A type of basket and a stone retrieval basket

Abstract

This invention discloses a basket body and a stone retrieval basket, belonging to the field of medical device technology. The basket body, used in stone retrieval baskets, includes at least two basket wires. The distal ends of the basket wires are fixedly connected to each other, and the proximal ends of the basket wires extend towards the proximal end of the stone retrieval basket. The distal portions of the basket wires can deform in a direction away from the axis of the basket body to form a basket structure for capturing stones. At least one basket wire is a gel wire, and at least one basket wire is a magnetic guide wire. The gel wire is hollow inside and has an inlet and an outlet communicating with its interior. The inlet is used to inject magnetic hydrogel, and the outlet is used to discharge magnetic hydrogel. The outlet is located at the distal end of the gel wire. This application uses gel wires and magnetic guide wires as basket wires, forming a basket body. Under the operator's control, it captures fragmented stones inside the body. By utilizing the magnetic hydrogel discharged from the gel wire and the magnetic guide wire in combination, the clearance rate of residual stones is improved, and the operation time is shortened.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a basket body and a stone retrieval basket. Background Technology

[0002] In related technologies, when treating stones in the renal pelvis, laser lithotripsy is first used, followed by negative pressure aspiration to remove the remaining stones. However, due to the wide diffusion range of kidney stone fragments during laser lithotripsy, the stone removal rate during negative pressure aspiration can only reach a maximum of 70%. The remaining fragments can only be naturally excreted by bodily fluids, resulting in a low stone removal rate, and the residual fragments easily lead to stone recurrence. Summary of the Invention

[0003] The purpose of this application is to provide a basket body and a stone retrieval basket to solve the above-mentioned technical problems existing in the prior art.

[0004] This application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a basket body for use in stone retrieval baskets, comprising at least two basket wires, the distal ends of which are fixedly connected to each other, the proximal ends of which extend toward the proximal end of the stone retrieval basket, and the distal portions of which can deform in a direction away from the axis of the basket body to form a basket structure for capturing stones; wherein, at least one basket wire is a gel wire, and at least one basket wire is a magnetic wire, the gel wire is hollow inside, and the gel wire has an inlet and an outlet communicating with its interior, the inlet being used to inject magnetic hydrogel, and the outlet being used to output magnetic hydrogel, the outlet being located at the distal end of the gel wire.

[0006] Secondly, this application provides a stone retrieval basket, including the basket body provided in the first aspect embodiment, and also including a sheath and a handle. The sheath is connected to the handle, and the basket body is inserted into the sheath. The basket body can extend out of the distal end of the sheath under external force, and the portion of the basket wire located outside the distal end of the sheath can deform to form a basket structure.

[0007] The technical solution provided in this application can achieve the following beneficial effects:

[0008] In this application, gel wires and magnetic guide wires are used as basket wires, which work together to form a basket body to capture stone fragments within the body under operator control. The gel wires are equipped with outlets to dissipate magnetic hydrogel, which is composed of superparamagnetic iron oxide nanoparticles (SPION) and a biopolymer (chitosan). The superparamagnetic iron oxide nanoparticles bind to calcium ions exposed on the surface of the stone fragments, while the biopolymer (chitosan) aggregates the nanoparticles onto the stone fragments through ionogelation. Simultaneously, magnetic guide wires are introduced, using alternating polarity to recover the stone fragments encapsulated by the magnetic hydrogel. The stone fragments are adsorbed onto the magnetic guide wires and withdrawn from the body along with them. The combination of magnetic hydrogel and magnetic guide wires improves the clearance rate of residual stones in the renal pelvis, enhances surgical outcomes, and shortens surgical time. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the overall structure of the basket body provided in some embodiments of this application;

[0011] Figure 2 This application is about Figure 1 Detailed view of point A;

[0012] Figure 3 This is a schematic diagram of the overall structure of the stone retrieval basket provided in some embodiments of this application;

[0013] Figure 4 This application is about Figure 3 Detailed image of point B;

[0014] Figure 5 This is a cross-sectional view of a stone retrieval basket provided in some embodiments of this application. Figure 1 ;

[0015] Figure 6 This application is about Figure 5 Detailed image of point C;

[0016] Figure 7 This is a cross-sectional view of a stone retrieval basket provided in some embodiments of this application. Figure 2 ;

[0017] Figure 8 This application is about Figure 7 Detailed image of point D;

[0018] Figure 9 This is a schematic diagram showing the disassembled stone retrieval basket provided in some embodiments of this application;

[0019] Figure 10 This application is about Figure 9 Detailed image of point E.

[0020] In the diagram: 100-mesh wire, 110-gel wire, 111-liquid outlet, 120-magnetic wire, 130-metal wire, 200-sheath, 300-handle, 310-installation opening, 320-installation channel, 330-installation slot, 400-electric control board, 500-airbag, 510-liquid storage chamber, 600-operating component, 610-knob, 620-pressure part, 700-moving shaft, 800-push button, 900-power switch. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] In various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope, stone retrieval basket and its accessories relative to the user in the usage environment. The end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0023] This application provides a mesh basket body for use in stone retrieval. For example, see... Figure 3 As shown, the stone retrieval basket includes a sheath 200, a handle 300, and a basket body. The sheath 200 is connected to the handle 300, and the basket body is inserted into the sheath 200. The basket body moves within the sheath 200 and establishes a channel in the human body through the sheath 200, allowing the basket body to extend into the human body through the sheath 200.

[0024] The basket body consists of at least two basket wires 100, for reference. Figure 1 and Figure 2 As shown, the distal ends of the basket wires 100 are fixedly connected to each other, and the proximal ends of the basket wires 100 extend toward the proximal end of the stone retrieval basket to facilitate the operator's control of the basket body's position. The distal portions of the basket wires 100 can deform in the direction of the basket body's axis to form a basket structure for capturing stones.

[0025] It is understood that the basket wire 100 is located inside the sheath 200 during use. By controlling the relative position of the basket wire 100 and the sheath 200, the distal end of the basket wire 100 can be controlled to extend out of the sheath 200. The basket wire 100 is deformable. After the operator controls the distal end of the basket wire 100 to extend out of the sheath 200, the constraint effect of the sheath 200 on the basket wire 100 disappears, and the basket wire 100 can deform in a direction away from the axis of the basket body. That is, multiple basket wires 100 move away from each other, increasing the spacing between adjacent basket wires 100, thereby expanding to form a basket structure. The basket structure can capture stones inside, and at the same time, the overall volume of the basket structure is large, which can cover more areas.

[0026] After the operator controls the distal end of the basket wire 100 to move into the sheath 200, the basket wire 100 is constrained by the sheath 200. Under the constraint, it deforms, reducing the distance between adjacent basket wires 100 and capturing the stone.

[0027] Among them, at least one basket wire 100 is a gel wire 110, and at least one basket wire 100 is a magnetic wire 120, which can be referred to. Figure 1 and Figure 2 As shown. The gel filament 110 is hollow inside and has an inlet and an outlet 111 communicating with its interior. The inlet is used to inject magnetic hydrogel and the outlet 111 is used to output magnetic hydrogel. The outlet 111 is located at the distal end of the gel filament 110.

[0028] The magnetic hydrogel is composed of superparamagnetic iron oxide nanoparticles (SPION) and a biopolymer (chitosan). The SPION nanoparticles bind to calcium ions exposed on the surface of the lithotripsy, while the chitosan aggregates the nanoparticles onto the lithotripsy through ionogel action. A magnetic guide wire 120 works in conjunction with the magnetic hydrogel, using alternating polarity to retrieve the lithotripsy encapsulated by the hydrogel. The lithotripsy is adsorbed onto the magnetic guide wire 120 and withdrawn from the body along with it. Utilizing the combination of the magnetic hydrogel and the magnetic guide wire 120 improves the clearance rate of residual stones in the renal pelvis, enhances surgical outcomes, and shortens surgical time.

[0029] Using the gel wire 110 and magnetic guide wire 120 as the basket wire 100 offers greater control and precision compared to directly inserting them into the body. The overall basket wire 100 facilitates precise positioning, particularly at the distal ends of the magnetic guide wire 120 and gel wire 110, improving surgical outcomes. Furthermore, the use of the stone retrieval basket allows for coverage of a wider area of ​​lithotripsy. Adjusting the basket's position allows for control of the gel wire 110 and magnetic guide wire 120, as well as the dispensing location of the magnetic hydrogel, inducing stone aggregation, adsorption, and traction. This increases the coverage area per procedure, improving stone removal efficiency and effectiveness. Additionally, maintaining a distance between the magnetic guide wire 120 and gel wire 110 prevents the gel wire 110 from obstructing the space around the magnetic guide wire 120, facilitating stone adsorption and further enhancing stone removal rates.

[0030] Furthermore, traditional stone retrieval baskets can only capture stones within the basket's internal space, limiting the effective capture area, especially in environments with limited adjustment space, such as the lower calyx of the kidney, where the effective working area of ​​traditional stone retrieval baskets is even narrower. However, the stone retrieval basket of this application has an effective capture area not limited to the basket's internal space. It can also capture stones around the outer periphery of the magnetic guide wire 120 in conjunction with the gel wire 110. For example, the basket body extends from the sheath 200, allowing the gel wire 110 inside the basket to approach the stone. Magnetic hydrogel flowing from the gel wire 110 attracts and coats the outer fragments of the stone. Then, the stone retrieval basket is rotated so that the magnetic guide wire 120 aligns with the stone fragments, magnetically fixing the fragments coated with the magnetic hydrogel. This allows for stone capture within a limited adjustment space, effectively increasing the effective capture area of ​​the stone retrieval basket, improving stone removal efficiency, and shortening the operation time.

[0031] In some preferred embodiments, at least one basket wire 100 is a metal wire 130. Metal wire 130 is a commonly used material for basket wire 100. Compared to the structural strength of gel wire 110 and magnetic wire 120, metal wire 130 has higher structural strength. Using metal wire 130 as basket wire 100 helps improve the overall structural strength of the basket body and facilitates control of the basket body's movement within the sheath 200. Furthermore, the basket body requires a certain density to avoid the basket structure at the distal end being too sparse. Therefore, metal wire 130 is used to fill the excessively wide gaps between gel wire 110 and magnetic wire 120 to ensure the basket structure's effectiveness in capturing stones.

[0032] For reference Figure 1 and Figure 2As shown, in some preferred embodiments, there are at least two gel filaments 110 and two magnetic guide wires 120, and along the circumference of the basket, the gel filaments 110 are located between the two magnetic guide wires 120, and the magnetic guide wires 120 are located between the two gel filaments 110. The magnetic guide wires 120 space the gel filaments 110 apart, so that the magnetic hydrogel output from the gel filaments 110 can cover a wider area; similarly, the magnetic guide wires 120 are also spaced apart by the gel filaments 110, thereby increasing the adsorption range of the magnetic guide wires 120.

[0033] With the same number of gel filaments 110 and magnetic wires 120, the gel filaments 110 and magnetic wires 120 are arranged alternately along the circumference of the basket, so that the distribution of magnetic hydrogel is more uniform and the adsorption range of magnetic wires 120 is also more uniform.

[0034] In some embodiments where the metal wire 130 also serves as the basket wire 100, adjacent metal wires 130 are separated by magnetic wires 120 or gel wires 110 to uniformly enhance the structural strength of the basket body. When the number of metal wires 130, gel wires 110, and magnetic wires 120 is the same, the gel wires 110, magnetic wires 120, and metal wires 130 are arranged sequentially and at intervals along the circumference of the basket body.

[0035] The outlet 111 on the gel filament 110 serves as the output port of the magnetic hydrogel. In some preferred embodiments, the outlet 111 faces the axial direction of the basket body. After the basket structure captures the stone and laser fragmentation occurs, most of the fragments are within the coverage area of ​​the basket structure. The outlet 111 facing the axial direction of the basket body ensures, to a certain extent, that the magnetic hydrogel can cover most of the fragments, which is beneficial for the magnetic hydrogel's encapsulation of the fragments. Furthermore, the outlet 111 facing the axial direction of the basket body facilitates the determination of the magnetic hydrogel's output range with the aid of an endoscope, making it easier to adjust the output range of the magnetic hydrogel to cover as much of the fragmented area as possible, thereby improving the stone removal rate.

[0036] Furthermore, the connection point between the distal end of the gel filament 110 and the magnetic guide wire 120 is located near the output port. The position of the gel filament 110 within the human body can be adjusted by controlling the position of the basket body. During adjustment, retracting the basket body is less difficult than extending it further outward. Since the outlet 111 is located distally, retracting the basket body adjusts the output range of the magnetic hydrogel from the outlet 111, facilitating intraoperative manipulation.

[0037] Furthermore, the gel filament 110 has two outlets 111, located on the same radial direction. One outlet 111 outputs magnetic hydrogel towards the axis of the basket, while the other outlet 111 outputs magnetic hydrogel away from the axis of the basket. The two gel filaments 110 work together to expand the coverage area of ​​the magnetic hydrogel in the radial direction of the basket, which is more effective in removing gravel located outside the basket and improves the gravel removal rate.

[0038] This application also provides a stone retrieval basket, which can be referred to. Figure 3 , Figure 5 , Figure 7 and Figure 9 As shown, the stone retrieval basket includes the basket body provided in the above embodiment, as well as a sheath 200 and a handle 300. The sheath 200 is connected to the handle 300, and the basket body is inserted into the sheath 200, allowing it to move within the sheath 200. Under the operator's control, the basket body can extend beyond the distal end of the sheath 200 under external force. Freed from the constraint of the sheath 200, the portion of the basket wire 100 located outside the distal end of the sheath 200 can deform to form a basket structure. (See reference...) Figure 4 As shown.

[0039] In some embodiments, the stone retrieval basket also includes a liquid storage chamber 510 and an electronic control board 400 disposed within the handle 300. The liquid storage chamber 510 is used to store magnetic hydrogel and is connected to the gel filament 110. The electronic control board 400 is connected to the magnetic guide wire 120 and is used to supply power to the magnetic guide wire 120 and control the use of the magnetic guide wire 120.

[0040] Both the liquid storage chamber 510 and the control board 400 are located inside the handle 300, eliminating the need for external liquid delivery channels and wiring, thus facilitating the use of the stone retrieval basket. Magnetic hydrogel is pre-stored in the liquid storage chamber 510 and can be directly output when needed. The control board 400 can power the magnetic guide wire 120 and control its alternating polarity, facilitating the adsorption of stones coated with magnetic hydrogel. Furthermore, the location of the liquid storage chamber 510 inside the handle 300 can shorten the delivery path of the magnetic hydrogel to some extent, reducing waste. The control board 400 can be connected to a power switch 900 (see reference). Figure 10 As shown, the power switch 900 is used to control the start and stop of the electronic control board 400.

[0041] Meanwhile, the connecting lines between the liquid storage chamber 510 and the gel filament 110, and between the electronic control board 400 and the magnetic guide wire 120, all need to be equipped with redundancy to accommodate the relative movement of the sheath tube 200 and the basket body.

[0042] In other embodiments of this application, the gel filament 110 can be connected to an external delivery pipe, allowing magnetic hydrogel to be directly fed into the gel filament 110 via the external delivery pipe. Alternatively, the magnetic wire 120 can be directly connected to an external control device, allowing the magnetic wire 120 to be powered and controlled via external control settings.

[0043] In some preferred embodiments, reference Figure 5 and Figure 6 As shown, the stone retrieval basket also includes an air bladder 500, which is located inside the handle 300. The air bladder 500 forms a liquid storage chamber 510 inside, and an operating component 600 is movably mounted on the outer wall of the handle 300. Under the action of external force, the operating component 600 moves along the axial direction of the handle 300 to squeeze the air bladder 500, thereby injecting magnetic hydrogel into the gel filament 110.

[0044] The interior of the airbag 500 serves as a liquid storage chamber 510. The airbag 500 can be compressed, reducing the size of the liquid storage chamber 510. The magnetic hydrogel is then output through the outlet 111 of the gel filament 110. The operating component 600 is located outside the handle 300 for easy operator control. By controlling the axial movement of the operating component 600 along the handle 300, the airbag 500 is compressed, thereby outputting the magnetic hydrogel.

[0045] The operating component 600 can be implemented in various ways. In some implementations, the operating component 600 is slidably connected to the handle 300 along its axial direction; part of the operating component 600 is located inside the handle 300, and part of the operating component 600 is located outside the handle 300; the airbag 500 is located on the movement path of the operating handle 300. The operator pushes the operating component 600 along the axial direction of the handle 300 to compress the airbag 500.

[0046] In other embodiments, reference may be made to Figures 5 to 10 As shown, the operating component 600 includes a knob 610 and a pressing part 620. The knob 610 is sleeved on the outside of the handle 300 and is limited to the handle 300 along the axial direction. The outer wall of the handle 300 is provided with an installation opening 310 along its axial direction. Part of the pressing part 620 is located inside the handle 300. Part of the pressing part 620 is movably disposed at the installation opening 310 and threadedly connected to the knob 610. The knob 610 can rotate under the action of external force to drive the pressing part 620 to move relative to the installation opening 310 along the axial direction of the handle 300. The airbag 500 is located on the movement path of the pressing part 620.

[0047] By utilizing the cooperation between the pressing part 620 and the mounting opening 310, the pressing part 620 is limited to the handle 300 in the circumferential direction. Rotating the knob 610 converts the rotational motion of the knob 610 into the linear motion of the pressing part 620, thereby driving the pressing part 620 to move to compress the airbag 500.

[0048] The movement of the pressure part 620 is controlled by rotating the knob 610. The position of the knob 610 on the handle 300 remains unchanged. When the operator operates the knob 610, the operator's grip can remain stable and will not move relative to the handle 300, which is conducive to accurate control of the stone retrieval basket.

[0049] In some preferred embodiments, both the airbag 500 and the pressure-retaining part 620 are annular structures. The airbag 500 is sleeved outside the sheath tube 200, which enlarges the size of the liquid storage cavity 510 inside the airbag 500, and the fit between the pressure-retaining part 620 and the airbag 500 is more uniform and stable.

[0050] In some embodiments, reference may be made to Figure 7 and Figure 8 As shown, a mounting channel 320 is provided inside the handle 300, and the sheath 200 passes through the mounting channel 320. A mounting groove 330 is provided on the inner wall of the mounting channel 320. The airbag 500 is located in the mounting groove 330, with the opening of the groove facing the operating component 600. The operating component 600 can extend into the mounting groove 330 under external force to compress the airbag 500. The groove wall of the mounting groove 330 can limit the position of the airbag 500, restricting its deformation. Simultaneously, the operating component 600 can contact the airbag 500 through the opening of the mounting groove 330 without affecting the compression fit between the operating component 600 and the airbag 500. When the operating component 600 compresses the airbag 500, the compression effect is better because the airbag 500's deformation is restricted by the groove wall of the mounting groove 330, resulting in higher output efficiency of the magnetic hydrogel in the reservoir 510.

[0051] In some embodiments of this application, the stone retrieval basket further includes a movable shaft 700, which passes through the handle 300 and is fixedly sleeved outside the sheath 200. A push button 800 is fixedly connected to the outer wall of the movable shaft 700, and the push button 800 is movably installed on the handle 300 housing along the axial direction of the handle 300. An electronic control board 400 is installed on the movable shaft 700.

[0052] The movement of the movable shaft 700 is controlled by moving the push button 800. When the basket body is inserted into the sheath tube 200 and the relative position of the sheath tube 200 and the basket body needs to be adjusted, it is easier to operate by moving the sheath tube 200 than by moving the basket body. Setting the movable shaft 700 to be fixed to the sheath tube 200 further improves the convenience of moving the sheath tube 200.

[0053] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A stone-collecting basket, characterized in that, Includes a basket body, the basket body includes at least two basket wires (100), the distal ends of the basket wires (100) are fixedly connected to each other, the proximal ends of the basket wires (100) extend toward the proximal end of the stone-collecting basket, and the distal portions of the basket wires (100) can deform in a direction away from the axis of the basket body to form a basket structure for capturing stones; Among them, at least one of the basket wires (100) is a gel wire (110), and at least one of the basket wires (100) is a magnetic wire (120). The gel wire (110) is hollow inside and has an inlet and an outlet (111) communicating with its interior. The inlet is used to inject magnetic hydrogel, and the outlet (111) is used to output magnetic hydrogel. The outlet (111) is located at the distal end of the gel wire (110). The stone retrieval basket also includes a sheath (200) and a handle (300). The sheath (200) is connected to the handle (300). The basket body is inserted into the sheath (200). The basket body can extend out of the distal end of the sheath (200) under external force. The portion of the basket wire (100) located outside the distal end of the sheath (200) can deform to form a basket structure. The stone retrieval basket also includes a liquid storage chamber (510) and an electronic control board (400) disposed in the handle (300). The liquid storage chamber (510) is used to store magnetic hydrogel. The liquid storage chamber (510) is connected to the gel filament (110). The electronic control board (400) is connected to the magnetic guide wire (120) and is used to supply power to the magnetic guide wire (120) and control the use of the magnetic guide wire (120). There are at least two gel filaments (110) and two magnetic wires (120) along the circumference of the basket body. The gel filament (110) is located between the two magnetic wires (120), and the magnetic wires (120) are located between the two gel filaments (110).

2. The stone-collecting basket according to claim 1, characterized in that, At least one of the basket wires (100) is a metal wire (130).

3. The stone-collecting basket according to claim 1, characterized in that, The liquid outlet (111) is positioned toward the axis of the basket body.

4. A stone-collecting basket according to claim 1, characterized in that, The stone retrieval basket also includes an air bladder (500), which is located inside the handle (300). The air bladder (500) forms the liquid storage chamber (510) inside. An operating component (600) is movably installed on the outer wall of the handle (300). Under the action of external force, the operating component (600) moves along the axial direction of the handle (300) to squeeze the air bladder (500), thereby injecting magnetic hydrogel into the gel filament (110).

5. A stone-collecting basket according to claim 4, characterized in that, The operating component (600) includes a knob (610) and a pressing part (620). The knob (610) is sleeved on the handle (300) and is limited to the handle (300) along the axial direction of the handle (300). The outer wall of the handle (300) is provided with an installation opening (310) along its axial direction. Part of the pressing part (620) is located inside the handle (300), and part of the pressing part (620) is movably disposed at the installation opening (310) and threadedly connected to the knob (610). The knob (610) can rotate under the action of external force to drive the pressing part (620) to move relative to the installation opening (310) along the axial direction of the handle (300). The airbag (500) is located on the movement path of the pressing part (620).

6. A stone-collecting basket according to claim 4, characterized in that, The handle (300) is provided with an installation channel (320), the sheath (200) passes through the installation channel (320), the inner wall of the installation channel (320) is provided with an installation groove (330), the airbag (500) is located in the installation groove (330), the opening of the installation groove (330) faces the operating component (600), and the operating component (600) can extend into the installation groove (330) under the action of external force to squeeze the airbag (500).

7. A stone-collecting basket according to claim 1, characterized in that, The stone-collecting basket also includes a movable shaft (700), which is inserted into the handle (300) and can move along its axial direction within the handle (300). The movable shaft (700) is fixedly sleeved outside the sheath (200). A push button (800) is fixedly connected to the outer wall of the movable shaft (700). The push button (800) is movably installed on the handle (300) housing along the axial direction of the handle (300). The electronic control board (400) is installed on the movable shaft (700).

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