CN202020754U - Limit mechanism of electronic insulin syringe - Google Patents
Limit mechanism of electronic insulin syringe Download PDFInfo
- Publication number
- CN202020754U CN202020754U CN2011201205373U CN201120120537U CN202020754U CN 202020754 U CN202020754 U CN 202020754U CN 2011201205373 U CN2011201205373 U CN 2011201205373U CN 201120120537 U CN201120120537 U CN 201120120537U CN 202020754 U CN202020754 U CN 202020754U
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- China
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- screw rod
- piston rod
- bearing
- ring
- shaft
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- Expired - Lifetime
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Abstract
The utility model relates to a limit mechanism of an electronic insulin syringe. The limit mechanism comprises a shaft-out screw rod, a piston rod and a check ring, the shaft-out screw rod is supported on an electric motor by a bearing, the piston rod with a counter bore at one end is rotationally connected on the shaft-out screw rod by screw thread and can axially move, the check ring is arranged in a check ring groove of the shaft-out screw rod, one end of the check ring is connected with an inner ring of the bearing, the other end of the check ring is opposite to the bottom surface of the counter hole of the piston rod, and the depth A of the counter hole of the piston rod is less than the distance B from the bottom surface of the counter hole to the end surface of the bearing. The limit mechanism has the characteristics of reasonable structure and small volume, when the piston rod moves axially, the threads seizure can not be caused to enable the shaft-out screw rod to move which can lead to efficiency losing, and the using reliability is improved.
Description
Technical field
This utility model relates to a kind of position-limit mechanism of electronics insulin syringe, belongs to electronics insulin syringe technical field.
Background technology
Present disclosed insulin automatic injector, mainly form by housing, motor, reduction gearing, clutch, pagoda screw rod, main shaft, rubber piston, circuit board and battery case, liquid-holding pipe etc., motor is through three grades of decelerations of reduction gearing, Duan hollow output wheel shaft is not connected with clutch, the pagoda screw rod is connected with clutch by main shaft, be connected with the pin that is connected on this pagoda screw rod end, locking pin inserts on the rubber piston.After the motor rotation, rotate through slowing down and then driving the output wheel shaft, rotate by clutch drive main shaft again and drive the pagoda screw rod by the joint motion, advancing by locking pin drive rubber piston at last is pressed into human body with insulin.Its main shaft of insulin automatic injector of this kind structure need pass through Clutch Control, and carry out axial limiting by skidding of clutch, and the clutching force of clutch is controlled by spring, complex structure not only, volume is big, in the use, also can be because of clutch moment can not remain unanimity, and reduce the reliability of work.
Summary of the invention
The purpose of this utility model provides a kind of rational in infrastructure, and volume is little, when the piston rod axially reciprocating, can not influence the position-limit mechanism of electronics insulin syringe of the normal rotation of shaft screw rod.
This utility model is that the technical scheme that achieves the above object is: a kind of position-limit mechanism of electronics insulin syringe, it is characterized in that: comprise shaft screw rod, piston rod and back-up ring, described shaft screw rod is bearing on the motor by bearing, its female thread of piston rod that one end has a counterbore is screwed on the shaft screw rod and can moves axially, back-up ring is installed in the circlip groove of shaft screw rod, back-up ring one end joins with bearing inner race, the counterbore bottom surface of the other end and piston rod is relative, and the counterbore degree of depth A of piston rod less than the counterbore bottom surface to bearing face apart from B.
Wherein: describedly go out on the screw rod adjusting pad also is installed, and the two ends of regulating pad join with back-up ring and bearing inner race end face respectively.
Shaft screw rod of the present utility model is installed on the motor by bearing, its female thread of piston rod is screwed on the shaft screw rod and can moves axially, since the counterbore degree of depth A of piston rod less than the counterbore bottom surface to bearing face apart from B, advance when playing a driving role at piston rod, its propulsive thrust acts on the inner ring of bearing by shaft screw rod and back-up ring, and has offset this propulsive thrust by the loading force of bearing; And when piston rod retreats, when piston rod retreats to back-up ring and joins with back-up ring, this moment, piston rod rotated with the shaft screw rod, only produce radially turning moment, making does not have the axial force effect again except that screw thread frictional force between piston rod and the shaft screw rod, thus the shaft screw rod is normally rotated, rational in infrastructure, volume is little, has improved dependability.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the structural representation of the position-limit mechanism of this utility model electronics insulin syringe.
Fig. 2 is the I place structure for amplifying sketch map of Fig. 1.
Wherein: the 1-piston rod, the 11-counterbore, 2-shaft screw rod, the 21-circlip groove, the 3-back-up ring, 4-regulates pad, 5-bearing, 6-motor.
The specific embodiment
See Fig. 1, shown in 2, the position-limit mechanism of electronics insulin syringe of the present utility model, comprise shaft screw rod 2, piston rod 1 and back-up ring 3, shaft screw rod 2 is bearing on the motor 6 by bearing 5, piston rod 1 its female thread that one end has a counterbore 11 is screwed on the shaft screw rod 2 and can moves axially, back-up ring 3 is installed in the circlip groove 21 of shaft screw rod 2, back-up ring 3 one ends and bearing 5 inner rings join, the other end is relative with counterbore 11 bottom surfaces of piston rod 1, this goes out also to be equipped with on the screw rod regulates pad 4, and the two ends of regulating pad 4 join with the inner ring end face of back-up ring 3 and bearing 5 respectively, this back-up ring 3 can adopt split washer, makes things convenient for the installation of back-up ring 3.See shown in Fig. 1,2, the counterbore degree of depth A of this utility model piston rod 1 less than the counterbore bottom surface to bearing face apart from B.
See shown in Fig. 1,2 that during this utility model work, shaft screw rod 2 is connected with the deceleration output gear of motor 6, drive 2 rotations of shaft screw rod by motor 6, when 2 dextrorotation of shaft screw rod, 1 in piston rod retreats, to back-up ring 3 one side shiftings, the counterbore bottom surface and back-up ring 3 ends of piston rod 1 are joined, and shaft screw rod 2 continues dextrorotation, and then piston rod 1 and shaft screw rod 2 rotate together, and produce radially turning moment, can not cause producing relative displacement between shaft screw rod 2 and the bearing 5, and get loose; And shaft screw rod 2 is when left-handed, and piston rod 1 advances and plays a driving role, and the propulsive thrust of piston rod 1 acts on the inner ring of bearing 5 by shaft screw rod 2 and back-up ring 3, and offsets this propulsive thrust by the loading force of bearing.Therefore piston rod 1 of the present utility model can not cause thread biting locking when advancing or bounce back, makes 2 displacements of shaft screw rod and causes inefficacy.
Claims (2)
1. the position-limit mechanism of an electronics insulin syringe, it is characterized in that: comprise shaft screw rod (2), piston rod (1) and back-up ring (3), described shaft screw rod (2) is bearing on the motor (6) by bearing (5), its female thread of piston rod (1) that one end has counterbore (11) is screwed in shaft screw rod (2) and goes up and can move axially, back-up ring (3) is installed in the circlip groove (21) of shaft screw rod (2), back-up ring (3) one ends and bearing (5) inner ring join, the other end is relative with counterbore (11) bottom surface of piston rod (1), and the counterbore degree of depth A of piston rod (1) less than the counterbore bottom surface to bearing face apart from B.
2. the position-limit mechanism of electronics insulin syringe according to claim 1 is characterized in that: also be equipped with on the described shaft screw rod (2) and regulate pad (4), and the two ends of adjusting pad (4) join with back-up ring (3) and bearing (5) inner ring end face respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201205373U CN202020754U (en) | 2011-04-22 | 2011-04-22 | Limit mechanism of electronic insulin syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201205373U CN202020754U (en) | 2011-04-22 | 2011-04-22 | Limit mechanism of electronic insulin syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202020754U true CN202020754U (en) | 2011-11-02 |
Family
ID=44845724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201205373U Expired - Lifetime CN202020754U (en) | 2011-04-22 | 2011-04-22 | Limit mechanism of electronic insulin syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202020754U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142483A (en) * | 2015-04-22 | 2016-11-23 | 江苏天源试验设备有限公司 | A kind of precise injection machine |
| CN110612134A (en) * | 2017-05-05 | 2019-12-24 | 里珍纳龙药品有限公司 | Auto-injectors and related methods of use |
-
2011
- 2011-04-22 CN CN2011201205373U patent/CN202020754U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142483A (en) * | 2015-04-22 | 2016-11-23 | 江苏天源试验设备有限公司 | A kind of precise injection machine |
| CN106142483B (en) * | 2015-04-22 | 2024-02-23 | 江苏天源试验设备有限公司 | Precise injection molding machine |
| CN110612134A (en) * | 2017-05-05 | 2019-12-24 | 里珍纳龙药品有限公司 | Auto-injectors and related methods of use |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160310 Address after: Wujin District of Jiangsu city of Changzhou province Luoyang 213000 town Cen Village Patentee after: JIANGSU DELFU MEDICAL DEVICES CO., LTD. Address before: 213104, 8 Village Road, Luoyang Town, Wujin District, Jiangsu, Changzhou Patentee before: Jiangsu Huayang Electrical Appliances Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |
|
| CX01 | Expiry of patent term |