CN106264562B - Retracting type head pressing type disposable hemostix - Google Patents
Retracting type head pressing type disposable hemostix Download PDFInfo
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- CN106264562B CN106264562B CN201610768339.5A CN201610768339A CN106264562B CN 106264562 B CN106264562 B CN 106264562B CN 201610768339 A CN201610768339 A CN 201610768339A CN 106264562 B CN106264562 B CN 106264562B
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- Prior art keywords
- elastic claw
- hemostix
- elastic
- straight surface
- head
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- 208000010727 head pressing Diseases 0.000 title claims description 16
- 210000000078 claw Anatomy 0.000 claims abstract description 105
- 230000009471 action Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 2
- 238000010241 blood sampling Methods 0.000 abstract description 8
- 239000008280 blood Substances 0.000 description 13
- 210000004369 blood Anatomy 0.000 description 13
- 230000000694 effects Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 208000019300 CLIPPERS Diseases 0.000 description 2
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000016776 visual perception 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
- A61B5/151—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
- A61B5/150007—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
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
-
- 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
-
- 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
- A61B5/15142—Devices intended for single use, i.e. disposable
Abstract
The utility model provides a retract type head push type disposable hemostix, includes shell, nook closing member, spring and ejector, its characterized in that: the hair pusher is provided with a combination of an inclined plane and a straight plane corresponding to the head-on of the elastic claw; the inclined plane is behind, and the straight plane is in front; the straight surface is higher than the unhooking critical point position of the elastic claw and is lower than the lateral opening end point position of the elastic claw; a space is arranged between the straight surface and the shell. When the device is used, the head of the hemostix is aligned with a blood sampling part and pressed, the hair pushing device moves backwards relative to the shell, the elastic claw climbs along the inclined plane, the needle core is launched under the action of the spring after the elastic claw is laterally opened to a unhooking critical point, then the elastic claw slides to a straight surface, the elastic claw enters a space occupied by the needle core, and at the moment, each elastic claw clamps the hair pushing device under the action of elastic clamping force and enables the extending end of the hair pushing device to be in a retraction state relative to the head of the shell. The utility model solves the problem that the head part of the hemostix can not retract after the hemostix is used, so that a user can easily identify the appearance of the head part of the hemostix before and after the hemostix is used.
Description
Technical Field
The utility model relates to the field of medical blood sampling devices, in particular to a head pressing type disposable safety hemostix (or called blood taking needle) with an ejection mechanism. The hemostix has a significant retraction of the head after use to distinguish the appearance of the head prior to use.
Background
In the field of medical blood sampling, the disposable hemostix is popular with medical staff and patients due to the characteristics of small volume, safe use and convenient operation, and is widely used in various medical institutions and diabetics at present. The hemostix is provided with the ejection mechanism, has compact structure and is integrally disposable, safe and convenient, and therefore, has strong market development potential.
Chinese patent CN2619583Y issued a patent entitled "self-locking disposable safety automatic blood taking needle". This patent presents a representative conventional cap-type head-pressing disposable hemostix. The structure of the hair-pushing device comprises a shell, an end cover, a needle core, a spring, a hair-pushing device and a cap. In the assembled state, the end cover is provided with a pair of elastic claws, and the elastic claws clamp the side lugs on two sides of the needle core by using the clamping hooks and clamping force; the spring is propped between the end cover and the needle core; when the head of the hemostix is pressed, the ejector moves backwards to hit the two elastic claws through the inclined plane and force the elastic claws to open, so that the needle core is triggered to unhook and shooting puncture is generated under the pushing of the spring. The cap type blood collector head adopts the structure form of a cap, namely the cap is sleeved on the blood collector head, and a detection rod extends out of the cap to detect the locking state of the needle core and protect the needle tip.
Chinese patent CN205107692U announces that a patent of the utility model named "improved head-pressing disposable hemostix" is entitled. Fig. 1 to 4 of the patent show a typical conventional twist-cap type head-push type disposable hemostix. The basic structure and working principle are similar to those of the above-mentioned Chinese patent CN2619583Y, except that: the head of the hemostix adopts the structure form of the twisting cap, when in use, the twisting cap is twisted firstly, so that the neck between the needle core and the protection rod is broken, and then the protection rod and the twisting cap are pulled out.
The core structures of the two types of head pressing type disposable hemostix are ejection mechanisms, namely ejection mechanisms formed by mutually matching a pair of elastic claws on the end cover, a pair of side lugs on the needle core, a spring and inclined planes on the hair pusher. The ejection mechanism has a mature structure and distinct characteristics, but from the perspective of user experience, the ejection mechanism still has some defects because the head is fully rebounded after being pressed during blood collection: first, the head shape before and after use cannot be recognized from the appearance; secondly, the head is fully rebounded after being pressed, so that the head has a reaction force to act on the finger which just finishes blood collection, no obvious pause exists, the using feel is bad, and the user experience is bad.
In the past, the design of the product is more concerned about blood sampling effect, but with the continuous progress of technology and the improvement of living standard of people, the design concept of the product is as follows: on the premise of ensuring the blood sampling effect, more attention is paid to user experience, for example, first, the user feel is used; second, visual perception; third user psychology, etc. For this reason, how to solve the above problems better and effectively is the subject of the present utility model.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present utility model provides a retracting head pressing type disposable hemostix, which aims to solve the problems of incapability of recognizing the appearance of the head before use and poor use hand feeling without obvious pause caused by incapability of retracting after the head of the hemostix is pressed.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a retractable head pressing type disposable hemostix comprises a shell, a needle core, a spring and a hair pusher.
At least two elastic claws are positioned in the shell, and all the elastic claws form an elastic clamp together.
The needle core is clamped in the elastic clamp, the spring is propped against the tail of the needle core and acts on the ejection direction of the needle core, and the elastic clamp clamps the needle core by utilizing the clamping hooks and clamping force at the tail ends of the elastic claws to form locking before ejection.
The hair pusher head extends from the front end of the housing, and the hair pusher body is slidably coupled within the housing.
The innovation is that: the hair pusher is provided with a section of first inclined surface and a section of first straight surface corresponding to each elastic claw.
The projection of the first straight face onto the ejector axis is located in front of the projection of the first inclined face onto the ejector axis.
The distance from the intersection point of the first straight surface and the first inclined surface to the axis of the hair pushing device is larger than the distance from the critical point of the lateral opening and unhooking of the elastic claw to the axis of the hair pushing device, and is smaller than the distance from the end point of the lateral opening of the elastic claw to the axis of the hair pushing device.
A space occupied by the elastic claw is reserved between the first straight surface and the inner wall of the shell.
When the push-out end of the head of the hemostix is pressed in a locking state before the push-out, the push-out device moves backwards relative to the shell, the elastic claw climbs along the first inclined plane, meanwhile, the first inclined plane forces the elastic claw to open laterally, after the elastic claw opens laterally to a unhooking critical point, the needle core is launched under the action of the spring, then the elastic claw slides to the first straight surface, the tail end of the elastic claw is positioned in a space occupied, and at the moment, under the action of elastic clamping force, each elastic claw clamps the push-out device through the first straight surface, and the push-out end of the push-out device is in a retraction state relative to the head of the shell.
The relevant contents and changes of the technical scheme are explained as follows:
1. in the above scheme, the basic structure, the functions and the actions of the shell, the needle core, the spring and the hair pusher are all in the prior art. Reference may be made to the technical content cited in the background of the utility model.
2. In the above-mentioned scheme, the inclined planes in the "first inclined plane" and the "second inclined plane" include a plane, an arc surface or a conical surface, but are all inclined relative to the axis of the hemostix, so as to form the inclined plane. In other words, the inclined surface has four types of an inclined surface in a planar form, an inclined surface in a concave form (the inclined surface is constituted by a plurality of straight lines in an inclined direction, and a concave or convex surface is formed in a vertical inclined direction, but is also an inclined surface in essence), an inclined surface in a conical form, and an inclined surface in an arc form (the inclined surface is constituted by at least one concave arc or/and convex arc in an inclined direction, but is also an inclined surface in essence). Any one of the present utility model is applicable, and may be specifically determined according to the actual situation. Wherein the first is a bevel in planar form; the second is a bevel in the form of a concave surface; the third is an inclined plane in the form of a conical surface; the fourth is an inclined surface in the form of an arc surface.
3. In the above-mentioned scheme, "front" in the "front" and "front end" refers to the direction in which the needle tip in the hemostix is pointed. The "rear" in the "rearward" refers to the opposite direction of the "front".
4. The utility model relates to a retracting type head pressing type disposable blood sampling device the device comprises a twisting cap type structure and a cap type structure. Namely, the disposable hemostix of the utility model is usually provided with a protective cap, and the structural form of the protective cap can be a twist cap type or a cap type. This does not affect the achievement of the object of the present utility model.
The design principle and the conception of the utility model are as follows: in order to enable the extending end of the back hair pushing device of the head pressing type disposable hemostix to have obvious retracting effect relative to the head of the shell, the utility model adopts the following technical measures: firstly, changing the driving surface of the hair pusher acting on the elastic claw from the original pure inclined surface to the combination of the inclined surface and the straight surface; secondly, the position relation of projection of the inclined plane and the straight plane on the axis of the hair pusher is as follows: the inclined plane is behind, and the straight plane is in front; third, the positional relationship of the straight face in the lateral direction Zhang Kaifang of the elastic claw is: the straight surface is higher than the unhooking critical point position of the elastic claw and is lower than the lateral opening end point position of the elastic claw; fourth, a space occupied by the elastic claw is arranged between the straight surface and the inner wall of the shell. When the device is used, the hemostix is held by hand, the head of the hemostix is aligned with a blood sampling part and pressed, the hair pushing device moves backwards relative to the shell, the elastic claw climbs along the inclined plane, meanwhile, the elastic claw is laterally opened, the needle core is launched under the action of the spring after the elastic claw is opened to the unhooking critical point, then the elastic claw slides to the straight surface, the tail end of the elastic claw is positioned in the occupied space, and at the moment, under the action of elastic clamping force, each elastic claw clamps the hair pushing device through the straight surface, and the extending end of the hair pushing device is in a retracting state relative to the head of the shell.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages and effects:
1. the utility model solves the problem that the head of the hemostix is totally rebounded and can not retract after being used, so that a user can easily identify the appearance forms of the head of the hemostix before and after being used, and the identification degree of the using state of the hemostix product is obviously improved.
2. The extending end of the back hair pusher cannot rebound completely and has obvious retraction, so that a user can obviously feel a pause in use, an operator can obviously feel the pause, the hand feeling in use is good, and the user experience is good. The design concept that the current hemostix product pays attention to the user experience such as the use handfeel, the visual feeling and the user psychology is met.
3. The utility model has simple structure and ingenious conception, does not add other structural members, can be realized by improving the original die, and almost does not increase the cost, thus having outstanding substantive characteristics and remarkable progress compared with the prior art.
Drawings
FIG. 1 is an exploded perspective view of a retractable head-pressing type disposable hemostix according to embodiment 1 of the present utility model;
FIG. 2 is a perspective view of a retractable head-pressing type disposable hemostix according to embodiment 1 of the present utility model;
FIG. 3 is a perspective view of the tail cap of embodiment 1 of the present utility model;
FIG. 4 is an enlarged view of a portion of FIG. 3;
FIG. 5 is a perspective view of the hair clipper of example 1 of the present utility model;
FIG. 6 is an enlarged view of a portion of FIG. 5;
FIG. 7 is a front view showing the appearance of embodiment 1 of the present utility model;
fig. 8 is a sectional view showing an initial assembly state of embodiment 1 of the present utility model;
FIG. 9 is a sectional view showing a state in which a twist cap is removed in embodiment 1 of the present utility model;
fig. 10 is a sectional view showing a state of pressing the head of the hair clipper of embodiment 1 of the present utility model;
FIG. 11 is a sectional view showing a retracted state of the head after lancing according to embodiment 1 of the present utility model;
FIG. 12 is a perspective sectional view of a retracting, head pressing type disposable hemostix according to embodiment 2 of the present utility model;
FIG. 13 is an enlarged view of a portion of FIG. 12;
fig. 14 is a perspective view of the ejector according to embodiment 2 of the present utility model.
The reference numerals in the above figures are explained as follows:
1. a housing; 2. a tail cover; 3. a needle core; 4. a spring; 5. a hair pusher; 6. twisting the cap; 7. an elastic claw; 8. a first inclined surface; 9. a clamping hook; 10. a first straight surface; 11. space occupation; 12. a second inclined surface; 13. a second straight surface; 14. a shoulder; 15. a third inclined surface; 16. the claw tip.
Detailed Description
The utility model is further described below with reference to the accompanying drawings and examples:
example 1: retracting type head pressing type disposable hemostix
As shown in fig. 1 to 11, the disposable blood collector is composed of a housing 1, a tail cap 2, a needle core 3, a spring 4, a hair pusher 5 and a twist cap 6 (see fig. 1 and 2).
In the assembled state (see fig. 8), the tail cap 2 is covered at the tail port of the housing 1, and the tail cap 2 extends out of the housing 1 with two elastic claws 7 arranged symmetrically in opposite faces, and the two elastic claws 7 together form an elastic clamp. The needle core 3 is clamped in an elastic clamp, a spring 4 is propped against the tail of the needle core 3 and acts on the ejection direction of the needle core 3, and the elastic clamp clamps the needle core 3 by utilizing a clamping hook 9 and clamping force at the tail end of each elastic claw 7 to form pre-ejection locking. The head of the hair pusher 5 extends out from the front end of the housing 1, and the hair pusher 5 is connected with the body of the housing 1 in a sliding way. The twisting cap 6 is sleeved on the head of the hair pusher 5, and a protective sleeve on the twisting cap 6 is sleeved on a protective rod on the head of the needle core 3.
The above matters in this embodiment are all in the prior art, and the innovation of the present utility model is that:
(1) The ejector 5 is provided with a first inclined surface 8 and a first straight surface 10 (see fig. 5 and 6) on the opposite sides of the elastic claws 7.
(2) The projection of the first straight surface 10 on the axis of the hair pusher 5 is located in front of the projection of the first inclined surface 8 on the axis of the hair pusher 5. The forward direction refers to the direction in which the lancet tip is pointed. This requirement is to ensure that the first inclined surface 8 is in a positional relationship with the projection of the first straight surface 10 on the axis of the ejector 5, i.e. the first inclined surface 8 is rearward and the first straight surface 10 is forward.
(3) The distance from the intersection point of the first straight surface 10 and the first inclined surface 8 to the axis of the hair pusher 5 is larger than the distance from the critical point of the lateral opening and unhooking of the elastic claw 7 to the axis of the hair pusher 5, and is smaller than the distance from the end point of the lateral opening of the elastic claw 7 to the axis of the hair pusher 5. This requirement is to ensure the positional relationship of the first straight surface 10 in the lateral opening direction of the elastic claw 7, that is, the first straight surface 10 is higher than the unhooking critical point position of the elastic claw 7 and lower than the end point position of the lateral opening of the elastic claw 7.
(4) A space 11 occupied by the elastic claw 7 is reserved between the first straight surface 10 and the inner wall of the shell 1. This is required to ensure that there is sufficient space between the first straight face 10 and the inner wall of the housing 1 for the distal end of the resilient claw 7 to move unimpeded thereto.
(5) In the locked state before the shooting, when the extending end of the hair pusher 5 of the head of the hemostix is pressed, the hair pusher 5 moves backwards relative to the shell 1, the elastic claw 7 climbs along the first inclined plane 8, meanwhile, the first inclined plane 8 forces the elastic claw 7 to open laterally, after the elastic claw 7 opens laterally to the unhooking critical point, the needle core 3 is shot under the action of the spring 4, then the elastic claw 7 slides to the first straight plane 10, the tail end of the elastic claw 7 is positioned in the occupied space 11, and at the moment, under the action of elastic clamping force, each elastic claw 7 clamps the hair pusher 5 through the first straight plane 10, and the extending end of the hair pusher 5 is in the retracted state relative to the head of the shell 1.
(6) In order to make the elastic claw 7 better able to cooperate with the first inclined surface 8 and the first straight surface 10, the elastic claw 7 is provided with a second inclined surface 12 corresponding to the first inclined surface 8, and the elastic claw 7 is provided with a second straight surface 13 corresponding to the first straight surface 10 (see fig. 3 and 4). The second inclined surface 12 is in sliding contact with the first inclined surface 8 when the elastic claw 7 climbs along the first inclined surface 8, and the second straight surface 13 is in contact with the first straight surface 10 when the elastic claw 7 slides to the first straight surface 10. Of course, the elastic claw 7 may be provided with an arc surface corresponding to the first inclined surface 8 and the first straight surface 10, and the first inclined surface 8 and the first straight surface 10 may be engaged with each other by the arc surface.
(7) The first straight surface 10 may be parallel to the axis of the hair pusher 5, but in order to prevent the elastic claw 7 from slipping off, the first straight surface 10 may also be designed with a reverse inclination angle with respect to the axis of the hair pusher 5, which reverse inclination angle can prevent the elastic claw 7 from slipping off the first straight surface 10 under the action of the elastic clamping force. In addition, a fastening body may be further disposed on the first straight surface 10, and a hook body is disposed on the elastic claw 7 corresponding to the fastening body, and when the elastic claw 7 slides to the first straight surface 10, the hook body on the elastic claw 7 cooperates with the fastening body on the first straight surface 10, so as to prevent the elastic claw 7 from sliding off the first straight surface 10.
The action process when the embodiment is used is as follows:
(1) Initial assembled state
As shown in fig. 8, the whole blood collector consists of a shell 1, a tail cover 2, a needle core 3, a spring 4, a hair pushing device 5 and a twisting cap 6, wherein the spring 4 is in a pre-pressing state, the needle core 3 is in a pre-emission locking state, and the blood collector is provided with the twisting cap 6 (protective cap).
(2) Removing the twist cap
As shown in fig. 9, the lancet enclosure 1 is held by one hand, and the torsion cap 6 is twisted and removed by the other hand.
(3) Push-to-fire state
As shown in fig. 10 and 11, the protruding end of the ejector 5 of the head of the hemostix is pressed against the blood sampling part, the ejector 5 moves backward relative to the housing 1, the elastic claw 7 climbs along the first inclined plane 8, the first inclined plane 8 forces the elastic claw 7 to open laterally (see fig. 10), the needle core 3 is launched under the action of the spring 4 after the elastic claw 7 opens laterally to the unhooking critical point, then the elastic claw 7 slides to the first straight plane 10, the tail end of the elastic claw 7 is located in the space 11, and at this time, under the action of elastic clamping force, each elastic claw 7 clamps the ejector 5 through the first straight plane 10, and the protruding end of the ejector 5 is in a retracted state relative to the head of the housing 1 (see fig. 11).
Example 2: retracting type head pressing type disposable hemostix
As shown in fig. 12 to 14, the disposable blood collector is composed of a housing 1, a tail cap 2, a needle core 3, a spring 4, a hair pusher 5 and a twist cap 6 (see fig. 1 2).
This embodiment differs from embodiment 1 in that: first, the first inclined surface 8 and the first straight surface 10 are provided at different positions on the hair pusher 5. In embodiment 1, the first inclined surface 8 and the first straight surface 10 are provided at the third inclined surface 15 of fig. 14 of embodiment 2, whereas in embodiment 2, the first inclined surface 8 and the first straight surface 10 are provided at positions shown in fig. 14. Second, in embodiment 1, the first inclined surface 8 and the first straight surface 10 are engaged with the tip 16 of the elastic claw 7, whereas in embodiment 2, the first inclined surface 8 and the first straight surface 10 are engaged with the shoulder 14 of the elastic claw 7. Third, in embodiment 2, the mating relationship of the tip 16 of the elastic claw 7 and the third slope 15 is still maintained. From the effect of retracting the protruding end of the ejector 5 after use, embodiment 1 is identical to embodiment 2.
Other structures and principles of this embodiment are the same as those of embodiment 1, and reference may be made to the content related to embodiment 1, and the description will not be repeated here.
Other embodiments and variations of the present utility model are described below:
1. although the above two embodiments are presented as a twist-cap type head-push type disposable blood collector, the present utility model is not limited thereto, and is also applicable to a cap type head-push type disposable blood collector. The twist cap and the cap are two forms of the blood collector protective cap, but the two forms are irrelevant to the innovation point of the utility model, which is the situation that a person skilled in the art can understand and recognize.
2. In both of the above embodiments, one spring clip formed by the two spring fingers 7 together is an extended structure extending from the inner end face of the tail cap 2. The utility model is not limited thereto and the spring clip may be formed directly by extension of the housing 1. For example, the shell 1 is designed to be formed by splicing an upper half and a lower half, each half of the shell is extended with an elastic claw, and when the two halves of the shell are spliced, the two elastic claws form an elastic clamp together. At this time, the tail cap 2 may be omitted at the same time and incorporated into the two-half type housing. Therefore, the tail cap 2 and the provision of the elastic claw structure extending on the tail cap 2 are not necessarily written in claim 1, which is a case understood and recognized by those skilled in the art.
3. In both of the above embodiments, the spring clips are formed from two spring fingers each arranged face-to-face symmetrically. However, the number of the elastic claws is not limited to two, and more than two, such as three, four, five, etc., can be included, and the elastic claws can be arranged around the periphery of the needle core, so that the same technical effect can be achieved. This is a variation that is readily understood by one 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 (5)
1. A retracting type head pressing type disposable hemostix comprises a shell (1), a needle core (3), a spring (4) and a hair pusher (5);
at least two elastic claws (7) are positioned in the shell (1), and all the elastic claws (7) form an elastic clamp together;
the needle core (3) is clamped in an elastic clamp, the spring (4) is propped against the tail of the needle core (3) and acts on the ejection direction of the needle core (3), and the elastic clamp clamps the needle core (3) by utilizing a clamping hook (9) and clamping force at the tail end of each elastic claw (7) to form locking before ejection;
the head of the hair pusher (5) extends out from the front end of the shell (1), and the body of the hair pusher (5) is connected in the shell (1) in a sliding way;
the method is characterized in that: the hair pushing device (5) is provided with a section of first inclined surface (8) and a section of first straight surface (10) on the head-on corresponding to each elastic claw (7);
the projection of the first straight surface (10) on the axis of the hair pusher (5) is positioned in front of the projection of the first inclined surface (8) on the axis of the hair pusher (5);
the distance from the intersection point of the first straight surface (10) and the first inclined surface (8) to the axis of the hair pusher (5) is larger than the distance from the critical point of the lateral opening and unhooking of the elastic claw (7) to the axis of the hair pusher (5), and is smaller than the distance from the end point of the lateral opening of the elastic claw (7) to the axis of the hair pusher (5);
a space (11) occupied by the elastic claw (7) is reserved between the first straight surface (10) and the inner wall of the shell (1);
when the ejector (5) of the head of the hemostix is pressed to the stretching end in the locked state before the ejection, the ejector (5) moves backwards relative to the shell (1), the elastic claw (7) climbs along the first inclined plane (8), meanwhile, the elastic claw (7) is forced to be stretched laterally by the first inclined plane (8), after the elastic claw (7) is stretched laterally to the unhooking critical point, the needle core (3) is ejected under the action of the spring (4), then the elastic claw (7) slides to the first straight surface (10), the tail end of the elastic claw (7) is positioned in the occupied space (11), at the moment, under the action of elastic clamping force, each elastic claw (7) clamps the ejector (5) through the first straight surface (10), the stretching end of the ejector (5) is in the retracted state relative to the head of the shell (1), and the stretching end of the ejector does not rebound after the hemostix is used.
2. The hemostix of claim 1, wherein: the elastic claw (7) is provided with a section of second inclined surface (12) corresponding to the first inclined surface (8), and the elastic claw (7) is provided with a section of second straight surface (13) corresponding to the first straight surface (10); the second inclined surface (12) is in sliding contact with the first inclined surface (8) when the elastic claw (7) climbs along the first inclined surface (8), and the second straight surface (13) is in contact with the first straight surface (10) when the elastic claw (7) slides to the first straight surface (10).
3. The hemostix of claim 1, wherein: the elastic claw (7) is provided with cambered surfaces corresponding to the first inclined surface (8) and the first straight surface (10).
4. The hemostix of claim 1, wherein: the first straight surface (10) has a reverse inclination angle relative to the axis of the hair pusher (5), which can prevent the elastic claw (7) from slipping off the first straight surface (10) under the action of the elastic clamping force.
5. The hemostix of claim 1, wherein: the first straight surface (10) is provided with a buckle body, the elastic claw (7) is provided with a hook body corresponding to the buckle body, and when the elastic claw (7) slides to the first straight surface (10), the hook body on the elastic claw (7) is matched with the buckle body on the first straight surface (10), so that the elastic claw (7) is prevented from sliding off the first straight surface (10).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610768339.5A CN106264562B (en) | 2016-08-30 | 2016-08-30 | Retracting type head pressing type disposable hemostix |
| PCT/CN2017/099646 WO2018041137A1 (en) | 2016-08-30 | 2017-08-30 | Press-type disposable blood collector with retractable-type head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610768339.5A CN106264562B (en) | 2016-08-30 | 2016-08-30 | Retracting type head pressing type disposable hemostix |
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| CN106264562A CN106264562A (en) | 2017-01-04 |
| CN106264562B true CN106264562B (en) | 2023-12-12 |
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| CN201610768339.5A Active CN106264562B (en) | 2016-08-30 | 2016-08-30 | Retracting type head pressing type disposable hemostix |
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| CN (1) | CN106264562B (en) |
| WO (1) | WO2018041137A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106264562B (en) * | 2016-08-30 | 2023-12-12 | 苏州施莱医疗器械有限公司 | Retracting type head pressing type disposable hemostix |
| CN110811640B (en) * | 2019-12-03 | 2022-07-05 | 江西司托迈医疗科技有限公司 | Booster of implantable medical device and implantable medical system |
| WO2023273338A1 (en) * | 2021-07-02 | 2023-01-05 | 天津云帆医疗器械有限公司 | Blood collection needle |
| CN113995407B (en) * | 2021-09-28 | 2023-08-22 | 苏州施莱医疗器械有限公司 | Simple head pressing type disposable safety hemostix |
| CN113995408B (en) * | 2021-09-28 | 2023-08-22 | 苏州施莱医疗器械有限公司 | Method for preventing false triggering of head pressing type disposable safety hemostix |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106264562A (en) | 2017-01-04 |
| WO2018041137A1 (en) | 2018-03-08 |
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