CN112842639A - Universal double offset ring spanner - Google Patents

Universal double offset ring spanner Download PDF

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Publication number
CN112842639A
CN112842639A CN202110126499.0A CN202110126499A CN112842639A CN 112842639 A CN112842639 A CN 112842639A CN 202110126499 A CN202110126499 A CN 202110126499A CN 112842639 A CN112842639 A CN 112842639A
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CN
China
Prior art keywords
connecting block
block
fixed
head
handle
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.)
Granted
Application number
CN202110126499.0A
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Chinese (zh)
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CN112842639B (en
Inventor
解凤宝
史春宝
刘华丰
郝孟娟
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Beijing Chunlizhengda Medical Instruments Co Ltd
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Beijing Chunlizhengda Medical Instruments Co Ltd
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Priority to CN202110126499.0A priority Critical patent/CN112842639B/en
Publication of CN112842639A publication Critical patent/CN112842639A/en
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Publication of CN112842639B publication Critical patent/CN112842639B/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4601—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A61F2002/4638—Tools for performing screwing, e.g. nut or screwdrivers, or particular adaptations therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The application relates to a universal double offset ring spanner, which comprises a handle, a connecting block, a clamping block and an elastic piece; handle (b): one end of the rotating block is hinged with one end of the handle; connecting a block: the two end faces are cylindrical, straight generatrices of the two end faces are perpendicular to each other, the side wall is a plane, and the side wall and the end faces are in smooth transition; a clamping block: one end of the connecting block is provided with a groove structure matched with the head of the screw, the other end of the connecting block is hinged with the connecting block, the rotating axis of the connecting block is perpendicular to the rotating axis of the extension rod, and the rotating axis of the clamping block and the rotating axis of the handle are respectively arranged at the two ends of the connecting block; an elastic member: at least two, and divide locate on extension rod and joint piece, all have one end butt on the different terminal surfaces of connecting block on two elastic component. This application has the effect that can stop the titanium nail at fixed angle.

Description

Universal double offset ring spanner
Technical Field
The application relates to the field of medical equipment, in particular to a universal double offset ring spanner.
Background
Hip replacement surgery is a surgical means for improving diseased hip joints, restoring normal physiological functions, correcting abnormal posture and the like. Currently, in hip replacement surgery, an acetabular prosthesis is often used to replace a diseased hip joint, and in order to enhance the initial stability of the acetabular prosthesis, screws (titanium nails for short) made of titanium alloy are used for fixing.
When the titanium nail is fixed, a universal wrench is needed to be used for operating, the titanium nail is placed at the head of the wrench, the head of the wrench is rotated to an angle matched with the posture of a human body or a bone, then the titanium nail is placed at a position to be screwed, and finally the titanium nail is screwed to achieve the fixing purpose.
In view of the above-mentioned related technologies, the inventor believes that the existing universal wrench prevents the head of the wrench from loosening due to the adoption of a size matching manner between structures, and the head of the wrench is easy to loosen due to the change of the size between the structures caused by friction and fatigue after a period of use, so that the head of the wrench is difficult to fix at a certain angle, that is, the implantation of a titanium nail is inconvenient.
Disclosure of Invention
In order to enable the head of spanner to fix at a fixed angle, the application provides an universal box spanner.
The application provides a pair of universal box spanner adopts following technical scheme:
a universal double offset ring spanner comprises a handle, a connecting block, a clamping block and an elastic piece; handle (b): one end of the rotating block is hinged with one end of the handle; connecting a block: the two end faces are cylindrical, straight generatrices of the two end faces are perpendicular to each other, the side wall is a plane, and the side wall and the end faces are in smooth transition; a clamping block: one end of the connecting block is provided with a groove structure matched with the head of the screw, the other end of the connecting block is hinged with the connecting block, the rotating axis of the connecting block is perpendicular to the rotating axis of the extension rod, and the rotating axis of the clamping block and the rotating axis of the handle are respectively arranged at the two ends of the connecting block; an elastic member: at least two, and divide locate on extension rod and joint piece, all have one end butt on the different terminal surfaces of connecting block on two elastic component.
By adopting the technical scheme, the body posture of the patient in the operation is uncertain, so that the angle between the titanium nail and the handle needs to be changed according to the actual condition when the titanium nail is connected. When using, the user places the titanium nail at the tip of joint piece, make the recess cover on the titanium nail establish the one end that slot structure was seted up to the joint piece, then rotate connecting block and joint piece, make the titanium nail rotate to anticipated angle, two elastic component support respectively at the both ends of connecting block this moment, the static friction between connecting block and hand (hold) and the joint piece has been increased through the mode of increase pressure promptly, make keeping that the joint piece can be stable at current angle, then support the head of titanium nail in the position of treating the screw in, the user can realize the screw in of titanium nail through rotating the hand (hold).
Optionally, the handle includes the extension rod and sets firmly the installation piece in the extension rod tip, sets up first installation cavity on the installation piece, and the installation piece profile is C word form, and the one end of connecting block articulates in first installation cavity.
Through adopting above-mentioned technical scheme, need drive the connecting block through rotating the hand (hold) and with the human body of titanium nail screw in at the operation in-process, through first installation cavity, can strengthen the joint strength between connecting block and the installation piece, through the butt of the inner wall of first installation cavity to the connecting block, reduce the atress of connecting block and the articulated department of installation piece, prolonged life.
Optionally, a second mounting cavity is formed in the clamping block, the clamping block is opposite to the end portion of the connecting block and is in a C-shaped outline shape, and the other end of the connecting block is hinged in the second mounting cavity.
Through adopting above-mentioned technical scheme, need drive connecting block and joint piece through rotating the hand (hold) and with the human body of titanium nail screw in operation in-process, through the second installation cavity, can strengthen the joint strength between connecting block and the joint piece, through the butt of the inner wall of second installation cavity to the connecting block, reduce the atress of connecting block and the articulated department of joint piece, prolonged life.
Optionally, the joint piece includes with connecting block articulated fixed block, with the dead lever of fixed block rigid coupling and set firmly in the fixed head of dead lever one end, the groove structure is seted up on the fixed head, and the dead lever is the undergauge form to the fixed head direction by the fixed block, and the equal smooth transition of lateral wall and the fixed block of dead lever and the lateral wall of fixed head.
Through adopting above-mentioned technical scheme, because the joint piece is direct to be connected with the titanium nail, so the joint piece is nearer apart from human tissue and skeleton, and the dead lever through the undergauge form can reduce the volume of joint piece, reduces the possibility of joint piece and human touching, provides bigger field of vision space for the operator simultaneously, and the operator of being convenient for carries out the screw in work of titanium nail.
Optionally, the elastic element comprises a wave ball screw, and the ball head part of the wave ball screw is opposite to the connecting block.
Through adopting above-mentioned technical scheme, the bulb part of ripples pearl screw can smoothly slide on the terminal surface and the lateral wall of connecting block, and the bulb part of ripples pearl screw can support tightly on the lateral wall of connecting block because of the elasticity that receives the spring simultaneously, can increase the resistance that the connecting block received when rotating through the mode of increase pressure for the connecting block can be stabilized in an angle.
Optionally, the outer wall of the connecting block for the moving of the wave ball screw is U-shaped.
Through adopting above-mentioned technical scheme, link up smooth and easy slip of bulb portion that smooth connecting block outer wall can make the ripples pearl screw, convenient to use user fixes the joint piece in certain angle simultaneously.
Optionally, the groove structure includes a plurality of arc-shaped grooves formed in the side wall of the fixing head, the arc-shaped grooves are evenly distributed along the circumferential direction, the outer side walls of the fixing heads on the two sides of the arc-shaped grooves are cylindrical surfaces, and the end surfaces of the fixing heads are hexagonal plum blossom shapes.
Through adopting above-mentioned technical scheme, the end limit of conventional spanner or screwdriver is far away for straight and thin platelike, and the fixed head tip edge after having seted up the arc wall is the cylinder, and set up thickly for the conventionality, consequently after using a period, the conventionality sets up can lead to smooth silk phenomenon because of wearing and tearing, and the fixed head is because the outer wall of cylinder, make the point of fixed head and titanium nail tip recess inner wall butt be not apart from the nearest point of titanium nail tip recess inner wall contained angle, consequently still have sufficient solid structure and titanium nail tip recess inner wall butt after the fixed head is worn and torn, the possibility that smooth silk phenomenon takes place has been reduced.
Optionally, the fixing head is arranged in a reducing shape from the fixing rod direction to the other end, and the taper is 0.5-1.5 degrees.
Through adopting above-mentioned technical scheme, because the tip recess of titanium nail also has the tapering, so set up the tapering with the fixed head and can make the fixed head more smooth and easy insert the tip recess of titanium nail in, can make fixed head and the better adaptation of titanium nail tip recess simultaneously, strengthen the joint strength between fixed head and the titanium nail.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the posture of the body of the patient is not determined in the operation, so that the angle between the titanium nail and the handle needs to be changed according to the actual situation when the titanium nail is connected. When the titanium nail screwing device is used, a user places the titanium nail at the end part of the clamping block, the groove on the titanium nail is sleeved at one end, provided with the groove structure, of the clamping block, then the connecting block and the clamping block are rotated, the titanium nail is rotated to an expected angle, at the moment, the two elastic pieces are respectively abutted against the two ends of the connecting block, namely, the static friction force among the connecting block, the handle and the clamping block is increased in a pressure increasing mode, the clamping block can be stably kept at the current angle, then the head of the titanium nail is abutted against a position to be screwed in, and the user can realize the screwing in of the titanium nail by rotating the handle;
2. the end limit of conventional spanner or screwdriver is far for straight and thin platelike, and the fixed head tip edge after having seted up the arc wall is the cylinder, and set up thickly for the conventionality, consequently after using a period, the conventionality sets up can lead to smooth silk phenomenon because of wearing and tearing, and the fixed head is because the outer wall of cylinder, make the point of fixed head and titanium nail tip recess inner wall butt not apart from the nearest point of titanium nail tip recess inner wall contained angle, consequently still have sufficient solid structure and titanium nail tip recess inner wall butt after the fixed head is worn and torn, the possibility that smooth silk phenomenon takes place has been reduced.
Drawings
Fig. 1 is a schematic diagram of an embodiment.
Fig. 2 is an exploded view showing the connection relationship between the connection block and the clamping block in the embodiment.
Fig. 3 is a schematic view showing a structure of a fixture head in the embodiment.
Description of reference numerals: 1. a handle; 11. a handle; 12. an extension pole; 13. mounting blocks; 14. a first mounting cavity; 15. an arc surface portion; 2. connecting blocks; 3. a clamping block; 31. a fixed block; 32. fixing the rod; 33. a fixed head; 34. a second mounting cavity; 35. an arc-shaped slot; 4. a bead screw.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses universal box spanner, refers to fig. 1, and includes hand (hold) 1, connecting block 2 and joint piece 3. The handle 1 comprises a handle 11, an extension rod 12 and a mounting block 13, wherein the extension rod 12 is fixedly connected with the handle 11 to form a long and straight rod-shaped structure, and the mounting block 13 is fixedly arranged on the end part of the handle 11 based on the principle of the extension rod 12. Connecting block 2 articulates on installation piece 13 through the round pin axle, and joint piece 3 articulates on connecting block 2 through the round pin axle. The mounting block 13 and the clamping block 3 are respectively arranged at two ends of the connecting block 2. When the connecting block 2 is used as a reference, the rotating axis of the clamping block 3 is vertical to the rotating axis of the mounting block 13.
Referring to fig. 1 and 2, the connecting block 2 includes end faces of two cylindrical surfaces and four straight side walls, wherein each set of two opposite side walls is in smooth transition with one end face, and when the connecting block 2 is arranged along the length direction of the handle 1, the two end faces of the connecting block 2 are respectively opposite to the mounting block 13 and the clamping block 3.
Referring to fig. 2, a first mounting cavity 14 is formed in the mounting block 13, the first mounting cavity 14 enables the contour of the mounting block 13 to be in a C shape with an opening facing away from the handle 11, one end of the connecting block 2 is hinged in the first mounting cavity 14, and two outer side walls of the connecting block 2 abut against two opposite inner side walls of the first mounting cavity 14.
Referring to fig. 1 and 2, the clamping block 3 includes a fixing block 31 hinged to the connecting block 2, a fixing rod 32 fixed on the fixing block 31, and a fixing head 33 fixed on the fixing rod 32. Wherein, the fixed block 31 is provided with a second mounting cavity 34, so that the outline thereof is in a C shape with an opening facing the mounting block 13, the other end of the connecting block 2 is hinged in the second mounting cavity 34, and the other two side walls of the connecting block 2 are respectively abutted against the two opposite side walls in the second mounting cavity 34.
Referring to fig. 2, the mounting block 13 is fixedly provided with a wave ball screw 4, the wave ball screw 4 is arranged along the length direction of the extension rod 12, the pipe body part of the wave ball screw 4 is located inside the solid body of the mounting block 13, and the ball head part of the wave ball screw 4 extends out of the solid body of the mounting block 13 from the first mounting cavity 14 and abuts against one end face of the connecting block 2. The fixed block 31 is also fixedly provided with a wave ball screw 4, a pipe body part of the wave ball screw 4 is positioned inside the solid body of the fixed block 31, a ball head part of the wave ball screw 4 extends out of the solid body of the fixed block 31 from the second mounting cavity 34 and abuts against the other end face of the connecting block 2, namely, the two wave ball screws 4 are relatively distributed on the mounting block 13 and the fixed block 31. The rotation axis of the fixed block 31 is parallel to the straight generatrix of the end surface of the connecting block 2 nearest to the fixed block, and the rotation axis of the mounting block 13 is parallel to the straight generatrix of the end surface of the connecting block 2 nearest to the fixed block, i.e. the sliding surfaces of the connecting blocks 2 respectively provided for the two bead screws 4 are both continuous and smooth U-shaped.
Referring to fig. 2, the end surface of the mounting block 13 facing the fixing block 31 is polished to form an arc surface 15 for reducing the possibility of injury to human body after the originally sharp corner touches human tissue, and similarly, the end surface of the mounting block 13 facing the fixing block 31 is also configured (not shown in the figure).
Referring to fig. 2 and 3, the fixing rod 32 is reduced in diameter from the fixing block 31 to the fixing head 33, and the reduced diameter fixing rod 32 can provide a user with more visual field, and reduce the possibility of touching human tissues by instruments. The fixing head 33 is in a knob shape formed by opening a plurality of arc-shaped grooves 35 on the side wall of a cylindrical block, the end face of the fixing head 33, which faces away from the fixing block 31, is in a hexagonal plum blossom shape, and the side wall of the fixing head 33 is in continuous smooth transition and is in axial symmetry. In order to make the fixing head 33 fit the titanium nail better, the fixing head 33 is arranged in a way of reducing the diameter from the direction of the fixing rod 32 to the other end, and the taper is 1 degree.
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. An universal double offset ring spanner which characterized in that: 1. comprises a handle (1), a connecting block (2), a clamping block (3) and an elastic piece;
handle (1): one end of the connecting block (2) is hinged on the handle (1);
connecting block (2): the two end faces are cylindrical, straight generatrices of the two end faces are perpendicular to each other, the side wall is a plane, and the side wall and the end faces are in smooth transition;
a clamping block (3): one end of the connecting block is provided with a groove structure matched with the head of the screw, the other end of the connecting block is hinged with the connecting block (2), the rotating axis of the connecting block is vertical to the rotating axis of the extension rod (12), and the rotating axis of the clamping block (3) and the rotating axis of the handle (1) are respectively arranged at two ends of the connecting block (2);
an elastic member: at least two, and divide and locate extension rod (12) and joint piece (3) on, all have one end butt on the different terminal surfaces of connecting block (2) on two elastic component.
2. The universal ring spanner of claim 1, wherein: the handlebar (1) comprises an extension rod (12) and a mounting block (13) fixedly arranged at the end part of the extension rod (12), a first mounting cavity (14) is formed in the mounting block (13), the contour of the mounting block (13) is C-shaped, and one end of a connecting block (2) is hinged in the first mounting cavity (14).
3. The universal ring spanner according to claim 1 or 2, wherein: offer second installation cavity (34) on joint piece (3), joint piece (3) just is C word profile form to the tip of connecting block (2), and the other end of connecting block (2) articulates in second installation cavity (34).
4. The universal ring spanner of claim 1, wherein: joint piece (3) include with connecting block (2) articulated fixed block (31), with fixed rod (32) of fixed block (31) rigid coupling and set firmly in fixed head (33) of fixed rod (32) one end, groove structure sets up on fixed head (33), and fixed rod (32) are the undergauge form by fixed block (31) to fixed head (33) direction, and the equal smooth transition of lateral wall and the fixed block (31) of fixed rod (32) and the lateral wall of fixed head (33).
5. The universal ring spanner of claim 1, wherein: the elastic piece comprises a wave ball screw (4), and the ball head part of the wave ball screw (4) is opposite to the connecting block (2).
6. The universal ring spanner of claim 5, wherein: the outline of the outer wall of the connecting block (2) for the moving of the wave ball screw (4) is U-shaped.
7. The universal ring spanner of claim 1, wherein: the groove structure comprises a plurality of arc-shaped grooves (35) formed in the side wall of the fixing head (33), the arc-shaped grooves (35) are evenly distributed along the circumferential direction, the outer side walls of the fixing head (33) on the two sides of the arc-shaped grooves (35) are cylindrical surfaces, and the end faces of the fixing head are hexagonal plum blossom-shaped.
8. The universal ring spanner of claim 1 or 7, wherein: the fixing head (33) is arranged in a reducing shape from the direction of the fixing rod (32) to the other end, and the taper is 0.5-1.5 degrees.
CN202110126499.0A 2021-01-29 2021-01-29 Universal double offset ring spanner Active CN112842639B (en)

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Application Number Priority Date Filing Date Title
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CN112842639B CN112842639B (en) 2023-09-01

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US20190350631A1 (en) * 2018-05-17 2019-11-21 b-ONE Ortho, Corp. Screw driver system
US20200101585A1 (en) * 2018-10-01 2020-04-02 Yuan Li Hsing Industrial Co., Ltd. Two-stage universal joint
CN211583458U (en) * 2020-01-03 2020-09-29 陈立军 Universal screwdriver for tail cap of orthopedic intramedullary nail
CN211674508U (en) * 2019-12-23 2020-10-16 苏州微创脊柱创伤医疗科技有限公司 Spanner

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Inventor after: Wei Zhangli

Inventor after: Xie Fengbao

Inventor after: Shi Chunbao

Inventor after: Liu Huafeng

Inventor after: Hao Mengjuan

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