WO2023039744A1

WO2023039744A1 - Blood sampling needle holder having swinging covering device

Info

Publication number: WO2023039744A1
Application number: PCT/CN2021/118475
Authority: WO
Inventors: 陈永曦
Original assignee: 福州康利特医疗器械有限公司
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2023-03-23

Abstract

A blood sampling needle holder having a swinging covering device, comprising a needle holder holding cylinder (1), and further comprising a swinging covering safety device. The swinging covering safety device comprises a connecting device capable of connecting the swinging covering safety device to the needle holder holding cylinder (1), and a swinging covering body; the swinging covering body comprises a shielding cover (2.2) used for covering a used blood sampling needle head, and a mounting base (2.1) used for mounting the shielding cover; the connecting device is disposed on the mounting base (2.1); the shielding cover (2.2) is hinged to the mounting base (2.1) in a swinging manner; and the shielding cover (2.2) covers the blood sampling needle head when the needle head is exposed. By means of simple and ingenious structural design, after blood sampling is completed, the blood sampling needle head can be shielded by means of a simple operation, thereby avoiding accidental injury to an operator or subsequent sanitary treatment personnel caused by exposure of a blood sampling needle.

Description

Blood collection needle holder with swivel cover

technical field

The invention relates to a blood collection needle, in particular to a blood collection needle with a swing cover device.

Background technique

The blood collection device is composed of three parts: blood collection tube, blood collection needle and needle holder. In use, the operator holds the blood collection needle tube and punctures the needle of the blood collection needle into the skin to cause minimal trauma. After the blood collection needle is pulled out, the needle of the blood collection needle will be exposed for a period of time, which may cause pollution or accidentally stab the human body. In response to this situation, various protective covers for blood collection needles and storage devices for blood collection needles have been developed to solve the problem of exposed blood collection needles.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of the prior art, and provide a simple, safe and reliable blood collection needle holder with a swing cover device that can well cover the exposed needle head of the blood collection needle.

A needle holder for blood collection needles with a swing cover device, which includes a needle holder and a needle cylinder. The key point of its structure is that it also includes a swing cover safety device. The device is connected to the connecting device and the swing covering body on the needle holder cylinder, the swing covering body includes a shielding cover for covering the used blood collection needle needle and a mounting seat for installing the shielding cover, the connecting device It is arranged on the mounting seat, and the shielding cover is swingably hinged on the mounting seat, and the shielding cover covers the outside of the needle when the needle of the blood collection needle is exposed.

In the present invention, a swing cover safety device is provided, and the swing cover safety device is installed on the needle-holding barrel of the needle holder during use, and when acupuncture is completed, the cover is covered outside the needle head to realize the cover of the needle head.

A driving device for driving the movement of the shielding cover is also arranged on the blood collection needle holder.

The drive mechanism is provided to conveniently control the movement of the shielding cover.

The driving device is either a gear transmission mechanism or a connecting rod drive.

The gear transmission mechanism includes a rack and pinion mechanism.

The gear transmission mechanism specifically includes a rack and a gear, the rack extends along the axis of the needle holder cylinder, and a slideway for the rack to perform linear reciprocating motion is provided on the mounting base. , the slideway extends along the barrel direction of the needle holder barrel, and the mounting seat at the end of the needle holder barrel for installing the blood collection needle is provided with a shielding cover installation shaft hole and a transition gear shaft There are gears on the shielding cover, the shielding cover is installed on the shielding cover installation shaft hole of the mounting seat through the gear shaft, the filter gear is mounted on the transition gear shaft hole of the mounting seat, and the gear meshes with the transition gear and transitions The gear is meshed with the rack, and the rack is pushed to drive the cover to move towards the direction of the blood collection needle.

When in use, by pushing the rack, the rack drives the transition gear meshed with it to rotate, and the filter gear drives the gear meshed with it to rotate, and the rotating gear drives the shielding cover to swing in the direction in which the rack moves, so as to achieve Covering of lancets.

The slideway on the mounting base is composed of two groove-shaped bodies arranged opposite to each other. The upper surface of the slideway groove-shaped body is provided with a stop convex card, and the lower surface of the control end of the rack is provided with a stopper on the slideway groove-shaped body. The stop protrusion card on the surface is used in conjunction with the limit protrusion card.

When the blood collection is completed, the blood collection needle is withdrawn from the patient's blood vessel. At this time, the puncture needle tube is exposed outside the needle holder. At this time, the rack is controlled to swing and cover the safety device. The rack slips, and the sliding rack drives the gear meshed with it to rotate. , the rotating gear drives the meshing gear to rotate, and the rotating gear drives the shield cover to rotate, so that the shield cover gradually swings towards the exposed puncture needle tube, when the rack slides to the limit convex card and the slide rail groove under the operating end The stop convex clips on the upper surface of the shape body are engaged with each other, and cannot be pushed further, so that the rack can no longer be pushed. At this time, the swing shielding cover completely covers the puncture needle tube, so that the purpose of safely covering the blood-stained puncture needle tube is achieved.

The gear transmission mechanism specifically includes a rack and a gear, the rack extends along the axis of the needle holder cylinder, and a slideway for the rack to perform linear reciprocating motion is provided on the mounting base. , the slideway extends along the barrel direction of the needle holder cylinder, and the mounting seat at the end of the needle holder cylinder for installing the blood collection needle is provided with a shielding cover installation shaft hole, and the shielding cover A gear is arranged on the top, and the shielding cover is installed on the shielding cover installation shaft hole of the mounting base through the gear shaft. The gear meshes with the rack, and pulling the rack drives the shielding cover to move towards the direction of the blood collection needle.

When in use, by pulling the rack, the rack drives the gear meshed with it to rotate, and the rotating gear drives the shielding cover to swing in the direction in which the rack moves, thereby realizing the shielding of the blood collection needle.

The slideway on the mounting seat is composed of two groove-shaped bodies arranged opposite to each other. A stop positioning surface is arranged at the end of the groove-like body, and elastic stop convex cards are arranged on both sides of the rack. A positioning surface is provided.

When in use, by pushing and pulling the rack, the movement of the rack can be limited when the elastic stop protrusion on the rack catches the positioning surface at the end of the groove-shaped body.

The gear modulus ratio of the gear and the rack is 0.3-2.0.

The gear is an incomplete gear.

When the rack just meshes with the transition gear and reaches the end, the rack can no longer be pushed, and the forward direction of the rack is restricted. The stop protrusions are engaged with each other, and the rack cannot move backwards, that is, the rack cannot move forward or backward at this time. At this time, the swing cover completely covers the puncture needle tube, and the swing cover can rotate in the opposite direction.

The shielding cover is arranged as a groove-like structure on the side used to cover the blood collection needle.

The outward facing end of the shielding cover groove structure is closed.

The shielding cover with closed end can play a better protective role.

A convenient handle is provided at the operating end of the rack.

The bottom of the slideway of the mounting seat is provided with an elastic convex card for assembly and positioning, a positioning surface is provided on the elastic convex card, and a positioning surface matched with the elastic convex card is provided at the operating end of the rack to realize assembly. accurate positioning.

The connecting device may be a loop structure, and the loop can be set on the needle holder barrel of the needle holder.

The connecting device can also be an elastic collar.

The connection will be set as a thin-walled collar, and the thin-walled collar is closely matched with the needle holder cylinder, and a plurality of inner hook-type retaining cards are arranged on the outer end of the thin-walled collar. The card is in conflict with the end face of the needle holder barrel.

The connection device or the connection lug provided for it, the swing cover safety device is hung on the needle holder barrel of the needle holder through the connection lug.

The needle holding cylinder of the needle holder is a rotating thin-wall cylinder, one end is open, and the other end is semi-closed. There is an annular protrusion outside the cylinder at the semi-closed end, and there is a screw-connected lancet at the center of the closed end. Internal screw holes.

In summary, compared with the prior art, the present invention has the following advantages:

Through the simple and ingenious structural design of the present invention, after the blood collection is completed, the needle of the blood collection needle can be shielded through simple operations, so as to avoid accidentally injuring the operator or subsequent sanitation personnel caused by the exposure of the blood collection needle.

Description of drawings

Fig. 1 is a schematic structural view of a needle holder for a blood collection needle according to Embodiment 1 of the present invention.

FIG. 2 is a schematic cross-sectional view of FIG. 1 .

Fig. 3 is a schematic diagram of the structure of the needle holder.

FIG. 4 is a schematic cross-sectional view of FIG. 3 .

FIG. 5 is a schematic diagram of the mounting seat of the swing cover device in Embodiment 1. FIG.

Fig. 6 is a schematic diagram of the swing covering body of the present invention.

FIG. 7 is a schematic diagram of the rack structure of Embodiment 1. FIG.

FIG. 8 is another perspective view of FIG. 7 .

Fig. 9 is a schematic view of the use state of the blood collection needle holder with the swing cover device.

Fig. 10 is a schematic diagram of a use state where the shielding cover is in a shielding state.

FIG. 11 is a sectional view of FIG. 10 .

Fig. 12 is a structural view of the blood collection needle holder of the second embodiment.

FIG. 13 is a schematic cross-sectional view of FIG. 11 .

Fig. 14 is a schematic view of the swing cover installation seat of the second embodiment.

Fig. 15 is a schematic diagram of the swing cover body in Embodiment 2.

Fig. 16 is a schematic diagram of the structure of the rack in the second embodiment.

FIG. 17 is another perspective view of FIG. 16 .

Fig. 18 is a schematic diagram of the use state of the second embodiment.

Fig. 19 is a schematic view of the use state of the shielding cover of the second embodiment in a shielding state.

FIG. 20 is a sectional view of FIG. 19 .

Detailed ways

The present invention will be described in more detail below in conjunction with examples.

Example 1

A blood collection needle holder with a swing cover device, comprising a needle holder and a needle holder, and a swing cover safety device, the swing cover safety device includes a device that can connect the swing cover safety device to the needle holder The connecting device and the swing cover on the holding needle barrel, the swing cover includes a cover for covering the needle of the blood collection needle after use and a mounting seat for installing the cover, the connecting device is arranged on the mounting seat , the shielding cover is swingably hinged on the installation seat, and the shielding cover covers the outside of the needle when the needle of the blood collection needle is exposed. A driving device for driving the movement of the shielding cover is also arranged on the blood collection needle holder. The driving device is a gear transmission mechanism, and the gear transmission mechanism specifically includes a rack and a gear, the rack extends along the axis of the needle holder cylinder, and the mounting seat is provided with The slideway for linear reciprocating motion of the rack, the slideway extends along the direction of the cylinder of the needle holder, and is set on the mounting seat at the end of the needle holder cylinder for installing the blood collection needle There is a shielding cover installation shaft hole and a transition gear shaft hole. An incomplete gear is arranged on the shielding cover. The shielding cover is installed on the shielding cover installation shaft hole of the mounting seat through the incomplete gear shaft, and the filter gear is installed on the transition gear of the mounting seat. On the shaft hole, the incomplete gear meshes with the transition gear, and the transition gear meshes with the rack, and the rack drives the shielding cover to move toward the blood collection needle.

Hold the syringe 1 as shown in Figure 3 and Figure 4

The needle holder body 1.1 is a rotary thin-walled cylinder, one end is open, and the other end is semi-closed. There is an annular convex card 1.1.1 outside the semi-closed end cylinder, and an inner hole that can be rotated to connect the blood collection needle is arranged in the center of the closed end. Screw hole 1.1.2; Symmetrical buckle 1.2 is arranged on the outer side of the cylinder at the open end of the rotary cylinder.

The mounting seat 2.1 of the swing cover device is shown in Figure 5,

It is composed of a thin-walled collar 2.1.1 and a component mounting seat 2.1.2 fixedly connected to the outer side of the thin-walled collar. One end of the thin-walled collar 2.1.1 is provided with a plurality of internal hook-type stoppers 2.1.1.1, the thin-walled collar is tightly socketed with the needle holder, and the end face of the stopper and the annular convex card 1.1 on the needle holder are provided. 1-phase fastening, the inner hook-type stopper is in conflict with the semi-closed end face of the needle holder, forming a firm clamping connection. The component mounting seat 2.1.2 is provided with a chute 2.1.2.5 at both ends of the flat circular arc bottom. The side is provided with a symmetrical support plate, 2.1.2.1, the support plate is provided with a symmetrical swing cover semi-closed shaft hole 2.1.2.2, and a symmetrical rotating transition gear shaft hole 2.1.2.3 is provided at a certain distance, and a symmetrical stop is provided on the surface of the ring groove. The movable convex card 2.1.2.4 is provided with elastic convex card 2.1.2.6 at the bottom of the chute.

Swing cover 2.2 as shown in Figure 6

The swing cover 2.2 is an elongated stepped thin-walled cover 2.2.1, the small end is closed, the large end is open, the swing shaft 2.2.2 is arranged inside the big end, and the transmission gear 2.2.3 is provided with a non-complete turn on the swing shaft

Rack as shown in Figure 7, 8

The rack 2.3 is composed of a push plate 2.3.1 and a handle 2.3.2. The drive rack 2.3.1.1 is arranged on the push plate, an assembly positioning surface 2.3.2.1 is arranged under the push handle, and stop protrusions are arranged on both sides below the push handle. Card 2.3.2.2.

Assembly of Example 1

First, insert the rack 2.3 into the upper chute 2.1.2.5 of the device mounting seat 2.1, and push it to the bottom of the rack upper push handle 2.3.2 to assemble the positioning surface 2.3.2.1 with the vertical surface of the elastic convex card 2.1.2.6 at the bottom of the device mounting seat. Touch, then install the rotating transition gear 2.4 into the gear shaft hole 2.1.2.3 on the symmetrical support plate on both sides of the chute body of the device mounting seat, the transition gear is meshed with the transmission rack 2.3.1.1 on the rack, and then the swing is covered 2.2 With the cover facing the rack, press the upper swing shaft 2.2.2 of the cover into the semi-closed shaft hole 2.1.2.2 of the swing cover on the symmetrical support plate on both sides of the chute body of the installation seat of the device, and adjust the swing cover’s swing shaft to make no full circle The end teeth of the transmission gear 2.2.3 mesh with the transition gear, and the angle between the swing cover and the rack surface is less than 90 degrees. Finally, the end of the thin-walled collar 2.1.1 on the swing cover safety device without a card is inserted into the needle holder 1. The upper semi-closed end is forcibly inserted into the outer end of the needle holder, the thin-walled collar climbs over the annular convex card 1.1.1 on the needle holder, and reaches the inner hook stopper 2.1.1.1 on the thin-walled collar and the needle holder The upper semi-closed end surface touches, and at the same time, the end surface of the thin-walled collar also engages with the vertical surface of the annular convex card on the needle holder, so that the swing covering safety device will not come out of the needle holder, and the assembly is completed.

Before collecting the patient's blood, insert the pen-type vacuum blood collection needle into the inner thread hole 1.1.2 of the upper semi-closed end of the needle holder, and rely on the outer thread on the blood collection needle and the inner thread of the upper semi-closed end of the needle holder to tighten . After that, the patient's blood vessel can be punctured. After the puncture is successful, a vacuum blood collection tube is inserted from the open end of the needle holder for blood collection. After the blood collection is finished, hold the needle holder and withdraw the blood collection needle from the patient's blood vessel. At this time, the puncture needle tube is exposed outside the needle holder. Immediately, the index finger pushes the rack upper pusher 2.3.2 that swings and covers the safety device, and the rack slides. The upper rack drives the rotating transition gear to mesh and rotate, and the rotating transition gear drives the swing cover upper transmission gear 2.2.3 to rotate towards the sliding direction of the push plate, the swing cover gradually swings towards the exposed puncture needle tube, and the rack slides to its upper push plate 2.3.2.2 Stop convex cards on both sides below the push handle 2.3.2.2 Climb over the stop convex cards 2.1.2.4 on the body surface of the chute of the device mounting seat, 2.3.2.2 Stop convex cards on the vertical surface and the body surface of the chute on the push handle 2.1.2.4 The vertical surface is stuck. At this time, the rack on the push plate just meshes with the rotating transition gear and reaches the end, and it cannot be pushed any further. In this way, the advance and retreat of the rack is restricted. At this time, the swing cover completely covers the puncture needle tube, swinging It is also okay to cover the reverse direction, so that the purpose of safely covering the bloody puncture needle tube is achieved.

The parts not described in this embodiment are the same as the prior art.

Example 2

In this embodiment, the rack is a rear-pull scheme. It is almost the same as the push-forward structure of embodiment 1, and has a needle holder and a swing cover safety device, but the rear pull-type safety device is provided with less rotating transition gears, and the rack is pushed to the front end during assembly.

After the blood collection is over, the index finger buckles the push plate to buckle the hand, slides backwards, and drives the swing to cover the puncture needle tube. The stop convex card 2.3.2.2 on the push plate is changed to two The side elastic stop convex card, after the masking is completed, the push plate is all locked to limit slippage.

The parts not described in the present invention are basically the same as those in Embodiment 1, wherein the gear transmission mechanism specifically includes a rack and a gear, and the rack extends along the axis of the needle cylinder of the needle holder, and is set on the mounting base. There is a slideway for the linear reciprocating motion of the rack, and the slideway extends along the direction of the barrel of the needle holder, on the mounting seat at the end of the needle holder barrel for installing the blood collection needle A shielding cover installation shaft hole is provided, and an incomplete gear is arranged on the shielding cover. The shielding cover is installed on the shielding cover installation shaft hole of the mounting seat through the gear shaft. The gear meshes with the rack, and the rack is pulled to drive the shielding cover. Move in the direction of the lancet.

The parts not described in this embodiment are the same as those in Embodiment 1.

Claims

A blood collection needle holder with a swing cover device, which includes a needle holder and a needle holder, and is characterized in that it also includes a swing cover safety device, and the swing cover safety device includes a swing cover safety device. The connecting device connected to the needle holding cylinder of the needle holder and the swing cover body, the swing cover body includes a cover cover for covering the used blood collection needle needle and a mounting seat for installing the cover cover, the connection device is set On the mounting base, the shielding cover is swingably hinged on the mounting base, and the shielding cover covers the outside of the needle when the needle of the blood collection needle is exposed.
A blood collection needle holder with a swing cover device according to claim 1, characterized in that: a driving device for driving the movement of the cover is also arranged on the blood collection needle holder.
A blood collection needle holder with a swing cover device according to claim 2, characterized in that: the driving device is a gear transmission mechanism, and the gear transmission mechanism specifically includes a rack and a gear , the rack extends along the axis of the needle holder cylinder, and a slideway for the rack to reciprocate in a straight line is provided on the mounting seat, and the slideway is along the axis of the needle holder cylinder. The barrel body extends in the direction of the needle holder. On the mounting seat at the end of the needle holder holding the needle cylinder for installing the blood collection needle, a shielding cover installation shaft hole and a transition gear shaft hole are arranged. A gear is arranged on the shielding cover, and the shielding cover passes through the gear shaft. Installed on the shaft hole of the shielding cover of the mounting seat, the filter gear is mounted on the transition gear shaft hole of the mounting seat, the gear meshes with the transition gear, and the transition gear meshes with the rack, pushing the rack to drive the shielding cover towards the blood collection needle direction of movement.
A blood collection needle holder with a swing cover device according to claim 3, characterized in that: the slideway on the mounting seat is composed of two groove-shaped bodies arranged opposite to each other, and on the slideway groove-shaped body The surface is provided with a stop convex card, and the lower surface of the control end of the rack is provided with a limit convex card used in cooperation with the stop convex card on the upper surface of the slideway groove body.
A blood collection needle holder with a swing cover device according to claim 2, characterized in that: the driving device is a gear transmission mechanism, and the gear transmission mechanism specifically includes a rack and a gear , the rack extends along the axis of the needle holder cylinder, and a slideway for the rack to reciprocate in a straight line is provided on the mounting seat, and the slideway is along the axis of the needle holder cylinder. The barrel body extends in the direction of the needle holder, and a shielding cover installation shaft hole is provided on the mounting seat at the end of the needle holder holding the needle cylinder for installing the blood collection needle. A gear is arranged on the shielding cover, and the shielding cover is installed on the mounting seat through the gear shaft. The shielding cover is installed on the shaft hole, the gear meshes with the rack, and pulling the rack drives the shielding cover to move towards the blood collection needle.
A blood collection needle holder with a swing cover device according to claim 5, characterized in that: the slideway on the mounting seat is composed of two groove-shaped bodies arranged opposite to each other, and the ends of the groove-shaped bodies are arranged The stop positioning surface is provided with elastic stop convex cards on both sides of the rack, and the elastic stop convex cards are provided with a positioning surface.
A needle holder for blood collection needles with a swing cover device according to claim 4 or 6, characterized in that: the tooth modulus ratio of the gear and the rack is 0.3-2.0.
A blood collection needle holder with a swing cover device according to claim 7, characterized in that: said gear is an incomplete gear.
A blood collection needle holder with a swinging cover device according to claim 8, characterized in that: said cover is arranged as a groove-like structure on the side for covering the blood collection needle.
A blood collection needle holder with a swing cover device according to claim 9, characterized in that: an elastic convex card for assembly and positioning is provided at the bottom of the slideway of the mounting seat, and a As for the positioning surface, the operating end of the rack is provided with a positioning surface matched with the elastic convex card to realize accurate positioning during assembly.