CN110448767A - A kind of fit structure and a kind of injection needle of needle stand and sheath - Google Patents
A kind of fit structure and a kind of injection needle of needle stand and sheath Download PDFInfo
- Publication number
- CN110448767A CN110448767A CN201810426152.6A CN201810426152A CN110448767A CN 110448767 A CN110448767 A CN 110448767A CN 201810426152 A CN201810426152 A CN 201810426152A CN 110448767 A CN110448767 A CN 110448767A
- Authority
- CN
- China
- Prior art keywords
- sheath
- needle stand
- needle
- elastic card
- card claw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 21
- 239000007924 injection Substances 0.000 title claims abstract description 21
- 210000000078 claw Anatomy 0.000 claims abstract description 57
- 239000011159 matrix material Substances 0.000 claims abstract description 23
- 239000008280 blood Substances 0.000 description 38
- 210000004369 blood Anatomy 0.000 description 38
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010241 blood sampling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150541—Breakable protectors, e.g. caps, shields or sleeves, i.e. protectors separated destructively, e.g. by breaking a connecting area
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150633—Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
Abstract
The present invention relates to the fit structures and a kind of injection needle of a kind of needle stand and sheath, wherein, the needle stand includes matrix, it is equipped with flange on the matrix, on side of the flange surface to matrix upper end, multiple elastic card claws are being equipped with close to outer circumference, the free end of the elastic card claw is slightly tilted towards the direction far from needle stand axis, groove is equipped in the inner wall of the sheath, wherein, when fitting together the needle stand and the sheath, the elastic card claw can be joined in corresponding groove to prevent from being axially disengaging between needle stand and sheath.
Description
Technical field
The present invention relates to the fit structures and a kind of injection needle of a kind of needle stand and sheath.
Background technique
Injection needle needle stand and sheath pass through interference fit connection in the prior art, wherein construct on the inner wall of sheath
The block machine of protrusion, when fitting together needle stand and sheath, the recessed portion in the block machine and needle stand is interference fitted.
When extracting injection needle from sheath, injection needle can encounter the block machine on the inner wall of sheath, thus may make needle
The burr of barb is damaged and generated to point, will increase the pain of patient when by such injection pin puncture muscle.
Summary of the invention
On this basis, it is an object of the present invention to provide the fit structures of a kind of needle stand and sheath, in the fit structure
The block machine on the inner wall of sheath in the prior art is eliminated, encounters needle in block machine so as to avoid when from needle is extracted in sheath
Cause to damage the risk of needle point, to can reduce the pain of patient when in use.
Above-mentioned purpose is realized by the fit structure of needle stand according to the present invention and sheath, wherein the needle stand includes base
Body is equipped with flange on the matrix, on side of the flange surface to matrix upper end, is being equipped with multiple elasticity close to outer circumference
The free end of claw, the elastic card claw is slightly tilted towards the direction far from needle stand axis, is equipped in the inner wall of the sheath
Groove, wherein when fitting together the needle stand and the sheath, the elastic card claw can be joined in corresponding groove
To prevent from being axially disengaging between needle stand and sheath.
According to the present invention, by the way that elastic card claw is arranged on needle stand and groove is arranged in the inner wall of sheath, so that
When sheath and needle stand are assembled, elastic card claw is engageable into corresponding groove.Good secure fit is thus provided,
That is, making sheath and needle stand be fixed to one another along axial direction and circumferentially be fixed to one another, so that in an assembling process will not be due to assembling
Machine vibration and make needle stand and sheaths separate.Cause needle stand and sheath de- prevented also from due to the vibration in transport simultaneously
It opens.Due to the setting of elastic card claw, so that when extracting needle stand from needle guard, elastic card claw deformation, to easily extract needle stand.
In a preferred embodiment, the multiple elastic card claw is the elastic card claw of two diametrically contrapositions.Thus can make
Engagement between needle stand and sheath is more firm.
In a preferred embodiment, the quantity of the quantity of the groove in the inner wall of the sheath and the elastic card claw
It is identical, and the circumferential width of groove and the circumferential width of elastic card claw match, preferred gap cooperation.
In a preferred embodiment, the groove in the inner wall of the sheath is arranged with circumferentially surrounding.
In a preferred embodiment, on the needle stand, in being arranged on the side of matrix upper end for the flange
There are at least two ribs.
In a preferred embodiment, at least two ribs are arranged with being circumferentially staggered with the elastic card claw.
In a preferred embodiment, in the inner wall of the sheath be equipped at least two tread plates, described at least two
Tread plate extends in the longitudinal direction and circumferentially separated from one another respectively, forms recess portion between adjacent tread plate, by institute
It states needle stand and when the sheath fits together, at least two ribs can be respectively received in the recess portion.
In a preferred embodiment, the tread plate is since sheath open end in a longitudinal direction towards sheath closure end
Extend.
In a preferred embodiment, the tread plate since the side of the separate sheath open end of the groove along
Longitudinal direction extends towards sheath closure end.
In a preferred embodiment, the outer seamed edge of the free end of the elastic card claw is through rounding or chamfered edge.It is fallen by this
Round or chamfered edge can be such that elastic card claw more easily enters in groove when assembling needle stand and sheath.
In a preferred embodiment, the outer seamed edge of the free end of the rib is through rounding.
In a preferred embodiment, the elastic card claw is bonded in the groove by clearance fit.So that
The joint of needle stand and sheath will not deform during high temperature or long-term storage.
In a preferred embodiment, the elastic card claw is made of plastics.Thus elastic card claw can be deformed flexibly, thus
When separating needle stand and sheath, needle stand can be extracted in the case where no shake, protection needle point is not damaged.
The invention further relates to a kind of injection needle, which includes the fit structure of needle stand and sheath recited above.It should
Injection needle apparatus has all advantages of the fit structure of the needle stand and sheath.
Detailed description of the invention
Below according to attached drawing the present invention is described in detail.
Fig. 1 shows the needle stand of injection needle according to prior art；
Fig. 2 shows the sheaths according to prior art with the cooperation of the needle stand of injection needle, also show phase in the sheath
The syringe needle answered；
Fig. 3 shows the view after the assembling of the sheath in needle stand and Fig. 2 in Fig. 1；
Fig. 4 schematically illustrates a kind of embodiment of needle stand according to the present invention, wherein needle is inserted on needle stand
Head；
Fig. 5 show the needle stand in Fig. 4 along the axial direction of syringe needle be rotated by 90 ° after view；
Fig. 6 shows the enlarged drawing of the needle stand in Fig. 4, wherein does not have syringe needle on needle stand；
Fig. 7 shows the longitudinal sectional drawing of the needle stand in Fig. 6；
Fig. 8 shows the top view of the needle stand in Fig. 6；
Fig. 9 shows the perspective view of the needle stand in Fig. 6；
Figure 10 shows the sheath with the needle stand cooperation in Fig. 4；
Figure 11 A shows a kind of variant schemes of sheath in Figure 10；
Figure 11 B shows the enlarged drawing of the cross section along cutting line C-C in Figure 11 A；
Figure 12 shows the view after the assembling of the sheath in needle stand and Figure 10 in Fig. 4；
Figure 13 schematically illustrates the another embodiment of needle stand according to the present invention；
Figure 14 shows the sheath with the needle stand cooperation in Figure 13；
Figure 15 shows the view after the assembling of the sheath in needle stand and Figure 14 in Figure 13.
Specific embodiment
It should be appreciated by those skilled in the art that the needle stand of the application and the fit structure of sheath are not limited to cited injection
Device also can be applied to other similar medical instrument.The directional terminology of middle appearance described in detail below, such as "front", "rear",
"left", "right", "upper", "lower" etc. be needle point is upward when hand syringes, syringe downwards shown in for direction.
Fig. 1 to Fig. 3 shows injection needle needle stand according to prior art and the sheath with injection needle needle stand cooperation.
It can be seen from figure 1 that there are two sections for the tool of needle stand 1, that is, needle stand top section 11 and needle stand compresses lower section 12.Needle
Seat compresses lower section 12 is constructed substantially into hollow cylinder and has flange on the end far from needle stand top section 11.Under needle stand
Portion's section 12 with syringe (being not shown) herein for connecting.Needle stand top section 11 is similarly configured to cylindrical and has than needle stand
The smaller cross section of compresses lower section 12.Needle stand compresses lower section 12 and needle stand top section 11 for example can be single structure, In
This needle stand compresses lower section 12 is transitioned into needle stand top section 11 in the ends taper close to needle stand top section 11.Needle
Seat top section 11 has longitudinal center through hole fixedly to accommodate needle 3.Longitudinal center through hole has longitudinal axis, this is vertical
Axis is also the longitudinal axis L 1 of needle stand 1.
As can be seen from Figure 2, sheath 1 is elongated, and the top of sheath is closed and its bottom end is open.From sheath
Top to bottom end is gradually increased substantially taperedly.The cross section of sheath 2 is substantially circular and has longitudinal axis L 2.It is inserted by needle
When entering in sheath, the axis coaxle of the longitudinal axis L 2 and syringe needle.The direction of sheath longitudinally L2 is divided into two sections, that is, shield
Cover top section 21 and sheath compresses lower section 22.When sheath top section 21 is used in the needle stand insertion sheath that will be fixed with needle
Needle is accommodated, and sheath compresses lower section 22 is used to engage with needle stand 1, so that sheath 2 is releasably retained on needle stand 1.
Fig. 3 shows sheath 2 and the assembled state of needle stand 1.In order to realize that sheath 2 is engaged with needle stand 1, in needle stand 1
In needle stand compresses lower section 12 to the height of the transition part of needle stand top section 11, a circle recess is constructed on the outer peripheral surface of needle stand 1
Portion.And at the close sheath top section 21 of the sheath compresses lower section 22 of sheath 2, in the sheath compresses lower section 22 of sheath 2
One circle protruding portion of construction on inner peripheral surface, so that the protruding portion on the inner peripheral surface of sheath 2 is engageable when needle stand to be inserted into sheath
In recessed portion on to needle stand 1, so that sheath is fixed on needle stand.
Due to the protruding portion on the inner peripheral surface of sheath compresses lower section 22, will cause when extracting injection needle from sheath
The needle point of injection needle meets the protruding portion, to generate the burr of barb on needle point, thereby results in increasing when needle point punctures muscle
Add feeling of pain.
Fig. 4 schematically illustrates a kind of embodiment of needle stand according to the present invention,
Fig. 5 shows view of the needle stand in Fig. 4 after 90 ° of the rotation of needle stand axis.In this embodiment, the needle stand
It is configured to blood taking needle needle stand 4.Here, blood taking needle needle stand 4 has matrix 40, matrix has center through hole along longitudinal direction, and needle 3 can be along vertical
It is inserted and fixed into wherein to the through-hole is passed through.In figures 4 and 5, needle 3 has been fixed in the center through hole of needle stand.
It can be seen that from Fig. 6, Fig. 7 and Fig. 9, flange 41 be configured on the matrix, the upper end interval of the flange and matrix
It arranges with opening.It is configured with threaded connection 42 on the side of flange 41 deviated from matrix upper end, which is used for
It is connect with needle holder (not shown).As can be seen from Figure 5, in flange 41 on the side of matrix upper end, in leaning on for flange
Nearly outer circumference is axially configured with elastic card claw 43 along needle stand.The free end of elastic card claw 43 radially outside direction slightly incline
Tiltedly extend, this can also find out from Fig. 6, Fig. 7 and Fig. 8.
Here, elastic card claw is for example made of plastics.Preferably, elastic card claw and matrix construction are integral.
There are two elastic card claws for construction in this embodiment.Two elastic card claws 43 are relatively diametrically arranged in convex with setting
On edge 41.More can certainly be set.In addition, along circumferential direction at interval with elastic card claw 43, in the face of flange 41
To rib 44 is configured on the side of matrix upper end, rib extends along needle stand axis L1 and radially in inner radial and base
Body 40 is fixedly connected.Here, rib can play booster action.It can be clearly seen that rib 44 from Fig. 4, in this embodiment
Four ribs are configured with, four ribs are arranged on 41 upper side of flange with 90 ° of angle with being staggered each other.It can certainly set
Set two or more ribs, it is preferable that rib is symmetrically arranged and arranges with being circumferentially staggered with elastic card claw, preferably
Circumferentially it is arranged with a gap with elastic card claw band.Preferably, the longitudinal direction of rib extends greater than the longitudinal of elastic card claw and extends.
Figure 10 shows the blood taking needle sheath 5 with the blood taking needle needle stand cooperation in Fig. 4.The blood taking needle sheath 5 is identically constructed
At elongated, and the top of blood taking needle sheath is closed and its bottom end is open.The base from the top of blood taking needle sheath to bottom end
This is gradually increased taperedly.The cross section of blood taking needle sheath 5 is substantially circular and has longitudinal axis L 2.In blood taking needle sheath
At the bottom end opening, fluted 51 are constructed on the inner peripheral surface of blood taking needle sheath, so that by blood taking needle sheath and blood taking needle
Elastic card claw when needle stand is installed together on blood taking needle needle stand is engageable into groove, so that blood taking needle sheath and blood taking needle needle
Seat axially opposed can not move each other.Injection needle is protected from there through blood taking needle sheath.
Preferably, multiple grooves are constructed along circumferential direction on the inner peripheral surface of blood taking needle sheath, as long as protecting by blood taking needle
Elastic card claw when set is installed together with blood taking needle needle stand on blood taking needle needle stand is engageable into corresponding groove.Preferably,
The quantity of groove and the quantity of elastic card claw are equal, and the circumferential width of groove and the circumferential width of elastic card claw match, excellent
Select clearance fit.Preferably, the quantity of groove is greater than the quantity of elastic card claw.Preferably, on the inner peripheral surface of blood taking needle sheath
Around one circle groove of construction.Here, making elastic card claw be joined to corresponding groove by when assembling sheath and needle stand
In, thus provide good secure fit, that is, so that sheath and needle stand is fixed to one another along axial direction and is circumferentially fixed to one another,
So that in an assembling process needle stand and sheaths separate will not be made due to assembling machine vibration.Simultaneously prevented also from due to transporting
When vibration and cause needle stand and sheath to disengage.
Preferably, elastic card claw is engaged in a groove by clearance fit, so that entire needle stand and sheath product are in high temperature
Or it will not deform during long-term storage.
Preferably, the outer seamed edge of the free end of elastic card claw is configured to chamfered edge or rounding, in order in assembling sheath and
It is deformed inward elastic card claw by chamfered edge or rounding when needle stand, to easily be caught in groove.
In addition, tread plate 52 is configured in the inner peripheral surface of blood taking needle sheath 9 from being also seen that in Figure 10, corresponding two
Recess portion is formed between a adjacent tread plate along circumferential direction, tread plate is since the open end of blood taking needle sheath along blood taking needle
The direction on the direction of the longitudinal axis of sheath towards the closed top of blood taking needle sheath extends such distance, so that protecting in blood taking needle
Rib when set and blood taking needle needle stand fit together on blood taking needle needle stand is engageable between the tread plate 52 of blood taking needle sheath 9
Recess portion in.The quantity of the rib on blood taking needle needle stand can be greater than in the quantity of the tread plate 52 on blood taking needle sheath 9.It is described
The circumferential width of recess portion is greater than the circumferential width of rib, consequently facilitating the insertion of needle stand.
Figure 11 A shows a kind of variant schemes of the sheath in Figure 10；Figure 11 B show in Figure 11 A along cutting line
The cross section of C-C, from the recess portion that can be seen that in Figure 11 B between tread plate 52 and adjacent tread plate.Become shown in Figure 11 A
For type scheme unlike the embodiment of Figure 10, tread plate is not since the open end of blood taking needle sheath but from sheath
In for the side of the separate open end of the groove of elastic card claw start the direction along the longitudinal axis of blood taking needle sheath towards blood sampling
The direction on the closed top of needle shield extends.
Preferably, the rib on needle stand is also configured to thus may be used through rounding outside the top that it is located in Fig. 6 at seamed edge
When assembling sheath and needle stand, easily slide into rib in the recess portion between tread plate.
Figure 12 shows the view after the assembling of the sheath in needle stand and Figure 10 in Fig. 4.When installing blood taking needle, group first
Sheath and needle stand are filled, sheath is then held, so that the threaded connection on needle stand is connect with needle holder.Here, by taking a blood sample
The cooperation of tread plate 52 and the rib on blood taking needle needle stand on needle shield 5, so that the screw-in of threaded connection 42 is held needle
When in device, prevent needle stand from rotating relative to sheath, to easily install needle holder.
Figure 13 schematically illustrates the another embodiment of needle stand according to the present invention.In this embodiment, root
Safty pin needle stand is implemented as according to needle stand of the invention.Safty pin needle stand 6 has matrix 60, entreats to be equipped with along longitudinal direction in the base and run through
Hole, during needle 3 can be inserted and fixed into longitudinally through the through hole.
The identically constructed flexible claw 63 on matrix.There are two elastic card claws for construction in this embodiment.It certainly can also
More elastic card claws are arranged.Two elastic card claws 63 are relatively diametrically arranged on matrix with setting.Elastic card claw 63
Free end radially outside direction slightly askew extend.
Figure 14 shows the safe needle shield with the needle stand cooperation in Figure 13.In the close bottom end opening of safe needle shield
Place, constructs fluted 71 on the inner peripheral surface of blood taking needle sheath, so that safe needle shield and safty pin needle stand are mounted on one
Elastic card claw when rising on safty pin needle stand is engageable into groove 71, so that safe needle shield and safty pin needle stand can not be along axis
To moving relative to each other.From there through safe needle shield injection needle can be protected in safty pin transportational process and before use.
Once safty pin has used, rocker arm 72 can cover needle, to avoid medical staff or other staff are accidentally injured.
The construction of blood taking needle sheath in the construction and Figure 10 of safe needle shield 7 in Figure 14 is essentially identical.Difference
It is, without construction tread plate on the inner wall of the safe needle shield in Figure 14.Due to the side installation on safty pin needle stand
There is rocker arm 72, rocker arm is fixedly connected with needle stand.Therefore, by needle stand when being installed on syringe with the side that sheath deviates from,
It can be installed by grasping rocker arm, therefore, the tread plate in sheath can be omitted at this.
In addition, be configured with flange on the matrix 60 of safty pin needle stand 6 in this embodiment, along circumferential direction with elastic card
Pawl 63 is configured with rib 64 at interval, in flange on the side of matrix upper end, and rib extends along needle stand axis.In
This, rib can play booster action.It is configured with four ribs in this embodiment, four ribs are wrong with 90 ° of angle each other
It is arranged in opening on flange upper side.Two or more ribs can certainly be set, it is preferable that rib is symmetrically arranged simultaneously
And arrange with being circumferentially staggered with elastic card claw, preferably circumferential it is arranged with a gap with elastic card claw band.
In the case where not having tread plate in sheath, rib 64 can interact with jacket inner wall, such as be connected by power transmission
Interaction is connect, so that sheath circumferentially will not shake or swing opposite to each other with needle stand.
But tread plate can also be set in sheath in other implementations.
Figure 15 shows the view after the assembling of the sheath in needle stand and Figure 14 in Figure 13.
Preferred forms of the invention have been described in detail above by reference to attached drawing.It should be appreciated by those skilled in the art that attached
Figure and its corresponding description are just to explain the purpose of the present invention, and on this basis, those skilled in the art can make other
Modification, replacement or improvement.These modifications, replacement or improvement fall into protection scope of the present invention.
Claims (9)
1. the fit structure of a kind of needle stand and sheath, which is characterized in that the needle stand includes matrix, is equipped on the matrix convex
Edge, on side of the flange surface to matrix upper end, close to outer circumference be equipped with multiple elastic card claws, the elastic card claw from
It is slightly tilted by holding towards far from the direction of needle stand axis, groove is equipped in the inner wall of the sheath, wherein by the needle stand
When fitting together with the sheath, the elastic card claw can be joined in corresponding groove to prevent axis between needle stand and sheath
To disengaging.
2. the fit structure of needle stand according to claim 1 and sheath, which is characterized in that the multiple elastic card claw is two
The elastic card claw of a diametrically contraposition.
3. the fit structure of needle stand according to claim 1 and sheath, which is characterized in that in the inner wall of the sheath
The quantity of groove is identical as the quantity of the elastic card claw, and the circumferential width of the circumferential width of groove and elastic card claw
Match.
4. the fit structure of needle stand according to claim 1 and sheath, which is characterized in that in the inner wall of the sheath
Groove is arranged with circumferentially surrounding.
5. the fit structure of needle stand according to claim 1 and sheath, which is characterized in that on the needle stand, described
Flange is disposed at least two ribs on the side of matrix upper end.
6. the fit structure of needle stand according to claim 5 and sheath, which is characterized in that at least two ribs and the institute
Elastic card claw is stated to arrange with being circumferentially staggered.
7. the fit structure of needle stand according to claim 5 and sheath, which is characterized in that set in the inner wall of the sheath
There are at least two tread plates, at least two tread plates extend in the longitudinal direction and circumferentially separated from one another respectively, in phase
Recess portion is formed between adjacent tread plate, when fitting together the needle stand and the sheath, described at least two ribs can
It is respectively received in the recess portion.
8. the fit structure of needle stand according to claim 1 and sheath, which is characterized in that the free end of the elastic card claw
Outer seamed edge through rounding or chamfered edge.
9. a kind of injection needle, the injection needle includes the cooperation of needle stand and sheath according to any one of claim 1 to 8
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426152.6A CN110448767A (en) | 2018-05-07 | 2018-05-07 | A kind of fit structure and a kind of injection needle of needle stand and sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426152.6A CN110448767A (en) | 2018-05-07 | 2018-05-07 | A kind of fit structure and a kind of injection needle of needle stand and sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110448767A true CN110448767A (en) | 2019-11-15 |
Family
ID=68471762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810426152.6A Pending CN110448767A (en) | 2018-05-07 | 2018-05-07 | A kind of fit structure and a kind of injection needle of needle stand and sheath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110448767A (en) |
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| CN201492764U (en) * | 2009-06-30 | 2010-06-02 | 李慧慧 | Disposable needle tip automatic retraction safety syringe |
| CN202270231U (en) * | 2011-08-01 | 2012-06-13 | 上海萌黎国际贸易有限公司 | Needle head protecting device and safe needle component |
| CN103157157A (en) * | 2011-12-19 | 2013-06-19 | 陈道申 | Safe injector |
| CN209123086U (en) * | 2018-05-07 | 2019-07-19 | 上海萌黎国际贸易有限公司 | A kind of fit structure and a kind of injection needle of needle stand and sheath |
-
2018
- 2018-05-07 CN CN201810426152.6A patent/CN110448767A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201492764U (en) * | 2009-06-30 | 2010-06-02 | 李慧慧 | Disposable needle tip automatic retraction safety syringe |
| CN202270231U (en) * | 2011-08-01 | 2012-06-13 | 上海萌黎国际贸易有限公司 | Needle head protecting device and safe needle component |
| CN103157157A (en) * | 2011-12-19 | 2013-06-19 | 陈道申 | Safe injector |
| CN209123086U (en) * | 2018-05-07 | 2019-07-19 | 上海萌黎国际贸易有限公司 | A kind of fit structure and a kind of injection needle of needle stand and sheath |
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