CN205287112U - Adjustable injection pen - Google Patents
Adjustable injection pen Download PDFInfo
- Publication number
- CN205287112U CN205287112U CN201520948922.5U CN201520948922U CN205287112U CN 205287112 U CN205287112 U CN 205287112U CN 201520948922 U CN201520948922 U CN 201520948922U CN 205287112 U CN205287112 U CN 205287112U
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- screw element
- push rod
- injection pen
- move
- adjustable injection
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Abstract
The utility model discloses an adjustable injection pen, including push rod, support, casing, decide the screw element, move screw element and both ends respectively with decide the screw element and move screw element fixed connection's elasticity of compression spare, decide screw element and support fixed connection, decide the screw element and move the screw element all with push rod screw thread fixed connection, be equipped with in the casing to be used for holding and move the screw element, and the bottom can with the spacing groove that moves screw element bottom butt, move the screw element and can slide from top to bottom at limiting groove edge push rod direction of motion. Through setting up two screw elements, and one of them is for deciding the screw element, and another is for moving the screw element, decides the screw element and move the screw element to pass through elasticity of compression spare and connect, utilizes the opposite force of elasticity of compression spare, make and move the screw element and decide screw element production opposite acting force, the elimination move the screw element and decide the screw element and the push rod screw thread between the clearance, and then improved adjustable injection pen's injection precision.
Description
Technical field
This utility model relates to technical field of medical equipment, particularly to a kind of adjustable injection pen.
Background technology
Being on the increase now with diabetics, hepatitis etc., the device that adjustable injection pen is commonly used as insulin injection, interferon etc., it is widely used in the middle of patient.
As it is shown in figure 1, traditional adjustable injection pen includes push rod 01, support 02, screw element 03 and housing etc., wherein, push rod 01 is threadeded with screw element 03, screw element 03 is fixing with support 02 to be connected, and support 02 is arranged on housing, and wherein push rod 01 is single-screw pair push rod.
But, owing to the central diameter of push rod 01 and screw element 03 and half of thread angle error and life-time service can cause the abrasion of tooth form, gap between tooth form is caused to become larger, these gaps can cause screw element or screw rod to change part corresponding when turning to can not produce counteragent at once, when only turning to certain position or angle when active parts, driven part just can produce adverse movement, this phenomenon is idle running, owing to transmission error is caused in gap during transmission, cause that the injection precision of adjustable injection pen reduces.
Therefore, how to improve the injection precision of adjustable injection pen, be those skilled in the art's technical problems urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of adjustable injection pen, and the injection precision of this adjustable injection pen improves.
For achieving the above object, this utility model provides a kind of adjustable injection pen, including push rod, support, housing and determine screw element with described push rod is threadeded, described determine that screw element and described support are fixing to be connected, also include dynamic screw element and two ends determine screw element with described respectively and described dynamic screw element fixes the compression elastic piece being connected, it is provided with for holding described dynamic screw element in described housing, and the stopper slot that bottom can abut with described dynamic screw element bottom, described dynamic screw element can slide up and down along described pushrod movement direction in described stopper slot, described dynamic screw element is threadeded with described push rod.
Preferably, described compression elastic piece is compression spring, and described compression elastic piece is set on described push rod.
It is preferably, described that to determine screw element be rustless steel screw element.
Preferably, described dynamic screw element is rustless steel screw element.
Preferably, the top of described push rod is provided with handle press section.
Preferably, described screw element is determined and described dynamic screw element is nut.
Preferably, described stopper slot inwall is cylindrical.
In technique scheme, the adjustable injection pen that this utility model provides includes push rod, support, housing, determine screw element, move screw element and two ends respectively with determine screw element and dynamic screw element fixes the compression elastic piece being connected, determine that screw element and support are fixing to be connected, determine screw element and dynamic screw element is all screwed with push rod and is connected, it is provided with for holding dynamic screw element in housing, and the stopper slot that bottom can abut with dynamic screw element bottom, dynamic screw element can slide up and down along pushrod movement direction in stopper slot.
By foregoing description, in the adjustable injection pen that this utility model provides, by arranging two screw elements, and one of them is for determine screw element, another is dynamic screw element, and determining screw element and dynamic screw element is connected by compression elastic piece, utilize the opposite force of compression elastic piece, make screw element and determine screw element generation opposition, eliminating dynamic screw element and the gap determined between screw element and push rod screw thread, and then improve the injection precision of adjustable injection pen.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional adjustable injection pen;
The structural representation of the adjustable injection pen that Fig. 2 provides for this utility model embodiment;
Fig. 3 is adjustable injection pen shown in Fig. 2 along the structural representation in A-A direction;
The partial enlarged drawing of the adjustable injection pen that Fig. 4 provides for this utility model embodiment.
Wherein in Fig. 1-4: 01-push rod, 02-support, 03-screw element;
1-push rod, 2-support, 3-determine screw element, 4-dynamic screw element, 5-compression elastic piece, 6-housing, 7-duct ring.
Detailed description of the invention
Core of the present utility model is to provide a kind of adjustable injection pen, and the injection precision of this adjustable injection pen improves.
In order to make those skilled in the art be more fully understood that the technical solution of the utility model, below in conjunction with drawings and embodiments, the utility model is described in further detail.
Refer to Fig. 2 to Fig. 4, in a kind of detailed description of the invention, the adjustable injection pen that this utility model provides includes push rod 1, support 2, housing 6, determine screw element 3, dynamic screw element 4 and two ends respectively with determine screw element 3 and dynamic screw element 4 fixes the compression elastic piece 5 being connected, determine that screw element 3 and support 2 is fixing to be connected, determine screw element 3 and dynamic screw element 4 is all threadeded with push rod 1, it is provided with in housing 6 for holding dynamic screw element 4, and the stopper slot that bottom can abut with dynamic screw element 4 bottom. Stopper slot can near the cone tank determining screw element 3 direction flaring, and dynamic screw element 4 can slide up and down along push rod 1 direction of motion in stopper slot. Concrete, compression elastic piece 5 can be elastic steel sheet or corrugated tube, in order to reduce compression elastic piece 5 manufacturing cost, it is preferable that compression elastic piece 5 is compression spring, and wherein compression elastic piece 5 is set on push rod 1. Push rod 1 is promoted, it is preferable that the top of push rod 1 is provided with handle press section for the ease of staff. In order to extend service life and the degree of regulation of adjustable injection pen, it is preferable that determine screw element 3 and/or dynamic screw element 4 is rustless steel screw element, certainly, determine screw element 3 and/or dynamic screw element 4 can also be copper screw element or alloy screw element etc.
Action specification: support 2 rotarily drives determines screw element 3 and when dynamic screw element 4 rotates counterclockwise, push rod 1 does not have axial displacement and other space to move under the effect of unidirectional ratchet (two sides that push rod 1 is other), support 2, dynamic screw element 4 and determine screw element 3 and can only move after entirety (right-handed thread is secondary) so that support 2, dynamic screw element 4 and determine screw element 3 and push rod 1 and other parts formation mobile space. Pressed stress when support 2 by other parts and pass to push rod 1, move integrally drive push rod 1 and drive other parts medicated core piston to complete liquid medicine injection.
According to document �� �� �� o �� �� �� �� �� �� �� o �� �� �� e �� �� e �� o �� �� �� �� �� �� �� �� �� o �� �� �� o e �� �� �� �� ��. ��The duct ring that Soviet Union's scholar's Aleksandr Zabelin provides closes the hypothesis of circle. Assuming the matching thread just meeting stress of effectively engagement in screw thread pair, be duct ring, circle is closed in crying of not stressing. After adding governor motion, as shown in Figure 4, due to the active force of compression elastic piece 5 so that dynamic screw element 4 exists under the premise regulating gap and determines the reverse stress of screw element 3, determines the duct ring 7 between screw element 3 and push rod 1 all the time in the side, direction that is stressed. Dynamic duct ring 7 between screw element 4 and push rod 1 is regulating side, direction all the time. So, during pressurized, the duct ring 7 determining screw element 3 is played a role, and the duct ring 7 of dynamic screw element 4 is inoperative. During rotation, the duct ring 7 of dynamic screw element 4 plays a role, and does not result in idle running. Owing to the dynamics of compression elastic piece 5 is limited, rotation is not blocked, but between nut and push rod 1, the disappearance in gap brings is the strength disappearance of moving time error. Determining screw element 3 and dynamic screw element 4 by being divided into by the single screw element in single-screw pair, be fixed on support 2 by determining screw element 3, dynamic screw element 4 slides and the effect of elastic component 5 power by compression in support 2. In this adjustable injection pen, the dynamics of compression elastic piece 5 makes the duct ring 7 determining screw element 3 be retained in the side, direction that is stressed in adjustable pen, and the duct ring 7 determining screw element 3 when pressed plays a role. In this mechanism same, the dynamics of compression elastic piece 5 makes the duct ring 7 of dynamic screw element 4 be retained in the pivotal Impact direction of nut, support 2 drives the duct ring 7 moving screw element 4 when screw element 4 is overall to turn round to play a role, and effectively eliminates the wear error caused because of central diameter, thread form angle foozle and life-time service. Improve screw pair transmitting accuracy. The application utilizes the opposite force of compression elastic piece 5, make to determine screw element 3 and dynamic screw element 4 produces opposition, eliminate the gap determining between screw element 3 and dynamic screw element 4 and push rod 1, the feature of the method is, compact conformation, dynamics can be regulated by compression elastic piece 5 parameter so that has both eliminated gap, improve transmission accuracy, nor affect on the motion between push rod 1 and screw element.
Meanwhile, this adjustable injection pen by compression elastic piece 5, determine screw element 3 and dynamic screw element 4 is and improves precision and provide reliable guarantee, reduce cost of goods manufactured.
Preferably, determine screw element 3 and dynamic screw element 4 is nut. Being nut owing to determining screw element 3 and dynamic screw element 4, staff can directly buy in market, it is to avoid the individually situation of processing and manufacturing. Certainly, in order to mate the push rod 1 of Multiple Type, staff can manufacture voluntarily and determine screw element 3 and dynamic screw element 4.
On the basis of above-mentioned each scheme, it is preferable that stopper slot inwall is cylindrical.Owing to stopper slot inwall is cylindrical, it is easy to staff's processing, machining can be adopted to realize simultaneously, simultaneously, when compression elastic piece 5 is for compression spring, it is preferable that compression spring is helical spring, and compressing spring cross-sectional diameter and stopper slot inwall matched in clearance, it is to avoid compression spring is in the enterolithic situation of stopper slot.
In this specification, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this utility model. The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein when without departing from spirit or scope of the present utility model, can realize in other embodiments. Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (7)
1. an adjustable injection pen, including push rod (1), support (2), housing (6) and threaded with described push rod (1) determine screw element (3), described determine that screw element (3) and described support (2) are fixing to be connected, it is characterized in that, also include dynamic screw element (4) and screw element (3) and the fixing compression elastic piece (5) being connected of described dynamic screw element (4) are determined with described respectively in two ends, it is provided with for holding described dynamic screw element (4) in described housing (6), and the stopper slot that bottom can abut with described dynamic screw element (4) bottom, described dynamic screw element (4) can slide up and down along described push rod (1) direction of motion in described stopper slot, described dynamic screw element (4) threadeds with described push rod (1).
2. adjustable injection pen according to claim 1, it is characterised in that described compression elastic piece (5) is compression spring, and described compression elastic piece (5) is set on described push rod (1).
3. adjustable injection pen according to claim 1, it is characterised in that described determine screw element (3) for rustless steel screw element.
4. adjustable injection pen according to claim 3, it is characterised in that described dynamic screw element (4) is rustless steel screw element.
5. adjustable injection pen according to claim 1, it is characterised in that the top of described push rod (1) is provided with handle press section.
6. adjustable injection pen according to claim 1, it is characterised in that described determine screw element (3) and described dynamic screw element (4) is nut.
7. the adjustable injection pen according to any one of claim 1-6, it is characterised in that described stopper slot inwall is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520948922.5U CN205287112U (en) | 2015-11-25 | 2015-11-25 | Adjustable injection pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520948922.5U CN205287112U (en) | 2015-11-25 | 2015-11-25 | Adjustable injection pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205287112U true CN205287112U (en) | 2016-06-08 |
Family
ID=56461522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520948922.5U Active CN205287112U (en) | 2015-11-25 | 2015-11-25 | Adjustable injection pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205287112U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308523A (en) * | 2017-08-08 | 2017-11-03 | 甘肃成纪生物药业有限公司 | Finely tune injection pen |
-
2015
- 2015-11-25 CN CN201520948922.5U patent/CN205287112U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308523A (en) * | 2017-08-08 | 2017-11-03 | 甘肃成纪生物药业有限公司 | Finely tune injection pen |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |