CN207309881U - It is a kind of can automatic identification drill bit Multifunctional electric device and electric tool - Google Patents
It is a kind of can automatic identification drill bit Multifunctional electric device and electric tool Download PDFInfo
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- CN207309881U CN207309881U CN201721065512.1U CN201721065512U CN207309881U CN 207309881 U CN207309881 U CN 207309881U CN 201721065512 U CN201721065512 U CN 201721065512U CN 207309881 U CN207309881 U CN 207309881U
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Abstract
The utility model embodiment disclose it is a kind of can automatic identification drill bit Multifunctional electric device and electric tool.It is a kind of can automatic identification drill bit Multifunctional electric device, control system including apparatus main body and in apparatus main body, the front end of apparatus main body is equipped with clamping device, clamping device is used to be detachably connected with drill bit, wherein, control system includes master controller and the radio frequency identification card reader, electric clutch and the motor that are connected respectively with master controller.By the above-mentioned means, the utility model embodiment is capable of the operating mode of automatic identification drill bit and switches the work pattern of electric device, and it is easy to operate, safe and reliable, avoid that unsafe incidents occur because of misoperation.
Description
Technical field
The utility model embodiment is related to field of power tools, more particularly to it is a kind of can automatic identification drill bit it is multi-functional
Electric device and multi-functional electric tools.
Background technology
In field of power tools, the species of electric tool is various, and kind is also various, but most of electric tools all only have
, to meet people's demand used in everyday, there are the electric tool of multi-functional machine, but these currently on the market in simple function
The electric tool intelligence degree of multi-functional machine is relatively low, uses cumbersome, easily goes wrong.
Such as, multifunctional electric hammer electric tool, not only with electric hammer operation function, also has electric drill and electric pick operation function, no
Same operation function or work pattern, is required for corresponding drill bit to work together.For operator, it is first
The drill bit of selection operation is needed, and is installed on the collet of the electric device of electric tool, then passes through the electric device
The switch of a upper rotatable selection work pattern, chooses the work pattern to match with drill bit, you can driving the drill bit work
Make.
However, often occur that the user drill bit selected and the phenomenon that operating mode does not match that are sent out in actual job
It is raw, thus it is easy to cause drill bit is stuck in the collet of electric device, when serious, electric device is also damaged together.Example
Such as, a kind of electric hammer electric tool of multi-function operation pattern, has flat drill pattern, impact drill pattern, electric hammer pattern and electric pick
Pattern, the flat drill drill bit and drill hammer or electric hammer drill used due to it cannot be compatible, when user will have the function of flat drill
Drill bit be installed on the electric hammer electric device collet on, selected gear (or operating mode) must be flat drill operation mould
Formula, it is impossible to its gear is rotated on the gear of impact or electric hammer, otherwise, the connection of the flat drill drill bit and electric device collet
Part, it is easy to deformation is hit under the percussion of the electric hammer, causes the flat drill drill bit to be stuck on electric device collet
Consequence, electric device is damaged therewith when serious.
Utility model content
The utility model embodiment mainly solving the technical problems that provide it is a kind of can automatic identification drill bit multi-functional electricity
Dynamic device and multi-functional electric tools, are capable of the operating mode of automatic identification drill bit and switch the work pattern of electric device, grasp
Make simply, securely and reliably, to avoid that unsafe incidents occur because of misoperation.
In order to solve the above technical problems, the technical solution that the utility model uses is：There is provided one kind can automatic identification
The Multifunctional electric device of drill bit, including apparatus main body and the control system in apparatus main body, the front end of apparatus main body are set
There is clamping device, clamping device is used to be detachably connected with drill bit,
Wherein, control system includes master controller and the radio frequency identification card reader, the electronics that are connected respectively with master controller
Clutch and motor, radio frequency identification card reader are used to obtaining the data message in the RF tag of drill bit, and by data message
It is transmitted to master controller；Master controller is used to control electric clutch according to data message, to switch the operation mould of electric device
Formula；Motor is used to export power by a transmission shaft, to drive drilling work.
Alternatively, master controller is used to control motor running according to data message, to drive drilling work.
Alternatively, electric clutch includes at least a clutch main body and clutch drive apparatus, clutch drive apparatus
At least a clutch main body and transmission shaft clutch are driven for receiving the control instruction of master controller, and according to control instruction, with
Switch the work pattern of electric device.
Alternatively, clutch drive apparatus include drive circuit and with electricity that at least a clutch main body connects one to one
Magnet, drive circuit is used to receive control instruction, and the movement of electromagnet is controlled according to control instruction, is connected with driving and electromagnet
The clutch main body and transmission shaft clutch connect.
Alternatively, electromagnet includes the two-phase coil windings being arranged oppositely, and a phase coil winding is connected wherein, Ling Yixiang
When coil windings disconnect, electromagnet is used to drive clutch main body to move along the corresponding direction of coil windings connected.
Alternatively, control system further includes the startup speed-regulating switch being connected respectively with master controller and traffic direction control is opened
Close；Start the rotating speed that speed-regulating switch is used for the startup and adjusting motor for controlling motor, traffic direction controlling switch is used to set
Determine the traffic direction of motor.
Alternatively, control system further includes the condition prompting device being connected with master controller, condition prompting device be used for into
Row working status is prompted and/or alarm.
Alternatively, control system further includes the power supply being connected with master controller, and for powering to electric device, power supply includes
Rechargeable battery and power interface.
The utility model embodiment also provide it is a kind of can automatic identification drill bit multi-functional electric tools, including：As above institute
The electric device stated, and
Drill bit, drill bit are equipped with the RF tag of anti-metal, and RF tag is used to send data message to electric device, with
Electric device is set to switch the work pattern of electric device according to data message.
Alternatively, drill bit includes bit head and the body of rod for being connected with electric device, and RF tag is permanently secured to bar
One end that body is connected with electric device.
The beneficial effect of the utility model embodiment is：The situation of the prior art is different from, the utility model embodiment
The control system of electric device includes master controller and the radio frequency identification card reader being connected respectively with master controller, electronics clutch
Device and motor, data message that can be in the RF tag of automatic identification drill bit control electronics according to the data message of acquisition
Clutch, it is easy to operate, safe and reliable to switch the work pattern of electric device, avoid occurring because of misoperation dangerous
Event.
Brief description of the drawings
One or more embodiments are illustrative by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not formed to embodiment, the element for having same reference numbers label in attached drawing are expressed as similar element, remove
Non- have a special statement, and composition does not limit the figure in attached drawing.
Fig. 1 be the utility model embodiment it is a kind of can automatic identification drill bit Multifunctional electric device structural representation
Figure；
Fig. 2 is the high-level schematic functional block diagram of the control system of the electric device shown in Fig. 1；
Fig. 3 is the structure diagram that the clutch main body of the electric device shown in Fig. 1 and electromagnet are connected；
Fig. 4 be the utility model embodiment it is a kind of can automatic identification drill bit multi-functional electric tools structural representation
Figure.
Embodiment
For the ease of understanding the utility model, below in conjunction with the accompanying drawings and specific embodiment, the utility model is carried out more detailed
Thin explanation.It should be noted that when element is expressed " being fixed on " another element, it can be directly in another element
Above or therebetween there may be one or more elements placed in the middle.When an element is expressed " connection " another element, it can
To be directly to another element or there may be one or more elements placed in the middle therebetween.This specification is used
Term " vertical ", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, the skill of technical and scientific term all used in this specification with belonging to the utility model
The normally understood implication of technical staff in art field is identical.In the art used in the description of the utility model in this specification
Language is intended merely to the purpose of description specific embodiment, is not intended to limitation the utility model.Term used in this specification
"and/or" includes the arbitrary and all combination of one or more relevant Listed Items.
Please refer to Fig.1 and Fig. 2, Fig. 1 be the utility model embodiment it is a kind of can automatic identification drill bit multifunctional motor-driven
The structure diagram of device, Fig. 2 are the high-level schematic functional block diagram of the control system of the electric device, which includes
Apparatus main body 110 and the control system 120 in apparatus main body 110, the front end of apparatus main body 110 are equipped with clamping device
111, clamping device 111 is used to be detachably connected with drill bit, wherein, drill bit is equipped with the RF tag of anti-metal, the radio frequency mark
Label have been internally integrated transmitting and reading circuit chip, power amplifier and antenna, and have the function of to read and store data etc..
Control system 120 includes master controller 121 and the radio frequency identification card reader being connected respectively with master controller 121
122nd, electric clutch 123 and motor 124, radio frequency identification card reader 122 are used to obtain the data in the RF tag of drill bit
Information, and by data information transfer to master controller 121；Master controller 121 is used to control electric clutch according to data message
123, to switch the work pattern of electric device 100；Motor 124 is used to export power by a transmission shaft 112, is bored with driving
Head operation.
Specifically, radio frequency identification card reader 122 by radiofrequency signal that the antenna carried is produced with the side of electromagnetic wave
Formula is sent directionally in the spatial dimension of clamping device 111, forms effective electromagnetic field；RF tag extracts number from electromagnetic field
After energy needed for transmission, by the data information transfer being stored in RF tag to radio frequency identification card reader 122；Radio frequency identification
Card reader 122 obtains the data message in RF tag.
In the present embodiment, data message includes the operating mode of drill bit, such as flat drill pattern, conflicting model, electric hammer pattern
Or electric pick pattern, master controller 121 controls electric clutch 123 according to the operating mode of drill bit, to switch electric device 100
Work pattern.
Alternatively, electric clutch 123 includes an at least clutch main body and clutch drive apparatus 1232, as Fig. 1 shows
Clutch main body 1231A, 1231B and 1231C of electric clutch 123 are gone out, clutch drive apparatus 1232 is used to receive master
The control instruction of controller 121, and an at least clutch main body and 112 clutch of transmission shaft are driven according to control instruction, with switching
The work pattern of electric device 100.
Clutch drive apparatus 1232 is the clutch drive apparatus being controlled using electronic signal, can be specifically to appoint
What is suitable, can perform the executing agency of respective action according to electric signal, such as electromagnet, dc motor, stepping are electronic
Machine etc..
By taking the electric hammer electric tool with three kinds of operating modes as an example, work of the master controller 121 according to drill bit is described in detail
Operation mode controls electric clutch 123, to switch the process of the work pattern of electric device 100：
The electric hammer electric tool includes flat drill pattern, wherein three kinds of operating modes of electric hammer pattern and electric pick pattern, clutch
Main body 1231A corresponding is electric pick pattern, and clutch main body 1231B corresponding is electric hammer pattern, and clutch main body 1231C is corresponded to
For flat drill pattern.
In an initial condition, clutch main body 1231C is engaged with transmission shaft 125, clutch main body 1231A and clutch
Main body 1231B is separated (that is, the operating mode of acquiescence electric device 100 is flat drill pattern) with transmission shaft 112.
When electric hammer drill is connected with clamping device 111, radio frequency identification card reader 122 is obtained in the RF tag of drill bit
Data message (operating mode for including the drill bit), and by data information transfer to master controller 121；Electric device 100 starts
Afterwards, master controller 121 exports corresponding control instruction according to the operating mode of drill bit, and clutch drive apparatus 1232 receives above-mentioned
Control instruction, and drive clutch main body 1231B to be engaged with transmission shaft 112 according to above-mentioned control instruction, to switch electric device
100 work pattern is electric hammer pattern.
Alternatively, clutch drive apparatus 1232 includes drive circuit and connects one to one with an at least clutch main body
Electromagnet, drive circuit is used to receive the control instruction of master controller 121, and controls electromagnet movement according to control instruction,
To drive the clutch main body being connected with electromagnet and 112 clutch of transmission shaft.
Electromagnet includes the two-phase coil windings that are arranged oppositely, and a phase coil winding is connected wherein, another phase coil around
When group disconnects, electromagnet is used to drive clutch main body to move along the corresponding direction of coil windings connected.
Fig. 3 shows the schematic diagram that clutch main body 1231A is connected with the electromagnet of clutch drive apparatus 1232, clutch
Device main body 1231B and clutch main body 1231C can be adopted to be realized in a like fashion.When the A phase windings of electromagnet power on,
During B phase winding deenergizations, which drives clutch main body 1231A to be moved to the A directions of electromagnet, is set to clutch master
Body 1231A engages direction with transmission shaft 112；So, when its B phase winding powers on, during A phase winding deenergizations, the electromagnetism
Sheet iron strip moves clutch main body 1231A and is moved to the B directions of electromagnet, is that clutch main body 1231A is separated with transmission shaft 112.
It will be appreciated by those skilled in the art that the control system 120 in the present embodiment includes electric clutch 123, wherein,
Electric clutch 123 includes three clutch main bodies and clutch drive apparatus 1232, in other embodiments, control system
It may include three electric clutch, wherein, each electric clutch includes a clutch main body and clutch drive apparatus respectively.
Alternatively, master controller 121 is additionally operable to control motor 124 to run according to data message, to drive the drill bit
Operation.Such as, data message further includes the type of drill bit or the initializing work parameter of drill bit, and master controller 121 is according to the class of drill bit
Type or initializing work state modulator motor 124 are run, to drive drilling work.
In one embodiment, data message includes the type of drill bit, the type of drill bit can be solid center bit, ceramic tile drill bit,
Glass drill head, metal spiral bit or the turn of the screw cutter head etc., wherein, solid center bit is suitable for processing on various timber, plastics
Operation, the turn of the screw cutter head are suitable for twisting different model screw, and different processing operations is different to the service requirement of motor, should
The master controller 121 of electric device 100 can set motor 124 automatically and drive the brill according to the type of the drill bit of acquisition
The rotating speed of head operation, acceleration, deceleration time, output torque, operating current, and control allow motor 124 to be operated in velocity mode
Or torque mode, or work in both patterns alternating it is medium.
In another embodiment, data message includes the initializing work parameter of drill bit, and initializing work parameter includes motor
124 rotating speed, acceleration, deceleration time, output torque, operating current, and operating mode etc., master controller 124 can be according to obtaining
The above-mentioned initializing work parameter taken, control motor 124 is run, to drive drilling work.
Alternatively, control system 120 further includes the startup speed-regulating switch 125 being connected respectively with master controller 121 and operation
Direction control switch 126；Start the rotating speed that speed-regulating switch 125 is used for the startup and adjusting motor 124 for controlling motor 124,
Traffic direction controlling switch 126 is used for the traffic direction for setting motor 124.Relevant operation is stored when no in RF tag
During parameter, or when these job parameters can't meet taking for 100 work at present of electric device well, user can root
Factually border is manipulated to meet self-defined requirement.
Further, master controller 121 is additionally operable to storage 124 currently running job parameter of motor, if obtain
Data message in RF tag does not include the initializing work parameter of drill bit, and master controller 121 is additionally operable to read by radio frequency identification
Currently running job parameter is write RF tag by card device 122, using the job parameter as drill bit.If currently running work
The job parameter or initializing work parameter of industry parameter and drill bit are inconsistent, and master controller 121 is additionally operable to by radio frequency identification Card Reader
Currently running job parameter is write RF tag by device, to replace the job parameter of drill bit or initializing work parameter.
Therefore, in addition to the drill bit use for the first time, the job parameter in the data message of RF tag is actually the brill
The job parameter of the last operation of head, initializing work parameter or use of these job parameters for producer according to the type set of drill bit
According to the job parameter of actual manipulation setting, master controller 121 controls electronic according to the job parameter of drill bit last time operation at family
Machine 124 is run, and to drive drilling work, avoiding needs re-adjustments job parameter when user reuses.
Alternatively, control system 120 further includes the condition prompting device 127 being connected with master controller 121, and e.g., state carries
Showing device 127 is voice prompt device, the one or more in vibration prompting device, buzzing suggestion device, LED suggestion devices,
For carrying out working status prompting.When drill bit is connected with clamping device 111, master controller 121 is penetrated according to the drill bit of acquisition
Data message in frequency marking label sets relevant parameter, e.g., the work pattern of electric device 100 and the work ginseng of motor 124
Number, and state of a control suggestion device 127 such as carries out at the prompting of work to be opened.When user is controlled by starting speed-regulating switch 125
After the startup of motor 124, master controller can obtain the data message in RF tag again by radio frequency identification card reader, with
Confirm the correctness of data, the operation then set according to the relevant parameter and traffic direction controlling switch 126 that set
Direction, control motor 124 is run, to drive drilling work to drive.During motor 124 is run, master controller 121
State of a control suggestion device 127 carries out the prompting in equipment work.
Alternatively, data message further includes the sequence number and factory data information of drill bit, wherein, the Serial No. drill bit
Identity recognition number, factory data information can not be changed, the two can by PC computers and radio-frequency identification reader/writer system into
Row inquiry and reading, available for false proof and product tracking and managing after sale.Master controller 121 controls motor according to data message
124 operations, to drive drilling work, further include：If the sequence number and/or factory data information of drill bit are illegal, main control
Device 121 forbids motor 124 to run；In other embodiments, master controller 121 be additionally operable to state of a control suggestion device 127 into
Row alarm, to safeguard producer itself legitimate interests.
The control system 120 further includes the power supply 128 being connected with master controller 121, for powering to electric device 100,
Power supply 128 includes rechargeable battery and power interface, can be powered by rechargeable battery to electric device 100, also can be by power supply
Interface is connected with external power supply, is powered using external power supply to electric device 100.
The control system of the electric device of the present embodiment includes master controller and the radio frequency being connected respectively with master controller
Identify card reader, electric clutch and motor, data message that can be in the RF tag of automatic identification drill bit, according to acquisition
Data message control electric clutch, it is easy to operate, safe and reliable to switch the work pattern of electric device, avoid because behaviour
Make improper and unsafe incidents occur.
The utility model embodiment also provide it is a kind of can automatic identification drill bit multi-functional electric tools, as shown in figure 4, bag
Electric device 100 as described above, and drill bit 200 are included, wherein, drill bit 200 includes bit head 210 and is used for and electric device
The body of rod 220 of 100 connections, drill bit 200 are equipped with the RF tag 230 of anti-metal, and RF tag 230 is used for electric device
100 send data message, so that electric device 100 switches the work pattern of electric device 100 according to data message.
The RF tag has been internally integrated transmitting and reading circuit chip, power amplifier and antenna, and with reading and
Store the functions such as data.Therefore, the drill bit 200 of RF tag has been mounted, can be by being connected to computer system (personal PC meters
Calculation machine system) in radio frequency identification card reader, read the data message in RF tag, and the relevant data message of write-in is extremely
In RF tag.
Alternatively, RF tag 230 is permanently secured to one end that the body of rod 220 is connected with electric device 100.In the present embodiment
In, the upper and lower part surface of RF tag 230 parallel to drill bit the longitudinal axis, that is, be fixed in the non axial orientation of drill bit 200, when
Drill bit 200 is installed in electric device 100, and the control system of electric device 100 can recognize that the RF tag 230 and obtain
Data message in RF tag 230.
Electric tool provided in this embodiment, including electric device and drill bit, the control system of electric device include master control
Device processed and the radio frequency identification card reader and electric clutch being connected respectively with master controller, are capable of the radio frequency of automatic identification drill bit
Data message in label, electric clutch is controlled according to the data message of acquisition, to switch the work pattern of electric device, behaviour
Make simply, securely and reliably, to avoid that unsafe incidents occur because of misoperation.
It should be noted that the preferable implementation of the utility model is given in the specification and its attached drawing of the utility model
Example, still, the utility model can be realized by many different forms, however it is not limited to the described implementation of this specification
Example, these embodiments are not as the extra limitation to the utility model content, there is provided the purpose of these embodiments is made to this reality
With the understanding more thorough and comprehensive of new disclosure.Also, above-mentioned each technical characteristic continues to be mutually combined, formed not upper
The various embodiments that face is enumerated, are accordingly to be regarded as the scope of the utility model specification record；Further, to ordinary skill
For personnel, it can according to the above description be improved or be converted, and all these modifications and variations should all belong to this practicality newly
The protection domain of type appended claims.
Claims (10)
1. it is a kind of can automatic identification drill bit Multifunctional electric device, including apparatus main body and the control in described device main body
System processed, the front end of described device main body are equipped with clamping device, and the clamping device is used to be detachably connected with drill bit, its feature
It is,
The control system include master controller and be connected respectively with the master controller radio frequency identification card reader, electronics from
Clutch and motor, the radio frequency identification card reader are used to obtaining the data message in the RF tag of the drill bit, and by institute
Data information transfer is stated to the master controller；The master controller is used to control the electronics clutch according to the data message
Device, to switch the work pattern of the electric device；The motor is used to export power by a transmission shaft, with described in driving
Drilling work.
2. electric device according to claim 1, it is characterised in that
The master controller is additionally operable to control the motor running according to the data message, to drive the drilling work.
3. electric device according to claim 1, it is characterised in that
The electric clutch is used for including an at least clutch main body and clutch drive apparatus, the clutch drive apparatus
Receive the control instruction of the master controller, and an at least clutch main body and the biography according to control instruction driving
Moving axis clutch, to switch the work pattern of the electric device.
4. electric device according to claim 3, it is characterised in that
The clutch drive apparatus include drive circuit and with the electromagnetism that at least a clutch main body connects one to one
Iron, the drive circuit is used to receive the control instruction, and the movement of the electromagnet is controlled according to the control instruction, with
Drive the clutch main body being connected with the electromagnet and the transmission shaft clutch.
5. electric device according to claim 4, it is characterised in that
The electromagnet includes the two-phase coil windings that are arranged oppositely, and a phase coil winding is connected wherein, another phase coil around
When group disconnects, the electromagnet is used to drive the clutch main body to move along the corresponding direction of coil windings connected.
6. according to claim 1-5 any one of them electric devices, it is characterised in that
The control system further includes the startup speed-regulating switch being connected respectively with the master controller and traffic direction controlling switch；
The rotating speed for starting speed-regulating switch and being used for the startup and adjusting motor for controlling the motor, the traffic direction control
System switch is used for the traffic direction for setting the motor.
7. according to claim 1-5 any one of them electric devices, it is characterised in that
The control system further includes the condition prompting device being connected with the master controller, the condition prompting device be used for into
Row working status is prompted and/or alarm.
8. according to claim 1-5 any one of them electric devices, it is characterised in that
The control system further includes the power supply being connected with the master controller, for powering to the electric device, the electricity
Source includes rechargeable battery and power interface.
9. it is a kind of can automatic identification drill bit multi-functional electric tools, it is characterised in that including：As claim 1~8 is any one
Electric device described in, and
Drill bit, the drill bit are equipped with the RF tag of anti-metal, and the RF tag is used to send number to the electric device
It is believed that breath, so that the electric device switches the work pattern of the electric device according to the data message.
10. electric tool according to claim 9, it is characterised in that
The drill bit includes bit head and the body of rod for being connected with the electric device, and the RF tag is permanently secured to institute
State one end that the body of rod is connected with the electric device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721065512.1U CN207309881U (en) | 2017-08-22 | 2017-08-22 | It is a kind of can automatic identification drill bit Multifunctional electric device and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721065512.1U CN207309881U (en) | 2017-08-22 | 2017-08-22 | It is a kind of can automatic identification drill bit Multifunctional electric device and electric tool |
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| CN207309881U true CN207309881U (en) | 2018-05-04 |
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ID=62432202
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| CN201721065512.1U Active CN207309881U (en) | 2017-08-22 | 2017-08-22 | It is a kind of can automatic identification drill bit Multifunctional electric device and electric tool |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821818A (en) * | 2019-10-31 | 2021-05-18 | 苏州宝时得电动工具有限公司 | Control device, electric tool body, and tool system |
| CN113194799A (en) * | 2018-12-06 | 2021-07-30 | 哥伦比亚保险公司 | Modular appliance apparatus configured for multiple attachments |
| CN115225150A (en) * | 2021-04-15 | 2022-10-21 | 南京泉峰科技有限公司 | Multi-head electric tool and working assembly identification method thereof |
-
2017
- 2017-08-22 CN CN201721065512.1U patent/CN207309881U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113194799A (en) * | 2018-12-06 | 2021-07-30 | 哥伦比亚保险公司 | Modular appliance apparatus configured for multiple attachments |
| CN112821818A (en) * | 2019-10-31 | 2021-05-18 | 苏州宝时得电动工具有限公司 | Control device, electric tool body, and tool system |
| CN115225150A (en) * | 2021-04-15 | 2022-10-21 | 南京泉峰科技有限公司 | Multi-head electric tool and working assembly identification method thereof |
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