Integrated connector with torque wrench for ultrasonic hemostasis knife

Abstract

The integrated connector comprises a shell and an inner core, the inner core is sleeved with the shell and rotationally connected with the shell, the inner core is provided with a gear ring, the gear ring is composed of a large gear ring body and a small gear ring body, the large gear ring body is composed of a plurality of ratchets, the ratchets are annularly distributed and evenly spaced, and the small gear ring body is connected with the shell. The small gear ring is composed of a plurality of sets of teeth, a set of teeth is arranged between every two ratchets, the distance between any two adjacent teeth in each set of teeth is the same, the shell is provided with a pawl matched with the gear ring, the pawl is elastically arranged, and the inner core is provided with an annular groove and a matching hole. According to the integrated connector provided with the torque wrench and used for the ultrasonic hemostasis knife, through cooperation of the large gear ring, the small gear ring and the pawl, the connector can control the torque through a simple structure, the torque control function is set on the integrated connector, meanwhile, the structure of the integrated connector is simplified, and the cost is reduced. The cost and the operation difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical devices, and relates to the composition accessory of ultrasonic hemostatic knife, especially to an integrated connector with torque wrench for ultrasonic hemostatic knife. BACKGROUND

[0002] The ultrasonic hemostatic knife system (also called ultrasonic surgical knife) is a surgical instrument for cutting and separating biological bodies through high-speed vibration. The ultrasonic hemostatic knife system comprises three main components: an ultrasonic excitation power supply (main generator), a driving handle (containing an ultrasonic transducer) and an ultrasonic hemostatic knife (instrument). The main function of the ultrasonic excitation power supply is to generate high-frequency and controllable electric power, and the electric power can be adjusted according to the coagulation speed and cutting speed during the tissue cutting process. The function of the driving handle is to convert high-frequency electric energy into ultrasonic mechanical (vibration) energy. Usually, a sandwich piezoelectric transducer is used to realize the conversion of electric energy into mechanical energy.

[0003] The ultrasonic hemostatic knife comprises a handle and a knife head, the knife head is rotationally connected with the handle through a connecting piece, the knife head and the driving handle are fixedly connected through threads, the installation or dismounting of the knife body and the driving handle is realized, when the knife head and the driving handle are connected, the torque cannot be too large or too small, too large torque will cause damage to the threads, too small torque will cause unreliable connection, poor vibration transmission and easy loosening of the knife head and the driving handle during use.

[0004] In order to control the torque, one way is to provide a special torque wrench, and the disadvantage of this way is that the torque wrench needs to be stored additionally, and if it is lost during use, it will cause trouble to the dismounting of the driving handle; another way is shown in the invention patent CN104173093B, a connector with torque control function is arranged, and the connector structure is complex. SUMMARY

[0005] The utility model aims at setting an integrated connector for the existing ultrasonic hemostatic knife, based on the demand for optimizing the structure of the integrated connector, and constructs an integrated connector with torque control function for the ultrasonic hemostatic knife.

[0006] An integrated connector with torque wrench for ultrasonic hemostatic knife, comprising a shell and an inner core, characterized in that the shell is sleeved on the inner core and rotationally connected with the shell, the inner core is provided with a gear ring, the gear ring is composed of a large gear ring and a small gear ring, the large gear ring is composed of a plurality of ratchets, the ratchets are annularly distributed and uniformly spaced, the small gear ring is composed of a plurality of groups of teeth, and each two ratchets are provided with a group of teeth,

[0007] The housing is provided with a pawl matching the gear ring, and the pawl is elastically arranged to meet the matching requirements of large and small gear rings with different sizes,

[0008] The inner core is further provided with an annular groove for rotationally connecting with the handle of the ultrasonic hemostatic knife and a matching hole for fixedly connecting with the head of the ultrasonic hemostatic knife.

[0009] Through the cooperation of the large gear ring, the small gear ring and the pawl, the torque size exactly meets the pre-tightening force requirement of the head and the driving handle during assembly, and also provides a force point for disassembling the head and the driving handle. The position of the pawl is limited by the small gear ring to avoid idling of the head during rotation in surgery.

[0010] Further, the direction of the head and the driving handle is positive, the direction of the ratchet (i.e. the direction of the root end of the ratchet pointing to the top end) is positive, the reverse end of the ratchet is provided with an arc surface for easy climbing, and the positive end of the ratchet is provided with a pressing surface for easy force.

[0011] Further, the end of the pawl is a combination of a plane and an arc surface, the plane of the pawl is located at the reverse end, and the arc surface of the pawl is located at the positive end.

[0012] Further, the groove between the two adjacent teeth matches the end of the pawl. When the head is rotated, the pawl can be clamped between any two adjacent teeth to avoid idling of the head during rotation in surgery.

[0013] Further, the teeth are provided in the form of ratchet teeth, and the direction of the teeth is positive.

[0014] Further, the force required for the pawl to cross the teeth is F1, the force required for the pawl to rotate positively to cross the ratchet teeth (the force required for the head and the driving handle to be assembled) is F2, the force required for the ultrasonic hemostatic knife to rotate the head is F3, and the force required for the head and the driving handle to be disassembled is F4,

[0015] F1>F3;

[0016] F2>F1;

[0017] F4≥F2.

[0018] Further, when the head and the driving handle are disassembled, the reverse end of the pawl abuts against the positive end of the ratchet teeth.

[0019] Further, the housing is provided with a plurality of push parts, the push parts are annularly distributed and uniformly spaced, and the distance between two push parts can accommodate a finger.

[0020] Further, the shell is provided with a notch, and the elastic member is integrated with the shell by the elasticity of the material, and the pawl is arranged on the elastic member.

[0021] The beneficial effects of the utility model lie in: the integrated connector with torque wrench for the ultrasonic hemostatic knife can cooperate with the large gear ring, the small gear ring and the pawl to make the torque size exactly meet the pre-tightening force requirement of the knife head and the driving handle assembly, and can also provide a stress point for the knife head and the driving handle disassembly and separation, and when the knife head is rotated, the pawl can be clamped between any two adjacent teeth to prevent the connector from idling, so that the connector controls the torque size with a simple structure, avoids problems such as thread deformation caused by excessive torque and unstable connection caused by small torque, and the like, and compared with the prior art, not only is the special torque wrench saved, but also the torque control function is arranged on the integrated connector, the structure of the integrated connector is simplified, the cost is reduced, and the operation difficulty of the operator is also reduced.

[0022] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, which can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings;

[0024] Figure 1 is the overall structure schematic view of a specific example of the integrated connector of the utility model;

[0025] Figure 2 is Figure 1 the front view of the utility model;

[0026] Figure 3 is the structure schematic view of the inner core in a specific example of the integrated connector of the utility model;

[0027] Figure 4 is the structure schematic view of the shell in a specific example of the integrated connector of the utility model;

[0028] Figure 5 is Figure 2 the cross-sectional structure schematic view of F-F in the utility model;

[0029] Figure 6 is Figure 5 is an enlarged view of the structure at A in the middle;

[0030] In the figure: 101, shell; 102, inner core; 103, ratchet; 104, two-stage stepped portion; 105, annular limiting piece; 106, one-stage stepped portion; 107, tooth; 108, fitting hole; 112, pawl; 113, connecting portion; 114, actuating portion; 119, elastic piece. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0032] The utility model of a one-piece connector with torque wrench for an ultrasonic hemostatic knife is further described in combination with the drawings.

[0033] As shown in Figure 1 and Figure 2 In the connector described in the embodiment, the shell 101 is sleeved on the inner core 102, and the shell 101 is rotationally connected with the inner core 102.

[0034] As shown in Figure 3 The inner core 102 is arranged in an annular stepped structure and comprises a one-stage stepped portion 106 and a two-stage stepped portion 104. The outer circumferential surface of the one-stage stepped portion 106 is provided with an annular limiting piece 105. The groove between the two-stage stepped portion 104 and the annular limiting piece 105 is an annular groove, which is used for rotationally connecting with the handle of the ultrasonic hemostatic knife. The one-stage stepped portion 106 is provided with two fitting holes 108. The line connecting the midpoints of the two fitting holes 108 is located on the center line of the cross section of the one-stage stepped portion 106. The fitting holes 108 are used for connecting with the tool bit of the ultrasonic hemostatic knife.

[0035] The two-stage stepped portion 104 is provided with a gear ring, which comprises a large gear ring and a small gear ring. The large gear ring is composed of four ratchets 103, which are annularly distributed and uniformly spaced. A group of teeth 107 is arranged between every two ratchets 103. There are four groups of teeth 107 in total, each group of teeth 107 is provided with six teeth 107, and the six teeth 107 are uniformly spaced. The four groups of teeth 107 constitute the small gear ring.

[0036] As shown in Figure 4As shown, the shell 101 is provided in a ring structure, and the center of the shell 101 coincides with the center of the inner core 102, the shell 101 is composed of the dialing part 114 and the connecting part 113, and the dialing part 114 is provided with six, which are evenly distributed in a ring shape, and each two can accommodate a finger.

[0037] The connecting part 113 is arranged between two dialing parts 114, and the connecting part 113 is an integral structure with the dialing part 114, the connecting part 113 is provided with an elastic element 119, and the connecting part 113 is provided with a notch, so that one side of the elastic element 119 is connected with the connecting part 113, and the elastic element 119 is an integral structure with the connecting part 113, and the inner side of the elastic element 119 is provided with a pawl 112, which is pushed and rebounded when rotating by the material elasticity.

[0038] As shown in Figure 5 and Figure 6 , the projection of the first step part 106 to the direction of the second step part 104 is the reference surface, the screwing direction of the shell 101 to make the tool bit cooperate with the driving handle is positive (counterclockwise direction), the positive end of the ratchet tooth 103 is provided as a plane, and the projection of the plane on the reference surface coincides with the center line, and the reverse end of the ratchet tooth 103 is provided as an arc surface for easy climbing.

[0039] The teeth 107 are also provided as ratchet teeth, and the climbing direction is the same as that of the ratchet tooth 103.

[0040] The pawl 112 is provided with two, and the two pawls 112 are located on the same center line.

[0041] The positive end of the pawl 112 is provided as an arc surface, the reverse end of the pawl 112 is provided as a right angle surface, and the recess between the two adjacent teeth 107 matches the shape of the end of the pawl 112.

[0042] The force required for the positive rotation of the pawl 112 across the tooth 107 is F1, the force required for the positive rotation of the pawl 112 across the ratchet tooth 103 is F2, the force required for the rotation of the ultrasonic hemostatic knife to make the tool bit is F3, the force required for the disassembly of the tool bit and the driving handle is F4, and the force required for the reverse rotation of the pawl 112 across the tooth 107 is F5, then:

[0043] F1>F3,

[0044] F2>F1,

[0045] F4≥F2,

[0046] F5>F3,

[0047] F1>F5。

[0048] When the tool bit and the driving handle need to be connected,

[0049] The operator holds the driving handle with one hand and rotates the shell 101 with the other hand, and when the pawl 112 rotates across the ratchet teeth 103 in the forward direction, the driving handle and the tool bit are assembled.

[0050] When the tool bit needs to be rotated during the operation,

[0051] The operator holds the handle and manually rotates the rotating part 114, so that the shell 101 rotates, and the inner core 102 rotates with the shell 101, and the tool bit connected with the inner core 102 also rotates.

[0052] When the tool bit and the driving handle need to be disassembled,

[0053] The operator holds the driving handle with one hand and rotates the shell 101 in the reverse direction with the other hand, and the pawl 112 will rotate in the reverse direction to the position where it abuts against the forward end of the ratchet teeth 103 and is stressed against it, so that the tool bit and the driving handle are separated and disassembled.

[0054] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An integrated connector with torque wrench for an ultrasonic hemostatic knife, comprising a housing and an inner core, characterized in that, The outer shell is sleeved on the inner core and rotationally connected with the outer shell, the inner core is provided with a gear ring, the gear ring is composed of a large gear ring and a small gear ring, the large gear ring is composed of a plurality of ratchet teeth, the ratchet teeth are annularly distributed and uniformly spaced, the small gear ring is composed of a plurality of groups of teeth, one group of teeth is arranged between every two ratchet teeth, and the distance between any two adjacent teeth in each group of teeth is the same, The outer shell is provided with a pawl matched with the gear ring, and the pawl is elastically arranged, The inner core is further provided with an annular groove for rotationally connecting with a handle of the ultrasonic hemostatic knife and a matching hole for fixedly connecting with a tool bit of the ultrasonic hemostatic knife.

2. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 1, characterized in that The screwing direction of the tool bit and the driving handle is positive, the direction of the ratchet teeth is positive, the reverse end of the ratchet teeth is provided with an arc surface facilitating climbing, and the positive end of the ratchet teeth is provided with a pressing surface facilitating force receiving.

3. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 2, wherein, The end of the pawl is a combination of a plane and an arc surface, the plane of the pawl is located at the reverse end, and the arc surface of the pawl is located at the positive end.

4. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 3, characterized in that The recess between the adjacent two teeth is matched with the end of the pawl.

5. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 4, characterized in that The teeth are provided in the form of ratchet teeth, and the direction of the teeth is positive.

6. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 1, wherein, The force required for the pawl to cross the teeth is F1, the force required for the pawl to rotationally cross the ratchet teeth is F2, the force required for the ultrasonic hemostatic knife to rotate the tool bit is F3, the force required for the tool bit and the driving handle to be detached is F4, F1>F3; F2>F1; F4>=F2.

7. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 3, wherein, When the tool bit and the driving handle are detached, the reverse end of the pawl is in abutment with the positive end of the ratchet teeth.

8. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 1, wherein, The outer shell is provided with a plurality of actuating portions, the actuating portions are annularly distributed and uniformly spaced, and the distance between two actuating portions can accommodate a finger.

9. The one-piece connector with torque wrench for an ultrasonic hemostasis knife according to claim 1, wherein, The outer shell is provided with a slot, and the outer shell is provided with an elastic member integrated therewith by utilizing the elasticity of the material, and the pawl is arranged on the elastic member.

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