CN114682842A

CN114682842A - Foldable sawing machine with safety device

Info

Publication number: CN114682842A
Application number: CN202011559882.7A
Authority: CN
Inventors: 魏启宏; 林岳仪; 黄信豪
Original assignee: Rexon Industrial Corp Ltd
Current assignee: Rexon Industrial Corp Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-07-01

Abstract

A foldable sawing machine with a safety device comprises a base unit and a sawing unit. The base unit is provided with a working surface and a shaft seat. The shaft seat is provided with a folding axis. The sawing unit comprises a rotating piece, a supporting arm, a saw blade, a handle, a driving module and a safety module. The safety module is provided with a safety switch and a safety piece. The safety member has a pivoted end and a free end. The rotating member can rotate to drive the saw blade to rotate between a working position and a retracted position. The saw bit by the operating position rotates to during the position is closed to receipts, the saw bit with produced rotation contained angle between the working face reduces gradually, just free end can receive the action of gravity and rotate downwards, makes the safety part rotates to the touch position of preventing by the touch position. In the accessible position, the safety switch can be operated. In the touch-proof position, the free end portion approaches the safety switch relatively to prevent the safety switch from being operated.

Description

Foldable sawing machine with safety device

Technical Field

The present invention relates to a sawing device, and more particularly, to a foldable sawing machine with a safety device.

Background

An existing sawing machine comprises a base unit, a workbench which can be rotatably arranged on the base unit, and a sawing unit which is arranged on the workbench. The saw cutting unit is provided with a supporting arm pivoted on the workbench, a saw blade pivoted on the supporting arm, a driving piece arranged on the supporting arm, a handle arranged on the supporting arm and a switch grip arranged on the handle. The switch handle can be operated to start the power supply of the driving piece so as to drive the saw blade to rotate.

When the existing sawing machine is used, a user needs to place an article on the workbench, then holds and applies force to the handle to drive the supporting arm to rotate, so that the saw blade approaches the article downwards, and simultaneously presses the switch handle to start the power supply of the driving piece, so that the saw blade rotates to saw the article. After the article is sawed, the user needs to apply force to the handle to drive the saw blade to move upwards away from the article, and the switch handle is released to stop the saw blade from rotating.

However, the existing saw cutting machine occupies a large space and is not suitable for carrying when not in use, and when a user needs to move the existing saw cutting machine, the user often holds the hand on the handle in order to apply force, if the user forgets to pull out the power supply plug and accidentally touches the switch grip arranged on the handle, the saw blade is started, so the saw cutting machine is quite dangerous, and some existing saw cutting machines on the market change the power supply source from the traditional plug-in type to the rechargeable battery, so the situation that the saw blade is mistakenly started is more likely to occur, and the need for improvement is needed.

Although some existing sawing machines are provided with a pivot seat installed between the worktable and the supporting arm, when the existing sawing machines are not used, the supporting arm and the saw blade can be rotated to a position close to the worktable to reduce the storage volume, the problem that the switch handle is easy to touch by mistake during transportation to cause danger can not be solved, and therefore improvement is needed.

Disclosure of Invention

The invention aims to provide a foldable sawing machine with a safety device, which can prevent a saw blade from rotating by mistakenly touching during transportation.

The invention discloses a foldable sawing machine with a safety device, which comprises a base unit and a sawing unit, wherein the base unit is provided with a working surface which is substantially horizontal and a shaft seat connected with the working surface. The shaft seat is provided with a folding axis parallel to the working surface. The sawing unit comprises a rotating piece, a supporting arm, a saw blade, a handle, a driving module and a safety module, wherein the rotating piece can be rotatably arranged on the shaft seat around the folding axis, the supporting arm is pivoted to the rotating piece, the saw blade is pivoted to the supporting arm, the handle is connected to the supporting arm, the driving module can be operated to drive the saw blade to rotate, and the safety module is arranged on the handle. The safety module is provided with a safety switch and a safety piece adjacent to the safety switch. When the safety switch is operated, the driving module can be operated to drive the saw blade to rotate. When the safety switch is not operated, the driving module can not drive the saw blade to rotate. The safety member has a pivoted end portion pivoted to the handle, and a free end portion opposite to the pivoted end portion.

The rotating piece can rotate around the folding axis relative to the shaft seat so as to drive the saw blade to rotate between a working position and a folding position relative to the working surface. In the working position, the saw blade is relatively far away from the working surface. In the retracted position, the saw blade is relatively close to the work surface.

The saw bit by the operating position rotates to during the position is received to receipts, the saw bit with produced rotation contained angle between the working face reduces gradually, just the safety part free end portion can receive the action of gravity and rotate downwards, makes the safety part for safety switch rotates to the protection and touches the position by touchable position. In the accessible position, the free end is relatively far from the safety switch to enable the safety switch to be operated. In the touch-proof position, the free end portion approaches the safety switch relatively to prevent the safety switch from being operated.

The invention relates to a foldable sawing machine with a safety device, wherein the sawing unit further comprises a limiting part arranged on the handle. The limiting part corresponds to the free end part of the safety piece, and when the safety piece is in the touch prevention position, the free end part of the safety piece can be removably positioned with the limiting part.

The invention relates to a foldable sawing machine with a safety device, wherein a limiting part of a sawing unit is provided with a magnetic part made of a magnetic substance. The free end of the security member has a magnetic region made of a magnetic substance. The magnetic part and the magnetic area are magnetically attracted.

The invention relates to a foldable sawing machine with a safety device, wherein when the safety piece is in the touch-proof position, the safety piece at least partially shields a safety switch so that the safety switch cannot be operated.

The invention discloses a foldable sawing machine with a safety device, which is characterized in that a saw blade rotates along a first direction from a working position to a foldable position. The pin joint end part and the free end part of the safety piece are arranged at intervals along the first direction, and the safety piece rotates along the first direction from the touch position to the touch-proof position.

The invention relates to a foldable sawing machine with a safety device, wherein a safety switch of a sawing unit is provided with a pivoting part pivoted on a handle, and an operating part and a stopping part which are arranged around the pivoting part at intervals. The driving module is provided with a driving handle pivoted on the handle and a driving piece which can be started by the driving handle to enable the saw blade to rotate. The operating part of the safety switch can be operated to drive the stopping part to rotate between a clamping position and a releasing position relative to the driving handle. When the clamping position is reached, the stopping part is abutted against the driving handle, so that the driving handle is relatively far away from the driving piece. When the stopping part is at the releasing position, the stopping part is far away from the driving handle, so that the driving handle can approach the driving piece to start the power supply of the driving piece.

The invention relates to a foldable sawing machine with a safety device, wherein the safety module is also provided with a safety elastic piece which is arranged on the handle and is adjacent to the safety switch. The safety spring enables the stop to maintain a tendency toward the detent position.

The invention relates to a foldable sawing machine with a safety device, wherein a driving handle of a sawing unit is provided with a connecting part pivoted on a handle, a swinging part opposite to the connecting part, and a braking part arranged between the connecting part and the swinging part. When the stopping part of the safety switch is at the clamping position, the stopping part is abutted against the swinging part to enable the swinging part not to rotate towards the direction of the driving part, and the stopping part is relatively far away from the driving part. When the stopping part is at the release position, the stopping part is far away from the swinging part, and the swinging part can be operated to rotate towards the driving part, so that the stopping part can be abutted against the driving part to start the power supply of the driving part.

The invention has the beneficial effects that: because when the safety switch was not operated, the drive module can not drive the saw bit rotates, and because the saw bit by during the operating position rotated to the position is closed to receipts, the safety part can by free position removes to the block position makes safety switch can not be operated, consequently even the area enables the drive module can not drive the saw bit rotates and can avoid receiving when carrying the mistake and touch and make the saw bit rotate.

Drawings

FIG. 1 is a perspective assembly view of one embodiment of the retractable sawing machine with safety device of the present invention;

FIG. 2 is an exploded perspective view of the embodiment;

FIG. 3 is a right side view of a drive module, a security module, and one of the housing portions of the embodiment;

FIG. 4 is a top view illustrating a saw blade of the embodiment capable of sawing an article in a 90 degree orientation;

FIG. 5 is a view similar to FIG. 4, illustrating that the saw blade can saw the article in a 45 degree orientation;

FIG. 6 is a schematic view illustrating a safety member in a accessible position and a safety switch operable when the saw blade is in an operative position relative to a work surface;

FIG. 7 is a view similar to FIG. 6, illustrating the safety member in the accessible position when an included angle of rotation between the blade and the work surface is 45 degrees;

FIG. 8 is another view similar to FIG. 6, showing the security member in the accessible position with the included angle of rotation at 30 degrees;

FIG. 9 is yet another view similar to FIG. 6, illustrating the safety member in a touch-proof position with the saw blade in a stowed position relative to the work surface and the safety member partially covering the safety switch;

fig. 10 is a perspective assembly view illustrating a collapsed state of the embodiment.

Detailed Description

The present invention will be described in detail below with reference to the drawings and examples.

Referring to fig. 1, 2 and 3, an embodiment of the foldable sawing machine with a safety device of the present invention is suitable for sawing a workpiece 1. The foldable sawing machine with the safety device comprises a base unit 2 and a sawing unit 3.

The base unit 2 includes a base 21, two footstands 22 respectively disposed on two opposite sides of the base 21, a worktable 23 rotatably disposed on the base 21, a backup plate 24 disposed between the footstands 22 and above the worktable 23 and adapted to be abutted by the workpiece 1, and a fixing module 25 connected between the base 21 and the worktable 23 to position the worktable 23 relative to the base 21.

The table 23 is connected to the sawing unit 3 and has a substantially horizontal working surface 231 adapted to receive the work piece 1 and a spindle base 232 connected to the working surface 231. The axle seat 232 defines a fold axis L1 parallel to the working surface 231.

The sawing unit 3 includes a rotating member 31 rotatably disposed on the shaft seat 232 around the folding axis L1, a supporting arm 32 pivotally connected to the rotating member 31, a saw blade 33 pivotally disposed on the supporting arm 32 and adapted to saw the workpiece 1, a handle 34 connected to the supporting arm 32, a driving module 35 operable to drive the saw blade 33 to rotate, a safety module 36 disposed on the handle 34, a limiting portion 37 disposed on the handle 34 and corresponding to the safety module 36, and a positioning module 38 connected between the rotating member 31 and the shaft seat 232. In this embodiment, the sawing unit 3 further includes a battery module (not shown) disposed on the supporting arm 32.

The support arm 32 can rotate relative to the rotary member 31 about a sawing axis L2 perpendicular to the retraction axis L1 and parallel to the working surface 231. The handle 34 is forced to drive the supporting arm 32 and the saw blade 33 to rotate around the sawing axis L2, so that the saw blade 33 can approach the workpiece 1 placed on the working surface 231 downwards, and the purpose of sawing the workpiece 1 is achieved.

The positioning module 38 has a fixed plate 381 disposed on the shaft seat 232, a fixed hole 382 penetrating through the fixed plate 381, a working groove 383 and a folding hole 384 penetrating through the fixed plate 381 and disposed at intervals around the folding axis L1, a rotating plate 385 disposed on the rotating member 31, an arc-shaped groove 386 penetrating through the rotating plate 385, a positioning hole 387 penetrating through the rotating plate 385, a guiding pin 388 penetrating through the arc-shaped groove 386 and the fixed hole 382, and a fixing pin 389 penetrating through the positioning hole 387. The fixing pin 389 is operable to alternatively pass through the working groove 383 and the folding hole 384, and is also operable to be separated from the working groove 383 and the folding hole 384.

The handle 34 has two opposite shell portions 341 and a chamber 342 defined by the shell portions 341.

The driving module 35 has a driving handle 351 pivotally disposed on the handle 34, a driving member 352 disposed in the accommodating chamber 342 and powered by the driving handle 351 to rotate the saw blade 33, and a driving elastic member 353 disposed on the handle 34 and located in the accommodating chamber 342 and adjacent to the driving handle 351. In this embodiment, the power source of the driving member 352 is from the battery module.

The driving handle 351 has a connecting portion 354 pivotally connected to the handle 34 and located in the accommodating chamber 342, a swinging portion 355 opposite to the connecting portion 354 and partially exposed out of the housing 341, and an actuating portion 356 disposed between the connecting portion 354 and the swinging portion 355 and located in the accommodating chamber 342. When the force is applied to the swinging portion 355 and the pulling portion 356 is driven to contact the driving member 352, the power of the driving member 352 can be turned on. The driving elastic member 353 can maintain the stopper portion 356 away from the driving member 352.

The safety module 36 includes a safety switch 361 partially disposed in the accommodating chamber 342 and partially exposed out of the housing 341, a safety member 362 disposed in the housing 341 and adjacent to the safety switch 361, and a safety elastic member 363 disposed in the handle 34 and located in the accommodating chamber 342 and adjacent to the safety switch 361. When the safety switch 361 is operated, the driving module 35 can be operated to drive the saw blade 33 to rotate. When the safety switch 361 is not operated, the driving module 35 cannot drive the saw blade 33 to rotate.

The safety switch 361 has a pivot portion 364 pivotally mounted on the handle 34, and an operating portion 365 and a stopper portion 366 spaced around the pivot portion 364. The pivot 364 and the stop 366 are disposed in the housing 342. The operating portion 365 is partially exposed out of the shell portion 341. The safety elastic member 363 keeps the stopper 366 trending toward the swing portion 355.

The safety member 362 has a pivoted end 367 pivoted to one of the shell portions 341 of the handle 34, and a free end 368 opposite to the pivoted end 367. The free end portion 368 has a magnetic region 369 made of a magnetic substance. The safety member 362 corresponds to the operating portion 365 and can be operated to at least partially shield the operating portion 365.

The position-limiting portion 37 is disposed outside one of the shell portions 341, corresponds to the free end portion 368 of the safety member 362, and has a magnetic member 371 made of a magnetic substance. The magnetic element 371 and the magnetic region 369 magnetically attract each other.

Referring to fig. 1, 2, 4 and 5, the operation of the foldable sawing machine with safety device will be described.

The working table 23 can rotate relative to the base 21 to rotate the sawing unit 3 relative to the backup plate 24, so that the sawing direction of the saw blade 33 can be adjusted. For example, when the working table 23 is driven to rotate the sawing unit 3 to the position shown in fig. 4, the workpiece 1 is abutted against the backup plate 24, the saw blade 33 is operated to rotate towards the lower left side shown in fig. 1, so that the workpiece 1 can be sawn in the direction of 90 degrees, and when the working table 23 is driven to rotate the sawing unit 3 to the position shown in fig. 5, the workpiece 1 is abutted against the backup plate 24, and the saw blade 33 is operated to rotate, so that the workpiece 1 can be sawn in the direction of 45 degrees.

Referring to fig. 2, 6 to 9, when the fixing pin 389 is operated to be away from the working groove 383 and the folding hole 384, the rotating member 31 can rotate around the folding axis L1 relative to the axle seat 232, and the rotating plate 385 is driven to rotate relative to the guiding pin 388.

Fig. 6 to 9 sequentially show the rotation process of the rotating member 31 about the retracting axis L1 relative to the shaft seat 232, and it should be noted that, for clarity, the operation relationship between the rotating plate 385 and the guiding pin 388 during the rotation process is illustrated, so that in fig. 6 to 9, the working surface 231 is indicated by a two-point chain line, and a part of the components of the base unit 2 and the fixed plate 381 are removed.

During the rotation of the rotating member 31 around the retracting axis L1 relative to the shaft seat 232, since the guiding pin 388 is disposed through the arc-shaped slot 386, the rotation arc of the rotating member 31 around the retracting axis L1 relative to the shaft seat 232 can be limited, and the saw blade 33 can be driven to rotate between a working position (see fig. 6) and a retracting position (see fig. 9) relative to the working surface 231. The included angle between the saw blade 33 and the working surface 231 is defined as a rotation included angle θ. During the period that the saw blade 33 rotates from the working position to the folding position, the included angle θ gradually decreases.

In the retracted position (see fig. 9, partial components see fig. 2), the saw blade 33 approaches the working surface 231 relatively and is substantially parallel to the working surface 231, and the fixing pin 389 corresponds to and can be inserted into the retraction hole 384. When the fixing pin 389 is inserted into the folding hole 384, the saw blade 33 is positioned with respect to the working surface 231.

In the working position (see fig. 6, some components are shown in fig. 2), the saw blade 33 is suspended above the working surface 231 and relatively far away from the working surface 231, and the fixing pin 389 corresponds to and can be inserted into the working groove 383.

In this embodiment, in the working position (see fig. 6), the included angle θ is 90 degrees, and when the fixing pin 389 is inserted into the working groove 383, the rotating member 31 can rotate around the retracting axis L1 relative to the shaft seat 232 to rotate the saw blade 33 relative to the working surface 231 by about 45 degrees (not shown) from the working position toward a direction opposite to the retracting position, so as to adjust a cutting angle of the saw blade 33, but is not limited thereto.

Referring to fig. 3, 6-9, the operating portion 365 of the safety switch 361 can be operated to rotate the stopping portion 366 relative to the driving handle 351 between a locking position (see fig. 3, solid line position) and a release position (see fig. 3, phantom line position). In this embodiment, the safety elastic member 363 can maintain the tendency of the stopper 366 toward the locking position, so that when the operating portion 365 is not applied with force, the stopper 366 is located at the locking position, and when the operating portion 365 is pressed, the stopper 366 rotates to the release position.

In the locking position (see the solid line position in fig. 3), the stopping portion 366 abuts against the swinging portion 355 of the driving handle 351, so that the swinging portion 355 cannot rotate towards the driving element 352, and the stopping portion 356 of the driving handle 351 is relatively far away from the driving element 352, and the power supply of the driving element 352 cannot be started.

In the release position (see the phantom line position in fig. 3), the stopping portion 366 is away from the swinging portion 355 of the driving grip 351, such that the swinging portion 355 of the driving grip 351 can be operated to rotate towards the driving member 352 to enable the stopping portion 356 to approach and abut against the driving member 352 to activate the power source of the driving member 352.

During the rotation of the saw blade 33 from the working position (see fig. 6) to the retracted position (see fig. 9), the included angle θ gradually decreases, the free end portion 368 of the safety member 362 can rotate downward under the action of gravity, and the safety member 362 rotates from a contact position to a contact-preventing position relative to the safety switch 361. In this embodiment, the safety member 362 rotates from the contact position to the contact-preventing position only when the rotation angle θ between the saw blade 33 and the working surface 231 is smaller than 30 degrees, but not limited thereto, the rotation angle θ corresponding to the rotation of the safety member 362 from the contact position to the contact-preventing position may be adjusted according to different requirements (for example, by adjusting the position and the inclination direction of the safety member 362, adding a weight to the free end portion 368, etc.).

In the accessible position (see fig. 6 and 7), the free end 368 of the safety member 362 is relatively far from the safety switch 361 such that the safety switch 361 can be operated.

In the contact-proof position (see fig. 9), the free end portion 368 of the safety member 362 approaches the safety switch 361 relatively, the free end portion 368 is removably positioned with the position-limiting portion 37, and the safety member 362 at least partially shields the safety switch 361 such that the operating portion 365 of the safety switch 361 cannot be operated. In this embodiment, the free end portion 368 is magnetically attracted to the position-limiting portion 37 by the magnetic region 369 (see fig. 2) and the magnetic member 371 (see fig. 2), and the safety member 362 is configured to shield the operation portion 365 of the safety switch 361 such that the operation portion 365 cannot be pressed, but is not limited thereto.

It is defined that the saw blade 33 rotates in a first direction I from the working position to the retracted position, the pivoted end 367 and the free end 368 of the safety member 362 are spaced apart in the first direction I, and the safety member 362 rotates in the first direction I from the touch position to the touch-proof position.

Referring to fig. 2, 4 to 7, when a user uses the foldable sawing machine with safety device, firstly, the working table 23 is operated to rotate relative to the base 21 to drive the saw blade 33 of the sawing unit 3 to rotate to a predetermined cutting direction (for example, the cutting direction shown in fig. 4 or 5), then the saw blade 33 is rotated to the working position, the fixing pin 389 is inserted into the working groove 383, and the workpiece 1 is placed on the working surface 231 and abuts against the backup plate 24, so as to start sawing the workpiece 1.

Referring to fig. 2, 3 and 6, when sawing the workpiece 1, first, the safety member 362 must be rotated to the accessible position, and then a force is applied to the handle 34 to drive the saw blade 33 downward to approach the workpiece 1 placed on the working surface 231. While driving the saw blade 33 to approach the workpiece 1 downward, the user needs to press the operating portion 365 of the safety switch 361 first to rotate the stopping portion 366 to the release position, and then presses the swinging portion 355 of the driving handle 351 to enable the stopping portion 356 to approach and abut against the driving member 352 to start the power supply of the driving member 352, so as to drive the saw blade 33 to rotate and saw the workpiece 1.

Referring to fig. 2, 5 and 9, when the foldable sawing machine with the safety device is to be folded, the user needs to first operate to rotate the working table 23 relative to the base 21 to drive the saw blade 33 of the sawing unit 3 to rotate to the position shown in fig. 5, and then rotate the saw blade 33 to the folded position, and insert the fixing pin 389 into the folding hole 384 to complete folding.

Referring to fig. 1 and 10, fig. 1 shows the foldable sawing machine with safety device in a state before being folded, and fig. 10 shows the foldable sawing machine with safety device in a state after being folded, the foldable sawing machine with safety device in fig. 10 has a smaller overall volume than that in fig. 1, so that the storage volume can be reduced, and the sawing unit 3 is substantially horizontally arranged to approach the base unit 2, which is not only beneficial for packaging, but also can avoid damage during transportation.

Referring to fig. 2, 3, 6 and 9, in the folding process, because the safety elastic element 363 of the safety module 36 can keep the stopping part 366 of the safety switch 361 tending to face the locking position, when no force is applied to the safety switch 361, the stopping part 366 is kept at the locking position, so that the stopping part 356 of the driving handle 351 is relatively far away from the driving part 352 and the power of the driving part 352 cannot be started, that is, the user needs to press the operating part 365 of the safety switch 361 and apply a force to the swinging part 355 of the driving handle 351 to start the power of the driving part 352, thereby reducing the situation that the saw blade 33 is mistakenly triggered to rotate in the folding process of the foldable sawing machine with the safety device.

In addition, during the period that the saw blade 33 rotates from the working position to the retracted position, the safety member 362 can rotate downward to the touch-proof position under the action of gravity, so once the blade is retracted, the safety member 362 can automatically reach the touch-proof position, and the user can be completely prevented from mistakenly triggering to rotate the saw blade 33 after the blade is retracted or during subsequent transportation.

It should be noted that in this embodiment, the power source of the driving member 352 is from the battery module, so that the user can not avoid the rotation of the saw blade 33 by the mistake triggering after the folding process or during the subsequent transportation process only by the design that the safety member 362 automatically rotates to the touch-preventing position during the folding process instead of the mistake triggering by the battery module. In an implementation aspect where other power sources are from the power supply plug, the safety member 362 may also be designed to automatically rotate to the touch-prevention position during the folding process, so that the situation of false triggering caused by forgetting to pull out the power supply plug after the user folds the power supply plug can be avoided.

In summary, according to the foldable sawing machine with safety device of the present invention, by providing the safety switch 361, when no force is applied to the safety switch 361, the stopping portion 366 is kept at the locking position, so that the stopping portion 356 of the driving handle 351 is relatively far away from the driving member 352 and the power of the driving member 352 cannot be started, thereby reducing the situation of the rotation of the saw blade 33 caused by the false triggering during the process of folding the foldable sawing machine with safety device, and by providing the safety member 362, during the period of the rotation of the saw blade 33 from the working position to the folding position, the safety member 362 can automatically rotate to the anti-touch position, so that the safety switch 361 cannot be operated, thereby preventing the driving module 35 from driving the saw blade 33 to rotate and preventing the saw blade 33 from being mistakenly touched during the transportation after folding, therefore, the object of the present invention can be achieved.

However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all simple equivalent changes and modifications made according to the scope of the present invention and the contents of the specification are included in the scope of the present invention.

Claims

1. A foldable sawing machine with a safety device comprises a base unit and a sawing unit, wherein the base unit is provided with a substantially horizontal working surface and a shaft seat connected to the working surface, the shaft seat is provided with a foldable axis parallel to the working surface, and the foldable sawing machine is characterized in that: the sawing unit comprises a rotating part which can be rotatably arranged on the shaft seat around the folding axis, a supporting arm pivoted to the rotating part, a saw blade pivoted to the supporting arm, a handle connected to the supporting arm, a driving module which can be operated to drive the saw blade to rotate, and a safety module arranged on the handle, wherein the safety module is provided with a safety switch and a safety part adjacent to the safety switch, when the safety switch is operated, the driving module can be operated to drive the saw blade to rotate, when the safety switch is not operated, the driving module can not drive the saw blade to rotate, the safety part is provided with a pivoting end part pivoted to the handle and a free end part opposite to the pivoting end part,

the rotating piece can rotate around the folding axis relative to the shaft seat to drive the saw blade to rotate relative to the working surface between a working position and a folding position, the saw blade is relatively far away from the working surface when the working position is adopted, the saw blade is relatively close to the working surface when the folding position is adopted,

during the period that the saw blade rotates from the working position to the folding position, a rotating included angle generated between the saw blade and the working surface is gradually reduced, the free end part of the safety piece can rotate downwards under the action of gravity, so that the safety piece rotates from a contact position to a touch prevention position relative to the safety switch, when the free end part is at the contact position, the free end part is relatively far away from the safety switch, so that the safety switch can be operated, and when the free end part is at the touch prevention position, the free end part relatively approaches the safety switch, so that the safety switch cannot be operated.

2. A foldable saw cutter with safety device as claimed in claim 1, wherein: the sawing unit further comprises a limiting portion arranged on the handle, the limiting portion corresponds to the free end portion of the safety piece, and when the safety piece is in the touch prevention position, the free end portion of the safety piece can be removably positioned with the limiting portion.

3. The retractable sawing machine with safety device as claimed in claim 2, wherein: the limiting part of the sawing unit is provided with a magnetic part made of a magnetic substance, the free end part of the safety part is provided with a magnetic area made of the magnetic substance, and the magnetic part and the magnetic area are attracted magnetically.

4. A foldable sawing machine with safety device according to claim 3 characterised in that: when the safety member is in the touch-proof position, the safety member at least partially shields the safety switch from being operated.

5. A foldable saw cutter with safety device as claimed in claim 2, wherein: the saw blade is defined to rotate along a first direction during the period from the working position to the folding position, the pivoting end part and the free end part of the safety piece are arranged at intervals along the first direction, and the safety piece rotates along the first direction during the period from the touch position to the touch-proof position.

6. A foldable saw cutter with safety device as claimed in claim 2, wherein: the safety switch of the sawing unit is provided with a pivot part pivoted on the handle, an operating part and a stopping part which are arranged at intervals around the pivot part, the driving module is provided with a driving handle pivoted on the handle and a driving part which can be started by the driving handle to enable the saw blade to rotate, the operating part of the safety switch can be operated to drive the stopping part to rotate between a clamping position and a releasing position relative to the driving handle, the stopping part is abutted against the driving handle in the clamping position to enable the driving handle to be relatively far away from the driving part, and the stopping part is far away from the driving handle in the releasing position to enable the driving handle to approach the driving part to start the power supply of the driving part.

7. The retractable sawing machine with safety device as claimed in claim 6, wherein: the safety module also has a safety spring disposed on the handle adjacent the safety switch, the safety spring enabling the detent to remain oriented toward the detent position.

8. The retractable sawing machine with safety device as claimed in claim 6, wherein: the driving handle of the sawing unit is provided with a connecting portion pivoted to the handle, a swinging portion opposite to the connecting portion, and a braking portion arranged between the connecting portion and the swinging portion, the stopping portion of the safety switch is arranged at the clamping position, the stopping portion abuts against the swinging portion to enable the swinging portion not to rotate towards the direction of the driving piece, the braking portion is relatively far away from the driving piece, the stopping portion is arranged at the releasing position and far away from the swinging portion, the swinging portion can be operated towards the driving piece to rotate, and the braking portion can abut against the driving piece to start the power supply of the driving piece.