CN108969161B

CN108969161B - Intervertebral motion retaining device and positioning type implantation instrument and implantation method thereof

Info

Publication number: CN108969161B
Application number: CN201810847477.1A
Authority: CN
Inventors: 刘伟强; 祝佳; 廖振华; 卢俊哲; 徐林; 俞兴; 穆晓红
Original assignee: Shenzhen Research Institute Tsinghua University
Current assignee: Shenzhen Research Institute Tsinghua University
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2021-08-03
Anticipated expiration: 2038-07-27
Also published as: CN111419485A; CN108969161A

Abstract

The invention relates to the technical field of medicine, in particular to an intervertebral motion retention device, a positioning type implantation instrument and an implantation method thereof. The process of the implantation method of the invention is in place by one step, after the intervertebral motion retaining device is sent to the preset implantation area, the whole implantation instrument does not need to be additionally adjusted and moved, and the implantation and the release of the product can be completed only by rotating the rotating sleeve, thereby effectively reducing the implantation difficulty of the product and simplifying the operation flow of the operation.

Description

Intervertebral motion retaining device and positioning type implantation instrument and implantation method thereof

Technical Field

The invention relates to the technical field of medicine, in particular to an intervertebral motion retaining device, a positioning type implanting instrument and an implanting method thereof.

Background

The intervertebral motion retention device has several products such as Bryan, Prestige product series, ProDisc C, Mobi-C, PCM, SRCURE-C and the like which are approved by the FDA at present and are widely used all over the world, and the products are all provided with unique special implantation instrument products, but certain improvement spaces exist in part of the special implantation instrument products. At present, no intervertebral motion retention device in China is approved by CFDA (computational fluid dynamics), most intervertebral motion retention devices in China are in the patent stage, and special implantation instruments are rarely designed in the patent products in a targeted mode.

The common implantation instruments widely used in the market at present mostly adopt an external holding part to keep still, and a clamping shaft at which a clamping head directly contacted with an intervertebral motion retaining device product is positioned moves back and forth to realize the clamping and the loosening of the intervertebral motion retaining product by the implantation instrument.

In view of this kind of situation in this technical field at present, a section can highly adapt to human centrum anatomy appearance, the healthy segmental motion condition of operation segmental postoperative motion approaching furthest, to the disease can safe effective and long service life's intervertebral motion retention device to and its simple structure that corresponds, can effectively reduce the processing degree of difficulty, be convenient for doctor's operation location, the special implantation apparatus that product positioning accuracy is high and product centre gripping effect is steady firm has urgent market demand.

Disclosure of Invention

The invention aims to provide an intervertebral motion retaining device which has a high bionic structure, excellent wear performance of a friction matching pair, a motion range within an actual vertebral body motion range and innovative structural application. Another object of the present invention is to provide a positioning type implantation instrument for an intervertebral motion preservation device, which can help the implantation position of the intervertebral motion preservation device not to be changed by the operation of the instrument once being determined, and is convenient for the operation of doctors; it is another object of the present invention to provide a method of implantation using an intervertebral motion preservation device in combination with a dedicated positionable implantation instrument therefor. The invention aims to solve the following problems of the traditional intervertebral motion retaining device implantation instrument and the implantation method: the shape of a clamping shaft and the inner cavity of a holding rod of the traditional intervertebral motion retaining device have high matching requirements, so that the problems of complex structure, high processing technical requirement, high processing difficulty and the like are caused; secondly, the clamping and the loosening of the intervertebral motion retaining device are realized by the back-and-forth movement of the clamping shaft of part of the traditional intervertebral motion retaining device implanting instruments, and an operator needs to slightly back-and-forth move the whole implanting instrument to compensate the moving distance of the clamping shaft in the implanting process, so that the accuracy of the implanting position of the intervertebral motion retaining device is influenced to a certain degree and the use difficulty of the operator is increased.

The technical scheme of the invention is as follows: the utility model provides an intervertebral motion keeps device, intervertebral motion keeps device comprises last coaptation board, inside lining, nucleus pulposus and lower coaptation board, and the inside lining nests in last coaptation board, and the nucleus pulposus nests in the coaptation board down, and inside lining and nucleus pulposus form the spherical friction pair of clearance fit formula, the intervertebral motion keeps device to go up the coaptation board rear end left and right sides and is equipped with the centre gripping groove, lower coaptation board be equipped with in the relevant position with last coaptation board on same symmetrical centre gripping groove.

Preferably, the centre gripping groove comprises open area, indent clamping area, buckling area and stopper, and open area and clamping area, buckling area intercommunication are in the same place, leave certain thickness between centre gripping groove and the last coaptation board upper surface, incompletely run through the coaptation board, the stopper is located under the buckling area, and the stopper in the symmetry centre gripping groove on the lower coaptation board is located directly over the buckling area, is convenient for implant the instrument and restricts the removal of intervertebral motion retention device upper and lower direction.

The other technical scheme of the invention is as follows: the positioning type implanting instrument for the intervertebral motion retaining device is composed of clamping rods, a rotating sleeve, a holding handle and fixing pins, wherein the clamping rods penetrate through the inner cavity of the rotating sleeve and are in threaded connection with the rear portion of the inner cavity of the rotating sleeve, the clamping rods are fixedly connected with the holding handle through the pins, when the rotating sleeve rotates, the clamping rods can move forwards or backwards along the axial direction of the clamping rods under the action of threaded transmission, meanwhile, the outer wall of the rotating sleeve extrudes clamping rod clamping arms to compress, close or elastically open, and clamping and loosening of the intervertebral motion retaining device by the clamping instrument are achieved.

Preferably, the clamping rod runs through the rotating sleeve, and is matched with the rotating sleeve through threaded connection, and when the clamping rod is fixed, the rotating sleeve rotates and moves along the axial direction of the clamping rod through the threaded connection effect, so that the motion transmission between the clamping rod and the rotating sleeve is realized.

Preferably, the tail end of the clamping rod is inserted into the holding handle, and the fixing pin fastens the clamping rod and the holding handle through a pin hole on the outer surface of the holding handle, so that relative motion does not exist between the clamping rod and the holding handle.

Preferably, the clamping rod is composed of a clamping arm, a clamping hook, a crescent buckling block, a cylindrical elastic deformation receiving hole, a clamping rod body, a threaded connection section, a clamping rod fixing section and a pin hole, wherein the clamping arm is provided with a V-shaped longitudinal cutting groove at the rear part, the V-shaped longitudinal cutting groove is formed in the front end of the clamping arm, the clamping hook is in an inner encircling mode in the front end of the clamping arm, the crescent buckling block is positioned at the upper end and the lower end of a gap between the clamping hook and the clamping arm, the cylindrical elastic deformation receiving hole is formed in the tail end of the V-shaped longitudinal cutting groove, the clamping rod body is behind the receiving hole, the threaded connection section is consistent with the clamping rod body in outer diameter size at a certain distance from the tail end of the clamping rod, the clamping rod fixing section is equal to the outer diameter size of the threads at the tail part of the clamping rod, and the pin hole is formed in the fixing section.

Preferably, the rotating sleeve comprises an opening cavity for opening and contracting the clamping arm, a passage cavity adjacent to the opening cavity and having an outer diameter smaller than that of the opening cavity, a tail internal thread cavity adjacent to the passage cavity and having a thread major diameter equal to that of the passage cavity, and a torque clamping section having a spline-shaped tail cross section.

Preferably, the shape of the holding handle is in a bamboo joint shape, a clamping rod embedding cavity is arranged in the front end of the holding handle, and a pin hole from the outer surface of the holding handle to the embedding cavity is formed in the middle of the first bamboo joint.

The invention also adopts a technical scheme that: a method of implanting a positionable implantation instrument for an intervertebral motion preservation device is provided, comprising the steps of:

the method comprises the following steps: installing an instrument movement transmission part, keeping the rotary sleeve still, inserting the tail part of the clamping rod into the rotary sleeve along the direction from the opening cavity of the rotary sleeve to the threaded cavity until the threaded connection section of the clamping rod is contacted with the threaded cavity of the rotary sleeve, rotating the rotary sleeve at the moment, and gradually enabling the clamping rod to enter the rotary sleeve under the action of threaded connection transmission until the clamping rod clamping arm is contacted with the outer wall of the sleeve, so that the installation of the clamping rod and the rotary sleeve is finished, and at the moment, relative rotation and axial movement can be realized between the rotary sleeve and the clamping rod;

step two: installing a holding handle, inserting the tail fixing section of the clamping rod into the bottom of the embedding cavity of the holding handle, rotating the holding handle to ensure that a pin hole on the clamping rod is overlapped with a pin hole on the holding handle, inserting a fixing pin, and fixing the clamping rod and the holding handle together to finish the assembly of the implantation instrument;

step three: the intervertebral motion retaining device is clamped and implanted, the clamping handle is firstly grasped to ensure that the clamping handle is static, then the rotating sleeve is rotated to enable the rotating sleeve to spirally retreat backwards along the clamping rod until the clamping arm of the clamping rod is completely opened, then the clamping hook is inserted into the tail end of the opening area of the upper bone fracture plate and the lower bone fracture plate of the intervertebral motion retaining device, the rotating sleeve is reversely rotated, the rotating sleeve is spirally advanced forwards along the clamping rod until the clamping arm is closed and clamped inwards under the extrusion action of the rotating sleeve, the clamping hook enters the clamping area, the buckling block enters the buckling area and is vertically overlapped with the limiting block in the longitudinal direction, at the moment, the intervertebral motion retaining device is firmly clamped by an implanting instrument, the whole intervertebral motion retaining device is implanted into a preset area in an operation by holding the implanting instrument, and the clamping and the implanting of the intervertebral motion retaining device are completed;

step four: loosening the intervertebral motion retention device, withdrawing the implantation instrument, rotating the rotary sleeve, and the rotary sleeve retreats along the clamping rod spiral until the clamping arm is not squeezed by the rotary sleeve any more, the elastic expansion and the clamping hook return to the expansion area, so that the implantation instrument can be drawn out, and the implantation of the intervertebral motion retention device is completely completed.

The invention has the beneficial effects that:

1. the intervertebral motion retention device has the following beneficial effects:

(1) the invention adopts a highly bionic structural design, and based on measurement, analysis and research on 2000 cases of healthy national spine MRI images, ensures that the sagittal plane profiles and footprint plane profiles of the upper and lower bone grafting plates can be better matched with the appearance of a human vertebral bone, and the lower bone grafting plate is more uniquely provided with an outer edge oblique cutting plane or an arc for protecting the uncinate joint.

(2) The clamping grooves of the upper and lower bone fracture plates are entirely positioned in the bone fracture plates, namely, an embedded design is adopted, after the clamping hooks of the clamping instrument enter the clamping grooves to be clamped, the thickness of the upper and lower bone fracture plates of the upper intervertebral motion retaining device is additionally restrained, the intervertebral motion retaining device is ensured not to move in the vertical and horizontal directions, and the serious defects of loose, displacement, separation and the like of a product caused by infirm clamping of a traditional product and an implantation process can be effectively avoided.

(3) The clamping groove structure of the upper and lower bone fracture plates is arranged on the inner side of the rear end face of the bone fracture plate, and compared with the design that other intervertebral motion retention products place the clamping grooves on the left and right side faces of the products, when the intervertebral motion retention device is clamped and loosened, all directions of an implanted instrument do not exceed the size range of the intervertebral motion retention device, the space of an operation window required in the operation process can be effectively reduced, the operation difficulty of a doctor can be effectively reduced through a smaller operation window, the generated operation incision is smaller, and the operation healing time can be effectively reduced.

2. The positioning type implantation instrument of the intervertebral motion retaining device has the following beneficial effects:

(1) according to the intervertebral motion retaining device, the intervertebral motion retaining device is clamped by the implanting instrument and is sent to the intervertebral motion retaining device for pre-implantation, implantation and release of the intervertebral motion retaining device can be completed only by rotating the rotating sleeve, and additional surgical instrument assistance and additional surgical operation steps are not needed.

(2) The clamping and stretching device for the intervertebral motion retention device is clamped and stretched by the rotating sleeve rotating along the clamping rods and advancing, and is different from the clamping and stretching device for the intervertebral motion retention device in which the clamping rods axially displace to achieve clamping and stretching.

(3) The rotary sleeve is provided with a spline type torque clamping section which accords with the palm holding width of a human body and is matched with a holding handle which is in a bamboo joint shape in a shape of profiling design and can be firmly held by four fingers for use, the bamboo joint type holding handle is held by one hand in an operation to determine the implantation direction of the intervertebral motion retaining device, and a thumb and a forefinger and a middle finger of the other hand are used for providing rotary power to drive the sleeve to spirally advance and retreat by acting on the spline type torque clamping section, so that the rotary sleeve completely accords with the operation habit of a doctor and simultaneously is convenient for the doctor to operate and use by the profiling structure design.

(4) The clamping rods and the bamboo joint type holding handle are matched together through the pin shaft, so that the two intervertebral motion retaining devices with complex structures can be ensured to conveniently reach the preset processing precision, the installation and the use of an implantation instrument are facilitated, and the defects that the traditional integrated intervertebral motion retaining device is too complex in structure, large in processing difficulty, large in assembly difficulty and the like are overcome.

3. The implantation method of the positioning implantation instrument of the intervertebral motion retaining device has the advantages that:

(1) in the whole process from the initial implantation to the completion of the implantation, the clamping head of the implantation instrument is always positioned in the upper, lower, left and right limit positions of the intervertebral motion retaining device and does not exceed the size range of the intervertebral motion retaining device, so that the opening of an operation window with the size equivalent to that of the intervertebral motion retaining device in the operation process becomes possible, and the defects of large operation window, increased operation difficulty, prolonged operation time, long operation wound healing time and the like in the implantation process of the traditional intervertebral motion retaining device are effectively avoided.

(2) In the invention, after the implantation instrument is placed in the opening area of the clamping grooves of the upper bone fracture plate and the lower bone fracture plate of the intervertebral motion retaining device, the clamping of the intervertebral motion preservation device can be realized by only rotating the rotating sleeve without the need of extending the implantation instrument slightly like the traditional intervertebral motion preservation device, and after the device reaches the preset implantation area, the implantation and release of the intervertebral motion preservation device can be realized only by rotating the rotating sleeve reversely without slightly withdrawing the implantation instrument, the one-step procedure, which requires no additional manipulation by the operating surgeon, reduces the difficulty of implanting the intervertebral motion preservation device during the procedure, and once the intervertebral motion preservation device implantation location is determined, the intervertebral motion retaining device can not move in any direction when being implanted at the intervertebral motion retaining device, so that the accuracy of the implanted position of the intervertebral motion retaining device is improved, and the success rate of the operation can be effectively improved.

Drawings

FIG. 1 is a perspective view of an intervertebral motion preservation device of the present invention assembled with a positioning implantation instrument;

FIG. 2 is a schematic view of the upper bone plate of the intervertebral motion preservation device of the present invention;

FIG. 3 is a schematic view of the inferior bone plate configuration of the intervertebral motion preservation device of the present invention;

FIG. 4 is a schematic view of the positioning insertion instrument member clamping bar configuration of the intervertebral motion preservation device of the present invention;

FIG. 5 is a cross-sectional view of a rotating sleeve arrangement of a positionable implantation instrument member of the intervertebral motion preservation device of the present invention;

fig. 6 is a schematic view of the positioning type implantation instrument holding handle structure of the intervertebral motion retaining device of the invention.

Description of the main component symbols:

intervertebral motion retention device I	Upper bone fracture plate 1	Clamping groove 15	Expanded region 151
				Clamping area 152	Fastening region 153	Stop block 154	Inner liner 2
Nucleus pulposus 3	Lower osteosynthesis plate 4	Holding groove 45	Expanded zone 451
				Clamping region 452	Fastening region 453	Stopper 454	Implanting instrument II
Clamping rod 5	Holding arm 51	Clamping hook 52	Elastic deformation receiving hole 53
				Rotational motion restraint section 54	Threaded connection 55	Fastening block 56	Fixed section 57
Pin hole 58	Rotating sleeve 6	Opening chamber 61	Channel cavity 62
				Internal threaded cavity 63	Torque loading section 64	Grip handle 7	Fitting cavity 71
Pin hole 72	Fixing pin 8

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings:

referring to fig. 1 and 4, an intervertebral motion retaining device and a positioning type implanting instrument and an implanting method thereof are disclosed, wherein the device comprises an intervertebral motion retaining device I and a corresponding implanting instrument II of the device. The intervertebral motion retaining device I consists of an upper bone fracture plate 1, a lining 2, a nucleus pulposus 3 and a lower bone fracture plate 4, wherein the lining 2 is nested in the upper bone fracture plate 1, the nucleus pulposus 3 is nested in the lower bone fracture plate 4, and the lining 2 and the nucleus pulposus 3 form a clearance fit type spherical friction pair; the positioning type implantation instrument II comprises a clamping rod 5, a rotating sleeve 6, a holding handle 7 and a fixing pin 8, wherein the clamping rod 5 penetrates through the inner cavity of the rotating sleeve 6 and is in threaded connection with the rear part of the inner cavity of the rotating sleeve 6, the clamping rod 5 and the holding handle 7 are fixedly connected through the pin, when the rotating sleeve 6 rotates, the rotating sleeve can axially advance or retreat along the clamping rod 5 under the action of threaded transmission, and meanwhile, the outer wall of the rotating sleeve 6 extrudes a clamping rod clamping arm 51 to generate compression closing or elastic opening, so that the clamping and loosening of the intervertebral motion retaining device I by the clamping instrument II are realized; whole implantation process puts in place one step, and intervertebral motion retention device I sends the predetermined district of implanting back, and whole implantation instrument II need not additionally adjust the removal again, only needs to rotate rotatory sleeve 6, just can accomplish intervertebral motion retention device I and implant and release, effectively reduces the intervertebral motion retention device and implants the degree of difficulty, simplifies the operation procedure.

Referring to fig. 2 and 3, the left side and the right side of the rear end of the bone plate 1 on the intervertebral motion retaining device i are provided with clamping groove systems 15, each clamping groove system 15 is composed of an opening region 151, an inward concave clamping region 152, a fastening region 153 and a limiting block 154, the opening region 151, the clamping region 152 and the fastening region 153 are communicated together, a certain thickness is reserved between the opening region 151 and the upper surface of the upper bone plate 1, the opening region and the clamping region 152 do not completely penetrate through the upper bone plate 1, and the limiting block 154 is located under the fastening region 153, so that the implantation instrument ii can more effectively limit the movement of the intervertebral motion retaining device i in the up-and-down direction; the inferior bone plate 4 is provided with the same symmetrical clamping groove system 45 at the corresponding position, but the stop block 454 is located right above the buckling region 453.

Referring to fig. 1, 4 and 5, in the motion implementation form between the clamping rod 5 and the rotating sleeve 6, the clamping rod 5 penetrates through the rotating sleeve 6, and is matched with the rotating sleeve 6 through a threaded connection, and when the clamping rod 5 is fixed, the rotating sleeve 6 rotates and moves axially along the clamping rod 5 through the threaded connection, so that the motion transmission between the clamping rod 5 and the rotating sleeve 6 is realized.

Referring to fig. 1, 4 and 6, the clamping rod 5 and the grip handle 7 are engaged, the tail end of the clamping rod 5 is inserted into the grip handle 7, and the fixing pin 8 is used for fixing the clamping rod 5 and the grip handle 7 together through the pin hole 72 on the outer surface of the grip handle 7, so that there is no relative movement therebetween.

Referring to fig. 4, the clamping rod 5 is composed of a clamping arm 51 having a V-shaped longitudinal slot on the rear side thereof, a clamping hook 52 encircling inside the front end of the clamping arm 51, a crescent-shaped locking block 56 located on the upper and lower ends of the gap between the clamping hook 52 and the clamping arm 51, a cylindrical elastic deformation receiving hole 53 at the tail end of the V-shaped longitudinal slot, a clamping rod body 54 behind the receiving hole 53, a threaded connection section 55 having a thread major diameter size at a distance from the tail end of the clamping rod 5 and the same as the outer diameter size of the clamping rod body 54, a clamping rod fixing section 57 having a tail outer diameter size and the same as the thread minor diameter size, and a pin hole 58 formed in the fixing section 57.

Referring to fig. 5, the rotating sleeve 6 includes an opening cavity 61 for opening and closing the holding arm 51, a passage cavity 62 adjacent to the opening cavity 61 and having an outer diameter smaller than that of the opening cavity 61, a tail internal thread cavity 63 adjacent to the passage cavity 62 and having a thread diameter equal to that of the passage cavity, and a torque holding section 64 having a spline-shaped tail cross section.

Referring to fig. 6, the shape of the grip handle 7 is designed to be a bamboo joint shape to allow four fingers to firmly grip, a clamping rod engaging cavity 71 is formed in the front end of the grip handle 7, and a pin hole 72 is formed in the middle of the first bamboo joint from the outer surface of the grip handle to the engaging cavity 71.

Referring to fig. 1-6, the intervertebral motion preserving device I and the positioning type implanting instrument II implanting method thereof comprise the following steps: (1) installing an instrument movement transmission part, keeping the rotary sleeve 6 still, inserting the tail part of the clamping rod 5 into the rotary sleeve 6 along the direction from the rotary sleeve opening cavity 61 to the thread cavity 63 until the clamping rod thread connection section 55 is contacted with the rotary sleeve thread cavity 63, rotating the rotary sleeve 6, enabling the clamping rod 5 to gradually enter the rotary sleeve 6 under the action of thread connection transmission until the clamping rod clamping arm 51 is contacted with the outer wall of the sleeve 6, namely completing the installation of the clamping rod 5 and the rotary sleeve 6, and realizing relative rotation and axial movement between the rotary sleeve 6 and the clamping rod 5; (2) installing a holding handle 7, inserting the tail fixing section 57 of the clamping rod into the bottom of the holding handle embedding cavity 71, rotating the holding handle 7 to ensure that the pin hole 58 on the clamping rod 5 is overlapped with the pin hole 72 on the holding handle 7, inserting a fixing pin 8, and fixing the clamping rod 5 and the holding handle 7 together, namely completing the assembly of the implantation instrument II; (3) the intervertebral motion retaining device I is clamped and implanted, firstly, the clamping handle 7 is grasped to ensure that the clamping handle 7 is static, then the rotating sleeve 6 is rotated to lead the rotating sleeve to spirally retreat backwards along the clamping rod 5 until the clamping rod clamping arms 51 are completely opened, then the clamping hooks 52 are inserted into the tail ends of the

opening areas

151 and 451 of the upper and lower bone fracture plates 1 and 4 of the intervertebral motion retaining device, the rotating sleeve 6 is reversely rotated, the rotating sleeve 6 is spirally advanced forwards along the clamping rod 5 until the clamping arms 51 are closed and clamped inwards under the extrusion action of the rotating sleeve 6, the clamping hooks 52 enter the

clamping areas

152 and 452, the buckling blocks 56 enter the

buckling areas

153 and 453 and the

limiting blocks

154 and 454 to be vertically overlapped in the longitudinal direction, at the moment, the intervertebral motion retaining device I is clamped by the implantation instrument II, the whole intervertebral motion retaining device I is firmly implanted into the predetermined area of the operation by the clamping implantation instrument II, namely, the clamping and the implantation of the intervertebral motion retaining device I are completed; (4) loosening intervertebral motion retention device I, withdrawing from implantation instrument II, rotating rotatory sleeve 6, rotatory sleeve 6 is along the spiral backspace of clamping rod 5, and until centre gripping arm 51 no longer receives the extrusion of rotatory sleeve 6, elasticity is opened, clamping hook 52 gets back to and opens out

district

151, 451, can take out implantation instrument II, thoroughly accomplishes the implantation of intervertebral motion retention device I.

The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A positioning type implantation instrument of an intervertebral motion retention device comprises a clamping rod and a rotating sleeve, wherein the clamping rod penetrates through the rotating sleeve and is matched with the rotating sleeve through threaded connection; when the rotary sleeve rotates, the rotary sleeve can axially move forwards or backwards along the clamping rod under the action of thread transmission, so that the motion transmission between the clamping rod and the rotary sleeve is realized, and meanwhile, the outer wall of the rotary sleeve extrudes the clamping arm of the clamping rod to generate compression closure or elastic opening, so that the clamping and loosening of the intervertebral motion retaining device by a clamping instrument are realized; the positioning type implantation instrument is characterized by comprising a clamping rod, a rotating sleeve, a holding handle and a fixing pin, wherein the tail end of the clamping rod is inserted into the holding handle, and the fixing pin fastens the clamping rod and the holding handle through a pin hole on the outer surface of the holding handle, so that relative motion does not exist between the clamping rod and the holding handle; the shape of the holding handle is in a bamboo joint shape in a copying design, a clamping rod embedding cavity is arranged in the front end of the holding handle, and a pin hole from the outer surface of the holding handle to the embedding cavity is formed in the middle of the first bamboo joint;

the clamping rod is composed of a clamping arm, a clamping hook, a crescent buckling block, a cylindrical elastic deformation accepting hole, a clamping rod body, a threaded connection section, a clamping rod fixing section and a pin hole, wherein the V-shaped longitudinal cutting groove is formed in the rear of the clamping arm, the V-shaped longitudinal cutting groove is formed in the front end of the clamping arm, the clamping hook is in an inner encircling mode in the front end of the clamping arm, the crescent buckling block is located at the upper end and the lower end of a gap between the clamping hook and the clamping arm, the cylindrical elastic deformation accepting hole is formed in the tail end of the V-shaped longitudinal cutting groove, the threaded connection section is located behind the accepting hole, the thread major diameter size of the clamping rod at a certain distance from the tail end of the clamping rod is identical to the outer diameter size of the clamping rod body, the clamping rod fixing section is located, the tail outer diameter size of the clamping rod is equal to the thread minor diameter size, and the pin hole is formed in the fixing section.

2. The apparatus of claim 1, wherein the rotating sleeve comprises an opening cavity with a certain length at the front end for the holding arm to open and contract, a channel cavity adjacent to the opening cavity and having an outer diameter smaller than that of the opening cavity, a tail inner thread cavity adjacent to the channel cavity and having a thread diameter equal to that of the channel cavity, and a torque holding section having a spline-shaped tail cross section.