingly, when the button 120 is pressed, the side 123 of the button 120 can be located outside the guide wall 152, and eventually the button 120 moves along the guide wall 152 to the needle holder 140. A linear sliding movement can be performed along the direction toward, that is, the needle insertion direction (K).

As can be seen in FIG. 8, a cut groove 152h may be formed in a portion of the guide wall 152 from the base 151 to the opposite end. The connector CN of the needle holder 140 may pass through the cut groove 152h.

A guiding member 155 may be provided on the inner surface of the guide wall 152. The guiding member 155 may be formed to extend along the needle insertion direction (K), for example, the Z-axis direction, and may be formed on a rail. This guiding member 155 is inserted into the guiding groove 144 in the above-described second state, and the needle holder 140 can slide in the insertion direction K along the guiding member 155.

At one end of the guiding member 155, that is, at the end of the guiding member 155 facing the first casing 110, a second support 154 is formed to support the first support in the above-described first state. It can be. As can be seen in FIG. 8, the second support 154 may include a 2-1 support part 154a and a 2-2 support part 154b. The 2-1 support part 154a and the 2-2 support part 154b may be connected to each other, and the 2-1 support part 154a is located downstream with respect to the rotation direction of the needle holder, The 2-2 support part 154b may be located upstream with respect to the rotation direction of the needle holder. At this time, since the 2-1 support part 154a is located closer to the button than the 2-2 support part 154b, when the needle holder 140 rotates along the rotation direction R1, this occurs. It can provide a certain degree of resistance to rotation. Therefore, when the user rotates the button with a force greater than this resistance, the needle holder 140 rotates along the rotation direction (R1).

A stopper 157 may be formed on the outer surface of the guide wall 152. The stopper 157 may be a protrusion protruding from the outer surface of the guide wall 152 in the there is.

The stopper 157 is provided to interrupt the sliding of the button 120 in the Z-axis direction and may include a first stopper 157a and a second stopper 157b spaced apart in parallel along the Z-axis direction. there is. The first stopper 157a and the second stopper 157b are inserted into the fastening opening 127 of the button 120 shown in FIGS. 3 and 4, and the fastening stand 123a is connected to the first stopper 157a. And it is hung on the second stopper 157b to prevent the button 120 from being separated in the direction opposite to the insertion direction (K). The first stopper 157a is fastened to the fastening opening 127 before the button 120 is pressed, and the second stopper 157b is fastened to the fastening opening 127 while the button 120 is pressed. .

Optionally, according to one embodiment, a first sensing member 183a may be further installed in the second casing 150. The first sensing member 183a may be installed on the FPCB, and the FPCB may be coupled to the base of the second casing 150. The first sensing member 183a may be electrically connected to the controller 180 through the FPCB. In the drawing, the controller 180 is shown as being installed on the same FPCB as the first sensing member 183a, but the present invention is not necessarily limited thereto, and may be installed on a circuit board separate from the FPCB on which the first sensing member 183a is installed. Of course, they can be installed and electrically connected to each other.

The first sensing member 183a may be located adjacent to the needle through hole 153, and may extend to the inside of the guide wall 152 for this purpose. That is, it extends to the inside of the guide wall 152 through a cut in the guide wall 152 formed to allow the connector CN to pass through and is located adjacent to the needle through hole 153.

Figure 9 is a schematic configuration diagram of the sensor 183 and the controller 180 according to an embodiment.

As described above, the sensor 183 according to one embodiment is provided to sense whether the needle holder 140 is adjacent to the needle through hole 153, and may be electrically connected to the controller 180.

As described above, the controller 180 is electrically connected to the pump and not only controls the injection of the chemical solution through the needle, but also determines whether the needle holder is adjacent to the needle through hole 153 through the sensor 1830. You can.

According to one embodiment, the controller 180 may include a first processor 181 and a second processor 182. The first processor 181 controls the pump and can control the injection of the chemical solution through the needle. The second processor 182 determines whether the needle holder is adjacent to the needle through-hole 153 through the sensor 183, and operates the first processor 181 only when the needle holder is adjacent to the needle through-hole. Ensure that the chemical solution is injected through the device. Therefore, if the needle holder 140 is not adjacent to the needle through hole 153, injection may not occur even if the user performs a drug injection operation.

That the needle holder 140 is adjacent to the needle through hole 153 means that the needle has been sufficiently discharged to the outside of the second casing, which may ultimately mean that the needle has been inserted into the patient's body. Therefore, when the second processor 182 senses that the needle holder 140 is adjacent to the needle through hole 153, it determines that the needle has been sufficiently inserted into the patient's body, and injection of the medical solution by the first processor 181 is possible. It is to be done. Accordingly, it is possible to prevent the drug injection from starting when the needle is not sufficiently inserted into the patient, which can prevent problems such as the drug leaking out or the drug not being injected into the target area.

The first processor 181 and the second processor 182 do not have to be provided as separate components, and may be a processor and/or a storage medium that stores and/or executes one program, and may be a single processor and /Or it may be a partitioned area for executing a separate area of the program in the storage medium.

According to another embodiment, the controller 180 may further include a notification element 184.

The notification element 184 is electrically connected to the sensor 183 and may be provided to generate a notification when the needle holder 140 is adjacent to the needle through hole 153. The notification element 184 may include a light-emitting element that can display a notification signal with light. And/or the notification element 184 may include a micro speaker element that can display the notification signal as a sound. And/or the notification element 184 may include a display element that can display a notification as a screen display.

In FIG. 9, the notification element 184 is shown as being included in the controller 180, but it is not necessarily limited thereto and may be comprised of a separate component.

The notification element 184 is not only electrically connected to the sensor 183, but also may be electrically connected to the first processor 181 and/or the second processor 182, so that only sensing by the sensor 183 is possible. In addition, notifications can be provided to the user for other operating states.

The chemical injection device 100 according to an embodiment configured as described above allows the user to press the button 120 while positioning the outer surface of the second casing 150 at the area where the chemical injection device 100 will be used. By pressing, the button 120 and the needle holder 140 are coupled to each other, and when the user rotates the button 120, the needle holder 140 is moved in the needle ND insertion direction K by the elasticity of the spring 130. It slides to enable instantaneous insertion of the needle (ND). At this time, as the button 120 is pressed, the spring 130 may be sufficiently compressed, and the instantaneous insertion effect of the needle ND using the elasticity of the spring 130 may be increased. Due to the instantaneous insertion of the needle (ND), the patient's pain and fear can be minimized. At this time, by sensing whether the needle holder 140 is adjacent to the needle through hole 153, that is, whether the needle holder 140 is in contact with the part of the second casing 150 around the needle through hole 153, the needle It is possible to easily determine whether (ND) has been sufficiently discharged through the needle through hole 153, and thus the user can inject the chemical solution at the correct timing without loss of the chemical solution, and the user can avoid needle insertion due to fear of needle insertion. It can reduce concerns that may lead to hesitation about insertion.

According to one embodiment, for example, as can be seen in FIG. 10A, in the first state in which the needle holder 140 is not rotated, the needle holder 140 is spaced apart from the base 151 of the second casing 150. . In this state, the needle is before being inserted into the patient's body. In this first state, the first support 146 of the needle holder 140 may be in contact with the second support 154 of the guiding member 155 and support each other. At this time, according to one embodiment, the first support 146 and the second support 154 have a structure that engages with each other, and accordingly, the support groove 146a and the 2-1 support portion 154a contact each other, The support stopper 146b and the 2-2 support portion 154b are provided to contact each other. Accordingly, in the first state, the needle holder 140 can be maintained more stably supported at the end of the guiding member 155.

When the user rotates the button 120 and the needle holder 140 rotates along the rotation direction R1, the support stopper 146b and the 2-1 support portion 154a move relative to each other in a misaligned direction. Resistance to rotation can be provided to the needle holder 140. If a rotational force exceeding the resistance force is applied to the needle holder 140 by the user turning the button 120 with a force exceeding this resistance force, the support stopper 146b passes over the 2-1 support portion 154a. Then, the guiding member 155 can enter the guiding groove 144.

The guiding groove 144 and the guiding member 155 each have a first width W1 and a second width W2 in the X-axis direction. The first width W1 may exceed the second width W2 so that the guiding member 155 can be smoothly inserted into the guiding groove 144.

When the user rotates the button 120 and the needle holder 140 enters the second state in a fully rotated state, as can be seen in FIG. 10B, the needle holder 140 has a guiding member in the guiding groove 144. In the state in which (155) is inserted, the needle holder 140 is driven toward the base 151 of the second casing 150 by sliding along the guiding member 155, and accordingly, the needle ND is positioned on the patient's body. It is inserted into .

The present invention allows the needle holder to be driven toward the base by instantaneously releasing the compressed force of the spring, thereby enabling the needle coupled to the needle holder to be instantaneously inserted into the patient's body.

The chemical injection device according to the above embodiment includes a first support 146 of the needle holder and a guiding member ( 155), the second support 154 is provided, but the present invention is not necessarily limited thereto. In other words, it is not necessary to provide resistance to the rotation of the needle holder, and if the needle holder slides quickly using the elastic force of the spring according to the rotation of the needle holder by the user, and the needle can be instantly inserted into the patient's body, this can be done. It may be said that it can be included in the scope of invention rights.

The chemical injection device according to another embodiment may further include a needle cover assembly to protect the needle before use by the user.

Figure 11 is a perspective view of the needle cover assembly 190 according to one embodiment.

The needle cover assembly 190 may include a cover plate 191, which may be provided as a flat plate, and one end of which becomes a handle 191a so that the user can use the handle 191a. The needle cover assembly 190 can be separated from the casing.

The needle cover assembly 190 may include a needle cover 192, and the needle cover 192 may be inserted into the needle through hole 153 provided in the base 151 of the second casing 150. . Although not shown in the drawing, the needle cover 192 may include a closed space, and the tip of the needle may be partially inserted into this closed space. The closed space may include a part formed of a material that allows air to pass through but not liquid, or a part capable of changing volume. Accordingly, the user may perform priming (priming) to remove the air inside the needle and/or inside the tube before use. It is possible to prevent chemicals from being discharged to the outside during priming) work.

The present invention has been described with reference to an embodiment shown in the attached drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. You will be able to. Therefore, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (4)

Casing with needle through hole;
a button exposed to the outside of the casing;
a needle holder located within the casing opposite to the needle through-hole, spaced apart from the needle through-hole in a first state, and positioned adjacent to the needle through-hole in a second state;
a spring located in the casing, coupled to the needle holder, and provided to provide an elastic force to the needle holder according to the operation of the button so that the needle holder faces the needle through hole;
a sensor located within the casing and provided to sense whether the needle holder is adjacent to the needle through hole; and
A controller electrically connected to the sensor and configured to determine whether the needle holder is adjacent to the needle through hole in the second state,
The sensor is,
a first sensing member located adjacent to the needle through hole within the casing; and
It includes a second sensing member coupled to the needle holder and positioned opposite to the first sensing member,
The second sensing member is provided to contact the first sensing member by the elastic force of the spring,
The controller is provided to determine whether the first sensing member and the second sensing member are in contact with each other in the second state,
The casing includes a first casing exposing the button to the outside, and a second casing coupled to the first casing and having a base in which the needle through hole is formed,
The first sensing member is installed on the FPCB located on the base,
It further includes a cylindrical guide wall located between the first casing and the second casing and protruding in a direction perpendicular to the base around the needle through hole,
The needle holder slides inside the guide wall by the spring elasticity,
The first sensing member is located between the inside of the guide wall and the needle through hole, and the second sensing member is located on the surface of the needle holder facing the base from the inside of the guide wall,
The first sensing member is installed in a portion of the FPCB extending inwardly of the guide wall. According to paragraph 1,
The drug injection device further includes a notification element electrically connected to the sensor and provided to generate a notification when the needle holder is adjacent to the needle through hole. According to paragraph 1,
The controller is,
a first processor provided to control injection of the chemical solution through the needle; and
A second processor configured to determine whether the needle holder is adjacent to the needle through-hole through the sensor and, if the needle holder is adjacent to the needle through-hole, perform injection of the chemical solution through the first processor. A chemical injection device comprising a. According to any one of claims 1 to 3,
A guiding member located within the casing and supporting the needle holder.