A compact gasoline generator set

Abstract

The present invention provides a compact gasoline generator set, which relates to the technical field of generators, and includes a generator body and a protective frame, on which a protective component is provided; the protective frame is arranged outside the generator body, which can buffer and absorb energy in the event of an accidental fall, thereby preventing core components from being directly impacted and damaged; the two ends of the protective component are relatively close to each other so that the protective component is in a retracted state, so as to open the protective frame, which is suitable for dry and windless environments; the two ends of the protective component are relatively far apart so that the protective component is in a stretched state, so as to enclose the protective frame, which is suitable for high-humidity environments and reduces short-circuit faults. When used in a windy environment, it can also cooperate with the protective frame to prevent objects from hitting the generator body, thereby improving the protection capability of the generator body.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, in particular to a compact gasoline generator set. Background Art

[0002] Gasoline generators typically consist of a power unit and a generator unit. The power unit is the key component that converts chemical energy into mechanical energy. It generates kinetic energy by burning fuel in the cylinder, driving the piston to reciprocate. This in turn drives the crankshaft through the connecting rod to generate power, which in turn drives the rotor to rotate, converting mechanical energy into electrical energy through the principle of electromagnetic induction. Gasoline generators are widely used in various fields due to their portability and emergency response capabilities. For example, when camping outdoors, gasoline generators can provide power for lighting and cooking utensils in the tent. At construction sites, they can power various power tools to avoid disrupting construction progress. In the event of a natural disaster or accident, gasoline generators can also provide temporary power supply to the affected area, ensuring the smooth progress of rescue operations.

[0003] Existing gasoline generators often use open-frame structures, which lack protection for core components. For example, in the event of an accidental drop or impact in strong winds, the lack of a buffering, energy-absorbing structure can directly impact core components, causing damage to the generator. These generators are also prone to short-circuit failures when used in high-humidity environments.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0005] Based on this, it is necessary to provide a compact gasoline generator set to address the problems existing in current gasoline generators.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A compact gasoline generator set includes a generator body and a protective frame arranged outside the generator body. The protective frame is provided with a protective assembly. One end of the protective assembly can move between a first position and a second position relative to the other end thereof. When in the first position, the protective assembly is in a retracted state to open the protective frame. When in the second position, the protective assembly is in a stretched state to enclose the protective frame.

[0008] Furthermore, relative to the protection frame, one end of the protection component is a free end, and the other end is a fixed end, and the free end can move between the first position and the second position relative to the fixed end.

[0009] Furthermore, the protective assembly includes a plurality of blocking members and a plurality of elastic members, and adjacent blocking members are connected by the elastic members. The blocking members corresponding to the free ends can move between the first position and the second position along a preset path, and the adjacent blocking members are driven to move along the preset path by the elastic members.

[0010] Furthermore, a control member is provided on the protective frame, and the control member is located between the first position and the second position. The control member is used to prevent the blocking member from moving along the preset path, and the blocking member located between the control member and the second position has a blocking effect on the protective frame.

[0011] Furthermore, the number of the blocking members located between the control member and the second position is A, A is a positive integer, and the degree of enclosure of the protective frame is positively correlated with the size of A.

[0012] Furthermore, the blocking member is a cavity structure, and the cavity is in a negative pressure state. The blocking member is provided with a plurality of side holes communicating with the cavity.

[0013] Furthermore, the side hole is opened on a side of the blocking member away from the generator body.

[0014] Furthermore, a locking member is provided on the protective frame, and the locking member is used to keep the blocking member corresponding to the free end in the second position.

[0015] Furthermore, a side of the blocking member close to the generator body has a silencer.

[0016] Furthermore, the protective frame includes an inner frame and an outer frame, the generator body is mounted on the inner frame, and a plurality of buffer members are provided between the inner frame and the outer frame.

[0017] The beneficial effects of the present invention are as follows: the present invention sets a protective frame outside the generator body, which can buffer and absorb energy in the event of an accidental fall, and prevent the core components from being directly impacted and damaged; the two ends of the protective component are relatively close to each other so that the protective component is in a retracted state, so as to open the protective frame, which is suitable for dry and windless environments; the two ends of the protective component are relatively far away from each other so that the protective component is in a stretched state, so as to enclose the protective frame, which is suitable for high-humidity environments and reduces short-circuit failures. When used in a windy environment, it can also cooperate with the protective frame to prevent objects from hitting the generator body, thereby improving the protection capability of the generator body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An axonometric view of a compact gasoline generator set provided by an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of a medium-compact gasoline generator set without the generator body;

[0020] Figure 3 for Figure 2 Front view of

[0021] Figure 4 for Figure 3 AA-direction cross-sectional view;

[0022] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0023] Figure 6 for Figure 1 A schematic diagram of one state of a medium-compact gasoline generator set;

[0024] Figure 7 for Figure 6 Front view of a mid-compact gasoline generator set;

[0025] Figure 8 for Figure 7 Cross-sectional view of the medium-compact gasoline generator set in the CC direction;

[0026] Figure 9 for Figure 7 Schematic diagram of the connection structure between the protective rod and the blocking member of a medium-compact gasoline generator set;

[0027] Figure 10 for Figure 9 DD-direction cross-sectional view;

[0028] Figure 11 for Figure 9 Exploded view of parts;

[0029] Figure 12 for Figure 11 A partial enlarged view of point E in the middle;

[0030] Figure 13 for Figure 11 A partial enlarged view of point F in the middle;

[0031] Figure 14 for Figure 6 Schematic diagram of another state of the medium and compact gasoline generator set;

[0032] Figure 15 for Figure 5 Structural deformation diagram;

[0033] Figure 16 for Figure 15 Schematic diagram of the conveyor belt structure.

[0034] in:

[0035] 100. Generator body;

[0036] 200, protective frame; 201, box body; 202, inner frame; 203, outer frame; 204, buffer; 205, support frame; 206, protective rod;

[0037] 300, protective component; 301, blocking member; 302, elastic member; 303, slider; 304, slide groove; 305, conveyor belt; 306, control member; 307, return spring; 308, side hole; 309, connecting hole; 310, end hole; 311, bending sealing film; 312, locking member; 313, connecting plate; 314, silencer; 315, suction pump. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] like Figures 1 to 16As shown, an embodiment of the present invention provides a compact gasoline generator set, including a generator body 100 and a protective frame 200 arranged outside the generator body 100, a protective component 300 is provided on the protective frame 200, and one end of the protective component 300 can move between a first position and a second position relative to the other end thereof. When in the first position, the protective component 300 is in a retracted state to open the protective frame 200, and when in the second position, the protective component 300 is in a stretched state to enclose the protective frame 200.

[0042] A protective frame 200 is provided outside the generator body 100, which can buffer and absorb energy in the event of an accidental fall, thereby preventing core components from being directly impacted and damaged; the two ends of the protective component 300 are relatively close to each other so that the protective component 300 is in a retracted state, so as to open the protective frame 200, which is suitable for dry and windless environments; the two ends of the protective component 300 are relatively far apart so that the protective component 300 is in a stretched state, so as to enclose the protective frame 200, which is suitable for high-humidity environments and reduces short-circuit failures. When used in a windy environment, it can also cooperate with the protective frame 200 to prevent objects from hitting the generator body 100, thereby enhancing the protection capability of the generator body 100.

[0043] Among them, the protective frame 200 can be a cylindrical frame structure or other shapes, preferably a rectangular or cubic frame structure composed of multiple protective rods 206 perpendicular to each other, which has six open surfaces, is more suitable for the outer contour shape of the generator body 100, reduces the occupied space, and obtains a more compact structure.

[0044] The protective rod 206 is provided with a protective assembly 300. When the protective assembly 300 is in a retracted state, all openings of the protective frame 200 are opened. When the protective assembly 300 is stretched from the protective rod 206 to the opposite protective rod 206, the opening is blocked. To simplify the structure, a box body 201 is provided on the upper and lower openings of the protective frame 200 to continuously block the upper and lower openings. Each box body 201 has two chambers capable of storing two protective assemblies 300. The openings of the two chambers face opposite directions, allowing the two protective assemblies 300 to be stretched in opposite directions. Correspondingly, the stretching directions of the protective assemblies 300 in the two box bodies 201 are perpendicular to each other, so as to block the four lateral openings of the protective frame 200.

[0045] The first position is the position of one end of the protective component 300 when the protective component 300 is in a contracted state, and the second position is the position of one end of the protective component 300 when the protective component 300 is in a stretched state.

[0046] Preferably, relative to the protection frame 200 , one end of the protection assembly 300 is a free end, and the other end is a fixed end, and the free end can move between a first position and a second position relative to the fixed end.

[0047] One end of the protection component 300 is fixed and the other end is free, so it only needs to control one end of the protection component 300 to make it shrink or stretch, which is easy to operate.

[0048] Optionally, the middle of the protection component 300 is fixed to the protection frame 200, and both ends of the protection component 300 are in a free state.

[0049] Preferably, the protective assembly 300 includes a plurality of blocking members 301 and a plurality of elastic members 302, and adjacent blocking members 301 are connected by elastic members 302. The blocking members 301 corresponding to the free ends can move between a first position and a second position along a preset path, and drive adjacent blocking members 301 to move along the preset path through the elastic members 302.

[0050] The elastic member 302 can keep adjacent blocking members 301 connected, and the distance between adjacent blocking members 301 can be elastically changed, so that the overall expansion and contraction of the protective assembly 300 has a certain elasticity.

[0051] Among them, see Figures 10 to 13 The blocking member 301 is a rod with a slider 303 at its end. The elastic member 302 is positioned between the sliders 303 of two adjacent blocking members 301. When the protective assembly 300 is in the extended state, a certain distance exists between the two adjacent blocking members 301 to prevent heat dissipation from the generator body 100. The vertically arranged protective rod 206 is provided with a slide groove 304 for the slider 303 to slide. The slide groove 304 communicates with the chamber within the housing 201 to form a predetermined path, allowing the blocking member 301 to move from the chamber within the housing 201 into the slide groove 304, i.e., along the predetermined path.

[0052] Among them, see Figure 4 、 Figure 5 The blocking member 301 corresponding to the fixed end can be directly fixed to the box body 201. The blocking member 301 corresponding to the free end can be manually pulled to move along the preset path until it blocks the protective frame 200. The elastic member 302 is now a tension spring to pull the adjacent blocking member 301 to move along the preset path.

[0053] As a structural variant, see Figure 15 、 Figure 16The chamber within the box body 201 may also be provided with a conveyor belt 305. Multiple guide rollers are evenly spaced on the inner side of the conveyor belt 305, one of which is driven by a motor. When the conveyor belt 305 is in operation, it automatically moves the blocking member 301 along the chamber within the box body 201 without manual operation. In this case, the elastic member 302 is a compression spring. Under the action of the elastic member 302, the blocking member 301 moves along a predetermined path until it reaches the protective frame 200.

[0054] Optionally, the protective component 300 can also adopt a structure similar to shutters, in which case each blocking member 301 is a strip blade, multiple blades are arranged in parallel and the swing angle of the blade is controlled by a pull rope to change the opening and closing degree of the opening surface of the protective frame 200.

[0055] Optionally, the blocking member 301 may not move along the preset path, but instead the blocking member 301 corresponding to the free end is pulled to stretch the protective component 300 as a whole to a certain length, and then the blocking member 301 corresponding to the free end is placed in the second position, which is similar to the process of using plastic wrap: pulling the end of the plastic wrap to pull out a length of plastic wrap, and then pulling the end to cover the plastic wrap on the food.

[0056] Preferably, a control member 306 is provided on the protective frame 200, and the control member 306 is located between the first position and the second position. The control member 306 is used to prevent the blocking member 301 from moving along a preset path. The blocking member 301 located between the control member 306 and the second position has a blocking effect on the protective frame 200.

[0057] Among them, see Figure 4 、 Figure 8 A control member 306 is slidably mounted on the housing 201. A return spring 307 is disposed between the control member 306 and the housing 201, causing the control member 306 to slide into the housing 201. When the control member 306 slides into the housing 201, the control member 306 is positioned between two adjacent blocking members 301, thereby preventing the blocking members 301 from moving between the chamber in the housing 201 and the chute 304. The sliding of the control member 306 can be controlled manually, or an electric push rod or other structure can be provided to drive the sliding of the control member 306, and a corresponding controller can be provided.

[0058] Optionally, the protective frame 200 is also provided with a processor, and sensors such as a three-axis accelerometer or a gyroscope. When the sensor detects an accidental fall, the processor first causes the control member 306 to slide out of the chamber in the box body 201, that is, cancels the blocking effect on the blocking member 301. The processor then controls the motor of the conveyor belt 305 to rotate, and drives the conveyor belt 305 to run through the guide roller, so as to drive the blocking member 301 to move from the chamber in the box body 201 to the slide groove 304 until it encloses the protective frame 200.

[0059] Preferably, the number of blocking members 301 located between the control member 306 and the second position is A, where A is a positive integer, and the degree of enclosure of the protective frame 200 is positively correlated with the size of A.

[0060] The control element 306 prevents the blocking elements 301 from moving along a preset path, thereby changing the number of blocking elements 301 that enclose the protective frame 200. The larger the number A, the smaller the spacing between the blocking elements 301, and the greater the degree of enclosure of the protective frame 200, thereby freely changing the degree of enclosure of the protective frame 200. For example, when A is 0, the protective frame 200 is in a fully open state, and the generator body 100 is suitable for dry environments. When A is greater than 0 but less than the total number of blocking elements 301, the protective frame 200 is between the fully open state and the fully enclosed state, and the generator body 100 is suitable for high-humidity environments, while also cooperating with the protective frame 200 to prevent objects from hitting the generator body 100. When A is sufficiently large but still less than the total number of blocking elements 301, the protective frame 200 is in a fully enclosed state, and the gasoline generator is shut down to provide comprehensive protection.

[0061] When the protective frame 200 is in the fully open state, the opening surface of the protective frame 200 can dissipate heat for the generator body 100; when the protective frame 200 is between the fully open state and the fully enclosed state, there is a gap between adjacent blocking members 301, which can also dissipate heat for the generator body 100.

[0062] A sensing module may be provided to detect the ambient wind force and humidity in real time, so that the number of blocking members 301 that generate the enclosure effect may be adjusted in real time, that is, the gap between adjacent blocking members 301 may be adjusted.

[0063] Preferably, the blocking member 301 is a cavity structure, and the cavity is in a negative pressure state. The blocking member 301 is provided with a plurality of side holes 308 communicating with the cavity.

[0064] The negative pressure environment in the cavity generates suction for rainwater, preventing rainwater from entering the protective frame 200 and falling on the generator body 100, thereby reducing short circuit failures. At the same time, the rainwater sucked into the cavity can also improve the heat dissipation effect of the generator body 100.

[0065] The protective rod 206 also has a hollow structure. A connecting hole 309 is provided on the side of the protective rod 206 near the blocking member 301. An end hole 310 is provided at the end of the blocking member 301 and on the slider 303. Thus, the cavity within the blocking member 301 communicates with the cavity of the protective rod 206 through the end hole 310 and the connecting hole 309. Furthermore, a flexible sealing film 311 is provided between the two sliders 303, and its width remains unchanged during expansion and contraction. When a gap exists between adjacent blocking members 301, the flexible sealing film 311 can also block the connecting hole 309, thereby maintaining a negative pressure environment.

[0066] The protective frame 200 is provided with a suction pump 315, which is equipped with a corresponding power supply and controller for start and stop control. The suction end of the suction pump 315 is connected to the chamber within the box body 201, generating a negative pressure in the chamber within the box body 201, thereby causing the cavity within the barrier 301 and the cavity of the protective rod 206 to be in a negative pressure state. In addition, rainwater drawn into the cavity of the barrier 301 and the cavities of the protective rod 206 effectively dissipates heat from the generator body 100. During the heat dissipation process, the rainwater gradually evaporates. After the rainwater evaporates due to long-term continuous operation of the generator body 100, the suction pump 315 can be used to add additional water or a cooling source to the cavity to ensure heat dissipation from the generator body 100. Of course, a separate sensor can also be provided to monitor the operating temperature of the generator body 100 in real time to control whether additional water or a cooling source is added to the cavity by the suction pump 315.

[0067] Preferably, see Figure 10 、 Figure 12 、 Figure 13 The side hole 308 is opened on the side of the blocking member 301 away from the generator body 100 .

[0068] When the protection frame 200 is between the fully open state and the fully enclosed state, the rainwater is sucked into the cavity of the blocking member 301 through the side holes 308 on the outside.

[0069] Optionally, the side hole 308 may also be located on the upper side of the blocking member 301 .

[0070] Preferably, see Figure 4 、 Figure 8 A locking member 312 is provided on the protection frame 200, and the locking member 312 is used to keep the blocking member 301 corresponding to the free end in the second position.

[0071] The locking member 312 can be configured as follows: the locking member 312 is attached to the corresponding blocking member 301 at the free end via a connecting plate 313. The locking member 312 can also slide along the sliding groove 304 on the protective rod 206. Pulling the locking member 312 can move the corresponding blocking member 301 at the free end along a predetermined path. A locking structure is provided between the locking member 312 and the protective rod 206. The locking structure can be a conventional magnetic or snap-fit ​​structure to lock the locking member 312 in place, maintaining the corresponding blocking member 301 at the second position.

[0072] Preferably, see Figure 10 The blocking member 301 has a muffler 314 on one side close to the generator body 100 .

[0073] The silencer 314 may be honeycomb-shaped, or a silencer coating may be applied on the side of the blocking member 301 close to the generator body 100 , or the side of the blocking member 301 close to the generator body 100 may be made of a silencer material to absorb the noise generated by the generator body 100 .

[0074] Preferably, see Figure 1 、 Figure 2 The protective frame 200 includes an inner frame 202 and an outer frame 203. The generator body 100 is installed on the inner frame 202. A plurality of buffer members 204 are provided between the inner frame 202 and the outer frame 203 to enhance the strength and buffering energy absorption effect of the protective frame 200, and further prevent the core components from being directly impacted and damaged.

[0075] The outer frame 203 is composed of a plurality of protective rods 206. The buffer member 204 can be made of TPU, modified nylon, or rubber. A support frame 205 is provided at the bottom of the outer frame 203 to ensure that the generator body 100 is at a certain distance from the ground.

[0076] When the present invention is in use, a protective frame 200 consisting of an outer frame 203, a buffer 204 and an inner frame 202 is provided outside the generator body 100, which can buffer and absorb energy in the event of an accidental fall, thereby preventing core components from being directly impacted and damaged.

[0077] When used in a high-humidity environment, the two ends of the protective assembly 300 are relatively separated so that the protective assembly 300 is in a stretched state to enclose the protective frame 200. Specifically, the control member 306 is first slid out of the box body 201 to cancel the blocking effect on the blocking member 301. Then, the locking member 312 is pulled. It drives the blocking member 301 corresponding to the free end to move along a preset path through the connecting plate 313, and drives the adjacent blocking members 301 to move simultaneously through the elastic member 302 until a number A of blocking members 301 move from the chamber in the box body 201 into the slide groove 304 to enclose the protective frame 200. The locking member 312 keeps the blocking member 301 corresponding to the free end in the second position. Then, the control member 306 is slid into the box body 201 to block the blocking member 301 at the corresponding position.

[0078] The larger the number of A, the smaller the spacing between the blocking elements 301 that create the containment effect, and the greater the degree of containment for the protective frame 200, allowing the degree of containment for the protective frame 200 to be freely adjusted. When A is greater than 0 but less than the total number of blocking elements 301, the protective frame 200 is between a fully open state and a fully contained state. The negative pressure within the cavity of the blocking elements 301 creates suction for rainwater, which is drawn in through the side holes 308, preventing it from entering the protective frame 200 and landing on the generator body 100, reducing short-circuit failures. At the same time, the rainwater drawn into the cavity also improves the heat dissipation of the generator body 100. This is also suitable for use in windy environments, working with the protective frame 200 to prevent objects from impacting the generator body 100. When A is sufficiently large but still less than the total number of blocking elements 301, the protective frame 200 is in a fully contained state, and the gasoline generator is shut down to provide comprehensive protection.

[0079] When used in a dry and windless environment, the two ends of the protective assembly 300 are relatively close to each other, so that the protective assembly 300 is in a retracted state, thereby opening the protective frame 200. Specifically, the control member 306 is first slid out of the box body 201 to cancel the blocking effect on the blocking member 301, and then the locking member 312 is unlocked. The blocking member 301 moves in the opposite direction under the pulling force of the elastic member 302, that is, moves from the slide groove 304 to the cavity in the box body 201. The control member 306 is then slid into the box body 201 to block the blocking member 301 corresponding to the free end. At this time, A is 0, and the protective frame 200 is in a fully open state.

[0080] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A compact gasoline generator set, characterized in that: The invention comprises a generator body and a protective frame arranged outside the generator body, wherein the protective frame is provided with a protective assembly, and one end of the protective assembly is movable relative to the other end thereof between a first position and a second position. When in the first position, the protective assembly is in a retracted state to open the protective frame, and when in the second position, the protective assembly is in a stretched state to enclose the protective frame. Relative to the protection frame, one end of the protection component is a free end, and the other end is a fixed end, and the free end can move between the first position and the second position relative to the fixed end; The protection assembly includes a plurality of blocking members and a plurality of elastic members, wherein adjacent blocking members are connected by the elastic members, and the blocking member corresponding to the free end is capable of moving between the first position and the second position along a preset path, and the adjacent blocking members are driven to move along the preset path by the elastic members; The protective frame is provided with a control member, which is located between the first position and the second position. The control member is used to prevent the blocking member from moving along the preset path. The blocking member located between the control member and the second position has a blocking effect on the protective frame.

2. The compact gasoline generator set according to claim 1, characterized in that: The number of the blocking members between the control member and the second position is A, where A is a positive integer, and the degree of enclosure of the protective frame is positively correlated with the size of A.

3. The compact gasoline generator set according to claim 1, characterized in that: The protection frame is provided with a locking member, and the locking member is used to keep the blocking member corresponding to the free end at the second position.

4. The compact gasoline generator set according to claim 1, characterized in that: The blocking member has a sound-absorbing member on one side close to the generator body.

5. The compact gasoline generator set according to any one of claims 1 to 4, characterized in that: The protective frame includes an inner frame and an outer frame. The generator body is mounted on the inner frame. A plurality of buffer members are provided between the inner frame and the outer frame.

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