CN209826920U - Percutaneous vertebral fracture reduction device - Google Patents
Percutaneous vertebral fracture reduction device Download PDFInfo
- Publication number
- CN209826920U CN209826920U CN201920529360.9U CN201920529360U CN209826920U CN 209826920 U CN209826920 U CN 209826920U CN 201920529360 U CN201920529360 U CN 201920529360U CN 209826920 U CN209826920 U CN 209826920U
- Authority
- CN
- China
- Prior art keywords
- swinging mechanism
- clamping device
- connecting rod
- clamping
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model provides a percutaneous vertebral fracture reduction device, which comprises a first clamping device, a second clamping device and a connecting rod; the first clamping device is sleeved on the connecting rod; the second clamping device is sleeved on the connecting rod; the first clamping device and the second clamping device can slide on the connecting rod relatively; the first clamping device comprises a first up-down swinging mechanism and a first left-right swinging mechanism; the second clamping device comprises a second up-down swinging mechanism and a second left-right swinging mechanism; and a stop structure for preventing rotation is further arranged at the rotary connection position of the first up-down swinging mechanism and/or the rotary connection position of the second up-down swinging mechanism. The utility model provides a pair of percutaneous centrum fracture resetting means, through with two spinal pedicle screws go into two upper and lower normal vertebras of fracture centrum, to the fracture centrum prying and dialling down the reduction, reinjection bone cement, the device is simple, economy, practical, and easily promotes.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to percutaneous vertebral body fracture resetting means.
Background
The percutaneous puncture minimally invasive treatment of vertebral compression fracture usually adopts the following treatment methods: percutaneous Vertebroplasty (PVP); percutaneous balloon kyphoplasty (PKP); and the kyphoplasty of the percutaneous sky dilated vertebral body. Since the report of Percutaneous Vertebroplasty (PVP) by Galibert in 1987, the PVP is widely applied to osteoporotic vertebral compression fracture, and good pain relieving and vertebral body strengthening effects are achieved. In 2000, Wong et al first reported percutaneous aspiration, placing an expandable balloon in a collapsed vertebral body, elevating the end plate by expanding the balloon, and injecting bone cement into the vertebral body to strengthen the vertebral body, so that most of the original height of the diseased vertebra is restored, and the kyphoplasty of the spine is partially corrected, i.e., percutaneous balloon-expanded kyphoplasty (PKP). The Sky bone expander system developed by Israel Disc-O-Tech company is applied to kyphoplasty, the Sky bone expander is inserted into a collapsed vertebral body through a working channel, the collapsed vertebral body is folded out by high polymer around the crease of the axis to achieve the expanding effect, so that the fractured vertebral body is reset, a cavity with the diameter of 14mm is expanded in the vertebral body, then a rotating device is used for restoring the polymer material folded by the crease into a flat state and pulling out the polymer material from the vertebral body, and then bone cement is injected into the vertebral body, and the function of the bone expander system is similar to that of a balloon. Except that polymer folds out instead of balloon inflation.
Percutaneous Vertebroplasty (PVP) only fixes original deformity, can not restore the height of the vertebral body that sinks, can not correct the kyphotic deformity of the vertebral body, even can effectively alleviate pain, the persistence of kyphotic deformity can lead to the respiratory and digestive system function of the patient to descend, and the quality of life is reduced. The expandable balloon and the sky bone dilator are both expanded in the pathological vertebral body, the resistance is large, and the expansion space is limited; and the operation cost of the kyphoplasty is high, the operation method is complex, and the popularization and the promotion are difficult to a certain extent.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a pair of percutaneous vertebral body fracture resetting means has solved the operation cost height that exists in current medical equipment to the treatment of centrum compression fracture, the complicated technical problem of operation method.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a percutaneous vertebral fracture reduction device comprises a first clamping device, a second clamping device and a connecting rod; the first clamping device is sleeved on the connecting rod and used for clamping the first pedicle screw; the second clamping device is sleeved on the connecting rod and used for clamping a second pedicle screw; the first clamping device and the second clamping device can slide on the connecting rod relatively; the first clamping device comprises a first up-and-down swinging mechanism and a first left-and-right swinging mechanism, one end of the first up-and-down swinging mechanism is sleeved on the connecting rod, the other end of the first up-and-down swinging mechanism is rotationally connected with the first left-and-right swinging mechanism, the first up-and-down swinging mechanism is used for driving the first pedicle screw to swing up and down, and the first left-and-right swinging mechanism is used for driving the first pedicle screw to swing left and right; the second clamping device comprises a second up-and-down swinging mechanism and a second left-and-right swinging mechanism, one end of the second up-and-down swinging mechanism is sleeved on the connecting rod, the other end of the second up-and-down swinging mechanism is rotatably connected with the second left-and-right swinging mechanism, the second up-and-down swinging mechanism is used for driving the second pedicle screw to swing up and down, and the first left-and-right swinging mechanism is used for driving the second pedicle screw to swing left and right; and a stop structure for preventing rotation is further arranged at the rotary connection position of the first up-down swinging mechanism and/or the rotary connection position of the second up-down swinging mechanism.
Optionally, the first up-down swinging mechanism comprises a connecting block, a connecting shaft, a rotating block and a locking cap; the bottom end of the connecting block is sleeved on the connecting rod, and the top end of the connecting block is connected with the connecting shaft; the bottom end of the rotating block is sleeved on the connecting shaft and can rotate around the connecting shaft; the locking cap is in threaded connection with the connecting shaft and used for enabling the rotating block to be mutually abutted to the connecting block.
Optionally, a plurality of ratchets uniformly distributed around the circumference are arranged on two surfaces of the bottom end of the rotating block and the connecting block, which are capable of abutting against each other, and the ratchets on the two surfaces can be meshed with each other.
Optionally, the first left-right swinging mechanism comprises a clamping block, a connecting shaft, a locking cap and a handle nut; the connecting shaft is arranged at the top end of the rotating block; the clamping block is sleeved on the connecting shaft and can rotate around the connecting shaft; the locking cap is in threaded connection with the connecting shaft and is used for enabling the clamping block to be in mutual interference with the rotating block; the clamping block is further provided with a clamping hole for clamping the pedicle screw and a threaded hole for locking the pedicle screw, and the handle nut is in threaded connection with the threaded hole.
Optionally, a locking hole is further formed in the bottom end of the connecting block; the connecting rod is provided with a limiting groove.
Optionally, the second clamping device is identical in structure to the first clamping device.
Optionally, the second up-down swinging mechanism comprises a connecting sleeve and two locking nuts; the connecting sleeve is sleeved on the connecting rod and can slide left and right along the connecting rod; the two locking nuts are in threaded connection with the connecting rod, and the connecting sleeve is located between the two locking nuts.
Optionally, a stop structure for preventing rotation is further disposed at the rotational connection position of the first up-down swinging mechanism and/or the rotational connection position of the second up-down swinging mechanism.
According to the above technical scheme, the beneficial effects of the utility model are that:
the utility model provides a percutaneous vertebral fracture reduction device, which comprises a first clamping device, a second clamping device and a connecting rod; the first clamping device is sleeved on the connecting rod; the second clamping device is sleeved on the connecting rod; the first clamping device and the second clamping device can slide on the connecting rod relatively; the first clamping device comprises a first up-down swinging mechanism and a first left-right swinging mechanism; the second clamping device comprises a second up-down swinging mechanism and a second left-right swinging mechanism; and a stop structure for preventing rotation is further arranged at the rotary connection position of the first up-down swinging mechanism and/or the rotary connection position of the second up-down swinging mechanism. The utility model provides a pair of percutaneous centrum fracture resetting means, through with two spinal pedicle screws go into two upper and lower normal vertebras of fracture centrum, to the fracture centrum prying and dialling down the reduction, reinjection bone cement, the device is simple, economy, practical, and easily promotes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic perspective view of a percutaneous vertebral fracture reduction device according to a first embodiment;
FIG. 2 is an exploded view of the first up-down swing mechanism;
FIG. 3 is an exploded view of the first yaw mechanism;
FIG. 4 is a schematic perspective view of a second vertical swing mechanism;
FIG. 5 is a schematic perspective view of a percutaneous vertebral fracture reduction device in accordance with a second embodiment;
FIG. 6 is a schematic view of the operation principle of the percutaneous vertebral fracture reduction device;
reference numerals:
1-a first clamping device, 2-a second clamping device and 3-a connecting rod;
11-a first up-and-down swinging mechanism, 12-a first left-and-right swinging mechanism, 13-a first pedicle screw, 21-a second up-and-down swinging mechanism, 22-a second left-and-right swinging mechanism, 23-a second pedicle screw and 31-a limiting groove;
111-connecting block, 112-connecting shaft, 113-rotating block, 114-locking cap, 115-ratchet, 116-locking hole, 121-clamping block, 122-clamping hole, 123-threaded hole, 124-handle nut, 211-connecting sleeve and 212-locking nut.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
In the description of the present application, it is to be understood that the terms "bottom", "top", "up and down", "left and right", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.
Referring to fig. 1 and 6, the percutaneous vertebral fracture reduction device provided by the present invention comprises a first holding device 1, a second holding device 2 and a connecting rod 3; the first clamping device 1 is sleeved on the connecting rod 3 and used for clamping a first pedicle screw 13; the second clamping device 2 is sleeved on the connecting rod 3 and used for clamping a second pedicle screw 23; the first clamping device 1 and the second clamping device 2 can slide on the connecting rod 3 relatively; the first clamping device 1 comprises a first up-and-down swinging mechanism 11 and a first left-and-right swinging mechanism 12, the bottom end of the first up-and-down swinging mechanism 11 is fixedly sleeved on the connecting rod 3, the top end of the first up-and-down swinging mechanism 11 is rotatably connected with the first left-and-right swinging mechanism 12, the first up-and-down swinging mechanism 11 is used for driving the first pedicle screw 13 to swing up and down, and the first left-and-right swinging mechanism 12 is used for driving the first pedicle screw 13 to swing left and right; the second clamping device 2 comprises a second up-down swinging mechanism 21 and a second left-right swinging mechanism 22, the bottom end of the second up-down swinging mechanism 21 is sleeved on the connecting rod 3, the top end of the second up-down swinging mechanism 21 is rotatably connected with the second left-right swinging mechanism 22, the second up-down swinging mechanism 21 is used for driving the second pedicle screw 23 to swing up and down, and the first left-right swinging mechanism 12 is used for driving the second pedicle screw 23 to swing left and right. The using method of the device comprises the following steps: firstly, a first pedicle screw 13 is nailed into a normal vertebral body above a compression fracture vertebral body, and a second pedicle screw 23 is nailed into a normal vertebral body below the compression fracture vertebral body; secondly, two pedicle screws are respectively clamped by using the percutaneous vertebral fracture reduction device; then, the included angle of the two pedicle screws is adjusted through up-and-down swinging and/or left-and-right swinging, namely the fractured vertebral body is reset under prying; then injecting bone cement into the fractured vertebral body; and finally, taking down the two pedicle screws after the fractured vertebral body is repaired. When the device is used for percutaneous vertebral compression fracture reduction surgery, the operation is simple, the cost is low, and the effect is good.
As a further improvement to the above solution, referring to fig. 2, the first upward and downward swinging mechanism 11 includes a connecting block 111, a connecting shaft 112, a rotating block 113, and a locking cap 114. The bottom end of the connecting block 111 is sleeved on the connecting rod 3, and the top end of the connecting block 111 is connected with the connecting shaft 112, specifically, the connecting block 111 and the connecting rod 3 can be integrated, or can be assembled after being separated. The bottom end of the rotating block 113 is sleeved on the connecting shaft 112 and can rotate around the connecting shaft 112; the locking cap 114 is threadedly coupled to the coupling shaft 112 for allowing the rotation block 113 to interfere with the connection block 111. When the pedicle screw is used, the locking cap 114 is firstly unscrewed, the position of the first pedicle screw is well adjusted by rotating the rotating block 113, then the locking cap 114 is screwed down, the rotating block 113 and the connecting block 111 are mutually abutted by thread force, so that the locking cap 114 and the connecting block 111 clamp the rotating block 113, and the rotation of the rotating block 113 is limited. In one embodiment, a plurality of ratchet teeth 115 are uniformly distributed around the circumference of the connecting block 111 on two surfaces of the bottom end of the rotating block 113, which are abutted against each other, and the ratchet teeth 115 on the two surfaces can be engaged with each other, so that the rotating block 113 is limited to rotate through the engagement.
As a further improvement to the above solution, referring to fig. 3, the first right-left swinging mechanism 12 includes a clamping block 121, a connecting shaft 112, a locking cap 114 and a handle nut 124. The connecting shaft 112 is mounted on the top end of the rotating block 113. The clamping block 121 is sleeved on the connecting shaft 112 and can rotate around the connecting shaft 112. The locking cap 114 is in threaded connection with the connecting shaft 112, and is used for enabling the clamping block 121 to be abutted against the rotating block 113, and enabling the clamping block 121 to be abutted against the rotating block 113 through a threaded force, so that the clamping block 121 is clamped by the locking cap 114 and the rotating block 113, the rotation of the clamping block 121 is limited, and when the locking cap 114 is not screwed down, the clamping block 121 can rotate. The clamping block 121 is further provided with a clamping hole 122 for clamping the pedicle screw and a threaded hole 123 for locking the pedicle screw, and the handle nut 124 is in threaded connection with the threaded hole 123.
As a further improvement to the above scheme, please refer to fig. 5, the bottom end of the connecting block 111 is further provided with a locking hole 116; the connecting rod 3 is provided with a limiting groove 31. Specifically, the locking hole 116 is in threaded connection with the handle nut 124, and the width of the limiting groove 31 is the same as the nut diameter of the handle nut 124, so that when the handle nut 124 is screwed in through the locking hole 116 to abut against the bottom of the limiting groove 31, the whole freedom degree of the connecting block 111 is limited. The second clamping device 2 has the same structure as the first clamping device 1, and is good in interchangeability and convenient to manufacture.
As a further improvement to the above solution, referring to fig. 1 and 4, the second up-down swinging mechanism 21 includes a connecting sleeve 211 and two lock nuts 212; the connecting sleeve 211 is sleeved on the connecting rod 3 and can slide left and right along the connecting rod 3; the two lock nuts 212 are in threaded connection with the connecting rod 3, and the connecting sleeve 211 is located between the two lock nuts 212. The coupling sleeve 211 is clamped against the lock by two lock nuts 212, limiting its full freedom. Preferably, the outer circumferential surface of the locking nut 212 is provided with a plurality of small holes, which facilitates the use of a tool to increase the locking force, such as a hexagonal wrench. Preferably, the outer circumferential surface of the lock nut 212 is knurled to increase friction.
As a further improvement to the above solution, please refer to fig. 2-4, a stop structure for preventing rotation is further disposed at the rotational connection position of the first vertical swing mechanism 11 and/or the rotational connection position of the second vertical swing mechanism 21. The stop mechanism is that the ratchets 115 which can be meshed with each other are added on the rotating contact surface, the possibility of relative rotation of the contact surface is further limited through the meshing of the ratchets 115, and the displacement of the set pedicle screws caused by the looseness of the locking cap 114 or insufficient locking force is avoided, so that the operation effect is not influenced.
As a further improvement to the above scheme, the connecting shaft 112, the locking cap 114 and the handle nut 124 are all universal pieces, so that the manufacture and the assembly are convenient.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. A percutaneous vertebral fracture reduction device is characterized in that: comprises a first clamping device (1), a second clamping device (2) and a connecting rod (3); the first clamping device (1) is sleeved on the connecting rod (3) and used for clamping a first pedicle screw (13); the second clamping device (2) is sleeved on the connecting rod (3) and used for clamping a second pedicle screw (23); the first clamping device (1) and the second clamping device (2) can slide on the connecting rod (3) relatively; the first clamping device (1) comprises a first up-and-down swinging mechanism (11) and a first left-and-right swinging mechanism (12), one end of the first up-and-down swinging mechanism (11) is sleeved on the connecting rod (3), the other end of the first up-and-down swinging mechanism (11) is rotatably connected with the first left-and-right swinging mechanism (12), the first up-and-down swinging mechanism (11) is used for driving the first pedicle screw (13) to swing up and down, and the first left-and-right swinging mechanism (12) is used for driving the first pedicle screw (13) to swing left and right; second clamping device (2) include second luffing motion (21) and second horizontal hunting mechanism (22), the one end suit of second luffing motion (21) is in on connecting rod (3), the other end and the second horizontal hunting mechanism (22) swivelling joint of second luffing motion (21), second luffing motion (21) are used for ordering about second pedicle of vertebral arch nail (23) luffing motion, first horizontal hunting mechanism (12) are used for ordering about second pedicle of vertebral arch nail (23) horizontal hunting.
2. The percutaneous vertebral fracture reduction device of claim 1, wherein: the first up-down swinging mechanism (11) comprises a connecting block (111), a connecting shaft (112), a rotating block (113) and a locking cap (114); the bottom end of the connecting block (111) is sleeved on the connecting rod (3), and the top end of the connecting block is connected with the connecting shaft (112); the bottom end of the rotating block (113) is sleeved on the connecting shaft (112) and can rotate around the connecting shaft (112); the locking cap (114) is in threaded connection with the connecting shaft (112) and is used for enabling the rotating block (113) and the connecting block (111) to be mutually abutted.
3. The percutaneous vertebral fracture reduction device of claim 2, wherein: a plurality of ratchets (115) which are uniformly distributed around the circumference are arranged on two mutually abutted surfaces between the bottom end of the rotating block (113) and the connecting block (111), and the ratchets (115) on the two surfaces can be mutually meshed.
4. The percutaneous vertebral fracture reduction device of claim 3, wherein: the first left-right swinging mechanism (12) comprises a clamping block (121), a connecting shaft (112), a locking cap (114) and a handle nut (124); the connecting shaft (112) is arranged at the top end of the rotating block (113); the clamping block (121) is sleeved on the connecting shaft (112) and can rotate around the connecting shaft (112); the locking cap (114) is in threaded connection with the connecting shaft (112) and is used for enabling the clamping block (121) and the rotating block (113) to be mutually abutted; the clamping block (121) is further provided with a clamping hole (122) for clamping the pedicle screw and a threaded hole (123) for locking the pedicle screw, and the handle nut (124) is in threaded connection with the threaded hole (123).
5. The percutaneous vertebral fracture reduction device of claim 4, wherein: the bottom end of the connecting block (111) is also provided with a locking hole (116); the connecting rod (3) is provided with a limiting groove (31).
6. The percutaneous vertebral fracture reduction device of claim 5, wherein: the second clamping device (2) has the same structure as the first clamping device (1).
7. The percutaneous vertebral fracture reduction device of claim 1, wherein: the second up-and-down swinging mechanism (21) comprises a connecting sleeve (211) and two locking nuts (212); the connecting sleeve (211) is sleeved on the connecting rod (3) and can slide left and right along the connecting rod (3); the two locking nuts (212) are in threaded connection with the connecting rod (3), and the connecting sleeve (211) is located between the two locking nuts (212).
8. The percutaneous vertebral fracture reduction device of claim 1, wherein: and a stopping structure for preventing rotation is further arranged at the rotary connection position of the first up-down swinging mechanism (11) and/or the rotary connection position of the second up-down swinging mechanism (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920529360.9U CN209826920U (en) | 2019-04-18 | 2019-04-18 | Percutaneous vertebral fracture reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920529360.9U CN209826920U (en) | 2019-04-18 | 2019-04-18 | Percutaneous vertebral fracture reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209826920U true CN209826920U (en) | 2019-12-24 |
Family
ID=68912589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920529360.9U Expired - Fee Related CN209826920U (en) | 2019-04-18 | 2019-04-18 | Percutaneous vertebral fracture reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209826920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114617624A (en) * | 2022-03-09 | 2022-06-14 | 四川大学华西医院 | Lifting reduction auxiliary device for femoral shaft fracture operation |
-
2019
- 2019-04-18 CN CN201920529360.9U patent/CN209826920U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114617624A (en) * | 2022-03-09 | 2022-06-14 | 四川大学华西医院 | Lifting reduction auxiliary device for femoral shaft fracture operation |
| CN114617624B (en) * | 2022-03-09 | 2023-05-23 | 四川大学华西医院 | Lifting and resetting auxiliary device for femoral shaft fracture operation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200315663A1 (en) | Derotation apparatus for treating spinal irregularities | |
| US10299830B2 (en) | Clamping assembly for external fixation system | |
| US8518085B2 (en) | Adaptive spinal rod and methods for stabilization of the spine | |
| EP1898817A2 (en) | Orthopedic implant apparatus | |
| US20190262041A1 (en) | Low profile connectors | |
| CN209826920U (en) | Percutaneous vertebral fracture reduction device | |
| WO2009038972A1 (en) | Orthopedic implant apparatus | |
| EP3616635A1 (en) | Bone anchor assembly | |
| CN111902098B (en) | Split dynamic and static two-purpose pedicle screw and mounting tool thereof | |
| CN105250017B (en) | A kind of orthopedic rod connector that multidirectional offer angle compensation is provided | |
| CN200998297Y (en) | Joint coupling for the fixing operation of occipital cervical vertebra | |
| CN209611270U (en) | Rest the head on the fixed device of neck | |
| CN219323475U (en) | Adjustable fixing device of backbone centrum | |
| WO1999025265A1 (en) | Stable dynamic axial fixator | |
| CN210121168U (en) | Medical supporting and pressurizing device and pedicle screw fixing system | |
| CN105250018B (en) | It is a kind of that Orthopedic rod can be made freely to stretch and with the connector of angle compensation function | |
| CN109464181A (en) | Rest the head on the fixed device of neck | |
| CN2524700Y (en) | Spine dilation reset inner fixer | |
| CN213787718U (en) | High-stability bone anchor for plastic surgery | |
| CN215839418U (en) | Multi freedom fracture reduction fixing device | |
| CN202426573U (en) | Bended wrench | |
| CN210205022U (en) | Electric spine rehabilitation bed | |
| CN211911777U (en) | Vertebral pedicle screw capable of correcting kyphosis deformity and vertebral pedicle screw group | |
| CN217430137U (en) | Internal fixing system and pedicle screw | |
| CN220236998U (en) | Aiming positioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 Termination date: 20210418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |