CN208356808U - A kind of spring arrangement on pipettor - Google Patents
A kind of spring arrangement on pipettor Download PDFInfo
- Publication number
- CN208356808U CN208356808U CN201820693443.7U CN201820693443U CN208356808U CN 208356808 U CN208356808 U CN 208356808U CN 201820693443 U CN201820693443 U CN 201820693443U CN 208356808 U CN208356808 U CN 208356808U
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- China
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- piston
- piston spring
- spring
- fixing piece
- operation button
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Abstract
A kind of spring arrangement on pipettor, including operation button connecting rod, piston spring gasket, piston spring fixing piece, piston spring, metal screw, lower link, piston rod fixing piece and piston rod；The piston spring fixing piece, metal screw and lower link are coaxial and be sequentially connected, operation button connecting rod sequentially passes through behind the inside of piston spring fixing piece and metal screw in lower link, and is connect by the piston rod fixing piece being set in lower link with piston rod；The piston spring is placed on operation button connecting rod and in tensional state.Piston spring uses three-stage structure, one end central diameter increases and is fixed in piston spring fixing piece by the plastic deformation of piston spring gasket, in the diminution of other end central diameter and the groove being stuck on operation button connecting rod, it is achieved in fixing and drawing high for piston spring, to alleviate the operating pressure of pipettor, so that operating handle is greatly improved.
Description
Technical field
Spring the utility model relates to chemical field more particularly to chemical experimental instrument, on especially a kind of pipettor
Device.
Background technique
Pipettor is one of common instrument in Biochemistry Experiment room, is usually used in pipetting a small amount of or micro liquid in laboratory
Body.The pipettor of different size matches different size of suction nozzle, and the shape of different manufacturer's productions is also slightly different, but
Working principle and operating method are almost the same.Pipettor category precision instrument, use and be intended to when storing it is careful, it is anti-to stop loss
It is bad, it avoids influencing its range.In the prior art, pipettor is easy to influence its accuracy and repeatability because of biggish operating pressure,
And operating handle is poor.
Utility model content
The utility model is in view of the above-mentioned problems, provide the spring arrangement on a kind of pipettor.
The purpose of this utility model can be realized by following technical proposals: the spring arrangement on a kind of pipettor, packet
It is solid to include operation button connecting rod, piston spring gasket, piston spring fixing piece, piston spring, metal screw, lower link, piston rod
Determine part and piston rod；The piston spring fixing piece, metal screw and lower link are coaxial and be sequentially connected, and piston spring is fixed
The inside of part, metal screw and lower link is hollow, and one end of the operation button connecting rod is set to outside piston spring fixing piece,
The other end of operation button connecting rod sequentially passes through behind the inside of piston spring fixing piece and metal screw in lower link, and passes through
The piston rod fixing piece being set in lower link to connect with piston rod；The piston spring is tension spring, and piston spring is placed on behaviour
Make on button connecting rod and in tensional state, piston spring fixing piece is fixed on by piston spring gasket in one end of piston spring
Interior, the other end of piston spring is fixed on the other end of operation button connecting rod.
Further, lid set is socketed on one end of the operation button connecting rod.
Further, the metal screw one end be packed into piston spring fixing piece in and with piston spring fixing piece interference
Cooperation.
Further, the other end of the metal screw is packed into lower link and is threadedly coupled with lower link.
Further, one end of the piston rod fixing piece is in sleeve-shaped, and the other end of the operation button connecting rod is inserted into
In one end of piston rod fixing piece and it is fixed by screws；The other end of the piston rod fixing piece is equipped with threaded hole, and
It is connect with piston rod thread.
Further, the piston spring is divided into three sections, respectively one end of piston spring, the middle part of piston spring and
The other end of piston spring, and the central diameter of the other end of one end of piston spring, the middle part of piston spring and piston spring is
It sets gradually from big to small；One end of the piston spring is stuck in the ring-shaped step circumferentially formed in piston spring fixing piece
On, and fixed by the plastic deformation of piston spring gasket with piston spring fixing piece；The other end card of the piston spring
It realizes and fixes in the annular groove circumferentially formed on the operation button connecting rod other end.
Compared with the prior art, the advantages of the utility model are: structure is simple, the piston bullet in operation button connecting rod is covered
Spring uses the tension spring of three-stage structure, and one end central diameter increases and is fixed on piston bullet by the plastic deformation of piston spring gasket
In spring fixing piece, in the diminution of other end central diameter and the groove being stuck on operation button connecting rod, it is achieved in the fixation of piston spring
And draw high, the operating pressure of pipettor is alleviated, so that operating handle is greatly improved, and metal screw and lower company
The threaded connection of bar can adjust up and down, and then be adjustable the stroke of piston rod and the range of pipettor.
Detailed description of the invention
Fig. 1 is the overall structure diagram that the utility model conceals piston rod.
Fig. 2 is the structural schematic diagram on the utility model top.
Fig. 3 is the structural schematic diagram in the middle part of the utility model.
Fig. 4 is the structural schematic diagram of the utility model lower part.
It is marked in figure as follows:
1 operation button connecting rod
101 annular grooves
2 piston spring gaskets
3 piston spring fixing pieces
301 ring-shaped steps
4 piston springs
5 metal screws
6 lower links
7 piston rod fixing pieces
701 threaded holes
8 lid sets.
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing, becomes apparent from those skilled in the art
How ground understanding practices the utility model.Although describing the utility model in conjunction with its preferred embodiment, these
Embodiment only illustrates, rather than limits the scope of the utility model.
Referring to Fig. 1 to Fig. 4, a kind of spring arrangement on pipettor, including operation button connecting rod 1, piston spring gasket 2,
Piston spring fixing piece 3, piston spring 4, metal screw 5, lower link 6, piston rod fixing piece 7 and piston rod (do not show in figure
Out)；The piston spring fixing piece 3, metal screw 5 and lower link 6 are coaxial and be sequentially connected, and one end of metal screw 5 is packed into
Be interference fitted in piston spring fixing piece 3 and with piston spring fixing piece 3, the other end of metal screw 5 be packed into lower link 6 and
It is threadedly coupled with lower link 6；The inside of the piston spring fixing piece 3, metal screw 5 and lower link 6 is hollow, the operation
One end of button connecting rod 1 is set to outside piston spring fixing piece 3, and for pressing, the other end of the operation button connecting rod 1 is successively
To in lower link 6 behind the inside of piston spring fixing piece 3 and metal screw 5, and the piston by being set in lower link 6
Bar fixing piece 7 is connect with piston rod；The piston spring 4 is tension spring, and piston spring 4 is placed on operation button connecting rod 1 and locates
It is fixed in piston spring fixing piece 3 in one end of tensional state, piston spring 4 by piston spring gasket 2, piston spring 4
The other end be fixed on the other end of operation button connecting rod 1.
In the specific implementation, lid set 8 is socketed on one end of the operation button connecting rod 1.Lid set 8 for plastic parts and
It is molded integrally with operation button connecting rod 1.Lid set 8 make it is operational feeling is better, be more advantageous to operation button connecting rod 1 into
Row depression.
In the specific implementation, one end of the piston rod fixing piece 7 is fixedly connected with the other end of operation button connecting rod 1,
More specifically, one end of the piston rod fixing piece 7 is in sleeve-shaped, the other end of the operation button connecting rod 1 is inserted into piston rod
In one end of fixing piece 7 and it is fixed by screws；The other end of the piston rod fixing piece 7 be equipped with threaded hole 701, and with
Piston rod thread connection.
In the specific implementation, the piston spring 4 is divided into three sections, respectively one end of piston spring 4, piston spring 4
Middle part and piston spring 4 the other end, and one end of piston spring 4, the middle part of piston spring 4 and piston spring 4 it is another
The central diameter of one end is to set gradually from big to small；One end of the piston spring 4 is stuck in piston spring fixing piece 3 circumferentially shape
At ring-shaped step 301 on, and by the plastic deformation of piston spring gasket 2 come fixed with piston spring fixing piece 3；The work
The other end of plug spring 4 is stuck in the annular groove 101 circumferentially formed on 1 other end of operation button connecting rod and realizes fixed (figure
In be not shown).
In use, depression button connecting rod 1, moves down piston rod fixing piece 7 in lower link 6, so make with
The piston rod that piston rod fixing piece 7 connects moves down, itself is further stretched in the piston spring 4 of tensional state, when release,
4 retracted for clearance of piston spring drives piston rod fixing piece 7 and operation button connecting rod 1 to move up reset together.It is living during this
Stopper rod can form negative pressure with cylinder, to realize the absorption and discharge of liquid.
It should be noted that the other end of metal screw 5 and the threaded connection of lower link 6 can adjust up and down, to adjust
The stroke for saving piston rod achievees the purpose that adjust range.
It should be pointed out that can also have a variety of transformation and the implementation of remodeling for the utility model through absolutely proving
Scheme, it is not limited to the specific embodiment of above embodiment.Above-described embodiment as just the utility model explanation, and
It is not limitations of the present invention.In short, the protection scope of the utility model should include those for ordinary skill
It obviously converts or substitutes and retrofit for personnel, and be determined by the appended claims.
Claims (6)
1. the spring arrangement on a kind of pipettor, which is characterized in that including operation button connecting rod, piston spring gasket, piston bullet
Spring fixing piece, piston spring, metal screw, lower link, piston rod fixing piece and piston rod；The piston spring fixing piece, gold
Belong to screw rod and lower link is coaxial and be sequentially connected, the inside of piston spring fixing piece, metal screw and lower link is hollow, described
One end of operation button connecting rod is set to outside piston spring fixing piece, and the other end of operation button connecting rod sequentially passes through piston spring
To in lower link behind the inside of fixing piece and metal screw, and the piston rod fixing piece by being set in lower link come with piston
Bar connection；The piston spring is tension spring, and piston spring is placed on operation button connecting rod and is in tensional state, piston spring
One end is fixed in piston spring fixing piece by piston spring gasket, and the other end of piston spring is fixed on operation button connecting rod
The other end on.
2. the spring arrangement on pipettor according to claim 1, which is characterized in that one end of the operation button connecting rod
On be socketed with lid set.
3. the spring arrangement on pipettor according to claim 1, which is characterized in that one end of the metal screw is packed into
It is interference fitted in piston spring fixing piece and with piston spring fixing piece.
4. the spring arrangement on pipettor according to claim 1, which is characterized in that the other end of the metal screw fills
Enter in lower link and is threadedly coupled with lower link.
5. the spring arrangement on pipettor according to claim 1, which is characterized in that one end of the piston rod fixing piece
In sleeve-shaped, in one end of the other end insertion piston rod fixing piece of the operation button connecting rod and it is fixed by screws；
The other end of the piston rod fixing piece is equipped with threaded hole, and connect with piston rod thread.
6. the spring arrangement on pipettor according to claim 1, which is characterized in that the piston spring is divided into three
Section, the respectively other end of one end of piston spring, the middle part of piston spring and piston spring, and one end of piston spring,
The central diameter of the other end at the middle part and piston spring of piston spring is to set gradually from big to small；One end card of the piston spring
On the ring-shaped step circumferentially formed in piston spring fixing piece, and by the plastic deformation of piston spring gasket come with piston
Spring mountings are fixed；The other end of the piston spring is stuck in the annular groove circumferentially formed on the operation button connecting rod other end
It is interior and realize fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820693443.7U CN208356808U (en) | 2018-05-10 | 2018-05-10 | A kind of spring arrangement on pipettor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820693443.7U CN208356808U (en) | 2018-05-10 | 2018-05-10 | A kind of spring arrangement on pipettor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208356808U true CN208356808U (en) | 2019-01-11 |
Family
ID=64934130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820693443.7U Active CN208356808U (en) | 2018-05-10 | 2018-05-10 | A kind of spring arrangement on pipettor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208356808U (en) |
-
2018
- 2018-05-10 CN CN201820693443.7U patent/CN208356808U/en active Active
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