CN209751665U - syringe and locking piece thereof - Google Patents
syringe and locking piece thereof Download PDFInfo
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- CN209751665U CN209751665U CN201920097506.7U CN201920097506U CN209751665U CN 209751665 U CN209751665 U CN 209751665U CN 201920097506 U CN201920097506 U CN 201920097506U CN 209751665 U CN209751665 U CN 209751665U
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- hole
- latch
- handle
- locking
- push rod
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Abstract
the embodiment of the utility model discloses syringe and lock piece thereof. A locking element for mounting on an injector, the injector comprising: the piston push rod is provided with a convex rib, the convex rib is provided with a clamping gap, and the piston head can move along the piston of the injection cavity; the locking piece is provided with a through hole, the inner diameter of the through hole is smaller than that of the socket, the locking piece is provided with a locking notch communicated with the through hole, and the locking notch is used for the protruding rib to pass through; the thickness of the locking piece is smaller than or equal to the width of the clamping notch, so that the piston push rod is allowed to be twisted at the locking piece through the clamping notch. The embodiment of the utility model provides an injector and lock piece thereof can realize the technological effect that prevents piston push rod back extension through the lock piece.
Description
Technical Field
The embodiment of the utility model provides a relate to medical instrument, especially relate to an injector and lock piece thereof.
Background
Syringes are a common medical device. Generally, the syringe comprises: the injection device comprises a needle cylinder and a piston push rod, wherein the needle cylinder is provided with a hollow injection cavity, the head end of the needle cylinder is provided with an injection hole, the injection cavity is communicated with the injection hole, an open socket is formed at the tail end of the needle cylinder by the injection cavity, and the tail end of the needle cylinder is provided with a handle; the head end of the piston push rod is provided with a piston head, the tail end of the piston push rod is provided with a handle, and the piston push rod is inserted into a socket at the tail end of the needle cylinder, so that the piston head can move along the piston of the injection cavity. When the device is used, the needle head is sleeved on the injection hole, the handle is used for drawing the piston push rod outwards to form negative pressure in the injection cavity, the needle head is used for taking materials, namely, liquid or gas required to be filled is extracted, the handle is propped against and the handle is pressed, so that the liquid or the gas in the injection cavity is injected into a target through the needle head.
the inventor of the application finds that when the injector in the prior art is used for extracting, the negative pressure can cause the piston push rod to extend back, so that the extracted dosage of the injector is influenced, and the use accuracy of the injector is reduced.
Therefore, how to design an injector capable of preventing the piston rod from extending back is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
the utility model aims to provide an injection syringe and locking piece that prevent piston push rod back extension.
The utility model provides a lock piece for install on the syringe, the syringe includes: the injection device comprises a needle cylinder and a piston push rod, wherein the needle cylinder is provided with a hollow injection cavity, the head end of the needle cylinder is provided with an injection hole, the injection cavity is communicated with the injection hole, an open socket is formed at the tail end of the needle cylinder in the injection cavity, the tail end of the needle cylinder is provided with a handle, a locking piece is specifically used for being installed at the handle, the head end of the piston push rod is provided with a piston head, the tail end of the piston push rod is provided with a handle, the piston push rod is provided with a convex rib, a clamping gap is formed in the convex rib, and the piston head can move along the piston;
The locking piece is provided with a through hole, the inner diameter of the through hole is smaller than that of the socket, the locking piece is provided with a locking notch communicated with the through hole, and the locking notch is used for the protruding rib to penetrate through;
The thickness of the locking piece is smaller than or equal to the width of the clamping gap, so that the piston push rod is allowed to be twisted at the locking piece through the clamping gap.
in one possible embodiment, the lock member includes: a left housing and a right housing;
The left shell is provided with a left half through hole, and the right shell is provided with a right half through hole;
the left shell and the right shell are detachably connected, and the left half through hole and the right half through hole form the through hole.
in a feasible scheme, the left shell is provided with a male connector, the right shell is provided with a female connector, and the male connector and the female connector are clamped to enable the left shell and the right shell to be detachably connected.
In one possible aspect, the male connector includes: the first clamping hook and the first clamping groove;
The female joint includes: the second clamping groove is matched with the first clamping hook, and the second clamping hook is matched with the first clamping groove.
In a feasible scheme, the bottom side of the locking piece is provided with an installation clamping groove, the shape of the installation clamping groove is matched with that of the handle, and the locking piece is clamped on the handle through the installation clamping groove.
In a feasible scheme, an adhesive tape is arranged in the mounting clamping groove, and the mounting clamping groove is bonded with the handle.
In one possible embodiment, the blocking element is made of a medical rubber material or a medical plastic material.
In one possible embodiment, the locking member and the handle are of a unitary construction.
the utility model also provides a syringe, include: the needle cylinder, the piston push rod and the locking piece in any one of the feasible schemes;
the locking piece is arranged on a handle at the tail end of the needle cylinder.
In a feasible scheme, the number of the convex ribs is four, and the four convex ribs are arranged on the piston push rod in a cross shape;
the number of locking breach is four, and the position and four the position of protruding muscle corresponds each other.
In one possible embodiment, the number of the engagement notches is multiple.
In one possible solution, the plurality of engaging notches are arranged at equal intervals.
In one possible embodiment, the latching recess is open at 60 °.
in one possible embodiment, the syringe further comprises: a plug;
the plug is used for hermetically covering the injection hole.
In a possible scheme, the plug is made of a medical rubber material or a medical plastic material.
The embodiment of the utility model provides an injector and lock piece thereof can realize the technological effect that prevents piston push rod back extension through the lock piece. For example, when the user pulls the piston rod outwards by using the handle, the piston head moves along the piston of the injection cavity, meanwhile, the convex rib on the piston rod moves along the locking notch, and when the clamping notch on the convex rib reaches the locking piece, the piston rod is twisted, so that the clamping notch is placed on the locking piece, and the back extension of the piston rod can be prevented.
drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
fig. 1 is a perspective exploded view of a syringe according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a syringe according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a locking member according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a piston rod according to a first embodiment of the present invention;
Fig. 5 is a schematic structural view of a piston rod according to a second embodiment of the present invention;
Fig. 6 is a schematic front three-dimensional structure view of a lock member according to a third embodiment of the present invention;
Fig. 7 is a schematic structural view of a back side of a locking member according to a third embodiment of the present invention;
Fig. 8 is a schematic structural diagram of a back side perspective of a left housing in a third embodiment of the present invention;
fig. 9 is a schematic front perspective structural view of a right housing in a third embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a locking member according to a fourth embodiment of the present invention;
FIG. 11 is a schematic rear perspective view of a locking member according to a fourth embodiment of the present invention;
The labels in the figure are:
A needle cylinder 1;
A handle 11;
A socket 12;
a piston push rod 2;
a convex rib 21;
A snap-fit notch 211;
A lock member 3;
A through hole 31;
a locking notch 32;
a plug 4;
A left housing 33;
A right housing 34;
A left half via 331;
the right half through hole 341;
A first hook 3321;
a first card slot 3322;
A card slot 35 is installed.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a perspective exploded view of an injector in the first embodiment of the present invention, fig. 2 is a schematic structural view of a cylinder in the first embodiment of the present invention, fig. 3 is a schematic structural view of a lock member in the first embodiment of the present invention, and fig. 4 is a schematic structural view of a piston rod in the first embodiment of the present invention.
as shown in fig. 1 to 4, the injector provided in this embodiment includes: a syringe 1, a piston pusher 2 and a locking member 3.
Wherein, cylinder 1 is equipped with hollow injection chamber, and the injection chamber is used for holding the liquid or the gas of extraction, and cylinder 1 is made by transparent material, and cylinder 1 is equipped with the scale mark that is used for instructing the extraction dosage in injection chamber department, and the head end of cylinder 1 is equipped with the injection hole, and the injection chamber communicates with the injection hole, and the injection chamber forms open socket 12 at the tail end of cylinder 1, and this socket 12 is circular socket, and the tail end of cylinder 1 is equipped with handle 11, and this handle 11 is two lamella fin forms, and sets up in the outside of cylinder 1 symmetrically.
Locking piece 3 is the slice, and this locking piece 3 is installed in handle 11 department, and this locking piece 3 is equipped with through-hole 31, and the internal diameter of through-hole 31 is less than the internal diameter of socket, and locking piece 3 is equipped with the locking breach 32 with through-hole 31 intercommunication. It should be noted that the locking member 3 can be fixedly mounted at the handle 11 by means of fastening, adhering, hinging, welding, etc., the connection manner between the locking member and the handle is not limited in this embodiment, and any means for achieving the fixed connection or detachable connection between the locking member and the handle should fall within the protection scope of the present application.
The head end of piston push rod 2 is equipped with the piston head, and the piston head is cylindrically to with injection chamber adaptation, the tail end of piston push rod 2 is equipped with the handle, the handle is circular handle, piston push rod 2 is equipped with protruding muscle 21, piston push rod 2 passes locking breach 32 through protruding muscle 21, so that the piston head can follow injection chamber piston motion, wherein, locking breach 32 can be rectangle breach, semilune breach, triangle-shaped breach etc. this embodiment does not do any restriction to the shape of locking breach. It is also worth noting that the diameter of the circular handle is smaller than the diameter of the through hole 31 so that the handle moves outwardly from the through hole 31.
meanwhile, the rib 21 in this embodiment is provided with a locking notch 211, and the width of the locking notch 211 is greater than or equal to the thickness of the locking member 3, so as to allow the piston rod 2 to be twisted at the locking member 3 through the locking notch 211. The engaging notch 211 may be a rectangular notch, a half-moon notch, a triangular notch, etc., and the shape of the locking notch is not limited in this embodiment.
As can be easily seen from the above, the injector provided in the present embodiment achieves the technical effect of preventing the piston rod 2 from extending back through the locking member 3. For example, when the user pulls the plunger rod 2 outwards by using the handle, the plunger head moves along the plunger of the injection cavity, and meanwhile, the rib 21 on the plunger rod 2 moves along the locking notch 32, when the engaging notch 211 on the rib 21 reaches the locking member 3, the plunger rod 2 is twisted to make the engaging notch 211 rest on the locking member 3, so that the retraction of the plunger rod 2 can be prevented.
optionally, in this embodiment, the number of the ribs 21 is a plurality of, specifically four, and four ribs 21 are arranged in a cross shape on the piston rod 2, and in cooperation with it, the number of the locking notches 211 is four and is located at the same axial position, or so to speak, the four locking notches 211 are located at the same ring position, the number of the locking notches 32 is four, and the positions of the locking notches correspond to the positions of the four ribs 21. The structure ensures that the piston push rod 2 cannot twist when being pulled and pulled, and improves the stability of the piston push rod 2 when being pulled and pulled.
Optionally, in this embodiment, the injector further includes: and the plug 4 is used for hermetically covering the injection hole. When the injector is used, the piston push rod can be pulled firstly to extract liquid or air with required dosage, and then the injection hole is sealed by the plug, so that the injector can keep a material storage state.
In addition, optionally, the plug 4 is made of medical rubber materials or medical plastic materials, so that the medical requirements are met, and the sealing effect on the injection hole is improved.
optionally, in this embodiment, the locking piece 3 is made of medical rubber material or medical plastic material, which not only can meet medical requirements, but also can relieve the requirement of size error when the locking piece and the handle are installed due to the elastic deformation capability of rubber.
Fig. 5 is the utility model discloses piston rod's in the embodiment two structural schematic diagram, the utility model provides a second embodiment's improvement scheme, its improvement lies in, and the block breach 211 in the embodiment one lies in same axial position, and in this embodiment, a plurality of block breach 211 are equidistant setting, equidistant setting be used for with the scale cooperation of injection chamber department to the dose is got in accurate control.
Alternatively, the engaging notch 211 in this embodiment is opened at 60 ° to facilitate twisting.
Fig. 6 is a schematic structural diagram of a front three-dimensional structure of a lock stopper in the third embodiment of the present invention, fig. 7 is a schematic structural diagram of a back three-dimensional structure of a lock stopper in the third embodiment of the present invention, fig. 8 is a schematic structural diagram of a back three-dimensional structure of a left housing in the third embodiment of the present invention, and fig. 9 is a schematic structural diagram of a front three-dimensional structure of a right housing in the third embodiment of the present invention, which is an alternative to the first embodiment of the present invention, and in the first embodiment of the present invention, the lock stopper can be a complete part, and in this embodiment, the lock stopper 3 includes: a left housing 33 and a right housing 34.
Specifically, the left housing 33 is provided with a left half through hole 331, the right housing 34 is provided with a right half through hole 341, the left housing 33 and the right housing 34 are detachably connected, and the left half through hole 331 and the right half through hole 341 form the through hole 31.
optionally, the left housing 33 is provided with a male connector, the right housing 34 is provided with a female connector, and the male connector and the female connector are engaged, so that the left housing 33 and the right housing 34 are detachably connected.
More specifically, the male connector includes: first pothook 3321 and first draw-in groove 3322, female joint includes: a second clamping groove matched with the first clamping hook 3321, and a second clamping hook matched with the first clamping groove 3322.
Optionally, in this embodiment, an installation clamping groove 35 is formed in a bottom side of the locking member 3, a shape of the installation clamping groove 35 is adapted to a shape of the handle 11, and the locking member 3 is clamped on the handle 11 through the installation clamping groove 35.
Optionally, in this embodiment, an adhesive is disposed in the mounting slot 35, and the mounting slot 35 is adhered to the handle 11.
The fourth embodiment of the present invention is an alternative to the first embodiment, and the difference lies in that the locking member of the first embodiment needs to be additionally installed on the handle, and the locking member 3 and the handle 11 in the first embodiment are integrated. It will be understood that the barrel is formed by injection moulding, wherein the mould used for injection moulding comprises the shape of the locking member, and the injection moulding process results in an integral structure of the barrel and the locking member.
The fourth embodiment of the present invention provides a lock block, the fourth embodiment is an alternative to the third embodiment, fig. 10 is the structural schematic diagram of the lock block in the fourth embodiment of the present invention, fig. 11 is the three-dimensional structural schematic diagram of the back of the lock block in the fourth embodiment of the present invention, as shown in fig. 10 and fig. 11, the difference between the third embodiment of the present invention and the fourth embodiment of the present invention is that the bottom side of the lock block in the present embodiment is equipped with the installation card slot 35, and the installation card slot has a circular opening, and its inner chamber is used for being sleeved on the handle of the needle cylinder.
In the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first feature or the second feature or indirectly contacting the first feature or the second feature through an intermediate.
Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. a locking element for mounting on an injector, the injector comprising: the injection device comprises a needle cylinder and a piston push rod, wherein the needle cylinder is provided with a hollow injection cavity, the head end of the needle cylinder is provided with an injection hole, the injection cavity is communicated with the injection hole, an open socket is formed at the tail end of the needle cylinder in the injection cavity, the tail end of the needle cylinder is provided with a handle, a locking piece is specifically used for being installed at the handle, the head end of the piston push rod is provided with a piston head, the tail end of the piston push rod is provided with a handle, the piston push rod is provided with a convex rib, a clamping gap is formed in the convex rib, and the piston head can move along the piston;
The locking piece is provided with a through hole, the inner diameter of the through hole is smaller than that of the socket, the locking piece is provided with a locking notch communicated with the through hole, and the locking notch is used for the protruding rib to penetrate through;
The thickness of the locking piece is smaller than or equal to the width of the clamping gap, so that the piston push rod is allowed to be twisted at the locking piece through the clamping gap.
2. The latch of claim 1, wherein the latch comprises: a left housing and a right housing;
the left shell is provided with a left half through hole, and the right shell is provided with a right half through hole;
The left shell and the right shell are detachably connected, and the left half through hole and the right half through hole form the through hole.
3. the latch of claim 2 wherein said left housing has a male connector and said right housing has a female connector, said male connector and said female connector engaging to releasably connect said left housing to said right housing.
4. The latch of claim 3 wherein the male connector comprises: the first clamping hook and the first clamping groove;
The female joint includes: the second clamping groove is matched with the first clamping hook, and the second clamping hook is matched with the first clamping groove.
5. the latch of claim 1 wherein the underside of the latch is provided with a mounting notch shaped to match the shape of the handle by which the latch snaps onto the handle.
6. the latch of claim 5 wherein said mounting channel is provided with an adhesive patch, said mounting channel being adhesively attached to said handle.
7. The latch of claim 1 wherein said latch is made of a medical rubber material or a medical plastic material.
8. the latch of claim 1 wherein said latch is of unitary construction with said handle.
9. a syringe, comprising: a syringe, a plunger rod, and a locking member according to any one of claims 1 to 8;
the locking piece is arranged on a handle at the tail end of the needle cylinder.
10. The syringe of claim 9, wherein the number of ribs is four, and the four ribs are arranged in a cross shape on the plunger rod;
The number of locking breach is four, and the position and four the position of protruding muscle corresponds each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920097506.7U CN209751665U (en) | 2019-01-21 | 2019-01-21 | syringe and locking piece thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920097506.7U CN209751665U (en) | 2019-01-21 | 2019-01-21 | syringe and locking piece thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209751665U true CN209751665U (en) | 2019-12-10 |
Family
ID=68749952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920097506.7U Active CN209751665U (en) | 2019-01-21 | 2019-01-21 | syringe and locking piece thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209751665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646297A (en) * | 2019-01-21 | 2019-04-19 | 杭州堃博生物科技有限公司 | Syringe and its lock piece |
-
2019
- 2019-01-21 CN CN201920097506.7U patent/CN209751665U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646297A (en) * | 2019-01-21 | 2019-04-19 | 杭州堃博生物科技有限公司 | Syringe and its lock piece |
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