CN217793066U - Disposable blood taking needle spring - Google Patents
Disposable blood taking needle spring Download PDFInfo
- Publication number
- CN217793066U CN217793066U CN202221538890.8U CN202221538890U CN217793066U CN 217793066 U CN217793066 U CN 217793066U CN 202221538890 U CN202221538890 U CN 202221538890U CN 217793066 U CN217793066 U CN 217793066U
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- Prior art keywords
- spring
- limiting plate
- plate
- positioning ring
- lower limiting
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- Expired - Fee Related
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- 239000008280 blood Substances 0.000 title claims abstract description 22
- 210000004369 blood Anatomy 0.000 title claims abstract description 22
- 238000003825 pressing Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010241 blood sampling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000009534 blood test Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010339 medical test Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to a spring production processing technology field especially relates to a disposable blood taking needle spring, including tube, end plate, depression bar, pressure head, last limiting plate, lower limiting plate, spring body and stop nut, the upper end of tube is equipped with the end plate, internally mounted has lower limiting plate, the depression bar is located the end plate outside and is fixed with the pressure head, is located the end plate and is fixed with last limiting plate, installs at least two rings of spring bodies between the upper and lower limiting plate, the depression bar is located and installs stop nut below the lower limiting plate; the spring body comprises coil spring, last holding ring and lower holding ring, and the inboard of going up the holding plate is seted up annular constant head tank, and the inboard of lower holding plate is seted up lower annular constant head tank. The utility model adopts the multi-circle concentric spring body to be combined for use, thereby greatly improving the fatigue resistance; through set up annular positioning groove respectively in the inboard of upper and lower limiting plate, can avoid the appearance of the spring body skew condition, effect that resets when the guarantee blood sampling.
Description
Technical Field
The utility model relates to a spring production and processing technology field especially relates to a disposable blood taking needle spring.
Background
Disposable blood collection needles are widely used in hospitals and households, and are important tools for collecting blood samples and performing routine blood tests in medical tests. When the needle tube is held by an operator to press the head of the blood taking needle on the limb of a patient, the sheath retracts under the elastic action of the skin, the needle head protrudes and pierces the skin to cause micro-wound, the sheath resets again under the action of the reset spring after the blood taking needle is pulled out to cover the needle head so as to prevent the needle head from being exposed to be polluted or accidentally stabbed on a human body, and the blood taking needle needs the pressure spring to deliver the needle head for taking blood.
The patent specification with the publication number of CN208130002U discloses a disposable blood taking needle, which comprises a shell, wherein a clamping groove I and a clamping groove II are respectively formed in the bottom ends of two sides of the shell, a supporting device is fixedly arranged in the clamping groove II, baffles are fixedly arranged on two sides of the top of an inner cavity of the shell, a blood storage box is movably sleeved in the inner cavity of the shell, a piston plate is movably sleeved at the bottom end of the inner cavity of the blood storage box, a push rod is fixedly arranged in the middle of the piston plate, one end of the push rod extends to the outside of the top end of the shell and is fixedly connected with one side of a handle, and a spring is fixedly arranged in the middle of the top end of the blood storage box.
The disposable blood taking needle spring has the disadvantages that firstly, the disposable blood taking needle spring adopts a single-ring design, and is easy to fatigue failure due to frequent overpressure; secondly, the spring is not provided with a positioning mechanism, so that the position of the spring is easy to deviate, and the resetting effect of the spring is influenced. Therefore, there is a need for optimization improvements.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the problems existing in the prior art and provide a disposable blood taking needle spring.
In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:
the disposable blood taking needle spring comprises a tube shell, an end plate, a pressure rod, a pressure head, an upper limiting plate, a lower limiting plate, a spring body and a limiting nut, wherein the end plate is arranged at the upper end of the tube shell, the lower limiting plate is arranged inside the tube shell, the pressure rod penetrates through the end plate and the lower limiting plate, the pressure head is fixed at the end part of a rod body of the pressure rod, which is positioned outside the end plate, the upper limiting plate is fixed at the rod body positioned inside the end plate, at least two circles of spring bodies are arranged between the upper limiting plate and the lower limiting plate, and the limiting nut is arranged on the rod body of the pressure rod, which is positioned below the lower limiting plate; the spring body comprises a spiral spring, an upper positioning ring welded at the upper end of the spiral spring and a lower positioning ring welded at the lower end of the spiral spring, wherein the inner side of the upper positioning plate is provided with an upper annular positioning groove matched with the upper positioning ring, and the inner side of the lower positioning plate is provided with a lower annular positioning groove matched with the lower positioning ring.
Further, in the disposable lancet spring, a three-ring spring body is installed between the upper limit plate and the lower limit plate.
Furthermore, in the disposable blood taking needle spring, the outer diameters of the upper positioning ring and the lower positioning ring in the same spring body are equal or unequal.
Furthermore, in the disposable blood taking needle spring, the outer diameters of the upper positioning ring and the lower positioning ring are equal, and the spiral spring is a cylindrical spiral spring; the outer diameters of the upper positioning ring and the lower positioning ring are different, and the spiral spring is a reducing spiral spring.
Further, in the above disposable lancet spring, the upper and lower stopper plates have the same outer diameter.
Further, in the above disposable lancet spring, the lower retainer comprises a circular plate, and a sliding hole engaged with the pressing rod is formed at the center of the circular plate.
The utility model has the advantages that:
the utility model has reasonable structural design, on one hand, the multi-circle concentric spring body is combined for use, and the fatigue resistance can be greatly improved compared with a single-circle spring; on the other hand sets up annular positioning groove respectively through the inboard of last limiting plate, lower limiting plate, and the both ends holding ring of the spring body is blocked respectively in the annular positioning groove that corresponds, can avoid the appearance of skew condition, effect that resets when the guarantee blood sampling.
Of course, it is not necessary for any product to achieve all of the above advantages simultaneously in practicing the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the usage state of the present invention;
FIG. 2 is a schematic view of the present invention with the tube shell omitted;
fig. 3 is a schematic structural view of the spring body of the present invention;
fig. 4 is a schematic structural view of the middle and lower limiting plates of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-pipe shell, 2-end plate, 3-pressure rod, 4-pressure head, 5-upper limiting plate, 6-lower limiting plate, 601-round plate, 602-slide hole, 603-lower annular positioning groove, 7-spring body, 701-spiral spring, 702-upper positioning ring, 703-lower positioning ring and 8-limiting nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Example one
Referring to fig. 1-4, the present embodiment is a disposable blood lancet spring, which includes a tube case 1, an end plate 2, a pressing rod 3, a pressing head 4, an upper limiting plate 5, a lower limiting plate 6, a spring body 7 and a limiting nut 8. The upper end of the pipe shell 1 is provided with an end plate 2, and the inside of the pipe shell 1 is provided with a lower limiting plate 6. The end plate 2 and the lower limiting plate 6 are provided with a pressure lever 3 in a penetrating way. The end part of the rod body of the pressure rod 3, which is positioned at the outer side of the end plate 2, is fixed with a pressure head 4, and the rod body positioned in the end plate 2 is fixed with an upper limiting plate 5. A spring body 7 is arranged between the upper limiting plate 5 and the lower limiting plate 6. The rod body of the pressure lever 3 below the lower limiting plate 6 is provided with a limiting nut 8.
In this embodiment, the spring body 7 is composed of a coil spring 701, an upper positioning ring 702 welded to the upper end thereof, and a lower positioning ring 702 welded to the lower end thereof, an upper annular positioning groove matched with the upper positioning ring 702 is formed in the inner side of the upper positioning plate 5, and a lower annular positioning groove 603 matched with the lower positioning ring is formed in the inner side of the lower positioning plate 6.
In this embodiment, a three-ring spring body 7 is installed between the upper and lower limiting plates 5 and 6. The outer diameters of the upper positioning ring 702 and the lower positioning ring 703 in the same spring body 7 are equal, and the spiral spring 701 is a cylindrical spiral spring.
In this embodiment, the outer diameters of the upper and lower limiting plates 5 and 6 are the same. The lower limiting plate 6 comprises a circular plate 601, and a sliding hole 602 matched with the compression bar 3 is formed in the center of the circular plate 601.
One specific application of this embodiment is: the structure of the embodiment is reasonable in design, and the multi-circle concentric spring body 7 is combined for use, so that the fatigue resistance can be greatly improved compared with a single-circle spring; through set up annular positioning groove respectively in the inboard of last limiting plate 5, lower limiting plate 6, the both ends holding ring of the spring body is gone into respectively in the corresponding annular positioning groove, can avoid the appearance of skew condition, the effect that resets when the guarantee blood sampling.
Example two
The structure and application of this embodiment are substantially the same as those of the first embodiment, except that the outer diameters of the upper positioning ring 702 and the lower positioning ring 703 in the same spring body 7 are different, and the coil spring 701 is a variable diameter coil spring.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best understand the invention and its practical application. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. Disposable blood taking needle spring, its characterized in that: the pipe comprises a pipe shell, an end plate, a pressing rod, a pressing head, an upper limiting plate, a lower limiting plate, a spring body and a limiting nut, wherein the end plate is arranged at the upper end of the pipe shell, the lower limiting plate is arranged inside the pipe shell, the pressing rod penetrates through the end plate and the lower limiting plate, the pressing head is fixed at the end part of a rod body of the pressing rod, which is positioned outside the end plate, the upper limiting plate is fixed at the rod body positioned in the end plate, at least two circles of spring bodies are arranged between the upper limiting plate and the lower limiting plate, and the limiting nut is arranged on the rod body of the pressing rod, which is positioned below the lower limiting plate; the spring body comprises a spiral spring, an upper positioning ring welded at the upper end of the spiral spring and a lower positioning ring welded at the lower end of the spiral spring, wherein the inner side of the upper positioning plate is provided with an upper annular positioning groove matched with the upper positioning ring, and the inner side of the lower positioning plate is provided with a lower annular positioning groove matched with the lower positioning ring.
2. The disposable lancet spring according to claim 1, wherein: and a three-ring spring body is arranged between the upper limiting plate and the lower limiting plate.
3. The disposable lancet spring according to claim 1, wherein: the outer diameters of the upper positioning ring and the lower positioning ring in the same spring body are equal or unequal.
4. The disposable lancet spring according to claim 3, wherein: the outer diameters of the upper positioning ring and the lower positioning ring are equal, and the spiral spring is a cylindrical spiral spring; the outer diameters of the upper positioning ring and the lower positioning ring are different, and the spiral spring is a reducing spiral spring.
5. The disposable lancet spring according to claim 1, wherein: the outer diameters of the upper limiting plate and the lower limiting plate are the same.
6. The disposable lancet spring according to claim 1, wherein: the lower limiting plate comprises a circular plate, and a sliding hole matched with the pressing rod is formed in the center of the circular plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221538890.8U CN217793066U (en) | 2022-06-20 | 2022-06-20 | Disposable blood taking needle spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221538890.8U CN217793066U (en) | 2022-06-20 | 2022-06-20 | Disposable blood taking needle spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217793066U true CN217793066U (en) | 2022-11-15 |
Family
ID=83992934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221538890.8U Expired - Fee Related CN217793066U (en) | 2022-06-20 | 2022-06-20 | Disposable blood taking needle spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217793066U (en) |
-
2022
- 2022-06-20 CN CN202221538890.8U patent/CN217793066U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |