Tissue spreader with locking mechanism

Abstract

This utility model belongs to the field of medical device technology, specifically relating to a tissue retractor with a locking structure, aiming to solve the problems of cleaning, disinfection, and ease of operation of medical surgical instruments. The retractor consists of a retracting component and a locking component, which are detachably hinged together, facilitating independent cleaning and disinfection after surgery, avoiding cleaning dead spots, and reducing the risk of postoperative infection. The retracting component includes two hinged retracting parts, enabling tissue retraction. The locking component's arm angle locking component can flexibly adjust and stably lock the retracting angle. Furthermore, the insertion shaft is rounded to reduce wear and facilitate assembly; the arm angle locking component is easily disassembled, the connecting bolt can also be disassembled separately, and the first limiting component has anti-slip textures. These designs extend the instrument's service life and improve operational convenience, providing a reliable guarantee for the smooth progress of surgery.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a tissue expander with a locking structure. Background Technology

[0002] In various surgical procedures, tissue retractors are crucial instruments for ensuring the smooth progress of surgery. Their main function is to effectively open up the tissue at the surgical site, providing the surgeon with a clear field of vision and sufficient space. However, traditional tissue retractors have significant design flaws. Their locking structure and retractor components are usually fixed by welding or riveting, forming a non-removable, integrated structure. Taking a common threaded knob locking retractor as an example, the connection area between the locking structure and the retractor contains many complex gaps and cavities. During surgery, tissue fluid, blood, and disinfectant can easily seep into these structures. Over time, the seepage gradually solidifies, forming a biofilm. Because the locking components cannot be disassembled, conventional rinsing and wiping methods are insufficient to reach these complex structures during postoperative cleaning, failing to thoroughly remove contaminants. Furthermore, during high-temperature and high-pressure sterilization, steam and disinfectants are also insufficient to fully cover these cleaning dead zones, significantly reducing the sterilization effect. Long-term use of such instruments can easily lead to the growth of drug-resistant bacteria, significantly increasing the risk of postoperative infection and posing a serious threat to patients' health. Therefore, developing a tissue expander that can effectively solve the aforementioned cleaning and disinfection problems has become an important issue that urgently needs to be addressed in the medical field.

[0003] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Utility Model Content

[0004] The present invention aims to provide a tissue retractor with a locking structure to overcome the cleaning and disinfection difficulties caused by the integrated design of the locking structure and the retractor components in traditional tissue retractors, thereby significantly reducing the risk of postoperative infection in patients and improving the safety and reliability of medical device use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tissue expander with a locking structure includes an expander assembly and a locking assembly, the expander assembly including two expanders that are hinged to each other;

[0007] The locking assembly includes a support arm and a support arm angle locking assembly. There are two support arms, which are hinged to each other through the support arm angle locking assembly. The ends of the two support arms away from the support arm angle locking assembly are detachably hinged to the force-applying parts of the two expansion members.

[0008] When the arm angle locking assembly unlocks the two arms, the two arms can rotate freely; when the arm angle locking assembly locks the two arms, the two arms cannot rotate freely.

[0009] Furthermore, both of the force-applying parts of the two supporting members are provided with insertion holes, and the axis of the insertion holes is parallel to the axis of the hinge shaft of the supporting member;

[0010] The arm angle locking assembly is used to drive the two arms to move closer and further apart in the direction of rotation axis. Each of the two arms has a pin at the end away from the arm angle locking assembly. The two pins are oriented opposite to each other. The pin of the upper arm is inserted into one of the pin holes from top to bottom, and the pin of the lower arm is inserted into the other pin hole from bottom to top.

[0011] Furthermore, the end of the insertion shaft away from the support arm is rounded.

[0012] Furthermore, the outrigger angle locking assembly includes an abutment ring, a connecting bolt, a first limiting member, and an elastic member. One end of the connecting bolt is connected to one of the outriggers, and the other end passes through the other outrigger and is threadedly connected to the first limiting member. There are two abutment rings, which are respectively located on opposite sides of the two outriggers. Each of the opposite sides of the two abutment rings is provided with a plurality of meshing teeth arranged in a ring-shaped radial array. When the two abutment rings abut against each other, the meshing teeth on both sides can mesh with each other. The elastic member is located between the two outriggers to push the two outriggers to opposite sides respectively.

[0013] Furthermore, the elastic element is located inside the two abutment rings.

[0014] Furthermore, the elastic element is defined as a helical spring, which is sleeved on the outside of the connecting bolt.

[0015] Furthermore, the end of the connecting bolt away from the first limiting member passes through the corresponding side of the support arm and is fixedly connected to the second limiting member. The side of the support arm near the second limiting member away from the other support arm is provided with a receiving groove for accommodating the second limiting member. When the second limiting member is inserted into the receiving groove, the receiving groove will restrict the second limiting member from rotating.

[0016] Furthermore, the radial cross-section of the receiving groove and the radial cross-section of the second limiting member are both regular hexagons.

[0017] Furthermore, the first limiting member is cylindrical in shape.

[0018] Furthermore, the peripheral surface of the first limiting member has anti-slip texture.

[0019] The tissue retractor of this invention has significant advantages. Its retracting and locking components are detachably hinged, which facilitates separate cleaning and disinfection after surgery, avoiding cleaning dead spots and the risk of postoperative infection. The hinged design of the retractor can achieve tissue retraction, and the arm angle locking component can flexibly control the retraction angle and maintain it stably. The rounded corner treatment of the insert shaft reduces wear, improves assembly convenience, and ensures safety. The arm angle locking component is easy to disassemble, and the connecting bolt can also be disassembled for cleaning. The anti-slip texture on the circumference of the first limiting component facilitates operation. The reasonable design of each component extends the service life of the instrument and comprehensively improves the convenience and safety of operation, providing strong support for the smooth performance of surgery. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of an embodiment of the tissue expander with a locking structure according to the present invention;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3 This is a schematic diagram of the structure of the opening component in one embodiment of the tissue opener with a locking structure according to this utility model;

[0024] Figure 4 This is a cross-sectional structural diagram of the locking component in one embodiment of the tissue expander with a locking structure according to the present invention.

[0025] Figure 5 This is a schematic diagram of the connection between the support arm and the connecting bolt in one embodiment of the tissue expander with locking structure of this utility model.

[0026] The meanings of the labels in the attached diagram are as follows:

[0027] The components include: a support assembly 1, a support member 11, a force-applying part 11a, a socket 111, a locking assembly 2, a support arm 21, a insertion shaft 211, a receiving groove 212, a support arm angle locking assembly 22, an abutment ring 221, a meshing tooth 2211, a connecting bolt 222, a second limiting member 2221, a first limiting member 223, an elastic member 224, and a coil spring 2241. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Reference Figures 1-5 As shown, the tissue expander in this embodiment includes an expanding component 1 and a locking component 2.

[0030] The spreading assembly 1 consists of two spreading members 11 that are hinged to each other. This hinged design allows the two spreading members 11 to rotate relative to each other, thereby smoothly realizing the spreading operation of the tissue.

[0031] The locking assembly 2 includes two support arms 21 and a support arm angle locking assembly 22. The two support arms 21 are hinged together by the support arm angle locking assembly 22. The ends of the two support arms 21 furthest from the support arm angle locking assembly 22 are detachably hinged to the force-applying portions 11a of the two spreading members 11. When the support arm angle locking assembly 22 unlocks the two support arms 21, the support arms 21 can rotate freely, allowing for flexible adjustment of the spreading angle of the spreader during surgery according to actual needs. When the support arm angle locking assembly 22 locks the two support arms 21, the support arms 21 cannot rotate freely, thus stably maintaining the current spreading angle.

[0032] By designing the support arm 21 of the locking component 2 and the opening member 11 of the opening component 1 as a detachable hinged connection, the tissue opener can be easily removed after surgery. This allows the opening component 1 and the locking component 2 to be handled independently during cleaning and disinfection, thus avoiding the problem of cleaning dead spots caused by the integrated structure.

[0033] In this embodiment, both supporting members 11 have insertion holes 111 on their force-applying portions 11a, and the axis of the insertion holes 111 is parallel to the hinge axis of the supporting member 11. This insertion hole 111 provides a stable structural basis for subsequent connection with the support arm 21. In this embodiment, the support arm angle locking assembly 22 can control the two support arms 21 to move closer and further apart along their hinge axis axial direction.

[0034] Two support arms 21 are provided with insertion shafts 211 at the ends away from the support arm angle locking assembly 22, and the two insertion shafts 211 are oriented towards each other. During actual assembly, the distance between the two arms 21 in the vertical direction is adjusted by the arm angle locking assembly 22, so that the two insert shafts 211 form a distance in the vertical direction to accommodate the two spreading members 11. Then, the two spreading members 11 are placed horizontally between the two insert shafts 211, and the two insert shafts 211 are aligned with the two insertion holes 111 respectively. Specifically, the upper insert shaft 211 is aligned above one insertion hole 111, and the other insert shaft 211 is aligned below the other insertion hole 111. Then, the distance between the two arms 21 in the vertical direction is reduced by the arm angle locking assembly 22, so that the insert shaft 211 on the upper arm 21 is inserted into one insertion hole 111 from top to bottom, and the insert shaft 211 on the lower arm 21 is inserted into the other insertion hole 111 from bottom to top. After such insertion, mutual limiting will be formed in the vertical direction, and the two arms 21 are respectively hinged to the two force-applying parts 11a.

[0035] When it is necessary to detach the locking component 2 from the spreading component 1, the distance between the two supporting arms 21 in the vertical direction is adjusted by using the arm angle locking component 22. This allows the two supporting arms 21 to drive the two insertion shafts 211 out of the two insertion holes 111 respectively, thus completing the detachment operation. After detachment, the spreading component 1 and the locking component 2 can be cleaned and disinfected separately to ensure the cleanliness of each component and effectively avoid the risk of postoperative infection due to inadequate cleaning.

[0036] In this embodiment, the end of the insert shaft 211 furthest from the support arm 21 is rounded. This design reduces wear on the inner wall of the socket 111 during insertion and removal of the insert shaft 211, extending the service life of the component and preventing accidental injury to medical personnel or patients during operation. Furthermore, the rounded end of the insert shaft 211 serves as a guide when inserted into the socket 111, improving assembly convenience.

[0037] In this embodiment, the outrigger angle locking assembly 22 includes an abutment ring 221, a connecting bolt 222, a first limiting member 223, and an elastic member 224. One end of the connecting bolt 222 is connected to one of the outriggers 21, and the other end passes through the other outrigger 21 and is threadedly connected to the first limiting member 223. This arrangement allows the two outriggers 21 to form a hinged connection. Notably, the first limiting member 223 can adjust its position axially on the connecting bolt 222 when it rotates on the connecting bolt 222. When the first limiting member 223 moves inward, it pushes the two outriggers 21 closer together. The elastic member 224 is located between the two outriggers 21 to push the two outriggers 21 to opposite sides. Thus, when the first limiting member 223 moves outward, the two outriggers 21 will move away from each other under the pushing action of the elastic member 224. In this way, the outrigger angle locking assembly 22 can control the two outriggers 21 to move closer and further apart axially along their hinge axis.

[0038] In this embodiment, there are two abutment rings 221, each located on one side of the two support arms 21. Each side of the two abutment rings 221 has a plurality of meshing teeth 2211 arranged in a circular radial array. When the two abutment rings 221 abut against each other, the meshing teeth 2211 on both sides can mesh with each other. When meshed, the two abutment rings 221 cannot rotate relative to each other, thus locking the angle of the two support arms 21. In this way, the two support arms 21 can restrict the rotation of the two opening members 11 relative to each other; the two support arms 21 are in a locked state in this state. Similarly, when the two abutment rings 221 are not abutting against each other, that is, when the meshing teeth 2211 on both sides are not meshing, the two support arms 21 can rotate freely relative to each other. Thus, the two opening members 11 can freely adjust their opening and closing; the two support arms 21 are in an unlocked state in this state.

[0039] The switching between the locked and unlocked states can be controlled by rotating the first limiting member 223. When the first limiting member 223 is rotated inward, it pulls the two support arms 21 closer together against the elastic force of the elastic member 224, thus causing the meshing teeth 2211 on both sides to engage. When the first limiting member 223 is rotated outward, it creates space for the two support arms 21 to move away from each other. During this process, the elastic member 224 pushes the two support arms 21 away from each other, thus causing the meshing teeth 2211 on both sides to move away from each other and disengage.

[0040] In this embodiment, the elastic element 224 is located inside the two abutment rings 221. This positioning effectively utilizes the pushing effect of the elastic element without affecting the normal engagement of the abutment rings 221. Furthermore, the elastic element 224 is defined as a helical spring 2241. Helical springs possess good elasticity and stability, meeting the performance requirements of the tissue retractor for elastic elements. The helical spring 2241 is also sleeved on the outside of the connecting bolt 222, thus guiding the direction of force applied by the helical spring 2241 and ensuring its stable function.

[0041] The arm angle locking assembly 22 proposed in this embodiment is also easy to disassemble. When disassembling, the first limiting member 223 is completely unscrewed from the connecting bolt 222. In this way, it can be disassembled into several parts, mainly the first limiting member 223, the coil spring 2241 and the two arms 21. This allows each part to be cleaned and disinfected separately, eliminating blind spots in cleaning and ensuring the hygiene and safety of the device.

[0042] The end of the connecting bolt 222 away from the first limiting member 223 passes through the corresponding side of the support arm 21 and is fixedly connected to the second limiting member 2221. A receiving groove 212 is provided on the side of the support arm 21 closest to the second limiting member 2221 that is opposite to the other support arm 21 to accommodate the second limiting member 2221. When the second limiting member 2221 is inserted into the receiving groove 212, the receiving groove 212 will restrict the rotation of the second limiting member 2221. This structural design allows for a detachable connection between the second limiting member 2221 and the support arm 21, enabling the connecting bolt 222 to be removed for separate cleaning, further improving the thoroughness of cleaning.

[0043] To better achieve the limiting function of the second limiting member 2221, the radial cross-section of both the receiving groove 212 and the second limiting member 2221 is designed as a regular hexagon. The regular hexagonal shape can provide multiple contact planes, effectively restricting the rotational freedom of the second limiting member 2221 and improving the limiting effect.

[0044] In this embodiment, the first limiting member 223 is cylindrical in shape. This shape facilitates threaded connection with the connecting bolt 222 and is also easy to operate. To facilitate tightening or loosening of the first limiting member 223 by medical personnel during operation, the peripheral surface of the first limiting member 223 is provided with anti-slip texture. The anti-slip texture increases friction, allowing medical personnel to operate the first limiting member 223 more easily and accurately.

[0045] In summary, this utility model discloses a tissue retractor with a locking structure. This tissue retractor features an ingenious structural design that greatly meets clinical use and cleaning needs. The detachable connection between the retractor and locking components allows for more efficient postoperative cleaning and disinfection, avoiding cleaning blind spots and reducing the risk of postoperative infection. The arm angle locking component allows for flexible adjustment and stable maintenance of the retractor angle. Furthermore, the rounded corner design of the insertion shaft, the easy disassembly of the components, and the targeted design of each part not only extend the instrument's service life but also greatly improve operational convenience, ensuring the safety of medical staff and patients. While improving the overall performance of surgical instruments, it provides strong support for the smooth conduct of medical procedures.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tissue spreader having a locking structure, characterized by: It includes a spreading component and a locking component, wherein the spreading component includes two spreading members that are hinged to each other; The locking assembly includes a support arm and a support arm angle locking assembly. There are two support arms, which are hinged to each other through the support arm angle locking assembly. The ends of the two support arms away from the support arm angle locking assembly are detachably hinged to the force-applying parts of the two expansion members. When the arm angle locking assembly unlocks the two arms, the two arms can rotate freely; when the arm angle locking assembly locks the two arms, the two arms cannot rotate freely.

2. The tissue spreader with a locking structure according to claim 1, characterized in that: Both of the force-applying parts of the two supporting members are provided with insertion holes, and the axis of the insertion holes is parallel to the axis of the hinge shaft of the supporting member; The arm angle locking assembly is used to drive the two arms to move closer and further apart in the direction of rotation axis. Each of the two arms has a pin at the end away from the arm angle locking assembly. The two pins are oriented opposite to each other. The pin of the upper arm is inserted into one of the pin holes from top to bottom, and the pin of the lower arm is inserted into the other pin hole from bottom to top.

3. The tissue spreader with a locking structure according to claim 2, characterized in that: The end of the insert shaft away from the support arm is rounded.

4. The tissue spreader with a locking structure according to claim 2, characterized in that: The outrigger angle locking assembly includes an abutment ring, a connecting bolt, a first limiting member, and an elastic member. One end of the connecting bolt is connected to one of the outriggers, and the other end passes through the other outrigger and is threadedly connected to the first limiting member. There are two abutment rings, which are respectively located on opposite sides of the two outriggers. Each of the opposite sides of the two abutment rings is provided with a plurality of meshing teeth arranged in a ring-shaped radial array. When the two abutment rings abut against each other, the meshing teeth on both sides can mesh with each other. The elastic member is located between the two outriggers to push the two outriggers to opposite sides respectively.

5. The tissue spreader with a locking structure according to claim 4, characterized in that: The elastic element is located inside the two abutment rings.

6. The tissue spreader with a locking structure according to claim 5, characterized in that: The elastic element is defined as a helical spring, which is sleeved on the outside of the connecting bolt.

7. The tissue spreader with a locking structure according to claim 4, characterized in that: The end of the connecting bolt away from the first limiting member passes through the corresponding side of the support arm and is fixed to the second limiting member. The side of the support arm near the second limiting member away from the other support arm is provided with a receiving groove to accommodate the second limiting member. When the second limiting member is inserted into the receiving groove, the receiving groove will restrict the second limiting member from rotating.

8. The tissue spreader with a locking structure according to claim 7, characterized in that: The radial cross-section of the receiving groove and the radial cross-section of the second limiting member are both regular hexagons.

9. The tissue spacer with a locking structure according to claim 4, characterized in that: The first limiting member is cylindrical in shape.

10. The tissue expander with a locking structure according to claim 9, characterized in that: The first limiting member has anti-slip texture on its peripheral surface.

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