Occipital bone axis distraction measuring device

Abstract

The utility model discloses an occipital bone axis distraction measuring device, and belongs to the field of medical instruments. The occipital bone and axis distraction measuring device comprises a moving assembly, a first distraction rod, a second distraction rod, a stabilizing assembly and a measuring piece, the first distraction rod and the second distraction rod are installed at the two ends of the moving assembly, the stabilizing assembly is installed between the first distraction rod and the second distraction rod, and the measuring piece is connected with the moving assembly, the first distraction rod or the second distraction rod. The moving assembly is used for adjusting the distance between the first distraction rod and the second distraction rod, the stabilizing assembly is used for providing supporting force for the first distraction rod and the second distraction rod, the measuring part is used for displaying the distance between the first distraction rod and the second distraction rod, and a first acting part is arranged at the end, away from the moving assembly, of the first distraction rod. A second acting part is arranged at the end, away from the moving assembly, of the second distraction rod. The joint gap of the atlantoaxial joint can be stably and accurately expanded, and the problems that in the prior art, a pair of simple expanding forceps is prone to loosening, and adjustment is not accurate are solved.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and specifically relates to an occipital atlas-axis distraction measurement device. Background Art

[0002] Posterior cervical atlantoaxial lateral arthrodesis is a relatively mature surgical method. The most important surgical step is to implant artificial bone or a fusion device into the joint space of the lateral atlantoaxial joint. However, the normal joint space is relatively narrow, and it is difficult to implant the fusion device. Therefore, a special instrument designed for this surgery is needed to solve this problem.

[0003] Currently, there is no distractor dedicated to distracting the joint space of the atlantoaxial joint. The distractor currently in use is usually a simple spreading forceps, which has disadvantages such as easy loosening and inaccurate adjustment. Summary of the Utility Model

[0004] Utility Model Objective: To provide an occipital atlas-axis distraction measurement device that can stably and accurately distract the joint space of the atlantoaxial joint, and solve the problems of easy loosening and inaccurate adjustment of the existing simple spreading forceps.

[0005] The technical solution of the utility model is as follows: An occipital atlas-axis distraction measurement device includes: a moving component, a first spreading rod, a second spreading rod, a stabilizing component, and a measuring component.

[0006] The first spreading rod and the second spreading rod are installed at both ends of the moving component, the stabilizing component is installed between the first spreading rod and the second spreading rod, and the measuring component is connected to the moving component, the first spreading rod, or the second spreading rod.

[0007] The moving component is used to adjust the distance between the first spreading rod and the second spreading rod, the stabilizing component is used to provide a supporting force for the first spreading rod and the second spreading rod, and the measuring component is used to display the distance between the first spreading rod and the second spreading rod.

[0008] One end of the first spreading rod away from the moving component is provided with a first acting portion, and one end of the second spreading rod away from the moving component is provided with a second acting portion.

[0009] In a further embodiment, the moving component includes: a toothed rod, a clamping block, a hollow rod, a first gear, and an operating member.

[0010] The operating member includes: a housing and an adjusting handle.

[0011] The second spreading rod is provided with a through hole, and the hollow rod is provided with a long hole.

[0012] The toothed rod is connected to the first spreading rod, the clamping block is connected to the first spreading rod, the hollow rod is connected to the second spreading rod, the toothed rod is inserted into the through hole of the second spreading rod, and the clamping block is clamped in the long hole of the hollow rod.

[0013] The first gear is arranged in the long hole of the hollow rod, the first gear meshes with the toothed rod, the housing is connected to the hollow rod, the adjusting handle is connected to the housing, and the adjusting handle is connected to the first gear.

[0014] When the first gear is rotated by using the adjusting handle, the first gear drives the toothed rod to move, improving the stability and accuracy of the distance adjustment between the first spreading rod and the second spreading rod.

[0015] In a further embodiment, the operating member further includes: a second gear, an adjusting dial, a limiting dial, a one-way spring and a dial handle.

[0016] The second gear, the adjusting dial, the limiting dial and the one-way spring are arranged in the housing, the second gear is connected to the adjusting handle, the dial handle is connected to the housing, and the dial handle is connected to the adjusting dial.

[0017] Two of the one-way springs and two of the limiting dials are arranged on both sides inside the housing. One end of each of the two limiting dials is rotatably connected to the housing. The two limiting dials are arranged between the two one-way springs. The adjusting dial is arranged between the two limiting dials. The one-way spring is used to apply a force towards the gear direction to the limiting dial, so that the end of the limiting dial can be engaged with the second gear to limit the rotation direction of the second gear.

[0018] The adjusting dial is an eccentric wheel provided with an eccentric part. When the eccentric part of the adjusting dial rotates to a predetermined angle towards one of the limiting dials, the limiting dial is separated from the second gear, enabling the second gear to rotate unidirectionally, avoiding the problem of the random change of the distance between the first spreading rod and the second spreading rod during the operation, and further improving the use safety.

[0019] In a further embodiment, the stabilizing assembly includes: a first stabilizing rod, a second stabilizing rod and a stabilizing spring.

[0020] The first stabilizing rod is connected to the first spreading rod, the second stabilizing rod is connected to the second spreading rod, the stabilizing spring is arranged in the second stabilizing rod, and the first stabilizing rod is inserted into the second stabilizing rod and connected to the stabilizing spring.

[0021] In a further embodiment, the first acting part is a first L-shaped rod. One end of the first L-shaped rod is connected to the first spreading rod, and the other end extends a predetermined distance downward from the first spreading rod.

[0022] The second action part is a second L-shaped rod, one end of which is connected to the second expansion rod, and the other end of which extends a predetermined distance below the second expansion rod, which has the advantage of not blocking the surgical field of view.

[0023] In a further embodiment, the occipital axis distraction measuring device further comprises: at least one locking bolt.

[0024] One end of the first L-shaped rod is plugged into and matched with the first spreading rod, and / or one end of the second L-shaped rod is plugged into and matched with the second spreading rod.

[0025] The locking bolt is threadedly engaged with the first expansion rod and / or the second expansion rod, and is used to fix the first L-shaped rod and / or the second L-shaped rod, so as to adjust the length of the first action part and / or the second action part, and adjust the angle of the expansion spacing to adapt to the anatomical differences between different individuals.

[0026] In a further embodiment, a clamp block is provided at one end of the first L-shaped rod extending downward from the first spreading rod, and the clamp block is used to be clamped on the spinous process of the axis vertebra.

[0027] An end of the second L-shaped rod extending downward from the second spreading rod is provided with an anchoring module, and the anchoring module is used to anchor the occipital bone, so that the spreading process is more stable.

[0028] In a further embodiment, at least two clamping protrusions are provided at one end of the clamping block away from the anchoring module, the cross-section of the clamping protrusion is a trapezoidal structure, and a clamping groove is formed between adjacent clamping protrusions, and the clamping groove is used to clamp on the spinous process of the axis vertebra.

[0029] An anchoring protrusion is arranged at one end of the anchoring module away from the clamping block. The anchoring protrusion is a conical structure or a pyramidal structure and is used for anchoring the occipital bone.

[0030] In a further embodiment, the measuring member is a scale mounted on the gear rod.

[0031] In a further embodiment, the block is an I-shaped structure, the two inner walls of the block abut against the outer wall of the hollow rod, and the two outer walls of the block abut against the inner wall of the hollow rod, so that the block slides in the long hole of the hollow rod.

[0032] The beneficial effects of the utility model are as follows: the application cooperates with the bones at a predetermined position through the first action part and the second action part, and then uses the moving component to adjust the distance between the first spread rod and the second spread rod; in the process of adjusting the distance, the stabilizing component provides supporting force for the first spread rod and the second spread rod, and the measuring part displays the distance between the first spread rod and the second spread rod, so as to stably and accurately spread the joint space of the atlantoaxial joint, and solves the problems of easy loosening and imprecise adjustment of the simple spreader pliers used in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an overall axonometric schematic diagram of the utility model.

[0034] Figure 2 It is a top view schematic diagram of an embodiment of the hidden operating member of the utility model.

[0035] Figure 3 It is an independent axonometric schematic diagram of the first propping rod and some parts of the moving assembly of the utility model.

[0036] Figure 4 It is an independent axonometric schematic diagram of the second propping rod and some parts of the moving assembly of the utility model.

[0037] Figure 5 It is an independent perspective schematic diagram showing that the stabilizing spring of the stabilizing assembly of the utility model is in an open state.

[0038] Figure 6 It is an independent perspective schematic diagram of a stabilizing spring of a stabilizing assembly of the utility model in a compressed state.

[0039] Figure 7 It is a simplified structural diagram of the cooperation of the second gear, the adjusting paddle, the limiting paddle and the one-way spring of the utility model.

[0040] Figure 8 It is an axonometric schematic diagram of the first gear and the second gear of the utility model.

[0041] The reference numerals shown in the figure are: moving component 100, operating part 101, shell 1011, adjusting handle 1012, paddle handle 1013, second gear 1014, adjusting paddle 1015, limiting paddle 1016, one-way spring 1017, central axis 1018, gear rod 102, first gear 103, block 104, hollow rod 105, long hole 1051, first spreading rod 200, first acting part 201, clamping block 202, clamping protrusion 203, second spreading rod 300, second acting part 301, anchoring module 302, anchoring protrusion 303, through hole 304, stabilizing component 400, first stabilizing rod 401, second stabilizing rod 402, stabilizing spring 403, locking bolt 500, measuring part 600. Detailed implementation mode

[0042] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some technical features well known in the art are not described.

[0043] The present application discloses an occipital cervical vertebra distraction measuring device, which can stably and accurately distract the joint space of the atlantoaxial joint, and solves the problems of easy loosening and inaccurate adjustment of the existing simple distraction forceps.

[0044] As Figure 1 shown, the occipital cervical vertebra distraction measuring device includes: a moving assembly 100, a first distraction rod 200, a second distraction rod 300, a stabilizing assembly 400 and a measuring member 600.

[0045] The first distraction rod 200 and the second distraction rod 300 are installed at both ends of the moving assembly 100, the stabilizing assembly 400 is installed between the first distraction rod 200 and the second distraction rod 300, and the measuring member 600 is connected to the moving assembly 100, the first distraction rod 200 or the second distraction rod 300.

[0046] The moving assembly 100 is used to adjust the distance between the first distraction rod 200 and the second distraction rod 300, the stabilizing assembly 400 is used to provide a supporting force for the first distraction rod 200 and the second distraction rod 300, and the measuring member 600 is used to display the distance between the first distraction rod 200 and the second distraction rod 300.

[0047] One end of the first distraction rod 200 away from the moving assembly 100 is provided with a first acting portion 201, and one end of the second distraction rod 300 away from the moving assembly 100 is provided with a second acting portion 301, wherein the shapes of the first acting portion 201 and the second acting portion 301 are matched with the bones of the predetermined part. In this embodiment, the first acting portion 201 is used to connect the spinous process of the cervical vertebra, and the second acting portion 301 is used to connect the occipital bone.

[0048] Regarding the moving assembly 100, the moving assembly 100 includes: a toothed rod 102, a clamping block 104, a hollow rod 105, a first gear 103 and an operating member 101.

[0049] The operating member 101 includes: a housing 1011 and an adjusting handle 1012.

[0050] The second distraction rod 300 is provided with a through hole 304, as Figure 1 and 4 shown, the hollow rod 105 is provided with a long hole 1051.

[0051] As shown Figure 2 the rack bar 102 is connected to the first spreading bar 200, the clamping block 104 is connected to the first spreading bar 200, the hollow rod 105 is connected to the second spreading bar 300, the rack bar 102 is inserted into the through hole 304 of the second spreading bar 300, and the clamping block 104 is clamped in the long hole 1051 of the hollow rod 105.

[0052] As shown Figure 2 the first gear 103 is arranged in the long hole 1051 of the hollow rod 105, the first gear 103 meshes with the rack bar 102, the housing 1011 is connected to the hollow rod 105, the adjusting handle 1012 is connected to the housing 1011, and the adjusting handle 1012 is connected to the first gear 103.

[0053] When the first gear 103 is rotated by using the adjusting handle 1012, the first gear 103 drives the rack bar 102 to move.

[0054] Among them, the cooperation of the stabilizing component 400, the clamping block 104 and the hollow rod 105, and the meshing of the rack bar 102 and the first gear 103 provide three supporting parts for the first spreading bar 200 and the rack bar 102, so that the moving component 100 can stably adjust the distance between the first spreading bar 200 and the second spreading bar 300. In a further embodiment, the side wall of the rack bar 102 away from the first gear 103 can also abut against the inner wall of the through hole 304 of the second spreading bar 300, so that both ends of the rack bar 102 are respectively matched with the clamping block 104 and the hollow rod 105, and the outer wall of the rack bar 102 is matched with the inner wall of the through hole 304 of the second spreading bar 300, which can further limit the rack bar 102 and improve the stability and accuracy of the distance adjustment between the first spreading bar 200 and the second spreading bar 300.

[0055] It is also possible to make the clamping block 104 and the end of the hollow rod 105 away from the second spreading bar 300 have a predetermined distance. When in use, the end of the hollow rod 105 can be held by hand for use, which not only simplifies the device structure but also facilitates use and improves the use stability. A handle can also be installed on the hollow rod 105 and / or the operating member 101 to facilitate use and improve the use stability.

[0056] Among them, the clamping block 104 is an "I"-shaped structure as shown Figure 1 and 3 Two inner walls of the clamping block 104 abut against the outer wall of the hollow rod 105, and two outer walls of the clamping block 104 abut against the inner wall of the hollow rod 105, so that the clamping block 104 slides in the long hole 1051 of the hollow rod 105. By the "I"-shaped structure, the clamping block 104 slides in the long hole 1051 of the hollow rod 105, which can limit the clamping block 104 in four directions of up, down, left and right, and further improves the stability when adjusting the distance between the first spreading bar 200 and the second spreading bar 300.

[0057] Regarding the operating member 101, as Figure 7 shown, the operating member 101 further includes: a second gear 1014, an adjusting paddle 1015, a limiting paddle 1016, a one-way spring 1017, and a paddle handle 1013.

[0058] The second gear 1014, the adjusting paddle 1015, the limiting paddle 1016, and the one-way spring 1017 are disposed within the housing 1011. The second gear 1014 is connected to the adjusting handle 1012. The paddle handle 1013 is connected to the housing 1011, and the paddle handle 1013 is connected to the adjusting paddle 1015.

[0059] Two one-way springs 1017 and two limiting paddles 1016 are disposed on both sides inside the housing 1011. One end of the two limiting paddles 1016 is rotatably connected to the housing 1011. The two limiting paddles 1016 are disposed between the two one-way springs 1017. The adjusting paddle 1015 is disposed between the two limiting paddles 1016. The one-way spring 1017 is used to apply a force towards the gear direction to the limiting paddle 1016, so that the end of the limiting paddle 1016 can be engaged with the second gear 1014 to limit the rotation direction of the second gear 1014.

[0060] As Figure 7 shown, the adjusting paddle 1015 is an eccentric wheel provided with an eccentric portion. When the eccentric portion of the adjusting paddle 1015 rotates to a predetermined angle towards one of the limiting paddles 1016, this limiting paddle 1016 is separated from one side of the second gear 1014, and the other limiting paddle 1016 is engaged with the teeth on the other side of the second gear 1014, enabling the second gear 1014 to rotate unidirectionally.

[0061] Among them, the second gear 1014 is coaxially engaged with the first gear 103. As Figure 8 shown, the adjusting handle 1012 is connected to both the first gear 103 and the second gear 1014 through the central shaft 1018. The end of the limiting paddle 1016 that cooperates with the second gear 1014 has an acute angle structure so that it can be engaged into the tooth gaps of the second gear 1014.

[0062] Among them, the first gear 103 can also be a combination of a large gear and a small gear. The small gear can be used as the driving member and connected to the adjusting handle 1012. The large gear can be used as the driven member, meshed with the small gear, and meshed with the rack 102. The second gear 1014 can be coaxially engaged with the large gear or the small gear.

[0063] By cooperating with the adjusting paddle 1015, the limiting paddle 1016 and the one-way spring 1017, the rotation direction of the second gear 1014 can be limited, and when the eccentric part of the adjusting paddle 1015 does not abut against one of the limiting paddles 1016, the second gear 1014 can also be locked, thereby avoiding the problem of arbitrary changes in the distance between the first expansion rod 200 and the second expansion rod 300 during the operation, and further improving the safety of use.

[0064] In this embodiment, it is also possible to Figure 8 As shown, the diameter of the first gear 103 is made larger than the diameter of the second gear 1014, so that the limiting paddle 1016 cooperates with the small-sized second gear 1014. Compared with the limiting paddle 1016 directly cooperating with the large-sized first gear 103, the small-sized second gear 1014 has a smaller tooth spacing, which improves the limiting accuracy of the limiting paddle 1016.

[0065] Regarding the stabilizing assembly 400, as Figure 5 and 6 The stabilizing assembly 400 shown includes a first stabilizing rod 401 , a second stabilizing rod 402 and a stabilizing spring 403 .

[0066] The first stabilizing rod 401 is connected to the first opening rod 200 , the second stabilizing rod 402 is connected to the second opening rod 300 , the stabilizing spring 403 is disposed in the second stabilizing rod 402 , and the first stabilizing rod 401 is inserted into the second stabilizing rod 402 and connected to the stabilizing spring 403 .

[0067] The outer wall size of the first stabilizing bar 401 and the inner wall size of the second stabilizing bar 402 may be clearance-matched, thereby further improving the radial stability of the first stabilizing bar 401 and the second stabilizing bar 402 .

[0068] A step portion may also be provided at the end of the first stabilizing rod 401 so that the end of the first stabilizing rod 401 is inserted into the stabilizing spring 403 and the stabilizing spring 403 is connected to the step portion at the end of the first stabilizing rod 401 , further improving the connection stability between the first stabilizing rod 401 and the stabilizing spring 403 .

[0069] Regarding the first expansion rod 200 and the second expansion rod 300, as shown in FIG. Figures 1 to 4 The first acting portion 201 is a first L-shaped rod, one end of which is connected to the first spreading rod 200 , and the other end of which extends a predetermined distance below the first spreading rod 200 .

[0070] The second action portion 301 is a second L-shaped rod, one end of which is connected to the second spreading rod 300 , and the other end of which extends a predetermined distance below the second spreading rod 300 .

[0071] By making the first action part 201 and the second action part 301 L-shaped rods, a certain distance can be kept between the first and second spreading rods 200 and 300 with larger volumes and the patient, which has the advantage of not blocking the surgical field of view.

[0072] In this embodiment, the occipital axis distraction measuring device further includes: at least one locking bolt 500 .

[0073] One end of the first L-shaped rod is plugged into and matched with the first spreading rod 200 , and / or one end of the second L-shaped rod is plugged into and matched with the second spreading rod 300 .

[0074] The locking bolt 500 is threadedly engaged with the first expansion rod 200 and / or the second expansion rod 300 and is used to fix the first L-shaped rod and / or the second L-shaped rod.

[0075] like Figure 1 and 2 As shown, a locking bolt 500 is provided, the first L-shaped rod is fixedly connected to the first expansion rod 200, one end of the second L-shaped rod is plugged into the second expansion rod 300, and the locking bolt 500 is threadedly engaged with the second expansion rod 300, which is used to fix the second L-shaped rod.

[0076] The locking bolt 500 is threadedly engaged with the first expansion rod 200 and / or the second expansion rod 300, and passes through the first expansion rod 200 and / or the second expansion rod 300 to abut, plug, or threadably engage with the first L-shaped rod and / or the second L-shaped rod to fix the first L-shaped rod and / or the second L-shaped rod.

[0077] By plugging and fitting one end of the first L-shaped rod with the first expansion rod 200, and / or plugging and fitting one end of the second L-shaped rod with the second expansion rod 300, and fixing the first L-shaped rod and / or the second L-shaped rod with the locking bolt 500, the first L-shaped rod and the first expansion rod 200 can be telescopic, and / or the second L-shaped rod and the second expansion rod 300 can be telescopic, so as to achieve adjustment of the length of the first action portion 201 and / or the second action portion 301 to adapt to the anatomical differences between different individuals.

[0078] The ends of the first L-shaped rod and the second L-shaped rod may both be provided with clamping blocks 202, so that the occipital axis distraction measuring device can be used to distract other parts of the vertebrae.

[0079] In this embodiment, if Figure 1 and 2 As shown, one end of the first L-shaped rod extending downward from the first spreading rod 200 is provided with a clamping block 202, and the clamping block 202 is used to be clamped on the spinous process of the axis vertebra.

[0080] like Figure 2The end of the second L-shaped rod extending downward from the second spreading rod 300 is provided with an anchoring module 302, and the anchoring module 302 is used to anchor the occipital bone.

[0081] In this embodiment, if Figure 1 and 2 The clamp block 202 shown is provided with at least two locking protrusions 203 at one end away from the anchoring module 302. The cross-section of the locking protrusions 203 is a trapezoidal structure. A locking groove is formed between adjacent locking protrusions 203, and the locking groove is used to be locked in the spinous process of the axis vertebra.

[0082] like Figure 2 The anchoring module 302 shown is provided with an anchoring protrusion 303 at one end away from the clamping block 202. The anchoring protrusion 303 is a conical structure or a pyramidal structure with a triangular cross-section. The anchoring protrusion 303 is used to anchor the occipital bone.

[0083] The slot is matched with the spinous process of the axis vertebra, and the anchoring protrusion 303 is matched with the shape of the occipital bone.

[0084] In such Figure 1 and 2 In the illustrated embodiment, the cross section of the locking protrusion 203 is a trapezoidal structure, and the cross section of the locking protrusion 203 extends a predetermined distance in the direction of the first L-shaped rod extending one end below the first opening rod 200, such as Figure 1 and 2 As shown, two latching protrusions 203 with a trapezoidal cross-section are provided to form a latching slot, and the cross-sectional shape of the latching slot can be a trapezoid or a triangle.

[0085] By clamping the clamp block 202 on the axis spinous process and anchoring the anchor module 302 on the occipital bone, the connection between the distraction measuring device and the axis spinous process and the occipital bone is more stably connected during the distraction of the atlantoaxial lateral joint space, further achieving stable and accurate distraction of the atlantoaxial lateral joint space.

[0086] Regarding the measuring member 600, Figure 2 The measuring member 600 shown is a scale mounted on the gear rod 102 .

[0087] A pointer can be set to cooperate with the scale, or the scale can be combined with the edge of the second expansion rod 300 to accurately see the scale, further reducing the processing steps. The scale has a simple structure, low failure rate, low cost and can clearly display the expansion height, avoiding damage to bones or soft tissues caused by excessive expansion.

[0088] Working principle: adjust the paddle 1015 handle 1013 so that the first gear 103 and the second gear 1014 can only rotate in one direction, rotate the adjustment handle 1012, and the first gear 103 and the second gear 1014 will rotate accordingly. The first gear 103 drives the gear rod 102 and the first expansion rod 200 to move toward the second expansion rod 300, compressing the stabilizing spring 403, shortening the distance between the first expansion rod 200 and the second expansion rod 300, and then placing the entire device in the surgical area.

[0089] When in use, after aligning the slot of the first spreading rod 200 with the spinous process of the axis vertebra, adjust the paddle 1015 handle 1013, and the paddle 1015 rotates accordingly, and the rotating adjusting paddle 1015 abuts against another limiting paddle 1016. The adjusting handle 1012 is rotated, and the first gear 103 and the second gear 1014 rotate accordingly, and the first gear 103 drives the gear rod 102 to move away from the second spreading rod 300, and the gear rod 102 moves in the through hole 304 of the second spreading rod 300, and the block 104 moves in the long hole 1051 of the hollow rod 105, and the length of the stabilizing spring 403 becomes longer, and the distance between the first spreading rod 200 and the second spreading rod 300 increases.

[0090] As Figure 1 and 2 As shown, a locking bolt 500 is provided, the first L-shaped rod is fixedly connected to the first spread rod 200, one end of the second L-shaped rod is plugged into the second spread rod 300, and the locking bolt 500 is threaded into the second spread rod 300, which is used to fix the second L-shaped rod. For example, when the anchoring module 302 is close to the occipital plate, according to individual differences, the locking bolt 500 is loosened, and the extension length of the second L-shaped rod is adjusted to make the selection of the anchoring point more stable. After using the locking bolt 500 to fix the second L-shaped rod, continue to use the adjustment handle 1012. When the anchoring module 302 just anchors the occipital plate, observe the scale scale, continue to use the adjustment handle 1012 and observe the scale scale. When the scale reaches the target height, stop rotating the adjustment handle 1012. The above steps achieve stable and precise distraction of the lateral joint space of the atlantoaxial vertebra.

[0091] As described above, although the present invention has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. An occipital-atlantal distraction and measurement device, characterized in that, Comprising: A moving component, a first expanding rod, a second expanding rod, a stabilizing component, and a measuring component; The first expanding rod and the second expanding rod are installed at both ends of the moving component, the stabilizing component is installed between the first expanding rod and the second expanding rod, and the measuring component is connected to the moving component, the first expanding rod, or the second expanding rod; The moving component is used to adjust the distance between the first expanding rod and the second expanding rod, the stabilizing component is used to provide a supporting force for the first expanding rod and the second expanding rod, and the measuring component is used to display the distance between the first expanding rod and the second expanding rod; One end of the first expanding rod away from the moving component is provided with a first acting portion, and one end of the second expanding rod away from the moving component is provided with a second acting portion; The moving component includes: a toothed rod, a clamping block, a hollow rod, a first gear, and an operating member; The operating member includes: a housing and an adjusting handle; The second expanding rod is provided with a through hole, and the hollow rod is provided with a long hole; The toothed rod is connected to the first expanding rod, the clamping block is connected to the first expanding rod, the hollow rod is connected to the second expanding rod, the toothed rod is inserted into the through hole of the second expanding rod, and the clamping block is clamped in the long hole of the hollow rod; The first gear is arranged in the long hole of the hollow rod, the first gear meshes with the toothed rod, the housing is connected to the hollow rod, the adjusting handle is connected to the housing, and the adjusting handle is connected to the first gear; When the first gear is rotated by using the adjusting handle, the first gear drives the toothed rod to move; The operating member further includes: a second gear, an adjusting dial, a limiting dial, a one-way spring, and a dial handle; The second gear, the adjusting dial, the limiting dial, and the one-way spring are arranged inside the housing, the second gear is connected to the adjusting handle, the dial handle is connected to the housing, and the dial handle is connected to the adjusting dial; Two of the one-way springs and two of the limiting dials are arranged on both sides inside the housing. One end of each of the two limiting dials is rotatably connected to the housing. The two limiting dials are arranged between the two one-way springs. The adjusting dial is arranged between the two limiting dials. The one-way spring is used to apply a force towards the gear direction to the limiting dial, so that the end portion of the limiting dial can be inserted into the second gear to limit the rotation direction of the second gear; The adjusting dial is an eccentric wheel provided with an eccentric portion. When the eccentric portion of the adjusting dial rotates towards one of the limiting dials to a predetermined angle, the limiting dial is separated from the second gear, enabling the second gear to rotate unidirectionally.

2. The occipital-atlantal distraction measurement device according to claim 1, wherein The stabilizing component includes: a first stabilizing rod, a second stabilizing rod, and a stabilizing spring; The first stabilizing rod is connected to the first expanding rod, the second stabilizing rod is connected to the second expanding rod, the stabilizing spring is arranged inside the second stabilizing rod, and the first stabilizing rod is inserted into the second stabilizing rod and connected to the stabilizing spring; 3. The occipital-cervical vertebral distraction measurement device according to claim 1, characterized in that, The first acting portion is a first L-shaped rod. One end of the first L-shaped rod is connected to the first expanding rod, and the other end extends downward from the first expanding rod by a predetermined distance; The second acting portion is a second L-shaped rod. One end of the second L-shaped rod is connected to the second expanding rod, and the other end extends downward from the second expanding rod by a predetermined distance.

4. The occipital-atlantal distraction measurement device according to claim 3, wherein Further comprising: At least one locking bolt; One end of the first L-shaped rod is plugged into the first spread rod, and / or one end of the second L-shaped rod is plugged into the second spread rod; The locking bolt is threadedly engaged with the first expansion rod and / or the second expansion rod, and is used to fix the first L-shaped rod and / or the second L-shaped rod.

5. The occipital-cervical vertebral distraction measurement device according to claim 3, wherein One end of the first L-shaped rod extending downward from the first spreading rod is provided with a clamp block, and the clamp block is used to clamp on the spinous process of the axis vertebra; An anchoring module is provided at one end of the second L-shaped rod extending downward from the second spreading rod, and the anchoring module is used to anchor the occipital bone.

6. The occipital-cervical vertebral distraction measuring device according to claim 5, wherein The clamp block is provided with at least two clamping protrusions at one end away from the anchoring module, the cross section of the clamping protrusion is a trapezoidal structure, and a clamping groove is formed between adjacent clamping protrusions, and the clamping groove is used to clamp on the spinous process of the axis vertebra; An anchoring protrusion is arranged at one end of the anchoring module away from the clamping block. The anchoring protrusion is a conical structure or a pyramidal structure and is used for anchoring the occipital bone.

7. The occipital atlantoaxial distraction measurement device according to claim 1, characterized in that The measuring piece is a scale mounted on the gear rod.

8. The occipital-cervical vertebral distraction measurement device according to claim 1, wherein The clamping block is an I-shaped structure, and the two inner walls of the clamping block abut against the outer wall of the hollow rod, and the two outer walls of the clamping block abut against the inner wall of the hollow rod, so that the clamping block slides in the long hole of the hollow rod.

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