Automatic retraction safety blood collection needle

Abstract

The present invention relates to an automatic retractable safety blood collection needle, which comprises a needle core, a trigger part, a sleeve and an adjusting part; the needle core comprises a needle head and a needle seat which are plugged into each other, and the needle seat is provided with a first boss and a second boss; the trigger part comprises a compression spring and a pair of limit plates, before the adjusting part is touched, the pair of limit plates clamp the second boss, the limit block is used to abut and limit the first boss, the compression spring is in a compressed state and abuts between the second boss and the limit block; after the adjusting part is touched, the free end of the limit plate rotates around one end fixed to the sleeve, the first boss and the second boss are released from the limit, the compression spring is in a reset state and pulls the needle head into the cavity of the sleeve. The present invention can recycle the needle head in time to avoid scratching the operator, and its touching direction conforms to the operator's usage habits, which is convenient for learning and promotion; the touching stroke is short, which can improve the collection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an automatic retractable safety blood collection needle. Background Art

[0002] The blood collection needle is a commonly used instrument in the medical field. It uses a needle to pierce the skin to collect blood samples. When collecting blood, the wound of the person being collected is close to the operator's fingers or gloves. Therefore, after the collection is completed, the exposed needle can easily scratch the operator, posing a certain safety hazard. At the same time, in order to avoid cross infection or other medical contamination caused by the used blood collection needle during collection, transportation and processing, when using the blood collection needle, a protective cap is often installed at the needle tip, or a pull-back device is provided to retract the needle tip into the syringe. The design of adding a protective cap makes the blood collection needle a split structure. The protective cap needs to be assembled separately and is easy to lose. When manually pulling back the needle, the pull-back stroke is long, which is not conducive to use and promotion. At the same time, the installation of the protective cap or pulling back the needle requires manual operation by the operator. When the number of blood samples is large and the collection task is heavy, it is very easy to make the operator tired, thereby reducing the collection efficiency. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the technical difficulty in the prior art that the needle of a blood collection needle needs to be manually pulled back after use, which easily causes fatigue to the operator and reduces the collection efficiency. An automatic retractable safety blood collection needle is provided, which automatically pulls back the needle after use to improve the collection efficiency.

[0004] In order to solve the above technical problems, the present invention provides an automatic retractable safety blood collection needle, which comprises:

[0005] The needle core comprises a needle head and a needle seat which are plugged into each other, wherein the outer periphery of the needle seat is provided with a first boss and a second boss, and the first boss is provided close to the needle head;

[0006] A trigger part, comprising a compression spring and a limit assembly; one end of the compression spring abuts against the second boss, and the first boss can be accommodated inside the compression spring; the limit assembly comprises limit plates symmetrically arranged on both sides of the needle seat, and the limit plates are both provided with raised limit blocks facing the needle seat;

[0007] A sleeve, wherein the sleeve has an axial cavity inside, and the needle core is inserted into the cavity; one end of the limit plate is fixed to the inner wall of the sleeve, and a gap is formed between the free end of the limit plate and the inner wall of the sleeve;

[0008] An adjusting portion, the adjusting portion being disposed on the wall of the sleeve and configured to enable the free end of the limiting plate to move toward the inner wall of the sleeve when triggered;

[0009] Before the adjusting part is touched, a pair of limit plates clamp the second boss, the limit block is used to abut and limit the first boss, and the compression spring is in a compressed state and abuts between the second boss and the limit block; after the adjusting part is touched, the free end of the limit plate rotates around one end fixed to the sleeve, the first boss and the second boss are released from the limit, the compression spring is in a reset state and pulls the needle into the cavity of the sleeve.

[0010] In one embodiment of the present invention, the adjustment part includes an adjustment handle and a pair of guide pillars, the adjustment handle is located outside the sleeve and connected to one end of the guide pillar, the other end of the guide pillar passes through the wall of the sleeve and extends into the cavity inside the sleeve, and the pair of guide pillars are respectively located on both sides of the needle core.

[0011] In one embodiment of the present invention, a waist-shaped hole is provided on the wall of the sleeve at a position corresponding to the adjusting portion, and the length direction of the waist-shaped hole is parallel to the axial direction of the sleeve; after the adjusting handle is touched, the guide column moves along the waist-shaped hole.

[0012] In one embodiment of the present invention, a side surface opposite to the limit plate includes an abutment surface, which is used to connect the free end of the limit plate and the limit block; when the adjustment handle is touched, the guide column moves close to the abutment surface, so that the limit plate rotates around its fixed end toward the inner wall of the sleeve.

[0013] In one embodiment of the present invention, the abutment surface is configured as a plane inclined from the wall of the sleeve toward the needle core.

[0014] In one embodiment of the present invention, the surface of the adjustment handle is provided with convex patterns.

[0015] In one embodiment of the present invention, a fixing block is provided at one end of the limiting plate fixed to the inner wall of the sleeve, and the inner wall of the sleeve is provided with a plug-in groove matched with the fixing block.

[0016] In one embodiment of the present invention, a connecting tube is further included. The interior of the needle core is hollow. The connecting tube is connected to the needle seat and communicates with the interior of the needle core.

[0017] In one embodiment of the present invention, it further comprises a protective tube, wherein the protective tube is sleeved on an end of the needle extending out of the sleeve.

[0018] In one embodiment of the present invention, a reinforcing rib is further provided at a position on the surface of the limiting plate corresponding to the limiting block.

[0019] The above technical solution of the present invention has the following advantages compared with the prior art:

[0020] The automatic retractable safety blood collection needle of the present invention can make the compression spring drive the needle core by touching the adjustment part, and automatically retract the needle into the inner cavity of the sleeve; after the blood sample is collected, the needle can be recovered in time to avoid the exposed needle from scratching the operator or causing great psychological pressure to the person being collected, and at the same time avoid medical pollution, which is convenient for the collection and transportation of blood collection needles;

[0021] The automatic retraction safety blood collection needle described in the present invention has the same triggering direction as the existing manual retraction type blood collection needle, which conforms to the usage habits of operators and is easy to learn and promote; the triggering stroke of the present invention is short, which can improve the collection efficiency; the pulling of the compression spring realizes the soft landing of the needle, and the recoil force in the horizontal direction is small, which reduces the impact on the operator and avoids the operator's hand fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 It is a schematic diagram of the structure of the automatic retractable safety blood collection needle in the preferred embodiment of the present invention;

[0024] Figure 2 yes Figure 1 The internal structure diagram of the automatic retractable safety blood collection needle is shown;

[0025] Figure 3 yes Figure 1 Another schematic diagram of the internal structure of the automatic retractable safety blood collection needle shown;

[0026] Figure 4 is a cross-sectional view of the automatic retractable safety blood collection needle in a preferred embodiment of the present invention;

[0027] Figure 5 Detailed Description of the Invention It is an exploded view of a sleeve in a preferred embodiment of the present invention.

[0028] Explanation of the reference numerals in the accompanying drawings in the specification: 1. needle core; 11. needle head; 12. needle seat; 13. first boss; 14. second boss; 2. trigger part; 3. compression spring; 4. limit plate; 41. limit block; 42. abutment surface; 43. fixing block; 44. reinforcing rib; 5. sleeve; 51. waist-shaped hole; 52. plug-in slot; 6. adjustment part; 61. adjustment handle; 62. guide column; 7. connecting tube; 8. protective tube; 9. butterfly handle. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0030] Example

[0031] Reference Figure 1 to Figure 5 As shown, the present invention provides an automatic retraction safety blood collection needle, which includes a needle core 1, a trigger part 2, a sleeve 5 and an adjustment part 6; the needle core 1 includes a needle 11 and a needle seat 12 that are plugged into each other. After the needle 11 completes blood sample collection, the adjustment part 6 is triggered to trigger the trigger part 2 and pull the needle 11 back into the sleeve 5. On the one hand, it protects the operator and prevents the exposed needle 11 from scratching the operator, facilitates the collection and transportation of medical devices, and reduces the probability of cross infection; on the other hand, the needle 11 is retracted in time after use to reduce the psychological pressure of the person being collected. The inventors of this case have found through research that the existing manual retraction type blood collection needle requires the operator to manually pull back the needle, and the retraction stroke is long, which can easily cause fatigue to the operator's hand muscles and joints. At the same time, a large number of blood sample collection tasks also make the operator form the habit of pulling back after blood collection. Based on this, the present invention provides an automatic retraction safety blood collection needle, and the operation direction of pulling back the needle conforms to the existing habits of the operator, which is convenient for training, learning and promotion. At the same time, the retraction stroke of the blood collection needle in the present invention is short, and the needle 11 is automatically retracted by the needle seat 12 driven by the trigger part 2, which is not easy to cause fatigue.

[0032] Specifically, refer to Figure 2 to Figure 5 As shown, the sleeve 5 has an axial cavity inside, and the needle core 1 is inserted into the cavity; when the blood collection needle is not in use, the needle 11 extends out of one end of the sleeve 5, and the automatic retraction safety blood collection needle also includes a protective tube 8, which is sleeved on the end of the needle 11 extending out of the sleeve 5 to keep the needle 11 clean when not in use and prevent the needle 11 from scratching the operator during transportation. After the blood collection needle is used, the needle 11 is recovered into the sleeve 5, and the protective tube 8 can be placed and recovered separately, which is easier to operate.

[0033] Specifically, refer to Figure 2 As shown, the trigger part 2 is located in the sleeve 5, and includes a compression spring 3 and a limit assembly; the limit assembly includes limit plates 4 symmetrically arranged on both sides of the needle seat 12, and the end of the limit plate 4 away from the needle 11 is fixed to the inner wall of the sleeve 5, and the end of the limit plate 4 close to the needle 11 is set as a free end, which has a certain gap with the inner wall of the sleeve 5, the free ends of the pair of limit plates 4 are both inclined toward the direction of the needle core 1, and the free ends of the pair of limit plates 4 are both symmetrically provided with raised limit blocks 41 toward the needle seat 12.

[0034] Further, see Figure 2 and Figure 3As shown, the outer periphery of the needle seat 12 is provided with a first boss 13 and a second boss 14, the first boss 13 is provided close to the needle head 11, and the radial width of the first boss 13 is smaller than that of the second boss 14. Before the adjusting portion 6 is triggered, the limiting plate 4 is clamped against the second boss 14, the limiting block 41 is located between the first boss 13 and the second boss 14, and abuts against the outer periphery of both sides of the first boss 13 to limit it, at this time, the two ends of the compression spring 3 abut against the second boss 14 and the limiting block 41 respectively, and the compression spring 3 is in a compressed state.

[0035] Furthermore, after the adjusting portion 6 is touched, the first boss 13 and the second boss 14 release the limit of the limit assembly, and the compression spring 3 is extended to the reset state, and one end of the compression spring 3 abuts against the second boss 14 to push the second boss 14 to move. When the second boss 14 moves, it pulls the needle seat 12 and the needle 11 back into the sleeve 5, and the first boss 13 is accommodated in the compression spring 3 when moving.

[0036] Specifically, in some embodiments, referring to Figure 2 and Figure 3 As shown, the adjustment part 6 includes an adjustment handle 61 and a pair of guide pillars 62. The adjustment handle 61 is located outside the sleeve 5 and is pulled back by the operator. Furthermore, the surface of the adjustment handle 61 is provided with convex patterns for easy touch identification by the operator. One end of the guide pillar 62 is connected to the adjustment handle 61, and the other end thereof extends into the cavity inside the sleeve 5 through the waist-shaped hole 51 of the sleeve 5 wall. The pair of guide pillars 62 are respectively located on both sides of the needle core 1 and are arranged between the needle core 1 and the limit plate 4. When the adjustment handle 61 is touched, the adjustment handle 61 is pulled back in the direction away from the needle head 11, and then the guide pillar 62 moves along the waist-shaped hole 51, and the length direction of the waist-shaped hole 51 is parallel to the axial direction of the sleeve 5.

[0037] Further, see Figure 3 and Figure 4As shown, the side surface of the limit plate 4 facing the setting includes a contact surface 42, and the contact surface 42 is used to connect the free end of the limit plate 4 and the limit block 41; before the adjusting handle 61 is touched, the free end of the guide column 62 is located between the contact surface 42 and the needle seat 12; after the adjusting handle 61 is touched, the outer peripheral surface of the guide column 62 moves closely against the contact surface 42, so that the limit plate 4 can rotate around its fixed end toward the inner wall of the sleeve 5, and then the free end of the limit plate 4 moves toward the inner wall of the sleeve 5, and the The increase in the distance between the limit blocks 41 releases the limitation on the compression spring 3 and the first boss 13, and the increase in the distance between the limit plates 4 releases the limitation on the second boss 14; in some embodiments, in order to enable the guide column 62 to move smoothly and increase the distance of the limit plates 4, the abutment surface 42 is set as a plane inclined from the barrel wall of the sleeve 5 toward the direction of the needle core 1; in other embodiments, the abutment surface 42 can also be set as a curved surface inclined from the barrel wall toward the direction of the needle core 1, or a combination of a plane and a curved surface, but is not limited to this.

[0038] Further, see Figure 4 As shown, the free end of the limit plate 4 is inclined from the wall of the sleeve 5 toward the needle core 1, and at the same time, the guide column 62 applies force to the abutment surface 42 to move the free end of the limit plate 4 toward the wall of the sleeve 5. In order to prevent the limit plate 4 from breaking when the needle 11 is pulled back, a reinforcing rib 44 is provided at a position of the limit plate 4 corresponding to the limit block 41. The reinforcing rib 44 is located on the side surface of the limit plate 4 away from the needle core 1, and is used to improve the structural strength of the limit assembly and extend the service life of the blood collection needle.

[0039] Specifically, refer to Figure 2 and Figure 5 As shown, in some embodiments, a fixing block 43 is provided at one end of the limit plate 4 fixed to the inner wall of the sleeve 5, and a plug-in groove 52 matching with the fixing block 43 is provided on the inner wall of the sleeve 5; further, in some embodiments, the sleeve 5 is configured as a split structure, and the ends of the fixing block 43 are respectively fixed in the plug-in groove 52 of the split sleeve for easy assembly; in some embodiments, the sleeve 5 can also be configured as an integral structure and fixedly connected to one end of the limit plate 4.

[0040] Specifically, refer to Figure 1 As shown, the automatic retractable safety blood collection needle is also provided with a connecting tube 7 and a collecting device; the interior of the needle core 1 is hollow, the connecting tube 7 is connected to the needle seat 12 and communicates with the interior of the needle core 1 for transmitting the blood sample collected by the needle 11, and the connecting tube 7 is also connected to the collecting device for collecting blood samples.

[0041] Specifically, refer to Figure 1As shown, the automatic retractable safety blood collection needle also includes a butterfly handle 9, which is arranged outside the sleeve 5 and is used by the operator to stably hold and insert the needle to avoid slipping when directly holding the sleeve 5 to affect blood sample collection.

[0042] The working principle of the automatic retraction safety blood collection needle described in the present invention is as follows:

[0043] When the automatic retractable safety blood collection needle is transported, the limit plate 4 limits the first boss 13 and the second boss 14, the limit block 41 abuts against and limits the first boss 13, and the compression spring 3 is in a compressed state between the second boss 14 and the limit block 41; it is not easy to trigger during transportation, and a protective tube 8 is provided outside the needle 11, which has high safety;

[0044] When the automatic retractable safety blood collection needle is used to collect blood samples, the protective tube 8 is pulled out, the butterfly handle 9 is held to perform the needle, and the sample enters the collection device through the needle core 1 and the connecting tube 7;

[0045] After the blood collection is completed, the automatic retractable safety blood collection needle triggers the adjusting portion 6 to make the guide column 62 move along the waist-shaped hole 51, and the guide column 62 is close to the abutment surface 42 when moving; when the adjusting portion 6 is triggered to the end of the stroke, the guide column 62 supports the limit plate 4 and applies pressure toward the cylinder wall, and the free end of the limit plate 4 rotates around one end fixed to the cylinder wall, thereby increasing the gap between the pair of limit plates 4 and the distance between the pair of limit blocks 41, and the first boss 1 3 and the second boss 14 are released from the limit; the compression spring 3 pushes the second boss 14 abutting against it to extend, and the needle 11 is pulled back into the cavity of the sleeve 5 by the compression spring 3 and the needle seat 12, completing the recovery of the needle 11; during the resetting process of the compression spring 3, the first boss 13 is accommodated in the compression spring 3, and the first boss 13 completes the recovery action after moving past the limit block 41; the adjusting portion 6 is released, and the guide column 62 is pushed back by the abutting surface 42.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An automatic retractable safety blood collection needle, characterized in that: include, The needle core comprises a needle head and a needle seat which are plugged into each other, wherein the outer periphery of the needle seat is provided with a first boss and a second boss, wherein the first boss is provided close to the needle head; and the radial width of the first boss is smaller than that of the second boss; A trigger part, comprising a compression spring and a limit assembly; one end of the compression spring abuts against the second boss, and the first boss can be accommodated inside the compression spring; the limit assembly comprises limit plates symmetrically arranged on both sides of the needle seat, and the limit plates are both provided with raised limit blocks facing the needle seat; A sleeve, wherein the sleeve has an axial cavity inside, and the needle core is inserted into the cavity; one end of the limit plate is fixed to the inner wall of the sleeve, and a gap is formed between the free end of the limit plate and the inner wall of the sleeve; An adjusting portion, the adjusting portion being disposed on the wall of the sleeve and configured to enable the free end of the limiting plate to move toward the inner wall of the sleeve when triggered; Before the adjusting part is touched, a pair of limit plates clamp the second boss, the limit block is used to abut and limit the first boss, and the compression spring is in a compressed state and abuts between the second boss and the limit block; after the adjusting part is touched, the free end of the limit plate rotates around one end fixed to the sleeve, the first boss and the second boss are released from the limit, the compression spring is in a reset state and pulls the needle into the cavity of the sleeve.

2. The automatic retractable safety blood collection needle according to claim 1, characterized in that: The adjustment part includes an adjustment handle and a pair of guide pillars. The adjustment handle is located outside the sleeve and connected to one end of the guide pillar. The other end of the guide pillar passes through the wall of the sleeve and extends into the cavity inside the sleeve. The pair of guide pillars are respectively located on both sides of the needle core.

3. The automatic retractable safety blood collection needle according to claim 2, characterized in that: A waist-shaped hole is arranged on the wall of the sleeve at a position corresponding to the adjusting portion, and the length direction of the waist-shaped hole is parallel to the axial direction of the sleeve; after the adjusting handle is touched, the guide column moves along the waist-shaped hole.

4. The automatic retractable safety blood collection needle according to claim 3, characterized in that: The side surface opposite to the limit plate includes an abutment surface, which is used to connect the free end of the limit plate and the limit block; when the adjustment handle is touched, the guide column moves close to the abutment surface, so that the limit plate rotates around its fixed end toward the inner wall of the sleeve.

5. The automatic retractable safety blood collection needle according to claim 4, characterized in that: The abutting surface is configured as a plane inclined from the wall of the sleeve toward the needle core.

6. The automatic retractable safety blood collection needle according to claim 2, characterized in that: The surface of the adjusting handle is provided with convex patterns.

7. The automatic retractable safety blood collection needle according to claim 1, characterized in that: A fixing block is arranged at one end of the limiting plate fixed to the inner wall of the sleeve, and a plug-in slot matched with the fixing block is arranged on the inner wall of the sleeve.

8. The automatic retractable safety blood collection needle according to claim 1, characterized in that: It also includes a connecting tube, the interior of the needle core is hollow, and the connecting tube is connected to the needle seat and communicated with the interior of the needle core.

9. The automatic retractable safety blood collection needle according to claim 1, characterized in that: It also includes a protective tube, which is sleeved on the end of the needle extending out of the sleeve.

10. The automatic retractable safety blood collection needle according to claim 1, characterized in that: Reinforcing ribs are also provided on the surface of the limiting plate at positions corresponding to the limiting blocks.

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