CN204468095U - Blood collection device with needle seat guiding structure - Google Patents

Abstract

The utility model relates to a blood sampling device with a needle stand guiding structure, which comprises a front cover which can be assembled in front of a shell in a detachable way; the blood taking needle is provided with a needle body and a needle head, and the needle head is arranged on one end face of the needle body; the needle seat can be linearly movably arranged in the shell to clamp and fix part or all of the rod body of the blood taking needle, wherein the peripheral surface of the needle seat is provided with at least one guide part, the inner wall surface of the front cover is provided with at least one guide track corresponding to the moving stroke of the at least one guide part, and the outer edge of the at least one guide part and the at least one guide track are in a substantially complementary form. Therefore, the blood taking needle and the needle seat can stably move under the guidance of the guide track, and further the pain of a user generated in the blood taking process is greatly reduced.

Description

Blood collection device with needle seat guiding structure

technical field

The utility model relates to a blood sampling device for the human body surface, in particular to a blood sampling device with a needle seat guiding structure, which can allow the blood collection needle and the needle seat to move stably during the puncture process, and relieve the pain suffered by the user feel to a minimum.

Background technique

When patients with diabetes or chronic diseases perform blood tests, they usually use a blood collection needle in a blood collection device to puncture the skin of the subject, so that the subject bleeds out a small amount of blood to be collected and tested.

A conventional blood collection device usually has a pen-shaped housing, a front cover assembled in front of the housing, a blood collection needle detachably mounted on a needle holder, and a device capable of driving the needle holder and the blood collection needle to produce linear displacement. Firing unit. Thus, the subject will control the firing unit to drive the lancet to move forward, and make the needle of the lancet protrude from the front cover to pierce the subject's skin to a certain depth and then return. During use, the subject's pain comes from the shaking of the blood collection needle during the puncture process, especially the violent shaking when the blood collection needle punctures to the maximum stroke, which often makes the subject miserable. The reason is that the blood collection needle is not firmly arranged on the needle seat, and the needle seat is not stable enough in the process of driving, which still needs to be improved.

Contents of the invention

In view of the above problems, the main purpose of this utility model is to provide a blood collection device with a needle seat guiding structure, the needle seat can effectively position the blood collection needle, and can generate stable displacement to reduce the pain of the subject.

In order to achieve the above purpose, the utility model provides a blood collection device with a needle seat guiding structure, which is characterized in that it includes a front cover, which can be detachably assembled in front of a housing; a blood collection needle, which has a shaft and a a needle head, the needle head is arranged on one end surface of the shaft; a needle seat, which can be linearly moved inside the housing, is used to clamp and fix part or all of the shaft of the blood collection needle, wherein the The outer peripheral surface of the needle seat has at least one guide part, and the inner wall surface of the front cover is provided with at least one guide track corresponding to the movement stroke of the at least one guide part, and the outer edge of the at least one guide part is in contact with the The at least one guiding track is substantially complementary.

In the above-mentioned technical solution of the utility model, the front end of the needle seat is provided with a cylindrical accommodation part to accommodate the shaft of the blood collection needle, and the middle section of the accommodation part is provided with a cutout to define two clamping parts. pieces, and the two clamping pieces position the shaft of the blood collection needle.

The cutout is H-shaped.

The number of the at least one guide part and the at least one guide track is one, the guide part is set in a ring shape, and the cross section of the guide track is circular.

The guide part is arranged on the front section of the outer circumference of the needle holder.

The at least one guiding part is a plurality of linear protrusions extending along the moving direction of the needle base.

Each of the guide tracks is a plurality of linear grooves corresponding to the number of each of the linear protrusions

Both the at least one guiding portion and the at least one guiding track are three in number.

The outer edges of the guide parts are substantially located on the same circumference, the number of the at least one guide track is one, and its cross section is circular.

The at least one guiding part is a plurality of linear grooves extending along the moving direction of the needle base, and the at least one guiding track is a plurality of linear protrusions corresponding to the number of the linear grooves.

The front cover is composed of a hollow tube and a bushing accommodated inside the hollow tube, and the at least one guide track is arranged on the inner wall of the bushing.

The sleeve is integrally integrated with the hollow tube.

The front cover also has a cover sleeved on the front end of the hollow tube.

The distance between the at least one guide portion and the at least one guide rail is between 0.01mm and 0.3mm.

With the above technical solution, when the blood collection device of the present invention uses the blood collection needle to perform blood sampling operations, the blood collection needle will be stably clamped by the needle holder, and the needle holder and the blood collection needle will move stably under the guidance of the guide track, It can greatly reduce the shaking during the puncture process and reduce the pain of the test subject.

Description of drawings

Fig. 1 is the schematic diagram of the utility model first embodiment;

Fig. 2 is a three-dimensional exploded view of the first embodiment of the utility model;

Fig. 3 is a longitudinal sectional view along line 3-3 in Fig. 1;

Fig. 4 is a transverse sectional view along line 4-4 in Fig. 3;

Fig. 5 is a longitudinal sectional view of the second embodiment of the utility model;

Fig. 6 is a transverse sectional view along line 6-6 in Fig. 5;

7 is a longitudinal sectional view of a third embodiment of the present invention;

Fig. 8 is a transverse sectional view along line 8-8 in Fig. 7;

Fig. 9 is a transverse sectional view of the fourth embodiment of the present utility model.

Detailed ways

In order to describe the structure, features and effects of the present utility model in detail, the following preferred embodiments are given below together with the accompanying drawings.

As shown in Figures 1 to 2, the blood collection device 10 provided by the first embodiment of the present invention includes a front cover 20, a blood collection needle 30 and a needle holder 40; wherein, the front cover 20 is detachably assembled in a housing Body 11 front, and is made up of a hollow tube 21, a cover body 22 that is arranged on the front end of the hollow tube 21, and a shaft sleeve 23 accommodated inside the hollow tube 21. The blood collection needle 30 is accommodated at the front end of the needle holder 40, and the needle holder 40 is linearly movable and arranged in the casing 11, and can be driven by a firing unit (not shown in the figure) to move linearly. Since the specific structure of the firing unit is not The key points of the present utility model are not described in detail here.

The blood collection needle 30 is a user-replaceable part and has a needle 31 and a shaft 32 , wherein the needle 31 is disposed on an end surface of the shaft 32 . The needle base 40 is a single component in this embodiment, and a cylindrical housing portion 41 is provided at the front end to accommodate most or all of the shaft 32 of the blood collection needle 30, and the middle section of the housing portion 41 is provided with an H-shaped cutout 42 to define There are two clamping pieces 43 , so the two clamping pieces 43 can elastically clamp the shaft 32 of the blood collection needle 30 to effectively position the blood collection needle 30 . When the user drives the blood collection needle 30 and the needle seat 40 through the firing unit, as shown in FIG. 3 , the shaft sleeve 23 is provided with a channel 24 so that the blood collection needle can move smoothly and the needle head 31 protrudes from the cover 22 .

In addition, as shown in FIG. 2 and FIG. 3 , an annular guide portion 44 is protrudingly provided on the front section of the outer periphery of the needle holder 40 , and a circular guide portion is provided on the inner wall surface of the sleeve 23 corresponding to the movement stroke of the guide portion 44 . The guide track 25, wherein the outer edge of the guide portion 44 is substantially complementary to the guide track 25, as shown in FIG. 4 . In this embodiment, the cross-sectional shapes of the guiding portion 44 and the guiding rail 25 are both set to be circular, and the distance between the guiding portion 44 and the guiding rail 25 is 0.01-0.3 millimeters (mm).

It is worth mentioning that the guide part 44 and the guide rail 25 are not limited to the circular shape of the foregoing embodiment, and can also be changed to other shapes such as triangle or rectangle, and the guide part 44 can also be arranged on the outer peripheral surface of the needle holder. Other positions, for example, are arranged at the front section and/or the rear section of the outer peripheral surface of the needle holder accommodating part. In addition, the shaft sleeve 23 can also be reconfigured on the cover body 22 , or be integrated with the hollow tube 21 into a single component. The needle base 40 can also be assembled from a plurality of components, and the cutout 42 on the needle base 40 can also be changed into other shapes.

When the user utilizes the blood collection device 10 of the present utility model, since the blood collection needle 30 is firmly arranged in the accommodating part 41 of the needle holder 40, the needle holder 40 can be accurately guided by the guide rail 25 through the guide part 44, ensuring The moving process of the blood collection needle 30 and the needle holder 40 is smooth, so the shaking during the moving process can be greatly reduced, so as to reduce the pain suffered by the user, and even approach the painless effect.

As shown in FIG. 5 , the blood sampling device 10 provided by the second embodiment of the present invention is roughly the same in structure as the previous embodiment, the main difference is that the guide part 44 of the needle holder 40 is changed to move along the needle holder 40 The number of linear protrusions extending in the same direction is set to three and arranged at an equal angle on the outer peripheral surface of the needle holder 40 . Since the outer edges of these guide portions 44 are substantially located on the same circumference, as long as the distance between the aforementioned circumference diameter and the inner diameter of the guide rail 25 is well controlled, the guiding effect of the guide rail 25 can still be maintained.

As shown in Fig. 7 and Fig. 8, the blood sampling device 10 of a third embodiment provided by the present invention differs from the aforementioned second embodiment in that the guide rail 25 inside the shaft sleeve 25 is changed to There are three linear grooves to match the three guiding parts 44 of the needle holder 40 . In addition, the utility model provides a fourth embodiment again, as shown in Figure 9, its structural difference with the foregoing third embodiment is: the concave-convex shape of the guide part 44 and the guide track 25 are exchanged, that is, the The guide part 44 is set as a groove and the guide track 25 is set as a linear convex line, both of which can achieve the purpose of the utility model. Furthermore, the number of guide parts is not limited to three, and other number arrangements are also possible.

The utility model can improve the stability of the needle holder during the moving process through the needle holder guide structure formed by the guide part of the needle holder and the guide track of the shaft sleeve, and the blood collection needle of the utility model is firmly arranged on the needle holder Therefore, the degree of shaking of the blood collection needle during puncture will be greatly reduced, so as to achieve the purpose of reducing the pain of the test subject.

Claims (14)

1. a blood-taking device for tool needle stand guide structure, is characterized in that including:

One protecgulum, is assembled in a housing front removedly;

One blood taking needle, has a shaft and a syringe needle, and an end face of described shaft is located at by described syringe needle;

One needle stand, linearly can be arranged at described enclosure interior movably, to grip the part or all of shaft of described blood taking needle, wherein, described needle stand outer peripheral face has at least one guidance part, the shift motion that the internal face of described protecgulum corresponds to described at least one guidance part is provided with at least one guide rails, and the outer rim of described at least one guidance part and described at least one guide rails are the kenels of essence complementation.

2. the blood-taking device of tool needle stand guide structure as claimed in claim 1, it is characterized in that: described needle stand front end is provided with a holding part of tubular to hold the shaft of described blood taking needle, and described holding part stage casing is provided with a kerf and defines two holding pieces, described two holding pieces locate the shaft of described blood taking needle.

3. the blood-taking device of tool needle stand guide structure as claimed in claim 2, is characterized in that: described otch is H-shaped.

4. the blood-taking device of tool needle stand guide structure as claimed in claim 1, is characterized in that: the quantity of described at least one guidance part and described at least one guide rails is one, and described guidance part is set to circular, and the section of described guide rails is circular.

5. the blood-taking device of tool needle stand guide structure as claimed in claim 4, is characterized in that: described guidance part is arranged at the outer peripheral face leading portion of described needle stand.

6. the blood-taking device of tool needle stand guide structure as claimed in claim 1, is characterized in that: described at least one guidance part is the multiple linear raised line extended along described needle stand moving direction.

7. the blood-taking device of tool needle stand guide structure as claimed in claim 6, is characterized in that: described each guide rails is multiple straight-line grooves of corresponding described each linear raised line quantity

8. the blood-taking device of tool needle stand guide structure as claimed in claim 7, is characterized in that: the quantity of described at least one guidance part and described at least one guide rails is three.

9. the blood-taking device of tool needle stand guide structure as claimed in claim 6, is characterized in that: the outer rim of described each guidance part is positioned in fact same circumference, and the quantity of described at least one guide rails is one and its section is circle.

10. the blood-taking device of tool needle stand guide structure as claimed in claim 1, it is characterized in that: described at least one guidance part is the multiple linear grooves extended along described needle stand moving direction, described at least one guide rails is the multiple linear raised line of corresponding described each linear grooves quantity.

The blood-taking device of 11. tool needle stand guide structures as described in any one of claim 1 to 10, it is characterized in that: described protecgulum is by a hollow pipe, and one be placed in described hollow tube axle sleeve composition, described at least one guide rails is arranged at the internal face of described axle sleeve.

The blood-taking device of 12. tool needle stand guide structures as claimed in claim 11, is characterized in that: described axle sleeve is that integrated is in described hollow pipe.

The blood-taking device of 13. tool needle stand guide structures as claimed in claim 11, is characterized in that: described protecgulum also has a lid and is sheathed on described hollow pipe front end.

The blood-taking device of 14. tool needle stand guide structures as described in any one of claim 1 to 10, is characterized in that: the spacing of described at least one guidance part and described at least one guide rails is between 0.01 ~ 0.3 millimeter.