CN203506775U - Turnover retractor - Google Patents
Turnover retractor Download PDFInfo
- Publication number
- CN203506775U CN203506775U CN201320499207.9U CN201320499207U CN203506775U CN 203506775 U CN203506775 U CN 203506775U CN 201320499207 U CN201320499207 U CN 201320499207U CN 203506775 U CN203506775 U CN 203506775U
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- China
- Prior art keywords
- bearing
- engaging lug
- lever arm
- fixed arm
- blade
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- Expired - Fee Related
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Abstract
The utility model discloses a turnover retractor. Bearings are arranged on hinge pins in a sleeve mode and located on the two sides of a fixed arm blade connecting lug and a movable arm blade connecting lug, a fixed arm blade is connected with a fixed arm in a pivoting mode through one hinge pin, and a movable arm blade is connected with a movable arm in a pivoting mode through the other hinge pin. Each bearing comprises a bearing gasket and bearing beads. A pin hole is formed in the center of each bearing gasket and used for penetrating one hinge pin, square holes are formed in the periphery of each bearing gasket and used for embedding the bearing beads, first symmetrical axes, passing through the centers of the square holes, of the square holes are arranged in the radial direction of the pin holes, and the bearing beads are embedded into the square holes in the direction where the center lines of the bearing beads are basically in accordance with the first axles. The diameter of the bearing beads is larger than the thickness of the bearing gaskets, so that the surfaces of the bearing beads directly make contact with the end faces of the corresponding connecting lugs. The turnover retractor has the advantages of rotating smoothly and being safe in usage.
Description
Technical field
This utility model relates to the surgical instrument of applying in a kind of cardiac surgery operation, relates in particular to a kind of retractor.
Background technology
As shown in Figure 1, turning retractor generally includes rack-plate, the lever arm 1b that can slide along rack-plate and with the fixed arm 1a of rack-plate Joint, lever arm 1b was wherein fixed on lever arm 1b on the position after adjusting by rotating shaft and coordinating of tooth plate bar, user can be realized by pulling the rotary handle being used in conjunction with rotating shaft the locking and unlocking of lever arm 1b, this lever arm 1b and fixed arm 1a are respectively arranged with lever arm blade 2b and fixed arm blade 2a that can relative each autorotation, be specially: lever arm blade 2b and fixed arm blade 2a respectively by a bearing pin arranging along rack-plate direction respectively with lever arm 1b and fixed arm 1a pivot joint.Existing this pivot structure exist rotary moveable smooth, hinder the puckery situation such as motionless that even turns, practical effect is poor.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, and a kind of turning retractor that can flexible rotating is provided.
The technical solution adopted in the utility model is: a kind of turning retractor, comprise fixed arm, lever arm, fixed arm blade and lever arm blade, the free end of described fixed arm and the free end of lever arm arrange respectively a pair of arm and the lever arm engaging lug of being relatively fixed in rack-plate direction, on described fixed arm blade and lever arm blade, be respectively arranged with fixed arm and lever arm blade engaging lug, described fixed arm and lever arm blade engaging lug embed respectively between a pair of fixed arm engaging lug and a pair of lever arm engaging lug, and through a pair of fixed arm engaging lug and fixed arm blade engaging lug, realize the pivot joint between fixed arm blade and fixed arm by the first bearing pin, and through a pair of lever arm engaging lug and lever arm blade engaging lug, realize the pivot joint between lever arm blade and lever arm by the second bearing pin,
On described the first bearing pin, be arranged with two two end faces that are located in respectively fixed arm blade engaging lug and and the inner face of the arm engaging lug that is relatively fixed separately between bearing, on described the second bearing pin, be arranged with two other two end face that are located in respectively lever arm blade engaging lug and with the inner face of relative separately lever arm engaging lug between bearing;
Described bearing comprises bearing gasket, the center of described bearing gasket is provided with the axis hole passing for corresponding bearing pin, described bearing gasket is provided with the square hole of a plurality of through-shaft rims in the periphery of axis hole, first axis of symmetry of crossing square hole center of described square hole is along the radially setting of axis hole, described bearing also comprises the columniform bearing bead being arranged in each square hole, described bearing bead embeds in square hole with its centrage direction basically identical with the first axle of corresponding square hole, the diameter of described bearing bead is greater than the thickness of bearing gasket, the surface that makes bearing bead directly contacts with the end face of corresponding engaging lug, the material of described bearing is medical grade rustless steel.
Preferably, the difference of the diameter of described bearing bead and the thickness of bearing gasket is 0.05mm ± 0.01mm.
Preferably, each square hole of described bearing gasket is centered close on the same circumference concentric with axis hole.
Preferably, each square hole is uniformly distributed around the center of axis hole.
The beneficial effects of the utility model are: this utility model has overcome by add respectively bearing in the both sides of blade engaging lug the not smooth problem of rotation that existing turning retractor exists, in addition, owing to having adopted bearing gasket design, after bearing bead wearing and tearing diminish diameter, bearing bead can not come off out yet, can avoid like this bearing bead to fall in operative region, and bearing bead diameter can put forth effort with bearing gasket after diminishing simultaneously, cause power-assisted to strengthen, this apparatus of prompting doctor that like this can be clear and definite should keep in repair, thereby can avoid this apparatus to go wrong in operation as far as possible, reduced application risk.
Accompanying drawing explanation
Fig. 1 is the partial structurtes schematic diagram according to existing turning retractor;
Fig. 2 is according to a kind of front view of implementing structure of turning retractor described in the utility model;
The decomposing schematic representation of turning retractor shown in Fig. 3 Fig. 2;
Fig. 4 is the partial structurtes schematic diagram of fixed arm part in Fig. 2;
Fig. 5 be in Fig. 4 A-A to cutaway view;
Fig. 6 is the decomposing schematic representation of the bearing in Fig. 2 and 3.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail:
As shown in Figures 2 and 3, turning retractor of the present utility model comprises fixed arm 1a, lever arm 1b, fixed arm blade 2a and lever arm blade 2b, this fixed arm 1a is fixedly installed on rack-plate 3, lever arm 1b can slide along rack-plate 3, lever arm 1b was wherein fixed on lever arm 1b on the position after adjusting by rotating shaft 4 and coordinating of tooth plate bar 3, and user can be realized by pulling the rotary handle 5 being used in conjunction with rotating shaft 4 the locking and unlocking of lever arm 1b.
As shown in Fig. 2 to 6, the free end of the free end of fixed arm 1a and lever arm 1b arranges respectively a pair of arm engaging lug 11a and the lever arm engaging lug 11b of being relatively fixed in rack-plate 3 directions, on fixed arm blade 2a and lever arm blade 2b, be respectively arranged with fixed arm blade engaging lug 21a and lever arm blade engaging lug 21b, fixed arm and lever arm blade engaging lug 21a, 21b embeds respectively between a pair of fixed arm engaging lug 11a and a pair of lever arm engaging lug 11b, and through a pair of fixed arm engaging lug 11a and fixed arm blade engaging lug 21a, realize the pivot joint between fixed arm blade 2a and fixed arm 1a by the first bearing pin 6a, and through a pair of lever arm engaging lug 11b and lever arm blade engaging lug 21b, realize the pivot joint between lever arm blade 2b and lever arm 1b by the second bearing pin 6b, on the first bearing pin 6a, be arranged with two two end faces that are located in respectively fixed arm blade engaging lug 21a and and the inner face of the arm engaging lug 11a that is relatively fixed separately between bearing 7, in like manner, on the second bearing pin 6b, be arranged with two other two end face that are located in respectively lever arm blade engaging lug 21b and with the inner face of relative separately lever arm engaging lug 11b between bearing 7.
As illustrated in Figures 5 and 6, this bearing 7 adopts medical grade rustless steel to make, it comprises bearing gasket 71 and bearing bead 72, bearing gasket 71 center is provided with the axis hole 711 passing for corresponding bearing pin, bearing gasket 71 the periphery of axis hole 711 be provided with a plurality of through-shaft rims 71 for the square hole 712 of bearing bead 72 is installed, six square holes 712 are set in the present embodiment altogether, the first axle of crossing square hole center of this square hole 712 is along the radially setting of axis hole 711, so that the bearing bead 72 embedding in it can rotate with blade synchronization, this bearing bead 72 embeds in square hole 712 with the centrage direction basically identical with the first axle of corresponding square hole 712, the basically identical of indication is that concentricity tolerance exists herein
in scope, the diameter of described bearing bead 72 is greater than the thickness of bearing gasket 71, the surface of bearing bead 72 can directly be contacted with the end face of corresponding engaging lug, and then change sliding friction into rolling friction.
The difference of the diameter of above bearing bead and the thickness of bearing gasket is preferably 0.05mm ± 0.01mm, and the excessive one side of difference can affect attractive in appearance, can make on the other hand bearing easily hide dirt, the too small rotating effect relative mistake of difference some.
In addition, each square hole 712 center of bearing gasket 71 can be positioned on the same circumference concentric with axis hole 711, can make like this more reasonable stress of bearing 7.As each square hole 712 is uniformly distributed around axis hole 711 center, can make stressed more even.
Be only this utility model preferred embodiment in sum, be not used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of this utility model claim change and modify, all should belong to technology category of the present utility model.
Claims (4)
1. a turning retractor, comprise fixed arm, lever arm, fixed arm blade and lever arm blade, the free end of described fixed arm and the free end of lever arm arrange respectively a pair of arm and the lever arm engaging lug of being relatively fixed in rack-plate direction, on described fixed arm blade and lever arm blade, be respectively arranged with fixed arm and lever arm blade engaging lug, described fixed arm and lever arm blade engaging lug embed respectively between a pair of fixed arm engaging lug and a pair of lever arm engaging lug, and through a pair of fixed arm engaging lug and fixed arm blade engaging lug, realize the pivot joint between fixed arm blade and fixed arm by the first bearing pin, and through a pair of lever arm engaging lug and lever arm blade engaging lug, realize the pivot joint between lever arm blade and lever arm by the second bearing pin, it is characterized in that:
On described the first bearing pin, be arranged with two two end faces that are located in respectively fixed arm blade engaging lug and and the inner face of the arm engaging lug that is relatively fixed separately between bearing, on described the second bearing pin, be arranged with two other two end face that are located in respectively lever arm blade engaging lug and with the inner face of relative separately lever arm engaging lug between bearing;
Described bearing comprises bearing gasket, the center of described bearing gasket is provided with the axis hole passing for corresponding bearing pin, described bearing gasket is provided with the square hole of a plurality of through-shaft rims in the periphery of axis hole, first axis of symmetry of crossing square hole center of described square hole is along the radially setting of axis hole, described bearing also comprises the columniform bearing bead being arranged in each square hole, described bearing bead embeds in square hole with its centrage direction basically identical with the first axle of corresponding square hole, the diameter of described bearing bead is greater than the thickness of bearing gasket, the surface that makes bearing bead directly contacts with the end face of corresponding engaging lug, the material of described bearing is medical grade rustless steel.
2. turning retractor according to claim 1, is characterized in that: the difference of the diameter of described bearing bead and the thickness of bearing gasket is 0.05mm ± 0.01mm.
3. the retractor that opens according to claim 1 and 2, is characterized in that: being centered close on the same circumference concentric with axis hole of each square hole of described bearing gasket.
4. the retractor that opens according to claim 1 and 2, is characterized in that: each square hole is uniformly distributed around the center of axis hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499207.9U CN203506775U (en) | 2013-08-15 | 2013-08-15 | Turnover retractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499207.9U CN203506775U (en) | 2013-08-15 | 2013-08-15 | Turnover retractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203506775U true CN203506775U (en) | 2014-04-02 |
Family
ID=50365764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499207.9U Expired - Fee Related CN203506775U (en) | 2013-08-15 | 2013-08-15 | Turnover retractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203506775U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9066701B1 (en) | 2012-02-06 | 2015-06-30 | Nuvasive, Inc. | Systems and methods for performing neurophysiologic monitoring during spine surgery |
| US9486133B2 (en) | 2010-08-23 | 2016-11-08 | Nuvasive, Inc. | Surgical access system and related methods |
| US9655505B1 (en) | 2012-02-06 | 2017-05-23 | Nuvasive, Inc. | Systems and methods for performing neurophysiologic monitoring during spine surgery |
| US9757067B1 (en) | 2012-11-09 | 2017-09-12 | Nuvasive, Inc. | Systems and methods for performing neurophysiologic monitoring during spine surgery |
| US9795370B2 (en) | 2014-08-13 | 2017-10-24 | Nuvasive, Inc. | Minimally disruptive retractor and associated methods for spinal surgery |
| US9795367B1 (en) | 2003-10-17 | 2017-10-24 | Nuvasive, Inc. | Surgical access system and related methods |
-
2013
- 2013-08-15 CN CN201320499207.9U patent/CN203506775U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9795367B1 (en) | 2003-10-17 | 2017-10-24 | Nuvasive, Inc. | Surgical access system and related methods |
| US10172515B2 (en) | 2010-08-23 | 2019-01-08 | Nuvasive, Inc. | Surgical access system and related methods |
| US9486133B2 (en) | 2010-08-23 | 2016-11-08 | Nuvasive, Inc. | Surgical access system and related methods |
| US11457907B2 (en) | 2010-08-23 | 2022-10-04 | Nuvasive, Inc. | Surgical access system and related methods |
| US9924859B2 (en) | 2010-08-23 | 2018-03-27 | Nuvasive, Inc. | Surgical access system and related methods |
| US10980525B2 (en) | 2010-08-23 | 2021-04-20 | Nuvasive, Inc. | Surgical access system and related methods |
| US9655505B1 (en) | 2012-02-06 | 2017-05-23 | Nuvasive, Inc. | Systems and methods for performing neurophysiologic monitoring during spine surgery |
| US9066701B1 (en) | 2012-02-06 | 2015-06-30 | Nuvasive, Inc. | Systems and methods for performing neurophysiologic monitoring during spine surgery |
| US9757067B1 (en) | 2012-11-09 | 2017-09-12 | Nuvasive, Inc. | Systems and methods for performing neurophysiologic monitoring during spine surgery |
| US10660628B2 (en) | 2014-08-13 | 2020-05-26 | Nuvasive, Inc. | Minimally disruptive retractor and associated methods for spinal surgery |
| US9962147B2 (en) | 2014-08-13 | 2018-05-08 | Nuvasive, Inc. | Minimally disruptive retractor and associated methods for spinal surgery |
| US11399816B2 (en) | 2014-08-13 | 2022-08-02 | Nuvasive, Inc. | Minimally disruptive retractor and associated methods for spinal surgery |
| US9795370B2 (en) | 2014-08-13 | 2017-10-24 | Nuvasive, Inc. | Minimally disruptive retractor and associated methods for spinal surgery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20170815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |