The present invention relates to a syringe, and especially to a syringe that can be assembled with a medicine vial to perform quantitative output of medicament liquid for multiple times, and can be replaced with another full medicine vial for reuse after medicament liquid in the medicine vial is completely used up.
Based on the safety regulations for medicament liquid injection, a conventional syringe already has a function of being repeatedly used for a limited times. The conventional syringes are distinguished into a type of dose metering syringes and a type of frequency metering syringes. Regarding a conventional dose metering syringe, after the dose metering syringe is connected to a medicine vial, a pushing rod disposed at a rear end of the syringe is pushed, and a piston in the medicine vial is pushed to move for a predetermined distance via an interaction of a pushing mechanism mounted therein, thereby outputting a predetermined dose of medicament liquid through a needle connected to a front end of the medicine vial.
The conventional dose metering syringe is capable of achieving the function of outputting a predetermined dose of medicament liquid or further has a function of labor-saving in manipulation. However, after the medicament liquid in the medicine vial connected to the conventional dose metering syringe is used up, because the pushing mechanism in the syringe does not have a function to return to an original condition, all the conventional syringes need to be discarded and cannot be reused.
The technical problem to be solved by the present invention is: to provide a syringe to solve the problem that the conventional dose metering syringe cannot restore an original condition to be reused after being used.
The technical solution proposed by the present invention is: to provide a syringe detachably assembled with a medicine vial containing medicament liquid and a needle component connected to a front end of the medicine vial. Wherein the syringe defines a central axis extending along a front-to-rear direction of the syringe; the syringe comprises an injection mechanism. The injection mechanism has an injection mode and a standby mode, and is able to be manually triggered to perform a conversion between the injection mode and the standby mode. The injection mechanism comprises:
a housing having a movable space formed through the housing along the central axis, a front end of the housing detachably connected to the medicine vial; and a one-way ratchet portion formed on a peripheral wall of the movable space at a front segment of the movable space of the housing;
a spiral pushing assembly mounted in the movable space of the housing and being capable of spirally moving around the central axis; the spiral pushing assembly extending to an outside of a rear end of the housing; and the spiral pushing assembly being able to be pushed to generate a spiral propulsion;
a metering guide sleeve mounted in the housing, being capable of rotating at a fixing point; and the metering guide sleeve inserted into the spiral pushing assembly and able to be controlled to connect and rotate with the spiral pushing assembly; the metering guide sleeve comprising a guide sleeve body and multiple non-return ratchet buckles; the guide sleeve body having a guide sleeve central hole, at least one spiral portion formed on an inner peripheral wall of the guide sleeve central hole; a guide sleeve threaded portion formed on a rear segment of an outer peripheral surface of the guide sleeve body; and a guide sleeve front end portion formed at a front end of the guide sleeve body; the multiple non-return ratchet buckles formed on an external surface of the guide sleeve front end portion; when the multiple non-return ratchet buckles controlled to engage with the one-way ratchet portion of the housing, the metering guide sleeve solely driven to rotate forwardly and in said injection mode; when the multiple non-return ratchet buckles disengaging from the one-way ratchet portion of the housing, the metering guide sleeve able to rotate forwardly or backwardly and in said standby mode;
a total volume control nut mounted in the spiral pushing assembly, being capable of linearly moving along the central axis, and screwed with the guide sleeve threaded portion at a rear segment of the metering guide sleeve;
a diagonal tension knob mounted in the front end of the housing and being movable along the central axis; the diagonal tension knob being drivable to change an engaging condition of the non-return ratchet buckles relative to the one-way ratchet portion of the housing and to convert the said injection mode and the said standby mode; and
a metering screw inserted in the diagonal tension knob and the housing and the metering screw screwed within the metering guide sleeve; the metering screw having a screw body having a screw threaded portion and the metering screw screwed with said spiral portion inside the metering guide sleeve via the screw threaded portion; a front end of the metering screw extending in front of the diagonal tension knob; a spiral movement of the metering guide sleeve able to drive the metering screw to move linearly along the central axis inside the housing to perform a quantitative output of the medicament liquid in the medicine vial; when the injection mechanism in the standby mode, the metering screw being able to linearly move backward and be received into the housing along the central axis.
According to the above-mentioned syringe, the syringe comprises a cartridge sleeve. The cartridge sleeve has a containing space formed through and within the cartridge sleeve along the central axis. The cartridge sleeve is detachably installed to the medicine vial, and a front end of the cartridge sleeve is detachably installed to the needle component. The cartridge sleeve is able to be connected to the front end of the housing of the injection mechanism. The cartridge sleeve is able to trigger the diagonal tension knob to move backward and to drive the multiple non-return ratchet buckles to engage with the one-way ratchet portion of the housing and in the said injection mode. When the cartridge sleeve is detached from the front end of the housing of the injection mechanism, the diagonal tension knob is able to move forward to make the multiple non-return ratchet buckles disengage from the one-way ratchet portion of the housing and in the said standby mode.
According to the above-mentioned syringe, the cartridge sleeve comprises a cartridge body. The cartridge body has at least one viewing window formed in a peripheral wall of the cartridge body. A connection portion is formed at a rear end of the cartridge body. A positioning flange is formed on the peripheral wall of the cartridge body and located at a front end of the connection portion. Multiple engaging protrusions are formed on an outer peripheral surface of the connection portion. The front end of the housing is a cartridge sleeve connecting portion. Multiple L-shaped engaging grooves are formed in an inner peripheral wall of the cartridge sleeve connecting portion. Each L-shaped engaging groove includes a straight groove section being parallel to the central axis and a transverse section connected to a rear end of the straight groove section. When the connection portion at the rear end of the cartridge sleeve is inserted into the cartridge sleeve connecting portion at the front end of the housing, each engaging protrusion is able to slide along the straight groove section of a respective one of the L-shaped engaging grooves and to turn into an end of the transverse section of the respective one of the L-shaped engaging grooves to lock the cartridge sleeve to the front end of the housing.
According to the above-mentioned syringe, a guiding ring is formed in the front end of the housing. An outer peripheral surface of the guiding ring is connected to the peripheral wall of the movable space via multiple arms. A spacing is formed between the guiding ring and the peripheral wall of the movable space. At least one guiding block is formed on an inner annular wall of the guiding ring. The screw body of the metering screw has at least one axial guiding groove passing through the screw threaded portion and being parallel to the central axis. The axial guiding groove engages with the guiding block inside the guiding ring of the housing.
According to the above-mentioned syringe, each non-return ratchet buckle has a wing protruding forwardly and disposed at a front end face of the non-return ratchet buckle. The diagonal tension knob has a conical surface abutting against the wing of each non-return ratchet buckle to let the conical surface of the diagonal tension knob push the non-return ratchet buckle to engage with the one-way ratchet portion of the housing via the wing.
According to the above-mentioned syringe, the syringe comprises a cartridge sleeve. The cartridge sleeve has a containing space formed through and within the cartridge sleeve along the central axis. The cartridge sleeve is detachably installed to the medicine vial, and a front end of the cartridge sleeve is detachably installed to the needle component. The cartridge sleeve is able to be connected to the front end of the housing of the injection mechanism. The cartridge sleeve is able to trigger the diagonal tension knob to move backward and to drive the multiple non-return ratchet buckles to engage with the one-way ratchet portion of the housing and in the said injection mode. When the cartridge sleeve is detached from the front end of the housing of the injection mechanism, the diagonal tension knob is able to move forward to make the multiple non-return ratchet buckles disengage from the one-way ratchet portion of the housing and in the said standby mode.
According to the above-mentioned syringe, the cartridge sleeve comprises a cartridge body. The cartridge body has at least one viewing window formed in a peripheral wall of the cartridge body. A connection portion is formed at a rear end of the cartridge body. A positioning flange is formed on the peripheral wall of the cartridge body and located at a front end of the connection portion. Multiple engaging protrusions are formed on an outer peripheral surface of the connection portion. The front end of the housing is a cartridge sleeve connecting portion. Multiple L-shaped engaging grooves are formed in an inner peripheral wall of the cartridge sleeve connecting portion. Each L-shaped engaging groove includes a straight groove section being parallel to the central axis and a transverse section connected to a rear end of the straight groove section. When the connection portion at the rear end of the cartridge sleeve is inserted into the cartridge sleeve connecting portion at the front end of the housing, each engaging protrusion is able to slide along the straight groove section of a respective one of the L-shaped engaging grooves and to turn into an end of the transverse section of the respective one of the L-shaped engaging grooves to lock the cartridge sleeve to the front end of the housing.
According to the above-mentioned syringe, the housing has at least one spiral guiding rib formed on an inner peripheral wall of the housing. The spiral pushing assembly comprises a driving spiral tube, a clutch sleeve, and an output button. Wherein:
The driving spiral tube is mounted and is capable of spirally moving in the movable space of the housing. The driving spiral tube has a spiral tube channel formed through the driving spiral tube along the central axis, a guiding curved surface formed at a front segment of the spiral tube channel and converging forwardly along the central axis, a driving spiral guiding groove formed in an external peripheral wall of the driving spiral tube and screwed with the at least one spiral guiding rib of the housing, and a spiral tube rear end portion disposed at a rear end of the driving spiral tube. The spiral tube rear end portion extends to an outside of the rear end of the housing and blocked by the rear end of the housing.
The clutch sleeve is mounted in the spiral tube channel of the driving spiral tube and is able to move linearly relative to the driving spiral tube. The clutch sleeve has a sleeve body, multiple flexible locking claws formed at a front end of the sleeve body, and a connecting end portion disposed at a rear end of the sleeve body. A sleeve channel is formed in the sleeve body and extending along the central axis. At least one sleeve guide groove portion is formed on a peripheral wall of the sleeve channel and is parallel to the central axis. The multiple flexible locking claws have flexibility for radial expansion and contraction. When the clutch sleeve is moved frontward relative to the driving spiral tube, the multiple flexible locking claws are abutted by the guiding curved surface at a front end of the driving spiral tube and contract radially; and the multiple flexible locking claws are capable of bouncing backward to an original position along the guiding curved surface and expand.
The output button is disposed at an outside behind the rear end of the housing and is connected with the connecting end portion at a rear end of the clutch sleeve.
The metering guide sleeve is inserted in the driving spiral tube and the clutch sleeve and is able to be clamped by the multiple flexible locking claws of the clutch sleeve.
The total volume control nut has at least one flange rib formed on an outer peripheral surface of the total volume control nut and engaging with said at least one sleeve guide groove portion of the clutch sleeve.
According to the above-mentioned syringe, each of the flexible locking claws has a locking surface formed at an inner surface of the flexible locking claw. The locking surface of each of the flexible locking claws has multiple straight stripes extending along a front-to-back direction. The metering guide sleeve has an engaging surface formed on the outer peripheral surface, located between the guide sleeve front end portion and the guide sleeve threaded portion, of the guide sleeve body. The engaging surface has multiple straight stripes being parallel to the central axis and corresponding to the straight stripes of the locking surfaces of the flexible locking claws for engagement.
According to the above-mentioned syringe, the housing has a scale observing window formed at a rear section of an external peripheral wall of the housing; the driving spiral tube has a spiral scale portion formed on the external peripheral wall of the driving spiral tube and being parallel to the driving spiral guiding groove; the spiral scale portion has multiple scale lines able to be observed through the scale observing window of the housing.
The beneficial effect that can be achieved by the present invention is that when the syringe is in use, the front end of the injection mechanism is connected to the medicine vial, with the whole arrangement of the syringe, the injection mechanism can be manually triggered to covert between the injection mode and the standby mode. Wherein, when the diagonal tension knob of the injection mechanism is triggered to move backward, the multiple non-return ratchet buckles are driven to engage with the one-way ratchet portion of the housing to be in the injection mode to provide a function of quantitatively outputting medicament liquid. After the medicament liquid in the medicine vial is used up, the medicine vial is removed, the injection mechanism can be manually triggered to move the diagonal tension knob frontward. Whereby, the non-return ratchet buckles are disengaged from the one-way ratchet portion of the housing to be in the standby mode. So the metering screw can be directly manually pushed back to the default position. The metering guide sleeve is driven to rotate backwardly at the same time. The total volume control nut is moved back to the initial full position of the metering guide sleeve. Accordingly, the syringe can be reused.
The syringe of the present invention can further use the cartridge as a triggering component to convert the injection mechanism between the injection mode and the standby mode. The cartridge has functions of installing the medicine vial and the needle component. When the cartridge is mounted to the front end of the housing of the injection mechanism, the diagonal tension knob is pushed to automatically move backward to drive the multiple non-return ratchet buckles to engage with the one-way ratchet portion of the housing to be in the injection mode. When the cartridge is detached from the front end of the housing of the injection mechanism, the diagonal tension knob can move forward to allow the non-return ratchet buckles to disengage from the one-way ratchet portion of the housing to be in the standby mode.
The syringe of the present invention may further have the guiding ring in the front end of the housing. The guiding ring is spaced from the peripheral wall of the movable space. The at least one guiding block is formed on the inner annular surface of the guiding ring. The screw body of the metering screw has an axial guiding groove passing through the screw threaded portion and being parallel to the central axis. The axial guiding groove is engaged with the guiding block in the guiding ring of the housing. Thus, when the medicament liquid in the medicine vial is used up, the user detaches the cartridge with the medicine vial from the front end of the housing, the non-return ratchet buckles of the metering guide sleeve are disengaged from the one-way ratchet portion of the housing to release the unidirectional restriction, and the axial guiding groove of the metering screw can be aligned with the guiding block in the guiding ring of the housing. So the metering screw extending out from the housing can be quickly and directly pushed back to position along the central axis to drive the metering guide sleeve to rotate backwardly and to move the total volume control nut back to the initial full position of the metering guide sleeve along the central axis, thereby enhancing convenience of use.
The spiral pushing assembly of the syringe of the present invention may further comprise the driving spiral tube, the clutch sleeve, and the output button. Wherein, the driving spiral tube is spirally movably mounted in the housing. The front end segment of the spiral tube channel is formed as the guiding curved surface. The clutch sleeve is spirally moved in the spiral tube channel of the driving spiral tube. The rear end of the clutch sleeve extends out from the rear end of the housing and is connected with the output button. The clutch sleeve has the multiple flexible locking claws formed on the front end of the sleeve body thereof. The multiple flexible locking claws have flexibility for radial expansion and contraction. When the clutch sleeve is moved forward relative to the driving spiral tube, the multiple flexible locking claws are abutted against the guiding curved surface at the front end of the driving spiral tube to be radially contracted to clamp the metering guide sleeve. So the metering guide sleeve, the clutch sleeve, and the driving spiral tube can be rotated together. The multiple flexible locking claws can spring back to position along the guiding curved surface to expansion to release the metering guide sleeve. Accordingly, the metering guide sleeve is smoothly and reliably engaged with and disengaged from the metering guide sleeve.
The syringe of the present invention may further have the scale observing window formed at the external peripheral wall of the housing. The driving spiral tube has a spiral scale portion formed on the external peripheral wall of the driving spiral tube and being parallel to the driving spiral guiding groove. The spiral scale portion has multiple scale lines observed through the scale observing window of the housing. So the driving spiral tube as a single component have functions of driving and dose scale display.
The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention. Wherein:
A central axis; 1 cartridge sleeve; 10 cartridge body; 100 containing space; 11 needle connecting portion; 12 connection portion; 13 positioning flange; 14 viewing window; 15 engaging protrusion; 2 injection mechanism; 20 housing; 200 movable space; 21 cartridge sleeve connecting portion; 211 L-shaped engaging groove; 22 guiding ring; 221 guiding block; 23 one-way ratchet portion; 24 arm; 25 spiral guiding rib; 26 scale observing window; 2A spiral pushing assembly; 30 driving spiral tube; 31 spiral tube channel; 32 guiding curved surface; 33 driving spiral guiding groove; 34 spiral tube rear end portion; 35 spiral scale portion; 40 clutch sleeve; 41 sleeve body; 42 flexible locking claw; 421 locking surface; 43 connecting end portion; 44 sleeve channel; 45 sleeve guide groove portion; 50 output button; 60 metering guide sleeve; 61 guide sleeve body; 62 non-return ratchet buckle; 621 wing; 63 guide sleeve central hole; 64 guide sleeve front end portion; 65 spiral portion; 66 guide sleeve threaded portion; 67 engaging surface; 70 total volume control nut; 71 flange rib; 80 diagonal tension knob; 81 inner hole; 82 conical surface; 90 metering screw; 91 screw body; 92 screw front end portion; 93 screw threaded portion; 94 axial guiding groove; 3 medicine vial; 3A needle component; 3B needle cap; 3C piston; 4 protection cap.
The following describes the technical means adapted by the present invention to achieve the intended purpose of the invention in conjunction with the drawings and the preferable embodiments of the present invention.
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For convenience of illustration of the specific structure of the syringe of the present invention, the preferable embodiment shown in
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The output button 50 is disposed outside the rear end of the housing 20 and is pivotally connected with the connecting end portion 43 at a rear end of the clutch sleeve 40. The output button 50 is adapted to provide an operational component for the user.
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In the preferable embodiment, the diagonal tension knob 80 is mounted in the cartridge sleeve connecting portion 21 at the front end of the housing 20, through the space between the peripheral wall of the movable space 200 and the outer annular surface of the guiding ring 22, and has an inner hole 81 formed through the diagonal tension knob 80 along the central axis A. The diagonal tension knob 80 has a conical surface 82 having diameters gradually increasing forwardly. A rear section of the conical surface 82 abuts the wings 621 of the non-return ratchet buckles 62. When the diagonal tension knob 80 is forced to move backward, the diagonal tension knob 80 can drive the non-return ratchet buckles 62 of the metering guide sleeve 60 to expand radially by a radial and diagonal pushing force of the conical surface 82, and the non-return ratchet buckles 62 and one-way ratchet portion 23 of the housing 20 engage with each other. When the diagonal tension knob 80 is force free, the non-return ratchet buckles 62 contract through their own elasticity to disengage from the one-way ratchet portion 23 of the housing 20 and push the conical surface 82 of the diagonal tension knob 80 and make the diagonal tension knob 80 move forwardly to restore.
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When the syringe of the present invention uses the cartridge sleeve 1 as a triggering component to convert the modes of the injection mechanism 2, as shown in
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Regarding the condition of use of the syringe of the present invention, take the preferable embodiment of the syringe shown in
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The above are only the preferred embodiments of the present invention and do not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the professional technology, without departing from the scope of the technical solution of the present invention, can make use of the technical content disclosed above to make slight changes or modification into equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention is based on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments by technical essence still fall within the scope of the technical solutions of the present invention.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2020/087378 | 4/28/2020 | WO |