A high sealing blood lancet rubber plug

Abstract

The utility model relates to medical instrument technical field discloses a kind of high sealing property blood collector rubber plug, including soft plug, sealing mechanism and protection mechanism, sealing mechanism includes fixed at the bottom end of soft plug and the conical friction cone of opening downward, the guide ring that surrounds the outer wall of friction cone and the opening reverse, the convex ring one located in the middle of soft plug and the insertion slot and convex ring two located in the bottom of soft plug top end, protection mechanism is formed by the splicing of left-right symmetrical semicircular cover one and semicircular cover two, and by inner wall snap ring fixed in soft plug top end clamping groove, semicircular cover top is equipped with through-hole and dustproof paste.The utility model forms the triple redundancy seal of bottom prying, middle filling, top wrapping by friction cone, convex ring and insertion slot, effectively solve the problem of insufficient sealing of existing rubber plug, while protection mechanism provides sterile barrier and needle clamping function, improves the stability and security of blood collection process.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a high-sealing blood collection device rubber stopper. Background Technology

[0002] In clinical medical testing, vacuum blood collection systems are widely used due to their safety and efficiency. As a key component of the system, the blood collection tube stopper is mainly used to seal the tube opening to maintain the preset vacuum level and prevent blood samples from leaking or being contaminated by the external environment. Therefore, the sealing performance of the stopper is directly related to the success rate of blood collection and the accuracy of sample test results.

[0003] However, existing blood collection device stoppers mostly use a single cylindrical or simple inverted conical structure to directly press into the test tube opening for sealing. This structure mainly relies on the elastic expansion of the stopper material itself to fit the tube wall. However, in actual use, due to slight differences in tube opening size caused by the test tube manufacturing process or unevenness of the tube opening edge, a single radial compression seal is often unable to completely fill the micro gaps between the contact surfaces. Especially after transportation vibration or long-term storage, the vacuum level is prone to decrease or even air leakage, resulting in insufficient blood collection or sample failure. In addition, traditional stoppers also have shortcomings in the puncture blood collection process. Since the body of the stopper is usually relatively soft, it lacks rigid support after the blood collection needle is inserted and is easily pulled by external forces, causing it to shake. This not only increases the patient's pain and discomfort, but the violent shaking may also cause the puncture point to enlarge, further damaging the sealing environment and causing blood leakage or external air backflow, seriously affecting the safety and airtightness of the blood collection process.

[0004] Therefore, this invention proposes a high-sealing blood collection device rubber stopper to address the shortcomings of existing technologies. Utility Model Content

[0005] In view of the problems existing in the blood collection device rubber stopper, such as the single radial compression sealing method being unable to adapt to the small deformation of the test tube opening leading to sealing failure, easy air leakage during long-term storage, and the lack of dust protection for the puncture site and needle fixing structure leading to unstable blood collection process and obvious pain for patients, this utility model aims to provide a blood collection device rubber stopper with improved structure that can effectively solve the above problems.

[0006] This utility model provides a high-sealing blood collection device stopper, comprising: a soft stopper, and a sealing mechanism and a protective mechanism disposed on the soft stopper.

[0007] The sealing mechanism includes a friction cone, a guide ring, a first convex ring, a slot, and a second convex ring. The friction cone is fixedly connected to the bottom end of the soft plug. The friction cone is conical in shape and its opening faces downward. The guide ring is fixedly connected to the outer wall of the friction cone circumferentially. The opening direction of the guide ring is opposite to the opening direction of the friction cone. The first convex ring is fixedly connected to the lower middle part of the outer wall of the soft plug circumferentially. The slot is opened circumferentially at the bottom of the top of the soft plug. The second convex ring is fixedly connected to the inner wall of the slot.

[0008] Furthermore, a groove is provided on the outer wall of the top of the soft plug along the circumference, and a retaining ring is fixedly connected to the inner wall of the protective mechanism. The retaining ring is engaged inside the groove to fix the protective mechanism to the top of the soft plug.

[0009] Preferably, the friction cone undergoes elastic deformation under pressure to generate a restoring force that adheres tightly to the test tube wall, the guide ring is used to guide the soft plug into the test tube and increase the friction with the tube wall, and the convex ring is used to fill the gap between the soft plug and the test tube wall and provide auxiliary sealing.

[0010] Preferably, the depth and width of the slot are configured to accommodate the top opening of a conventional test tube, and the second convex ring cooperates with the slot to form a tightly sealed encapsulated structure with the inner or outer wall after the test tube is inserted.

[0011] Preferably, the protective mechanism includes a first semicircular cover and a second semicircular cover, which are symmetrically arranged on the left and right sides of the top of the soft plug.

[0012] Preferably, the retaining ring is segmented and disposed on the inner wall of the first semicircular cover and the second semicircular cover, and the first semicircular cover and the second semicircular cover are spliced ​​together to form a complete cover structure. The overall fixation of the protective mechanism is achieved by the cooperation of the segmented retaining ring with the slot at the top of the soft plug.

[0013] Preferably, the contact surfaces of the first semicircular cover and the second semicircular cover are respectively provided with tenons and slots, and the tenons are inserted into the slots to achieve the positioning and fixed connection of the first semicircular cover and the second semicircular cover in the horizontal direction.

[0014] Preferably, a through hole is provided in the middle of the top wall of the first semicircular cover and the middle of the top wall of the second semicircular cover. The through hole penetrates the top walls of the first and second semicircular covers to form a channel for the blood collection needle to pass through.

[0015] Preferably, the diameter of the through hole is adapted to the diameter of the blood collection needle, and is used to physically clamp the needle shaft after the blood collection needle is inserted, so as to prevent the needle from shaking or displacing during the blood collection process.

[0016] Preferably, dustproof stickers are affixed to the middle of the top wall of the first semicircular cap and the middle of the top wall of the second semicircular cap. The dustproof stickers cover the through hole to form a sterile protective barrier, preventing the external environment from contaminating the puncture area at the top of the soft plug.

[0017] Preferably, the soft plug, the friction cone, the guide ring, the first convex ring, and the second convex ring are rubber structures manufactured using an integral injection molding process, and the protective mechanism is a rigid plastic structure with a certain degree of rigidity, so as to balance good sealing elasticity and protective strength.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problem of reduced sealing performance of existing blood collection device rubber stoppers caused by slight deformation of the test tube opening or insufficient fit of a single sealing structure by setting a downward-facing conical friction cone and a guide ring with a reverse opening at the bottom of the soft stopper, combined with a convex ring in the middle and a covering slot structure at the top. It achieves the effect of using multiple redundant sealing structures to block air from entering in all directions, significantly improving the overall sealing performance and stability of the blood collection process.

[0019] 2. This utility model solves the problems of existing rubber stoppers lacking effective dust protection during storage and blood collection, as well as the problem of blood collection needles easily shaking and causing pain to patients, by setting a protective mechanism composed of two semi-circular caps spliced ​​together at the top of the soft stopper and using a dustproof sticker to cover the through hole in the middle of the cap. It achieves the effect of forming a sterile protective barrier before blood collection to reduce the risk of contamination, and using the through hole to physically hold the needle during blood collection to reduce shaking and improve patient comfort. Attached Figure Description

[0020] Figure 1 A perspective view of a high-sealing rubber stopper for a blood collection device proposed in this utility model; Figure 2 This is an exploded view of a high-sealing blood collection device rubber stopper proposed in this utility model; Figure 3 This is a split view of the sealing mechanism of a high-sealing blood collection device rubber plug proposed in this utility model; Figure 4 This is a partial structural cross-sectional view of a high-sealing blood collection device rubber plug proposed in this utility model; Figure 5 A split view of the protective mechanism for a high-sealing blood collection device rubber stopper proposed in this utility model; Figure 6 This is a cross-sectional view of a protective mechanism for a high-sealing blood collection device rubber plug proposed in this utility model.

[0021] Legend: 1. Soft plug; 2. Sealing mechanism; 201. Raised ring one; 202. Friction cone; 203. Guide ring; 204. Slot; 205. Raised ring two; 3. Protective mechanism; 301. Semicircular cover one; 302. Dustproof sticker; 303. Semicircular cover two; 304. Snap ring; 305. Annular groove; 306. Tenon; 307. Snap groove; 308. Through hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0023] Please refer to Figures 1 to 6 This utility model provides a high-sealing blood collection device stopper, which aims to solve the problems of reduced sealing performance of existing blood collection device stoppers after insertion into test tubes due to slight deformation of the test tube opening or insufficient fit, as well as the lack of effective needle fixation and dust protection.

[0024] Please refer to Figure 1 and Figure 2 A high-sealing blood collection device stopper includes a soft stopper 1, a sealing mechanism 2 and a protective mechanism 3 disposed on the soft stopper 1. The soft stopper 1 serves as the mounting base of the integral structure for insertion into a test tube containing blood. The sealing mechanism 2 is disposed in the lower middle part and the top bottom of the soft stopper 1 to provide multiple redundant seals to isolate external air. The protective mechanism 3 is disposed at the top of the soft stopper 1 to form a sterile protective barrier and assist in fixing the blood collection needle.

[0025] Please refer to Figure 3 and Figure 4 The sealing mechanism 2 includes a friction cone 202, a guide ring 203, a first convex ring 201, a slot 204, and a second convex ring 205. The friction cone 202 is fixedly connected to the bottom end of the soft stopper 1. The friction cone 202 has a conical shape and its opening direction is downward. The friction cone 202 is used to undergo elastic deformation under the pressure of the tube wall after being inserted into the test tube and generate radial elastic force to tightly adhere to the test tube wall. The guide ring 203 is fixedly connected to the outer wall of the friction cone 202 in the circumferential direction. The opening direction of the guide ring 203 is opposite to the opening direction of the friction cone 202. The guide ring 203 is used to guide the soft stopper 1 during insertion and increase the frictional resistance with the tube wall. The first convex ring 201 is fixedly connected to the lower middle part of the outer wall of the soft stopper 1 in the circumferential direction. The first convex ring 201 is used to fill the tiny gaps between the soft stopper 1 and the test tube wall and further increase the frictional force to prevent the soft stopper 1 from falling off.

[0026] Please refer to Figure 3 and Figure 4 The bottom of the top of the soft stopper 1 is provided with a slot 204 along the circumferential direction. The slot 204 is used to accommodate the top opening of the test tube after the soft stopper 1 is inserted into place. The second convex ring 205 is fixedly connected to the inner wall of the slot 204. The second convex ring 205 is used to form a tight contact with the top of the test tube embedded in the slot 204 to wrap and seal the test tube opening. The soft stopper 1, friction cone 202, guide ring 203, first convex ring 201 and second convex ring 205 are all made of rubber material that is integrally injection molded to ensure the connection strength and sealing elasticity of the overall structure.

[0027] Please refer to Figure 5 and Figure 6 The outer wall of the top of the soft plug 1 is provided with an annular groove 305 along the circumference. The annular groove 305 is used to provide a limiting space for the installation and fixation of the protection mechanism 3. The inner wall of the protection mechanism 3 is fixedly connected with a retaining ring 304. The shape and size of the retaining ring 304 are adapted to the annular groove 305. The retaining ring 304 is engaged in the interior of the annular groove 305. The protection mechanism 3 is fixedly connected to the top of the soft plug 1 through the cooperation of the retaining ring 304 and the annular groove 305. The protection mechanism 3 is used to cover the needle insertion area at the top of the soft plug 1.

[0028] Please refer to Figure 5 and Figure 6 The protective mechanism 3 includes a semi-circular cover 301 and a semi-circular cover 303. Both the semi-circular cover 301 and the semi-circular cover 303 are semi-circular and made of hard plastic. The semi-circular cover 301 and the semi-circular cover 303 are symmetrically arranged on the top left and right sides of the soft plug 1. The semi-circular cover 301 and the semi-circular cover 303 are spliced ​​together to form a complete circular cover. This split splicing structure facilitates the quick assembly and disassembly of the protective mechanism 3 on the soft plug 1.

[0029] The contact surfaces of the first semicircular cover 301 and the second semicircular cover 303 are respectively provided with tenons 306 and slots 307. The tenon 306 is a tenon structure protruding from the contact surface, and the slot 307 is a groove structure that is recessed from the contact surface and whose shape matches the tenon 306. In the assembled state, the tenon 306 is inserted into the inside of the slot 307. The insertion and cooperation of the tenon 306 and the slot 307 realizes the positioning and connection of the first semicircular cover 301 and the second semicircular cover 303 in the horizontal direction, thereby ensuring that the assembled protective mechanism 3 has good integrity and structural strength.

[0030] Both the inner walls of the first semicircular cover 301 and the second semicircular cover 303 are fixedly connected with retaining rings 304. The retaining rings 304 are arc-shaped protrusions that extend circumferentially along the inner walls of the semicircular covers. When the first semicircular cover 301 and the second semicircular cover 303 are spliced ​​and wrapped around the top of the soft plug 1, the retaining rings 304 distributed on the inner walls of the first semicircular cover 301 and the second semicircular cover 303 are also embedded in the annular groove 305 at the top of the outer wall of the soft plug 1. This matching structure of the retaining rings 304 and the annular groove 305 ensures that the protective mechanism 3 is firmly restricted in the vertical direction at the top of the soft plug 1, preventing the protective mechanism 3 from accidentally falling off due to external force.

[0031] Both the top wall of the first semicircular cover 301 and the top wall of the second semicircular cover 303 have through holes 308. The through holes 308 penetrate the top walls of the first semicircular cover 301 and the second semicircular cover 303. The through holes 308 are used for physical clamping during blood collection, thereby effectively preventing the needle from shaking during blood collection, reducing patient pain and maintaining sealing stability.

[0032] As a preferred embodiment, to ensure smooth insertion of the soft stopper 1 into the test tube and reliable sealing, please refer to... Figure 3 and Figure 4 The outer diameter of the guide ring 203 of the friction cone 202 is set to be less than or equal to the maximum outer diameter of the friction cone 202. This size fit ensures that during the insertion of the soft stopper 1 into the test tube, the guide ring 203 can contact the test tube wall before or simultaneously with the friction cone 202, thereby playing a pre-guiding role and preventing the friction cone 202 from curling or excessively deforming due to uneven force.

[0033] As a preferred embodiment, to maintain the sterility of the needle insertion area before blood collection, please refer to... Figure 5 Dustproof stickers 302 are affixed to the middle of the top wall of the first semi-circular cover 301 and the middle of the top wall of the second semi-circular cover 303. The dustproof stickers 302 cover the through hole 308. The dustproof stickers 302 are made of sterile breathable material or sealing film. Before blood collection, the dustproof stickers 302 completely cover the through hole 308 to prevent external dust and bacteria from entering the puncture area at the top of the soft plug 1. When in use, the dustproof stickers 302 need to be removed to expose the through hole 308 for needle use.

[0034] As a preferred embodiment, in order to ensure the manufacturability and performance of the overall structure, the soft plug 1, friction cone 202, guide ring 203, convex ring one 201, and convex ring two 205 are designed as an integral injection molded structure, and the material is medical-grade butyl rubber or thermoplastic elastomer. This integral molding process not only simplifies the production process and avoids assembly gaps between components, but also ensures the structural stability and airtightness of each sealing component under repeated puncture and long-term storage conditions.

[0035] As a preferred embodiment, in order to further enhance the stability of the soft stopper 1 in the test tube, the cross-sectional shape of the convex ring 201 can be designed as semi-circular or trapezoidal, and the outer diameter of the convex ring 201 is slightly larger than the inner diameter of the test tube. Through this interference fit design, the convex ring 201 will be subjected to radial compression by the test tube wall after insertion, thereby generating continuous frictional resistance, effectively preventing the soft stopper 1 from slipping out of the test tube mouth under transportation vibration or accidental collision.

[0036] Working principle: Before blood collection, the soft stopper 1 is inserted into the test tube containing the blood. Since the sealing mechanism 2 is installed in the lower middle part of the soft stopper 1 and the friction cone 202 is fixedly connected to the bottom of the soft stopper 1, the whole structure is a cone with the opening facing down. When the soft stopper 1 is inserted into the test tube, the test tube wall will squeeze the friction cone 202 inward to undergo elastic deformation and generate a reverse elastic force to stick tightly to the test tube wall. Thus, the blocked elastic deformation is used to improve the sealing effect at the bottom. During the insertion of the soft plug 1, since the friction cone 202 surrounds the outer wall along the circumference of the guide ring 203, and the opening of the guide ring 203 faces the opposite direction to the friction cone 202, the guide ring 203 can play a guiding role during the insertion of the soft plug 1 and the friction cone 202, avoiding uneven force on the friction cone 202. At the same time, the guide ring 203 can also increase the friction with the pipe wall, thereby further ensuring the sealing performance. As the soft stopper 1 continues to extend, since the lower part of the outer wall of the soft stopper 1 is fixedly connected with the convex ring 201, the convex ring 201 can fill the gap between this and the test tube wall, and at the same time increase the friction force, thereby assisting the friction cone 202 to seal, preventing the soft stopper 1 from falling off due to external force, and improving the stability of insertion. Once the soft stopper 1 is fully inserted, the top opening of the test tube will be inserted into the slot 204 circumferentially opened at the bottom of the soft stopper 1. The second convex ring 205 fixedly connected to the inner wall of the slot 204 will form a tight contact with the test tube wall, thereby improving the sealing of the top of the test tube and preventing the reduction of sealing due to slight deformation of the test tube opening. Through the multiple redundant sealing cooperation of the friction cone 202, the first convex ring 201 and the second convex ring 205, the overall sealing of the blood collection process is significantly enhanced. When the soft stopper 1 is in storage or ready-to-use state, since the first semi-circular cap 301 and the second semi-circular cap 303 are symmetrically arranged on the left and right sides of the soft stopper 1, and the top wall of the first semi-circular cap 301 and the second semi-circular cap 303 are both affixed with a dustproof sticker 302, the first semi-circular cap 301, the dustproof sticker 302 and the second semi-circular cap 303 together form a protective barrier in the needle insertion area at the top of the soft stopper 1, preventing external dust and bacteria from entering the area, thereby ensuring the sterility of the soft stopper 1 and reducing the probability of blood contamination; When needed, after tearing off the dust cover 302, the blood collection needle can be inserted through the through hole 308 at the top of the semi-circular cover 301 and the semi-circular cover 303. Since the diameter of the through hole 308 fits tightly with the diameter of the needle, the needle will be clamped in the through hole 308 after insertion, thereby preventing the needle from shaking due to external force, reducing the discomfort of the person being blood collected and improving the sealing stability. Since the annular groove 305 is circumferentially formed on the top of the outer wall of the soft plug 1, the inner walls of the first semicircular cover 301 and the second semicircular cover 303 are fixedly connected with retaining rings 304. At the same time, the contact surfaces of the first semicircular cover 301 and the second semicircular cover 303 are provided with tenons 306 and matching grooves 307. The tenons 306 and the matching grooves 307 are interlocked so that the first semicircular cover 301 and the second semicircular cover 303 are spliced ​​into a whole on the top of the soft plug 1. Under the limiting effect of the annular groove 305 and the retaining ring 304, the protective mechanism 3 will not be pulled out by external force, thus ensuring the installation stability of the protective mechanism 3 at the top of the soft plug 1.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-sealing blood collection device rubber stopper, comprising: A soft plug (1), and a sealing mechanism (2) and a protective mechanism (3) disposed on the soft plug (1); Its features are, The sealing mechanism (2) includes a friction cone (202), a guide ring (203), a first convex ring (201), a slot (204), and a second convex ring (205). The friction cone (202) is fixedly connected to the bottom end of the soft plug (1). The friction cone (202) is cone-shaped and has its opening facing downward. The guide ring (203) is fixedly connected to the outer wall of the friction cone (202) in the circumferential direction. The opening direction of the guide ring (203) is opposite to the opening direction of the friction cone (202). The first convex ring (201) is fixedly connected to the lower middle part of the outer wall of the soft plug (1) in the circumferential direction. The slot (204) is opened in the bottom of the top of the soft plug (1) in the circumferential direction. The second convex ring (205) is fixedly connected to the inner wall of the slot (204). The soft plug (1) has an annular groove (305) on the outer wall of its top end along the circumferential direction. The inner wall of the protective mechanism (3) is fixedly connected with a retaining ring (304). The retaining ring (304) is engaged inside the annular groove (305) to fix the protective mechanism (3) to the top end of the soft plug (1).

2. The high-sealing blood collection device stopper according to claim 1, characterized in that, The friction cone (202) deforms under pressure to generate an elastic restoring force to fit tightly against the test tube wall. The guide ring (203) is used to guide the soft plug (1) to be inserted and increase the friction with the test tube wall. The convex ring (201) fills the gap between the soft plug (1) and the test tube wall.

3. The high-sealing blood collection device stopper according to claim 1, characterized in that, The slot (204) is used to receive the top of the test tube, and the second convex ring (205) is used to form a tight contact seal with the inner or outer wall of the top of the test tube.

4. The high-sealing blood collection device stopper according to claim 1, characterized in that, The protective mechanism (3) includes a semi-circular cover one (301) and a semi-circular cover two (303), which are symmetrically arranged on the left and right sides of the top of the soft plug (1).

5. The high-sealing blood collection device stopper according to claim 4, characterized in that, The retaining ring (304) is segmented and disposed on the inner wall of the first semicircular cover (301) and the inner wall of the second semicircular cover (303), and the first semicircular cover (301) and the second semicircular cover (303) are spliced ​​together to form a complete cover.

6. The high-sealing blood collection device stopper according to claim 5, characterized in that, The semicircular cover one (301) and the semicircular cover two (303) are respectively provided with a tenon (306) and a slot (307) on their contact surfaces. The tenon (306) is inserted into the slot (307) to achieve a fixed connection between the semicircular cover one (301) and the semicircular cover two (303).

7. The high-sealing blood collection device stopper according to claim 4, characterized in that, A through hole (308) is provided in the middle of the top wall of the first semicircular cover (301) and the middle of the top wall of the second semicircular cover (303). The through hole (308) penetrates the top wall of the first semicircular cover (301) and the second semicircular cover (303).

8. The high-sealing blood collection device stopper according to claim 7, characterized in that, The diameter of the through hole (308) is adapted to the diameter of the blood collection needle and is used to clamp the blood collection needle after it is inserted to prevent it from shaking.

9. The high-sealing blood collection device stopper according to claim 7, characterized in that, Dustproof stickers (302) are affixed to the middle of the top wall of the first semicircular cover (301) and the middle of the top wall of the second semicircular cover (303). The dustproof stickers (302) cover the through hole (308) to form a sterile protective barrier.

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