CN209630354U - Syringe and assisted quantitative device for syringe - Google Patents
Syringe and assisted quantitative device for syringe Download PDFInfo
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- CN209630354U CN209630354U CN201821629551.4U CN201821629551U CN209630354U CN 209630354 U CN209630354 U CN 209630354U CN 201821629551 U CN201821629551 U CN 201821629551U CN 209630354 U CN209630354 U CN 209630354U
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- plunger rod
- dosage
- snap ring
- syringe
- shoulder
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Abstract
This application involves syringe and for the assisted quantitative device of syringe.Assisted quantitative device for syringe includes: with plunger rod proximally and distally；And the dosage snap ring that is sheathed on the plunger rod periphery and can be moved axially along the plunger rod.The dosage snap ring is configured to rotate in a circumferential direction from first position to the second position relative to the plunger rod.When the dosage snap ring rotates in a circumferential direction from the first position to the second position, the plunger rod in axial direction distally can move a distance relative to the dosage snap ring.
Description
Technical field
This application involves syringes, more particularly relate to the assisted quantitative device of syringe.
Background technique
Traditional syringe is equipped with dosage marking line usually on syringe, and medical staff passes through naked-eye observation when in use
The distal end of plunger is set to be directed at the corresponding dosage marking line on syringe before and after injection, to provide the injection dosage needed to patient.
However, causing medical staff to be difficult to that the distal end of plunger is accurately positioned and makes due to the influence of the factors such as observation visual angle, light intensity
It is directed at corresponding dosage marking line, so as to cause injection dosage inaccuracy.Especially for small size syringe, such as ophthalmic
Syringe, wherein required usually only about 0.1 milliliter or smaller of injection dosage, however conventional syringe dosage marking line is most
Small is 0.1 milliliter, only cannot achieve the injection dosage less than 0.1 milliliter by human eye control.It can not be real in view of traditional syringe
Existing accurate injection especially realizes low dose of accurate injection, therefore one kind is badly in need of in this field can accurately control injection dosage
Syringe and assisted quantitative device.
Utility model content
In view of the problems of the existing technology, one of goal of the invention of the invention is to provide a kind of novel assisted quantitative dress
It sets and the syringe comprising the assisted quantitative device, without medical staff's naked eyes check and correction dosage, to avoid the collimation error.And
And syringe of the invention can be precisely controlled injection dosage, and injection of the pre-filled syringe less than 0.1 milliliter may be implemented
Amount.
According to the one aspect of the application, a kind of assisted quantitative device for syringe is provided comprising: there is proximal end
With the plunger rod of distal end；And the dosage snap ring that is sheathed on the plunger rod periphery and can be moved axially along the plunger rod.Institute
Dosage snap ring is stated to be configured to rotate in a circumferential direction from first position to the second position relative to the plunger rod.When the dosage
When snap ring rotates in a circumferential direction from the first position to the second position, the plunger rod can be in axial direction relative to described
Dosage snap ring distally moves a distance.
According to the another aspect of the application, a kind of syringe is provided, the syringe includes: syringe；It is mounted slidably
Plunger in the syringe；And assisted quantitative device.The assisted quantitative device includes: with plunger proximally and distally
Bar；And the dosage snap ring that is sheathed on the plunger rod periphery and can be moved axially along the plunger rod.The dosage snap ring quilt
It is constructed to be permeable to rotate in a circumferential direction from first position to the second position relative to the plunger rod.When the dosage snap ring is from described
When one position rotates in a circumferential direction to the second position, the plunger rod can be in axial direction relative to the dosage snap ring to remote
Extreme direction moves a distance.
By considering that the detailed description and the accompanying drawings, other aspects of the present invention will become obvious.
Detailed description of the invention
Fig. 1 a and 1b respectively illustrate the exploded view and assembling figure of the syringe 10 of a certain embodiment according to the present invention.
Fig. 2 a and 2b respectively illustrate the main view and cross-sectional view of the plunger rod 102 of a certain embodiment according to the present invention.
Fig. 3 a and 3b respectively illustrate perspective view and the vertical section of the dosage snap ring 104 of a certain embodiment according to the present invention
Figure.
Fig. 4 shows the assisted quantitative device 100 of the assembling of a certain embodiment according to the present invention.
Fig. 5 a-5c respectively illustrates the perspective view, top view and main view of boost motor 200.
Fig. 5 d is shown after assembling plunger rod 102 and boost motor 200, and plunger rod 102 is together with boost motor 200
Cross-sectional view.
Fig. 5 e is shown after assembling plunger rod 102 and boost motor 200, and plunger rod 102 is together with boost motor 200
Cross-sectional view, wherein further illustrating bar shoulder 118.
Fig. 6 shows the schematic diagram of the plunger rod 502 according to another embodiment of the application.
Fig. 7 shows the schematic diagram of the dosage snap ring 504 according to another embodiment of the application.
Fig. 8 a-8c shows the syringe 10 in different use states.
Before any embodiments of the invention are explained in detail, it should be appreciated that application of the invention is not limited to following
The details of the construction shown described in description or in the following figures and the arrangement of component.The present invention can have other implementations
Example and can be practiced or carried out in various ways.Also, it is understood that wording used herein and term are for description
Purpose is not considered as restrictive.
Specific embodiment
Fig. 1 a shows the exploded view of the syringe 10 of a certain embodiment according to the present invention, and wherein syringe 10 includes auxiliary
Proportioning device 100, boost motor 200, syringe 300 and plunger 400.In the illustrated embodiment, assisted quantitative device 100 includes
Plunger rod 102 and it is sheathed on 102 periphery of plunger rod and can be along plunger rod dosage snap ring 104 in axial sliding.Syringe 300 includes
Substantial cylindrical canister portion 301 is equipped with the needle mounting portion for installing injection needle (not shown) in the distal end of canister portion 301, in cylinder
The proximal end in portion 301 is equipped with the flange 302 to extend radially outwardly.Boost motor 200 includes fixing groove 203, and fixing groove 203 can engage
Flange 302, so that boost motor 200 is mounted to syringe 300.
Fig. 1 b shows the syringe 10 of Fig. 1 a under assembled state.As shown in Figure 1 b, after assembling, assisted quantitative fills
It sets 100 plunger rod 102 to combine with plunger 400, the two can be accommodated in the inner cavity of syringe 300 and slide wherein.
Fig. 2 a and 2b respectively illustrate the main view and cross-sectional view of the plunger rod 102 of a certain embodiment according to the present invention.
As shown in Figure 2 a, plunger rod 102 includes proximal end 110 and distal end 111.In this application, proximal end indicates close in a state of use
One end of syringe user of service, and distal end indicates one end in a state of use far from syringe user of service.Implement one
In example, plunger rod 102 includes in the pressing portion 112 of proximal end 110 and from pressing portion 112 to four longitudinal directions of 111 extension of distal end
Rib 117.As shown in Fig. 1 a and 2a, four longitudinal radial arrangements of rib 117, and as shown in Figure 2 b, four longitudinal ribs 117
Cross section is substantially in cross, and a square can be formed by connecting four longitudinal 117 outermost four endpoints of rib.Although
Fig. 1 a and Fig. 2 a merely illustrate three longitudinal ribs, it will be recognized to those skilled in the art that the back side of plunger rod 102 also has
4th lateral rib 117.
With continued reference to Fig. 2 a and 2b, plunger rod 102 further includes adjacent pressing portion 112 and radial from longitudinal rib 117 respectively
Outwardly projecting shoulder 113, and shoulder 113 has the shoulder surface 114 towards distal end 111.Plunger rod 102 further includes four
A positioning protrusion 115, each positioning protrusion 115 are located at four 113 distal sides of shoulder and respectively from four 117 diameters of longitudinal rib
To stretching.In a certain embodiment, the proximal end of positioning protrusion 115 extends since shoulder surface 114, and positioning protrusion 115
The height projected radially outwardly from longitudinal rib 117 is less than the height that shoulder 113 is projected radially outwardly from longitudinal rib 117.It can manage
Solution, the present embodiment only schematically illustrate four longitudinal ribs, four shoulders and four positioning protrusion, those skilled in the art
The quantity (for example, more or less) of longitudinal rib, shoulder and positioning protrusion can be adjusted according to the actual needs.For example, plunger
Bar 102 also can have three of radial arrangement longitudinal ribs, and three shoulders corresponding with three longitudinal ribs and three it is fixed
Position protrusion.Alternatively, plunger rod 102 also can have five longitudinal ribs of radial distribution, and corresponding with five longitudinal ribs
Five shoulders and five positioning protrusion.In addition, the quantity of longitudinal rib, shoulder and positioning protrusion can be different.For example, plunger rod
102 can have four longitudinal ribs as shown in figures 2 a and 2b, but only have and determine positioned at two shoulders of opposite side and two
Position protrusion.Therefore, the application to the particular number of longitudinal rib of plunger rod 102, shoulder and positioning protrusion with no restriction.
As shown in Figure 2 a, plunger rod 102 further includes the columnar projections 119 positioned at distal end 111, the shape of columnar projections 119
With the centre bore for being dimensioned to insertion plunger 400.In a certain embodiment, plunger 400 can be made of elastic material.In
In a certain embodiment, the diameter of columnar projections 119 is equal or slightly larger than the diameter of the centre bore of plunger 400, thus columnar projections
119 form tight fit with the centre bore of plunger 400, and plunger 400 is moved axially together with columnar projections 119.Another
In one embodiment, the diameter of columnar projections 119 is slightly less than the diameter of the centre bore of plunger 400, that is to say, that columnar projections 119
Loose fit is formed with the centre bore of plunger 400, thus when proximally pulling plunger rod 102 relative to syringe 300, plunger 400
It will not be moved to the near end with plunger rod 102, so as to prevent from unexpectedly drawing air into because of medical worker's maloperation
Syringe 300.In a certain embodiment, the height of columnar projections 119 is greater than the height of plunger 400, to insert in columnar projections 119
When entering plunger 400, the distal end of columnar projections 119 is extended to except plunger 400, so that plunger 400 all has over the entire length
Biggish rigidity.When pushing plunger rod 102 and plunger 400 to distal end relative to syringe 300, this configuration can prevent plunger
Frictional force between 400 300 inner surface of outer surface and syringe causes plunger 400 to generate deformation, causes measurement deviation.
In addition, plunger rod 102 may also include elastic pawl 116 and shoulder 118, feature be will be described in more detail below.
Referring now to Fig. 3 a and 3b, Fig. 3 a and 3b respectively illustrate the dosage snap ring 104 of a certain embodiment according to the present invention
Perspective view and longitudinal sectional view.As shown in Figure 3a, dosage snap ring 104 is substantially cylindrical, with the inner surface and the outer surface.Such as
Shown in figure, the outer surface of dosage snap ring 104 can have groove 127, which can increase finger and the agent of operator
Measure the frictional force between snap ring 104.But it will be understood by those skilled in the art that in other embodiments, dosage snap ring 104
Outer surface can have other increase friction structure.For example, the outer surface of dosage snap ring, which can be set, increases the convex of friction
It rises or the outer surface of dosage snap ring can be sprayed into matte surface to increase friction.The outer surface of dosage snap ring 104 can also be with
It is configured to multi-prismatic surface (for example, hexagonal prisms face, eight prismatic surfaces etc.) or other rules or irregular cylinder form.At certain
In a little embodiments, the outer surface of dosage snap ring 104 is also possible to smooth.
With continued reference to 3a, dosage snap ring 104 includes first end face 121, the second end face positioned at distal end positioned at proximal end
129 and from the proximally metering boss 122 outstanding of first end face 121.In a certain embodiment, metering boss 122 includes court
Boss surface 123 proximally.Four metering boss 122 are schematically shown in the embodiment of Fig. 3 a, to match Fig. 2 a institute
Show four shoulders 113 and positioning protrusion 115 of plunger rod 102.It is appreciated that those skilled in the art can be according to shoulder 113
And the quantity of positioning protrusion 115 come adjust metering boss 122 quantity.For example, when only there are two shoulders 113 and two positioning
When protrusion 115, the quantity of metering boss 122 can be only two.
With continued reference to Fig. 2 a and 3a, dosage snap ring 104 can be set in the periphery of plunger rod 102, and can be along plunger rod 102
It slides axially.As shown in Figure 3a, dosage snap ring 104 further includes the positioning groove 124 on surface of setting within it.Positioning groove 124
Be aligned with metering boss 122, and from boss surface 123 along axial direction to distally extending a distance into.When dosage snap ring 104 is along plunger
When bar 102 is slid into close to the position of 102 proximal end of plunger rod, the positioning groove 124 of dosage snap ring 104 can accommodate plunger rod
102 positioning protrusion 115, so that positioning protrusion 115 can slide in positioning groove 124.The boss table of dosage snap ring 104
Face 123 can abut the shoulder surface 114 of plunger rod 102, with prevent dosage snap ring 104 relative to plunger rod 102 proximally into
The axial movement of one step.
As shown in Figure 2 a, plunger rod 102 further includes elastic pawl 116, outer weekly form of the elastic pawl 116 from plunger rod 102
Stretching is faced out, and is configured to hard to bear external force and is radially-inwardly pressed.Fig. 2 a shows two elastic pawls 116, and
And two elastic pawls 116 are arranged on two longitudinal ribs 117 opposite in four longitudinal ribs 117, and are located proximate to
The distal end of positioning protrusion 115.It is appreciated that the quantity of elastic pawl 116 can accordingly be adjusted according to actual needs (for example, one
A, three or four elastic pawls etc.).
Accordingly, as shown in Figure 3b, dosage snap ring 104 includes the positioning engaging portion positioned at its distal end.In the implementation of diagram
In example, positioning engaging portion is configured to anti-back an actor's rendering of an operatic tune 126, and the internal diameter of anti-back an actor's rendering of an operatic tune 126 is greater than 104 proximal part of dosage snap ring
Internal diameter is equipped with cricoid shoulders 128 between 104 proximal part of anti-back an actor's rendering of an operatic tune 126 and dosage snap ring.When being set in plunger
Dosage snap ring 104 on bar 102 from the distal end of plunger rod 102 111 proximally 110 slide into 116 position of elastic pawl when,
The inner surface of the proximal part of dosage snap ring 104 first touches elastic pawl 116 and presses inward against elastic pawl 116, so that its
Occur elastic deformation and against in this interior surface.When the continuation of dosage snap ring 104 is proximally slided, elastic pawl 116 enters
Anti-back an actor's rendering of an operatic tune 126, since the internal diameter of anti-back an actor's rendering of an operatic tune 126 increases, elastic pawl 116 restores original shape under the action of elastic force
Shape.In this case, if attempting to slide dosage snap ring 104 towards distal end, elastic pawl 116 will be resisted against dosage snap ring
In 104 shoulders 128, to prevent dosage snap ring 104 mobile towards distal end.It is appreciated that shoulders 128 arrives boss surface
123 axial distance is less than the distance that elastic pawl 116 arrives shoulder surface 114.
Fig. 4 shows the assisted quantitative device 100 under the assembled state of a certain embodiment according to the present invention, middle dosage card
Shoulder surface 114 of the metering boss 122 of ring 104 against plunger rod 102, and the positioning protrusion of plunger rod 102 115 at this time
In in the positioning groove 124 of dosage snap ring 104.It is appreciated that when the assisted quantitative device 100 is placed vertically, dosage card
Ring 104 can fall due to gravity, until elastic pawl 116 abuts the shoulders 128 of dosage snap ring 104.In addition, a certain
In embodiment, at 116 abutment shoulder portion 128 of elastic pawl, dosage snap ring 104 is located furthest from the position of plunger rod proximal end,
The positioning groove 124 of dosage snap ring 104 still accommodates a part of the positioning protrusion 115 of plunger rod 102 at this time.In other words, In
In a certain embodiment, the axial distance of shoulders 128 to boss surface 123 is greater than elastic pawl 116 to the remote of positioning protrusion 115
The distance of side end.This set makes the positioning groove 124 of dosage snap ring 104 that can accommodate the positioning of plunger rod 102 always
A part of protrusion 115, without making positioning groove 124 be detached from positioning protrusion 115.
With continued reference to Fig. 3 a and 3b, dosage snap ring 104 further includes the safety groove 125 for being set to its inner surface, and safety is recessed
Slot 125 is staggered in the circumferential direction of inner surface with positioning groove 124, and is configured to allow for positioning protrusion 115 axially therein
Sliding.In a certain embodiment, the positioning protrusion 115 of plunger rod 102 is flexible, and is determined when positioning protrusion 115 is located at
Position groove 124 in when, can by relative to plunger rod 102 rotational positioning snap ring 104 and make positioning protrusion 115 that elasticity occur
Deformation and be detached from positioning groove 124 and be moved in safety groove 125.
As shown in figure 4, the boss surface 123 of dosage snap ring 104 abuts the shoulder surface 114 of plunger rod 102 and positions
Protrusion 115 is located in positioning groove 124, it will be understood that dosage snap ring 104 cannot be further towards the close of plunger rod 102 at this time
End movement, alternatively plunger rod 102 cannot be mobile further towards distal direction.When dose snap ring 104 makes to position
When protrusion 115 is joined in safety groove 125, then the boss surface 123 of dosage snap ring 104 no longer abuts the shoulder of plunger rod 102
Portion surface 114, so that acceptable dose snap ring 104 continues proximally to move axially a distance D (as schemed relative to plunger rod 102
Shown in 4) or plunger rod 102 towards distal direction move distance D, until the first end face 121 of dosage snap ring 104 is supported
Connect the shoulder surface 114 of plunger rod 102.It is appreciated that distance D is equal to height H (such as Fig. 4 of metering boss 122 in the axial direction
It is shown).
Referring now to Fig. 5 a-5c, Fig. 5 a-5c respectively illustrates the perspective view, top view and main view of boost motor 200.Such as figure
Shown in 5a, the alar part 202 of the extension including main part 201 and from main part 201 to two sides of boost motor 200.Such as Fig. 5 a-
Shown in 5c, the main part 201 of boost motor 200 further comprises the first sheet body 204, the second sheet body 205 and connection first
The connection wall of body 204 and the second sheet body 205.First sheet body 204, the second sheet body 205 and connection wall limit groove 203, groove
203 can receive the flange 302 of syringe 300, so that boost motor 200 is mounted to syringe 300.In addition, the first sheet body 204 limits
First opening 206, the second sheet body 205 limit the second opening 207.With reference to Fig. 1 a and 1b, when boost motor 200 is mounted on syringe 300
When upper, the first sheet body 204 of main part 201 is located at the top of the flange 302 of syringe 300, and second of main part 201
Body 205 is located at the lower part of the flange 302 of syringe 300, and the canister portion of the 207 engagement syringe 300 of the second opening of the second sheet body 205
301。
Fig. 5 d shows cross-sectional view when plunger rod 102 is mounted in boost motor 200.As fig 5d, the first opening
206 shape and size are set as corresponding with the plunger rod 102 and allow plunger rod 102 in first opening 206
It slides axially.As previously mentioned, the cross section that four longitudinal ribs 117 are formed substantially is in cross from the cross section of plunger rod 102
Shape, and connection four longitudinal 117 outermost four endpoints of rib can form square.As fig 5d, the first opening 206
With generally square part, and the generally square part with connect four longitudinal ribs, 117 outermost four endpoints
The square (dotted portion) of formation is corresponding.This configuration can prevent plunger rod 102 relative to 206 circumferential turns of the first opening
It is dynamic.As fig 5d, when plunger rod 102 first opening 206 in slide axially when, first opening 206 it is generally square
Part is matched with longitudinal rib 117 of plunger rod 102, to prevent plunger rod 102 from circumferentially rotating.It is appreciated that longitudinal rib 117
Quantity can be more or less than four, and connect the outermost endpoint of longitudinal rib 117 and be formed by shape and be also possible to grow
Rectangular or other polygons (for example, triangle, pentagon or hexagon etc.).Correspondingly, those skilled in the art can adjust
The shape and size of whole first opening 206 allow it to match with the concrete configuration of longitudinal rib 117, to prevent plunger rod
102 rotate in a circumferential direction.
As shown in Fig. 2, plunger rod 102 further includes bar shoulder 118, and bar shoulder 118 is along 102 axis of plunger rod in a certain embodiment
To projection be circular, and the projection of longitudinal rib 117 is substantially surrounded in the projection.Fig. 5 e shows plunger rod 102 and is mounted on
Cross-sectional view when in boost motor 200, it illustrates bar shoulders 118.The axis projection of bar shoulder 118 some be located at first opening
The outside of 206 axis projection, when plunger rod 102 slides in the first opening 206, this makes bar shoulder 118 can not be by the
One opening 206.
As seen in figure la and lb, when assembling syringe 10, first assisted quantitative device 100 is inserted into syringe 300, directly
It is located inside syringe to bar shoulder 118, the mounting groove 203 of boost motor 200 is then engaged into the flange 302 of syringe 300 to complete again
Assembling.It, can not be by the of boost motor 200 due to being located at bar shoulder 118 inside syringe 300 it is appreciated that after finishing assembly
One opening 206, so plunger rod 102 can not be pulled out syringe 300.The setting of bar shoulder 118 can be prevented due to operator
Maloperation and proximally excessive pull plunger rod 102, and then can prevent the maloperation due to operator from making plunger rod 102
It is detached from syringe 300.
Fig. 6 and 7 respectively illustrates the schematic diagram of plunger rod 502 and dosage snap ring 504 according to another embodiment of the application.
The dosage snap ring 104 of plunger rod 102 and Fig. 3 a-3b compared to Fig. 2, similar structure is by similar appended drawing reference in Fig. 6 and 7
It indicates.For sake of simplicity, only describing the area of plunger rod 502 and dosage snap ring 504 and plunger rod 102 and dosage snap ring 104 herein
Not.
As shown in fig. 6, positioning protrusion 515 has width D 1 in the axial direction, and its proximal end does not extend to shoulder surface
514, but with 514 distance D2 of shoulder surface.
As shown in fig. 7, dosage snap ring 504 further includes displacement grove 529, displacement grove 529 is substantially along dosage snap ring 504
Circumferentially extending, and there is width W1 in the axial direction, wherein the proximal side Yu boss surface 523 of displacement grove 529 are in axial direction
Upper W2 apart.
In a certain embodiment, D1 is substantially equal to or is slightly less than W1, and D2 is approximately equal to or slightly larger than W2, so that working as agent
When measuring the shoulder surface 514 of the abutting plunger rod 502 of boss surface 523 of snap ring 504, dose snap ring 504 can be passed through
So that positioning protrusion 515 enters in displacement grove 529 and is finally displaced to safety groove 525.At this point, as previously mentioned, dosage card
The boss surface 523 of ring 504 no longer abuts the shoulder surface 514 of plunger rod 502, and dosage snap ring 504 can be relative to column
Stopper rod 502 proximally moves axially a distance D, until the first end face 521 of dosage snap ring 504 abuts the shoulder of plunger rod 502
Portion surface 514.It is appreciated that distance D is equal to the height H (as shown in Figure 4) of metering boss 122 in the axial direction.
Fig. 8 a, 8b and 8c respectively illustrate the syringe 10 in different use states.As shown in Figure 8 a, Fig. 8 a is shown
The syringe 10 of assembling, and the syringe of syringe 10 is provided with liquid, which can be pre-filled liquid, can also be with
It is the liquid extracted on the spot by operator.It is located at determining for dosage snap ring 104 in the positioning protrusion 115 of Fig. 8 a, plunger rod 102
In the groove 124 of position, and the elastic pawl 166 of plunger rod 102 abuts the shoulders 128 of dosage snap ring 104.When relative to needle
When the axial promotion plunger rod 102 of cylinder 300 is to carry out emptying operation to syringe 300, plunger rod 102 is gradually mobile to distal end, until
Plunger (the i.e. second end face 129 of dosage snap ring 104 first sheet body that abuts boost motor 200 until 102 can not be pushed again
204, and the boss surface 123 of dosage snap ring 104 abuts the shoulder surface 114 of plunger rod 102), syringe 10 enters at this time
The state of Fig. 8 b.
In Fig. 8 b, the second end face 129 of dosage snap ring 104 abuts the first sheet body 204 of boost motor 200, and dosage card
The boss surface 123 of ring 104 abuts the shoulder surface 114 of plunger rod 102.In dose snap ring 104 so that plunger rod
After 102 positioning protrusion 115 is located in the safety groove 125 of dosage snap ring 104, it can continue axially to push away relative to syringe 300
Plunger rod 102 is moved to carry out injection operation, syringe 10 enters the state of Fig. 8 c at this time.
In Fig. 8 c, the first end face 121 of dosage snap ring 104 abuts the shoulder surface 114 of plunger rod 102, dosage snap ring 104
Second end face 129 still abut the first sheet body 204 of boost motor 200.It is appreciated that the plunger compared with Fig. 8 b, in Fig. 8 c
Bar 102 continues to advance distance D again relative to syringe 300, and distance D is equal to the axial direction of the metering boss 122 of dosage snap ring 104
Height H.Since plunger rod 102 accurately advances distance D between Fig. 8 b and Fig. 8 c, above-mentioned injection operation being capable of essence
The liquid for really injecting predetermined dose, detects by an unaided eye and is calibrated without operator.
Although the present invention is described in detail by reference to certain preferred embodiments, at described one of the invention
Or there are variations and modifications in the scope and spirit of multiple independent aspects.
Claims (18)
1. a kind of assisted quantitative device for syringe, which is characterized in that the assisted quantitative device includes:
With plunger rod proximally and distally；And
The dosage snap ring that is sheathed on the plunger rod periphery and can be moved axially along the plunger rod；
Wherein the dosage snap ring is configured to rotate in a circumferential direction from first position to the second position relative to the plunger rod；
Wherein when the dosage snap ring rotates in a circumferential direction from the first position to the second position, the plunger rod being capable of edge
Axial direction distally moves a distance relative to the dosage snap ring.
2. assisted quantitative device according to claim 1, which is characterized in that wherein
The plunger rod includes the shoulder positioned at the plunger rod proximal end, and the shoulder has positioned at the distal side of the shoulder
Shoulder surface；
The dosage snap ring include positioned at dosage snap ring proximal lateral first end face and along axial direction from the first end face to
Proximal lateral metering boss outstanding, the metering boss includes boss surface；
Wherein when the dosage snap ring is located at the first position, the shoulder surface abuts the boss surface；And work as
When the dosage snap ring is located at the second position, the shoulder surface abuts the first end face.
3. assisted quantitative device according to claim 2, which is characterized in that wherein
The plunger rod further includes the positioning protrusion axially extended in the distal side of the shoulder；
The dosage snap ring further include:
The positioning groove of the dosage snap ring inner surface is set, and the positioning groove is configured to allow for the positioning protrusion at it
Middle sliding；And
The safety groove of the dosage snap ring inner surface is set, and the safety groove is configured to allow for the positioning protrusion at it
Middle sliding；Wherein when the dosage snap ring is located at the first position, the positioning protrusion is located in the positioning groove, when
When the dosage snap ring is located at the second position, the positioning protrusion is located in the safety groove, and works as the plunger
When bar rotates in a circumferential direction from the first position to the second position, the positioning protrusion is detached from the positioning groove and is moved to
In the safety groove.
4. assisted quantitative device according to claim 3, which is characterized in that the shoulder is with the positioning protrusion described
It is substantially aligned in the axial direction of plunger rod.
5. assisted quantitative device according to claim 3, which is characterized in that the plunger rod includes along the plunger rod
Circumferentially spaced multiple positioning protrusion are accordingly equipped with multiple positioning grooves on the dosage snap ring.
6. assisted quantitative device according to claim 3, which is characterized in that the positioning protrusion is made of elastic material,
When rotating the dosage snap ring relative to the plunger rod, the positioning protrusion can occur flexible deformation and be detached from the positioning
Groove is simultaneously moved in the safety groove.
7. assisted quantitative device according to claim 3, which is characterized in that the dosage snap ring further includes that connection is described fixed
The displacement grove of position groove and safety groove, wherein the displacement grove is configured to when in the boss surface abutting shoulder
The positioning protrusion can be made recessed from the positioning when rotating the dosage snap ring relative to the plunger rod in the state of surface
Slot is moved in the safety groove along the displacement grove.
8. the assisted quantitative device according to any one of 1-7 in claim, which is characterized in that the plunger rod further includes
For limiting the dosage snap ring relative to the plunger rod to distally locating part in axial sliding, and in the dosage snap ring
Surface is equipped with the positioning engaging portion that can be engaged with the locating part.
9. assisted quantitative device according to claim 8, which is characterized in that the locating part is from the plunger rod periphery
The outwardly directed elastic pawl in surface, the positioning engaging portion are the shoulders that the dosage snap ring inner surface distal end is arranged in.
10. assisted quantitative device according to claim 9, which is characterized in that the locating part includes multiple elastic pawls,
When the dosage snap ring and axially opposed sliding are inserted into the distal end of the plunger rod, the elastic pawl can be elastically compressed
And pass through the proximal end of the dosage snap ring.
11. a kind of syringe, which is characterized in that the syringe includes:
Syringe；
The plunger being slidably disposed in the syringe；And
Assisted quantitative device according to claim 1 to 10.
12. syringe according to claim 11, which is characterized in that the plunger rod further includes remote positioned at the plunger rod
The columnar projections at end, and the plunger includes centre bore, wherein the columnar projections can be inserted into the centre bore, and institute
The height for stating columnar projections is greater than the height of the syringe plunger.
13. syringe according to claim 11, which is characterized in that the syringe further include:
For engaging the boost motor of the proximal rim of the syringe, the boost motor includes the first sheet body, the second sheet body and connection
The connection wall of first sheet body and the second sheet body, first sheet body, the second sheet body and connection wall restriction can receive the needle
The fixing groove of the proximal rim of cylinder, wherein first sheet body limits the first opening, second sheet body limits the second opening, institute
The shape and size for stating the first opening are set as that the plunger rod is allowed to slide axially in first opening.
14. syringe according to claim 13, which is characterized in that the plunger rod includes a plurality of vertical of radial arrangement
To rib, from the cross section of the plunger rod, the outermost for connecting a plurality of longitudinal rib can form polygon, and described first
The shape of opening is corresponding with the polygon with size, and the plunger rod is thus prevented circumferentially to turn relative to the boost motor
It is dynamic.
15. syringe according to claim 14, which is characterized in that the plunger rod includes four longitudinal ribs, from described
It is seen on the cross section of plunger rod, the outermost for connecting described four longitudinal ribs can form square, wherein the first opening packet
Include generally square part corresponding with the square.
16. syringe according to claim 14 or 15, which is characterized in that the plunger rod further includes positioned at distally and close
Bar shoulder between end, the bar shoulder along the plunger lever shaft at least part projection be located at it is described first opening projection
Outside, so that the bar shoulder can not be open by described first.
17. syringe according to claim 16, which is characterized in that the bar shoulder along the plunger lever shaft to projection
It is circular, and the circular at least part is located on the outside of the projection of first opening.
18. syringe according to claim 13, which is characterized in that the boost motor further includes alar part, the alar part from
First sheet body or the second sheet body extend radially outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821629551.4U CN209630354U (en) | 2018-10-08 | 2018-10-08 | Syringe and assisted quantitative device for syringe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821629551.4U CN209630354U (en) | 2018-10-08 | 2018-10-08 | Syringe and assisted quantitative device for syringe |
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| CN209630354U true CN209630354U (en) | 2019-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109172952A (en) * | 2018-10-08 | 2019-01-11 | 东曜药业有限公司 | Syringe and assisted quantitative device for syringe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109172952A (en) * | 2018-10-08 | 2019-01-11 | 东曜药业有限公司 | Syringe and assisted quantitative device for syringe |
| CN109172952B (en) * | 2018-10-08 | 2023-09-26 | 东曜药业有限公司 | Syringe and auxiliary dosing device for a syringe |
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