Hand-operated bidirectional retractor

Abstract

The utility model discloses a hand-operated two-way retractor which comprises a left distraction foot, a right distraction foot, a connecting support, a nailing guide pipe, a rack, an opening and closing driving assembly and a limiting locking assembly. By means of the mode, the hand-operated two-way retractor can utilize the opening and closing driving assembly to independently drive the two distraction feet to conduct two-way opening and closing driving, meet different retractor requirements and improve the using flexibility and convenience of the retractor, and can utilize the limiting and locking assembly to conduct limiting and locking on the retractor position, so that the hand-operated two-way retractor is convenient to use. And the use safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of tow puller technology, and in particular to a hand-cranked bidirectional tow puller. Background Technology

[0002] A retractor is a common medical device mainly used in orthopedic surgery to expose the surgical field, protect tissues, and prevent accidental injury.

[0003] However, in traditional retractors, only one arm is movable while the other arm is fixed. This limits operation to a specific direction, resulting in poor flexibility. Furthermore, during use, it is easy for the retractor arm to detach from the drive rack due to misoperation, affecting the normal operation of the retractor. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A hand-cranked two-way retractor is provided, comprising: a left expansion leg, a right expansion leg, a connecting bracket, an upper nail guide tube, a rack, an opening and closing drive assembly, and a limit locking assembly.

[0006] The left and right supporting legs are arranged opposite to each other. The connecting bracket is located on the top of the left and right supporting legs. The upper nail guide is connected to the connecting bracket. The left and right supporting legs are horizontally connected with movable adjustment cavities. The rack passes through the movable adjustment cavities on the left and right supporting legs respectively. The sidewalls of the left and right supporting legs are each provided with an opening and closing drive assembly. The opening and closing drive assembly is connected to the rack to independently adjust the position or distance of the left and right supporting legs. The limiting locking assembly is movably connected to the opening and closing drive assembly to lock the position of the left and right supporting legs respectively.

[0007] The opening and closing drive assembly includes a gear that meshes with a rack and a wrench that drives the gear to rotate in the movable adjustment cavity, so that the left and right opening feet move left and right along the rack under the action of the gear and the rack.

[0008] The limiting locking assembly includes a limiting buckle, a guide contact surface, and locking teeth. The limiting buckle is rotatably mounted on the left and right spreading feet below the gear. The top of the limiting buckle is provided with the guide contact surface, which is always in close contact with the outer edge of the gear, so that the gear drives the limiting buckle to swing back and forth synchronously when it rotates. Each side of the guide contact surface is provided with a locking tooth, which engages with the gear to lock the position of the left and right spreading feet.

[0009] In a preferred embodiment of this utility model, the upper nail guide tube is connected to the connecting bracket by a joint screw.

[0010] In a preferred embodiment of the present invention, the opening and closing drive assembly further includes a connecting column, the wrench is rotatably connected to the left and right supporting feet through the connecting column, and the gear is provided on the connecting column located in the movable adjustment cavity; wherein, the gear side facing away from the wrench is movably connected to the left and right supporting feet through a gear nut.

[0011] In a preferred embodiment of this utility model, the outer end of the connecting post extends into the wrench, and the wrench is connected to the connecting post via a wrench pin. The outer end of the connecting post has an axially formed groove, and a steel ball is connected to the groove via a compression spring and is movably connected to a positioning groove on the wrench.

[0012] In a preferred embodiment of the present invention, the limiting buckle is disposed in the movable adjustment cavity, or its upper part extends into the movable adjustment cavity.

[0013] In a preferred embodiment of this utility model, the limiting buckle is movably connected to the left and right supporting legs by limiting rivets.

[0014] In a preferred embodiment of this utility model, the maximum outward swing angle of the limiting buckle is 45°.

[0015] In a preferred embodiment of this utility model, one end of the retaining spring is connected to the left and right support feet via a retaining spring rivet, and the other end is connected to the limiting buckle to drive the limiting buckle to reset.

[0016] In a preferred embodiment of this utility model, the guide contact surface is an upwardly arched arc-shaped structure.

[0017] In a preferred embodiment of this utility model, the swing directions of the limiting buckles on the left and right supporting feet are opposite.

[0018] The beneficial effects of this utility model are: it can not only use the opening and closing drive component to independently drive the two supporting legs to perform bidirectional opening and closing drive, meet different opening needs, and improve the flexibility and convenience of using the retractor, but also use the limit locking component to limit and lock the opening position, thereby improving the safety of use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1This is a schematic diagram of a preferred embodiment of a hand-cranked bidirectional puller according to the present invention;

[0021] Figure 2 This is a side view of a preferred embodiment of a hand-cranked bidirectional puller of this utility model;

[0022] Figure 3 This is a partially enlarged structural schematic diagram of a preferred embodiment of a hand-cranked bidirectional puller of this utility model. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Please see Figure 1-3 The embodiments of this utility model include:

[0025] A hand-cranked bidirectional retractor, the structure of which includes a left supporting foot 1, a right supporting foot 2, a connecting bracket 3, an upper nail guide tube 4, a rack 5, an opening and closing drive assembly 6, and a limit locking assembly 7.

[0026] The connecting bracket is located at the top of the left and right expansion legs. The upper nail guide is connected to the connecting bracket via a joint screw. The left and right expansion legs are positioned opposite each other, and a movable adjustment cavity 8 is horizontally connected to both the left and right expansion legs. The rack passes through the movable adjustment cavities on the left and right expansion legs respectively, so that both expansion legs can be separated by the rack. This not only allows for the replacement of different expansion legs, connecting brackets, and upper nail guides as needed, but also facilitates cleaning and disinfection. Each of the left and right expansion legs has an opening and closing drive assembly on its side wall. The opening and closing drive assembly is connected to the rack to independently adjust the position or spacing of the left / right expansion legs. The limit locking assembly is movably connected to the opening and closing drive assembly to lock the position of the left / right expansion legs, preventing loosening and positional deviation during use, and improving the stability of the retractor.

[0027] More preferably, the bottom of the upper nail conduit is connected to the connecting bracket by a locking nut.

[0028] The opening and closing drive assembly 6 includes a wrench 61, a connecting post 62, and a gear 63. The wrench is rotatably connected to the left / right opening feet through the connecting post, and a gear is provided on the connecting post located in the movable adjustment cavity. The gear meshes with the rack and is located below the rack. The gear rotates in the movable adjustment cavity under the action of the wrench and the connecting post, so as to drive the left / right opening feet to move left and right along the rack.

[0029] More preferably, one end of the connecting column is movably connected to the left / right spreading foot on one side of the movable adjustment cavity, and the other end extends through the movable adjustment cavity to the outside of the left / right spreading foot.

[0030] More preferably, the wrench is connected to the connecting post via a wrench pin.

[0031] More preferably, the outer end of the connecting post extends into the wrench, and a groove is axially provided on its outer end. The steel ball is connected to the groove by a compression spring and is movably connected to the positioning groove on the wrench, so as to facilitate the disassembly and positioning of the wrench.

[0032] More preferably, the gear side facing away from the wrench is movably connected to the left / right support feet via a gear nut.

[0033] The limiting locking assembly 7 includes a limiting buckle 71, a guide contact surface 72, a locking tooth 73, and a retaining spring 74. The limiting buckle is rotatably mounted on the left / right spreading feet below the gear, and its upper part extends into the movable adjustment cavity. The top of the limiting buckle is provided with a guide contact surface that is always in close contact with the outer edge of the gear (or its teeth), so that there is a certain friction between the guide contact surface and the gear, so that the gear can synchronously drive the limiting buckle to swing back and forth when it rotates. Each side of the guide contact surface is provided with a locking tooth. When the limiting buckle moves inward or outward to its limit position with the movement of the left and right spreading feet, the locking tooth is locked between the teeth of the gear to lock the position of the left and right spreading feet, improve the accuracy and stability of the opening and closing of the retractor, and prevent the rack from disengaging from the spreading feet.

[0034] One end of the retaining ring is connected to the left / right support foot via a retaining ring rivet, and the other end is connected to the upper part of the limit buckle to drive the limit buckle to reset, thus preventing the limit retaining ring from being subjected to uneven force.

[0035] Specifically, when the wrench drives the gear to rotate counterclockwise, the left / right spreading feet move inward along the rack. At this time, under the action of the gear, the lower part of the limit buckle swings outward and the locking protrusion located on the outer side of the guide contact surface approaches the gear. When the left / right spreading feet move inward to the extreme position, the outer locking protrusion abuts or jams the gear to prevent it from rotating again, thus completing the position locking.

[0036] When the wrench rotates the gear clockwise, the left / right extension feet move outward along the rack. At this time, under the action of the gear, the lower part of the limit buckle swings inward and the locking protrusion located on the inner side of the guide contact surface approaches the gear. When the left / right extension feet move outward to the outward limit position, the outer locking protrusion abuts or jams the gear to prevent it from rotating again, thus completing the position locking.

[0037] More preferably, the upper part of the limiting buckle is movably connected to the left / right spreading feet via a limiting rivet.

[0038] More preferably, the guide contact surface has an upwardly arched arc-shaped structure.

[0039] More preferably, the swing directions of the limiting buckles on the left and right outstretched feet are opposite.

[0040] The advantages of this hand-cranked bidirectional retractor are: it can not only independently drive the two supporting legs to open and close in both directions using the opening and closing drive component to meet different retracting needs and improve the flexibility and convenience of using the retractor, but also can use the limit locking component to limit and lock the retracting position, thereby improving the safety of use.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hand-cranked bidirectional retractor, characterized in that, include: Left support foot, right support foot, connecting bracket, upper nail guide tube, rack, opening and closing drive assembly, and limit locking assembly. The left and right supporting legs are arranged opposite to each other. The connecting bracket is located on the top of the left and right supporting legs. The upper nail guide is connected to the connecting bracket. The left and right supporting legs are horizontally connected with movable adjustment cavities. The rack passes through the movable adjustment cavities on the left and right supporting legs respectively. The sidewalls of the left and right supporting legs are each provided with an opening and closing drive assembly. The opening and closing drive assembly is connected to the rack to independently adjust the position or distance of the left and right supporting legs. The limiting locking assembly is movably connected to the opening and closing drive assembly to lock the position of the left and right supporting legs respectively. The opening and closing drive assembly includes a gear that meshes with a rack and a wrench that drives the gear to rotate in the movable adjustment cavity, so that the left and right opening feet move left and right along the rack under the action of the gear and the rack. The limiting locking assembly includes a limiting buckle, a guide contact surface, and locking teeth. The limiting buckle is rotatably mounted on the left and right spreading feet below the gear. The top of the limiting buckle is provided with the guide contact surface, which is always in close contact with the outer edge of the gear, so that the gear drives the limiting buckle to swing back and forth synchronously when it rotates. Each side of the guide contact surface is provided with a locking tooth, which engages with the gear to lock the position of the left and right spreading feet.

2. The hand-cranked bidirectional retractor according to claim 1, characterized in that, The upper nail guide tube is connected to the connecting bracket via a joint screw.

3. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The opening and closing drive assembly also includes a connecting column, and the wrench is rotatably connected to the left and right support feet through the connecting column. The gear is provided on the connecting column located in the movable adjustment cavity. The gear side facing away from the wrench is movably connected to the left and right support feet through a gear nut.

4. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The outer end of the connecting post extends into the wrench, and the wrench is connected to the connecting post through a wrench pin. The outer end of the connecting post has an axial groove, and a steel ball is connected to the groove through a compression spring and is movably connected to the positioning groove on the wrench.

5. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The limiting buckle is disposed inside the movable adjustment cavity, or its upper part extends into the movable adjustment cavity.

6. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The limiting buckle is movably connected to the left and right support legs via limiting rivets.

7. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The maximum outward swing angle of the limiting buckle is 45°.

8. A hand-cranked bidirectional retractor according to claim 1, characterized in that, One end of the retaining ring is connected to the left and right support feet via a retaining ring rivet, and the other end is connected to the limiting buckle to drive the limiting buckle to reset.

9. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The guide contact surface has an upward-arched arc-shaped structure.

10. A hand-cranked bidirectional retractor according to claim 1, characterized in that, The limiting buckles on the left and right outstretched feet swing in opposite directions.

Images