CN209285519U - It is a kind of by elastic dilatation come the hemostix of spring clip tail portion - Google Patents

Abstract

It is a kind of by elastic dilatation come the hemostix of spring clip tail portion, including shell and spring, it is characterized by: the cylinder back-end of shell is equipped with deck, the side wall of deck is equipped with block tongue, in its natural state, the distance that inserts of block tongue top and opposite deck side wall is less than spring diameter, and the bottom wall of deck is equipped with long slot hole, which is divided into deck and is made of at least two valve pedestals.In the assembled condition, after having the expansion pin insertion long slot hole of a wedge shape on installation station, deck is forced to be expanded in radial elastic, when distance can be inserted more than or equal to spring diameter, spring tail portion is fallen into deck, and when shell and spring withdraw the installation station, deck is in radial elastic shrinkage, block tongue is caught in the gap of spring tail portion, by spring tail portion clamping lock on deck.This programme can be fitted into mechanization and Automated assembly requirement in clamping part when efficiently solving spring-compressed to half stroke.

Description

It is a kind of by elastic dilatation come the hemostix of spring clip tail portion

Technical field

The utility model relates to Medical blood sampling equipment field, in particular to a kind of disposable blood taking device of included ejection mechanism (also known as " blood taking needle ").This hemostix can by shell tail portion elastic dilatation come clamping lock flexible tail, its main feature is that: both may be used Housing and tail-hood to be combined as a whole, spring tail portion fixed clamp is wanted when saving a part, and can satisfy assembling It asks.

Background technique

Disposable blood taking device carries blood taking needle and ejection mechanism, and it is small in size with its, using safe, easy to operate for characteristic It is deep to be welcome by medical staff and patient.It is largely used in each medical institutions and diabetic for many years.

Typical disposable blood taking device is usually made of push away hair device, needle core, spring, housing and tail-hood.In industrial mass Amount production in, except spring and in addition to other components be injection-moulded plastic part, by mold injection molding, finally pass through semi-mechanization again Or full automatic mechanical product line group dresses up product.But in hemostix manufacturing field, due to being required in assembling process It (is not that spring is all just packed into clamping after compression that spring tail portion, which should be just fitted into respective clamp portion, when spring-compressed is to half stroke In portion, and spring-compressed to half stroke when still in soft condition), this is the requirement of motorization assembly.It limits in this way The fixed form of spring tail portion, for example not can guarantee the reliability that spring assembles usually using structures such as tight fit and grabs.

Chinese patent CN202654134U bulletin authorizes the utility model patent of one entitled " hemostix bottom cover ".It should Patent specially designs the structure for having spring clip to solve the problems, such as that spring tail portion grips on the bottom cover of blood taking needle.But There are still following deficiencies in practical applications: 1. designs combined with bottom cover (tail-hood) assembly using syringe (housing), wherein needle Cylinder and bottom cover are two parts, are manufactured by two secondary molds, amount of parts is more；2. structure is complicated for bottom cover, lead to mold Structure is complicated, at high cost；3. the reliability of spring tail portion indentation clamping part is difficult to ensure in mechanization and automatic assembling.

For this purpose, how to solve above-mentioned technical problem, it is simple to design a kind of not only structure, but also convenient for the spring tail portion clamping lock of assembly The problem of structure is those skilled in the art's concern.

Summary of the invention

In view of above the shortcomings of the prior art, the utility model provides one kind by elastic dilatation come spring clip tail The hemostix in portion, its purpose is to solve that clamping can be packed into when spring is compressed to half stroke in mechanization and automatic assembling The problem of portion.

In order to achieve the above objectives, the technical solution adopted in the utility model is: one kind is by elastic dilatation come spring clip The hemostix of tail portion, including shell and spring, innovation are:

The main body of the shell is tube structure, and the front end of cylinder is opening, is equipped in cylinder and is used to mounted elastically insert Channel is filled, the rear end of cylinder is equipped with elastic dilatation end seat, and elastic dilatation end seat is an integral molding structure with cylinder, elastic dilatation end It seats against inner barrel one end and is provided with deck, deck has a side wall and bottom wall for retaining spring tail portion, on the side wall of deck Equipped with block tongue, block tongue is the bulge-structure on deck side wall, and in its natural state, block tongue top is inserted with opposite deck side wall Dress distance is less than spring diameter, and the bottom wall of deck is equipped with long slot hole, which through cylinder back-end and is divided into deck It is made of at least two valve pedestals.

The related content and change interpretation of above-mentioned technical proposal are as follows:

1. in above scheme, " preceding " expression hemostix needle point direction in " front end " and " front ", then table Show the direction opposite with " preceding ".

2. in above scheme, " hemostix " is also known as " blood taking needle " and means the disposable of included blood taking needle and ejection mechanism Blood taking instrument.This programme hemostix is usually made of push away hair device, needle core, spring, shell and torsion cap or nut cap.Due to pushing away hair Device, needle core and torsion cap or nut cap are unrelated with this programme essentiality content, so omitting it.

3. in above scheme, in the assembled condition, after long slot hole is inserted into for the expansion pin of wedge shape in an outside, forcing by extremely The deck that few two valve pedestals are constituted is expanded in radial elastic, when deck radial elastic be expanded to it is described can insert distance be greater than or When equal to spring diameter, spring tail portion is fallen into deck, and after the expansion pin withdraws long slot hole, deck is received in radial elastic Contracting, block tongue are caught in the gap of spring tail portion, and by spring tail portion clamping lock on deck.This programme is inserted using the expansion pin of wedge shape Enter long slot hole and carry out dilatational elasticity expansion end seat from inside, to realize that assembly spring is preferable assembly method.But the present invention is not Limit office can also apply chucking power from both ends outside long slot hole using a clamping device, deck is forced to expand in radial elastic in this , spring is reassembled, then clamping device is removed, and then deck is restored in radial elastic shrinkage.

Utility model works principle and effect are: in order to solve spring-compressed in hemostix mechanization and automatic assembling The problem of outer casing bottom clamping part can be packed into when to half stroke, this programme specially devises one in the rear end of casing cylinder Elastic dilatation end seat, the elastic dilatation end seat have the following characteristics that first, and elastic dilatation end seat and cylinder are integrally formed knot Structure reduces one with original syringe (housing) compared with bottom cover (tail-hood) assembles Combination Design with shell integrated injection molding A part saves a secondary mold；Second, elastic dilatation end seat is provided with deck by inner barrel one end, on the side wall of deck Equipped with block tongue, in its natural state, the distance that inserts of deck is less than spring diameter, and the bottom wall of deck, which will be equipped with long slot hole, to be blocked Seat is divided into be made of at least two valve pedestals.When mechanization and automatic assembling spring, it is inserted into using a wedge-shaped expansion pin On the one hand long slot hole can be used to position shell, another aspect expansion pin can force deck to be expanded in radial elastic, when can insert When dress distance is greater than or equal to spring diameter, spring tail portion is fallen into deck, when shell withdraws the assembly station of corresponding expansion pin When, in radial elastic shrinkage, block tongue is caught in the gap of spring tail portion deck, and by spring tail portion clamping lock on deck.This reality It is reasonable with new design, it is skillfully constructed, the amount of parts of hemostix can not only be effectively reduced, and can effectively solve bullet Spring can be fitted into respective clamp portion when being compressed to half stroke (be not that spring is all just fitted into clamping part after compression, and bullet Still in soft condition when spring is compressed to half stroke) motorization assembly requirement.

Detailed description of the invention

Fig. 1 is the perspective view of spring in the utility model hemostix；

Fig. 2 is the perspective view of shell in the utility model hemostix；

Fig. 3 is the perspective view of the utility model assembly fixture；

Fig. 4 is that the utility model assembles schematic diagram；

Fig. 5 is the partial enlarged view in Fig. 4；

Fig. 6 is the shell and spring cross-sectional view after the utility model assembly；

Fig. 7 is the perspective view of the utility model shell.

Label declaration in the figures above is as follows:

1. spring；2. shell；3. assembly fixture；4. taper pin face；5. block tongue；6. inserting channel；7. guiding rib；8. guiding Inclined-plane；9. long slot hole；10. baffle；11. open；12. expansion pin；13. elastic dilatation end seat；14. deck.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and embodiments:

Embodiment: it is a kind of by elastic dilatation come the hemostix of spring clip tail portion

The present embodiment hemostix is the disposable blood taking device tool of a kind of included blood taking needle and ejection mechanism, usually by pushing away hair Device, needle core, spring, shell and torsion cap composition, wherein needle core is an integral molding structure with cap is turned round.Due to push away hair device, needle core with And turning round cap is the prior art, and unrelated with this programme essentiality content, for the ease of clear and accurate embodiment this programme Essentiality content, so using these components as omission.

Referring to Fig. 1-Fig. 7, which includes that shell 2(is shown in Fig. 2) and spring 1(see Fig. 1).

The main body of the shell 2 is tube structure, and the front end of cylinder is that opening 11(is shown in Fig. 2), interior be equipped with of cylinder is used to fill Inserting channel 6(with spring 1 is shown in Fig. 4), the rear end of cylinder is equipped with elastic dilatation end seat 13(and sees Fig. 5), elastic dilatation end seat 13 It is an integral molding structure with cylinder, elastic dilatation end seat 13 is provided with deck 14(by inner barrel one end and sees Fig. 5), deck 14 has Have the side wall and bottom wall for 1 tail portion of retaining spring, the side wall of deck 14 is equipped with block tongue 5(and sees Fig. 5), block tongue 5 is deck 14 Bulge-structure on side wall, and block tongue 5 is unilateral setting on 14 side wall of deck (see Fig. 4 and Fig. 7).In its natural state, The distance that inserts of 5 top of block tongue and 14 side wall of opposite deck is less than 1 diameter of spring, and the bottom wall of deck 14 is equipped with long slot hole 9 (see Fig. 5 and Fig. 7), which runs through cylinder back-end and be divided into deck 14 is made of two valve pedestals.

The long slot hole 9 is I-shaped (see figure 7).9 side wall of long slot hole is equipped with baffle 10, and 10 quantity of baffle is two A, two baffles 10 are spaced setting on 9 length direction of long slot hole, wherein two baffles 10 are unilateral on 9 side wall of long slot hole (see figure 7) is set.

The inserting channel 6 along circumferentially spaced four guiding ribs 7 limit of cylinder inboard wall by constituting, every guiding rib 7 front is equipped with guiding surface 8, leads to deck 14 with this 1 tail portion of guide springs.

(see figure 4) in the assembled condition, when shell 2 is located at mechanization or Automated assembly station, have one outside be The expansion pin 12(assembly fixture 3 in wedge-shaped (with taper pin face 4)) be inserted into long slot hole 9 after, force the deck 14 being made of two valve pedestals Expanded in radial elastic, when deck 14 radial elastic be expanded to it is described can insert distance and be greater than or equal to 1 diameter of spring when, bullet 1 tail portion of spring is fallen into deck 14, and when shell 2 and spring 1 withdraw the assembly station, expansion pin 12 withdraws long slot hole 9, deck 14 In radial elastic shrinkage, block tongue 5 is caught in the gap of 1 tail portion of spring, and by 1 tail portion clamping lock of spring (see figure 6) on deck 14.

Other performances and variation below for the utility model are explained as follows:

1. in above-described embodiment, block tongue 5 is quantitatively one, and be on 14 side wall of deck unilateral setting (see Fig. 4 and Fig. 7).But the utility model is not limited to this, block tongue 5 can using multiple, and on 14 side wall of deck at unilateral or Bilateral setting.

2. in above-described embodiment, set that there are two baffles 10 on 9 side wall of long slot hole, two baffles 10 are on 9 side wall of long slot hole For unilateral setting (Fig. 7).But the utility model is not limited to this, and baffle 10 can be one, three or three or more, in length Arrangement on 9 side wall of slot can be using unilateral or bilateral setting.

3. in above-described embodiment, long slot hole 9 is I-shaped (see figure 7).But the utility model is not limited to this, the length Slot 9 can be the shapes such as linear type, arc, fold-line-shaped.This be it will be appreciated by those skilled in the art that.It is practical new at this In type, the effect key of long slot hole 9 is to run through cylinder back-end and be divided into deck 14 to be made of at least two valve pedestals, in this way The deck 14 of design just has elastic dilatation ability in the radial direction of cylinder.

4. in above-described embodiment, the inserting channel 6 along circumferentially spaced four guiding ribs 7 of cylinder inboard wall by limiting It constitutes.But the utility model is not limited to this, and guiding rib 7 can be three, five, and even more, this is those skilled in the art What member was understood that.

5. being to be inserted into long slot hole 9 from inside come dilatational elasticity expansion end using the expansion pin 12 of wedge shape in above-described embodiment Seat 13, to realize that assembly spring is preferable assembly method.But the unlimited office of the present invention can also use a clamping device in this Both ends apply chucking power outside from long slot hole, force deck to be expanded in radial elastic, reassemble spring, then clamping device is removed It removes, then deck is restored in radial elastic shrinkage.

The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention. All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it It is interior.

Claims (10)

1. it is a kind of by elastic dilatation come the hemostix of spring clip tail portion, including shell (2) and spring (1), it is characterised in that:

The main body of the shell (2) is tube structure, and the front end of cylinder is open (11), is equipped in cylinder and is used to assemble spring (1) rear end in inserting channel (6), cylinder is equipped with elastic dilatation end seat (13), and elastic dilatation end seat (13) is integrated with cylinder Molding structure, elastic dilatation end seat (13) are provided with deck (14) by inner barrel one end, and deck (14) has for positioning bullet The side wall of the side wall and bottom wall of spring (1) tail portion, deck (14) is equipped with block tongue (5), and block tongue (5) is convex on deck (14) side wall Structure is played, in its natural state, the distance that inserts of block tongue (5) top and opposite deck (14) side wall is less than spring (1) diameter, The bottom wall of deck (14) is equipped with long slot hole (9), which through cylinder back-end and is divided into deck (14) by least Two valve pedestals are constituted.

2. hemostix according to claim 1, it is characterised in that: the block tongue (5) is unilateral on deck (14) side wall Setting.

3. hemostix according to claim 1, it is characterised in that: the block tongue (5) is bilateral on deck (14) side wall Setting.

4. hemostix according to claim 1, it is characterised in that: long slot hole (9) side wall is equipped with baffle (10).

5. hemostix according to claim 4, it is characterised in that: baffle (10) quantity is two, two baffles (10) on long slot hole (9) length direction be spaced setting, wherein two baffles (10) be on long slot hole (9) side wall it is unilateral or The bilateral setting of person.

6. hemostix according to claim 1, it is characterised in that: the long slot hole (9) is linear type.

7. hemostix according to claim 1, it is characterised in that: the long slot hole (9) is I-shaped.

8. hemostix according to claim 1, it is characterised in that: the long slot hole (9) is arc.

9. hemostix according to claim 1, it is characterised in that: the long slot hole (9) is fold-line-shaped.

10. hemostix according to claim 1, it is characterised in that: the inserting channel (6) is by between cylinder inboard wall circumferential direction It is constituted every at least three guiding rib (7) limits of setting, the front of every guiding rib (7) is equipped with guiding surface (8), is drawn with this Guided missile spring (1) tail portion leads to deck (14).