CN201333040Y

CN201333040Y - Disposable self-destroyed blood taking needle

Info

Publication number: CN201333040Y
Application number: CNU2009201414511U
Authority: CN
Inventors: 王国平
Original assignee: Individual
Current assignee: SUZHOU YUDIAN MEDICAL DEVICES Co.,Ltd.
Priority date: 2009-01-07
Filing date: 2009-01-07
Publication date: 2009-10-28
Anticipated expiration: 2019-01-07

Abstract

The utility model discloses a disposable self-destroyed blood taking needle. An elastic arm which butts on a guide block and can push the guide block into the middle part of a casing is arranged on a trigger body; a clamping groove is arranged at the top of the casing; a clamping hook which can be correspondingly clamped in the clamping groove is arranged on the trigger body; through the clamping hook, the clamping hook can be prevented from separating from the clamping groove; an extension inclined surface which can extends the elastic arm so as to detach the elastic arm from the guide block is also arranged inside the casing; an extension rod which is used for limiting the position of a spring when the trigger body is destroyed relatively to the casing is fixed at the bottom end of the spring; and the free end of the extension rod is arranged oppositely to the wall of the bottom end of the trigger body. The blood taking needle can be conveniently used; as long as the trigger body is pressed, the extension inclined surface extends the elastic arm and the guide block is detached from the elastic arm; a needle body passes through a needle hole to pierce skin; and subsequently, the needle body retracts into the trigger body and can not come off because the trigger body limits the position of the extension rod. The disposable self-destroyed blood taking needle has high reliability and can not cause strong prickling sensation when in use.

Description

The disposable self-destructing blood taking needle

Technical field

This utility model relates to a kind of medical disposable auto-disable formula blood taking needle, and this blood taking needle in use suffers self-destruction destruction, not reproducible use.

Background technology

In the prior art, various forms of medical disposable auto-disable formula blood taking needles are arranged, their structures are small and exquisite, safe and convenient to use.These blood taking needles are followed " primary emission, principle that can not reuse ", connect by elastic component between trigger mechanism and the housing, and compression elastic piece at first during use utilizes the inertia of elastic-restoring force and needle body that human body is pierced through again; Usually also be provided with between needle body and the housing and destroy mechanism, this destruction mechanism is destroyed thereby the blood taking needle inefficacy after the emission once.

Existing destruction mechanism, structure is comparatively complicated mostly, and mechanism can appear in the use destroying once in a while and can not ruined deficiency, in case destroy failure mechanisms, the needle body long term exposure is easy to cause hidden danger such as hematopathy cross infection outside.

Must be destroyed in order to ensure destroying mechanism after the emission once, the elastic force of existing blood taking needle is all bigger, and this can cause bigger pain to patient.

Summary of the invention

The technical problems to be solved in the utility model provides the reliable and comfortable disposable self-destructing blood taking needle easy to use of a kind of structural safety.

The technical scheme that this utility model adopted is: a kind of disposable self-destructing blood taking needle comprises:

A housing, described housing is bottom sealing, top end opening on its length direction, have bearing of trend in this housing and be the chute along the shell length direction;

Be arranged on the intravital spring of described shell;

Be connected the vertical connecting portion of described spring, be fixed with the guide block that matches with described chute on the described connecting portion;

Be fixed on the needle body on the described connecting portion;

Be plugged in the interior trigger body of top end opening of described housing, offer pin hole on the described trigger body, the relative housing of described trigger body has state to be used and collapse state;

Described trigger body is provided with the elastic arm that leans with described guide block and guide block can be pushed housing middle part, the top of described housing is provided with draw-in groove, and described trigger body is provided with can establish and prevent the grab that the two is separated with the corresponding card of described draw-in groove;

Also be provided with in the described housing and described elastic arm can be expanded and then make the expansion inclined-plane that elastic arm and guide block are separated;

The bottom of described spring is fixed with when the relative housing of trigger body is in collapse state carries out spacing extension rod to spring, and the base end wall of the free end of described extension rod and trigger body is oppositely arranged.

Because the employing of technique scheme, this blood taking needle is easy to use, only needs the squeezing trigger body, and elastic arm is expanded on the expansion inclined-plane, guide block and elastic arm disengaging, and under the effect of inertia of the restoring force of spring and connecting portion, needle body is gone out pin hole and is stabbed skin; Subsequently, under the restoring force of spring, needle body withdrawal trigger body, because trigger body spacing to extension rod makes spring be limited in the housing, needle body can not deviate from, this destruction mechanism reliability is very high.Sensation of pricking was not strong when this utility model used.

Description of drawings

Fig. 1 is a three-dimensional broken away view of the present utility model;

Fig. 2 is an another three-dimensional broken away view of the present utility model, and elastic arm and guide block lean;

Fig. 3 is complete section figure of the present utility model, and the trigger body is installed on housing;

Fig. 4 is complete section figure of the present utility model, and the trigger body is installed on the housing, and blood taking needle is in state to be used;

Fig. 5 is complete section figure of the present utility model, and finger is pushed the trigger body, and elastic arm is expanded the inclined-plane expansion;

Fig. 6 is complete section figure of the present utility model, and after the elastic arm expansion, guide block separates with elastic arm, and under the effect of inertia of spring restoring force and connecting portion, needle body passes pin hole;

Fig. 7 is complete section figure of the present utility model, and blood taking needle is in the collapse state after the primary emission,

Wherein, 1, housing, 11, guide rod, 12, chute, 13, the expansion inclined-plane, 14, draw-in groove, 2, spring, 21, connecting portion, 22, guide block, 23, extension rod, 3, needle body, 4, the trigger body, 41, elastic arm, 42, grab, 43, pin hole, 5, end cap.

The specific embodiment

A kind of disposable self-destructing blood taking needle comprises:

A housing 1, described housing 1 is bottom sealing, top end opening on its length direction, and described housing 1 internal fixation has guide rod 11, and the formation bearing of trend is the chute 12 along housing 1 length direction between the described guide rod 11;

Be arranged on the spring 2 in the described housing 1;

Be connected described spring 2 vertical connecting portions 21, be fixed with the guide block 22 that matches with described chute 12 on the described connecting portion 21;

Be fixed on the needle body 3 on the described connecting portion 21;

Be plugged in the interior trigger body 4 of top end opening of described housing 1, offer pin hole 43 on the described trigger body 4, described trigger body 4 relative housings 1 have state to be used and collapse state;

Described trigger body 4 is provided with and leans with described guide block 22 and guide block 22 can be pushed the elastic arm 41 at housing 1 middle part, the top of described housing 1 is provided with draw-in groove 14, and described trigger body 4 is provided with and can establishes and prevent the two grab that is separated 42 with described draw-in groove 14 corresponding cards;

Also be provided with in the described housing 1 and described elastic arm 41 can be expanded and then make the expansion inclined-plane 13 that elastic arm 41 and guide block 22 are separated;

The bottom of described spring 2 is fixed with when trigger body 4 relative housings 1 are in collapse state carries out spacing extension rod 23 to spring 2, and the base end wall of the free end of described extension rod 23 and trigger body 4 is oppositely arranged;

The top of described housing 1 also is provided with and is used for trigger body 4 is enclosed in end cap 5 in the housing 1.

Referring to Fig. 3 to Fig. 7, the whole mechanism schematic diagram of this blood taking needle.

Referring to Fig. 3, when this blood taking needle of assembling, at first make elastic wall 41 be resisted against on the guide pad 22, guide pad 22 is depressed into housing 1 medium position, spring 2 is compressed;

Referring to Fig. 4, along with trigger body 4 gos deep into housing 1, hear " click is rattled away " one, grab 42 fastens with draw-in groove 14, can not continue to promote trigger body 4 again (otherwise will trigger guide pad 22) this moment, and trigger body 4 can not be deviate from from housing 1, and this moment, blood taking needle was in stable state to be used;

Referring to Fig. 5, when light finger light press trigger body 4, expansion inclined-plane 13 is with elastic arm 41 expansions, and guide pad 22 is separated with elastic arm 41;

Referring to Fig. 6, under the effect of inertia of the restoring force of spring 2 and connecting portion 21, needle body 3 stretches out, stabs skin from pin hole 43, the base end wall of trigger body 4 withstands extension rod 23 at this moment, trigger body 4 is held extension rod 23, motion to connecting portion 21 produces cushioning effect, can alleviate the pain of human body;

Referring to Fig. 7, under the restoring force of spring 2, needle body 3 is got back within the trigger body 4, at this moment, because the base end wall of trigger body 4 is spacing to extension rod 23, spring 2 is limited in housing 1 bottom, and needle body 3 can not deviate from from pin hole 43, hemostix after having guaranteed to use can not hurted sb.'s feelings, and safety is guaranteed.

Claims

1, a kind of disposable self-destructing blood taking needle comprises:

A housing (1), described housing (1) is bottom sealing, top end opening on its length direction, have bearing of trend in this housing (1) and be the chute (12) along housing (1) length direction;

Be arranged on the spring (2) in the described housing (1);

Be connected the vertical connecting portion of described spring (2) (21), be fixed with the guide block (22) that matches with described chute (12) on the described connecting portion (21);

Be fixed on the needle body (3) on the described connecting portion (21);

Be plugged in the interior trigger body (4) of top end opening of described housing (1), offer pin hole (43) on the described trigger body (4), described trigger body (4) housing (1) relatively has state to be used and collapse state;

It is characterized in that: described trigger body (4) is provided with the elastic arm (41) that leans with described guide block (22) and guide block (22) can be pushed housing (1) middle part, the top of described housing (1) is provided with draw-in groove (14), and described trigger body (4) is provided with can establish and prevent the two grab that is separated (42) with the corresponding card of described draw-in groove (14);

Also be provided with the expansion inclined-plane (13) that described elastic arm (41) can be expanded and then make that elastic arm (41) and guide block (22) are separated in the described housing (1);

The bottom of described spring (2) be fixed with when trigger body (4) relatively housing (1) when being in collapse state spring (2) is carried out spacing extension rod (23), the base end wall of the free end of described extension rod (23) and trigger body (4) is oppositely arranged.

2, disposable self-destructing blood taking needle according to claim 1 is characterized in that: the top of described housing (1) also is provided with and is used for trigger body (4) is enclosed in the interior end cap (5) of housing (1).

3, disposable self-destructing blood taking needle according to claim 1 is characterized in that: described housing (1) internal fixation has guide rod (11), forms described chute (12) between the described guide rod (11).