TWM477259U - Lancing device with vibration absorption mechanism - Google Patents

Description

Blood collection device with suspension structure

This creation is related to the human body surface blood sampling device, especially a blood collection device with a shock-absorbing structure, which can greatly reduce the vibration of the blood-sucking needle (Lancet) entering and exiting the human body surface skin, so that the user suffers Pain is minimized.

In patients with diabetes or chronic diseases, blood collection needles in a blood collection device are usually used to pierce the skin of the subject, so that the subject can collect and test a small amount of blood. The conventional blood collection device usually has a disposable body, a replaceable lancet and a detachable front cover for attaching the lancet, the lancet having a needle disposed on the moving mechanism inside the body, when moving to a fixed point The needle can protrude the front cover to pierce the skin of the subject to a certain depth and then return.

For the subject, the faster the blood collection process, the more the psychological burden and fear of the subject can be alleviated. Therefore, the conventional blood collection device uses the push rod of the firing unit in the body to quickly fire the blood collection needle. The lancet can move quickly to protrude the front cover of the body. However, in addition to the pain caused by the blood needle passing through the skin of the subject at a high speed, when the blood collection needle passes through the skin of the subject to the deepest point, the positioning needle of the blood collection needle and the body will collide. The maximum vibration causes the blood needle to be reversed and retracted instantaneously. It also causes the aspirated person to feel strong pain when the blood needle enters the deepest part of the skin, and also enlarges the wound that the pierced person is puncture. It is a big pain for the weak elderly.

In view of the above-mentioned shortcomings, the purpose of the present invention is to provide a blood collection device having a suspension structure, which can absorb the vibration generated by the blood collection needle in the process of entering and leaving the human skin and reversing the movement moment, thereby effectively reducing the vibration. The pain of the tester also avoids the expansion of the puncture wound of the subject.

To this end, the present invention provides a blood collection device having a body and a front cover disposed at a front end of the body, the front cover being sleeved from an outer casing and a hollow positioning member to movably receive a take-up The blood needle is inside the positioning member, and a suspension structure is disposed between the positioning member and the outer casing.

Therefore, when the blood collection device uses the blood collection needle for blood sampling operation, the kinetic energy of the blood collection needle is transmitted to the positioning member, and the suspension structure can provide moderate elasticity as a damper (Shock Absorber), using damping (Damping) The characteristic is to greatly slow down the movement of the blood collection needle and the vibration in the transient reverse process, so that the vibration of the blood collection needle is reduced to achieve a near-painful use effect.

The preferred design of the present invention is that the suspension structure is a hollow elastomer (Elastic Body) disposed on the outer periphery of the positioning member, and the material thereof may be rubber or thermoplastic material or other elastic material.

10‧‧‧ blood collection device

20‧‧‧ body

22‧‧‧ Body

23‧‧‧ Fixed seat

24‧‧‧Outer casing

241‧‧‧ needle outlet

26‧‧‧ Positioning parts

28‧‧‧Sliding channel

281‧‧‧stops

282‧‧‧ Small Trails Department

284‧‧‧ Tapered

286‧‧‧The Great Trails Department

30‧‧‧ blood needle

32‧‧‧ needle

34‧‧‧ needle seat

341‧‧‧ front end

40‧‧‧Shock structure

41, 42‧‧‧ rubber ring

Figure 1 is a side view of the first embodiment of the creation.

Fig. 2 is a partial cross-sectional view showing the first embodiment of the creation.

Fig. 3A is a partial cross-sectional view showing the first embodiment of the creation, in which the needle of the lancet protrudes from the body.

Fig. 3B is a partial enlarged view of Fig. 3A.

Figure 4 is a partial cross-sectional view showing the second embodiment of the creation.

Please refer to the figures 1 to 3A and 3B. The blood collection device 10 provided in the first embodiment of the present invention comprises a body 20, a blood collection needle 30 and a suspension structure 40. The direction is defined by the general human cognition, that is, the direction in which the blood collection needle 30 protrudes from the body 20 is forward.

The main body 20 is formed in a pen shape and has a body portion 22 which is detachably assembled to the front end of the body portion 22. Referring to FIG. 2, the front cover has a fixing seat 23, and an outer casing 24 is sleeved and fixed. The housing 23 and the positioning member 26 are coaxially disposed inside the outer casing 24. The front end of the outer casing 24 defines a needle opening 241. The positioning member 26 defines a sliding passage 28 communicating with the needle opening 241. The needle exit 241 is disposed coaxially with the slide passage 28. Specifically, the sliding passage 28 has a circular cross section, and a stopping portion 281, a small diameter portion 282, a tapered portion 284, and a large diameter portion 286 are sequentially disposed away from the needle exit opening 241. The diameter of the small diameter portion 282 is smaller than the large diameter portion 286, and the diameter of the blocking portion 281 is smaller than the small diameter portion 282.

The lancet 30 is a replacement part for the user, and has a needle 32 and a needle holder 34. The needle holder 34 is slidably received in the sliding passage 28 and is driven to move forward and backward by a firing unit built in the body. Since the specific structure of the firing unit is not the focus of this creation, it will not be described in detail here.

The suspension structure 40 is a hollow elastic body of a rubber or a thermoplastic material in the present embodiment, and surrounds the outer peripheral surface of the positioning member 26 to closely fit the positioning member 26 to the outer casing 24 . Internal, located inside the positioning member 26 The lancet 30 is also effectively positioned and provides a uniform and balanced shock absorbing effect as the lancet 30 moves. It is worth mentioning that the hollow elastic body can also be directly integrally molded on the positioning member by a manufacturing method such as injection molding.

When the user uses the blood collection device 10 of the present invention, referring to FIG. 2 and FIGS. 3A and 3B, the user operates the firing unit to drive the blood collection needle 30 to move toward the needle outlet 241, and the needle holder 345 of the blood collection needle 30. The front end portion 341 first passes through the large diameter portion 286 of the sliding passage 28, and is guided by the tapered portion 284 to enter the small diameter portion 282, and then the blood receiving needle 30 is along the axial direction of the small diameter portion 282. The needle 241 is further advanced toward the needle exit port 241. Finally, the front end portion 341 of the needle hub 34 is stopped against the stopper portion 281, and the needle 32 protrudes from the needle exit port 241, thereby piercing and reaching the deepest part of the skin of the subject. . During the movement of the lancet 30, the hub 32 will be guided by the sliding channel 28, so that some of the vibration and kinetic energy generated by the lancet 30 will be transmitted to the locating member 26 and finally absorbed by the suspension structure 40. . When the lancet 30 is advanced to bring its front end portion 341 into contact with the stopper portion 281, the positioning member 26 will prevent the lancet 30 from continuing to move forward to generate a large collision, which causes positioning due to the force and reaction force. The piece 26 and the lancet 30 generate a large amount of vibration energy, which is absorbed by the suspension structure 40, so that the vibration of the lancet 30 is greatly reduced, ensuring smooth movement of the lancet, thereby greatly reducing The pain experienced by the user is even close to the painless effect.

Please refer to FIG. 4 for the blood collection device 10 according to the second embodiment of the present invention. The structure of the blood collection device 10 is substantially the same as that of the previous embodiment. The main difference is that the suspension structure 40 is separately spaced from the two rubber rings 41 & 42. 26 The front and back sections of the outer peripheral surface can also provide good shock absorption.

It is to be noted that when the needle holder 32 of the blood collection needle 30 is moved to the small diameter portion 282 At this time, since the small diameter portion 282 has a cross-sectional dimension close to the needle holder 32, and the needle 32 of the blood collection needle 30 is also in contact with human skin at this time, vibration is particularly likely to occur. For those skilled in the art, the number of the aforementioned rubber rings can be easily reduced to one, and is disposed in the front portion of the outer peripheral surface of the positioning member 26, and the shock absorbing effect can also be exerted, and the needle 32 can smoothly protrude the outer casing 24. A needle port 241 reduces the shock of the impact while reducing the pain of the user.

By setting the suspension structure, the creation can absorb the mechanical energy generated by the rapid movement and collision of the blood collection needle, and greatly reduce the vibration generated by the blood collection needle inside the human body. Those skilled in the art can choose to avoid according to actual needs. The structure and material of the seismic structure are used to adjust the damping value. For example, the suspension structure is changed to a circular column of elastic columns to provide the same effect. Based on the above description, this creation can really eliminate the pain that the user is afraid of, and is conducive to the blood collection operation.

10‧‧‧ blood collection device

20‧‧‧ body

22‧‧‧ Body

24‧‧‧Outer casing

241‧‧‧ needle outlet

26‧‧‧ Positioning parts

28‧‧‧Sliding channel

281‧‧‧stops

282‧‧‧ Small Trails Department

284‧‧‧ Tapered

286‧‧‧The Great Trails Department

30‧‧‧ blood needle

32‧‧‧ needle

34‧‧‧ needle seat

341‧‧‧ front end

40‧‧‧Shock structure

Claims (9)

A blood collection device having a body and a front cover disposed at a front end of the body, the front cover being composed of an outer casing and a positioning member disposed inside the outer casing for slidably receiving a blood collection needle. The utility model is characterized in that: a further suspension structure is arranged between the positioning component and the outer casing body. The blood collection device of claim 1, wherein the suspension structure is disposed around an outer peripheral surface of the positioning member. The blood collection device of claim 2, wherein the suspension structure is a hollow elastomer. The blood collection device of claim 3, wherein the hollow elastomer is made of a material selected from the group consisting of rubber or thermoplastic soft materials. The blood collection device of claim 3, wherein the suspension structure is provided with at least one rubber ring disposed on an outer circumferential surface of the positioning member along a forward direction of the blood-catching needle. The blood collection device of claim 5, wherein the at least one rubber ring has two numbers, and is spaced apart from each other on the outer circumferential surface of the positioning member along the front and rear portions of the blood needle advancement direction. The blood collection device according to claim 3, wherein the hollow elastic body is coated on an outer peripheral surface of the positioning member. The blood collection device of claim 7, wherein the hollow elastomer is integrally formed with the positioning member. The blood collection device according to any one of claims 1 to 8, wherein the outer casing is coaxially disposed with the positioning member, the outer casing has a needle outlet, and the positioning member has a sliding passage and communicates with the needle. The sliding passage is provided with a small diameter portion, a tapered portion and a large diameter portion in a direction away from the needle opening.