CN217488800U

CN217488800U - Jaw bone tractor with detachable handle

Info

Publication number: CN217488800U
Application number: CN202121380471.1U
Authority: CN
Inventors: 孙斌; 黄佳敏; 黄杰
Original assignee: Ningbo Cibei Medical Treatment Appliance Co ltd
Current assignee: Ningbo Cibei Medical Treatment Appliance Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-09-27
Anticipated expiration: 2031-06-21

Abstract

The utility model relates to a jaw bone tractor with a detachable handle, which comprises a traction frame, wherein a guide groove is arranged on the traction frame; fixing a traction plate; the movable traction seat is restrained in the guide groove and is provided with a threaded through hole which penetrates through the guide groove in the axial direction; the movable traction plate is fixed on the movable traction seat; the screw rod is arranged in the guide groove and can rotate around the axis of the screw rod, the front end of the screw rod penetrates out of the traction frame to form a driving end, and the screw rod penetrates through and is in threaded connection with a threaded through hole in the movable traction seat; an adjusting handle; the method is characterized in that: the drive end is sleeved and fixed with a connecting sleeve, the inner end of the adjusting handle is inserted into and connected with the connecting sleeve through the detachable connecting structure, and after the adjusting handle is connected with the connecting sleeve, the adjusting handle rotates to drive the screw rod to rotate along with the connecting sleeve. Which is a jaw bone tractor with reasonable structure and detachable handle.

Description

Jaw bone tractor with detachable handle

Technical Field

The utility model belongs to the technical field of a medical instrument for oral cavity, jaw surgery and plastic surgery's operation, especially, relate to a handle detachable jaw tractor.

Background

At present, there is a special retractor for jaw bone, which is widely used in oral, maxillofacial or cranial surgery and plastic surgery, and the technical principle of the retractor can be summarized as follows: the soft tissue around the jawbone is firstly cut, after the mandible is completely or incompletely cut, the broken end of the bone is gradually propped open by external force to form a gap, the bone forming capability of the jawbone is induced by traction force, and new bone is continuously formed to fill the gap, so that the aim of prolonging the mandible is fulfilled. The technology utilizes the regeneration potential of organism tissues and can repair bone defects or defect deformities caused by various congenital or acquired reasons.

For example, chinese utility model patent No. ZL95200175.6 (publication No. CN2205709Y) 'a jaw traction extender', chinese utility model patent No. ZL98225259.5 (publication No. CN2341572Y) 'jaw traction extender', and chinese utility model patent No. ZL99234512.x (publication No. CN2378010Y) 'oral cavity lower jaw traction extender' all disclose jaw tractors having the same working principle. All adopt the screw rod as towed drive disk assembly, rotate the adjustment handle during operation and drive the screw rod rotatory, and then drive the removal of activity traction plate.

Present jaw tractor has following defect, expose and be undetachable connection between the screw rod because of adjustment handle, pull the completion back for the last time, jaw tractor still can stay patient's health a period, the handle still exposes the department external this moment, influence patient's appearance, the handle is touched easily in the daily activity to the patient in addition, can arouse patient's discomfort, easily lead to the screw rod to produce simultaneously and deflect towards the orientation that relaxs, generally pull jaw and all adopt two tractors to pull together, if the traction position of one of them tractor changes, can lead to jaw to pull inhomogeneously, the clearance between disconnected bone takes place the skew, finally make the new bone formation sawtooth that produces, seriously influence operation quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a jaw tractor with reasonable structure and detachable handle aiming at the current situation of the prior art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a jaw bone tractor with a detachable handle comprises a traction frame, a jaw bone tractor body and a jaw bone tractor body, wherein a guide groove is formed in the traction frame along the length direction; the fixed traction plate is fixedly arranged relative to the traction frame, and a plurality of first mounting holes for the self-tapping screws to penetrate through are formed in the fixed traction plate; the movable traction seat is restrained in the guide groove and can axially slide, and a threaded through hole which axially penetrates through the movable traction seat is formed in the movable traction seat; the movable traction plate is fixed on the movable traction seat, and a plurality of second mounting holes for the self-tapping screws to penetrate through are formed in the movable traction plate; the screw rod is arranged in the guide groove and can rotate around the axis of the screw rod, the front end of the screw rod penetrates out of the traction frame to form a driving end, and the screw rod penetrates through and is in threaded connection with a threaded through hole in the movable traction seat; an adjusting handle; the method is characterized in that: the drive end is sleeved and fixed with a connecting sleeve, the inner end of the adjusting handle is inserted into and connected with the connecting sleeve through the detachable connecting structure, and after the adjusting handle is connected with the connecting sleeve, the adjusting handle rotates to drive the screw rod to rotate along with the connecting sleeve.

The detachable connecting structure comprises two connecting grooves which are arranged on the peripheral wall of the connecting sleeve at intervals, and a clamping shaft which is radially inserted and fixed at the inner end of the adjusting handle, wherein the two ends of the clamping shaft are provided with the peripheral wall of the adjusting handle in a convex manner, the connecting grooves are provided with a first axial groove part, a transverse groove part and a second axial groove part, the top end of the first axial groove part penetrates through the outer end surface of the connecting sleeve, the top end of the second axial groove part is closed, and the bottom of the first axial groove part is communicated with the bottom of the second axial groove part through the transverse groove part; the clamping shaft can enter from the opening end of the first axial groove part and is clamped into the top of the second axial groove part after passing through the transverse groove part to realize connection; the clamping shaft can move from the top to the bottom of the second axial groove part and slide out from the opening end of the first axial groove part after passing through the transverse groove part, so that the clamping shaft can be detached. The handle can be detached from the connecting sleeve quickly, and the handle can be connected with the connecting sleeve quickly. When in connection, the exposed clamping shaft only needs to enter from the opening end of the first axial groove part and is clamped into the top of the second axial groove part after passing through the transverse groove part to realize connection; when the detachable shaft is detached, the exposed clamping shaft only needs to move from the top to the bottom of the second axial groove part and slide out from the opening end of the first axial groove part after passing through the transverse groove part, so that the detachable shaft is detached.

Further improve, above-mentioned adjustment handle's the inner is equipped with the spring chamber, is equipped with spring and movable sleeve in the spring chamber, it has the bar hole that radially runs through to open on the movable sleeve, and the card axle passes the bar hole on the movable sleeve that is located the spring chamber, the card axle can slide along the bar hole, the movable sleeve can slide in the spring chamber, the spring acts on the movable sleeve and makes it keep moving outward and show the trend in spring chamber, and the movable sleeve that shows out the spring chamber inserts in the connecting sleeve to can support with the interior bottom surface of the outer terminal surface of drive end in the connecting sleeve or connecting sleeve and join in marriage. The setting of spring makes adjustment handle have the axial antedisplacement trend, ensures that exposed card axle blocks all the time at the top of second axial slot part, and adjustment handle is difficult for breaking away from the adapter sleeve.

The back end of the guiding groove is fixed with a first plug, and an accommodating cavity with an opening facing the guiding groove is arranged in the first plug; a second plug is fixed at the front end of the guide groove; the rear end of the screw rod is movably inserted into the accommodating cavity, the front part of the screw rod is provided with an annular blocking shoulder matched with the second plug in a blocking mode, and the front end of the screw rod penetrates out of the second plug to form the driving end. This structure does benefit to the processing of traction frame, conveniently assembles on the traction frame each accessory simultaneously.

Preferably, the guide groove is composed of a circular groove portion located at the lower part and a strip-shaped groove portion located at the upper part, the strip-shaped groove portion is communicated with the circular groove portion, and the maximum radial width of the circular groove portion is larger than the width of the strip-shaped groove portion; the lower part of the movable traction seat is provided with a cylindrical part with the shape matched with the circular groove part, the threaded through hole is arranged on the cylindrical part, the middle part of the movable traction seat is provided with a guide part with the shape matched with the strip-shaped groove part, and the lower end surface of the movable traction seat is placed on the upper end surface of the traction frame. Because of the radial maximum width of the circular groove part is larger than the width of the strip-shaped groove part, the cylindrical part at the lower part of the movable traction seat is restrained in the circular groove part and can only slide back and forth, so that the traction distance can be adjusted more accurately.

In order to conveniently and accurately fix the movable traction plate on the movable traction seat, the middle part of the upper end surface of the movable traction seat is provided with an upward convex fixed column, and the movable traction plate is provided with a fixed hole for inserting and matching the fixed column; the front and rear sides of the upper end face of the movable traction seat are provided with upwards-protruding insertion blocks, and the front and rear sides of the movable traction plate are provided with slots for the insertion blocks to be inserted and matched. The movable traction seat and the movable traction plate are accurately connected through the fixed column, the fixed hole and the positioning matching of the insertion block and the slot, and then the movable traction seat and the movable traction plate are fixed through welding.

The lower end face of the fixed traction plate is provided with a downward convex dowel bar, the shape of the dowel bar is matched with that of the strip-shaped groove portion, and the dowel bar is inserted into the strip-shaped groove portion and then welded and fixed with the first plug. Through the positioning fit of the dowel bars and the strip-shaped groove parts, the fixed traction plate and the traction frame are fixed more accurately.

Preferably, the cross section of the driving end is polygonal, a polygonal insertion hole matched with the shape of the driving end is formed in the connecting sleeve, and the driving end is inserted into and welded in the polygonal insertion hole. The structure can better fix the driving end and the connecting sleeve, and ensures that the rotation of the connecting sleeve can drive the screw rod to rotate.

Optionally, the left side and the right side of the fixed traction plate are both provided with L-shaped first fixed arm portions, each first fixed arm portion is provided with three first mounting holes, the middle portion of the fixed traction plate is provided with an outwardly extending middle arm portion, and the middle arm portion is provided with two first mounting holes; the left side and the right side of the movable traction plate are provided with L-shaped first movable arm parts, and three second mounting holes are formed in each first movable arm part.

Compared with the prior art, the utility model has the advantages of: because the screw rod is a solid rod piece, a connecting structure is inconvenient to arrange between the screw rod and the adjusting handle, the screw rod can be detachably connected with the adjusting handle through the connecting sleeve, and the adjusting handle can be inserted into the connecting sleeve, so that the connecting structure is convenient to arrange; this makes adjustment handle and screw rod break away from each other, accomplish the back of pulling at last, because of the breaking away of adjustment handle, make the external extra part that does not leave basically of patient, can not influence patient's appearance, avoid the patient simultaneously in daily activity because of touch the handle and arouse patient's discomfort, and avoid touch the adjustment handle because of external force carelessly and lead to the screw rod to produce and deflect towards the direction of relaxing, the traction position that arouses changes, ensure that fixed traction plate and activity traction plate remain in suitable position all the time, the new bone that guarantees to produce is level and smooth, operation quality is good.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a top view of an embodiment of the present invention;

FIG. 3 is a schematic perspective view of an adjustment handle according to an embodiment of the present invention in a disassembled intermediate position;

FIG. 4 is a schematic perspective view of the adjusting handle according to the embodiment of the present invention in a disassembled state;

fig. 5 is an exploded perspective view of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, it is a first embodiment of the present invention.

A jaw bone tractor with a detachable handle comprises

The traction frame 1 is provided with a guide groove 11 arranged along the length direction; a first plug 2a is fixed at the rear end of the guide groove 11, and an accommodating cavity 2a1 with an opening facing the guide groove 11 is arranged in the first plug 2 a; a second plug 2b is fixed at the front end of the guide groove 11; the guide groove 11 is composed of a circular groove 111 at the lower part and a strip groove 112 at the upper part, the strip groove 112 is communicated with the circular groove 111, and the maximum radial width of the circular groove 111 is larger than the width of the strip groove 112.

The fixed traction plate 3 is fixedly arranged relative to the traction frame 1, and a plurality of first mounting holes 31 for self-tapping screws to penetrate are formed in the fixed traction plate 3; the lower end surface of the fixed traction plate 3 is provided with a downward convex inserting rib 32 with the shape matched with the strip-shaped groove part 112, and the inserting rib 32 is inserted into the strip-shaped groove part 112 and then welded and fixed with the first plug 2 a. The left side and the right side of the fixed traction plate 3 are both provided with L-shaped first fixed arm parts 33, three first mounting holes 31 are arranged on each first fixed arm part 33, a middle arm part 34 extending outwards is arranged in the middle of the fixed traction plate 3, and two first mounting holes 31 are arranged on the middle arm part 34.

The movable traction seat 5 is restrained in the guide groove 11 and can axially slide, and a threaded through hole 511 which axially penetrates through the movable traction seat 5 is formed; the lower part of the movable traction seat 5 is provided with a cylindrical part 51 with the shape matched with the circular groove part 111, the threaded through hole 511 is arranged on the cylindrical part 51, the middle part of the movable traction seat 5 is provided with a guide part 52 with the shape matched with the strip-shaped groove part 112, and the lower end surface of the movable traction seat 5 is placed on the upper end surface of the traction frame 1.

The movable traction plate 6 is fixed on the movable traction seat 5, and a plurality of second mounting holes 61 for the self-tapping screws to penetrate are formed in the movable traction plate 6; a fixing column 53 protruding upwards is arranged in the middle of the upper end face of the movable traction seat 5, and a fixing hole 62 for inserting and matching the fixing column 53 is formed in the movable traction plate 6; the front and rear sides of the upper end surface of the movable traction seat 5 are provided with upwards protruding insertion blocks 54, and the front and rear sides of the movable traction plate 6 are provided with slots 63 for the insertion of the insertion blocks 54. The left and right sides of the movable traction plate 6 are provided with L-shaped first movable arm parts 64, and each first movable arm part 64 is provided with three second mounting holes 61.

The screw 7 is arranged in the guide groove 11 and can rotate around the axis of the screw 7, the front end of the screw 7 penetrates out of the traction frame 1 to form a driving end 72, and the screw 7 penetrates through and is in threaded connection with a threaded through hole 511 on the movable traction seat 5; the rear end of the screw 7 is movably inserted into the accommodating cavity 2a1, the front part of the screw 7 is provided with an annular blocking shoulder 71 which is blocked and matched with the second plug 2b, and the front end of the screw 7 penetrates through the second plug 2b to form the driving end 72. The traction distance is 0.4mm per rotation of the screw 7.

The adjusting handle 9 is characterized in that a connecting sleeve 8 is sleeved and fixed on the driving end 72, the cross section of the driving end 72 is polygonal, a polygonal inserting hole matched with the shape of the driving end is formed in the connecting sleeve, and the driving end is inserted into and welded in the polygonal inserting hole. The inner end of the adjusting handle 9 is inserted into and connected with the connecting sleeve 8 through the detachable connecting structure, and after the adjusting handle 9 is connected with the connecting sleeve 8, the screw 7 is driven by the rotation of the adjusting handle 9 to rotate together with the connecting sleeve 8.

The detachable connecting structure comprises two connecting grooves 81 arranged on the peripheral wall of the connecting sleeve 8 at intervals, and a clamping shaft 4 is radially inserted and fixed at the inner end of the adjusting handle 9, the peripheral wall of the adjusting handle 9 is arranged at the convex part at the two ends of the clamping shaft 4, the connecting grooves 81 are provided with a first axial groove part 811, a transverse groove part 813 and a second axial groove part 812, the top end of the first axial groove part 811 penetrates through the outer end surface of the connecting sleeve 8, the top end of the second axial groove part 812 is closed, and the bottom of the first axial groove part 811 is communicated with the bottom of the second axial groove part 812 through the transverse groove part 813; the clamping shaft 4 can enter from the opening end of the first axial groove portion 811 and be clamped into the top of the second axial groove portion 812 after passing through the transverse groove portion 813 to realize connection; the latch shaft 4 can move from the top to the bottom of the second axial slot 812 and slide out from the opening end of the first axial slot 811 via the transverse slot 813 for disassembly.

The inner of adjustment handle 9 is equipped with spring chamber 91, is equipped with spring 12 and movable sleeve 10 in the spring chamber 91, and it has radial bar hole 101 that runs through to open on the movable sleeve 10, and card axle 4 passes the bar hole 101 on the movable sleeve 10 that is located spring chamber 91, card axle 4 can slide along bar hole 101, movable sleeve 10 can slide in spring chamber 91, and spring 12 acts on movable sleeve 10 and makes it keep outwards moving and show the trend of a spring chamber 91, shows in the movable sleeve 10 of spring chamber 91 inserts adapter sleeve 8 to can support with the interior bottom surface of the drive end 72 outer terminal surface in the adapter sleeve 8 or adapter sleeve 8 and join in marriage.

In the embodiment, the movable traction plate 3 and the fixed traction plate 6 are made of pure titanium TA3 material, and other parts are made of titanium alloy TC4 material. The hardness of the titanium alloy is equal to or more than 260HV10, and the hardness of the pure titanium is equal to or more than 150HV 10.

When in use, the proper type of the jaw bone tractor is selected and the installation position of the tractor is determined, a small incision is cut on the corresponding jaw bone soft tissue, the fixed traction plate 3 is fixed on the jaw bone at one side of the incision, the movable traction plate 6 is fixed on the jaw bone at the other side of the incision, when in adjustment, the adjusting handle 9 is rotated clockwise (in the direction marked by an arrow on the handle) to drive the screw rod 7 to rotate, the movable traction plate 6 and the movable traction seat 5 are forced to slide forwards or backwards relative to the screw rod 4 according to the threaded connection adjustment working principle of the screw rod 7 and the threaded hole 511, the traction distance is 0.4mm when the screw rod 4 rotates one circle, a gap is generated, the self osteogenesis capability of the jaw bone is induced by utilizing the traction force to continuously form a new bone to fill the gap, the thread transmission of the screw rod 4 and the threaded hole 511 can accurately and slowly adjust the traction distance, after the clinical expected effect is achieved, and stopping traction.

Disassembling the adjusting handle 9: as shown in fig. 3 and 4, the adjusting handle 9 is pressed backwards, the clamping shaft 4 moves backwards relative to the strip-shaped hole 101, the clamping shaft 4 moves from the top to the bottom of the second axial groove portion 812 to the transverse groove portion 813, the adjusting handle 9 is rotated again, the clamping shaft 4 slides to the tail of the first axial groove portion 811 through the transverse groove portion 813, the adjusting handle 9 is pulled forwards, the clamping shaft 4 slides out from the opening end of the first axial groove portion 811, the clamping shaft 4 moves forwards relative to the strip-shaped hole 101, and finally the adjusting handle 9, the spring 12 therein and the movable sleeve 10 are separated from the connecting sleeve 8 together, and the disassembly is completed.

Installing an adjusting handle 9: the clamping shaft 4 is aligned with the opening end of the first axial groove portion 811, the adjusting handle 9 is pressed backwards, the adjusting handle 9 and the movable sleeve 10 enter the connecting sleeve 8, the rear end of the movable sleeve 10 abuts against the outer end face of the driving end 72 or the inner bottom face of the connecting sleeve 8, the adjusting handle 9 is continuously pressed backwards, the clamping shaft 4 moves backwards relative to the strip-shaped hole 101, the clamping shaft 4 can enter from the opening end of the first axial groove portion 811 and move to the tail portion of the first axial groove portion 811, the adjusting handle 9 is rotated again, the clamping shaft 4 slides to the bottom of the second axial groove portion 812 through the transverse groove portion 813, the adjusting handle 9 is pulled forwards, the clamping shaft 4 is clamped into the top of the second axial groove portion 812, the clamping shaft 4 is kept at the top of the second axial groove portion 812 under the action of the spring 12, connection between the adjusting handle 9 and the connecting sleeve 8 is achieved, and the screw 7 is driven by rotation of the adjusting handle 9 to rotate along with the connecting sleeve 8.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "upper, lower", "clockwise and counterclockwise" and the like refer to the orientation or positional relationship shown in the drawings, which are only for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Although the preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A jaw bone tractor with a detachable handle comprises

The traction frame (1) is provided with a guide groove (11) arranged along the length direction;

the fixed traction plate (3) is fixedly arranged relative to the traction frame (1), and a plurality of first mounting holes (31) for self-tapping screws to penetrate are formed in the fixed traction plate (3);

the movable traction seat (5) is constrained in the guide groove (11) and can axially slide, and a threaded through hole (511) which axially penetrates through the movable traction seat (5) is formed in the movable traction seat;

the movable traction plate (6) is fixed on the movable traction seat (5), and a plurality of second mounting holes (61) for the tapping screws to penetrate are formed in the movable traction plate (6);

the screw rod (7) is arranged in the guide groove (11) and can rotate around the axis of the screw rod, the front end of the screw rod (7) penetrates out of the traction frame (1) to form a driving end (72), and the screw rod (7) penetrates through and is in threaded connection with a threaded through hole (511) in the movable traction seat (5);

an adjustment handle (9);

the method is characterized in that: the driving end (72) is sleeved with and fixed with a connecting sleeve (8), the inner end of the adjusting handle (9) is inserted into and passes through the detachable connecting structure and is connected with the connecting sleeve (8), and after the adjusting handle (9) is connected with the connecting sleeve (8), the screw rod (7) is driven by the rotation of the adjusting handle (9) to rotate together with the connecting sleeve (8).

2. The jaw bone distractor with detachable handles of claim 1, wherein: the detachable connecting structure comprises two connecting grooves (81) which are arranged on the peripheral wall of the connecting sleeve (8) at intervals, and a clamping shaft (4) is radially inserted and fixed at the inner end of the adjusting handle (9), the outer peripheral wall of the adjusting handle (9) is arranged at the side protruding positions at two ends of the clamping shaft (4), the connecting grooves (81) are provided with a first axial groove part (811), a transverse groove part (813) and a second axial groove part (812), the top end of the first axial groove part (811) penetrates through the outer end surface of the connecting sleeve (8), the top end of the second axial groove part (812) is closed, and the bottom of the first axial groove part (811) is communicated with the bottom of the second axial groove part (812) through the transverse groove part (813); the clamping shaft (4) can enter from the opening end of the first axial groove part (811) and is clamped into the top of the second axial groove part (812) after passing through the transverse groove part (813) to realize connection; the clamping shaft (4) can move from the top to the bottom of the second axial groove part (812) and slide out from the opening end of the first axial groove part (811) after passing through the transverse groove part (813) to realize disassembly.

3. The handle-detachable jaw retractor according to claim 2, wherein: the inner of adjustment handle (9) is equipped with spring chamber (91), is equipped with spring (12) and movable sleeve (10) in spring chamber (91), it has radial bar hole (101) that run through to open on movable sleeve (10), bar hole (101) on movable sleeve (10) that lie in spring chamber (91) are passed in card axle (4), card axle (4) can slide along bar hole (101), movable sleeve (10) can slide in spring chamber (91), spring (12) act on movable sleeve (10) and make it keep moving outward and show the trend of department spring chamber (91), show movable sleeve (10) of spring chamber (91) insert adapter sleeve (8) in to can support with the interior bottom surface of drive end (72) outer terminal surface or adapter sleeve (8) in adapter sleeve (8) and join in marriage.

4. The handle-detachable jaw retractor according to claim 1, wherein: a first plug (2a) is fixed at the rear end of the guide groove (11), and an accommodating cavity (2a1) with an opening facing the guide groove (11) is formed in the first plug (2 a); a second plug (2b) is fixed at the front end of the guide groove (11); the rear end of the screw rod (7) is movably inserted into the accommodating cavity (2a1), the front part of the screw rod (7) is provided with an annular blocking shoulder (71) which is blocked and matched with the second plug (2b), and the front end of the screw rod (7) penetrates through the second plug (2b) to form the driving end (72).

5. The jaw bone distractor with detachable handles of claim 4, wherein: the guide groove (11) consists of a circular groove part (111) positioned at the lower part and a strip-shaped groove part (112) positioned at the upper part, the strip-shaped groove part (112) is communicated with the circular groove part (111), and the radial maximum width of the circular groove part (111) is greater than the width of the strip-shaped groove part (112); the lower part of the movable traction seat (5) is provided with a cylindrical part (51) of which the shape is matched with that of the circular groove part (111), the threaded through hole (511) is arranged on the cylindrical part (51), the middle part of the movable traction seat (5) is provided with a guide part (52) of which the shape is matched with that of the strip-shaped groove part (112), and the lower end surface of the movable traction seat (5) is placed on the upper end surface of the traction frame (1).

6. The handle detachable jaw retractor of claim 5 wherein: the middle part of the upper end face of the movable traction seat (5) is provided with a fixing column (53) protruding upwards, and the movable traction plate (6) is provided with a fixing hole (62) for inserting and matching the fixing column (53); the front side and the rear side of the upper end surface of the movable traction seat (5) are provided with upwards protruding insertion blocks (54), and the front side and the rear side of the movable traction plate (6) are provided with insertion grooves (63) for the insertion of the insertion blocks (54).

7. The handle detachable jaw retractor of claim 5 wherein: the lower end face of the fixed traction plate (3) is provided with a downward-convex dowel (32) matched with the strip-shaped groove part (112) in shape, and the dowel (32) is inserted into the strip-shaped groove part (112) and then welded and fixed with the first plug (2 a).

8. The handle-detachable jaw retractor according to claim 1, wherein: the cross section of the driving end (72) is polygonal, a polygonal insertion hole matched with the shape of the driving end is formed in the connecting sleeve, and the driving end is inserted into and welded in the polygonal insertion hole.

9. The handle-detachable jaw retractor according to claim 1, wherein: the left side and the right side of the fixed traction plate (3) are respectively provided with an L-shaped first fixed arm part (33), each first fixed arm part (33) is provided with three first mounting holes (31), the middle part of the fixed traction plate (3) is provided with a middle arm part (34) extending outwards, and the middle arm part (34) is provided with two first mounting holes (31); the left side and the right side of the movable traction plate (6) are provided with L-shaped first movable arm parts (64), and three second mounting holes (61) are formed in each first movable arm part (64).