A type of UT sleeve

Abstract

This utility model relates to a UT sleeve, belonging to the field of medical device technology, and solves the problems of easy T-sleeve detachment, easy loosening, accidental activation, and inconvenient unlocking of the connection between the U-sleeve and T-sleeve in the prior art. A UT sleeve includes a U-sleeve and a T-sleeve; the U-sleeve includes a base plate, a U-shaped end cap, and an outer tube body. The U-shaped end cap is located above the base plate, dividing the upper surface of the base plate into a U-shaped end cap area and a T-shaped placement cavity. The T-shaped placement cavity of the base plate has a central circular hole. The outer tube body is located at the central circular hole on the lower surface of the base plate. The U-shaped end cap includes a curved portion and a straight portion. The curved portion has a first limiting channel at its center, and a press-type spring retractable limiting component is installed within the first limiting channel. The T-sleeve includes a T-shaped end cap and an inner tube body. The T-shaped end cap has a central circular hole, and the inner tube body is located at the central circular hole on the lower surface of the T-shaped end cap. This design achieves safe and convenient operation of the UT sleeve.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a UT sleeve. Background Technology

[0002] The UT cannula is an essential external protective cannula and surgical access point for percutaneous endoscopic discectomy (PED). It consists of a U-cannula and a T-cannula, with the T-cannula secured to the U-cannula via a locking mechanism. Existing UT cannula locking mechanisms are mainly divided into manual locking (including push-button and valve types) and self-locking (spherical locking). These locking structures have several drawbacks, affecting the safety and efficiency of the surgical procedure: the locking mechanism is easily accidentally touched during operation, leading to unintended unlocking; the locking mechanism can easily open accidentally during operation, causing the T-cannula to dislodge and increasing surgical risks; after prolonged use, the locking mechanism can loosen, automatically unlocking and causing the T-cannula to dislodge, affecting surgical safety; and the locking mechanism design is not ideal, making it inconvenient to unlock and lock the T-cannula promptly, affecting the convenience of the surgical procedure.

[0003] These drawbacks not only affect the smoothness of the surgical procedure, but also bring unnecessary risks and hidden dangers to the surgical process. Utility Model Content

[0004] Based on the above analysis, this utility model aims to provide a UT sleeve to solve at least one of the following problems when using existing UT sleeves: the T sleeve is easy to come out, the locking buckle between the U sleeve and the T sleeve is easy to loosen, accidentally touch, and is inconvenient to unlock.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] A UT sleeve includes a U sleeve 1 and a T sleeve 2; the U sleeve 1 includes a substrate 101, a U-shaped end cap 102 and an outer tube body 103, the U-shaped end cap 102 is located above the substrate 101 and divides the upper surface of the substrate 101 into a U-shaped end cap area and a T-shaped placement cavity, the T-shaped placement cavity of the substrate has a circular hole in the center, and the outer tube body 103 is disposed at the circular hole in the center of the lower surface of the substrate 101;

[0007] The U-shaped end cap 102 includes a curved part and a straight part. The curved part has a first limiting channel at its center, and a press-type spring telescopic limiting component 3 is provided in the first limiting channel.

[0008] The T-sleeve 2 includes a T-shaped end cap 201 and an inner tube 202. The T-shaped end cap 201 has a circular hole in the center, and the inner tube 202 is located at the circular hole in the center of the lower surface of the T-shaped end cap 201.

[0009] Specifically, the base plate 101, U-shaped end cap 102 and outer tube body 103 of the U-sleeve 1 are integrally formed; the T-shaped end cap 201 and inner tube body 202 of the T-sleeve 2 are integrally formed.

[0010] Furthermore, the dimensions of the T-shaped end cap 201 match the dimensions of the T-shaped placement cavity, and the positions of their central circular holes are the same; the outer diameter of the inner tube 202 is smaller than the inner diameter of the outer tube 103, and the inner tube 202 is inserted into the outer tube 103.

[0011] Preferably, the first limiting channel of the U-shaped end cap bending portion has a positioning groove 401 on the U-shaped opening side; the T-shaped end cap 201 includes a main body vertical section and a flange, and the main body vertical section of the T-shaped end cap is provided with a positioning boss 402, the size of which matches the positioning groove 401.

[0012] Specifically, the main body vertical section positioning boss 402 is provided with a second limiting channel. When the T-shaped end cap is placed into the T-shaped placement cavity, the first limiting channel and the second limiting channel are coaxial.

[0013] Furthermore, the press-type spring telescopic limiting assembly 3 includes a pressure rod 303, a locking part 302, and a limiting post 301 that abut against each other in sequence; the end of the pressure rod 303 that contacts the locking part 302 is provided with a lower tooth 3021; ​​the end of the locking part 302 that contacts the pressure rod 303 is provided with an upper tooth 3031, and the upper tooth and the lower tooth mesh with each other.

[0014] For example, the inner wall of the first limiting channel is provided with a guide portion 304 and a second spring limiting portion 3042, the second spring limiting portion 3042 is provided on the side of the first limiting channel near the U-shaped opening; the edge of the guide portion 304 is provided with an annular pressure rod limiting portion 3041, the pressure rod limiting portion 3041 is located on the edge of the U-shaped curved side of the first limiting channel.

[0015] Preferably, the size and shape of the guide portion 304 are matched with the shape and size of the upper tooth portion 3031 and the lower tooth portion 3021, forming a sliding channel for the upper tooth portion and the lower tooth portion.

[0016] Furthermore, a first spring limiting part 3011 is provided on the periphery of the end of the limiting post 301 that contacts the locking part 302.

[0017] It should be noted that the press-type spring telescopic limiting assembly 3 also includes a spring 305, which is disposed between the first spring limiting part 3011 and the second spring limiting part 3042.

[0018] Preferably, the locking part 302 is provided with a locking part base 3022 on the side that contacts the limiting post 301, and the diameter is larger than the diameter of the limiting post 301.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] 1. This utility model uses a press-type spring telescopic limiting component to lock and unlock the U-tube and T-tube. Locking and unlocking can be achieved with a simple pressing action, which is convenient and simple to operate. It can more firmly fix the T-tube, so that the T-tube will not easily fall out and avoid surgical risks.

[0021] 2. The pressing area of ​​the pressure rod of this utility model is designed as a concave arc shape. When the press-type spring telescopic limiting component is in the locked state, the arc surface of the pressing area of ​​the pressure rod is slightly lower than the surface of the curved part of the U-shaped end cap, which effectively prevents the device from being accidentally unlocked due to accidental contact during the operation and avoids the T-tube from falling out. At the same time, the arc design of the surface of the pressing area of ​​the pressure rod fits the fingertip and will not cause pressing difficulties due to slight indentation, which improves the stability of the UT tube and the convenience of operation, and ensures the safety and efficiency of the operation.

[0022] 3. This utility model forms a double locking mechanism through the synergistic effect of the positioning boss, positioning groove and press-type spring telescopic limiting component, which enhances the stability and safety of the connection, ensures reliability under various usage conditions, improves the accuracy and reliability of assembly, and reduces errors and adjustment time during the installation process.

[0023] 4. The press-type spring telescopic limiting component of this utility model is located in front of the U-sleeve. This position will not be easily touched and is also a marking point, making it easier for the operator to identify the position.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 This is a perspective view of the U-sleeve and T-sleeve of this utility model in their unassembled state;

[0027] Figure 2 This is a perspective view of the U-sleeve and T-sleeve of this utility model in their assembled and locked state;

[0028] Figure 3 This is a front view of the U-sleeve and T-sleeve of this utility model in their assembled and locked state;

[0029] Figure 4This utility model Figure 3 Sectional view along line AA;

[0030] Figure 5 This utility model Figure 4 Enlarged view of a section at point D;

[0031] Figure 6 This is an exploded view of the pressing part of the retractable limiting component of the pressing spring of this utility model;

[0032] Figure 7 This utility model Figure 1 View from direction B;

[0033] Figure 8 This utility model Figure 7 C-axis sectional view;

[0034] Figure 9 This is a perspective view of the guide portion of the push-type spring telescopic limiting component of this utility model.

[0035] Figure label:

[0036] 1-U-sleeve; 101-substrate; 102-U-shaped end cap; 103-outer tube body; 2-T-sleeve; 201-T-shaped end cap; 202-inner tube body; 3-press-type spring telescopic limiting assembly; 301-limiting post; 302-locking part; 303-pressure rod; 304-guide part; 305-spring; 3011-first spring limiting part; 3021-lower tooth part; 3022-locking part base; 3031-upper tooth part; 3041-pressure rod limiting part; 3042-second spring limiting part; 401-positioning groove; 402-positioning boss. Detailed Implementation

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0038] A specific embodiment of this utility model discloses a UT sleeve, such as... Figure 1 , Figure 2 As shown, it includes a U-shaped sleeve 1 and a T-shaped sleeve 2; the U-shaped sleeve 1 includes a substrate 101, a U-shaped end cap 102 and an outer tube 103. The U-shaped end cap 102 is located above the substrate 101 and divides the upper surface of the substrate 101 into a U-shaped end cap area and a T-shaped placement cavity. The T-shaped placement cavity of the substrate has a circular hole in the center. The outer tube 103 is located at the circular hole in the center of the lower surface of the substrate 101.

[0039] The U-shaped end cap 102 includes a curved part and a straight part. The curved part has a first limiting channel at its center, and a press-type spring telescopic limiting component 3 is provided in the first limiting channel.

[0040] The T-sleeve 2 includes a T-shaped end cap 201 and an inner tube 202. The T-shaped end cap 201 has a circular hole in the center, and the inner tube 202 is located at the circular hole in the center of the lower surface of the T-shaped end cap 201.

[0041] Preferably, the base plate 101, U-shaped end cap 102 and outer tube body 103 of the U-sleeve 1 are integrally formed; the T-shaped end cap 201 and inner tube body 202 of the T-sleeve 2 are integrally formed.

[0042] Specifically, the dimensions of the T-shaped end cap 201 match the dimensions of the T-shaped placement cavity, and the positions of their central circular holes are the same; the outer diameter of the inner tube 202 is smaller than the inner diameter of the outer tube 103, and the inner tube 202 is inserted into the outer tube 103.

[0043] Preferably, the first limiting channel of the U-shaped end cap bending portion has a positioning groove 401 on the U-shaped opening side; the T-shaped end cap 201 includes a main body vertical section and a flange, and the main body vertical section of the T-shaped end cap is provided with a positioning boss 402, the size of which matches the positioning groove 401.

[0044] After the U-sleeve and T-sleeve are assembled, the positioning boss and positioning groove can put the U-sleeve and T-sleeve in a preliminary locking state. On the one hand, it aligns the first limiting channel and the second limiting channel, which facilitates the extension and retraction operation of the press-type spring telescopic limiting component 3. On the other hand, it works in conjunction with the press-type spring telescopic limiting component to form a double locking mechanism, which improves the accuracy and reliability of the assembly and reduces errors and adjustment time during the installation process.

[0045] It should be noted that the main body vertical section positioning boss 402 is provided with a second limiting channel. When the T-shaped end cap is placed into the T-shaped placement cavity, the first limiting channel and the second limiting channel are coaxial.

[0046] Furthermore, such as Figure 3 , 4 As shown in Figures 5 and 6, the press-type spring telescopic limiting assembly 3 includes a pressure rod 303, a locking part 302, and a limiting post 301 that abut against each other in sequence; the end of the pressure rod 303 that contacts the locking part 302 is provided with a lower tooth 3021; ​​the end of the locking part 302 that contacts the pressure rod 303 is provided with an upper tooth 3031, and the upper tooth and the lower tooth mesh with each other.

[0047] After the U-tube and T-tube are assembled and the positioning boss and positioning groove put the U-tube and T-tube in a preliminary locked state, press the pressure rod to move the limiting post from the first limiting channel into the second limiting channel to achieve the locking of the U-tube and T-tube.

[0048] Preferably, the pressing area of ​​the pressure rod 303 is designed as a concave arc shape. When the limiting post pops out and enters the second limiting channel, the edge of the pressing area of ​​the pressure rod is flush with the surface of the curved part of the U-shaped end cap, and the arc surface is slightly lower than the surface of the curved part of the U-shaped end cap, which effectively prevents the device from being accidentally unlocked due to accidental contact during the surgical operation.

[0049] Furthermore, the inner wall of the first limiting channel is provided with a guide portion 304 and a second spring limiting portion 3042, the second spring limiting portion 3042 being located on the side of the first limiting channel near the U-shaped opening; the edge of the guide portion 304 is provided with an annular pressure rod limiting portion 3041, the pressure rod limiting portion 3041 being located on the edge of the U-shaped bend side of the first limiting channel, ensuring that the pressure rod and other components of the press-type spring telescopic limiting assembly will not come out from the U-shaped bend side during the sliding movement.

[0050] Preferably, such as Figure 7 , 8 As shown in Figures 9 and 1, the size and shape of the guide portion 304 are matched with the shape and size of the upper tooth portion 3031 and the lower tooth portion 3021, forming a sliding channel for the upper tooth portion and the lower tooth portion.

[0051] Furthermore, a first spring limiting part 3011 is provided on the periphery of the end of the limiting post 301 that contacts the locking part 302.

[0052] It should be noted that the press-type spring telescopic limiting assembly 3 also includes a spring 305, disposed between the first spring limiting part 3011 and the second spring limiting part 3042. This ensures that the components of the press-type spring telescopic limiting assembly will not disengage from the U-shaped opening side during sliding movement.

[0053] Preferably, the locking part 302 is provided with a locking part base 3022 on the side that contacts the limiting post 301, and the diameter is larger than the diameter of the limiting post 301 to prevent the locking part and the limiting post from misaligning during the movement.

[0054] When using the UT sleeve of this utility model: After the U sleeve 1 is fixed, insert the inner tube 202 of the T sleeve 2 into the outer tube 103 of the U sleeve, adjust the positioning boss 402 and the positioning groove 401 to align, ensure that the T-shaped end cap 201 of the T sleeve is embedded in the T-shaped placement cavity of the U sleeve, and achieve the initial locking of the U sleeve and the T sleeve; press the pressure rod 303 of the press-type spring telescopic limiting component 3, the lower tooth 3021 of the pressure rod pushes the upper tooth 3031 of the locking member to slide along the guide part 304, under the action of the spring 305, the teeth of the upper tooth 3031 of the locking member slide along the inclined surface of the teeth of the meshing lower tooth 3021 of the pressure rod, under the action of the inclined surface, the upper tooth of the locking member rotates through an angle and slides to the other side of the inclined surface, the limiting post 301 pops out, and partly enters the second limiting channel, thereby fixing the U sleeve and the T sleeve;

[0055] After the surgery is completed, press the lever of the press-type spring retractable limiting component 3 again to make the limiting post 301 fully retract into the first limiting channel, release the lock between the two, and remove the T-tube from the U-tube.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A UT sleeve, characterized in that, It includes a U-shaped sleeve (1) and a T-shaped sleeve (2); the U-shaped sleeve (1) includes a base plate (101), a U-shaped end cap (102) and an outer tube (103). The U-shaped end cap (102) is located above the base plate (101) and divides the upper surface of the base plate (101) into a U-shaped end cap area and a T-shaped placement cavity. The T-shaped placement cavity of the base plate has a circular hole in the center. The outer tube (103) is located at the circular hole in the center of the lower surface of the base plate (101). The U-shaped end cap (102) includes a curved part and a straight part. The curved part has a first limiting channel at its center. The first limiting channel is provided with a press-type spring telescopic limiting component (3). The T-sleeve (2) includes a T-shaped end cap (201) and an inner tube (202). The T-shaped end cap (201) has a central hole, and the inner tube (202) is located at the central hole on the lower surface of the T-shaped end cap (201).

2. The sleeve according to claim 1, characterized in that, The base plate (101), U-shaped end cap (102) and outer tube body (103) of the U-sleeve (1) are integrally formed; the T-shaped end cap (201) and inner tube body (202) of the T-sleeve (2) are integrally formed.

3. The sleeve according to claim 1, characterized in that, The dimensions of the T-shaped end cap (201) match the dimensions of the T-shaped placement cavity, and the positions of their central circular holes are the same; the outer diameter of the inner tube (202) is smaller than the inner diameter of the outer tube (103), and the inner tube (202) is inserted into the outer tube (103).

4. The sleeve according to claim 1, characterized in that, The first limiting channel of the U-shaped end cap bending part has a positioning groove (401) on the U-shaped opening side; the T-shaped end cap (201) includes a main body vertical section and a flange, and the main body vertical section of the T-shaped end cap is provided with a positioning boss (402) with a size matching the positioning groove (401).

5. The sleeve according to claim 4, characterized in that, The main body vertical section positioning boss (402) is provided with a second limiting channel. When the T-shaped end cap is placed into the T-shaped placement cavity, the first limiting channel and the second limiting channel are coaxial.

6. The sleeve according to claim 1, characterized in that, The press-type spring telescopic limiting assembly (3) includes a pressure rod (303), a locking part (302), and a limiting post (301) that abut against each other in sequence; the end of the pressure rod (303) that contacts the locking part (302) is provided with a lower tooth (3021); the end of the locking part (302) that contacts the pressure rod (303) is provided with an upper tooth (3031), and the upper tooth and the lower tooth mesh with each other.

7. The sleeve according to claim 4, characterized in that, The inner wall of the first limiting channel is provided with a guide part (304) and a second spring limiting part (3042). The second spring limiting part (3042) is located on the side of the first limiting channel near the U-shaped opening. The edge of the guide part (304) is provided with an annular pressure rod limiting part (3041). The pressure rod limiting part (3041) is located on the edge of the U-shaped bend side of the first limiting channel.

8. The sleeve according to claim 7, characterized in that, The size and shape of the guide part (304) are matched with the shape and size of the upper tooth part (3031) and the lower tooth part (3021) to form a sliding channel for the upper tooth part and the lower tooth part.

9. The sleeve according to claim 6, characterized in that, The limiting post (301) is provided with a first spring limiting part (3011) on the periphery of the end that contacts the locking part (302); The press-type spring telescopic limiting assembly (3) also includes a spring (305) disposed between the first spring limiting part (3011) and the second spring limiting part (3042).

10. The sleeve according to claim 6, characterized in that, The locking part (302) is provided with a locking part base (3022) on the side that contacts the limiting post (301), and the diameter is larger than the diameter of the limiting post (301).

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