CN214414948U - Jaw frame - Google Patents

Abstract

The utility model relates to a jaw frame relates to medical instrument technical field, its technical scheme mainly includes the fixing base, lower fixing base, stand and the degree adjustment mechanism that leads of condyle, the degree adjustment mechanism that leads is set up on last fixing base in order to be used for adjusting the condyle of maxilla seat and mandible seat and leads the gradient, the stand is in order to be used for connecting fixed upper fixing base and lower fixing base, be provided with on the stand with last fixing base rotate the connecting axle of being connected, the cover is equipped with the elastic component on the connecting axle, the elastic component is kept away from the one end of connecting axle and is connected with last fixing base. The application has the advantage of improving the simulation effect of the jaw frame for simulating the protrusive occlusion action of the upper jaw and the lower jaw.

Description

Jaw frame

Technical Field

The application relates to the technical field of medical instruments, in particular to a jaw frame.

Background

Currently, jaw frames are apparatuses for simulating jaws and jaw hinge mechanisms in order to analyze and diagnose problems associated with dentures, and to manufacture various devices and dentures according to the specific occlusal conditions of patients. The actual meshing condition of the false tooth in the cavity of the human body is simulated through the jaw frame, and the effect of processing the false tooth more suitable for the human body is achieved.

The traditional jaw frame mainly comprises an upper fixing seat, a lower fixing seat, an upright post, a condyle guiding degree adjusting mechanism and a condyle guiding positioning mechanism, wherein the upright post is used for connecting the upper fixing seat and the lower fixing seat, the upper fixing seat and the lower fixing seat are respectively used for an upper jaw seat and a lower jaw seat, the condyle guiding degree adjusting assembly is arranged on the upper fixing seat and is used for adjusting the condyle guiding gradient of the upper jaw seat and the lower jaw seat, and the condyle guiding needle positioning mechanism is arranged at the front end of the upper fixing seat and is used for positioning the position of an artificial tooth.

However, in the practical use process, the applicant finds that when the traditional jaw frame simulates the forward extending occlusion action, if the upper fixing seat separated from the upright post needs to be restored to the original position, the user needs to restore the position, and the occlusion action effect of the upper jaw and the lower jaw in the oral cavity of the simulated human is poor, so that the improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to improve the effect that the jaw frame simulates the protrusive occlusion action of an upper jaw and a lower jaw, the application provides the jaw frame.

The application provides a jaw frame adopts following technical scheme:

the jaw frame comprises an upper fixing seat, a lower fixing seat, an upright post and a condyle guiding degree adjusting mechanism, wherein the condyle guiding degree adjusting mechanism is arranged on the upper fixing seat and used for adjusting the condyle guiding inclination of an upper jaw seat and a lower jaw seat, the upright post is used for connecting and fixing the upper fixing seat and the lower fixing seat, a connecting shaft rotatably connected with the upper fixing seat is arranged on the upright post, an elastic piece is sleeved on the connecting shaft, and one end, far away from the connecting shaft, of the elastic piece is connected with the upper fixing seat.

Through adopting above-mentioned technical scheme, be connected with the elastic component through last fixing base and stand between for can automatic re-setting when last fixing base drives the upper jaw seat and carries out the anteextension or rethread, make the upper jaw seat can also automatic re-setting after the anteextension, and then the better anteextension action of simulating people's intraoral upper jaw and lower jaw spare.

Preferably, the condyle guiding degree adjusting mechanism comprises a condyle guiding disc, a connecting lock clamp and a locking piece, the condyle guiding disc is rotatably connected with the connecting shaft, the locking piece is in threaded connection with the condyle guiding disc and is abutted against the condyle guiding disc to be fixedly connected onto the connecting shaft, the connecting lock clamp is rotatably arranged on one side, close to the connecting shaft, of the condyle guiding disc, the condyle guiding disc is close to the fixed shaft arranged on one side of the upper fixed base, the upper fixed base is provided with a tightening part used for tightening the fixed shaft, the upper fixed base is provided with a screw rod used for locking the fixed tightening part in a threaded connection mode, and the fixed shaft is rotatably arranged in the tightening part.

By adopting the technical scheme, the connection effect is realized through the condyle guiding disc, the connection lock and the connecting shaft on the locking part and the stand column, the condyle guiding disc and the upper fixing base are hooped and fixed, the upper fixing base and the condyle guiding disc are locked and fixed after the position of the upper fixing plate is adjusted through rotation, the effect of adjusting the included angle between the upper fixing base and the lower fixing base is realized, and the effect of adjusting the condyle guiding gradient is realized.

Preferably, the one end that the fixing base upside was stretched out to the screw rod is provided with outer hexagonal portion, the screw rod upper end is provided with the cover and establishes the rotation cover to outer hexagonal portion, be provided with on the rotation cover inner wall with outer hexagonal portion complex interior hexagonal portion, the rotation is sheathe in and is still provided with the turning handle.

Through adopting above-mentioned technical scheme, realize the screw rod and the joint action who rotates the cover through setting up outer hexagonal portion and interior hexagonal portion, realize rotating the cover through rotating the turning handle and drive the screw rod and carry out the pivoted effect, realize going up the effect that the fixing base cramps or loosens the fixed axle, and then realize being convenient for rotate the effect of screw rod.

Preferably, the outer hexagonal part and the inner hexagonal part are arranged in a staggered mode along the length direction of the screw rod, the rotating sleeve can be lifted upwards to achieve the connecting effect of the inner hexagonal part and the outer hexagonal part, and when the outer hexagonal part and the inner hexagonal part are staggered, the rotating sleeve can be arranged at the upper end of the screw rod in a rotating mode.

Through adopting above-mentioned technical scheme, because the turning handle and the cover of rotating are touched to mistake occasionally, make the screw rod take place to rotate and lead to going up being connected between fixing base and the fixed axle and taking place to relax, lead to the condyle to lead the gradient to change, influence the judgement that the artificial tooth was restoreed to the user, consequently, will set up outer hexagonal and the setting of staggering of interior hexagonal, upwards lift when needing and rotate the cover and make interior hexagonal portion and outer hexagonal portion connection effect, realize that the rotatory cover of rotating of accessible realizes driving screw rod pivoted effect, when not needing to adjust, can slide downwards and rotate the cover and break away from the connection effect of rotating cover and screw rod, even the rotatory cover of rotating can not lead to rotating the cover at this moment and drive the pivoted condition of turning handle yet.

Preferably, a spring used for pulling the rotating sleeve to slide downwards is arranged in the rotating sleeve, one end of the spring is connected with the upper end of the screw rod, and the other end of the spring is connected with an inner bottom of the rotating sleeve.

Through adopting above-mentioned technical scheme, the setting of spring will be used for driving and rotates the cover gliding, is convenient for realize rotating the cover gliding operation that resets, improves the installation stability who rotates the cover.

Preferably, the condyle guide disc is provided with a connecting column for connecting the elastic member, the connecting column is arranged in parallel with the connecting shaft, and the elastic member is provided with a connecting hole penetrating through the connecting column.

Through adopting above-mentioned technical scheme, the setting of spliced pole and connecting hole is so that realize the connection effect of elastic component and last fixing base, the dismantlement operation of elastic component of also being convenient for simultaneously.

Preferably, one end of the connecting column, which is far away from the condyle guide disc, is coaxially provided with a limiting part, and the area of the limiting part is larger than that of the end surface of the connecting column.

Through adopting above-mentioned technical scheme, the setting of spacing portion will restrict the elastic component that is connected to on the spliced pole, reduces the condition of elastic component follow spliced pole roll-off, improves the connection stability of elastic component and spliced pole.

Preferably, one end of the elastic element, which is far away from the connecting shaft, is further provided with a stretching part which is convenient for stretching the elastic element.

Through adopting above-mentioned technical scheme, because the restriction of elastic component installation space will be provided with tensile portion on the elastic component to the user installs the elastic component to the spliced pole on.

In summary, the present application includes at least one of the following beneficial technical effects:

the elastic part is arranged between the upright post and the upper fixing seat, so that the upper fixing seat can better simulate the connection effect between the upper jaw and the lower jaw in the oral cavity of a human in the process of extending forwards or moving backwards, further better simulate the linkage effect between the upper jaw and the lower jaw, and improve the quality of false tooth repair;

the locking or unlocking function between the upper fixed seat and the condylar guide disc is realized conveniently by arranging the screw rod, the outer hexagonal part, the rotating sleeve, the inner hexagonal part, the spring and the rotating handle.

Drawings

Fig. 1 is a schematic view of the overall structure of a jaw frame according to embodiment 1 of the present application;

fig. 2 is a schematic bottom view of the jaw frame of embodiment 1 of the present application;

FIG. 3 is an enlarged view of part A of FIG. 1;

fig. 4 is a rear view structure diagram of the jaw frame of embodiment 1 of the present application;

FIG. 5 is an enlarged view of part B of FIG. 4;

FIG. 6 is a schematic view of FIG. 5 with the elastic member hidden;

fig. 7 is a schematic vertical sectional view of the upper fixing base of the jaw frame according to embodiment 1 of the present application;

FIG. 8 is a schematic structural view of embodiment 2;

FIG. 9 is a schematic structural view of embodiment 3;

FIG. 10 is an enlarged view of a portion C of FIG. 9;

FIG. 11 is a schematic structural view of example 4.

Reference numerals: 1. an upper fixed seat; 2. a lower fixed seat; 3. a column; 4. positioning seats; 5. a cross positioning slot; 6. a second threaded hole; 7. a lower support pillar; 8. a positioning column; 9. a second positioning groove; 10. a support bar; 11. a first mounting hole; 12. a rubber sleeve; 13. a poke rod; 14. an upper limiting column; 15. a lower restraint post; 16. a condylar guide pin; 17. a needle seat; 18. a sliding groove; 19. a guide groove; 20. an adjusting knob; 21. scale lines; 22. positioning a line; 23. a first threaded hole; 24. a positioning member; 25. a first positioning groove; 26. a sleeve; 27. hooking; 28. reserving a seam; 29. a connecting shaft; 30. an elastic member; 31. a condyle guide disc; 32. connecting a lock card; 33. a locking member; 34. a fixed shaft; 35. a tightening part; 36. a screw; 37. connecting columns; 38. connecting holes; 39. a limiting part; 40. a stretching section; 41. an outer hex portion; 42. rotating the sleeve; 43. a handle is rotated; 44. an inner hex portion; 45. a spring; 46. cushion blocks; 47. a rubber layer; 48. connecting ropes; 49. a magnet block; 50. magic tape.

Detailed Description

The present application is described in further detail below with reference to figures 1-11.

The embodiment of the application discloses jaw frame.

Example 1:

referring to fig. 1 and 2, the jaw frame includes an upper fixing seat 1, a lower fixing seat 2, an upright post 3, a condylar guidance degree adjusting mechanism, a condylar guidance positioning mechanism, an inclined strut mechanism and an occlusal surface positioning mechanism; the stand 3 is connected to one side end that supreme fixing base 1 and lower fixing base 2 set up the same, the upper jaw seat and the lower jaw seat of artificial tooth are fixed respectively to supreme fixing base 1 and lower fixing base 2 set up on the face in opposite directions, the degree adjustment mechanism that leads of the condyle sets up on the connecting end of last fixing base 1 and stand 3 in order to be used for adjusting the condyle that leads the gradient between upper jaw seat and the lower jaw seat, the bracing mechanism sets up on stand 3 in order to be used for supporting the jaw frame under the tilt state, occlusal surface positioning mechanism sets up in jaw frame middle part position in order to be used for fixing a position the occlusal surface.

Referring to fig. 1, fig. 2 shows, lower fixing base 2 is in order to be used for fixed lower jaw seat, two stands 3 all are fixed to on lower fixing base 2, the one end that stand 3 was kept away from to lower fixing base 2 is fixed with positioning seat 4, positioning seat 4 upper surface is provided with cross constant head tank 5, second screw hole 6 has still been seted up on lower fixing base 2, threaded connection has lower support post 7 on the second screw hole 6, the effect of fixing base 1 is fixed in order to realize the butt with last fixing base 1 butt in the upper end of lower support post 7, lower support post 7 is located the rear side of artificial tooth, upward be provided with reference column 8 on the 1 downside of fixing base, second constant head tank 9 has been seted up to reference column 8's lower extreme, the most advanced setting in upper end of lower support post 7.

Referring to fig. 1 and 2, the inclined strut mechanism includes a support rod 10 rotatably installed on opposite sides of the two upright posts 3, a first installation hole 11 is formed at the upper end of the support rod 10, and the upper ends of the two support rods 10 are respectively clamped to one side of the opposite ends of the two upright posts 3 after passing through the first installation hole 11 by a screw. Two bracing pieces 10 all are the arc form setting, and two bracing pieces 10 all are outwards to open the setting from the tie point with stand 3 to the direction of keeping away from the jaw frame to the free end, further improve support stability. In order to improve the supporting stability between the lower ends of the two supporting rods 10 and the supporting surface, the lower ends of the two supporting rods 10 are sleeved with rubber sleeves 12, so that the friction force between the supporting rods 10 and the supporting surface is improved. A tap lever 13 is provided on the side of the support bar 10 remote from the upright 3 to facilitate the rotational operation of the support bar 10.

Further, referring to fig. 1 and 2, the upright post 3 is further fixed with an upper limit post 14 and a lower limit post 15 for limiting the rotation end point of the support rod 10, the upper limit post 14 is located on a side of the support rod 10 away from the denture, when the support rod 10 is rotated away from the upright post 3, the upper limit post 14 abuts against the upper side of the support rod 10 to perform the function of limiting, supporting and fixing, the lower limit post 15 is located on a side of the support rod 10 close to the denture, and when the support rod 10 is rotated back to the upright post 3, the lower limit post 15 abuts against a side of the support rod 10 close to the denture.

Referring to fig. 1 and 2, the condylar guide positioning mechanism includes a condylar guide pin 16 and a needle seat 17, the condylar guide pin 16 is vertically disposed right in front of the artificial tooth, a sliding groove 18 is disposed right in front of the upper fixing seat 1, the upper end of the needle seat 17 is detachably clamped and fixed in the sliding groove 18 through a nut, a guide groove 19 disposed in the length direction of the condylar guide pin 16 is disposed at the lower end of the needle seat 17, an adjusting knob 20 for abutting and tightly fixing the condylar guide pin 16 to the guide groove 19 is connected to one side of the needle seat 17 through a screw thread, a scale mark 21 is disposed on the needle seat 17, the guide groove 19 is communicated with one side surface right in front of the needle seat 17, a positioning line 22 is disposed on the condylar guide pin 16, the lower end of the condylar guide pin 16 is positioned to the center of the cross positioning groove 5 of the positioning seat 4, and the positioning line is convenient for accurately adjusting the height of the condylar guide pin 16 to the positioning seat 4.

Referring to fig. 1 and 2, the upper end surface of the upper fixing seat 1 is further provided with a first threaded hole 23 having the same structure as the second threaded hole 6, the lower support column 7 can be detached from the second threaded hole 6 and mounted on the first threaded hole 23 to be used as a reverse support rod 10, and the reverse support rod 10 plays a supporting role when the upper fixing seat 1 needs to be turned upwards to be placed.

Occlusal surface positioning mechanism is including dismantling around establishing to two stands 3 and the condyle guide pin 16 outside and forming the setting element 24 that the triangle is cyclic annular to be set up, setting element 24 is located jaw frame middle part position in order to be used for fixing a position the occlusal surface of maxilla and mandible, in this embodiment, setting element 24 sets up to the elasticity rope, all offer the first constant head tank 25 that is used for the elasticity rope on stand 3 and condyle guide pin 16, when the first constant head tank 25 on the elasticity rope installation to two stands 3 and condyle guide pin 16 in, setting element 24 forms the occlusal surface of artificial tooth.

In this embodiment, referring to fig. 1 and fig. 3, the positioning element 24 is in an open-loop configuration, two ends of the positioning element 24 in the length direction are both provided with metal sleeves 26, one ends of the two sleeves 26 away from the positioning element 24 are both provided with hooks 27, and the two hooks 27 can be hooked to form a closed-loop configuration for the positioning element 24. Further, reserved seams 28 extending along the length direction of the sleeve 26 are formed on the outer side walls of the two sleeves 26, so that the two ends of the elastic rope are clamped and fixed in the sleeves 26.

Referring to fig. 4 and 5, the condylar guidance degree adjusting mechanism is disposed on the upper fixing base 1 for adjusting the condylar guidance inclination of the maxillary seat and the mandibular seat. A connecting shaft 29 which is rotatably connected with the upper fixed seat 1 is arranged on the upright post 3, and an elastic part 30 is sleeved on the connecting shaft 29; the condyle guiding degree adjusting mechanism comprises a condyle guiding disc 31, a connecting locking clamp 32 and a locking part 33, the condyle guiding disc 31 is rotatably connected with the connecting shaft 29, the locking part 33 is connected to the condyle guiding disc 31 in a threaded manner so as to be used for abutting and fixing the condyle guiding disc 31 on the connecting shaft 29, the connecting locking clamp 32 is rotatably arranged on one side of the condyle guiding disc 31 close to the connecting shaft 29, the connecting locking clamp 32 is rotatably hooked on the connecting shaft 29, one end of the elastic part 30 far away from the connecting shaft 29 is fixedly connected with a rotating shaft of the connecting locking clamp 32, a fixed shaft 34 is arranged on one side of the condyle guiding disc 31 close to the upper fixed seat 1, a hooping part 35 for hooping the fixed shaft 34 is arranged on the upper fixed seat 1, a screw 36 for locking and fixing the hooping part 35 is connected to the upper fixed seat 1 in a threaded manner, and the fixed shaft 34 is rotatably arranged in the hooping part 35, the clamping degree of the upper fixing seat 1 to the fixed shaft 34 is adjusted by rotating the screw rod 36, and the condyle guide inclination is adjusted by rotating the upper fixing seat 1.

Referring to fig. 5 and 6, a connection post 37 for connecting the elastic member 30 is disposed on the condylar guiding disc 31, the connection post 37 is disposed in parallel with the connection shaft 29, a connection hole 38 penetrating through the connection post 37 is formed in the elastic member 30, a limiting portion 39 is coaxially disposed at one end of the connection post 37 away from the condylar guiding disc 31, the area of the limiting portion 39 is larger than that of an end surface of the connection post 37, a stretching portion 40 convenient for stretching the elastic member 30 is further disposed at one end of the elastic member 30 away from the connection shaft 29, and a user can pull the stretching portion 40 by hand to fasten the connection hole 38 of the elastic member 30 to the connection post 37 for installation.

Referring to fig. 4 and 7, an outer hexagonal part 41 is arranged at one end of the screw 36 extending out of the upper side of the upper fixing seat 1, a rotating sleeve 42 sleeved on the outer hexagonal part 41 is arranged at the upper end of the screw 36, a rotating handle 43 is further fixed on the rotating sleeve 42, an inner hexagonal part 44 matched with the outer hexagonal part 41 is arranged on the inner wall of the rotating sleeve 42, the outer hexagonal part 41 and the inner hexagonal part 44 are staggered along the length direction of the screw 36, the rotating sleeve 42 can be lifted upwards to realize the connection effect of the inner hexagonal part 44 and the outer hexagonal part 41, a spring 45 for pulling the rotating sleeve 42 to slide downwards is arranged in the rotating sleeve 42, one end of the spring 45 is connected with the upper end of the screw 36, the other end of the spring 45 is connected with the inner bottom surface of the rotating sleeve 42, when the external hexagonal part 41 is staggered with the internal hexagonal part 44, the rotating sleeve 42 can be rotatably arranged at the upper end of the screw rod 36, and the rotating sleeve 42 after the rotation is reset downwards under the action of the spring 45.

The implementation principle of the embodiment 1 is as follows: the artificial tooth prosthesis is characterized in that an upper jaw seat and a lower jaw seat are respectively installed on an upper fixing seat 1 and a lower fixing seat 2, the upper fixing seat 1 is installed on an upright post 3, the condylar guide inclination of the upper fixing seat 1 is adjusted and then is locked and fixed through a screw rod 36, a condylar guide disc 31 is fixedly connected with a connecting shaft 29, an elastic part 30 is connected onto a connecting column 37, a rotary connecting lock clamp 32 is hooked onto the connecting shaft 29, and a condylar guide positioning mechanism is installed on the upper fixing seat 1, so that the observation and repair operation of the artificial tooth can be carried out.

Example 2:

referring to fig. 8, the present embodiment is different from embodiment 1 in that a cushion block 46 is further fixed to the lower end of the two support rods 10, and a rubber layer 47 is further bonded to the lower end surface of the cushion block 46.

The implementation principle of the embodiment 2 is as follows: the difference from embodiment 1 is that the lower end surface of the spacer 46 abuts against the support surface.

Example 3:

referring to fig. 9 and 10, the present embodiment is different from embodiment 1 in that the positioning member 24 includes two elastic connection ropes 48, one end of each of the two connection ropes 48 is connected to the pillar 3, one end of each of the two connection ropes 48 away from the pillar 3 is detachably connected to the corresponding condylar guide pin 16, one end of each of the two connection ropes 48 away from the pillar 3 is provided with a magnet block 49, and the two magnet blocks 49 are magnetically attached to the corresponding condylar guide pin 16 made of iron.

The implementation principle of the embodiment 3 is as follows: the difference from the embodiment 1 is that one end of the connecting rope 48 in this embodiment is connected to the pillar 3, and the other end is fixed to the condylar guiding pin 16 by the magnet 49.

Example 4:

referring to fig. 11, the difference between the embodiment and the embodiment 3 is that one ends of the two connection ropes 48 far from the pillar 3 are both connected to the condylar guide pin 16 through the magic tapes 50, the female tapes of the magic tapes 50 are fixed on the condylar guide pin 16 in an adhering manner, and the male tapes of the magic tapes 50 are fixed on the two connection ropes 48.

The implementation principle of the embodiment 4 is as follows: the difference from the embodiment 3 is that the two connection ropes 48 are connected with the condylar guide needle 16 through the magic tape 50, and the detachable connection is realized by releasing the male tape and the female tape on the connection ropes 48.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The jaw frame comprises an upper fixing seat (1), a lower fixing seat (2), an upright post (3) and a condylar guidance degree adjusting mechanism, wherein the condylar guidance degree adjusting mechanism is arranged on the upper fixing seat (1) and used for adjusting the condylar guidance gradient of an upper jaw seat and a lower jaw seat, the upright post (3) is used for connecting and fixing the upper fixing seat (1) and the lower fixing seat (2), and the jaw frame is characterized in that: be provided with on stand (3) and rotate connecting axle (29) of being connected with last fixing base (1), the cover is equipped with elastic component (30) on connecting axle (29), the one end that connecting axle (29) were kept away from in elastic component (30) is connected with last fixing base (1).

2. The jaw frame of claim 1, wherein: the condyle guiding degree adjusting mechanism comprises a condyle guiding disc (31), a connecting locking clamp (32) and a locking piece (33), the condyle guide disc (31) is rotatably connected with the connecting shaft (29), the locking piece (33) is in threaded connection with the condyle guide disc (31) to be used for abutting and fixing the condyle guide disc (31) on the connecting shaft (29), the connecting lock clip (32) is rotationally arranged on one side of the condyle guide disc (31) close to the connecting shaft (29), the connecting lock clip (32) can be hooked on the connecting shaft (29) in a rotating way, a fixed shaft (34) is arranged on one side of the condyle guide disc (31) close to the upper fixed seat (1), the upper fixed seat (1) is provided with a tightening part (35) for tightening the fixed shaft (34), go up threaded connection on fixing base (1) and be used for locking screw rod (36) of fixed portion of cramping (35), fixed axle (34) rotatable setting is in cramping portion (35).

3. The jaw frame of claim 2, wherein: the one end that fixing base (1) upside was stretched out in screw rod (36) is provided with outer hexagonal portion (41), screw rod (36) upper end is provided with the cover and establishes rotation cover (42) to outer hexagonal portion (41), be provided with on rotating cover (42) inner wall with outer hexagonal portion (41) complex interior hexagonal portion (44), still be provided with turning handle (43) on rotating cover (42).

4. The jaw frame of claim 3, wherein: the outer hexagonal part (41) and the inner hexagonal part (44) are arranged in a staggered mode along the length direction of the screw (36), the rotating sleeve (42) can be lifted upwards to achieve the connecting effect of the inner hexagonal part (44) and the outer hexagonal part (41), and when the outer hexagonal part (41) is staggered with the inner hexagonal part (44), the rotating sleeve (42) can be rotatably arranged at the upper end of the screw (36).

5. The jaw frame of claim 4, wherein: a spring (45) used for pulling the rotating sleeve (42) to slide downwards is arranged in the rotating sleeve (42), one end of the spring (45) is connected with the upper end of the screw rod (36), and the other end of the spring (45) is connected with the inner bottom of the rotating sleeve (42).

6. The jaw frame of claim 2, wherein: the condyle guide disc (31) is provided with a connecting column (37) for connecting the elastic part (30), the connecting column (37) is arranged in parallel with the connecting shaft (29), and the elastic part (30) is provided with a connecting hole (38) penetrating to the connecting column (37).

7. The jaw frame of claim 6, wherein: one end of the connecting column (37) far away from the condyle guide disc (31) is coaxially provided with a limiting part (39), and the area of the limiting part (39) is larger than that of the end face of the connecting column (37).

8. The jaw frame of claim 6, wherein: one end of the elastic piece (30) far away from the connecting shaft (29) is also provided with a stretching part (40) which is convenient for stretching the elastic piece (30).

Images