阅读说明：本技术 一种无人机的飞行结构 (Unmanned aerial vehicle's flight structure ) 是由 林丽丽 于 2021-08-25 设计创作，主要内容包括：本发明属于无人机技术领域,具体地说是一种无人机的飞行结构,其包括机体和安装在机体顶部的四个飞行杆,四个飞行杆呈周向均布,每个飞行杆一端顶部安装有螺旋桨,机体顶部设置有伞帽,伞帽与机体之间设置有连接装置,伞帽的直径比机体的直径大。本发明通过连接装置在无人机断电时解除锁定状态,伞帽能够起到兜风的作用,从而降低其下降的速度,同时伞帽兜风的过程中,气流通过T型孔移出,由于U型膜的一个端部朝向螺旋桨,U型膜的厚度向螺旋桨的方向由零逐渐变大,因此气流吹向螺旋桨时,使螺旋桨转动的速度更快,螺旋桨转动时的升力能够进一步减缓其下降时的速度,降低无人机的损坏几率。(The invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to a flying structure of an unmanned aerial vehicle, which comprises a machine body and four flying rods arranged at the top of the machine body, wherein the four flying rods are uniformly distributed in the circumferential direction, a propeller is arranged at the top of one end of each flying rod, an umbrella cap is arranged at the top of the machine body, a connecting device is arranged between the umbrella cap and the machine body, and the diameter of the umbrella cap is larger than that of the machine body. According to the invention, the locking state is released through the connecting device when the unmanned aerial vehicle is powered off, the umbrella cap can play a role of air pocket, so that the descending speed of the unmanned aerial vehicle is reduced, meanwhile, in the process of air pocket of the umbrella cap, airflow moves out through the T-shaped hole, and because one end part of the U-shaped film faces the propeller, the thickness of the U-shaped film is gradually increased from zero to the direction of the propeller, when the airflow blows to the propeller, the rotation speed of the propeller is faster, the lifting force of the propeller during rotation can further reduce the descending speed of the propeller, and the damage probability of the unmanned aerial vehicle is reduced.)

1. The utility model provides an unmanned aerial vehicle's flight structure, includes organism (1) and installs four flight bars (2) at organism (1) top, and four flight bars (2) are circumference equipartition, and screw (3), its characterized in that are installed at every flight bar (2) one end top: the top of the machine body (1) is provided with an umbrella cap (4), a connecting device (5) is arranged between the umbrella cap (4) and the machine body (1), the diameter of the umbrella cap (4) is larger than that of the machine body (1), and the edge of the top of the machine body (1) is tightly attached to the bottom surface of the umbrella cap (4); a convex section (6) is arranged at the position, corresponding to the flying rod (2), of the top of the umbrella cap (4), and the convex section (6) covers the outer side of the flying rod (2) and is attached to the flying rod (2); four T type holes have been seted up at parachute cap (4) top, the horizontal segment department in T type hole is provided with guide vane (7), guide vane (7) bottom is passed through U type membrane (8) and is connected with parachute cap (4), and U type membrane (8) level sets up, a tip of U type membrane (8) is towards screw (3), the thickness of U type membrane (8) is by zero grow gradually to the direction of screw (3), the bottom surface of U type membrane (8) is used for guiding the air current acceleration rate under parachute cap (4) to flow in order to blow to screw (3).

2. The flying structure of unmanned aerial vehicle of claim 1, wherein: the connecting device (5) comprises a fixed cylinder (51), the bottom of the fixed cylinder (51) is fixedly connected to the top of the machine body (1), the top of the fixed cylinder (51) is arranged in an open manner, the bottom of the inner side of the fixed cylinder (51) is fixedly connected with a limiting cylinder (52), a T-shaped rod (53) is arranged inside the limiting cylinder (52), the middle of the inner side of the fixed cylinder (51) is fixedly connected with a fixed disk (54), a locking disk (55) is embedded in the center of the top of the fixed disk (54), the bottom of the locking disk (55) is fixedly connected with the top end of the T-shaped rod (53), a moving hole is formed in one side of the locking disk (55), a clamping rod (56) is arranged inside the moving hole, the clamping rod (56) is connected with the end wall of the moving hole through a return spring, a moving hole is formed inside the fixed disk (54) close to the moving hole, the moving hole is correspondingly communicated with the moving hole, and an electromagnet (57) is arranged inside the moving hole; the top of the locking disc (55) is fixedly connected with a connecting spring (58), and the top end of the connecting spring (58) is fixedly connected with the umbrella cap (4).

3. The flying structure of unmanned aerial vehicle of claim 2, wherein: the clamping rod (56) is made of iron, the electromagnet (57) can attract the clamping rod (56) after being electrified, the clamping rod (56) is clamped into the moving hole, and balls are embedded into the upper side and the lower side of the clamping rod (56).

4. The flying structure of unmanned aerial vehicle of claim 1, wherein: the top center of the machine body (1) is provided with auxiliary paddles (9), the end parts of four fan blades of the auxiliary paddles (9) are respectively provided with a main magnetic block (10), the bottom of the air guide sheet (7) is fixedly connected with iron sheets (11), and the iron sheets (11) correspond to the main magnetic blocks (10) one by one.

5. The flying structure of unmanned aerial vehicle of claim 4, wherein: an embedded rod (12) is arranged at the edge of the umbrella cap (4), an auxiliary magnetic block (13) is fixedly connected to one end, close to the main magnetic block (10), of the embedded rod (12), a magnetic blocking block (14) is arranged inside the umbrella cap (4) at the other end of the embedded rod (12), and the polarity of the magnetic blocking block (14) is opposite to that of the auxiliary magnetic block (13).

6. The flying structure of unmanned aerial vehicle of claim 1, wherein: the top of the umbrella cap (4) is convex upwards, and the upper surface of the umbrella cap is streamline.

7. The flying structure of unmanned aerial vehicle of claim 2, wherein: the moving-in hole and the moving-out hole are both horizontally arranged and are positioned at the same horizontal height, and the hole walls of the moving-out hole and the moving-in hole are both polished.

8. The flying structure of unmanned aerial vehicle of claim 1, wherein: organism (1) top edge fixedly connected with silica gel circle (15), silica gel circle (15) and umbrella cap (4) contact, and silica gel circle (15) surface has seted up arc hole (16).

Technical Field

The invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to a flight structure of an unmanned aerial vehicle.

Background

An unmanned aircraft, abbreviated as "drone", and abbreviated in english as "UAV", is an unmanned aircraft that is controlled and operated by radio remote control devices and self-contained programs, or autonomously operated, either completely or intermittently, by an onboard computer. Unmanned aircraft tend to be more suitable for tasks that are too dirty or dangerous than manned aircraft. Unmanned aerial vehicles can be classified into military and civil according to application fields. For military use, unmanned aerial vehicles divide into reconnaissance aircraft and target drone. The civil aspect is really just needed by the unmanned aerial vehicle; at present, the unmanned aerial vehicle is applied to the fields of aerial photography, agriculture, plant protection, miniature self-timer, express transportation, disaster relief, wild animal observation, infectious disease monitoring, surveying and mapping, news reporting, power inspection, disaster relief, film and television shooting, the use of the unmanned aerial vehicle is greatly expanded, and developed countries actively expand industrial application and develop unmanned aerial vehicle technology.

When unmanned aerial vehicle runs into the interference or cuts off the power supply because the electric quantity is not enough, it is not enough steadily to descend subaerial, and its speed that drops from the high altitude is too fast to can cause its damage, can cause the incident when serious.

Therefore, it is necessary to invent a flight structure of an unmanned aerial vehicle to solve the above problems.

Disclosure of Invention

Aiming at the problems, the invention provides a flight structure of an unmanned aerial vehicle, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a flight structure of an unmanned aerial vehicle comprises a machine body and four flight rods arranged at the top of the machine body, wherein the four flight rods are uniformly distributed in the circumferential direction, a propeller is arranged at the top of one end of each flight rod, an umbrella cap is arranged at the top of the machine body, a connecting device is arranged between the umbrella cap and the machine body, the diameter of the umbrella cap is larger than that of the machine body, and the edge of the top of the machine body is tightly attached to the bottom surface of the umbrella cap; the top of the umbrella cap is provided with a convex section corresponding to the position of the flight rod, and the convex section covers the outer side of the flight rod and is attached to the flight rod; four T type holes have been seted up at the umbrella hat top, and the horizontal segment department in T type hole is provided with the guide vane, and the guide vane bottom is connected with the umbrella hat through U type membrane, and U type membrane level sets up, and a tip of U type membrane is towards the screw, and the thickness of U type membrane is by zero grow gradually to the direction of screw, and the bottom surface of U type membrane is used for guiding the airflow acceleration rate under the umbrella hat to flow out in order to blow to the screw.

In one embodiment, the connecting device comprises a fixed cylinder, the bottom of the fixed cylinder is fixedly connected to the top of the machine body, the top of the fixed cylinder is open, the bottom of the inner side of the fixed cylinder is fixedly connected with a limiting cylinder, an inverted T rod is arranged inside the limiting cylinder, the middle of the inner side of the fixed cylinder is fixedly connected with a fixed disk, a locking disk is embedded in the center of the top of the fixed disk, the bottom of the locking disk is fixedly connected with the top of the inverted T rod, one side of the locking disk is provided with a moving hole, the inner part of the moving hole is provided with a clamping rod, the clamping rod is connected with the end wall of the moving hole through a return spring, a moving hole is arranged inside the fixed disk close to the moving hole, the moving hole is correspondingly communicated with the moving hole, and an electromagnet is arranged inside the moving hole; the top of the locking disk is fixedly connected with a connecting spring, and the top end of the connecting spring is fixedly connected with the umbrella cap.

In one embodiment, the clamping rod is made of iron, the electromagnet can attract the clamping rod after being electrified, the clamping rod is clamped into the moving hole, and balls are embedded into the upper side and the lower side of the clamping rod.

In one embodiment, an auxiliary paddle is installed at the center of the top of the machine body, main magnetic blocks are arranged at the end parts of four fan blades of the auxiliary paddle, iron sheets are fixedly connected to the bottom of the air guide sheet, and the iron sheets correspond to the main magnetic blocks one to one.

In one embodiment, an embedded rod is arranged at the edge of the umbrella cap, an auxiliary magnetic block is fixedly connected to one end, close to the main magnetic block, of the embedded rod, a magnetic resistance block is arranged inside the umbrella cap at the other end of the embedded rod, and the magnetic resistance block and the auxiliary magnetic block are opposite in polarity.

In one embodiment, the top of the cap is convex and its upper surface is streamlined.

In one embodiment, the removal hole and the removal hole are both horizontally arranged, both are located at the same horizontal level, and the hole walls of both holes are polished.

In one embodiment, a silica gel ring is fixedly connected to the edge of the top of the machine body, the silica gel ring is in contact with the umbrella cap, and an arc-shaped hole is formed in the surface of the silica gel ring.

The invention has the technical effects and advantages that:

1. according to the unmanned aerial vehicle, the locking state is released through the connecting device when the unmanned aerial vehicle is powered off, the umbrella cap is far away from the machine body due to wind resistance and rises for a certain distance, the umbrella cap can play a role of wind pocket, so that the descending speed of the unmanned aerial vehicle is reduced, meanwhile, in the process of wind pocket of the umbrella cap, airflow is moved out through the T-shaped hole, as one end part of the U-shaped film faces the propeller, the thickness of the U-shaped film is gradually increased from zero to the direction of the propeller, the airflow can be guided to blow to the propeller, the rotating speed of the propeller is higher, the lifting force of the propeller during rotation can further slow down the descending speed of the propeller, and the damage probability of the unmanned aerial vehicle is reduced;

2. according to the invention, through gradual separation of the umbrella cap and the machine body, wind can reach the position right above the machine body, so that the auxiliary paddle is blown to rotate, a certain lift force can be provided in the falling process of the machine body, and the falling speed is further reduced. The main magnetic blocks at the end parts of the auxiliary propellers can adsorb the iron sheet at the bottom of the air guide sheet, so that the umbrella cap can be adsorbed and fixed, the umbrella cap is tightly attached to the top of the machine body before the unmanned aerial vehicle is initially used, and the main magnetic blocks attract the air guide sheet to be tightly attached to the T-shaped hole in the flight process of the unmanned aerial vehicle, so that the air guide sheet is prevented from being opened, wind enters the bottom of the umbrella cap through the T-shaped hole, the umbrella cap is separated from the machine body, and the descending resistance of the unmanned aerial vehicle in the normal flight process is increased;

3. according to the invention, the main magnetic block at the end part of the auxiliary paddle is gradually far away from the auxiliary magnetic block at the end part of the embedded rod through the rotation of the auxiliary paddle, so that the attraction to the auxiliary magnetic block is weakened, one end of the embedded rod can be obliquely moved downwards out of the umbrella cap under the self gravity, when the auxiliary paddle is inclined, the end part of the embedded rod is clung to the ground, the protection effect on the propeller is achieved, and the service life is prolonged;

4. according to the invention, the silica gel ring has a sealing effect on the space between the umbrella cap and the machine body, and the wind entering the center of the bottom of the umbrella cap is reduced, so that the descending probability of the unmanned aerial vehicle in the normal flight process is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall mechanism of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a top view of the present invention with the umbrella cap removed;

FIG. 5 is a schematic view of the construction of the connecting device of the present invention;

FIG. 6 is an enlarged view of portion B of FIG. 5 according to the present invention;

FIG. 7 is a schematic view of the position of the air-guiding plate and the U-shaped membrane of the present invention.

In the figure: the aircraft comprises an aircraft body 1, a flight rod 2, a propeller 3, an umbrella cap 4, a connecting device 5, a fixed cylinder 51, a limiting cylinder 52, an inverted T-shaped rod 53, a fixed disk 54, a locking disk 55, a clamping rod 56, an electromagnet 57, a connecting spring 58, a protruding section 6, an air guide sheet 7, a U-shaped film 8, an auxiliary paddle 9, a main magnetic block 10, an iron sheet 11, an embedded rod 12, an auxiliary magnetic block 13, a magnetic resistance block 14, a silica gel ring 15 and an arc-shaped hole 16.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention;

in the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The invention provides a flight structure of an unmanned aerial vehicle as shown in figures 1-7, which comprises a machine body 1 and four flight rods 2 arranged at the top of the machine body 1, wherein the four flight rods 2 are uniformly distributed in the circumferential direction, the top of one end of each flight rod 2 is provided with a propeller 3, the top of the machine body 1 is provided with an umbrella cap 4, a connecting device 5 is arranged between the umbrella cap 4 and the machine body 1, the diameter of the umbrella cap 4 is larger than that of the machine body 1, and the edge of the top of the machine body 1 is tightly attached to the bottom surface of the umbrella cap 4; a convex section 6 is arranged at the top of the umbrella cap 4 corresponding to the flying rod 2, and the convex section 6 covers the outer side of the flying rod 2 and is attached to the flying rod 2; four T type holes have been seted up at 4 tops of umbrella hat, and the horizontal segment department in T type hole is provided with guide vane 7, and guide vane 7 bottom is connected with umbrella hat 4 through U type membrane 8, and U type membrane 8 level sets up, and a tip of U type membrane 8 is towards screw 3, and the thickness of U type membrane 8 is by zero grow gradually to the direction of screw 3, and the bottom surface of U type membrane 8 is used for guiding the airflow under the umbrella hat 4 to accelerate the outflow in order to blow to screw 3.

When the unmanned aerial vehicle takes off and is powered on, the connecting device 5 is in a state of connecting the machine body 1 and the umbrella cap 4, then the propeller 3 works to drive the unmanned aerial vehicle to take off, when the unmanned aerial vehicle breaks down and is powered off, the connecting device 5 is unlocked and enters a freely-extending state, when the unmanned aerial vehicle falls, the umbrella cap 4 is away from the machine body 1 due to wind resistance, in the descending process, the umbrella cap 4 can play a role of wind wrapping, so that the descending speed of the unmanned aerial vehicle is reduced, meanwhile, in the wind wrapping process of the umbrella cap 4, the wind guide sheet 7 is blown by airflow, the airflow is moved out through the T-shaped hole, as the end part of the U-shaped film 8 faces the propeller 3, the thickness of the U-shaped film 8 is gradually increased towards the direction of the propeller 3 from zero, the airflow is gradually extruded, and then is blown to the propeller 3 at an increased speed, the rotating speed of the propeller 3 is faster, and the lifting force when the propeller 3 rotates can further slow down the unmanned aerial vehicle, reduce unmanned aerial vehicle's damage probability.

Referring to the attached drawings 1, 4, 5 and 6 of the specification, the connecting device 5 comprises a fixed cylinder 51, the bottom of the fixed cylinder 51 is fixedly connected to the top of the machine body 1, the top of the fixed cylinder 51 is open, the bottom of the inner side of the fixed cylinder 51 is fixedly connected with a limiting cylinder 52, a T-shaped rod 53 is arranged inside the limiting cylinder 52, the middle of the inner side of the fixed cylinder 51 is fixedly connected with a fixed disk 54, a locking disk 55 is embedded in the center of the top of the fixed disk 54, the bottom of the locking disk 55 is fixedly connected with the top end of the T-shaped rod 53, a moving hole is formed in one side of the locking disk 55, a clamping rod 56 is arranged inside the moving hole, the clamping rod 56 is connected with the end wall of the moving hole through a return spring, a moving hole is arranged inside the fixed disk 54 close to the moving hole, the moving hole is correspondingly communicated with the moving hole, and an electromagnet 57 is arranged inside the moving hole; the top of the locking disk 55 is fixedly connected with a connecting spring 58, and the top end of the connecting spring 58 is fixedly connected with the umbrella cap 4. The clamping rod 56 is made of iron, the electromagnet 57 can attract the clamping rod 56 after being electrified, so that the clamping rod 56 is clamped in the fixed disc 54, and balls are embedded in the upper side and the lower side of the clamping rod 56. For example, the elastic coefficient of connecting spring 58 sets up as required for when unmanned aerial vehicle normally flies, parachute hat 4 can elasticity and closely laminate on organism 1. After the power is cut off, the connecting spring 58 can also keep the original shape to a large extent, only the inverted T-shaped rod 53 is allowed to rise, and the umbrella cap 4 is unfolded.

When unmanned aerial vehicle circular telegram, electro-magnet 57 circular telegram, thereby inhale the immigration downthehole with chucking pole 56 tip, make locking plate 55 locking on fixed disk 54, break down and the outage back when unmanned aerial vehicle flight in-process breaks down, electro-magnet 57 cuts off the power supply, return spring draws in chucking pole 56 again and shifts out downthehole, parachute head 4 is under the effect of windage this moment, and can stimulate connecting spring 58 and remove, locking plate 55 breaks away from fixed disk 54 top, it removes spacing section of thick bamboo 52 top department until locking plate 55 stimulates T pole 53, the interval between parachute head 4 and organism 1 reaches the maximum condition this moment, the parachute head 4 below that can the at utmost enter into directly over organism 1 to the wind of tenesmus in-process.

Referring to the attached drawings 1, 4 and 7 of the specification, an auxiliary paddle 9 is installed at the center of the top of the machine body 1, main magnetic blocks 10 are arranged at the end portions of four fan blades of the auxiliary paddle 9, iron sheets 11 are fixedly connected to the bottom of the air guide sheet 7, and the iron sheets 11 correspond to the main magnetic blocks 10 one by one.

After the umbrella hat 4 and the organism 1 separate gradually, the umbrella hat 4 no longer seals 1 top edge of organism, and the air current in the umbrella hat 4 can reach directly over the organism 1 this moment to blow vice oar 9 and rotate, can provide certain lift at the organism 1 tenesmus in-process, thereby further reduced its speed of tenesmus. Because main magnetic path 10 can adsorb iron sheet 11 of guide vane 7 bottom, thereby have the fixed effect of absorption to parachute hat 4, consequently before unmanned aerial vehicle initial use, make parachute hat 4 paste tight organism 1 top, and at unmanned aerial vehicle flight in-process, attract guide vane 7 to tightly laminate in T type hole department, prevent that guide vane 7 from opening, prevent that the distinguished and admirable 4 bottoms that enter into parachute hat through T type hole, arouse parachute hat 4 and organism 1 separation, increase its decline resistance of normal flight in-process.

Referring to the attached drawings 1 and 2 of the specification, an embedded rod 12 is arranged at the edge of the umbrella cap 4, an auxiliary magnetic block 13 is fixedly connected to one end, close to the main magnetic block 10, of the embedded rod 12, a magnetic blocking block 14 is arranged inside the umbrella cap 4 at the other end of the embedded rod 12, and the magnetic blocking block 14 and the auxiliary magnetic block 13 are opposite in polarity.

After unmanned aerial vehicle breaks down, at the in-process that weighs down, parachute hat 4 can only weaken its speed of decline, consequently, after it falls ground, 1 bottom of organism strikes ground after, can take place the bounce-back, thereby cause it to empty easily, consequently after breaking down, parachute hat 4 breaks away from one section distance with organism 1, when vice oar 9 rotates, the supplementary magnetic path 13 of embedding pole 12 tip can be kept away from gradually to main magnetic path 10 of vice oar 9 tip, consequently, weak to the magnetic attraction of supplementary magnetic path 13, release embedding pole 12, embedding pole 12 one end can receive self gravity to shift out parachute hat 4 downwards to one side this moment, when vice oar 9 emptys, embedding pole 12 tip pestle is subaerial, play the guard action to propeller 3, and the service life is prolonged. For example, recessed pole 12 is attached within umbrella cap 4 by an elastic cord that can pull on the recessed pole to prevent recessed pole 12 from completely disengaging from the umbrella cap, and that can allow recessed pole 12 to partially slide out of umbrella cap 4.

Referring to the attached figure 1 of the specification, the top of the umbrella cap 4 is convex upwards, and the upper surface of the umbrella cap is streamline. Reducing its drag in upward or horizontal flight.

Referring to fig. 6 of the specification, the moving-out hole and the moving-in hole are both horizontally arranged and are located at the same horizontal height, and the hole walls of the moving-out hole and the moving-in hole are both polished, so that the resistance of the clamping rod 56 in the moving process can be reduced.

Referring to the attached drawings 1 and 2 of the specification, a silica gel ring 15 is fixedly connected to the edge of the top of the machine body 1, the silica gel ring 15 is in contact with the umbrella cap 4, and an arc-shaped hole 16, such as an inverted V-shaped hole, is formed in the surface of the silica gel ring 15.

Silica gel circle 15 plays sealed effect between to parachute hat 4 and the organism 1, reduce wind and enter into parachute hat 4 bottom center department, thereby reduce the probability that its normal flight in-process descends, simultaneously because the setting of arc hole 16, conveniently with 15 extrusion deformation of silica gel circle, improve its life, and when unmanned aerial vehicle breaks down and the tenesmus, the slope of 16 both ends in arc hole is down, and arc hole 16 middle part is higher than both ends, this kind of setting, when wind enters into in the arc hole 16, there is comparatively obvious slow-down effect, the speed when further having reduced unmanned aerial vehicle and descending.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.