Locking mechanism and surgical instrument

Abstract

The utility model provides a locking mechanism and surgical instrument.The locking mechanism comprises a driving assembly and a locking piece, the driving assembly comprises a driving shaft and at least one shifting button, the locking piece is hinged to a base, the driving shaft is movably arranged in the base and can rotate around the axis of the driving shaft, the driving shaft is provided with a matching part, and the matching part is in contact fit with the locking piece; and the driving shaft can drive the locking piece to rotate to the unlocking position when the driving shaft rotates to the releasing position and can drive the locking piece to rotate to the locking position when the driving shaft rotates to the locking position, at least one end of the driving shaft is provided with a shifting button, and the shifting button can drive the driving shaft to rotate. According to the locking mechanism provided by the utility model, the shifting structure design of the shifting button and the driving shaft is adopted, so that the actions required to be completed for switching the locking state and the releasing state are simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical instrument technical field, specifically, relate to a locking mechanism and a surgical instrument comprising the locking mechanism. BACKGROUND

[0002] The minimally invasive surgical instrument usually comprises a handle structure, a plurality of connecting rods and an execution end usually in the form of a forceps or a tweezer, the connecting rods being connected between the handle structure and the execution end, and the connecting rods being connected to the precise components in the handle structure respectively to control the execution end to complete complex movements by the extension and rotation of the connecting rods.

[0003] To realize the rotation, deflection and opening and closing of the forceps head simultaneously, the handle part of the surgical instrument is usually defined as the thumb and the index finger being responsible for controlling the components above the handle, and the remaining three fingers complexly gripping the handle and holding or releasing the grip handle on the handle, the grip handle and the connecting rods controlling the opening and closing of the forceps head, and the locking mechanism above the grip handle selectively locking the position of the grip handle to keep the forceps head at a suitable opening and closing angle.

[0004] However, the existing locking mechanism usually adopts a knob design, and when the grip handle needs to be locked or unlocked, the knob needs to be rubbed by the index finger or the thumb to rotate a large enough angle to unlock or lock the grip handle, which not only makes the operation of the surgical instrument complex and affects the surgical efficiency, but also makes it difficult for the operator to judge whether the locking mechanism has locked or unlocked the grip handle, and the stability is poor.

[0005] Therefore, how to provide a locking mechanism which is convenient to operate and has high stability has become a technical problem to be solved in the field. SUMMARY

[0006] The utility model aims at solving one of the technical problems in the related art to some extent, and for this purpose, the utility model provides a locking mechanism and a surgical instrument comprising the locking mechanism, which is convenient to operate and has high stability.

[0007] To achieve the above-mentioned purpose, as one aspect of the utility model, a locking mechanism is provided, which comprises a driving assembly and a locking piece, the driving assembly comprising a driving shaft and at least one knob, the locking piece being hinged to the base, the driving shaft being movably arranged in the base and being capable of rotating around its own axis, the driving shaft having a matching part thereon, the matching part being in contact with the locking piece, and being capable of rotating the locking piece to an unlocking position when the driving shaft rotates to a release position, and rotating the locking piece to a locking position when the driving shaft rotates to a locking position, at least one end of the driving shaft being provided with the knob, the knob being capable of rotating the driving shaft.

[0008] Optionally, the locking member has intersecting first and second mating surfaces. When the mating part rotates from the first mating surface to the second mating surface, or from the second mating surface to the first mating surface, a prompting sound is generated.

[0009] Optionally, the locking member includes a locking strip and a contact block. The first end of the locking strip is fixedly connected to the contact block and hinged to the base. A plurality of first contact teeth are formed on the side of the second end of the locking strip. The first mating surface and the second mating surface are disposed on the contact block. The locking mechanism further includes a reset elastic element, which is connected between the locking strip and the base.

[0010] Optionally, the first mating surface is a receiving groove, and the second mating surface is a contact plane. The contact plane is located on the side of the receiving groove opposite to the hinge axis between the locking member and the base. When the mating part is in the locked position, it mates with the receiving groove, and when the mating part is in the released position, it mates with the contact plane.

[0011] Alternatively, the first mating surface is a plane, and the second mating surface is an inclined plane, with the plane located on the side of the inclined plane away from the hinge axis between the locking member and the base; when the mating part is in the locked position, it engages with the inclined plane, and when the mating part is in the released position, it engages with the plane.

[0012] Optionally, the spring-loaded assembly further includes a receiving shell fixedly connected to the base, the drive shaft being sleeved inside the receiving shell and rotating about its own axis relative to the receiving shell.

[0013] Optionally, the locking mechanism further includes a spring-loaded assembly, which includes a spring block and is capable of driving the spring block to move toward the axis of the drive shaft by elastic force; the drive shaft also has a spring-loaded contact portion, which abuts against the spring block and is capable of pressing the spring block when the drive shaft rotates between the release position and the locking position.

[0014] Optionally, the spring-loaded assembly further includes a receiving shell and an elastic element. The receiving shell is fixedly connected to the base. The elastic element and the spring block are both disposed in the receiving shell. The elastic element can drive the spring block to move toward the drive shaft through elastic force so that the spring block remains in contact with the spring-loaded contact portion.

[0015] Optionally, the receiving shell includes a guide shell and a hinged cylinder. The elastic element and the spring block are both disposed in the guide shell. The elastic element is disposed between the inner wall of the first end of the guide shell and the opening of the second end of the guide shell, and can drive the spring block to move toward the opening of the guide shell by elastic force. The hinged cylinder is connected to the second end of the guide shell and is sleeved on the drive shaft. A communicating opening is formed on the side wall of the hinged cylinder facing the guide shell, and the elastic contact part passes through the communicating opening and enters the guide shell.

[0016] Optionally, a cut-off opening is formed on the side wall of the hinged cylinder opposite to the guide housing, and the axial position of the cut-off opening corresponds to the axial position of the connecting opening.

[0017] Optionally, the spring block has a first cylindrical contact surface on the side facing the drive shaft, and the spring-loaded contact portion has a second cylindrical contact surface on the side facing the first end of the guide housing. The axis of the first cylindrical contact surface and the axis of the second cylindrical contact surface both extend in the same direction as the axis of the drive shaft, and the first cylindrical contact surface and the second cylindrical contact surface are in contact with each other.

[0018] Optionally, guide grooves are formed on opposite side walls of the guide housing. One end of the guide groove communicates with the opening at the second end of the guide housing, and the other end of the guide groove extends toward the first end of the guide housing. The spring block has a pair of guide protrusions, which are accommodated in the guide grooves of the guide housing.

[0019] Optionally, the drive shaft includes a rotating shaft and a cam shaft. The rotating shaft includes a shaft rod and a first positioning plate disposed on the shaft rod. The cam shaft includes a bushing and a second positioning plate. The spring-loaded contact portion, the mating portion, and the second positioning plate are all disposed on the bushing, and the second positioning plate is located between the spring-loaded contact portion and the mating portion. One end of the bushing near the spring-loaded contact portion is disposed in the receiving shell, and one end of the shaft rod passes through the bushing.

[0020] Optionally, the drive shaft further includes a positioning pin, and the bushing has a positioning through hole that extends radially through the side wall of the bushing, the positioning pin passing through the positioning through hole and being fixedly connected to the shaft.

[0021] Optionally, the shaft has a threaded hole, and the locating pin is a screw.

[0022] As a second aspect of this utility model, a surgical instrument is provided, including a handle housing and a gripping handle, wherein the gripping handle is movably connected to the handle housing, and a connecting rod and a driving rod are both connected between the handle housing and the clamping device. The gripping handle is used to operate the opening and closing of the surgical instrument forceps assembly. The surgical instrument also includes a locking mechanism provided in the embodiments of this utility model, wherein the base is disposed on the handle housing, the toggle button is located outside the handle housing, and the locking member can engage with the gripping handle when rotated to the locked position to lock the position of the gripping handle.

[0023] In the locking mechanism and surgical instrument provided by this utility model, the locking member and the drive shaft can rotate around their respective axes, and the mating part on the drive shaft can press against the surface of the locking member during rotation and drive the locking member to rotate to different positions.

[0024] The end of the drive shaft is equipped with a knob. When the knob is turned to drive the drive shaft to the locked position, the mating part can drive the locking part to rotate to the locked position, so that the locking part contacts the gripper handle and locks the position of the gripper handle, thereby fixing the feed amount of the gripper handle and keeping the actuator of the surgical instrument in the current corresponding action.

[0025] When the toggle switch is turned to rotate the drive shaft to the release position, the mating part pushes the locking member to the unlock position, causing the locking member to leave the grip handle and allowing the grip handle to move freely. This allows the operator to change the action of the surgical instrument's execution end. This utility model adopts a toggle switch and drive shaft toggle structure design. Compared with the existing technology that uses rollers and other structures to lock the handle angle, the action required to switch between the locked and released states is simpler. Moreover, the rotation angle of the external toggle switch makes it easier for the operator to perceive and observe its locked and unlocked states, which helps to improve the stability of surgical operations.

[0026] Furthermore, the locking mechanism also includes a spring-loaded assembly. The spring-loaded assembly drives the spring block to maintain contact with the spring-loaded contact part on the drive shaft through elastic force. During the process of the drive shaft rotating to the release position or the locking position, the spring block will be pressed down. Thus, after the drive shaft rotates to the release position or the locking position, the spring block can press the spring-loaded contact part to keep it in its current rotation position, automatically keeping the drive shaft in the release position or the locking position. This achieves automatic holding of the locking component in the locked position and the unlocked position, further improving the stability of the surgical operation. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the locking mechanism in the released state according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of the locking mechanism in the released state according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the locking mechanism in the locked state according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the internal structure of the locking mechanism in the locked state according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the locking mechanism in the released state according to another embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the internal structure of the locking mechanism in the released state according to another embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the locking mechanism in the locked state according to another embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the internal structure of the locking mechanism in the locked state according to another embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the disassembly structure of the spring-loaded component in the locking mechanism provided in this embodiment of the utility model;

[0037] Figure 10 This is a schematic diagram of the drive shaft structure in the locking mechanism provided in this embodiment of the utility model;

[0038] Figure 11 This is a schematic diagram of the disassembled structure of the drive shaft in the locking mechanism provided in this embodiment of the utility model;

[0039] Figure 12 This is a schematic diagram of the structure of the surgical instrument provided in this embodiment of the utility model;

[0040] Figure 13 This is a schematic diagram of the structure of the surgical instrument provided in this embodiment of the utility model;

[0041] Figure 14 This is a schematic diagram of the back structure of the surgical instrument provided in this embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of the structure of the surgical instrument provided in this embodiment of the present invention after the removal of the dial;

[0043] Figure 16This is a partial structural diagram of the surgical instrument provided in this embodiment of the present invention after removing the single-sided shell.

[0044] Figure 17 This is a schematic diagram of the internal structure of the surgical instrument provided in this embodiment of the present invention with the locking mechanism in the released state and the gripping handle in the open state;

[0045] Figure 18 This is a schematic diagram of the internal structure of the surgical instrument provided in this embodiment of the present invention with the locking mechanism in the released state and the gripping handle in the pinched state;

[0046] Figure 19 This is a schematic diagram of the internal structure of the surgical instrument provided in this embodiment of the present invention, with the locking mechanism in the locked state and the gripping handle in the pinched state.

[0047] Explanation of reference numerals in the attached figures:

[0048] Drive shaft 100; spring-loaded contact part 101; mating part 102; rotating shaft 110; shaft rod 111; first positioning plate 112; convex shaft 120; bushing 121; positioning through hole 121a; second positioning plate 122; positioning pin 130; spring-loaded assembly 200; spring block 210; guide protrusion 211; receiving shell 220; guide shell 221; guide groove 221a; mounting port 221b; hinge cylinder 222; sealing plate 223; fixing ear 224; elastic element 230; locking element 300; locking strip 310; first contact tooth 311; contact block 320; hinge through hole 121a; second positioning plate 122; positioning pin 130; spring-loaded assembly 200; spring block 210; guide protrusion 211; receiving shell 220; guide shell 221; guide groove 221a; mounting port 221b; hinge cylinder 222; sealing plate 223; fixing ear 224; elastic element 230; locking element 300; locking bar 310; first contact tooth 311; contact block 320; hinge through hole 121a; second positioning plate 121a; second positioning plate 122; third positioning plate 121a; fourth positioning plate 121a; fifth positioning plate 121a; sixth positioning plate 121a; fifth positioning plate 121a; sixth positioning plate 121a; seventh positioning plate 121a; fifth positioning plate 121a; sixth positioning plate 121a; seventh positioning plate 121a; sixth positioning plate 121a; seventh positioning plate 121a; eighth positioning plate 121a; ninth positioning plate 121a; tenon 221a; tenon 221a; tenon 22 Hole 321; Positioning protrusion 330; Receiving groove a; Contact plane b; Toggle button 400; Reset elastic element 500; Handle housing 10; Adjustment housing 11; Transition housing 12; Tiger's mouth groove 12a; Movable groove 12b; Hinge protrusion 12c; Grip housing 13; Grip handle 20; Second contact tooth 20a; Handle part 21; Drive connection part 22; Handle hinge part 23; Insert tooth 24; Push assembly 30; Hinge rod 31; Hinge seat 32; Connecting rod 41; Drive rod 42; Rotation assembly 60; Oscillating assembly 70; First cylindrical contact surface m1; Second cylindrical contact surface m2. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0050] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0051] To solve the above-mentioned technical problems, as one aspect of this utility model, a locking mechanism is provided, connected to a base (not shown in the figure), such as... Figures 1 to 8 As shown, the locking mechanism includes a drive assembly and a locking member 300. The drive assembly includes a drive shaft 100 and at least one toggle switch 400. The locking member 300 is hinged to the base. The drive shaft 100 is movably disposed in the base and can rotate about its own axis. The drive shaft 100 has a mating part 102, which contacts and engages with the locking member 300. When the drive shaft 100 rotates to the release position, it can drive the locking member 300 to rotate to the unlocked position (e.g., ...). Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown), and when the drive shaft 100 rotates to the locking position, it drives the locking member 300 to rotate to the locked position (as shown). Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown, at least one end of the drive shaft 100 is provided with a knob 400, which can drive the drive shaft 100 to rotate.

[0052] It is understandable that, such as Figures 12 to 19 As shown, the locking mechanism provided by this utility model is applied to surgical instruments. The locking member 300 is used to contact the grip handle 20 of the surgical instrument in the locked position (e.g., Figure 19 As shown), to lock the position of the grip handle 20, the base is used to fix it on the surgical instrument (or as shown) Figures 12 to 19 As shown, the base and the handle housing 10 of the surgical instrument are integrated, and the knob 400 is used for finger operation.

[0053] In the locking mechanism provided by this utility model, the locking member 300 and the drive shaft 100 can rotate around their respective axes, and the mating part 102 on the drive shaft 100 can press against the surface of the locking member 300 during rotation and drive the locking member 300 to rotate to different positions; the end of the drive shaft 100 is provided with a knob 400. When the knob 400 is turned to drive the drive shaft 100 to rotate to the locking position, the mating part 102 can drive the locking member 300 to rotate to the locked position, so that the locking member 300 contacts the gripping handle 20 and locks the position of the gripping handle 20, thereby fixing the feed amount of the gripping handle 20 and keeping the execution end of the surgical instrument in the current corresponding action (e.g., the opening and closing angle of the forceps head).

[0054] When the toggle switch 400 rotates the drive shaft 100 to the release position, the mating part 102 pushes the locking member 300 to the unlock position, causing the locking member 300 to leave the grip handle 20, allowing the grip handle 20 to move freely. This allows the operator to change the action of the surgical instrument's execution end (e.g., control the free opening and closing of the forceps head). This utility model adopts a toggle switch 400 and drive shaft 100 toggle structure design. Compared with the existing technology that uses rollers or other structures to lock the handle angle, the action required to switch between the locked and released states is simpler. Moreover, the rotation angle of the external toggle switch 400 makes it easier for the operator to perceive and observe its locked and unlocked states, which helps to improve the stability of surgical operations.

[0055] As a preferred embodiment of this utility model, such as Figures 1 to 8 As shown, intersecting first mating surfaces (e.g.) are formed on the locking member 300. Figures 1 to 4 The receiving tank a in the middle Figures 5 to 8 plane c) and the second mating surface (e.g.) Figures 1 to 4 Contact plane b in Figures 5 to 8 When the inclined surface d) of the mating part 102 rotates from the first mating surface to the second mating surface, or from the second mating surface to the first mating surface, a prompt sound is generated.

[0056] In this embodiment of the invention, the locking member 300 has an intersecting first mating surface and a second mating surface. When the mating part 102 slides from a state of contact with one of them to contact with the other, a height difference will be generated at the intersection of the two mating surfaces, causing the mating part 102 to collide with the locking member 300 and make a crisp "click" sound. This makes it easier for the operator to judge whether the lock is in place, facilitates blind operation by the doctor, and further ensures the efficiency and stability of the surgical operation.

[0057] As a preferred embodiment of this utility model, such as Figures 1 to 8 As shown, the locking member 300 includes a locking bar 310 and a contact block 320. The first end of the locking bar 310 is fixedly connected to the contact block 320 and hinged to the base. The side of the second end of the locking bar 310 has a plurality of first contact teeth 311. The first mating surface and the second mating surface are disposed on the contact block 320.

[0058] The locking mechanism also includes a reset elastic element 500, which is connected between the locking element 300 and the base.

[0059] In this embodiment of the utility model, the locking mechanism further includes a reset elastic element 500. When the mating part 102 enters the receiving groove a, the reset elastic element 500 can automatically keep the locking element 300 in the locked position by its own elastic force, thereby ensuring that the locking element 300 is stably abutting against the grip handle 20 in the locked position, and thus ensuring the positional stability of the grip handle 20 in the locked state.

[0060] Optionally, such as Figures 1 to 8 As shown, the hinge axis between the locking member 300 and the base is set in the same direction as the axis of the drive shaft 100.

[0061] Understandably, the grip handle 20 at the surgical instrument handle is provided with a corresponding second contact tooth 20a (e.g., Figures 17 to 19 As shown, when the locking bar 310 rotates to the locking position close to the handle, the first contact tooth 311 and the second contact tooth 20a engage with each other to lock the position of the grip handle 20, thereby ensuring the stability of the grip handle 20 in the locked position.

[0062] In other embodiments of this utility model, the locking member 300 can also lock the position of the grip handle 20 in other ways. For example, the locking member 300 can be designed as a rubber part in whole or in part, and use the friction between the rubbers to fix the grip handle 20 in contact with it. Or it can be a magnetic part, and by adsorbing the grip handle 20, the grip handle 20 cannot rotate freely, etc.

[0063] As an optional embodiment of this utility model, such as Figures 1 to 8 As shown, the reset elastic member 500 is a spring, the base has a positioning structure, and the locking member 300 also includes a positioning protrusion 330. The positioning protrusion 330 is fixedly disposed on the side of the locking bar 310 away from the first contact tooth 311. One end of the reset elastic member 500 is sleeved on the positioning protrusion 330, and the other end of the reset elastic member 500 is in contact with the positioning structure. The spring can push the locking member 300 away from the positioning structure through elastic force, so as to press the locking member 300 onto the grip handle 20.

[0064] As an optional embodiment of this utility model, such as Figures 1 to 8 As shown, multiple first contact teeth 311 are distributed along the length direction of the locking bar 310.

[0065] In other embodiments of this utility model, the reset elastic element 500 can also be a rubber band, spring, or other elastic structure.

[0066] As an optional embodiment of this utility model, such as Figures 1 to 4As shown, the first mating surface is a receiving groove (a), and the second mating surface is a contact plane (b). The contact plane (b) is located on the side of the receiving groove (a) away from the hinge axis between the locking member 300 and the base. When the mating part (102) is in the locked position, it mates with the receiving groove (a). When the mating part (102) is in the released position, it mates with the contact plane (b).

[0067] That is, the locking member 300 has a receiving groove a at the locking position corresponding to the mating part 102. When the drive shaft 100 rotates to the locking position and the mating part 102 enters the receiving groove a, the mating part 102 will collide with the bottom of the receiving groove a due to the height difference when the mating part 102 slides into the receiving groove a and make a crisp "click" sound. This makes it easier for the operator to judge whether the lock is in place, thereby further ensuring the efficiency and stability of the surgical operation.

[0068] Alternatively, as another optional embodiment of this utility model, such as Figures 5 to 8 As shown, the first mating surface is a plane (c), and the second mating surface is an inclined plane (d). The plane (c) is located on the side of the inclined plane (d) away from the hinge axis between the locking member 300 and the base. When the mating part (102) is in the locked position, it mates with the inclined plane (d). When the mating part (102) is in the released position, it mates with the plane (c).

[0069] That is, both the first mating surface and the second mating surface are designed as flat surfaces, and due to the different angles of the two, an edge structure is generated at the junction. When the mating part 102 slides over the edge structure, it collides with the locking part 300 due to the height difference and makes a crisp "click" sound, which makes it easier for the operator to judge whether it is locked in place, thereby further ensuring the efficiency and stability of the surgical operation.

[0070] As an optional embodiment of this utility model, such as Figures 1 to 4 As shown, the surface of the mating part 102 facing the locking member 300 is a cylindrical surface, and the axis of the cylindrical surface is arranged in the same direction as the axis of the drive shaft 100. Correspondingly, the inner wall of the receiving groove a is also a cylindrical surface.

[0071] As an optional embodiment of this utility model, such as Figures 1 to 8 As shown, the second end of the locking bar 310 gradually bends away from the first contact tooth 311 along the direction away from the contact block 320 to adapt to the arc trajectory when the grip handle 20 rotates, so that the first contact teeth 311 distributed at different positions along the arc on the locking bar 310 can contact the grip handle 20 at different positions.

[0072] As an optional embodiment of this utility model, such as Figures 1 to 8As shown, the contact block 320 extends along the side away from the first contact tooth 311, and the receiving groove a is located on the side of the contact block 320 close to the first contact tooth 311 along its rotation direction. The contact block 320 also has a contact plane b, which is located on the side of the receiving groove a away from the hinge axis between the locking member 300 and the base. When the drive shaft 100 rotates to the release position, the mating part 102 leaves the receiving groove a and contacts the contact plane b.

[0073] As an optional embodiment of this utility model, such as Figures 1 to 8 As shown, a hinged through hole 321 is formed on the locking member 300, and a locking hinge shaft is fixedly provided on the base. The locking hinge shaft passes through the hinged through hole 321 to hinge the locking member 300 to the base.

[0074] As a preferred embodiment of this utility model, such as Figures 1 to 9 As shown, the locking mechanism also includes a spring-loaded assembly 200, which includes a spring block 210. The spring-loaded assembly 200 can drive the spring block 210 to move along the axis of the drive shaft 100 by elastic force. The drive shaft 100 also has a spring-loaded contact portion 101, which abuts against the spring block 210 and can press the spring block 210 when the drive shaft 100 is rotated between the release position and the locking position.

[0075] In this embodiment of the present invention, the locking mechanism further includes a spring-loaded component 200. The spring-loaded component 200 drives the spring block 210 to maintain contact with the spring-loaded contact portion 101 on the drive shaft 100 through elastic force. During the process of the drive shaft 100 rotating to the release position or the locking position, the spring block 210 will be pressed down. Thus, after the drive shaft 100 rotates to the release position or the locking position, the spring block 210 can press the spring-loaded contact portion 101 to keep it in its current rotation position, automatically keeping the drive shaft 100 in the release position or the locking position, thereby automatically keeping the locking member 300 in the locked position and the unlocked position, further improving the stability of the surgical operation.

[0076] As an optional embodiment of this utility model, such as Figure 9 As shown, the spring-loaded assembly 200 also includes a receiving shell 220 fixedly connected to the base. The drive shaft 100 is sleeved inside the receiving shell 220 and rotates relative to the receiving shell 220 around its own axis, thereby achieving a movable arrangement within the base. The drive assembly is an independent functional component that can be installed on the base, pre-assembled independently of other modules of the surgical instrument, and can be individually debugged, exhibiting stable performance. During assembly, it is unaffected by the installation of other external accessories, is easy to replace, and is beneficial for maintaining precision and mass production.

[0077] As an optional embodiment of this utility model, such as Figure 9As shown, the spring-loaded assembly 200 also includes an elastic element 230. Both the elastic element 230 and the spring block 210 are disposed in the housing 220. The elastic element 230 can drive the spring block 210 to move toward the drive shaft 100 by elastic force so that the spring block 210 keeps in contact with the spring-loaded contact portion 101.

[0078] As an optional embodiment of this utility model, such as Figures 1 to 8 As shown, the housing 220 and the drive shaft 100 are both located on the side of the contact block 320 close to the first contact tooth 311 along its rotation direction, and the drive shaft 100 is located between the housing 220 and the contact block 320.

[0079] As an optional embodiment of this utility model, such as Figures 1 to 8 As shown, the elastic element 230 is a spring, and the elastic element 230 is disposed between the spring block 210 and the inner wall of the receiving shell 220 on the side away from the drive shaft 100.

[0080] As a preferred embodiment of this utility model, such as Figure 9 As shown, the housing 220 includes a guide housing 221 and a hinge cylinder 222. An elastic element 230 and a spring block 210 are both disposed in the guide housing 221. The elastic element 230 is disposed between the inner wall of the first end of the guide housing 221 and the opening of the second end of the guide housing 221, and can drive the spring block 210 to move toward the opening of the guide housing 221 by elastic force. The hinge cylinder 222 is connected to the second end of the guide housing 221 and is sleeved on the drive shaft 100. A communicating opening is formed on the side wall of the hinge cylinder 222 facing the guide housing 221, and the spring-loaded contact part 101 passes through the communicating opening and enters the guide housing 221.

[0081] In this embodiment of the utility model, the housing 220 includes a guide housing 221 and a hinge cylinder 222. The spring block 210 is slidably disposed in the guide housing 221. The elastic element 230 extends into the guide housing 221 and contacts the spring block 210. Thus, after rotating to any position, the rotation position of the elastic element 230 can be limited by the spring block 210 and the inner wall of the housing, ensuring the stability of the drive shaft 100 in the release position or the locking position.

[0082] As an optional embodiment of this utility model, such as Figure 9 As shown, a cut-off opening is formed on the side wall of the hinged cylinder 222 away from the guide housing 221, and the axial position of the cut-off opening corresponds to the axial position of the connecting opening.

[0083] As a preferred embodiment of this utility model, such as Figure 9 As shown, the side of the spring block 210 facing the drive shaft 100 has a first cylindrical contact surface m1, as... Figure 11As shown, the spring-loaded contact portion 101 has a second cylindrical contact surface m2 on the side facing the first end of the guide housing 221. The axis of the first cylindrical contact surface m1 and the axis of the second cylindrical contact surface m2 both extend in the same direction as the axis of the drive shaft 100, and the first cylindrical contact surface m1 and the second cylindrical contact surface m2 are in contact with each other.

[0084] In the embodiments of this utility model, such as Figure 9 As shown, the spring block 210 has a first cylindrical contact surface m1, and the spring pressure contact part 101 has a second cylindrical contact surface m2. The two are in contact with each other through the cylindrical surfaces, thereby reducing the friction between the spring block 210 and the spring pressure contact part 101 during the rotation of the spring pressure contact part 101 and extending the service life of the overall structure.

[0085] As an optional embodiment of this utility model, such as Figure 9 As shown, guide grooves 221a are formed on opposite side walls of guide housing 221. One end of guide groove 221a is connected to the opening at the second end of guide housing 221, and the other end of guide groove 221a extends toward the first end of guide housing 221. The spring block 210 has a pair of guide protrusions 211, which are accommodated in the guide grooves 221a of guide housing 221.

[0086] As an optional embodiment of this utility model, such as Figure 9 As shown, the guide protrusion 211 is cylindrical in shape.

[0087] As an optional embodiment of this utility model, such as Figure 9 As shown, the housing 220 also includes a sealing piece 223. The first end of the guide housing 221 has an installation port 221b through which the elastic member 230 can pass. The sealing piece 223 is fixedly connected to the guide housing 221 and closes the installation port 221b.

[0088] As an optional embodiment of this utility model, the locking mechanism further includes multiple fixing fasteners, such as... Figure 9 As shown, the housing 220 also includes a plurality of fixing ears 224, which are fixedly disposed on the guide housing 221. The fixing ears 224 have fixing through holes formed in them along the axial direction of the drive shaft 100. A plurality of fixing fasteners pass through the plurality of fixing through holes and are fixedly connected to the base.

[0089] As a preferred embodiment of this utility model, such as Figure 10 , Figure 11As shown, the drive shaft 100 includes a rotating shaft 110 and a convex shaft 120. The rotating shaft 110 includes a shaft rod 111 and a first positioning plate 112 disposed on the shaft rod 111. The convex shaft 120 includes a bushing 121 and a second positioning plate 122. The spring-loaded contact part 101, the mating part 102 and the second positioning plate 122 are all disposed on the bushing 121, and the second positioning plate 122 is located between the spring-loaded contact part 101 and the mating part 102. One end of the bushing 121 near the spring-loaded contact part 101 is disposed in the receiving shell 220, and one end of the shaft rod 111 passes through the bushing 121.

[0090] In this embodiment of the present invention, the drive shaft 100 is a split design, including a rotating shaft 110 and a convex shaft 120 sleeved on the shaft rod 111. The bushing 121 of the convex shaft 120 is movably disposed in the receiving shell 220, and the first positioning plate 112 on the rotating shaft 110 and the second positioning plate 122 on the convex shaft 120 respectively contact the two sides of the receiving shell 220 and form a limit (specifically, contact the two end faces of the hinge cylinder 222), which further ensures the positional stability between the drive shaft 100 and the spring pressure assembly 200 and ensures the reliability of the surgical instrument.

[0091] As an optional embodiment of this utility model, such as Figure 10 , Figure 11 As shown, the drive shaft 100 also includes a positioning pin 130. The bushing 121 has a positioning through hole 121a that penetrates the side wall of the bushing 121 radially. The positioning pin 130 passes through the positioning through hole 121a and is fixedly connected to the shaft 111.

[0092] As an optional embodiment of this utility model, the shaft 111 has a threaded hole, and the positioning pin 130 is a screw.

[0093] As a second aspect of this utility model, a surgical instrument is provided, such as... Figures 12 to 19 As shown, the surgical instrument includes a handle housing 10 and a gripping handle 20. The gripping handle 20 is movably connected to the handle housing 10 and is used to operate the opening and closing of the surgical instrument forceps assembly. The surgical instrument also includes a locking mechanism provided in this embodiment of the invention. The base of the locking mechanism is disposed on the handle housing 10, and the dial 400 is located outside the handle housing 10. The locking member 300 can engage with the gripping handle 20 when rotated to the locked position to lock the position of the gripping handle 20.

[0094] In the surgical instrument provided by this utility model, the locking member 300 and the drive shaft 100 of the locking mechanism can rotate around their respective axes, and the mating part 102 on the drive shaft 100 can press against the surface of the locking member 300 during rotation and drive the locking member 300 to rotate to different positions; the end of the drive shaft 100 is provided with a knob 400. When the knob 400 is turned to drive the drive shaft 100 to rotate to the locking position, the mating part 102 can drive the locking member 300 to rotate to the locking position, so that the locking member 300 engages with the gripping handle 20 and locks the position of the gripping handle 20, thereby fixing the feed amount of the gripping handle 20 and keeping the forceps assembly of the surgical instrument at the current opening and closing angle;

[0095] When the toggle switch 400 rotates the drive shaft 100 to the release position, the mating part 102 pushes the locking member 300 to the unlock position, causing the locking member 300 to leave the grip handle 20, allowing the grip handle 20 to move freely, and thus allowing the operator to control the forceps assembly to open and close freely. This utility model adopts a toggle switch 400 and drive shaft 100 toggle structure design. Compared with the existing technology that uses rollers and other structures to lock the handle angle, the action required to switch between the locked and released states is simpler. Moreover, the rotation angle of the external toggle switch 400 makes it easier for the operator to perceive and observe its locked and unlocked states, which helps to improve the stability of surgical operations.

[0096] Optionally, such as Figures 12 to 19 As shown, the surgical instrument also includes a push assembly 30, a connecting rod 41, a drive rod 42, and a clamping device (not shown in the figure). The connecting rod 41 and the drive rod 42 are both connected between the handle housing 10 and the clamping device. The push assembly 30 is disposed in the handle housing 10 and connected between the grip handle 20 and the drive rod 42. When the grip handle 20 is active, the push assembly 30 can drive the drive rod 42 to move relative to the connecting rod 41 along its length direction, so as to drive the forceps assembly in the clamping device to open or close.

[0097] As an optional embodiment of this utility model, such as Figures 12 to 19 As shown, the base of the locking mechanism is integrally formed with the handle housing 10.

[0098] As a preferred embodiment of this utility model, such as Figures 12 to 16 As shown, the handle housing 10 includes an adjustment housing 11, a transition housing 12, and a grip housing 13 connected vertically in sequence. One end of the drive rod 42 is inserted into the adjustment housing 11 and connected to the push assembly 30. The drive shaft 100 of the locking mechanism is horizontal (i.e., Figure 14The handle 20 extends through the transition shell 12 in the left and right direction. The grip handle 20 is hinged to the handle housing 10 and can rotate around the hinge axis and enter and exit the grip shell 13. The handle housing 10 has a tiger's mouth groove 12a at the connection between the adjustment shell 11 and the transition shell 12. The lateral dimension of the handle housing 10 at the tiger's mouth groove 12a gradually decreases and then gradually increases along the vertical direction.

[0099] The distance between the surface of the transition shell 12 facing away from the grip handle 20 and the locking mechanism gradually decreases and then gradually increases in the vertical direction, and the height at the minimum distance corresponds to the height of the tiger's mouth groove 12a.

[0100] In this embodiment of the utility model, the handle housing 10 includes an adjustment housing 11, a transition housing 12, and a grip housing 13 arranged vertically in sequence. The grip housing 13 is used for the fingers other than the thumb and index finger to grip and perform related actions of gripping the handle 20 by gripping or releasing the grip handle 20. The adjustment housing 11 is provided with corresponding components for connecting to the connecting rod 41 and the drive rod 42. The outer surface of the transition housing 12 connected between the two is designed to be concave, that is, the thumb and index finger grooves 12a are provided on both sides along the horizontal direction. The thumb and index finger grooves 12a allow the thumb and index finger to grip the handle housing 10 from both sides, and at the same time facilitate the thumb and index finger to adjust the corresponding components on the adjustment housing 11 and the transition housing 12.

[0101] Meanwhile, the transition shell 12 is recessed inward at the position corresponding to the tiger's mouth area of ​​the human hand, and corresponds to the position of the tiger's mouth groove 12a, which further ensures the control effect of the thumb, index finger and tiger's mouth on the handle shell 10, improves the comfort and convenience of the operator in controlling the surgical instrument, and optimizes the user experience of the surgical instrument.

[0102] Preferably, the transition shell 12 has a movable groove 12b on at least one side along the lateral direction. The bottom of the movable groove 12b is formed with a clearance shaft hole that extends into the interior of the transition shell 12. At least one end of the drive shaft 100 passes through the clearance shaft hole and is fixedly connected to the knob 400 in the movable groove 12b. That is, the handle housing 10 is recessed inward at the position of the knob 400 corresponding to the locking mechanism to form the movable groove 12b. The knob 400 is accommodated in the movable groove 12b and can move in the movable groove 12b. This reduces the lateral width of the surgical instrument corresponding to the locking mechanism position while improving the smoothness of the vertical change of the outer contour of the surgical instrument. The knob 400 does not protrude significantly from the outside of the surgical instrument, which helps to prevent accidental activation and ensures the stability and safety of the surgical operation.

[0103] As an optional embodiment of this utility model, such as Figures 12 to 19As shown, one end of the dial 400 is fixedly connected to the drive shaft 100, and the other end of the dial 400 extends in the opposite direction to the through direction of the connecting rod 41 and the drive rod 42. That is, the free end of the dial 400 extends in the direction toward the thumb or index finger, which is convenient to accommodate operation of fingers of different lengths.

[0104] As an optional embodiment of this utility model, such as Figure 15 As shown, the bottom wall of the movable groove 12b is connected to the outer wall of the transition shell 12 on the side facing the grip handle 20. That is, the movable groove 12b does not have a side wall on the downward side. The dial 400 can be rotated outside the movable groove 12b in the unlocked position, which makes it easier for the operator to push the dial 400 back to the locked position.

[0105] As an optional embodiment of this utility model, such as Figures 12 to 14 As shown, a strip-shaped protrusion 410 is formed on the surface of the dial 400 opposite to the transition shell 12. The strip-shaped protrusion 410 extends along the length of the dial 400. The strip-shaped protrusion 410 can increase the friction between the dial 400 and the finger, thereby making it easier for the operator to turn the dial.

[0106] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the grip handle 20 is provided with a plurality of second contact teeth 20a, and the plurality of first contact teeth 311 contact the plurality of second contact teeth 20a when rotated to the locked position.

[0107] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the grip handle 20 includes a handle portion 21, a drive connection portion 22, and a handle hinge portion 23. The first end of the handle hinge portion 23 is fixedly connected to the side of the handle portion 21 facing the locking member 300, and the second end of the handle hinge portion 23 is hinged to the handle housing 10. The axis of the hinge between the handle hinge portion 23 and the handle housing 10 is arranged in the same direction as the axis of the drive shaft 100. The drive connection portion 22 is fixedly disposed on the side of the handle portion 21 facing the drive rod 42, and the drive connection portion 22 is connected to the push assembly 30.

[0108] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the push assembly 30 includes a hinge rod 31 and a hinge seat 32. The first end of the hinge rod 31 is hinged to the drive connection part 22, the second end of the hinge rod 31 is hinged to the first end of the hinge seat 32, and the second end of the hinge seat 32 is hinged to the handle housing 10. The axes of the three hinge points are all arranged in the same direction as the axis of the drive shaft 100. A limiting groove extending along the length direction of the hinge seat 32 is formed in the hinge seat 32. One end of the drive rod 42 has a connecting ball head, which is movably disposed in the limiting groove and can slide along the limiting groove.

[0109] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the drive connection parts 22 are arranged in pairs on both sides of the hinge rod 31 along the axis of the drive shaft 100.

[0110] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the handle hinge portion 23 is provided in pairs on both sides of the locking member 300 along the axis of the drive shaft 100.

[0111] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the inner wall of the transition shell 12 has a hinge protrusion 12c, which passes through the hinge hole on the handle hinge part 23.

[0112] As a preferred embodiment of this utility model, such as Figures 17 to 19 As shown, the grip handle 20 also includes a toothed member 24, which is fixedly disposed on the side of the handle portion 21 facing the locking member 300, and the surface of the toothed member 24 facing the locking member 300 has a plurality of second contact teeth 20a.

[0113] In this embodiment of the invention, the grip handle 20 is provided with a replaceable insert tooth 24, so that after the second contact tooth 20a wears out due to long-term use, a new insert tooth 24 can be directly replaced without replacing the entire grip handle 20, thus reducing the maintenance cost of surgical instruments.

[0114] As an optional embodiment of this utility model, such as Figures 17 to 19 As shown, the grip handle 20 also includes multiple positioning members. The handle portion 21 has a tooth fixing groove on the side facing the locking member 300. The tooth member 24 is accommodated in the tooth fixing groove. The handle portion 21 also has multiple first positioning holes extending along the axis of the drive shaft 100. The first positioning holes communicate with the tooth fixing groove. The tooth member 24 has multiple second positioning holes extending along the axis of the drive shaft 100. The multiple positioning members pass through the multiple first positioning holes and the multiple second positioning holes respectively to fix the tooth member 24 to the handle portion 21.

[0115] Alternatively, the positioning element is a pin.

[0116] As an optional embodiment of this utility model, such as Figure 16 As shown, the handle housing 10 includes housing parts arranged symmetrically in the transverse direction. The different parts of the two housing parts are joined together in the vertical direction to form an adjustment housing 11, a transition housing 12 and a gripping housing 13.

[0117] As an optional embodiment of this utility model, the connecting rod 41 is a hollow tube, and the driving rod 42 passes through the interior of the connecting rod 41.

[0118] As an optional embodiment of this utility model, such as Figures 12 to 14 As shown, the surgical instrument also includes a rotating assembly 60, and a connecting rod 41 is connected to the rotating assembly 60. The rotating assembly 60 is disposed on the handle housing 10 and can drive the connecting rod 41 to rotate relative to the handle housing 10 around its own axis.

[0119] As an optional embodiment of this utility model, such as Figures 12 to 14 As shown, the rotating component 60 is mounted on the adjusting housing 11.

[0120] As an optional embodiment of this utility model, such as Figures 12 to 14 As shown, the surgical instrument also includes a swing assembly 70 and a swing rod (not shown in the figure). The swing rod is connected between the swing assembly 70 and the swing assembly 70 of the clamping device. The swing assembly 70 is disposed in the handle housing 10 and can drive the swing rod to move relative to the connecting rod 41 along its length direction, so as to drive the swing assembly 70 to swing the forceps assembly.

[0121] As an optional embodiment of this utility model, such as Figures 12 to 14 As shown, the yaw component 70 is disposed in the adjustment housing 11 and is located between the rotating component 60 and the pushing component 30.

[0122] As an optional embodiment of this utility model, the connecting rod 41 is a hollow tube, and the deflecting rod passes through the interior of the connecting rod 41.

[0123] As an optional embodiment of this utility model, the deflector rod is a hollow tube, and the drive rod 42 passes through the interior of the deflector rod. That is, the drive rod 42, the deflector rod and the connecting rod 41 form a multi-layer sleeve structure.

[0124] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A locking mechanism connected to a base, characterized in that, The device includes a drive assembly and a locking element (300). The drive assembly includes a drive shaft (100) and at least one knob (400). The locking element (300) is hinged to the base. The drive shaft (100) is movably disposed in the base and can rotate about its own axis. The drive shaft (100) has a mating part (102) that contacts and engages with the locking element (300). The mating part (102) can drive the locking element (300) to rotate to the unlocked position when the drive shaft (100) rotates to the released position, and drive the locking element (300) to rotate to the locked position when the drive shaft (100) rotates to the locked position. At least one end of the drive shaft (100) is provided with the knob (400), which can drive the drive shaft (100) to rotate.

2. The locking mechanism according to claim 1, characterized in that, The locking member (300) has an intersecting first mating surface and a second mating surface. When the mating part (102) rotates from the first mating surface to the second mating surface, or from the second mating surface to the first mating surface, a prompting sound is generated.

3. The locking mechanism according to claim 2, characterized in that, The locking member (300) includes a locking bar (310) and a contact block (320). The first end of the locking bar (310) is fixedly connected to the contact block (320) and hinged to the base. The second end of the locking bar (310) has a plurality of first contact teeth (311) formed on its side. The first mating surface and the second mating surface are disposed on the contact block (320). The locking mechanism also includes a reset elastic member (500), which is connected between the locking bar (310) and the base.

4. The locking mechanism according to claim 2, characterized in that, The first mating surface is a receiving groove (a), and the second mating surface is a contact plane (b). The contact plane (b) is located on the side of the receiving groove (a) away from the hinge axis between the locking member (300) and the base. When the mating part (102) is in the locked position, it mates with the receiving groove (a). When the mating part (102) is in the released position, it mates with the contact plane (b). Alternatively, the first mating surface is a plane (c), and the second mating surface is an inclined plane (d). The plane (c) is located on the side of the inclined plane (d) away from the hinge axis between the locking member (300) and the base. When the mating part (102) is in the locked position, it mates with the inclined plane (d). When the mating part (102) is in the released position, it mates with the plane (c).

5. The locking mechanism according to any one of claims 1 to 4, characterized in that, The drive assembly further includes a spring-loaded assembly (200), which includes a spring block (210) and is capable of driving the spring block (210) to move toward the axis of the drive shaft (100) by elastic force; the drive shaft (100) also has a spring-loaded contact portion (101), which abuts against the spring block (210) and is capable of pressing the spring block (210) when the drive shaft (100) rotates to between the release position and the locking position.

6. The locking mechanism according to claim 5, characterized in that, The spring-loaded assembly (200) also includes a receiving shell (220) fixedly connected to the base, and the drive shaft (100) is sleeved in the receiving shell (220) and rotates about its own axis relative to the receiving shell (220).

7. The locking mechanism according to claim 6, characterized in that, The drive shaft (100) includes a rotating shaft (110) and a convex shaft (120). The rotating shaft (110) includes a shaft (111) and a first positioning plate (112) disposed on the shaft (111). The convex shaft (120) includes a bushing (121) and a second positioning plate (122). The spring-loaded contact part (101), the mating part (102) and the second positioning plate (122) are all disposed on the bushing (121), and the second positioning plate (122) is located between the spring-loaded contact part (101) and the mating part (102). One end of the bushing (121) near the spring-loaded contact part (101) is disposed in the receiving shell (220), and one end of the shaft (111) passes through the bushing (121).

8. The locking mechanism according to claim 5, characterized in that, The spring-loaded assembly (200) further includes a receiving shell (220) and an elastic element (230). The receiving shell (220) is fixedly connected to the base. The elastic element (230) and the spring block (210) are both disposed in the receiving shell (220). The elastic element (230) can drive the spring block (210) to move toward the drive shaft (100) by elastic force so that the spring block (210) keeps in contact with the spring-loaded contact part (101).

9. The locking mechanism according to claim 8, characterized in that, The receiving shell (220) includes a guide shell (221) and a hinge cylinder (222). The elastic element (230) and the spring block (210) are both disposed in the guide shell (221). The elastic element (230) is disposed between the inner wall of the first end of the guide shell (221) and the opening of the second end of the guide shell (221), and can drive the spring block (210) to move toward the opening of the guide shell (221) by elastic force. The hinge cylinder (222) is connected to the second end of the guide shell (221). The hinge cylinder (222) is sleeved on the drive shaft (100). A communicating opening is formed on the side wall of the hinge cylinder (222) facing the guide shell (221). The elastic contact part (101) passes through the communicating opening and enters the guide shell (221).

10. The locking mechanism according to claim 9, characterized in that, The spring block (210) has a first cylindrical contact surface (m1) on the side facing the drive shaft (100), and the spring pressure contact part (101) has a second cylindrical contact surface (m2) on the side facing the first end of the guide housing (221). The axis of the first cylindrical contact surface (m1) and the axis of the second cylindrical contact surface (m2) both extend in the same direction as the axis of the drive shaft (100), and the first cylindrical contact surface (m1) and the second cylindrical contact surface (m2) are in contact with each other.

11. A surgical instrument comprising a handle housing (10) and a gripping handle (20), the gripping handle (20) being movably connected to the handle housing (10), the gripping handle (20) being used to operate the opening and closing of a surgical instrument forceps assembly, characterized in that, The surgical instrument further includes a locking mechanism as described in any one of claims 1 to 10, wherein the base is disposed on the handle housing, the dial (400) is located outside the handle housing (10), and the locking member (300) is capable of engaging with the grip handle (20) when rotated to the locked position to lock the position of the grip handle (20).

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