WO2023279292A1 - 新型末梢采血针及其加工方法 - Google Patents
新型末梢采血针及其加工方法 Download PDFInfo
- Publication number
- WO2023279292A1 WO2023279292A1 PCT/CN2021/105009 CN2021105009W WO2023279292A1 WO 2023279292 A1 WO2023279292 A1 WO 2023279292A1 CN 2021105009 W CN2021105009 W CN 2021105009W WO 2023279292 A1 WO2023279292 A1 WO 2023279292A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle
- sliding sleeve
- outer sleeve
- trigger sliding
- blood collection
- Prior art date
Links
- 210000005259 peripheral blood Anatomy 0.000 title claims abstract description 30
- 239000011886 peripheral blood Substances 0.000 title claims abstract description 30
- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 28
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 31
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims 1
- 210000004369 blood Anatomy 0.000 description 7
- 239000008280 blood Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000004323 axial length Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
Definitions
- the invention relates to the technical field of medical devices, in particular to a novel peripheral blood collection needle and a processing method thereof.
- Disposable peripheral blood collection needle is a commonly used medical device, which is used to puncture a patient's finger or ear to make the corresponding part bleed, so as to carry out follow-up blood collection work.
- the blood collection needles on the market will bring pain to patients when they are used. This pain is caused by the slow insertion or exit speed of the blood collection needle during the use of the blood collection equipment.
- the existing peripheral blood collection needle has a complicated inner sleeve structure. In order to improve the triggering accuracy, the dimensions of each component of the peripheral blood collection needle are required to be accurate, which virtually increases the processing difficulty of the blood collection needle.
- One of the objectives of the present invention is to provide a new type of peripheral blood collection needle to solve the problem of the existing peripheral blood collection needles that easily cause pain to patients due to unstable needle insertion or exit speed.
- the second object of the present invention is to provide a novel method for processing a peripheral lancet, so as to solve the problem of difficulty in processing existing peripheral lancets.
- a novel peripheral blood collection needle comprising a trigger sliding sleeve, an outer sleeve, a needle body connector and a needle body with a pointed portion;
- the trigger sliding sleeve is coaxial and slidably connected in the outer sleeve.
- the front end of the trigger sliding sleeve is provided with a jack for passing through the tip of the needle body.
- the rear end of the trigger sliding sleeve is In an open shape, strip-shaped opening slots are provided on the opposite radial sides of the rear end of the trigger sliding sleeve, and elastic handles are arranged in the opening slots;
- the front end of the outer sleeve is open, and the protective cap is covered at the opening of the outer sleeve.
- the rear end of the outer sleeve is fixedly provided with a rear cover.
- the radially opposite sides are recessed with release grooves for cooperating with the elastic handle;
- the needle body connector is slidably connected in the trigger sliding sleeve, the needle body connector includes a needle base for fixedly connecting the needle body and a sheath sleeved outside the tip of the needle body, The sheath is located at the front end of the needle hub; the front end of the sheath passes through the socket and a connecting handle is fixedly arranged, and the connecting handle is connected with the protective cap;
- a spring is fixedly arranged between the back cover and the needle seat.
- the front end of the elastic handle is fixedly connected with the front end in the opening groove, and the rear end thereof is a wing-shaped protrusion protruding from the outside of the trigger sliding sleeve.
- the pitch of the front and rear ends of the spring is larger than the pitch of the middle part of the spring.
- the protective cap includes two butt-connected cap bodies, and four installation bosses are fixedly arranged on the inner front part of each cap body, and the four installation bosses are arranged in a quadrilateral, two of which are diagonal
- the arranged installation bosses are provided with connection through holes along their axial direction, and the other two installation bosses are provided with fastening cylinders for inserting into the connection holes;
- the area surrounded by the 4 installation bosses is the connecting handle limiting area, and two strip-shaped backing plates are arranged in the connecting handle limiting area on the inner wall of the cap.
- the front part of the connecting handle abuts against the two installation bosses at the front part of the limiting area of the connecting handle, and the rear end edge of the connecting handle contacts the rear part of the limiting area of the connecting handle.
- the two mounting bosses abut against each other.
- Guide rail bars are arranged on the radially opposite sides of the inner side wall of the trigger sliding sleeve, the axial direction of the guide rail bars is parallel to the axial direction of the trigger sliding sleeve, and the opposite sides of the needle seat are provided for connecting with the The guide rail fits the chute.
- the inner wall of the front end of the outer sleeve is provided with a positioning block
- the outer wall of the front end of the trigger sleeve is provided with a positioning slot matching the positioning block.
- a method for processing a novel peripheral blood collection needle comprising the following steps:
- the needle connector in the novel peripheral blood collection needle as claimed in any one of claims 1-7: select an injection mold that is compatible with the needle body connector, and first position the needle body on the injection molding mold, and then carry out injection molding on the injection mold, the needle connector includes a needle base and a sheath, the sheath is located at the front end of the needle base, the front end of the sheath is fixedly provided with a connecting handle, and the needle base It is integrally formed with the sheath, the needle body is located in the needle body connector, and a V-shaped notch is opened at the junction of the needle seat and the sheath;
- the trigger sliding sleeve slides forward along the outer sleeve until the front end of the trigger sliding sleeve protrudes from the front end of the outer sleeve, and the elastic handle is in a tightened state;
- the pitch at the front and rear ends of the spring is greater than the pitch at the middle of the spring.
- the protective cap includes two butt-connected cap bodies, and four installation bosses are fixedly arranged on the inner front part of each cap body, and the four installation bosses are arranged in a quadrilateral, two of which are arranged in a diagonal line.
- the installation boss is provided with a connection through hole along its axial direction, and the other two installation bosses are provided with fastening cylinders for inserting into the connection through hole;
- the area surrounded by the 4 installation bosses is the connecting handle limiting area, and two strip-shaped backing plates are arranged in the connecting handle limiting area on the inner wall of the cap.
- the protective cap When using the blood collection needle of the present invention, the protective cap is rotated to separate the sheath from the needle seat, and the protective cap drives the sheath to leave the trigger sliding sleeve, so that the tip of the needle body is exposed and located in the trigger sliding sleeve. Then touch the front end of the trigger sliding sleeve to the part of the skin to be acupunctured, press the outer sleeve firmly downward, the elastic handle of the trigger sliding sleeve is released in the release groove, and the restraint of the elastic handle on the needle seat is released, and the needle seat is in the Under the elastic force of the spring, the trigger sliding sleeve quickly slides forward to drive the needle body to quickly acupuncture the human skin. inside the set.
- the tip of the needle body is not exposed to the trigger sliding sleeve, which improves the safety.
- the needle body of the present invention can quickly insert and exit the needle under the action of the spring and the trigger sliding sleeve, which reduces the pain of the patient.
- the needle body connector can be made by integral injection molding, and the needle body is placed in the mold in advance, so that the needle body is located in the integrally formed needle body connector, which not only reduces the difficulty of connecting the needle body and the sheath , Also protect the needle body from damage.
- the connection between the protective cap and the needle connector reduces the processing difficulty, saves processing steps as a whole, and reduces the processing difficulty.
- Fig. 1 structural representation of the present invention
- Fig. 2 the structural representation of triggering sliding sleeve
- Figure 3 The front view of the trigger sleeve
- Figure 4 The three-dimensional structure diagram of another perspective of the trigger sleeve
- FIG. 5 Schematic diagram of the structure of the needle connector
- Figure 6 Schematic diagram of the structure of the outer sleeve
- Figure 7 Front view of the back cover
- Figure 8 Stereoscopic structure diagram of the back cover
- Figure 9 Schematic diagram of the structure of the protective cap.
- Example 1 A new peripheral blood collection needle
- the novel peripheral blood collection needle of the present invention includes a trigger sliding sleeve 1 , an outer sleeve 2 , a needle body connector 3 and a needle body 4 with a pointed portion.
- the needle body 4 adopts a steel needle, and the axial middle part of the needle body 4 is provided with a curved section, so that after the injection molding of the needle body and the needle body connector, thermal expansion and contraction of the needle body can be avoided, causing the needle body to be easy to the needle seat 31 of the needle body connector. Detachment improves the reliability of the blood collection needle.
- the needle body connector 3 is slidably connected in the trigger sliding sleeve 1, and the needle body connector 3 includes a needle base 31 for fixedly connecting the needle body 4 and a tip sheathed on the needle body 4
- the outer sheath 32 is located at the front end of the needle hub 31 .
- a connecting handle 33 is fixedly arranged at the front end of the sheath 32 , and the connecting handle 33 is connected with the protective cap 5 .
- the connecting handle 33 is a trapezoidal plate structure, the plate surface of the connecting handle 33 is parallel to its axial direction, and the side length of the front end of the connecting handle 33 plate is smaller than the side length of the rear end.
- the front end refers to the end in the direction of the needle tip in the figure, that is, the upper end of the corresponding component along the direction parallel to the axial direction of the trigger sleeve 1 .
- the trigger sliding sleeve 1 is coaxial and slidably connected in the outer sleeve 2 , and the front end of the trigger sliding sleeve 1 is provided with an insertion hole 15 for passing through the tip of the needle body 4 .
- the insertion hole 15 includes a strip-shaped through hole opened at the front end of the trigger sliding sleeve 1 and a circular through-hole located in the middle of the strip-shaped through-hole. The diameter of the circular through-hole is larger than the width of the strip-shaped through-hole.
- the side length of the connecting handle 33 rear end is less than the long side of the bar-shaped through hole of the jack 15, the thickness of the connecting handle 33 is less than the width of the bar-shaped through hole of the jack 15, and the length direction of the connecting handle 33 front end is consistent with the bar of the jack 15.
- the length direction of the through hole is parallel.
- the setting of the strip-shaped through hole of the jack 15 facilitates the passing of the connecting handle 33
- the setting of the circular through hole of the jack 15 facilitates the passing of the sheath 32 .
- the rear end of the trigger sliding sleeve 1 is in an open shape, and bar-shaped opening grooves are provided on the radially opposite sides of the rear end of the trigger sliding sleeve 1 .
- the two open slots 11 are respectively two sides of the rear end of the trigger sliding sleeve 1 parallel to the length direction of the insertion hole 15 , and the elastic handles 12 are arranged in the open slots 11 .
- the front end of the elastic handle 12 is fixedly connected with the front end in the opening groove 11 , and its rear end is a wing-shaped protrusion protruding from the outside of the trigger sliding sleeve 1 where it is located.
- the wing-shaped protrusion is located in the opening groove 11 , that is, the axial length of the elastic handle 12 is smaller than the axial length of the opening groove 11 .
- a spring 7 is fixedly arranged between the rear cover 6 and the needle holder 31 .
- the rear end of the needle holder 31 is integrally formed with a bottom column 34 , and the outer peripheral surface of the front end of the bottom column 34 is provided with a locking protrusion due to the locking spring 7 .
- the back cover 6 comprises a cover plate 61 and a fixed tube 62 vertically arranged on the front end of the cover plate 61.
- a rectangular through groove is provided on the fixed tube 62, and an elastic protrusion 63 is fixedly arranged in the rectangular through groove. The front end of the elastic protrusion 63 is connected to the The front end of the rectangular through groove is fixedly connected.
- a ring rib 64 is provided on the outer peripheral surface of the fixed pipe 62 .
- a central column 65 is coaxially arranged in the fixed tube 62, and the rear end of the central column 65 is fixedly connected with the cover plate 61.
- a plurality of corrugations 66 are evenly arranged on the inner circumference of the fixed tube 62 along the circumference, and the axial direction of the card corrugated 66 is aligned with the fixed tube. 62 are axially parallel. The card flute 66 cooperates with the center column 65 to clamp the spring 7 .
- the pitch of the front and rear ends of the spring 7 is greater than the pitch of the middle part of the spring 7 .
- the smaller pitch in the middle of the spring 7 can enable the spring 7 to store more elastic potential energy, so that the spring 7 can be released after being compressed to quickly eject the needle seat. It is also possible to quickly eject the needle holder and then quickly retract it.
- the front end of the outer sleeve 2 is open, and the protective cap 5 is covered at the opening of the outer sleeve 2, and the rear end of the outer sleeve 2 is fixedly provided with a rear cover 6,
- the radially opposite sides of the inner wall surface at the rear of the outer sleeve 2 are recessed with release grooves 21 for matching with the elastic handle 12 , and the rear end of the release groove 21 extends to the rear end of the outer sleeve 2 .
- the inner peripheral surface of the rear end of the outer sleeve 2 is provided with an annular groove for matching with the annular rib 64 of the rear cover 6 .
- the inner wall of the front end of the outer sleeve 2 is provided with a positioning block 22
- the outer wall of the front end of the trigger sliding sleeve 1 is provided with a positioning slot 14 matched with the positioning block 22 .
- Guide rail bars 13 are arranged on the radially opposite sides of the inner side wall of the trigger sliding sleeve 1 , the axial direction of the guide rail bars 13 is parallel to the axial direction of the trigger sliding sleeve 1 , and the opposite sides of the needle seat 31 are provided for cooperating with the guide rail bars 13 The chute 311.
- the arrangement direction of the two rail bars 13 is parallel to the arrangement direction of the two elastic handles 12 , so that the top of the needle holder 31 can be engaged with the rear end of the insertion hole 15 .
- the protective cap 5 includes two butt-connected cap bodies 51 , each cap body 51 is fixedly provided with four mounting bosses 52 at the front inside, and the four mounting bosses 52 are arranged in a quadrangular shape, two of which are The installation bosses 52 arranged in a diagonal line are provided with connection through holes 53 along the axial direction, and the other two installation bosses 52 are provided with fastening cylinders 54 for inserting the connection through holes 53.
- the four installation bosses 52 are surrounded by The area is the connecting handle limit area 55, and two strip-shaped backing plates 56 are arranged in the connection handle limit area 55 on the inner wall of the cap body 51.
- the front part of the connecting handle 33 abuts against the two mounting bosses 52 at the front of the connecting handle limiting area 55, and the rear end edge of the connecting handle 33 contacts the two installing bosses 52 at the rear of the connecting handle limiting area 55. meet each other. In this way, during installation, the connecting handle can be clipped into the protective cap without fixedly connecting the sheath and the protective cap, which reduces the installation process and reduces the difficulty of installation.
- Embodiment 2 The processing method of the novel peripheral blood collection needle
- the processing method of the novel peripheral blood collection needle of the present invention comprises the following steps:
- the needle connector 3 includes a needle base 31 and a sheath 32.
- the sheath 32 is located at the front end of the needle base 31.
- the front end of the sheath 32 is fixedly provided with a connecting handle 33.
- the needle base 31 and the sheath 32 are integrally formed.
- the needle body 4 is located in the needle body connector 3 , and a V-shaped notch is opened at the joint between the needle seat 31 and the sheath 32 .
- the trigger sliding sleeve 1 slides forward along the outer sleeve 2 until the front end of the trigger sliding sleeve 1 protrudes from the front end of the outer sleeve 2, and the elastic handle 12 is in a tightened state.
- the protective cap 5 covers the protective cap 5 on the front end of the outer sleeve 2 , and connect the connecting handle 33 to the front part of the protective cap 5 .
- the protective cap 5 includes two butt-connected cap bodies 51, and four mounting bosses 52 are fixedly arranged on the inside front of each cap body 51, and the four mounting bosses 52 are arranged in a quadrilateral, and two of them are installed in a diagonal arrangement.
- the boss 52 is provided with a connection through hole 53 along its axial direction, and the other two installation bosses 52 are provided with fastening cylinders 54 for plugging in the connection through hole 53. During installation, two identical cap bodies 1 are required.
- the area surrounded by the four installation bosses 52 is the connecting handle limiting area 55 , and two strip-shaped backing plates are arranged in the connecting handle limiting area 55 on the inner wall of the cap body 51 .
- the connecting handle limit area 55 of one of the cap bodies 51 is aligned with the connecting handle 34, and the other cap body is fastened on the cap body 51, through the connecting through hole 53 and the fastening cylinder 54 The cooperation of the two caps achieves a stable connection.
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Abstract
本发明提供一种新型末梢采血针及其加工方法，新型末梢采血针包括触发滑套、外套筒、针体连接件和针体；触发滑套同轴且滑动连接于外套筒内，触发滑套的前端开设插孔，触发滑套的后端径向的相对两侧开设开口槽，开口槽内设置弹性卡柄；外套筒的前端呈敞口状，在外套筒的敞口处盖合保护帽，外套筒的后端固定设置后盖，外套筒后部的内壁面的径向相对两侧凹设释放凹槽；针体连接件滑动连接于触发滑套内，针体连接件包括针座和护套；护套的前端穿出插孔并固定设置连接柄；后盖与针座之间固定设置弹簧。本发明的针体在弹簧及触发滑套的作用下能够快速进针和出针，减少了病人的疼痛感，并且降低了加工难度。
Description
本发明涉及医用器械技术领域，尤其涉及一种新型末梢采血针及其加工方法。
一次性末梢采血针是一种常用的医疗器材，其用于针刺扎病人的手指或耳部以使相应部位出血，以便进行后续采血工作。
目前，市面上的采血针在使用时都会给病人带来疼痛感，这种疼痛感是因为采血器材在使用过程中，采血针的进针速度或出针速度过慢。并且，现有的末梢采血针，内套筒结构复杂，为了提高触发的精确度，需要末梢采血针的各部件的尺寸精确，无形中增加了采血针的加工难度。
本发明的目的之一在于提供一种新型末梢采血针，以解决现有的末梢采血针中存在的由于进针或出针速度不稳定导致的易给病人带来疼痛感的问题。
本发明的目的之二在于提供一种新型末梢采血针的加工方法，以解决现有的末梢采血针中存在的加工难度大的问题。
本发明的目的之一是这样实现的：
一种新型末梢采血针，包括触发滑套、外套筒、针体连接件和具有一尖部的针体；
所述触发滑套同轴且滑动连接于所述外套筒内，所述触发滑套的前端开设用于穿出所述针体尖部穿出的插孔，所述触发滑套的后端呈敞口状，所述触发滑套的后端径向的相对两侧开设条形的开口槽，所述开口槽内设置弹性卡柄；
所述外套筒的前端呈敞口状，在所述外套筒的敞口处盖合保护帽，所述外套筒的后端固定设置后盖，所述外套筒后部的内壁面的径向相对两侧凹设用于与所述弹性卡柄配合的释放凹槽；
所述针体连接件滑动连接于所述触发滑套内，所述针体连接件包括用于固定连接所述针体的针座和套设于所述针体的尖部外侧的护套，所述护套位于所述针座的前端；所述护套的前端穿出所述插孔并固定设置连接柄，所述连接柄与所述保护帽连接；
所述后盖与所述针座之间固定设置弹簧。
其中，所述弹性卡柄的前端与所述开口槽内的前端固定连接，其后端为凸出于所处触发滑套外侧的翼形凸块。
其中，所述弹簧的前、后两端的节距大于所述弹簧中部的节距。
其中，所述保护帽包括两个相对接的帽体，每个所述帽体内侧前部固定设置4个安装凸柱，4个所述安装凸柱呈四边形排列，其中两个呈对角线排列的所述安装凸柱沿其轴向开设连接通孔，另外两个所述安装凸柱设置用于插接所述连接通孔的紧固圆柱；
4个所述安装凸柱所围成的区域为连接柄限位区，所述帽体内壁面的连接柄限位区内设置两个条形垫板。
其中，所述连接柄的前部与所述连接柄限位区的前部的两个所述安装凸柱相抵接，所述连接柄的后端边沿与所述连接柄限位区的后部的两个所述安装凸柱相抵接。
所述触发滑套的内侧壁的径向相对的两侧设置导轨条，所述导轨条的轴向与所述触发滑套的轴向平行，所述针座相对的两侧开设用于与所述导轨条配合的滑槽。
其中，所述外套筒的前端的内壁面设置定位卡块，所述触发滑套的前端的外侧壁开设与所述定位卡块相配合的定位卡槽。
本发明的目的之二是这样实现的：
一种新型末梢采血针的加工方法，包括以下步骤：
a、准备如权利要求1-7中任一项所述的新型末梢采血针中的触发滑套、外套筒和具有一尖部的针体；
b、制作如权利要求1-7中任一项所述的新型末梢采血针中的针体连接件：选取与所述针体连接件相适配的注塑模具，先将针体定位于该注塑模具，然后对该注塑模具进行注塑，所述针体连接件包括针座和护套，所述护套位于所述针座的前端，所述护套的前端固定设置连接柄，所述针座与所述护套为一体成型设置，所述针体位于所述针体连接件内，所述针座与所述护套的相接处开设V形豁口；
c、所述触发滑套沿所述外套筒向前滑动，直至所述触发滑套的前端凸出于所述外套筒的前端，所述弹性卡柄处于收紧状态；
d、准备一用于盖合于所述外套筒后端的后盖，在针座与后盖之间固定安装弹簧；
e、将所述针体连接件放置于所述外套筒内，并推动所述针体连接件向前滑动，直至连接柄向前穿过所述触发滑套的插孔，且所述针座卡接于所述触发滑套的后端，然后将所述后盖盖合于所述外套筒后端，弹簧处于压缩状态；
f、将所述保护帽盖合于所述外套筒的前端，所述连接柄卡接于所述保护帽内的前部。
所述弹簧的前、后两端的节距大于所述弹簧中部的节距。
所述保护帽包括两个相对接的帽体，每个所述帽体内侧前部固定设置4个安装凸柱，4个所述安装凸柱呈四边形排列，其中两个呈对角线排列的所述安装凸柱沿其轴向开设连接通孔，另外两个所述安装凸柱设置用于插接所述连接通孔的紧固圆柱；
4个所述安装凸柱所围成的区域为连接柄限位区，所述帽体内壁面的连接柄限位区内设置两个条形垫板。
本发明的有益效果是：
在使用本发明的采血针时，旋转保护帽，以使护套与针座分离开，保护帽带动护套离开触发滑套，使针体的尖部裸露并位于触发滑套内。然后将触发滑套的前端接触皮肤欲针刺部位，用力向下按压外套筒，触发滑套的弹性卡柄释放于释放凹槽内，解除了弹性卡柄对针座的约束，针座在弹簧的弹力下沿触发滑套快速向前滑动，以带动针体快速针刺人体皮肤，针体针刺人体皮肤时，弹簧处于伸长状态，然后针体在弹簧弹力下被拉回到触发滑套内。在针体针刺皮肤前后，针体的尖部均未裸露至触发滑套内，提高了安全性。本发明的针体在弹簧及触发滑套的作用下能够快速进针和出针，减少了病人的疼痛感。此外，针体连接件可采用一体注塑成型的方法制得，并预先将针体置于模具内，使得针体位于一体成型的针体连接件内，既降低了针体与护套的连接难度，也保护针体不受损坏。另外保护帽与针体连接件的连接降低了加工难度，整体节省了加工步骤，降低了加工难度。
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1：本发明的结构示意图；
图2:触发滑套的结构示意图；
图3：触发滑套的主视图；
图4：触发滑套另一视角的立体结构图；
图5：针体连接件的结构示意图；
图6：外套筒的结构示意图；
图7：后盖的主视图；
图8：后盖的立体结构图；
图9：保护帽的结构示意图。
附图标记说明
1、触发滑套；2、外套筒；3、针体连接件；4、针体； 5、保护帽；6、后盖；7、弹簧；11、开口槽；12、弹性卡柄；13、导轨条；14、定位卡槽；15、插孔；21、释放凹槽；22、定位卡块；31、针座；32、护套；33、连接柄；34、底柱；51、帽体；52、安装凸柱；53、连接通孔；54、紧固圆柱；55、连接柄限位区；56、条形垫板；61、盖板；62、固定管；63、弹性凸块；64、环肋；65、中心柱；66、卡楞；311、滑槽。
下面结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是本发明还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似推广，因此本发明不受下面公开的具体实施例的限制。
实施例一：新型末梢采血针
如图1～图5所示，本发明的新型末梢采血针，包括触发滑套1、外套筒2、针体连接件3和具有一尖部的针体4。针体4采用钢针，针体4的轴向的中部设置弯曲段，这样可在针体与针体连接件注塑成型后，避免热胀冷缩导致针体易于针体连接件的针座31脱离，提高了采血针的可靠性。
如图1～图5所示，针体连接件3滑动连接于触发滑套1内，针体连接件3包括用于固定连接针体4的针座31和套设于针体4的尖部外侧的护套32，护套32位于针座31的前端。护套32的前端固定设置连接柄33，连接柄33与保护帽5连接。在本实施例中，连接柄33为一梯形板状结构，连接柄33的板面与其轴向平行，连接柄33板面的前端的边长小于其后端的边长。在本实施例中，前端指的是图中针尖所述方向的端部，也即对应部件沿平行于触发滑套1的轴向的方向的上端。触发滑套1同轴且滑动连接于外套筒2内，触发滑套1的前端开设用于穿出针体4尖部穿出的插孔15。插孔15包括开设在触发滑套1前端的条形通孔和位于条形通孔中部的圆形通孔，该圆形通孔的孔径大于该条形通孔的宽度。连接柄33后端的边长小于插孔15的条形通孔的长边，连接柄33的厚度小于插孔15的条形通孔的宽度，连接柄33前端的长度方向与插孔15的条形通孔的长度方向平行。插孔15的条形通孔的设置便于连接柄33穿过，插孔15的圆形通孔的设置便于护套32的穿过。触发滑套1的后端呈敞口状，触发滑套1的后端径向的相对两侧开设条形的开口槽。在本实施例中，两开口槽11分别为触发滑套1后端的平行于插孔15长度方向的两侧，开口槽11内设置弹性卡柄12。弹性卡柄12的前端与开口槽11内的前端固定连接，其后端为凸出于所处触发滑套1外侧的翼形凸块。翼形凸块位于开口槽11内，即弹性卡柄12的轴向长度小于开口槽11的轴向长度。
如图1、图7、图8所示，后盖6与针座31之间固定设置弹簧7。在本实施例中，针座31的后端一体成型设置底柱34，底柱34的前端的外圆周面设置由于卡固弹簧的7的卡凸。后盖6的包括盖板61以及垂直设置在盖板61前端的固定管62，固定管62上开设一矩形通槽，该矩形通槽内固定设置弹性凸块63，弹性凸块63的前端与矩形通槽的前端固定连接。弹性凸块63的后端与盖板61之间具有间隙，弹性凸块63的宽度小于矩形通槽的宽度。固定管62的外圆周面设置环肋64。固定管62内同轴设置中心柱65，中心柱65的后端与盖板61固定连接，在固定管62的内圆周沿圆周均匀设置多个卡楞66，卡楞66的轴向与固定管62的轴向平行。卡楞66与中心柱65配合可夹紧弹簧7。弹簧7的前、后两端的节距大于弹簧7中部的节距。弹簧7中部的节距较小可以使得弹簧7能够储存更多的弹性势能，可以使弹簧7被压缩后再释放能够快速将针座弹出。也能够将针座快速弹出后再将其快速收回。
如图1、图6和图9所示，外套筒2的前端呈敞口状，在外套筒2的敞口处盖合保护帽5，外套筒2的后端固定设置后盖6，外套筒2后部的内壁面的径向相对两侧凹设用于与弹性卡柄12配合的释放凹槽21，释放凹槽21的后端延伸至外套筒2的后端。外套筒2的后端的内周面开设用于与后盖6的环肋64配合的环槽。外套筒2的前端的内壁面设置定位卡块22，触发滑套1的前端的外侧壁开设与定位卡块22相配合的定位卡槽14。触发滑套1的内侧壁的径向相对的两侧设置导轨条13，导轨条13的轴向与触发滑套1的轴向平行，针座31相对的两侧开设用于与导轨条13配合的滑槽311。两个导轨条13的排列方向与两个弹性卡柄12的排列方向平行，以使针座31的顶端能卡接于插孔15的后端。
如图9所示，保护帽5包括两个相对接的帽体51，每个帽体51内侧前部固定设置4个安装凸柱52，4个安装凸柱52呈四边形排列，其中两个呈对角线排列的安装凸柱52沿其轴向开设连接通孔53，另外两个安装凸柱52设置用于插接连接通孔53的紧固圆柱54。4个安装凸柱52所围成的区域为连接柄限位区55，帽体51内壁面的连接柄限位区55内设置两个条形垫板56。连接柄33的前部与连接柄限位区55的前部的两个安装凸柱52相抵接，连接柄33的后端边沿与连接柄限位区55的后部的两个安装凸柱52相抵接。这样，在安装时，可以不需要将护套与保护帽固定连接，即可将连接柄卡接于保护帽中，减少了安装工序，降低了安装难度。
实施例二：新型末梢采血针的加工方法
如图1～图9所示，本发明的新型末梢采血针的加工方法，包括以下步骤：
a、准备如实施例一的新型末梢采血针中的触发滑套1、外套筒2和具有一尖部的针体4。
b、制作如第一实施例的新型末梢采血针中的针体连接件3：选取与针体连接件3相适配的注塑模具，先将针体4定位于该注塑模具，然后对该注塑模具进行注塑，针体连接件3包括针座31和护套32，护套32位于针座31的前端，护套32的前端固定设置连接柄33，针座31与护套32为一体成型设置，针体4位于针体连接件3内，针座31与护套32的相接处开设V形豁口。
c、触发滑套1沿外套筒2向前滑动，直至触发滑套1的前端凸出于外套筒2的前端，弹性卡柄12处于收紧状态。
d、准备一用于盖合于外套筒2后端的后盖6，在针座31与后盖6之间固定安装弹簧7。弹簧7的前、后两端的节距大于弹簧7中部的节距。
e、将针体连接件3放置于外套筒2内，并推动针体连接件3向前滑动，直至连接柄33向前穿过触发滑套1的插孔，且针座31卡接于触发滑套1的后端，然后将后盖6盖合于外套筒2后端，弹簧7处于压缩状态。
f、将保护帽5盖合于外套筒2的前端，连接柄33卡接于保护帽5内的前部。保护帽5包括两个相对接的帽体51，每个帽体51内侧前部固定设置4个安装凸柱52，4个安装凸柱52呈四边形排列，其中两个呈对角线排列的安装凸柱52沿其轴向开设连接通孔53，另外两个安装凸柱52设置用于插接连接通孔53的紧固圆柱54，在安装时，需要两个相同的该帽体1即可组装为一个保护帽，加工时只加工一种结构的帽体1即可，不需要像传统的加工两种帽体，降低了加工难度和装配难度。4个安装凸柱52所围成的区域为连接柄限位区55，帽体51内壁面的连接柄限位区55内设置两个条形垫板。在安装保护帽时，将其中一个帽体51的连接柄限位区55对位于连接柄34，并将另一帽体扣合于该帽体51上，通过连接通孔53和紧固圆柱54的配合实现两帽体的稳固连接。
以上说明内容仅为本发明较佳实施例，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
Claims (10)
- 一种新型末梢采血针，其特征在于，包括触发滑套、外套筒、针体连接件和具有一尖部的针体；所述触发滑套同轴且滑动连接于所述外套筒内，所述触发滑套的前端开设用于穿出所述针体尖部穿出的插孔，所述触发滑套的后端呈敞口状，所述触发滑套的后端径向的相对两侧开设条形的开口槽，所述开口槽内设置弹性卡柄；所述外套筒的前端呈敞口状，在所述外套筒的敞口处盖合保护帽，所述外套筒的后端固定设置后盖，所述外套筒后部的内壁面的径向相对两侧凹设用于与所述弹性卡柄配合的释放凹槽；所述针体连接件滑动连接于所述触发滑套内，所述针体连接件包括用于固定连接所述针体的针座和套设于所述针体的尖部外侧的护套，所述护套位于所述针座的前端；所述护套的前端穿出所述插孔并固定设置连接柄，所述连接柄与所述保护帽连接；所述后盖与所述针座之间固定设置弹簧。
- 根据权利要求1所述的新型末梢采血针，其特征在于，所述弹性卡柄的前端与所述开口槽内的前端固定连接，其后端为凸出于所处触发滑套外侧的翼形凸块。
- 根据权利要求1所述的新型末梢采血针，其特征在于，所述弹簧的前、后两端的节距大于所述弹簧中部的节距。
- 根据权利要求1所述的新型末梢采血针，其特征在于，所述保护帽包括两个相对接的帽体，每个所述帽体内侧前部固定设置4个安装凸柱，4个所述安装凸柱呈四边形排列，其中两个呈对角线排列的所述安装凸柱沿其轴向开设连接通孔，另外两个所述安装凸柱设置用于插接所述连接通孔的紧固圆柱；4个所述安装凸柱所围成的区域为连接柄限位区，所述帽体内壁面的连接柄限位区内设置两个条形垫板。
- 根据权利要求4所述的新型末梢采血针，其特征在于，所述连接柄的前部与所述连接柄限位区的前部的两个所述安装凸柱相抵接，所述连接柄的后端边沿与所述连接柄限位区的后部的两个所述安装凸柱相抵接。
- 根据权利要求1所述的新型末梢采血针，其特征在于，所述触发滑套的内侧壁的径向相对的两侧设置导轨条，所述导轨条的轴向与所述触发滑套的轴向平行，所述针座相对的两侧开设用于与所述导轨条配合的滑槽。
- 根据权利要求6所述的新型末梢采血针，其特征在于，所述外套筒的前端的内壁面设置定位卡块，所述触发滑套的前端的外侧壁开设与所述定位卡块相配合的定位卡槽。
- 一种新型末梢采血针的加工方法，其特征在于，包括以下步骤：a、准备如权利要求1-7中任一项所述的新型末梢采血针中的触发滑套、外套筒和具有一尖部的针体；b、制作如权利要求1-7中任一项所述的新型末梢采血针中的针体连接件：选取与所述针体连接件相适配的注塑模具，先将针体定位于该注塑模具，然后对该注塑模具进行注塑，所述针体连接件包括针座和护套，所述护套位于所述针座的前端，所述护套的前端固定设置连接柄，所述针座与所述护套为一体成型设置，所述针体位于所述针体连接件内，所述针座与所述护套的相接处开设V形豁口；c、所述触发滑套沿所述外套筒向前滑动，直至所述触发滑套的前端凸出于所述外套筒的前端，所述弹性卡柄处于收紧状态；d、准备一用于盖合于所述外套筒后端的后盖，在针座与后盖之间固定安装弹簧；e、将所述针体连接件放置于所述外套筒内，并推动所述针体连接件向前滑动，直至连接柄向前穿过所述触发滑套的插孔，且所述针座卡接于所述触发滑套的后端，然后将所述后盖盖合于所述外套筒后端，弹簧处于压缩状态；f、将所述保护帽盖合于所述外套筒的前端，所述连接柄卡接于所述保护帽内的前部。
- 根据权利要求8所述的新型末梢采血针的加工方法，其特征在于，所述弹簧的前、后两端的节距大于所述弹簧中部的节距。
- 根据权利要求8所述的新型末梢采血针的加工方法，其特征在于，所述保护帽包括两个相对接的帽体，每个所述帽体内侧前部固定设置4个安装凸柱，4个所述安装凸柱呈四边形排列，其中两个呈对角线排列的所述安装凸柱沿其轴向开设连接通孔，另外两个所述安装凸柱设置用于插接所述连接通孔的紧固圆柱；4个所述安装凸柱所围成的区域为连接柄限位区，所述帽体内壁面的连接柄限位区内设置两个条形垫板。
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