Gripping mechanism and surgical instrument thereof

Abstract

Provided are a gripping mechanism and a surgical instrument thereof. The gripping mechanism comprises a handle (1), a trigger (2), a transmission mechanism (3), a locking mechanism (4), a connecting sleeve (5), a protective sheath (6), a surgical instrument (7), and a power cord (8). The transmission mechanism (3) comprises two structures, a cam structure and a gear structure. Both the trigger (2) and the transmission mechanism (3) are hinged to the handle (1) and can rotate inside the handle (1). The connecting sleeve (5) is arranged at a tail tube opening (16) of the connecting sleeve of the handle (1), and connects the protective sheath (6) and the handle (1). The frontmost end of the protective sheath (6) is provided with the surgical instrument (7). The gripping mode and the transmission mechanism are designed such that the clamping force is stable and the gripping force is required to be smaller and balanced during use. Moreover, the locking mechanism reduces the impact on the hand of medical staff due to prolonged gripping of the trigger during use, thereby offering better operational flexibility and use comfort, and also improving the accuracy of the surgical procedure.

Description

A holding mechanism and surgical instrument thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instruments, in particular to a holding mechanism and surgical instrument thereof. BACKGROUND

[0002] Electrocoagulation medical instruments are a kind of surgical medical instruments commonly used in surgery, which can instantly coagulate human tissues or wounds by high-frequency current, thereby achieving the function of rapid hemostasis; in the surgical process, if the surgical incision or channel is larger, the harm to the patient after the operation will be greater, so medical personnel strive to minimize the incision and make it minimally invasive during surgery, so the operation space of various operations is very limited.

[0003] In the surgical process corresponding to various narrow spaces, the traditional electrocoagulation forceps or electrocoagulation forceps and other surgical instruments are scissors-like opening and closing structures, such as the electrocoagulation forceps for endoscope disclosed in the publication No. CN117860370A, the holding structure part is similar to the handle structure of scissors, which is held and gripped by medical personnel, the fingers are inserted to perform opening and closing movement to realize the opening and closing work of the electrocoagulation forceps, the operation is not flexible enough, and even the holding may not be tight, which will reduce the accuracy of use in the long and tense surgical process, and may cause the medical personnel to shake or accidentally touch other normal tissues of the patient, causing secondary harm to the patient, and even serious medical accidents.

[0004] At present, the trigger opening and closing movement of the commonly used holding mechanism is mostly manually operated by medical personnel, and the holding stability of medical personnel will gradually decrease in the long surgical process, and long-term holding will cause hand fatigue of medical personnel, which affects the comfort of medical personnel and also reduces the accuracy of the operation. SUMMARY

[0005] The purpose of the present application is to solve the problems in the background art, and to provide a holding mechanism and surgical instrument thereof, which has stable clamping force and requires smaller and balanced holding force, has better operation flexibility and use comfort, and is provided with a holding locking mechanism, which reduces the influence of long-term holding of the trigger on the hands of medical personnel during use, improves the use comfort, and also improves the accuracy of the operation.

[0006] The above technical purpose of the present application is realized by the following technical scheme:

[0007] A holding mechanism and surgical instrument thereof, comprising a handle, a trigger, a transmission mechanism, a connecting sleeve, a protective sleeve, a surgical instrument and a power cord; the handle is provided with a trigger rotating shaft, a rotating wheel rotating shaft, a trigger slot, a spring clamping groove, a connecting sleeve tail pipe limiting boss, a connecting sleeve tail pipe opening and a trigger sliding rail; the trigger is provided with a trigger rotating hole and a trigger handle; the transmission mechanism comprises a rotating wheel, a rotating wheel return spring, a pull rod fixing shaft and a pull rod, and the rotating wheel comprises a rotating wheel rotating hole, a pull rod fixing hole and a spring top rod; the trigger is hinged with the trigger rotating shaft of the handle through the trigger rotating hole, and the trigger handle is extended outside the handle through the trigger slot; the transmission mechanism is hinged with the rotating wheel rotating shaft of the handle through the rotating wheel rotating hole of the rotating wheel; the spring top rod of the rotating wheel is inserted into the rotating wheel return spring, and the rotating wheel return spring is fixed in the spring clamping groove of the handle; the tail end of the pull rod close to the pull rod fixing shaft is connected with the pull rod fixing shaft in a key groove structure, and the pull rod fixing shaft is arranged in the pull rod fixing hole of the rotating wheel through hole shaft cooperation; the protective sleeve and the handle are connected through the connecting sleeve, the connecting sleeve comprises a connecting sleeve pipe and a connecting sleeve tail pipe, the connecting sleeve pipe end is connected with the protective sleeve tail end, and the connecting sleeve pipe is connected with the handle through the connecting sleeve tail pipe opening of the handle; the pull rod is wrapped by the protective sleeve, the surgical instrument is arranged at the front end of the protective sleeve, and the power cord is extended out through the power cord hole of the handle.

[0008] Preferably, the handle hand holding part and the trigger handle of the trigger are designed as micro-convex streamline, and the handle holding part of the trigger is provided with a handle blocking part.

[0009] The handle and the trigger handle holding part are designed as micro-convex streamline structure, which perfectly matches the structure of the palm of the hand, so that the medical staff will not be affected by the use comfort degree caused by the handle and the trigger handle holding part knocking the hand in the use process; the handle blocking part structure can protect the hands of the medical staff from being knocked in the process of holding the trigger and using, and the safety is improved.

[0010] Preferably, the trigger is provided with a trigger sliding boss, and the trigger sliding boss and the trigger sliding rail jointly form a sliding groove structure.

[0011] The design of the sliding groove structure can make the sliding boss correctly move in the direction specified by the sliding rail, and the sliding rail can also limit the movement of the trigger in other directions, so that the trigger will not shake left and right in the process of holding and releasing the trigger by the medical staff, and the use comfort and accuracy are improved.

[0012] Preferably, the surgical instrument on the protective sleeve is designed as detachable and replaceable.

[0013] The surgical instrument of the holding mechanism is designed to be replaceable, can be installed with a surgical instrument such as an electrocoagulation forceps or an electrocoagulation forceps, can be adapted to use in various surgical environments, and improves the practicability of the holding mechanism and the surgical instrument thereof.

[0014] As preferred, the trigger is provided with a trigger cam structure and a trigger gear structure, the rotating wheel is provided with a rotating wheel cam structure and a rotating wheel gear structure; the trigger cam structure is used in conjunction with the rotating wheel cam structure, and the trigger gear structure is used in conjunction with the rotating wheel gear structure.

[0015] Compared with the general connecting rod mechanism, the cam structure and the gear structure are relatively simple in structure, more reliable in work, more stable in transmission, can ensure that the surgical instrument such as the electrocoagulation forceps or the electrocoagulation forceps will not shake or have other abnormal conditions during use, and the clamping force is more stable; at the same time, the structure has a longer service life and better use effect, the structure of the connecting rod mechanism is omitted, the overall weight is reduced, and medical staff feels more comfortable during operation.

[0016] As preferred, the trigger cam structure includes a trigger cam and a trigger cam boss, the trigger gear structure includes a trigger gear and a trigger gear tooth, the rotating wheel cam structure is provided with a rotating wheel cam top rod, and the rotating wheel gear structure is provided with a rotating wheel gear.

[0017] As preferred, the trigger cam boss is higher than the tangent plane of the trigger cam, the trigger cam and the rotating wheel cam top rod are mutually attached, and the trigger gear and the rotating wheel gear are mutually meshed.

[0018] As preferred, in the trigger cam structure, the trigger cam structure is hingedly connected through the gap fit of the trigger rotating hole and the trigger rotating shaft of the handle, so that the trigger can rotate in the handle; in the trigger gear structure, the trigger gear structure is hingedly connected through the gap fit of the trigger rotating hole and the trigger rotating shaft of the handle, so that the trigger can rotate in the handle.

[0019] As preferred, in the rotating wheel cam structure, the rotating wheel cam structure is hingedly connected through the gap fit of the rotating wheel rotating hole and the rotating wheel rotating shaft of the handle, so that the rotating wheel cam structure can rotate in the handle; in the rotating wheel gear structure, the rotating wheel gear structure is hingedly connected through the gap fit of the rotating wheel rotating hole and the rotating wheel rotating shaft of the handle, so that the rotating wheel gear structure can rotate in the handle.

[0020] In the cam structure, the trigger is hinged through the trigger rotating hole and the trigger rotating shaft gap in the inside of the handle, and the rotating wheel cam structure is hinged through the rotating wheel rotating hole and the rotating wheel rotating shaft gap in the inside of the handle; in the operation process, the medical staff holds the trigger tightly, the trigger rotates along the trigger rotating shaft, drives the trigger cam boss to go up, because the trigger cam boss is higher than the tangent plane of the trigger cam, the trigger cam boss will push the rotating wheel cam rod up, the rotating wheel cam rod will drive the rotating wheel cam structure to rotate along the rotating wheel rotating shaft, the spring rod on the rotating wheel will push the rotating wheel reset spring and compress it, and the pull rod fixed shaft in the pull rod fixed hole will drive the pull rod to pull back; the medical staff releases the trigger, the rotating wheel will return to the original position under the elastic force of the rotating wheel reset spring, and the activity of the rotating wheel will also drive the trigger and the pull rod to return to the original position; the pull rod realizes the action of pulling back or stretching forward, and drives the surgical instruments such as the electric coagulation forceps or the electric coagulation forceps at the front end to perform the opening and closing movement.

[0021] In the gear structure, the trigger is connected through the trigger rotating hole and the trigger rotating shaft gap in the inside of the handle, and the rotating wheel gear structure is hinged through the rotating wheel rotating hole and the rotating wheel rotating shaft gap in the inside of the handle; in the operation process, the medical staff holds the trigger tightly, the trigger rotates along the trigger rotating shaft, drives the trigger gear to rotate, because the trigger gear and the rotating wheel gear are engaged with each other, the trigger gear will also drive the rotating wheel gear to rotate, the rotating wheel gear will drive the rotating wheel gear structure to rotate along the rotating wheel rotating shaft, the spring rod on the rotating wheel will push the rotating wheel reset spring and compress it, and the pull rod fixed shaft in the pull rod fixed hole will drive the pull rod to pull back; the medical staff releases the trigger, the rotating wheel will return to the original position under the elastic force of the rotating wheel reset spring, and the activity of the rotating wheel will also drive the trigger and the pull rod to return to the original position; the pull rod realizes the action of pulling back or stretching forward, and drives the surgical instruments such as the electric coagulation forceps or the electric coagulation forceps at the front end to perform the opening and closing movement.

[0022] The cam structure and the gear structure are more stable in the transmission process, have higher transmission efficiency, have constant transmission ratio, and the holding force applied by the medical staff is more balanced, so that the holding force is smaller throughout the process, and the comfort of the medical staff is higher.

[0023] Preferably, a holding locking mechanism is arranged on the handle and the trigger, a locking tooth is arranged on the trigger, a locking limiting boss, a locking rod, a locking rod reset spring, a locking reset button and a button reset spring are arranged on the handle, and the button part of the locking reset button is arranged on the outside of the handle.

[0024] When the medical staff holds the trigger tightly, the trigger moves inward along the trigger slide rail, the locking teeth on the trigger are locked by the locking rod in the handle after the locking rod is opened, the trigger cannot be automatically reset, at this time, the locking reset button on the handle is pressed down, the locking reset button drives the locking rod to move down, when the locking rod leaves the locking teeth on the trigger, the trigger returns to the original position under the elastic force of the rotating wheel reset spring, after the locking reset button is released, the locking reset button returns to the original position under the action of the button reset spring, and the locking rod also returns to the original position under the action of the locking reset spring; and the locking reset button has an anti-misoperation design, when the medical staff holds the handle, the locking reset button cannot be affected, and only the button can be pressed in the vertical direction of the tight grip to operate; the locking mechanism can cope with some special use conditions, such as the surgical process that needs to hold the trigger for a long time, the medical staff may have hand cramps or hand tremors due to time or extreme concentration, at this time, the holding force may be small, leading to unstable clamping, the locking mechanism can avoid the situation that the medical staff needs to hold the trigger for a long time, after locking, the medical staff can not need to hold the trigger tightly, the hand muscles are relaxed, the comfort of use is improved, and meanwhile, the situation of hand tremor or unstable clamping is avoided, and the accuracy of the operation is improved.

[0025] As a preference, the protective sleeve wraps the pull rod.

[0026] The pull rod is wrapped in the protective sleeve, which can prevent the pull rod from being exposed to air and being eroded by oxygen or other substances in the air, and can also avoid the situation that the pull rod and its connecting parts are contaminated or penetrated by external objects during the operation, leading to poor use effect or failure.

[0027] In summary, the beneficial effects of the present application are:

[0028] 1. The holding mechanism and surgical instrument disclosed by the present application adopt a micro-convex streamline design for the structure of the handle and the trigger holding part, so that the medical staff will not feel the hand during the holding process, the comfort of use is improved, the front end of the trigger can protect the medical staff from being bumped during the holding process, the safety is guaranteed, the design of the trigger slide rail and the sliding boss limits the movement of the trigger in other directions, so that the trigger will not shake left and right during the holding and releasing process, and the comfort and accuracy of use are also improved.

[0029] 2. The holding mechanism and surgical instrument disclosed by the present application have a replaceable front-end surgical instrument, which can install surgical instruments such as electrocoagulation forceps or electrocoagulation forceps, and can adapt to the use in various surgical environments, thereby improving the practicality of the holding mechanism and the surgical instrument.

[0030] 3、The holding mechanism and surgical instrument thereof, the transmission structure is cam structure and gear structure, compared with the commonly used connecting rod mechanism, the cam and gear structure is simple, the working performance is more stable, the transmission is more stable, the clamping force is more stable, and abnormal conditions such as shaking do not occur in the use process; meanwhile, the structure of the connecting rod mechanism is also saved, the weight of the whole holding mechanism is greatly reduced, and medical staff will also feel more comfortable in the use process.

[0031] 4、The holding mechanism and surgical instrument thereof, the cam structure and gear structure are more efficient in transmission process, the transmission ratio is constant, the holding force of medical staff is more balanced, and the holding force is not suddenly changed, and the holding force is smaller throughout the process.

[0032] 5、The holding mechanism and surgical instrument thereof, the design of the locking mechanism also avoids the situation that the trigger needs to be held for a long time, medical staff may have hand cramps and hand shaking due to long-time application of holding force or extreme concentration, at this time, the holding force is small, resulting in unstable clamping; the locking mechanism can avoid the situation that the trigger needs to be held for a long time, after locking, medical staff can not need to hold the trigger tightly, the handle muscle is relaxed, the accuracy of the operation and the comfort in the use process are improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 is a schematic diagram of the overall structure of the cam holding mechanism of the application;

[0034] Fig. 2 is a schematic diagram of the handle structure of the application;

[0035] Fig. 3 is a schematic diagram of the cam structure of the application;

[0036] Fig. 4 is a schematic diagram of the rotation structure of the cam structure of the application.

[0037] Fig. 5 is a schematic diagram of the overall structure of the gear holding mechanism of the application;

[0038] Fig. 6 is a schematic diagram of the gear structure of the application;

[0039] Fig. 7 is a schematic diagram of the rotation of the gear structure of the application;

[0040] Fig. 8 is a schematic diagram of the locking mechanism structure of the application;

[0041] Fig. 9 is a schematic diagram of the enlarged structure of the locking mechanism of the application.

[0042] Marked in the figure: 1-grip, 11-pull trigger rotation axis, 12-rotation wheel rotation axis, 13-pull trigger slot, 14-spring clamping slot, 15-connection sleeve tail pipe limiting boss, 16-connection sleeve tail pipe mouth, 17-pull trigger sliding rail, 18-grip hand holding part, 19-power cord hole, 2-pull trigger, 201-pull trigger cam structure, 2011-pull trigger cam, 2012-pull trigger cam boss, 202-pull trigger gear structure, 2021-pull trigger gear, 2022-pull trigger gear teeth, 21-pull trigger rotation hole, 22-pull trigger handle, 23-block handle, 24-pull trigger sliding boss, 3-transmission mechanism, 301-rotation wheel cam structure, 3011-rotation wheel cam top rod, 302-rotation wheel gear structure, 3021-rotation wheel gear, 31-rotation wheel, 311-rotation wheel rotation hole, 312-pull rod fixing hole, 313-spring top rod, 32-rotation wheel return spring, 33-pull rod fixing shaft, 34-pull rod, 4-grip locking mechanism, 41-locking tooth, 42-locking limiting boss, 43-locking rod, 44-locking rod return spring, 45-locking reset button, 46-button return spring, 5-connection sleeve, 51-connection sleeve pipe, 52-connection sleeve tail pipe, 6-protection sleeve pipe, 7-surgical instrument, 8-power cord. DETAILED DESCRIPTION

[0043] The following specific embodiments are only an explanation of the present application, which is not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

[0044] The present application will be described in detail below with examples in conjunction with the accompanying drawings.

[0045] Embodiment 1: According to the shown in FIG. 1-3, a cam structure of a gripping mechanism, including a grip 1, a pull trigger 2, a transmission mechanism 3; the grip 1 is provided with a pull trigger rotation axis 11, a rotation wheel rotation axis 12, a pull trigger slot 13, a spring clamping slot 14, a connection sleeve tail pipe limiting boss 15, a connection sleeve tail pipe mouth 16 and a pull trigger sliding rail 17, the pull trigger 2 is provided with a pull trigger rotation hole 21 and a pull trigger handle 22, the transmission mechanism 3 includes a rotation wheel 31, a rotation wheel return spring 32, a pull rod fixing shaft 33 and a pull rod 34, the rotation wheel 31 includes a rotation wheel rotation hole 311, a pull rod fixing hole 312 and a spring top rod 313;

[0046] The trigger 2 is hinged with the trigger rotating shaft 11 of the handle 1 through the trigger rotating hole 21, and the trigger handle 22 is extended outside the handle 1 through the trigger groove 13; the transmission mechanism 3 is hinged with the rotating wheel rotating shaft 12 of the handle 1 through the rotating wheel rotating hole 311 of the rotating wheel 31, the spring top rod 313 of the rotating wheel 31 is inserted into the rotating wheel reset spring 32, the rotating wheel reset spring 32 is fixed in the spring clamping groove 14 of the handle 1, the tail end of the pull rod 34 is connected with the pull rod fixed shaft 33 in the key groove structure, and the pull rod fixed shaft 33 is arranged in the pull rod fixed hole 312 of the rotating wheel 31 through the hole shaft cooperation;

[0047] According to the cam structure of the holding mechanism and the surgical instrument shown in FIG. 1, the cam structure of the holding mechanism and the surgical instrument include a holding mechanism, a connecting sleeve 5, a protective sleeve 6, a surgical instrument 7 and a power line 8, the connecting sleeve 5 includes a connecting sleeve 51 and a connecting sleeve tail pipe 52; the protective sleeve 6 and the handle 1 are connected through the connecting sleeve 5, the connecting sleeve 51 is connected with the tail end of the protective sleeve, the connecting sleeve tail pipe 52 is connected with the handle through the connecting sleeve tail pipe opening 16 of the handle 1, the pull rod 34 is arranged inside the protective sleeve 6, the surgical instrument 7 is arranged at the front end of the protective sleeve 6, and the power line 8 is extended outside through the power line hole 19 of the handle 1

[0048] The structure of the trigger 2 is a trigger cam structure 201, which includes a trigger cam 2011 and a trigger cam boss 2012; the structure of the transmission mechanism 3 is a rotating wheel cam structure 301, which includes a rotating wheel cam top rod 3011; the trigger cam boss 2012 is higher than the tangent plane of the trigger cam 2011, and the trigger cam 2011 and the rotating wheel cam top rod 3011 are mutually attached; in the trigger cam structure 201, the trigger 2 is hinged with the trigger rotating shaft 11 of the handle 1 through the trigger rotating hole 21, so that the trigger 2 can rotate in the handle 1; in the rotating wheel cam structure 301, the transmission mechanism 3 is hinged with the rotating wheel rotating shaft 12 of the handle 1 through the rotating wheel rotating hole 311, so that the transmission mechanism 3 can rotate in the handle 1.

[0049] According to the cam structure shown in FIG. 3, FIG. 4, in the use process, the medical staff holds the trigger 2 tightly, the trigger 2 will rotate along the trigger rotation shaft 11, the trigger cam 2011 will drive the trigger cam boss 2012 to go up during rotation, because the trigger cam boss 2012 is higher than the tangent plane of the trigger cam 2011, the trigger cam boss 2012 will top the rotary wheel cam top rod 3011 in the same direction, at this time the rotation of the rotary wheel cam top rod 3011 will drive the transmission mechanism 3 to rotate along the rotary wheel rotation shaft 12, the spring top rod 313 on the rotary wheel 31 will push the rotary wheel return spring 32 and compress it, at the same time the pull rod fixed shaft 33 in the pull rod fixed hole 312 will drive the pull rod 34 to pull back; the medical staff releases the trigger 2, the rotary wheel 31 will return to the original position under the action of the rotary wheel return spring 32, the movement of the rotary wheel 31 will also drive the trigger 2 and the pull rod 34 to return to the original position; the pull rod 34 realizes the action of pulling back or stretching forward, which drives the frontmost electrocoagulation forceps or electrocoagulation forceps and other surgical instruments 7 to perform opening and closing movement; the design advantage of the cam structure is that the structure is relatively simple, it is more simple and convenient to install and work more reliably, the cam structure is more stable in the transmission process, which can ensure that the electrocoagulation forceps or electrocoagulation forceps and other surgical instruments will not abnormally vibrate during use, the precision of use is improved, and the energy loss is less during the process of applying force, the clamping force is more stable; at the same time, compared with the bulky structure of the connecting rod mechanism, the overall weight of the simple structure of the cam structure is reduced a lot, which can make the medical staff feel more comfortable during operation.

[0050] Embodiment 2: According to the structure shown in FIG. 5, FIG. 6, which is different from the above-mentioned embodiment 1, the structure of the trigger 2 is a trigger gear structure 202, and the structure of the transmission mechanism 3 is a rotary wheel gear structure 302; the trigger gear structure 202 includes a trigger gear 2021 and a trigger gear tooth 2022, and the rotary wheel gear structure 302 includes a rotary wheel gear 3021, the trigger gear 2021 and the rotary wheel gear 3021 are engaged with each other; in the trigger gear structure 202, the trigger 2 is hinged to the trigger rotation shaft 11 of the handle 1 through the trigger rotation hole 21, so that the trigger 2 can rotate in the handle 1; in the rotary wheel gear structure 302, the transmission mechanism 3 is connected through the rotary wheel rotation hole 311 and the rotary wheel rotation shaft 12 of the handle 1 with a gap, so that the transmission mechanism 3 can rotate in the handle 1.

[0051] According to the gear structure shown in FIG. 6, FIG. 7, during use, the medical staff holds the trigger 2 tightly, the trigger 2 will rotate along the trigger rotation shaft 11, the trigger gear 2021 will drive the trigger gear teeth 2022 to rotate during rotation, because the trigger gear 2021 and the rotating wheel gear 3021 are meshed with each other, the trigger gear teeth 2022 will drive the rotating wheel gear 3021 to rotate in the opposite direction of the trigger gear 2021, at this time the rotation of the rotating wheel gear 3021 will drive the transmission mechanism 3 to rotate along the rotating wheel rotation shaft 12, the spring top rod 313 on the rotating wheel 31 will push against the rotating wheel return spring 32 and compress it, at the same time the pull rod fixed shaft 33 will drive the pull rod 34 to pull back, and the pull rod fixed shaft 33 in the pull rod fixed hole 312 will drive the pull rod 34 to pull back; the medical staff releases the trigger 2, the rotating wheel 31 will return to its original position under the action of the elastic force of the rotating wheel return spring 32, the movement of the rotating wheel 31 will also drive the trigger 2 and the pull rod 34 to return to their original positions; the pull rod 34 realizes the action of pulling back or extending forward, driving the surgical instrument 7 at the front end such as an electrocoagulation forceps or an electrocoagulation forceps to perform opening and closing movement; the design advantage of the gear structure is that the gear transmission is stable, the transmission precision is high, and it can adapt to the needs of high-precision surgery, at the same time the transmission ratio of the gear is constant, the transmission power is higher, the gripping force of the medical staff is more balanced, and the situation of sudden change of gripping force does not occur, and the clamping force provided is more stable, which can improve the accuracy during surgery; compared with the complex structure of the connecting rod mechanism and the like, the overall holding mechanism has a reduced weight, and the medical staff will feel more comfortable during use.

[0052] Example 3: According to FIG. 8, FIG. 9, different from the above-mentioned example 1 and example 2, the grip 1 and the trigger 2 are provided with a holding locking mechanism 4, the trigger 2 is provided with a locking tooth 41, the grip 1 is provided with a locking limiting boss 42, a locking rod 43, a locking rod return spring 44, a locking reset button 45 and a button reset spring 46, the hand pressing part of the locking reset button 45 is arranged outside the grip 1.

[0053] The holding locking mechanism 4 in use, after the medical staff hold the trigger 2, the trigger 2 will go inside along the trigger slide rail 17, the locking teeth 41 on the trigger 2 will be locked after the locking rod 43 in the handle 1 is opened, the trigger 2 will not be automatically reset, at this time, the locking reset button 45 on the handle 1 is pressed down, the locking reset button 45 will drive the locking rod 43 to move down, when the locking rod 43 is separated from the locking teeth 41 on the trigger 2, the trigger 2 will return to the original position under the elastic force of the rotating wheel reset spring 32, after the locking reset button 45 is released, the locking reset button 45 will return to the original position under the elastic force of the button reset spring 46, the locking rod 43 will also return to the original position under the elastic force of the locking rod reset spring 44 and press against the locking limit boss 42; And the locking reset button has an anti-misoperation design, the medical staff holding the handle will not affect the locking reset button 45, only pressing the button in the vertical direction of holding can be operated; This holding locking mechanism 4 can deal with some special use conditions, such as the surgical process that requires the medical staff to hold the trigger for a long time, the medical staff may appear hand weakness or hand tremor after a long time of applying holding force and extreme concentration of spirit, at this time, the holding force may become smaller and cause unstable clamping; The locking mechanism can avoid the situation of holding the trigger for a long time, after the locking mechanism is locked, the medical staff does not need to continue to apply holding force, the hand muscles are relaxed and rested, the accuracy of the operation is improved, the situation of the medical staff shaking hands or other situations accidentally touching the normal tissue of the patient to cause secondary injury is avoided, which provides protection for the safety of the patient, at the same time, the comfort of the medical staff in the use process is also improved.

Claims

1. A gripping mechanism, characterized by It includes: The handle (1), trigger (2) and transmission mechanism (3); The handle (1) is provided with trigger rotating shaft (11), rotating wheel rotating shaft (12), trigger slot (13), spring slot (14), connecting sleeve tail pipe limiting boss (15), connecting sleeve tail pipe mouth (16) and trigger slide rail (17); The trigger (2) is provided with trigger rotating hole (21) and trigger handle (22); The transmission mechanism (3) includes rotating wheel (31), rotating wheel reset spring (32), pull rod fixed shaft (33) and pull rod (34), the rotating wheel (31) includes rotating wheel rotating hole (311), pull rod fixed hole (312) and spring top rod (313); The trigger (2) is hinged with the trigger rotating shaft (11) of the handle (1) through the trigger rotating hole (21), and the trigger handle (22) is extended outside the handle (1) through the trigger slot (13); The transmission mechanism (3) is hinged with the rotating wheel rotating shaft (12) of the handle (1) through the rotating wheel rotating hole (311) of the rotating wheel (31); The spring top rod (313) of the rotating wheel (31) is inserted into the rotating wheel reset spring (32), and the rotating wheel reset spring (32) is fixed in the spring slot (14) of the handle (1); The end of the pull rod (34) close to the pull rod fixed shaft (33) is the tail end, the tail end of the pull rod (34) and the pull rod fixed shaft (33) are connected in keyway structure, and the pull rod fixed shaft (33) is arranged in the pull rod fixed hole (312) of the rotating wheel (31) through hole shaft cooperation.

2. A gripping mechanism according to claim 1, characterised in that The handle grip part (18) of the handle (1) and the trigger handle (22) of the trigger (2) are designed as micro-convex streamline, and the handle grip part of the trigger (2) is provided with a handle stop (23).

3. A gripping mechanism according to claim 1, wherein The trigger (2) is provided with a trigger sliding boss (24), and the trigger sliding boss (24) and the trigger slide rail (17) jointly form a sliding groove structure.

4. A gripping mechanism according to claim 1, wherein The trigger (2) is provided with a trigger cam structure (201) and a trigger gear structure (202), the rotating wheel (31) is provided with a rotating wheel cam structure (301) and a rotating wheel gear structure (302), the trigger cam structure (201) is used in matched with the rotating wheel cam structure (301), and the trigger gear structure (202) and the rotating wheel gear structure (302) are used in matched.

5. A gripping mechanism according to claim 4, wherein The trigger cam structure (201) includes a trigger cam (2011) and a trigger cam boss (2012), the trigger gear structure (202) includes a trigger gear (2021) and a trigger gear tooth (2022); The rotating wheel cam structure (301) is provided with a rotating wheel cam top rod (3011), and the rotating wheel gear structure (302) is provided with a rotating wheel gear (3021).

6. A gripping mechanism according to claim 5, wherein The trigger cam boss (2012) is higher than the tangent plane of the trigger cam (2011), the trigger cam (2011) and the rotating wheel cam top rod (3011) are mutually matched, and the trigger gear (2021) and the rotating wheel gear (3021) are mutually meshed.

7. A gripping mechanism according to claim 1, wherein The handle (1) and the trigger (2) are provided with a locking mechanism (4), the trigger (2) is provided with locking teeth (41), the handle (1) is provided with a locking limiting boss (42), a locking rod (43), a locking rod return spring (44), a locking reset button (45) and a button reset spring (46), and the button part of the locking reset button (45) is arranged outside the handle (1).

8. A surgical instrument, characterized by The holding mechanism comprises the handle (1), the trigger (2), the locking mechanism (4), the connecting sleeve (5), the protective sleeve (6), the surgical instrument (7) and the power cord (8).

9. A surgical instrument according to claim 8, wherein The protective sleeve (6) and the handle (1) are connected through the connecting sleeve (5), the connecting sleeve (5) comprises a connecting sleeve (51) and a connecting sleeve tail pipe (52), the connecting sleeve (51) is connected with the tail end of the protective sleeve (6), and the connecting sleeve tail pipe (52) is connected with the handle (1) through the connecting sleeve tail pipe opening (16) of the handle (1).

10. A surgical instrument according to claim 9, wherein The protective sleeve (6) wraps the pull rod (34), the surgical instrument (7) is arranged at the front end of the protective sleeve (6), the surgical instrument (7) is designed to be replaceable, and the power cord (8) extends out through the power cord hole (19) of the handle (1).

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