JP2022107472A - Injection needle cover and injector with injector cover - Google Patents

Abstract

To provide an injection needle cover suitable for mass production and more safety, and an injector with the injection needle cover.SOLUTION: An injector cover comprises: a cylindrical body for fixation to an injector; a proximal arm movably coupled to the cylindrical body; and a distal arm movably coupled to the proximal arm. The distal arm has an injection needle distal end storage groove at its distal end, and the proximal arm can be stored inside the distal arm. A back face of the proximal arm can partially be in contact with the cylindrical body. The injector cover can be attached to the injector and used.SELECTED DRAWING: Figure 9

Description

The present invention relates to a needle cover and a syringe provided with the syringe cover thereof.

When disposing of a syringe after it has been used for medical procedures, it is required to safely handle the used needle installed in the syringe. If a used needle comes into contact with a medical worker, a carrier, a disposal company, etc., a medical accident infecting a disease may occur.
In order to prevent this medical accident, various needle covers for safely handling the syringe have been proposed.

As the first prior art, an injection needle cover including an opening / closing needle storage portion is disclosed.
According to this first prior art, for a syringe provided with a syringe body and a syringe needle, a pair of hinges can be opened and closed at the proximal end of the syringe needle connection for connecting the syringe needle to the syringe body. A needle storage unit is installed.
In the first prior art, the needle compartment is opened and the syringe is used. After using this syringe, the pair of injection needle storage portions can be closed and the injection needle can be stored in the injection needle storage portion (Patent Document 1).

As a second prior art, an injection needle cover with a distal end protection portion of the injection needle that can slide in the longitudinal direction of the injection needle is disclosed.
According to this second prior art, the injection needle cover is detachably installed on the syringe body with respect to the syringe provided with the syringe body and the injection needle.
The syringe cover includes a needle distal end protector that allows the syringe cover to be moved towards the distal end of the needle with respect to the syringe body.
After moving the distal end protection of the injection needle outward from the distal end of the injection needle, pull the distal end protection of the injection needle back toward the distal end of the injection needle and pull the distal end of the injection needle to the injection needle. It can be stored in the distal end protection portion (Patent Document 2).

Further, as a third prior art, an injection needle cover in which a hollow distal end cap moves back and forth along the longitudinal direction of the injection needle is disclosed.
According to this third prior art, a needle cover is installed for a syringe having a syringe body and a needle.

The injection needle cover includes a needle hub installed on the syringe body of the injection needle, a proximal cover portion movably connected to the needle hub, a central hinge movably connected to the proximal cover portion, and a central hinge and movable. It comprises a distal cover portion connected to and a hollow distal end cap movably connected to the distal cover portion.

The hollow distal end cap has an injection needle inserted inside and can move back and forth along the longitudinal direction of the injection needle.
The central hinge movably connects both the proximal cover and the distal cover. Also, the relationship between the central hinge, the proximal cover portion and the distal cover portion is such that the central hinge corresponds to the apex of the triangle, and the proximal cover portion and the distal cover portion are each connected to the apex of the triangle. The relationship corresponds to the diagonal side.

The central hinge moves vertically away from the needle with respect to the longitudinal direction of the needle.
Along with this movement, the central hinge moves so as to correspond to the apex of the triangle, and each of the proximal cover part and the distal cover part moves so as to correspond to the two hypotenuses connected to the apex of the triangle.
When the central hinge moves vertically away from the injection needle, the angle formed by the proximal cover portion and the distal cover portion changes from an obtuse angle to an acute angle. Then, the hollow distal end cap movably connected to the distal cover is pulled toward the syringe body along the injection needle.

Conversely, when the central hinge moves in the vertical direction with respect to the longitudinal direction of the injection needle toward the injection needle so that the proximal cover portion and the distal cover portion approach each other in a straight line, the hollow distal end cap Is pushed out along the needle to the side opposite to the syringe body side.
When the angle formed by the proximal cover portion and the distal cover portion is maximized, the hollow distal end cap covers the distal end of the injection needle.

US Patent Publication No. 501479 US Patent Gazette No. 5092461 US Patent Gazette No. 9662455

By the way, the process of attaching the injection needle cover to the syringe is usually performed automatically in the factory.
After arranging the injection needle cover and syringe, which are carried in large quantities by the belt conveyor and rotary table installed in the factory, in the same direction as the longitudinal direction of the injection needle installed in the syringe, the injection needle cover and the syringe Is automatically connected by a working robot or the like.

However, if the injection needle cover has a moving part as in the case of the first prior art, the injection needle cover frequently changes its direction when the injection needle cover is carried by a belt conveyor or a rotary table. Since the orientation of the injection needle cover changes constantly, it becomes difficult to adjust the orientation of the injection needle cover and the syringe before connecting the injection needle cover and the syringe. Therefore, there is a problem that the efficiency of mass production is lowered.

Further, in the case of the second prior art described above, the injection needle may be deformed or damaged when the injection needle cover is pulled back.
Similarly, in the case of the third prior art, the injection needle may be deformed or damaged because a force in the vertical direction is applied to the injection needle with reference to the longitudinal direction of the injection needle.

In the case of a syringe cover in which the movable part of the syringe cover can move along the longitudinal direction of the injection needle as in these prior arts, the distal end of the injection needle even if the distal end side of the injection needle is covered with the movable part. If the side comes into contact with the human body, the moving part can move to the proximal end side of the injection needle. As a result, it is assumed that the distal end of the injection needle comes into direct contact with the human body.
Even if a member covering the distal end of the injection needle is added to the movable part so that the distal end of the injection needle does not come into contact with the human body, if the member covering the distal end can move in the anteroposterior direction of the injection needle, the injection needle May be deformed or damaged.
In addition, even if the movable part of the syringe cover is an elastic body such as a spring that makes it difficult to return to the proximal end side of the injection needle, if the distal end side of the injection needle comes into contact with the human body beyond the repulsive force of the spring, the injection needle The distal end of the body may come into direct contact with the human body.
Further, in the case of a structure using a spring, if the moving part vigorously protrudes toward the distal end side of the injection needle, the liquid content of the injection needle after use may scatter to the surroundings.

In particular, in the case of a syringe cover having a movable part covering the distal end of the injection needle, in the case of a syringe cover having a structure in which the movable part is directly held by a finger and moved to the distal end of the injection needle, the finger is the distal end of the injection needle. The distal end of the needle may come into contact with the human body due to its proximity to.

An object of the present invention is to provide a safer injection needle cover suitable for mass production and a syringe provided with the injection needle cover.

As a result of diligent studies by the present inventors to solve the above problems,
(1) A tubular body, a proximal arm movably connected to the tubular body, and a distal arm movably connected to the proximal arm are provided, and the distal arm is distal. It has been found that an injection needle cover having a distal end storage groove for an injection needle at the end and capable of storing the proximal arm in the distal arm and (2) a syringe equipped with the injection cover meet the object of the present invention. , The present invention has been completed.

That is, the present invention
[1] A tubular body for fixing to a syringe, a proximal arm movably connected to the tubular body, and a distal arm movably connected to the proximal arm are provided.
The distal arm is provided with a needle distal end storage groove at the distal end.
The proximal arm can be retracted within the distal arm and
A portion of the back surface of the proximal arm provides a syringe cover that can come into contact with the tubular body.

Further, one of the present inventions is
[2] The syringe cover according to the above [1], wherein the cylindrical main body is provided with a claw portion for fixing to the syringe.

Further, one of the present inventions is
[3] The injection needle distal end storage groove provided at the distal end of the distal arm is more than the outside with reference to the shape of the distal end perpendicular to the longitudinal direction of the distal arm. The syringe cover according to the above [1] or [2], which has a narrow portion on the inside.

Further, one of the present inventions is
[4] The above [1] to [3], wherein the proximal arm portion is provided with an injection needle proximal end side fixing portion for fixing the injection needle to the distal arm portion side end portion of the proximal arm portion. The syringe cover according to any one of the above is provided.

Further, one of the present inventions is
[5] The above [1] to [4], wherein the proximal arm portion includes a tubular body contact portion capable of contacting the tubular body and a leg fixing portion capable of fixing the leg portion of the tubular body. It is intended to provide the syringe cover described in either.

Further, one of the present inventions is
[6] The syringe cover according to any one of [1] to [5] above, wherein the bottom of the distal arm can come into contact with the tip of the tubular body.

Further, one of the present inventions is
[7] The syringe cover according to any one of [1] to [6] above, which has a ridge on at least one of the inner surface of the distal arm and the outer surface of the proximal arm. It is a thing.

Further, one of the present inventions is
[8] The tubular body includes a proximal arm contact protrusion.
The proximal arm comprises a dorsal end and
When the proximal arm moves with respect to the tubular body, when an external force of a certain amount or more acts on the proximal arm, the back end portion provided on the proximal arm becomes tubular. The syringe cover according to any one of the above [1] to [7], which overcomes the proximal arm contact protrusion provided on the main body, is provided.

Further, the present invention
[9] Provided is a syringe provided with the syringe cover according to any one of the above [1] to [8].

In the syringe cover of the present invention, a part of the back surface of the proximal arm can come into contact with the tubular body in a state where the proximal arm is stored in the distal arm. Therefore, the entire syringe cover can be folded into a small size, and the operability of the syringe is excellent.
Further, since the syringe cover of the present invention can be kept small and folded, it is excellent in mass productivity.

Further, in the syringe cover of the present invention, a part of the back surface of the proximal arm portion can come into contact with the tubular body.
Even when an external force is applied to the distal arm in the direction of the tubular body while the entire syringe cover is folded small, a part of the back surface is in contact with the tubular body to disperse the external force. As a result of the external force being dispersed, the movable connecting portion between the tubular body and the proximal arm can be prevented from being damaged by the principle of leverage.

On the other hand, since the distal arm can store the proximal arm inside, the distal arm functions as an external member covering the proximal arm. The distal arm has a larger shape than the proximal arm and is easy to operate.
When the distal arm and the proximal arm come into contact with each other, they come into contact with each other inside the distal arm. Does not stick to the outside of. Since the portion of the distal arm that touches the hand does not have minute scratches that affect operations such as disinfection, the portion of the syringe cover that touches the hand can be maintained in a clean state.

When the syringe needle provided in the syringe is stored in the syringe cover after the use of the syringe is completed, the proximal arm and the distal arm are changed to the extended state of the distal arm. The distal end of the injection needle is stored in the distal end storage groove of the injection needle at the distal end.
Since the distal end of the injection needle is stored in the distal end storage groove of the injection needle, even if the distal end side of the injection needle is accidentally touched, the distal end of the injection needle extends beyond the distal end storage groove of the injection needle. Never go outside. It is possible to prevent a medical accident infecting a disease by contacting a medical worker, a carrier, a disposal company, etc. with the needle of a used syringe.

FIG. 1 is a schematic perspective view of a cylindrical main body 10 used in the first embodiment of the present invention. FIG. 2 is a schematic perspective view of the proximal arm portion 30 used in the first embodiment of the present invention. FIG. 3 is a schematic perspective view of the distal arm portion 50 used in the first embodiment of the present invention. FIG. 4 is a schematic perspective view of the distal arm portion 50 used in the first embodiment of the present invention. FIG. 5 is a schematic view showing a state in which the distal arm portion 50 is observed from the distal end 60 side. FIG. 6 is a schematic view showing a state in which the syringe cover 100 is folded. FIG. 7 is a schematic view showing a state in which the syringe cover 100 according to the second embodiment of the present invention is attached to the syringe 500. It is a schematic diagram for demonstrating the operation of the syringe cover 100 installed in the syringe 500 which concerns on Embodiment 2 of this invention. It is a schematic diagram for demonstrating the operation of the syringe cover 100 installed in the syringe 500 which concerns on Embodiment 2 of this invention. It is a schematic diagram for demonstrating the operation of the syringe cover 100 installed in the syringe 500 which concerns on Embodiment 2 of this invention. It is a schematic diagram for demonstrating the operation of the syringe cover 100 installed in the syringe 500 which concerns on Embodiment 2 of this invention. FIG. 12 is a schematic perspective view showing a distal arm portion used for the syringe cover 200 according to the third embodiment of the present invention. FIG. 13 is a partially enlarged schematic view for explaining the mutual relationship between the tubular main body 11 of the syringe cover 300 according to the fourth embodiment of the present invention and the proximal arm portion 31. FIG. 14 is a partially enlarged schematic view for explaining the mutual relationship between the tubular main body 11 of the syringe cover 300 according to the fourth embodiment of the present invention and the proximal arm portion 31. FIG. 15 is a schematic view of the cylindrical main body 1 used in the fifth embodiment of the present invention. FIG. 16 is a schematic perspective view of the proximal arm portion 3 used in the fifth embodiment of the present invention. FIG. 17 is a schematic perspective view of the proximal arm portion 3 used in the fifth embodiment of the present invention. FIG. 18 is a schematic perspective view of the distal arm portion 5 used in the fifth embodiment of the present invention. FIG. 19 is a schematic view for explaining the interrelationship between the tubular body 1, the proximal arm 3 and the distal arm 5 of the syringe cover 400 according to the fifth embodiment of the present invention. FIG. 20 is a schematic view for explaining the mutual operation relationship between the tubular main body 1, the proximal arm portion 3 and the distal arm portion 5 of the syringe cover 400 according to the fifth embodiment of the present invention. FIG. 21 is a schematic view for explaining the mutual operation relationship between the tubular main body 1, the proximal arm portion 3 and the distal arm portion 5 of the syringe cover 400 according to the fifth embodiment of the present invention.

The present invention will be described in detail below based on the embodiments of the invention, but the present invention is not limited to the following embodiments.

[Embodiment 1 of the invention]
The syringe cover 100 according to the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of a cylindrical main body 10 used in the first embodiment of the present invention.
Further, FIG. 2 is a schematic perspective view of the proximal arm portion 30 used in the first embodiment of the present invention.
3 and 4 are schematic perspective views of the distal arm portion 50 used in the first embodiment of the present invention, respectively.

First, the tubular main body 10 used in the first embodiment of the present invention will be described.
The tubular body 10 is provided with an insertion hole 12 for inserting a syringe (not shown). In FIG. 1, the insertion hole 12 penetrates the tubular main body 10.
Further, the tubular main body 10 is provided with a leg portion 14 for fixing to the syringe.
The number of legs 14 to be installed is not limited, but the number of legs 14 is preferably in the range of 3 to 10 in order to stably install the syringe cover on the syringe. More preferred.
In the tubular main body 10 shown in FIG. 1, a total of four legs 14 are installed on the tubular main body 10.

At the end of the leg portion 14, a fixing claw portion 14a is installed toward the inside of the insertion hole 12 of the tubular main body 10.
When the syringe cover 100 is installed on the syringe, the fixed claw portion 14a can be hung on the syringe. With the fixed claw portion 14a, it is possible to more reliably prevent the syringe cover 100 from coming off the syringe.

Further, the tubular main body 10 includes a proximal arm connecting portion 16 for movably connecting to the proximal arm 30 (see FIG. 2).
The proximal arm connecting portion 16 includes a proximal arm connecting shaft accommodating portion 18 for accommodating the tubular main body connecting shaft 32 (see FIG. 2) installed in the proximal arm 30.
The proximal arm connecting shaft storage portion 18 is provided with an open end 20, and from the open end 20, the tubular main body connecting shaft 32 installed in the proximal arm 30 is connected to the proximal arm connecting shaft storage portion 18. Can be stored in.
When the tubular body connecting shaft 32 installed in the proximal arm 30 is installed in the proximal arm connecting shaft storage portion 18, the open end 20 is deformed and the size of the open end 20 is close to that of the open end 20. It is the same as or larger than the maximum diameter of the cylindrical main body connecting shaft 32 installed on the arm portion 30. Then, inside the proximal arm connecting shaft storage portion 18, the tubular main body connecting shaft 32 installed in the proximal arm 30 can be installed.

After the cylindrical body connecting shaft 32 installed in the proximal arm 30 was stored in the proximal arm connecting shaft storage 18, the size of the open end 20 was installed in the proximal arm 30. It is smaller than the maximum diameter of the tubular body connecting shaft 32.
As a result, the proximal arm portion 30 can be prevented from falling off from the tubular main body 10.

Further, the proximal arm connecting shaft storage portion 18 has a shape in which the tubular main body connecting shaft 32 installed in the proximal arm 30 can move freely.
The shape is appropriately adopted corresponding to the shape of the tubular main body connecting shaft 32 installed on the proximal arm portion 30. In the case of the first embodiment of the present invention, the shape of the tubular main body connecting shaft 32 installed on the proximal arm portion 30 is a columnar shape (see FIG. 2). Corresponding to this columnar shape, the shape of the proximal arm connecting portion 16 is a C shape corresponding to the outer surface of the columnar shape.

The degree of contact between the two is adjusted by adjusting the cross-sectional shape of the tubular main body connecting shaft 32 installed on the proximal arm 30 and the inner surface shape of the proximal arm connecting shaft storage portion 18 of the proximal arm 30. As a result, if the friction of the proximal arm 30 against the tubular body 10 is strong, the proximal arm 30 does not easily move. On the contrary, if the friction of the proximal arm 30 with respect to the tubular body 10 is weak, the proximal arm 30 moves easily.
By adjusting the degree of contact between the two in this way, it is possible to prevent the proximal arm portion 30 from being unintentionally separated from the tubular main body 10 during the manufacture of the syringe cover 100 according to the first embodiment of the present invention. A constant shape can be maintained.
This relationship is the same in the following embodiments.

Next, the proximal arm portion 30 used in the first embodiment of the present invention will be described.
As shown in FIG. 2, the proximal arm portion 30 includes a tubular body connecting shaft 32, a side surface 34, a back surface 36, a distal arm portion connecting portion 38, and a back end portion 46.

The tubular main body connecting shaft 32 has a cylindrical shape and is connected to the inner side surfaces 34a and 34a of the side surface 34. The tubular main body connecting shaft 32 is stored in the proximal arm connecting shaft accommodating portion 18 provided in the proximal arm connecting portion 16 of the tubular main body 10.
The tubular body connecting shaft 32 installed in the proximal arm 30 shown in FIG. 2 is a proximal arm connecting shaft retracted in the proximal arm connecting portion 16 of the tubular body 10 shown in FIG. It can rotate freely in the portion 18. Therefore, the tubular main body 10 and the proximal arm portion 30 can be movably connected.

Opposing side surfaces 34, 34 of the proximal arm 30 are connected to the back surface 36.
Further, the outer surfaces 34b and 34b of the side surface 34 can be stored inside the distal arm portion 50 shown in FIGS. 3 and 4.

The proximal arm 30 also includes a distal arm connecting portion 38 for movably connecting to the distal arm portion 50 (see FIGS. 3 and 4).
The distal arm connecting portion 38 includes a distal arm connecting shaft accommodating portion 40 for accommodating the proximal arm connecting shaft 52 (see FIGS. 3 and 4) installed in the distal arm 50. ing.
The distal arm connecting shaft storage portion 40 includes an open end 42, and from the open end 42, the proximal arm connecting shaft 52 installed on the distal arm 50 is connected to the distal arm connecting shaft storage portion. Can be stored in 40.
When the proximal arm connecting shaft 52 installed in the distal arm 50 is installed in the distal arm connecting shaft storage 40, the open end 42 is deformed and the size of the open end 42 is increased. It is equal to or larger than the maximum diameter of the proximal arm connecting shaft 52 installed on the distal arm 50. Then, the proximal arm connecting shaft 52 installed in the distal arm 50 can be installed inside the distal arm connecting shaft storage portion 40.

After the proximal arm connecting shaft 52 installed in the distal arm 50 is stored in the distal arm connecting shaft storage 40, the size of the open end 42 is installed in the distal arm 50. It is smaller than the maximum diameter of the proximal arm connecting shaft 52.
As a result, the distal arm portion 50 can be prevented from falling off from the proximal arm portion 30.

Further, the distal arm connecting shaft storage portion 40 has a shape in which the proximal arm connecting shaft 52 installed in the distal arm 50 can move freely.
The shape is freely adopted corresponding to the shape of the proximal arm connecting shaft 52 installed on the distal arm 50. In the case of the first embodiment of the present invention, the shape of the proximal arm connecting shaft 52 installed on the distal arm 50 is cylindrical (see FIGS. 3 and 4). Corresponding to this cylinder, the shape of the distal arm connecting shaft storage portion 40 is a C shape corresponding to the outer surface of the cylinder.

Adjust the cross-sectional shape of the proximal arm connecting shaft 52 installed on the distal arm 50 and the inner surface shape of the distal arm connecting shaft storage 40 of the proximal arm 30 to adjust the degree of contact between the two. As a result, if the friction of the distal arm 50 with respect to the proximal arm 30 is strong, the distal arm 50 does not easily move. On the contrary, if the friction of the distal arm 50 with respect to the proximal arm 30 is weak, the distal arm 50 moves easily.
By adjusting the degree of contact between the two in this way, it is possible to prevent the distal arm portion 50 from being unintentionally separated from the proximal arm portion 30 during the manufacture of the syringe cover 100 according to the first embodiment of the present invention. , Can keep a constant shape.
This relationship is the same in the following embodiments.

Next, the distal arm portion 50 used in the first embodiment of the present invention will be described.
As shown in FIGS. 3 and 4, the distal arm 50 comprises a proximal arm connecting shaft 52, side 54, dorsal 56 and distal end storage groove 58 of the injection needle.

The proximal arm connecting shaft 52 has a cylindrical shape and is connected to the inner side surfaces 54a and 54a of the side surface 54. The proximal arm connecting shaft 52 is stored in the distal arm connecting shaft accommodating portion 40 provided in the distal arm connecting portion 38 of the proximal arm 30.
The proximal arm connecting shaft 52 installed on the distal arm 50 shown in FIGS. 3 and 4 is proximal to the distal arm connecting 38 of the proximal arm 30 shown in FIG. It can rotate freely in the arm connecting shaft storage portion 40. Therefore, the proximal arm portion and the distal arm portion 50 can be movably connected.

Opposing sides 54, 54 of the distal arm 50 are connected to the back 56.
Further, the inner side surfaces 54a and 54a of the side surface 54 can store the proximal arm portion 30 inside.

The distal arm 50 comprises an injection needle distal end storage groove 58 at the distal end 60 of the distal arm 50 corresponding to the upper side of each of FIGS. 3 and 4.
The injection needle distal end storage groove 58 is formed by opposing protrusions 62, 62.

FIG. 5 is a schematic view showing a state in which the distal arm portion 50 is observed from the distal end 60 side.
As shown in FIG. 5, the inner side is narrower than the outer side based on the shape of the distal end 60 in the direction perpendicular to the longitudinal direction of the distal arm portion 50. The medial side means the back surface 56 side of the distal arm portion 50, and the lateral side means the opposite side.
In the case of the first embodiment of the present invention, the shape of the distal end 60 of the distal arm 50 is Y-shaped.
Since the distal end 60 of the distal arm 50 is narrower on the inside than on the outside, the injection needle is smoothly stored in the injection needle distal end storage groove 58 when the distal arm 50 is brought into contact with the injection needle. can.

FIG. 6 is a schematic view showing a state in which the proximal arm portion 30 is housed inside the distal arm portion 50 and the syringe cover 100 is folded.
As shown in FIG. 6, in the syringe cover 100 according to the first embodiment of the present invention, the proximal arm portion 30 is housed inside the distal arm portion 50. At this time, the outer surface 34b of the proximal arm 30 and the inner surface 54a of the distal arm 50 can prevent the proximal arm 30 and the distal arm 50 from unintentionally opening, respectively. It is preferable that at least a part of them are in contact with each other.

Further, the proximal arm portion 30 includes a back surface protrusion 44 which is a part of the back surface on the back surface 36.
As shown in FIG. 6, when the syringe cover 100 is folded, the back protrusion 44 is in contact with the tubular main body 10.
The side surface 54 of the distal arm 50 is also in contact with the tubular body 10.

The movable portion 70 formed by the tubular main body connecting shaft 32 installed in the proximal arm 30 and the proximal arm connecting shaft accommodating portion 18 installed in the tubular main body 10 is the distal arm 50. It is located proximal to the contact portion 72 between the side surface 54 and the tubular main body 10.
That is, the movable portion 70 formed by the tubular main body connecting shaft 32 installed on the proximal arm 30 and the proximal arm connecting shaft accommodating portion 18 installed on the tubular main body 10 is based on FIG. It is below the contact portion 72 between the side surface 54 of the proximal arm portion 50 and the tubular main body 10.
In this case, while the proximal arm portion 30 and the distal arm portion 50 are kept in a state where they do not move with each other due to frictional force or the like, the contact portion 72 is a movable portion 70 centered on the cylindrical body connecting shaft 32. Interfere with the rotational movement of.
Since the rotational movement of the movable portion 70 about the cylindrical body connecting shaft 32 is hindered, the syringe cover 100 can be maintained in the folded state.

On the contrary, when an external force is applied in the direction of separating the proximal arm 30 and the distal arm 50, a frictional force or the like that can keep the proximal arm 30 and the distal arm 50 stationary from each other is applied. When the external force is exceeded, the fixed state of the proximal arm 30 and the distal arm 50 is released, and the proximal arm 30 and the distal arm 50 move.

On the other hand, when an external force is applied from the back 56 side of the distal arm 50 to the tubular body 10 side, if the proximal arm 30 does not have the back protrusion 44 on the back 36, the proximal arm 30 An external force is applied to the movable portion 70 formed by the installed tubular main body connecting shaft 32 and the proximal arm connecting shaft accommodating portion 18 installed in the tubular main body 10.
In this case, the movable portion 70 may be damaged due to the principle of leverage.
In the case of the syringe cover 100 according to the first embodiment of the present invention, since the proximal arm portion 30 has the back surface protrusion 44 on the back surface 36, the distal arm portion 50 is moved from the back surface 56 side to the tubular body 10 side. Even when an external force is applied, the external force is also distributed to the back projection 44. As a result, damage to the movable portion 70 can be prevented.

[Embodiment 2 of the invention]
Next, the syringe 500 provided with the syringe cover according to the second embodiment of the present invention will be described.
FIG. 7 is a schematic view showing a state in which the syringe cover 100 according to the second embodiment of the present invention is attached to the syringe 500.
The syringe 500 includes a needle 510, a syringe body 520, a distal end tube 530 and a plunger rod 540.
The plunger rod 540 provided in the syringe 500 includes a flange 550 and a flexible sealing member 560, and a liquid agent such as an aqueous solution of a drug is provided between the inside of the syringe body 520 and the flexible sealing member 560. Can be held inside.
When the flange 550 of the syringe 500 is pushed in the direction of the injection needle 510, the liquid agent held inside the syringe body 520 can be discharged to the outside from the distal end of the injection needle 510.

As shown in FIG. 7, the injection needle 510 is provided with a protective cap 580. The protective cap is made of a hollow cylindrical synthetic resin having a lid at the distal end, and is detachably installed so as to cover the injection needle 510.
The syringe cover 100 can be installed on the syringe body 520 from the distal end side of the injection needle 510 in the longitudinal direction of the syringe 500.
The syringe 500 includes a distal end tube 530 in the syringe body 520. The distal end tube 530 has an outer diameter larger than that of the syringe 500, and there is a step 570 between the syringe body 520 and the distal end tube 530.
A fixed claw portion 14a installed inward is attached to the end portion of the leg portion 14 of the syringe cover 100 on the step 570.
The fixed claw portion 14a can surely prevent the syringe cover 100 from falling off from the syringe 500.
If the protective cap 580 is removed, the syringe 500 provided with the syringe cover 100 can be used, for example, to inject a drug into a patient.

8 to 11 are schematic views for explaining the operation of the syringe cover 100 installed in the syringe 500 according to the second embodiment of the present invention, respectively.
The proximal arm 30 can be stored within the distal arm 50.
It is preferable that the outer surface of the proximal arm 30 can be in contact with at least a part of the inner surface of the distal arm.
For example, even when an external force such as pushing with a finger is applied to the distal arm 50 of the syringe cover 100, the outer surfaces 34b and 34b of the proximal arm 30 and the distal arm 50, which are in contact with each other, respectively, are applied. The contact state is maintained until the frictional force generated between the inner side surfaces 54a and 54a of the above is exceeded.

On the other hand, for example, when an external force exceeding the frictional force between the outer surfaces 34b and 34b of the proximal arm 30 and the inner surfaces 54a and 54a of the distal arm 50, which are in contact with each other, is applied, the contact state between the two is changed. It will be released. As a result, the proximal arm 30 and the distal arm 50 move in the distal direction.

Along the injection needle 510, the injection needle distal end storage groove 58 can be moved distally to the distal end 60 of the distal arm 50.
The injection needle distal end storage groove 58 installed at the distal end 60 of the distal arm 50 is open toward the injection needle 510. When the distal arm 50 moves along the injection needle 510, there is no portion where the distal arm 50 fixes the injection needle 510, so that the injection is mistakenly made when the distal arm 50 moves. It is possible to prevent the needle 510 from being damaged.

As shown in FIGS. 10 and 11, the injection needle 510 is placed on the distal end 60 side of the distal arm 50 with the proximal arm 30 and the distal arm 50 extended. It can be stored inside the distal end storage groove 58.
Since the injection needle 510 is not exposed to the outside, it is possible to prevent the injection needle 510 provided in the used syringe 500 from coming into contact with a medical worker, a carrier, a disposal company, or the like.

[Embodiment 3 of the invention]
Next, the syringe cover 200, which is a modified example of the syringe cover 100 according to the first embodiment of the present invention, will be described.
The syringe cover 200 uses a different distal arm as compared to the syringe cover 100 according to the first embodiment.
The changes will be described below.
FIG. 12 is a schematic perspective view showing a distal arm portion used for the syringe cover 200 according to the third embodiment of the present invention.
Square-cuboid-shaped ridges 55 and 55 are provided on the inner surfaces 54a and 54a of the distal arm 51 in a direction perpendicular to the longitudinal direction of the distal arm 51, respectively.
The shapes of the raised portions 55 and 55 are appropriately set according to the opening / closing operation of the proximal arm portion 31 and the distal arm portion 51, and are not limited. When the raised portions 55 and 55 are raised or the area parallel to the inner surface 54a and 54a of the distal arm portion 51 is increased, the frictional force acting between the proximal arm portion 30 and the distal arm portion 51 is generated. As it becomes larger, a larger external force is required to open and close the proximal arm 30 and the distal arm 51.
On the contrary, when the raised portions 55 and 55 are lowered or the area parallel to the inner side surfaces 54a and 54a of the distal arm portion 51 is reduced, the friction acting between the proximal arm portion 30 and the distal arm portion 51 acts. Since the force is small, less external force is sufficient to open and close the proximal arm 30 and the distal arm 51.

By installing the raised portions 55 and 55 with respect to the distal arm portion 51, the external force required for opening and closing the proximal arm portion 30 and the distal arm portion 51 can be adjusted.

In FIG. 12, rectangular cuboid-shaped ridges 55 and 55 are provided on the inner surfaces 54a and 54a of the distal arm 51, respectively, but the same applies to other embodiments of the present invention. For example, a raised portion may be provided on the outer surfaces 34b and 34b of the proximal arm portion 30 of the syringe cover 100 according to the first embodiment.
The raised portions 55, 55 are preferably installed on at least one of the outer surface of the proximal arm and the inner surface of the distal arm.

By installing the syringe cover 200 in the syringe 500 of the second embodiment described above, a syringe having the syringe cover 200 can be obtained. This relationship also applies to the following embodiments.

[Embodiment 4 of the invention]
Next, the syringe cover 300, which is a modified example of the syringe cover 100 according to the first embodiment of the present invention, will be described.
13 and 14 are partially enlarged schematic views for explaining the mutual relationship between the tubular main body 11 of the syringe cover 300 according to the fourth embodiment of the present invention and the proximal arm portion 31.
The proximal arm connecting portion 17 installed on the tubular body 11 of the syringe cover 300 is provided with a proximal arm contact protrusion 22. On the other hand, a back end portion 46 is provided on the back surface 37 of the proximal arm portion 31.
The back end portion 46 is located at the end portion of the back surface 37 on the side closer to the cylindrical main body connecting shaft 32.
The configuration other than the above is the same as that of the syringe cover 100 described above.

When the proximal arm 31 of the syringe cover 300 is pushed upward in FIGS. 13 and 14, the proximal arm 31 rotates counterclockwise about the tubular body connecting shaft 32.
Before rotation, the proximal arm contact protrusion 22 of the tubular body 11 and the back end 46 on the back 37 of the proximal arm 31 are not in contact with each other.

Further, when the proximal arm 31 rotates about the tubular body connecting shaft 32, the proximal arm contact protrusion 22 of the tubular body 11 and the back end 46 on the back 37 of the proximal arm 31 come together. Contact each other.
When an external force of a certain amount or more is applied to the proximal arm portion 31, at least one of the proximal arm contact protrusion 22 and the back end 46 is deformed, and the back end 46 gets over the proximal arm contact protrusion 22.
13 and 14 show the states before and after the back end portion 46 gets over the proximal arm contact protrusion 22, respectively.

After the back end 46 gets over the proximal arm contact protrusion 22, the back end 46 of the proximal arm 31 comes into contact with the proximal arm contact protrusion 22, so that the proximal arm 31 is tubular. Prevents the shape body from rotating clockwise around the connecting shaft 32.
When the syringe cover 300 is placed on the syringe, the proximal arm 31 and the distal arm 50 should remain extended along the syringe needle because the rotation of the proximal arm 31 is impeded. Can be done.
Further, even if an unexpected external force acts on the syringe cover, it is possible to prevent the injection needle from being exposed to the outside.

[Embodiment 5 of the invention]
Next, the syringe cover 400, which is a modified example of the syringe cover 100 according to the first embodiment of the present invention, will be described.
FIG. 15 is a schematic view of the cylindrical main body 1 used in the fifth embodiment of the present invention.
16 and 17 are schematic perspective views of the proximal arm 3 used in the fifth embodiment of the present invention, respectively.
FIG. 18 is a schematic perspective view of the distal arm portion 5 used in the fifth embodiment of the present invention.
FIG. 19 is a schematic view for explaining the interrelationship between the tubular body 1, the proximal arm 3 and the distal arm 5 of the syringe cover 400 according to the fifth embodiment of the present invention.
20 and 21 are schematic views for explaining the mutual operation relationship between the tubular body 1, the proximal arm 3 and the distal arm 5 of the syringe cover 400 according to the fifth embodiment of the present invention. ..
Hereinafter, the syringe cover 400 according to the fifth embodiment of the present invention will be described with a focus on the differences from the syringe cover 100 according to the first embodiment of the present invention.

As illustrated in FIG. 15, an opening 19 is provided in the cylindrical main body 1. The opening 19 may or may not penetrate the proximal arm connecting portion 16 and may have a partition wall inside. This relationship is the same for the proximal arm 3 and the distal arm 5. In the case of the syringe cover 400 according to the fifth embodiment of the present invention, a partition wall is provided inside. The opening 19 is also symmetrically provided on the opposite side of the proximal arm connecting portion 16.
For example, when the syringe cover 400 according to the fifth embodiment of the present invention is produced, the opening 19 automatically recognizes the orientation of the tubular main body 1 by a camera or the like, and identifies information or the like for adjusting the position before assembly. Can be used for.

As illustrated in FIGS. 16 and 17, a substantially J-shaped injection needle proximal end side fixing portion 48 is installed at the distal arm portion side end 49 of the proximal arm 3, and the injection needle is provided. Can be hung on the proximal end side fixing portion 48 of the injection needle to fix the injection needle inside the distal arm portion 5.
Further, a plurality of protrusions 24 are provided in parallel on the back surface of the distal arm portion 5, and the distal arm portion 5 can be easily moved along the injection needle with a finger.

Protrusions 80 and 80 for fixing the leg portion 14 of the tubular main body 1 are provided on the inner sides 34a and 34a of the side surfaces 34 and 34 of the proximal arm portion 3, respectively. Further, an opening 39 is provided in the proximal arm portion 3, and for example, when the syringe cover 400 according to the fifth embodiment of the present invention is produced, the orientation of the proximal arm portion 3 is automatically recognized by a camera or the like. However, it can be used for identification information or the like for adjusting the position before assembly.

As illustrated in FIG. 18, the injection needle distal end storage groove 58 of the distal arm 5 covers the tip of the injection needle when the injection needle is internally stored inside the distal arm 5. Can be stored in. The protrusions 62 and 62 allow the tip of the injection needle to be smoothly retracted inside the distal end storage groove 58 of the injection needle.
The distal arm 5 is provided with openings 64, 66. For example, when the syringe cover 400 according to the fifth embodiment of the present invention is produced, the direction of the distal arm 5 is automatically oriented by a camera or the like. It can be used for identification information or the like for recognizing and adjusting the position before assembly.

When the proximal arm 3 and the distal arm 5 are moved from the tubular body 1 toward the tip of the syringe needle as illustrated in FIG. 19, the injection needle can be stored inside the distal arm 5. Since the injection needle is not exposed to the outside, it is possible to prevent accidents such as accidental sticking of a used injection needle by a medical person or the like.

FIG. 20 illustrates that the proximal arm 3 and the distal arm 5 are attracted to the tubular body 1 side so that a syringe (not shown) can be used.
The tubular body contact portion 82, which is a part of the back surface of the proximal arm portion 3, is in contact with the tubular body 1. Even if the distal arm 5 is pushed toward the tubular body 1, the proximal arm 3 and the distal arm 5 stop in the state shown in FIG. 20 and do not move toward the tubular body 1, so that the tubular body connecting shaft 32 It is possible to prevent the syringe cover 400 according to the fifth embodiment of the present invention from being damaged by the principle of the cylinder with the fulcrum as a fulcrum.

Further, the protruding portions 80 of the leg portion fixing portion 84 installed on the proximal arm portion 3 for fixing the leg portion 14 of the tubular main body 1 sandwich the leg portion 14 from both sides of the leg portion 14 of the tubular main body 1. Fix it. As a result, for example, when the syringe cover 400 according to the fifth embodiment of the present invention is produced, the orientation of the syringe cover 400 is changed by opening and closing the proximal arm 3 while the syringe cover 400 is being transferred by a belt conveyor or the like. It can be prevented and can be mass-produced smoothly.

FIG. 21 illustrates a state in which the proximal arm 3 and the distal arm 5 are extended from the tubular body 1 side toward the tip of the injection needle, and the injection needle 510 is stored inside the distal arm 5. In FIG. 21, only the part of the injection needle 510 of the syringe is shown, and the other parts of the syringe are not shown.
The injection needle 510 includes an injection needle proximal end side fixing portion 48 installed at the distal arm side end 49 (see FIG. 16) of the proximal arm 3 and an injection needle distal end storage of the distal arm 5. It is supported by two points of the groove 58. The injection needle 510 is fixed by a total of three points, that is, the tubular body 1 side, the injection needle proximal end side fixing portion 48, and the injection needle distal end storage groove portion 58. As a result, the injection needle 510 is not exposed from the distal arm portion 5 by shaking the syringe cover 400, and accidents such as the used injection needle being accidentally stabbed by a medical personnel or the like can be prevented.

By arranging the position of the injection needle proximal end side fixing portion 48 close to the proximal end side of the injection needle 510, even if an unexpected external force acts on the syringe cover 400, the injection needle 510 is deformed and substantially J. It is possible to prevent the injection needle from being exposed to the outside by slipping through the fixed portion 48 on the proximal end side of the injection needle. Further, according to the principle of leverage, the proximal end of the injection needle 510 is the point of action, and the contact point between the substantially J-shaped proximal end side fixing portion 48 of the injection needle and the injection needle 510 is the point of effort. Can be brought close to each other to reduce the force acting on the point of action.

The position of the contact point between the substantially J-shaped injection needle proximal end side fixing portion 48 and the injection needle 510 is the proximal end of the injection needle 510 with reference to the length of the distal end and the proximal end of the injection needle 510. It is preferably in the range of 1/2 from the side, more preferably in the range of 1/3 from the proximal end side of the injection needle 510, and in the range of 1/4 from the proximal end side of the injection needle 510. More preferred.

In the case of the syringe cover 400 of the present invention, damage to the injection needle 510 can be prevented even when an unexpected external force acts on the syringe cover 400.

Further, from the state of the syringe cover 400 according to the fifth embodiment of the present invention exemplified in FIG. 21, the distal arm portion 5 is further leftward in the case of FIG. 21, that is, the injection needle 510 is retracted by the distal arm portion 5. When pushed with a finger or the like in the direction of movement, the bottom portion of the distal arm portion 5 comes into contact with the tip portion 13 of the tubular main body 1.
As a result of the bottom of the distal arm 5 coming into contact with the tip 13 of the tubular body 1, the distal arm 5 cannot bend forward further to the left from the state of being in contact with the tip 13 of the tubular body 1.
For example, when the distal arm 5 is strongly pressed with a finger, or when the syringe with the syringe cover 400 is discarded after using the syringe with the syringe cover 400, the distal arm 5 with the syringe cover 400 is used. Preventing the distal arm 5 from bending forward and breaking the injection needle 510 or bending the injection needle 510 to expose it to the outside of the distal arm 5 even when pushed by waste or the like. Can be done.

The syringe cover and the syringe provided with the syringe cover according to the present invention can be widely applied not only to medical sites such as hospitals, but also to applications for experiments and research.

1,10,11 Cylindrical body 12 Insertion hole 13 Tip part 14 Leg part 14a Fixed claw part 16,17 Proximal arm part connection part 18 Proximal arm part connection shaft storage part 19,39,64,66 Opening 20, 42 Open end 22 Proximal arm contact protrusions 3,30,31 Proximal arm 32 Cylindrical body connecting shaft 34,54 Sides 34a, 54a Inner side 34b Outer side 36,37,56 Back 38 Distal arm connection Part 40 Distal arm connecting shaft storage 44 Back protrusion 46 Back end 5,50,51 Distal arm 52 Proximal arm connecting shaft 55 Raised part 58 Injection needle distal end storage groove 60 Distal end 62 Projection plate 68 Bottom 70 Movable part 72 Contact part 80 Protrusion part 82 Cylindrical body Contact part 84 Leg fixing part 100, 200, 300, 400 Injection cover 500 Injection device 510 Injection needle 520 Injection body 530 Distal end tube 540 Plunger Rod 550 Flange 560 Flexible Sealing Member 580 Protective Cap

Claims (9)

It is provided with a tubular body for fixing to a syringe, a proximal arm movably connected to the tubular body, and a distal arm movably connected to the proximal arm.
The distal arm is provided with a distal end storage groove for the injection needle at the far end.
The proximal arm can be retracted within the distal arm and
A syringe cover that allows a portion of the back of the proximal arm to come into contact with the tubular body. The syringe cover according to claim 1, wherein the cylindrical body is provided with a claw portion for fixing to the syringe. The portion of the distal end storage groove of the injection needle installed at the far end of the distal arm is narrower on the inner side than the outer side based on the far end shape in the direction perpendicular to the longitudinal direction of the distal arm. The syringe cover according to claim 1 or 2. 7. Syringe cover. The syringe according to any one of claims 1 to 4, wherein the proximal arm portion includes a tubular body contact portion capable of contacting the tubular body and a leg fixing portion capable of fixing the leg portion of the tubular body. cover. The syringe cover according to any one of claims 1 to 5, wherein the bottom of the distal arm can contact the tip of the tubular body. The syringe cover according to any one of claims 1 to 6, wherein a ridge is provided on at least one of the inner surface of the distal arm and the outer surface of the proximal arm. The tubular body comprises a proximal arm contact protrusion.
The proximal arm comprises a dorsal end and
When the proximal arm moves with respect to the tubular body, when an external force of a certain amount or more acts on the proximal arm, the back end portion provided on the proximal arm becomes tubular. The syringe cover according to any one of claims 1 to 7, which overcomes the proximal arm contact protrusion provided on the main body. A syringe comprising the syringe cover according to any one of claims 1 to 8.

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