CN111297418A - Lumbar vertebra three-way minimally invasive retractor - Google Patents

Abstract

The invention discloses a three-way minimally invasive lumbar vertebra retractor, in particular to the field of medical equipment. There is a limit hole running through the middle of the horizontal plate, and a push-pull assembly is slidably arranged in the limit hole. The push-pull assembly is driven to perform linear reciprocating motion, and the push-pull assembly drives the middle hook to move in the front and rear directions of the knife edge; the bottom end of the push-pull assembly is connected to the reversing drive mechanism through the limit hole, and the reversing drive mechanism is connected to the two connecting rods respectively. The push-pull assembly drives the reversing drive mechanism while performing linear motion. The whole device of the invention has the advantages of simple structure, low cost, energy saving and convenient operation regardless of manual or electric operation, and can realize three-way retraction of lumbar vertebrae in only one step.

Description

A lumbar three-way minimally invasive retractor

technical field

Embodiments of the present invention relate to the field of medical equipment, in particular to a lumbar three-way minimally invasive retractor.

Background technique

Retractors, also known as retractors, are used to retract tissue, reveal the surgical field, and facilitate exploration and operation. They can be divided into two types: hand-held retractors and automatic retractors. There are various specifications of different shapes and sizes, and the appropriate retractor can be selected according to the surgical needs. The existing lumbar retractor is generally used to open the opposite retractor body, which may expand the scope of both sides of the incision, resulting in increased blood loss, which is not conducive to the operation.

In view of the above problems, there is a lumbar retractor that can be stretched in three directions on the market. Whether this retractor is manually operated or automatically operated by an electronic control device, it generally requires two-step operation. That is to say, one step is to stretch oppositely to both sides, and the other step is to stretch the hook in the third direction to the outside. Therefore, if it is manually operated, the operation is complicated and difficult for one person to operate. If it is an electric control, it requires two There are problems such as high cost and energy waste caused by separate control and energization of each electronic control device for driving and retracting.

SUMMARY OF THE INVENTION

To this end, an embodiment of the present invention provides a three-way minimally invasive lumbar vertebra retractor, which uses a stretching mechanism to drive the push-pull assembly to perform linear reciprocating motion, the push-pull assembly drives the middle hook to pull the wound in one direction, and drives the two side edges at the same time. The rack moves, it meshes with the inner gear, so as to realize linear and circular motion, the gear drives the connecting rod to rotate through the rotating shaft, and the two connecting rods drive the two side hooks to swing, so as to realize the traction in the other two directions of the wound, that is, through a pull The stretching mechanism realizes the three-way retraction of the lumbar vertebra, the whole device has a simple structure, low cost, energy saving, and is convenient for manual or electric operation. The problem caused by three-way retraction requires two-step control operations to achieve.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: a three-way minimally invasive lumbar vertebra retractor, comprising a fixed seat, a lifting mechanism and a support transverse plate, and the bottom of the supporting transverse plate is fixedly connected to the fixing seat through the lifting mechanism There is a limit hole running through the middle of the support horizontal plate, and a push-pull assembly is slidably arranged in the limit through hole. The stretching mechanism drives the push-pull assembly to perform linear reciprocating motion, and the push-pull assembly drives the middle hook to move in the front and rear directions of the knife edge;

The bottom end of the push-pull assembly is connected to the reversing drive mechanism through the limit hole, and the reversing drive mechanism is respectively connected with two side hooks through two connecting rods. The reversing drive mechanism converts the linear motion into rotational motion, and drives the two side hooks to swing in the left and right directions of the knife edge through the connecting rod.

Further, the lifting mechanism is specifically an electric push rod or a manual lifting screw rod, the bottom end of the lifting mechanism is fixedly connected with the fixing seat, and the rod end is fixedly connected with the supporting horizontal plate.

Further, the push-pull assembly includes an upper push-pull plate and a lower push-pull rod, the lower push-pull rod is disposed at the bottom of the upper push-pull plate and is integrally formed with the upper push-pull plate, and the push-pull assembly composed of the upper push-pull plate and the lower push-pull rod is provided It is T-shaped, the lower push-pull rod is slidably arranged inside the limit hole and the bottom end is fixedly connected with the reversing drive mechanism.

Further, the reversing drive mechanism includes two rotating shafts, two gears and two side racks, the two rotating shafts are arranged symmetrically up and down and the middle part is connected by a ball bearing, and the two gears are respectively fixed on the two rotating shafts, The two connecting rods are arranged between the two gears and are respectively fixedly connected with the two rotating shafts. The rack is fixedly connected with the lower push-pull rod through an L-shaped bracket.

Further, the top of a rotating shaft located at the top is fixedly connected to the support cross plate through a bearing, and the bottom end of the rotating shaft located at the bottom is connected to the support frame through a bearing, the cross section of the support frame is set to be L-shaped, and the other end of the support frame is connected to the support cross plate. Fixed connection, and the connection between the support frame and the support horizontal plate is arranged on one side of the limit perforation.

Further, the stretching mechanism is specifically an electric push rod or a pull rod, one end of the stretching mechanism is fixedly connected with the support horizontal plate, and the other end is fixedly connected with the push-pull assembly.

Further, the side pull hook and the connecting rod are movably connected by pins, the connecting rod is arranged in an arc shape, and the two connecting rods and the two side pull hooks are respectively arranged symmetrically with respect to the connecting plate.

Further, sliding feet are fixedly arranged at the bottom of the connecting plate, and the sliding feet are slidably arranged in the limiting through holes.

The embodiments of the present invention have the following advantages:

1. The present invention uses the stretching mechanism to drive the push-pull assembly to do linear reciprocating motion, the push-pull assembly drives the middle hook to pull the wound in one direction, and drives the two side racks to move at the same time, which meshes with the inner gear, thereby realizing a straight line rotation. Movement, the gear drives the connecting rod to rotate through the rotating shaft, and the two connecting rods drive the two side hooks to swing, so as to realize the traction in the other two directions of the wound, that is, the three-way retraction of the lumbar vertebra is realized through a stretching mechanism. The whole device has a simple structure and low cost. Low energy consumption, convenient operation, and three-way retraction of lumbar spine can be achieved in just one step;

2. The present invention can also be manually controlled. By manually pulling the pull rod, the middle pull hook and the side pull hook can be retracted at the same time. The whole device does not need to be powered on, and it is more convenient to operate in one step during pulling.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can also be derived from the provided drawings without any creative effort.

The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention, so there is no technical The substantive meaning above, any modification of the structure, the change of the proportional relationship or the adjustment of the size should still fall within the technical content disclosed in the present invention without affecting the effect and the purpose that the present invention can produce. within the range that can be covered.

Fig. 1 is the overall plan view provided by the present invention;

Fig. 2 is the overall side view provided by the present invention;

3 is a schematic structural diagram of a reversing drive mechanism provided by the present invention;

4 is a partial cross-sectional view of the reversing drive mechanism provided by the present invention;

Fig. 5 is the top view of the support transverse plate provided by the present invention;

6 is a schematic structural diagram of a push-pull assembly provided by the present invention;

7 is a schematic structural diagram of a side pull hook provided by the present invention;

In the picture: 1 fixed seat, 2 lift mechanism, 3 reversing drive mechanism, 31 shaft, 32 gear, 33 side rack, 34 ball bearing, 35L bracket, 36 support frame, 4 limit perforation, 5 push-pull assembly, 51 upper push-pull plate, 52 lower push-pull rod, 6 stretching mechanism, 7 middle pull hook, 8 support horizontal plate, 9 side pull hook, 10 connecting rod, 11 connecting plate, 12 pin, 13 sliding foot.

Detailed ways

The embodiments of the present invention are described below by specific specific embodiments. Those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

Referring to Figures 1-6 of the description, a three-way minimally invasive lumbar vertebra retractor of this embodiment includes a fixed seat 1 , a lifting mechanism 2 and a support transverse plate 8 , and the bottom of the supporting transverse plate 8 is fixed with the lifting mechanism 2 at the bottom. The seat 1 is fixedly connected, the middle of the support cross plate 8 is provided with a limit hole 4, and a push-pull assembly 5 is slidably arranged in the limit hole 4. One side of the push-pull assembly 5 is fixedly connected with a stretching mechanism 6, and the other The side is fixedly connected to the middle hook 7 through the connecting plate 11, the stretching mechanism 6 drives the push-pull assembly 5 to do linear reciprocating motion, and the push-pull assembly 5 drives the middle pull hook 7 to move in the front and rear directions of the knife edge;

The bottom end of the push-pull assembly 5 is connected to the reversing drive mechanism 3 through the limit hole 4, and the reversing drive mechanism 3 is respectively connected to the two side hooks 9 through two connecting rods 10. The push-pull assembly 5 is in a linear motion. At the same time, the reversing drive mechanism 3 is driven, and the reversing drive mechanism 3 converts the linear motion into rotational motion, and drives the two side hooks 9 to swing in the left and right directions of the knife edge through the connecting rod 10 .

Further, the lifting mechanism 2 is specifically an electric push rod, the bottom end of the electric push rod is fixedly connected with the fixing seat 1 , and the rod end is fixedly connected with the support transverse plate 8 .

Further, the push-pull assembly 5 includes an upper push-pull plate 51 and a lower push-pull rod 52. The lower push-pull rod 52 is disposed at the bottom of the upper push-pull plate 51 and integrally formed with the upper push-pull plate 51. The push-pull assembly 5 composed of the push-pull rod 52 is set in a T-shape, the lower push-pull rod 52 is slidably arranged inside the limit hole 4 and the bottom end is fixedly connected with the reversing drive mechanism 3 , the T-shaped push-pull assembly 5 can make the connecting plate 11 Drive the middle hook 7 to move stably, so that the reversing drive mechanism 3 works stably.

Further, the reversing drive mechanism 3 includes two rotating shafts 31 , two gears 32 and two side racks 33 , the two rotating shafts 31 are arranged symmetrically up and down and the middle part is connected by a ball bearing 34 , and the two gears 32 are respectively fixed are arranged on the two rotating shafts 31 , the two connecting rods 10 are arranged between the two gears 32 and are respectively fixedly connected with the two rotating shafts 31 , the two side racks 33 are respectively arranged on the outer sides of the two gears 32 , and The side rack 33 is engaged with the gear 32 , and the side rack 33 is fixedly connected to the lower push-pull rod 52 through the L-shaped bracket 35 .

Further, the top end of a rotating shaft 31 located above is fixedly connected to the support cross plate 8 through a bearing, and the bottom end of the rotating shaft 31 located at the bottom is connected to a support frame 36 through a bearing. The other end is fixedly connected to the support cross plate 8 , and the connection between the support frame 36 and the support cross plate 8 is disposed on one side of the limiting hole 4 .

Further, the stretching mechanism 6 is specifically an electric push rod. One end of the electric push rod is fixedly connected to the support transverse plate 8 , and the other end is fixedly connected to the push-pull assembly 5 .

Further, a sliding foot 13 is fixed at the bottom of the connecting plate 11 , the sliding foot 13 is slidably arranged in the limit hole 4 , and the support plate cooperates with the limit hole 4 through the sliding foot 13 at the bottom, so that the entire support plate can be When driving the middle hook 7 to move, it is more stable and does not shift.

The specific implementation scenario is as follows: when the present invention is in use, the lifting mechanism 2 can drive the support horizontal plate 8 and the three pull hooks to move to a suitable wound, and then control the stretching mechanism 6 to work, and the electric push rod is connected through the upper push-pull plate 51 and the connection. The plate 11 drives the middle hook 7 to move back to realize the traction of the wound in one direction. At the same time, the lower push-pull rod 52 and the L-shaped bracket 35 drive the side rack 33 to move to the left. At this time, the side rack 33 and the gear 32 Meshing, thereby driving the gear 32 to rotate, the two gears 32 rotate to the outside respectively, and the two side hooks 9 can be pulled to both sides of the wound through the rotating shaft 31 and the connecting rod 10 to achieve traction in the left and right directions. The operation of the mechanism 6 can realize the traction in three directions at the same time. The whole device has a simple structure, low cost, energy saving and convenient operation.

Referring to FIG. 7 of the specification, the side hooks 9 and the connecting rods 10 are movably connected by pins 12 , the connecting rods 10 are arranged in an arc shape, and the two connecting rods 10 and the two side hooks 9 are respectively arranged symmetrically about the connecting plate 11 .

The specific implementation scene is as follows: when the side retractor 9 is retracted to both sides, the side retractor 9 can be better adapted to the constantly changing wound direction caused by the retraction through the active connection between the side retractor 9 and the connecting rod 10, and the side retractor The retraction hook 9 fits the wound, which is easier to retract and reduces the pain caused by retraction.

Example 2:

The difference from Embodiment 1 is that the lifting mechanism 2 is specifically a manual lifting screw, the bottom end of the manual lifting screw is fixedly connected to the fixing base 1 , and the rod end is fixedly connected to the support transverse plate 8 .

The stretching mechanism 6 is specifically a pull rod, one end of the pull rod is fixedly connected with the support transverse plate 8 , and the other end is fixedly connected with the push-pull assembly 5 .

The specific implementation scenario is as follows: the present invention can also adopt a manual control method. When in use, the up and down positions of the support plate and the draw hook can be adjusted by manually lifting the screw rod. Open, the whole device does not need to be powered on, and the operation is more convenient.

Working principle: When using, fix the whole device on the operating table, adjust the height of the device through the lifting mechanism 2 to make it adapt to the wound position, after the three retractors are placed on the wound, start the stretching mechanism 6, which passes the push-pull assembly 5 Drive the middle hook 7 to pull the wound in one direction, while the push-pull assembly 5 drives the side rack 33 to move, which meshes with the gear 32 to realize linear and circular motion. The gear 32 drives the connecting rod 10 to rotate through the rotating shaft 31, and the two connecting rods 10 drives the side retractor 9 to swing to achieve traction in the other two directions of the wound, that is, to achieve three-way retraction of the lumbar spine through a stretching mechanism 6 .

Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present invention, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the claimed protection of the present invention.

Claims (8)

1. The utility model provides a lumbar vertebrae three-dimensional wicresoft retractor, includes fixing base (1), elevating system (2) and supports diaphragm (8), support diaphragm (8) bottom through elevating system (2) and fixing base (1) fixed connection, its characterized in that: a limiting through hole (4) penetrates through the middle of the supporting transverse plate (8), a push-pull assembly (5) is arranged in the limiting through hole (4) in a sliding mode, one side of the push-pull assembly (5) is fixedly connected with a stretching mechanism (6), the other side of the push-pull assembly is fixedly connected with a middle draw hook (7) through a connecting plate (11), the stretching mechanism (6) drives the push-pull assembly (5) to do linear reciprocating motion, and the push-pull assembly (5) drives the middle draw hook (7) to move in the front-back direction of the knife edge;

the bottom end of the push-pull assembly (5) penetrates through the limiting through hole (4) to be connected with the reversing driving mechanism (3), the reversing driving mechanism (3) is connected with the two side drag hooks (9) through the two connecting rods (10), the push-pull assembly (5) drives the reversing driving mechanism (3) while doing linear motion, the reversing driving mechanism (3) converts the linear motion into rotary motion, and the two side drag hooks (9) are driven to swing in the left direction and the right direction of the knife edge through the connecting rods (10).

2. The lumbar three-way minimally invasive retractor according to claim 1, wherein: elevating system (2) specifically are electric putter or manual lift lead screw, elevating system (2) bottom and fixing base (1) fixed connection, rod end and support diaphragm (8) fixed connection.

3. The lumbar three-way minimally invasive retractor according to claim 1, wherein: the push-pull assembly (5) comprises an upper push-pull plate (51) and a lower push-pull rod (52), the lower push-pull rod (52) is arranged at the bottom of the upper push-pull plate (51) and integrally formed with the upper push-pull plate (51), the push-pull assembly (5) consisting of the upper push-pull plate (51) and the lower push-pull rod (52) is T-shaped, the lower push-pull rod (52) is slidably arranged in the limiting through hole (4), and the bottom end of the lower push-pull rod is fixedly connected with the reversing driving mechanism (3).

4. The lumbar three-way minimally invasive retractor according to claim 3, wherein: reversing driving mechanism (3) include two pivot (31), two gears (32) and two side racks (33), two pivot (31) longitudinal symmetry set up and the middle part passes through ball bearing (34) and connects, two gears (32) are fixed respectively and are set up on two pivot (31), two connecting rod (10) all set up between two gears (32) and respectively with two pivot (31) fixed connection, two side racks (33) set up respectively in the outside of two gears (32), and side rack (33) are connected with gear (32) meshing, side rack (33) are through L type support (35) and push down pull rod (52) fixed connection.

5. The lumbar three-way minimally invasive retractor according to claim 4, wherein: the top end of a rotating shaft (31) positioned above is fixedly connected with a supporting transverse plate (8) through a bearing, the bottom end of the rotating shaft (31) positioned at the bottom is connected with a supporting frame (36) through a bearing, the cross section of the supporting frame (36) is set to be L-shaped, the other end of the supporting frame (36) is fixedly connected with the supporting transverse plate (8), and the joint of the supporting frame (36) and the supporting transverse plate (8) is arranged on one side of a limiting perforation hole (4).

6. The lumbar three-way minimally invasive retractor according to claim 1, wherein: the stretching mechanism (6) is specifically an electric push rod or a pull rod, one end of the stretching mechanism (6) is fixedly connected with the supporting transverse plate (8), and the other end of the stretching mechanism is fixedly connected with the push-pull assembly (5).

7. The lumbar three-way minimally invasive retractor according to claim 1, wherein: side drag hook (9) and connecting rod (10) are through pin (12) swing joint, connecting rod (10) set up to the arc, and two connecting rods (10) and two side drag hooks (9) set up about connecting plate (11) symmetry respectively.

8. The lumbar three-way minimally invasive retractor according to claim 1, wherein: the bottom of the connecting plate (11) is fixedly provided with a sliding foot (13), and the sliding foot (13) is arranged in the limiting through hole (4) in a sliding mode.

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