JP2021029856A

JP2021029856A - Syringe pump

Info

Publication number: JP2021029856A
Application number: JP2019155901A
Authority: JP
Inventors: 彰太関口; Shota Sekiguchi
Original assignee: Terumo Corp
Current assignee: Terumo Corp
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2021-03-01
Anticipated expiration: 2039-08-28
Also published as: JP7307629B2

Abstract

To provide a syringe pump including a cover member having an outer surface shape facilitating cleaning while retaining deformation performance.SOLUTION: A syringe pump includes: a pusher engaging member; a move member connected to the pusher engaging member, and movable with the pusher engaging member; and an annular cover member 7 covering the move member. The cover member 7 has a plurality of deformation unit parts deformable in a central axis direction. The deformation unit part is composed of: two first ridge portions 51a forming an angle larger than 0° and 90° or less with respect to the central axis direction in a front view, and arranged at an interval; two second ridge portions 51b forming an angle larger than 0° with respect to the central axis direction, and smaller than that of the first ridge portions 51a, and extending across the two first ridge portions 51a; and deformed recesses 52 surrounded by the two first ridge portions 51a and the two second ridge portions 51b, and deformed in the central axis direction.SELECTED DRAWING: Figure 5

Description

本開示はシリンジポンプに関する。 The present disclosure relates to a syringe pump.

シリンジポンプは、例えば集中治療室（ＩＣＵ）等で使用されて、患者に対して抗がん剤、麻酔剤、化学療法剤、輸血、栄養剤等の薬液の送液処置を、高い精度で比較的長時間行うことに用いられる。シリンジポンプの薬液の流量制御（注入量（ｍＬ）や注入速度（ｍＬ／ｈ）の制御）は、他の輸液ポンプに比較して精密で優れている。特許文献１にはこの種のシリンジポンプが開示されている。 Syringe pumps are used, for example, in intensive care units (ICUs) to compare patients with highly accurate delivery of chemicals such as anticancer drugs, anesthetics, chemotherapeutic agents, blood transfusions, and nutritional supplements. It is used to perform for a long time. The flow rate control of the chemical solution of the syringe pump (control of the injection amount (mL) and the injection rate (mL / h)) is precise and superior to other infusion pumps. Patent Document 1 discloses this type of syringe pump.

また、特許文献１に示すシリンジポンプには、送りネジを覆っておりスライダがシリンジ本体側に移動するのに伴って弾性変形して圧縮可能なブーツが開示されている。 Further, the syringe pump shown in Patent Document 1 discloses a boot that covers a feed screw and is elastically deformed and compressible as the slider moves toward the syringe body.

国際公開第２０１４／０２４２３５号International Publication No. 2014/024235

特許文献１に記載されているカバー部材としてのブーツは、蛇腹状に連続する凸部分を備える。ブーツの外表面に薬液等が付着する場合がある。この場合、医療従事者等によって付着した薬液が拭き取られる。しかしながら、特許文献１に記載のブーツは、外表面の清掃効率の観点で、更なる改善の余地がある。 The boot as a cover member described in Patent Document 1 includes a bellows-like continuous convex portion. Chemicals may adhere to the outer surface of the boots. In this case, the chemical solution adhered by a medical worker or the like is wiped off. However, the boots described in Patent Document 1 have room for further improvement from the viewpoint of cleaning efficiency of the outer surface.

本開示は、変形性能を保持しつつ、清掃し易い外表面の形状を有するカバー部材を備えるシリンジポンプを提供することを目的とする。 It is an object of the present disclosure to provide a syringe pump provided with a cover member having an outer surface shape that is easy to clean while maintaining deformation performance.

本開示の第１の態様としてのシリンジポンプは、シリンジを装着可能であり、前記シリンジ内に充填されている薬液を患者に送液可能なシリンジポンプであって、前記シリンジが装着されている状態で、前記シリンジの押子を前記シリンジのシリンジ本体に対して移動させる押子駆動部を備え、前記押子駆動部は、前記シリンジの前記押子と係合する押子係合部材と、前記押子係合部材と連結され、前記押子係合部材と共に移動可能な移動部材と、前記移動部材を覆い、前記移動部材の移動に伴い中心軸線方向に変形可能な環状のカバー部材と、を備え、前記カバー部材は、面同士が交差する稜線により形成される尾根部が外縁となって画定される、前記中心軸線方向に変形可能な複数の変形ユニット部を備え、前記変形ユニット部は、正面視において、前記中心軸線方向に対して０°より大きく９０°以下の角度を成し、間隔を隔てて配置されている２つの第１尾根部と、前記中心軸線方向に対して０°より大きく、前記第１尾根部よりも小さい角度を成し、前記２つの第１尾根部に跨って延在する２つの第２尾根部と、前記２つの第１尾根部及び前記２つの第２尾根部により囲まれ、前記中心軸線方向に変形する変形凹部と、により構成されている。 The syringe pump as the first aspect of the present disclosure is a syringe pump capable of mounting a syringe and sending a drug solution filled in the syringe to a patient, and the state in which the syringe is mounted. A pusher driving unit for moving the pusher of the syringe with respect to the syringe body of the syringe is provided, and the pusher driving part includes a pusher engaging member that engages with the pusher of the syringe and the pusher engaging member. A moving member that is connected to the pusher engaging member and can move together with the pusher engaging member, and an annular cover member that covers the moving member and is deformable in the central axis direction as the moving member moves. The cover member includes a plurality of deformable unit portions that can be deformed in the central axis direction, in which a ridge portion formed by ridges intersecting the surfaces is defined as an outer edge, and the deformable unit portion includes. In front view, two first ridges that form an angle of 90 ° or less greater than 0 ° with respect to the central axis direction and are arranged at intervals, and from 0 ° with respect to the central axis direction. Two second ridges that are large and have an angle smaller than that of the first ridge and extend across the two first ridges, the two first ridges, and the two second ridges. It is composed of a deformed recess surrounded by a portion and deformed in the direction of the central axis.

本開示の１つの実施形態として、前記変形ユニット部の正面視において、前記２つの第１尾根部は略平行に延在している。 As one embodiment of the present disclosure, the two first ridge portions extend substantially in parallel in the front view of the deformation unit portion.

本開示の１つの実施形態として、前記変形ユニット部の正面視において、前記２つの第１尾根部は、前記中心軸線方向に対して略直交して延在している。 As one embodiment of the present disclosure, in the front view of the deformation unit portion, the two first ridge portions extend substantially orthogonal to the central axis direction.

本開示の１つの実施形態として、前記変形ユニット部の正面視において、前記２つの第２尾根部は略平行に延在している。 As one embodiment of the present disclosure, the two second ridge portions extend substantially in parallel in the front view of the deformation unit portion.

本開示の１つの実施形態として、前記複数の変形ユニット部は、前記第１尾根部の延在方向に沿って連接されており、前記第１尾根部の延在方向で連接される２つの変形ユニット部は、１つの前記第２尾根部を共有することで前記第１尾根部の延在方向に連接されている。 As one embodiment of the present disclosure, the plurality of deformation unit portions are connected along the extending direction of the first ridge portion, and two deformations connected in the extending direction of the first ridge portion. The unit portions are connected in the extending direction of the first ridge portion by sharing one second ridge portion.

本開示の１つの実施形態として、前記複数の変形ユニット部は、前記第２尾根部の延在方向に沿って連接されており、前記第２尾根部の延在方向で連接される２つの変形ユニット部は、１つの前記第１尾根部を共有することで前記第２尾根部の延在方向に連接されている。 As one embodiment of the present disclosure, the plurality of deformation unit portions are connected along the extending direction of the second ridge portion, and two deformations connected in the extending direction of the second ridge portion. The unit portions are connected in the extending direction of the second ridge portion by sharing one first ridge portion.

本開示の１つの実施形態として、前記２つの第１尾根部は別々の環状凸部により構成されている。 In one embodiment of the present disclosure, the two first ridges are configured by separate annular protrusions.

本開示の１つの実施形態として、前記変形凹部は、前記第１尾根部及び前記第２尾根部とは径方向の反対側に向かって突出する稜線により形成される谷部を備え、前記変形ユニット部の正面視において、前記谷部は、前記変形ユニット部の前記第１尾根部と前記第２尾根部との交点同士を結ぶ対角線のうち、前記中心軸線方向に対して、前記第１尾根部よりも小さく、かつ、前記第２尾根部よりも大きい角度を成す対角線により構成されている。 As one embodiment of the present disclosure, the deformed recess comprises a valley formed by a ridge that projects radially opposite to the first ridge and the second ridge, and the deformed unit. In the front view of the portion, the valley portion is the first ridge portion of the diagonal line connecting the intersections of the first ridge portion and the second ridge portion of the deformation unit portion with respect to the central axis direction. It is composed of diagonal lines that are smaller than the size of the second ridge and form an angle larger than that of the second ridge.

本開示の１つの実施形態として、前記変形ユニット部を第１変形ユニット部とした場合に、前記カバー部材は、前記中心軸線方向と直交する平面に対して前記第１変形ユニット部と面対称となる第２変形ユニット部を複数備え、前記カバー部材は、前記中心軸線方向において、前記第１変形ユニット部のみから構成される第１領域と、前記第２変形ユニット部のみから構成される第２領域と、を含む。 As one embodiment of the present disclosure, when the deformable unit portion is used as the first deformable unit portion, the cover member is plane-symmetrical with the first deformable unit portion with respect to a plane orthogonal to the central axis direction. The cover member is provided with a plurality of second deformation unit portions, and the cover member has a first region composed of only the first deformation unit portion and a second cover member composed of only the second deformation unit portion in the central axis direction. Includes areas and.

本開示の第２の態様としてのシリンジポンプは、シリンジを装着可能であり、前記シリンジ内に充填されている薬液を患者に送液可能なシリンジポンプであって、前記シリンジが装着されている状態で、前記シリンジの押子を前記シリンジのシリンジ本体に対して移動させる押子駆動部を備え、前記押子駆動部は、前記シリンジの前記押子と係合する押子係合部材と、前記押子係合部材と連結され、前記押子係合部材と共に移動可能な移動部材と、前記移動部材を覆い、前記移動部材の移動に伴い中心軸線方向に変形可能な環状のカバー部材と、を備え、前記カバー部材は、径方向の外側に向かって突出し、周方向全域に亘って無端状に延在する稜線により形成されている複数の環状凸部と、前記径方向の外側に向かって突出し、前記中心軸線方向に対して傾斜して延在する稜線により形成されている複数の傾斜凸部と、を備え、前記複数の環状凸部のうち前記中心軸線方向に隣接する２つの環状凸部は、前記複数の傾斜凸部のうち少なくとも２つの傾斜凸部と交差している。 The syringe pump as the second aspect of the present disclosure is a syringe pump capable of mounting a syringe and sending a drug solution filled in the syringe to a patient, and the state in which the syringe is mounted. A pusher driving unit for moving the pusher of the syringe with respect to the syringe body of the syringe is provided, and the pusher driving part includes a pusher engaging member that engages with the pusher of the syringe and the pusher engaging member. A moving member that is connected to the syringe engaging member and can move together with the syringe engaging member, and an annular cover member that covers the moving member and is deformable in the central axis direction as the moving member moves. The cover member is provided with a plurality of annular protrusions formed by ridges extending radially outward and extending in an endless manner over the entire circumferential direction, and projecting outward in the radial direction. A plurality of inclined convex portions formed by ridges extending in an inclined direction with respect to the central axis direction, and two annular convex portions adjacent to the central axis direction among the plurality of annular convex portions. Intersects at least two inclined convex portions out of the plurality of inclined convex portions.

本開示によれば、変形性能を保持しつつ、清掃し易い外表面の形状を有するカバー部材を備えるシリンジポンプを提供することができる。 According to the present disclosure, it is possible to provide a syringe pump provided with a cover member having an outer surface shape that is easy to clean while maintaining deformation performance.

一実施形態としてのシリンジポンプの斜視図である。It is a perspective view of the syringe pump as one Embodiment. 図１に示すシリンジポンプの押子駆動部を示す図である。It is a figure which shows the pusher drive part of the syringe pump shown in FIG. シリンジが装着されている状態の図１に示すシリンジポンプの一側面を示す側面図である。It is a side view which shows one side surface of the syringe pump shown in FIG. 1 in the state which a syringe is attached. 図１に示すシリンジポンプの図３と同一側面であって、図３に示す状態から押子係合部材及び移動部材をシリンジ本体側に移動させた状態を示す側面図である。It is the same side surface as FIG. 3 of the syringe pump shown in FIG. 1, and is a side view showing a state in which the pusher engaging member and the moving member are moved to the syringe body side from the state shown in FIG. 図１に示すシリンジポンプのカバー部材を径方向の外側から見た側面図である。It is a side view which looked at the cover member of the syringe pump shown in FIG. 1 from the outside in the radial direction. 図５に示すカバー部材の変形例としてのカバー部材の側面図である。It is a side view of the cover member as a modification of the cover member shown in FIG. 図５と同様のカバー部材の側面図であって、中心軸線方向に圧縮変形する際の各部位の動作を説明するための図である。It is a side view of the cover member which is the same as FIG.

以下、本開示に係るシリンジポンプの実施形態について図面を参照して説明する。各図において共通する部材・部位には同一の符号を付している。 Hereinafter, embodiments of the syringe pump according to the present disclosure will be described with reference to the drawings. The same reference numerals are given to common members and parts in each figure.

まず、本開示に係るシリンジポンプの一実施形態としてのシリンジポンプ１の概要について説明する。図１は、シリンジポンプ１の斜視図である。図１では、シリンジポンプ１に加えて、シリンジポンプ１に装着可能なシリンジ１００を併せて示している。図２は、シリンジポンプ１の押子駆動部２を示す図である。図２では、説明の便宜上、カバー部材７を省略している。 First, an outline of the syringe pump 1 as an embodiment of the syringe pump according to the present disclosure will be described. FIG. 1 is a perspective view of the syringe pump 1. In FIG. 1, in addition to the syringe pump 1, the syringe 100 that can be attached to the syringe pump 1 is also shown. FIG. 2 is a diagram showing a pusher drive unit 2 of the syringe pump 1. In FIG. 2, the cover member 7 is omitted for convenience of explanation.

シリンジポンプ１は、例えば集中治療室等で使用され、患者に対して、例えば抗がん剤、麻酔剤、化学療法剤、輸血、栄養剤等の薬液の微量注入処置を、高い精度で比較的長時間行うことに用いられる微量持続注入ポンプである。 The syringe pump 1 is used in, for example, an intensive care unit, and can relatively inject a small amount of a drug solution such as an anticancer agent, an anesthetic, a chemotherapeutic agent, a blood transfusion, or a nutritional agent into a patient with high accuracy. It is a micro continuous injection pump used for long-term treatment.

図１に示すように、シリンジポンプ１には、薬液が充填されているシリンジ１００を装着可能である。具体的に、シリンジ１００は、シリンジ本体１０１と、押子１０２と、を備える。シリンジ本体１０１は、充填された薬液を収容する収容空間１０３を区画している。シリンジ本体１０１の先端部には、収容空間１０３に連通する排出口１０４が形成されている。シリンジ本体１０１に対して押子１０２を押し込むことで、収容空間１０３内の薬液が排出口１０４から排出される。シリンジポンプ１は、シリンジ１００の押子１０２の動作を制御する。排出口１０４から排出される薬液は、例えば排出口１０４に連結される医療用チューブ１０５を通じて、生体内に投与される。このように、シリンジポンプ１を用いることで、シリンジ１００内に充填されている薬液を、流量制御（注入量（ｍＬ）や注入速度（ｍＬ／ｈ）の制御）しながら、患者に送液可能である。シリンジポンプ１の流路制御は、例えば、シリンジポンプ１の正面に配置されているタッチパネル２０ａへの入力操作等により実行可能である。また、シリンジポンプ１による送液開始及び停止は、例えば、シリンジポンプ１の正面に配置されている各種ボタン２０ｂを操作することにより実行可能である。 As shown in FIG. 1, a syringe 100 filled with a chemical solution can be attached to the syringe pump 1. Specifically, the syringe 100 includes a syringe body 101 and a pusher 102. The syringe body 101 partitions a storage space 103 for accommodating the filled chemical solution. A discharge port 104 communicating with the accommodation space 103 is formed at the tip of the syringe body 101. By pushing the pusher 102 into the syringe body 101, the chemical solution in the accommodation space 103 is discharged from the discharge port 104. The syringe pump 1 controls the operation of the pusher 102 of the syringe 100. The drug solution discharged from the discharge port 104 is administered into the living body through, for example, a medical tube 105 connected to the discharge port 104. In this way, by using the syringe pump 1, the chemical solution filled in the syringe 100 can be sent to the patient while controlling the flow rate (control of the injection amount (mL) and the injection rate (mL / h)). Is. The flow path control of the syringe pump 1 can be executed, for example, by an input operation to the touch panel 20a arranged in front of the syringe pump 1. Further, the start and stop of liquid feeding by the syringe pump 1 can be executed, for example, by operating various buttons 20b arranged on the front surface of the syringe pump 1.

図１、図２に示すように、シリンジポンプ１は押子駆動部２を備える。押子駆動部２は、シリンジポンプ１に対してシリンジ１００が装着されている状態で、シリンジ１００の押子１０２をシリンジ１００のシリンジ本体１０１に対して移動させることができる。本実施形態では、図１に示すように、シリンジポンプ１のハウジング３の外面に、シリンジ本体１０１の外周面を受ける受け部３ａが設けられている。本実施形態のハウジング３は、耐薬品性を有する成型樹脂材料により一体成型されている。本実施形態のシリンジポンプ１では、シリンジ本体１０１がハウジング３の受け部３ａとクランプ４とにより挟み込まれることで、シリンジ本体１０１はシリンジポンプ１に対して固定される。但し、シリンジポンプ１に対するシリンジ本体１０１の固定位置及び固定手段は、本実施形態の固定位置及び固定手段に限定されない。 As shown in FIGS. 1 and 2, the syringe pump 1 includes a pusher drive unit 2. The pusher drive unit 2 can move the pusher 102 of the syringe 100 with respect to the syringe body 101 of the syringe 100 while the syringe 100 is attached to the syringe pump 1. In the present embodiment, as shown in FIG. 1, a receiving portion 3a for receiving the outer peripheral surface of the syringe body 101 is provided on the outer surface of the housing 3 of the syringe pump 1. The housing 3 of the present embodiment is integrally molded with a molded resin material having chemical resistance. In the syringe pump 1 of the present embodiment, the syringe body 101 is fixed to the syringe pump 1 by being sandwiched between the receiving portion 3a of the housing 3 and the clamp 4. However, the fixing position and fixing means of the syringe body 101 with respect to the syringe pump 1 are not limited to the fixing position and fixing means of the present embodiment.

図１、図２に示すように、押子駆動部２は、押子係合部材５と、移動部材６と、環状のカバー部材７と、駆動源８と、送りねじ９と、フレーム本体１０と、を備える。 As shown in FIGS. 1 and 2, the pusher drive unit 2 includes a pusher engaging member 5, a moving member 6, an annular cover member 7, a drive source 8, a feed screw 9, and a frame body 10. And.

図３、図４は、シリンジ１００が装着されている状態のシリンジポンプ１の一側面を示す側面図である。図４は、図３に示す状態から押子係合部材５及び移動部材６をシリンジ本体１０１側に移動させた状態を示している。図３、図４に示すように、押子係合部材５は、シリンジ１００の押子１０２と係合する。本実施形態の押子係合部材５は、シリンジ１００の押子１０２をシリンジ本体１０１側に押圧して移動させるスライダにより構成されている。 3 and 4 are side views showing one side surface of the syringe pump 1 in a state where the syringe 100 is mounted. FIG. 4 shows a state in which the pusher engaging member 5 and the moving member 6 are moved to the syringe body 101 side from the state shown in FIG. As shown in FIGS. 3 and 4, the pusher engaging member 5 engages with the pusher 102 of the syringe 100. The pusher engaging member 5 of the present embodiment is composed of a slider that pushes and moves the pusher 102 of the syringe 100 toward the syringe body 101.

図２〜図４に示すように、移動部材６は、押子係合部材５と連結され、押子係合部材５と共に移動可能である。移動部材６は、押子係合部材５としてのスライダと共に、シリンジ本体１０１側に移動する。より具体的に、本実施形態の移動部材６は、軸部材１２と、動力伝達部材１３と、を備える。 As shown in FIGS. 2 to 4, the moving member 6 is connected to the pusher engaging member 5 and can move together with the pusher engaging member 5. The moving member 6 moves toward the syringe body 101 side together with the slider as the pusher engaging member 5. More specifically, the moving member 6 of the present embodiment includes a shaft member 12 and a power transmission member 13.

図２に示すように、軸部材１２は、押子係合部材５としてのスライダに連結されている。また、軸部材１２は、シリンジポンプ１に装着されている状態のシリンジ１００の長手方向Ａに略平行して延在している。軸部材１２は、フレーム本体１０により、長手方向Ａに移動可能に支持されている。 As shown in FIG. 2, the shaft member 12 is connected to the slider as the pusher engaging member 5. Further, the shaft member 12 extends substantially parallel to the longitudinal direction A of the syringe 100 in a state of being mounted on the syringe pump 1. The shaft member 12 is movably supported in the longitudinal direction A by the frame body 10.

図２に示すように、動力伝達部材１３は、送りねじ９に対して螺合されている。換言すれば、動力伝達部材１３は、送りねじ９により支持されている。また、動力伝達部材１３は、軸部材１２に対して固定されている。駆動源８としての電動モータは、送りねじ９を中心軸線周りに回動させる動力を発生する。送りねじ９の外表面には、螺旋状に延在する雄ねじ部９ａが形成されている。送りねじ９は、長手方向Ａに略平行に延在している。動力伝達部材１３は、駆動源８の動力により送りねじ９が回動することで、長手方向Ａに移動することができる。そのため、動力伝達部材１３に固定されている軸部材１２も、動力伝達部材１３と共に長手方向Ａに移動することができる。 As shown in FIG. 2, the power transmission member 13 is screwed into the feed screw 9. In other words, the power transmission member 13 is supported by the feed screw 9. Further, the power transmission member 13 is fixed to the shaft member 12. The electric motor as the drive source 8 generates power to rotate the feed screw 9 around the central axis. On the outer surface of the lead screw 9, a male screw portion 9a extending spirally is formed. The lead screw 9 extends substantially parallel to the longitudinal direction A. The power transmission member 13 can move in the longitudinal direction A by rotating the feed screw 9 by the power of the drive source 8. Therefore, the shaft member 12 fixed to the power transmission member 13 can also move in the longitudinal direction A together with the power transmission member 13.

本実施形態の動力伝達部材１３は、送りねじ９に加えて、フレーム本体１０により、長手方向Ａに移動可能に支持されている。具体的に、本実施形態のフレーム本体１０は案内部材１１を備える。案内部材１１は、動力伝達部材１３と係合することで、動力伝達部材１３が送りねじ９の中心軸線周りを送りねじ９と共に回動することを規制する。また、案内部材１１は、動力伝達部材１３と係合することで、動力伝達部材１３の移動方向が長手方向Ａのみになるようにガイドする。より具体的に、本実施形態の案内部材１１は、動力伝達部材１３を貫き長手方向Ａに延在する案内軸部１１ａと、長手方向Ａに延在し、動力伝達部材１３の外面と当接して送りねじ９に対する回動を規制する回動規制部１１ｂと、を備える。動力伝達部材１３は、案内部材１１の案内軸部１１ａ及び回動規制部１１ｂにより、長手方向Ａのみにガイドされて移動することができる。但し、案内部材１１は本実施形態で示す構成に限定されない。 The power transmission member 13 of the present embodiment is movably supported in the longitudinal direction A by the frame body 10 in addition to the feed screw 9. Specifically, the frame body 10 of this embodiment includes a guide member 11. By engaging with the power transmission member 13, the guide member 11 regulates the power transmission member 13 from rotating around the central axis of the feed screw 9 together with the feed screw 9. Further, the guide member 11 is engaged with the power transmission member 13 to guide the power transmission member 13 so that the moving direction is only the longitudinal direction A. More specifically, the guide member 11 of the present embodiment comes into contact with the guide shaft portion 11a that penetrates the power transmission member 13 and extends in the longitudinal direction A and the guide shaft portion 11a that extends in the longitudinal direction A and abuts on the outer surface of the power transmission member 13. A rotation restricting unit 11b that regulates rotation with respect to the feed screw 9 is provided. The power transmission member 13 can be moved by being guided only in the longitudinal direction A by the guide shaft portion 11a and the rotation restricting portion 11b of the guide member 11. However, the guide member 11 is not limited to the configuration shown in this embodiment.

図１、図３、図４に示すように、環状のカバー部材７は、移動部材６を覆っている。より具体的に、本実施形態のカバー部材７は、図２に示す移動部材６の軸部材１２の周囲を覆っている。また、図３、図４に示すように、カバー部材７は、移動部材６の移動に伴い、中心軸線Ｏに平行な中心軸線方向Ｂに変形可能である。ここで「カバー部材７の中心軸線方向Ｂ」とは、カバー部材７が移動部材６の軸部材１２の周囲を覆っている状態では、上述した長手方向Ａと同じ方向を意味している。より具体的に、本実施形態のカバー部材７は、押子係合部材５が長手方向Ａのシリンジ本体１０１側に移動することで、押子係合部材５とフレーム本体１０との間で、中心軸線方向Ｂに圧縮するように弾性変形する。 As shown in FIGS. 1, 3, and 4, the annular cover member 7 covers the moving member 6. More specifically, the cover member 7 of the present embodiment covers the periphery of the shaft member 12 of the moving member 6 shown in FIG. Further, as shown in FIGS. 3 and 4, the cover member 7 can be deformed in the central axis direction B parallel to the central axis O as the moving member 6 moves. Here, the "center axis direction B of the cover member 7" means the same direction as the longitudinal direction A described above in a state where the cover member 7 covers the periphery of the shaft member 12 of the moving member 6. More specifically, in the cover member 7 of the present embodiment, the pusher engaging member 5 moves toward the syringe body 101 in the longitudinal direction A, so that the pusher engaging member 5 and the frame body 10 can move between the pusher engaging member 5 and the frame body 10. It is elastically deformed so as to be compressed in the central axis direction B.

カバー部材７は、弾性変形により伸縮可能で、薬液や紫外線に対して殆ど劣化しない、例えば、シリコーンゴム，フッ素ゴムや熱可塑性エラストマーにより形成される。カバー部材７を設けることで、軸部材１２等の機械要素に薬液等が付着することを抑制できる。カバー部材７の詳細は後述する。 The cover member 7 is made of, for example, silicone rubber, fluororubber, or thermoplastic elastomer, which can be expanded and contracted by elastic deformation and hardly deteriorates with respect to chemicals and ultraviolet rays. By providing the cover member 7, it is possible to prevent chemicals and the like from adhering to mechanical elements such as the shaft member 12. Details of the cover member 7 will be described later.

駆動源８は、送りねじ９を中心軸線周りに回動させる動力を発生する。本実施形態の駆動源８は電動モータであるが、他の駆動源を用いてもよい。駆動源８から送りねじ９への動力は、例えば歯車列等の伝達機構１４を利用して伝達すればよい。 The drive source 8 generates power to rotate the lead screw 9 around the central axis. The drive source 8 of the present embodiment is an electric motor, but other drive sources may be used. The power from the drive source 8 to the feed screw 9 may be transmitted by using a transmission mechanism 14 such as a gear train.

フレーム本体１０は、上述した押子係合部材５及び移動部材６を、長手方向Ａに移動可能に支持している。また、駆動源８、送りねじ９及び伝達機構１４は、動作可能にフレーム本体１０に対して取り付けられている。シリンジポンプ１の外装材であるハウジング３は、フレーム本体１０に対して直接的又は間接的に固定されている。 The frame body 10 movably supports the pusher engaging member 5 and the moving member 6 described above in the longitudinal direction A. Further, the drive source 8, the feed screw 9, and the transmission mechanism 14 are operably attached to the frame main body 10. The housing 3, which is the exterior material of the syringe pump 1, is directly or indirectly fixed to the frame body 10.

フレーム本体１０は、軸部材１２を長手方向Ａに移動可能に内面で支持する挿通孔１０ａを区画している。この挿通孔１０ａは、フレーム本体１０のうち、押子係合部材５と長手方向Ａで対向する対向壁部１０ｂに形成されている。つまり、動力伝達部材１３が長手方向Ａに移動すると、軸部材１２は挿通孔１０ａ内を長手方向Ａに移動する。上述した本実施形態のカバー部材７は、押子係合部材５と、挿通孔１０ａが形成されているフレーム本体１０の対向壁部１０ｂと、の間に挟まれている。そして、押子係合部材５が長手方向Ａでシリンジ本体１０１側に移動すると、押子係合部材５とフレーム本体１０の対向壁部１０ｂとの間の長手方向Ａの距離が変動する。そのため、本実施形態のカバー部材７は、押子係合部材５とフレーム本体１０の対向壁部１０ｂとの間の変動する長手方向Ａの距離に応じて中心軸線方向Ｂに伸長又は収縮するように弾性変形する。本実施形態の対向壁部１０ｂは筒状部を含むが、筒状部を含まない構成であってもよく、対向壁部の形状は特に限定されない。 The frame body 10 defines an insertion hole 10a that supports the shaft member 12 on the inner surface so as to be movable in the longitudinal direction A. The insertion hole 10a is formed in the facing wall portion 10b of the frame main body 10 that faces the pusher engaging member 5 in the longitudinal direction A. That is, when the power transmission member 13 moves in the longitudinal direction A, the shaft member 12 moves in the insertion hole 10a in the longitudinal direction A. The cover member 7 of the present embodiment described above is sandwiched between the pusher engaging member 5 and the facing wall portion 10b of the frame body 10 in which the insertion hole 10a is formed. Then, when the pusher engaging member 5 moves toward the syringe body 101 in the longitudinal direction A, the distance in the longitudinal direction A between the pusher engaging member 5 and the facing wall portion 10b of the frame body 10 changes. Therefore, the cover member 7 of the present embodiment extends or contracts in the central axial direction B according to the fluctuating longitudinal direction A distance between the pusher engaging member 5 and the facing wall portion 10b of the frame body 10. Elastically deforms to. The facing wall portion 10b of the present embodiment includes a tubular portion, but may have a configuration that does not include the tubular portion, and the shape of the facing wall portion is not particularly limited.

以下、カバー部材７の詳細について説明する。 Hereinafter, the details of the cover member 7 will be described.

図５は、カバー部材７を径方向Ｃの外側から見た側面図である。図５では、外力が作用していない自然状態でのカバー部材７単体を示している。 FIG. 5 is a side view of the cover member 7 as viewed from the outside in the radial direction C. FIG. 5 shows a single cover member 7 in a natural state in which no external force is applied.

カバー部材７は、中心軸線方向Ｂに変形可能な複数の変形ユニット部５０を備えている。「変形ユニット部」とは、カバー部材の中心軸線方向の変形を実現するカバー部材における基準単位を意味している。換言すれば、変形ユニット部５０は、カバー部材７の周壁の所定位置に、所定の配置パターンで、所定の数だけ配置される。これにより、カバー部材７の中心軸線方向Ｂの所望の変形が実現される。以下、変形ユニット部５０の詳細について説明する。 The cover member 7 includes a plurality of deformation unit portions 50 that can be deformed in the central axis direction B. The “deformation unit portion” means a reference unit in a cover member that realizes deformation of the cover member in the central axis direction. In other words, a predetermined number of deformation unit portions 50 are arranged at predetermined positions on the peripheral wall of the cover member 7 in a predetermined arrangement pattern. As a result, the desired deformation of the cover member 7 in the central axis direction B is realized. Hereinafter, the details of the deformation unit unit 50 will be described.

図５では、カバー部材７全体の側面図に加えて、カバー部材７の１つの変形ユニット部５０の正面図を示している。変形ユニット部５０は、面同士が交差する稜線により形成される尾根部５１が外縁となって画定される。 In FIG. 5, in addition to the side view of the entire cover member 7, a front view of one deformation unit portion 50 of the cover member 7 is shown. The deformation unit portion 50 is defined by a ridge portion 51 formed by ridges where the surfaces intersect with each other as an outer edge.

より具体的に、変形ユニット部５０は、正面視（図５参照）において、２つの第１尾根部５１ａと、２つの第２尾根部５１ｂと、変形凹部５２と、により構成されている。つまり、本実施形態の変形ユニット部５０の外縁となる尾根部５１は、２つの第１尾根部５１ａ及び２つの第２尾根部５１ｂである。変形ユニット部５０の正面視とは、カバー部材７の径方向Ｃの外側から正対して見る変形ユニット部５０を意味する。なお、変形ユニット部５０の正面視の形状は、環状のカバー部材７をシート状に展開し、この展開体における変形ユニット部５０をシート厚み方向に沿って見た場合と同じ形状である。以下、「変形ユニット部５０の正面視」を単に「正面視」と記載する場合がある。 More specifically, the deformation unit portion 50 is composed of two first ridge portions 51a, two second ridge portions 51b, and a deformation recess 52 in a front view (see FIG. 5). That is, the ridge portion 51 that is the outer edge of the deformation unit portion 50 of the present embodiment is the two first ridge portions 51a and the two second ridge portions 51b. The front view of the deformation unit portion 50 means the deformation unit portion 50 viewed from the outside in the radial direction C of the cover member 7. The shape of the deformable unit portion 50 when viewed from the front is the same as when the annular cover member 7 is unfolded in a sheet shape and the deformable unit portion 50 in this unfolded body is viewed along the sheet thickness direction. Hereinafter, the "front view of the deformation unit portion 50" may be simply referred to as "front view".

図５に示すように、２つの第１尾根部５１ａは、正面視において、中心軸線方向Ｂに対して０°より大きく９０°以下の角度θ１を成している。また、図５に示すように、２つの第１尾根部５１ａは、間隔を隔てて配置されている。図５に示すように、本実施形態の２つの第１尾根部５１ａは、正面視において、中心軸線方向Ｂに対して略直交して延在しているが、中心軸線方向Ｂに対して０°より大きく９０°未満の角度θ１で傾斜していてもよい。 As shown in FIG. 5, the two first ridge portions 51a form an angle θ1 larger than 0 ° and 90 ° or less with respect to the central axis direction B in the front view. Further, as shown in FIG. 5, the two first ridge portions 51a are arranged at intervals. As shown in FIG. 5, the two first ridge portions 51a of the present embodiment extend substantially orthogonally to the central axis direction B in the front view, but are 0 with respect to the central axis direction B. It may be tilted at an angle θ1 greater than ° and less than 90 °.

また、本実施形態の２つの第１尾根部５１ａは、正面視において略平行に延在しているが、異なる角度で延在していてもよい。 Further, although the two first ridge portions 51a of the present embodiment extend substantially in parallel in the front view, they may extend at different angles.

図５に示すように、２つの第２尾根部５１ｂは、正面視において、中心軸線方向Ｂに対して０°より大きく、第１尾根部５１ａよりも小さい角度θ２を成している。また、図５に示すように、２つの第２尾根部５１ｂは、正面視において、２つの第１尾根部５１ａに跨って延在している。 As shown in FIG. 5, the two second ridge portions 51b form an angle θ2 that is larger than 0 ° with respect to the central axis direction B and smaller than the first ridge portion 51a in the front view. Further, as shown in FIG. 5, the two second ridge portions 51b extend over the two first ridge portions 51a in the front view.

本実施形態の２つの第２尾根部５１ｂは、正面視において略平行に延在しているが、異なる角度で延在していてもよい。 The two second ridge portions 51b of the present embodiment extend substantially in parallel in the front view, but may extend at different angles.

変形凹部５２は、２つの第１尾根部５１ａ及び２つの第２尾根部５１ｂにより囲まれ、中心軸線方向Ｂに変形する。 The deformable recess 52 is surrounded by two first ridge portions 51a and two second ridge portions 51b, and is deformed in the central axis direction B.

上述したような、２つの第１尾根部５１ａ、２つの第２尾根部５１ｂ、及び、変形凹部５２で構成される変形ユニット部５０を用いることで、例えば特許文献１に記載されているような既存の蛇腹形状のカバー部材と比較して、中心軸線方向Ｂでの変形性能（弾性変形可能長さ及びばね係数）を同等に維持した状態であっても、変形ユニット部５０を多数配置することで、各変形ユニット部５０が負担する中心軸線方向Ｂでの変形量を小さくすることができる。そのため、各変形ユニット部５０の変形凹部５２の径方向Ｃの窪み量を小さくすることができる。その結果、カバー部材７の外表面の径方向Ｃでの凹凸の変化量を小さくでき、薬液等が付着しても拭き取り易くなる。このように、上述の変形ユニット部５０を用いることで、中心軸線方向Ｂでの変形性能を保持しつつ、清掃し易い外表面の形状を有するカバー部材７を実現することができる。 By using the deformation unit portion 50 composed of the two first ridge portions 51a, the two second ridge portions 51b, and the deformation recess 52 as described above, for example, as described in Patent Document 1. A large number of deformation unit portions 50 should be arranged even when the deformation performance (elastic deformable length and spring coefficient) in the central axis direction B is maintained at the same level as that of the existing bellows-shaped cover member. Therefore, the amount of deformation in the central axis direction B borne by each deformation unit portion 50 can be reduced. Therefore, the amount of depression in the radial direction C of the deformation recess 52 of each deformation unit portion 50 can be reduced. As a result, the amount of change in the unevenness of the outer surface of the cover member 7 in the radial direction C can be reduced, and even if a chemical solution or the like adheres, it can be easily wiped off. As described above, by using the above-mentioned deformation unit portion 50, it is possible to realize the cover member 7 having an outer surface shape that is easy to clean while maintaining the deformation performance in the central axis direction B.

上述したように、２つの第１尾根部５１ａは、正面視において略平行に延在してもよく、異なる角度で延在していてもよい。但し、２つの第１尾根部５１ａは、正面視において略平行に延在することが好ましい。このようにすることで、中心軸線方向Ｂにおける圧縮変形を、より容易に行うことができる。例えば、カバー部材７を中心軸線方向Ｂに圧縮変形させる際に、カバー部材７が中心軸線方向Ｂ以外の方向に曲げ変形することを抑制できる。 As described above, the two first ridge portions 51a may extend substantially parallel to each other in the front view, or may extend at different angles. However, it is preferable that the two first ridge portions 51a extend substantially in parallel in the front view. By doing so, the compression deformation in the central axis direction B can be performed more easily. For example, when the cover member 7 is compressed and deformed in the central axis direction B, it is possible to prevent the cover member 7 from being bent and deformed in a direction other than the central axis direction B.

更に、上述したように、２つの第１尾根部５１ａは、正面視において、中心軸線方向Ｂに対して略直交して延在していてもよく、中心軸線方向Ｂに対して０°より大きく９０°未満の角度θ１で傾斜していてもよい。但し、本実施形態のように、２つの第１尾根部５１ａは、正面視において中心軸線方向Ｂに対して略直交して延在することが好ましい。このようにすることで、中心軸線方向Ｂにおける圧縮変形を、より容易に行うことができる。例えば、カバー部材７を中心軸線方向Ｂに圧縮変形させる際に、カバー部材７が中心軸線方向Ｂ以外の方向に曲げ変形することを抑制できる。 Further, as described above, the two first ridge portions 51a may extend substantially orthogonally to the central axis direction B in the front view, and are larger than 0 ° with respect to the central axis direction B. It may be tilted at an angle θ1 less than 90 °. However, as in the present embodiment, it is preferable that the two first ridge portions 51a extend substantially orthogonal to the central axis direction B in the front view. By doing so, the compression deformation in the central axis direction B can be performed more easily. For example, when the cover member 7 is compressed and deformed in the central axis direction B, it is possible to prevent the cover member 7 from being bent and deformed in a direction other than the central axis direction B.

また、上述したように、２つの第２尾根部５１ｂは、正面視において略平行に延在してもよく、異なる角度で延在していてもよい。但し、本実施形態のように、２つの第２尾根部５１ｂについても、正面視において略平行に延在することが好ましい。このようにすることで、中心軸線方向Ｂにおける圧縮変形を、より容易に行うことができる。例えば、カバー部材７を中心軸線方向Ｂに圧縮変形させる際に、カバー部材７が中心軸線方向Ｂ以外の方向に曲げ変形することを抑制できる。 Further, as described above, the two second ridge portions 51b may extend substantially parallel to each other in the front view, or may extend at different angles. However, as in the present embodiment, it is preferable that the two second ridge portions 51b also extend substantially in parallel in the front view. By doing so, the compression deformation in the central axis direction B can be performed more easily. For example, when the cover member 7 is compressed and deformed in the central axis direction B, it is possible to prevent the cover member 7 from being bent and deformed in a direction other than the central axis direction B.

ここで、図５に示すように、本実施形態の複数の変形ユニット部５０は、第１尾根部５１ａの延在方向に沿って連接されている。本実施形態の第１尾根部５１ａの延在方向とは、カバー部材７の周方向Ｄである。また、周方向Ｄで連接される２つの変形ユニット部５０は、１つの第２尾根部５１ｂを共有することで周方向Ｄに連接されている。ここで、共有される第２尾根部５１ｂについて、図５に示す周方向Ｄで連接される２つの変形ユニット部５０ａ１、５０ａ２を用いて例示説明する。図５に示すように、一方の変形ユニット部５０ａ１の周方向Ｄの一方側（図５では上側）の第２尾根部５１ｂと、他方の変形ユニット部５０ａ２の周方向Ｄの他方側（図５では下側）の第２尾根部５１ｂと、が共有されている。 Here, as shown in FIG. 5, the plurality of deformation unit portions 50 of the present embodiment are connected along the extending direction of the first ridge portion 51a. The extending direction of the first ridge portion 51a of the present embodiment is the circumferential direction D of the cover member 7. Further, the two deformation unit portions 50 connected in the circumferential direction D are connected in the circumferential direction D by sharing one second ridge portion 51b. Here, the shared second ridge portion 51b will be illustrated by using two deformation unit portions 50a1 and 50a2 connected in the circumferential direction D shown in FIG. As shown in FIG. 5, the second ridge portion 51b on one side (upper side in FIG. 5) of the circumferential direction D of one deformation unit portion 50a1 and the other side of the circumferential direction D of the other deformation unit portion 50a2 (FIG. 5). The lower side) is shared with the second ridge portion 51b.

また、本実施形態のカバー部材７では、複数（本実施形態では６つ）の変形ユニット部５０が周方向Ｄの全域に亘って連接されている。周方向Ｄに隣接する変形ユニット部５０同士は、上述したように、１つの第２尾根部５１ｂを共有することで、周方向Ｄに連接されている。 Further, in the cover member 7 of the present embodiment, a plurality of (six in the present embodiment) deformation unit portions 50 are connected to each other over the entire area in the circumferential direction D. As described above, the deformation unit portions 50 adjacent to the circumferential direction D are connected to each other in the circumferential direction D by sharing one second ridge portion 51b.

また、図５に示すように、本実施形態の複数の変形ユニット部５０は、第２尾根部５１ｂの延在方向に沿って連接されている。本実施形態の第２尾根部５１ｂの延在方向とは、カバー部材７の中心軸線方向Ｂの一方に向かうにつれて周方向Ｄの一方に変位する螺旋方向Ｅである。また、螺旋方向Ｅで連接される２つの変形ユニット部５０は、１つの第１尾根部５１ａを共有することで螺旋方向Ｅに連接されている。ここで、共有される第１尾根部５１ａについて、図５に示す螺旋方向Ｅで連接される２つの変形ユニット部５０ａ１、５０ａ３を用いて例示説明する。図５に示すように、一方の変形ユニット部５０ａ１の螺旋方向Ｅの一方側（図５では右側）の第１尾根部５１ａと、他方の変形ユニット部５０ａ３の螺旋方向Ｅの他方側（図５では左側）の第１尾根部５１ａと、が共有されている。 Further, as shown in FIG. 5, the plurality of deformation unit portions 50 of the present embodiment are connected along the extending direction of the second ridge portion 51b. The extending direction of the second ridge portion 51b of the present embodiment is a spiral direction E that is displaced to one of the circumferential directions D toward one of the central axis directions B of the cover member 7. Further, the two deformation unit portions 50 connected in the spiral direction E are connected in the spiral direction E by sharing one first ridge portion 51a. Here, the shared first ridge portion 51a will be illustrated by using two deformation unit portions 50a1 and 50a3 connected in the spiral direction E shown in FIG. As shown in FIG. 5, the first ridge portion 51a on one side (right side in FIG. 5) of the spiral direction E of one deformation unit portion 50a1 and the other side of the spiral direction E of the other deformation unit portion 50a3 (FIG. 5). The left side) is shared with the first ridge portion 51a.

また、本実施形態のカバー部材７では、複数の変形ユニット部５０が中心軸線方向Ｂの全域に亘って連接されている。螺旋方向Ｅに隣接する変形ユニット部５０同士は、上述したように、１つの第１尾根部５１ａを共有することで、螺旋方向Ｅに連接されている。 Further, in the cover member 7 of the present embodiment, a plurality of deformation unit portions 50 are connected to each other over the entire area in the central axis direction B. As described above, the deformation unit portions 50 adjacent to the spiral direction E are connected to each other in the spiral direction E by sharing one first ridge portion 51a.

本実施形態の変形ユニット部５０における２つの第１尾根部５１ａは、別々の環状凸部により構成されているが、この構成に限られず、連なる１つの螺旋状凸部により構成されてもよい。但し、本実施形態のように、変形ユニット部５０における２つの第１尾根部５１ａは、別々の環状凸部により構成されていることが好ましい。換言すれば、２つの第１尾根部５１ａは連なっていないことが好ましい。このようにすることで、２つの第１尾根部５１ａのうち一方の第１尾根部５１ａを変形させることで発生する復元力が、他方の第１尾根部５１ａに作用し難い。つまり、一方の第１尾根部５１ａの変形と、他方の第１尾根部５１ａの変形と、が互いに作用し難くなる。つまり、カバー部材７の中心軸線方向Ｂでのばね係数を、２つの第１尾根部が螺旋状に連なっている構成と比較して、小さくし易い。そのため、中心軸線方向Ｂに、より圧縮し易いカバー部材７を実現できる。 The two first ridge portions 51a in the deformation unit portion 50 of the present embodiment are composed of separate annular convex portions, but the present invention is not limited to this configuration, and may be composed of one continuous spiral convex portion. However, as in the present embodiment, it is preferable that the two first ridge portions 51a in the deformation unit portion 50 are formed by separate annular convex portions. In other words, it is preferable that the two first ridge portions 51a are not connected to each other. By doing so, the restoring force generated by deforming one of the first ridge portions 51a of the two first ridge portions 51a is unlikely to act on the other first ridge portion 51a. That is, it becomes difficult for the deformation of one first ridge portion 51a and the deformation of the other first ridge portion 51a to interact with each other. That is, the spring coefficient of the cover member 7 in the central axis direction B can be easily reduced as compared with the configuration in which the two first ridges are spirally connected. Therefore, it is possible to realize the cover member 7 which is easier to compress in the central axis direction B.

更に、本実施形態の変形ユニット部５０における２つの第２尾根部５１ｂは、別々の螺旋状凸部により構成されているが、この構成に限られず、連なる１つの螺旋状凸部により構成されてもよい。但し、本実施形態のように、変形ユニット部５０における２つの第２尾根部５１ｂは、別々の螺旋状凸部により構成されていることが好ましい。換言すれば、２つの第２尾根部５１ｂは連なっていないことが好ましい。このようにすることで、２つの第２尾根部５１ｂの一方の第２尾根部５１ｂを変形させることで発生する復元力が、他方の第２尾根部５１ｂに作用し難い。つまり、一方の第２尾根部５１ｂの変形と、他方の第２尾根部５１ｂの変形と、が互いに作用し難くなる。つまり、カバー部材７の中心軸線方向Ｂでのばね係数を、２つの第２尾根部が螺旋状に連なっている構成と比較して、小さくし易い。そのため、中心軸線方向Ｂに、より圧縮し易いカバー部材７を実現できる。 Further, the two second ridge portions 51b in the deformation unit portion 50 of the present embodiment are composed of separate spiral convex portions, but the present invention is not limited to this configuration, and are composed of one continuous spiral convex portion. May be good. However, as in the present embodiment, it is preferable that the two second ridge portions 51b in the deformation unit portion 50 are formed by separate spiral convex portions. In other words, it is preferable that the two second ridge portions 51b are not connected to each other. By doing so, the restoring force generated by deforming one of the second ridges 51b of the two second ridges 51b is unlikely to act on the other second ridge 51b. That is, it becomes difficult for the deformation of one second ridge portion 51b and the deformation of the other second ridge portion 51b to interact with each other. That is, the spring coefficient of the cover member 7 in the central axis direction B can be easily reduced as compared with the configuration in which the two second ridges are spirally connected. Therefore, it is possible to realize the cover member 7 which is easier to compress in the central axis direction B.

また、本実施形態の変形ユニット部５０の変形凹部５２は谷部５２ａを備える。谷部５２ａは、第１尾根部５１ａ及び第２尾根部５１ｂとは径方向Ｃの反対側に向かって突出する稜線により形成されている。本実施形態の第１尾根部５１ａ及び第２尾根部５１ｂは、カバー部材７の径方向Ｃの外側に向かって突出する稜線により形成されている。したがって、本実施形態の谷部５２ａは、カバー部材７の径方向Ｃの内側に向かって突出する稜線により形成されている。 Further, the deformation recess 52 of the deformation unit portion 50 of the present embodiment includes a valley portion 52a. The valley portion 52a is formed by a ridge line protruding toward the opposite side in the radial direction C from the first ridge portion 51a and the second ridge portion 51b. The first ridge portion 51a and the second ridge portion 51b of the present embodiment are formed by ridge lines protruding outward in the radial direction C of the cover member 7. Therefore, the valley portion 52a of the present embodiment is formed by a ridge line protruding inward in the radial direction C of the cover member 7.

図５に示すように、谷部５２ａは、正面視において、変形ユニット部５０の第１尾根部５１ａと第２尾根部５１ｂとの交点同士を結ぶ対角線のうち、中心軸線方向Ｂに対して、第１尾根部５１ａよりも小さく、かつ、第２尾根部５１ｂよりも大きい角度θ３を成す対角線により構成されている。つまり、本実施形態の変形ユニット部５０では、中心軸線方向Ｂに対する角度として、「９０°≧θ１＞θ３＞θ２」が成立している。 As shown in FIG. 5, in the front view, the valley portion 52a is a diagonal line connecting the intersections of the first ridge portion 51a and the second ridge portion 51b of the deformation unit portion 50 with respect to the central axis direction B. It is composed of diagonal lines forming an angle θ3 that is smaller than the first ridge portion 51a and larger than the second ridge portion 51b. That is, in the deformation unit portion 50 of the present embodiment, “90 ° ≧ θ1> θ3> θ2” is established as the angle with respect to the central axis direction B.

変形ユニット部５０の変形凹部５２において上述の谷部５２ａを設けることで、カバー部材７が中心軸線方向Ｂに圧縮変形する際に、変形凹部５２が谷部５２ａを折り目として変形し易くなる。そのため、カバー部材７が中心軸線方向Ｂに圧縮変形する際に、変形凹部５２が谷部５２ａ以外の位置で折れ曲がることで、中心軸線方向Ｂ以外の方向に向けた大きな復元力が発生することを抑制できる。そのため、中心軸線方向Ｂに、より圧縮変形し易いカバー部材７を実現できる。 By providing the above-mentioned valley portion 52a in the deformation recess 52 of the deformation unit portion 50, when the cover member 7 is compressed and deformed in the central axis direction B, the deformation recess 52 is easily deformed with the valley portion 52a as a crease. Therefore, when the cover member 7 is compressed and deformed in the central axis direction B, the deformation recess 52 is bent at a position other than the valley portion 52a, so that a large restoring force is generated in a direction other than the central axis direction B. Can be suppressed. Therefore, it is possible to realize the cover member 7 which is more easily compressed and deformed in the central axis direction B.

更に、図５に示すように、本実施形態のカバー部材７は、２種類の変形ユニット部５０を備える。以下、説明の便宜上、上述した変形ユニット部５０を「第１変形ユニット部５０ａ」と記載する。また、中心軸線方向Ｂと直交する平面に対して第１変形ユニット部５０ａと面対称となる変形ユニット部を「第２変形ユニット部５０ｂ」と記載する。換言すれば、図５に示すように、第１変形ユニット部５０ａは、中心軸線方向Ｂを基準として反時計回りに見て、上述の「９０°≧θ１＞θ３＞θ２」が成立するのに対して、第２変形ユニット部５０ｂは、中心軸線方向Ｂを基準として時計回りに見て、上述の「９０°≧θ１＞θ３＞θ２」が成立する。このように、本実施形態のカバー部材７は、第１変形ユニット部５０ａ及び第２変形ユニット部５０ｂの両方を備える。 Further, as shown in FIG. 5, the cover member 7 of the present embodiment includes two types of deformation unit portions 50. Hereinafter, for convenience of explanation, the above-mentioned deformation unit portion 50 will be referred to as a “first deformation unit portion 50a”. Further, the deformation unit portion that is plane-symmetric with the first deformation unit portion 50a with respect to the plane orthogonal to the central axis direction B is referred to as "second deformation unit portion 50b". In other words, as shown in FIG. 5, when the first deformation unit portion 50a is viewed counterclockwise with reference to the central axis direction B, the above-mentioned "90 ° ≥ θ1> θ3> θ2" is established. On the other hand, when the second deformation unit portion 50b is viewed clockwise with reference to the central axis direction B, the above-mentioned "90 ° ≧ θ1> θ3> θ2" is established. As described above, the cover member 7 of the present embodiment includes both the first deformation unit portion 50a and the second deformation unit portion 50b.

カバー部材７が上述の第１変形ユニット部５０ａ及び第２変形ユニット部５０ｂを備えることにより、いずれか一方の変形ユニット部のみを備える構成と比較して、カバー部材７を中心軸線方向Ｂにおいて圧縮変形する際の捩れ変形を軽減できる。 By providing the cover member 7 with the first deformation unit portion 50a and the second deformation unit portion 50b described above, the cover member 7 is compressed in the central axis direction B as compared with the configuration in which only one of the deformation unit portions is provided. Twisting deformation at the time of deformation can be reduced.

更に、本実施形態のカバー部材７は、中心軸線方向Ｂにおいて、第１変形ユニット部５０ａのみから構成される第１領域Ｚ１と、第２変形ユニット部５０ｂのみから構成される第２領域Ｚ２と、を含む。本実施形態の第１領域Ｚ１とは、複数の第１変形ユニット部５０ａが周方向Ｄ全域に亘って連接されて形成されている、中心軸線方向Ｂにおける領域である。また、本実施形態の第２領域Ｚ２とは、複数の第２変形ユニット部５０ｂが周方向Ｄ全域に亘って連接されて形成されている、中心軸線方向Ｂにおける領域である。より具体的に、本実施形態のカバー部材７は、中心軸線方向Ｂの中央位置を境界として一方側（図５では右側）が第１領域Ｚ１であり、他方側（図５では左側）が第２領域Ｚ２である。 Further, the cover member 7 of the present embodiment includes a first region Z1 composed of only the first deformation unit portion 50a and a second region Z2 composed of only the second deformation unit portion 50b in the central axis direction B. ,including. The first region Z1 of the present embodiment is a region in the central axis direction B formed by connecting a plurality of first deformation unit portions 50a over the entire circumferential direction D. Further, the second region Z2 of the present embodiment is a region in the central axis direction B formed by connecting a plurality of second deformation unit portions 50b over the entire circumferential direction D. More specifically, in the cover member 7 of the present embodiment, one side (right side in FIG. 5) is the first region Z1 and the other side (left side in FIG. 5) is the first region with the central position in the central axis direction B as a boundary. Two regions Z2.

カバー部材７が第１領域Ｚ１及び第２領域Ｚ２の両方を備えることで、いずれか一方の領域のみを備える構成と比較して、カバー部材７を中心軸線方向Ｂにおいて圧縮変形する際の捩れ変形を軽減できる。上述の第１領域Ｚ１及び第２領域Ｚ２のいずれか一方の領域のみで構成されるカバー部材の場合、カバー部材を中心軸線方向Ｂにおいて圧縮変形する際の捩れ変形が大きくなる。本実施形態のように、所謂「筒状ねじり折り」構造を有するカバー部材７は、中心軸線方向Ｂにおいて圧縮変形する際に回動を伴う。そのため、本実施形態のように、カバー部材７が第１領域Ｚ１及び第２領域Ｚ２の両方を備えることで、カバー部材７における捩れ変形を抑制することができる。 By providing both the first region Z1 and the second region Z2, the cover member 7 is twisted and deformed when the cover member 7 is compressively deformed in the central axis direction B as compared with a configuration in which only one of the regions is provided. Can be reduced. In the case of a cover member composed of only one of the above-mentioned first region Z1 and second region Z2, the torsional deformation when the cover member is compressively deformed in the central axis direction B becomes large. As in the present embodiment, the cover member 7 having a so-called "cylindrical torsional folding" structure is rotated when it is compressed and deformed in the central axis direction B. Therefore, as in the present embodiment, when the cover member 7 includes both the first region Z1 and the second region Z2, it is possible to suppress the torsional deformation of the cover member 7.

本実施形態のカバー部材７は、第１領域Ｚ１及び第２領域Ｚ２のみを備えるが、別の領域を備えていてもよい。更に、本実施形態のカバー部材７では、第１領域Ｚ１及び第２領域Ｚ２それぞれの中心軸線方向Ｂにおける範囲（中心軸線方向Ｂでの長さ）は等しい。第１領域Ｚ１及び第２領域Ｚ２それぞれの中心軸線方向Ｂにおける範囲を異ならせてもよいが、本実施形態のように等しいことが好ましい。このようにすることで、カバー部材７における捩れ変形を、より抑制することができる。 The cover member 7 of the present embodiment includes only the first region Z1 and the second region Z2, but may include another region. Further, in the cover member 7 of the present embodiment, the ranges (lengths in the central axis direction B) of the first region Z1 and the second region Z2 in the central axis direction B are the same. The ranges in the central axis direction B of each of the first region Z1 and the second region Z2 may be different, but they are preferably equal as in the present embodiment. By doing so, the torsional deformation of the cover member 7 can be further suppressed.

図６は、本実施形態のカバー部材７の変形例としてのカバー部材２０７の側面図である。図６に示すカバー部材２０７は、図５に示すカバー部材７と同様、第１領域Ｚ１及び第２領域Ｚ２のみを備える。また、図６に示すカバー部材２０７では、第１領域Ｚ１及び第２領域Ｚ２それぞれの中心軸線方向Ｂにおける範囲は等しい。しかしながら、図６に示すカバー部材２０７では、第１領域Ｚ１及び第２領域Ｚ２を中心軸線方向Ｂにおいて交互に配置している。このようにすることで、カバー部材２０７の中心軸線方向Ｂ全体での捩れ変形の抑制に加えて、中心軸線方向Ｂの位置に応じた捩れ変形のばらつきを抑制できる。 FIG. 6 is a side view of the cover member 207 as a modification of the cover member 7 of the present embodiment. Like the cover member 7 shown in FIG. 5, the cover member 207 shown in FIG. 6 includes only the first region Z1 and the second region Z2. Further, in the cover member 207 shown in FIG. 6, the ranges in the central axis direction B of each of the first region Z1 and the second region Z2 are the same. However, in the cover member 207 shown in FIG. 6, the first region Z1 and the second region Z2 are alternately arranged in the central axis direction B. By doing so, in addition to suppressing the torsional deformation of the cover member 207 in the entire central axis direction B, it is possible to suppress the variation in the torsional deformation depending on the position of the central axis direction B.

本実施形態のカバー部材７は、上述したように、変形ユニット部５０の集合として捉えることができるが、この観点とは異なる観点で捉えることも可能である。以下、この異なる観点について説明する。 As described above, the cover member 7 of the present embodiment can be grasped as a set of deformation unit portions 50, but it can also be grasped from a viewpoint different from this viewpoint. Hereinafter, this different viewpoint will be described.

本実施形態のカバー部材７は、径方向Ｃの外側に向かって突出し、周方向Ｄに延在する稜線により形成されている環状凸部６０を備える。環状凸部６０は、中心軸線方向Ｂにおいて所定間隔を隔てて複数配置されている。また、複数の環状凸部６０は、中心軸線方向Ｂの全域に亘って配置されている。カバー部材７の環状凸部６０の位置での中心軸線方向Ｂに直交する断面視において、環状凸部６０は略六角形状の外形を有する。環状凸部６０の外形は、上述した六角形状に限られず、他の多角形状であってもよく、円形状であってもよい。また、環状凸部６０を形成する稜線は、周方向Ｄ全域に亘って無端状に延在していればよく、周方向Ｄに対して傾斜して延在していてもよい。 The cover member 7 of the present embodiment includes an annular convex portion 60 formed by a ridge line extending outward in the radial direction C and extending in the circumferential direction D. A plurality of annular convex portions 60 are arranged at predetermined intervals in the central axis direction B. Further, the plurality of annular convex portions 60 are arranged over the entire area in the central axis direction B. In a cross-sectional view orthogonal to the central axis direction B at the position of the annular convex portion 60 of the cover member 7, the annular convex portion 60 has a substantially hexagonal outer shape. The outer shape of the annular convex portion 60 is not limited to the hexagonal shape described above, and may be another polygonal shape or a circular shape. Further, the ridge line forming the annular convex portion 60 may extend endlessly over the entire circumferential direction D, and may extend at an angle with respect to the circumferential direction D.

本実施形態のカバー部材７において、上述した複数の環状凸部６０のうち中心軸線方向Ｂに隣接する２つの環状凸部６０は、径方向Ｃの外側に向かって突出し、中心軸線方向Ｂに対して傾斜して延在する稜線により形成されている傾斜凸部６１と交差する。より具体的に、複数の環状凸部６０のうち中心軸線方向Ｂに隣接する２つの環状凸部６０は、複数の傾斜凸部６１のうち少なくとも２つの傾斜凸部６１と交差している。本実施形態において、中心軸線方向Ｂに隣接する２つの環状凸部６０と交差する傾斜凸部６１は、周方向Ｄの異なる位置に６つ配置されている。 In the cover member 7 of the present embodiment, of the plurality of annular convex portions 60 described above, the two annular convex portions 60 adjacent to the central axis direction B project outward in the radial direction C and with respect to the central axis direction B. It intersects with an inclined convex portion 61 formed by an inclined and extending ridge line. More specifically, the two annular convex portions 60 adjacent to the central axis direction B among the plurality of annular convex portions 60 intersect with at least two inclined convex portions 61 among the plurality of inclined convex portions 61. In the present embodiment, six inclined convex portions 61 intersecting with two annular convex portions 60 adjacent to the central axis direction B are arranged at different positions in the circumferential direction D.

より具体的に、本実施形態のカバー部材７は、上述の環状凸部６０に加えて、径方向Ｃの外側に向かって突出し、螺旋状に延在する稜線により形成されている、上述の傾斜凸部６１としての螺旋状凸部６２を備える。換言すれば、本実施形態の上述の傾斜凸部６１は、螺旋状に延在する稜線により形成されている螺旋状凸部６２により構成されている。ここで「螺旋状」とは、中心軸線方向Ｂの一方側に向かうにつれて周方向Ｄの一方側に変位するように延在する状態を意味している。螺旋状凸部６２は、周方向Ｄにおいて所定間隔を隔てて複数配置されている。また、複数の螺旋状凸部６２は、周方向Ｄの全域に亘って配置されている。 More specifically, the cover member 7 of the present embodiment is formed by a ridge line that protrudes outward in the radial direction C and extends spirally in addition to the annular convex portion 60 described above. A spiral convex portion 62 is provided as the convex portion 61. In other words, the above-mentioned inclined convex portion 61 of the present embodiment is composed of a spiral convex portion 62 formed by a spirally extending ridge line. Here, the "spiral shape" means a state in which the spiral direction extends so as to be displaced to one side in the circumferential direction D toward one side in the central axis direction B. A plurality of spiral convex portions 62 are arranged at predetermined intervals in the circumferential direction D. Further, the plurality of spiral convex portions 62 are arranged over the entire area in the circumferential direction D.

また、本実施形態のカバー部材７では、２種類の螺旋状凸部６２を備える。図５に示すように、本実施形態のカバー部材７は、中心軸線方向Ｂの一方側（図５では右側）に向かうにつれて周方向Ｄの一方側（図５では上側）に変位するように延在する第１螺旋状凸部６２ａを備える。更に、本実施形態のカバー部材７は、中心軸線方向Ｂの他方側（図５では左側）に向かうにつれて周方向Ｄの一方側（図５では上側）に変位するように延在する第２螺旋状凸部６２ｂを備える。第１螺旋状凸部６２ａは、カバー部材７の中心軸線方向Ｂの中央よりも右側のみに配置されている。また、第２螺旋状凸部６２ｂは、カバー部材７の中心軸線方向Ｂの中央よりも左側のみに配置されている。このような中心軸線方向Ｂに直交する平面に対して面対称な形状を有する第１螺旋状凸部６２ａ及び第２螺旋状凸部６２ｂを設けることで、上述したように、カバー部材７における捩れ変形を抑制することができる。 Further, the cover member 7 of the present embodiment includes two types of spiral convex portions 62. As shown in FIG. 5, the cover member 7 of the present embodiment extends so as to be displaced toward one side of the circumferential direction D (upper side in FIG. 5) toward one side of the central axis direction B (right side in FIG. 5). The existing first spiral convex portion 62a is provided. Further, the cover member 7 of the present embodiment extends so as to be displaced toward one side (upper side in FIG. 5) of the circumferential direction D toward the other side (left side in FIG. 5) of the central axis direction B. A convex portion 62b is provided. The first spiral convex portion 62a is arranged only on the right side of the center of the cover member 7 in the central axis direction B. Further, the second spiral convex portion 62b is arranged only on the left side of the center of the cover member 7 in the central axis direction B. By providing the first spiral convex portion 62a and the second spiral convex portion 62b having a shape symmetrical with respect to the plane orthogonal to the central axis direction B, as described above, the cover member 7 is twisted. Deformation can be suppressed.

カバー部材７には、上述した複数の環状凸部６０と複数の傾斜凸部６１（本実施形態では螺旋状凸部６２としての第１螺旋状凸部６２ａ及び第２螺旋状凸部６２ｂ）とが互いに交差することにより、平行四辺形状の複数の変形ユニット部５０が形成されている。複数の環状凸部６０と複数の第１螺旋状凸部６２ａとが互いに交差することにより形成される第１変形ユニット部５０ａの形状、及び、複数の環状凸部６０と複数の第２螺旋状凸部６２ｂとが互いに交差することにより形成される第２変形ユニット部５０ｂの形状、についても中心軸線方向Ｂに直交する平面に対して面対称である。 The cover member 7 includes the plurality of annular convex portions 60 and the plurality of inclined convex portions 61 (in the present embodiment, the first spiral convex portion 62a and the second spiral convex portion 62b as the spiral convex portion 62). By intersecting each other, a plurality of deformation unit portions 50 having a parallel quadrilateral shape are formed. The shape of the first deformation unit portion 50a formed by intersecting the plurality of annular convex portions 60 and the plurality of first spiral convex portions 62a, and the plurality of annular convex portions 60 and the plurality of second spiral shapes. The shape of the second deformation unit portion 50b formed by intersecting the convex portions 62b with each other is also plane symmetric with respect to the plane orthogonal to the central axis direction B.

最後に、本実施形態のカバー部材７を中心軸線方向Ｂに圧縮変形した場合の変形動作について説明する。図７は、図５と同様、自然状態のカバー部材７の側面図である。図７では、カバー部材７が中心軸線方向Ｂに圧縮変形する場合（図７の中心軸線方向Ｂの両側に位置する白抜き矢印参照）の、各部位の動作を各種矢印にて示している。具体的に、図７では、カバー部材７が中心軸線方向Ｂに圧縮変形する場合の、第１尾根部５１ａの回動方向を破線矢印にて示している。また、図７では、第１尾根部５１ａと第２尾根部５１ｂとの各交点が、カバー部材７が中心軸線方向Ｂに圧縮変形する場合に、近づいていく別の交点を太線矢印にて示している。 Finally, the deformation operation when the cover member 7 of the present embodiment is compressed and deformed in the central axis direction B will be described. FIG. 7 is a side view of the cover member 7 in a natural state, as in FIG. In FIG. 7, when the cover member 7 is compressed and deformed in the central axis direction B (see the white arrows located on both sides of the central axis direction B in FIG. 7), the operation of each part is shown by various arrows. Specifically, in FIG. 7, the rotation direction of the first ridge portion 51a when the cover member 7 is compressed and deformed in the central axis direction B is indicated by a broken line arrow. Further, in FIG. 7, another intersection where each intersection of the first ridge portion 51a and the second ridge portion 51b approaches when the cover member 7 is compressed and deformed in the central axis direction B is indicated by a thick arrow. ing.

図７に示すように、カバー部材７を中心軸線方向Ｂの両側から圧縮変形していくと、第１領域Ｚ１に位置する第１尾根部５１ａは、周方向Ｄの一方側（図７では上側）に回動しながら（図７の破線矢印参照）、中心軸線方向Ｂの中央側に向かって近づいていく。換言すれば、カバー部材７を中心軸線方向Ｂの両側から圧縮変形していくと、第１領域Ｚ１の環状凸部６０は、周方向Ｄの一方側（図７では上側）に回動しながら（図７の破線矢印参照）、中心軸線方向Ｂの中央側に向かって近づいていく。また、図７に示すように、カバー部材７を中心軸線方向Ｂの両側から圧縮変形していくと、第２領域Ｚ２に位置する第１尾根部５１ａは、周方向Ｄの一方側（図７では上側）に回動しながら（図７の破線矢印参照）、中心軸線方向Ｂの中央側に向かって近づいていく。換言すれば、カバー部材７を中心軸線方向Ｂの両側から圧縮変形していくと、第２領域Ｚ２の環状凸部６０は、周方向Ｄの一方側（図７では上側）に回動しながら（図７の破線矢印参照）、中心軸線方向Ｂの中央側に向かって近づいていく。この際に、第１領域Ｚ１と第２領域Ｚ２との境界を構成する環状凸部６０については、中心軸線方向Ｂの位置は変化せず、周方向Ｄの一方側（図７では上側）に回動する。このように、第１領域Ｚ１の第１尾根部５１ａを構成する環状凸部６０と、第２領域Ｚ２の第１尾根部５１ａを構成する環状凸部６０とが、共に周方向Ｄの同一方向に回動することで、カバー部材７での捩れ変形が抑制される。 As shown in FIG. 7, when the cover member 7 is compressed and deformed from both sides in the central axis direction B, the first ridge portion 51a located in the first region Z1 is located on one side of the circumferential direction D (upper side in FIG. 7). ) (See the broken line arrow in FIG. 7), approaching toward the center side in the central axis direction B. In other words, when the cover member 7 is compressed and deformed from both sides in the central axis direction B, the annular convex portion 60 of the first region Z1 rotates to one side (upper side in FIG. 7) of the circumferential direction D. (See the broken line arrow in FIG. 7), approaching toward the center side in the central axis direction B. Further, as shown in FIG. 7, when the cover member 7 is compression-deformed from both sides in the central axis direction B, the first ridge portion 51a located in the second region Z2 is on one side of the circumferential direction D (FIG. 7). Then, while rotating (upper side) (see the broken line arrow in FIG. 7), it approaches toward the center side in the central axis direction B. In other words, when the cover member 7 is compressed and deformed from both sides in the central axis direction B, the annular convex portion 60 of the second region Z2 rotates to one side (upper side in FIG. 7) of the circumferential direction D. (See the broken line arrow in FIG. 7), approaching toward the center side in the central axis direction B. At this time, with respect to the annular convex portion 60 forming the boundary between the first region Z1 and the second region Z2, the position in the central axis direction B does not change, and the position is on one side of the circumferential direction D (upper side in FIG. 7). Rotate. As described above, the annular convex portion 60 forming the first ridge portion 51a of the first region Z1 and the annular convex portion 60 forming the first ridge portion 51a of the second region Z2 are both in the same direction in the circumferential direction D. By rotating to, the twisting deformation of the cover member 7 is suppressed.

また、第１尾根部５１ａは、変形凹部５２の谷部５２ａが折り曲がるように変形することで、中心軸線方向Ｂの中央側に向かって近づいていく。この谷部５２ａが折り曲がることで、第１尾根部５１ａ及び第２尾根部５１ｂの各交点は、第１尾根部５１ａ及び第２尾根部５１ｂの別の交点に向かって近づく。より具体的に、本実施形態のカバー部材７は、第１尾根部５１ａ及び第２尾根部５１ｂの各交点が、谷部５２ａを挟んで反対側に位置する別の交点に向かって近づくように（図７の太線矢印参照）、中心軸線方向Ｂに圧縮変形する。 Further, the first ridge portion 51a is deformed so that the valley portion 52a of the deformation recess 52 is bent, so that the first ridge portion 51a approaches toward the center side in the central axis direction B. By bending the valley portion 52a, each intersection of the first ridge portion 51a and the second ridge portion 51b approaches another intersection of the first ridge portion 51a and the second ridge portion 51b. More specifically, in the cover member 7 of the present embodiment, the intersections of the first ridge portion 51a and the second ridge portion 51b approach each other toward another intersection located on the opposite side of the valley portion 52a. (Refer to the thick arrow in FIG. 7), compression and deformation are performed in the central axis direction B.

本開示に係るシリンジポンプは、上述した実施形態に示す具体的な構成に限られず、特許請求の範囲を逸脱しない限り、種々の変形・変更が可能である。 The syringe pump according to the present disclosure is not limited to the specific configuration shown in the above-described embodiment, and can be variously modified or modified as long as it does not deviate from the scope of claims.

１：シリンジポンプ
２：押子駆動部
３：ハウジング
３ａ：受け部
４：クランプ
５：押子係合部材
６：移動部材
７、２０７：カバー部材
８：駆動源
９：送りねじ
９ａ：雄ねじ部
１０：フレーム本体
１０ａ：挿通孔
１０ｂ：対向壁部
１１：案内部材
１１ａ：案内軸部
１１ｂ：回動規制部
１２：軸部材
１３：動力伝達部材
１４：伝達機構
２０ａ：タッチパネル
２０ｂ：各種ボタン
５０、５０ａ１、５０ａ２、５０ａ３：変形ユニット部
５０ａ：第１変形ユニット部
５０ｂ：第２変形ユニット部
５１：尾根部
５１ａ：第１尾根部
５１ｂ：第２尾根部
５２：変形凹部
５２ａ：谷部
６０：環状凸部
６１：傾斜凸部
６２：螺旋状凸部
６２ａ：第１螺旋状凸部
６２ｂ：第２螺旋状凸部
１００：シリンジ
１０１：シリンジ本体
１０２：押子
１０３：収容空間
１０４：排出口
１０５：医療用チューブ
Ａ：長手方向
Ｂ：カバー部材の中心軸線方向
Ｃ：カバー部材の径方向
Ｄ：カバー部材の周方向
Ｅ：螺旋方向
Ｏ：カバー部材の中心軸線
Ｚ１：第１領域
Ｚ２：第２領域
θ１：変形ユニット部の正面視における第１尾根部の中心軸線方向に対する角度
θ２：変形ユニット部の正面視における第２尾根部の中心軸線方向に対する角度
θ３：変形ユニット部の正面視における谷部の中心軸線方向に対する角度

1: Helix pump 2: Pusher drive part 3: Housing 3a: Receiving part 4: Clamp 5: Pusher engaging member 6: Moving member 7, 207: Cover member 8: Drive source 9: Feed screw 9a: Male screw part 10 : Frame body 10a: Insertion hole 10b: Facing wall portion 11: Guide member 11a: Guide shaft portion 11b: Rotation restricting portion 12: Shaft member 13: Power transmission member 14: Transmission mechanism 20a: Touch panel 20b: Various buttons 50, 50a1 , 50a2, 50a3: Deformation unit part 50a: First deformation unit part 50b: Second deformation unit part 51: Ridge part 51a: First ridge part 51b: Second ridge part 52: Deformation recess 52a: Valley part 60: Circular convex Part 61: Inclined convex portion 62: Spiral convex portion 62a: First spiral convex portion 62b: Second spiral convex portion 100: Syringe 101: Syringe body 102: Pusher 103: Containment space 104: Discharge port 105: Medical Tube A: Longitudinal direction B: Central axis direction of the cover member C: Radial direction D of the cover member: Circumferential direction E of the cover member: Spiral direction O: Central axis Z1: First region Z2: Second region θ1 : Angle with respect to the central axis direction of the first ridge in the front view of the deformation unit portion θ2: Angle with respect to the central axis direction of the second ridge in the front view of the deformation unit portion θ3: Center of the valley in the front view of the deformation unit portion Angle with respect to the axial direction

Claims

A syringe pump that can be equipped with a syringe and can send the drug solution filled in the syringe to the patient.
A pusher drive unit for moving the pusher of the syringe with respect to the syringe body of the syringe while the syringe is attached is provided.
The pusher drive unit
A pusher engaging member that engages with the pusher of the syringe,
A moving member that is connected to the pusher engaging member and can move together with the pusher engaging member.
An annular cover member that covers the moving member and is deformable in the central axis direction as the moving member moves.
The cover member includes a plurality of deformable unit portions that are deformable in the central axis direction and are defined with a ridge portion formed by ridges intersecting the surfaces as an outer edge.
The deformation unit portion is viewed from the front.
Two first ridges that form an angle of 90 ° or less greater than 0 ° with respect to the central axis direction and are arranged at intervals.
Two second ridges that are larger than 0 ° with respect to the central axis direction, form an angle smaller than the first ridge, and extend across the two first ridges.
A syringe pump comprising a deformed recess surrounded by the two first ridges and the two second ridges and deformed in the direction of the central axis.

The syringe pump according to claim 1, wherein the two first ridge portions extend substantially in parallel in a front view of the deformation unit portion.

The syringe pump according to claim 2, wherein the two first ridge portions extend substantially orthogonal to the central axis direction in a front view of the deformation unit portion.

The syringe pump according to claim 2 or 3, wherein the two second ridge portions extend substantially in parallel in a front view of the deformation unit portion.

The plurality of deformation unit portions are connected along the extending direction of the first ridge portion.
4. The two deformation unit portions connected in the extending direction of the first ridge portion are connected in the extending direction of the first ridge portion by sharing one second ridge portion. The syringe pump described in.

The plurality of deformation unit portions are connected along the extending direction of the second ridge portion.
4. The two deformation unit portions connected in the extending direction of the second ridge portion are connected in the extending direction of the second ridge portion by sharing one first ridge portion. Or the syringe pump according to 5.

The syringe pump according to any one of claims 1 to 6, wherein the two first ridge portions are composed of separate annular convex portions.

The deformed recess comprises a valley formed by a ridge that projects radially opposite to the first ridge and the second ridge.
In the front view of the deformation unit portion, the valley portion is the first diagonal line connecting the intersections of the first ridge portion and the second ridge portion of the deformation unit portion with respect to the central axis direction. The syringe pump according to any one of claims 1 to 7, which is composed of diagonal lines that are smaller than one ridge and have an angle larger than that of the second ridge.

When the deformation unit portion is used as the first deformation unit portion, the cover member includes a plurality of second deformation unit portions that are plane-symmetric with the first deformation unit portion with respect to a plane orthogonal to the central axis direction. ,
The cover member is in the direction of the central axis.
A first region composed of only the first deformation unit portion and
The syringe pump according to any one of claims 1 to 8, further comprising a second region composed of only the second deformation unit portion.

A syringe pump that can be equipped with a syringe and can send the drug solution filled in the syringe to the patient.
A pusher drive unit for moving the pusher of the syringe with respect to the syringe body of the syringe while the syringe is attached is provided.
The pusher drive unit
A pusher engaging member that engages with the pusher of the syringe,
A moving member that is connected to the pusher engaging member and can move together with the pusher engaging member.
An annular cover member that covers the moving member and is deformable in the central axis direction as the moving member moves.
The cover member is
A plurality of annular protrusions formed by ridges protruding outward in the radial direction and extending endlessly over the entire circumferential direction.
A plurality of inclined convex portions formed by ridges extending outward in the radial direction and inclined with respect to the central axis direction are provided.
A syringe pump in which two annular convex portions adjacent to the central axis direction of the plurality of annular convex portions intersect with at least two inclined convex portions of the plurality of inclined convex portions.