Medical tubing lock fitting

Abstract

The application relates to the technical field of medical devices, in particular to a medical pipeline locking joint which comprises a joint main body, a locking head and a sleeve, one end of the joint main body is provided with a connecting section, the outer side of the connecting section is provided with threads; the end face of the connecting section is provided with a mounting section, the outer side wall of the mounting section is a first taper face; a through hole is arranged in the joint main body; two outwardly extending side wings are arranged in the middle section of the joint main body; a threaded hole is arranged at one end of the locking head, a mounting hole is arranged at the other end of the locking head, the side wall of the mounting hole is a second taper face; the locking head is provided with a recess; two clamping grooves are arranged on the side wall of the sleeve, and a protruding block is arranged on the end face of the sleeve; during installation, the pipeline is sleeved on the first taper face, the locking head is mounted on the joint main body, and the second taper face is attached to the outer wall of the pipeline; the two side wings are inserted into corresponding clamping grooves, and the end of the clamping groove close to the locking head is attached to the side wing; the end face of the sleeve is attached to the locking head, and the protruding block is inserted into the recess. The application can effectively improve the fixing effect of the joint on the pipeline and avoid the falling of the pipeline.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical tubing locking connector. Background Technology

[0002] In some medical settings, quick and easy installation and removal of tubing is required. Quick-release locking connectors are used for this purpose. Existing connectors typically use a locking head and a connector body with two conical surfaces to clamp the tubing, secured by threads. However, some medications or liquids administered directly to the body have specific material requirements for their tubing and connectors. This particular plastic material is relatively soft, and with existing connector structures, the threads can easily loosen. As the threads loosen, the clamping force of the two conical surfaces decreases, making the tubing prone to detachment and compromising its secure hold. Summary of the Invention

[0003] This invention provides a medical tubing locking connector, which can effectively solve the problems in the background art.

[0004] The present invention provides a medical tubing locking connector, comprising a connector body, a locking head, and a sleeve;

[0005] A connecting section is provided at one end of the connector body, and a thread is provided on the outer side of the connecting section; an installation section is provided on the end face of the connecting section, and the outer wall of the installation section is a first conical surface; a through hole is provided inside the connector body; two opposing side wings are provided in the middle section of the connector body, and both side wings extend outward.

[0006] The locking head has a threaded hole at one end and a mounting hole at the other end. The sidewall of the mounting hole is a second conical surface. The end face of the locking head has a recessed hole.

[0007] The sleeve sidewall is provided with two opposing slots, and the end face is provided with a protrusion;

[0008] During installation, the pipe is fitted onto the first conical surface, and the locking head is installed on the connector body through the threaded hole, so that the second conical surface fits against the outer wall of the pipe; both side wings extend into a corresponding slot, and the end of the slot near the locking head fits against the side wing; the end face of the sleeve fits against the locking head, and the protrusion extends into the concave hole.

[0009] Furthermore, the end face of the flank facing the connecting section is set as a first inclined surface.

[0010] Furthermore, the sleeve is provided with two opposing receiving shells, and the interior of the receiving shells forms a slot, with each side wing set in a corresponding receiving shell.

[0011] Furthermore, the surface where the card slot fits into the side wing is set as a second inclined surface, and the slope of the second inclined surface is less than that of the first inclined surface, so that the contact point between the second inclined surface and the first inclined surface is located on the side of the side wing away from the connector body.

[0012] Furthermore, an opening is provided at the end of the housing away from the connecting section, and a limiting boss is provided at the opening so that the width of the opening is less than the thickness of the side wing.

[0013] Furthermore, the through hole includes a constant diameter section and a tapered section; the constant diameter section has the same diameter at all points and is located within the first tapered surface; the diameter of the sidewall of the tapered section gradually decreases towards the first tapered surface.

[0014] Furthermore, the tapered segment includes a first segment and a second segment; the first segment is close to the constant diameter segment and extends to the end position of the side wing; the side wall taper of the first segment is greater than the side wall taper of the second segment.

[0015] Furthermore, ramps are provided on both sides of the protrusion and both sides of the concave hole.

[0016] Furthermore, the taper of the first cone is greater than the taper of the second cone.

[0017] Furthermore, a stepped surface is provided inside the locking head at the position between the threaded hole and the mounting hole to abut the end of the connecting section.

[0018] The technical solution of this invention can achieve the following technical effects:

[0019] This connector, through the cooperation of the connector body, locking head, and sleeve, utilizes the end face of the sleeve to fit against the locking head, and the end of the sleeve near the locking head to fit against the side wing, thereby fixing the sleeve axially. Furthermore, the protrusion on the sleeve extends into the concave hole, thus restricting the rotation of the sleeve through the two side wing and the rotation of the locking head through the protrusion, thereby preventing the pipeline from loosening due to the rotation of the locking head and improving the reliability of pipeline fixation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the medical tubing locking connector of the present invention;

[0022] Figure 2 This is an exploded view of the components of the medical tubing locking connector of the present invention;

[0023] Figure 3 This is a cross-sectional view of the medical tubing locking connector of the present invention in a state where the protrusion and the concave hole are not aligned;

[0024] Figure 4 This is a cross-sectional view of the medical tubing locking connector of the present invention in the state of alignment between the protrusion and the concave hole;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of point A;

[0026] Figure 6 For the present invention Figure 4 Sectional view at point B;

[0027] Figure 7 This is a schematic diagram of the locking head of the present invention;

[0028] Figure 8 This is a schematic diagram of another structure of the sleeve for the medical tubing locking connector of the present invention.

[0029] Reference numerals: 1. Connector body; 11. Connecting section; 12. Mounting section; 13. Through hole; 13a. Equal diameter section; 13b. First section; 13c. Second section; 14. Side wing; 2. Locking head; 21. Mounting hole; 22. Recessed hole; 3. Sleeve; 31. Slot; 32. Protrusion; 33. Receiving shell. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This invention relates to a medical tubing locking connector, such as... Figures 1-2 and Figure 7 As shown, the connector includes a main body 1, a locking head 2, and a sleeve 3. The specific structure of each component is as follows:

[0033] The connector body 1 has two ends, one for connecting to a pipeline and the other for connecting to external equipment. The end for connecting to the equipment can be designed with a specific connection structure; in this embodiment, a threaded installation structure is used, allowing the connector body 1 to be screwed into the equipment for fixation. The pipeline end has a connecting section 11 with threads on its outer side. The end face of the connecting section 11 has an installation section 12, the outer wall of which is a tapered surface with a gradually decreasing diameter; this tapered surface is designated as the first tapered surface. The interior of the connector body 1 has a through hole 13 for the flow of the liquid medicine. The middle section of the connector body 1 has two opposing (i.e., at a 180° angle) side wings 14, both extending outwards.

[0034] The locking head 2 has a threaded hole at one end and a mounting hole 21 at the other end. The sidewall of the mounting hole 21 is a tapered surface with a gradually decreasing diameter outwards; this tapered surface is referred to as the second tapered surface. Multiple recessed holes 22 are provided on the end face of the locking head 2, and these recessed holes 22 are evenly distributed circumferentially along the end face of the locking head 2. The locking head 2 is mounted on the connector body 1 through the threaded hole.

[0035] The sleeve 3 has two opposing slots 31 on its sidewall, the width of which is the same as that of the side wings 14. Multiple protrusions 32 are provided on the end face of the sleeve 3, evenly distributed circumferentially along the end face of the sleeve 3, and the number of protrusions 32 is the same as the number of recesses 22. The sleeve 3 is fitted onto the connector body 1, with both side wings 14 extending into their corresponding slots 31. The interior of the sleeve 3 does not completely fit against the connector body 1, allowing for some deformation space in the connector body 1.

[0036] The installation process and principle of this locking connector are as follows:

[0037] The connector body 1 is in direct contact with the liquid medicine, so it needs to be made of a special material to ensure the safety of the liquid medicine. The locking head 2 and the sleeve 3 are not in direct contact with the liquid medicine, so they can be made of a harder plastic material. During installation, first unscrew the locking head 2 to separate the first conical surface of the installation section 12 from the second conical surface of the installation hole 21. Then, insert the pipeline into the installation hole 21 and place it on the first conical surface. Tighten the locking head 2. As the locking head 2 is tightened, the first conical surface of the installation section 12 and the second conical surface of the installation hole 21 move closer together again, until the second conical surface fits against the outer wall of the pipeline to complete the pipeline installation. After the locking head 2 is tightened, the end face of the sleeve 3 is in contact with the locking head 2, and the end of the groove 31 near the locking head 2 is in contact with the side wing 14, thereby fixing the sleeve 3 in the axial direction. Moreover, the protrusion 32 extends into the concave hole 22, so that the two side wings 14 can restrict the rotation of the sleeve 3, and the protrusion 32 can restrict the rotation of the locking head 2. In this way, even if the material of the connector body 1 is relatively soft, the locking head 2 is unlikely to rotate during use, which would cause the locking head 2 to loosen, thus effectively ensuring the reliability of the pipeline connection.

[0038] In addition to restricting the rotation of the locking head 2 after installation, the protrusion 32 and the concave hole 22 can also make the user clearly feel the periodic resistance changes of the protrusion 32 and the concave hole 22 during the tightening process (the resistance increases when misaligned and decreases when aligned). There will be a clear "click" sound when tightening, thus providing clear feedback to the user and effectively preventing the locking head 2 from being under-tightened or over-tightened.

[0039] Preferably, the end face of the locking connector with side wing 14 facing the connecting section 11 is set as a first inclined surface, the principle of which is as follows:

[0040] by Figures 3-4 Taking the placement method as an example, when the locking head 2 is about to be tightened, if the locking head 2 is at an angle where the protrusion 32 and the concave hole 22 are not aligned, such as Figure 3 As shown, at this time, the protrusion 32 will abut against the end face of the locking head 2. If the locking head 2 continues to tighten, it will push the sleeve 3 to move downward relative to the connector body 1. In this way, the end face of the slot 31 will push the side wall of the side wing 14. Since the side wing 14 thickens the hardness of this part of the connector body 1, while the rest of the connector body 1 is thinner, under the push of the end face of the slot 31, the middle section of the connector body 1 will undergo a deformation in which the two side wings 14 approach each other and the whole body slightly flattens. The cross section of the connector body 1 will change from a circle to an ellipse.

[0041] As the locking head 2 continues to rotate, it reaches the angle where the protrusion 32 aligns with the concave hole 22, such as Figure 4 As shown, at this point, the locking head 2 can no longer push the sleeve 3, and the connector body 1 will no longer deform.

[0042] During the entire screwing process of the locking head 2, the protrusion 32 and the concave hole 22 will continuously switch between aligned and misaligned states. The entire connector body 1 will undergo slight flattening and recovery alternating changes. The pipe fitted onto the installation section 12 will be stretched open by the deformed connector body 1 and then recover along with the connector body 1 in this alternating change. Under the push of the second conical surface, the alternating stretching and recovery actions can generate a certain relative displacement between the inner wall of the pipe and the installation section 12, increasing the contact area between the pipe and the installation section 12. It can also smooth out uneven parts of the pipe through this small movement, ultimately allowing the first and second conical surfaces to clamp more pipe parts, and the stress is uniform in the circumferential direction of the pipe, thereby effectively ensuring the reliability of the pipe installation.

[0043] In addition, the alternating deformation of the connector body 1 can also solve the problem that the locking head 2 is difficult to continue rotating downward when the protrusion 32 and the concave hole 22 are not aligned. If the connector body 1 cannot deform, all the force will be concentrated on the protrusion 32, which will easily cause damage to the protrusion 32. In this connector, the deformation of the connector body 1 makes room for the protrusion 32 to move, which significantly reduces the stress acting on the protrusion 32, thereby effectively protecting the structural safety.

[0044] Sleeve 3 can be as follows Figure 8 The simple structure shown has slots 31 directly formed on both sides of the sleeve 3. However, with this structure, the user can easily grab the side wings 14 during installation, which affects the deformation of the connector body 1. Therefore, it is preferable to set two opposite receiving shells 33 on the sleeve 3. The inside of the receiving shell 33 forms a cavity similar in shape to the side wings 14 as the slots 31. Each side wing 14 is set in a corresponding receiving shell 33. The receiving shell 33 can shield the side wings 14, which can prevent the user from grabbing the side wings 14 during installation, causing the connector body 1 to deform in place and affecting the normal realization of the aforementioned functions.

[0045] Preferably, the surface where the slot 31 formed within the housing 33 (i.e., the cavity within the housing 33 with a shape similar to the side wing 14) fits against the side wing 14 is configured as a second inclined surface, and the slope of the second inclined surface is less than that of the first inclined surface, such as... Figure 5 As shown, the contact point between the second inclined surface and the first inclined surface is located on the side of the side wing 14 away from the connector body 1. In this way, when the side wing 14 is pushed at the end of the slot 31, the more outward contact point can more easily squeeze the two side wings 14, thereby causing the connector body 1 to deform.

[0046] Preferably, an opening is provided at the end of the housing 33 away from the connecting section 11, such as... Figure 6 As shown, the connector body 1 can be inserted into the receiving shell 33 through the opening; a limiting protrusion is provided at the opening so that the width of the opening is less than the thickness of the side wing 14. When inserting, the user only needs to push the side wing 14 to open the opening and allow the side wing 14 to slide in. After the side wing 14 slides into the receiving shell 33, unless the user deliberately pulls it, the side wing 14 cannot slide out from the opening, thereby preventing the connector body 1 and the sleeve 3 from separating.

[0047] Preferably, the through hole 13 is divided into a constant diameter section 13a and a tapered section. The constant diameter section 13a has the same diameter at all points and is located within the first tapered surface. This is the outlet of the liquid. The flow channel with the same diameter at all points allows the liquid to flow out smoothly. The diameter of the side wall of the tapered section gradually decreases towards the first tapered surface, which can avoid excessive scouring of the liquid caused by abrupt changes in the flow channel cross-section. In addition, during the tightening process of the locking head 2, the overall tapered section can avoid stress concentration inside the connector body 1, thereby preventing damage to the connector body 1.

[0048] Preferably, the tapered section is divided into a first segment 13b and a second segment 13c; the first segment 13b is close to the equal-diameter segment 13a and extends to the end of the side wing 14; the side wall taper of the first segment 13b is greater than that of the second segment 13c, so the rigidity of the first segment 13b with a larger taper will be stronger than that of the second segment 13c with a smaller taper and the equal-diameter segment 13a, thus forming a deformation fulcrum, causing the second segment 13c and the equal-diameter segment 13a to form a structure similar to a lever arm and deform. In this way, the deformation amplitude on both sides of the end of the joint body 1 will be more consistent, thereby better achieving the aforementioned effect of uniform pipeline stress.

[0049] Preferably, ramps are provided on both sides of the protrusion 32 and both sides of the recess 22. The two ramps are used to guide the protrusion 32 to slide out and into the recess 22 more smoothly, and to make the structural strength of the protrusion 32 higher, so as to avoid the protrusion 32 from breaking.

[0050] Preferably, the taper of the first conical surface is greater than that of the second conical surface. This causes the distance between the first and second conical surfaces to gradually increase outward, so that the compression deformation of the pipeline occurs within a gradually changing region. This allows the connector to adapt to pipelines of various wall thicknesses, thereby expanding its applicability.

[0051] Preferably, a stepped surface is provided inside the locking head 2 at the position between the threaded hole and the mounting hole 21. When the locking head 2 is screwed to the lowest position, the stepped surface will abut against the end of the connecting section 11. This avoids the locking head 2 being screwed in too much, which would cause the second conical surface to damage the pipeline and the mounting section 12.

[0052] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A medical tubing locking connector, characterized in that, It includes a connector body (1), a locking head (2), and a sleeve (3); The connector body (1) has a connecting section (11) at one end, and the connecting section (11) has a thread on its outer side; the connecting section (11) has an installation section (12) on its end face, and the outer wall of the installation section (12) is a first conical surface; the connector body (1) has a through hole (13) inside; the connector body (1) has two opposing side wings (14) in the middle section, and both side wings (14) extend outward. The locking head (2) has a threaded hole at one end and a mounting hole (21) at the other end. The sidewall of the mounting hole (21) is a second conical surface. The end face of the locking head (2) has a recessed hole (22). The sleeve (3) has two opposite slots (31) on its side wall and a protrusion (32) on its end face; During installation, the pipe is fitted onto the first conical surface, and the locking head (2) is installed on the connector body (1) through the threaded hole, so that the second conical surface fits against the outer wall of the pipe; both side wings (14) extend into a corresponding slot (31), and the end of the slot (31) near the locking head (2) fits against the side wing (14); the end face of the sleeve (3) fits against the locking head (2), and the protrusion (32) extends into the recess (22).

2. The medical tubing locking connector according to claim 1, characterized in that, The end face of the side wing (14) facing the connecting section (11) is configured as a first inclined surface.

3. The medical tubing locking connector according to claim 2, characterized in that, The sleeve (3) is provided with two opposite receiving shells (33), and the interior of the receiving shell (33) forms a slot (31), and each side wing (14) is provided in a corresponding receiving shell (33).

4. The medical tubing locking connector according to claim 3, characterized in that, The surface of the slot (31) that fits against the side wing (14) is set as a second inclined surface, and the slope of the second inclined surface is less than that of the first inclined surface, so that the contact point between the second inclined surface and the first inclined surface is located on the side of the side wing (14) away from the connector body (1).

5. The medical tubing locking connector according to claim 3, characterized in that, The receiving shell (33) has an opening at one end away from the connecting section (11), and a limiting boss is provided at the opening so that the width of the opening is less than the thickness of the side wing (14).

6. The medical tubing locking connector according to claim 1, characterized in that, The through hole (13) includes a constant diameter section (13a) and a tapered section; the constant diameter section (13a) has the same diameter at all points and is located within the first tapered surface; the diameter of the sidewall of the tapered section gradually decreases towards the first tapered surface.

7. The medical tubing locking connector according to claim 6, characterized in that, The tapered segment includes a first segment (13b) and a second segment (13c); the first segment (13b) is close to the equal diameter segment (13a) and one end extends to the end position of the side wing (14); the side wall taper of the first segment (13b) is greater than the side wall taper of the second segment (13c).

8. The medical tubing locking connector according to claim 1, characterized in that, Both sides of the protrusion (32) and both sides of the concave hole (22) are provided with ramps.

9. The medical tubing locking connector according to claim 1, characterized in that, The taper of the first conical surface is greater than the taper of the second conical surface.

10. The medical tubing locking connector according to claim 1, characterized in that, The locking head (2) has a stepped surface located between the threaded hole and the mounting hole (21) to abut the end of the connecting section (11).

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