阅读说明：本技术 一种用于建筑工程的便携式脚手架 (A portable scaffold frame for building engineering ) 是由 王磊 于 2021-09-15 设计创作，主要内容包括：本发明涉及脚手架技术领域,尤其涉及一种用于建筑工程的便携式脚手架。本发明要解决的是工作人员是处于高处工作,容易造成意外,该装置要保证安装的稳定性,否则容易造成摇晃,增加危险性,装置的工作高度不能被限制住,同时拆卸时以防丢失零件的技术问题。为了解决上述技术问题,本发明提供了一种用于建筑工程的便携式脚手架及调节方法,本发明由底座、壳体、连接架、保护机构和固定机构组成,通过壳体内部的电动推杆,可以对脚手架进行上升下降,使装置可以在不同高度环境使用,当零件拆卸下来时,放置在底座上,给可选电磁铁模块进行通电,产生磁性,可以将拆卸的零件吸附在底座上,减少小零件的丢失,防止对以后的工作造成困难。(The invention relates to the technical field of scaffolds, in particular to a portable scaffold for constructional engineering. The invention aims to solve the technical problems that when a worker works at a high position, accidents are easily caused, the device needs to ensure the stability of installation, otherwise shaking is easily caused, the danger is increased, the working height of the device cannot be limited, and parts are prevented from being lost during disassembly. In order to solve the technical problems, the invention provides a portable scaffold for constructional engineering and an adjusting method, the portable scaffold comprises a base, a shell, a connecting frame, a protection mechanism and a fixing mechanism, the scaffold can be lifted and lowered through an electric push rod in the shell, so that the device can be used in environments with different heights, when parts are disassembled, the parts are placed on the base, an optional electromagnet module is electrified to generate magnetism, the disassembled parts can be adsorbed on the base, the loss of small parts is reduced, and the difficulty in later work is prevented.)

1. A portable scaffold for building engineering which characterized in that: comprises a base (1), shells (2), (29), a protection mechanism and a fixing mechanism;

an optional electromagnet module (24) is fixedly mounted on the inner wall of a top plate of the base (1), the optional electromagnet module (24) comprises an outer ring covering layer and an inner ring body, a cable is wound on the left half side of the outer ring covering layer, a rope is wound on the half side of the outer ring covering layer, the inner ring body is an electromagnet module, a spring coiling mechanism is arranged in the base (1) of the optional electromagnet module (24), a storage battery (25) is fixedly mounted on the inner wall of the bottom of the base (1), a support (23) and four shells (2) are fixedly mounted on the top end face of the base (1), electric push rods (3) are sleeved in the four shells (2), openings (4) are formed in one sides of the four shells (2), connecting blocks (5) are fixedly mounted at the output ends of the four electric push rods (3), and fasteners (6) are welded at one ends of the four connecting blocks (5), the four fasteners (6) are respectively sleeved with a hollow upright rod (7), notches (701) are formed in the four upright rods (7), a clamping block (702) is fixedly installed inside each fastener (6), and the notches (701) are clamped with the clamping block (702);

the fixing mechanism comprises a chrysanthemum plate (8), a cross bar (9), a first iron frame (12), a supporting bar (13) and a second iron frame (1201), wherein one side of the first iron frame (12) is hinged with the second iron frame (1201) through a hinge, four chrysanthemum plates (8) are fixedly sleeved on the outer surface of the vertical bar (7), joints (10) are fixedly mounted at the two ends of the cross bar (9), the two ends of the cross bar (9) are clamped between the two chrysanthemum plates (8), a bolt (11) is vertically clamped in the chrysanthemum plates (8) and the joints (10), the first iron frame (12) and the second iron frame (1201) are lapped on the top ends of the four vertical bars (7), the supporting bar (13) is sleeved inside one side frame on the first iron frame (12), and a fixing plate (14) is vertically and fixedly mounted on the supporting bar (13) and the vertical bars (7) through two first bolts (15), one first bolt (15) penetrates through the fixing plate (14) and is installed at one end of the supporting bar (13), the other first bolt (15) penetrates through the fixing plate (14) and is installed on the vertical rod (7), the number of the fixing plates (14) is four, a reticular plate (18) is fixedly installed between the first iron frames (12), first connecting rods (16) are fixedly installed between the frames of the first iron frames (12), and a second connecting rod (17) is fixedly installed between the first connecting rods (16);

the protection mechanism comprises hollow supporting tubes (19), hollow inserting tubes (20), second bolts (21), a meshed plate (18) and stop blocks (28), the supporting tubes (19) are vertically and fixedly installed on the top end faces of the four corners of the first iron frame (12), the inserting tubes (20) are sleeved on the four supporting tubes (19), the second bolts (21) penetrate through the supporting tubes (19) and the inserting tubes (20) in a threaded mode, the meshed plate (18) is fixedly installed between every two inserting tubes (20), a first stop block (28) is fixedly installed inside one inserting tube (20) on the left side, a fixed inserting row is arranged on the first stop block (28), a second stop block is fixedly installed inside one inserting tube (20) on the right side, a sliding ring is arranged in the second stop block, and a locking device is arranged in the sliding ring;

wherein the cable is connected to behind casing (2), electric putter (3), pole setting (7), the hollow intubate (20) that run through nearby respectively in proper order after wearing out from the left side of base (1) fixed row of inserting, and the cable is connected to behind casing (2), electric putter (3), pole setting (7), hollow intubate (20), the sliding ring that run through nearby respectively in proper order after wearing out from the right side of base (1) locking means, wherein this internal strengthening rib rope that is provided with of cable.

2. A portable scaffold for construction engineering according to claim 1, characterized in that: four equal fixed mounting in bottom of base (1) have universal wheel (26), one side fixed mounting of base (1) has push rod (27).

3. A portable scaffold for construction engineering according to claim 1, characterized in that: the number of the connecting frames (22) is four, and two ends of each connecting frame (22) are fixedly installed on the top end face of the base (1) and the side face of the shell (2) respectively.

4. A portable scaffold for construction engineering according to claim 1, characterized in that: the length of first chase (12) and support bar (13) equals, the frame of first chase (12) is hollow iron pipe, the diameter of support bar (13) is equal with the inner circle of first chase (12) through directly.

5. A portable scaffold for construction engineering according to claim 1, characterized in that: the net plate (18) is installed above the first connecting rod (16) and the second connecting rod (17).

6. A portable scaffold for construction engineering according to claim 1, characterized in that: the selectable electromagnet modules (24) are electrically connected with the electric push rod (3) and the storage battery (25), and the number of the reticular plates (18) is five.

7. A portable scaffold for construction engineering according to claim 1, characterized in that: the support (23) is provided with a through hole, and the length of the support (23) is equal to the width between the two shells (2).

8. A portable scaffold for construction engineering according to claim 1, characterized in that: the length and the width of the first iron frame (12) are equal to those of the four vertical rods (7).

9. A portable scaffold for construction engineering according to claim 1, characterized in that: four all weld between casing (2) and base (1), the outer wall of stay tube (19) and the inner wall laminating of intubate (20).

Technical Field

The invention relates to a portable scaffold for constructional engineering, in particular to a portable scaffold for constructional engineering, and belongs to the technical field of scaffolds.

Background

The scaffold is a working platform which is erected for ensuring that each construction process is smoothly carried out, and is divided into an outer scaffold and an inner scaffold according to the erected position; the scaffold can be divided into a wood scaffold, a bamboo scaffold and a steel pipe scaffold according to different materials; the scaffold is divided into a vertical rod type scaffold, a bridge type scaffold, a door type scaffold, a suspension type scaffold, a hanging type scaffold, a lifting type scaffold and a climbing type scaffold according to the structural form.

The prior patent (publication number: CN209228013U) discloses a portable scaffold for constructional engineering, and relates to the technical field of scaffolds for buildings. The auxiliary climbing frame is arranged on the side surface of the supporting platform, so that a constructor can conveniently and safely climb on the supporting platform; simple structure, convenient use and carrying. Other prior art patents, for example, CN206299109U, relate to a disk scaffold protective net, which uses a daisy disk to overlap scaffolds, and uses the protective net to close the circumferential space, so as to form a protective structure in construction work. However, the protective net of the closed enclosure structure is inconvenient to store, and the scaffold needs to pull cables during construction operation and overlap the cables outside the scaffold, so that interference to operators in the climbing process is easily caused, and personal safety is seriously threatened.

The inventor finds that the following problems in the prior art are not solved well in the process of realizing the scheme: 1. when the device is used, workers work at a high place, but no protective measures are provided around the workers, so that accidents are easily caused; 2. the device is too large, needs to be disassembled and then installed for use, needs to ensure the stability of installation, otherwise is easy to shake, and increases the danger to workers during working; 3. the working height of the device can not be limited, and the device can be lifted and lowered, so that various scenes can be used, and meanwhile, when the device is disassembled, the disassembled object needs to be fixed, so that parts are prevented from being lost, and the next work is prevented from being blocked.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a portable scaffold for construction work.

The invention achieves the aim through the following technical scheme, and the portable scaffold for the building engineering comprises a base, a shell, a protection mechanism and a fixing mechanism;

an optional electromagnet module is fixedly installed on the inner wall of a top plate of the base and comprises an outer ring covering layer and an inner ring body, a cable is wound on the left half side of the outer ring covering layer, a rope is wound on the half side of the outer ring covering layer, the inner ring body is an electromagnet module, a spring coiling mechanism is arranged in the base, a storage battery is fixedly installed on the inner wall of the bottom of the base, a support and four shells are fixedly installed on the top end face of the base, electric push rods are sleeved inside the four shells, openings are formed in one sides of the four shells, connecting blocks are fixedly installed at the output ends of the four electric push rods, fasteners are welded at one ends of the four connecting blocks, hollow upright rods are sleeved on the four fasteners, notches are formed in the four upright rods, and clamping blocks are fixedly installed inside the fasteners, the notch is clamped with the clamping block;

the fixing mechanism comprises chrysanthemum disks, a cross rod, a first iron frame, a support bar and a second iron frame, wherein the second iron frame is hinged to one side of the first iron frame through a hinge, the number of the second iron frame is four, the chrysanthemum disks are fixedly sleeved on the outer surfaces of the vertical rods, joints are fixedly installed at the two ends of the cross rod, the two ends of the cross rod are clamped between the two chrysanthemum disks, a bolt is vertically clamped in the chrysanthemum disks and the joints, the first iron frame and the second iron frame are overlapped on the top ends of the four vertical rods, the support bar is sleeved inside a side frame on the first iron frame, a fixed plate is vertically and fixedly installed on the support bar and the vertical rods through two first bolts, one first bolt penetrates through the fixed plate and is installed at one end of the support bar, the other first bolt penetrates through the fixed plate and is installed on the vertical rods, the number of the fixed plate is four, and a reticular plate is fixedly installed between the first iron frames, first connecting rods are fixedly arranged between the frames of the first iron frame, and second connecting rods are fixedly arranged between the first connecting rods;

the protection mechanism comprises hollow supporting tubes, hollow insertion tubes, second bolts, a net-shaped plate and stop blocks, wherein the supporting tubes are vertically and fixedly installed on the top end surfaces of four corners of the first iron frame, the four supporting tubes are sleeved with the insertion tubes, the second bolts penetrate through the supporting tubes and the insertion tubes in a threaded manner, the net-shaped plate is fixedly installed between every two insertion tubes, a first stop block is fixedly installed inside one insertion tube on the left side, a fixed insertion row is arranged on the first stop block, a second stop block is fixedly installed inside one insertion tube on the right side, a sliding ring is arranged in the second stop block, and a locking device is arranged in the sliding ring;

wherein the cable is connected to behind the casing, electric putter, pole setting, the hollow intubate that run through in proper order nearby respectively after wearing out from the left side of base fixed row of inserting, the cable is connected to behind casing, electric putter, pole setting, hollow intubate, the sliding ring that run through in proper order nearby respectively after wearing out from the right side of base locking means, wherein be provided with the strengthening rib rope in the cable body.

Preferably, four equal fixed mounting in bottom of base have the universal wheel, one side fixed mounting of base has the push rod.

Preferably, one of the first bolts penetrates through the fixing plate and is installed at one end of the supporting bar, the other first bolt penetrates through the fixing plate and is installed on the vertical rod, and the number of the fixing plates is four.

Preferably, the number of the connecting frames is four, and two ends of the connecting frames are fixedly installed on the top end face of the base and the side face of the shell respectively.

Preferably, the length of first chase length and support bar equals, the frame of first chase is hollow iron pipe, the diameter of support bar equals with the inner circle straight warp of first chase.

Preferably, the mesh plate is installed above the first and second connection bars.

Preferably, the selectable electromagnet modules and the electric push rod are electrically connected with the storage battery, and the number of the meshed plates is five.

Preferably, the bracket is provided with a through hole, and the length of the bracket is equal to the width between the two shells.

Preferably, the length and the width of first chase are equal with the length and the width that four poles formed, first chase one side is articulated through the hinge to have the second chase.

Preferably, four all welds between casing and the base, the outer wall of stay tube and the inner wall laminating of intubate.

The invention has the beneficial effects that:

1. according to the invention, the rotatable electromagnet module, the cable and the cable which are respectively configured on two sides, the configuration of the reinforcing ribs in the cable and the arrangement of the top stop block enable the cable and the cable to be dragged when accidentally falling on the basis of placing and corroding the cable and the cable in a sealed wiring manner, and in addition, the cable and the cable are sealed and wired to enable operators not to be accidentally wound to cause accidents;

2. the protection mechanism is arranged and fixed on the first iron frame through the supporting tube, so that workers are protected, accidents of the workers can be prevented by the mesh plate, articles can be temporarily hung on the mesh plate, one of the insertion tubes is designed to be capable of storing a cabinet cup, convenience is brought to the workers, the safety of a working environment is guaranteed, and the practicability is improved;

3. the fixing mechanism is arranged, the four upright posts are fixed through the chrysanthemum disc and the joints, meanwhile, the chrysanthemum disc can be disassembled, the chrysanthemum disc is high in stability and easy to disassemble after being matched and fixed with the chrysanthemum disc, the first iron frame and the upright posts are fixed through the fixing plate and the first bolts, a scaffold is formed, and the fixing can be maximized while the rapid disassembly is guaranteed;

4. the invention is provided with the base, when the part is detached, the part is placed on the base, the selectable electromagnet module is electrified to generate magnetism, the detached part can be adsorbed on the base, and the condition that the small part is lost 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 only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

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

FIG. 2 is a schematic sectional view of the housing of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic bottom view of the first iron frame and the support bar of the present invention;

FIG. 5 is a schematic left side view of the cannula in connection with the mesh plate in accordance with the present invention;

fig. 6 is a schematic view of the connection relationship between the supporting bars and the fixing plates according to the present invention.

In the figure: 1. a base; 2. a housing; 3. an electric push rod; 4. an opening; 5. connecting blocks; 6. a fastener; 7. erecting a rod; 701. a notch; 702. a clamping block; 8. a chrysanthemum dish; 9. a cross bar; 10. a joint; 11. a bolt; 12. a first iron frame; 1201. a second iron frame; 13. a supporting strip; 14. a fixing plate; 15. a first bolt; 16. a first connecting rod; 17. a second connecting rod; 18. a mesh plate; 19. supporting a tube; 20. inserting a tube; 21. a second bolt; 22. a connecting frame; 23. a support; 24. an optional electromagnet module; 25. a storage battery; 26. a universal wheel; 27. a push rod; 28. and a stop block.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Referring to fig. 1 to 6, a portable scaffold for construction engineering includes a base 1, a housing 2, 29, a protection mechanism and a fixing mechanism;

an optional electromagnet module 24 is fixedly installed on the inner wall of a top plate of the base 1, the optional electromagnet module 24 comprises an outer ring covering layer and an inner ring body, a cable is wound on the left half side of the outer ring covering layer, a cable is wound on the half side of the outer ring covering layer, the inner ring body is an electromagnet module, a coil spring mechanism is arranged in the base 1 of the optional electromagnet module 24, a storage battery 25 is fixedly installed on the inner wall of the bottom of the base 1, a support 23 and four shells 2 are fixedly installed on the top end face of the base 1, electric push rods 3 are all sleeved inside the four shells 2, openings 4 are all formed in one sides of the four shells 2, connecting blocks 5 are all fixedly installed at the output ends of the four electric push rods 3, fasteners 6 are all welded at one ends of the four connecting blocks 5, hollow upright rods 7 are all sleeved on the four fasteners 6, and notches 701 are all formed in the four upright rods 7, a clamping block 702 is fixedly installed inside the fastener 6, and the notch 701 is clamped with the clamping block 702;

the fixing mechanism comprises a chrysanthemum plate 8, a cross rod 9, a first iron frame 12, a supporting bar 13 and a second iron frame 1201, wherein one side of the first iron frame 12 is hinged with the second iron frame 1201 through a hinge, the outer surface of the vertical rod 7 is fixedly sleeved with the chrysanthemum plate 8, the two ends of the cross rod 9 are fixedly provided with a joint 10, the two ends of the cross rod 9 are clamped between the two chrysanthemum plates 8, a bolt 11 is vertically clamped in the chrysanthemum plates 8 and the joint 10, the first iron frame 12 and the second iron frame 1201 are lapped at the top ends of the four vertical rods 7, the supporting bar 13 is sheathed inside a side frame on the first iron frame 12, the fixing plate 14 is vertically and fixedly arranged on the supporting bar 13 and the vertical rod 7 through two first bolts 15, one of the first bolts 15 penetrates through the fixing plate 14 and is arranged at one end of the supporting bar 13, the other first bolt 15 penetrates through the fixing plate 14 and is arranged on the vertical rod 7, the number of the fixing plates 14 is four, the mesh plates 18 are fixedly installed between the first iron frames 12, the first connecting rods 16 are fixedly installed between the frames of the first iron frames 12, and the second connecting rods 17 are fixedly installed between the first connecting rods 16;

the protection mechanism comprises a hollow supporting tube 19, hollow insertion tubes 20, second bolts 21, a meshed plate 18 and stop blocks 28, wherein the supporting tubes 19 are vertically and fixedly installed on the top end faces of four corners of the first iron frame 12, the insertion tubes 20 are sleeved on the four supporting tubes 19, the second bolts 21 penetrate through the supporting tubes 19 and the insertion tubes 20 in a threaded manner, the meshed plate 18 is fixedly installed between every two insertion tubes 20, the first stop block 28 is fixedly installed inside one insertion tube 20 on the left side, a fixed inserting row is arranged on the first stop block 28, the second stop block is fixedly installed inside one insertion tube 20 on the right side, a sliding ring is arranged inside the second stop block, and a locking device is arranged in the sliding ring;

wherein the cable is connected to behind casing 2, electric putter 3, pole setting 7, the hollow intubate 20 that run through in proper order after wearing out from the left side of base 1 respectively fixed row of inserting, and the cable is connected to behind casing 2, electric putter 3, pole setting 7, the hollow intubate 20, the sliding ring that run through in proper order after wearing out from the right side of base 1 locking means, wherein this internal strengthening rib rope that is provided with of cable.

Specifically, first chase 12 length equals with the length of support bar 13, the frame of first chase 12 is hollow iron pipe, support bar 13's diameter is equal with the inner circle of first chase 12 straight warp, guarantees that support bar 13 supports first chase 12 and second chase 1201 and makes first chase 12 and second chase 1201 simultaneously at same height.

In particular, the mesh plate 18 is mounted above the first connecting rod 16 and the second connecting rod 17, which cooperate with the second iron frame 1201 and the first iron frame 12 to form a standing table.

Specifically, the selectable electromagnet modules 24 are electrically connected with the electric push rod 3 and the storage battery 25, and the number of the mesh plates 18 is five, so that the normal operation of the electric appliance is ensured.

Specifically, a through hole is formed in the support 23, the length of the support 23 is equal to the width between the two shells 2, and it is guaranteed that the support 23 blocks the detached parts during transportation.

Specifically, the length and the width of first chase 12 are equal with the length and the width that four pole settings 7 formed, first chase 12 one side is articulated through the hinge to have second chase 1201, and second chase 1201 and first chase 12 form the workstation.

Specifically, four all weld between casing 2 and the base 1, the outer wall of stay tube 19 and the inner wall laminating of intubate 20, the stability between casing 2 and the base 1 is guaranteed in the welding.

Electrical components that appear in this application all external intercommunication power and control switch when using, the staff passes through chrysanthemum dish 8, the joint is fixed four pole settings 7 between horizontal pole 9 and the joint 10, knock off chrysanthemum dish 8, the maximize will connect between 10 and the pole setting 7 fixed, simultaneously can also dismantle fast, because of chrysanthemum dish 8 is than higher at the steadiness, and also dismantle easily after fixed with chrysanthemum dish 8 collocation, so regardless of dismantlement or installation all comparatively convenient, rethread fixed plate 14 and first bolt 15 fix first chase 12 and pole setting 7, form the scaffold, guarantee to fix simultaneously swiftly dismantlement by the maximize, pass through fastener 6 fixed mounting on electric putter 3 with pole setting 7, stability when notch 701 and fixture block 702 guarantee to go up and down. Because the fixed power strip is fixed on the first stop block, the working electric appliance can be always plugged on the fixed power strip without pulling down, because the vertical rod 7 drives the first insertion tube 20 to ascend at the same part and the rotatable electromagnet module passively rotates to release the cable in the process, and similarly, the cable is released at the same part and can be wound on the body of an operator to prevent the operator from continuing to descend when the operator accidentally drops, because the cable side is fixed and provided with a reinforcing rib rope and fixed on the first stop block 28 even if the operator drops accidentally, the rotatable electromagnet module is kept fixed, and the cable can not continue to extend even if the operator drops; when the scaffold is required to descend, the electric push rod 3 is only required to be started to drive the vertical rod 7 to descend, the coil spring connected with the rotatable magnet module is matched with active winding in the process, so that the cable and the rope are synchronously wound, and the rope and the cable which are positioned outside the first inserting pipe 20 are always kept inconvenient in length.

In addition, if rainwater in the construction operation can directly drop through the net plates at the side part and the bottom part in the process, the cable cannot be exposed outside due to the fact that the cable runs through the sealed channel, and therefore corrosion cannot occur.

The supporting tube 19 and the first insertion tube 20 are fixed through the second bolt 21, so that the range protection is performed when a worker works on the first iron frame 12, the mesh plate 18 can prevent accidents of the worker, meanwhile, objects can be hung on the mesh plate 18 temporarily, a stop block 28 is arranged inside one insertion tube 20, a water cup of the cabinet can be stored, convenience is brought to the worker, and the safety of the working environment is guaranteed.

When the height needs to be adjusted, the electric push rod 3 in the shell 2 can lift and descend the scaffold, so that the device can be used in environments with different heights, when the work is finished, the detachable parts are placed on the base 1, the optional electromagnet module 24 is powered on to generate magnetism, the detachable parts can be adsorbed on the base 1, the loss of small parts is reduced, and the difficulty in later work is prevented. While the sliding of the parts can be blocked by the bracket 23 on the base 1.

It is well within the skill of those in the art to implement, and not to be bound by any theory, the present invention is not limited to the specific details set forth in the specification.

In the description of the invention, it is to be understood that the terms "center", "middle", "eccentric", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of describing the invention and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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.