CN115565800B

CN115565800B - Power switch with alarm function

Info

Publication number: CN115565800B
Application number: CN202211548702.4A
Authority: CN
Inventors: 林佩珊
Original assignee: Suyuan Electric Quanzhou Co ltd
Current assignee: Suyuan Electric Quanzhou Co ltd; Xiamen Likong Electric Co ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-03-24
Anticipated expiration: 2042-12-05
Also published as: CN115565800A

Abstract

The invention relates to the technical field of electric appliances, in particular to a power switch with an alarm function. The invention aims to provide a power switch with an alarm function, which can not bring invalid alarm prompt when the switch is closed. The utility model provides a switch with alarming function, is equipped with the mounting bracket including support frame, mounting bracket, starting switch and press alarm mechanism etc. on the support frame, is connected with starting switch on the mounting bracket, still is equipped with the alarm mechanism that presses through pressing down the trigger alarm including mounting bracket upper portion, presses alarm mechanism including hiding presser, alarm, rotating assembly and speed reduction subassembly. When the starting switch is turned off, the pushing plate is loosened, so that the rotating plate rotates to reset, and the rotating plate is decelerated due to the action of the decelerating spring and the decelerating block, so that the alarm is prevented from being touched by mistake, and invalid alarm prompt is avoided.

Description

Power switch with alarm function

Technical Field

The invention relates to the technical field of electric appliances, in particular to a power switch with an alarm function.

Background

Switch mainly is that control electrical apparatus closes or operates, and place electrical equipment has very big potential safety hazard a bit, and non-staff can not touch switch at will, otherwise can appear danger or bring very big trouble for the staff, for example: electrical equipment in building construction, large-scale electrical equipment in the mill etc. if non-staff member mistake when touching switch, very easily make electrical apparatus abnormal operation to let non-staff member receive the injury.

The patent with patent publication number CN113643920B discloses a power switch with an alarm prompting structure, which comprises a switch seat; the switch seat is provided with a cover plate, and the cover plate is provided with an alarm part; the cover plate includes: the two elastic blocks are arranged in the two sliding grooves respectively and are in contact with the sliding bulges; the stop block is welded on the top end face of the switch base, aligned with the extrusion switch and in elastic contact with the extrusion switch when the cover plate moves downwards by 0.3 cm; the cover plate is provided with a locking part and a driving part.

When using this switch with warning suggestion structure, earlier through pressing down the identification block, and then the apron unblock, then through with apron rebound and then trigger control switch, when closing control switch, with the apron hard after pushing down, under the effect of the elasticity of elasticity piece, make the apron rapidly move down, because elasticity inertia, can make the apron drive dog extrusion switch, the mistake is touched the warning again like this, this not only can bring invalid warning suggestion for the staff, and damage the apron easily, now develop a switch with alarming function, can be when closing switch, can not bring invalid warning suggestion.

Disclosure of Invention

In order to overcome the defects that false touch alarm is easy to occur and invalid alarm prompt is brought when the existing power switch with an alarm prompt structure is used, the invention aims to provide the power switch with the alarm function, which can realize that the invalid alarm prompt is not brought when the switch is closed.

The utility model provides a switch with alarming function, which comprises a supporting rack, a mounting bracket, starting switch, press alarm mechanism and control mechanism, be equipped with the mounting bracket on the support bracket, be connected with starting switch on the mounting bracket, mounting bracket upper portion is equipped with the press alarm mechanism who reports to the police when the abnormal use switch, press alarm mechanism including hiding the presser, the alarm, rotating assembly and speed reduction subassembly, the mounting bracket is connected with along peripheral slidingtype and hides the presser, it is used for hiding starting switch to hide the presser, protect starting switch, the mounting bracket upper portion left and right sides all is connected with the alarm, the mounting bracket top left and right sides all is equipped with rotating assembly, be equipped with speed reduction subassembly on the mounting bracket, when simply pressing the presser, rotating assembly takes place to rotate extrusion alarm and sends the police dispatch newspaper and reminds, be equipped with control mechanism on the mounting bracket, when normally starting switch, with control mechanism to inboard motion extrusion rotating assembly antiport and far away from the alarm, press the presser so that starting switch normally opens again, speed reduction subassembly to the speed that the rotating assembly resets after loosening control mechanism reduces the speed of resetting process, rotating assembly does not contact with the alarm.

Further, the rotating assembly is including n shape connecting rod, rotor plate and torque spring, the mounting bracket top left and right sides all has n shape connecting rod through bolted connection, n shape connecting rod is located between two alarms, the equal rotary type in n shape connecting rod middle part is connected with the rotor plate, cover presser and rotor plate extrusion fit, all be connected with torque spring between both sides and the n shape connecting rod around the rotor plate, torque spring is respectively around rolling up on n shape connecting rod, when covering the presser downward movement contact rotor plate, the rotor plate outside is then upwards swing triggers the alarm and sends out the police dispatch newspaper.

Further, the speed reduction assembly comprises a speed reduction block and a speed reduction spring, a set of speed reduction block used for reducing the speed of the rotating plate is connected to the left side and the right side of the upper portion of the mounting frame in a sliding mode, the speed reduction block is in contact fit with the rotating plate, and the speed reduction spring is connected between the upper side and the lower side of the speed reduction block and the mounting frame respectively.

Further, control mechanism is including the kickboard, wedge push rod and promotion spring, the equal slidingtype of mounting bracket upper portion left and right sides is connected with the wedge push rod of at least one wedge face towards close rotor plate one side, wedge push rod and rotor plate press fit, all weld the kickboard of rectangle between the close wedge push rod outside so that press, press the kickboard to the inboard and drive the wedge push rod and move the extrusion rotor plate outside and rotate downwards and keep away from the alarm to the inboard, all around having the promotion spring on the wedge push rod, the promotion spring outer end is connected with close kickboard, the promotion spring inner is connected with the mounting bracket respectively.

Furthermore, still cover pressing device automatic re-setting's canceling release mechanical system including the drive, canceling release mechanical system is including sliding block, sliding connection pole and pressure spring, and the equal bilateral symmetry slidingtype in both sides is connected with the sliding block around the mounting bracket, and equal rotary type is connected with sliding connection pole on the sliding block, sliding connection pole upper portion with cover the pressing device rotary type and connect, the sliding block inboard respectively and all be connected with pressure spring between the mounting bracket.

Further, still including the wrong guide mechanism that the wrong guide is not invalid to be triggered of staff, wrong guide mechanism is including pressing the movable rack, limiting block and restriction subassembly, and both sides all are connected with limiting block around covering the presser lower part, cover presser upper portion sliding connection and press the movable rack, and it is provided with the icon of pressing to press movable rack top, presses the icon to be used for wrong guide non-staff to press the movable rack, is equipped with on the mounting bracket to be used for the restriction to cover the restriction subassembly that the presser moved down.

Further, the limiting assembly comprises an n-shaped limiting rod and a limiting spring, the n-shaped limiting rod is connected to the front side and the rear side of the upper portion of the mounting frame in a sliding mode, the top of the n-shaped limiting rod is in contact fit with the bottom of the limiting block, four corners of the lower portion of the n-shaped limiting rod are arranged on inclined planes, the limiting spring is connected between the left side and the right side of the n-shaped limiting rod and the mounting frame, and the pressing frame moves downwards to move the n-shaped limiting rod outwards and is not limited to the limiting block.

Further, still including being used for supplementary n shape restriction lever to outside supplementary pushing mechanism who promotes, supplementary pushing mechanism is including guide pin bushing and supplementary push rod, and the symmetrical welding has the guide pin bushing around the mounting bracket upper portion left and right sides is equal, and equal sliding connection has supplementary push rod on the guide pin bushing, and the supplementary push rod outside is connected with close slurcam respectively, and the slurcam moves to the inboard and can drive supplementary push rod and promote to the inboard, and supplementary push rod promotes n shape restriction lever to the outside.

The invention has the beneficial effects that: 1. according to the invention, the covering and pressing device is pressed downwards in a conventional mode, the alarm can be triggered by extruding the rotating plate, a worker can be reminded through the alarm, and the rotating plate can block the covering and pressing device from continuously moving downwards, so that the safety of the power switch can be improved.

2. When the starting switch is turned off, the pushing plate is loosened, so that the rotating plate rotates and resets, and the rotating plate is decelerated due to the action of the decelerating spring and the decelerating block, so that the alarm is prevented from being touched by mistake, and invalid alarm prompt is avoided.

3. When the covering and pressing device is released, the covering and pressing device is driven to automatically move upwards to reset under the action of the pressure spring, so that the covering and pressing device can be manually reset without manual operation.

4. When a person mistakenly touches the covering pressing device, the n-shaped limiting rod and the limiting block are arranged, the phenomenon that the covering pressing device moves downwards to trigger an alarm can be avoided, the trouble of the worker can be reduced, in addition, the pressing icon is arranged on the pressing frame, the misleading purpose can be achieved for non-workers, and the safety of the power switch can be improved.

5. According to the invention, when the push plate is pressed during working, the effect of automatically releasing and covering the pressing device is realized through the extrusion fit between the auxiliary push rod and the n-shaped limiting rod, so that the efficiency of triggering the starting switch can be improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional perspective view of the present invention.

Fig. 3 is a first perspective view of the pressing alarm mechanism according to the present invention.

Fig. 4 is a schematic view of a second perspective structure of the pressing alarm mechanism of the present invention.

Fig. 5 is a schematic perspective view of the covering presser of the present invention.

Fig. 6 is a schematic perspective view of the control mechanism of the present invention.

Fig. 7 is a first perspective view of the reset mechanism of the present invention.

Fig. 8 is a schematic diagram of a second perspective structure of the resetting mechanism of the invention.

Fig. 9 is a first perspective view of the misleading mechanism of the invention.

Fig. 10 is a perspective view of a second perspective view of the misguiding mechanism of the present invention.

Fig. 11 is a schematic perspective view of the auxiliary pushing mechanism of the present invention.

In the above drawings: 1: support frame, 2: mounting frame, 3: start switch, 4: press alarm mechanism, 41: covering presser, 42: alarm, 43: n-shaped connecting rod, 44: rotating plate, 45: torsion spring, 46: speed reduction block, 47: deceleration spring, 5: control mechanism, 51: push plate, 52: wedge push rod, 53: push spring, 6: reset mechanism, 61: sliding block, 62: sliding connecting rod, 63: pressure spring, 7: misleading mechanism, 71: pressing frame, 72: n-shaped restriction lever, 73: limiting spring, 74: a limiting block, 8: auxiliary pushing mechanism, 81: guide sleeve, 82: an auxiliary push rod.

Detailed Description

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 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.

Example 1

A power switch with an alarm function is shown in figures 1-2 and comprises a support frame 1, a mounting frame 2, a starting switch 3, a pressing alarm mechanism 4 and a control mechanism 5, wherein the mounting frame 2 is welded to the top of the support frame 1, the starting switch 3 is arranged in the middle of the mounting frame 2, the pressing alarm mechanism 4 is arranged on the upper portion of the mounting frame 2, and the control mechanism 5 is arranged on the mounting frame 2.

As shown in fig. 1 to 5, the pressing alarm mechanism 4 includes a covering presser 41, an alarm 42, an n-shaped connecting rod 43, a rotating plate 44, a torsion spring 45 and a speed reduction assembly, the mounting bracket 2 is connected with the covering presser 41 for covering and protecting the starting switch 3 along the periphery in a sliding manner, the alarm 42 is connected to the left and right sides of the upper portion of the mounting bracket 2, the n-shaped connecting rod 43 is connected to the left and right sides of the top of the mounting bracket 2 through bolts, the n-shaped connecting rod 43 is located between the two alarms 42, the rotating plate 44 is connected to the middle of the n-shaped connecting rod 43 in a rotating manner, the covering presser 41 and the rotating plate 44 are in press fit, the torsion springs 45 are connected to the front and back sides of the rotating plate 44 and between the n-shaped connecting rods 43, the torsion springs 45 are respectively wound around the n-shaped connecting rods 43, and the mounting bracket 2 is provided with the speed reduction assembly; the speed reduction subassembly is including speed reduction piece 46 and speed reduction spring 47, and the equal slidingtype in 2 upper portions of mounting bracket left and right sides is connected with a set of speed reduction piece 46, and every group is provided with two speed reduction pieces 46, speed reduction piece 46 and rotor plate 44 contact cooperation, speed reduction piece 46 about both sides respectively with mounting bracket 2 between all be connected with speed reduction spring 47.

As shown in fig. 1, 2 and 6, the control mechanism 5 includes a pushing plate 51, wedge-shaped push rods 52 and pushing springs 53, the left and right sides of the upper portion of the mounting frame 2 are both slidably connected with the two wedge-shaped push rods 52, the wedge-shaped push rods 52 are in press fit with the rotating plate 44, the pushing plate 51 is welded between the outer sides of the adjacent wedge-shaped push rods 52, the pushing springs 53 are wound on the wedge-shaped push rods 52, the outer ends of the pushing springs 53 are connected with the adjacent pushing plate 51, and the inner ends of the pushing springs 53 are connected with the mounting frame 2 respectively.

When the power switch is used, if a non-worker uses the power switch, the covering presser 41 is pressed downwards in a conventional mode, when the covering presser 41 moves downwards to be contacted with the rotating plate 44, the inner side of the rotating plate 44 is driven to swing downwards, the outer side of the rotating plate 44 swings upwards to be contacted with the middle position of the alarm 42, the torsion spring 45 is twisted, the alarm 42 gives an alarm, in addition, after the outer side of the rotating plate 44 is blocked by the middle position of the alarm 42, the rotating plate 44 stops rotating, the rotating plate 44 limits the position of the covering presser 41, so that the covering presser 41 is prevented from continuously moving downwards to trigger the starting switch 3, the non-worker can be prevented from randomly triggering the starting switch 3, the safety of the power switch can be improved, if the worker uses the power switch, the worker firstly moves the push plate 51 to drive the wedge-shaped push rod 52 to move inwards, the pushing spring 53 is compressed, the wedge-shaped push rod 52 can extrude the outer side of the rotating plate 44 to enable the outer side of the rotating plate 44 to swing downwards, the inner side of the rotating plate 44 swings upwards, the torsion spring 45 is twisted, the rotating plate 44 cannot influence the covering presser 41 to move downwards at the moment, then a worker can press the covering presser 41 downwards, further the covering presser 41 presses the starting switch 3 to enable the starting switch 3 to be triggered, in the swinging process of the rotating plate 44, the speed reducing block 46 can be kept in a state of being attached to the rotating plate 44 under the action of the speed reducing spring 47, the speed reducing spring 47 deforms adaptively, when the starting switch 3 needs to be closed, the covering presser 41 can be pulled upwards to reset to release the starting switch 3, then the pushing plate 51 is released, and under the action of the pushing spring 53, the pushing plate 51 and the wedge-shaped push rod 52 are driven to move outwards to reset, after the wedge-shaped push rod 52 loosens the rotating plate 44, the rotating plate 44 is driven to rotate and reset under the action of the torsion spring 45, but the rotating plate 44 can be decelerated under the action of the deceleration spring 47 and the deceleration block 46, so that the rotating plate 44 can be reset slowly, the alarm 42 is prevented from being touched by mistake in the resetting process of the rotating plate 44, and invalid alarm prompt is avoided.

Example 2

On the basis of the embodiment 1, as shown in fig. 2, 7 and 8, the device further includes a reset mechanism 6, which includes sliding blocks 61, sliding connecting rods 62 and pressure springs 63, wherein the sliding blocks 61 are connected to the front and rear sides of the mounting frame 2 in a sliding manner, the sliding blocks 61 are connected to the sliding blocks 61 in a sliding manner, the sliding connecting rods 62 are connected to the sliding blocks 61 in a rotating manner, the upper portions of the sliding connecting rods 62 are connected to the covering presser 41 in a rotating manner, and the pressure springs 63 are connected between the inner sides of the sliding blocks 61 and the mounting frame 2.

Can drive the inboard removal of sliding block 61 through sliding connecting rod 62 when covering presser 41 and moving down for pressure spring 63 is compressed, at this moment, pressure spring 63 can play the buffering and effect of slowing down to covering presser 41, and can let and cover more steady that presser 41 descends, after loosening covering presser 41, under pressure spring 63's effect, can drive sliding block 61 and move to the outside and reset, can drive simultaneously through sliding connecting rod 62 and cover presser 41 automatic rebound and reset.

As shown in fig. 2, 9 and 10, the guiding device further includes a misleading mechanism 7, the misleading mechanism 7 includes a pressing frame 71, limiting blocks 74 and limiting components, the limiting blocks 74 are respectively fastened to the front and rear sides of the lower portion of the covering and pressing device 41, the pressing frame 71 is slidably connected to the upper portion of the covering and pressing device 41, a pressing icon is arranged on the top of the pressing frame 71, and the limiting components are arranged on the mounting frame 2; the limiting assembly comprises an n-shaped limiting rod 72 and a limiting spring 73, the front side and the rear side of the upper portion of the mounting frame 2 are connected with the n-shaped limiting rod 72 in a sliding mode, the top of the n-shaped limiting rod 72 is in contact fit with the bottom of a limiting block 74, four corners of the lower portion of the n-shaped limiting rod 72 are arranged in an inclined plane mode, and the limiting spring 73 is connected between the left side and the right side of the n-shaped limiting rod 72 and the mounting frame 2.

When a person uses a power switch, the following three situations can exist: firstly, when a non-worker triggers the starting switch 3, the non-worker can know through pressing an icon to press the pressing frame 71, so that the pressing frame 71 moves downwards, the pressing frame 71 drives the n-shaped limiting rod 72 to move outwards, the limiting spring 73 is compressed, the starting switch 3 is not triggered at the moment, the non-worker cannot trigger the starting switch 3, then the pressing frame 71 is loosened, the n-shaped limiting rod 72 is driven to reset under the action of the limiting spring 73, and the pressing frame 71 is driven to move upwards to reset due to inclined planes arranged at four corners of the lower part of the pressing frame 71; secondly, if the worker presses the pressing frame 71 when triggering the start switch 3, and then the n-shaped limiting rod 72 does not limit the position of the limiting block 74, the worker knows that the covering presser 41 can be moved downward to trigger the start switch 3, but the worker cannot know the step of triggering the start switch 3 and performs an invalid operation by pressing the icon; thirdly, when the person accidentally touches the covering and pressing device 41, the limiting block 74 limits the n-shaped limiting rod 72, so that the covering and pressing device 41 cannot move downwards, the alarm 42 can be prevented from giving an alarm, the trouble of the worker can be reduced, and the safety of the power switch can be improved.

As shown in fig. 2 and 11, the device further comprises an auxiliary pushing mechanism 8, the auxiliary pushing mechanism 8 comprises a guide sleeve 81 and an auxiliary push rod 82, the guide sleeve 81 is symmetrically welded to the left side and the right side of the upper portion of the mounting frame 2, the auxiliary push rod 82 is slidably connected to the guide sleeve 81, and the outer side of the auxiliary push rod 82 is connected to the adjacent push plate 51.

Can drive auxiliary push rod 82 inwards moving when the staff will promote board 51 to the inboard removal, make auxiliary push rod 82 with n shape restriction pole 72 outwards promote no longer to restrict limiting block 74, so can release and cover presser 41, so that the staff presses and covers presser 41, then can drive auxiliary push rod 82 outwards to remove when promoting board 51 outwards removes and resets, and then make n shape restriction pole 72 inwards remove and reset and restrict limiting block 74 again, above operation can learn, when the staff presses promoting board 51, realize the effect that automatic release covers presser 41, so can improve the efficiency that triggers starting switch 3.

The present application is described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A power switch with an alarm function comprises a support frame (1), a mounting frame (2) and a starting switch (3), wherein the mounting frame (2) is arranged on the support frame (1), the starting switch (3) is connected onto the mounting frame (2), and the power switch is characterized by further comprising a pressing alarm mechanism (4) and a control mechanism (5), the pressing alarm mechanism (4) for alarming when the power switch is abnormally used is arranged on the upper portion of the mounting frame (2), the pressing alarm mechanism (4) comprises a covering presser (41), an alarm (42), a rotating assembly and a speed reducing assembly, the covering presser (41) is connected onto the mounting frame (2) in a sliding mode along the periphery, the covering pressing device (41) is used for covering the starting switch (3) and protecting the starting switch (3), the left side and the right side of the upper part of the mounting frame (2) are both connected with the alarm (42), the left side and the right side of the top of the mounting frame (2) are both provided with the rotating components, the mounting frame (2) is provided with the speed reducing components, when the covering pressing device (41) is simply pressed, the rotating components rotate to extrude the alarm (42) to send out an alarm for reminding, the mounting frame (2) is provided with the control mechanism (5), when the power switch is normally started, the control mechanism (5) extrudes the rotating components to move towards the inner side to reversely rotate to be far away from the alarm (42), and then the covering pressing device (41) is pressed to normally open the starting switch (3), after the control mechanism (5) is loosened, the speed reduction assembly reduces the speed of resetting the rotating assembly, and the rotating assembly in the resetting process is not contacted with the alarm (42); the rotating assembly comprises an n-shaped connecting rod (43), a rotating plate (44) and a torsion spring (45), the left side and the right side of the top of the mounting rack (2) are respectively connected with the n-shaped connecting rod (43) through bolts, the n-shaped connecting rod (43) is positioned between the two alarms (42), the middle part of the n-shaped connecting rod (43) is respectively and rotatably connected with the rotating plate (44), the covering presser (41) and the rotating plate (44) are in press fit, the torsion spring (45) is respectively connected between the front side and the rear side of the rotating plate (44) and the n-shaped connecting rod (43), the torsion spring (45) is respectively wound on the n-shaped connecting rod (43), and when the covering presser (41) moves downwards to contact the rotating plate (44), the outer side of the rotating plate (44) swings upwards to trigger the alarms (42) to send alarms; the speed reducing assembly comprises a speed reducing block (46) and a speed reducing spring (47), the left side and the right side of the upper part of the mounting rack (2) are connected with a group of speed reducing blocks (46) used for reducing the speed of the rotating plate (44) in a sliding mode, the speed reducing blocks (46) are in contact fit with the rotating plate (44), and the speed reducing spring (47) is connected between the upper side and the lower side of each speed reducing block (46) and the mounting rack (2); control mechanism (5) are including sluicing (51), wedge push rod (52) and push spring (53), mounting bracket (2) upper portion left and right sides all sliding type connection has wedge push rod (52) of at least one wedge face towards close rotor plate (44) one side, wedge push rod (52) and rotor plate (44) extrusion fit, all weld sluicing (51) of rectangle between close wedge push rod (52) the outside so that press, press pushing plate (51) inboard and drive wedge push rod (52) and move extrusion rotor plate (44) outside and rotate downwards and keep away from alarm (42), all around having pushed spring (53) on wedge push rod (52), it is connected with close sluicing (51) to push spring (53) outer end, push spring (53) inner is connected with mounting bracket (2) respectively.

2. The power switch with the alarm function as claimed in claim 1, further comprising a reset mechanism (6) for driving the covering presser (41) to automatically reset, wherein the reset mechanism (6) comprises a sliding block (61), a sliding connecting rod (62) and a pressure spring (63), the sliding block (61) is slidably connected to the front side and the rear side of the mounting frame (2) in a bilateral symmetry manner, the sliding connecting rod (62) is rotatably connected to the sliding block (61), the upper portion of the sliding connecting rod (62) is rotatably connected to the covering presser (41), and the pressure spring (63) is respectively connected between the inner side of the sliding block (61) and the mounting frame (2).

3. The power switch with the alarm function as claimed in claim 1, further comprising a misleading mechanism (7) for misleading invalid triggering of non-working personnel, wherein the misleading mechanism (7) comprises a pressing frame (71), a limiting block (74) and a limiting component, the limiting block (74) is connected to the front side and the rear side of the lower portion of the covering presser (41), the pressing frame (71) is connected to the upper portion of the covering presser (41) in a sliding manner, a pressing icon is arranged on the top of the pressing frame (71) and used for misleading the non-working personnel to press the pressing frame (71), and the limiting component used for limiting the downward movement of the covering presser (41) is arranged on the mounting frame (2).

4. The power switch with the alarm function as claimed in claim 3, wherein the limiting assembly comprises an n-shaped limiting rod (72) and a limiting spring (73), the front side and the rear side of the upper portion of the mounting frame (2) are both connected with the n-shaped limiting rod (72) in a sliding mode, the top of the n-shaped limiting rod (72) is in contact fit with the bottom of the limiting block (74), four corners of the lower portion of the n-shaped limiting rod (72) are both arranged in an inclined plane, the limiting springs (73) are connected between the left side and the right side of the n-shaped limiting rod (72) and the mounting frame (2), and the limiting block (74) is not limited when the n-shaped limiting rod (72) moves outwards when the pressing frame (71) moves downwards.

5. The power switch with the alarm function as claimed in claim 4, further comprising an auxiliary pushing mechanism (8) for assisting the n-shaped limiting rod (72) to push outwards, wherein the auxiliary pushing mechanism (8) comprises a guide sleeve (81) and an auxiliary push rod (82), the guide sleeve (81) is welded symmetrically on the left side and the right side of the upper portion of the mounting frame (2) in a front-back manner, the auxiliary push rod (82) is connected to the guide sleeve (81) in a sliding manner, the outer side of the auxiliary push rod (82) is connected with the adjacent push plate (51) respectively, the push plate (51) moves inwards to drive the auxiliary push rod (82) to push inwards, and the auxiliary push rod (82) pushes the n-shaped limiting rod (72) outwards.