Locking mechanism

Abstract

The utility model discloses a locking mechanism which comprises a fixed seat and a rotating block, the top of the fixed seat is provided with a fixed disc and a rotating disc which are coaxially and rotatably matched, the fixed disc is fixedly connected with the fixed seat, the rotating disc is fixedly connected with the rotating block, and a locking mechanism is connected between the peripheral surface of the rotating disc and the fixed disc. A pushing plate is slidably mounted at the top of the locking mechanism in the radial direction, and the pushing plate is in transmission fit with the locking mechanism and is suitable for triggering the locking mechanism to unlock the rotating disc. According to the utility model, the fixed seat and the rotating block are rotationally connected through the fixed disc and the rotating disc which are rotationally matched, the fixed seat and the rotating block are fixedly connected with the arc-shaped outer shell and the driving mechanism shell respectively, the positions of the fixed seat and the rotating block are relatively fixed through the locking mechanism, and the pushing plate is pulled through external force, so that the locking mechanism is triggered to unlock; free rotation of the two positions is achieved, then rotation and locking of the shell of the driving mechanism are controlled, the overall structure is simple, assembly is convenient, and control is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a locking mechanism. Background Art

[0002] The full-angle laparoscopic hand-controlled robotic arm surgical instrument is a medical device composed of a clamp head, a catheter, a support frame, a main shell, a handle, a control ring and a handshake connecting rod. In medical practice, it is mostly used to clamp human tissue during surgery. Among them, surgical robotic arm surgical instruments that use wire ropes to control the rotation and opening and closing of the clamp head are more common. During the puncture operation, the clamp head structure of the existing surgical robotic arm surgical instruments needs to be kept straight, and medical staff need to use their other hand to assist in the entry and exit. The lack of a straightening function makes the instrument difficult and laborious to operate, which is easy to cause mistakes and has general practicality.

[0003] The Chinese invention application with application publication number CN115607234A discloses a surgical mechanical arm forceps head locking mechanism, including an arc-shaped outer shell, a forceps head piece, a drive mechanism housing and a handle, wherein the drive mechanism housing rotates with the arc-shaped outer shell. During use, the drive mechanism housing can rotate with the arc-shaped outer shell, the drive mechanism housing and the handle are relatively fixed, and the handle can rotate. When the instrument needs to enter and exit the puncture device, the locking straight component is engaged with the arc-shaped outer shell, so that the drive mechanism housing cannot rotate, and the locking is realized. The forceps head piece is locked straight, and the instrument can be entered and exited by holding the instrument with one hand. During the operation, the locking straight component is separated from the arc-shaped outer shell to realize unlocking. The forceps head piece can be flexibly turned, and the instrument does not need to be assisted by the other hand to enter and exit the puncture device. The locking and unlocking are controlled by the locking control piece. Although the structural design realizes the rotation control of the drive mechanism housing, the overall structure is complex and the assembly difficulty is high. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and proposes a locking mechanism, which is installed between the arc-shaped outer shell and the drive mechanism shell to realize the control of the rotation and locking of the drive mechanism shell. The overall structure is simple, and the assembly and control are convenient.

[0005] The technical solution to achieve the purpose of this utility model is:

[0006] A locking mechanism comprises a fixed seat and a rotating block, wherein a fixed disk and a rotating disk coaxially rotating with each other are provided on the top of the fixed seat, the fixed disk is fixedly connected to the fixed seat, the rotating disk is fixedly connected to the rotating block, a locking mechanism is connected between the outer circumference of the rotating disk and the fixed disk, a push plate is radially slidably installed on the top, the push plate and the locking mechanism are in transmission cooperation and are suitable for triggering the locking mechanism to unlock the rotating disk.

[0007] Furthermore, the outer circumferential surface of the rotating disk is fixedly mounted with connecting blocks symmetrically arranged on both sides of the pushing plate, and the locking mechanism includes an overrunning shaft and a spring connected between the overrunning shaft and the connecting blocks, and the overrunning shaft abuts against the inner wall of the fixed disk under the elastic force of the spring.

[0008] Furthermore, the overrunning shafts are provided with four and are symmetrically arranged in pairs on both sides of the connecting block, and the springs penetrate the connecting block and are fixedly connected to the corresponding overrunning shafts.

[0009] Furthermore, a rotating plate that is rotatably matched and cross-arranged is coaxially provided between the fixed disk and the rotating disk, and claws are staggered at both ends of the rotating plate. The pushing plate is limitedly arranged between two claws of different rotating plates and the surface that fits with the claws is a first inclined surface, and the claws and the overrunning shaft are located on the same circumferential surface.

[0010] Furthermore, an inwardly recessed positioning groove is provided on the outer circumferential surface of the rotating disk, and a side of the connecting block close to the rotating disk cooperates with the positioning groove and is fixed in the positioning groove.

[0011] Furthermore, second inclined surfaces inclined toward the center of the rotating disk are provided on both sides of the positioning groove.

[0012] Furthermore, a side of the rotating block close to the fixed disk is provided with an arc-shaped groove matching the outer circumferential surface of the fixed disk.

[0013] Furthermore, a downwardly recessed limiting groove is provided on the top of the rotating disk, and a first connecting plate is fixedly connected between the rotating block and the rotating disk. The first connecting plate is installed in the limiting groove and the upper surface is flush with the upper surface of the rotating disk.

[0014] Furthermore, a strip groove is provided in the middle of the pushing plate along the length direction, and both ends of the strip groove are provided with a gap with a limit pin installed on the first connecting plate.

[0015] Furthermore, a second connecting plate is provided between the rotating block and the bottom of the fixed seat, one end of the second connecting plate is fixedly connected to the rotating block, and the other end is rotatably connected to the fixed seat.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects:

[0017] (1) The utility model realizes the rotational connection between the fixed seat and the rotating block by rotating the matched fixed disk and the rotating disk. The utility model is installed between the arc-shaped outer shell and the driving mechanism shell, and is respectively fixed to the arc-shaped outer shell and the driving mechanism shell. The relative fixation of the positions of the two is realized by arranging a locking mechanism between the fixed disk and the rotating disk. The pushing plate is pulled by external force, thereby triggering the locking mechanism to unlock, realizing the free rotation of the positions of the two, and then realizing the control of the rotation and locking of the driving mechanism shell. The overall structure is simple, easy to assemble, and easy to control.

[0018] (2) The utility model adopts a structure that combines a spring and an overrunning shaft. The overrunning shaft is pressed tightly by the elastic force of the spring, so that the overrunning shaft abuts against the inner wall of the fixed disk. Under the action of friction force, the relative position of the rotating disk and the fixed disk is locked. The structure is simple, the locking is reliable, and the manufacturing cost is low.

[0019] (3) In the present invention, both sides of each connecting block are provided with overrunning shafts for locking, thereby increasing the locking contact surface, improving the total friction force, and further improving the locking reliability.

[0020] (4) The utility model ingeniously adopts two rotating plates with claw structures to realize the transmission connection between the push plate and the locking mechanism. The push plate pushes the claw to rotate. During the rotation process, the claw squeezes the overrunning shaft located on the same circumferential surface, thereby separating the overrunning shaft from the fixed disk and realizing unlocking.

[0021] (5) The utility model improves the convenience of assembling the connecting block by setting the positioning groove.

[0022] (6) The utility model provides an avoidance space for the rotation of the claws by setting the second inclined surface, thereby avoiding mutual interference during rotation due to installation accuracy problems.

[0023] (7) The utility model provides an arc-shaped groove, which makes the overall structure more compact and saves installation space.

[0024] (8) The utility model securely connects the rotating block and the rotating disk through the first connecting plate, thereby improving the connection reliability and presetting a limiting groove for easy assembly.

[0025] (9) The utility model realizes the sliding of the push plate along a straight line by providing a strip groove and a limit pin, and has a simple structure and reliable sliding.

[0026] (10) The utility model adds a second connecting plate between the rotating block and the fixed seat, which makes the whole structure stronger and further improves the reliability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a top view of the utility model;

[0030] Figure 3 It is a schematic diagram of the assembly structure of the rotating disk and the rotating sheet of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the rotating piece of the utility model.

[0032] The reference numerals in the accompanying drawings are:

[0033] Fixed seat 1, rotating block 2, fixed disk 3, rotating disk 4, limiting groove 4-1, locking mechanism 5, overrunning shaft 5-1, spring 5-2, push plate 6, strip groove 6-1, first connecting plate 7, limiting pin 8, second connecting plate 9, connecting block 10, second inclined surface 10-1, rotating sheet 11, claw 11-1. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] (Example 1)

[0036] like Figures 1 to 4 The locking mechanism shown is installed between the arc-shaped outer shell and the driving mechanism, and includes a fixed seat 1, a rotating block 2, a fixed disk 3, a rotating disk 4, a locking mechanism 5 and a push plate 6. The fixed seat 1 and the rotating block 2 are respectively fixedly connected to the arc-shaped outer shell and the driving mechanism, and the fixed disk 3 and the rotating disk 4 are coaxially rotated together, wherein the fixed disk 3 is fixedly installed on the top of the fixed seat 1, and the rotating disk 4 is fixedly connected to the rotating block 2. The locking mechanism 5 is connected between the outer circumference of the rotating disk 4 and the inner wall of the fixed disk 3 to limit the relative rotation of the two. The push plate 6 is installed on the top of the fixed disk 3 in a radially sliding manner, and is in transmission cooperation with the locking mechanism to trigger the locking mechanism to unlock the rotating disk 4 and realize the free rotation between the arc-shaped outer shell and the driving mechanism.

[0037] Specifically, a circular arc groove matching the outer circumference of the fixed disk 3 is provided on the side of the rotating block 2 close to the fixed disk 3, so that the overall structure is more compact and saves installation space. A downwardly concave limit groove 4-1 is provided on the top of the rotating disk 4, and a first connecting plate 7 is fixedly connected between the rotating block 2 and the rotating disk 4 to improve the connection reliability and the convenience of assembly. The first connecting plate 7 is installed in the limit groove 4-1, and the upper surface is flush with the upper surface of the rotating disk 4 to form a sliding plane. A strip groove 6-1 is opened in the middle of the push plate 6 along the length direction, and both ends of the strip groove 6-1 are gap-provided with limit pins 8 installed on the first connecting plate 7, so as to realize the sliding of the push plate 6 in a straight line direction, with a simple structure and reliable sliding. A second connecting plate 9 is provided between the rotating block 2 and the bottom of the fixed seat 1, one end of the second connecting plate 9 is fixedly connected to the rotating block 2 by two screws, and the other end is rotatably connected to the fixed seat 1 by a rotating pin, so that the integration is stronger and the reliability of the overall structure is further improved.

[0038] The outer circumference of the rotating disk 4 is fixedly mounted with connecting blocks 10 symmetrically arranged on both sides of the push plate. The locking mechanism 5 includes a super-axis 5-1 and a spring 5-2 connected between the super-axis 5-1 and the connecting block 10. The super-axis 5-1 abuts against the inner wall of the fixed disk 3 under the elastic force of the spring 5-2, and the relative position of the rotating disk 4 and the fixed disk 3 is locked under the action of the friction force. The structure is simple, the locking is reliable, and the manufacturing cost is low. In order to facilitate assembly, the outer circumference of the rotating disk 4 is provided with a positioning groove that is recessed inward, and the side of the connecting block 10 close to the rotating disk 4 cooperates with the positioning groove and is fixed in the positioning groove. In order to improve the reliability of locking, the super-axis 5-1 of this embodiment is provided with four and they are symmetrically arranged on both sides of the connecting block 10 in pairs. The two springs 5-2 respectively penetrate the two connecting blocks 10, and the two ends of each spring 5-2 are fixedly connected to the corresponding super-axis 5-2. A rotating piece 11 is coaxially arranged between the fixed disk 3 and the rotating disk 4, and claws 11-1 are staggered at both ends of the rotating piece 11. The push plate 6 is limited between two claws 11-1 at one end of different rotating pieces 11 away from the rotating block, and the surface that fits with the corresponding claw 11-1 is provided with a first inclined surface 6-1 inclined outwardly. The claw 11-1 is pushed to rotate by pulling the push plate 6. The claw 11-1 and the overrunning shaft 5-1 are located on the same circumferential surface. When the claw 11-1 contacts the overrunning shaft 5-1, the overrunning shaft 5-1 is squeezed to shrink toward the connecting block, thereby separating from the inner wall of the fixed disk 3 to achieve unlocking. A second inclined surface 10-1 inclined toward the center of the rotating disk 4 is provided on both sides of the positioning groove to provide an avoidance space for the rotation of the claw 11-1, avoid mutual interference during rotation caused by installation accuracy problems, and further improve the reliability of unlocking.

[0039] In this embodiment, the fixed base 1 and the rotating block 2 are rotatably connected by the rotating matching fixed disk 3 and the rotating disk 4, which are installed between the arc-shaped outer shell and the driving mechanism shell, and are respectively fixed to the arc-shaped outer shell and the driving mechanism shell. The relative fixation of the positions of the two is achieved by arranging a locking mechanism 5 composed of an overrunning shaft 5-1 and a spring 5-2 between the fixed disk 3 and the rotating disk 4. The pushing plate 6 is pulled by an external force, so that the overrunning shaft 5-1 is squeezed by the claw 11-1 of the rotating sheet 11 to trigger the locking mechanism 5 to unlock, thereby achieving free rotation of the positions of the two, and then achieving the control of the rotation and locking of the driving mechanism shell. The overall structure is simple, easy to assemble, and easy to control.

[0040] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A locking mechanism, Features: It includes a fixed seat and a rotating block, the top of the fixed seat is provided with a fixed disk and a rotating disk that are coaxially rotated, the fixed disk is fixedly connected to the fixed seat, the rotating disk is fixedly connected to the rotating block, a locking mechanism is connected between the outer circumference of the rotating disk and the fixed disk, and a pushing plate is radially slidably installed on the top, the pushing plate and the locking mechanism are transmission-coordinated and suitable for triggering the locking mechanism to unlock the rotating disk.

2. A locking mechanism according to claim 1, Features: The outer circumference of the rotating disk is fixedly mounted with connecting blocks symmetrically arranged on both sides of the pushing plate. The locking mechanism includes an overrunning shaft and a spring connected between the overrunning shaft and the connecting blocks. The overrunning shaft abuts against the inner wall of the fixed disk under the elastic force of the spring.

3. A locking mechanism according to claim 2, Features: The overrunning shafts are provided with four and are symmetrically arranged in pairs on both sides of the connecting block. The springs penetrate the connecting block and are fixedly connected to the corresponding overrunning shafts.

4. A locking mechanism according to claim 3, Features: A rotating plate is coaxially arranged between the fixed plate and the rotating plate to rotate and fit together and is cross-arranged. Claws are staggered at both ends of the rotating plate. The push plate is limitedly arranged between two claws of different rotating plates and the surface that fits with the claws is a first inclined surface. The claws and the overrunning shaft are located on the same circumferential surface.

5. A locking mechanism according to claim 2, Features: The outer peripheral surface of the rotating disk is provided with an inwardly recessed positioning groove, and the side of the connecting block close to the rotating disk is matched with the positioning groove and fixedly arranged in the positioning groove.

6. A locking mechanism according to claim 5, Features: Second inclined surfaces inclined toward the center of the rotating disk are provided on both sides of the positioning groove.

7. A locking mechanism according to claim 1, Features: A circular arc groove matching with the outer peripheral surface of the fixed disk is arranged on one side of the rotating block close to the fixed disk.

8. A locking mechanism according to claim 1, Features: A downwardly recessed limiting groove is provided on the top of the rotating disk, and a first connecting plate is fixedly connected between the rotating block and the rotating disk. The first connecting plate is installed in the limiting groove and the upper surface of the first connecting plate is flush with the upper surface of the rotating disk.

9. A locking mechanism according to claim 8, Features: A strip groove is provided in the middle of the pushing plate along the length direction, and both ends of the strip groove are provided with a gap with a limit pin installed on the first connecting plate.

10. A locking mechanism according to claim 1, Features: A second connecting plate is provided between the rotating block and the bottom of the fixing seat, one end of the second connecting plate is fixedly connected to the rotating block, and the other end is rotatably connected to the fixing seat.

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