Drag hook device convenient to operate

Abstract

The utility model discloses a drag hook device convenient to operate, and belongs to the technical field of medical instruments, the drag hook device is characterized by comprising a handle, a sleeve and a pull rod, the end, away from the handle, of the pull rod is connected with a connecting pipe, the connecting pipe is in sliding connection with the sleeve, the connecting pipe extends out of the sleeve and is connected with a ball cup, and the ball cup is connected with the handle. The ball cup is used for containing an instrument connector. A supporting column is arranged in the connecting pipe, the supporting column is connected with a first positioning pin, a sliding hole is formed in the connecting pipe, the first positioning pin penetrates through the sliding hole to be connected with the sleeve and used for achieving fixation of the supporting column and the sleeve, and when the supporting column abuts against an instrument connector, fixation of the instrument connector is achieved. And the effect of prolonging the service life of the drag hook device is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a retractor device that is easy to operate. Background Art

[0002] Retractor device is a medical device commonly used in surgical operations, which can help doctors accurately fix and adjust the direction during surgery.

[0003] The traditional retractor device is not only complex in structure, but also requires temporary assembly during surgery. The assembled retractor device often has assembly errors and is inconvenient to use. The patent No. 201621142102.8 describes the retractor device, which includes a handle, a clamping tube, a sleeve, a top column, a main body screw, a spring, a pull rod, a chuck and an instrument connector. The locking of the instrument connector is achieved by rotating the tail end handle, pulling the pull rod through the threaded fit of the main body screw and the handle. Since the pull rod is assembled with the chuck through a pin, the chuck is pulled back by the force of the locating pin when the handle is rotated, and finally the instrument connector is held and locked. However, long-term use of this structure will cause the locating pin to deform, resulting in locking and inadequate fixation, which will seriously affect the surgical operation. Utility Model Content

[0004] In order to increase the service life of a retractor device, the utility model provides a retractor device which is easy to operate.

[0005] The utility model provides a convenient-to-operate hook device that adopts the following technical solutions:

[0006] A hook device with easy operation includes a handle, a sleeve and a pull rod, wherein the end of the pull rod away from the handle is connected to a connecting tube, the connecting tube is slidably connected to the sleeve, the connecting tube extends out of the sleeve and is connected to a ball head seat, and the ball head seat is used to hold an instrument joint; a support column is provided inside the connecting tube, the support column is connected to a first positioning pin, a sliding hole is opened on the connecting tube, the first positioning pin passes through the sliding hole and is connected to the sleeve, which is used to realize the fixation of the support column and the sleeve, and when the support column abuts against the instrument joint, the instrument joint is fixed.

[0007] By adopting this technical solution, turning the handle drives the pull rod, which applies force to the connecting tube, thereby pulling the ball head seat to move. The instrument joint inside the ball head seat abuts the support column, thus securing the instrument joint. The pull rod and connecting tube form a multi-link structure. When subjected to force, the pull rod and connecting tube move in a combined manner, distributing force transmission and distributing the load across the internal components. This allows the entire mechanism to withstand greater forces and torques, reduces the possibility of the locking structure locking or improper fixation after long-term use, and increases its service life.

[0008] Preferably, a first limiting portion is provided at one end of the sleeve close to the ball head seat, and a second limiting portion is provided at one end of the ball head seat close to the sleeve, and the distance between the first limiting portion and the second limiting portion is the same as the distance between the instrument connector and the support column.

[0009] By adopting the above technical solution, when the user rotates the handle, the abutment between the first limit portion and the second limit portion is a signal that the instrument connector is in place, ensuring that the instrument connector can be accurately fixed in the predetermined position and reducing the force instability factor caused by excessive movement.

[0010] Preferably, a movable groove is provided on the end surface of the sleeve away from the handle, the connecting tube is arranged in the movable groove, and the depth of the movable groove is not less than the distance between the first limiting portion and the second limiting portion.

[0011] By adopting the above technical solution, the depth design of the movable groove ensures the stable sliding of the connecting tube in the movable groove, reducing the occurrence of the situation where the instrument connector cannot be locked.

[0012] Preferably, a connector is provided between the pull rod and the connecting tube, one end of the connector is connected to the pull rod, and the other end of the connector is inserted into the connecting tube and connected to the connecting tube via a second positioning pin.

[0013] By adopting the above technical solution, turning the handle drives the pull rod to move. This movement of the pull rod applies force to the connector, which, through the second locating pin, drives the connecting tube to apply force, thereby pulling the ball head seat to move, causing the support column to abut against the instrument connector in the ball head seat, thereby securing the instrument connector. The connector, second locating pin, and connecting tube cooperate to simultaneously distribute the pull rod tension, further reducing the possibility of the locking structure locking or improper fixation due to long-term use, thereby increasing the service life of the pull rod device.

[0014] Preferably, the outer diameter of the connector at the end away from the pull rod matches the inner diameter of the connecting tube.

[0015] By adopting the above technical solution, the connector can be smoothly inserted into the connecting pipe, ensuring connection stability while improving assembly efficiency.

[0016] Preferably, the diameter of the support column matches the inner diameter of the connecting tube.

[0017] By adopting the above technical solution, this design ensures the stability and smoothness of the support column in the connecting tube, avoids shaking or jamming of the instrument connector due to size mismatch during use, and improves the operating accuracy and reliability of the entire retractor device.

[0018] Preferably, the outer diameter of the ball seat is the same as the outer diameter of the sleeve.

[0019] By adopting the above technical solution, the outer diameter of the ball head seat is the same as the outer diameter of the sleeve. Compared with the outer diameter of the chuck in the background technology, the outer diameter of the ball head seat is reduced, so that the appearance of the retractor device is more uniform during use. At the same time, during use, the possibility of operation blocking the line of sight is reduced, and the jamming or discomfort caused by different outer diameters of components is reduced.

[0020] Preferably, the end surface of the first positioning pin is not higher than the outer side wall of the sleeve.

[0021] By adopting the above technical solution, the smoothness of the surface of the retractor device is ensured during operation, which helps to reduce unnecessary stimulation or damage to surrounding tissues.

[0022] In summary, the present invention has the following beneficial effects:

[0023] Turning the handle moves the pull rod, which applies force to the connecting tube, thereby pulling the ball head seat to move. The instrument joint inside the ball head seat abuts the support column, securing the instrument joint. The pull rod and connecting tube form a multi-link structure. When subjected to force, the pull rod and connecting tube move in a combined manner, dispersing the force transmission and distributing the load across the internal components. This allows the entire mechanism to withstand greater forces and torques, reduces the possibility of locking and improper fixation due to long-term use, and increases the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a schematic diagram of the overall structure of a hook device which is easy to operate.

[0025] Figure 2 It is a front view of a retractor device that is easy to operate.

[0026] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0027] Description of reference numerals:

[0028] 1. Handle; 2. Sleeve; 21. Movable groove; 22. First limiting part; 3. Pull rod; 4. Connecting head; 5. Connecting tube; 51. Sliding hole; 6. Ball head seat; 61. Second limiting part; 7. Support column; 8. First positioning pin; 9. Second positioning pin. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0030] In the description of the embodiments of this application, words such as "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "for example" or "for instance" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "for example" or "for instance" is intended to present the relevant concepts in a concrete manner.

[0031] In the description of the embodiments of the present application, the term "multiple" means two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0032] A convenient hook device, refer to Figure 1 、 Figure 2 and Figure 3 , comprising a handle 1, a sleeve 2, and a pull rod 3. The end of the pull rod 3 away from the handle 1 is connected to a connecting tube 5, which is slidably connected to the sleeve 2. The connecting tube 5 extends out of the sleeve 2 and is fixedly connected to a ball head seat 6, which is used to hold the instrument connector. A support column 7 is provided inside the connecting tube 5, and the support column 7 is connected to a first positioning pin 8. A sliding hole 51 is formed on the connecting tube 5, and the first positioning pin 8 passes through the sliding hole 51 and is connected to the sleeve 2. The first positioning pin 8 is used to fix the support column 7 to the sleeve 2, and the sliding hole 51 can allow the first positioning pin 8 to move. When the support column 7 abuts the instrument connector, the instrument connector is fixed.

[0033] Turning handle 1 moves pull rod 3, which applies force to connecting tube 5, thereby moving ball seat 6. The instrument joint inside ball seat 6 abuts against support column 7, securing the instrument joint. Pull rod 3 and connecting tube 5 form a multi-link structure that, when subjected to force, produces combined motion. This disperses force transmission, distributing the load across the internal components. This allows the entire mechanism to withstand greater forces and torques, reduces the likelihood of the locking mechanism becoming locked or improperly secured over time, and increases its service life.

[0034] Reference Figure 3 The first positioning pin 8 is plugged into both the support column 7 and the sleeve 2, and the end surface of the first positioning pin 8 is lower than the outer wall of the sleeve 2. This ensures the smoothness of the surface of the retractor device during operation, helping to reduce unnecessary stimulation or damage to surrounding tissues.

[0035] Reference Figure 3 A first limiting portion 22 is provided at one end of the sleeve 2 close to the ball head seat 6, and a second limiting portion 61 is provided at one end of the ball head seat 6 close to the sleeve 2. The distance between the first limiting portion 22 and the second limiting portion 61 is the same as the distance between the instrument joint and the support column 7.

[0036] When the user rotates the handle 1, the abutment between the first limit portion 22 and the second limit portion 61 is a signal that the instrument connector is in place, ensuring that the instrument connector can be accurately fixed in the predetermined position and reducing the force instability factor caused by excessive movement.

[0037] Reference Figure 2 and Figure 3 A cylindrical movable groove 21 is defined on the end surface of the sleeve 2, distal from the handle 1. The axis of the movable groove 21 coincides with the axis of the sleeve 2, and the diameter of the movable groove 21 is greater than the diameter of the sleeve 2. The depth of the movable groove 21 is no less than the distance between the first stop 22 and the second stop 61. The connecting tube 5 is disposed within the movable groove 21, and the outer diameter of the connecting tube 5 matches the diameter of the movable groove 21.

[0038] The depth design of the movable groove 21 ensures the stable sliding of the connecting tube 5 in the movable groove 21, reducing the occurrence of the situation where the instrument connector cannot be locked.

[0039] Reference Figure 3 A connector 4 is provided between the tie rod 3 and the connecting tube 5, and the tie rod 3 and the connector 4 are plugged into each other. The outer diameter of the connector 4 at the end closest to the tie rod 3 matches the inner diameter of the sleeve 2, and the connector 4 slides into contact with the sleeve 2. The end of the connector 4 away from the tie rod 3 extends into the connecting tube 5, and the outer diameter of the connector 4 at the end away from the tie rod 3 matches the inner diameter of the connector 4.

[0040] When the pull rod 3 is pulled, the joint, the second positioning pin 9 and the connecting tube 5 can simultaneously disperse the pulling force, reducing the possibility of the locking structure being locked and not fixed in place due to long-term use, and improving the service life of the pull rod 3 device.

[0041] Reference Figure 3 The connector 4 is plugged with a second positioning pin 9, which is plugged into the connecting tube 5 to fix the connector 4 and the connecting tube 5. The end surface of the second positioning pin 9 is lower than the outer wall of the connecting tube 5 to reduce the possibility of the second positioning pin 9 interfering with the movement process.

[0042] Reference Figure 3 The outer diameter of the ball head seat 6 is the same as the outer diameter of the sleeve 2, which makes the appearance of the retractor device more uniform during use. At the same time, during use, the possibility of operation blocking the line of sight is reduced, and the jamming or discomfort caused by different outer diameters of components is reduced.

[0043] The operating principle of this application is as follows: turning the handle 1 drives the pull rod 3 to move. When the pull rod 3 moves, the joint, second positioning pin 9, and connecting tube 5 are simultaneously subjected to force, thereby pulling the ball head seat 6 to move. The instrument joint in the ball head seat 6 abuts against the support column 7, thereby securing the instrument joint. Among them, the multi-link structure design of the pull rod 3, joint, and connecting tube 5 is a combined movement when subjected to force, which can disperse the force transmission. The load is dispersed among the various components of the internal structure, allowing the entire mechanism to withstand greater force and torque, reducing the possibility of the locking structure locking and improper fixation due to long-term use, and increasing the service life.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A retractor device that is easy to operate, comprising a handle (1), a sleeve (2) and a pull rod (3), characterized in that: The end of the pull rod (3) away from the handle (1) is connected to a connecting tube (5), the connecting tube (5) is slidably connected to the sleeve (2), the connecting tube (5) extends out of the sleeve (2) and is connected to a ball head seat (6), and the ball head seat (6) is used to hold an instrument connector; A support column (7) is provided inside the connecting tube (5), and the support column (7) is connected to a first positioning pin (8). A sliding hole (51) is provided on the connecting tube (5), and the first positioning pin (8) passes through the sliding hole (51) and is connected to the sleeve (2) for achieving fixation of the support column (7) and the sleeve (2). When the support column (7) abuts against the instrument connector, the instrument connector is fixed.

2. The easy-to-operate hook device according to claim 1, characterized in that: The sleeve (2) is provided with a first limiting portion (22) at one end close to the ball head seat (6), and the ball head seat (6) is provided with a second limiting portion (61) at one end close to the sleeve (2), and the distance between the first limiting portion (22) and the second limiting portion (61) is the same as the distance between the instrument joint and the support column (7).

3. The easy-to-operate hook device according to claim 2, characterized in that: A movable groove (21) is provided on the end surface of the sleeve (2) away from the handle (1), and the connecting pipe (5) is arranged in the movable groove (21). The depth of the movable groove (21) is not less than the distance between the first limiting portion (22) and the second limiting portion (61).

4. The easy-to-operate retractor device according to claim 1, characterized in that: A connector (4) is provided between the pull rod (3) and the connecting tube (5), one end of the connector (4) is connected to the pull rod (3), and the other end of the connector (4) is inserted into the connecting tube (5) and connected to the connecting tube (5) via a second positioning pin (9).

5. The easy-to-operate hook device according to claim 4, characterized in that: The outer diameter of the end of the connector (4) away from the pull rod (3) matches the inner diameter of the connecting tube (5).

6. The easy-to-operate retractor device according to claim 1, characterized in that: The diameter of the support column (7) matches the inner diameter of the connecting tube (5).

7. The easy-to-operate retractor device according to claim 1, characterized in that: The outer diameter of the ball seat (6) is the same as the outer diameter of the sleeve (2).

8. The easy-to-operate retractor device according to claim 1, characterized in that: The end surface of the first positioning pin (8) is not higher than the outer side wall of the sleeve (2).

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