CN104983432A - A front pressure blood collection needle device - Google Patents

Abstract

The invention discloses a front-pressing type blood taking needle device which comprises a shell, a sliding sleeve and a needle body, the shell comprises an upper half shell and a lower half shell which are clamped with each other, a needle head is arranged at the front end of the needle body, a first guide limiting groove which is used for allowing the sliding sleeve to move axially and the front end of the sliding sleeve to extend out of the shell is arranged in the inner cavity of the shell, a second guide limit groove for the axial movement of the needle body is arranged in the sliding sleeve, an elastic buckle which is propped against the rear wall of the sliding sleeve during assembly is arranged on the needle body, a tripping bulge which is used for separating the elastic buckle on the needle body from the back wall of the sliding sleeve and entering the sliding sleeve when the front end of the sliding sleeve retracts into the shell is arranged in the shell, a spring used for pushing the needle body to move forwards so that the needle head pierces out of the shell from the front end of the sliding sleeve is connected between the needle body and the bottom of the inner cavity of the shell. The present case simple structure easily realizes, and the component part is few, convenient assembling, and is safe in utilization.

Description

A front pressure blood collection needle device

[technical field]

The invention relates to a front pressure blood collection needle device.

[Background technique]

At present, domestic conventional medical blood collection generally uses a blood collection pen with a disposable blood collection needle. When this blood collection device is in use, the disposable blood collection needle is installed on the head of the blood collection pen, and the disposable blood collection needle is removed after launching. Put on a new blood collection needle and use it again. Since the blood collection needle is repeatedly used, it is easy to cause cross-infection among many people.

The Ministry of Health of my country currently stipulates that when collecting peripheral blood clinically, one person must collect one amount, and multiple people should not share it. However, this disposable blood collection device also has a problem. The disposable blood collection needle is fired once, and it pops out of the blood collection pen after the puncture. And it cannot be retracted. The needle tip after use is exposed outside and needs to be pulled out manually. Since the needle is exposed after blood collection, it is easy for the staff to accidentally pierce it during handling, which will cause cross-infection and there is a certain risk. Security risks. Therefore, various disposable blood collection pens with retractable needles after use have appeared in the prior art, such as the Chinese invention patent "Disposable Safety Blood Collection Needle" with application number 03141465.6, and the Chinese invention patent with patent number ZL200410064671.0 "Needle Point Retractable Disposable Safety Blood Collection Needle and One-shot Safety Blood Collection Pen" both disclose a disposable blood collection needle whose needle head can be retracted after firing, but the structure of the blood collection needle of the above-mentioned patent is not compact enough, and the parts involved There are relatively many parts. For example, in the latter patent, it needs to be used with a blood collection pen at the same time, and the structure is relatively complicated.

Therefore, it is necessary to solve the above problems.

[Content of the invention]

The present invention overcomes the disadvantages of the above-mentioned technologies, and provides a front-pressing type blood collection needle device, which has a simple structure and is easy to implement, has few components, is convenient to assemble, and is safe to use.

To achieve the above object, the present invention adopts the following technical solutions:

A front-pressure blood collection needle device includes a housing 1, a sliding sleeve 2, and a needle body 3. The housing 1 includes an upper half shell 101 and a lower half shell 102 engaged with each other. The front end of the needle body 3 A needle 31 is provided, and the inner cavity of the housing 1 is provided with a first guiding and limiting groove 11 for the axial movement of the sliding sleeve 2 and the front end of the sliding sleeve 2 can protrude out of the housing 1. There is a second guide limit groove 21 for axial movement of the needle body 3, and the needle body 3 is provided with an elastic buckle 32 which is used to abut against the rear wall of the sliding sleeve 2 during assembly. The housing 1 is provided with a mechanism for disengaging the elastic buckle 32 on the needle body 3 from the rear wall of the sliding sleeve 2 and entering the sliding sleeve 2 when the front end of the sliding sleeve 2 is retracted into the housing 1 . The tripping protrusion 12 in the sleeve 2 is connected between the needle body 3 and the bottom of the inner cavity of the housing 1 to push the needle body 3 forward so that the needle head 31 is pushed from the front end of the sliding sleeve 2 Pierce the spring 4 outside the housing 1.

As mentioned above, a front pressure blood collection needle device, the needle body 3 wall is provided with a block 33, the bottom of the inner cavity of the housing 1 is provided with a card slot 13, and one end of the spring 4 is stuck in the card The outside and the other end of the block 33 are stuck in the slot 13 .

As mentioned above, a front pressure blood collection needle device, the release protrusion 12 is provided to facilitate the elastic buckle 32 to be easily released from the The slide guide surface 121 that breaks away from the rear wall of the sliding sleeve 2 and enters the sliding sleeve 2 .

According to the above-mentioned front pressure blood collection needle device, there are two elastic buckles 32, which are arranged in a circular array on the needle body 3, and the release protrusions 12 in the housing 1 correspond to two Each tripping protrusion 12 is provided with a sliding surface 121.

As for the above-mentioned front pressure blood collection needle device, the blood collection needle device further includes a needle cover 5 , the needle cover 5 penetrates through the front end of the sliding sleeve 2 and is sleeved on the needle head 31 .

Compared with prior art, the beneficial effect of the present invention is:

1. The case has few components and is easy to assemble. The inner cavity of the housing is provided with a first guiding and limiting groove to facilitate the axial movement of the sliding sleeve. The sliding sleeve is provided with a second guiding and limiting groove to facilitate the axial movement of the needle body. When assembling, the elastic buckle on the needle body is against the back wall of the sliding sleeve. Under the action of the spring, the front end of the sliding sleeve protrudes out of the shell. Under the action of the protrusion, the needle body moves forward rapidly under the action of the spring, and the needle head is pierced from the front end of the sliding sleeve, thereby piercing the human skin to realize blood collection, and then the needle body drives the needle head back into the In the sliding sleeve, it is safe to use. In addition, the spring does not need to be pre-compressed when the blood collection needle device is assembled, and its stability is good.

2. There is a block on the wall of the needle body, and a slot is provided at the bottom of the inner cavity of the housing, which is convenient for quickly connecting the spring between the needle body and the bottom of the inner cavity of the housing during assembly. In this way, when the spring is compressed When it is stretched, it has a pushing force on the needle body and when it is stretched, it has a pulling force on the needle body, so as to facilitate the thrusting and retraction of the needle head.

3. There is a sliding guide surface on the tripping protrusion in the housing, so that when the front end of the sliding sleeve is retracted into the housing, the elastic buckle on the needle body will slide from the rear wall of the sliding sleeve under the action of the sliding guide surface. disengage and enter the sliding sleeve to ensure that the needle body can move forward relative to the sliding sleeve.

4. There are two elastic buckles, which are arranged in a circular array on the needle body. In this way, the symmetrical arrangement enhances the balance of the needle body.

[Description of drawings]

Figure 1 is an exploded view of the present invention.

Fig. 2 is an exploded view of the casing of the present invention.

Figure 3 is one of the assembly views of the present invention.

Fig. 4 is the second assembly view of the present invention.

Fig. 5 is a sectional view at A-A in Fig. 4 .

[Detailed ways]

The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figures 1-5, a front-pressure blood collection needle device includes a housing 1, a sliding sleeve 2, and a needle body 3. The housing 1 includes an upper half shell 101 and a lower half shell that engage with each other. 102, the front end of the needle body 3 is provided with a needle head 31, and the inner cavity of the housing 1 is provided with a first guiding and limiting groove for the axial movement of the sliding sleeve 2 and the front end of the sliding sleeve 2 can extend out of the housing 1 11. The sliding sleeve 2 is provided with a second guide limit groove 21 for the axial movement of the needle body 3, and the needle body 3 is provided with a back wall for the sliding sleeve 2 to be used for assembly. The elastic buckle 32 of the housing 1 is provided for making the elastic buckle 32 on the needle body 3 behind the sliding sleeve 2 when the front end of the sliding sleeve 2 retracts into the housing 1 The tripping protrusion 12 that breaks away from the wall and enters the sliding sleeve 2, and is connected between the needle body 3 and the bottom of the inner cavity of the housing 1 is used to push the needle body 3 forward to make the needle head 31 pierces the spring 4 outside the housing 1 from the front end of the sliding sleeve 2 .

As mentioned above, in this embodiment, the wall of the needle body 3 is provided with a clamping block 33 , the bottom of the inner cavity of the housing 1 is provided with a clamping groove 13 , and one end of the spring 4 is clamped outside the clamping block 33 And the other end is stuck in the described card slot 13.

As mentioned above, when the spring 4 is compressed, it has a pushing effect on the needle body 3 and when it is stretched, it has a pulling force on the needle body 3, so as to facilitate the thrusting and retracting of the needle head 31 .

As mentioned above, in the present embodiment, the release protrusion 12 is provided with the elastic buckle 32 to be easily disengaged from the sliding sleeve 2 when the front end of the sliding sleeve 2 is retracted into the housing 1 . The guide sliding surface 121 on the rear wall breaks away and enters the sliding sleeve 2 , so as to ensure that the needle body 3 can move forward relative to the sliding sleeve 2 .

As mentioned above, in this embodiment, there are two elastic buckles 32, which are arranged in a circular array on the needle body 3, and there are two release protrusions 12 in the housing 1, each Each tripping protrusion 12 is provided with a sliding guide surface 121, so that the symmetrical arrangement enhances the balance of the needle body 3.

As mentioned above, the blood collection needle device in this case also includes a needle cover 5 , which penetrates through the front end of the sliding sleeve 2 and is sleeved on the needle head 31 .

As mentioned above, as shown in Figure 3, this case has few components and is easy to assemble. The specific assembly process is as follows:

The user first slides the needle body 3 into the second guide limit groove 21 of the sliding sleeve 2 from the rear end, so that the elastic buckle 32 on the needle body 3 is against the rear wall of the sliding sleeve 2, and then the needle body 3. Put the spring 4 on the rear end and install it on the first guide limit groove 11 of the lower half shell 102. One end of the spring 4 is stuck to the block 33 on the wall of the needle body 3 and the other end is stuck to the slot 13 at the rear end of the lower half shell 102. , under the force of the spring 4, the front end of the sliding sleeve 2 extends out of the lower half shell 102 from the front end of the first guide limit groove 11, and the upper half shell 101 is snapped onto the lower half shell 102 and the needle is installed. Set of 5, thus completing the entire assembly process.

As mentioned above, the working principle and usage process of this case are as follows:

When in use, the user first pulls out the needle sheath 5 from the front end of the sliding sheath 2, then presses the front end of the sliding sheath 2 against the skin of the human body, and presses the housing 1 toward the skin of the human body with light force, so that the The sliding sleeve 2 drives the needle body 3 to move backward relative to the housing 1, and the spring 4 is compressed. The rear wall of the sliding sleeve 2 breaks away and enters the sliding sleeve 2, the needle body 3 moves forward rapidly under the force of the spring 4, and the needle 21 is pierced from the front end of the sliding sleeve 2, thereby piercing the human skin to realize blood collection , the needle body 3 drives the needle head 21 to retract into the sliding sleeve 2 under the force of the spring 4 .

As mentioned above, what this case protects is a front-pressure blood collection needle device, which has a simple and easy-to-implement structure, fewer components, convenient assembly, and safe use. All technical solutions with the same or similar structure as this case should be deemed to fall into this case within the scope of protection.

Claims (5)

1. A front-pressure blood collection needle device, characterized in that it includes a housing (1), a sliding sleeve (2), and a needle body (3), and the housing (1) includes an engaged upper half shell (101) and the lower half shell (102), the front end of the needle body (3) is provided with a needle (31), and the inner cavity of the housing (1) is provided for the axial movement of the sliding sleeve (2) and The front end of the sliding sleeve (2) can protrude from the first guide limit groove (11) outside the housing (1), and the sliding sleeve (2) is provided with a second guide for the axial movement of the needle body (3). Guide limit groove (21), the needle body (3) is provided with an elastic buckle (32) for assembling against the rear wall of the sliding sleeve (2), and the housing (1) is provided with It is used to disengage the elastic buckle (32) on the needle body (3) from the rear wall of the sliding sleeve (2) when the front end of the sliding sleeve (2) retracts into the housing (1) And enter the tripping protrusion (12) in the sliding sleeve (2), between the needle body (3) and the bottom of the inner cavity of the housing (1) is connected a Move forward so that the needle (31) pierces the spring (4) outside the casing (1) from the front end of the sliding sleeve (2). 2. A front pressure blood collection needle device according to claim 1, characterized in that a block (33) is provided on the wall of the needle body (3), and a bottom of the inner cavity of the housing (1) is provided with A clamping slot (13), one end of the spring (4) is clamped outside the clamping block (33) and the other end is clamped in the clamping slot (13). 3. A front pressure blood collection needle device according to claim 1, characterized in that the tripping protrusion (12) is provided with a device for retracting into the housing at the front end of the sliding sleeve (2). (1) When it is inside, the elastic buckle (32) is easily detached from the rear wall of the sliding sleeve (2) and enters the sliding surface (121) in the sliding sleeve (2). 4. A front pressure blood collection needle device according to claim 3, characterized in that there are two elastic buckles (32), which are arranged in a circular array on the needle body (3), and the shell There are two tripping protrusions (12) in the body (1), and each tripping protrusion (12) is provided with a sliding surface (121). 5. A kind of front pressure blood collection needle device according to any one of claims 1-4, characterized in that the blood collection needle device also includes a needle cover (5), and the needle cover (5) is separated from the The front end of the sliding sleeve (2) penetrates and sleeves on the needle (31).