JP2002248168A - Placed needle constructed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a placed needle constructed body with which a tip of a needle of a core needle can be covered after used with an easy operation, being not complicated structure and being not widened distance and a disposal of wastes is highly safety. SOLUTION: A placed needle constructed body 1 has an over needle 2 with a hub composed of an over needle 21 that is a placed needle and an over needle hub 22, a core needle 3 with a hub composed of a core needle 31 that is used with inserted in the over needle 21 and an core needle hub 32, a protector 4 that covers a tip of a needle 311 of the core needle 31, and a connecting material 7 that connects the over needle hub 22 and the protector 4. In the case that the core needle 3 with the hub is moved to the end of the base relative to the over needle 2 with the hub, the protector 4 moves the tip end direction relative to the core needle 31 and transferred to the second position that covers the tip of the needle 311. At the second position, a slope angle of the first position 51 of a protector 5 becomes smaller than the core needle 31 and exhibits a braking function to prohibit (inhibit) a relative movement against the core needle 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an indwelling needle assembly. More specifically, for example, the present invention relates to an indwelling needle assembly used to puncture a blood vessel at the time of infusion or blood collection.

[0002]

2. Description of the Related Art When an infusion is performed on a patient, an indwelling needle connected to an infusion line is punctured into a patient's blood vessel, and is indwelled. Such an indwelling needle has a hollow outer needle,
An outer needle hub fixed to the proximal end of the outer needle, an inner needle inserted into the outer needle and having a sharp needle tip at a distal end, and an inner needle hub fixed to the proximal end of the inner needle. ing.

When puncturing the indwelling needle into a patient's blood vessel, the inner needle is inserted into the outer needle, and the puncture operation is performed with the needle tip of the inner needle protruding from the tip of the outer needle. When the needle tip of the inner needle reaches the inside of the blood vessel, the blood flowing from the opening of the needle tip flows through the inner lumen of the inner needle and flows into the inside of the transparent inner needle hub (flashback). Thereby, it can be confirmed that the inner needle has secured the blood vessel.

[0004] After confirming the flashback, the inner needle and the outer needle are advanced slightly, and the tip of the outer needle is inserted into the blood vessel. Next, while grasping the outer needle by hand, the inner needle is pulled out from the outer needle, and the connector of the infusion line is connected to the outer needle hub. Then, the infusion is administered through the connected infusion line and the outer needle.

By the way, the inner needle extracted from the outer needle is
Since it becomes unnecessary, it is disposed of. However, if this is discarded as it is, there is a risk that an accident may occur in which a disposal worker or the like accidentally stabs a finger or the like with the tip of the inner needle. In particular, since blood adheres to and remains on the surface and inside of the inner needle, infection may occur due to such a stab.

Therefore, it is preferable that the used inner needle be stored in a hard and strong dedicated container that does not stick the needle tip and discarded. Because it is difficult to carry it with you from the viewpoint of improving work efficiency, at present, used inner needles should be disposed of in the opened packaging material containing the indwelling needle kit, or discarded, Measures have been taken, such as placing a cap on the needle tip and discarding it.

However, even when such an inner needle is wrapped with a wrapping material or covered with a cap, blood adhering to or remaining on the inner needle may reach the operator's hand or work may be performed with the needle of the inner needle. In order to prevent erroneous stabbing of the user's hand, great care must be taken and there is a problem that disposal of the inner needle after use requires a great deal of trouble.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to cover the used inner needle tip with a simple operation without complicating the structure and increasing the diameter of the inner needle. It is an object of the present invention to provide a highly indwelling needle assembly.

[0009]

This and other objects are achieved by the present invention which is defined below as (1) to (10).

(1) An inner needle having a sharp needle tip at the tip, an inner needle hub installed on the proximal end side of the inner needle, a hollow outer needle into which the inner needle can be inserted, and the outer needle An outer needle hub installed on the proximal end side of the inner needle, a protector attached to the inner needle and movable in an axial direction of the inner needle, and a connecting means for connecting the outer needle hub and the protector. In the indwelling needle assembly, the protector has at least one brake portion formed with a hole through which the inner needle can pass,
And from the first posture movable in the axial direction of the inner needle,
When the inner needle is covered with the needle tip, the inner needle is deformed to a second position in which the movement of the inner needle in the axial direction is restricted, and the brake unit is configured to be in the second position. The angle formed between the longitudinal axis direction of the brake portion and the axial direction of the inner needle is smaller than in the first posture, so that the frictional force between the inner peripheral surface of the hole and the surface of the inner needle is reduced. And restricting the movement of the protector in the axial direction of the inner needle, wherein the connecting means deforms the protector to the second position, thereby allowing the outer needle hub and the outer needle hub to move. An indwelling needle assembly, wherein the connection with the protector is released.

(2) The protector includes an urging means for urging the brake portion so as to reduce an angle formed between a longitudinal axis direction of the brake portion and an axial direction of the inner needle; The posture of the inner needle, the inclination defining means for defining the inclination of the brake portion with respect to the inner needle, when the movement to the tip of the inner needle, the regulation by the inclination defining means is released, thereby the The indwelling needle assembly according to the above (1), which is configured to change from the first posture to the second posture.

(3) The protector is formed by deforming an elastic plate-like member. The protector has a hole, a second hole through which the inner needle can penetrate, and a needle tip located closer to the hole and the second hole. A protector body having an engaging portion for the inner needle formed on the side, wherein the protector is configured such that the inner needle penetrates the hole and the second hole when in the first posture, The engaging portion is engaged with the inner needle, and from that state, the distal end moves relatively to the inner needle to disengage the engaging portion from the inner needle. The indwelling needle assembly according to the above (1) or (2), wherein the indwelling needle assembly is configured to be elastically deformed to change from the first posture to the second posture.

(4) The protector body has a substantially S-shape as a whole, the hole is formed at a substantially central portion of the protector body, and the second hole is provided with a needle of the protector body. The above (3) formed on the original side
An indwelling needle assembly according to item 1.

(5) The protector includes a cover for covering at least a part of the protector main body, and when an external force in a proximal direction and / or a distal direction is applied to the cover in the second position, A means for applying a force to the plate-like member near the second hole so as to reduce an angle formed between the plate-like member near the second hole and the axial direction of the inner needle. , The cover part is the second
The indwelling needle assembly according to the above (3) or (4), which has a function of preventing an operation of moving the distal end portion of the protector main body in the distal direction in the posture described above.

(6) The indwelling needle assembly according to the above (5), wherein the cover portion is provided continuously from the plate-shaped member near the second hole.

(7) The inner needle hub is further moved in a proximal direction relative to the outer needle hub from the state in which the protector is in the second posture, so that the outer needle hub and the outer needle hub can be moved. The indwelling needle assembly according to any one of the above (1) to (6), wherein the indwelling needle assembly is separated from the protector.

(8) The force according to (7), wherein a force required to separate the outer needle hub and the protector is smaller than a sliding resistance force of the protector on the inner needle in the second posture. Indwelling needle assembly.

(9) The indwelling needle assembly according to any one of (1) to (8), wherein the connecting means has a break portion that breaks when the protector and the outer needle hub are separated.

(10) The connecting means is provided on the outer needle hub and is constituted by a locking portion with which a part of the protector can be engaged, and the protector is moved from the first position to the second position. The indwelling needle assembly according to any one of (1) to (8), wherein the engagement is released by deforming the needle.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an indwelling needle assembly according to the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

<First Embodiment> FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment of an indwelling needle assembly according to the present invention, and FIG. 3 is a view taken along line XX in FIG. 4 and 5
FIG. 3 is a longitudinal sectional view showing a protector provided in the indwelling needle assembly shown in FIGS. 1 and 2, respectively. In the following, the right side in FIGS. 1, 2, 4 and 5 is referred to as “tip”,
The left side will be described as a “base end”, the upper side as “one end”, and the lower side as “other end”.

The indwelling needle assembly 1 shown in these figures has an outer needle and an inner needle, and particularly constitutes an infusion indwelling needle assembly. An outer needle 2 with a hub constituted by an outer needle hub 22 provided on the proximal end side of the outer needle 21, an inner needle 31 used by being inserted into the outer needle 21, and a proximal end of the inner needle 31 Inner needle hub 32 provided on the side
And a needle tip 31 of the inner needle 31
And a protector 4 capable of storing (covering) 1.
Hereinafter, the configuration of each unit will be described.

The outer needle 21 preferably has a hollow shape and has a certain degree of flexibility. Although the constituent material of the outer needle 21 is not particularly limited, for example, various soft resins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyurethane, and polyether nylon resin are preferable.

The outer needle 21 may have all or part of its internal visibility. In addition, the outer needle 21
An X-ray contrast agent such as barium sulfate or barium carbonate may be blended in the constituent material described above to have a contrast function.

The distal end of the outer needle 21 has a tapered shape in which the outer diameter gradually decreases toward the distal end in order to puncture the living body easily and with minimal invasion.

An outer needle hub 22 is fixed to the proximal end of the outer needle 21 in a liquid-tight manner, and the lumen of the outer needle 21 and the inside of the outer needle hub 22 communicate with each other. The outer needle hub 22 is a substantially cylindrical member, and has a tapered shape whose outer diameter and inner diameter gradually increase in the proximal direction.

The outer needle hub 22 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The outer needle 21 is fixed to the outer needle hub 22 by, for example, caulking, fusion (heat fusion, high-frequency fusion, or the like), bonding with an adhesive, or the like.

The inner needle 31 is a hollow needle and is made of, for example, a metal material such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy. A sharp needle tip 311 is formed at the tip of the inner needle 31. The shape of the needle tip 311 is not particularly limited. In the present embodiment, the needle tip 311 has a shape having a blade surface inclined at a predetermined angle with respect to the axis of the inner needle 31.

The inner needle 31 is used in a state of being inserted into the lumen of the outer needle 21, that is, in a state shown in FIG. Hereinafter, this state is referred to as an “assembled state”.

The length of the inner needle 31 is such that at least the needle tip 311
The length is such that it protrudes from

The proximal end of the inner needle 31 is fixed to the distal end of the inner needle hub 32, and the lumen of the inner needle 31 communicates with the inner space of the inner needle hub 32. The inner needle hub 32 is formed of a substantially cylindrical hollow member.

The method of fixing the inner needle 31 to the inner needle hub 32 includes, for example, a method of fitting, caulking, fusing, bonding with an adhesive, or a combination thereof.

The inner needle hub 32 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured. Thereby, the needle tip 311
When the blood vessel is secured, the flashback of the blood flowing through the inner needle 31 can be visually confirmed.

In the opening at the base end of the inner needle hub 32,
A ventilation filter 321 is provided so as to cover the opening. The ventilation filter 321 has a property of transmitting gas but blocking liquid.

Specific examples of the ventilation filter 321 include various sintered porous bodies, hydrophobic non-woven fabrics, and other porous bodies. In this case, as the sintered porous body, a material obtained by sintering a material containing a polymer material (powder) such as polyethylene and a hydrophilic (water-soluble, water-swellable) polymer is preferable. When this sintered porous body is used, liquid (blood)
Since the airflow is blocked by contact with the air, intrusion of air from the outside can be prevented.

The constituent materials of the outer needle hub 22 and the inner needle hub 32 are not particularly limited, and may be, for example, polyolefin such as polyethylene, polypropylene, polybutadiene, ethylene-vinyl acetate copolymer, polyvinyl chloride, or the like.
Polyester such as polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, polyether ether ketone, etc. Can be

The protector 4 has a protector body 5 formed by deforming (bending) a plate member having elasticity (elasticity), and is attached to the inner needle 31.

The protector 4 has a first posture (movable relative to the inner needle 31 in the axial direction) with respect to the protector 4 (shown in FIGS. 1 and 4). Posture) and a second posture that covers the needle tip 311 of the inner needle 31 and prevents passage of the needle tip 311 (relative movement of the inner needle 31 along the axial direction is prohibited) (FIG. 2 and FIG. 2). (The posture shown in FIG. 5). Hereinafter, the protector 4 will be described.

The protector body 5 of the protector 4 includes a first portion (brake portion) 51 located substantially at the center, a second portion 52 located at the base side (base end side), and a needle tip side (tip end). Side), and a rear connecting portion 5 that connects the other ends of the first portion 51 and the second portion 52 to each other.
4 and a front connection portion 55 that connects one ends of the first portion 51 and the third portion 53 to each other. As a result, the protector body 5 has a substantially S-shape as a whole.

The first portion 51 of the protector body 5 includes:
An approximately circular first hole 41 (hole) is provided,
The second portion 52 is provided with a second hole 42,
The third portion 53 is provided with a third hole (engaging portion) 43. Each of the first hole 41, the second hole 42, and the third hole 43 is a hole through which the inner needle 31 can pass.

In the configuration shown in the drawing, a curved portion 56 that curves inward (toward the base end) is formed at the other end of the third portion 53.

In this embodiment, the protector 4 has a cover 6 that covers such a protector body 5.
The cover portion 6 includes a pair of opposed side wall portions (side plates) 6.
1, 61 and connecting wall 62 connecting both side wall portions 61, 61
It is composed of

The side walls 61 of the cover 6 are arranged substantially perpendicular to the plate-like member forming the protector body 5. That is, both side wall portions 61, 61
Are installed approximately parallel, and a space 6
3 are formed.

In this space 63, the first part 51, the third part 53, the front connection part 55 and the bending part 56 of the protector main body 5 are inserted and housed. That is, the side wall portions 61, 61 cover these portions of the protector body 5 from the side.

The connecting wall 62 of the cover 6 is
The second portion 52 is formed continuously from one end of the second portion 52 so as to bend (or curve) from one end of the second portion 52 and extend substantially in the distal direction. That is, the connecting wall 62 covers the protector main body 5 from one end side. The connecting wall 62 connects one end portions of the side wall portions 61 and 61 and supports them. That is, the cover 6 has a substantially “U” shape in a front view.

By providing such a cover portion 6, when the protector 4 covers the needle tip 311 of the inner needle 31, the blood (body fluid) attached around the needle tip 311 is removed with a finger or the like. Touching can be prevented, and contamination with blood (body fluid) can be more effectively prevented.

In the present invention, the protector 4 may not have the cover 6.

In the assembled state, such protector 4 assumes the first position shown in FIGS. In the first posture, the inner needle 31 is inserted (penetrated) through the first hole 41, the second hole 42, and the third hole 43 of the protector 4.

In the assembled state, the protector 4 is located on the proximal end side (needle base side) of the inner needle 31 (the proximal end of the protector 4 is close to the distal end of the inner needle hub 32). About a half of the distal end side of the protector 4 is located (stored) inside (inside) the outer needle hub 22.

In this assembled state, as described above, the inner needle 31 can move in the proximal direction relative to the protector 4.

In the present embodiment, when the protector 4 is in the first posture, the first portion 51, the second portion 52, and the third portion 53 of the protector body 5 are substantially perpendicular to the inner needle 31, respectively. The rear connecting portion 54 and the front connecting portion 55 are each substantially parallel to the inner needle 31. Thus, in the first posture, the angle formed between the first portion 51 and the rear connection portion 54 is substantially a right angle.

On the other hand, in the natural state of the protector 4 (a state in which no external force is applied), the angle formed between the first portion 51 of the protector body 5 and the rear connection portion 54 is as shown in FIG.
And smaller than the state shown in FIG. That is, the protector 4 is attached to the inner needle 31 in a state where the first portion 51 of the protector body 5 and the rear connection portion 54 are deformed (elastically deformed) so as to open.

With this deformation, the protector 4 is moved to the inner needle 31.
In the mounted state, the first portion 51 of the protector body 5, in a direction such that decreases (angle indicated by theta ₁ in FIG theta ₁ and in FIG. 4 5 ') the inclination angle relative to the inner needle 31 Being energized. In other words, the portion between the first portion 51 and the rear connection portion 54 in the protector body 5 is
The first portion 51 is attached in such a direction that the inclination angle of the first portion 51 with respect to the inner needle 31 (the angle formed between the longitudinal axis direction of the brake portion and the axial direction of the inner needle 31) becomes smaller due to its elasticity. It is an urging means for energizing.

Here, the inclination angle of the first portion 51 with respect to the inner needle 31 can be expressed in two sizes depending on which side of the angle formed by the first portion 51 and the inner needle 31 is selected. However, in the present specification, the “inclination angle of the first portion 51 (brake portion) with respect to the inner needle 31” refers to an angle (smaller angle) that becomes less than 90 ° in the second posture. Shall be. That is, in the present embodiment,
Is the angle indicated by theta ₁ 'of theta in ₁ and 5 in FIG. Hereinafter, this angle is referred to as a “first portion inclination angle”.

The first of the protectors 4 shown in FIGS.
In the posture of the third position 53 of the protector body 5,
When the inner needle 31 penetrates the third hole 43 formed in the inner hole 31 and the third hole 43 and the inner needle 31 are engaged with each other, the first portion inclination angle is generated by the urging force of the urging means. The protector 4 (the protector main body 5) is prevented from being deformed so as to be smaller, and as described above, the first part inclination angle θ ₁ in the first posture is kept substantially at a right angle. In other words, the third hole 43, in the first position, by engagement with the inner needle 31, the engaging portion defining a first site inclination angle theta ₁ at approximately right angles (the tilt defining means) Has become.

The engaging portion is not limited to the through hole such as the third hole 43, but can define the first portion inclination angle by engaging with the inner needle 31 in the first posture. Anything may be used. That is, in addition to the through-hole, the engaging portion is disengaged from the inner needle 31 by, for example, a hook-shaped portion having a part missing in the circumferential direction or a needle tip 311 of the inner needle 31 passing therethrough. It may be a shutter-shaped part that covers the needle tip 311 from the tip side after the operation.

From such an assembled state (the first posture of the protector 4), the inner needle 31 (the inner needle 3 with the hub) is moved in the proximal direction with respect to the protector 4, and the needle tip 311 of the inner needle 31 is moved. Is the third portion 53 of the protector body 5 (the third portion 53
(The hole 43), the engagement between the inner needle 31 and the third hole 43 is released. Thereby, the protector 4 is elastically deformed (displaced) by the urging force of the urging means,
The second posture shown in FIGS. 2 and 5 is taken.

In the second position, the protector 4 has the first portion 51 connected to the rear connecting portion 5 in comparison with the first position.
4 (the inner needle 31) is displaced (deformed) so as to rotate counterclockwise in FIGS. Thus, the first portion inclination angle of is smaller than that in the first position, and has a theta ₁ '<theta ₁ becomes theta _1'.

Accordingly, the third part of the protector body 5
Are also displaced (rotated) with respect to the rear connection portion 54 (the inner needle 31), and the tip of the needle tip 311 of the inner needle 31 is moved to the distal side by the bending portion 56. It is in a state of being covered from. The needle tip 311 of the inner needle 31 is inserted into the space 63.

When the protector 4 is in the second position (needle stowed state), the first portion 51 of the protector body 5 functions as a brake for the inner needle 31, so that the protector 4 is The relative movement of the needle 31 along the longitudinal direction is prohibited (prevented). This braking function is such that the first portion inclination angle becomes smaller than in the first posture by the urging force of the urging means, so that the inner surface of the first hole 41 is pressed against the outer peripheral surface of the inner needle 31, This is exerted by generating or increasing a frictional force between the inner surface (inner peripheral surface) of the first hole 41 and the outer peripheral surface (surface) of the inner needle 31. That is, this frictional force acts on the protector 4 as a braking force, and prohibits (prevents) relative movement of the protector 4 with respect to the inner needle 31 along the longitudinal direction (the longitudinal direction of the inner needle 31).

With such a configuration, once the protector 4 is in the second posture, the needle tip 311 of the inner needle 31 projects beyond the protector 4, or the protector 4 is detached from the inner needle 31 (or detached). Never do. In this way, erroneous piercing can be prevented during disposal processing and the like, and safety is high.

Since the protector 4 is prohibited from moving in the longitudinal direction with respect to the inner needle 31 by the braking action of the first portion 51, the indwelling needle assembly 1 prevents the protector 4 from detaching from the inner needle 31. Special structure (for example, locally increasing the outer diameter of the inner needle 31 or
(A structure in which a convex portion is provided on the outer peripheral portion of the outer needle hub or the outer needle hub 22 and the protector 4 are connected by a string) are not required. Accordingly, it is possible to make the distal end portion of the inner needle 31 have a smooth outer peripheral surface that is not subjected to special processing or the like, which may cause a decrease in strength of the inner needle 31 or an increase in piercing resistance. Absent.

The first portion inclination angle θ ₁ in the first position of the protector 4 is not particularly limited, but is preferably 60 ° or more, and more preferably substantially a right angle as in the present embodiment. The inner diameter D of the first hole 41 is
Although the preferred size varies depending on the outer diameter d of the inner needle 31, it is usually preferably about 0.01 to 1 mm larger than the outer diameter d of the inner needle 31, and more preferably about 0.05 to 0.2 mm larger. preferable.

The first part inclination angle θ in the first posture
₁ and the inner diameter D of the first hole 41 is in the above range, the inner surface of the first hole 41 and the inner needle 3 in the second posture.
The frictional force (braking force acting on the protector 4) between the outer peripheral surface of the protector 4 and the protector 4 is increased, and the relative movement of the protector 4 with respect to the inner needle 31 is more reliably prohibited (blocked).

In the present invention, the first hole 41 of the protector 4 may have a part missing in the circumferential direction (such as a C-shaped member) (the second hole 42 may also be omitted). Similar).

The shape of the second hole 42 and the third hole 43 is not limited to a circular shape as long as the hole can slide with respect to the inner needle 31. From the viewpoint of reducing the sliding resistance in the position described above, it is preferable that the inner diameter D of the first hole 41 is larger by about 0.05 to 1 mm.

Although the preferred value of the thickness of the plate-like member (first portion 51) forming the protector body 5 varies depending on the constituent material thereof, the outer diameter of the inner needle 31, and the like, it is usually 0.1 mm.
It is preferably about 0.5 to 2 mm, and 0.06 to 0.1 mm.
More preferably, it is about 2 mm. In the above range, when the thickness is relatively thick, the braking force acting on the protector 4 in the second posture and the protection of the needle tip 311 are particularly excellent, and when the thickness is relatively thin, Workability and ease of sliding with respect to the inner needle 31 in the first posture are particularly excellent.

The constituent material of the protector 4 is not particularly limited. For example, various metal materials such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, copper or copper-based alloy, polyethylene, polypropylene, polybutadiene, ethylene -Polyolefin such as vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polyester such as polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer,
Various resin materials such as polyacetal, polyphenylene sulfide, and polyether ether ketone are exemplified, and various metal materials are preferable. Further, two or more of the above materials may be used in combination.

The protector 4 is composed of a plurality of members (parts).
Needless to say, it may be constituted by

In the protector 4 of the present embodiment, when the cover 6 is in the second posture,
Has a function of preventing an operation of moving the distal end portion (the third portion 53 and the like) in the distal end direction.

That is, for example, when a pulling force as shown by an arrow A in FIG. 5 is applied to the tip of the protector body 5 (the third portion 53 or the like) with a finger or the like, the tip of the protector body 5 is Since the sides (the third portion 53 and the like) are covered with the side walls 61 and 61 of the cover 6, they cannot be touched with a finger or the like, so that this operation cannot be performed. Can not.

Unlike such a configuration, when the above-described pulling force A can be applied to the distal end portion (the third portion 53 and the like) of the protector main body 5, the pulling force A
Is transmitted to the first portion 31 via the front connection portion 55, and acts so as to increase the _first portion tilt angle θ ₁ ′. Thereby, the frictional force between the inner surface of the first hole 41 and the outer peripheral surface of the inner needle 31 (braking force acting on the protector 4)
May decrease, and the protector 4 may be detached from the inner needle 31.

On the other hand, in the present embodiment, since the protector 4 has the cover 6, the operation of applying an external force such as the pulling force A is hindered. Can be more reliably prevented.

On the other hand, the cover 6 is
Of the protector body 5 by inserting, for example, a rod-like object into the space 63 from the front end side in the second posture, since the front end portion (the third portion 53 and the like) is not covered from the front end side. It is possible (if deliberate) to exert a proximally directed external force on the distal end.

In such a case, that is, when the protector 4 presses the distal end portion (the third portion 53 or the like) of the protector body 5 in the second posture in the proximal direction, the first portion 51 (the first portion 51) is pressed. to the hole 41 near the plate member), having means for the first portion inclined angle theta ₁ of the 'acts a smaller becomes such forces.

That is, when a pressing force as shown by an arrow B in FIG. 5 is applied to the distal end portion (the third portion 53 and the like) of the protector main body 5, the pressing force B is transmitted through the front connecting portion 55. The first portion 51 is transmitted to the first portion 51 to reduce the _first portion tilt angle θ ₁ ′. Thereby, the first
The frictional force (braking force acting on the protector 4) between the inner surface of the hole 41 and the outer peripheral surface of the inner needle 31 further increases to oppose the pressing force B, and the movement of the protector 4 is more reliably prohibited ( Blocking).

Therefore, even if an external force such as the pressing force B acts on the distal end of the protector main body 5, the needle tip 311 is more reliably prevented from protruding beyond the protector 4. High safety. Therefore, in the second posture, the distal end portion of the protector body 5 (the third portion 53).
) Is not a problem even if it is not covered from the front end side by the cover portion 6.

Further, when the protector 4 is in the second position, when an external force in the proximal direction or the distal direction acts on the cover portion 6 in the second position, the inclination angle of the second portion 52 with respect to the inner needle 31 (second (An angle formed between the plate-like member in the vicinity of the hole 42 and the axial direction of the inner needle 31).

That is, for example, when an external force in the direction of the tip acts on the cover 6 by applying a pulling force as shown by an arrow C in FIG. Part 61, the second through the connecting wall 62
And acts to reduce the inclination angle of the second portion 52 with respect to the inner needle 31 (the angle indicated by β in FIG. 5).

Thus, the inner surface of the second hole 42 and the inner needle 3
A frictional force (braking force acting on the protector 4) between the outer peripheral surface and the outer peripheral surface is generated or increased to oppose the tensile force C.
That is, in addition to the first portion 51, the second portion 52 also exerts a braking function for the inner needle 31, and the protector 4
Movement is more reliably prohibited (blocked). In addition, when a pressing force as shown by an arrow E in FIG. 5 is applied to the base end of the protector 4, similarly, the inclination angle β of the second portion 52 with respect to the inner needle 31 is reduced. Act on.

Conversely, for example, when a pressing force as shown by an arrow D in FIG.
Is transmitted to the second portion 52 via the side wall portion 61 and the connecting wall 62, and acts to reduce the inclination angle (the angle indicated by α in FIG. 5) of the second portion 52 with respect to the inner needle 31. .

Thus, the inner surface of the second hole 42 and the inner needle 3
A frictional force (braking force acting on the protector 4) between the outer peripheral surface and the outer peripheral surface of the protector 4 is generated or increased to oppose the pressing force D.
That is, in addition to the first portion 51, the second portion 52 also exerts a braking function for the inner needle 31, and the protector 4
Movement is more reliably prohibited (blocked).

The pressing force D is transmitted from the second portion 52 to the first portion 51 via the rear connecting portion 54,
It also acts so that the first part inclination angle θ ₁ ′ becomes smaller.

Thus, even when an external force acts on the cover 6 in the proximal direction or the distal direction, the needle tip 311 projects beyond the protector 4 or the protector 4 is detached from the inner needle 31. This is more reliably prevented, and the safety is particularly high.

Even if the protector 4 is slightly moved in the proximal direction due to a particularly strong pressing force D, the needle tip 311 is in contact with the inner surface of the curved portion 56, so that the needle tip 3
11 is prevented from projecting beyond the protector 4.

In the indwelling needle assembly 1 of the present embodiment, the connecting means for connecting the protector 4 and the outer needle with hub 2 in the assembled state as described above (hereinafter simply referred to as “connecting means”). have. This connecting means is constituted by a connecting member 7.

As shown in FIG. 3 and FIG.
Is a sheet-shaped member, and a connecting portion 71 having a band shape;
The connecting portion 71 includes an adhesive portion 72 provided to the outer needle 2 with a hub provided on the distal end side, and an adhesive portion 73 provided to the protector 4 provided on the proximal end side of the connecting portion 71.

The bonding portion 72 of the connecting member 7 is
The bonding portion 73 is bonded to the outer surface of the rear connection portion 54 of the protector 4. Thus, in the assembled state, the outer needle 2 with hub and the protector 4
Are connected via a connecting member 7.

The connecting portion 71 of the connecting member 7 has
As shown in FIG. 7, a perforation 74 is formed so as to cross the connecting portion 71 as a break portion that breaks when the protector 4 and the outer needle with hub 2 are separated.

The magnitude of the force required to break the perforation 74 (the force required to release the connection between the outer needle with hub 2 and the protector 4 by the connecting member 7) is equal to the first force of the protector 4. It is set smaller than the sliding (moving) resistance force with respect to the inner needle 31 in the posture 2.

By providing such a connecting member 7, when the inner needle 3 with the hub is moved in the proximal direction relative to the outer needle 2 with the hub from the assembled state of the indwelling needle assembly 1 (the hub). When the inner needle 31 of the attached inner needle 3 is pulled out from the outer needle 21 of the outer needle 2 with hub), the protector 4 remains on the outer needle 2 with hub because it is connected to the outer needle hub 22. That is, the protector 4 relatively moves toward the distal end with respect to the inner needle 31 while maintaining the first posture, and when the needle tip 311 of the inner needle 31 passes through the third hole 43, the The first posture is displaced from the first posture to the second posture that covers the needle tip 311 of the inner needle 31.

As described above, when the protector 4 is in the second posture, the relative movement with respect to the inner needle 31 is prohibited (blocked). Therefore, when the inner needle 3 with the hub is further moved in the proximal direction relative to the outer needle 2 with the hub from the state in which the protector 4 is in the second posture, the operating force (pulling force) of the inner member 3 with the hub is reduced. And the perforations 74 break. Thus, the protector 4 is separated from the outer needle 2 with the hub (the outer needle hub 22), remains at the tip of the inner needle 31, and guards the needle tip 311.

As described above, in the indwelling needle assembly 1, the needle tip 311 of the inner needle 31 is moved by the protector 4 only by moving the inner needle 3 with the hub in the proximal direction relative to the outer needle 2 with the hub. And the protector 4 can be separated from the outer needle 2 with a hub, so that a separate operation for covering the needle tip 311 of the inner needle 31 with the protector 4 is unnecessary. Thus, the needle tip 311 of the inner needle 31 can be covered (stored) very easily and reliably by the protector 4.

Next, an example of a method of using the indwelling needle assembly 1 will be described in detail. [1] With the indwelling needle assembly 1 in an assembled state, the inner needle 31 and the outer needle 21 are punctured into a blood vessel (vein or artery) of a patient while holding the inner needle hub 32 and the like by hand.

[2] When the needle tip 311 of the inner needle 31 is punctured into the blood vessel, the blood is transferred to the inner needle 31 by the internal pressure (blood pressure) of the blood vessel.
The flashback flows backward in the proximal direction, is introduced into the inner needle hub 32, and can be visually recognized through the inner needle hub 32 having visibility. This makes it possible to know that the needle tip 311 of the inner needle 31 has secured a blood vessel.

Note that, with the inflow of blood, the inner needle hub 3
The air in 2 is discharged through the ventilation filter 321, but the blood cannot pass through the ventilation filter 321 and does not leak to the outside.

[3] When the inner needle 31 and the outer needle 21 are further advanced in the distal direction by a small distance, the distal end opening 21 of the outer needle 21 is
1 is inserted into the blood vessel. Thereby, the outer needle 21 secures a blood vessel.

[4] While holding down the outer needle 21 placed in the blood vessel by hand, grasp the inner needle hub 32 with the other hand and pull in the proximal direction. Thereby, the inner needle 31 is withdrawn from the outer needle 21. At this time, since the protector 4 is connected to the outer needle hub 22, it remains on the outer needle 2 with the hub. That is, the protector 4 moves relatively toward the distal end with respect to the inner needle 31.

[5] When the inner needle hub 32 is further pulled in the proximal direction, as described above, the needle tip 311 of the inner needle 31 passes through the third portion 53 of the protector body 5 and the inner needle 31
Is disengaged from the third hole 43. As a result, the protector 4 is elastically deformed (by its own elasticity) and assumes the second posture shown in FIGS.

When the protector 4 is in the second position, the first
By the braking action of the portion 51, the protector 4
Before the needle point 311 passes through the first hole 41, the needle point 311 stops (rests) with respect to the inner needle 31. As a result, the protector 4 is prohibited (prevented) from moving along the longitudinal direction of the inner needle 31, and maintains a state in which the needle tip 311 of the inner needle 31 is covered (stored).

[6] When the inner needle hub 32 is further pulled in the proximal direction from the state where the protector 4 is in the second posture, the pulling force acts on the connecting member 7 and the perforation 7
4 breaks. As a result, the protector 4 is separated from the outer needle 2 with hub (outer needle hub 22) and remains at the tip of the inner needle 31.

Here, in the conventional puncture operation, the inner needle 31 is removed from the living body (outer needle 21) and then the inner needle 31 is covered with a cap. However, the inner needle 31 is inserted into the opening at one end of the cap.
1 is inserted from the needle tip 311 to perform the operation.
If the finger comes off the opening, an accident may occur in which the finger pinching the cap is erroneously stabbed by the tip 311 of the inner needle 31. Also, the operation of putting on the cap described above is
Since the blood flowing out of the outer needle 21 is performed while stopping the blood, the danger is particularly large as compared with the operation of putting a cap with a normal injection needle. However, in the present invention, since the protector 4 automatically moves toward the distal end of the inner needle 31 and covers the needle tip 311 by pulling out the inner needle 31 from the outer needle 21, the erroneous puncture as described above is effectively performed. Can be prevented.

[7] An infusion set connector or the like (not shown) is quickly connected to the outer needle hub 22 of the outer needle 2 with the hub from which the inner needle 31 has been removed, and the administration of the infusion is started according to a standard method. .

After the inner needle 31 is extracted from the outer needle 21 in this manner, the inner needle 3 with a hub becomes unnecessary, and is therefore disposed of.

As described above, the indwelling needle assembly 1
According to this, the needle tip 311 of the inner needle 3 with a hub removed from the outer needle 2 with a hub is stored in the protector 4,
That the needle tip 311 protrudes from the tip of the protector 4,
Since the protector 4 does not come off from the inner needle 31, it is possible to prevent a person who performs disposal processing from accidentally stabbing a finger or the like with the needle tip 311.

<Second Embodiment> FIG. 6 is a longitudinal sectional view showing the vicinity of an outer needle hub in an assembled state of a second embodiment of the indwelling needle assembly of the present invention, and FIG. 7 is an indwelling needle shown in FIG. It is a longitudinal cross-sectional view which shows the state by which the connection state of the protector and the outer needle with a hub was canceled in the assembly. In the following description, the right side in FIGS. 6 and 7 is referred to as “distal end”, the left side is referred to as “base end”, the upper side is referred to as “one end”, and the lower side is referred to as “other end”.

Hereinafter, the second embodiment of the indwelling needle assembly of the present invention will be described with reference to these drawings, but the description will be focused on the differences from the above-described first embodiment, and similar items will be described. Description is omitted.

This embodiment is different from the first embodiment in that
The configuration of the connecting means is different. That is, in the present embodiment,
As a connecting means, the outer needle hub 22 is provided with a projection 221 (an engagement portion) with which a part of the protector 4 can be engaged.

That is, inside the outer needle hub 22, FIG.
A projection 221 projecting from the middle and lower side toward the inner needle 31 is provided. In the illustrated configuration, the protrusion 221 is formed by a short side of an L-shaped plate-like member fixed to the inner surface of the outer needle hub 22.

The locking portion with which a part of the protector 4 can be engaged is not limited to a convex portion such as the protrusion 221, but may be a concave portion (hole) formed on the wall surface of the outer needle hub 22. Any material can be used as long as a part of the member 4 can be engaged. Further, the formation location is not limited to the illustrated configuration.

As shown in FIG. 6, the other end of the third portion 53 of the protector main body 5 has the protrusion 22 in the first position of the protector 4 (in an assembled state of the indwelling needle assembly).
1 is located on the tip side.

From the assembled state, when the inner needle 3 with the hub is moved in the proximal direction relative to the outer needle 2 with the hub (the inner needle 31 of the inner needle 3 with the hub is moved from the outer needle 21 of the outer needle 2 with the hub). When the protector 4 is pulled out), the other end of the third portion 53 abuts on the distal end side of the protrusion 221 to maintain the connected state with the outer needle hub 22 and remains in the outer needle 2 with the hub. I do. Accordingly, the protector 4 moves relatively toward the distal end with respect to the inner needle 31 while maintaining the first posture, and when the needle tip 311 of the inner needle 31 passes through the third hole 43, The first posture is displaced from the first posture to the second posture that covers the needle tip 311 of the inner needle 31.

When the protector 4 is in the second position, as described above, the third portion 53 of the protector body 5 is displaced so as to rotate counterclockwise in FIG. Thereby, as shown in FIG. 7, the engagement of the third portion 53 with the projection 221 is released. Therefore, protector 4 is
At about the same time, the connection between the outer needle with hub 2 and the protector 4 is released, and the inner needle with hub 3 is further moved in the proximal direction relative to the outer needle 2 with hub from that state. Then, the protector 4 separates from the outer needle hub 22.

As described above, in the present embodiment, since the releasing operation of the connection state between the outer needle with hub 2 and the protector 4 is performed by the restoring force (elastic force) of the protector 4 (the protector body 5) itself, the hub with the hub is provided. Little force is required to release the connection between the outer needle 2 and the protector 4. Therefore, the operability is higher, and the needle tip 311 of the inner needle 31 can be more easily and reliably covered with the protector 4.

In this embodiment, the entire protector 4 is housed inside the outer needle hub 22 in the assembled state. Thereby, further miniaturization of the entire indwelling needle assembly can be achieved.

<Third Embodiment> FIG. 8 is a side view showing the vicinity of an outer needle hub in an assembled state of a third embodiment of the indwelling needle assembly of the present invention, and FIG. 9 is an indwelling needle assembly shown in FIG. It is a side view which shows the state by which the connection state of the protector and the outer needle with a hub was cancelled | released in three-dimensional. In the following description, the right side in FIGS. 8 and 9 is referred to as “distal end”, and the left side is referred to as “base end”.

Hereinafter, the third embodiment of the indwelling needle assembly of the present invention will be described with reference to these drawings, but the description will focus on the differences from the first embodiment described above, and the same items will be described. Description is omitted.

The present embodiment differs from the first embodiment in that:
The configuration of the connecting means is different. That is, in the present embodiment,
As a connecting means, a connecting member 8 mounted on the proximal end side of the outer needle hub 22 is provided.

The connecting member 8 is formed by deforming (working) a plate-like member having elasticity (elasticity), and has a protector 4 having a central portion formed with a hole through which the inner needle 31 is inserted. And a pair of arms 8 formed so as to protrude in the distal direction from both ends of the contact portion 81.
2 and 82, and contact portions 83 and 83 to the outer needle hub provided on the distal ends of the arms 82 and 82, respectively.

In the assembled state, the entire protector 4 is housed inside the outer needle hub 22. Further, a part of the contact portion 81 of the connecting member 8 also enters the inside of the outer needle hub 22 and contacts the base end of the protector 4.

From both ends of the contact portion 81, the arms 82, 8
2 extend distally beyond a flange 222 formed on the outer periphery of the proximal end of the outer needle hub 22. Portions of the arms 82 and 82 beyond the flange 222 (tip side)
Is formed to be inclined inward so as to approach the outer needle hub 22.

The contact portions 83, 83 have a curved shape corresponding to the shape of the outer peripheral surface of the outer needle hub 22. These contact portions 83, 83 are held by the outer needle hub 2 so as to sandwich the outer needle hub 22 by the elasticity of the arms 82, 82, respectively.
2 is pressed. Thereby, the contact portions 83, 83
And a frictional force acts between the outer needle hub 22 and the outer peripheral surface of the outer needle hub 22.

The constituent material of the connecting member 8 is not particularly limited, and for example, those listed as constituent materials of the protector 4 can be used.

With such a configuration, as shown in FIG. 8, the outer needle with hub 2 and the protector 4 are connected by the connecting member 8 in the assembled state.

When the inner needle 3 with hub is moved in the proximal direction relative to the outer needle 2 with hub from the assembled state (the inner needle 31 of the inner needle 3 with hub is pulled out from the outer needle 21 of the outer needle 2 with hub). ), Since the protector 4 is connected to the outer needle hub 22, the protector 4 remains toward the outer needle 2 with the hub. That is, the protector 4 relatively moves toward the distal end with respect to the inner needle 31 while maintaining the first posture, and when the needle tip 311 of the inner needle 31 passes through the third hole 43, the The first posture is displaced from the first posture to the second posture that covers the needle tip 311 of the inner needle 31.

When the protector 4 is in the second posture, the relative movement with respect to the inner needle 31 is prohibited (blocked) as described above. From this state, the inner needle with hub 3
Is moved in the proximal direction relative to the outer needle 2 with a hub, the operating force (pulling force) is transmitted from the inner needle 31 to the connecting member 8 via the protector 4, and the connecting member 8 is connected to the outer needle hub. 22. This allows
The flange 222 of the outer needle hub 22 is connected to the arm 8 of the connecting member 8.
The inner surfaces of the inclined portions 2 and 82 are pressed to spread them outward, and the arms 82 and 82 are deformed so as to open, and the connecting member 8 is separated from the outer needle hub 22. Then, as shown in FIG. 9, the protector 4 includes the outer needle 2 with a hub (the outer needle hub 2).
Separate from 2).

In this embodiment, the entire protector 4 is housed inside the outer needle hub 22 in the assembled state. Thereby, further miniaturization of the entire indwelling needle assembly can be achieved.

Although the indwelling needle assembly according to the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to these embodiments, and the components constituting the indwelling needle assembly exhibit similar functions. Any configuration that can be used can be substituted.

For example, the protector body is not limited to a substantially S-shaped overall shape, but may be, for example, a substantially “U” -shaped one.

The protector body may be constituted by a plurality of parts. For example, the plate-shaped brake unit and an urging member (spring) that urges the brake unit in a direction in which the inclination angle with respect to the inner needle is reduced may be configured as separate components.

The connecting member for connecting the outer needle with hub and the protector may be constituted by a plurality of parts. For example, a combination of the connection member of the first embodiment and the connection member of the third embodiment may be used.

Further, the connecting means for connecting the outer needle with hub and the protector is not limited to the configuration shown in the figure.
The protector may be configured such that both are connected by simply fitting or screwing the protector inside the outer needle hub.

[0134]

As described above, according to the present invention, the needle tip of the inner needle after use can be covered with the protector quickly and safely by a simple operation, and it can be erroneously used for disposal processing or the like. It is possible to provide an indwelling needle assembly that is extremely excellent in hygiene and safety without causing an accident of piercing a finger or the like with the needle tip.

In particular, the above-mentioned effect can be achieved with a simple structure and a very small protector, and the protector can be accommodated in a small space at the base of the inner needle in an assembled state. Therefore, an operational feeling comparable to that of a conventional indwelling needle assembly having no protector is obtained, and high operability is obtained.

Further, by providing the connecting means, the needle tip of the inner needle can be more reliably covered with the protector with a simpler operation, and safety and operability can be further improved. Also, there is no increase in size due to the provision of the connecting means.

Processing for preventing the protector from detaching from the inner needle (forming a concave portion or a convex portion, etc.)
Is unnecessary. Accordingly, the distal end portion of the inner needle can have a smooth outer peripheral surface, which does not cause a decrease in the strength of the inner needle, an increase in piercing resistance, and the like, and is easy to manufacture.

When a cover is provided to cover the protector body, it is possible to more reliably prevent the needle tip of the inner needle from protruding beyond the protector and the protector from being detached from the inner needle. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment (assembled state) of an indwelling needle assembly according to the present invention.

FIG. 2 is a longitudinal sectional view showing a first embodiment (in a state where a protector covers the needle tip of an inner needle) when the puncture device of the present invention is applied to an indwelling needle assembly.

FIG. 3 is a view taken along line XX in FIG. 1;

FIG. 4 is an enlarged longitudinal sectional view showing a portion near a protector of FIG. 1;

FIG. 5 is an enlarged longitudinal sectional view showing a portion near a protector in FIG. 2;

FIG. 6 is a longitudinal sectional view showing the vicinity of an outer needle hub in an assembled state of a second embodiment of the indwelling needle assembly of the present invention.

FIG. 7 is a longitudinal sectional view showing a state where a connection state between the protector and the outer needle with a hub is released in the indwelling needle assembly shown in FIG. 6;

FIG. 8 is a side view showing the vicinity of an outer needle hub in an assembled state of a third embodiment of the indwelling needle assembly of the present invention.

FIG. 9 is a side view showing a state where the connection state between the protector and the outer needle with a hub is released in the indwelling needle assembly shown in FIG. 8;

[Explanation of symbols]

 Reference Signs List 1 indwelling needle assembly 2 outer needle with hub 21 outer needle 211 tip opening 22 outer needle hub 221 protrusion 222 flange 3 inner needle with hub 31 inner needle 311 needle tip 32 inner needle hub 321 ventilation filter 4 protector 41 first hole 42 2nd hole 43 3rd hole 5 Protector main body 51 1st part 52 2nd part 53 3rd part 54 Back connection part 55 Front connection part 56 Curved part 6 Cover part 61 Side wall part 62 Connection wall 63 Space 7 Connecting member 71 Connecting part 72, 73 Bonding part 74 Perforation 8 Connecting member 81 Contact part 82 Arm part 83 Contact part

Claims (7)

[Claims] An inner needle having a sharp needle tip at a distal end thereof; an inner needle hub installed at a base end side of the inner needle; a hollow outer needle into which the inner needle can be inserted; An outer needle hub installed on the proximal end side, a protector attached to the inner needle and movable in the axial direction of the inner needle, and a connecting means for connecting the outer needle hub and the protector. In the indwelling needle assembly, the protector has at least one brake portion formed with a hole through which the inner needle can pass, and from a first posture movable in an axial direction of the inner needle, In a state where the inner needle is covered with the needle tip, the inner needle is deformed to a second posture in which the movement of the inner needle in the axial direction is restricted, and the brake unit is configured to perform the brake when in the second posture. The angle formed between the longitudinal axis direction of the portion and the axial direction of the inner needle is greater than in the first posture. By reducing, the frictional force between the inner peripheral surface of the hole and the surface of the inner needle is generated or increased, and the movement of the protector in the axial direction of the inner needle is regulated. The indwelling needle assembly is characterized in that the connection between the outer needle hub and the protector is released by deforming the protector to the second posture. 2. The urging means for urging the brake unit such that an angle formed between a longitudinal axis direction of the brake unit and an axial direction of the inner needle is reduced, and A tilt defining means for defining the inclination of the brake unit with respect to the inner needle when in the posture, and when the tip of the inner needle is moved, the regulation by the tilt defining means is released, whereby the first The indwelling needle assembly according to claim 1, wherein the indwelling needle assembly is configured to be changed from the posture to the second posture. 3. The protector is formed by deforming a plate member having elasticity, the hole, a second hole through which the inner needle can penetrate, and a needle tip side with respect to the hole and the second hole. A protector body having an engagement portion for the inner needle formed in the protector, wherein the protector, when in the first posture, the inner needle penetrates the hole and the second hole, The engagement portion is engaged with the inner needle, and from that state, the distal end moves relative to the inner needle to disengage the engagement between the engagement portion and the inner needle, The indwelling needle assembly according to claim 1, wherein the indwelling needle assembly is configured to be elastically deformed to change from the first posture to the second posture. 4. The protector body has a substantially S-shape as a whole, the hole is formed at a substantially central portion of the protector body, and the second hole is formed at a needle base of the protector body. The indwelling needle assembly according to claim 3, which is formed on the side. 5. The protector includes a cover portion that covers at least a part of the protector main body, and when an external force in a proximal direction and / or a distal direction is applied to the cover portion in the second posture, the protector includes a cover. Means for applying a force to the plate-like member near the second hole to reduce an angle formed between the plate-like member near the second hole and the axial direction of the inner needle; 5. The indwelling needle assembly according to claim 3, wherein the cover has a function of preventing an operation of moving the distal end of the protector body in the distal direction in the second posture. 6. The indwelling needle assembly according to claim 1, wherein the connecting means has a break portion that breaks when the protector and the outer needle hub are separated. 7. The connecting means is provided on the outer needle hub, and is constituted by a locking portion with which a part of the protector can be engaged, and the protector moves from the first position to the second position. 2. The engagement is released by deformation.
6. The indwelling needle assembly according to any one of claims 5 to 5.