CN111281725A

CN111281725A - Clamping mechanism

Info

Publication number: CN111281725A
Application number: CN201811492573.5A
Authority: CN
Inventors: 陈彦钧
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2020-06-16
Anticipated expiration: 2038-12-07
Also published as: CN111281725B

Abstract

The invention relates to a clamping mechanism, which comprises a supporting seat, a handle, a clamping unit and a locking unit, wherein the handle is pivoted on the supporting seat, the clamping unit is provided with an upper clamping seat arranged on the supporting seat, a lower clamping seat arranged on the supporting seat and a sliding block arranged on the supporting seat, and the locking unit is provided with a non-slip block arranged on the supporting seat and a locking rod arranged on the supporting seat. Therefore, when the handle is pressed downwards, the lock rod is driven to unlock the anti-slip block to enable the slide block to move, then the lower clamping seat is pushed upwards after the slide block is pushed by the handle, the upper clamping seat and the lower clamping seat clamp a side rail of the operating table, and finally the lock rod is driven to lock the anti-slip block in the resetting process of the handle to enable the slide block to be positioned so as to prevent accidental loosening.

Description

Clamping mechanism

Technical Field

The present invention relates to a clamping mechanism, and more particularly to a clamping mechanism with fast positioning and easy assembly and disassembly.

Background

Prior to performing a surgical operation, a fixture is typically used to mount an auxiliary instrument (e.g., a robotic arm) at the bedside of the operating table, so that the surgeon can perform the operation in a more efficient manner with the aid of the auxiliary instrument.

In the prior art related to the clamp, there is a way to lock the clamp at the bedside of the operating table by a knob, which results in time and labor consuming assembly and disassembly, and in addition, for example, in U.S. Pat. No. 7,003,827, besides the problem of difficult operation and inconvenient assembly, the design of a safety mechanism is lacking, so that the clamp is easily touched by the surrounding people by mistake and is easily accidentally dropped.

Disclosure of Invention

The invention mainly aims to provide a clamping mechanism which is fast in positioning, convenient to disassemble and assemble and good in use safety.

In order to achieve the above objective, the clamping mechanism of the present invention comprises a supporting base, a handle, a clamping unit, and a locking unit. The handle is pivoted at one end of the supporting seat; the clamping unit is provided with an upper clamping seat, a sliding block and a lower clamping seat, the upper clamping seat is fixedly arranged on the top surface of the supporting seat, the sliding block is arranged on the supporting seat and can be pushed by the handle to horizontally move relative to the supporting seat, the lower clamping seat can be arranged on the supporting seat in a vertically moving manner, the top end of the sliding block is provided with an inclined surface, the bottom end of the lower clamping seat is provided with an inclined surface, the inclined surface of the sliding block abuts against the inclined surface of the lower clamping seat, so that the sliding block can be pushed by the handle to push the lower clamping seat upwards from a release position to a clamping position, and when the lower clamping seat is positioned at the clamping position, the lower clamping seat can be matched with the upper clamping seat to clamp a side rail of the operating table in the middle; the locking unit is provided with a slip-proof block, a reset spring and a lock rod, the slip-proof block can be arranged on the supporting seat in a vertically-movable manner and is provided with a second positioning part, the second positioning part of the slip-proof block is matched with a first positioning part of the sliding block, the reset spring acts on the slip-proof block to push the slip-proof block towards the sliding block, the lock rod can be arranged on the supporting seat in a horizontally-movable manner and can be driven by the handle to move between a locking position and an unlocking position relative to the slip-proof block, when the lock rod is positioned at the locking position, a locking part of the lock rod pushes the slip-proof block to position the slip-proof block, the lower clamping seat can be kept at the clamping position, when the lock rod is positioned at the unlocking position, the locking part of the lock rod releases the slip-proof block to enable the slip-proof block to horizontally move, at the moment, a user can move the invention upwards, and the side rail is contacted with the upper clamping seat and the lower clamping seat, so that the side rail applies force to the lower clamping seat to push the sliding block leftwards, and the side rail can be released after the lower clamping seat descends to the release position.

Therefore, the clamping mechanism can be assembled and disassembled by one hand, and has a safety mechanism to avoid accidental loosening caused by accidental touch of others, so as to achieve the purposes of quick positioning, convenient assembly and disassembly and increased use safety.

Preferably, the side rail has an outer side surface, the handle is pivoted to the support base through a pivot, and the axial direction of the pivot is perpendicular to the extending direction of the outer side surface of the side rail, so that the interference between the operating direction of the handle and surrounding people or objects can be avoided, and the operating convenience is further improved.

Preferably, the handle has a push arc, and the slider has a flat abutment surface. Therefore, when the handle is pressed down, the pushing cambered surface of the handle pushes the supported plane of the sliding block, so that the handle pushes the sliding block in a stable and smooth mode.

Preferably, the handle has a first transverse portion and a second transverse portion, the first transverse portion and the second transverse portion are located on the same side of the handle, the length of the first transverse portion is smaller than that of the second transverse portion, the first transverse portion is located lower than that of the second transverse portion, the locking portion is located at one end of the locking rod, and the upright portion and the pushing portion are located at the other end of the locking rod. Thus, when the pushing portion of the lock lever is pushed by the first lateral portion of the handle, the lock lever moves from the locked position toward the unlocked position, and when the upright portion of the lock lever is pushed by the second lateral portion of the handle, the lock lever moves from the unlocked position toward the locked position.

Preferably, the supporting seat has a long hole, one end of the lock rod has a toggle part perpendicular to the upright part, and the toggle part of the lock rod can horizontally pass through the long hole of the supporting seat and protrude out of one side of the supporting seat back to the side rail, so that an operator can unlock with one hand.

Preferably, the supporting seat further has an opening, the anti-slip block has an extending portion, the extending portion of the anti-slip block is embedded in the opening of the supporting seat, the locking unit further has a linkage rod, the linkage rod abuts against a side surface of the supporting seat opposite to the side rail, one end of the linkage rod is fixed to the extending portion of the anti-slip block, and the other end of the linkage rod has a protrusion. Therefore, when the lock rod is located at the locking position, the toggle part of the lock rod pushes the convex part of the linkage rod to serve as a second safety mechanism, and when the lock rod is located at the unlocking position, the toggle part of the lock rod releases the convex part of the linkage rod, so that the anti-slip block allows the sliding block to move.

Preferably, a magnet is arranged in the support seat, the handle is provided with a notch, and when the handle is embedded and clamped in the magnet through the notch, the handle is adsorbed and positioned by the magnet, so that misoperation of the handle is avoided.

The invention is not limited to the details of construction, features, assembly, or use of the clamping mechanism set forth in the following description of the preferred embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Drawings

Fig. 1 is an external perspective view of the clamping mechanism of the present invention fixed to a side rail.

Fig. 2 is an exploded perspective view of the clamping mechanism of the present invention.

Fig. 3 is a plan view of the clamping mechanism of the present invention.

FIG. 4 is a partial perspective view of the clamping mechanism of the present invention, showing primarily the relative position between the first cross-member of the handle and the ejector portion of the locking lever.

FIG. 5 is a partial side view of the clamping mechanism of the present invention, showing primarily the relative position between the first cross-member of the handle and the ejector portion of the locking rod.

FIGS. 6a to 6g are similar to FIG. 3 and mainly show the operation flow of the clamping mechanism of the present invention.

FIG. 7 is a partial perspective view of the clamping mechanism of the present invention, showing primarily the relative position between the first cross-section of the handle and the upright section of the locking lever.

FIG. 8 is a partial side view of the clamping mechanism of the present invention, showing primarily the relative position between the first cross-section of the handle and the upright section of the locking lever.

FIG. 9 is a partially enlarged view of the clamping mechanism of the present invention, mainly showing the structural relationship between the first positioning portion of the slider and the second positioning portion of the anti-slip block.

FIG. 10 is similar to FIG. 9 and mainly shows another embodiment of the first positioning portion of the slider and the second positioning portion of the anti-slip block.

[ notation ] to show

10 clamping mechanism 12 side rail

14 outer side 20 support seat

21 front baffle 22 spacing groove

23 rear baffle 24 elongated hole

Handle with 25 holes and 30 holes

31 gap 32 first transverse extension

33 second transverse extension 34 pushing against the arc

35 pivot 40 clamping unit

41 upper clamping part of upper clamping seat 42

43 mounting seat 44 slide block

45 bearing plane 46 slope

47 first positioning part 472 groove

474 first plane 476 first inclined plane

478 first cambered surface 48 lower clamping seat

49 shaft 50 lower clamping part

51 ramp 60 locking unit

6l of a second positioning part of the anti-slip block 62

622, 624 second plane

626 second slope 628 second arc surface

63 extension 64 return spring

65 carrier plate 66 lock lever

67 limiting part 68 locking part

69 upright 70 toggle

71 linkage rod 72 projection

73 magnet 74 fixing part

81 push-up portion P1 releasing position

P2 Clamp position P3 UnLockable position

P4 Lock position A axial

Detailed Description

In the description, the terms "upper", "lower", "left", "right", "top", "bottom", "inner" and "outer" used in the following description and claims are used as terms of directional terms, and are used as references to directions in the drawings. Next, in the embodiments and the drawings to be described below, the same element numbers denote the same or similar elements or structural features thereof.

Referring to fig. 1 to 5, the clamping mechanism 10 of the present invention includes a supporting base 20, a handle 30, a clamping unit 40, and a locking unit 60.

The support base 20 is composed of a front plate 21 and a rear plate 23. The inner side surface of the front baffle plate 21 is provided with a limiting groove 22, one end of the rear baffle plate 23 is provided with a long hole 24 penetrating through the inner side surface and the outer side surface, and the center of the rear baffle plate 23 is provided with an opening 25 penetrating through the inner side surface and the outer side surface.

The handle 30 is pivotally mounted to one end of the support base 20 by a pivot 35. The handle 30 has a notch 31 on a side facing the front panel 21, the handle 30 has a first transverse portion 32 and a second transverse portion 33 on a side facing the rear panel 23, the first transverse portion 32 has a length smaller than that of the second transverse portion 33, the first transverse portion 32 is located lower than the second transverse portion 33, and the handle 30 further has a pushing arc surface 34 adjacent to the second transverse portion 33.

The clamping unit 40 has an upper clamping seat 41, a slider 44, and a lower clamping seat 48, wherein:

the upper holder 41 is locked to the top end of the backboard 23 by a fixing member such as a screw, one end of the upper holder 41 has a pair of upper clamping portions 42, the other end of the upper holder 41 is integrally connected to a mounting seat 43, and the mounting seat 43 is used for mounting a set of surgical auxiliary instruments (such as a robotic arm, not shown).

The slider 44 is disposed in the supporting base 20 and has a supporting plane 45, when the supporting plane 45 of the slider 44 is pushed by the pushing arc surface 34 of the handle 30, the slider 44 will horizontally displace relative to the supporting base 20, in addition, a slope 46 is formed on the top surface of the slider 44, and a first positioning portion 47 is formed on the bottom surface of the slider 44, in this embodiment, as shown in fig. 9, the first positioning portion 47 is formed by a plurality of grooves 472 arranged at equal intervals, and the groove wall of each groove 472 has a first plane 474 and a first slope 476 relative to the first plane 474.

The lower holder 48 has a shaft 49, the shaft 49 is vertically movably inserted through the supporting base 20, the top end of the shaft 49 is integrally connected to a lower clamping portion 50 located outside the supporting base 20, the bottom end of the shaft 49 has an inclined surface 51, the lower holder 48 abuts against the inclined surface 46 of the slider 44 with the inclined surface 51 (as shown in fig. 6 a), so that the slider 44 pushes the lower holder 48 upward when the slider 44 horizontally displaces.

The locking unit 60 has a stopper 61, a return spring 64, a lock lever 66, and a linkage lever 71, wherein:

the anti-slip block 61 is disposed on the supporting base 20 in a vertically movable manner, the top surface of the anti-slip block 61 has a second positioning portion 62, in this embodiment, as shown in fig. 9, the second positioning portion 62 is composed of a plurality of protrusions 622 arranged at equal intervals, the protrusions 622 are embedded in the grooves 472 in a one-to-one manner, the protrusions 622 have a second plane 624 and a second inclined plane 626 opposite to the second plane 624, the second plane 624 and the second inclined plane 626 of the protrusions 622 are respectively abutted against the first plane 474 and the first inclined plane 476 of the grooves 472, so that the second positioning portion 62 of the anti-slip block 61 and the first positioning portion 47 of the sliding block 44 are matched with each other. In addition, one end of the anti-slip block 61 is provided with an extending part 63, the anti-slip block 61 is embedded in the opening 25 of the back plate 23 through the extending part 63, and the size of the extending part 63 of the anti-slip block 61 is smaller than that of the opening 25 of the back plate 23, so that the anti-slip block 61 and the back plate do not interfere when moving up and down.

The top and bottom ends of the return spring 64 (here, a compression spring) respectively abut against the bottom surface of the sliding block 61 and the top surface of a carrier plate 65, and the carrier plate 65 is locked to the front bezel 21 by a fixing element such as a screw, so that the return spring 64 provides an elastic force to push the sliding block 61 toward the sliding block 44.

The lock rod 66 is disposed on the support base 20 in a horizontally displaceable manner, the lock rod 66 has a limiting portion 67 at the center, the lock rod 66 is embedded in the limiting groove 22 of the front baffle 21 by the limiting portion 67, one end of the lock rod 66 has a locking portion 68, the locking portion 68 of the lock rod 66 is located below the extending portion 63 of the anti-slip block 61, the other end of the lock rod 66 has an upright portion 69, a toggle portion 70 perpendicular to the upright portion 69 and a pushing portion 81 (as shown in fig. 4 and 5), and the toggle portion 70 of the lock rod 66 is disposed through the elongated hole 24 of the rear baffle 23 and protrudes out of the outer side surface of the rear baffle 23 (i.e., a side surface of the support base 20 opposite to the side rail 12, as shown in fig. 1).

The linking rod 71 abuts against the outer side surface of the rear baffle 23 (i.e. the side surface of the support 20 opposite to the side rail 12, as shown in fig. 1), one end of the linking rod 71 has a fixing portion 74, the fixing portion 74 of the linking rod 74 is locked to the extending portion 63 of the anti-slip block 61 by a fixing element such as a screw, so that the linking rod 71 can move synchronously with the anti-slip block 61, the other end of the linking rod 71 has a protrusion 72, and the linking rod 71 abuts against the toggle portion 70 of the lock rod 66 with the protrusion 72, as a second safety mechanism.

In actual installation, the handle 30 is first rotated to make the handle 30 push the pushing portion 81 of the lock lever 66 with the first horizontal portion 32 to start moving the lock lever 66 to the right, and then the first horizontal portion 32 is separated from the pushing portion 81 because the handle 30 swings around the pivot 35. Next, as shown in fig. 6a and 6b (for convenience of explanation, the interlocking lever 71 is omitted in fig. 6 b), when the locking portion 68 of the lock lever 66 is offset from the extending portion 63 of the slide block 61, the lock lever 66 reaches the unlocking position P3, and the slide block 61 at this time can move up and down, and then the handle 30 is continuously pushed to the left, at this time, because the first transverse portion 32 of the handle 30 is relatively short in length, as shown in fig. 7 and 8, the first transverse portion 32 of the handle 30 does not touch the upright portion 69 of the lock lever 66 to avoid interference therebetween in the process of continuously pivoting the handle 30. Then, the handle 30 pushes the abutting plane 45 of the sliding block 44 with the pushing arc surface 34, and at this time, the sliding block 44 can start moving to the right because the sliding block 61 is in a state of being able to move up and down, as shown in fig. 6c and 6d, during the moving process of the sliding block 44, on one hand, the first plane 474 of the first positioning portion 47 pushes the second plane 624 of the second positioning portion 62 of the sliding block 61, so that the sliding block 61 generates repeated up and down movements under the dual actions of the sliding block 44 and the return spring 64, on the other hand, the inclined plane 46 pushes the inclined plane 51 of the lower holder 48, so that the lower holder 48 is pushed up from the releasing position P1 (shown in fig. 6 a) to the clamping position P2 (shown in fig. 6 d), and when the lower holder 48 reaches the clamping position P2, the upper holder 41 can be matched with the operating side rail 12 of the bed. Then, the handle 30 is pushed to the right, so that the handle 30 pushes the upright portion 69 of the lock lever 66 with the second transverse portion 33, as shown in fig. 6e, at this time, because the second transverse portion 33 of the handle 30 is relatively long in length, during the process of reverse pivoting of the handle 30, the second transverse portion 33 of the handle 30 continuously contacts the upright portion 69 of the lock lever 66, so that the lock lever 66 continuously moves to the left until the locking portion 68 of the lock lever 66 and the toggle portion 70 of the lock lever 66 respectively prop against the extending portion 63 of the anti-slip block 61 and the protruding portion 72 of the linkage lever 71, as shown in fig. 6f, the lock lever 66 reaches the locked position P4, so that the anti-slip block 61 cannot move up and down, and at this time, the slide block 44 is positioned by the anti-slip block 61 and cannot move, so that the erection is completed.

However, in order to avoid the handle 30 from malfunctioning, a magnet 73 (as shown in fig. 2) is disposed on the inner side surface of the front bezel 21, and when the handle 30 is in the initial state as shown in fig. 6a, the magnet 73 is embedded in the notch 31 of the handle 30, so that the handle 30 is attracted by the magnet 73 and positioned. In addition, after the erection is completed, the axial direction a of the pivot 35 is perpendicular to the extending direction of the outer side surface 14 of the side rail 12, so that the operation direction of the handle 30 can be prevented from interfering with the surrounding people or objects.

On the other hand, when detaching, the toggle part 70 of the lock lever 66 is toggled to the right with one hand, as shown in fig. 6g, on the one hand, the toggle part 70 of the lock lever 66 is disengaged from the protrusion 72 of the linkage lever 71, on the other hand, the locking part 68 of the lock lever 66 is disengaged from the extension 63 of the anti-slip block 61, the lock lever 66 is moved to the unlock position P3, and then the fixed portion 74 of the linking lever 71 is pressed down by one hand, since the fixing portion 73 of the linking rod 71 is fixed with the extending portion 63 of the anti-slip block 61, the sliding blocks 61 are moved downward simultaneously, so that the sliding blocks 61 compress the return spring 64 on the one hand and release the positioning of the sliding blocks 44 on the other hand, the user can then hold the mounting seat 43 and apply force upward, by contacting the side rail 12 with the upper holder 41 and the lower holder 48, the side rail 12 applies force to the lower holder 48 to push the slider 44 leftward until the lower holder 48 descends to the release position P1 shown in fig. 6a, and then the side rail 12 can be released for disassembly.

It should be added that there may be different structural changes between the groove 472 of the sliding block 44 and the projection 622 of the anti-slip block 61, as shown in fig. 10, the groove 472 of the sliding block 44 has a first plane 474 and a first arc surface 478 opposite to the first plane 474, the projection 622 of the anti-slip block 61 has a second plane 624 and a second arc surface 628 opposite to the second plane 624, the first plane 474 of the groove 472 of the sliding block 44 and the second plane 624 of the projection 622 of the anti-slip block 61 abut against each other, the first arc surface 478 of the groove 472 of the sliding block 44 and the second arc surface 628 of the projection 622 of the anti-slip block 61 abut against each other, and thus the first positioning portion 47 of the sliding block 44 and the second positioning portion 62 of the anti-slip block 61 can also generate the positioning effect by cooperation between each other.

In conclusion, the clamping mechanism 10 of the present invention can be assembled and disassembled with a single hand, and has a safety mechanism to prevent accidental loosening caused by accidental touch by others, so as to achieve the purposes of quick positioning, convenient assembly and disassembly, and increased safety in use.

Claims

1. A clamping mechanism for fixing an auxiliary surgical instrument to a side rail of a surgical bed, the clamping mechanism comprising:

a support base;

a handle pivoted to one end of the support seat;

the clamping unit is provided with an upper clamping seat, a sliding block and a lower clamping seat, the upper clamping seat is fixedly arranged on the top surface of the supporting seat, the sliding block is arranged on the supporting seat and can be pushed by the handle to horizontally move relative to the supporting seat, the sliding block is provided with a first positioning part and an inclined surface, the lower clamping seat can be arranged on the supporting seat in a vertically moving mode and is provided with an inclined surface, the inclined surface of the lower clamping seat abuts against the inclined surface of the sliding block, so that the lower clamping seat can be pushed by the sliding block to ascend from a release position to a clamping position, and when the lower clamping seat is located at the clamping position, the side rail is held between the upper clamping seat and the lower clamping seat; and

a locking unit having a slip-proof block, a reset spring and a lock rod, wherein the slip-proof block is disposed on the support base in a vertically movable manner and has a second positioning portion, the second positioning portion of the slip-proof block is matched with the first positioning portion of the slide block, the reset spring acts on the slip-proof block to push the slip-proof block toward the slide block, the lock rod is disposed on the support base in a horizontally movable manner and can be driven by the handle to move between a locking position and an unlocking position relative to the slip-proof block, when the lock rod is at the locking position, the locking portion of the lock rod pushes the slip-proof block to position the slip-proof block, and when the lock rod is at the unlocking position, the locking portion of the slip-proof lock rod releases the slip-proof block to allow the slip block to move horizontally.

2. The clamping mechanism of claim 1, wherein the side rail has an outer side surface, the handle is pivotally mounted to the supporting base through a pivot, and an axial direction of the pivot is perpendicular to an extending direction of the outer side surface of the side rail.

3. The clamping mechanism of claim 1, wherein the handle has an ejection arc, the slider has an abutment surface, and the ejection arc of the handle pushes the abutment surface of the slider to raise the lower clamping seat from the releasing position to the clamping position.

4. The clamping mechanism of claim 1, wherein the handle has a first transverse portion and a second transverse portion, the first transverse portion and the second transverse portion being located on the same side of the handle, the first transverse portion having a length less than the second transverse portion, the first transverse portion being located lower than the second transverse portion, the locking bar having the locking portion at one end, the locking bar having an upright portion and a pushing portion at the other end, the locking bar moving from the locked position toward the unlocked position when the pushing portion of the locking bar is pushed by the first transverse portion of the handle, the locking bar moving from the unlocked position toward the locked position when the upright portion of the locking bar is pushed by the second transverse portion of the handle.

5. The clamping mechanism of claim 1, wherein the supporting base has a limiting groove, the lock rod has a limiting portion, and the limiting portion of the lock rod is embedded in the limiting groove of the supporting base in a horizontally displaceable manner.

6. The clamping mechanism of claim 1, wherein the supporting base has a long hole, one end of the lock bar has a toggle portion perpendicular to the upright portion, and the toggle portion of the lock bar is horizontally movably inserted through the long hole of the supporting base and protrudes from a side of the supporting base opposite to the side rail.

7. The clamping mechanism as claimed in claim 6, wherein the supporting base further has an opening, the anti-slip block has an extending portion, the extending portion of the anti-slip block is embedded in the opening of the supporting base and receives the locking portion of the lock lever, the locking unit further has a linkage rod, the linkage rod abuts against a side of the supporting base opposite to the side rail, one end of the linkage rod is fixed to the extending portion of the anti-slip block, the other end of the linkage rod has a protrusion, when the lock lever is located at the locking position, the toggle portion of the lock lever pushes the protrusion of the linkage rod, and when the lock lever is located at the unlocking position, the toggle portion of the lock lever releases the toggle protrusion of the linkage rod.

8. The clamping mechanism of claim 1, wherein a magnet is disposed in the supporting base, the handle has a notch, and when the handle is engaged with the magnet through the notch, the handle is attracted by the magnet for positioning.

9. The clamping mechanism of claim 1, wherein the clamping unit further comprises a mounting base, the mounting base is connected to the upper clamp for mounting the surgical auxiliary instrument.

10. The clamping mechanism of claim 1, wherein the first positioning portion of the sliding block comprises a plurality of equally spaced grooves, the second positioning portion of the anti-slip block comprises a plurality of equally spaced protrusions, and the grooves and the protrusions are engaged with each other in a one-to-one manner.