CN101347350B

CN101347350B - External member flexible cable vertebra fixing device

Info

Publication number: CN101347350B
Application number: CN2007101191237A
Authority: CN
Inventors: 叶中权
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-16
Filing date: 2007-07-16
Publication date: 2010-07-21
Anticipated expiration: 2027-07-16
Also published as: CN101347350A

Abstract

The invention relates to a suite flexible cable spine fixing device, in particular to a suite flexible cable spine fixing device which is provided with a flexible cable which can be covered into an inflexible section or an uncovered section by a plurality of suites and has original flexibility, and every two adjacent contact ends of the suites are connected by a variable included angle. The device comprises: a flexible cable; a plurality of sleeve members, which are sleeved on the flexible cable; and a plurality of fixed seat bone nails, a fixed seat end has a screw hole and a U-shaped groove, the flexible cable is put into the U-shaped groove movably after being sheathed in the external member, and a screw fastener is screwed in the screw hole, and the external member and the flexible cable are propped against and fixed on the fixed seat bone nails; the method is characterized in that: the two adjacent contact ends of the sleeve are connected with each other by a variable included angle.

Description

External member flexible cable spine fixing apparatus

Technical field

The invention relates to a kind of external member flexible cable spine fixing apparatus, be meant especially a kind of have to be covered by a plurality of external members do not have a flexible section, or not overlay segment have original flexible flexible cable, and the adjacent in twos contravention of described external member is the external member flexible cable spine fixing apparatus that a variable angle joins.

Background technology

Traditional spinal cord injury is if fix with nail and connecting rod, all be with a titanium alloy or stainless stationary links, be connected in conjunction with the vertebra nail in the plural number implantation vertebra joint, and firmly hard mode is linked the fixing impaired vertebral segments that need be fixed by force.

But it is fixing by force to hard mode so firmly, except that suitable stress relieving can't be provided, also can't produce fine motion to impaired vertebral segments stimulates, help damaged part stable to quicken the hypertrophy sclerotin, allow the patient be in a kind of state that can only lie in bed or support with back of the body frame, restore intravertebral part original function that can't be suitable as quickly as possible for a long time.

And for example fruit is simple only links between each nail with the cable type connecting rod, two kinds of subject matters are then arranged, the firstth, the cable type connecting rod is too firm, then be as good as with aforementioned conventional titanium or rustless steel vertical bar shaped connecting rod, second if this cable type connecting rod is too soft, then be that suitable support force can't be provided, and this cable easy deformation.Moreover, as if overcoat one stay pipe on this cable, then have the characteristic that this cable of forfeiture can provide flexibility, elasticity or flexibility again, so then be as good as with using general connecting rod again.

Summary of the invention

Therefore, the simple workaround of described problem, be to provide suitable flexible and elasticity with a flexible cable, a plurality of external members are placed on this flexible cable, so that fixing, support function to be provided, and to separate and provide flexible section or inflexible section, the adjacent in twos contravention of described external member is that a variable angle joins, keeping the flexible curvature of this flexible cable, and, produce external member flexible cable spine fixing apparatus with fixing and flexible effect to plant the vertebra nail that is fixed in the vertebral segments.

A purpose of the present invention is to provide a kind of external member flexible cable spine fixing apparatus.

Another object of the present invention is to provide a kind of flexible cable that comprises, a plurality of external members, many holder nails, and the external member flexible cable spine fixing apparatus of the sheathed combination of a plurality of screw tightenings.

Another purpose of the present invention is to provide a kind of described external member to coat, and be fixed on this flexible cable, this flexible cable is distinguished the inflexible section of coating, and the former flexible section that does not coat, and the adjacent in twos contravention of described external member is that a variable angle joins, described nail is with a Centesis instrument assembly, respectively plant to be fixed in the vertebral segments, and each supports with a screw tightening spiral shell and fixes the external member flexible cable spine fixing apparatus that this nail and the flexible cable of this external member and this make up.

A further object of the present invention is to provide a kind of described external member to can be a spheroid, cylinder or lamellar body, the joint end is the sphere or the angle conical surface in twos, or one recessed one protruding contacting such as relative matrix face with it, this flexible cable can be a multiply stranded cable, can directly penetrate the external member flexible cable spine fixing apparatus between this external member.

And the present invention to also have a purpose to be to provide a kind of this holder nail be a holder and the movable fit mutually of a bulb nail, this holder nail is to be provided with two oblique perforation that communicates and slotted eyes, this flexible cable combines with this external member and inserts or penetrate in this slotted eye, and this screw tightening is screwed into by another perforation or slanted apertures and pushes against fixed external member flexible cable spine fixing apparatus.

So a kind of external member flexible cable spine fixing apparatus of the present invention includes:

One flexible cable;

A plurality of external members are set on this flexible cable; And

Many holder nails, one holder end is directly to being provided with a screw fixed hole, reach and laterally wear a U type groove, after this flexible cable is linked in this external member, movable this U type groove of inserting, and be screwed together in this screw fixed hole with a screw tightening, this external member is pushed against together with this flexible cable be fixed on this holder nail;

It is characterized in that: the flexible cable section that described external member coats, has inflexible, and this flexible cable that does not coat section has original flexible, the adjacent in twos contravention of described external member is that a variable angle joins, and between described holder nail, be connected by flexible cable with described external member fit.

Above-mentioned external member flexible cable spine fixing apparatus, the wherein said external member contravention that joins is that a sphere end contacts relatively, and described external member becomes variable angle to join with this sphere end.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a cylinder, and its two ends are made as this sphere end and contact relatively.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a spheroid, reaches adjacent contact in twos.

Above-mentioned external member flexible cable spine fixing apparatus, the wherein said external member contravention that joins is that a sphere end contacts with a relative shape concave ends, and described external member becomes variable angle to join so that this sphere end is adjacent with this concave ends.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a cylinder, and the one end is made as this sphere end, and the other end then is this concave ends, reaches adjacent contact in twos.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a recessed lamellar body, and the one side is this sphere end convex surface, and the another side then is this concave ends relatively, reach adjacent contact in twos.

Above-mentioned external member flexible cable spine fixing apparatus, the wherein said external member contravention that joins is that a plane pyramid end contacts relatively, and described external member becomes variable angle to join with this plane pyramid end.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a cylinder, and its two ends are made as this plane pyramid end and contact relatively.

Above-mentioned external member flexible cable spine fixing apparatus, the wherein said external member contravention that joins is that a plane pyramid end contacts with a relative shape concave ends, and described external member becomes variable angle to join so that this plane pyramid end is adjacent with this concave ends.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a cylinder, and the one end is made as this plane pyramid end, and the other end then is this concave ends, reaches adjacent contact in twos.

Above-mentioned external member flexible cable spine fixing apparatus, wherein said external member further can be a recessed lamellar body, and the one side is this plane pyramid end convex surface, and the another side then is this concave ends relatively, reach adjacent contact in twos.

Above-mentioned external member flexible cable spine fixing apparatus, for being provided with slit perforation, this flexible cable passes this perforation, and this slit makes this external member elastic jacket on this flexible cable on the wherein said external member.

Above-mentioned external member flexible cable spine fixing apparatus, wherein the one or both ends of this flexible cable each further be provided with a resistor, when this flexible cable one end was stressed, the resistor of this other end was then replaced this nail holder end, stoped this flexible cable to continue displacement.

Above-mentioned external member flexible cable spine fixing apparatus, wherein this flexible cable and this resistor can be one of the forming.

Above-mentioned external member flexible cable spine fixing apparatus, wherein this screw tightening bottom surface convexes with a salient point, can replace this flexible cable and be fixed on this holder nail.

Above-mentioned external member flexible cable spine fixing apparatus, wherein this flexible cable further is a multiply stranded cable, described external member wears with its perforation and is coated on this flexible stranded cable.

Above-mentioned external member flexible cable spine fixing apparatus, wherein this holder nail further is a holder and the movable fit mutually of a nail, this holder is provided with a spiral shell and bores a hole admittedly, this nail has a threaded end and a bulb end, this threaded end passes this spiral shell and bores a hole admittedly, this bulb end then is resisted against in this holder, and this screw tightening is movable to be screwed in this spiral shell is bored a hole admittedly, pushes against the combination of fixing this holder, nail and this flexible cable.

Above-mentioned external member flexible cable spine fixing apparatus, wherein the screw fixed hole of this holder nail further is a slanted apertures, and be provided with in addition one with the oblique fit slotted eye that communicates of this screw fixed hole, this flexible cable is inserted this holder end by this fit slotted eye, and this screw tightening then screws tight through this slanted apertures and fixes this holder nail and this flexible cable.

Above-mentioned external member flexible cable spine fixing apparatus, wherein on this holder nail, communicating with this screw fixed hole is provided with one in addition and wears and close the hole, and this flexible cable is worn by this and is closed the hole and penetrate this holder end, and this screw tightening then screws tight fixes this holder nail and this flexible cable.

Above-mentioned external member flexible cable spine fixing apparatus, it further comprises a plurality of conversion kit, can be set on this flexible cable, this conversion kit has the switching part of a pars intermedia and both sides extension, this flexible cable is linked in this conversion kit, the screw fixed hole that can meet this holder end, and the then movable and described external member variable-angle of described switching part contacts.

Above-mentioned external member flexible cable spine fixing apparatus, it further comprises a Centesis instrument assembly, have a bending conduit and a flexible needle, this flexible needle is a cable pointed device, can be installed on along the curvature of this bending conduit in this bending conduit, this Centesis instrument assembly can be by external puncture and the described flexible cable of guiding installing and external member or the conversion kit location to described holder nail etc.

Defined relative position among the present invention as upper and lower, side etc., is meant hand-held this external member flexible cable spine fixing apparatus entire combination, with reference to the user cephalad direction is last, otherwise the foot direction is for down, and with respect to the periphery of these upper and lower two ends, then is the side.

Description of drawings

Fig. 1 a and Fig. 1 b are the preferred embodiment sketch map of the present invention's one external member flexible cable spine fixing apparatus.

Fig. 1 c is the flexible cable preferred embodiment of the integrally formed resistor of one of this an external member flexible cable spine fixing apparatus sketch map.

Fig. 2 is one of this external member flexible cable spine fixing apparatus conversion kit preferred embodiment sketch map.

Fig. 3 a and Fig. 3 b are sphere end preferred embodiment sketch map for the external member two ends of this external member flexible cable spine fixing apparatus.

Fig. 3 c to Fig. 3 e is that sphere, the other end are relative concave surface for external member one end of this external member flexible cable spine fixing apparatus, and this external member length preferred embodiment sketch map.

Fig. 3 f and Fig. 3 g are plane pyramid end for the external member two ends of this external member flexible cable spine fixing apparatus, or an end is that plane pyramid, the other end are relative concave ends preferred embodiment sketch map.

Fig. 4 to Fig. 6 is the various preferred embodiment sketch maps of the holder nail of this external member flexible cable spine fixing apparatus.

Fig. 7 is a preferred embodiment sketch map in implantation one vertebral segments of this external member flexible cable spine fixing apparatus.

Fig. 8 a and 8b are a Centesis instrument assembly and the actual preferred embodiment sketch map that uses of this external member flexible cable spine fixing apparatus.

Reference numeral

10. external member flexible cable spine fixing apparatus 20. flexible cables

30. external member 301. slits perforation

302. sphere end 31. conversion kit

311. pars intermedia 312. switching parts

32. external member 321. sphere ends

322. relative shape concave ends 33. external members

331. plane pyramid end 34. external members

341. plane pyramid end 342. relative shape concave ends

40. holder nail 41. holder ends

411. screw fixed hole 412.U type groove

42. holder 421. spiral shells are bored a hole admittedly

43. nail 431. threaded ends

432. bulb end 44. holder ends

441. oblique screw fixed hole 442. fit slotted eyes

45. holder end 451. screw fixed holes

Close hole 50. screw tightenings 452. wear

51. salient point 52. another screw tightenings

60. resistor 61. integrally formed resistors

71. vertebral segments 72. vertebral segments

80. Centesis instrument assembly 81. bending conduits

82. flexible needle 90. piping tools

91. side fluting

The specific embodiment

For further specifying the present invention, cooperate graphic explanation embodiment as follows with preferred embodiment now:

Among Fig. 1 a to Fig. 1 c, first kind of preferred embodiment of the present invention's one external member flexible cable spine fixing apparatus 10 includes the external member 30 of a flexible cable 20, a plurality of first forms, a plurality of (showing one among the figure) conversion kit 31, many holder nails 40, a plurality of screw tightenings 50, and a plurality of resistors 60.

This flexible cable 20 is a multiply stranded cable, has material itself and the structural elasticity and flexible that tangles, and in crooked or compression, when upholding, this flexible cable 20 can produce the distortion of appropriateness, the effect of the stress that is applied with response.Described external member 30 is provided with slit perforation 301, and this flexible cable 20 passes the bore a hole perforated portion of 301 central authorities of this slit, and the slit part of this slit perforation 301, makes described external member 30 elastic jackets on this flexible cable 20.

And described conversion kit 31 has a pars intermedia 311 in addition, itself and aforesaid described external member 30 functions are similar, can be set on this flexible cable 20, insert in this holder nail 40, in addition its both sides one is extended with a switching part 312, can with described external member 30 moving phase contacts.Described holder nail 40 then has a holder end 41, and it is directly to being provided with a screw fixed hole 411, and laterally wears a U type groove 412, and these flexible cable 20 covers are should external member 30, or after this conversion kit 31, promptly movable inserting in this U type groove 412.This screw tightening 50 then is screwed together in this screw fixed hole 411, pushes against the combination of fixing this holder nail 40 and this flexible cable 20 and this external member 30 or conversion kit 31.

Described conversion kit 31 is extended 30 of each external members of contact, and moving phase 20 sections on this flexible cable of being coated that contacts of described external member 30 and external member 30, because of described external member 30 hard and replace mutually, just make this flexible cable 20 be subjected to this external member 30 restrictions, and have the characteristic that can not be compressed flexural buckling.

Described again external member 30 does not coat this flexible cable 20 of section, then because of not having supporter or limiter (external member 30 as described), so have this flexible cable 20 originally be elongated the flexible of extension or compression.And the adjacent in twos contravention or the face of described again external member 30 are that a variable angle joins, and as sphere sphere being contacted is variable angle.Reach 40 of described holder nails, the flexible cable 20 with described external member 30 fits is connected.

And the one or both ends of this flexible cable 20, each is the described resistor 60 of installing further, during so as if stressed the pullling of these flexible cable 20 1 ends, and the resistor 60 of its other end, then can be because of replacing the holder end 41 of this nail 40, and stop this flexible cable 20 or other fixation kit continuation displacement.Again or described flexible cable 20 when making for special substance, as the PEEK human body can compatible plastic material the time, but this resistor 61 of the another kind of pattern of an end direct forming of this flexible cable 20 then, its functional effect also with.These screw tightening 50 bottom surfaces then convex with a salient point 51, can replace this flexible cable 20 in conjunction with this external member 30 or this conversion kit 31, and more held stationary on this holder nail 40.

Among Fig. 2, this conversion kit 31 is as Reference numeral, has a pars intermedia 311, itself and aforesaid described external member 30 are similar function, can be set on this flexible cable 20, what shape was more compatible inserts in this holder nail 40, and the both sides one is extended with the switching part 312 of a fillet or the straight angle, can with described external member 30 moving phase contacts.

Among Fig. 3 a and Fig. 3 b, described external member 30 is first kind of preferred embodiment, variable angle between it the contacts mode that contacts, if when being a sphere end 302 relative contacts, then described external member can be a cylinder external member, its two ends are made as this sphere end 302 and contact relatively, or can be a spheroid external member, and adjacent contact in twos.

Again among Fig. 3 c to Fig. 3 e, described external member 32 is second kind of preferred embodiment, its intermediary variable angle mode that contacts, if be a sphere end 321 when contacting with the concave ends 322 of a relative shape, described external member 32 can be a microscler cylinder, and its length is not limit, one end is made as this sphere end 321, the other end then is this concave ends 322, and 321 pairs of sphere ends 321 of sphere end in twos, or 321 pairs of concave ends 322 adjacent contact of sphere end.Or described microscler cylinder external member 32 is very short when thin, then can be a recessed lamellar body, and the one side is this sphere end convex surface 321, and then the another side is this concave ends 322 relatively, and contacts like scale for adjacent in twos.

And among Fig. 3 f and Fig. 3 g, described external member 33, external member 34 third and fourth kind preferred embodiment, the mode that contacts of variable angle therebetween, if when only being a plane pyramid end 331 relative contacts, then described external member 33 can be a cylinder external member 33, and its two ends are made as this plane pyramid end 331 and contact relatively.Or the variable angle of 34 of described external members to contact be that a plane pyramid end 341 is when contacting with a relative shape concave ends 342, described external member 34 also can be a cylinder external member 34, the one end is made as this plane pyramid end 341, and the other end then is this concave ends 342, reaches adjacent contact in twos.Or be a recessed lamellar body, the one side is this plane pyramid end convex surface 341, the another side then is this concave ends 342 relatively, reaches adjacent contact in twos.

Among Fig. 4, this holder nail 40 further can be divided into the assembly of a holder 42 and a nail 43 movable fits mutually.

This holder 42 is provided with a spiral shell and bores a hole 421 admittedly, this nail 43 has a threaded end 431 and a bulb end 432, this threaded end 431 passes this spiral shell and bores a hole 421 admittedly, 432 at this bulb end is resisted against in this holder 42, this screw tightening 50 is movable to be screwed in this spiral shell and to bore a hole admittedly in 421, pushes against the combination of fixing this holder 42, nail 43 and this flexible cable 20 and other assembly.

Or among Fig. 5, these holder nail 40 another concrete examples, the screw fixed hole of its holder end 44 further can change a slanted apertures 441 into, and be provided with in addition one with these oblique screw fixed hole 441 oblique fit slotted eyes 442 that communicate, after this flexible cable 20 is inserted this holder end 44 by this fit slotted eye 442, this screw tightening that meets 52 then screws tight through this slanted apertures 441 and fixes this holder nail 40 and this flexible cable 20 and other assembly.

And among Fig. 6, on the holder end 45 of these holder nail 40 another concrete examples, communicate with this screw fixed hole 451 and to be provided with one in addition and to wear and close hole 452, this flexible cable 20 is worn by this and is closed hole 452 and penetrate this

holder end

45, and 52 of this screw tightenings screw tight fixes this holder nail 40 and this flexible cable 20 and other assembly.

Among Fig. 7, described a plurality of external member flexible cable spine fixing apparatus 10, when implanting in the

vertebral segments

71,72 respectively, described external member 30 has 20 sections on this flexible cable of coating, and then for having inflexible, and this flexible cable 20 that coats section has original flexible, reach 30 of described adjacent in twos external members, can reach 40 of described holder nails because of bending change adjacent angle, have being connected of this flexible cable 20.

Among Fig. 8 a and the 8b, this external member flexible cable spine fixing apparatus 10, it further comprises a Centesis instrument assembly 80, and in addition many nails and screw tightening are implanted the piping tool 90 of usefulness, this Centesis instrument assembly 80 has a bending conduit 81 and a flexible needle 82, this flexible needle 82 is a cable pointed device, have flexible flexible, can be installed in this bending conduit 81 along the curvature of this bending conduit 81, this Centesis instrument assembly 80 can be by external puncture, through the piping tool 90 sides fluting 91 that described nail and screw tightening are implanted, guiding described flexible cable 20 of installing and external member 30 or conversion kit 31 are to the location of described holder nail 40 etc.

Claims

1. A kit flexible cable spinal fixation device, comprising:

a flexible cable;

a plurality of sets threaded over the flexible cable; and

A plurality of fixation seat bone nails, the end of the fixation seat is provided with a screw fixing hole in the straight direction, and a U-shaped groove is arranged in the transverse direction. The screw is screwed into the screw hole, and the sleeve and the flexible cable are tightly fixed on the bone screw of the fixing seat;

It is characterized in that: the flexible cable section covered by the sleeve is inflexible and the flexible cable of the uncoated section has original flexibility, and the two adjacent contact ends of the sleeve are a variable The included angles are connected, and the bone nails of the fixing seats are connected with the flexible cable fitted with the sleeve.

2. The set of flexible cable spinal fixation device according to claim 1, wherein the contacting end of the set is a spherical end in relative contact, and the set is connected at a variable angle with the spherical end.

3. The set of flexible cable spinal fixation device as claimed in claim 2, wherein said set is further a cylinder, the two ends of which are arranged to be in contact with the spherical end.

4. The set of flexible cable spinal fixation device according to claim 2, wherein said set is further a sphere, two of which are adjacent to each other.

5. The set of flexible cable spinal fixation device as claimed in claim 1, wherein said set of contacting end is a spherical end contacting with a concave end of opposite shape, said set of said set with the spherical end and the concave end Adjacent to each other with a variable angle.

6. The set flexible cable spinal fixation device as claimed in claim 5, wherein said set is further a cylinder, one end of which is set as the spherical end, and the other end is the concave end, and two adjacent contacts thereof .

7. The set flexible cable spinal fixation device as claimed in claim 5, wherein said set is further a concave body, one side of which is the convex surface of the spherical end, and the opposite side is the concave end, and the two sides two adjacent contacts.

8. The set flexible cable spinal fixation device as claimed in claim 1, wherein the contact end of the set is a plane pyramid end in relative contact, and the set is in a variable angle with the plane pyramid end. catch.

9. The set of flexible cable spinal fixation device according to claim 8, wherein said set is further a cylinder, the two ends of which are arranged to be in contact with the planar pyramid ends.

10. The set flexible cable spine fixation device as claimed in claim 1, wherein the contact end of the set is that a plane pyramid end is in contact with a concave end of an opposite shape, and the set is connected with the plane pyramid end Adjacent to the concave end to form a variable angle to meet.

11. The set flexible cable spinal fixation device as claimed in claim 10, wherein said set is further a cylinder, one end of which is set as the plane pyramid end, and the other end is the concave end, and its two phases adjacent contact.

12. The set flexible cable spinal fixation device as claimed in claim 10, wherein said set is further a concave body, one side of which is the convex surface of the plane pyramid end, and the opposite side is the concave end, Two of them are in adjacent contact.

13. The set flexible cable spine fixation device as claimed in claim 1, wherein said set is provided with a slit perforation, the flexible cable passes through the perforation, and the slit makes the set elastic collet fit on the flexible cable.

14. The set of flexible cable spine fixation device as claimed in claim 1, wherein one or both ends of the flexible cable are further provided with a stopper, when one end of the flexible cable is stressed, the stopper at the other end will Butt against the end of the bone screw fixing seat to prevent the flexible cable from further displacement.

15. The kit of flexible cable spinal fixation device of claim 14, wherein the flexible cable is integrally formed with the blocking member.

16 . The spinal fixation device with a set of flexible cables as claimed in claim 1 , wherein a convex point protrudes from the bottom surface of the screw member, against which the flexible cable is combined with the set and fixed on the bone screw of the fixing base. 17 .

17. The set of flexible cable spinal fixation device according to claim 1, wherein the flexible cable is further a multi-strand cable, and the set is wrapped on the multi-strand cable with its perforated sheath.

18. The set of flexible cable spinal fixation device according to claim 1, wherein the bone screw of the fixing base is further fitted with a fixing base and a bone screw movably, the fixing base is provided with a screw hole, and the bone screw has A screw end and a ball head end, the screw end passes through the screw hole, and the ball end is against the fixing seat, and the screw member can be screwed into the screw hole to firmly fix the A combination of a fixing seat, a bone nail and the flexible cable.

19. The set of flexible cable spinal fixation device according to claim 1, wherein the screw hole of the bone screw in the fixation seat is further an oblique perforation hole, and is additionally provided with a fitting slot that communicates obliquely with the screw fixation hole , the flexible cable is put into the end of the fixing seat through the fitting slot, and the screw is screwed through the oblique perforation to fix the fixing seat bone nail and the flexible cable.

20. The set of flexible cable spinal fixation device as claimed in claim 1, wherein on the bone screw of the fixation base, there is another piercing hole communicated with the screw fixing hole, and the flexible cable is passed through the piercing hole into the fixation hole. The seat end, the screw member is screwed to fix the fixed seat bone screw and the flexible cable.

21. The flexible cable spinal fixation device according to claim 1, further comprising a plurality of conversion kits threaded on the flexible cable, the conversion kits have a middle part and two extending transition parts, The flexible cable is sheathed in the conversion kit, and conforms to the screw hole at the end of the fixing seat, and the transfer part can be moved to contact with the kit at a variable angle.