JP2010259674A - Disposable syringe equipped with built-in carpule - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable syringe with a built-in carpule which ensures firm retention of a pre-filled and sealed carpule in a barrel before use, and which can be operated more stably and smoothly. <P>SOLUTION: A retaining mechanism 13 is disposed to guard the carrier unit 34 against movement away from a locked position. A needle assembly 33, 51, 37 is connected to the carpule 3. A plunger 4 is engaged with a seal member 32 of the carpule to cooperate with a tubular wall 31 to define a sealed chamber 31a that is communicated with the needle assembly. After the plunger 4 is turned relative to the barrel 1 to move the carrier unit 34 to the unlocked position, the carpule can be pressed forwardly to force the carrier unit to release the ring grip 21 from the lunge member 22 such that the needle assembly and the carpule are biased by a biasing member 23 rearwardly to retract the needle cannula 33 into the barrel. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disposable syringe, and more particularly to a disposable syringe with a carpule.

  U.S. Pat. No. 6,221,055 B1 relating to retractable dental injection discloses a prefilled syringe, which is filled with a barrel and filled with medicine and from the rear open end of the barrel into the barrel. And a pusher ring for holding the needle in the barrel, and a carpule and plunger assembly that is in communication with the needle by a carple that is inserted into the needle and pierced by the rear tip of the needle. At the end of the injection, the plunger is further pushed to move the carpule so that the push ring is removed to allow needle retraction. However, the carple cannot be pre-contained in the barrel, and the carple and barrel must be packed separately for subsequent assembly during use, thereby increasing operating time. In addition, such a syringe structure complicates the manufacture of the syringe.

  Accordingly, in US patent application Ser. No. 11 / 601,526, Applicants disclosed a disposable syringe with visceral carpule. The disposable syringe includes a carple that can be preassembled in a barrel so that clinical injection work by a medical worker is simplified and convenient. Moreover, the syringe can be conveniently made non-reusable after injection, and needle retraction is facilitated in a single operation after injection.

  It is desirable to improve the aforementioned syringes to ensure firm retention and more stable and smooth operation of the pre-filled and sealed capule that is inserted into the barrel prior to use.

  It is an object of the present invention to provide a disposable syringe with a built-in couple that ensures a firm retention of the couple that is pre-filled and sealed in the barrel before use and can be operated more stably and smoothly. is there.

  In accordance with this invention, a disposable syringe with a built-in carple has a peripheral barrel wall defining an anterior and posterior compartment and an insertion opening in communication with the anterior compartment. A retaining member is disposed within the insertion opening and extends rearwardly to terminate at the limit end and is spaced from the front wall portion of the barrel wall to define a receiving space therebetween. The projecting member has a front projecting end having a resting surface that abuts against the limit end and faces the receiving space, and an annular gripped surface spaced from the front wall portion to define a peripheral gap therebetween. A ring head. A ring grip is disposed within the peripheral gap and has inner and outer annular gripped surfaces that retainably engage the gripped surface and the front wall portion, respectively. A seat unit is configured to secure the communicating end of the needle cannula therein. The carpule includes a tubular wall and a seal member. The tubular wall is disposed to be rotatable within the rear compartment and extends forward to terminate at a front tubular edge surface that extends radially to be integrally formed with the distal hub section of the seat unit. The seal member is disposed in fluid tight engagement with the tubular wall and is spaced from the front tubular edge surface to cooperate with the tubular wall to define a sealed chamber for holding a liquid medicament. The seal member is movable forward to release liquid medicament from the sealed chamber to the front tubular edge surface, thereby placing the carpule in the depleted position. The carpull unit is rotatable with the carpull between the locked position and the released position by an external torsional force to release the front protruding end from the limit end, thereby placing the protruding member in the released position In order to move the ring grip forward, it includes a push stud that is pushed forward as soon as the carpul is in the release position. The holding mechanism is arranged to prevent the carrier unit from moving in a direction away from the locking position. A key and keyway mechanism is arranged to guide the tubular wall of the carpule so that it moves along the barrel wall as soon as the carrier unit is moved to the release position. The plunger has a push end that moves the seal member forward along the tubular wall of the carpule and an operating end that is operable to rotate the tubular wall with the carrier unit to a release position. The biasing member moves the distal hub section and the carpule to the rear barrel end so that the needle cannula is retracted into the barrel as soon as the protruding member is placed in the release position, thereby placing the needle cannula in the disposal position. The biasing member is disposed in the receiving space so as to abut against the resting surface so as to bias the ring head.

  Other features and advantages of the present invention will become apparent in the following detailed description of preferred embodiments of the invention with reference to the accompanying drawings.

1 is a developed cross-sectional view showing a first preferred embodiment of a disposable syringe according to the present invention. It is sectional drawing which shows the 1st preferable embodiment in an initial assembly state. It is sectional drawing which follows the line III-III of FIG. 2 which shows the support unit in a latching position. It is sectional drawing which shows the 1st preferable embodiment during an injection stroke. It is sectional drawing similar to FIG. 3 which shows the support unit in a cancellation | release state. It is a fragmentary view showing the first preferred embodiment after completion of the injection stroke. It is sectional drawing which shows a 1st preferable embodiment, and has shown the flange member in the released state from a ring grip. FIG. 2 is a cross-sectional view of the first preferred embodiment showing the needle cannula fully retracted into the barrel. FIG. 3 is a cross-sectional view showing a second preferred embodiment of the disposable syringe according to the present invention. It is sectional drawing which shows the 2nd preferred embodiment in the state ready for use. FIG. 4 is a cross-sectional view of a second preferred embodiment showing the needle cannula fully retracted into the barrel. FIG. 6 is a cross-sectional view showing a third preferred embodiment of a disposable syringe according to the present invention. FIG. 7 is a cross-sectional view showing a third preferred embodiment after completion of an injection stroke. FIG. 7 is a cross-sectional view showing a fourth preferred embodiment of a disposable syringe according to the present invention in an initial assembled state. FIG. 15 is a cross-sectional view taken along line (I)-(I) in FIG. 14. It is sectional drawing which shows the 4th preferred embodiment in use condition. FIG. 7 is a cross-sectional view showing a fifth preferred embodiment of the disposable syringe according to the present invention in an initial assembled state. FIG. 10 is a cross-sectional view of a fifth preferred embodiment showing the needle cannula fully retracted into the barrel. FIG. 7 is a cross-sectional view of a sixth preferred embodiment of a disposable syringe according to the present invention in an initial assembled state. FIG. 10 is a cross-sectional view of a sixth preferred embodiment showing the needle cannula fully retracted into the barrel. FIG. 7 is a cross-sectional view showing a seventh preferred embodiment of a disposable syringe according to the present invention in an initial assembled state. FIG. 10 is a cross-sectional view showing an eighth preferred embodiment of a disposable syringe according to the present invention in an initial assembled state. FIG. 10 is a cross-sectional view showing a ninth preferred embodiment of a disposable syringe according to the present invention in an initial assembled state. FIG. 14 is a cross-sectional view showing a tenth preferred embodiment of the disposable syringe according to the present invention in an initial assembled state. FIG. 16 is a cross-sectional view of the tenth preferred embodiment showing the needle cannula fully retracted into the barrel. FIG. 14 is a cross-sectional view of the eleventh preferred embodiment of a disposable syringe according to the present invention showing the needle cannula fully retracted into the barrel.

  Before the present invention is described in more detail, it should be noted that the same reference numerals are used throughout the specification to indicate equivalent elements.

1-4, a first preferred embodiment of a disposable syringe according to the present invention comprises a barrel 1, a lunge member 22, a ring grip 21, a needle cannula 33 and a seat unit 5. The carrier unit 34, the carble 3, the airtight sleeve 17, the key and key groove mechanisms 35 and 126, the holding mechanism 13, the plunger 4, the front and rear protectors 14 and 15, and the biasing member 23. Shown to include.
[Example 1]

  The barrel 1 interconnects the front and rear barrel ends 121, 122 opposite to each other along the axis in the axial direction, and the front and rear barrel ends 121, 122, and the front and rear barrel ends 121, Proximal to the peripheral barrel wall 12 and the rear barrel end 122, including the front and rear wall portions (12a, 12b), each positioned proximal to 122 and defining front and rear compartments (11a, 11b), respectively. And a finger flange 18 (as shown in FIG. 7). The front barrel end 121 defines an insertion opening (121a) that extends axially to communicate with the front compartment (11a). The holding mechanism 124 is in the form of an annular wall, which is arranged in the insertion opening (121a), extends rearward from the front barrel end 121 and terminates at the limit end 1241, between which the receiving space 123 is spaced apart from the front wall portion (12a) in the radial direction. The front and rear wall portions (12a, 12b) have front and rear shoulder abutting portions 127, 128, respectively, and the front and rear shoulder abutting portions are arranged close to the front and rear barrel end portions 121, 122, respectively. Facing forward and backward respectively. An engagement ring 129 is formed on the inner surface of the front wall portion (12a) adjacent to the holding member. A retaining portion 120 in the form of an annular groove 120 is formed on the inner surface of the rear wall portion (12 b) adjacent to the rear barrel end 122.

  The protruding member 22 faces the limit end 1241 and axially limits the limit end by a small gap 220 in the use position (as shown in FIGS. 4 and 6) to allow abutting engagement with the limit end 1241. It has a front protruding end 221 having a resting surface 223 that is spaced from the portion 1241 and faces the receiving space 123, and a ring head 222 opposite to the front protruding end 221 in the axial direction. The ring head 122 has an annular gripping surface (222a) that is spaced from the front wall portion (12a) to define a peripheral gap therebetween.

  The ring grip 21 is sandwiched in a peripheral gap between the annular gripped surface (222a) and the front wall portion (12a) so as to be held by the engagement ring 129, and in the use position, the first friction force So that the surface to be gripped (222a) and the front wall portion (12a) are held by the first frictional force so that the protruding end 221 is protected from the movement away from the limit end 1241. For engagement, it has an inner annular gripping surface (21a) and an outer annular gripping surface (21b). Specifically, the ring head 222 is positioned between the annular gripped surface (222a) and the inner gripping surface (21a) as well as the outer annular grip because of the throttling of the ring grip 21 within the peripheral gap. Made from a flexible material to obtain a biasing force to generate a first frictional force between the surface (21b) and the front wall portion (12a).

  The needle cannula 33 has a tip 332 disposed in front of the front barrel end 121 in the use position, and a communication end 331 opposite to the tip 332 along the axis.

  The seat unit 5 is configured to secure the communicating end 331 therein and has hub sections 51 and 52 proximal and distal to the tip 332. In this embodiment, the proximal and distal hub sections 51, 52 are integrally formed with each other.

  The carrier unit 34 is arranged to be rotatable about the axis between a locked position and a released position (as shown in FIGS. 3 and 5) and is a pressure fit in the distal hub section 52 to terminate in the peripheral portion. And a web 341 extending radially from the distal hub section 52 toward the peripheral barrel wall 12 and a peripheral portion of the web 341, frictionally engaging the ring head 222, and against the ring head 222 And a plurality of push studs 342 that are allowed to rotate. Therefore, as soon as the carrier unit 34 is in the release position, the push stud 342 moves the ring grip 21 forward against the first frictional force in order to release the front protruding end 221 from the limit end 1241. It is allowed to be pushed forward by the pushing force, thereby placing the protruding member 22 in the release position (as shown in FIG. 7). It is noted that the push stud 342 can be integrally formed as a single annular piece.

  The carble 3 includes a glass tubular wall 31 and a seal member 32. The tubular wall 31 is configured to be rotatable about the axis in the rear section (11b), with a front tubular edge surface 311 extending radially so as to be integrally formed with the distal hub section 52 of the seat unit 5. Extending forward to terminate, opposite the front edge surface 311 has an arm-aft tubular flange 313. Tubular wall 31 frictionally and slidably engages rear wall portion (12b). In this embodiment, the tubular wall 31 is made from a glass material. The seal member 32 is fluidly coupled to the tubular wall 31 due to a second frictional force greater than the external torsional force so that the carrier unit 34 is allowed to rotate from the locked position to the release position by the external torsional force. Arranged for close engagement. The seal member 32 cooperates with the tubular wall 31 to be axially spaced from the front tubular edge surface 311 so as to define a sealed chamber (31a) for holding the liquid medicine and to enclose the liquid medicine. It is movable forward to discharge from the stop chamber (31a) to the front tubular edge surface 311, thereby placing the kable 3 in a depleted position (as shown in FIG. 6).

  The airtight sleeve 17 is detachably connected to the seat unit 5 so as to shield the needle cannula 33, and has an elastomer front end 172, so that the tip 332 of the needle cannula 33 is located in the sealed chamber (31a). In order to maintain hermeticity, it is trapped within the elastomer front end 172.

  The key and keyway mechanisms 35 and 126 are formed in a pair of pegs 35 extending radially from the peripheral portion of the web 341 and the rear wall portion (12b), and as shown in FIG. As soon as is moved to the release position, it includes a pair of guide slots 126 respectively extending in the axial direction for sliding movement of the peg 25 in the axial direction.

  The holding mechanism includes a pair of holding grooves 13, which extend laterally with respect to the front end of the guide slot 126 and communicate with the front end of the guide slot 126, respectively, as shown in FIG. Thus, the carrier unit 34 is arranged to hold the peg 35 therein so as to be arranged in the locking position. To seal the retaining groove 13, an annular sealing strip 162 is attached to the rear wall portion (12b).

  The plunger 4 includes first and second plunger bodies 43 and 41. The first plunger body 43 is engaged with the seal member 32 and moves forward with the seal member 32 along the tubular wall 31 against the second frictional force to guide the carpule 3 to the wear position. And a first rear end 431 opposite to the push end 432. The second plunger body 41 has an operating end 42 extending outward from the rear barrel end 122 so as to be exposed to an external torsional force rotating the tubular wall 31 of the carpul 3 together with the carrier unit 34 to the release position, And an opposite second front end 413. The second front end 413 has an inner flange 411 that is greater than the second frictional force so that the seal member 32 is moved forward, thereby placing the carpule 3 in the worn position, and The second plunger body 41 is allowed to move relative to the first plunger body 43 after the push stud 342 has been pushed forward so as to place the protruding member 22 in the open position, whereby the seat unit 5 In addition, the first rear end 431 is releasably held by the third frictional force larger than the first frictional force so that the carpule 3 is allowed to be moved backward to the disposal position. In addition, the second plunger main body 41 has a contact portion 412 disposed at the second front end 413.

  The front protector 14 is detachably sleeved to the front wall portion (12 a) and abuts against the front shoulder abutment 127 to shield the needle cannula 3. The rear protector 15 is detachably connected to the rear wall portion (12 b) and abuts against the rear shoulder abutting portion 128 to shield the plunger 4. Preferably, the front protector 14 is threadedly engaged with the elastomer front end 172 of the airtight sleeve 17. In order to obtain a good sealing effect, the front and rear sealing strips 161 releasably bond the front protector 14 to the front wall portion (12a) and the rear protector 15 to the rear wall portion (12b). It is arrange | positioned so that it may peel and adhere | attach.

  The biasing member 23 is disposed in the accommodation space 123 and has two opposite end portions 231 and 232 that abut against the front barrel end portion 121 and the resting surface 223. Thus, as soon as the projecting member 22 is placed in the release position, the biasing member 23 retracts the tip 332 of the needle cannula 33 into the barrel 1, thereby bringing it into the disposal position as shown in FIG. To position the needle cannula 33, the ring head 222 is biased to push the seat unit 5 and the carble 3 toward the rear barrel end 122.

  With reference to FIGS. 2 and 4, in the injection stroke, the front and rear protectors 14, 15 are first removed to expose the needle cannula 33 and the plunger 4. The operator holds the finger flange 18 (see FIG. 7) with his / her forefinger and middle finger to release air from the sealed chamber (31a) and to adjust the amount of medication as desired. Push the working end 42 of the plunger 4 forward with his / her thumb so that the member 32 is moved forward along the tubular wall 31 of the carpule 3. Due to the second frictional force generated between the sealing member 32 and the tubular wall 31, the operator can hold the barrel with one hand and release the carrier unit 34 to separate the peg 35 from the holding groove 13. An external torsional force can be applied to the plunger 4 to rotate into position. Subsequently, the drug is introduced into the patient receptacle through the needle cannula and the carpule 3 is placed in the depleted position, whereby the pushing force is applied to the working end to complete the injection stroke, as shown in FIG. Applied to part 42.

  With reference to FIGS. 5-7, an external pushing force is subsequently applied to the working end 42 to push the push stud 342 to move the ring grip 21 forward. In order to abut against the limit end 1241, the protruding member 22 is also moved forward. The gap 220 reduces the frictional resistance between the ring grip 21 and the protruding member 22 and between the ring grip 21 and the front wall portion (12a), thereby facilitating subsequent forward movement of the grip ring 21. In order to do so, it can serve as a starting space 220 that allows slight forward movement of the projecting member 22 and the ring grip 21. Thereafter, since the protruding member 22 is hindered by the limit end 1241, the pushing force applied to the push stud 342 causes the ring grip 21 to be separated from the protruding member 22, thereby placing the protruding member 22 in the released position. To do. At the same time, the push stud 342 is moved into frictional engagement with the gripped surface (222a) of the ring head 222 until the web 341 is obstructed by the protruding member 22. Further, the second plunger body 41 is moved forward with respect to the first plunger body 43 against the third friction force until the periphery 421 of the operating end 42 is held by the holding portion 120 of the barrel 1. Thereby, backward movement of the second plunger body 41 is prevented in order to prevent reuse of the syringe.

  As shown in FIG. 8, as soon as the projecting member 22 is placed in the release position, the biasing force of the biasing member 23 is released to bias the ring head 222 to protrude at the web 341, which is Together with the seat unit 5 and carpule 3, the tip 33 of the needle cannula 33 is moved back into the front section (11a), thereby moving the needle cannula 33 towards the rear barrel end 122 to place it in the disposal position. The At the same time, the first plunger body 43 is completely retracted into the second plunger body 41.

It is noted that the shape and size of the component parts of the disposable syringe described above can be varied. For example, barrel 1, needle cannula 33, carpule 3, and plunger 4 can be made longer to make the syringe suitable for performing deep injections.
[Example 2]

Referring to FIGS. 9-11, a second preferred embodiment of a disposable syringe according to the present invention is shown to be similar in construction to the previous embodiment. In the second embodiment, the proximal hub section 51 of the seat unit 5 extends from the fixed end 511 in which the connecting end 331 of the needle cannula 33 is fixed, and extends axially from the fixed end 511, and A sleeve end 512 that is removably sleeved to the distal hub section 52 to communicate the communication end 331 with the sealed chamber (31a). In addition, a tip protector 37 is sleeved to the proximal hub section 51 to cover the needle cannula 33. Thus, the needle cannula 33, proximal hub section 51, and tip protector 37 are assembled as a needle assembly. The hermetic sleeve 17 is sleeved to the distal hub section 52 to maintain the hermeticity of the sealed chamber (31a) prior to use.
[Example 3]

Referring to FIGS. 12 and 13, a third preferred embodiment of a disposable syringe according to the present invention is shown to be similar in construction to the first embodiment. In a third embodiment, an annular gasket 38 made of plastic material is disposed on the annular flange 313 of the tubular wall 31 and has an annular shoulder 381 extending radially inward. Therefore, when the carpul 3 is in the exhausted position, the abutting portion 412 of the plunger 4 abuts against the annular shoulder 381 in order to apply a pushing force from the plunger 4 to the carpul 3.
[Example 4]

Referring to FIGS. 14, 14 (A) and 15, a fourth preferred embodiment of a disposable syringe according to the present invention is shown to be similar in construction to the first embodiment. In the fourth embodiment, the peripheral barrel wall 12 further includes an enlarged wall portion (12 c) that extends from the rear wall portion (12 b) to the rear barrel end 122. Thus, the carple 3 can be a conventional prefilled syringe that is housed within the inner surface of the enlarged wall portion (12c) and is slidable along the inner surface of the enlarged wall portion (12c). In addition, when the carrier unit 34 is rotated to the locked position, the finger flange 39 is held by the ribs (12d), so that the plurality of ribs ( 12d) extends radially inward from the enlarged wall portion (12c).
[Example 5]

Referring to FIGS. 16 and 17, a fifth preferred embodiment of a disposable syringe according to the present invention is shown to be similar in construction to the first embodiment. In the fifth embodiment, the tubular wall 31 of the carpule 3 is thermoplastically molded and the web 341 of the carrier unit 34 is formed integrally with the front tubular edge surface 311.
[Example 6]

18 and 19, the sixth preferred embodiment of the disposable syringe according to the present invention is shown to be similar in construction to the fifth embodiment. In the sixth embodiment, the peg 35 of the key and keyway mechanism is located in the rear annular flange 313 of the carpule 3 and the guide slot 126 is adjacent to the rear barrel end 122 and the rear wall portion (12 b) of the barrel 1. And has a length shorter than that of the first embodiment.
[Examples 7 to 9]

Referring to FIGS. 20-22, seventh through ninth preferred embodiments of the disposable syringe according to the present invention are shown similar to the first, third, and fourth embodiments, respectively. In the seventh to ninth embodiments, the carrier unit 34 further includes a large-diameter peripheral portion 343 extending forward of the web 341 along the axis and surrounding the seat unit 5, and a large axis along the axis so as to surround the needle cannula 33. A small diameter peripheral portion 344 that extends forward from the radial peripheral portion 343 and terminates at a forward converging end 345 configured to securely hold the needle cannula 33 in the in-use position. Thus, bending of the needle cannula 33 can be prevented during use.
[Example 10]

  Referring to FIGS. 23 and 24, a tenth preferred embodiment of a disposable syringe according to the present invention is shown to be similar to the first embodiment. In this embodiment, the plunger 4 has a unitary structure, i.e., the push end 432 is formed integrally with the working end 42. In addition, a tubular barrier 125 such as a ring extends radially inward from the rear barrel end 122 of the barrel 1. Thus, when the carpule 3 is biased to the disposal position, as shown in FIG. 24, the tubular barrier 125 can prevent accidental movement of the carpule 3 exiting the barrel 1. It will be noted that the first to ninth embodiments may include such an integral plunger 4 instead of having the first and second plunger bodies 43, 41.

Further, the holding mechanism 13 further includes a rear holding groove (13 a) that extends laterally to the guide slot, communicates with the guide slot 126, and is disposed on the opposite side of the front holding groove 13. Thus, after the needle cannula 33 is placed in the disposal position, the operator can rotate the plunger 4 to guide the peg 35 into the rear holding groove (13a) in order to protect the carpule 3 from accidental movement. .
[Example 11]

  Alternatively, referring to FIG. 25, in an eleventh preferred embodiment of a disposable syringe according to the present invention, similar to the tenth embodiment, instead of the rear retaining groove (13a), the peripheral barrel wall 12 is An annular elastomeric member (125 a) disposed in front of and spaced from the tubular barrier 125 is included. Thus, when the carpule 3 is urged to the disposal position, the rear annular flange 313 or 39 of the carple 3 holds the rear annular flange 313 between the elastomeric member (125a) and the tubular barrier 125, thereby making the carpule In order to protect 3 from forward movement, it is moved to slide over the elastomeric member (125a).

  As illustrated, the disposable syringe of the present invention has the following advantages.

  1. Since the carpule 3 can be preassembled in the barrel, the clinical injection work by the medical worker is simplified and convenient to perform. In addition, the syringe can be conveniently made non-reusable after injection in a single operation.

  2. Because of the airtight sleeve 17, the airtightness of the sealed chamber (31a) can be ensured. Due to the front and rear guards 14, 15 and the sealing strips 161, 162, the needle cannula 33 and the plunger 4 can be sealed and sterilized.

  3. Because of the engagement between the carrier unit 34 and the protruding member 22, the key and keyway mechanisms 35, 126, and the holding mechanism 13, the carpule 3 can be firmly held in the barrel 1 before use. The injection and needle retraction operations are stable and smooth.

  4). The operating end 42 of the plunger 4 is held with the holding portion 120 of the barrel 1 to prevent backward movement of the plunger 4 after the operating end 42 has been fully pushed into the barrel 1 so that the syringe can be reused. Can be prevented.

  Although the invention has been described with respect to what is considered to be the most practical and preferred embodiments, the invention is not limited to the disclosed embodiments and is within the spirit and scope of the broadest interpretation and equivalent construction. It is intended to cover the various configurations involved.

Claims (6)

A disposable syringe with a built-in carpule,
A front and rear barrel ends (121, 122) opposite to each other along the axis in the axial direction and interconnected with the front and rear barrel ends (121, 122), the front and rear barrel ends A peripheral barrel wall (12) including front and rear wall portions (12a, 12b) respectively disposed proximally to the section (121, 122) and defining front and rear compartments (11a, 11b), respectively; The front barrel end (121) defines an insertion opening (121a) in communication with the front compartment (11a),
A needle having a tip (332) disposed in front of the front barrel end (121) in a use position and a connecting end (331) opposite to the tip (332) along the axis A cannula (33),
A seat unit (5) configured to secure the communication end (331) therein and having hub sections (51, 52) proximal and distal to the tip (332). Including
Including carpule (3),
A front tubular edge surface (311) configured to be rotatable within the rear section (11b) about the axis and extending radially to be integrally formed with the distal hub section (52) Including a tubular wall (31) extending forward to terminate;
Because of the second frictional force, it includes a seal member (32) arranged to fluidly engage the tubular wall (31), the seal member (32) cooperating with the tubular wall (31). And spaced apart from the tubular edge surface (311) in the axial direction so as to define a sealed chamber (31a) for holding the liquid medicine, the liquid medicine from the sealed chamber (31a) to the front Discharges to the tubular edge surface (311), thereby moving forward to place the carpule in a depleted position;
A disposable syringe with a built-in carpule,
It is disposed in the insertion opening (121a), extends rearwardly terminating at the limit end (1241), and radially extends from the front wall portion (12a) so as to define a receiving space (123) therebetween. A holding member (124) spaced apart;
A projecting member (22), the projecting member comprising:
A forward projecting end (A) having a resting surface (223) that is axially facing and abutting against the limit end (1241) and facing the receiving space (123) 221),
A ring head having an annular gripped surface (222a) axially opposite the forward projecting end (221) and spaced from the front wall portion (12a) to define a circumferential gap therebetween. 222),
In the use position, the first frictional force is disposed in the peripheral gap so that the first frictional force protects the forward projecting end (221) from moving in a direction away from the limit end (1241). A ring having an inner annular gripping surface (21a) and an outer annular gripping surface (21b), which are releasably engaged with the gripped surface (222a) and the front wall portion (12a), respectively. Including a grip (21),
A carrier unit (21) arranged to be rotatable with the carpule (3) about the axis between a locked position and a released position by an external torsional force, the carrier unit (34) comprising a push stud ( 342) and the push stud (342) releases the forward projecting end (221) from the limit end (1241) as soon as the carrier unit (34) is in the release position, thereby In order to place the protruding member (22) in the release position, the push stud (342) is pushed forward by a pushing force that moves the ring grip (21) forward against the first frictional force. Configured to be allowed to
A holding mechanism (13) arranged to prevent the carrier unit (34) from moving in a direction away from the locking position;
A key arranged to guide the tubular wall (31) to move axially along the rear wall portion (12b) as soon as the carrier unit (34) is moved to the release position; Including a keyway mechanism (35, 126),
A plunger (4), the plunger
The seal member (32) is moved along the tubular wall (31) against the second frictional force to engage the seal member (32) and guide the carpule (3) to the wear position. Has a push end (432) that moves forward,
The rear barrel end (122) is axially opposite the push end (432) and exposed to an external torsional force that rotates the tubular wall (31) with the carrier unit (34) to the release position. ) Having an operating end (42) extending outwardly from
The biasing member includes a biasing member, and the biasing member is configured so that the biasing member is inserted into the tip end portion (332) of the needle cannula (33) as soon as the protruding member (22) is disposed at the release position. ) In the barrel (1), thereby placing the distal hub section (52) and the carpule (3) in the rear barrel end (in order to place the needle cannula (33) in a disposal position. 122) arranged in the receiving space (123) to abut against the resting surface (223) to urge the ring head (222) to push towards
Disposable syringe with built-in carpule.   The carrier unit (34) includes a web (341) extending radially from the distal hub section (52) toward the peripheral barrel wall (12) to terminate in a peripheral portion, the push stud (342) As soon as the projecting member (22) is arranged in the release position, the ring head (222) is urged by the urging member (23) to project by the web (341). The disposable syringe with a built-in carpul according to claim 1, wherein the disposable syringe is formed with the peripheral portion. The plunger (4)
The push end (432) arranged to engage with and move with the seal member, and a first rear end (431) opposite the push end (432). A plunger body (43);
A second front end (413) that is on the opposite side of the operating end (42) and is releasably held at the first rear end (431) by a third frictional force. And the second frictional force allows the seal member (32) to move forward, thereby placing the carpul in the worn position. In order to do this, after the push stud (432) is pushed forward to place the protruding member (22) in the solution position, the second plunger body (41) is larger than the second frictional force. ) Is allowed to move relative to the first plunger body (43), thereby allowing the seat unit (5) and the carpule (3) to be retracted back to the disposal position. The first It is larger than the frictional force,
A disposable syringe comprising the built-in carpul according to claim 1.   The tubular wall (31) of the carpule (3) has a rear annular flange (313) opposite the front annular edge surface (311), and the disposable syringe is attached to the rear annular flange (313). And further including an annular gasket (38) having an annular shoulder (381) disposed and extending radially inward, wherein the second plunger body (41) is disposed at the second front end (413). In order to apply the pushing force from the plunger (4) to the carpule (3), the carpule (3) abuts against the annular shoulder (381) when in the worn position. Disposable syringe with a built-in carpul according to claim 3, characterized in that it has an abutment (412) configured as follows. The front and rear wall portions (12a, 12b) are arranged adjacent to the front and rear barrel ends (121, 122), respectively, and face front and rear shoulder abutments (respectively). 127, 128) respectively,
The disposable syringe further includes:
A front protector (14) removably sleeved to the front wall portion (12a) and abutting against the front shoulder abutment (127) to shield the needle cannula (33);
A rear protector (15) that is detachably sleeved to the rear wall portion (12b) and abuts against the rear shoulder abutment (128) to shield the plunger (4). Characterized by the
A disposable syringe comprising the built-in carpul according to claim 1.   The forward projecting end (221) of the projecting member (22) is separated from the limit end (1241) by a small gap (220) in the use position, so that the gap (220) is projected forward. After the projecting member (22) is moved forward by the ring grip (21) so that the end (221) is brought into contact with the limit end (1241), the rear of the projecting member (22). Disposable syringe with built-in carpul according to claim 1, characterized in that it serves as a starting space (220) for facilitating movement.

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