CN114601542A - Elastic traction bow - Google Patents
Elastic traction bow Download PDFInfo
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- CN114601542A CN114601542A CN202210256267.1A CN202210256267A CN114601542A CN 114601542 A CN114601542 A CN 114601542A CN 202210256267 A CN202210256267 A CN 202210256267A CN 114601542 A CN114601542 A CN 114601542A
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- traction
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- elastic
- traction bow
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- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 230000007306 turnover Effects 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 206010017076 Fracture Diseases 0.000 description 9
- 210000000988 bone and bone Anatomy 0.000 description 8
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000004197 pelvis Anatomy 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 206010034246 Pelvic fractures Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/66—Alignment, compression or distraction mechanisms
Abstract
The invention relates to an elastic traction bow, comprising: an elastic body having one end connected to the traction rope; and one end of the traction bow is connected to the other end of the elastic body. The elastic body is additionally arranged between the traction rope and the traction bow, so that the elastic traction of the fracture reduction operation is realized, an elastic movement space is provided for the operation, and the doctor can carry out various reduction operations in the traction process. The traction bow is a tension traction bow, and the tension arm can be conveniently adjusted by arranging the adjusting mechanism, so that the tension of the traction bow is adjusted. The tension of the traction bow can be conveniently adjusted by adopting the ratchet wrench which can rotate in two directions, and particularly, the tension can be adjusted at will in the traction process. Through setting up anchor clamps base and anchor clamps seat of honour, can conveniently press from both sides tight spicule, under the tensile condition of increase, can guarantee that the spicule does not loosen and takes off.
Description
Technical Field
The invention belongs to the field of medical instruments, relates to a traction technology for fracture reduction, and particularly relates to an elastic traction bow.
Background
When fracture occurs, the fracture end is usually dislocated, and the dislocated skeleton needs to be gradually dragged to the normal physiological position for resetting in a traction mode during treatment. Generally, a bone penetrating nail is transversely penetrated through the far end of the fracture and then connected with the bone penetrating nail by a traction bow, and the dislocation part of the fractured bone is gradually closed or involuted by applying force through a bow arm, thereby realizing the reduction of the fracture.
The existing traction bow is basically rigid traction. The traction rope is directly connected to the traction bow, and the traction mechanism pulls the traction bow through the traction rope, so that the far end of the fracture is pulled. However, in some fracture reduction surgeries, rigid distraction does not facilitate the reduction procedure for the surgeon. For example, in a pelvic fracture reduction operation, after the fractured lower limb of a patient is pulled to a certain position, the fractured end of the pelvis must be gradually moved toward the healthy end of the pelvis until the fractured end reaches the closed position. At this time, the existing traction bow cannot well meet the requirements of operation. In addition, the existing traction bow has single function and poor flexibility, can not quickly adjust the tension of the traction bow, and is very inconvenient to operate.
Therefore, there is a need in the art to design a new type of elastic traction bow that facilitates the performance of various reduction surgical procedures during traction.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides an elastic traction bow, comprising:
an elastic body having one end connected to the traction rope;
and one end of the traction bow is connected to the other end of the elastic body.
Further, the elastic body comprises an outer cylinder and an elastic piece, wherein one end of the outer cylinder is provided with a movable part which is connected to the traction rope, the other end of the outer cylinder is provided with a connecting part, and the traction bow is connected to the connecting part;
the elastic piece is arranged in the outer cylinder, one end of the elastic piece is fixedly connected to the connecting part, and the other end of the elastic piece is fixedly connected to the movable part.
Further, still include interior barrel, set up in the outer barrel, interior barrel one end is connected to the movable part, the elastic component sets up in the inner barrel.
Further, still include the connecting rod, detachably connects between elastomer and the traction bow, the one end of connecting rod is provided with ring groove.
Further, the connection portion includes:
the interface inner cylinder is uniformly provided with a plurality of through holes along the outer circumference;
the interface outer cylinder is sleeved outside the interface inner cylinder in a sliding manner;
the steel balls are arranged between the interface inner cylinder and the interface outer cylinder and partially enter the through holes;
when the interface outer cylinder slides relative to the interface inner cylinder, the steel balls extend into the interface inner cylinder or withdraw from the interface inner cylinder.
Further, the connector outer barrel further comprises a locking mechanism, wherein the locking mechanism is arranged outside the connector outer barrel and used for locking the connector outer barrel.
Further, the movable portion includes:
the clamping groove is used for connecting a traction rope;
the turnover cover can be assembled on the movable part in a lifting mode, the clamping groove is exposed after the turnover cover is opened, and a wire groove is formed between the turnover cover and the movable part body.
Further, the traction bow is a tension traction bow, comprising:
the pair of bow arms are symmetrically arranged, and the tail end of each bow arm is provided with a connecting part connected with the spicule;
the connecting arms are rotatably connected with the front ends of the bow arms;
a pair of tension arms symmetrically arranged at the position close to the front end of the bow arm, wherein one end of each tension arm is rotatably connected to the bow arm;
and two ends of the adjusting mechanism are respectively movably connected with the other ends of the pair of tension arms and used for adjusting the pair of tension arms to move in opposite directions or in reverse directions.
Further, the adjustment mechanism includes:
the ratchet shaft is provided with ratchet teeth outside, two ends of the ratchet shaft are respectively and movably connected with the other ends of the pair of tension arms, and the ratchet shaft is connected to the connecting arm through a shaft sleeve;
the ratchet wrench is movably connected to the ratchet shaft through the shaft sleeve, and a pawl is arranged on the ratchet wrench and can be meshed with the ratchet teeth of the ratchet shaft.
Further, the pawl comprises a first pawl tooth and a second pawl tooth, and the first pawl tooth or the second pawl tooth is meshed with the ratchet wheel teeth by rotating the pawl, so that the ratchet wheel wrench can rotate anticlockwise or clockwise in one direction by rotating the ratchet wheel wrench.
The tension arm is characterized by further comprising a pair of connecting pieces, wherein one end of each connecting piece is movably connected with the other end of each tension arm in a rotating shaft mode, the other end of each connecting piece is provided with an internal thread hole or an external thread rod, and the thread directions of the two connecting pieces are opposite;
the tip of ratchet axle is equipped with one section external screw thread pole or internal thread hole, and the screw thread direction at both ends is opposite, external screw thread pole or internal thread hole respectively with internal thread hole or external screw thread pole threaded connection.
Further, the ratchet teeth are arranged in the middle of the ratchet shaft;
the ratchet wrench is movably connected to the ratchet shaft through two wrench shaft sleeves, the ratchet teeth are located between the two wrench shaft sleeves, and the pawls are arranged in the middle of the ratchet wrench and correspond to the ratchet teeth.
Further, the ratchet wrench further comprises:
the pawl rotating shaft is rotatably arranged on the pawl rotating shaft;
the ejector block is arranged in a spring cavity of the ratchet wrench, the outer end of the ejector block abuts against the back of the pawl and is used for limiting the pawl, and a spring is arranged at the other end of the ejector block.
Further, the connection portion includes:
the clamp base is arranged on the bow arm;
the clamp upper seat is correspondingly arranged on the clamp base;
the knob is arranged at one end of the screw rod, and the screw rod penetrates through the clamp upper seat and is connected to the clamp base.
Further, a needle groove is formed in the clamp base and/or the clamp upper seat.
Further, the needle groove is provided at a front side of the screw.
Further, the clamp base is movably disposed on the bow arm.
The invention designs the elastic traction bow, realizes the elastic traction of the fracture reduction operation by adding the elastic body, provides an elastic movement space for the operation and greatly facilitates the doctor to carry out various reduction operations in the traction process.
In addition, the elastic body is detachably connected with the traction bow, and if the elastic body is not needed, the traction rope can be directly connected to the traction bow, so that more instrument using modes are provided for doctors. Have fast interface between elastomer and the traction bow, it is convenient to install and dismantle, and has locking structure, safe and reliable after the connection.
The traction bow is a tension traction bow, and the tension arm can be conveniently adjusted by arranging the adjusting mechanism, so that the tension of the traction bow is adjusted. The tension of the traction bow can be conveniently adjusted by adopting the ratchet wrench which can rotate in two directions, and particularly, the tension can be adjusted at will in the traction process. Through setting up anchor clamps base and anchor clamps seat of honour, can conveniently press from both sides tight spicule, under the tensile condition of increase, can guarantee that the spicule does not loosen and takes off.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the technical solutions will be further explained with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of the attachment of an elastic traction bow according to an embodiment of the present invention.
Fig. 2 is a schematic view showing a state in which an elastic body and a tie bar according to an embodiment of the present invention are coupled.
FIG. 3 is a schematic view of a connecting rod of an embodiment of the present invention.
FIG. 4 is a schematic cross-sectional view of an elastomer and tie rod in accordance with an embodiment of the invention.
Fig. 5 is a schematic cross-sectional view of an elastomer according to an embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of an elastomer according to an embodiment of the present invention.
Fig. 7 is a schematic view showing a state in which the lid of the movable part is opened according to the embodiment of the present invention.
Fig. 8 is a schematic diagram of a tension traction bow according to an embodiment of the present invention.
Fig. 9 is a schematic diagram of a tension traction bow according to an embodiment of the present invention.
FIG. 10 is a cross-sectional view of a ratchet mechanism according to an embodiment of the present invention.
Reference numerals:
the connecting rod 1, the elastic body 2, the tension traction bow 3, the traction rope 4, the ratchet wrench 5, the connector 11, the annular clamping groove 12, the connecting hole 13, the outer cylinder 201, the inner cylinder 202, the movable part 203, the spring 204, the connecting ring 205, the spring hanging point 206, the locking sleeve 207, the interface spring 208, the interface inner cylinder 209, the inclined part 210, the steel ball 211, the spring hanging point 212, the interface outer cylinder 213, the clamping groove 214, the flip cover 215, the wire groove 216, the locking hole 217, the bow arm 301, the clamp base 302, the clamp upper seat 303, the knob 304, the screw 305, the tension arm 306, the connecting arm 307, the shaft sleeve 308, the sealing cap 309, the spring 310, the top block 311, the pawl 312, the pawl rotating shaft 313, the ratchet tooth 314, the first pawl tooth 315A, the second pawl tooth 315B, the connecting piece 316, the ratchet shaft 317, the spring cavity 318, the first position 319 and the second position 320.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, unless otherwise specified, "plurality", "plural groups" means two or more, and "several", "several groups" means one or more.
The elastic traction bow of the invention comprises: an elastic body having one end connected to the traction rope; and one end of the traction bow is connected to the other end of the elastic body. The elastic body is additionally arranged between the traction rope and the traction bow, so that the elastic traction of the fracture reduction operation is realized, an elastic movement space is provided for the operation, and the doctor can carry out various reduction operations in the traction process.
Preferably, the elastic body comprises an outer cylinder and an elastic member, wherein one end of the outer cylinder is provided with a movable part connected to the traction rope, the other end of the outer cylinder is provided with a connecting part to which the traction bow is connected, the elastic member is arranged in the outer cylinder, one end of the elastic member is fixedly connected to the connecting part, and the other end of the elastic member is fixedly connected to the movable part. The elastic part is connected between the movable part and the connecting part, the movable part needs to overcome the elasticity of the elastic part relative to the movement of the outer cylinder body, and the elasticity of the elastic part can be selected according to the operation requirement.
Preferably, the device further comprises an inner cylinder body arranged in the outer cylinder body, one end of the inner cylinder body is connected to the movable part, and the elastic part is arranged in the inner cylinder body. When the movable part is far away from the outer cylinder body under the action of traction force, the inner cylinder body can move along with the movable part, and part of the inner cylinder body extends out of the outer cylinder body, so that the elastic part is not exposed outside.
Preferably, the connection portion is a quick interface including: the interface inner cylinder is uniformly provided with a plurality of through holes along the outer circumference; the interface outer cylinder is sleeved outside the interface inner cylinder in a sliding manner; the steel balls are arranged between the interface inner cylinder and the interface outer cylinder and partially enter the through holes; when the interface outer cylinder slides relative to the interface inner cylinder, the steel balls extend into the interface inner cylinder or withdraw from the interface inner cylinder.
Specifically, the inner wall of the interface outer cylinder is provided with an inclined part and a parallel part, and the inclination and the parallel are relative to the outer wall of the interface inner cylinder. The rear part of the interface outer cylinder is provided with an interface spring which provides pre-thrust for the interface outer cylinder, so that the interface outer cylinder is in a locking position, and the end part of the interface outer cylinder extends out of the end part of the interface inner cylinder. At the moment, the steel ball is positioned between the through hole of the interface inner cylinder and the inclined part of the interface outer cylinder, and the steel ball is partially extruded into the interface inner cylinder by the inclined part. When the interface outer cylinder slides relative to the interface inner cylinder, the interface outer cylinder resists the elasticity of the interface spring and moves to an unlocking position, the end part of the interface outer cylinder is flush with the end part of the interface inner cylinder, the inclined part does not extrude the steel ball, the steel ball is positioned between the parallel part and the through hole, and the part of the steel ball extending into the interface inner cylinder can retract. When the interface outer cylinder is loosened, the interface outer cylinder returns to the locking position under the elastic force of the interface spring.
And when the connecting rod is inserted, the end of the annular clamping groove is inserted into the interface inner cylinder, the position of the annular clamping groove corresponds to that of the through hole of the interface inner cylinder, and a steel ball extending into the interface inner cylinder is clamped in the annular clamping groove. Specifically, when the connecting rod needs to be installed, the interface outer barrel is pushed to the unlocking position, the steel balls retract from the through hole of the interface inner barrel at the moment, the insertion end of the connecting rod can be inserted into the interface inner barrel, the interface outer barrel is loosened, the interface outer barrel returns to the locking position under the elastic action of the interface spring, the steel balls partially extend into the interface inner barrel under the extrusion of the inclined part at the moment, and the steel balls are clamped in the annular clamping groove of the connecting rod to finish assembly.
More preferably, the connector outer barrel further comprises a locking structure, the connector outer barrel can be locked at a locking position, and the connector outer barrel is prevented from sliding back to cause the connecting rod to be separated due to misoperation. For example, the locking structure may be a locking sleeve screwed onto the outer cylinder, and the locking sleeve may be tightened after the interface outer cylinder returns to the locking position, at which time the interface outer cylinder cannot slide.
Preferably, the movable part can include flip, can lift the assembly on the movable part, exposes the draw-in groove after flip opens, and the draw-in groove is located the movable part originally internally for connect the haulage rope, for example at the one end installation fixture block of haulage rope, with the fixture block embedding draw-in groove, just accomplish being connected of haulage rope and movable part, convenient operation. A wire groove is formed between the turnover cover and the movable part body and communicated with the clamping groove, so that the traction rope is conveniently embedded.
The tension traction bow of the present invention comprises: the pair of bow arms are symmetrically arranged, and the tail end of each bow arm is provided with a connecting part connected with the spicule; the connecting arms are rotatably connected with the front ends of the bow arms; a pair of tension arms symmetrically arranged at the position close to the front end of the bow arm, wherein one end of each tension arm is rotatably connected to the bow arm; and two ends of the adjusting mechanism are respectively movably connected with the other ends of the pair of tension arms and used for adjusting the pair of tension arms to move in opposite directions or in reverse directions.
The tension traction bow can adjust the movement direction of the pair of tension arms through the adjusting mechanism, and can adjust the stretching and the recovery of the bow arms, thereby adjusting the tension.
Preferably, the adjustment mechanism is a ratchet mechanism comprising: the ratchet shaft is provided with ratchet teeth outside, two ends of the ratchet shaft are respectively and movably connected with the other ends of the pair of tension arms, and the ratchet shaft is connected to the connecting arm through a shaft sleeve; the ratchet wrench is movably connected to the ratchet shaft through the shaft sleeve, and a pawl is arranged on the ratchet wrench and can be meshed with the ratchet teeth of the ratchet shaft. Preferably, the pawl comprises a first pawl tooth and a second pawl tooth, and rotation of the ratchet wrench enables one-way rotation of the ratchet shaft in either a counter-clockwise or clockwise direction by rotating the pawl to engage the first pawl tooth or the second pawl tooth with the ratchet teeth.
Preferably, the end of the ratchet shaft is provided with a section of externally threaded rod or internally threaded hole, and the thread directions of the two ends are opposite. The end part of the tension arm is provided with a movably connected connecting piece, and the connecting piece is provided with an internal thread hole or an external thread rod which is in threaded connection with the external thread rod or the internal thread hole at the end part of the ratchet shaft. Therefore, when the ratchet shaft rotates along one direction, the pair of tension arms can be driven to move oppositely, and when the ratchet shaft rotates along the opposite direction, the pair of tension arms can be driven to move towards the opposite direction.
Different pawl teeth of the pawl are engaged with the ratchet teeth, and the ratchet shaft can rotate according to a preset direction by rotating the ratchet wrench, so that the tension arm is driven to move, the arch arm is adjusted to be opened and retracted, and the tension force is adjusted.
Preferably, the top block is used for limiting the position of the pawl, the top block can be propped at a first position or a second position on the back of the pawl, when the top block is propped at the first position, the first pawl tooth is meshed with the ratchet wheel tooth, and when the top block is propped at the second position, the second pawl tooth is meshed with the ratchet wheel tooth. Preferably, the top block is arranged elastically, so that the top block can be easily switched between the first position and the second position by shifting the pawl, thereby realizing the switching of the rotation direction of the ratchet shaft and further completing the increase or decrease of the tension.
Preferably, the connection part includes: the clamp base is arranged on the bow arm; the clamp upper seat is correspondingly arranged on the clamp base; the knob is arranged at one end of the screw rod, and the screw rod penetrates through the clamp upper seat and is connected to the clamp base. Can drive the screw rod through rotating the knob and rotate, fasten the anchor clamps seat of honour to the anchor clamps base, perhaps reverse rotation screw rod for the anchor clamps seat of honour breaks away from the anchor clamps base, is convenient for press from both sides tightly or dismantle the spicule.
Preferably, the clamp base and/or the clamp upper seat are/is provided with a needle groove, so that the bone needle is convenient to fix, and the bone needle is not easy to shift in the traction process.
Preferably, the needle groove is provided at a front side of the screw rod, i.e., a side close to the traction bow, so that even if the bone needle is separated from the needle groove during traction, it is caught by the screw rod and is not separated from the traction bow.
Preferably, the clamp base is movably arranged on the bow arm. The clamp base can rotate a certain angle or move a certain distance back and forth so that when the spicules deviate or are inclined, the spicules can be placed in the needle grooves by adjusting the clamp base. The upper clamp seat and the screw are assembled on the clamp base and can be synchronously adjusted along with the clamp base, so that the clamp base and the upper clamp seat can be aligned and clamped.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the elastic traction bow 3 of the present embodiment has a connection rod 1 connected to one end thereof for connecting to an elastic body 2, and a traction rope 4 connected to the other end of the elastic body 2, wherein the traction rope 4 can be connected to a traction system. The connecting rod 1 is detachably connected between the tension traction bow 3 and the elastic body 2. The tension traction bow 3 comprises a ratchet wrench 5 for adjusting the tension. The ratchet wrench 5 can be adjusted in both directions, thereby facilitating adjustment of the tension.
As shown in fig. 2, the elastic body 2 includes an outer cylinder 201 having a cylindrical shape. One end of the outer cylinder 201 is provided with a movable part 203, and the movable part 302 is provided with a flip cover 215. A connection ring 205 is provided at the end of the movable portion 203 and can be used for connecting the traction rope 4. The other end of the elastic body 2 is provided with a connection part into which the connection rod 1 is inserted. The outer sleeve of the connecting portion is provided with a locking sleeve 207.
As shown in fig. 3, one end of the connecting rod 1 is provided with a connector 11 for connecting to the tension traction bow 3, and the other end is provided with a ring-shaped slot 12 for connecting to the connecting interface of the elastic body 2. In this embodiment, the connector is a U-shaped structure, and the upper and lower sidewalls thereof are respectively provided with a connection hole 13.
As shown in fig. 4-6, the elastic body 2 includes a spring 204 disposed inside the outer cylinder 201, and one end is fixedly connected to the connecting portion through a spring hanging point 206, and the other end is fixedly connected to the movable portion 203 through a spring hanging point 212. The elastic body 2 further includes an inner cylinder 202 disposed in the outer cylinder 201, one end of the inner cylinder 202 is connected to the movable portion 203, and a spring 204 is partially disposed in the inner cylinder 202.
The connection part of the elastic body 2 comprises an interface inner cylinder 209 and an interface outer cylinder 213, and the interface outer cylinder 213 is sleeved outside the interface inner cylinder 209. The interface inner cylinder 209 is uniformly provided with a plurality of through holes along the outer circumference. The steel ball 211 is arranged between the interface inner cylinder 209 and the interface outer cylinder 213 and partially enters the through hole. When the interface outer cylinder 213 slides relative to the interface inner cylinder 209, the steel balls 211 can extend into the interface inner cylinder 209 or withdraw from the interface inner cylinder 209.
As shown in the figure, the inner wall of the interface outer cylinder 213 is provided with an inclined part 210 and a parallel part, which are naturally connected in a transition manner. The interface outer cylinder 213 is provided with an interface spring 208 at the rear to provide a pre-thrust for the interface outer cylinder 213. When the interface outer cylinder 213 is in a locking position, the steel ball 211 is positioned between the through hole of the interface inner cylinder 209 and the inclined part 210 of the interface outer cylinder 213, and the steel ball 211 is partially extruded into the interface inner cylinder 209 by the inclined part 210. When the interface outer cylinder 213 slides relative to the interface inner cylinder 209, the interface outer cylinder 213 moves to the unlocking position against the elastic force of the interface spring 208, at this time, the inclined part 210 of the interface outer cylinder 213 no longer presses the steel ball 211, the steel ball 211 is located between the parallel part and the through hole, and the part of the steel ball 211 extending into the interface inner cylinder 209 can retract.
One end of the connecting rod 1 is provided with an annular clamping groove 12, when the connecting rod 1 is inserted, the annular clamping groove 12 is inserted into the interface inner cylinder 209, the position of the annular clamping groove 12 corresponds to the position of the through hole of the interface inner cylinder 209, and a steel ball 211 extending into the interface inner cylinder 209 is clamped in the annular clamping groove 12.
The locking sleeve 207 is sleeved outside the interface outer barrel 213 and is in threaded connection with the outer barrel 201, when the connection of the connecting rod 1 is completed, the interface outer barrel 213 returns to the locking position, the locking sleeve 207 is rotated to lock the interface outer barrel 213, and the interface outer barrel 213 is prevented from sliding to cause the separation of the connecting rod 1 due to misoperation.
As shown in fig. 7, the movable portion 203 includes a flip cover 215, one end of the flip cover 215 is pivotally connected to the movable portion 203, and the other end is openably snapped to the movable portion, and the snapping end is provided with a locking hole 217 for locking the flip cover 215. In a state where the lid 215 is covered, the movable portion 203 and the lid 215 have a cylindrical shape. After the flip cover 215 is opened, the card slot 204 and the wire slot 216 disposed inside the movable portion 203 can be exposed, and one end of the wire slot 216 is communicated with the card slot 204, and the other end is communicated with the wire hole on the surface of the movable portion 203. The slot 204 is used to facilitate connection of a pull cord.
As shown in fig. 8 and 9, the tension traction bow 3 includes a pair of bow arms 301 symmetrically arranged, and a clamp base 302 is provided at a distal end of each bow arm 301. The front ends of the bow arms 301 are arc-shaped, the connecting arm 307 is rotatably connected to the front ends of the two bow arms 301, and the connecting arm 307 is connected to the connecting head 11 of the connecting rod 1. Near the front end of the bow arm 301, a pair of tension arms 306 are symmetrically arranged, one end of each tension arm 306 is rotatably connected to the bow arm 301, the other end of each tension arm 306 is rotatably connected with a connecting piece 316, one end of each connecting piece 316 is rotatably connected to the corresponding tension arm 306, the other end of each connecting piece 316 is provided with an external threaded rod, and the external threaded rods of the two connecting pieces 316 are opposite in thread direction.
The ratchet shaft 317 is connected to the connecting arm 307 through the boss 308. Both ends of the ratchet shaft 317 are respectively provided with an internal thread hole, and the thread directions of both ends are opposite. The internally threaded bore is threadedly coupled to the externally threaded rod of the connector 316. The ratchet shaft 317 is provided at the outer portion thereof with ratchet teeth 314, and the ratchet teeth 314 are located at the middle portion of the ratchet shaft 317 and surround the ratchet shaft 317 once.
The ratchet wrench 5 is connected to the ratchet shaft 317 by two wrench socket 321 so that the ratchet wrench 5 can rotate around the ratchet shaft 317. The ratchet wrench 5 is provided with a pawl 312 in the middle corresponding to the position of the ratchet teeth 314.
A clamp base 302 is provided near the distal end of the arm 301, and the clamp base 302 is movably provided on the arm 301. The clamp base 302 is provided with a needle groove, and the surface of the needle groove can be provided with lines to increase friction force.
The jig upper base 303 is correspondingly disposed on the jig base 302, and the knob 304 is coupled to one end of the screw 305, and the screw 305 is coupled to the jig base 302 through the jig upper base 303. In use, the bone pins may be placed in the pin slots of the clamp base 302 and the clamp upper base 303 may be securely attached to the clamp base 302 by turning the knob 304, thereby clamping the bone pins.
As shown in fig. 10, the pawl 312 includes a first pawl tooth 315A and a second pawl tooth 315B, and the pawl 312 is disposed on the pawl rotation shaft 313 such that the pawl 312 can be rotated such that the first pawl tooth 315A or the second pawl tooth 315B engages with the ratchet teeth 314, and the ratchet wrench 5 is rotated to rotate the ratchet shaft 317 via the pawl 312. The first and second pawl teeth 315A, 315B are used to effect bi-directional rotation of the ratchet shaft 317 by the ratchet wrench 5.
The top piece 311 is used to limit the position of the pawl 312, the top piece 312 is pressed against the back of the pawl 312 at a first position 319 or a second position 320 (two concave positions in the figure), when the top piece 311 is pressed against the first position 319, the first pawl tooth 315A is engaged with the ratchet wheel tooth 314, and when the top piece 311 is pressed against the second position 320, the second pawl tooth 315B is engaged with the ratchet wheel tooth 314.
The middle part of the ratchet wrench 5 is provided with a spring cavity 318, the spring 310 is arranged in the spring cavity 318, the top block 311 is arranged at the front end of the spring 310, the sealing cap 309 seals the spring cavity 318, and the spring 310 provides a pre-thrust for the top block 311. The top block 311 is elastically arranged, so that the top block can be easily switched between the first position 319 and the second position 320 by dialing the pawls 312, so that the rotation direction of the ratchet shaft 317 can be switched, and the increase or decrease of the tension can be further completed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An elastic traction bow, comprising:
an elastic body having one end connected to the traction rope;
and one end of the traction bow is connected to the other end of the elastic body.
2. The elastic traction bow of claim 1, wherein the elastic body comprises an outer cylinder and an elastic member, wherein one end of the outer cylinder is provided with a movable portion connected to the traction rope, and the other end of the outer cylinder is provided with a connecting portion to which the traction bow is connected;
the elastic piece is arranged in the outer cylinder, one end of the elastic piece is fixedly connected to the connecting portion, and the other end of the elastic piece is fixedly connected to the movable portion.
3. The resilient traction bow of claim 2, further comprising an inner cylinder disposed within the outer cylinder, the inner cylinder being connected at one end to the movable portion, the resilient member being disposed within the inner cylinder.
4. The elastic traction bow of claim 2, further comprising a connecting rod removably connected between the elastomer and the traction bow, wherein one end of the connecting rod is provided with an annular notch.
5. The resilient traction bow according to claim 2, wherein the coupling portion comprises:
the interface inner cylinder is uniformly provided with a plurality of through holes along the outer circumference;
the interface outer cylinder is slidably sleeved outside the interface inner cylinder;
the steel balls are arranged between the interface inner cylinder and the interface outer cylinder and partially enter the through holes;
when the interface outer cylinder slides relative to the interface inner cylinder, the steel balls extend into the interface inner cylinder or withdraw from the interface inner cylinder.
6. The resilient traction bow of claim 5, further comprising a locking mechanism disposed on an exterior of the interface outer cylinder for locking the interface outer cylinder.
7. The elastic traction bow of claim 2, wherein the movable portion comprises:
the clamping groove is used for connecting a traction rope;
the turnover cover can be assembled on the movable part in a lifting mode, the clamping groove is exposed after the turnover cover is opened, and a wire groove is formed between the turnover cover and the movable part body.
8. The resilient traction bow of claim 1, wherein the traction bow is a tension traction bow comprising:
the pair of bow arms are symmetrically arranged, and the tail end of each bow arm is provided with a connecting part connected with the spicule;
the connecting arms are rotatably connected with the front ends of the bow arms;
a pair of tension arms symmetrically arranged at the position close to the front end of the bow arm, wherein one end of each tension arm is rotatably connected to the bow arm;
and two ends of the adjusting mechanism are respectively movably connected with the other ends of the pair of tension arms and used for adjusting the pair of tension arms to move in opposite directions or in reverse directions.
9. The elastic traction bow of claim 8, wherein the adjustment mechanism comprises:
the ratchet shaft is provided with ratchet teeth outside, two ends of the ratchet shaft are respectively and movably connected with the other ends of the pair of tension arms, and the ratchet shaft is connected to the connecting arm through a shaft sleeve;
the ratchet wrench is movably connected to the ratchet shaft through the shaft sleeve, and a pawl is arranged on the ratchet wrench and can be meshed with the ratchet teeth of the ratchet shaft.
10. The resilient traction bow of claim 9, wherein the pawl comprises a first pawl tooth and a second pawl tooth, and wherein rotation of the ratchet wrench enables one of counterclockwise and clockwise rotation of the ratchet shaft by rotating the pawl to engage the first pawl tooth or the second pawl tooth with the ratchet teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256267.1A CN114601542A (en) | 2022-03-16 | 2022-03-16 | Elastic traction bow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256267.1A CN114601542A (en) | 2022-03-16 | 2022-03-16 | Elastic traction bow |
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| Publication Number | Publication Date |
|---|---|
| CN114601542A true CN114601542A (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210256267.1A Pending CN114601542A (en) | 2022-03-16 | 2022-03-16 | Elastic traction bow |
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| CN (1) | CN114601542A (en) |
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