Self-locking device of hemostatic forceps

Abstract

The present invention relates to a self-locking device for hemostatic forceps, wherein an upper slide rail and a lower slide rail are slidably connected in a housing of the self-locking device, an inner ratchet and outer gear structure are meshed between the upper slide rail and the lower slide rail, and a driving assembly is connected in the inner ratchet and outer gear structure. The self-locking device for hemostatic forceps of the present invention is more convenient to operate, improves the efficiency of operation, and the doctor can quickly complete the temporary fixation of the bone; and can realize the self-locking function of hemostatic forceps of any size.

Description

Technical Field

[0001] The invention patent relates to an orthopedic medical device, and more particularly to a self-locking device for hemostatic forceps and a method of using the same. Background Art

[0002] At present, orthopedic surgeons usually use two methods to temporarily fix bones: 1. After the doctor clamps the bone with hemostat for temporary fixation, he wraps the handheld part of the hemostat with gauze to fix it. 2. Use hemostat with tail clip.

[0003] The first method has the following problems and disadvantages: the gauze is not fixed firmly enough and is easy to fall off during the operation; the gauze is not fixed accurately enough and is easy to cause problems such as dislocation; the doctor needs to wrap the gauze during the operation, which increases the burden on the doctor. The second method has the following problems and disadvantages: there are requirements for the model of hemostatic forceps, and it cannot be compatible with any model of hemostatic forceps; the clamping distance is limited by the length of the tail clamp, and it cannot cover most of the required clamping distance.

[0004] In summary, the existing hemostatic forceps lack an auxiliary device that can firmly fix the hemostatic forceps, does not increase the burden on doctors, and is suitable for any type of hemostatic forceps. Summary of the invention

[0005] Purpose of the invention:

[0006] The present invention provides a self-locking device for hemostatic forceps, which aims to provide a self-locking device for hemostatic forceps of any type that can be quickly and accurately locked by a doctor during temporary fixation of the hemostatic forceps, thereby firmly fixing the hemostatic forceps without increasing the burden on the doctor.

[0007] Technical solution:

[0008] A self-locking device for hemostatic forceps has an upper slide rail and a lower slide rail connected in a housing for sliding up and down connection, an inner ratchet and outer gear structure meshing between the upper slide rail and the lower slide rail, and a driving assembly connected in the inner ratchet and outer gear structure.

[0009] The inner ratchet and outer gear structure is a circular ring structure, one end of its inner wall is provided with a circle of ratchet teeth, the other end of its inner wall is provided with a limit block, and its outer circle is provided with a gear, which is meshed with the upper slide rail and the lower slide rail. The limit block and the ratchet teeth can be engaged or disengaged with the drive component.

[0010] The driving assembly comprises a main disk body, a rotating shaft and a connecting assembly arranged on the rotating shaft. The rotating shaft passes through the main disk body and is gap-connected with the main disk body.

[0011] A first fixed block is arranged on one end face of the main disk body, and a limit clamping spring and a cylindrical shaft are arranged on the other end face. The first fixed block is clamped between the upper slide rail and the lower slide rail, and a stop claw is sleeved on the cylindrical shaft. The length of the stop claw is the vertical distance to the ratchet teeth, and the limit clamping spring can touch or disengage from the stop claw.

[0012] The connecting component is fixedly arranged from one end of the rotating shaft to the other end, and is sequentially arranged as a first baffle, a second baffle with a groove, a second fixed block and a third fixed block. The first baffle and the second baffle have a locking claw clamped between them. The second fixed block can be clamped on the upper baffle plate. The third fixed block is fixedly connected to the knob. The upper baffle plate is fixedly connected to the limit block of the inner ratchet and outer gear structure.

[0013] The ends of the upper slide rail and the lower slide rail facing away from the shell are provided with hanging plates, and the two hanging plates are respectively hung on the two ring openings of the hemostatic forceps.

[0014] One end of the hanging plate in contact with the ring opening is arranged as a straight plate or a C-shaped groove.

[0015] The first fixing block, the second fixing block and the third fixing block are square or any polygon.

[0016] The edges, corners and edges of the housing, upper slide rail, lower slide rail and knob are all designed as rounded protection structures.

[0017] The housing consists of a front housing and a rear housing, and the front housing and the rear housing are connected by snapping or bolting.

[0018] Advantages and effects:

[0019] 1. The self-locking device for hemostatic forceps of the present invention is more convenient to operate, which improves the efficiency of operation. The doctor can complete the temporary fixation of the bone within 3 seconds;

[0020] 2. The inner ratchet and outer gear structure in the self-locking device for the hemostatic forceps of the present invention ensures more accurate positioning and is less likely to move or loosen during surgery;

[0021] 3. The slide rail and baffle of the self-locking device for hemostatic forceps of the present invention can realize the self-locking function of hemostatic forceps of any size, thus achieving the compatibility of the equipment;

[0022] 4. The self-locking device for hemostatic forceps of the present invention is easy to operate and has no learning cost. Doctors can quickly and easily meet the needs of temporary bone fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the self-locking device;

[0024] Figure 2 is a front view of the self-locking device;

[0025] Figure 3 is a top view of the self-locking device;

[0026] Figure 4 It is an exploded view of the self-locking device;

[0027] Figure 5 It is a schematic diagram of the structure of internal gear and external ratchet;

[0028] Figure 6 This is a diagram of the state where the locking pawl is stuck in the ratchet teeth;

[0029] Figure 7 is a schematic diagram of the drive assembly structure in a locked state;

[0030] Figure 8 This is a schematic diagram of the drive assembly structure when the knob is pulled out;

[0031] In the figure: 1, shell, 1-1, front shell, 1-2, rear shell, 1-3, protruding track, 2, slide rail, 2-1, upper slide rail, 2-2, lower slide rail, 2-3, groove track, 2-4, rack, 3, baffle, 4, inner ratchet and outer gear structure, 4-1, gear, 4-2, ratchet teeth, 4-3, limit block, 5, upper baffle, 6, knob, 7, stop claw, 8, rotating shaft, 8-1, first baffle, 8-2, second baffle, 8-3, second fixed block, 8-4, third fixed block, 9, main disk body, 9-1, first fixed block, 9-2, cylindrical shaft, 10, limit retaining spring. Specific implementation plan

[0032] The present invention will be better described below with reference to the accompanying drawings.

[0033] like Figure 1-4 As shown, a self-locking device of a hemostatic forceps is provided, in which an upper slide rail 2-1 and a lower slide rail 2-2 are slidably connected up and down in a shell 1 of the self-locking device, the slide rail 2 includes an upper slide rail 2-1 and a lower slide rail 2-2, the upper slide rail 2-1 and the lower slide rail 2-2 have the same structure, both are groove structures, the groove track 2-3 arranged on the outer side of the groove body of the upper slide rail 2-1 and the lower slide rail 2-2 is correspondingly connected with the protrusion track 1-3 arranged in the shell 1, the upper slide rail 2-1 and the lower slide rail 2-2 are internally provided with a rack 2-4, an inner ratchet outer gear structure 4 is meshed between the upper slide rail 2-1 and the lower slide rail 2-2, the rack 2-4 is matched and meshed with a gear 4-1 arranged on the outside of the inner ratchet outer gear structure 4, and a driving component is connected inside the inner ratchet outer gear structure 4.

[0034] like Figure 5As shown, the inner ratchet and outer gear structure 4 is a circular ring structure, one end of the inner wall is provided with a circle of ratchet teeth 4-2, the other end of the inner wall is provided with a limit block 4-3, the outer circle is provided with a gear 4-1, the gear 4-1 is meshed with the upper slide rail 2-1 and the lower slide rail 2-2, and the limit block 4-3 and the ratchet teeth 4-2 can be engaged with the drive assembly. That is, the self-locking device of the present invention realizes the meshing of the outer side with the slide rail 2 through the outer gear of the inner ratchet and outer gear structure 4, and realizes the function of automatic locking through the cooperation of the ratchet teeth 4-2 and the drive assembly.

[0035] like Figure 4 , 7 As shown in FIG. 8 , the driving assembly includes a main plate body 9, a rotating shaft 8, and a connecting assembly arranged on the rotating shaft 8. The rotating shaft 8 passes through the main plate body 9, and the rotating shaft 8 is gap-connected with the main plate body 9. That is, the rotation of the rotating shaft 8 does not drive the main plate body 9 to rotate. First, the first fixing block 9-1 of the main plate body 9 is clamped by the lower end surface of one side of the upper slide rail 2-1 and the upper end surface of the opposite side of the lower slide rail 2-2. Secondly, the rotating shaft 8 is fixedly engaged with the inner ratchet outer gear structure 4 through the upper baffle plate 5. When the rotating shaft 8 is rotated, the main plate body 9 will not be driven to rotate.

[0036] The main plate body 9 is placed inside the inner ratchet outer gear structure 4, and the diameter of the main plate body 9 is smaller than the diameter of the inner ratchet outer gear structure 4; a first fixing block 9-1 is arranged on one end face of the main plate body 9, and a limit clamping spring 10 and a cylindrical shaft 9-2 are arranged on the other end face, and the first fixing block 9-1 is clamped between the upper slide rail 2-1 and the lower slide rail 2-2. Specifically, the lower edge of the upper slide rail 2-1 and the upper edge of the lower slide rail 2-2 clamp the first fixing block 9-1, which can limit the rotation of the main plate body 9, and the main plate body 9 can also be fixed in the housing 1 by bolts to limit the rotation and movement of the main plate body 9. A stop claw 7 is sleeved on the cylindrical shaft 9-2, such as Figure 6 As shown, the length D of the stop pawl 7 is greater than the vertical distance d from the cylindrical shaft 9-2 to the ratchet tooth 4-2, and the limit spring 10 can contact or disengage with the stop pawl 7, and the limit spring 10 limits the stop pawl 7 from rotating in the direction of the knob 6. The normal state of the limit spring 10 is that it just contacts the stop pawl 7 and is inserted into the ratchet tooth 4-2. When the rotation of the ratchet tooth 4-2 drives the stop pawl 7 to rotate, the stop pawl 7 contacts the spring of the limit spring 10 to generate displacement. When the ratchet tooth 4-2 stops rotating, the limit spring 10 is reset.

[0037] When the knob 6 is turned, the ratchet teeth 4-2 are driven to rotate, and the stop pawl 7 is driven by the ratchet teeth 4-2 to rotate along with the rotation of the ratchet teeth 4-2. In order to prevent the stop pawl 7 from deviating too much from the ratchet teeth 4-2, a limit spring 10 is provided to contact the stop pawl 7. When the knob 6 is not turned and locked, since the length D of the stop pawl 7 is greater than the vertical distance d from the cylindrical shaft 9-2 to the ratchet teeth 4-2, when the ratchet teeth 4-2 rotate slightly, the stop pawl 7 is just stuck in the ratchet teeth 4-2, forming a locked state. When the knob 6 is pulled out, the stop pawl 7 is held between the first baffle 8-1 and the second baffle 8-2 and only moves up and down. When the knob 6 is inserted again, the stop pawl 7 can be just stuck in the ratchet teeth 4-2.

[0038] The connecting assembly arranged on the rotating shaft 8 is arranged from one end to the other end of the rotating shaft 8, that is, from the inner ratchet outer gear structure 4 to the knob 6, in sequence, as follows: a first baffle 8-1, a second baffle 8-2 with a groove, a second fixing block 8-3 and a third fixing block 8-4. The first baffle 8-1, the second baffle 8-2, the second fixing block 8-3 and the third fixing block 8-4 are all fixed on the rotating shaft 8. A stop claw 7 is sandwiched between the first baffle 8-1 and the second baffle 8-2. The first baffle 8-1, the second baffle 8-2 and the stop claw 7 are connected. There is a slight gap, that is, the first baffle 8-1 and the second baffle 8-2 can only drive the locking claw 7 to move axially along the cylindrical shaft 9-2, and do not limit the rotation of the locking claw 7. The second fixed block 8-3 can clamp the upper baffle 5, and the third fixed block 8-4 clamps the knob 6. The outer contour of the upper baffle 5 matches the structure formed by the limit block 4-3 of the inner ratchet and outer gear structure 4. The upper baffle 5 is fixedly connected to the limit block 4-3 of the inner ratchet and outer gear structure 4. When the knob 6 rotates, the inner ratchet and outer gear structure 4 can be driven to rotate coaxially through the upper baffle 5.

[0039] The radius of the first baffle 8-1 and the second baffle 8-2 with a groove is smaller than the distance from the center of the rotating shaft 8 to the cylindrical shaft 9-2, that is, the first baffle 8-1 and the second baffle 8-2 clamp the edge of the stop claw 7, which does not affect the stop claw 7 being sleeved on the cylindrical shaft 9-2, but can drive the stop claw 7 to move up and down along the cylindrical shaft 9-2.

[0040] A hanging plate 3 is provided at the end of the upper slide rail 2-1 and the lower slide rail 2-2 facing away from the shell 1. The hanging plate 3 is fixedly connected to the upper slide rail 2-1 and the lower slide rail 2-2 by bolts or welding. In this embodiment, the hanging plate 3 is fixedly connected to the upper slide rail 2-1 and the lower slide rail 2-2 by bolts. The bolt connection can be quickly installed and replaced. The two hanging plates 3 are respectively hung on the two rings, i.e., the handles, of the hemostatic forceps.

[0041] One end of the hanging plate 3 in contact with the ring is set as a straight plate or a C-shaped groove body, and the straight plate or C-shaped groove body is hooked on the ring mouth. When the hand or the knob 6 drives the upper slide rail 2-1 and the lower slide rail 2-2 to move, the hanging plate 3 can drive the two ring mouths of the hemostatic forceps to move toward or away from each other. This embodiment takes the straight plate as an example. If it is a C-shaped groove body, the opening directions of the two hanging plates 3, that is, the C-shaped groove body, are set relative to each other. The hanging plate 3 can realize the self-locking function of the hemostatic forceps of any size, realizing the compatibility of the equipment.

[0042] The first fixed block 9-1, the second fixed block 8-3 and the third fixed block 8-4 are square or any polygon. They are used to limit the moving direction. The first fixed block 9-1 is used to clamp the main disk body 9 so that the rotating shaft 8 can rotate relative to the main disk body 9; the second fixed block 8-3 is used to be fixedly connected with the upper baffle 5, and can limit the fixed direction of the knob 6 to be pulled out and inserted. Positioning strips can also be marked on the second fixed block 8-3 and the knob 6 to limit the vertical pulling out and insertion of the knob 6, so as to ensure that the stop claw 7 is inserted into the ratchet tooth 4-2; the third fixed block 8-4 is used to be fixedly connected with the knob 6. In this embodiment, the first fixed block 9-1, the second fixed block 8-3 and the third fixed block 8-4 are all square. The square structure is simple to manufacture and has low cost, and the clamping effect is optimal.

[0043] The edges, corners and edges of the housing 1, the upper slide rail 2-1, the lower slide rail 2-2 and the knob 6 are all provided with rounded protection structures to ensure the safety of the operator.

[0044] The housing 1 is composed of a front housing 1-1 and a rear housing 1-2, and the front housing 1-1 and the rear housing 1-2 are snap-fitted or connected by bolts.

[0045] The material of the housing 1, the protruding track 1-3, the slide rail 2, the upper slide rail 2-1, the lower slide rail 2-2, the groove track 2-3, the rack 2-4, the inner ratchet and outer gear structure 4, the gear 4-1, the ratchet tooth 4-2, the limit block 4-3, the upper baffle 5, the stop pawl 7, the rotating shaft 8, the first baffle 8-1, the second baffle 8-2, the second fixed block 8-3, the third fixed block 8-4, the main plate body 9, the first fixed block 9-1, and the cylindrical shaft 9-2 is 3042B stainless steel. 3042B stainless steel has good corrosion resistance, heat resistance, and mechanical properties. It will not harden after heat treatment and can resist organic compounds and a wide variety of inorganic compounds.

[0046] Assembly method:

[0047] The limit spring 10 of the self-locking device is positioned on the main disk body 9 by screws, and the locking claw 7 is inserted into the groove of the second baffle 8-2 on the rotating shaft 8 and vertically inserted into the cylindrical shaft 9-2 on the main disk body 9. The cylindrical shaft on the side of the main disk body 9 can play the function of positioning the locking claw 7, and then the inner ratchet and outer gear structure 4 is coaxially placed on the outside of the main disk body 9, and the upper baffle plate 5 is interference fit to clamp the inner ratchet and outer gear structure 4, and transitionally connected to the rotating shaft 8, the upper slide rail 2-1 and the lower slide rail 2-2 are respectively meshed on the upper and lower sides of the inner ratchet and outer gear structure 4 through gears, and then the front shell 1-1 and the rear shell 1-2 are respectively connected through the groove rails 2-3 on the slide rails 2, and the front shell 1-1 and the rear shell 1-2 are buckled by buckles or bolts, and the knob 6 is clamped on the rotating shaft 8 through interference fit, and finally the two baffle plates 3 are respectively connected to the upper slide rail 2-1 and the lower slide rail 2-2 by threads.

[0048] How to do it:

[0049] During the operation, first, place the baffle plate 3 at the ring mouth of the hemostat, that is, the hand-held position, and then rotate the knob 6, which drives the rotating shaft 8 to rotate, and the second fixed block 8-3 on the rotating shaft 8 is engaged with the upper baffle plate 5, thereby driving the inner ratchet outer gear structure 4 to rotate. The rotation of the inner ratchet outer gear structure 4 drives the upper slide rail 2-1 and the lower slide rail 2-2 to move toward each other, that is, drives the hemostat to gradually clamp until it reaches the position expected by the user, and then releases the hand. At this time, the stop claw 7 clamps the internal ratchet teeth 4-2 of the inner ratchet outer gear structure 4, and the state of the stop claw 7 and the limit spring 10 is as shown in FIG. Figure 7 As shown, the hemostatic forceps are automatically locked and the bone is temporarily fixed. The doctor can complete the temporary fixation of the bone within 3 seconds; the positioning is more accurate and it is not easy to move or loosen during the operation.

[0050] After use, the user can open the self-locking structure by pulling out the knob 6 perpendicularly to the surface of the shell 1. The knob 6 drives the rotating shaft 8 to be pulled out in a direction perpendicular to the shell 1. At this time, the second fixing block 8-3 is disengaged from the upper baffle 5, and the second baffle 8-2 with a groove contacts the upper baffle 5 to limit the distance the knob 6 is pulled out. The first baffle 8-1 and the second baffle 8-2 clamp the stop pawl 7 to disengage from the ratchet teeth 4-2 in the inner ratchet outer gear structure 4. The state of the stop pawl 7 and the limit clamping spring 10 is as shown in FIG. Figure 8 As shown, the self-locking structure is opened, and before the next use, the upper slide rail 2-1 and the lower slide rail 2-2 are moved to the starting position, and the knob 6 is pressed inward perpendicularly to the surface of the housing 1, and then the use can continue.

[0051] The device is used in conjunction with hemostatic forceps, that is, the device can be used in any field where hemostatic forceps are used. At the same time, the device is not limited to being used in conjunction with hemostatic forceps, and other devices and tools that require a self-locking structure can be used in conjunction with the device.

Claims

1. A self-locking device for hemostatic forceps, characterized in that: An upper slide rail (2-1) and a lower slide rail (2-2) are slidably connected up and down within a housing (1) of the self-locking device; an inner ratchet and outer gear structure (4) is meshed between the upper slide rail (2-1) and the lower slide rail (2-2); and a driving component is connected within the inner ratchet and outer gear structure (4); The inner ratchet and outer gear structure (4) is a circular ring structure, one end of the inner wall of which is provided with a circle of ratchet teeth (4-2), the other end of the inner wall of which is provided with a limit block (4-3), the outer circle of which is provided with a gear (4-1), the gear (4-1) meshing with the upper slide rail (2-1) and the lower slide rail (2-2), the limit block (4-3) and the ratchet teeth (4-2) can be engaged with or disengaged from the drive assembly; The driving assembly comprises a main disk body (9), a rotating shaft (8), and a connecting assembly arranged on the rotating shaft (8); the rotating shaft (8) passes through the main disk body (9), and the rotating shaft (8) is gap-connected to the main disk body (9).

2. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: A first fixing block (9-1) is arranged on one end surface of the main disk body (9), and a limiting clamping spring (10) and a cylindrical shaft (9-2) are arranged on the other end surface. The first fixing block (9-1) is clamped between the upper slide rail (2-1) and the lower slide rail (2-2). A stop claw (7) is sleeved on the cylindrical shaft (9-2). The length (D) of the stop claw (7) is greater than the vertical distance (d) from the cylindrical shaft (9-2) to the ratchet tooth (4-2). The limiting clamping spring (10) can contact or disengage from the stop claw (7).

3. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: The connecting assembly is fixedly arranged from one end of the rotating shaft (8) to the other end in sequence as a first baffle (8-1), a second baffle (8-2) with a groove, a second fixing block (8-3) and a third fixing block (8-4); a stop claw (7) is clamped between the first baffle (8-1) and the second baffle (8-2); the second fixing block (8-3) can be clamped with an upper baffle (5); the third fixing block (8-4) is fixedly clamped with a knob (6); and the upper baffle (5) is fixedly connected to a limit block (4-3) of the inner ratchet and outer gear structure (4).

4. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: Hanging plates (3) are provided at the ends of the upper slide rail (2-1) and the lower slide rail (2-2) facing away from the housing (1), and the two hanging plates (3) are respectively hung on the two ring openings of the hemostatic forceps.

5. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: One end of the hanging plate (3) in contact with the ring opening is configured as a straight plate or a C-shaped groove.

6. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: The first fixing block (9-1), the second fixing block (8-3) and the third fixing block (8-4) are squares or arbitrary polygons.

7. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: The edges, corners and edges of the housing (1), the upper slide rail (2-1), the lower slide rail (2-2) and the knob (6) are all provided with rounded corner protection structures.

8. The self-locking device of the hemostatic forceps according to claim 1, characterized in that: The housing (1) consists of a front housing (1-1) and a rear housing (1-2), and the front housing (1-1) and the rear housing (1-2) are snap-fitted or connected via bolts.

Images