Rubber sheath for blood lancet and disposable blood lancet

Abstract

This utility model relates to the field of medical device technology, and discloses a rubber sheath for blood collection needles and a disposable blood collection needle. The rubber sheath for blood collection needles includes a sheath body, the inner wall and / or outer wall of which are designed with a wavy surface. This results in several thin-walled and thick-walled areas forming on the sidewalls of the sheath body from one end to the other. The rebound force of the thin-walled areas is less than that of the thick-walled areas. When the tip of the sheath body is compressed, the thin-walled areas compress and deform before the thick-walled areas. The thick-walled areas provide the main rebound force when the tip of the sheath body returns to its original position. By designing the inner wall, outer wall, or both inner and outer walls as wavy, the sheath body exhibits uneven wall thickness, thereby improving the rebound effect. Furthermore, through the rational design of the rebound forces in the thick-walled and thin-walled areas, the accidental ejection of the vacuum blood collection tube during blood collection can be avoided, ensuring the safety and effectiveness of the blood collection process and improving the user experience of disposable blood collection needles.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a rubber sheath for blood collection needles and a disposable blood collection needle. Background Technology

[0002] Venous blood collection needles are essential consumables for collecting venous blood samples in hospital laboratories, and are used in conjunction with vacuum blood collection tubes. Venous blood collection needles are generally equipped with rubber sheaths to ensure a tight seal during multiple-tube blood collection and prevent accidental punctures to the operator. During blood sample collection, the vacuum blood collection tube is inserted into the puncture needle. At this time, the rubber sheath is compressed, allowing the needle tip to protrude, and it should not be able to be pushed out. When the vacuum blood collection tube is removed from the puncture needle, the rubber sheath should quickly rebound, sealing the needle tip. Therefore, the resilience of the rubber sheath is a crucial characteristic.

[0003] Currently, all rubber sheaths on the market are structured as long, thin, hollow cap-shaped bodies with one open end, such as... Figure 1 As shown, the tube body has a uniform thickness. However, in clinical use, it has been found that the rubber sheath often fails to spring back properly after the vacuum blood collection tube is removed, or the rubber sheath unexpectedly springs back during blood collection, pushing the vacuum blood collection tube out.

[0004] Failure to rebound properly may have the following adverse effects: 1) The rubber sheath may not be able to rebound completely, resulting in incomplete sealing of the puncture tip and blood leakage from the interface, posing a risk of blood contamination; 2) The exposed puncture tip and leaked blood may carry infectious pathogens, which may come into contact with other surfaces or instruments, increasing the risk of cross-infection for patients or medical staff; 3) In the case of multiple-tube blood collection, the blood collection process may be interrupted due to the rubber sheath not rebounding, requiring re-puncture, which increases patient pain and operation time; 4) When blood collection is interrupted, the blood collection needle needs to be replaced or the leaked blood problem needs to be handled manually, which delays the blood collection process and requires the use of additional blood collection needles, increasing the cost of consumables.

[0005] When a vacuum blood collection tube is accidentally pushed out, the blood collection process is abnormally interrupted, which may result in insufficient blood volume and the need to collect blood again, reducing operational efficiency.

[0006] Therefore, an unsuitable rebound force of the rubber sheath can directly affect the safety and effectiveness of blood collection, requiring technical improvements. Utility Model Content

[0007] Based on the above problems, the purpose of this utility model is to provide a rubber sheath for blood collection needles and a disposable blood collection needle, optimize the elasticity of the rubber sheath, improve the controllability of the elasticity, and avoid the situation where the rubber sheath does not rebound or pushes out the vacuum blood collection tube when collecting blood samples.

[0008] To achieve the above objectives, firstly, the present invention adopts the following technical solution:

[0009] A rubber sheath for blood collection needles includes a sheath body, the inner wall and / or outer wall of the sheath body being configured with a corrugated surface, such that the sidewall of the sheath body forms several thin-walled and thick-walled regions from the head end to the tail end. The rebound force of the thin-walled regions is less than that of the thick-walled regions. When the head end of the sheath body is compressed, the thin-walled regions are compressed and deformed before the thick-walled regions. The thick-walled regions are used to provide the main rebound force when the head end of the sheath body is reset.

[0010] As an alternative, both the inner and outer walls of the rubber sleeve body are wavy surfaces, with the troughs of the wavy pattern on the inner wall opposite to the troughs of the wavy pattern on the outer wall, and the crests of the wavy pattern on the inner wall opposite to the crests of the wavy pattern on the outer wall.

[0011] As an alternative, the rubber sleeve body is divided into several sequentially connected segments from the head end to the tail end, and the wave-shaped wavelength of each segment is set independently.

[0012] As an alternative, the wavelength of the wave-shaped segments decreases sequentially from the head to the tail of the rubber sleeve body.

[0013] As an alternative, the rubber sleeve body is shaped like a tapered tube with a small head and a large tail. The inner hole of the rubber sleeve body is a straight hole or a tapered hole with a taper smaller than that of the tapered tube, so that the wall thickness at the tail end of the rubber sleeve body is greater than that at the head end.

[0014] As an optional solution, the outer wall taper of the rubber sleeve body is 1° to 5°, and the inner wall taper of the rubber sleeve body is less than 1°.

[0015] Secondly, the present invention adopts the following technical solution:

[0016] A disposable blood collection needle includes a needle hub, a needle tube, a needle protective sleeve, and a rubber sheath for the blood collection needle. The needle tube is disposed on the needle hub, the rubber sleeve body of the blood collection needle is fitted onto the needle tube, and the tail end of the rubber sleeve body is fixed to the needle hub. The needle protective sleeve is fitted onto the rubber sleeve body.

[0017] As an alternative, the tip of the puncture needle is provided with a hook to prevent debris from being generated when the puncture needle punctures the rubber sleeve body or the blood collection tube sealing plug.

[0018] As an alternative, the disposable blood collection needle also includes a tubing, a blood collection needle tube, and a blood collection needle protective sleeve. One end of the tubing is provided with a butterfly wing, the blood collection needle tube is placed on the butterfly wing, the blood collection needle protective sleeve is placed on the blood collection needle tube, and the other end of the tubing is provided with a connector, which is connected to the puncture needle seat.

[0019] As an optional solution, UV adhesive is applied between the puncture needle and the puncture needle hub, and between the blood collection needle and the butterfly wing.

[0020] The beneficial effects of this utility model are:

[0021] This blood collection needle uses an optimized rubber sheath compared to conventional, uniformly thick rubber sheaths. By designing the inner wall, outer wall, or both inner and outer walls as wavy, the wall thickness of the sheath body is uneven. When the blood collection tube is compressed along the axis from the tip of the sheath body, the thin-walled area is compressed and deformed first, causing the needle tip of the puncture needle to protrude and extend into the blood collection tube. When the blood collection tube is withdrawn, the sheath body returns to its original shape, and the thick-walled area has stronger rebound force, thereby improving the rebound effect. This allows the sheath body to cover the needle tip of the puncture needle more quickly and effectively, preventing blood leakage. Furthermore, by controlling the rebound force of the thick-walled and thin-walled areas to a reasonable value, the accidental ejection of the vacuum blood collection tube during blood collection can be avoided, ensuring the safety and effectiveness of the blood collection process and greatly improving the user experience of disposable blood collection needles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the existing rubber sheath structure;

[0023] Figure 2 This is a structural cross-sectional view of the rubber sheath for blood collection needles provided in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the puncture end of a disposable blood collection needle provided in Embodiment 1 of this utility model;

[0025] Figure 4 This is an exploded view of the puncture end of the disposable blood collection needle provided in Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of the tip of the puncture needle tube in the disposable blood collection needle provided in Embodiment 1 of this utility model;

[0027] Figure 6 This is a schematic diagram of the overall structure of the disposable blood collection needle provided in Embodiment 1 of this utility model;

[0028] Figure 7 This is a structural cross-sectional view of the rubber sheath for blood collection needles provided in Embodiment 2 of this utility model;

[0029] Figure 8 This is a schematic diagram of the puncture end of the disposable blood collection needle provided in Embodiment 2 of this utility model;

[0030] Figure 9 This is a structural cross-sectional view of the rubber sheath for blood collection needles provided in Embodiment 3 of this utility model;

[0031] Figure 10 This is a schematic diagram of the puncture end of the disposable blood collection needle provided in Embodiment 3 of this utility model;

[0032] Figure 11 This is a cross-sectional view of the structure of the rubber sheath for blood collection needles with an outer wall taper of 3° provided in Embodiment 4 of this utility model;

[0033] Figure 12 This is a structural cross-sectional view of the rubber sheath for blood collection needles with an outer wall taper of 5° provided in Embodiment 4 of this utility model;

[0034] Figure 13 This is a structural cross-sectional view of the rubber sheath for blood collection needles with an outer wall taper of 3° provided in Embodiment 5 of this utility model;

[0035] Figure 14 This is a cross-sectional view of the structure of the rubber sheath for blood collection needles with an outer wall taper of 5° provided in Embodiment 5 of this utility model;

[0036] Figure 15 This is a cross-sectional view of the structure of the rubber sheath for blood collection needles with an outer wall taper of 3° provided in Embodiment Six of this utility model;

[0037] Figure 16 This is a cross-sectional view of the structure of the rubber sheath for blood collection needles with an outer wall taper of 5° provided in Embodiment Six of this utility model.

[0038] In the attached image:

[0039] 1. Rubber sleeve body; 11. Thin-walled area; 12. Thick-walled area; 2. Puncture needle seat; 3. Puncture needle tube; 31. Hook part; 4. Puncture needle protective sleeve; 5. Tube; 6. Blood collection needle tube; 7. Blood collection needle protective sleeve; 8. Butterfly wing; 9. Connector; 10. UV glue. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0045] Example 1:

[0046] Please see Figure 2 As shown, this embodiment provides a rubber sheath for blood collection needles, including a sheath body 1. The inner and outer walls of the sheath body 1 are set with a wavy surface, so that the sidewall of the sheath body 1 forms a plurality of thin-walled regions 11 and thick-walled regions 12 from the head end to the tail end. The elastic force of the thin-walled region 11 is less than that of the thick-walled region 12. When the head end of the sheath body 1 is pressed, the thin-walled region 11 is compressed and deformed before the thick-walled region 12. The thick-walled region 12 provides the main elastic force when the head end of the sheath body 1 is reset.

[0047] Furthermore, the troughs of the wave pattern on the inner wall are opposite to the troughs of the wave pattern on the outer wall, and the crests of the wave pattern on the inner wall are opposite to the crests of the wave pattern on the outer wall. Thus, when the head end of the rubber sleeve body 1 is compressed, the rubber sleeve body 1 will first compress and deform in the thin-walled area 11, thereby producing regular deformation and helping the rubber sleeve body 1 to rebound.

[0048] In this embodiment, the outer wall taper and inner wall taper of the rubber sleeve body 1 are both 1°.

[0049] In addition, the wavelength, wave height, and number of peaks and troughs of the wave shape can be adaptively adjusted, thereby changing the magnitude of the rebound force within a certain range, so as to obtain various suitable rebound forces for the rubber sheath of the blood collection needle according to the needs.

[0050] Based on this, this embodiment also provides a disposable blood collection needle, such as... Figure 3 and Figure 4 As shown, the disposable blood collection needle includes a puncture needle seat 2, a puncture needle tube 3, a puncture needle protective sleeve 4, and the aforementioned rubber sheath for the blood collection needle. The puncture needle tube 3 is disposed on the puncture needle seat 2. The rubber sleeve body 1 of the blood collection needle is sleeved on the puncture needle tube 3, and the tail end of the rubber sleeve body 1 is fixed to the puncture needle seat 2. The puncture needle protective sleeve 4 is sleeved on the rubber sleeve body 1.

[0051] During blood sample collection, the protective sheath 4 of the puncture needle is removed, and the rubber sheath body 1 is inserted into the blood collection tube. The rubber sheath body 1 is gradually compressed, exposing the puncture needle tube 3. The puncture needle tube 3 is inserted into the sealing plug of the blood collection tube. When the blood collection tube is pulled off the puncture needle tube 3, the rubber sheath body 1 quickly rebounds, covering the needle tip of the puncture needle tube 3 to prevent blood leakage and reduce the risk of infection. It is convenient to use.

[0052] Specifically, the tip of the puncture needle 3 is provided with a hook portion 31, see details. Figure 5 The hook portion 31 is used to prevent debris from being generated when the puncture needle 3 punctures the rubber sleeve body 1 or the blood collection tube sealing plug, so as to prevent the generated debris from falling into the blood collection tube, contaminating the blood sample, and affecting the test results.

[0053] Figure 6 The diagram shows the complete structure of a disposable blood collection needle. The disposable blood collection needle also includes a tubing 5, a blood collection needle tube 6, and a blood collection needle protective sleeve 7. One end of the tubing 5 is provided with a butterfly wing 8, the blood collection needle tube 6 is placed on the butterfly wing 8, and the blood collection needle protective sleeve 7 is placed on the blood collection needle tube 6. The other end of the tubing 5 is provided with a connecting seat 9, which is connected to the puncture needle seat 2.

[0054] Furthermore, UV glue 10 is provided between the puncture needle tube 3 and the puncture needle seat 2, and between the blood collection needle tube 6 and the butterfly wing 8, to ensure the connection is sealed.

[0055] Therefore, the rubber sheath of this blood collection needle is an optimization of the conventional uniform wall thickness rubber sheath. By designing the inner and outer walls as wavy, the wall thickness of the sheath body 1 is uneven. When the blood collection tube applies force along the axis to compress the sheath body 1 from the head end, the thin-walled area 11 is compressed and deformed first, and then the needle tip of the puncture needle tube 3 is exposed and inserted into the blood collection tube. When the blood collection tube is withdrawn, the sheath body 1 returns to its original shape, and the thick-walled area 12 has a stronger rebound force, thereby improving the rebound effect. This allows the sheath body 1 to cover the needle tip of the puncture needle tube 3 more quickly and effectively, preventing blood leakage. Furthermore, by controlling the rebound force of the thick-walled area 12 and the thin-walled area 11 to a reasonable value, the accidental ejection of the vacuum blood collection tube during the blood collection process can be avoided, ensuring the safety and effectiveness of the blood collection process and greatly improving the user experience of disposable blood collection needles.

[0056] Example 2:

[0057] Please see Figure 7 As shown, this embodiment provides a rubber sheath for blood collection needles, including a sheath body 1. The inner wall of the sheath body 1 is configured with a wavy surface, such that the side wall of the sheath body 1 forms a plurality of thin-walled regions 11 and thick-walled regions 12 from the head end to the tail end. The rebound force of the thin-walled region 11 is less than that of the thick-walled region 12. When the head end of the sheath body 1 is pressed, the thin-walled region 11 is compressed and deformed before the thick-walled region 12. The thick-walled region 12 provides the main rebound force when the head end of the sheath body 1 is reset.

[0058] The difference from Embodiment 1 is that in this embodiment, only the inner wall of the rubber sleeve body 1 is formed into a wavy shape, while the outer wall of the rubber sleeve body 1 is smooth. It can also form a thin-walled region 11 and a thick-walled region 12, achieving a design with uneven wall thickness. When the head end of the rubber sleeve body 1 is pressed, the rubber sleeve body 1 will first compress and deform in the thin-walled region 11, thus producing regular deformation and aiding in the rebound of the rubber sleeve body 1.

[0059] Similarly, based on this, this embodiment also provides a disposable blood collection needle, such as... Figure 8 As shown, the disposable blood collection needle includes a puncture needle seat 2, a puncture needle tube 3, a puncture needle protective sleeve 4, and the aforementioned rubber sheath for the blood collection needle. The puncture needle tube 3 is disposed on the puncture needle seat 2. The rubber sleeve body 1 of the blood collection needle is sleeved on the puncture needle tube 3, and the tail end of the rubber sleeve body 1 is fixed to the puncture needle seat 2. The puncture needle protective sleeve 4 is sleeved on the rubber sleeve body 1.

[0060] During blood sample collection, the protective sheath 4 of the puncture needle is removed, and the rubber sheath body 1 is inserted into the blood collection tube. The rubber sheath body 1 is gradually compressed, exposing the puncture needle tube 3. The puncture needle tube 3 is inserted into the sealing plug of the blood collection tube. When the blood collection tube is pulled off the puncture needle tube 3, the rubber sheath body 1 quickly rebounds, covering the needle tip of the puncture needle tube 3 to prevent blood leakage and reduce the risk of infection. It is convenient to use.

[0061] Therefore, the rubber sheath of this blood collection needle is an optimization of the conventional uniform wall thickness rubber sheath. By designing the inner wall as a wave shape, the wall thickness of the sheath body 1 is uneven. When the blood collection tube applies force along the axis to compress the sheath body 1 from the head end, the thin-walled area 11 is compressed and deformed first, and then the needle tip of the puncture needle tube 3 is exposed and inserted into the blood collection tube. When the blood collection tube is withdrawn, the sheath body 1 returns to its original shape, and the thick-walled area 12 has a stronger rebound force, thereby improving the rebound effect. This allows the sheath body 1 to cover the needle tip of the puncture needle tube 3 more quickly and effectively, preventing blood leakage. Furthermore, by controlling the rebound force of the thick-walled area 12 and the thin-walled area 11 to a reasonable value, the situation of the vacuum blood collection tube being accidentally pushed out during the blood collection process can be avoided, ensuring the safety and effectiveness of the blood collection process and greatly improving the user experience of disposable blood collection needles.

[0062] Example 3:

[0063] Please see Figure 9 As shown, this embodiment provides a rubber sheath for blood collection needles, including a sheath body 1. The outer wall of the sheath body 1 is configured with a wavy surface, such that the side wall of the sheath body 1 forms a plurality of thin-walled regions 11 and thick-walled regions 12 from the head end to the tail end. The rebound force of the thin-walled region 11 is less than that of the thick-walled region 12. When the head end of the sheath body 1 is compressed, the thin-walled region 11 is compressed and deformed before the thick-walled region 12. The thick-walled region 12 provides the main rebound force when the head end of the sheath body 1 is reset.

[0064] The difference from Embodiments 1 and 2 is that in this embodiment, the outer wall of the rubber sleeve body 1 is formed into a wave shape, while the inner wall of the rubber sleeve body 1 is smooth. This also allows for the formation of thin-walled areas 11 and thick-walled areas 12, achieving a design with uneven wall thickness. When the head end of the rubber sleeve body 1 is compressed, the rubber sleeve body 1 will first compress and deform in the thin-walled area 11, thus producing regular deformation and aiding in the rebound of the rubber sleeve body 1.

[0065] Similarly, based on this, this embodiment also provides a disposable blood collection needle, such as... Figure 10 As shown, the disposable blood collection needle includes a puncture needle seat 2, a puncture needle tube 3, a puncture needle protective sleeve 4, and the aforementioned rubber sheath for the blood collection needle. The puncture needle tube 3 is disposed on the puncture needle seat 2. The rubber sleeve body 1 of the blood collection needle is sleeved on the puncture needle tube 3, and the tail end of the rubber sleeve body 1 is fixed to the puncture needle seat 2. The puncture needle protective sleeve 4 is sleeved on the rubber sleeve body 1.

[0066] During blood sample collection, the protective sheath 4 of the puncture needle is removed, and the rubber sheath body 1 is inserted into the blood collection tube. The rubber sheath body 1 is gradually compressed, exposing the puncture needle tube 3. The puncture needle tube 3 is inserted into the sealing plug of the blood collection tube. When the blood collection tube is pulled off the puncture needle tube 3, the rubber sheath body 1 quickly rebounds, covering the needle tip of the puncture needle tube 3 to prevent blood leakage and reduce the risk of infection. It is convenient to use.

[0067] Therefore, the rubber sheath of this blood collection needle is an optimization of the conventional uniform wall thickness rubber sheath. By designing the outer wall as a wave shape, the wall thickness of the sheath body 1 is uneven. When the blood collection tube applies force along the axis to compress the sheath body 1 from the head end, the thin-walled area 11 is compressed and deformed first, and then the needle tip of the puncture needle tube 3 is exposed and inserted into the blood collection tube. When the blood collection tube is withdrawn, the sheath body 1 returns to its original shape, and the thick-walled area 12 has a stronger rebound force, thereby improving the rebound effect. This allows the sheath body 1 to cover the needle tip of the puncture needle tube 3 more quickly and effectively, preventing blood leakage. Furthermore, by controlling the rebound force of the thick-walled area 12 and the thin-walled area 11 to a reasonable value, the situation of the vacuum blood collection tube being accidentally pushed out during the blood collection process can be avoided, ensuring the safety and effectiveness of the blood collection process and greatly improving the user experience of disposable blood collection needles.

[0068] Example 4:

[0069] This embodiment provides a rubber sheath for blood collection needles, including a sheath body 1. The inner and outer walls of the sheath body 1 are set with a wavy surface, so that the side wall of the sheath body 1 forms a plurality of thin-walled regions 11 and thick-walled regions 12 from the head end to the tail end. The elastic force of the thin-walled region 11 is less than that of the thick-walled region 12. When the head end of the sheath body 1 is pressed, the thin-walled region 11 is compressed and deformed before the thick-walled region 12. The thick-walled region 12 provides the main elastic force when the head end of the sheath body 1 is reset.

[0070] Based on Embodiment 1, in this embodiment, the outer shape of the rubber sleeve body 1 is a tapered tube with a small head and a large tail. The inner hole of the rubber sleeve body 1 is a straight hole or a tapered hole with a taper smaller than that of the tapered tube, so that the wall thickness at the tail end of the rubber sleeve body 1 is greater than the wall thickness at the head end.

[0071] Optionally, the outer wall taper of the rubber sleeve body 1 is 1° to 5°, and the inner wall taper of the rubber sleeve body 1 is less than 1°.

[0072] Therefore, the wall thickness of the tail end of the rubber sleeve body 1 can be gradually increased. When it returns to its original position, the elasticity of the rubber sleeve body 1 is enhanced, which can more effectively cover the needle tip of the puncture needle tube 3 and prevent blood leakage.

[0073] In this embodiment, the outer wall taper of the rubber sleeve body 1 is 3° (e.g., Figure 11 (as shown) and 5° (as shown) Figure 12 (See example).

[0074] Example 5:

[0075] This embodiment provides a rubber sheath for blood collection needles, including a sheath body 1. The inner wall of the sheath body 1 is configured with a wavy surface, such that the side wall of the sheath body 1 forms a plurality of thin-walled regions 11 and thick-walled regions 12 from the head end to the tail end. The elastic force of the thin-walled region 11 is less than that of the thick-walled region 12. When the head end of the sheath body 1 is compressed, the thin-walled region 11 is compressed and deformed before the thick-walled region 12. The thick-walled region 12 provides the main elastic force when the head end of the sheath body 1 is reset.

[0076] Based on Embodiment 2, in this embodiment, the outer shape of the rubber sleeve body 1 is a tapered tube with a small head and a large tail. The inner hole of the rubber sleeve body 1 is a straight hole or a tapered hole with a taper smaller than that of the tapered tube, so that the wall thickness at the tail end of the rubber sleeve body 1 is greater than the wall thickness at the head end.

[0077] Optionally, the outer wall taper of the rubber sleeve body 1 is 1° to 5°, and the inner wall taper of the rubber sleeve body 1 is less than 1°.

[0078] Therefore, the wall thickness of the tail end of the rubber sleeve body 1 can be gradually increased. When it returns to its original position, the elasticity of the rubber sleeve body 1 is enhanced, which can more effectively cover the needle tip of the puncture needle tube 3 and prevent blood leakage.

[0079] In this embodiment, the outer wall taper of the rubber sleeve body 1 is 3° (e.g., Figure 13 (as shown) and 5° (as shown) Figure 14 (See example).

[0080] Example 6:

[0081] This embodiment provides a rubber sheath for blood collection needles, including a sheath body 1. The outer wall of the sheath body 1 is configured with a wavy surface, such that the side wall of the sheath body 1 forms a plurality of thin-walled regions 11 and thick-walled regions 12 from the head end to the tail end. The rebound force of the thin-walled region 11 is less than that of the thick-walled region 12. When the head end of the sheath body 1 is compressed, the thin-walled region 11 is compressed and deformed before the thick-walled region 12. The thick-walled region 12 provides the main rebound force when the head end of the sheath body 1 is reset.

[0082] Based on Embodiment 3, in this embodiment, the outer shape of the rubber sleeve body 1 is a tapered tube with a small head and a large tail. The inner hole of the rubber sleeve body 1 is a straight hole or a tapered hole with a taper smaller than that of the tapered tube, so that the wall thickness at the tail end of the rubber sleeve body 1 is greater than the wall thickness at the head end.

[0083] Optionally, the outer wall taper of the rubber sleeve body 1 is 1° to 5°, and the inner wall taper of the rubber sleeve body 1 is less than 1°.

[0084] Therefore, the wall thickness of the tail end of the rubber sleeve body 1 can be gradually increased. When it returns to its original position, the elasticity of the rubber sleeve body 1 is enhanced, which can more effectively cover the needle tip of the puncture needle tube 3 and prevent blood leakage.

[0085] In this embodiment, the outer wall taper of the rubber sleeve body 1 is 3° (e.g., Figure 15 (as shown) and 5° (as shown) Figure 16 (See example).

[0086] Example 7:

[0087] Based on Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, Embodiment 5 or Embodiment 6, this embodiment provides a rubber sheath for blood collection needles. The special feature is that the rubber sheath body 1 forms several sequentially connected segments from the head end to the tail end, and the wave-shaped wavelength of each segment is independently set.

[0088] For example, the front, middle and rear sections of the rubber sleeve body 1 can be designed separately, so that different sections of the rubber sleeve body 1 have different wave shapes, so as to change the rebound force of different sections within a certain range, thereby obtaining rubber sleeves with various suitable rebound forces according to needs.

[0089] Furthermore, the wave-shaped wavelength of each segment decreases sequentially from the head end to the tail end of the rubber sleeve body 1. That is, the segment near the head end of the rubber sleeve body 1 has a smaller rebound force and is easier to compress and deform; the segment near the tail end of the rubber sleeve body 1 has a larger rebound force and can better promote rebound.

[0090] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rubber sheath for blood collection needles, comprising a sheath body (1), characterized in that, The inner and / or outer walls of the rubber sleeve body (1) are configured with a wavy surface, such that the sidewalls of the rubber sleeve body (1) form a number of thin-walled areas (11) and thick-walled areas (12) from the head end to the tail end. The rebound force of the thin-walled area (11) is less than that of the thick-walled area (12). When the head end of the rubber sleeve body (1) is pressed, the thin-walled area (11) is compressed and deformed before the thick-walled area (12). The thick-walled area (12) is used to provide the main rebound force when the head end of the rubber sleeve body (1) is reset.

2. The rubber sheath for blood collection needles according to claim 1, characterized in that, The inner and outer walls of the rubber sleeve body (1) are both wavy surfaces, and the troughs of the wavy shape on the inner wall are opposite to the troughs of the wavy shape on the outer wall, and the crests of the wavy shape on the inner wall are opposite to the crests of the wavy shape on the outer wall.

3. The rubber sheath for blood collection needles according to claim 1, characterized in that, The rubber sleeve body (1) is formed into several segments connected in sequence from the head end to the tail end, and the wavelength of the wave shape of each segment is set independently.

4. The rubber sheath for blood collection needles according to claim 3, characterized in that, The wavelength of each segment decreases sequentially from the head end to the tail end of the rubber sleeve body (1).

5. The rubber sheath for blood collection needles according to claim 1, characterized in that, The outer shape of the rubber sleeve body (1) is a tapered tube with a small head and a large tail. The inner hole of the rubber sleeve body (1) is a straight hole or a tapered hole with a smaller taper than the tapered tube shape, so that the wall thickness at the tail end of the rubber sleeve body (1) is greater than the wall thickness at the head end.

6. The rubber sheath for blood collection needles according to claim 5, characterized in that, The outer wall taper of the rubber sleeve body (1) is 1° to 5°, and the inner wall taper of the rubber sleeve body (1) is less than 1°.

7. A disposable blood collection needle, characterized in that, The device includes a puncture needle seat (2), a puncture needle tube (3), a puncture needle protective sleeve (4), and a rubber sheath for blood collection needles as described in any one of claims 1-6. The puncture needle tube (3) is disposed on the puncture needle seat (2), the rubber sleeve body (1) of the rubber sheath for blood collection needles is sleeved on the puncture needle tube (3), and the tail end of the rubber sleeve body (1) is fixed to the puncture needle seat (2). The puncture needle protective sleeve (4) is sleeved on the rubber sleeve body (1).

8. The disposable blood collection needle according to claim 7, characterized in that, The tip of the puncture needle (3) is provided with a hook (31), which is used to prevent the puncture needle (3) from generating debris when it punctures the rubber sleeve body (1) or the blood collection tube sealing plug.

9. The disposable blood collection needle according to claim 7, characterized in that, It also includes a tubing (5), a blood collection needle tube (6), and a blood collection needle protective sleeve (7). One end of the tubing (5) is provided with a butterfly wing (8), the blood collection needle tube (6) is disposed on the butterfly wing (8), the blood collection needle protective sleeve (7) is sleeved on the blood collection needle tube (6), and the other end of the tubing (5) is provided with a connecting seat (9), the connecting seat (9) is connected to the puncture needle seat (2).

10. The disposable blood collection needle according to claim 9, characterized in that, UV glue (10) is provided between the puncture needle tube (3) and the puncture needle seat (2), and between the blood collection needle tube (6) and the butterfly wing (8).

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