CN110226938B - Blood sampling pen capable of relieving pain of patient - Google Patents
Blood sampling pen capable of relieving pain of patient Download PDFInfo
- Publication number
- CN110226938B CN110226938B CN201910632446.9A CN201910632446A CN110226938B CN 110226938 B CN110226938 B CN 110226938B CN 201910632446 A CN201910632446 A CN 201910632446A CN 110226938 B CN110226938 B CN 110226938B
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- ejection
- cavity
- rod
- sleeve
- pen
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- 238000010241 blood sampling Methods 0.000 title claims abstract description 12
- 238000010304 firing Methods 0.000 claims abstract description 16
- 239000008280 blood Substances 0.000 claims description 26
- 210000004369 blood Anatomy 0.000 claims description 26
- 230000008602 contraction Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000008058 pain sensation Effects 0.000 claims 6
- 230000001960 triggered effect Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- BPYKTIZUTYGOLE-IFADSCNNSA-N Bilirubin Chemical compound N1C(=O)C(C)=C(C=C)\C1=C\C1=C(C)C(CCC(O)=O)=C(CC2=C(C(C)=C(\C=C/3C(=C(C=C)C(=O)N\3)C)N2)CCC(O)=O)N1 BPYKTIZUTYGOLE-IFADSCNNSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002650 habitual effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 235000012000 cholesterol Nutrition 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000001640 nerve ending Anatomy 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a blood sampling pen for relieving pain of a patient, which comprises a pen cap, a pen body and a tail rod, wherein an ejection device is arranged in the pen body, the ejection device comprises an ejection rod, a firing spring, an ejection cavity, a button, a spring sleeve, a reset spring and a clamping sleeve, the button is pressed to release a clamping lock structure, the ejection rod is triggered to drive a blood sampling needle to axially move towards the skin to be punctured, a ring of convex ring is arranged on the rod body at the front end of a cantilever of the ejection rod, the outer diameter of the convex ring is higher than the highest part of the cantilever, the inner diameter of an axial movement section of the convex ring at the front section of the ejection cavity is larger than the inner diameter of the rear section, the convex ring is in micro-clearance fit with the inner wall of the ejection cavity by 0.02-0.25mm, the stability of the axial movement of the ejection rod during the firing is enhanced, the side deflection of the blood sampling needle arranged at the front end of the ejection rod is weakened, the needle tip shaking is avoided to the maximum, and the pain of the patient is relieved.
Description
Technical Field
The invention relates to the field of medical supplies, in particular to a blood sampling pen capable of relieving pain of a patient.
Background
In modern medicine, quantitative measurement of relevant components in body fluids is very common, for example, for a specific patient, blood samples are collected by puncturing the skin of the human body, and glucose, lactate, cholesterol, bilirubin, etc. in the blood are monitored and analyzed. Although the puncture device and various similar devices named as blood sampling pens are continuously improved or upgraded and deformed, the basic working principle, namely the side locking ejection principle, is not changed fundamentally. The structure has a remarkable characteristic that the center of the device is provided with an elongated ejection rod, the front end of the ejection rod is provided with a needle cylinder, and the disposable blood taking needle matched with the puncture device is arranged in the needle cylinder. When the puncture device enters a firing ready state, the cantilever at the side of the ejection rod is in locking fit with a structure arranged on the side wall of the device, when an operator operates, the trigger part on the outer surface of the protruding device is pressed down, the locking state is released, and the ejection rod ejects forwards to complete the puncture operation.
The side locking ejection principle is simple and reliable in structure, but is quite obvious in defect, when the firing is started, namely, when a cantilever at the side of the ejection rod is in contact with a locking structure arranged on the side wall of the device, the ejection rod is laterally deflected, the blood taking needle assembled at the front end of the ejection rod is inevitably laterally deflected, the needle cylinder and the blood taking needle arranged in the needle cylinder are in a free state when moving forwards, the ejection rod moves forwards, the needle cylinder is suspended more and less limited, the instant unavoidable needle point shaking of the skin is inevitably caused, the large stimulation and wound expansion on the subcutaneous nerve endings are caused, and the pain of a patient is increased.
In order to increase the stability of the ejector rod, many technical improvements are made to optimize the structure of the ejector rod, to provide flat features in parts of the ejector rod, and to limit the movement of the flat features in the axial track. But this technical scheme produces another apparent drawback again, and slender, flat ejection pole of making by the macromolecular material is liable to warp, and then influences the motion of ejection pole, so this improvement effect is not good, even obtains the effect that is worth the counterproductive.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a blood sampling pen for relieving pain of a patient, wherein a catapulting rod is matched with a catapulting cavity in a micro-clearance way through a convex ring, so that the stability of axial movement of the catapulting rod during firing is enhanced, the shaking of a needle point is avoided to the greatest extent, and the pain of the patient is relieved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the blood sampling pen capable of relieving pain of a patient comprises a pen cap, a pen body and a tail rod, wherein an ejection device is arranged in the pen body, the ejection device comprises an ejection rod, a firing spring, an ejection cavity, a button, a spring sleeve, a reset spring and a clamping sleeve, a blood sampling needle is arranged at the front end syringe part of the ejection rod, the firing spring is sleeved on the rear rod body, the ejection rod is coaxially connected in the ejection cavity in a penetrating way, the tail part extends out of the ejection cavity, two ends of the firing spring are limited to abut against a boss on the ejection rod and the tail wall of the ejection cavity, the spring sleeve is sleeved on the ejection rod behind the ejection cavity, the reset spring is sleeved on the ejection rod in the spring sleeve, the clamping sleeve is clamped at the tail end of the ejection rod, two ends of the reset spring are limited to abut against the front wall of the spring sleeve and the front end of the clamping sleeve, a button window is arranged on the front side wall of the ejection cavity, a cantilever is arranged on the front side wall of the front part of the ejection rod, a locking structure is formed by the cantilever and the button window, the pen body is sleeved on the ejection cavity, the button is arranged above the button window, the button is pressed on the cantilever, the cantilever is connected to the spring sleeve, the tail rod is connected to the spring sleeve, the tail end of the ejection rod is sleeved on the ejection rod, the front end of the cap is clamped on the ejection cavity, the front end of the ejection rod is clamped on the ejection cavity, and the front end of the ejection rod is clamped on the ejection rod.
The ejection rod is triggered, the convex ring at the front end of the ejection rod axially moves in the micro-gap in the ejection cavity, the cantilever is not constrained by the ejection cavity, the ejection rod runs stably, the lateral displacement shake of the blood taking needle is avoided to the greatest extent, and the pain of puncturing the skin is weakened.
The invention further improves the technical scheme that the convex ring is provided with the convex block, the guide rail is arranged in the corresponding ejection cavity, the convex block is matched with the guide rail, the convex block can only axially move in the guide rail, the ejection rod is guided to axially move relative to the ejection cavity, the ejection rod is limited to circumferentially and radially deviate, and the blood taking needle is further ensured not to eccentrically shake.
According to the technical scheme, the inner diameter of the ejector rod convex ring axial movement section of the front section of the ejection cavity is larger than that of the rear section to form a backward-pulling limiting step, and the axial movement distance of the convex ring at the front part of the limiting step is 0.05-3mm larger than the distance between the front end of the ejector rod cantilever and the front end of the ejector cavity button window. The cantilever front end pops out when the cantilever moves to the button window when the ejection rod is pulled backwards, the cantilever and the ejection cavity of the ejection rod are clamped in the cantilever front end popped out, meanwhile, the limiting step limits infinite stretching when the ejection rod is pulled backwards, limiting before pulling backwards is formed, the existing structure of the ejection rod on the rear section and the inner wall of the ejection cavity is changed, and the existing structure of the product is fully utilized, so that the manufacturing process is simpler. Meanwhile, the axial movement distance of the convex ring at the front part of the limiting step is 0.05-3mm greater than the distance between the front end of the cantilever of the ejection rod and the front end of the button window of the ejection cavity, and the cantilever is fully ensured to enter the button window during back pulling.
According to the technical scheme, spring plates for supporting the button are arranged on two sides of a button window of the ejection cavity. The spring plate support button does not sag after being pressed.
According to a further improved technical scheme, an axial raised line is arranged on the outer side of the elastic sheet. The convex strips effectively protect the elastic sheets from being damaged by extrusion.
The pen cap is composed of an adjusting cap, a lining and an indicating sleeve, wherein the lining is sleeved on the front section of the indicating sleeve, the adjusting cap is fixedly connected with the lining in a clamping mode, the lining is screwed on the indicating sleeve, circumferential transverse bar concave-convex stripes are arranged on two sides of an axial indicating key on the outer wall of the indicating sleeve, and the width of the concave-convex stripes is 0.5-2mm. The length of extending out of the pen cap when the blood taking needle is ejected can be adjusted through the rotary adjusting cap, when the blood taking needle is installed and removed, fingers pinch on concave-convex stripes of circumferential crossbars on two sides of the indicating key, friction force is increased, and the pen cap can be easily pulled out.
The invention further improves the technical scheme that the maximum outer diameter of the adjusting cap is smaller than the outer diameter of the position of the indicating key at the rear section of the indicating sleeve, and the drop height is 0.1-2.0mm. When the pen cap is pulled out, people think that the highest point is pinched in habitual, if the maximum outer diameter of the adjusting cap is larger than or equal to the maximum outer diameter of the indicating sleeve, the condition that the adjusting cap is pulled out by mistake due to deviation of force application points of operators easily occurs, so that the action of pulling out the pen cap is blocked, and even the pen cap is damaged due to forced pulling out. The maximum outer diameter is arranged on the indicating sleeve, so that an operator is guided to operate correctly.
According to the technical scheme, needle withdrawing grooves are formed in the corresponding positions of the ejection cavity and the pen body, an outer pushing piece of the U-shaped needle withdrawing rod is clamped outside the pen body, an inner pushing rod axially slides against the ejection rod from the needle withdrawing groove, the top end of the inner pushing rod stretches into the needle cylinder part at the front end of the ejection rod, a clamping convex strip A is arranged on the inner wall of the bottom end of the outer pushing piece, a clamping convex strip B is arranged on the outer wall of the bottom end of the needle withdrawing groove on the pen body, and the clamping convex strip A is clamped with the clamping convex strip B. When the needle withdrawing rod is withdrawn and reset, the clamping convex strips A and B are locked, so that the needle withdrawing rod is stably fixed on the pen body.
The invention further improves the technical scheme that the inner diameter of the front part of the spring sleeve is contracted and smaller than the inner diameter of the cavity of the rear section to form a contraction cavity, and the front end of the return spring is clamped in the contraction cavity; or the outer diameter of the front part of the clamping sleeve is enlarged and is larger than the inner diameter of the cavity of the rear section to form an expansion cavity, and the rear end of the reset spring is clamped in the expansion cavity. The radial movement of the return spring is restrained respectively, and the stability of the return of the rear draw spring rod is improved.
According to the technical scheme, the front part of the spring sleeve is contracted to be smaller than the inner diameter of the cavity of the rear section to form a contracted cavity, the outer diameter of the front part of the clamping sleeve is enlarged to be larger than the inner diameter of the cavity of the rear section to form an expanded cavity, and two ends of the reset spring are respectively clamped in the contracted cavity of the spring sleeve and the expanded cavity of the clamping sleeve. The two ends of the reset spring are clamped between the spring sleeve and the clamping sleeve, so that the radial shake of the reset spring is reduced, and the reset stability of the rear pull ejection rod is better.
The invention has the beneficial effects that:
according to the invention, the projecting ring of the ejection rod is in micro-clearance fit with the ejection cavity, so that the stability of axial movement of the ejection rod during firing is enhanced, the lateral deviation of a blood taking needle arranged at the front end of the ejection rod is weakened, the shaking of a needle point is avoided to the greatest extent, and the pain caused by the piercing of a patient is relieved; meanwhile, the improvement of the details of all parts further enhances the stability and convenience in operation of the product, and improves the overall use effect of the product.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a schematic view of an ejector lever according to the present invention;
FIG. 4 is a schematic view of the ejection chamber of the present invention;
FIG. 5 is a schematic view of the spring housing of the present invention;
FIG. 6 is a schematic view of the ferrule structure of the present invention;
fig. 7 is a schematic view of the structure of the needle retracting lever of the present invention.
Detailed Description
As shown in figures 1 to 7, the invention comprises a pen cap, a pen body 13 and a tail rod 14 which are composed of an adjusting cap 1, a lining 2 and an indicating sleeve 3, and also comprises an ejection device arranged in the pen body 13, wherein the ejection device comprises an ejection rod 5, a firing spring 6, an ejection cavity 8, a button 7, a spring sleeve 9, a reset spring 10 and a clamping sleeve 11, a needle cylinder part 51 at the front end of the ejection rod 5 is connected with a blood taking needle 4, the firing spring 6 is sleeved on the rear rod body, the ejection rod 5 is coaxially penetrated in the ejection cavity 8, the tail part extends out of the ejection cavity 8, two ends of the firing spring 6 are limited and are abutted against a boss 52 and the tail wall of the ejection cavity on the ejection rod, the spring sleeve 9 is sleeved on the ejection rod 5 at the rear of the ejection cavity, the reset spring 10 is sleeved on the ejection rod 5 in the clamping sleeve, the clamping sleeve 11 is clamped at the tail end of the ejection rod 5, two ends of the reset spring 10 are limited and abutted against the front wall of the spring sleeve 9 and the front end of the clamping sleeve 11, the invention discloses a structure improvement of an inventive structure, which comprises a pen body, a button 7 arranged on the pen body and positioned above the button window, a button 7 pressing the cantilever 53 to release the lock, a tail rod 14 connected with the tail end of a spring sleeve 11, a bushing 2 sleeved on the front section of an indicating sleeve 3, an adjusting cap 1 fixedly connected with the bushing 2, a pen cap assembled on the indicating sleeve 3 in a screwing way, and a pen cap connected with the front end of the ejection cavity 8, wherein the stability of axial movement of the ejection rod during firing is enhanced, the side deflection of a blood taking needle arranged at the front end of the ejection rod is reduced, the needle tip shake is avoided to the greatest extent, the inner diameter of the convex ring axial movement section of the front section of the ejection cavity 8 is larger than that of the rear section, the convex ring 54 is in clearance fit with the inner wall of the ejection cavity 8 by 0.02-0.25mm, and the problem is solved by the micro clearance fit of the convex ring and the ejection cavity.
In order to limit the circumferential and radial deflection of the ejector rod, a projection 55 is arranged on the convex ring 54, a guide rail 82 is arranged in the corresponding ejection cavity, the projection 55 is matched with the guide rail 82, and the ejector rod 5 only moves axially relative to the ejection cavity 8.
Meanwhile, when the ejection rod is pulled backwards, the front end of the cantilever pops up when the cantilever moves to the button window and is clamped in the button window, the cantilever of the ejection rod and the ejection cavity form a locking state, a rear limiting structure of a lug and the bottom of the inner wall of the ejection cavity is arranged on the rear section of the ejection rod at present in a conventional mode, the manufacturing process of the ejection rod and the ejection cavity is complex, the inner diameter of a convex ring axial movement section of the front section of the ejection cavity of the product is larger than that of the rear section to form a rear pulling limiting step 83, the axial movement distance of the convex ring at the front part of the limiting step is larger than that of the front end of the cantilever of the ejection rod by 0.05-3mm, the existing structure of the product is fully utilized, the rear pulling front limiting is formed, the limiting step limits infinite stretching when the ejection rod is pulled backwards, and the manufacturing process is simpler. Meanwhile, the axial movement distance of the convex ring at the front part of the limiting step is 0.05-3mm greater than the distance between the front end of the cantilever of the ejection rod and the front end of the button window of the ejection cavity, and the cantilever is fully ensured to enter the button window during back pulling.
In order to prevent the button 7 from sinking after being pressed and reduce the possibility of mutual interference when the button is matched with other components, two sides of a button window 81 of the ejection cavity are provided with elastic sheets 84 for supporting the button; in order to effectively protect the spring plate from being damaged by extrusion, an axial raised line 85 is provided on the outer side of the spring plate 84.
When the pen cap is pulled out, people think that the highest point is pinched in habitual, if the maximum outer diameter of the adjusting cap is larger than or equal to the maximum outer diameter of the indicating sleeve, the condition that the adjusting cap is pulled out by mistake due to deviation of force application points of operators easily occurs, so that the action of pulling out the pen cap is blocked, and even the pen cap is damaged due to forced pulling out. The maximum outer diameter of the adjusting cap 1 is smaller than the outer diameter of the position where the rear section indicating key of the indicating sleeve 3 is located, the drop height is 0.1-2.0mm, the maximum outer diameter is arranged on the indicating sleeve, and an operator is guided to operate the indicating sleeve correctly.
The two sides of the axial indication key 31 on the outer wall of the indication sleeve 3 are provided with circumferential transverse bar concave-convex stripes 32, the width of each concave-convex stripe 32 is 0.5-2mm, and the wider concave-convex stripes increase the friction force of hand pinching, so that an operator can easily pull out the pen cap.
The tail end of the ejection rod 5 is composed of an upper clamping strip 56 and a lower clamping strip 56, a strip-shaped elastic gap is formed between the two clamping strips, a clamping protrusion A57 is arranged on the clamping strip 56, a circle of clamping protrusions B111 are arranged on the inner wall of the clamping sleeve 11, and the clamping protrusion A57 is clamped with the clamping protrusions B111 to enable the clamping sleeve to be fixedly connected to the clamping strips. The card sleeve is better in elasticity when being clamped on the card strip, easy to install and more stable in connection structure.
The ejection cavity and the pen body are provided with needle withdrawing grooves at corresponding positions, an outer push plate 121 of the U-shaped needle withdrawing rod 12 is clamped outside the pen body, an inner push rod 122 axially slides against the ejection rod from the needle withdrawing grooves, the top end of the inner push rod 122 stretches into the needle cylinder part 51 at the front end of the ejection rod, after a patient uses the device, the outer push plate is pushed forward, the inner push rod ejects out the blood taking needle 4 inserted into the needle cylinder part 51 at the front end of the ejection rod, and the blood taking needle is not required to be contacted, so that the safety puncture prevention is realized. The inner wall of the bottom end of the push-out piece 121 is provided with a clamping convex strip A123, the outer wall of the bottom end of the needle withdrawing groove on the pen body 13 is provided with a clamping convex strip B131, and when the push-back needle withdrawing rod is reset, the clamping convex strip A123 is clamped with the clamping convex strip B131, so that the needle withdrawing rod is firmly fixed on the pen body.
The front inner diameter of the spring sleeve 9 is contracted and smaller than the inner diameter of the rear section cavity to form a contracted cavity 91, the front outer diameter of the clamping sleeve 11 is enlarged and larger than the inner diameter of the rear section cavity to form an expanded cavity 112, and two ends of the reset spring 10 are respectively clamped in the contracted cavity 91 of the spring sleeve and the expanded cavity 112 of the clamping sleeve. The two ends of the reset spring are clamped between the spring sleeve and the clamping sleeve, the reset spring is not easy to shake in an unrestricted manner, and the reset stability of the back pull is better. Meanwhile, when the ejection rod is triggered by pressing the button to drive the blood taking needle to move forwards, the front wall of the expansion cavity of the cutting sleeve and the rear wall of the contraction cavity of the spring sleeve are used for limiting, so that the rear limit that the blood taking needle penetrates out of the pen cap is formed, and the connection between the pen cap and the ejection cavity is the insertion of small force, and the worry that the blood taking needle is bumped open the pen cap is avoided. The existing structure generally depends on the inner wall of the pen cap to limit the forward movement of the blood taking needle, so that the connection between the pen cap and the ejection cavity needs to be realized by adopting a threaded port with large connection force, and an operator takes a lot of time when removing the pen cap.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (9)
1. The blood sampling pen for relieving pain of a patient comprises a pen cap, a pen body (13) and a tail rod (14), wherein an ejection device is arranged in the pen body (13), the ejection device comprises an ejection rod (5), a firing spring (6), an ejection cavity (8), a button (7), a spring sleeve (9), a reset spring (10) and a clamping sleeve (11), a needle cylinder part (51) at the front end of the ejection rod (5) is connected with a blood sampling needle (4), the firing spring (6) is sleeved on the rear rod body, the ejection rod (5) is coaxially connected in the ejection cavity (8) in a penetrating way, the tail part extends out of the ejection cavity (8), two ends of the firing spring (6) are limited to be connected with a boss (52) on the ejection rod and the tail wall of the ejection cavity in a sleeved mode on the ejection rod (5) at the rear of the ejection cavity, the reset spring (10) is sleeved on the ejection rod (5) in the spring sleeve, the clamping sleeve (11) is connected with the tail end of the ejection rod (5) in a clamping sleeve, two ends of the reset spring (10) are limited to be connected with the front wall of the spring sleeve (9) in a front of the clamping sleeve (11), a window (81) is formed in the front of the button cavity (8), a window (81) is formed in the front of the ejection rod (13) is formed on the ejection cavity (81), the pen body above the button window is provided with a button (7), the button (7) touches and presses the cantilever (53) to release the lock, the tail rod (14) is connected to the tail end of the spring sleeve (9), and the pen cap is connected to the front end of the ejection cavity (8), and the pen is characterized in that: a circle of convex ring (54) is arranged on the rod body at the front end of the ejection rod cantilever, the outer diameter formed by the convex ring (54) is higher than the highest part of the cantilever (53), the inner diameter of the convex ring axial movement section of the front section of the ejection cavity (8) is larger than the inner diameter of the rear section, and the convex ring (54) is in clearance fit with the inner wall of the ejection cavity (8) by 0.02-0.25 mm; the convex ring (54) is provided with a convex block (55), a guide rail (82) is arranged in the corresponding ejection cavity, the convex block (55) is matched with the guide rail (82), and the ejection rod (5) moves axially relative to the ejection cavity (8).
2. The blood collection pen for reducing pain sensation in a patient according to claim 1, wherein: the inner diameter of the convex ring axial movement section of the front section of the ejection cavity is larger than that of the rear section to form a backward-pulling limiting step (83), and the axial movement distance of the convex ring at the front part of the limiting step is larger than the distance between the front end of the cantilever of the ejection rod and the front end of the button window of the ejection cavity by 0.05-3mm.
3. The blood collection pen for reducing pain sensation in a patient according to claim 1, wherein: spring plates (84) for supporting the button are arranged on two sides of a button window (81) of the ejection cavity.
4. A blood collection pen for reducing pain in a patient according to claim 3, wherein: the outer side of the spring plate (84) is provided with an axial convex strip (85).
5. The blood collection pen for reducing pain sensation in a patient according to claim 1, wherein: the pen cap consists of an adjusting cap (1), a lining (2) and an indicating sleeve (3), wherein the lining (2) is sleeved on the front section of the indicating sleeve (3), the adjusting cap (1) is fixedly connected with the lining (2) in a clamping manner and is rotationally arranged on the indicating sleeve (3), circumferential transverse bar concave-convex stripes (32) are arranged on two sides of an axial indicating key (31) on the outer wall of the indicating sleeve, and the width of the concave-convex stripes (32) is 0.5-2mm.
6. The blood collection pen for alleviating pain of a patient according to claim 5, wherein: the maximum outer diameter of the adjusting cap (1) is smaller than the outer diameter of the position of the rear section indicating key of the indicating sleeve (3), and the drop is 0.1-2.0mm.
7. The blood collection pen for reducing pain sensation in a patient according to claim 1, wherein: the ejection cavity and the pen body are provided with needle withdrawing grooves at corresponding positions, an outer push plate (121) of a U-shaped needle withdrawing rod (12) is clamped outside the pen body, an inner push rod (122) axially slides against the ejection rod from the needle withdrawing grooves, the top end of the inner push rod (122) stretches into a needle cylinder part (51) at the front end of the ejection rod, a clamping convex strip A (123) is arranged on the inner wall of the rear part of the outer push plate (121), a clamping convex strip B (131) is arranged on the outer wall of the bottom end of the needle withdrawing groove on the pen body (13), and the clamping convex strip A (123) is clamped with the clamping convex strip B (131).
8. The blood collection pen for reducing pain sensation in a patient according to claim 1, wherein: the inner diameter of the front part of the spring sleeve (9) is contracted and smaller than the inner diameter of the cavity of the rear section to form a contraction cavity (91), and the front end of the reset spring (10) is clamped in the contraction cavity (91); or the outer diameter of the front part of the clamping sleeve (11) is enlarged and is larger than the inner diameter of the cavity of the rear section to form an expansion cavity (112), and the rear end of the reset spring (10) is clamped in the expansion cavity (112).
9. The blood collection pen for reducing pain sensation in a patient according to claim 1, wherein: the outer diameter of the front part of the cutting sleeve (11) is enlarged and is larger than the inner diameter of the cavity of the rear section to form an expansion cavity (112), and two ends of the reset spring (10) are respectively clamped in the contraction cavity (91) of the spring sleeve and the expansion cavity (112) of the cutting sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632446.9A CN110226938B (en) | 2019-07-13 | 2019-07-13 | Blood sampling pen capable of relieving pain of patient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632446.9A CN110226938B (en) | 2019-07-13 | 2019-07-13 | Blood sampling pen capable of relieving pain of patient |
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| Publication Number | Publication Date |
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| CN110226938A CN110226938A (en) | 2019-09-13 |
| CN110226938B true CN110226938B (en) | 2024-03-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102178538A (en) * | 2011-06-07 | 2011-09-14 | 天津九安医疗电子股份有限公司 | Blood drawing pen |
| WO2011152580A1 (en) * | 2010-06-04 | 2011-12-08 | Shin Youn-Cheol | Device for preventing reuse of lancet |
| CN103767713A (en) * | 2014-02-28 | 2014-05-07 | 项明亮 | Puncture device causing less pain |
| CN210673335U (en) * | 2019-07-13 | 2020-06-05 | 淮安易捷科技有限公司 | Blood sampling pen for relieving pain of patient |
-
2019
- 2019-07-13 CN CN201910632446.9A patent/CN110226938B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011152580A1 (en) * | 2010-06-04 | 2011-12-08 | Shin Youn-Cheol | Device for preventing reuse of lancet |
| CN102178538A (en) * | 2011-06-07 | 2011-09-14 | 天津九安医疗电子股份有限公司 | Blood drawing pen |
| CN103767713A (en) * | 2014-02-28 | 2014-05-07 | 项明亮 | Puncture device causing less pain |
| CN210673335U (en) * | 2019-07-13 | 2020-06-05 | 淮安易捷科技有限公司 | Blood sampling pen for relieving pain of patient |
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| Publication number | Publication date |
|---|---|
| CN110226938A (en) | 2019-09-13 |
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