Patent Description:
Generally, a syringe includes a cylindrical cylinder having a space formed therein to store an injection solution, a piston moved to absorb or discharge the injection solution from inside the cylinder, a needle holder coupled to a front portion of the cylinder, and a needle coupled to the needle holder.

Meanwhile, securing safety of an injection needle is extremely important. In order to reduce the risk of needlestick injuries that can be fatal in some cases and to prevent reuse of a syringe by a person who misuses a drug so that the probability of drug misuse and the spread of contagious diseases are suppressed, a need has arisen for a disposable syringe and a disposable intravenous infusion set that prevent reuse thereof.

These are also necessary to allow healthcare workers, such as doctors and nurses who provide professional care to patients, to avoid becoming patients themselves due to secondary infection caused by an accidental needlestick injury.

Accordingly, safety syringes that can prevent hospital-acquired infection of healthcare workers have been in use. Documents <CIT>, <CIT> and <CIT> disclose examples of prior art syringe safety caps.

The present disclosure is directed to providing a syringe safety cap and a safety syringe including the same that are capable of safely protecting an injection needle to prevent needlestick injuries and are capable of easy operation.

One aspect of the present disclosure provides a syringe safety cap as defined in claim <NUM>.

Another aspect of the present disclosure provides a safety syringe including a cylinder configured to accommodate a medicinal fluid therein, an injection needle provided at one end portion of the cylinder, and the syringe safety cap coupled to the cylinder and provided to selectively cover the injection needle.

A syringe safety cap and a safety syringe including the same relating to at least one embodiment of the present disclosure have the following advantageous effects.

A safety cover portion and a link portion can automatically rotate due to an elastic force provided by a first elastic portion and a second elastic portion just by a simple operation of uncoupling the safety cover portion and a fixing protrusion of a base portion, and the safety cover portion can surround and protect an injection needle.

Hereinafter, a syringe safety cap and a safety syringe including the same according to an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

The present disclosure will be described below with reference to the accompanying drawings. However, the present disclosure may be implemented in various different forms and thus is not limited to the embodiments described herein. Also, parts unrelated to the description have been omitted from the drawings to clearly describe the present disclosure, and like elements are denoted by like reference numerals throughout the specification.

Throughout the specification, when a certain portion is described as being "connected to (linked to, in contact with, coupled to)" another portion, this not only includes a case in which the portion is "directly connected" to the other portion but also includes a case in which the portion is "indirectly connected" to the other portion while another constituent member is disposed therebetween.

<FIG> is a perspective view illustrating a safety syringe including a syringe safety cap according to an embodiment of the present disclosure, <FIG> is a perspective view illustrating the syringe safety cap according to an embodiment of the present disclosure, and <FIG> is an exploded perspective view illustrating the syringe safety cap according to an embodiment of the present disclosure.

Also, <FIG> is a lateral view of the syringe safety cap according to an embodiment of the present disclosure, <FIG> is a perspective view of a main portion for describing a coupler of a safety cover portion according to another embodiment, and <FIG> is a lateral view for describing an operational state of the syringe safety cap according to an embodiment of the present disclosure.

As illustrated in <FIG>, a safety syringe (also abbreviated as "syringe") may include a cylinder <NUM>, an injection needle <NUM>, and a syringe safety cap <NUM>.

The cylinder <NUM> may form a main body of the safety syringe and accommodate a medicinal fluid or accommodate different medicines or liquid medicines therein. When two or more types of medicines or liquid medicines are accommodated in the cylinder <NUM>, at least two or more rubber stoppers may be arranged inside the cylinder <NUM>, and different medicines or liquid medicines may be accommodated in separate accommodation spaces in the cylinder that are isolated by the stoppers.

The injection needle <NUM> may be provided at one end portion of the cylinder <NUM>. Here, a needle holder <NUM> may be further provided at the one end portion of the cylinder <NUM>, and the injection needle <NUM> may be coupled to the needle holder <NUM>. That is, the injection needle <NUM> may be fixed to the needle holder <NUM>, and the needle holder <NUM> may be mounted on the cylinder <NUM>.

Also, a plunger rod may be coupled to the other end portion of the cylinder. A user may press the plunger rod toward the injection needle <NUM> to discharge a medicinal fluid, which is in the accommodation space in the cylinder, to the outside through the injection needle <NUM>.

Also, the syringe safety cap <NUM> may be coupled to the cylinder <NUM>. For example, the syringe safety cap <NUM> may be coupled to the one end portion of the cylinder that is adjacent to the injection needle <NUM>. The syringe safety cap <NUM> may selectively cover the injection needle <NUM> and, in this way, prevent a needlestick injury caused by the injection needle <NUM>. For example, the syringe safety cap <NUM> may also be fitted and coupled to the cylinder <NUM> or heat-bonded to the cylinder <NUM>.

Also, the syringe safety cap <NUM> relating to an embodiment (first embodiment) of the present disclosure may include a base portion <NUM>, a link portion <NUM>, a first elastic portion <NUM>, a safety cover portion <NUM>, and a second elastic portion <NUM>.

Specifically, the syringe safety cap <NUM> includes the base portion <NUM> having a mounting portion to be mounted on the cylinder <NUM> of the syringe, the link portion <NUM> rotatably connected to the base portion <NUM>, and the first elastic portion <NUM> configured to provide a rotational force so that the link portion <NUM> rotates with respect to the base portion <NUM>.

Also, the syringe safety cap <NUM> includes the safety cover portion <NUM> rotatably connected to the link portion <NUM>, detachably fixed to the base portion <NUM>, and configured to, when detached from the base portion <NUM> and rotating, surround the injection needle <NUM> of the syringe, and the second elastic portion <NUM> configured to provide a rotational force so that the safety cover portion <NUM> rotates with respect to the link portion <NUM>.

First, the base portion <NUM> may be coupled to the one end portion of the cylinder <NUM> having a medicinal fluid accommodated therein.

Also, the link portion <NUM> may be axially coupled (or connected) to the base portion <NUM>. In the present document, being "axially coupled (or connected)" refers to being coupled (connected) to be rotatable about a predetermined axis of rotation. For example, the syringe safety cap may have a first axial portion configured to provide a center of rotation of the link portion <NUM> with respect to the base portion <NUM>. Also, the first axial portion may include the first elastic portion <NUM> described above.

Here, the first axial portion may include a first rotating shaft <NUM> and a first coupling hole <NUM> mounted to allow rotation of the first rotating shaft <NUM>. Specifically, the link portion <NUM> may include any one of the first rotating shaft <NUM> and the first coupling hole <NUM> constituting the first axial portion, and the base portion <NUM> may include the other one of the first rotating shaft <NUM> and the first coupling hole <NUM> constituting the first axial portion. For example, referring to <FIG>, the link portion <NUM> may include the first rotating shaft <NUM> and the base portion <NUM> may include the first coupling hole <NUM>, but the present disclosure is not limited thereto, and the opposite is also possible.

Also, the safety cover portion <NUM> may be axially coupled (or connected) to the link portion <NUM>. The syringe safety cap may have a second axial portion configured to provide a center of rotation of the safety cover portion <NUM> with respect to the link portion <NUM>. Also, the second axial portion may include the second elastic portion <NUM> described above.

Here, the second axial portion may include a second rotating shaft <NUM> and a second coupling hole <NUM> mounted to allow rotation of the second rotating shaft <NUM>. Specifically, the link portion <NUM> may include any one of the second rotating shaft <NUM> and the second coupling hole <NUM> constituting the second axial portion, and the safety cover portion <NUM> may include the other one of the second rotating shaft <NUM> and the second coupling hole <NUM> constituting the second axial portion. For example, referring to <FIG>, the safety cover portion <NUM> may include the second rotating shaft <NUM> and the link portion <NUM> may include the second coupling hole <NUM>, but the present disclosure is not limited thereto, and the opposite is also possible.

Also, the injection needle <NUM> of the syringe may be located between the first axial portion, which provides the center of rotation of the link portion <NUM> with respect to the base portion <NUM>, and the second axial portion, which provides the center of rotation of the safety cover portion with respect to the link portion <NUM>. That is, the injection needle <NUM> may be located between the first axial portion and the second axial portion.

For example, the first axial portion may be located at one end portion of the link portion <NUM>, and the second axial portion may be located at the other end portion thereof. Also, in a state in which the safety cover portion <NUM> is fixed to the base portion <NUM>, the link portion <NUM> may be disposed to surround a partial area of the cylinder <NUM>. Also, in a process in which the safety cover portion <NUM> is detached from the base portion <NUM> and surrounds the injection needle <NUM>, the safety cover portion <NUM> may break away from the cylinder <NUM> of the syringe.

Meanwhile, in the process in which the safety cover portion <NUM> surrounds the injection needle, the second axial portion may be moved to approach the injection needle <NUM> of the syringe. Unlike this, the first axial portion may be provided so that a change in the position thereof does not occur in the process in which the safety cover portion <NUM> surrounds the injection needle.

Also, the first axial portion, which provides the center of rotation of the link portion <NUM> with respect to the base portion <NUM>, and the second axial portion, which provides the center of rotation of the safety cover portion <NUM> with respect to the link portion <NUM>, may be arranged to be parallel. Meanwhile, the first axial portion and the second axial portion may each be provided so that the axis of the center of rotation thereof is perpendicular to a direction of a central axis C of the cylinder. In the present document, the reference sign "C" indicates the central axis of the cylinder, and the central axis of the cylinder may be coaxial with the injection needle <NUM>.

Also, in the process in which the safety cover portion <NUM> surrounds the injection needle <NUM>, a direction of rotation of the link portion <NUM> with respect to the base portion <NUM> and a direction of rotation of the safety cover portion <NUM> with respect to the link portion <NUM> may be provided to be the same. That is, in the process in which the safety cover portion <NUM> surrounds the injection needle <NUM>, rotation about the first axial portion and rotation about the second axial portion may be performed in the same direction (for example, a first direction of rotation).

Also, in the process in which the safety cover portion <NUM> is detached (or uncoupled) from the base portion <NUM> and surrounds the injection needle <NUM>, an angle of rotation of the link portion <NUM> with respect to the base portion <NUM> may be provided to be smaller than an angle of rotation of the safety cover portion <NUM> with respect to the link portion <NUM>. That is, the safety cover portion <NUM> may rotate about a larger angle as compared to rotation of the link portion <NUM> with respect to the base portion <NUM>.

Also, the first elastic portion <NUM> interposed in the first axial portion and the second elastic portion <NUM> interposed in the second axial portion may each include a spring (for example, a torsion spring).

As described above, referring to <FIG>, the link portion <NUM> may have one end portion rotatably coupled to the base portion <NUM> through the first rotating shaft <NUM>, and when the link portion <NUM> rotates in a first direction of rotation R1 (see <FIG>) about the first rotating shaft <NUM>, the link portion <NUM> may be moved to an outer side of the one end portion of the cylinder <NUM>.

The first elastic portion <NUM> may be mounted on the first rotating shaft <NUM> and may provide an elastic force so that the link portion <NUM> rotates in the first direction of rotation R1 (see <FIG>).

Also, the safety cover portion <NUM> may have one end portion rotatably coupled to the link portion <NUM> through the second rotating shaft <NUM> and may rotate in the first direction of rotation R1 (see <FIG>) about the second rotating shaft <NUM> and cover the injection needle <NUM>. That is, the first direction of rotation R1 may be a direction in which the safety cover portion <NUM> is uncoupled from the base portion <NUM> and in which the link portion <NUM> and the safety cover portion <NUM> are unfolded.

Also, the second elastic portion <NUM> may be mounted on the second rotating shaft <NUM> and may provide an elastic force so that the safety cover portion <NUM> rotates in the first direction of rotation R1 (see <FIG>).

Therefore, in a state in which the safety cover portion <NUM> is coupled to the base portion <NUM>, when a force is applied from the outside to uncouple the safety cover portion <NUM> and the base portion <NUM>, the safety cover portion <NUM> rotates in the first direction of rotation R1 (see <FIG>) due to the elastic force generated by the second elastic portion <NUM>, and simultaneously, the link portion <NUM> rotates in the first direction of rotation R1 (see <FIG>) due to the elastic force generated by the first elastic portion <NUM>.

That is, just by one operation in which a user uncouples the safety cover portion <NUM> and the base portion <NUM>, the safety cover portion <NUM> may be operated to cover the injection needle <NUM>, and in this way, the safety cover portion <NUM> may protect the injection needle <NUM> and prevent a needlestick injury.

Referring to <FIG>, the base portion <NUM> may have a coupling ring <NUM>, a first extension bar <NUM>, and a fixing protrusion <NUM>. The base portion <NUM> may be made of, for example, a resin material.

The base portion <NUM> may include the coupling ring <NUM> configured to provide a mounting portion coupled while surrounding an outer circumferential surface of the cylinder of the syringe in a circumferential direction, the first extension bar <NUM> connected to the coupling ring <NUM>, formed to extend in a longitudinal direction (or a direction of a central axis) of the cylinder <NUM> of the syringe, and having any one of the first rotating shaft and the first coupling hole, which constitute the first axial portion, formed therein, and the fixing protrusion <NUM> provided on the coupling ring <NUM> and provided to be detachably coupled to the safety cover portion <NUM>.

Specifically, the coupling ring <NUM> may be coupled while surrounding the outer circumferential surface of the one end portion of the cylinder <NUM> in the circumferential direction.

Also, the first extension bar <NUM> may be connected to the coupling ring <NUM> and formed to extend toward the one end portion of the cylinder <NUM>. Also, the first extension bar <NUM> may be provided as a pair of first extension bars <NUM> located to be spaced apart at a predetermined interval. Also, a pair of first coupling holes <NUM> may be formed to be symmetrical to each other in the first extension bars <NUM>.

Meanwhile, the fixing protrusion <NUM> may have a column <NUM> and a stopper <NUM>.

The column <NUM> may be formed to protrude from the coupling ring <NUM> in a radial direction of the cylinder <NUM> of the syringe. The column <NUM> may have a first diameter D1.

The stopper <NUM> may be formed on an upper end portion of the column <NUM> and have a second diameter D2. The second diameter D2 may be larger than the first diameter D1.

Also, the link portion <NUM> may have a link body <NUM> and a second extension bar <NUM>. The link portion <NUM> may be made of, for example, a resin material.

Also, the link portion <NUM> may include the link body <NUM>, which is formed to surround the outer circumferential surface of the cylinder <NUM> of the syringe in a state in which the safety cover portion <NUM> is fixed to the base portion <NUM> and which has one of the second rotating shaft <NUM> and the second coupling hole <NUM> which constitute the second axial portion, and the second extension bar, which is connected to the link body <NUM> and has the other one of the first rotating shaft <NUM> and the first coupling hole <NUM> which constitute the first axial portion.

<FIG> illustrates an embodiment in which the second coupling hole <NUM> is provided in the link body <NUM> and the first rotating shaft <NUM> is provided on the second extension bar.

Referring to <FIG> and <FIG>, the link body <NUM> may be formed to surround an outer circumferential surface of a stepped portion <NUM> formed on the one end portion of the cylinder <NUM>.

Also, both end portions of the link body <NUM> may be formed to be spaced apart from each other and formed to extend to an outer side of the cylinder <NUM>. Referring to <FIG>, a pair of second coupling holes <NUM> may be formed in both end portions of the link body <NUM>.

The second extension bar <NUM> may be connected to the link body <NUM> and extend in a direction perpendicular to the longitudinal direction of the cylinder <NUM>.

A pair of second extension bars <NUM> may be formed to be spaced apart at a predetermined interval, and referring to <FIG>, the first rotating shaft <NUM> may be formed on one end portion of the second extension bar <NUM>.

Also, the first extension bar <NUM> of the base portion <NUM> may be inserted between the second extension bars <NUM>, and the first rotating shaft <NUM> may be coupled to the first coupling hole <NUM>. As a result, the link portion <NUM> may rotate about the first rotating shaft <NUM>.

The first rotating shaft <NUM> may be formed to be perpendicular to the longitudinal direction (or the direction of the central axis) of the cylinder <NUM>.

The first elastic portion <NUM> may be coupled to the first shaft <NUM>. For example, the first elastic portion <NUM> may be a coil spring or a torsion spring and may provide an elastic force so that the link portion <NUM> rotates in the first direction of rotation R1 (see <FIG>) about the first rotating shaft <NUM>.

Here, when the link portion <NUM> rotates in the first direction of rotation R1 (see <FIG>) about the first rotating shaft <NUM>, the link body <NUM> may be moved to an outer side of one end portion of the base portion <NUM>. Also, when the link portion <NUM> rotates in a second direction of rotation, which is the opposite direction of the first direction of rotation R1 (see <FIG>) about the first rotating shaft <NUM>, the link body <NUM> may be located on the stepped portion <NUM> formed on the one end portion of the cylinder <NUM>, and the stepped portion <NUM> may be located at an inner side of the link body <NUM>. The second direction of rotation may be a direction in which the link portion <NUM> and the safety cover portion <NUM> are folded so that the safety cover portion <NUM> is fixed to the base portion <NUM>.

Meanwhile, the safety cover portion <NUM> may include a cover body <NUM> in which the injection needle <NUM> of the syringe is accommodated and the other one of the second rotating shaft <NUM> and the second coupling hole <NUM> which constitute the second axial portion is provided (in the embodiment illustrated in <FIG>, the second rotating shaft is provided). Also, the cover body <NUM> of the safety cover portion <NUM> may have a coupling slit <NUM> formed to extend through the cover body <NUM> in a longitudinal direction thereof to be coupled to the fixing protrusion <NUM>. The safety cover portion <NUM> may be made of, for example, a resin material.

The cover body <NUM> may be concavely formed so that the injection needle <NUM> is accommodated therein, and the second rotating shaft <NUM> may be provided on one end portion of the cover body <NUM>. The second rotating shaft <NUM> may be provided as a pair of second rotating shafts <NUM> symmetrical to each other. Also, the cover body <NUM> may have a flat shape instead of being inclined in the longitudinal direction thereof.

Referring to the embodiment illustrated in <FIG>, the second rotating shaft <NUM> may be coupled to the second coupling hole <NUM> of the link portion <NUM>. The second rotating shaft <NUM> may be formed to be perpendicular to the longitudinal direction (or the direction of the central axis) of the cylinder <NUM>.

The coupling slit <NUM> may be formed to pass through the center of the cover body <NUM> and formed to extend in the longitudinal direction of the cover body <NUM>.

When rotation of the safety cover portion <NUM> in the second direction of rotation, which is the opposite direction of the first direction of rotation, is completed and the cover body <NUM> is pressed against the coupling ring <NUM>, the fixing protrusion <NUM> may be inserted into and coupled to the coupling slit <NUM>.

A width W of at least a partial area of the coupling slit <NUM> may be formed to be smaller than the first diameter D1 of the column <NUM> of the fixing protrusion <NUM>. Preferably, the width W of at least a partial area of the coupling slit <NUM> may be formed to be slightly smaller than the first diameter D1.

Also, the coupling slit <NUM> may have a first insertion groove <NUM> and a second insertion groove <NUM>.

The first insertion groove <NUM> may be formed in one end portion of the coupling slit <NUM>. The first insertion groove <NUM> may be formed to have a third diameter D3, which is larger than the second diameter D2 of the stopper <NUM> of the base portion <NUM>, so that the stopper <NUM> is insertable into the first insertion groove <NUM>. Therefore, the stopper <NUM> may be inserted into the first insertion groove <NUM>.

Also, the second insertion groove <NUM> may be formed in a central portion of the coupling slit <NUM>. The second insertion groove <NUM> may be formed to have a fourth diameter D4 which is larger than the first diameter D1 of the column <NUM> and smaller than the second diameter D2 of the stopper <NUM>.

Accordingly, when the safety cover portion <NUM> moves along the cylinder <NUM> (for example, moves toward the other end portion thereof) in a state in which the stopper <NUM> of the fixing protrusion <NUM> is inserted into the first insertion groove <NUM>, the column <NUM> may be moved along the coupling slit <NUM> and inserted into the second insertion groove <NUM>.

Here, although the width W of at least a partial area of the coupling slit <NUM> is smaller than the first diameter D1 of the column <NUM>, as the coupling slit <NUM> widens due to the column <NUM> when the safety cover portion <NUM> moves toward the other end portion of the cylinder <NUM>, the column <NUM> may be inserted into the second insertion groove <NUM>. The column <NUM> inserted into the second insertion groove <NUM> may be fixed to the second insertion groove <NUM> unless a separate external force is applied thereto.

Then, when an external force is applied to the safety cover portion <NUM> causing the safety cover portion <NUM> to move toward the one end portion of the cylinder <NUM>, the column <NUM> may be moved to the first insertion groove <NUM> along the coupling slit <NUM>, and when the safety cover portion <NUM> rotates in the first direction of rotation R1 about the second rotating shaft <NUM>, the stopper <NUM> may exit the first insertion groove <NUM>, and the safety cover portion <NUM> and the fixing protrusion <NUM> are uncoupled.

The second elastic portion <NUM> may be coupled to the second shaft <NUM>. The second elastic portion <NUM> may be a coil spring or a torsion spring and may provide an elastic force so that the safety cover portion <NUM> rotates in the first direction of rotation R1 (see <FIG>) about the second rotating shaft <NUM>.

When the safety cover portion <NUM> rotates in the first direction of rotation R1 (see <FIG>) about the second rotating shaft <NUM>, as the safety cover portion <NUM> rotates toward the injection needle <NUM>, the injection needle <NUM> may be accommodated in the cover body <NUM>.

The cover body <NUM> may have a wing portion 451a formed at both side edges in the longitudinal direction to sufficiently cover the injection needle <NUM> when rotation of the cover body <NUM> is completed. Referring to <FIG>, the wing portion 451a may be provided to, in a state in which the cover body <NUM> is fixed to the base portion <NUM>, further protrude in the radial direction of the cylinder with respect to a virtual line segment L that is parallel to the central axis C of the cylinder.

The safety cover portion <NUM> may have a coupler <NUM> into which a partial area of the injection needle <NUM> is inserted when rotation of the safety cover portion <NUM> is completed and the safety cover portion <NUM> surrounds the injection needle <NUM>. Also, one end portion of the coupler <NUM> may be formed to be spaced apart from an inner circumferential surface of the cover body <NUM>. Accordingly, a separation portion 457a may be formed between the one end portion of the coupler <NUM> and the inner circumferential surface of the cover body <NUM>.

When rotation of the cover body <NUM> in the first direction of rotation R1 about the second rotating shaft <NUM> is completed and the cover body <NUM> covers the injection needle <NUM>, the injection needle <NUM> may be accommodated in the cover body <NUM>, and one end portion of the injection needle <NUM> may be inserted into the coupler <NUM> through the separation portion 457a and coupled to the coupler <NUM>.

Referring to <FIG>, the coupler may include a first protruding portion <NUM> and a second protruding portion <NUM> that are located to be spaced apart to form an accommodation space S for the injection needle <NUM>. Here, the coupler is provided to allow the injection needle <NUM> to be inserted into the space between the first protruding portion <NUM> and the second protruding portion <NUM>, and a catching protrusion 458a configured to prevent the injection needle <NUM> from breaking away is provided on the first protruding portion <NUM>. Of course, a predetermined space is provided between the catching protrusion 458a and the second protruding portion <NUM>, and the space is formed to have a width narrower than that of the accommodation space S. Also, an inclined surface may be provided on an inlet side of the injection needle <NUM> on each of the catching protrusion 458a and the second protruding portion <NUM>.

Hereinafter, an operation of the syringe safety cap will be described.

<FIG> are exemplary views illustrating operation examples of the syringe safety cap according to an embodiment of the present disclosure.

First, as illustrated in <FIG>, before the syringe is used, the injection needle <NUM> may be covered with a needle cap <NUM>.

The syringe safety cap <NUM> may not interfere with the needle cap <NUM> being coupled to the one end portion of the cylinder <NUM>.

In a state in which the needle cap <NUM> is coupled, the link portion <NUM> of the syringe safety cap <NUM> may be in a state of, after rotation thereof in the second direction of rotation is completed, being located to surround the outer circumferential surface of the stepped portion <NUM> of the cylinder <NUM>, and the safety cover portion <NUM> may also be in a state of, after rotation thereof in the second direction of rotation is completed, being coupled and bound to the fixing protrusion <NUM> of the base portion <NUM>. Accordingly, the safety cover portion <NUM> and the link portion <NUM> may be fixed so as not to be rotated in the first direction of rotation R1.

Also, as illustrated in <FIG>, the needle cap <NUM> may be removed before using the syringe. A user may lightly push up the needle cap <NUM> to remove the needle cap <NUM>. After removing the needle cap <NUM>, the user may give an injection to a patient or the like.

Meanwhile, in a state in which use of the syringe is completed, the column <NUM> of the fixing protrusion <NUM> may be in a state of being inserted into the second insertion groove <NUM>. In this state, when the user pushes the safety cover portion <NUM> upward as illustrated in <FIG>, as illustrated in <FIG>, the column <NUM> of the fixing protrusion <NUM> is moved along the coupling slit <NUM> and moved to the first insertion groove <NUM>, and the link portion <NUM> rotates in the first direction of rotation R1 about the first rotating shaft <NUM>.

Then, in this state, when the user lifts the safety cover portion <NUM> and the stopper <NUM> exits the first insertion groove <NUM>, the safety cover portion <NUM> rotates in the first direction of rotation R1 due to the elastic force provided by the second elastic portion <NUM>. Also, simultaneously, the link portion <NUM> rotates in the first direction of rotation R1 due to the elastic force provided by the first elastic portion <NUM>.

Then, as illustrated in <FIG>, the link body <NUM> of the link portion <NUM> may be moved to the outer side of the stepped portion <NUM> about the first rotating shaft <NUM>, and the second rotating shaft <NUM> may be moved to an upper side of the cylinder <NUM>. Also, the safety cover portion <NUM> may rotate about the second rotating shaft <NUM>, and an upper end portion of the safety cover portion <NUM> may be moved to the upper side of the cylinder <NUM>.

That is, the safety cover portion <NUM> and the link portion <NUM> may be unfolded due to moving to the upper side of the cylinder <NUM>, and the injection needle <NUM> may be accommodated in the cover body <NUM>.

Also, one end portion of the injection needle <NUM> may be inserted and coupled to the coupler <NUM> of the safety cover portion <NUM>, and in this way, unintentional separation between the safety cover portion <NUM> and the injection needle <NUM> may be prevented.

In this way, according to the present disclosure, just by a simple operation of releasing a coupling force between the fixing protrusion <NUM> and the safety cover portion <NUM>, the safety cover portion <NUM> and the link portion <NUM> may simultaneously and automatically rotate due to the elastic force provided by the first elastic portion <NUM> and the second elastic portion <NUM>, and the safety cover portion <NUM> may cover the injection needle <NUM>.

<FIG> is a perspective view of a main portion illustrating a syringe safety cap according to another embodiment (second embodiment) of the present disclosure, and <FIG> is a lateral view of the syringe safety cap illustrated in <FIG>.

Referring to <FIG> and <FIG>, the syringe safety cap according to the second embodiment is different from the syringe safety cap according to the first embodiment only in terms of configurations of a first elastic portion and a first axial portion, and all other elements are the same. Hereinafter, only the configurations different from the first embodiment will be described in detail.

Specifically, a first elastic portion <NUM> includes one or more bridges <NUM> and <NUM> which connect the link portion <NUM> and the base portion <NUM> and in which at least a partial area is bent. In the second embodiment, rotation of the link portion <NUM> with respect to the base portion <NUM> uses a rotational force using the bent shape of the bridges.

Also, a second elastic portion includes a spring as in the first embodiment.

Specifically, the bridges may include the first bridge <NUM> and the second bridge <NUM> which are bent in the opposite directions. The first bridge and the second bridge may be bent in a substantially "V" shape.

Also, an angle at which the first bridge <NUM> is bent and an angle at which the second bridge <NUM> is bent may be different. Also, the number of first bridges <NUM> and the number of second bridges <NUM> may be different. For example, the first elastic portion <NUM> may include a pair of first bridges <NUM>, and the second bridge <NUM> may be disposed between the pair of first bridges <NUM>.

Also, in the second embodiment, the first axial portion may consist of one or more bridges connecting the link portion <NUM> and the base portion <NUM> instead of consisting of a rotating shaft and a coupling hole.

The exemplary embodiments of the present disclosure which have been described above are only disclosed for an illustrative purpose, and those of ordinary skill in the art should be able to make various modifications, changes, and additions within the idea and scope of the present disclosure, and such modifications, changes, and additions should be construed as falling within the scope of the claims below.

Claim 1:
A syringe safety cap (<NUM>) comprising:
a base portion (<NUM>) having a mounting portion to be mounted on a cylinder (<NUM>) of a syringe;
a link portion (<NUM>) rotatably connected to the base portion (<NUM>);
a first elastic portion (<NUM>) configured to provide a rotational force so that the link portion (<NUM>) rotates with respect to the base portion (<NUM>);
a safety cover portion (<NUM>) rotatably connected to the link portion (<NUM>), detachably fixed to the base portion (<NUM>), and configured to, when detached from the base portion (<NUM>) and rotating, surround an injection needle (<NUM>) of the syringe,
characterised in that
the injection needle (<NUM>) of the syringe is located between a first axial portion configured to provide a center of rotation (R1) of the link portion (<NUM>) with respect to the base portion (<NUM>) and a second axial portion configured to provide a center of rotation (R1) of the safety cover portion (<NUM>) with respect to the link portion (<NUM>), and
wherein, in a process in which the safety cover portion (<NUM>) surrounds the injection needle (<NUM>), a direction of rotation (R1) of the link portion (<NUM>) with respect to the base portion (<NUM>) and a direction of rotation (R1) of the safety cover portion (<NUM>) with respect to the link portion (<NUM>) are provided to be the same,
wherein the syringe safety cap (<NUM>) further comprises
a second elastic portion (<NUM>) configured to provide a rotational force so that the safety cover portion (<NUM>) rotates with respect to the link portion (<NUM>).