JPH0434910B2 - - Google Patents
Info
- Publication number
- JPH0434910B2 JPH0434910B2 JP1032871A JP3287189A JPH0434910B2 JP H0434910 B2 JPH0434910 B2 JP H0434910B2 JP 1032871 A JP1032871 A JP 1032871A JP 3287189 A JP3287189 A JP 3287189A JP H0434910 B2 JPH0434910 B2 JP H0434910B2
- Authority
- JP
- Japan
- Prior art keywords
- gasket
- plunger
- syringe
- barrel
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 229920001971 elastomer Polymers 0.000 claims description 19
- 239000000806 elastomer Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000252254 Catostomidae Species 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31513—Piston constructions to improve sealing or sliding
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は注射器用プランジヤーに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a plunger for a syringe.
従来、この種の注射器用プランジヤーとして第
２８図ないし第３０図に示すものが知られてい
る。
Conventionally, as this type of plunger for a syringe, those shown in FIGS. 28 to 30 are known.
図において、１は注射器、２はこの注射器１の
バレル、３はこのバレル２に挿入し、吸入した液
である注射液を注出する注射器用プランジヤー、
４ａはこの注射器用プランジヤー基体、５はこの
プランジヤー基体４ａの先端に設けたガスケツト
である吸子、この吸子５として、イ）第２９図に
示すような全体がゴムであるもの６と、ロ）第３
０図に示すようなプラスチツクに細いゴムリング
７を嵌めたものがある。８はバレル２に先端に設
けたノズル部、９はこのノズル部８に嵌装する注
射針であり、使用時、この注射針９をノズル部８
に嵌装し、バレル２内に注射器用プランジヤー３
を挿入し、注射針９を注射液中にひたし、注射器
用プランジヤー３を操作することにより、バレル
２内に注射液を吸入したのち、注射を行うように
なつている。この注射器１は滅菌されており、そ
のまま直ちに使用でき、かつ１回限りの使用で使
い捨てされるデイスポーザル注射器として、使用
時，洗滌，乾燥，滅菌などの手間がはぶけ、経費
の節約および人手不足の解消になるものであつ
た。 In the figure, 1 is a syringe, 2 is a barrel of this syringe 1, 3 is a plunger for a syringe that is inserted into this barrel 2 and pours out the injection liquid that is the inhaled liquid;
4a is this plunger base for a syringe, 5 is a sucker which is a gasket provided at the tip of this plunger base 4a, and this sucker 5 is a) 6 which is made entirely of rubber as shown in FIG. 29; ) 3rd
There is one in which a thin rubber ring 7 is fitted into plastic as shown in Figure 0. 8 is a nozzle part provided at the tip of the barrel 2, and 9 is an injection needle fitted into this nozzle part 8. During use, this injection needle 9 is inserted into the nozzle part 8.
The syringe plunger 3 is inserted into the barrel 2.
By inserting the injection needle 9 into the injection solution and operating the syringe plunger 3, the injection solution is sucked into the barrel 2 and then the injection is performed. This syringe 1 is sterilized and can be used immediately, and as a disposable syringe that can be used once and then discarded, it eliminates the hassle of washing, drying, sterilizing, etc. during use, saving costs and eliminating labor shortages. It was something that would become.
しかしながら、従来の注射器用プランジヤーに
あつては、プランジヤー基体４ａの先端に設けた
吸子５であるイ）全体がゴムのもの、およびロ）
プラスチツクに細いゴムリングをはめたものは、
いずれも製造時に試験，調整などを行つたもので
あるが、経年変化などにより、これらの吸子を用
いた注射器用プランジヤー３を使用時に、吸子５
とバレル２間に接触の状態がかたすぎあるいはゆ
るすぎて円滑に注射器用プランジヤー３をバレル
２内に摺動しにくいことがあるという問題点があ
つた。
However, in the case of a conventional plunger for a syringe, a) the sucker 5 provided at the tip of the plunger base 4a is made entirely of rubber, and b)
A thin rubber ring attached to plastic is
All of these were tested and adjusted during manufacturing, but due to changes over time, when using the syringe plunger 3 that uses these suckers, the sucker 5
There has been a problem in that the contact between the syringe plunger 3 and the barrel 2 is too hard or too loose, making it difficult to smoothly slide the syringe plunger 3 into the barrel 2.
このため、調整に手間取り時間と人件費などが
それだけ高くなり、すぐに使用できないので、急
患に間に合わなくなるおそれがあるという難点が
あつた。 As a result, the adjustment time and labor costs increase accordingly, and since it cannot be used immediately, there is a risk that it will not be available in time for emergency cases.
この発明は、このような問題点を解決するため
になされたもので、使用時、プランジヤー本体と
バレル間の接触状態がよく、液もれを防止でき、
円滑に摺動し、確実，安全に操作できるプランジ
ヤーであつて、すでに滅菌されており、そのまま
直ちに使用でき、しかも１回限りの使用で使い捨
てされるデイスポーサブル注射器用プランジヤー
を提供することを目的としている。 This invention was made to solve these problems, and when in use, the contact between the plunger body and the barrel is good, and liquid leakage can be prevented.
To provide a disposable syringe plunger that slides smoothly, can be operated reliably and safely, is already sterilized, can be used immediately, and is disposable after one-time use. There is.
上記目的を達成するために、この発明の注射器
用プランジヤーにおいては、プランジヤー本体の
先端に筒状部を形成し、この筒状部に先端より下
方に向う軸対称の二以上のスリツトを穿ち、前記
筒状部の先端に成型時に生じたスプルーを有する
エラストマー製のガスケツトを係合固着したもの
である。
In order to achieve the above object, in the plunger for a syringe of the present invention, a cylindrical part is formed at the tip of the plunger body, two or more axially symmetrical slits are bored in the cylindrical part downward from the tip, and An elastomer gasket having a sprue formed during molding is engaged and fixed at the tip of the cylindrical part.
そして、上記基体の筒状の周縁部に半径方向に
指向して軸対称にリブを設けてもよい。 Further, ribs may be provided on the cylindrical peripheral edge of the base body oriented in the radial direction and axially symmetrical.
プランジヤー本体の筒状部にエラストマー製の
ガスケツトを係止すると、エラストマー製のガス
ケツトが係止時に一端伸び、係止後に縮んで復元
するため、筒状部の先端に成型時生じたスプルー
を有するエラストマー製のガスケツトが係合固着
され、ガスケツトがプランジヤー本体から離脱す
ることなく確実に係止される。
When an elastomer gasket is locked to the cylindrical part of the plunger body, the elastomer gasket expands at one end and then contracts and returns to its original state after locking. The gasket made of the plunger is engaged and fixed, and the gasket is securely locked without coming off from the plunger body.
つぎに、ガスケツトを係止した注射器用プラン
ジヤーをバレルに挿入すると、ガスケツトがバレ
ルに接して内方に押され、このため、ガスケツト
が、縮むことにより、スリツト間の筒状部を内方
に押すため、スリツト間の筒状部が内方へ弾性変
形を生じ、ガスケツトがバレルに接触した状態に
おいて、ガスケツトとバレル間の液もれを防止す
る。 Next, when the syringe plunger with the gasket locked is inserted into the barrel, the gasket contacts the barrel and is pushed inward, causing the gasket to contract and push the cylindrical portion between the slits inward. Therefore, the cylindrical portion between the slits is elastically deformed inward, and when the gasket is in contact with the barrel, liquid leakage between the gasket and the barrel is prevented.
そして、ガスケツトを取り付けた注射器用プラ
ンジヤーをバレルから引き出してもガスケツトは
プランジヤー本体から離脱されない。 Even if the syringe plunger with the gasket attached is pulled out of the barrel, the gasket will not be separated from the plunger body.
そして、筒状の周縁部に半径方向に指向して軸
対称にリブを設けると、スリツト間の周縁部が補
強される。 By providing ribs oriented in the radial direction and axially symmetrical on the circumferential edge of the cylindrical shape, the circumferential edge between the slits is reinforced.
この発明の一実施例を第１図ないし第１３図を
参照して説明する。
An embodiment of the present invention will be described with reference to FIGS. 1 to 13.
前記従来例第２８図ないし第３０図と同一（相
当）構成要素は同一符号で表わし、重複説明をさ
ける。 Components that are the same as (corresponding to) those of the conventional example shown in FIGS. 28 to 30 are indicated by the same reference numerals to avoid redundant explanation.
図において、１０はプランジヤー本体４の先端
１０ａを筒状に形成した筒状部、１１はこの筒状
部１０の周縁部、１２はこの周縁部１１の外周に
沿つて設けた凹環状の係止部、１３は前記筒状部
１０に設けたスリツトで、このスリツト１３は周
縁部１１より内方に向けて、末廣がり状であつ
て、軸対称に二以上設けてある。１４は後述のガ
スケツト１５の外周縁１５ａより僅かに下方に向
いかつ内側に突出した凸環状の鍔部で、前記プラ
ンジヤー本体４の係止部１２に嵌合係止される。
ガスケツト１５はエラストマーを用い、合成樹脂
射出成形手段によりつくられており、１６はこの
ガスケツト１５の成形時に生じたスプルーで、こ
のガスケツト１５はこのスプルー１６を切り離す
ことなく、ガスケツト１５の中心軸上に沿つて傘
の柄の状態を保持している。 In the figure, 10 is a cylindrical portion formed into a cylindrical tip 10a of the plunger body 4, 11 is a peripheral edge of this cylindrical portion 10, and 12 is a concave ring-shaped lock provided along the outer periphery of this peripheral edge 11. The slits 13 are provided in the cylindrical portion 10, and the slits 13 are tapered inward from the peripheral edge 11, and two or more slits 13 are provided axially symmetrically. Reference numeral 14 designates a convex annular flange that extends slightly downward and inward from an outer circumferential edge 15a of a gasket 15, which will be described later, and is fitted and locked into the locking portion 12 of the plunger body 4.
The gasket 15 is made of elastomer by synthetic resin injection molding, and 16 is a sprue produced during molding of the gasket 15.The gasket 15 can be placed on the central axis of the gasket 15 without separating the sprue 16. The shape of the umbrella handle is maintained along the line.
上記の構成になるのでプランジヤー本体４の凹
環状の係止部１２にエラストマー製のガスケツト
１５の凸環状の鍔部１４を挿入すると、エラスト
マー製のガスケツト１５の外周部１５ａが挿入時
に一端伸び、係止に伴つて縮んで復元するためガ
スケツト１５がプランジヤー本体４に確実に係合
固着され、離脱が防止される。 With the above structure, when the convex annular collar portion 14 of the elastomer gasket 15 is inserted into the concave annular locking portion 12 of the plunger body 4, the outer circumferential portion 15a of the elastomer gasket 15 expands at one end during insertion and engages. Since the gasket 15 contracts and returns to its original state as it stops, the gasket 15 is securely engaged with the plunger body 4 and is prevented from coming off.
つぎに、ガスケツト１５を係止た注射器用プラ
ンジヤー３をバレル２内に挿入して順次押入する
と、バレル２の奥端に行くにしたがつて径が小さ
くなつているので、ガスケツト１５の外周縁１５
ａは、内方に押圧されると同時に、周縁部１１の
スリツト１３のすきまｔは狭くなる。すなわち、
注射器用プランジヤー３をバレル２内に挿入する
過程でガスケツト１５の外周縁１５ａがバレル２
の内周面に接して内方に押され、このため、ガス
ケツト１５が縮むと同時に、プランジヤー本体４
のスリツト間の周縁部１１が内方へ弾性変形し、
全体としてガスケツト１５の外周縁１５ａがバレ
ル２の内周面に緊密に接触した状態を保持し、ガ
スケツト１５とバレル２間の液もれが防止され
る。 Next, when the syringe plunger 3 with the gasket 15 locked is inserted into the barrel 2 and pushed in one after another, the diameter becomes smaller toward the inner end of the barrel 2, so the outer peripheral edge 15 of the gasket 15
At the same time that a is pressed inward, the gap t between the slits 13 in the peripheral edge 11 becomes narrower. That is,
In the process of inserting the syringe plunger 3 into the barrel 2, the outer peripheral edge 15a of the gasket 15 is inserted into the barrel 2.
As a result, the gasket 15 contracts and at the same time the plunger body 4
The peripheral edge 11 between the slits is elastically deformed inward,
As a whole, the outer circumferential edge 15a of the gasket 15 is kept in close contact with the inner circumferential surface of the barrel 2, and liquid leakage between the gasket 15 and the barrel 2 is prevented.
この発明の一実施例によれば、先端１０ａ部分
を筒状に形成し、該筒状の周縁部１１に凹環状の
係止部１２を設け、軸対称設けた二以上のスリツ
ト１３を有したプランジヤー本体４と、該プラン
ジヤー本体４の係止部１２に係止される内方に向
う凸環状の鍔部１４を設け、成形時に生じたスプ
ルー１６を有したエラストマー製のガスケツト１
５を備え、プランジヤー本体４の係止部１２にガ
スケツト１５の鍔部１４を係止してなり、使用
時、ガスケツト１５とバレル２間の液もれを防止
できるように構成したことにより、ガスケツト１
５の外周縁１５ａがバレル２の内周面とよくフイ
ツトし、液もれを防止するとともに、注射器用プ
ランジヤー３の摺動操作を円滑にでき、また、ス
プルー１６を有したガスケツト１５を用いたの
で、ガスケツト１５の上面にスプルー１６を切断
して取り去つたゲート孔跡などのきずがなく平坦
であり、しかもスプルー１６を切断しないで、ガ
スケツト１５の案内として利用されるため、それ
だけエラストマー材料を節約でき、さらに、筒状
の周縁部１１に長手方向に指向して軸対称に二以
上のスリツト１３を有したので、筒状の周縁部１
１にガスケツト１５を係止時、筒状の周縁部１１
が内側に変形して収縮し易く、バレル２の径が少
し小さくなつても、前記エラストマー製がガスケ
ツト１５の変形に加えてバレル２に内周面にフイ
ツトするため、ガスケツト１５とバレル２間の液
もれを一層防止できる。 According to one embodiment of the present invention, the tip 10a is formed into a cylindrical shape, a concave annular locking part 12 is provided on the cylindrical peripheral edge 11, and two or more slits 13 are provided axially symmetrically. A gasket 1 made of elastomer, which includes a plunger body 4 and an inwardly projecting annular flange 14 that is engaged with a locking part 12 of the plunger body 4, and has a sprue 16 produced during molding.
5, the flange 14 of the gasket 15 is locked to the locking part 12 of the plunger body 4, and the gasket 15 is configured to prevent liquid leakage between the gasket 15 and the barrel 2 during use. 1
The outer circumferential edge 15a of the syringe 5 fits well with the inner circumferential surface of the barrel 2 to prevent liquid leakage and to allow smooth sliding operation of the syringe plunger 3. Therefore, the top surface of the gasket 15 is flat and free of any scratches such as the marks of the gate holes that were removed by cutting the sprue 16. Moreover, since the sprue 16 is used as a guide for the gasket 15 without cutting it, it requires less elastomer material. Furthermore, since the cylindrical peripheral edge part 11 has two or more axially symmetrical slits 13 oriented in the longitudinal direction, the cylindrical peripheral edge part 1
When the gasket 15 is locked to the cylindrical peripheral portion 11
Even if the diameter of the barrel 2 becomes a little smaller, the elastomer deforms the gasket 15 and fits the inner circumferential surface of the barrel 2, so the gap between the gasket 15 and the barrel 2 Liquid leakage can be further prevented.
プランジヤー本体４の凹環状の係止部１２にガ
スケツト１５の凸環状の鍔部１４を係止したこと
によりガスケツト１５を確実に固定し離脱するこ
となく係止できる。 By locking the convex annular collar portion 14 of the gasket 15 with the concave annular locking portion 12 of the plunger body 4, the gasket 15 can be securely fixed and locked without coming off.
（他の実施例）
上記実施例では周縁部１１に軸対称にスリツト
１３を６箇所設けた場合について説明したが、第
１４図ないし第２０図に示したように、スリツト
１３を軸対称に４箇所設けても同様な効果を奏す
る。(Other Embodiments) In the above embodiment, the case where the slits 13 are provided in six locations axially symmetrically on the peripheral portion 11 has been described, but as shown in FIGS. The same effect can be obtained even if it is provided in several places.
また、上記実施例では、スリツト１３の切欠量
を周縁部１１の高さの全長にわたつて設けたが、
全長にわたらないで、小さくしても良い。 Further, in the above embodiment, the cutout amount of the slit 13 is provided over the entire height of the peripheral edge portion 11;
It may be made smaller instead of spanning the entire length.
さらに、第２１図ないし第２６図に示す実施例
では、周縁部１１には半径方向に指向した軸対称
のリブ１７が設けられている。これにより周縁部
１１が補強される。周縁部１１に設けたリブ１７
の先端部１７ａ間にガスケツト１５のスプルー１
６が挟持されることによりガスケツト１５が所定
の位置で周縁部１１に保持される。 Furthermore, in the embodiment shown in FIGS. 21 to 26, the peripheral edge 11 is provided with axisymmetric ribs 17 oriented in the radial direction. This reinforces the peripheral edge 11. Rib 17 provided on peripheral portion 11
Sprue 1 of gasket 15 between tip 17a of
The gasket 15 is held in a predetermined position by the peripheral edge 11 by being held between the gaskets 6 and 6.
しかして、第２７図に示したように、ガスケツ
ト１５を帽子状に形成し、ガスケツト１５の外周
縁１５ａより僅かに下方に向い、かつ内側に突出
した凸環状の鍔部１４を突設し、さらに裏面中央
より下方に向けて棒状のスプルーを突出させる
と、ガスケツト１５がプランジヤー本体４の筒状
部１０を覆うように容易，確実に係止される。 As shown in FIG. 27, the gasket 15 is formed into a hat shape, and a convex annular flange 14 is provided to project slightly downward from the outer peripheral edge 15a of the gasket 15 and protrude inwardly. Furthermore, when the rod-shaped sprue is made to protrude downward from the center of the back surface, the gasket 15 is easily and reliably locked to cover the cylindrical portion 10 of the plunger body 4.
この発明は、以上に説明したように、構成され
ているので、以下に記載されるような効果を奏す
る。
Since the present invention is configured as described above, it produces the effects described below.
筒状部の先端に、エラストマー製のガスケツト
を係止したことにより、ガスケツトを筒状部に確
実に係止でき、エラストマー製のガスケツトを用
いたことにより、エラストマーガスケツトの弾性
変形によりバレルの内周面によくフイツトし、液
のもれを防止するとともに、プランジヤー本体の
摺動を円滑にできる。 By locking the elastomer gasket to the tip of the cylindrical part, the gasket can be securely locked to the cylindrical part, and by using the elastomer gasket, the inside of the barrel is prevented by elastic deformation of the elastomer gasket. It fits well to the circumferential surface, prevents liquid leakage, and allows the plunger body to slide smoothly.
また、スプルーを有したガスケツトを用いたこ
とにより、ガスケツトの上面にスプルーを切り離
したあとがなく平坦であり、しかもスプルーを切
断することなくそのままとし、案内として利用さ
れ、それだけエラストマー材料を節約できる。 Further, by using a gasket with a sprue, the upper surface of the gasket is flat without any traces of cutting the sprue, and the sprue is left as it is without being cut, and is used as a guide, so that the elastomer material can be saved accordingly.
さらに、筒状の周縁部に先端より下方に指向し
て軸対称にスリツトを有したことにより、筒状部
にガスケツトを係止時、筒状部が内側に変形し易
く、バレルの径が少し小さくなつていても変形し
て、さらに前記エラストマーの変形に加えガスケ
ツトの弾性変形によりバレル順応してフイツトす
るため、ガスケツトとバレル間の液もれ防止す
る。 Furthermore, since the cylindrical peripheral edge has an axially symmetrical slit pointing downward from the tip, the cylindrical part easily deforms inward when the gasket is locked to the cylindrical part, and the diameter of the barrel is slightly reduced. Even if it is small, it deforms, and in addition to the deformation of the elastomer, the gasket adapts to the barrel and fits, thereby preventing liquid leakage between the gasket and the barrel.
そして、筒状の周縁部に半径方向に指向して軸
対称にリブを設けると、スリツト間の周縁部を補
強できる。 By providing ribs oriented in the radial direction and axially symmetrical on the cylindrical peripheral edge, the peripheral edge between the slits can be reinforced.
しかして、ガスケツトを帽子状に形成し、ガス
ケツトの外周縁より僅かに下方に向い、かつ内側
に突出した凸環状の鍔部を突設し、さらに裏面中
央より下方に向けて棒状のスプルーを突出させる
と、ガスケツトをプランジヤー本体に一層容易，
確実に係止できる。 Thus, the gasket is formed into a hat shape, and a convex annular flange is provided that projects slightly downward and inward from the outer periphery of the gasket, and a rod-shaped sprue is further protruded downward from the center of the back surface. This makes it easier to insert the gasket into the plunger body.
Can be locked securely.
第１図はこの発明の一実施例の注射器用プラン
ジヤーを示す正断面図、第２図は同注射器用プラ
ンジヤーを示す側面図、第３図は同第２図におけ
る−断面図、第４図は同注射器用プランジヤ
ーにガスケツトを取り付け状態を示す部分断面
図、第５図は同注射器用プランジヤーを示す斜視
図、第６図は同正面図、第７図は同側面図、第８
図は第６図−断面図、第９図は同−
断面図、第１０図は同第７図−断面図、第１
１図は同−断面図、第１２図はガスケツ
トを示す断面図、第１３図は同側面図、第１４図
はスリツトを４個設けた基体を示す注射器用プラ
ンジヤーを示す斜視図、第１５図は同正面図、第
１６図は同側面図、第１７図は同第１５図−
断面図、第１８図は同−断面図、第
１９図は同第１６図−断面図、第２０図
は同−断面図、第２１図はリブを設けた
基体を示す注射器用プランジヤーを示す正面図、
第２２図は同側面図、第２３図は同第２１図
−断面図、第２４図は同−
断面図、第２５図は同第２２図−断
面図、第２６図は同−断面図、第２
７図は同正断面図、第２８図ないし第３０図は従
来例を示す説明図である。
１……注射器、２……バレル、３……注射器用
プランジヤー、４……プランジヤー本体、１０ａ
……先端、１１……周縁部、１２……係止部、１
３……スリツト、１４……鍔部、１５……ガスケ
ツト、１６……スプルー、１７……リブ。
FIG. 1 is a front sectional view showing a plunger for a syringe according to an embodiment of the present invention, FIG. 2 is a side view showing the plunger for a syringe, FIG. 3 is a cross-sectional view taken from FIG. 2, and FIG. FIG. 5 is a perspective view showing the syringe plunger, FIG. 6 is a front view, FIG. 7 is a side view, and FIG.
The figure is Fig. 6 - sectional view, and Fig. 9 is the same -
The sectional view, Figure 10, is the same as Figure 7 - sectional view, 1st
FIG. 1 is a sectional view of the same, FIG. 12 is a sectional view showing the gasket, FIG. 13 is a side view of the same, FIG. 14 is a perspective view of a syringe plunger showing a base provided with four slits, and FIG. 15. is the same front view, Fig. 16 is the same side view, and Fig. 17 is the same Fig. 15-
18 is a sectional view of the same, FIG. 19 is a sectional view of the same as FIG. figure,
Fig. 22 is a side view of the same, Fig. 23 is a sectional view of the same as Fig. 21, and Fig. 24 is a sectional view of the same.
25 is a cross-sectional view of the same figure 22, FIG. 26 is a cross-sectional view of the same figure,
FIG. 7 is a front sectional view of the same, and FIGS. 28 to 30 are explanatory views showing conventional examples. 1...Syringe, 2...Barrel, 3...Plunger for syringe, 4...Plunger body, 10a
... Tip, 11 ... Peripheral part, 12 ... Locking part, 1
3...slit, 14...flange, 15...gasket, 16...sprue, 17...rib.
Claims (1)
出する注射器用プランジヤーであつて、プランジ
ヤー本体の先端に筒状部を形成し、この筒状部に
先端より下方に向う軸対称の二以上のスリツトを
穿ち、前記筒状部に先端に成型時に生じたスプル
ーを有するエラストマー製のガスケツトを係合固
着して成ることを特徴とする注射器用プランジヤ
ー。 ２ 筒状の周縁部に半径方向に指向して軸対称に
リブを設けた請求項１記載の注射器用プランジヤ
ー。 ３ ガスケツトを帽子状に形成し、外周縁より僅
かに下方に向い、かつ内方に突出した凸環状の鍔
部を突設し、さらに裏面中央より下方に向けて帽
状のスプルーを突出させた請求項１記載の注射器
用プランジヤー。[Scope of Claims] 1. A plunger for a syringe that is slidably inserted into a barrel and dispenses an inhaled liquid, which has a cylindrical part formed at the tip of the plunger body, and a cylindrical part formed below the tip. 1. A plunger for a syringe, comprising two or more axially symmetrical slits facing toward the cylindrical portion, and an elastomer gasket having a sprue formed during molding at the tip thereof is engaged and fixed to the cylindrical portion. 2. The plunger for a syringe according to claim 1, further comprising ribs oriented in the radial direction and axially symmetrical on the peripheral edge of the cylindrical shape. 3. The gasket is formed into a hat shape, and has a convex annular flange that points slightly downward from the outer periphery and projects inward, and further has a cap-shaped sprue that projects downward from the center of the back surface. The plunger for a syringe according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1032871A JPH02213358A (en) | 1989-02-14 | 1989-02-14 | Plunger for syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1032871A JPH02213358A (en) | 1989-02-14 | 1989-02-14 | Plunger for syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02213358A JPH02213358A (en) | 1990-08-24 |
| JPH0434910B2 true JPH0434910B2 (en) | 1992-06-09 |
Family
ID=12370930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1032871A Granted JPH02213358A (en) | 1989-02-14 | 1989-02-14 | Plunger for syringe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02213358A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013208457A (en) * | 2013-05-27 | 2013-10-10 | Hamilton Bonaduz Ag | Radially sliding seal element for measuring device, and measuring device provided with the radially sliding seal element |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4947258B2 (en) * | 2005-11-02 | 2012-06-06 | 味の素株式会社 | Plunger for syringe |
| EP2364216B1 (en) | 2008-11-05 | 2017-04-05 | Hamilton Bonaduz AG | Metering device having a radial sliding seal component |
| JP5646004B2 (en) * | 2013-05-27 | 2014-12-24 | ハミルトン・ボナドゥーツ・アーゲー | Radial sliding seal element for a weighing device and a weighing device having such a radial sliding seal element |
| JP6054489B2 (en) * | 2015-08-19 | 2016-12-27 | ハミルトン・ボナドゥーツ・アーゲー | Radial sliding seal element for a weighing device and a weighing device having such a radial sliding seal element |
-
1989
- 1989-02-14 JP JP1032871A patent/JPH02213358A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013208457A (en) * | 2013-05-27 | 2013-10-10 | Hamilton Bonaduz Ag | Radially sliding seal element for measuring device, and measuring device provided with the radially sliding seal element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02213358A (en) | 1990-08-24 |
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