Medical multi-gear torsion screwdriver

Abstract

Aiming at the problems that gears cannot be adjusted and operation is inconvenient in the prior art, the medical multi-gear torsion screwdriver comprises a screwdriver rod, a handle and an adjusting assembly, the first end of the screwdriver rod is connected with the adjusting assembly, the second end of the screwdriver rod extends out of the handle, a spring is arranged between the adjusting assembly and the handle, and the adjusting assembly is connected with the handle. The handle and the adjusting assembly are movably connected through the boss and the limiting grooves, the multiple limiting grooves are communicated with one another, the compression strength of the spring is changed by adjusting the position of the boss in the limiting grooves, and then the torsion of the cutter bar is adjusted. The boss is movably connected with the limiting groove, the compression strength of the spring is adjusted, then the torsion of the cutter bar is adjusted, compared with the prior art, gear adjustment can be achieved, operation is convenient, adjustment can be achieved without too many complex structures, cost is reasonable, a doctor can easily and rapidly adjust the torsion in the operation process, and the operation efficiency is improved. Therefore, the requirements of different operation scenes are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field, especially relate to a medical multi -position torsion screwdriver. BACKGROUND

[0002] In the field of medical surgery, especially in the surgery with high precision requirements, the precision and reliability of surgical instruments are highly required. As a common tool in the surgical process, the performance of screwdriver directly affects the quality and safety of surgery.

[0003] The patent application with publication number CN107049466A discloses a screwdriver for orthopedic surgery. The screwdriver for orthopedic surgery comprises a driving wheel, a handle, a rod and a head connected in sequence, the driving wheel is arranged on the rod and a fixing device for clamping a screw; the fixing device comprises a rotating rod arranged in parallel and spaced apart from the rod, a sleeve arranged at one end of the rod and pivotally connected with the rotating rod at the other end, a driven wheel arranged on the rotating rod and engaged with the driving wheel, a synchronous wheel arranged on the rotating rod, a first clamping device and a second clamping device arranged oppositely, a moving device arranged between the first clamping device and the second clamping device, and a fixing plate arranged between the first clamping device and the second clamping device and allowing the first clamping device and the second clamping device to rotate. Compared with the related art, the screwdriver for orthopedic surgery provided by the patent application is convenient to operate, avoids secondary injury to patients, improves surgical efficiency and shortens the operation time.

[0004] The patent application with publication number CN1320412A discloses a medical double insurance screwdriver, which belongs to orthopedic surgical instruments. The medical double insurance screwdriver is composed of a main screwdriver 28, a pressure device and a fixing device. The main screwdriver 28 is composed of a screwdriver head 1, a screwdriver body 2 and a screwdriver handle 6; the pressure device is composed of a cylindrical pressure device cylinder 29 and a pressure device spring 19; and the fixing device is composed of a fixing device inner cylinder 30, a fixing device outer cylinder 31, a fixing device spring 18, a fixing device snap spring 20 and a lock. The fixing device and the pressure device are sequentially sleeved on the screwdriver body of the main screwdriver, and the fixing device and the pressure device are connected together through threads. The fixing device can simply and elastically fix the screw, and the pressure device can fix the screw more firmly. When the screw is screwed to the tail, the screw can automatically fall off and be tightened, and the screw can also be used to take out the screw. The screwdriver is convenient to use, saves time and is suitable for use in hospitals.

[0005] The medical screwdriver disclosed in the above patent publication application usually does not have precise torque control function, and doctors cannot accurately judge and control the size of the applied torque when using it. This may cause damage to medical equipment or implants when tightening the screw due to excessive torque, and may even cause unnecessary damage to the patient's tissue.

[0006] To solve the above problems, some screwdrivers with torque control function appear in the market. However, these products mostly have problems such as low precision and high cost. For example, although some screwdrivers claim to have a fixed torque function, their actual torque control range is relatively wide, which cannot meet the strict requirements of the medical field for accurate torque, making it difficult for doctors to quickly and accurately operate during surgery. In addition, the adjustment of the fixed torque screwdriver during the operation process is relatively cumbersome, often requiring the interruption of the operation process and the replacement of screwdrivers with different torque settings, which not only prolongs the operation time and increases the risk of patients, but also affects the continuity and smoothness of the operation. Utility model content

[0007] In view of the problems existing in the prior art, the utility model provides a medical multi-gear torque screwdriver which has torque gear adjustment, is convenient to operate and has reasonable cost, and can be easily and quickly adjusted by doctors during the operation process to meet the needs of different operation scenes.

[0008] The utility model adopts the technical scheme as follows: a medical multi-gear torque screwdriver, including the handle and adjustment assembly, the first end of the sword rod is connected with the adjustment assembly, the second end stretches out from the handle, the spring is equipped between the adjustment assembly and the handle, the handle and the adjustment assembly are connected through the boss and the limit groove, the limit groove has a plurality of and is communicated with each other, the position of the boss in the limit groove is adjusted, the spring compression intensity is changed, and then the torque of the sword rod is adjusted.

[0009] In the application, the adjustment of the spring compression intensity is realized through the movable connection of the boss and the limit groove, and then the torque of the sword rod is adjusted. Compared with the prior art, the application can realize gear adjustment and is convenient to operate without too many complex structures, has reasonable cost, and can be easily and quickly adjusted by doctors during the operation process to meet the needs of different operation scenes.

[0010] As an improvement, the limit groove is located on the handle, the limit groove is arranged axially along the handle, the adjustment assembly includes an inner ratchet wheel and an outer ratchet wheel connected with each other, the inner ratchet wheel is provided with a groove, the first end of the sword rod is arranged in the groove, the outer ratchet wheel is provided with a push button, the push button protrudes from the handle, one end of the push button is provided with the boss, and the boss is limited in the limit groove from outside to inside. In this arrangement, the limit groove is arranged on the handle, the boss is arranged on the outer ratchet wheel, and the boss is limited in the limit groove from outside to inside, which ensures the stability of the structure.

[0011] Further, the end of the handle is provided with a bottom cover, and the bottom cover seals the end of the handle. The bottom cover plays a sealing role to prevent the adjustment assembly located in the handle from falling out.

[0012] As a second improvement, the adjustment assembly comprises an inner ratchet wheel, an outer ratchet wheel and a bottom cover, the inner ratchet wheel and the outer ratchet wheel are connected, the inner ratchet wheel is provided with a groove, the first end of the knife rod is arranged in the groove, the bottom cover is connected with the handle, the limiting groove is arranged on the bottom cover, and the bosses are arranged on the handle in an axial direction.

[0013] As a third improvement, the adjustment assembly comprises an inner ratchet wheel, an outer ratchet wheel and a bottom cover connected, the inner ratchet wheel is provided with a groove, the first end of the knife rod is arranged in the groove, the inner ratchet wheel and the outer ratchet wheel are arranged in the handle, the limiting groove is arranged on the handle in an axial direction, the bottom cover is threadedly connected with the handle, and the bosses are arranged on the bottom cover.

[0014] Further, the bottom cover is provided with a surrounding edge, the surrounding edge surrounds the outside of the handle, and the bosses are arranged at the end of the surrounding edge.

[0015] Further, the bottom cover is connected with the outer ratchet wheel, and the bosses are arranged close to the outer ratchet wheel.

[0016] Further, the end faces of the inner ratchet wheel and the outer ratchet wheel are engaged. In surgery, a smaller torque is used, and accurate torque control is required. The non-tooth surface engagement mode is difficult to achieve approximate effect. Therefore, in terms of control accuracy and reliability, the inner and outer ratchet end face wheels are a relatively superior choice, and the structure is relatively simple.

[0017] Further, the knife rod has a cross-shaped, a single-shaped or a hexagonal knife head.

[0018] The utility model has the beneficial effect that the application is a medical multi-gear torque screwdriver, which realizes the adjustment of spring compression strength through the movable connection of bosses and limiting grooves, and then adjusts the torque of the knife rod. Compared with the prior art, the application can realize gear adjustment and is convenient to operate without too many complex structures, and the cost is reasonable. It is convenient for doctors to easily and quickly adjust the torque during surgery to meet the needs of different surgical scenes. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of embodiment 1.

[0020] Figure 2 It is a schematic diagram of the assembly structure of embodiment 1.

[0021] Figure 3 It is a schematic diagram of the inner ratchet wheel structure of embodiment 1.

[0022] Figure 4 It is a schematic diagram of the outer ratchet wheel structure of embodiment 1.

[0023] Figure 5 This is a schematic diagram of the handle structure in Example 1;

[0024] Figure 6 This is a schematic diagram of the internal structure of Example 1;

[0025] Figure 7 This is a schematic diagram of the internal structure of Example 2;

[0026] Figure 8 This is a schematic diagram of the handle structure in Example 2;

[0027] Figure 9 This is a schematic diagram of the bottom cover structure of Example 2.

[0028] Figure 10 This is a schematic diagram of the internal structure of Example 3;

[0029] Figure 11 This is a schematic diagram of the overall structure of Example 3;

[0030] Figure 12 This is a schematic diagram of the internal structure of Example 4;

[0031] In the diagram: 1 is the tool holder; 2 is the handle; 2-1 is the first limiting groove; 2-2 is the second limiting groove; 2-3 is the third limiting groove; 3 is the spring; 4 is the inner ratchet; 4-1 is the first ratchet tooth; 5 is the outer ratchet; 5-1 is the second ratchet tooth; 5-2 is the push button; 6 is the bottom cover; 7 is the boss. Detailed Implementation

[0032] The technical solutions of the embodiments of this utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this utility model.

[0033] Example 1

[0034] like Figures 1 to 6 As shown, this embodiment is a medical multi-position torque screwdriver, including a screwdriver 1, a handle 2, and an adjustment assembly. The first end of the screwdriver 1 is connected to the adjustment assembly, and the second end extends from the handle 2. A spring 3 is provided between the adjustment assembly and the handle 2. The handle 2 and the adjustment assembly are movably connected by a boss 7 and a limiting groove. There are multiple limiting grooves that are interconnected. By adjusting the position of the boss 7 in the limiting groove, the compression strength of the spring 3 is changed, thereby adjusting the torque of the screwdriver 1.

[0035] In the present application, the convex boss 7 and the limiting groove are used for movable connection, the compression strength of the spring 3 is adjusted, and then the torsion of the knife lever 1 is adjusted. Compared with the prior art, the present application can realize gear adjustment and is convenient to operate, does not need too many complex structures, is reasonable in cost, and is convenient for doctors to easily and quickly adjust the torsion during the operation process, so as to meet the needs of different operation scenes.

[0036] The limiting groove is located on the handle 2, and is arranged in the axial direction of the handle 2. The adjusting assembly comprises an inner ratchet wheel 4 and an outer ratchet wheel 5 connected with each other. The inner ratchet wheel 4 is provided with a groove, and the first end of the knife lever 1 is arranged in the groove. The outer ratchet wheel 5 is provided with a push button 5-2, the push button 5-2 protrudes from the handle 2, one end of the push button 5-2 is provided with the convex boss 7, and the convex boss 7 is limited in the limiting groove from the outside to the inside. In this arrangement, the limiting groove is arranged on the handle 2, the convex boss 7 is arranged on the outer ratchet wheel 5, and the convex boss 7 is limited in the limiting groove from the outside to the inside, so that the structure is stable.

[0037] As shown in Figure 5 , the limiting groove of the present application is provided with three limiting grooves, namely a first limiting groove 2-1, a second limiting groove 2-2 and a third limiting groove 2-3. As can be seen from the figure, the three limiting grooves are arranged in the axial direction of the handle 2 and are communicated with each other. Figure 6 (a) in the figure is a structural schematic view of the convex boss 7 arranged in the first limiting groove 2-1. The outer ratchet wheel 5 is located at the first limiting groove 2-1 of the handle 2. The compression deformation amount of the spring 3 is small, the torsion transmitted by the spring 3 to the inner ratchet wheel 4 and the outer ratchet wheel 5 is small, and the torsion limit value of the medical adjustable torsion screwdriver is small at this time. Figure 6 In the state of (a), the tail end of the push button 5-2 is pressed and pushed to make the push button 5-2 located at the second limiting groove 2-2 of the handle 2, that is, as shown in Figure 6 (b) in the figure is a structural schematic view of the convex boss 7 arranged in the second limiting groove 2-2. The compression deformation amount of the spring 3 is slightly larger than that of (a), the torsion transmitted by the spring 3 to the inner ratchet wheel 4 and the outer ratchet wheel 5 is larger than that of (a), the torsion limit value of the medical adjustable torsion screwdriver is larger than that of (a), and so on. Figure 6 Figure 6 The torsion limit value of the medical adjustable torsion screwdriver is increased, and the relative position of the handle 2 limiting groove and the outer ratchet wheel 5 can be adjusted in this way, so that the gear position with a suitable torsion is obtained.

[0038] The end of the handle 2 is provided with a bottom cover 6, and the bottom cover 6 seals the end of the handle 2. The bottom cover 6 plays a sealing role to prevent the adjusting assembly located in the handle 2 from falling out.

[0039] The end surface of the inner ratchet wheel 4 is provided with a first ratchet tooth 4-1, the end surface of the outer ratchet wheel 5 is provided with a second ratchet tooth 5-1, the first ratchet tooth 4-1 is matched with the second ratchet tooth 5-1, and the end surfaces of the inner ratchet wheel 4 and the outer ratchet wheel 5 are meshed. ​

[0040] The tool bar 1 has a cross-shaped, a one-shaped or a hexagonal tool head. This arrangement makes the tool bar 1 have a wide range of applications.

[0041] Embodiment 2

[0042] As shown in Figure 7 , Figure 8 , Figure 9 The difference between this embodiment and embodiment 1 is that the adjusting assembly comprises an inner ratchet wheel 4, an outer ratchet wheel 5 and a bottom cover 6 connected together, the inner ratchet wheel 4 is provided with a groove, the first end of the tool bar 1 is arranged in the groove, the inner ratchet wheel 4 and the outer ratchet wheel 5 are arranged in the handle 2, the limiting grooves are arranged on the handle 2 and axially arranged along the handle 2, the bottom cover 6 is threadedly connected with the handle 2, and the boss 7 is arranged on the bottom cover 6. Among them, the outer thread is arranged on the bottom cover 6, the inner thread is arranged on the handle 2, the bottom cover 6 is connected with the outer ratchet wheel 5, the boss 7 is arranged close to the outer ratchet wheel 5, and the boss 7 is arranged in the limiting groove from inside to outside. As shown in Figure 7 , Figure 7 (a) in the structure diagram of the boss 7 arranged in the first limiting groove 2-1, Figure 7 (b) in the structure diagram of the boss 7 arranged in the second limiting groove 2-2. As shown in Figure 8 , it can be seen that the positions of the three limiting grooves; As shown in Figure 9 In this embodiment, the two sides of the boss 7 are provided with recesses, which makes the side wall of the bottom cover 6 where the boss 7 is located have elasticity, provides the boss 7 with outward extrusion elastic force, and facilitates the axial movement of the bottom cover 6 and the adjustment of the position of the tool bar 1.

[0043] Embodiment 3

[0044] As shown in Figure 10 and Figure 11 The difference between this embodiment and embodiment 2 is that the bottom cover 6 is provided with a surrounding edge, the surrounding edge surrounds the outside of the handle 2, the boss 7 is arranged at the end of the surrounding edge, and the boss 7 is arranged in the limiting groove from outside to inside. Among them, the bottom cover 6 is provided with a containing cavity, which can contain the end of the handle 2, so as to prevent the bottom cover 6 from shaking when moving. Figure 10 (a) in the structure diagram of the boss 7 arranged in the first limiting groove 2-1, Figure 10 (b) in the structure diagram of the boss 7 arranged in the second limiting groove 2-2. As shown in Figure 11 , it can be seen that the boss 7 is arranged from outside to inside.

[0045] Embodiment 4

[0046] As shown in Figure 12As shown, the difference between the embodiment and the embodiment 1 is that the adjusting assembly comprises an inner ratchet wheel 4, an outer ratchet wheel 5 and a bottom cover 6, the inner ratchet wheel 4 and the outer ratchet wheel 5 are connected, the inner ratchet wheel 4 is provided with a recess, the first end of the cutter bar 1 is arranged in the recess, the bottom cover 6 is connected with the handle 2, the limiting grooves are arranged on the bottom cover 6, the bosses 7 are arranged on the handle 2, the bosses 7 are provided with a plurality of bosses and are arranged along the axial direction of the handle 2.

[0047] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, and those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific embodiment. Any modification without deviating from the function and structural principle of the present application will be included in the scope of the claims.

Claims

1. A medical multi-position torque screwdriver, characterized by, The utility model provides a knife rod, handle and adjustment assembly, the first end of the knife rod is connected with the adjustment assembly, the second end is from the handle, the spring is arranged between the adjustment assembly and the handle, the handle and the adjustment assembly are connected through the boss and the limiting groove, the limiting groove has multiple and communicates with each other, the position of the boss in the limiting groove is adjusted, the compression strength of the spring is changed, and then the torsion of the knife rod is adjusted.

2. The medical multi-position torque screwdriver according to claim 1, characterized in that The limiting groove is arranged on the handle and axially along the handle, the adjustment assembly comprises an inner ratchet wheel and an outer ratchet wheel connected with each other, the inner ratchet wheel is provided with a recess, the first end of the knife rod is arranged in the recess, the outer ratchet wheel is provided with a push button, the push button protrudes from the handle, one end of the push button is provided with the boss, and the boss is limited in the limiting groove from outside to inside.

3. The medical multi-position torque screwdriver according to claim 2, wherein The end of the handle is provided with a bottom cover, and the bottom cover seals the end of the handle.

4. The medical multi-position torque screwdriver according to claim 1, wherein The adjustment assembly comprises an inner ratchet wheel, an outer ratchet wheel and a bottom cover, the inner ratchet wheel and the outer ratchet wheel are connected, the inner ratchet wheel is provided with a recess, the first end of the knife rod is arranged in the recess, the bottom cover is connected with the handle, the limiting groove is arranged on the bottom cover, and the boss is arranged on the handle.

5. The medical multi-position torque screwdriver according to claim 1, wherein, The adjustment assembly comprises an inner ratchet wheel, an outer ratchet wheel and a bottom cover, the inner ratchet wheel and the outer ratchet wheel are connected, the inner ratchet wheel is provided with a recess, the first end of the knife rod is arranged in the recess, the inner ratchet wheel and the outer ratchet wheel are arranged in the handle, the limiting groove is arranged on the handle and axially along the handle, the bottom cover is threadedly connected with the handle, and the boss is arranged on the bottom cover.

6. The medical multi-position torque screwdriver according to claim 5, wherein, The bottom cover is provided with a surrounding edge, the surrounding edge surrounds the outside of the handle, the boss is arranged at the end of the surrounding edge, and the boss is arranged in the limiting groove from outside to inside.

7. The medical multi-position torque screwdriver according to claim 5, wherein The bottom cover is connected with the outer ratchet wheel, the boss is arranged close to the outer ratchet wheel, and the boss is arranged in the limiting groove from inside to outside.

8. The medical multi-position torque screwdriver according to claim 2, wherein, The end faces of the inner ratchet wheel and the outer ratchet wheel are engaged.

9. The medical multi-position torque screwdriver according to claim 1, wherein, The knife rod has a cross-shaped, a straight-shaped or a hexagonal knife head.

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