Knob locking mechanism

Abstract

The utility model relates to the technical field of locking devices, in particular to a knob locking mechanism which comprises a locking knob, a rotating shaft, a first locking block, a second locking block, a first locking rod and a second locking rod. The first locking block and the second locking block are fixedly arranged on the periphery of the rotating shaft in a sleeving mode, the rotating shaft is rotationally arranged on an external mechanical supporting arm, the locking knob is arranged at one end of the rotating shaft, the first locking block corresponds to the first locking rod, the second locking block corresponds to the second locking rod, and the locking knob is arranged on the rotating shaft. When the locking knob drives the rotating shaft to rotate, the first locking block and the second locking block synchronously rotate to drive the first locking rod and the second locking rod to move away from each other in the opposite directions. The three-joint supporting arm locking device is novel in structure, ingenious in design and capable of locking a three-joint supporting arm at a time; operation steps of medical staff are greatly simplified, and working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to locking device technical field especially is a knob locking mechanism. BACKGROUND

[0002] In modern medical equipment and industrial machinery, multi-joint arms are increasingly widely used. These arms are usually composed of multiple adjustable angle arms, and precise position control is achieved by adjusting the angle of each arm. However, in the prior art, in order to fix the angle of these arms, it is usually necessary to perform separate locking operations on each arm, which not only increases the complexity of the operation, but also reduces the work efficiency. In particular in the medical field, medical personnel need to quickly and accurately adjust and fix the position of the equipment, and the existing locking mechanism often cannot meet this demand. Specifically, the traditional locking mechanism has the following problems: complicated operation: separate locking operations need to be performed on each arm, increasing the operation steps; low efficiency: multiple locking is required after each adjustment, consuming a long time; inconvenient to use: in some cases, medical personnel may need to operate with one hand, and the traditional locking mechanism is difficult to achieve this; therefore, developing a locking mechanism that can lock the angles of multiple arms at one time, simplifying the operation steps, improving the work efficiency, and ensuring the reliability and convenience of locking, has become a technical problem to be solved. SUMMARY

[0003] The utility model provides a knob locking mechanism for the prior art problem, novel structure, clever design, rotation locking knob, and then drive the rotation of the shaft, under the action of the rotation of the shaft, synchronous drive first locking block and second locking block rotation, due to the rotation of the first locking block and the second locking block, through the knob locking mechanism drive first locking rod tight connection base at the same time, drive second locking rod tight third arm, and then make in the operation locking assembly, can lock the angle of first arm, second arm and third arm at one time;Greatly simplify the operation steps of medical personnel, improve the work efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0005] The utility model provides a kind of knob locking mechanism, it includes locking knob, pivot, first locking block, second locking block, first locking rod and second locking rod, the first locking block and the second locking block coaxial connection, the first locking block and the second locking block are fixedly sleeved in the outer periphery of the pivot respectively, the pivot rotation is arranged on external mechanical support arm, the locking knob is installed in one end of the pivot, the first locking block and the first locking rod are correspondingly arranged, the second locking block and the second locking rod are correspondingly arranged, when the locking knob drives the pivot rotation, first locking rod and second locking rod are driven to move towards and away from by the synchronous rotation of first locking block and second locking block.

[0006] Wherein, the first locking block and the second locking block are cylindrically arranged;

[0007] The first locking block is provided with first let-out inclined plane on the side close to the first locking rod, and the first locking rod is provided with first abutment inclined plane on the end close to the first locking block, and the first abutment inclined plane is matched with the first let-out inclined plane to slide and abut;

[0008] The second locking block is provided with second let-out inclined plane on the side close to the second locking rod, and the second locking rod is provided with second abutment inclined plane on the end close to the second locking block, and the second abutment inclined plane is matched with the second let-out inclined plane to slide and abut.

[0009] Wherein, the first locking rod is provided with first circular-arc recessed surface on the end away from the first locking block, and the second locking rod is provided with second circular-arc recessed surface on the end away from the second locking block.

[0010] Wherein, the end of the pivot is provided with clamping portion, and the inner side of the locking knob is provided with clamping hole matched with the clamping portion.

[0011] Wherein, the clamping portion is integrally formed with the pivot, and the clamping portion is square column.

[0012] Wherein, the knob locking mechanism further includes torsion spring.

[0013] The utility model has the advantages of:

[0014] The utility model discloses novel structure, clever design, the knob locking mechanism of the application embodiment is movably arranged at the connecting place of first supporting arm and second supporting arm, when actually using, after adjusting the angle of first supporting arm, second supporting arm and third supporting arm, in order to be able to lock the angle of first supporting arm, second supporting arm and third supporting arm once, the utility model discloses through knob locking mechanism and first locking rod and second locking rod cooperation action, when actually operating, the locking knob is rotated, and then drives the rotation of the pivot, under the action of pivot rotation, synchronously drives first locking block and second locking block rotation, because the rotation of first locking block and second locking block, through knob locking mechanism drives first locking rod and second locking rod to be tightly connected to the base, and then makes when operating locking assembly, can lock the angle of first supporting arm, second supporting arm and third supporting arm once, simplify the operation difficulty, improve the use convenience, satisfy the demand of operating in the fixed position of reaching any position any angle after third supporting arm connects relevant equipment, greatly simplify the operation step of medical staff, improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the knob locking mechanism of the utility model.

[0016] Figure 2 It is a structure exploded view of the utility model after hiding first locking rod and second locking rod.

[0017] Figure 3 It is a structure schematic view of the utility model in three joint supporting arms.

[0018] Figure 4 It is the internal structure schematic view in Figure 3 .

[0019] The reference signs in Figures 1 to 4 include:

[0020] 1, connecting base; 2, first supporting arm; 3, second supporting arm; 4, third supporting arm; 5, universal ball head; 6, first locking rod; 7, second locking rod; 8, locking knob; 9, pivot; 10, first locking block; 11, second locking block; 12, first let -place inclined surface; 13, first abutment inclined surface; 14, second let -place inclined surface; 15, second abutment inclined surface; 16, first rotating block; 17, second rotating block; 18, torsional spring; 19, circular arc convex surface; 20, first circular arc recessed surface; 21, second circular arc recessed surface; 22, clamping portion; 23, clamping hole. DETAILED DESCRIPTION

[0021] For the convenience of those skilled in the art to understand, the following will be further described with the embodiments and the drawings. The contents mentioned in the embodiments are not limitations of the present application. The present application will be described in detail below with reference to the drawings.

[0022] A rotary knob locking mechanism, as shown in Figures 1 to 2 , comprises a locking knob 8, a rotating shaft 9, a first locking block 10, a second locking block 11, a first locking rod 6 and a second locking rod 7, the first locking block 10 and the second locking block 11 are coaxially connected, the first locking block 10 and the second locking block 11 are respectively fixedly sleeved on the outer periphery of the rotating shaft 9, the rotating shaft 9 is rotationally arranged on an external mechanical support arm, the locking knob 8 is arranged at one end of the rotating shaft 9, the first locking block 10 and the first locking rod 6 are correspondingly arranged, the second locking block 11 and the second locking rod 7 are correspondingly arranged, when the locking knob 8 drives the rotating shaft 9 to rotate, the first locking rod 6 and the second locking rod 7 are driven to move towards or away from each other by the synchronous rotation of the first locking block 10 and the second locking block 11; specifically, as shown in Figures 3-4 , the present application is applied to a three-joint support arm, which comprises a connecting base 1, a first support arm 2, a second support arm 3 and a third support arm 4, one end of the first support arm 2 is rotationally connected with the connecting base 1, the other end of the first support arm 2 is rotationally connected with one end of the second support arm 3, the rotary knob locking mechanism is movably arranged at the connection between the first support arm 2 and the second support arm 3, the other end of the second support arm 3 is movably connected with one end of the third support arm 4; a first locking rod 6 is movably and penetratively arranged in the first support arm 2, a second locking rod 7 is movably and penetratively arranged in the second support arm 3; two ends of the first support arm 2 are penetratively provided with first limiting sliding grooves, the first locking rod 6 is movably arranged in the first limiting sliding grooves; two ends of the second support arm 3 are penetratively provided with second limiting sliding grooves, the second locking rod 7 is movably arranged in the second limiting sliding grooves; the other end of the first support arm 2 is provided with a first rotating block 16, one end of the second support arm 3 is provided with a second rotating block 17, the first rotating block 16 and the second rotating block 17 are rotationally connected with the side walls of each other, the first locking block 10 is sleeved in the first rotating block 16, the second locking block 11 is sleeved in the second rotating block 17; a torsional spring 18 is movably sleeved on the outer periphery of the first locking block 10 or / and the second locking block 11.

[0023] Specifically, the knob locking mechanism is movably arranged at the connecting position of the first supporting arm 2 and the second supporting arm 3, in actual use, after the angles of the first supporting arm 2, the second supporting arm 3 and the third supporting arm 4 are adjusted, in order to lock the angles of the first supporting arm 2, the second supporting arm 3 and the third supporting arm 4 at one time, the knob locking mechanism cooperates with the first locking rod 6 and the second locking rod 7 to move, in actual operation, the locking knob 8 is rotated, and then the rotating shaft 9 is driven to rotate, under the action of the rotating of the rotating shaft 9, the first locking block 10 and the second locking block 11 are synchronously driven to rotate, due to the rotation of the first locking block 10 and the second locking block 11, the first locking rod 6 is driven to abut against the connecting base 1 by the knob locking mechanism, and the second locking rod 7 is driven to abut against the third supporting arm 4, and then the angles of the first supporting arm 2, the second supporting arm 3 and the third supporting arm 4 can be locked at one time when the locking assembly is operated, the operation difficulty is simplified, the use convenience is improved, the demand that the third supporting arm 4 is connected with related equipment to reach any position and any angle and is operated on a fixed position is met, the operation steps of medical staff are greatly simplified, and the work efficiency is improved.

[0024] In the embodiment, the first locking block 10 and the second locking block 11 are both arranged in a cylindrical shape; a first displacement inclined surface 12 is arranged on the side of the first locking block 10 close to the first locking rod 6, a first abutting inclined surface 13 is arranged on the end of the first locking rod 6 close to the first locking block 10, the first abutting inclined surface 13 cooperates with the first displacement inclined surface 12 to slide and abut, a second displacement inclined surface 14 is arranged on the side of the second locking block 11 close to the second locking rod 7, and a second abutting inclined surface 15 is arranged on the end of the second locking rod 7 close to the second locking block 11, the second abutting inclined surface 15 cooperates with the second displacement inclined surface 14 to slide and abut. Specifically, when the angles of the first supporting arm 2, the second supporting arm 3 and the third supporting arm 4 are adjusted, an operator can operate the knob locking mechanism with one hand, the locking knob 8 is rotated, and then the rotating shaft 9 is driven to rotate, under the action of the rotating of the rotating shaft 9, the first locking block 10 and the second locking block 11 are synchronously driven to rotate, due to the rotation of the first locking block 10 and the second locking block 11, the first abutting inclined surface 13 of the first locking rod 6 is separated from the first displacement inclined surface 12 of the first locking block 10, and the second abutting inclined surface 15 of the second locking rod 7 is separated from the second displacement inclined surface 14 of the second locking block 11, in this case, the first locking rod 6 and the second locking rod 7 are respectively moved towards and away from each other, one end of the first locking rod 6 abuts against the connecting base 1, and the second locking rod 7 abuts against the third supporting arm 4.

[0025] In the embodiment of the application, one end of the rotating shaft 9 is provided with a clamping portion 22, and the inner side of the locking knob 8 is provided with a clamping hole 23 matched with the clamping portion 22; further, the clamping portion 22 is integrally formed with the rotating shaft 9, and the clamping portion 22 is in the shape of a square column. Specifically, under the above arrangement, the rotating shaft 9 has good structural integrity and stability, and further, the clamping portion 22 and the clamping hole 23 are matched and clamped to make the connection between the locking knob 8 and the rotating shaft 9 stable.

[0026] In the embodiment of the application, the knob locking mechanism further comprises a torsion spring 18. Specifically, the two ends of the torsion spring 18 are connected to the first rotating block 16 and the second rotating block 17 respectively, and under the action of the torsion spring 18, the first supporting arm 2 and the second supporting arm 3 are supported by the torsion spring 18 when the rotating angle is adjusted.

[0027] In the embodiment of the application, the first locking rod 6 is provided with a first circular-arc recessed surface 20 at one end away from the first locking block 10, and the second locking rod 7 is provided with a second circular-arc recessed surface 21 at one end away from the second locking block 11; wherein the first circular-arc recessed surface 20 is used to connect the circular-arc convex surface 19 of the base 1 to abut and lock, the third supporting arm 4 is provided with a universal ball head 5 movably connected with the other end of the second supporting arm 3, and the second circular-arc recessed surface 21 is used to abut and lock with the surface of the universal ball head 5 of the third supporting arm 4.

[0028] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed in the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment are within the scope of the present application.

Claims

1. A knob lock mechanism, characterized by: The locking knob, the rotating shaft, the first locking block, the second locking block, the first locking rod and the second locking rod are coaxially connected, the first locking block and the second locking block are fixedly sleeved on the outer periphery of the rotating shaft, the rotating shaft is rotationally arranged on an external mechanical support arm, the locking knob is arranged at one end of the rotating shaft, the first locking block and the first locking rod are correspondingly arranged, the second locking block and the second locking rod are correspondingly arranged, when the locking knob drives the rotating shaft to rotate, the first locking rod and the second locking rod are driven to move towards or away from each other through synchronous rotation of the first locking block and the second locking block.

2. A knob locking mechanism according to claim 1, wherein: The first locking block and the second locking block are both arranged in a cylindrical shape. The first locking block is provided with a first clearance inclined surface on the side close to the first locking rod, the first locking rod is provided with a first abutting inclined surface on the end close to the first locking block, and the first abutting inclined surface is matched with the first clearance inclined surface to slide and abut. The second locking block is provided with a second clearance inclined surface on the side close to the second locking rod, the second locking rod is provided with a second abutting inclined surface on the end close to the second locking block, and the second abutting inclined surface is matched with the second clearance inclined surface to slide and abut.

3. A knob locking mechanism according to claim 1, wherein: The first locking rod is provided with a first circular-arc recessed surface on the end away from the first locking block, and the second locking rod is provided with a second circular-arc recessed surface on the end away from the second locking block.

4. The knob lock mechanism of claim 1, wherein: One end of the rotating shaft is provided with a clamping portion, and the inner side of the locking knob is provided with a clamping hole matched with the clamping portion for clamping.

5. A knob lock mechanism according to claim 4, wherein: The clamping portion is integrally formed with the rotating shaft, and the clamping portion is in a square column shape.

6. A knob lock mechanism according to claim 1, wherein: The knob locking mechanism further comprises a torsion spring.

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