CN108514422B - Blood sampling pen with needle unloading protection - Google Patents
Blood sampling pen with needle unloading protection Download PDFInfo
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- CN108514422B CN108514422B CN201810492946.2A CN201810492946A CN108514422B CN 108514422 B CN108514422 B CN 108514422B CN 201810492946 A CN201810492946 A CN 201810492946A CN 108514422 B CN108514422 B CN 108514422B
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- 238000010241 blood sampling Methods 0.000 title claims abstract description 65
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract 10
- 238000002347 injection Methods 0.000 claims description 25
- 239000007924 injection Substances 0.000 claims description 25
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 241000180587 Pinnidae Species 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 6
- 238000013459 approach Methods 0.000 abstract description 2
- 239000008280 blood Substances 0.000 description 15
- 210000004369 blood Anatomy 0.000 description 15
- 238000012360 testing method Methods 0.000 description 10
- 238000010304 firing Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
- A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15134—Bladeless capillary blood sampling devices, i.e. devices for perforating the skin in order to obtain a blood sample but not using a blade, needle, canula, or lancet, e.g. by laser perforation, suction or pressurized fluids
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dermatology (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model provides a take blood sampling pen of needle protection of unloading, includes pen cap, cap seat, shooting rod and unloads needle bar, its characterized in that: a protective bolt is fixedly arranged beside the needle unloading rod, a protective channel (20) is arranged on the cap seat corresponding to the protective bolt, and a blocking surface is arranged on the pen cap corresponding to the protective bolt; in the initial assembly state, the protective bolt on the needle-unloading rod is seated in the protective channel of the cap seat, and the head of the protective bolt approaches or abuts against the blocking surface (23) of the pen cap. According to the design, only the pen cap is arranged on the cap seat, the blocking surface on the pen cap closes the path of the protection bolt sliding forwards along the protection channel, so that the needle unloading rod cannot move forwards relative to the needle seat to unload the needle, and only after the pen cap is removed from the cap seat, the path of the protection bolt moving forwards in the protection channel is opened, so that the needle unloading rod can perform needle unloading movement. The utility model improves the reliability and the operation performance of the blood sampling pen and solves the problem of needle unloading protection in the prior art.
Description
Technical Field
The utility model relates to a medical blood taking instrument, in particular to a blood taking pen matched with a disposable blood taking needle. The blood sampling pen can be used for discharging the needle only under the condition of discharging the pen cap, so that inconvenience caused by misoperation in the past is avoided, and the use reliability of the blood sampling pen is improved.
Background
The blood sampling pen is a blood sampling device matched with a disposable blood sampling needle, wherein the blood sampling pen can be reused, and the blood sampling needle is only disposable in order to avoid cross infection. The development of the blood sampling pen has been several decades old, wherein the improvement of the blood sampling pen also goes through a plurality of stages, and the blood sampling pen is gradually matured at present, but in the development process of the blood sampling pen, how to improve the convenience and reliability of the operation of the blood sampling pen and avoid misoperation is always a concern of the person skilled in the art.
Chinese patent CN205083489U announces that a patent number is 2015174270. X, and the name is "a needle-retractable painless blood sampling pen". This patent, while providing beneficial improvements in improving ejection speed and reducing the sensation of stinging, provides positive results. There are significant disadvantages in terms of convenience and reliability of operation. For example, the needle unloading mechanism of the blood sampling pen is not provided with a protection device, and the needle can be unloaded by the needle unloading rod after the blood sampling pen is installed no matter before or after the blood sampling pen is used, so that great inconvenience is brought once misoperation is generated before the blood sampling pen is used. Moreover, the blood sampling pen can not automatically reset by utilizing the needle unloading rod to push the needle unloading rod, and the needle unloading rod needs to be manually pulled back, so that inconvenience is brought to operation. For a long time, for a repeatedly used blood sampling pen, the mounting of the blood sampling needle by removing the pen cap and the pressing emission are habitually regulated actions in use, and the reliability and the operation performance of the blood sampling pen can be reflected by the needle removing operation in use.
Therefore, it is the subject of the present utility model to develop how to improve the reliability and the operability of the lancet according to the above-mentioned conventional art.
Disclosure of Invention
The utility model provides a blood sampling pen with a needle unloading protection function, which aims to improve the reliability and the operation performance of the blood sampling pen and solve the problems pointed out in the background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a blood sampling pen with needle unloading protection comprises a pen cap, a cap seat, a shooting rod and a needle unloading rod.
The pen cap is a pen head of the blood sampling pen.
The cap seat is a part which is used for being matched with the pen cap in the pen body of the blood sampling pen, the pen cap is connected with the cap seat through a detachable fixing structure, and an ejection channel is arranged in the center of the cap seat.
The injection rod is a part used for emitting in the pen body of the blood sampling pen, the head of the injection rod is provided with a needle seat used for inserting the disposable blood sampling needle, and the injection rod is positioned in the ejection channel of the cap seat.
The needle unloading rod is a part for unloading a part in the pen body of the blood sampling pen, and the head part of the needle unloading rod is provided with a section of ejector rod for unloading a needle.
The innovation is that: the needle unloading rod is provided with a protection bolt for needle unloading protection, the protection bolt is in a rod piece structure and is arranged in parallel with the ejector rod, the protection bolt and the needle unloading rod are integrally formed or connected into a whole, and the protection bolt or the needle unloading rod is provided with an abutting surface for limiting the sliding position of the front end of the protection bolt or the needle unloading rod.
The cap seat is provided with a protection channel corresponding to the protection bolt, and the cap seat or the blood sampling pen shell fixedly connected with the cap seat is provided with a limiting surface corresponding to the abutting surface.
The pen cap is provided with a blocking surface corresponding to the protection bolt.
In the initial assembly state, the pen cap is arranged on the cap seat, the injection rod is arranged in the ejection channel of the cap seat, and the needle unloading rod is arranged on the injection rod and is in sliding fit with the injection rod in the axial direction; the protection bolt on the needle unloading rod is arranged in the protection channel of the cap seat, the head of the protection bolt is close to or props against the blocking surface of the pen cap, the limiting surface on the cap seat is positioned on the sliding path in front of the propping surface, and the needle seat is positioned on the sliding path in front of the ejector rod.
The content of the present utility model is explained as follows:
1. in the above-mentioned embodiments, the meaning of "front end" and "front" means the direction in which the pen tip of the lancet is pointed or the shooting direction of the lancet. The meaning of the term "rear" in the "rear end" means the direction pointed by the pen tail of the blood sampling pen or the direction opposite to the shooting direction of the blood sampling needle.
2. In the present utility model, the "axial direction" refers to the axial direction of the blood collection pen, and is also the radial direction of the line between the pen tip and the pen tail of the blood collection pen, or the front-back direction.
3. In the scheme, the injection rod is provided with the spring groove, the spring groove is internally provided with the needle unloading reset spring, the ejector rod is positioned in the spring groove, the needle unloading reset spring is sleeved on the ejector rod, the front end of the needle unloading reset spring is propped against the injection rod entity, and the rear end of the needle unloading reset spring is propped against the needle unloading rod entity.
4. In the scheme, the blood sampling pen comprises a tail handle, a guide pillar is arranged on the tail handle, and the guide pillar (27) is propped against the rear end of the needle unloading rod.
The design principle and the technical conception of the utility model are as follows: in order to improve the reliability and the operation performance of the blood sampling pen and solve the problem of needle unloading protection pointed out in the background art, the utility model designs a protection bolt which is integrally connected with the needle unloading rod beside the needle unloading rod, a protection channel is arranged on a cap seat corresponding to the protection bolt, and then a blocking surface is arranged on the pen cap corresponding to the protection bolt. In the initial assembly state, the protecting bolt on the needle unloading rod is placed in the protecting channel of the cap seat, and the head of the protecting bolt is close to or propped against the blocking surface of the pen cap. According to the design, only the pen cap is arranged on the cap seat, the blocking surface on the pen cap closes the path of the protection bolt sliding forwards along the protection channel, so that the needle unloading rod cannot move forwards relative to the needle seat to unload the needle, and only after the pen cap is removed from the cap seat, the path of the protection bolt moving forwards in the protection channel is opened, so that the needle unloading rod can perform needle unloading movement.
Due to the application of the scheme, compared with the prior art, the utility model has the following advantages and effects:
1. the utility model specially designs a protection structure aiming at the needle unloading mechanism, the blood sampling pen cannot be subjected to needle unloading operation in a state of installing the pen cap, and the needle unloading can be performed only in a state of unloading the pen cap, so that the inconvenience caused by misoperation in the past is avoided, the use reliability and the operation performance of the blood sampling pen are improved, and the problem that the prior art lacks needle unloading protection is solved.
2. The needle unloading device is specially provided with the needle unloading reset spring aiming at the needle unloading rod, and the needle unloading rod can automatically reset by using the needle unloading reset spring after needle unloading, so that the problem that the manual pulling back is needed in the prior art and inconvenience is brought to operation is solved.
3. The utility model fully considers the use habit of a user, and besides the specified actions such as removing the pen cap, installing the blood taking needle, pressing and transmitting, the operation actions are reduced as much as possible, thereby improving the reliability and the operation performance of the blood taking pen.
4. The utility model is suitable for various blood sampling pens, has reasonable structural design and ingenious conception, has outstanding substantive characteristics and remarkable progress, and plays a positive role in improving and developing the blood sampling pen.
Drawings
FIG. 1 is an exploded perspective view of an embodiment of the lancing pen of the present utility model;
FIG. 2 is a perspective view of a cap of an embodiment of the lancing pen according to the present utility model;
FIG. 3 is a perspective cross-sectional view of a cap of an embodiment of the lancing pen of the present utility model;
FIG. 4 is a perspective view of another view of the cap of the lancet embodiment of the present utility model;
FIG. 5 is a perspective view of a cap of an embodiment of the lancing pen of the present utility model;
FIG. 6 is a perspective view of a test plug of an embodiment of the lancing pen of the present utility model;
FIG. 7 is another perspective view of an alternate view of a test plug according to an embodiment of the lancing device of the present utility model;
FIG. 8 is a perspective view of an injection rod of an embodiment of the lancing pen of the present utility model;
FIG. 9 is another perspective view of the ejection rod of the lancing device according to the present utility model;
FIG. 10 is a perspective view of a combination of a lance and a test plug in accordance with an embodiment of the lancing device of the present utility model;
FIG. 11 is a perspective view of a needle-removing rod of an embodiment of the lancing device according to the present utility model;
FIG. 12 is a perspective view of an emission button of an embodiment of the lancing pen of the present utility model;
FIG. 13 is another perspective view of an embodiment of a firing button of the lancing pen of the present utility model;
FIG. 14 is a perspective view of the inner sleeve of an embodiment of the lancing pen of the present utility model;
FIG. 15 is a perspective view of a rear handle of an embodiment of the lancing pen of the present utility model;
FIG. 16 is a view showing an initial assembly state of an embodiment of the lancet of the present utility model;
FIG. 17 is a state diagram showing the loading of a lancet according to an embodiment of the lancet of the present utility model;
FIG. 18 is a view showing the state of the needle insertion and loading of the blood sampling pen according to the embodiment of the present utility model;
FIG. 19 is a diagram showing a state of pressing and transmitting the blood sampling pen according to the embodiment of the present utility model;
FIG. 20 is a view showing the needle-removing protection state of the blood sampling pen according to the embodiment of the present utility model;
FIG. 21 is a view showing the state of needle removal of the blood collection pen according to the embodiment of the present utility model;
FIG. 22 is a diagram showing a reset state of the needle bar and the tail handle of the lancet according to the embodiment of the present utility model.
In the above figures: 1. a cap; 2. a cap base; 3. a shooting rod; 4. a needle-unloading reset spring; 5. a test plug; 6. a needle bar is unloaded; 7. a transmit button; 8. a housing; 9. adjusting the inner sleeve; 10. a firing spring; 11. an adjusting ring; 12. a shooting rod reset spring; 13. a handle return spring; 14. an inner sleeve; 15. a tail handle; 16. a blood taking needle; 17. a needle stand; 18. a buckle; 19. a clamping hook; 20. protecting the channel; 21. a bump; an l-shaped slot; 23. a blocking surface; 24. a spring groove; 25. a protection bolt; 26. a push rod; 27. a guide post; 28. a limiting surface; 29. an abutment surface.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings and examples:
examples: blood sampling pen with needle unloading protection
As shown in fig. 1-15, the blood sampling pen is a blood sampling pen with the puncture depth adjusted in a rear mode, and comprises a pen cap 1, a cap seat 2, a shooting rod 3, a needle unloading reset spring 4, a test bolt 5, a needle unloading rod 6, a shooting button 7, a shell 8, an adjusting inner sleeve 9, a shooting spring 10, an adjusting ring 11, a shooting rod reset spring 12, a handle reset spring 13, an inner sleeve 14 and a tail handle 15 (see fig. 1).
The pen cap 1 is a cap of the head of the blood sampling pen (see fig. 5), and the front end of the pen cap 1 is provided with a blood sampling end face for contacting with the blood sampling part of a human body. The cap seat 2 is a seat body (see fig. 2, 3 and 4) at the front part of the blood sampling pen for being connected and matched with the pen cap 1, the pen cap 1 and the cap seat 2 are connected through a detachable fixing structure, and an ejection channel is arranged in the center of the cap seat 2. The detachable fixing structure is specifically an insertion torsion structure, i.e. an L-shaped groove 22 (see fig. 5) is arranged on the pen cap 1, a protruding block 21 (see fig. 2) is arranged on the cap base 2, and when the pen cap 1 and the cap base 2 are inserted and twisted, the protruding block 21 and the L-shaped groove 22 cooperate to form a locking structure. The injection rod 3 is an emission part of a blood sampling pen (see fig. 8-10), the head of the injection rod 3 is provided with a needle seat 17 for inserting a disposable blood sampling needle 16, and the injection rod 3 is positioned in an ejection channel of the cap seat 2. The test plug 5 is a structure (see fig. 6 and 7) for confirming whether the lancet is put in place in the lancet pen, and the test plug 5 is slidably connected with the injection rod 3. The needle unloading rod 6 is a part (see fig. 11) of the blood sampling pen for unloading, and the head of the needle unloading rod 6 is provided with a section of ejector rod 26 for unloading needles. The shell 8 is fixedly connected with the cap seat 2. The firing button 7 is mounted on the housing 8, the firing button 7 being provided directly with a catch 18 (fig. 13), the catch 18 being used for loading the locking injection rod 3. The firing spring 10 acts on the shooting rod 3 as a power element for shooting and puncturing of the blood collection pen. The shooting bar return spring 12 acts on the shooting bar 3 to force the shooting bar 3 to automatically return after shooting puncture. The inner sleeve 14 is fixedly sleeved with the tail handle 15 and is used for loading and unloading the needle (pushing the needle unloading rod 6 to unload the needle) of the injection rod 3. The handle return spring 13 acts on the tail handle 15 for return. The adjusting inner sleeve 9 and the adjusting ring 11 are matched with the injection rod 3 to form a puncture depth rear adjusting structure (see Chinese patent CN 107854129A).
The utility model has the innovation that the needle unloading protection structure is specially designed in the blood sampling pen, the needle unloading operation of the needle unloading protection structure cannot be carried out under the state of installing the pen cap, and the needle unloading can be carried out only under the state of unloading the pen cap, thereby avoiding the inconvenience caused by misoperation in the past. The specific contents of the needle unloading protection structure are as follows:
a protecting bolt 25 (see fig. 11) for protecting the needle is arranged beside the needle unloading rod 6, the protecting bolt 25 is in a rod structure and is arranged in parallel with the ejector rod 26, the protecting bolt 25 and the needle unloading rod 6 are integrally formed (or connected into a whole), and an abutting surface 29 (see fig. 11) for limiting the sliding position of the front end of the protecting bolt 25 or the needle unloading rod 6 is arranged on the protecting bolt 25 or the needle unloading rod 6.
The cap 2 is provided with a protection channel 20 (see fig. 2-4) corresponding to the protection bolt 25, and the cap 2 is provided with a limit surface 28 (see fig. 4) corresponding to the abutting surface 29. The cap 1 is provided with a blocking surface 23 (see fig. 5) corresponding to the guard pin 25.
In the initial assembly state (see fig. 16), the pen cap 1 is mounted on the cap holder 2, the ejection rod 3 is seated in the ejection channel of the cap holder 2, and the needle-unloading rod 6 is mounted on the ejection rod 3 and is axially slidably fitted with respect to the ejection rod 3. The guard bolt 25 on the needle unloading rod 6 is located in the guard channel 20 of the cap seat 2, the head of the guard bolt 25 is close to or props against the blocking surface 23 of the pen cap 1, the limiting surface 28 on the cap seat 2 is located on the sliding path in front of the propping surface 29, and the needle seat 17 is located on the sliding path in front of the ejector rod 26.
The ejector pin 3 is provided with a spring groove 24, the spring groove 24 is internally provided with a needle unloading reset spring 4, the ejector pin 26 is positioned in the spring groove 24, the needle unloading reset spring 4 is sleeved on the ejector pin 26, the front end of the needle unloading reset spring 4 is propped against the entity of the ejector pin 3, and the rear end is propped against the entity of the needle unloading rod 6. The tail handle 15 is provided with a guide post 27, and the guide post 27 is abutted against the rear end of the needle unloading rod 6.
In order to better understand the relative positions and relationships between the components in the present utility model, the following describes the blood sampling pen according to the present utility model in connection with the usage state:
1. initial assembled state
FIG. 16 is a view showing an initial assembly state of the lancet embodiment of the present utility model. The relative positions and relationships between the components in the initial assembled state can be seen in fig. 16. For example, the catch 18 on the firing button 7 is disengaged from the catch 19 on the test bolt 5, indicating that the injection rod 3 is in the unlocked state. The needle-unloading rod 6 is installed on the shooting rod 3 and is in sliding fit with the shooting rod 3 in the axial direction. The guard pin 25 on the needle-removing rod 6 is seated in the guard channel 20 of the cap 2, and the head of the guard pin 25 approaches or abuts against the blocking surface 23 of the pen cap 1. The guide post 27 on the tail handle 15 abuts against the rear end of the needle bar 6. In this state, since the blocking surface 23 on the cap 1 closes the path along which the guard pin 25 slides forward along the guard channel 20, the needle-discharging lever 6 cannot move forward with respect to the needle holder 17 for needle-discharging.
2. Needle-like state
FIG. 17 is a view showing a state in which the lancet is mounted in the lancet according to the embodiment of the present utility model. The relative positions and relationships between the components in the needle-like state can be seen in fig. 17. The lancet 16 is mounted on the needle holder 17 on the incidence rod 3.
3. Needle loading state
FIG. 18 is a view showing a state of needle insertion and loading in accordance with the embodiment of the lancet of the present utility model. In this state, the relative positions and relationships between the respective components can be seen from fig. 18. The blood taking needle 16 is continuously inserted, and the clamping hook 19 at the top of the test bolt 5 is locked with the bottom clamping buckle 18 by crossing the bottom inclined plane of the emission button 7, so that the test bolt is successfully loaded.
4. Push-to-fire state
FIG. 19 is a diagram showing a state of the pressing and firing of the lancet embodiment of the present utility model. In this state, the relative positions and relationships between the respective components can be seen from fig. 19. Pressing the launching button 7 forces the buckle 18 to be unhooked and unlocked with the clamping hook 19, and under the action of the launching spring 10, the shooting rod 3 drives the blood taking needle 16 to shoot and puncture, so that blood taking is completed. Note that in this condition, particularly prior to blood collection, the needle removal bar 6 cannot be moved forward relative to the needle mount 17 for needle removal, as the blocking surface 23 on the cap 1 closes the path of the forward sliding of the guard pin 25 along the guard channel 20. I.e. the needle-removing operation cannot be performed in the mounted state of the pen cap 1.
5. Needle-unloading protection state
FIG. 20 is a view showing a needle-removing protection state of the lancet according to the embodiment of the present utility model. In this state, the relative positions and relationships between the respective components can be seen from fig. 20. After the above-mentioned push-to-fire state, the injection rod 3 is reset, and in this state, the blocking surface 23 on the pen cap 1 closes the path along which the protection bolt 25 slides forward along the protection channel 20, so that the needle unloading rod 6 cannot move forward relative to the needle seat 17 to unload a needle. I.e. the needle-removing operation cannot be performed in the mounted state of the pen cap 1.
6. Needle-unloading state
FIG. 21 is a view showing a needle-removing state of the lancet according to the embodiment of the present utility model. In this state, the relative positions and relationships between the respective components can be seen from fig. 21. When the cap 1 is removed from the cap holder 2, the path of forward movement of the guard pin 25 in the guard channel 20 is opened and the needle-removing lever 6 is allowed to perform the needle-removing movement. At this time, the tail handle 15 is pushed forward, the needle unloading rod 6 is pushed to move leftwards by the guide post 27 until the abutting surface 29 on the needle unloading rod 6 is contacted with the limiting surface 28 on the cap seat 2, the needle unloading rod 6 stops moving, and the blood taking needle 16 is not clamped by the needle seat 17 and falls off freely.
7. Reset state of needle unloading rod and tail handle
FIG. 22 is a view showing a reset state of the needle bar and the tail handle of the lancet embodiment of the present utility model. In this state, the relative positions and relationships between the respective components can be seen from fig. 22. The needle unloading rod 6 moves rightwards to automatically reset under the action of the needle unloading reset spring, the tail handle 15 pulls the reset spring 13 and drives the injection rod 3 to move rightwards to automatically reset, and the state is restored to the initial state (the difference from the initial assembly state is that the pen cap 1 is unloaded).
With respect to the above embodiments, the possible variations of the utility model are described as follows:
1. in the above embodiment, the insertion torsion structure between the pen cap 1 and the cap base 2 is specifically: the pen cap 1 is provided with an L-shaped groove 22, and the cap seat 2 is provided with a convex block 21. The present utility model is not limited thereto, and the L-shaped groove 22 may be formed in the cap 2, and the projection 21 may be formed in the cap 1. As will be readily appreciated by those skilled in the art.
2. In the above embodiments, the detachable fixing structure between the pen cap 1 and the cap base 2 is an insertion torsion structure. The present utility model is not limited to this, and may be a screw connection structure or an insertion snap fit structure. As will be readily appreciated by those skilled in the art.
3. In the above embodiment, the cap 2 is provided with a limiting surface 28 (see fig. 4) corresponding to the abutting surface 29. However, the present utility model is not limited thereto, and the stopper surface 28 may be formed on the lancet case fixedly connected to the cap 2.
4. In the above embodiments, the principle, structure and effect of the present utility model are described by taking a lancing pen with a post-adjustment of lancing depth as an example. The present utility model is not limited thereto, and may be applied to a front-head impact-adjusted lancet, even a lancet having an unadjustable penetration depth, as will be appreciated by those skilled in the art.
The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.
Claims (6)
1. The blood sampling pen with the needle unloading protection comprises a pen cap (1), a cap seat (2), a shooting rod (3) and a needle unloading rod (6);
the pen cap (1) is a pen head of a blood sampling pen;
the cap seat (2) is a part which is used for being matched with the pen cap (1) in the pen body of the blood sampling pen, the pen cap (1) is connected with the cap seat (2) through a detachable fixing structure, and an ejection channel is arranged in the center of the cap seat (2);
the injection rod (3) is a part used for emitting in the body of the blood sampling pen, the head of the injection rod (3) is provided with a needle seat (17) used for inserting the disposable blood sampling needle (16), and the injection rod (3) is positioned in an ejection channel of the cap seat (2);
the needle unloading rod (6) is a part for unloading a part in the body of the blood sampling pen, and the head part of the needle unloading rod (6) is provided with a section of ejector rod (26) for unloading a needle;
the method is characterized in that: a protection bolt (25) for needle unloading protection is arranged beside the needle unloading rod (6), the protection bolt (25) is of a rod piece structure and is arranged in parallel with the ejector rod (26), the protection bolt (25) and the needle unloading rod (6) are integrally formed or connected into a whole, and an abutting surface (29) for limiting the sliding position of the front end of the protection bolt (25) or the needle unloading rod (6) is arranged on the protection bolt;
a protection channel (20) is arranged on the cap seat (2) corresponding to the protection bolt (25), and a limit surface (28) is arranged on the cap seat (2) or a blood sampling pen shell fixedly connected with the cap seat (2) corresponding to the abutting surface (29);
a blocking surface (23) is arranged on the pen cap (1) corresponding to the protection bolt (25);
in the initial assembly state, the pen cap (1) is arranged on the cap seat (2), the injection rod (3) is arranged in an ejection channel of the cap seat (2), and the needle unloading rod (6) is arranged on the injection rod (3) and is in sliding fit with the injection rod (3) in the axial direction; the protective bolt (25) on the needle unloading rod (6) is located in the protective channel (20) of the cap seat (2), the head of the protective bolt (25) is close to or props against the blocking surface (23) of the pen cap (1), the limiting surface (28) on the cap seat (2) is located on the sliding path in front of the propping surface (29), and the needle seat (17) is located on the sliding path in front of the ejector rod (26).
2. The lancing pen of claim 1, wherein: the ejector pin is characterized in that a spring groove (24) is formed in the ejector pin (3), a needle unloading reset spring (4) is arranged in the spring groove (24), the ejector pin (26) is arranged in the spring groove (24), the needle unloading reset spring (4) is sleeved on the ejector pin (26), the front end of the needle unloading reset spring (4) is propped against the entity of the ejector pin (3), and the rear end of the needle unloading reset spring is propped against the entity of the needle unloading rod (6).
3. The lancing pen of claim 2, wherein: the blood sampling pen comprises a tail handle (15), a guide pillar (27) is arranged on the tail handle (15), and the guide pillar (27) is propped against the rear end of the needle unloading rod (6).
4. The lancing pen of claim 1, wherein: the detachable fixing structure is an insertion torsion structure, namely, an L-shaped groove (22) is formed in one of the pen cap (1) and the cap seat (2), a lug (21) is formed in the other one, and when the pen cap (1) and the cap seat (2) are inserted and twisted, the lug (21) and the L-shaped groove (22) are matched to form a locking structure.
5. The lancing pen of claim 1, wherein: the detachable fixing structure is a threaded connection structure.
6. The lancing pen of claim 1, wherein: the detachable fixing structure is an inserting clamping matching structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492946.2A CN108514422B (en) | 2018-05-22 | 2018-05-22 | Blood sampling pen with needle unloading protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810492946.2A CN108514422B (en) | 2018-05-22 | 2018-05-22 | Blood sampling pen with needle unloading protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108514422A CN108514422A (en) | 2018-09-11 |
| CN108514422B true CN108514422B (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810492946.2A Active CN108514422B (en) | 2018-05-22 | 2018-05-22 | Blood sampling pen with needle unloading protection |
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| Country | Link |
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| CN (1) | CN108514422B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141250B (en) * | 2019-05-28 | 2024-04-02 | 苏州施莱医疗器械有限公司 | Needle-type blood sampling pen without removing cap and with needle removing protection |
| CN111214245B (en) * | 2019-09-18 | 2022-09-06 | 天津华鸿科技股份有限公司 | Blood sampling pen |
| CN111419240B (en) * | 2020-04-21 | 2021-10-08 | 苏州施莱医疗器械有限公司 | Blood sampling pen convenient to needle-prick cap is unloaded |
| CN113598766B (en) * | 2021-07-27 | 2023-03-14 | 天津云帆医疗器械有限公司 | Blood sampling pen |
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| CN102802704A (en) * | 2009-06-12 | 2012-11-28 | 诺沃—诺迪斯克有限公司 | Drug delivery device with cap functions for needle assembly |
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| Publication number | Publication date |
|---|---|
| CN108514422A (en) | 2018-09-11 |
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