Training method and device for uninterruptible power distribution network operations

Abstract

To provide a training method and device for uninterruptible power operation of a distribution network, the method comprising the steps of: carrying out the data recording through entering a construction site; recording the surrounding environment; carrying out the modeling of the construction site according to the same proportion through three-dimensional modeling software; building a live-line work tool and scene three-dimensional database; presenting various types of electric power devices and object models near operation points in a mode closest to real objects; and making operators have a relatively real feeling on operation scenes.SOLUTION: According to a training method and device for uninterruptible power operation of the distribution network, a three-dimensional model is drawn from a site and a nearby scene according to a proportion, related data such as a distribution line live-line operation principle, a standard, tools, research results and the like are collected and sorted, and the three-dimensional model made according to the proportion is presented in front of an operator through a VR technology; an operator can carry out training and data query through the virtual network environment, so that the operator is more familiar with and normative to the uninterruptible power operation of the distribution network.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to the technical field of simulation training devices, and in particular to a training method and device for uninterruptible power grid operation. [Background technology]

[0002] Uninterruptible operation of 10kV power distribution networks is a task that requires high levels of technology and safety. To ensure the normal operation of the power transmission and distribution network and the safe use of electricity by users, workers must have specialized knowledge and skills and strictly adhere to relevant work standards and safety measures. Training equipment for uninterruptible operation of power distribution networks is a mechanical device that provides simulation training for uninterruptible operation of power distribution networks.

[0003] Currently, commercially available training equipment for uninterruptible power distribution network operations requires participants to wear a helmet during simulation training and to watch VR presentations. This still has flaws, such as the wearer being more likely to fall because the visual situation differs from the real situation, and this needs to be improved. Summary of the Invention [Problem to be solved by the invention]

[0004] This section aims to outline some aspects and summaries of embodiments of the present invention and to describe some preferred embodiments. This section, the Abstract, and the title of the invention may be abbreviated or omitted so as not to obscure the purpose, and such abbreviations or omissions cannot be used to limit the scope of the present invention.

[0005] The present invention is proposed in view of the problem present in the conventional training method and device for uninterruptible power distribution network operations mentioned above, in which a helmet must be worn during training to perform a VR presentation, and the visual situation differs from the actual situation, making the wearer more likely to fall. [Means for solving the problem]

[0006] To solve the above technical problems, the present invention provides the following technical solution: enter the construction site to record data and the surrounding environment, use 3D modeling software to model the construction site at the same scale, and create a 3D database of live-line work tools and scenes, thereby presenting various power equipment and nearby objects in the most realistic way possible, allowing operators to gain a sense of the work scene; subsequently, collect and organize related materials such as the principles, standards, tools, and research results of live-line work on power distribution lines to create a digitized database of tools and project materials commonly used in live-line work, including the basic principles, standards, technical regulations, tool materials, and work procedures of live-line work; and express these materials using various means such as text, audio, video, and animation. The created 3D scene database is then presented to the operator via a helmet digital stereoscopic display, allowing the operator to train in uninterruptible power distribution network work through the virtual scene, while also being able to directly consult related materials such as the principles, standards, tools, and research results of live-line work on power distribution lines to learn about the work and conduct simulation training.

[0007] In a preferred embodiment of the training method for uninterruptible power distribution network operations according to the present invention, the on-site data and the recording of the surrounding environment are used to construct a model by proportionally representing the on-site and surrounding environments, thereby facilitating the acquisition of model data that is closest to the actual situation.

[0008] As a preferred embodiment of the training method for uninterruptible power distribution network operations according to the present invention, by collecting the above-mentioned principles and standards for live-line work on power distribution network lines, the on-site personnel to be trained can intuitively present the process to the trainees by consulting the materials and listening to the principles through video or audio, and the on-site trainers can also use virtual models to train in uninterruptible power distribution network operations.

[0009] The first embodiment of the present invention has the following beneficial effects: By drawing a proportional 3D model of the on-site and nearby scenes, and further collecting and organizing related materials such as the principles, standards, tools, and research results of live-line work on power distribution lines, and creating a digital database of tools and project materials commonly used in live-line work, the proportional 3D model can be presented to the operator using VR technology, allowing the operator to train and consult materials through a virtual network environment, becoming more familiar with and in line with the standards for uninterruptible work on power distribution networks.

[0010] Conventional training devices for uninterruptible power distribution network operations require participants to wear a helmet during training and watch VR presentations, which has the problem that the visual situation differs from the real situation, making the wearer more likely to fall.

[0011] In order to solve the above technical problems, the present invention provides the following technical solution: A training device for uninterruptible power distribution network operations, comprising: a support member including a support assembly and a connection assembly provided on the support assembly, and a protection member including a limiting assembly provided on the support assembly, a protection assembly provided on the limiting assembly, a pop-up assembly provided on the support assembly, and a protection assembly provided on the pop-up assembly.

[0012] In one preferred embodiment of the training device for uninterruptible power distribution network operations according to the present invention, the support assembly includes a support plate, a bottom plate, a counterweight attached to the support plate, a support rod attached to the counterweight, and a training chamber attached to the bottom plate.

[0013] In one preferred embodiment of the power distribution network uninterruptible operation training device of the present invention, the connection assembly includes a control bin provided at the rear of the training room, a connecting wire provided at the top of the control bin, and a connector and a display screen provided on the support rod.

[0014] In one preferred embodiment of the training device for uninterruptible power distribution network operations according to the present invention, the limiting assembly includes an arrangement groove provided at the top end of the training room, a rubber stopper provided on the inner wall of the arrangement groove, a sliding groove provided on the arrangement groove, and a sliding block provided in the sliding groove.

[0015] In one preferred embodiment of the training device for uninterruptible power distribution network operations according to the present invention, the protection assembly includes a moving groove provided in the training room, a moving plate provided in the moving groove, a protective pad provided on the moving plate, and an extrusion spring provided on the moving plate.

[0016] In one preferred embodiment of the training device for uninterruptible power distribution network operations according to the present invention, the pop-up assembly includes a guide roller provided on the moving groove, a pop-up spring provided on the sliding block, a towing rope provided on the sliding block, a connecting pole provided on the towing rope, a locking block provided on the connecting pole, and a locking groove provided on the moving plate.

[0017] In one preferred embodiment of the training device for uninterruptible power distribution network operations according to the present invention, the protective assembly includes a mounting plate provided on the arrangement groove, a storage case provided on the mounting plate, a mounting bracket provided in the storage case, a rotating rod provided on the mounting bracket, a coil spring and a rotating disk provided on the rotating rod, a limiting member provided on the rotating disk, and a protective member provided on the rotating rod. [Effects of the Invention]

[0018] The present invention has the following beneficial effects: The body and the rotating rod on the mounting bracket are connected via a protective member. When a person suddenly falls, the traction belt is suddenly pulled tight, causing the rotating disc to rotate rapidly and locking the limiting members together under the action of centrifugal force, so that the traction belt pulls the on-site operator to prevent him from falling. At the same time, when the traction belt is pulled tight, the sliding blocks move downwards, breaking through the restriction set by the rubber stoppers. The pop-up springs then urge the two sliding blocks to move toward the center, and the traction rope pulls the connecting pole, causing the locking blocks on the connecting pole to move into the locking grooves. The push-out springs then urge the moving plate inward, pushing out the protective pad and preventing the operator from falling and being hit. [Brief explanation of the drawings]

[0019] In order to more clearly describe the technical solutions of the embodiments of the present invention, the following will briefly describe the drawings used in the description of the embodiments. Of course, the drawings in the following description are only a part of the embodiments of the present invention, and those skilled in the art can further conceive of other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a schematic diagram of the overall structure of the power grid uninterruptible work training method and apparatus of the present invention; FIG. [Figure 2] 1 is a structural schematic diagram of a protection assembly of the power grid uninterruptible work training method and apparatus of the present invention; FIG. [Figure 3] 1 is a structural schematic diagram of a pop-up assembly of the power grid uninterruptible work training method and apparatus of the present invention; FIG. [Figure 4] 1 is a structural schematic diagram of a protection assembly of the power grid uninterruptible work training method and apparatus of the present invention; FIG. [Figure 5] 1 is a structural schematic diagram of the limiting member of the power distribution network uninterruptible work training method and apparatus of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to make the above objects, features and advantages of the present invention more clear and understandable, specific embodiments of the present invention will be described in detail below with reference to the drawings in the specification.

[0021] Although the following description sets forth numerous specific details to provide a thorough understanding of the present invention, the present invention may be embodied in other forms different from those described herein, and those skilled in the art will be able to implement similar applications without violating the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] References herein to "one embodiment" or "embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of "in one embodiment" in different places in this specification are not necessarily referring to the same embodiment, nor are they necessarily an exclusive stand-alone or alternative embodiment to other embodiments.

[0023] The present invention will now be described in detail with reference to schematic diagrams. However, when describing the embodiments of the present invention in detail, for the sake of convenience, cross-sectional views showing the structure of the device are not generally scaled to scale. The schematic diagrams are merely illustrative and do not limit the scope of protection of the present invention. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] Referring to FIG. 1, Example 1 is a first example of the present invention, which provides a training method for uninterruptible power supply operation in a power distribution network, including the following steps S1 to S3.

[0025] In S1, the construction site is entered and data and the surrounding environment are recorded. 3D modeling software is used to model the construction site to the same proportions, and a 3D database of live-line work jigs and scenes is created. This allows the operator to present models of various power equipment and objects in the workplace in the most realistic way possible, allowing them to gain a real sense of the work scene.

[0026] Preferably, the data collection of the construction site and recording of the surrounding environment will provide corresponding data for subsequent 3D modeling and facilitate the construction of the 3D model; by creating live-line work jigs in the virtual building model, operators can train and become more proficient in uninterruptible work in the virtual world.

[0027] In S2, by collecting and organizing related materials such as the principles, standards, tools, and research results of live-line work for power distribution lines, a digital database of tools and project materials commonly used in live-line work, including the basic principles, standards, technical regulations, tool materials, and work procedures of live-line work, is created, and the above materials are expressed in various ways such as text, audio, video, and animation.

[0028] Preferably, the purpose of collecting the principles of power distribution line work and related materials is mainly to facilitate trainees' inquiries about related knowledge, so that they can complete inquiries about materials and instructions on how to use related tools without logging out.

[0029] In S3, the created 3D scene database is presented to the operator via a helmet digital stereoscopic display, allowing the operator to train in uninterruptible power distribution network operations through the virtual scene. At the same time, the operator can also directly refer to related materials such as the principles, standards, tools, and research results of live-line operations on power distribution lines to learn about the operations and conduct simulation training.

[0030] Preferably, a helmet digital stereoscopic display presents a virtual three-dimensional scene in front of the operator, who then uses the controller to perform uninterruptible operations in the virtual world and to access related materials, thereby becoming more familiar with and adapting to uninterruptible operations.

[0031] Furthermore, the recording of the data of the site and the surrounding environment is intended to facilitate the proportional construction of the site and the surrounding environment during model construction, thereby enabling the acquisition of model data that is closest to the actual scene.

[0032] Preferably, the surrounding scene is created proportionally to make the virtual world closer to the real scene, allowing the user to experience the real working sensation of immersive live-line work, thereby enhancing the training effect.

[0033] Furthermore, by collecting the principles and standards for live-line work on power distribution lines, on-site personnel to be trained can intuitively present the process to trainees by consulting the materials and watching videos and audios explaining the principles, and on-site trainers can also use virtual models to train the work.

[0034] Preferably, the principles and standards of live-line work on power grid lines are registered in the helmet digital stereoscopic display, so that when the information needs to be consulted, it can be consulted on the helmet digital stereoscopic display without deriving the virtual world.

[0035] As a result, the on-site and nearby scenes are depicted as proportional 3D models, and related materials such as the principles, standards, tools, and research results of live-line work on power distribution lines are collected and organized, and a digital database of tools and project materials commonly used in live-line work is created.The proportional 3D models can then be presented to operators using VR technology, allowing them to train and consult materials through a virtual network environment, becoming more familiar with uninterruptible power distribution network work and complying with standards.

[0036] 1 to 3, Example 2 is a second embodiment of the present invention, and provides a training device for uninterruptible power supply operations on a power distribution network, including a support member 100 including a support assembly 101 and a connection assembly 102 provided on the support assembly 101, and a protection member 200 including a limiting assembly 201 provided on the support assembly 101, a protection assembly 202 provided on the limiting assembly 201, a pop-up assembly 203 provided on the support assembly 101, and a protection assembly 204 provided on the pop-up assembly 203.

[0037] Among them, the support assembly 101 is used to support the entire device, the connection assembly 102 is used to connect the virtual world and the external display screen 102d, the limiting assembly 201 is used to limit the position of the sliding block 201d, the protective assembly 202 is used to protect the user in the training room 101e and prevent damage caused by collisions, the pop-up assembly 203 is used to control the pop-up of the protective assembly 202, and the protective assembly 204 is used to protect the user from falling.

[0038] Preferably, when the user is about to fall, the protective action of the protection assembly 204 immediately pulls the user to prevent the user from falling, and at the same time, the limiting assembly 201 drives the pop-up assembly 203 to operate, whereby the protection assembly 202 pops up from inside the wall to protect the user from being hit.

[0039] Furthermore, the support assembly 101 includes a support plate 101a, a bottom plate 101b, a counterweight 101c provided on the support plate 101a, a support rod 101d provided on the counterweight 101c, and an exercise chamber 101e provided on the bottom plate 101b.

[0040] The support plate 101a is used to support the counterweight 101c, the counterweight 101c is used to connect the support rod 101d and the support plate 101a, and the bottom plate 101b is used to support the wall of the training room.

[0041] Furthermore, the connection assembly 102 includes a control bin 102a provided at the rear of the training room 101e, a connection line 102b provided at the upper side of the control bin 102a, and a connector 102c and a display screen 102d provided on the support rod 101d.

[0042] Among them, the control pin 102a is used to control the helmet digital stereoscopic display in the training room 101e, and the connection line 102b is used to connect the control pin 102a with the connector 102c on the display screen 102d.

[0043] Preferably, the control bin 102a is connected to the display screen 102d by the connection line 102b and the connector 102c, so that the operator's operations in the virtual world can be effectively and intuitively presented on the display screen 102d, facilitating external learning.

[0044] As described above, the control bin 102a is connected to the display screen 102d via the connection line 102b and the connector 102c, so that the operator's operations in the virtual world are effectively and intuitively presented on the display screen 102d, facilitating external learning. Also, when the user is about to fall, the protective action of the protective assembly 204 immediately pulls the user to prevent him from falling, and at the same time, the limiting assembly 201 drives the pop-up assembly 203 to operate, so that the protective assembly 202 pops up from inside the wall and protects the user from being hit.

[0045] Referring to Figures 3 to 5, Example 3 is a third example of the present invention, in which the restriction assembly 201 includes an arrangement groove 201a provided at the top end of the training room 101e, a rubber stopper 201b provided on the inner wall of the arrangement groove 201a, a sliding groove 201c provided on the arrangement groove 201a, and a sliding block 201d provided in the sliding groove 201c.

[0046] Among them, the placement groove 201a is provided for placing the rubber stopper 201b, the sliding groove 201c is provided for limiting the movement trajectory of the sliding block 201d, and the limiting spring 204g-3 is provided for limiting the movement of the sliding block 201d.

[0047] Preferably, the two sliding plates are pushed out to both sides by the mounting plate 204a in the placement groove 201a to open them, thereby pressing the limiting spring 204g-3, and the mounting position is further limited by the rubber stopper 201b, so that they can be positioned at the upper side in the placement groove 201a without being subjected to external force.

[0048] Furthermore, the protective assembly 202 includes a moving groove 202a provided in the training room 101e, a moving plate 202b provided in the moving groove 202a, a protective pad 202c provided on the moving plate 202b, and an extrusion spring 202d provided on the moving plate 202b.

[0049] Among them, the pushing spring 202d is used to push the movable plate 202b, thereby moving the movable plate 202b into the movable groove 202a and driving the protective pad 202c to be exposed from the wall, thereby protecting the user inside from bumps.

[0050] Furthermore, the pop-up assembly 203 includes a guide roller 203a provided on the moving groove 202a, a pop-up spring 203b provided on the sliding block 201d, a towing rope 203c provided on the sliding block 201d, a connecting pillar 203d provided on the towing rope 203c, a locking block 203e provided on the connecting pillar 203d, and a locking groove 203f provided on the moving plate 202b.

[0051] Here, the connecting pillar 203d and the sliding block 201d are connected by the installation of the traction rope 203c, the guide roller 203a is used to change the direction of the traction rope 203c, the locking block 203e on the connecting pillar 203d is used to lock the moving plate 202b, and each moving plate 202b is provided with a locking groove 203f.

[0052] Preferably, the traction rope 203c can drive the connecting pole 203d to move upward when the sliding block 201d moves inward, and when the connecting pole 203d moves upward, the locking blocks 203e on the connecting pole 203d will respectively enter into the corresponding locking grooves 203f, so that the moving plate 202b is pushed inward by the pushing spring 202d, and the protective pad 202c can protect the user inside.

[0053] Furthermore, the protective assembly 204 includes a mounting plate 204a provided on the placement groove 201a, a storage case 204b provided on the mounting plate 204a, a mounting bracket 204c provided in the storage case 204b, a rotating rod 204d provided on the mounting bracket 204c, a coil spring 204e and a rotating disk 204f provided on the rotating rod 204d, a limiting member 204g provided on the rotating disk 204f, and a protective member 204h provided on the rotating rod 204d.

[0054] The limiting member 204g includes a limiting groove 204g-1 formed in the rotating disk 204f, a moving rod 204g-2 provided in the limiting groove 204g-1, a limiting spring 204g-3 provided on the moving rod 204g-2, a pawl 204g-4 provided on the moving rod 204g-2, and a ratchet 204g-5 on the mounting bracket 204c.

[0055] The protective member 204h is also provided with a traction belt 204h-1 on the rotation rod 204d, a main plate 204h-2 on the traction belt 204h-1, an attachment belt 204h-3 on the main plate 204h-2, and a fastener 204h-4 on the attachment belt 204h-3.

[0056] Preferably, the mounting belt 204h-3 is fixed to the body by the arrangement of the fastener 204h-4 and the mounting belt 204h-3, and further the protective assembly 204 and the user are connected by the arrangement of the traction belt 204h-1 and the rotating rod 204d, when the body and the rotating rod 204d on the mounting bracket 204c are connected, if the person suddenly falls, the traction belt 204h-1 will be pulled tightly suddenly, causing the rotating disc 204f to rotate quickly, and the pawl 204g-4 in the limiting member 204g will move outward due to the action of centrifugal force and lock with the external ratchet 204g-5, thereby the traction belt 204h-1 will pull the on-site operator to prevent him from falling.

[0057] As a result of the above, the mounting belt 204h-3 is fixed to the body by the arrangement of the fastener 204h-4 and the mounting belt 204h-3, and further, the protective assembly 204 and the user are connected by the arrangement of the traction belt 204h-1 and the rotating rod 204d. When the body and the rotating rod 204d on the mounting bracket 204c are connected, if a person suddenly falls, the traction belt 204h-1 will be suddenly pulled tightly, causing the rotating disc 204f to rotate quickly, and the pawl 204g-4 in the limiting member 204g will move outward due to the action of centrifugal force and lock with the external ratchet 204g-5, thereby the traction belt 204h-1 will pull the on-site operator to prevent him from falling. In addition, as the traction belt 204h-1 is pulled tight, the sliding block 201d moves downward to break through the restriction imposed by the rubber stopper 201b, so that the two sliding blocks 201d are pushed by the pop-up spring 203b to move to the center, and the traction rope 203c pulls the connecting pole 203d, causing the locking block 203e on the connecting pole 203d to advance into the locking groove 203f. Subsequently, the push-out spring 202d pushes the moving plate 202b to move inward, thereby pushing out the protective pad 202c and preventing the operator from falling and being hit.

[0058] The remaining structure is similar to that of the second embodiment.

[0059] It is important to note that the structures and arrangements of the present application as shown in several different exemplary embodiments are merely illustrative. While the disclosure herein details only a few embodiments, those reading this disclosure will readily appreciate that numerous modifications (e.g., changes in the dimensions, scale, structure, shape, proportions, and parameter values ​​(e.g., temperature, pressure, etc.) of various elements, mounting arrangements, use of materials, color, orientation, etc.) are possible, provided the novel teachings and advantages do not substantially depart from the subject matter described herein. For example, elements shown as being unitary may be comprised of multiple parts or elements, the location of elements may be reversed or otherwise altered, and the nature, number, or location of separate elements may be varied or changed. Accordingly, all such modifications are intended to be within the scope of the present invention. The order or sequence of any process or method steps may be varied or reordered based on alternative embodiments. In the claims, any clause relating to "apparatus having a function" is intended to include structures that perform the function described herein, including not only structurally equivalent, but also equivalent structures. The design, operation, and arrangement of the exemplary embodiments may be substituted, modified, changed, and omitted without departing from the scope of the present invention. Therefore, the present invention is not limited to a specific embodiment, but can be extended to various forms of modifications that fall within the scope of the appended claims. Also, in order to briefly describe exemplary embodiments, it is not necessary to describe all features of an actual embodiment (i.e., those features that are not relevant to the best mode of carrying out the invention currently contemplated or those features that are not relevant to the implementation of the invention).

[0060] It should be noted that the above embodiments are only for illustrating rather than limiting the technical solutions of the present invention, and the present invention has been described in detail with reference to the preferred embodiments. However, it is understandable for those skilled in the art that modifications or equivalent substitutions of the technical solutions of the present invention may be made without departing from the spirit and scope of the technical solutions of the present invention, and all of them fall within the scope of the claims of the present invention.

Claims

1. A training device for uninterruptible power supply operations on a power distribution network, which is applied to a training method for uninterruptible power supply operations on a power distribution network, including presenting a three-dimensional model to an operator using VR technology, so that the operator can train in uninterruptible power supply operations on a power distribution network through a virtual scene, a support member (100) including a support assembly (101) and a connection assembly (102) provided on the support assembly (101); a protection element (200) including a limiting assembly (201) provided on the support assembly (101), a protection assembly (202) provided on the limiting assembly (201), a pop-up assembly (203) provided on the support assembly (101), and a protection assembly (204) provided on the pop-up assembly (203).

2. 2. The training device for uninterruptible power distribution network operations according to claim 1, wherein the support assembly (101) comprises: a support plate (101a), a bottom plate (101b), a counterweight (101c) mounted on the support plate (101a), a support rod (101d) mounted on the counterweight (101c), and a training room (101e) mounted on the bottom plate (101b).

3. 3. The training device for uninterruptible power supply operation of a power distribution network according to claim 2, wherein the connection assembly (102) includes: a control bin (102a) provided at the rear side of the training room (101e); a connecting line (102b) provided at the upper side of the control bin (102a); and a connector (102c) and a display screen (102d) provided on the support rod (101d).

4. 4. The training device for uninterruptible power supply work on a power distribution network according to claim 3, characterized in that the limiting assembly (201) includes: a positioning groove (201a) provided at the top end of the training room (101e), a rubber stopper (201b) provided on the inner wall of the positioning groove (201a), a sliding groove (201c) provided on the positioning groove (201a), and a sliding block (201d) provided in the sliding groove (201c).

5. 5. The training device for uninterruptible power supply work on a power distribution network according to claim 4, wherein the protection assembly (202) includes: a moving groove (202a) provided in the training room (101e), a moving plate (202b) provided in the moving groove (202a), a protective pad (202c) provided on the moving plate (202b), and a push-out spring (202d) provided on the moving plate (202b).

6. 6. The training device for uninterruptible power supply work on a power distribution network according to claim 5, wherein the pop-up assembly (203) includes: a guide roller (203a) provided on the moving groove (202a); a pop-up spring (203b) provided on the sliding block (201d); a towing rope (203c) provided on the sliding block (201d); a connecting pole (203d) provided on the towing rope (203c); a locking block (203e) provided on the connecting pole (203d); and a locking groove (203f) provided on the moving plate (202b).

7. 7. The training device for uninterruptible power distribution network operations according to claim 6, wherein the protection assembly (204) includes: a mounting plate (204a) provided on the arrangement groove (201a); a storage case (204b) provided on the mounting plate (204a); a mounting bracket (204c) provided in the storage case (204b); a rotating rod (204d) provided on the mounting bracket (204c); a coil spring (204e) and a rotating disk (204f) provided on the rotating rod (204d); a limiting member (204g) provided on the rotating disk (204f); and a protective member (204h) provided on the rotating rod (204d).

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