CN208912111U - Pipette is used in teaching - Google Patents

Pipette is used in teaching Download PDF

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Publication number
CN208912111U
CN208912111U CN201821379135.3U CN201821379135U CN208912111U CN 208912111 U CN208912111 U CN 208912111U CN 201821379135 U CN201821379135 U CN 201821379135U CN 208912111 U CN208912111 U CN 208912111U
Authority
CN
China
Prior art keywords
press sleeve
teaching
tube body
notch
wall
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.)
Expired - Fee Related
Application number
CN201821379135.3U
Other languages
Chinese (zh)
Inventor
张海燕
王巨龙
王敬敏
尚文静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhu Institute of Technology
Original Assignee
Wuhu Institute of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuhu Institute of Technology filed Critical Wuhu Institute of Technology
Priority to CN201821379135.3U priority Critical patent/CN208912111U/en
Application granted granted Critical
Publication of CN208912111U publication Critical patent/CN208912111U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of teaching pipette, which includes: tube body, latex balloon and press sleeve, and the bottom end of tube body is set as tip, and the bottom of latex balloon has been fixedly communicated connecting tube, and connecting tube is hermetically sheathed on the upper end of tube body;Latex balloon is located at the inside of press sleeve, and connecting tube from-inner-to-outer runs through the bottom wall of press sleeve and is removably fixed on the bottom wall of press sleeve, is provided with the first notch and the second notch on the roof of press sleeve across.The teaching pipette can slow down the speed for drawing liquid, improve the precision for drawing liquid.

Description

Pipette is used in teaching
Technical field
The utility model relates to experiment appliances, more particularly to teaching pipette.
Background technique
Currently, pipette generally uses a canals of stilling and a latex balloon connection connection, it is by pressing latex balloon Liquid can be drawn, but often causes to be mingled with air in drawn liquid by drawing liquid excessive velocities, influences to inhale Precision is taken, the length additionally, due to canals of stilling is that definite value can not adjust length according to the depth of actual load container.
Utility model content
The purpose of the utility model is to provide a kind of teaching pipette, which can slow down absorption liquid Speed, improve draw liquid precision.
To achieve the goals above, the utility model provides a kind of teaching pipette, which includes: with pipette Tube body, latex balloon and press sleeve, the bottom end of the tube body are set as tip, and the bottom of the latex balloon has been fixedly communicated connection Pipe, the connecting tube are hermetically sheathed on the upper end of the tube body;The latex balloon is located at the inside of the press sleeve, the company Adapter tube from-inner-to-outer runs through the bottom wall of the press sleeve and is removably fixed on the bottom wall of the press sleeve, the press sleeve Roof on be provided with the first notch and the second notch across.
Preferably, the roof of the press sleeve raises upward to form spherical.
Preferably, the connecting tube is bolted in the upper end of tube body.
Preferably, elastic film gum cover is provided between the inner wall of the connecting tube and the outer wall of the tube body.
Preferably, the lateral wall of the tube body upper end is cylinder, and the wall thickness of the tube body upper end is from top to bottom gradually Increase.
Preferably, the wall thickness on the tube body top is 0.2-0.5mm.
Preferably, the roof of the press sleeve and side wall are elastic soft rubber, and are integrally formed setting.
Preferably, the bottom wall of the press sleeve is hard plastic, is provided with through-hole, the connection on the bottom wall of the press sleeve Pipe protrudes into the press sleeve from the throughhole portions spiral.
Preferably, first notch and the second notch square crossing, and the midpoint of first notch and second edge of a knife It is overlapped with the roof center of the press sleeve.
Preferably, when being in non-pressing state, the side wall of the press sleeve is closely attached on the outer wall of the latex balloon.
According to the above technical scheme, the bottom end of tube body described in the utility model is set as tip, the bottom of the latex balloon Portion has been fixedly communicated connecting tube, and the connecting tube is hermetically sheathed on the upper end of the tube body;The latex balloon is located at described press The inside of pressing sleeve, the connecting tube from-inner-to-outer run through the bottom wall of the press sleeve and are removably fixed in the press sleeve On bottom wall, the first notch and the second notch are provided on the roof of the press sleeve across.In use, the tip of tube body is stretched Enter to liquid to be drawn, slowly press press sleeve and then be pressed into latex balloon, by the air discharge portion in latex balloon point, so Continue the hand for slowly unclamping pressing press sleeve afterwards, liquid is then drawn into pipette.Due to first when pressing press sleeve Notch and the second notch can form four glue valves upward or downward, will form gap, press sleeve and latex balloon between four glue valves Between air can be then discharged from gap, gap can gradually collapse so that final extensive when the slow hand for unclamping pressing The multiple tight closure state to reset condition, at this point, air can only slowly enter between press sleeve and latex balloon from gap Interlayer space in, the deformation resume speed of natural latex balloon it is more traditional it is direct by latex balloon is exposed in air will be slow It is more, so that the speed for drawing liquid is then slow very much, would not make because of operation error when drawing liquid due to pine The excessive velocities of early sucking glueballs and cause to draw air into tube body, influence the precision of absorption.
Other feature and advantage of the utility model will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to be used to provide a further understanding of the present invention, and constitute part of specification, and following Specific embodiment be used to explain the utility model together, but do not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of overall structure diagrammatic cross-section of preferred embodiment of teaching pipette in the utility model;
Fig. 2 is a kind of top view of preferred embodiment of press sleeve in the utility model.
Description of symbols
1 tube body, 2 press sleeve
3 latex balloon, 4 connecting tube
5 first notch, 6 second notch
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
In the present invention, in the absence of explanation to the contrary, term is included in " up and down, inside and outside front and back " etc. In the noun of locality only represent orientation of the term under normal service condition, or be those skilled in the art understand that be commonly called as, and It is not construed as the limitation to the term.
Referring to teaching pipette shown in Fig. 1-2, which includes: tube body 1, latex balloon 3 and press sleeve 2, the bottom end of the tube body 1 is set as tip, and the bottom of the latex balloon 3 has been fixedly communicated connecting tube 4, and the connecting tube 4 is close Feud is sheathed on the upper end of the tube body 1;The latex balloon 3 is located at the inside of the press sleeve 2, the connecting tube 4 from interior and Run through the bottom wall of the press sleeve 2 outside and is removably fixed on the bottom wall of the press sleeve 2, the roof of the press sleeve 2 On be provided with the first notch 5 and the second notch 6 across.
Through the implementation of the above technical solution, the bottom end of the tube body 1 is set as tip, and the bottom of the latex balloon 3 connects Logical to be connected with connecting tube 4, the connecting tube 4 is hermetically sheathed on the upper end of the tube body 1;The latex balloon 3 is located at described press The inside of pressing sleeve 2,4 from-inner-to-outer of connecting tube run through the bottom wall of the press sleeve 2 and are removably fixed in the pressing On the bottom wall of set 2, the first notch 5 and the second notch 6 are provided on the roof of the press sleeve 2 across.In use, by tube body 1 tip stretches in liquid to be drawn, and slowly presses press sleeve 2 and then is pressed into latex balloon 3, by the sky in latex balloon 3 Gas discharge part, then proceedes to the hand for slowly unclamping pressing press sleeve 2, and liquid is then drawn into pipette.Due to by pressing First notch 5 and the second notch 6 can form four glue valves upward or downward when pressing sleeve 2, will form seam between four glue valves Gap, the air between press sleeve 2 and latex balloon 3 can then be discharged from gap, gap meeting when the slow hand for unclamping pressing Gradually collapse so that final restore to the tight closure state of reset condition, at this point, air can only slowly from gap into Enter in the interlayer space between press sleeve 2 and latex balloon 3, more traditional direct of the deformation resume speed of natural latex balloon 3 will be newborn Glueballs 3 is exposed to want slowly more in air, so that the speed for drawing liquid is then slow very much, would not make because of operation error Cause to draw air into tube body 1 due to unclamping the excessive velocities of latex balloon 3 when drawing liquid, influences absorption Precision.
In this embodiment, in order to remaining that press sleeve 2 is formed on the roof of press sleeve 2 after being pressed Glue valve expand outwardly, it is preferable that the roof of the press sleeve 2 raises upward to form spherical.
In this embodiment it is preferred that ground, the connecting tube 4 is bolted in the upper end of tube body 1.It in this way can be with The length that tube body 1 can enter in container is adjusted according to the container depth of different filling solutions, and then most suitable in outside reservation Reach optimal imbibition effect in the case where drawing length.
In this embodiment, in order to increase the sealing performance connected between connecting tube 4 and tube body 1, it is preferable that the company Elastic film gum cover is provided between the inner wall of adapter tube 4 and the outer wall of the tube body 1.
In this embodiment, accumulate liquid on the top end face of tube body 1 in order to prevent, influence to measure precision, it is preferable that institute The lateral wall of 1 upper end of tube body is stated as cylinder, and the wall thickness of 1 upper end of the tube body is gradually increased from top to bottom.
In this embodiment, accumulate liquid on the top end face in order to further prevent tube body 1, it is preferable that the tube body 1 The wall thickness on top is 0.2-0.5mm.
In this embodiment, in order to improve the pressing effect of press sleeve 2, it is preferable that the roof of the press sleeve 2 and side Wall is elastic soft rubber, and is integrally formed setting.
In this embodiment, in order to realize the detachability of press sleeve 2, it is preferable that the bottom wall of the press sleeve 2 is hard Plastic cement is provided with through-hole on the bottom wall of the press sleeve 2, and the connecting tube 4 protrudes into the pressing from the throughhole portions spiral In set 2.When needing to dismantle, the upward spiral of press sleeve 2 is driven out to the upper end of connecting tube 4, by compression leg press sleeve 2 and then is pressed into cream Glueballs 3, so that latex balloon 3 is pulled out out of through-hole after generating deformation.
In this embodiment, in order to enable the disengaging gas of 6 position of the first notch 5 and the second notch is balanced, it is preferable that institute State 6 square crossing of the first notch 5 and the second notch, and the midpoint of first notch 5 and second edge of a knife and the press sleeve 2 Roof center is overlapped.
In this embodiment, for the ease of being pressed into latex balloon 3, it is preferable that when being in non-pressing state, the pressing The side wall of set 2 is closely attached on the outer wall of the latex balloon 3.
Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail in conjunction with attached drawing above Detail in above embodiment can be to the skill of the utility model in the range of the technology design of the utility model Art scheme carries out a variety of simple variants, these simple variants belong to the protection scope of the utility model.
It is further to note that specific technical features described in the above specific embodiments, in not lance It in the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the utility model is to each No further explanation will be given for the possible combination of kind.
In addition, any combination can also be carried out between a variety of different embodiments of the utility model, as long as it is not disobeyed The thought for carrying on the back the utility model, equally should be considered as content disclosed in the utility model.

Claims (10)

1. a kind of teaching pipette, which is characterized in that the teaching pipette includes: tube body (1), latex balloon (3) and presses Pressing sleeve (2), the bottom end of the tube body (1) are set as tip, and the bottom of the latex balloon (3) has been fixedly communicated connecting tube (4), institute State the upper end that connecting tube (4) is hermetically sheathed on the tube body (1);
The latex balloon (3) is located at the inside of the press sleeve (2), and connecting tube (4) from-inner-to-outer runs through the press sleeve (2) bottom wall is simultaneously removably fixed on the bottom wall of the press sleeve (2), is set across on the roof of the press sleeve (2) It is equipped with the first notch (5) and the second notch (6).
2. teaching pipette according to claim 1, which is characterized in that the roof of the press sleeve (2) raises upward To form spherical.
3. teaching pipette according to claim 1 or 2, which is characterized in that the connecting tube (4) is bolted in tube body (1) upper end.
4. teaching pipette according to claim 3, which is characterized in that the inner wall and the pipe of the connecting tube (4) Elastic film gum cover is provided between the outer wall of body (1).
5. teaching pipette according to claim 1 or 2, which is characterized in that the lateral wall of tube body (1) upper end is Cylinder, and the wall thickness of the tube body (1) upper end is gradually increased from top to bottom.
6. teaching pipette according to claim 5, which is characterized in that the wall thickness on tube body (1) top is 0.2- 0.5mm。
7. teaching pipette according to claim 1 or 2, which is characterized in that the roof and side wall of the press sleeve (2) For elastic soft rubber, and it is integrally formed setting.
8. teaching pipette according to claim 7, which is characterized in that the bottom wall of the press sleeve (2) is hard plastic, Through-hole is provided on the bottom wall of the press sleeve (2), the connecting tube (4) protrudes into the press sleeve from the throughhole portions spiral (2) in.
9. teaching pipette according to claim 1 or 2, which is characterized in that first notch (5) and the second notch (6) square crossing, and the midpoint of first notch (5) and the second notch is overlapped with the roof center of the press sleeve (2).
10. teaching pipette according to claim 1 or 2, which is characterized in that described to press when being in non-pressing state The side wall of pressing sleeve (2) is closely attached on the outer wall of the latex balloon (3).
CN201821379135.3U 2018-08-24 2018-08-24 Pipette is used in teaching Expired - Fee Related CN208912111U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821379135.3U CN208912111U (en) 2018-08-24 2018-08-24 Pipette is used in teaching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821379135.3U CN208912111U (en) 2018-08-24 2018-08-24 Pipette is used in teaching

Publications (1)

Publication Number Publication Date
CN208912111U true CN208912111U (en) 2019-05-31

Family

ID=66704133

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821379135.3U Expired - Fee Related CN208912111U (en) 2018-08-24 2018-08-24 Pipette is used in teaching

Country Status (1)

Country Link
CN (1) CN208912111U (en)

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Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190531

Termination date: 20210824