WO2022116872A1 - Electric puncturing instrument - Google Patents

Abstract

An electric puncturing instrument, comprising a puncturing component, an electric driving component, and a power converting component. The puncturing component comprises a shaft (1) and a blade (2). The front end of the shaft (1) is connected to the rear end of the blade (2). The rear end of the shaft (1) is connected to the front end of the power converting component. The electric driving component is used for generating a driving force. The power converting component is used for transmitting the driving force to the puncturing component, thus allowing the puncturing component to make back and forth movements. The rear end of the power converting component is electrically connected to the electric driving component. The electric puncturing instrument, by employing the electric driving component, converts electrical energy into kinetic energy that drives the puncturing instrument to make a puncturing movement, thus avoiding the problem of a poor puncturing effect due to uneven force application during a manual puncturing process.

Description

an electric puncture technical field

The invention relates to the field of medical instruments, in particular to an electric trocar used in surgical operations.

Background technique

In the current minimally invasive surgery, the most important tool is the trocar, which is used to pierce the abdominal wall and establish a channel between the outside world and the abdominal cavity, so that other minimally invasive surgical instruments can enter the human body cavity through this channel for surgical operations. The structure of the puncture device mainly includes two parts: a puncture sleeve and a puncture needle. When in use, the puncture needle is first inserted into the puncture sleeve, and then the rear end of the puncture sleeve is held by hand to exert force, and the tip of the front end of the puncture needle is used to squeeze the skin away. tissue into the abdominal cavity.

The main components of puncture needles for laparoscopic trocars currently on the market are roughly divided into knife-type and knife-free types. The knife-type is a stainless steel blade with a retractable outer protective shell, and the knife-free type is a plastic double-edged. The puncture needles for both punctures are disposable and cannot be disassembled for replacement. In addition, the knife-type blade is too sharp, which is easy to damage the tissue and affects postoperative healing; the non-knife-type blade is too blunt, and the puncture requires too much force.

When the existing knife-type trocar is punctured, the blade is always exposed outside the sheath, and the knife rod is completely pushed by the doctor's arm to cut into the skin. The continuous contact between the blade and the skin is relatively static cutting. As shown in Figure 1, the structure of the disposable trocar with a knife in the prior art includes a sleeve a, a puncture needle b, and a control scabbard telescopic assembly c. The control scabbard telescopic assembly c is located at the front end of the sleeve a, and the sleeve The front end of the barrel a also includes a plastic scabbard d, the puncture needle b is located in the sleeve a, the puncture needle is composed of a stainless steel core rod and a stainless steel blade e, and the stainless steel blade e is adapted to the plastic scabbard d. During puncture, the plastic scabbard d retreats to expose the blade of the stainless steel blade e due to the resistance of the skin, and the puncture needle can be continuously pressed to cut the blade of the stainless steel blade e into the skin to achieve puncture. In this structure, the puncture blade is always squeezed in the skin cutting gap, and the relative speed to the skin tissue is small, which is a typical static cutting. Although this structure can reduce the puncturing force, it still needs a certain pressing force when puncturing, and it is difficult to puncture. Sometimes it is necessary to rotate the trocar left and right to make it easier to penetrate. If the force is not well controlled, it is easy to reduce the quality of puncture, cause fascia damage, and cause fascia damage and foramen hernia. Moreover, for this puncture needle, the speed of each puncture depends on the strength of the doctor's arm and the difficulty of cutting the tissue.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an electric trocar, which can solve the problem that the trocar in the prior art is greatly affected by the doctor's own strength and the difficulty of tissue puncturing under the condition of ensuring the puncture quality.

In order to solve the above-mentioned technical problems, the technical solutions provided by the present invention are as follows:

An electric puncture device, comprising a puncture assembly, the puncture assembly includes a knife rod and a blade, the front end of the knife rod is connected with the rear end of the blade, and further comprises: an electric drive assembly, a power conversion assembly,

the electric drive assembly for generating driving force;

The power conversion assembly is used for transmitting the driving force to the puncturing assembly, so that the puncturing assembly performs a reciprocating movement forward and backward;

The rear end of the cutter bar is connected with the front end of the power conversion assembly, and the rear end of the power conversion assembly is electrically connected with the electric drive assembly.

In the present invention, by adopting an electric drive assembly, the electric energy is converted into kinetic energy, and the puncture assembly of the puncture device is driven to perform the puncturing movement, thereby avoiding the problems of uneven force and poor puncturing effect during the manual puncturing process, and reducing the medical risk of human misoperation , and increase the puncture strength for the tissues that are not easy to puncture, so as to reduce the discomfort of the patient.

Further, the power conversion assembly includes a power transmission assembly, a connecting rod,

the power transmission assembly is connected with the electric drive assembly for transmitting the driving force of the electric drive assembly to the connecting rod;

One end of the connecting rod is connected with the rear end of the cutter bar, and the other end of the connecting rod is connected with the power transmission assembly for converting the curvilinear reciprocating motion of the power transmission assembly into a linear reciprocating motion.

In the present invention, by adopting the linkage action of the power transmission component and the connecting rod, the kinetic energy of the electric drive component is first converted into a curved reciprocating motion, and then converted into the reciprocating motion of the tool bar moving forward and backward in a straight line, and the manual operation is changed to automatic execution, avoiding the need for The operator's force is uneven.

Further, the power conversion assembly includes a bracket, the base of the bracket is provided with a bracket through hole, the inner diameter of the bracket through hole is larger than the outer diameter of the knife rod, and the knife rod passes through the bracket through hole connected with the connecting rod.

Further, the electric drive assembly includes a battery pack, a loop switch and an electric motor, the battery pack, the loop switch and the electric motor are electrically connected in sequence to form a closed loop, and the loop switch is located on the support base.

In the present invention, in order to reasonably arrange each component, a bracket is added, and the loop switch is located on the bracket, which can fix the loop switch and facilitate the control of the loop switch.

Further, the support base is provided with a circuit switch slot for accommodating the circuit switch, and the circuit switch is used to control the operation of the electric motor,

The side wall of the hollow column of the knife rod sleeve is provided with a knife rod sleeve protrusion, which is used to control the closing and opening of the circuit switch. When the knife rod sleeve moves to the rear end, the knife rod sleeve The barrel protrusion is in contact with the circuit switch, so that the electric motor starts to work; when the knife rod sleeve moves to the front end, the knife rod sleeve protrusion is disconnected from the circuit switch, so that the The electric motor stops working.

In the present invention, the closing and opening of the circuit switch is controlled by adopting the protrusion of the knife rod sleeve on the rear end side wall of the knife rod sleeve to control the opening and closing of the circuit switch without relying on the external force of the operator to control the opening and closing of the loop switch directly. In the process of puncturing the tissue, the puncturing action is activated, which brings convenience to the operator.

Further, the power transmission assembly includes a wheel disc, the wheel disc is connected with the electric motor, a small hole is provided on the wheel disc, and the rear end of the connecting rod is provided with a first through hole of the connecting rod, so the The first through hole of the connecting rod and the small hole are fixedly connected by a pin.

The rear end of the knife rod is provided with a knife rod through hole, the front end of the connecting rod is provided with a connecting rod second through hole, and the knife rod through hole and the connecting rod second through hole are fixedly connected by a pin.

In the present invention, the small hole of the roulette wheel is fixedly connected with the first through hole of the connecting rod by using the pin, and the through hole of the cutter rod and the second through hole of the connecting rod are fixedly connected by the pin, so as to build a platform for converting electric energy into kinetic energy, Automates trocar piercing.

Further, a longitudinal spring is also provided between the cutter bar sleeve and the bracket, the cutter bar is sleeved in the longitudinal spring, and the outer diameter of the longitudinal spring is larger than the inner diameter of the bracket through hole, The outer diameter of the longitudinal spring is larger than the inner diameter of the bracket through hole and larger than the inner diameter of the cutter bar sleeve, and the outer diameter of the longitudinal spring is smaller than the inner diameter of the hollow column of the cutter bar sleeve.

Further, the backward distance of the cutter bar is the distance from the circumferential movement of the connecting rod to the highest point of the roulette; the forward distance of the cutter bar is the circumferential movement of the connecting rod to the lowest point of the roulette. distance in time.

In the present invention, the forward and backward distances of the tool bar can be determined by selecting different types of longitudinal springs, so that the setting of the forward and backward distances of the tool bar is more flexible.

Further, when the protrusion of the knife shank sleeve moves to the contact of the circuit switch, it is the maximum distance that the knife sheath retreats, and the distance can ensure that the blade is unsheathed.

Further, an electric motor slot is provided on the side wall of the bracket for accommodating the electric motor, the electric motor slot is a cylindrical structure with an open side wall, and is perpendicular to the side wall of the bracket, and the electric motor The inner diameter of the slot is larger than the outer diameter of the electric motor.

After adopting such a design, the present invention has at least the following advantages:

(1) The present invention converts electrical energy into kinetic energy by adopting an electric drive member, and drives the puncture device to perform puncturing motion, thereby avoiding the problem of uneven force and poor puncturing effect during manual puncturing.

(2) The present invention controls the closing and opening of the circuit switch by adopting the protrusion of the knife rod sleeve, and does not need to rely on the external force of the operator to control the opening and closing of the circuit switch. The puncturing action brings convenience to the operator.

(2) The present invention has simple structure and good effect.

Description of drawings

The above is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of the trocar in the prior art;

2 is a schematic diagram of the overall frame of the sleeveless trocar in an embodiment of the present invention;

3 is a schematic diagram of the overall frame of the trocar with a sleeve in an embodiment of the present invention;

4 is a schematic structural diagram of a trocar in an embodiment of the present invention;

Figure 5 is a schematic diagram of disassembly of the structure of the trocar in an embodiment of the present invention;

6 is an exploded view of a partial structure of the trocar in an embodiment of the present invention;

FIG. 7 is an exploded view of the partial structure of the trocar in an embodiment of the present invention;

8 is a cross-sectional view of a stent in an embodiment of the present invention;

9 is a structural diagram of an electric drive assembly in an embodiment of the present invention;

in,

a is the sleeve, b is the puncture needle, c is the control scabbard telescopic assembly, d is the plastic scabbard, e is the stainless steel blade, 1 is the knife rod, 11 is the knife rod sleeve, 12 is the knife rod through hole, and 111 is the knife rod sleeve. The sleeve of the knife rod is convex, 2 is the blade, 21 is the scabbard, 3 is the connecting rod, 31 is the first through hole of the connecting rod, 32 is the second through hole of the connecting rod, 4 is the bracket, 41 is the through hole of the bracket, 42 Electric motor slot, 5 is the circuit switch, 6 is the electric motor, 7 is the roulette, 71 is the small hole of the roulette, 8 is the longitudinal spring, 9 is the transverse spring, and 10 is the lock.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thoroughly understood, and will fully convey the scope of the present invention to those skilled in the art.

The end of each of the following parts near the blade is called the front end, and the end away from the blade is called the rear end.

As shown in Figures 2-9, an embodiment of the present invention provides an electric puncture device, including a puncture assembly, the puncture assembly includes a cutter bar 1 and a blade 2, the front end of the cutter bar 1 is connected to the rear end of the blade 2, and the The rear end is connected with the front end of the power conversion assembly, and also includes, an electric drive assembly, a power conversion assembly,

Electric drive components for generating drive force;

The power conversion component is used to transmit the driving force to the puncture component, so that the puncture component can reciprocate;

The rear end of the power conversion assembly is electrically connected with the electric drive assembly, and the front end of the power conversion assembly is connected with the rear end of the puncture assembly.

In this embodiment, by using an electric drive element to convert electrical energy into kinetic energy, the puncturing component of the puncture device is driven to perform puncturing motion. The medical risk of misoperation; on the other hand, the puncture device of the present application increases the puncturing force on the tissue that is not easy to puncture, and reduces the discomfort of the patient.

Wherein, the cutter bar 1 and the blade 2 may have an integral structure or a split structure, which is not limited in this embodiment.

Exemplarily, in this embodiment, the cutter bar 1 and the blade 2 are of a split structure. A knife rod sleeve 11 is provided outside the knife rod 1, and a knife sheath 21 is provided outside the blade 2. The knife rod sleeve 11 is used to accommodate the knife rod 1, and the knife sheath 21 is used to accommodate the blade 2. The front end of the knife sheath 21 has the same structure and shape. The shape of the blade 2 is adapted, and the front end of the scabbard 21 is provided with an outlet groove of the blade 2 , and the rear end of the scabbard 21 is fixedly connected with the front end of the shank sleeve 11 .

The cutter bar sleeve 11 is a hollow tubular structure, and the inner channel facilitates the forward and backward reciprocating movement of the cutter bar 1 . The scabbard 21 is a hollow structure, and the inner channel facilitates the forward and backward reciprocating movement of the blade 2 . The cutter bar 1 drives the blade 2 to move forward and backward together.

The connection method between the scabbard 21 and the shank sleeve 11 is not limited, and can be in the form of a snap connection or a threaded form, which will not be repeated here.

In the above solution of the present application, the cutter bar 1 and the blade 2 are of a separate structure, and the cutter bar 1 can be disassembled, which solves the problem that the existing puncture is a completely non-removable structure, and the inner cutter bar can only be used once, and the entire puncture needs to be discarded after use. , causing a lot of waste.

In this embodiment, the power conversion assembly includes a power transmission assembly, a connecting rod 3,

The power transmission assembly is connected with the electric drive assembly for transmitting the driving force of the electric drive assembly to the connecting rod 3;

One end of the connecting rod 3 is connected with the rear end of the cutter bar 1, and the other end of the connecting rod 3 is connected with the power transmission assembly, which is used to convert the curvilinear reciprocating motion of the power transmission assembly into linear reciprocating motion.

In the present invention, by adopting the linkage action of the power transmission component and the connecting rod, the kinetic energy of the electric drive component is first converted into a curved reciprocating motion, and then converted into the reciprocating motion of the tool bar moving forward and backward in a straight line, and the manual operation is changed to automatic execution, avoiding the need for The operator's force is uneven.

The power transmission assembly and the cutter bar 1 are connected through the connecting rod 3, so that the kinetic energy transmitted by the power transmission assembly is transmitted to the cutter bar 1 through the connecting rod 3, so that the cutter bar 1 can perform puncturing motion.

The power conversion assembly also includes a bracket 4. The side wall of the bracket 4 is used to fix the power transmission assembly. A bracket through hole 41 is provided on the base of the bracket 4. The inner diameter of the bracket through hole 41 is larger than the outer diameter of the tool bar 1. The tool bar 1 is connected to the connecting rod 3 through the through hole 41 of the bracket.

The through hole 41 of the bracket is located at the center of the base of the bracket 4. The tool bar 1 has a tool bar sleeve 11. The inner diameter of the bracket through hole 41 should be smaller than the outer diameter of the tool bar sleeve 11 to prevent the tool bar sleeve 11 from passing through the bracket. The through hole 41 ensures that only the tool bar 1 can pass through the bracket through hole 41 .

In the embodiment of the present invention, the rear end of the tool bar 1 is provided with a tool bar through hole 12, the front end of the connecting bar 3 is provided with a connecting bar first through hole 31, and the tool bar through hole 12 and the connecting bar first through hole 31 pass through a nail. Pin fixed connection.

Specifically, the fixing method of the cutter bar 1 and the connecting bar 3 may also adopt other fixing methods, which will not be repeated here.

In this embodiment, the cutter bar 1 has a cylindrical structure, the rear end of the cutter bar 1 is provided with a protrusion with a smooth end, and the end face of the protrusion is provided with a cutter bar through hole 12 .

In this embodiment, the electric drive assembly includes a battery pack, a loop switch 5 and an electric motor 6 . The battery pack, the loop switch 5 and the electric motor 6 are electrically connected in sequence to form a closed loop, and the switch is located on the base of the bracket 4 .

A loop switch slot for fixing the loop switch 5 is provided on the base of the bracket 4 , and the loop switch slot is adapted to the loop switch 5 .

In the present invention, in order to reasonably arrange the components, a bracket 4 is added, and the loop switch 5 is located on the bracket 4 , which can fix the loop switch 5 and facilitate the control of the loop switch 5 .

The rear end of the tool bar sleeve 11 is provided with a hollow column, and the side wall of the hollow column is provided with a tool bar sleeve protrusion 111 for controlling the closing and opening of the circuit switch 5. When the tool bar sleeve 11 moves to the rear end direction When the cutter bar sleeve 111 is in contact with the circuit switch 5, the circuit switch 5 is triggered to close, and the electric motor 6 starts to work. When the cutter bar sleeve 11 moves to the front end, it moves to a certain position position until the cutter bar sleeve protrusion 111 is disconnected from the circuit switch 5, the trigger circuit switch 5 is turned on, and the electric motor 6 stops working.

In this embodiment, the closing and opening of the circuit switch 5 is controlled by using the protrusion 111 of the cutter bar sleeve, and there is no need to additionally rely on the external force of the operator to control the opening and closing of the circuit switch 5. The puncturing action is started, which brings convenience to the operator.

In this embodiment, the power transmission assembly includes a wheel disc 7 , the wheel disc 7 and the electric motor 6 are respectively located on both sides of the side wall of the bracket 4 , and the side wall of the bracket 4 is provided with an electric motor through hole. The wheel disc 7 is connected with the electric motor 6, the wheel disc 7 is provided with a small hole, the connecting rod 3 is provided with a connecting rod first through hole 31, and the connecting rod first through hole 31 and the small hole are fixedly connected by a pin.

The rear end of the tool bar 1 is provided with a tool bar through hole 12, the connecting bar 3 is provided with a connecting bar second through hole 32, and the tool bar through hole 12 and the connecting bar second through hole 32 are fixedly connected by a pin.

Both the wheel disc 7 and the cutter bar 1 are located on the same side of the connecting bar 3 .

In this embodiment, the size of the first through hole 31 of the connecting rod and the second through hole 32 of the connecting rod of the connecting rod 3 are different. Preferably, the diameter of the first through hole 31 of the connecting rod of the connecting rod 3 is larger than that of the second through hole 32 of the connecting rod.

In the present invention, the small hole of the roulette wheel is fixedly connected with the first through hole 31 of the connecting rod by using a pin, and the through hole 12 of the cutter rod and the second through hole 32 of the connecting rod are fixedly connected by using a pin, so as to build a structure that converts electrical energy into kinetic energy. platform to automate the puncture of the trocar.

In this embodiment, a longitudinal spring 8 is also provided between the cutter bar sleeve 11 and the bracket 41 , the outer diameter of the cutter bar 1 is smaller than the inner diameter of the longitudinal spring 8 , the cutter bar 1 is sleeved in the longitudinal spring 8 , and the longitudinal spring 8 The outer diameter is larger than the inner diameter of the through hole of the bracket, a hollow protrusion is arranged at the through hole of the bracket, and the outer diameter of the longitudinal spring 8 is smaller than the hollow protrusion. The longitudinal spring 8 enters the hollow bulge to prevent the longitudinal spring 8 from continuing to move toward the rear end, thereby positioning the longitudinal spring 8 .

The depth of the hollow column at the rear end of the cutter bar sleeve 11 is smaller than the height of the longitudinal spring 8 , for accommodating part of the longitudinal spring 8 and for positioning the longitudinal spring 8 .

In this embodiment, the outer diameter of the longitudinal spring 8 is larger than the inner diameter of the cutter bar sleeve 11 , and the outer diameter of the longitudinal spring 8 is smaller than the outer diameter of the hollow column at the rear end of the cutter bar sleeve 11 .

In this embodiment, the inner diameter of the through hole of the bracket and the inner diameter of the hollow column at the rear end of the cutter bar sleeve 11 may be the same or different, which are not limited herein.

In this embodiment, the electric trocar also includes a transverse spring 9 and a lock catch 10 . The center of the lock catch 10 is provided with a lock catch through hole, the side wall of the bracket 4 is provided with a baffle plate, and the transverse spring 9 is located between the baffle plate and the lock catch 10 . time, for resisting the retraction of the transverse spring 9. When the axial center of the locking hole and the through hole of the bracket coincide, the transverse spring 9 is in a compressed state, and the cutter bar 1 can perform puncturing movement; when the axial center of the locking hole and the through hole of the bracket do not coincide, the transverse spring 9 is in an extended state , the cutter bar 1 stops the puncturing movement.

The inner diameter of the hollow protrusion of the locking through hole may or may not be the same as the inner diameter of the bracket through hole, which is not limited herein.

In this embodiment, the distance that the cutter bar 1 moves to the rear end is the distance when the connecting bar 3 moves circumferentially to the highest point of the wheel disc 7; the distance that the cutter bar 1 moves to the front end is the circumferential movement of the connecting bar 3 to the wheel disc 7 The distance at the lowest point.

In this embodiment, when the blade shank protrusion 111 moves to contact with the circuit switch 5 , it is the maximum distance that the blade sheath 21 retreats, and this distance can ensure that the blade 2 is unsheathed.

In this embodiment, the telescopic stroke position of the scabbard 21 is ahead of the reciprocating stroke position of the blade 2 , and the telescopic stroke position of the scabbard 21 and the reciprocating stroke position of the blade 2 overlap by 2 mm to 6 mm. Preferred is 3 mm to 5 mm.

In this embodiment, the roulette 7 and the electric motor 6 are respectively located on both sides of the side wall of the bracket 41 , the side wall of the bracket 4 is provided with an electric motor through hole, the roulette 7 is connected with the electric motor 6 , and the roulette 7 is connected with the cutter bar 1 . Both are located on the same side of the connecting rod 3 .

In this embodiment, the base of the bracket 4 is provided with an electric motor slot 42 for accommodating the electric motor 6 . The electric motor slot 42 is a cylindrical structure with an open side wall, and the inner diameter of the electric motor slot 42 is larger than the outer diameter of the electric motor 6 . .

In the embodiment of the present invention, the working process of the electric trocar is as follows:

Initial state:

The electric motor 6 is installed in the electric motor slot 42 of the bracket 4 and is connected to the wheel disc 7. The wheel disc small hole 71 of the wheel disc 7 is connected to the first through hole 31 of the connecting rod through a pin, and the second through hole 32 of the connecting rod is connected. It is connected with the tool bar through hole 12 at the rear end of the tool bar 1 through a pin. The tool bar 1 passes through the longitudinal spring 8 before being connected to the connecting bar 3 .

Working status:

Press the lock catch 10 manually, the transverse spring 9 is compressed, the elastic hook-like structure on the side of the inner hole of the lock catch 10 hooks the small protrusion inside the lower casing, and the lock catch 10 remains at this position. Under the action of the baffle plate of the bracket 4, the transverse spring 9 will not pop out, and the through hole of the lock buckle 10, the through hole 41 of the bracket and the through hole of the knife shank sleeve 11 are coaxial circle centers, and the resistance of the abdominal wall tissue to the knife sheath 21 during puncture , the cutter bar sleeve 11 together with the knife sheath 21 moves towards the rear end. Because the outer diameter of the longitudinal spring 8 is larger than the inner diameter of the bracket through hole 41, the longitudinal spring 8 is prevented from moving, so that the longitudinal spring 8 is compressed, and the cutter bar sleeve 11 During the movement of the tool bar sleeve protrusion 111 on the rear end side wall with the tool bar sleeve 11 to the rear end, the tool bar sleeve protrusion 111 triggers the circuit switch 5 to close it to form a circuit, so that the electric motor 6 Start, the tool bar 1 drives the blade 2 to start reciprocating back and forth. At the same time, the rear end surface of the cutter bar sleeve 11 abuts against the inner elastic hook-like structure of the lock catch 10 and makes it release during the backward movement. The rear end outer side wall of the cutter bar sleeve 11 cannot further reset and slip.

After the abdominal wall tissue is pierced, the knife sheath 21 is no longer subject to tissue resistance. Under the action of the restoring force of the longitudinal spring 8, the knife rod sleeve 11 moves toward the front end. When the protrusion 111 moves to the front end with the knife rod sleeve 11, the knife rod sleeve protrusion 111 is far away from the circuit switch 5 to form an open circuit, so that the electric motor 6 stops working, and the knife rod 1 drives the blade 2 to stop. Back and forth movement. At the same time, during the forward movement of the cutter bar sleeve 11, the outer side wall of the rear end no longer abuts the side surface of the through hole in the lock catch 10, and the lock catch 10 further slides under the restoring elastic force of the transverse spring 9 until it is completely reset. At this time, the lock catch The through hole 10 and the through hole 41 of the bracket and the through hole of the cutter bar sleeve 11 are no longer coaxial, and the end face of the through hole abuts the rear end surface of the cutter bar sleeve 11, so that it cannot move back again.

After adopting such a design, the present invention has at least the following advantages:

(1) The present invention converts electrical energy into kinetic energy by adopting an electric drive member, and drives the puncture device to perform puncturing motion, thereby avoiding the problem of uneven force and poor puncturing effect during manual puncturing.

(2) The present invention controls the closing and opening of the circuit switch by adopting the protrusion of the knife rod sleeve, and does not need to rely on the external force of the operator to control the opening and closing of the circuit switch. The puncturing action brings convenience to the operator.

(3) The present invention is simple in structure and good in effect.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Those skilled in the art make some simple modifications, equivalent changes or modifications by using the technical contents disclosed above, all of which fall within the scope of the present invention. within the scope of protection of the invention.

Claims (10)

An electric puncture device, comprising a puncture assembly, the puncture assembly includes a knife rod and a blade, the front end of the knife rod is connected with the rear end of the blade, and further comprises: an electric drive assembly, a power conversion assembly, the electric drive assembly for generating driving force; The power conversion assembly is used for transmitting the driving force to the puncturing assembly, so that the puncturing assembly performs a forward and backward reciprocating motion; The rear end of the cutter bar is connected with the front end of the power conversion assembly, and the rear end of the power conversion assembly is electrically connected with the electric drive assembly. The electric trocar of claim 1, wherein the power conversion assembly comprises a power transmission assembly, a connecting rod, the power transmission assembly is connected with the electric drive assembly for transmitting the driving force of the electric drive assembly to the connecting rod; One end of the connecting rod is connected with the rear end of the cutter bar, and the other end of the connecting rod is connected with the power transmission assembly, and is used for converting the curvilinear reciprocating motion of the power transmitting assembly into a linear reciprocating motion. The electric trocar according to claim 2, wherein the power conversion assembly comprises a bracket, a bracket through-hole is formed on the base of the bracket, and the inner diameter of the bracket through-hole is larger than the outer diameter of the cutter bar, The cutter rod is connected to the connecting rod through the through hole of the bracket. The electric trocar of claim 3, wherein the electric drive assembly comprises a battery pack, a loop switch and an electric motor, the battery pack, the loop switch and the electric motor are electrically connected in sequence to form a closed loop, and the loop switch on the stand base. The electric trocar as claimed in claim 4, wherein the support base is provided with a loop switch slot for accommodating the loop switch, and the loop switch is used to control the electric motor to work, The cutter bar is sleeved in the cutter bar sleeve, and the rear end side wall of the cutter bar sleeve is fixed with a hollow column, The side wall of the hollow column of the knife rod sleeve is provided with a knife rod sleeve protrusion, which is used to control the closing and opening of the circuit switch. When the knife rod sleeve moves to the rear end, the knife rod sleeve The barrel protrusion is in contact with the circuit switch, so that the electric motor starts to work; when the knife rod sleeve moves to the front end, the knife rod sleeve protrusion is disconnected from the circuit switch, so that the The electric motor stops working. The electric trocar according to claim 5, wherein the power transmission assembly comprises a wheel, the wheel is connected with the electric motor, the wheel is provided with a wheel hole, and the connecting rod The rear end of the connecting rod is provided with a first through hole of a connecting rod, and the first through hole of the connecting rod and the small hole of the wheel disc are fixedly connected by a pin. The rear end of the knife rod is provided with a knife rod through hole, the front end of the connecting rod is provided with a connecting rod second through hole, and the knife rod through hole and the connecting rod second through hole are fixedly connected by a pin. The electric trocar according to claim 6, wherein a longitudinal spring is further provided between the cutter bar sleeve and the bracket, the cutter bar is sleeved in the longitudinal spring, and the longitudinal spring The outer diameter of the longitudinal spring is larger than the inner diameter of the through hole of the bracket, the outer diameter of the longitudinal spring is larger than the inner diameter of the cutter bar sleeve, and the outer diameter of the longitudinal spring is smaller than the inner diameter of the hollow column of the cutter bar sleeve. The electric puncture device according to claim 7, characterized in that, the distance that the knife bar retreats is the distance when the connecting rod moves circumferentially to the highest point of the roulette; the distance that the knife bar advances is The distance when the connecting rod moves circumferentially to the lowest point of the roulette. The electric trocar according to claim 8, characterized in that, when the protrusion of the knife bar sleeve moves to the contact of the circuit switch, it is the maximum distance that the knife sheath retreats, and the distance can ensure the blade unsheathed. The electric trocar according to claim 9, wherein an electric motor slot is provided on the side wall of the bracket for accommodating the electric motor, and the electric motor slot is a cylindrical structure with an open side wall, and the electric motor slot is a cylindrical structure with an open side wall. The side wall of the bracket is vertical, and the inner diameter of the electric motor slot is larger than the outer diameter of the electric motor.

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