CN110141250B - Needle-type blood sampling pen without removing cap and with needle removing protection - Google Patents
Needle-type blood sampling pen without removing cap and with needle removing protection Download PDFInfo
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- CN110141250B CN110141250B CN201910449421.5A CN201910449421A CN110141250B CN 110141250 B CN110141250 B CN 110141250B CN 201910449421 A CN201910449421 A CN 201910449421A CN 110141250 B CN110141250 B CN 110141250B
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- 238000010241 blood sampling Methods 0.000 title claims abstract description 52
- 230000000903 blocking effect Effects 0.000 claims abstract description 51
- 239000008280 blood Substances 0.000 claims description 41
- 210000004369 blood Anatomy 0.000 claims description 41
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 230000009471 action Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 8
- 238000007599 discharging Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 206010011409 Cross infection Diseases 0.000 description 2
- 206010029803 Nosocomial infection Diseases 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 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
-
- 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
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150244—Rods for actuating or driving the piston, i.e. the cylindrical body that sits inside the syringe barrel, typically with an air tight seal, and slides in the barrel to create a vacuum or to expel blood
-
- 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
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150541—Breakable protectors, e.g. caps, shields or sleeves, i.e. protectors separated destructively, e.g. by breaking a connecting area
-
- 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
- A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
- A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model provides a exempt from to unload cap loading and unloading needle blood sampling pen with unload needle protection, includes shooting rod, unloads needle bar, pen cap and pen body, its characterized in that: a safety bolt is designed on the needle unloading rod, a protection channel is arranged on the cap seat corresponding to the safety bolt, the safety bolt is arranged in the protection channel, then a blocking block is designed on the pen cap, the pen cap is rotationally positioned and connected with the pen body, when the blocking block rotates to the front position of the safety bolt along with the pen cap, the needle unloading rod is blocked from moving forward to unload the needle, when the blocking block rotates to the position beyond the front position of the safety bolt along with the pen cap, the needle unloading rod is opened to move forward to unload the needle, so that the needle unloading protection state can be controlled by rotating the angle of the pen cap relative to the pen body, and the use safety is ensured. The scheme solves the problem of potential safety hazard caused by that the needle is not limited by the pen cap when the cap is not detached from the blood sampling pen.
Description
Technical Field
The invention relates to a medical blood taking instrument, in particular to a blood taking pen matched with a disposable blood taking needle. The blood taking pen can be used for loading and unloading the blood taking needle without removing the pen cap, has the needle unloading safety protection function, and avoids the safety problem caused by misoperation in the past.
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 in decades, wherein the improvement of the blood sampling pen also goes through a plurality of stages, and the development of the blood sampling pen is gradually matured, but in the development process of the blood sampling pen, how to improve the convenience of the operation of the blood sampling pen and the use safety of the blood sampling pen is always a major concern for the person skilled in the art.
In the field of blood sampling pens, the use of removable cap designs is a typical structure for such products. The purpose of the structural design is just to facilitate the replacement of the disposable blood taking needle, and the requirement that the blood taking pen can be reused and the blood taking needle can be used once is met. Therefore, the blood collection pen product with the detachable pen cap structure in the blood collection pen field has almost monopoly for a long time. With the development of the technology of the blood sampling pen, the skilled person realizes that the existing blood sampling pen with the detachable pen cap structure has more operation steps in use, thereby bringing inconvenience to use. Therefore, it is desirable to design a lancet pen that can be assembled and disassembled without removing the cap, so as to break the conventional monopoly for a long time.
On the other hand, the lancet pen has a safety problem in use because the lancet can be attached and detached without removing the cap. For example, after the lancet is inserted into the lancet, the lancet is suddenly interfered by external things to cause the use to be stopped, and the lancet may be in an unoccupied or loaded state at this time, and the needle tip is exposed to damage events and cross infection due to the fact that the needle unloading is not limited by the pen cap, so that safety accidents occur. In particular, some users are not regulated, so that the disposable blood taking needle is carried and reused in a money-saving habit, and potential safety hazards exist if corresponding safety protection measures are not provided.
Therefore, how to design a blood sampling pen with the needle unloading safety protection function on the basis of detaching the cap-free needle unloading is the subject of the research of the invention.
Disclosure of Invention
The invention provides a cap-removing-free needle-type blood collection pen with needle removing protection, which aims to improve the convenience of blood collection pen operation and the use safety and solve the safety problem of the cap-removing-free needle-type blood collection pen.
In order to achieve the above purpose, the invention adopts the following technical scheme: a cap-unloading-free needle-loading and unloading type blood sampling pen with needle unloading protection comprises a shooting rod, a needle unloading rod and a shell.
The injection rod is an emission part of the blood sampling pen, and the head part of the injection rod is provided with a needle seat for inserting the disposable blood sampling needle.
The needle unloading rod is a needle unloading part of the blood sampling pen, and is provided with a needle unloading action surface which is used for pushing and unloading the blood sampling needle arranged on the needle seat.
The shell is formed by connecting a pen cap and a pen body, an ejection cavity is arranged in the pen cap and the pen body, a shooting rod is arranged in the ejection cavity, and a locking structure for locking the shooting rod in a loading way is arranged between the shooting rod and the pen body; the needle unloading rod is arranged on the pen body in a sliding way, wherein the needle unloading acting surface is positioned at the rear part of the needle seat and is positioned on a parallel sliding path of the injection rod.
The innovation is that: the head of the pen cap is provided with a loading and unloading hole which can allow the blood taking needle to pass through, and the loading and unloading hole is opposite to the needle seat of the injection rod head, so that the cap unloading-free needle loading and unloading structure is formed.
The needle unloading rod is provided with a safety bolt, a protection channel is arranged on the pen body corresponding to the safety bolt, and the safety bolt is arranged in the protection channel.
The safety needle is characterized in that a blocking block is arranged on the pen cap aiming at the safety needle, the pen cap and the pen body are rotationally positioned and connected in the circumferential direction of the blood sampling pen, the rotational positioning connection enables the pen cap to have two different corner positioning positions relative to the pen body, and the two different corner positioning positions can be mutually switched, wherein the blocking block arranged on the pen cap is positioned in front of the safety needle arranged on the needle unloading rod in a first corner positioning position state and blocks a path of the safety needle unloading rod for implementing needle unloading along with the forward movement of the needle unloading rod, and the blocking block arranged on the pen cap is positioned on one side of the safety needle unloading rod in a second corner positioning position state and withdraws the safety needle along with the forward movement of the needle unloading rod, so that the needle unloading protection structure is formed.
The content of the present invention is explained as follows:
1. in the present invention, the meaning of "forward", "front" and "front" in "front" refers to the direction in which the tip of the lancet is pointed or the shooting direction of the lancet. The meaning of the "rear", "rear" and "rear" in the "rear end" refers to the direction pointed by the pen tail of the lancet or the opposite direction of the shooting direction of the lancet. The term "head" is synonymous with "front".
2. In the present invention, 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 point and the pen tail of the blood collection pen, or the front-back direction.
3. In the present invention, the "housing" refers to a generic term for a stationary (stationary) part with respect to a movable part such as a radiation rod. In the scheme, the shell consists of a pen cap and a pen body, and the pen cap and the pen body are of a two-body connection structure. The two-body connection structure means that the pen cap can be removed from and installed on the pen body. In the prior art, in order to assemble and disassemble the pen cap of the blood taking needle, the pen cap is required to be taken down from and assembled on the pen body, and the pen cap is not required to be taken down from and assembled on the pen body when the blood taking needle is assembled and disassembled in the scheme, namely, the cap-disassembling-free needle assembling and disassembling is also called.
4. In the invention, the pen cap and the pen body are rotatably and positionally connected in the circumferential direction of the blood sampling pen, and the rotatably and positionally connected pen cap and the pen body have two different corner positioning positions. The meaning is as follows: no matter how many positioning positions are arranged in the circumferential direction relative to the pen body, but the positioning positions are only of two different types, wherein the first type is blocking of a channel, and the first type is also called "occupying space"; the second type is evacuation channels, also known as "give way". So that it is not important how the two different types of positioning positions are arranged in the circumferential direction.
5. In the invention, the blocking block is arranged on the inner side surface of the pen cap barrel, or is optimally arranged at the rear end of the pen cap barrel, and the outer side of the pen cap barrel can also be used. The blocking block is provided with a blocking surface which faces to the rear of the pen cap.
6. In the present invention, the safety pin is a branched structure extending from the main body of the needle bar. The branch structure can be L-shaped or other shapes. The L-shaped main body section is parallel to the axis of the main body rod of the needle unloading rod, and the L-shaped connecting section is connected with the main body rod of the needle unloading rod into a whole.
7. In the invention, a limit surface is arranged on the injection rod for facilitating needle unloading, a blocking surface is arranged on the inner side of the pen cap cylinder corresponding to the limit surface, and in a needle unloading state, the needle unloading action surface of the needle unloading rod abuts against the blood taking needle, and when the needle unloading rod moves forwards, the injection rod and the blood taking needle are driven to move forwards integrally; when the limiting surface of the injection rod is in contact fit with the blocking surface on the pen cap, the injection rod is limited and stops moving forwards, and at the moment, the blood taking needle is forced to be separated from the needle seat and extend out of the loading and unloading hole when the needle unloading rod moves forwards continuously.
The design principle and the technical conception of the invention are as follows: in order to improve the convenience of the operation of the blood sampling pen and the safety of the use, the safety problem of the needle type blood sampling pen without detaching the cap in the background art is solved. The invention designs a safety bolt which is integrally connected with the needle unloading rod on the needle unloading rod, a protection channel is arranged on the cap seat corresponding to the safety bolt, the safety bolt is arranged in the protection channel, then a blocking block is designed on the pen cap, the pen cap is rotationally positioned and connected with the cap seat, when the blocking block rotates to the front position of the safety bolt along with the pen cap, the path of the needle unloading rod which moves forward is blocked, and when the blocking block rotates to the position beyond the front position of the safety bolt along with the pen cap, the path of the needle unloading rod which moves forward is opened, so that the needle unloading protection state can be controlled by rotating the angle of the pen cap relative to the pen body, thereby ensuring the use safety.
Due to the application of the scheme, compared with the prior art, the invention has the following advantages and effects:
1. the needle-unloading safety protection structure is specially designed for the needle-unloading-free blood sampling pen, the blood sampling pen cannot unload needles in a safety protection state, and the needle-unloading can be performed only by rotating the pen cap to a state of allowing needle unloading, so that the safety hidden danger caused by the fact that the needle tip is exposed due to the fact that the needle-unloading-free blood sampling pen is not limited by the pen cap is avoided, and the safety of the blood sampling pen in use operation is improved.
2. The invention fully considers the use habit of users, especially some irregular users, carries and repeatedly uses the disposable blood taking needle for saving money habit, and has potential safety hazard if no corresponding safety protection measures exist.
3. The cap-unloading-free blood sampling pen has the advantages of reasonable structural design and ingenious conception, has outstanding substantive characteristics and remarkable progress, and plays a positive role in improvement and development of the cap-unloading-free blood sampling pen.
Drawings
FIG. 1 is a perspective view of an embodiment of the lancet of the present invention in a needle-off protective state;
FIG. 2 is a cross-sectional view of an embodiment of the lancet of the present invention in a needle-off protective state;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is a perspective view of an embodiment of the lancing pen of the present invention in a needle-unloaded state;
FIG. 5 is a cross-sectional view of an embodiment of the lancing pen of the present invention in a needle-unloaded state;
FIG. 6 is an enlarged view of a portion of FIG. 4;
FIG. 7 is a perspective view of a cap of an embodiment of the lancing pen of the present invention;
FIG. 8 is a perspective view of a lancet holder of an embodiment of the lancing device of the present invention;
FIG. 9 is a schematic view of a lancet according to an embodiment of the lancet of the present invention without cap removal;
FIG. 10 is a schematic view showing a lancet being continuously inserted without removing a cap according to an embodiment of the lancet of the present invention;
FIG. 11 is a schematic view of an embodiment of a lancet of the present invention;
FIG. 12 is a schematic view showing the completion of needle removal and recovery of the state of the blood collection pen according to the embodiment of the present invention.
In the above figures: 1. a cap; 2. a cap base; 3. a shooting rod; 4. a needle bar is unloaded; 5. a blood taking needle; 6. a needle stand; 7. a transmit button; 8. a housing; 9. a shooting rod reset spring; 10. a firing spring; 11. a needle unloading action surface; 12. a needle-unloading reset spring; 13. a loading and unloading hole; 14. a blocking block; 15. a tail handle; 16. a safety bolt; 17. a blocking surface; 18. a handle return spring; 19. a limiting surface; 20. a blocking surface; 21. a needle cap; an l-shaped slot; 23. a protrusion.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
examples: needle-type blood sampling pen without removing cap and with needle removing protection
As shown in fig. 1 to 8, the blood collection pen comprises parts and structures including a pen cap 1, a cap seat 2, a shooting rod 3, a needle unloading rod 4, a shooting button 7, a shell 8, a shooting rod reset spring 9, a shooting spring 10, a needle unloading reset spring 12, a tail handle 15, a handle reset spring 18 and the like (see fig. 2 and 5).
The pen cap 1 is a sleeve type pen cap of the head of the blood sampling pen, and the front end of the pen cap 1 is provided with a blood sampling end face (see figure 3) for contacting with the blood sampling part of a human body.
The cap seat 2 is a seat body (see fig. 1-3) at the front part of the blood sampling pen for being connected and matched with the pen cap 1, and the pen cap 1 is matched and connected with the cap seat 2 through a connecting port.
The injection rod 3 is an emission part of the blood sampling pen, and the head of the injection rod 3 is provided with a needle seat 6 for inserting the disposable blood sampling needle 5 (see fig. 2 and 5).
The shell 8 is a part of the shell, and the shell 8 and the cap seat 2 are fixedly connected with the pen body. The shell is formed by connecting a pen point and a pen body, wherein the pen point refers to a pen cap 1 part. The pen point and the pen body are provided with ejection cavities, the ejection rod 3 is arranged in the ejection cavities, and a locking structure for loading and locking the ejection rod is arranged between the ejection rod 3 and the shell. The firing button 7 is mounted on the housing 8 (see fig. 2 and 5) for firing the blood collection. The ejector return spring 9 acts on the ejector to force the ejector to automatically return after shooting penetration (see fig. 2 and 5). The firing spring 10 acts on the ejection rod 3 as a power element for the ejection and penetration of the lancet (see fig. 2 and 5). The needle unloading rod 4 is a needle unloading part of a blood sampling pen, the needle unloading rod 4 is provided with a needle unloading action surface 11 (see figure 8), and the needle unloading action surface 11 is used for pushing and unloading the blood sampling needle 5 arranged on the needle seat 6. The needle-removing lever 4 is slidably mounted on the pen body with the needle-removing reaction surface 11 located behind the needle mount 6 and in parallel sliding path of the injection rod 3. The needle-releasing return spring 12 is a spring that acts on the needle-releasing lever 4 to return it after releasing the needle (see fig. 2 and 5). The tail handle 15 is located at the tail of the blood collection pen (see fig. 1 and 2) and is used for loading and unloading the needle (pushing the needle unloading rod 4 to unload the needle). The handle return spring 18 acts on the tail handle 15 for return.
The invention has the innovation of solving the safety problem caused by that the needle-unloading-free needle-type blood sampling pen is not limited by the pen cap due to the fact that the needle is unloaded. To achieve this object, the following improvements are used:
first, a mounting hole 13 (see fig. 2 and 3) through which the lancet 5 can pass is formed in the head of the pen cap 1, and the mounting hole 13 is aligned with the needle seat 6 at the head of the injection rod 3, thereby forming a cap-removing-free mounting needle structure.
Secondly, a safety pin 16 (fig. 3 and 6) is provided on the needle-removing rod 4, a protection channel is provided on the pen body corresponding to the safety pin 16, and the safety pin 16 is arranged in the protection channel.
The safety pin 16 is a branched structure extending from the main body of the needle bar 4 (see fig. 8). The branch structure is L-shaped, the L-shaped main body section is parallel to the main body rod axis of the needle unloading rod 4, and the L-shaped connecting section is connected with the main body rod of the needle unloading rod 4 into a whole.
Third, a blocking block 14 (see fig. 7) is disposed on the pen cap 1 for the safety pin 16, the pen cap 1 and the pen body (cap seat 2) are rotationally positioned and connected in the circumferential direction of the blood sampling pen, the rotationally positioned and connected enables the pen cap 1 to have two different corner positioning positions relative to the pen body, the two different corner positioning positions can be mutually switched, wherein in the state of the first corner positioning position (see fig. 1-3), the blocking block 14 disposed on the pen cap 1 is positioned in front of the safety pin 16 disposed on the needle unloading rod 4, and blocks the path of the safety pin 16 for implementing needle unloading along with the forward movement of the needle unloading rod 4. In the second angular positioning position (see fig. 4-6), the blocking block 14 provided on the pen cap 1 is located at one side of the safety pin 16 provided on the needle unloading rod 4, and the path along which the safety pin 16 moves forward along with the needle unloading rod 4 to perform needle unloading is evacuated, so that the needle unloading protection structure is formed.
In this embodiment, the blocking blocks 14 are provided on the inner side of the barrel of the cap 1 (see fig. 7), the number of blocking blocks 14 being two, the two blocking blocks 14 sharing a safety pin 16. The blocking piece 14 is provided with a blocking surface 17, which blocking surface 17 faces towards the rear of the cap 1.
In this embodiment, in order to realize the rotational positioning connection of the cap 1 and the cap holder 2 in the circumferential direction of the lancing pen, two different rotational positioning positions, namely a first rotational positioning position and a second rotational positioning position, are provided. An L-shaped groove 22 and a protrusion 23 are purposely designed on the inner edge of the barrel of the pen cap 1. The L-shaped groove 22 and the bulge 23 are matched with the bulge or the groove arranged on the outer edge of the cylinder body of the cap seat 2, so that the rotation positioning can be realized.
In addition, in order to facilitate the needle unloading, a limiting surface 19 is further arranged on the injection rod 3, and a blocking surface 20 is arranged on the inner side of the pen cap 1 cylinder corresponding to the limiting surface 19 (see fig. 2 and 3). In the needle-unloading state, the needle-unloading action surface 11 of the needle-unloading rod 4 abuts against the blood taking needle 5, and when the needle-unloading rod 4 moves forward, the injection rod 3 and the blood taking needle 5 are driven to move forward integrally (see fig. 5). When the stop surface 19 of the injection rod 3 is in contact engagement with the stop surface 20 on the cap 1, the injection rod 3 is stopped and moved forward (see fig. 4), at which time the lancet 5 is forced out of the needle holder 6 and out of said loading and unloading hole 13 as the needle unloading rod 4 continues to move forward.
In order to facilitate the insertion of the blood taking needle 5, the needle seat 6 is formed by connecting a front guiding opening and a rear clamping seat, and a movement channel for sliding the needle unloading acting surface 11 along the axis direction of the injection rod 3 is arranged at the rear of the clamping seat.
In order to better understand the relative positions and relationships between the components in the present invention, the following description describes the embodiment of the lancet in combination with the usage status:
1. initial assembled state
Referring to fig. 12, the lancet is in a state of being used, the blocking block 14 on the pen cap 1 is located in front of the safety pin 16, blocks the path of the safety pin 16 for removing the needle along with the forward movement of the needle removing rod 4, and the lancet is in a needle removing protection state.
2. Needle-like state
Referring to fig. 9, in the needle-mounted state, the lancet 5 is inserted into the mounting/dismounting hole 13 at the front end of the lancet.
3. Continuously loading needle-like state
Referring to fig. 10, in the state of continuing to load the needle, the lancet 5 is inserted into the needle holder 6 of the head of the incidence rod 3. The injection rod 3 can be directly locked by the process of inserting the lancet 5 from the front end. But at the time of secondary use, since the lancet 5 is not inserted, the tail grip 15 may be pulled backward to lock the injection rod 3 up.
4. Blood sampling state
The lancing pen is aligned with the lancing site, and the lancing is completed by pressing the firing button 7 (not shown).
5. Needle-unloading state
Referring to fig. 1 and 3, the pen cap 1 is rotated by 30 degrees relative to the pen body, so that the blocking piece 14 on the pen cap 1 is withdrawn from the protection channel and falls on one side of the safety bolt 16, then the tail handle 15 is pressed to drive the needle discharging rod 4 to move forward, then the needle discharging action surface 11 of the needle discharging rod 4 abuts against the blood taking needle 5, and the needle discharging rod 4 drives the injection rod 3 and the blood taking needle 5 to move forward integrally when the needle discharging rod 4 continues to move forward (see fig. 5). When the stop surface 19 of the injection rod 3 is in contact engagement with the stop surface 20 on the pen cap 1, the injection rod 3 is stopped and moved forward (see fig. 4), at which time the lancet 5 is forced to be separated from the needle holder 6 and projected from the loading and unloading hole 13 when the needle unloading rod 4 continues to move forward, and then the tip of the lancet 5 is inserted into the needle cap 21.
6. Needle-unloading completion state
Referring to fig. 11, the lancet needle removal is completed.
7. Restoring the state of being used
Referring to fig. 12, the lancet is restored to the use state at this time.
The following description is made with respect to other embodiments and structural variations of the present invention:
1. in the above embodiment, the blocking blocks 14 are provided on the inner side surface of the barrel of the cap 1 (see fig. 7), and the number is two. However, the present invention is not limited thereto, and the blocking block 14 may be provided at the rear end of the barrel of the cap 1, or outside the barrel, to achieve the same technical effect, as will be readily understood by those skilled in the art.
2. In the above embodiment, the safety pin 16 is a branched structure extending from the main body of the needle bar 4 (see fig. 8), and the branched structure is "L" shaped and integrally connected to the main body of the needle bar 4. However, the present invention is not limited thereto and may not be "L" -shaped. The safety pin 16 is preferably integrally connected with the needle bar 4, but a separate connection structure may be adopted.
3. In the above embodiment, the inner edge of the barrel of the pen cap 1 is designed with the L-shaped groove 22 and the protrusion 23, and the rotation positioning is realized by the mutual matching of the L-shaped groove 22 and the protrusion 23 and the protrusion or the groove arranged on the outer edge of the barrel of the cap seat 2. However, the invention is not limited to this, and other existing design structures can be adopted, wherein a protrusion is arranged on one side between the inner edge and the outer edge, a groove is arranged on the other side, and the protrusion and the groove are matched in the rotation direction to form rotation positioning connection.
4. In the above embodiment, the forward movement of the needle-discharging rod 4 during needle-discharging is performed by pushing the tail handle 15, that is, pushing the tail handle 15 at the tail of the blood-sampling pen, in other words, the tail needle-discharging structure. However, the present invention is not limited to this, and a side needle-removing structure may be adopted, that is, a needle-removing action portion is provided on the side of the lancet, and needle removal is performed by pushing the action portion.
5. In the above embodiment, the cap 1 and the pen body are rotatably positioned and connected in the circumferential direction of the lancing pen, and such rotatably positioned and connected have two different rotational positioning positions. The meaning is as follows: no matter how many positioning positions are arranged in the circumferential direction relative to the pen body, but the positioning positions are only of two different types, wherein the first type is blocking of a channel, and the first type is also called "occupying space"; the second type is evacuation channels, also known as "give way". So that it is not important how the two different types of positioning positions are arranged in the circumferential direction.
6. In the above embodiments, the so-called "taking place" is realized by moving the blocking piece 14 to the protection channel, and the so-called "giving way" is realized by withdrawing the blocking piece 14 from the protection channel. However, the invention is not limited thereto, and the invention can be realized by providing the pen cap 1 with a slot along the longitudinal direction, wherein the slot is formed to be abducted when the slot rotates to the position of the protection channel, and the end face of the pen cap 1 is formed to occupy the position of the protection channel when the end face rotates to the position of the protection channel. The groove can be arranged on the inner edge of the pen cap 1 or the outer edge, and the same technical effect is achieved. The essence of the invention is to use the structure of the cap 1 in the circumferential direction (blocking piece) and with the rotation to realize the "taking up" or "giving way" of the protection channel. Accordingly, the invention should not be limited to the blocking piece 14 disclosed in the figures of the above embodiments. This is a point of view that is readily understood and accepted by those skilled in the art.
7. In the above embodiment, the hole shape of the attachment/detachment hole 13 is not limited, but the hole shape of the attachment/detachment hole 13 is usually a special shape and matches the cross-sectional shape and size of the lancet 5. Because the special shape has the advantage that the special hole prevents the lancet 5 from rotating with the rotation of the needle cap 21 after the needle cap 21 is inserted into the lancet 5, the needle cap 21 is easily separated from the lancet 5. The invention is not limited thereto and other shapes of the loading and unloading holes 13 may be used, such as square, hexagonal, triangular, even circular or oval, etc. As will be readily understood and appreciated by those skilled in the art.
8. In the above embodiment, the lancet 5 is designed with a guide port at the front of the needle holder 6 for convenience of insertion. The invention is not limited thereto and will be readily appreciated by those skilled in the art.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (8)
1. The cap-unloading-free needle-type blood taking pen with the needle unloading protection is a blood taking pen which can be used for loading and unloading blood taking needles without removing the pen cap in use, and comprises a shooting rod (3), a needle unloading rod (4) and a shell;
the injection rod (3) is an emission part of the blood sampling pen, and a needle seat (6) for inserting the disposable blood sampling needle (5) is arranged at the head of the injection rod (3);
the needle unloading rod (4) is a needle unloading part of the blood sampling pen, the needle unloading rod (4) is provided with a needle unloading acting surface (11), and the needle unloading acting surface (11) is used for pushing and unloading the blood sampling needle (5) arranged on the needle seat (6);
the pen comprises a pen cap (1) and a pen body, wherein the pen body is formed by fixedly connecting a shell (8) and a cap seat (2), ejection cavities are arranged in the pen cap (1) and the pen body, an ejection rod (3) is arranged in the ejection cavities, and a locking structure for locking the ejection rod (3) in a loading way is arranged between the ejection rod (3) and the pen body; the needle unloading rod (4) is arranged on the pen body in a sliding way, wherein the needle unloading acting surface (11) is positioned at the rear part of the needle seat (6) and is positioned on a parallel sliding path of the injection rod (3); the pen cap (1) is connected with the cap seat (2) in a matched manner through a connecting port;
the method is characterized in that: the head of the pen cap (1) is provided with a loading and unloading hole (13) which can allow the blood taking needle (5) to pass through, and the loading and unloading hole (13) is aligned with the needle seat (6) at the head of the injection rod (3), so that a cap unloading-free needle loading and unloading structure is formed;
the needle unloading rod (4) is provided with a safety bolt (16), a protection channel is arranged on the pen body corresponding to the safety bolt (16), and the safety bolt (16) is arranged in the protection channel;
the pen cap (1) is provided with a blocking block (14) aiming at the safety bolt (16), the pen cap (1) and the pen body are rotationally positioned and connected in the circumferential direction of the blood sampling pen, specifically, a bulge is arranged on one side between the inner edge of the cylinder body of the pen cap (1) and the outer edge of the cylinder body of the cap seat (2), a groove is arranged on the other side, the bulge and the groove are matched in the rotational direction to form rotationally positioned and connected, the rotationally positioned and connected enables the pen cap (1) to have two different corner positioning positions relative to the pen body, the two different corner positioning positions can be mutually switched, wherein in the state of a first corner positioning position, the blocking block (14) arranged on the pen cap (1) is positioned in front of the safety bolt (16) arranged on the needle unloading rod (4), and blocks the path of the safety bolt (16) for implementing needle unloading along with the forward movement of the needle unloading rod (4), namely, the first corner positioning position is a blocking channel, and the first corner positioning position is also called as a occupying position; in the state of the second corner positioning position, the blocking block (14) arranged on the pen cap (1) is positioned at one side of the safety bolt (16) arranged on the needle unloading rod (4), and the safety bolt (16) is withdrawn along with the forward movement of the needle unloading rod (4) to realize the needle unloading path, namely the second corner positioning position is a withdrawal channel, namely 'yielding', so as to form a needle unloading protection structure.
2. The lancing pen of claim 1, wherein: the blocking block (14) is arranged on the inner side surface of the pen cap (1) cylinder, the blocking block (14) is provided with a blocking surface (17), and the blocking surface (17) faces to the rear of the pen cap (1).
3. The lancing pen of claim 1, wherein: the blocking block (14) is arranged at the rear end of the barrel of the pen cap (1), the blocking block (14) is provided with a blocking surface (17), and the blocking surface (17) faces to the rear of the pen cap (1).
4. The lancing pen of claim 1, wherein: the safety bolt (16) is a branch structure extending from the main body rod of the needle unloading rod (4).
5. The lancing pen of claim 4, wherein: the branch structure is L-shaped, the L-shaped main body section is parallel to the main body rod axis of the needle unloading rod (4), and the L-shaped connecting section is connected with the main body rod of the needle unloading rod (4) into a whole.
6. The lancing pen of claim 1, wherein: a limiting surface (19) is arranged on the injection rod (3), a blocking surface (20) is arranged on the inner side of the barrel of the pen cap (1) corresponding to the limiting surface (19), the needle unloading action surface (11) of the needle unloading rod (4) is abutted against the blood taking needle (5) in the needle unloading state, and the injection rod (3) and the blood taking needle (5) are driven to integrally move forwards when the needle unloading rod (4) moves forwards; when the limiting surface (19) of the injection rod (3) is in contact fit with the blocking surface (20) on the pen cap (1), the injection rod (3) is limited and stops moving forwards, and at the moment, the blood taking needle (5) is forced to be separated from the needle seat (6) and extend out of the loading and unloading hole (13) when the needle unloading rod (4) continues to move forwards.
7. The lancing pen of claim 1, wherein: the hole shape of the loading and unloading hole (13) is in a special shape and is matched with the cross section shape and the size of the blood taking needle (5).
8. The lancing pen of claim 1, wherein: the needle seat (6) is formed by connecting a front guiding port and a rear clamping seat, and a movement channel for sliding the needle unloading acting surface (11) along the axis direction of the injection rod (3) is arranged at the rear of the clamping seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449421.5A CN110141250B (en) | 2019-05-28 | 2019-05-28 | Needle-type blood sampling pen without removing cap and with needle removing protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449421.5A CN110141250B (en) | 2019-05-28 | 2019-05-28 | Needle-type blood sampling pen without removing cap and with needle removing protection |
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| CN110141250A CN110141250A (en) | 2019-08-20 |
| CN110141250B true CN110141250B (en) | 2024-04-02 |
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| CN201910449421.5A Active CN110141250B (en) | 2019-05-28 | 2019-05-28 | Needle-type blood sampling pen without removing cap and with needle removing protection |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214245B (en) * | 2019-09-18 | 2022-09-06 | 天津华鸿科技股份有限公司 | Blood sampling pen |
| CN111419245B (en) * | 2020-03-17 | 2023-12-05 | 天津华鸿科技股份有限公司 | Blood sampling pen |
| CN111419241B (en) * | 2020-04-21 | 2021-11-16 | 苏州施莱医疗器械有限公司 | Blood sampling pen capable of preventing needle from being detached due to misoperation after loading |
| CN113288141B (en) * | 2021-06-28 | 2022-07-01 | 吉林大学第一医院 | Lancet device capable of separating a lancet |
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Address after: 215000 No.168 Putuoshan Road, high tech Zone, Suzhou City, Jiangsu Province Applicant after: STERILANCE MEDICAL (SUZHOU) Inc. Address before: River Road, Suzhou City, Jiangsu Province, Li Xiangcheng District No. 68 215133 Applicant before: STERILANCE MEDICAL (SUZHOU) Inc. |
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