Snakelike universal arm

Abstract

The utility model discloses a snakelike universal arm which comprises a steel cable, the surface of the steel cable is sleeved with a plurality of sections of universal joints, one end of the steel cable is provided with a tightening device, the other end of the steel cable is provided with a quick connection device, a spiral structure can be driven to tighten through hand rotation operation at the tail, connection at the joints is tighter, and the safety of the joint is improved. And the head part adopts a quick connecting device, so that surgical tools can be quickly replaced, and the surgical operation process is simplified.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a serpentine universal arm. Background Art

[0002] In minimally invasive spinal surgery, since the surgical site is deep and complex, extremely high flexibility and precision are required of the surgical instruments.

[0003] Traditional surgical instruments are often difficult to perform precise operations in narrow surgical spaces due to structural limitations. Summary of the invention

[0004] In view of the above problems, the utility model aims to provide a serpentine universal arm.

[0005] To achieve the technical purpose, the solution of the utility model is: a serpentine universal arm, including a steel cable, a surface of the steel cable is sleeved with multiple universal joints, one end of the steel cable is provided with a tightening device, and the other end of the steel cable is provided with a quick connection device.

[0006] Preferably, the tightening device comprises a tightening screw sleeved on one end of the steel cable, the outer wall of the tightening screw sleeve is provided with a linking screw, and the outer wall of the linking screw sleeve is provided with a tightening wheel.

[0007] Preferably, the tightening device also includes a stopper sleeved on the outer wall of the tightening screw, a bearing is arranged between the stopper and the connecting screw, one side of the stopper is connected to a connecting seat, a locking screw is arranged in the connecting seat, a locking wheel is connected below the locking screw, the locking wheel is at the bottom end of the connecting seat, and one side of the connecting seat is provided with a joint for connecting a universal joint.

[0008] Preferably: a locking arm is arranged above the locking screw, the locking arm is movably connected to the locking screw, a limiting groove for movement with the steel cable is arranged in the middle of the locking screw, a protrusion is arranged above the connecting seat, and a groove matching the locking arm is arranged on one side of the connecting seat.

[0009] Preferably, a bolt is provided at the other end of the steel cable, and a quick-connect device is provided at the outer arm of the bolt. The quick-connect device includes an inner core sleeved on the outer wall of the bolt, three through holes are provided on the outer wall of the inner core, a sliding sleeve is movably connected to the outer wall of the inner core, and a retaining ring is provided between the sliding sleeve and the inner core.

[0010] Preferably, each universal joint has an independent rotational degree of freedom.

[0011] Preferably, a slotted tightening screw for connecting to the outer wall of the steel cable is provided inside the tightening screw.

[0012] The beneficial effects of the utility model are:

[0013] 1. The snake-shaped universal arm is suitable for a variety of minimally invasive spinal surgeries, such as herniated disc, spinal fracture, etc. It has a wide range of uses, and the snake-shaped design enables the instrument to bend and stretch flexibly in a small space, adapt to complex surgical environments, and has strong flexibility.

[0014] 2. By manually rotating the tail, the spiral structure can be driven to tighten, making the connection at the joint tighter and improving the overall stability of the device.

[0015] 3. The head adopts a quick-connect device, which can quickly replace surgical tools and simplify the surgical operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is the three views of the structure of the utility model;

[0018] Figure 3 A schematic diagram of the structure where the connection seat is removed;

[0019] Figure 4 for Figure 3 Exploded view of.

[0020] In the figure: 1, steel cable 2, universal joint 3, tightening device 31, tightening screw 311, slotted tightening screw 32, connecting screw 33, tightening wheel 34, block 35, bearing 36, connecting seat 361, protrusion 37, locking screw 371, limiting groove 38, locking arm 39, locking wheel 4, quick connection device 41, inner core 42, sliding sleeve 43, retaining ring 5, bolt. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] As shown in the figure, the specific embodiment described in the utility model is a serpentine universal arm, including a steel cable 1, the surface of the steel cable 1 is provided with a plurality of universal joints 2, each of the universal joints 2 has an independent degree of rotational freedom, a tightening device 3 is provided at the tail of the steel cable 1, and a quick-connect device 4 is provided at the head of the steel cable 1.

[0023] The tightening device 3 includes a tightening screw 31 arranged at the tail of the steel cable 1, a slotted tightening screw 311 for connecting the outer wall of the steel cable 1 is arranged in the tightening screw 31, a link screw 32 is sleeved on the outer wall of the tightening screw 31, and a tightening wheel 33 is sleeved on the outer wall of the link screw 32. The tightening device 3 also includes a stopper 34 sleeved on the outer wall of the tightening screw 31, a bearing 35 is arranged between the stopper 34 and the link screw, a connecting seat 36 is connected to one side of the stopper 34, a locking screw 37 is rotatably connected in the connecting seat 36, and the locking screw 37 is rotatably connected in the connecting seat 36. A locking wheel 39 is rotatably connected to the bottom of 7, and the locking wheel 39 is at the bottom end of the connecting seat 36. A joint for connecting the universal joint 2 is provided on one side of the connecting seat 36. A locking arm 38 is provided above the locking screw 37, and the locking arm 38 is movably connected with the locking screw 37. A limiting groove 371 for movement with the steel cable 1 is provided in the middle of the locking screw 37. A protrusion 361 is provided above the connecting seat 36, and a groove matching with the locking arm 38 is provided on one side of the connecting seat 36. The bending and extension of the snake-type universal arm can be realized by the hand-rotating operation of the tail.

[0024] A bolt 5 is provided at the other end of the steel cable 1, and a quick-connecting device 4 is provided on the outer arm of the bolt 5. The quick-connecting device 4 includes an inner core 41 provided on the outer wall of the bolt 5, and three through holes are provided on the outer wall of the inner core 41. A sliding sleeve 42 is movably connected to the outer wall of the inner core 41, and a retaining ring 43 is provided between the sliding sleeve 42 and the inner core 41. In terms of the quick-connecting method of the head, the snake-type universal arm adopts a standardized interface design. Through simple plug-in and pull-out operations, different surgical tools, such as cutters, grabbers, etc., can be quickly replaced to meet different surgical needs.

[0025] Working principle:

[0026] The steel cable 1 passes through the tightening device 3, and the locking arm 38 rotates toward the protrusion 361 by rotating the locking wheel 39, thereby limiting the movement of the steel cable 1 in the limit groove 371 in the locking screw 37. When the tightening wheel 33 is rotated, the connecting screw 32 is driven, the connecting screw 32 drives the tightening screw 31, the tightening screw 31 drives the locking screw, and the locking screw drives the steel cable 1, so that the universal joint 2 on the steel cable 1 is tightened.

[0027] The universal joint 2 can be swung in any direction, and after being swung to a fixed position, the tightening wheel 33 is rotated to fix it.

[0028] According to the needs of the operation, select appropriate surgical tools and insert them into the sliding sleeve 42 of the serpentine universal arm. According to the actual situation of the surgical site, adjust the angle and position of each universal joint 2 of the serpentine universal arm through the tightening wheel 33 at the tail so that it can reach the surgical site smoothly.

[0029] After the operation is completed, the tail tightening wheel 33 is loosened to restore the snake-shaped universal arm to its natural state, which is convenient for removal and cleaning.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A serpentine universal arm, characterized in that: The invention comprises a steel cable (1), the surface of which is sleeved with a multi-section universal joint (2), one end of which is provided with a tightening device (3), and the other end of which is provided with a quick-connecting device (4).

2. The serpentine universal arm according to claim 1, characterized in that: The tightening device (3) comprises a tightening screw (31) sleeved on one end of the steel cable (1), a link screw (32) sleeved on the outer wall of the tightening screw (31), and a tightening wheel (33) sleeved on the outer wall of the link screw (32).

3. The serpentine universal arm according to claim 2, characterized in that: The tightening device (3) also includes a stopper (34) sleeved on the outer wall of the tightening screw (31), a bearing (35) is arranged between the stopper (34) and the connecting screw (32), one side of the stopper (34) is connected to a connecting seat (36), a locking screw (37) is arranged in the connecting seat (36), a locking wheel (39) is connected below the locking screw (37), the locking wheel (39) is located at the bottom end of the connecting seat (36), and one side of the connecting seat (36) is provided with a joint for connecting the universal joint (2).

4. The serpentine universal arm according to claim 3, characterized in that: A locking arm (38) is arranged above the locking screw (37), and the locking arm (38) is movably connected to the locking screw (37). A limiting groove (371) for movement with the steel cable (1) is arranged in the middle of the locking screw (37). A protrusion (361) is arranged above the connecting seat (36), and a groove matching the locking arm (38) is arranged on one side of the connecting seat (36).

5. The serpentine universal arm according to claim 1, characterized in that: The other end of the steel cable (1) is provided with a bolt (5), and the outer arm of the bolt (5) is provided with a quick-connect device (4). The quick-connect device (4) comprises an inner core (41) sleeved on the outer wall of the bolt (5), and the outer wall of the inner core (41) is provided with three through holes. The outer wall of the inner core (41) is movably connected with a sliding sleeve (42), and a retaining ring (43) is provided between the sliding sleeve (42) and the inner core (41).

6. The serpentine universal arm according to claim 1, characterized in that: Each universal joint (2) has an independent rotational degree of freedom.

7. The serpentine universal arm according to claim 2, characterized in that: A slotted tightening screw (311) for connecting to the outer wall of the steel cable (1) is arranged inside the tightening screw (31).

Images