CN110757417A

CN110757417A - Quick-change handheld tool

Info

Publication number: CN110757417A
Application number: CN201911192835.0A
Authority: CN
Inventors: 傅珂珂; 李进
Original assignee: Yongkang Guangyi Technology Co Ltd
Current assignee: Yongkang Guangyi Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-02-07

Abstract

The invention discloses a quick-change handheld tool, wherein an upper shell and a lower shell are buckled and connected into a shell part, a first accommodating cavity is arranged in the shell part, a driving motor is arranged in the first accommodating cavity, an output shaft of the driving motor is inserted into one end of an inner quick-connection assembly, and the other end of the inner quick-connection assembly is inserted into a functional shaft sleeve; the rotary blocking disc is elastically connected to one end of the shell part through two first springs, two clamping grooves are formed in the side wall, located on the outer side of the rotary blocking disc, of the shell part, two clamping pins are fixed on the inner side wall of the functional shell, and the clamping pins and the clamping grooves are arranged correspondingly; when the clamping pin is clamped in the clamping groove, the clamping pin is abutted against the rotary blocking disc; the functional head is a household electrical appliance. The household appliance aims to solve the problem that household appliances in the prior art can not be converted into various appliances for use when being used independently. The effect is as follows: the multifunctional energy-saving and emission-reducing multifunctional head has the advantages of realizing the function of one machine with multiple purposes, saving energy, reducing emission, reducing resource waste, automatically identifying the functional heads and providing power required by different functional heads.

Description

Quick-change handheld tool

Technical Field

The embodiment of the invention relates to the technical field of household tools, in particular to a quick-change handheld tool.

Background

At present, 220V strip line alternating current is mostly adopted by household appliances, and the appliances need to be plugged when in use, such as a fascia gun, a screwdriver, an electric wrench, a hedge trimmer, a double-vibration massage instrument, a rotary scrubbing machine, a light stirrer, a heavy stirrer, an electric fan, a noodle maker and the like; above-mentioned domestic life electrical apparatus all is the exclusive use, can only use unique certain function, can not convert other instruments or electrical apparatus into and use, in addition, some instruments or life electrical apparatus on the existing market have adopted lithium electricity wireless technology, but often power all is less, and the time of endurance is very short, often will charge, and the price is all higher in addition, also can only use unique certain function, and prior art's defect is:

1. each tool or electric appliance is unique, and a plurality of different household tools or living electric appliances need to be purchased when different functions are needed;

2. the strip line with 220V alternating current can be used only by finding a socket and plugging the socket every time, which is extremely inconvenient and has potential safety hazards of electric shock;

3. the wireless tool or the domestic electric appliance adopting the lithium battery is generally limited to the high cost of the lithium battery, can only be used for low power or have shorter endurance time, can only be used for one function, and cannot be used mutually.

Disclosure of Invention

Therefore, the embodiment of the invention provides a quick-change handheld tool to solve the problem that household appliances in the prior art are used independently and cannot be converted into different appliances.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to a first aspect of embodiments of the present invention, a quick-change hand tool comprises a universal body and a functional head; the universal machine body comprises an upper shell, a lower shell, a driving motor, an internal quick-connection assembly, a rotary catch disc and two first springs, wherein a functional shell is fixed at the power input end of the functional head, and a functional shaft sleeve is connected with the power input end of the functional head; the upper shell and the lower shell are buckled and connected to form a shell part, a first accommodating cavity is formed in the shell part, a driving motor is arranged in the first accommodating cavity, an output shaft of the driving motor is inserted into one end of the inner quick-connection component, and the other end of the inner quick-connection component is inserted into the functional shaft sleeve; the rotary blocking disc is elastically connected to one end of the shell part through two first springs, two clamping grooves are formed in the side wall, located on the outer side of the rotary blocking disc, of the shell part, two clamping pins are fixed on the inner side wall of the functional shell, and the clamping pins and the clamping grooves are arranged correspondingly; when the clamping pin is clamped in the clamping groove, the clamping pin is abutted against the rotary blocking disc; the functional head is a household electrical appliance.

Further, the periphery side of casing portion sets up a plurality of barb grooves, and it is protruding to be provided with a plurality of joints on the inside wall of function shell, and the quantity in a plurality of barb grooves is the same with the bellied quantity of a plurality of joints, and when the rotatory joint of joint round pin on the function shell was in the joint groove, the joint that the joint arch on the function shell corresponds was in the barb groove.

Furthermore, the internal quick-connection assembly comprises an internal quick-connection sleeve, an internal quick-connection shaft, an internal quick-connection base, a second spring, an internal quick-connection elastic column, an internal quick-connection gasket, an internal quick-connection lower cover, a plurality of steel balls, an internal quick-connection upper cover and a third spring; the inner quick connecting sleeve is fixed on the outer peripheral side of the inner quick connecting shaft, a motor shaft hole is formed in one end of the inner quick connecting shaft, an output shaft of a driving motor is inserted into the motor shaft hole, an annular accommodating cavity is formed between the outer side wall of the other end of the inner quick connecting shaft and the inner quick connecting sleeve, the inner quick connecting base is sleeved on the outer peripheral side of the inner quick connecting shaft, and the middle of the inner quick connecting base is abutted to the annular accommodating cavity in the inner quick connecting sleeve; the inner quick-connection elastic column is sleeved on the outer peripheral side of the inner quick-connection shaft, the inner side wall of the inner quick-connection elastic column is in sliding connection with the outer side wall of the inner quick-connection shaft, and the outer side wall of the inner quick-connection elastic column is in sliding connection with the inner side wall of the inner quick-connection base; the second spring is sleeved on the outer peripheral side of the joint of the inner quick-connection base and the inner quick-connection elastic column, one end of the second spring is abutted against the inner quick-connection base, and the other end of the second spring is abutted against the inner quick-connection elastic column; one end of the inner quick-connection gasket is sleeved and connected with one end, far away from the second spring, of the inner quick-connection elastic column, the outer side wall of the inner quick-connection gasket is connected to the inner side wall of the inner quick-connection lower cover in a sliding mode, and a plurality of round holes for steel balls to pass through are formed in the contact position of the inner quick-connection lower cover and the inner quick-connection gasket; one end of the inner quick-connection lower cover, which is far away from the steel ball, is inserted into the annular accommodating cavity of the inner quick-connection sleeve and is abutted against the inner quick-connection base; the periphery side of the quick-connection sleeve including sliding is established to the pot head of interior quick-connection upper cover, the periphery side of the quick-connection lower cover including sliding is established to the middle part cover of interior quick-connection upper cover, be provided with a plurality of steel balls in the other end of interior quick-connection upper cover and the interior cavity of connecing between the lower cover soon, the middle part of the quick-connection upper cover including the one end butt of third spring, on the terminal surface of the opening end of quick-connection sleeve including the other end butt of third spring, when the function axle sleeve is pegged graft and is held the chamber between quick-connection axle and the interior quick-connection lower cover, a plurality of steel balls lock in the annular groove of function axle sleeve periphery side.

Furthermore, the device also comprises an identification module, an identification lead, an insert copper sheet, a contact copper sheet, a locking nut, a main circuit board and a partition plate; the main circuit board is arranged on the back side of the driving motor, the partition board is arranged between the main circuit board and the driving motor, and the main circuit board is provided with a control circuit; the locking nut is in threaded connection with a part of the clamping pin, which is positioned outside the functional shell, the two clamping pins are electrically connected through an identification wire, identification modules for identifying different functional heads are arranged on the identification wire, the identification modules of the different functional heads are different, and the identification modules are identification resistors or identification chips; an insert copper sheet is embedded in the position, abutted against the clamping pin, of the rotary blocking disc, one end of the first spring is abutted against the insert copper sheet, a contact copper sheet is fixed to the other end of the first spring, the two contact copper sheets are respectively and electrically connected with the main circuit board, the driving motor is electrically connected with the main circuit board, and the control circuit adjusts the rotating speed of the driving motor according to signals of the identification module.

Further, the decorative ring, the decorative ear and the decorative sleeve are also included; the outer peripheral sides of the two locking nuts are respectively and correspondingly sleeved with and fixedly provided with decorative lugs, the two decorative lugs are connected by a decorative ring, the outer peripheral side of the identification wire is sleeved by the decorative ring, and the decorative sleeve is arranged at the joint of the shell part and the functional shell.

Furthermore, the universal machine body also comprises a heat dissipation rear cover; the main circuit board is provided with a display screen, a reduction button, a main power switch and an increase button, wherein the main power switch is used for controlling the power on and off of the driving motor, the reduction button is used for reducing the rotating speed of the driving motor, and the increase button is used for increasing the rotating speed of the driving motor; the display screen is used for displaying the category and gear information of the household appliances with the functional heads; the display screen, the adjusting and increasing button, the main power switch and the adjusting and decreasing button are all embedded on the heat dissipation rear cover, and a plurality of heat dissipation holes are further formed in the heat dissipation rear cover.

Furthermore, the universal machine body also comprises a soft rubber sleeve, a bottom cover and a battery pack; the soft rubber sleeve is detachably arranged at the lower part of the lower shell, the battery pack passes through the soft rubber sleeve and then is detachably connected in the lower shell, and the battery pack is sealed in the soft rubber sleeve and the lower shell by the bottom cover; the battery pack is electrically connected with the main circuit board; the bottom cover is provided with a charging port which is electrically connected with the battery pack.

Furthermore, the universal machine body also comprises a quick-release button and a plug-in connecting piece; quick-release button sets up on the lateral wall of casing down including the plug connecting piece sets up the downside of connecing the subassembly soon and with casing fixed connection down, quick-release button's inboard butt on the plug connecting piece, quick-release button is used for pushing out the battery package fast after pressing down and takes off.

Furthermore, the universal machine body also comprises a switch upper plate, a switch lower plate and a branch switch; the upper switch plate and the lower switch plate are both arranged on the lower shell, the branch switch is arranged on the lower switch plate, the upper end of the lower switch plate is fixedly connected with one end of the upper switch plate, the other end of the upper switch plate is bent to the back side of the driving motor, the branch switch is electrically connected with the main circuit board, and the branch switch is used for operating the switch of the driving motor when the quick-change handheld tool is held.

Furthermore, the universal machine body further comprises a motor support, the motor support is sleeved on the outer peripheral side of the inner quick-connection assembly, one end of the motor support is fixed on the shell of the driving motor, and the other end of the motor support abuts against the inner bottom face of one end, provided with the rotary blocking disc, of the shell.

Further, the functional head is any one of a fascia gun, a screwdriver, an electric wrench, a hedge trimmer, a double vibration massager, a rotary scrubber, a light stirrer, a heavy stirrer and an electric fan.

The invention has the following advantages:

1. the shell part of the universal host is rotationally clamped with the functional shell of the functional head, and the inner quick-connection assembly of the universal host is inserted and locked with the functional shaft sleeve of the functional head, so that the quick connection of various functional heads on the same universal host is realized, the processing cost of household appliances is obviously reduced, and the price of various functional heads is obviously lower than that of different household appliances on the market;

2. the common universal host realizes the recombination of various functions, and the common lithium battery pack, the brushless motor, the controller, the switch, the host shell and the connection structure realize the function of one machine with multiple functions, energy conservation and emission reduction and resource waste reduction by connecting different functional heads and sharing the lithium battery pack, the brushless motor, the controller, the switch, the host shell and the connection structure;

3. the recognition module (recognition resistor or recognition chip) arranged on the function head is used for realizing that different function heads are used each time, the function heads are automatically recognized, and power required by different function heads is provided;

4. the lithium battery is protected by multiple safety chips, is safe and reliable, has no electric shock potential safety hazard compared with 220V, and can be recycled for multiple times;

5. the multifunctional small-sized living electric appliance integrating multiple functions is mainly used in the scenes of household, vehicle-mounted, outdoor and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is an exploded view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 2 is a cross-sectional structural view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 3 is a block diagram of an internal quick-connect assembly of a quick-change hand tool according to some embodiments of the invention.

Fig. 4 is a perspective view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 5 is a front view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 6 is a right side view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 7 is a bottom view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 8 is a rear view of a quick-change hand tool according to some embodiments of the present invention.

Fig. 9 is a block diagram of a fascia gun of a quick-change hand tool according to some embodiments of the invention.

Fig. 10 is a structural view of an electric mounting screw of a quick-change hand tool according to some embodiments of the present invention.

Fig. 11 is a block diagram of a hedge trimmer mounting a quick-change hand tool according to some embodiments of the present invention.

Fig. 12 is a block diagram of a quick-change hand tool mounted dual vibratory massage machine according to some embodiments of the present invention.

FIG. 13 is a block diagram of a mounted rotary scrubber for a quick-change hand tool according to some embodiments of the invention.

Fig. 14 is a block diagram of a light-weight mixer for a quick-change hand tool according to some embodiments of the invention.

Fig. 15 is a block diagram of a heavy-duty agitator mounted quick-change hand tool according to some embodiments of the present invention.

Fig. 16 is a block diagram of a table fan mounted quick-change hand tool according to some embodiments of the present invention.

Fig. 17 is a structural diagram of a vertical electric fan mounted on a quick-change handheld tool according to some embodiments of the present invention.

In the figure: 1. a universal machine body, 2, an upper shell, 3, a lower shell, 4, an internal quick-connection assembly, 5, a rotary baffle disc, 6, a first spring, 7, an insert copper sheet, 8, a contact copper sheet, 9, a functional shell, 10, a clamping pin, 11, a functional shaft sleeve, 12, a locking nut, 13, an identification module, 14, an identification lead, 15, a decorative ring, 16, a decorative lug, 17, a decorative sleeve, 18, a motor bracket, 19, a driving motor, 20, a main circuit board, 21, a heat dissipation rear cover, 22, a plug connecting piece, 23, a switch upper plate, 24, a switch lower plate, 25, a quick-release button, 26, a soft rubber sleeve, 27, a bottom cover, 28, a battery pack, 29, a clamping groove, 30, a motor shaft hole, 31, an internal quick-connection sleeve, 32, an internal quick-connection shaft, 33, an internal quick-connection base, 34, a second spring, 35, an internal quick-connection elastic column, 36, an internal quick-connection gasket, 37, an internal quick-connection lower cover, 38, 39. the device comprises an inner quick-connection upper cover, a 40, a third spring, a 41, a display screen, a 42, a reduction button, a 43, a main power switch, a 44, an increase button, a 45, a branch switch, a 46, a charging port, a 47, a fascia gun, a 48, a screw electric wrench, a 49, a hedge trimmer, a 50, a double-vibration massager, a 51, a rotary scrubbing machine, a 52, a light stirrer, a 53, a heavy stirrer, a 54, an electric fan, a 55, a partition board, a 56 and a barb groove.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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

As shown in fig. 1 to 8, the quick-change hand tool in the present embodiment includes a general-purpose machine body 1 and a functional head; the universal machine body 1 comprises an upper shell 2, a lower shell 3, a driving motor 19, an internal quick-connection assembly 4, a rotary catch disc 5 and two first springs 6, wherein a functional shell 9 is fixed at the power input end of a functional head, and a functional shaft sleeve 11 is connected with the power input end of the functional head; the upper shell 2 and the lower shell 3 are buckled and connected to form a shell part, a first accommodating cavity is formed in the shell part, the driving motor 19 is arranged in the first accommodating cavity, an output shaft of the driving motor 19 is inserted into one end of the inner quick-connection assembly 4, and the other end of the inner quick-connection assembly 4 is inserted into the functional shaft sleeve 11; the rotary blocking disc 5 is elastically connected to one end of the shell part through two first springs 6, two clamping grooves 29 are formed in the side wall, located on the outer side of the rotary blocking disc 5, of the shell part, two clamping pins 10 are fixed to the inner side wall of the functional shell 9, and the clamping pins 10 are arranged corresponding to the clamping grooves 29; when the clamping pin 10 is clamped in the clamping groove 29, the clamping pin 10 abuts against the rotary catch disc 5; the functional head is a household appliance; the first spring 6 of this embodiment is a compression spring, and the upper housing 2 and the lower housing 3 are connected by a snap connection or a screw connection.

In this embodiment, for example, the upper casing 2 and the lower casing 3 are respectively provided with a catching groove 29, the catching groove 29 is L-shaped, the open ends of the catching groove 29 are respectively provided at the end of the upper casing 2 and the lower casing 3 contacting the functional head, the rotation blocking disk 5 is provided with two grooves recessed toward the side of the driving motor 19, the groove is matched with the outer cylindrical surface of the clamping pin 10, one side edge of the groove is smoothly connected with the surface of the rotary blocking disc 5, when in use, the two clamping pins 10 are respectively aligned with the open ends of the clamping grooves 29, then the functional shell 9 is rotated, the functional shell 9 drives the clamping pin 10 to rotate to the bottom of the clamping groove 29, at this time, the clamping pin 10 gradually pushes the rotary blocking disc 5 to the inner side of the shell part, and the rotary blocking disc 5 descends under the action of the spring force of the first spring 6 to tightly press the clamping pin 10 in the clamping groove 29 so as to prevent the clamping pin from sliding out; a drive control board of the drive motor 19 is provided at the front end position of the brushless motor, and all signal processing is performed on the main circuit board 20.

The device comprises a general host and a plurality of functional heads, adopts a 100WH high-energy lithium ion battery pack as a power source, and uses a high-efficiency outer rotor brushless motor.

The technical effect that this embodiment reaches does: the shell part of the universal host machine is rotationally clamped with the functional shell 9 of the functional head, and the inner quick-connection assembly 4 of the universal host machine is inserted and locked with the functional shaft sleeve 11 of the functional head, so that the quick connection of various functional heads on the same universal host machine is realized, the processing cost of household appliances is obviously reduced, and the price of various functional heads is obviously lower than that of different household appliances on the market; the common universal host realizes the recombination of various functions, and the common lithium battery pack 28, the brushless motor, the controller, the switch, the host shell and the connection structure realize the function of one machine with multiple functions, energy conservation and emission reduction and resource waste reduction by connecting different functional heads and sharing the lithium battery pack 28, the brushless motor, the controller, the switch, the host shell and the connection structure; the multifunctional small-sized living electric appliance integrating multiple functions is mainly used in the scenes of household, vehicle-mounted, outdoor and the like.

Example 2

As shown in fig. 1 to 8, the quick-change hand tool in this embodiment includes all the technical features of embodiment 1, in addition to that, the internal quick-connection assembly 4 includes an internal quick-connection sleeve 31, an internal quick-connection shaft 32, an internal quick-connection base 33, a second spring 34, an internal quick-connection elastic column 35, an internal quick-connection washer 36, an internal quick-connection lower cover 37, a plurality of steel balls 38, an internal quick-connection upper cover 39 and a third spring 40; the inner quick-connection sleeve 31 is fixed on the outer peripheral side of the inner quick-connection shaft 32, a motor shaft hole 30 is formed in one end of the inner quick-connection shaft 32, an output shaft of the driving motor 19 is inserted into the motor shaft hole 30, an annular accommodating cavity is formed between the outer side wall of the other end of the inner quick-connection shaft 32 and the inner quick-connection sleeve 31, the inner quick-connection base 33 is sleeved on the outer peripheral side of the inner quick-connection shaft 32, and the middle of the inner quick-connection base 33 is abutted to the annular accommodating cavity in the inner quick-connection sleeve 31; the inner quick-connection elastic column 35 is sleeved on the outer peripheral side of the inner quick-connection shaft 32, the inner side wall of the inner quick-connection elastic column 35 is in sliding connection with the outer side wall of the inner quick-connection shaft 32, and the outer side wall of the inner quick-connection elastic column 35 is in sliding connection with the inner side wall of the inner quick-connection base 33; the second spring 34 is sleeved on the outer peripheral side of the joint of the inner quick connection base 33 and the inner quick connection elastic column 35, one end of the second spring 34 is abutted against the inner quick connection base 33, and the other end of the second spring 34 is abutted against the inner quick connection elastic column 35; one end of the inner quick-connection gasket 36 is sleeved and connected with one end, far away from the second spring 34, of the inner quick-connection elastic column 35, the outer side wall of the inner quick-connection gasket 36 is connected to the inner side wall of the inner quick-connection lower cover 37 in a sliding mode, and a plurality of round holes for steel balls 38 to pass through are formed in the contact position of the inner quick-connection lower cover 37 and the inner quick-connection gasket 36; one end of the inner quick-connection lower cover 37, which is far away from the steel balls 38, is inserted into the annular accommodating cavity of the inner quick-connection sleeve 31 and is abutted against the inner quick-connection base 33; one end of the inner quick-connection upper cover 39 is sleeved on the outer peripheral side of the inner quick-connection sleeve 31 in a sliding manner, the middle part of the inner quick-connection upper cover 39 is sleeved on the outer peripheral side of the inner quick-connection lower cover 37 in a sliding manner, a plurality of steel balls 38 are arranged in a cavity between the other end of the inner quick-connection upper cover 39 and the inner quick-connection lower cover 37, one end of a third spring 40 is abutted to the middle part of the inner quick-connection upper cover 39, the other end of the third spring 40 is abutted to the end face of the open end of the inner quick-connection sleeve 31, and when the functional shaft sleeve 11 is inserted into an accommodating cavity between the inner quick-connection shaft 32 and the inner quick-connection lower cover 37, the plurality of steel balls 38 are; in this embodiment, the second spring 34 and the third spring 40 are compression springs, a limiting plane for limiting the relative rotation of the output shaft of the driving motor 19 and the motor shaft hole 30 is disposed in the motor shaft hole, and a limiting surface for preventing the relative rotation of the output shaft and the motor shaft is disposed at a connection position between the functional shaft sleeves 11 at the other end of the inner quick coupling shaft 32.

In the present embodiment, when the functional head is not mounted in the internal quick-connect assembly 4, at this time, the internal quick-connect washer 36 encloses a plurality of steel balls 38 outside the outer side wall of the internal quick-connect washer 36, the plurality of steel balls 38 being located in the annular cavity between the internal quick-connect upper cover 39 and the internal quick-connect lower cover 37; when the functional head needs to be plugged into the internal quick-connection assembly 4, the end of the functional shaft sleeve 11 is inserted into the internal quick-connection gasket 36, the internal quick-connection gasket 36 and the internal quick-connection elastic column 35 are pushed to move along the axis of the internal quick-connection shaft 32, at the moment, the second spring 34 contracts, the limiting function of the internal quick-connection gasket 36 is lost by the steel balls 38, the third spring 40 extends to push the internal quick-connection upper cover 39 to move in the opposite direction, at the moment, the steel balls 38 are pushed into the round holes in the internal quick-connection lower cover 37 under the action of the inclined plane on the inner side of the internal quick-connection upper cover 39, at the moment, the steel balls 38 abut against the annular groove formed in the outer peripheral side of the functional shaft sleeve 11, and therefore the axis correction and locking of the functional shaft sleeve.

In addition, a plurality of barb grooves 56 are arranged on the outer periphery of the shell part, a plurality of clamping protrusions are arranged on the inner side wall of the functional shell 9, the number of the barb grooves 56 is the same as that of the clamping protrusions, and when the clamping pin 10 on the functional shell 9 is rotationally clamped in the clamping groove 29, the clamping protrusions on the functional shell 9 are correspondingly clamped in the barb grooves 56; when the functional shell 9 needs to be detached, the functional shell 9 on the functional head is pushed towards the direction of the driving motor 19, at this time, the clamping protrusion exits from the barb groove 56, meanwhile, the rotary catch disc 5 pushes the inner quick-connection upper cover 39 to move towards the direction of the driving motor 19, at this time, the steel ball 38 is pushed out under the action of the elastic force of the second spring 34, and at this time, the functional shaft sleeve 11 is separated from the inner quick-connection assembly 4.

The beneficial effects in this embodiment are: the multifunctional head can be quickly inserted into a host, the coaxial center calibration of the functional head and the driving motor 19 is realized under the action of the steel balls 38, and the internal structure and the external structure are quickly connected and reliably matched; the steel ball 38 is sealed outside the inner quick-connection gasket 36 when not in use by the elastic force of the second spring 34, and the steel ball 38 is extruded into the annular groove on the periphery of the functional shaft sleeve 11 by the elastic force of the third spring 40.

Example 3

As shown in fig. 1 to 8, the quick-change hand tool in this embodiment includes all the technical features of embodiment 2, and in addition, includes an identification module 13, an identification lead 14, an insert copper sheet 7, a contact copper sheet 8, a lock nut 12, a main circuit board 20 and a partition plate 55; the main circuit board 20 is arranged on the back side of the driving motor 19, the partition plate 55 is arranged between the main circuit board 20 and the driving motor 19, the partition plate 55 is a net-shaped baffle plate, joints of all wires and the main circuit board 20 are protected from touching the driving motor 19, and the main circuit board 20 is provided with a control circuit; the locking nut 12 is in threaded connection with the part, located outside the functional shell 9, of the clamping pins 10, the two clamping pins 10 are electrically connected through the identification lead 14, the identification lead 14 is provided with identification modules 13 used for identifying different functional heads, the identification modules 13 of the different functional heads are different, the identification modules 13 are identification resistors or identification chips, errors can exist due to the size of contact resistors when the identification resistors are used, signal identification between the identification chips and a main chip on the main circuit board 20 is used, the influence of the contact resistors is avoided, and the identification effect is more reliable; an insert copper sheet 7 is embedded in the position where the rotary blocking disc 5 abuts against the clamping pin 10, one end of the first spring 6 abuts against the insert copper sheet 7, the other end of the first spring 6 is fixed with a contact copper sheet 8, the two contact copper sheets 8 are respectively and electrically connected with the main circuit board 20 through conducting wires, the driving motor 19 is electrically connected with the main circuit board 20, and the control circuit adjusts the rotating speed of the driving motor 19 according to the signal of the identification module 13; also comprises a decorative ring 15, a decorative ear 16 and a decorative sleeve 17; decorative lugs 16 are respectively and correspondingly sleeved on the outer peripheral sides of the two locking nuts 12, the two decorative lugs 16 are connected by a decorative ring 15, the decorative ring 15 is sleeved on the outer peripheral side of the identification wire 14, and a decorative sleeve 17 is arranged at the joint of the shell part and the functional shell 9; after the different functional heads are inserted, the high-intelligent chip automatically identifies the functional heads and controls the outer rotor brushless motor to provide different rotating speed outputs, so that different power outputs with different functions are realized; the lock nut 12 in this embodiment is formed by an internal thread formed on the inner side of the tubular structure, and an external thread adapted to the lock nut 12 is formed on one end of the latch pin 10 exposed outside the functional housing 9.

The control principle of the embodiment is as follows: the type of the identification module 13 is set according to the rotating speed required by household appliances with different functional heads, when the functional heads are plugged in the universal host, the identification module 13 is connected into a circuit loop of a control circuit of the universal host, and different voltages of the driving motor 19 are controlled and distributed through the main circuit board 20 to generate currents with different sizes on the premise that the voltage in the battery pack 28 of the universal host is not changed, so that the matching of the rotating speed of the driving motor 19 and the rotating speed of the functional heads is realized; the control circuit for the single chip microcomputer and the driving motor 19 is a mature circuit in the prior art.

The beneficial effects in this embodiment are: after the various functional heads are inserted, the advanced chip automatically identifies and provides different signals of the motor to realize different rotating speed output; the recognition module 13 arranged on the functional head realizes that different functional heads are used each time, the functional heads are automatically recognized, and power required by different functional heads is provided; the locking nut 12 is arranged, so that the clamping pin 10 is prevented from falling off; the conductive performance of the whole device is improved by arranging the insert copper sheet 7 and the contact copper sheet 8; by providing the decoration ring 15 and the decoration sleeve 17, wear of the identification module 13 (e.g., identification resistor or identification chip) and the identification wire 14 is avoided, and at the same time, an aesthetic effect is provided, and the service life of the identification module 13 (e.g., identification resistor or identification chip) is prolonged.

Example 4

As shown in fig. 1 to 8, the quick-change hand tool in this embodiment includes all the technical features of embodiment 3, and in addition, the universal machine body 1 further includes a heat dissipation rear cover 21; the main circuit board 20 is provided with a display screen 41, a reduction button 42, a main power switch 43 and an increase button 44, the main power switch 43 is used for controlling the power on and off of the driving motor 19, the reduction button 42 is used for reducing the rotating speed of the driving motor 19, the increase button 44 is used for increasing the rotating speed of the driving motor 19, some functional heads have multi-gear operation requirements, and the requirements are adjusted by the reduction button 42 and the increase button 44; the display screen 41 is used for displaying the category and current gear information of the household appliances with the functional heads; the display screen 41, the increase button 44, the main power switch 43 and the decrease button 42 are all embedded on the heat dissipation rear cover 21, and a plurality of heat dissipation holes are also formed in the heat dissipation rear cover 21; the universal machine body 1 further comprises a soft rubber sleeve 26, a bottom cover 27 and a battery pack 28; the soft rubber sleeve 26 is detachably arranged at the lower part of the lower shell 3, the battery pack 28 penetrates through the soft rubber sleeve 26 and then is detachably connected in the lower shell 3, and the battery pack 28 is sealed in the soft rubber sleeve 26 and the lower shell 3 by the bottom cover 27; the battery pack 28 is electrically connected with the plug connector 22; a charging port 46 is arranged on the bottom cover 27, and the charging port 46 is electrically connected with the battery pack 28; the universal machine body 1 further comprises a quick release button 25 and a plug connecting piece 22; the plug connecting piece 22 is arranged on the lower side of the internal quick-connection assembly 4 and is fixedly connected with the lower shell 3, the quick-release button 25 is arranged on the outer side wall of the lower shell 3, the inner side of the quick-release button 25 abuts against the plug connecting piece 22, and the quick-release button 25 is used for quickly pushing out and taking down the battery pack 28 after being pressed down, wherein the plug connecting piece 22 plays a role in plug-in connection with the power supply battery pack 28, and the upper end of the plug connecting piece 22 is fixed in the lower shell 3 through four nuts; the functional heads share main accessories such as a lithium battery pack 28, an outer rotor brushless motor, a controller, a switch, a host shell and the like.

The working principle of the embodiment is as follows: the singlechip correspondingly matches the name of the functional head according to different identification modules 13, for example, according to different resistance values of identification resistors or different types of identification chips, and displays the name of the inserted household electrical appliance and gear information on the display screen 41, and a control circuit for displaying characters on the display screen 41 by the singlechip is a mature circuit in the prior art; in addition, when the rotation speed of the driving motor 19 needs to be manually adjusted, the rotation speed of the driving motor 19 can be adjusted by pressing the adjusting button 44 or the adjusting button 42, and the circuit for adjusting the rotation speed of the driving motor 19 is also a mature circuit in the prior art.

The battery pack 28 structure in the present embodiment includes: the battery barrel is a pipe body with two closed ends, the outer edge of one closed end face of the battery barrel is provided with at least two electrode interfaces at intervals along the circumferential direction of the battery barrel, an electrode inserting piece is inserted into each electrode interface, and the other closed end face of the battery barrel is provided with a wiring opening; the battery pack comprises a plurality of lithium batteries and battery protection boards electrically connected with the lithium batteries, the battery pack is arranged in the battery barrel, and the electrode insert is positioned at the inner side end of the battery barrel and is electrically connected with the battery protection boards; the plug-in part is disc-shaped and is arranged outside one side of the battery barrel, which is provided with the electrode interface, the plug-in part is convexly provided with a plurality of connecting convex blocks towards the outer edge of one side of the battery barrel at intervals along the circumferential direction of the plug-in part, the connecting convex blocks and the plug-in part are matched to form a plug-in cavity, electrode slots are arranged on the connecting convex blocks, electrode elastic pieces are inserted into the electrode slots, and one side of the plug-in part, which is far away from; the connecting piece is a pipe body, the plug-in piece is detachably arranged in the middle of the inner side of the connecting piece, one opening end of the connecting piece is connected to the electric equipment, and the connecting piece is inserted into the battery barrel and then used as a handle of the electric equipment; one end of the battery barrel, which is provided with an electrode interface, is inserted into the inner side of the connecting piece from the other opening end of the connecting piece and is inserted into the plugging cavity of the plugging piece, the inner surface of the connecting lug is attached to the outer wall of the battery barrel, and the electrode elastic sheet inserted into the electrode slot is contacted with the electrode inserting sheet at the outer side end of the battery barrel to form conductive connection; the power supply connector comprises a plurality of power supply lines and power supply terminals connected to one ends of the plurality of power supply lines, which are far away from the power supply terminals, are electrically connected with the electrode inserting pieces through electrode elastic pieces, and the power supply connector is electrically connected with the power supply ends of the electric equipment through the power supply terminals; the base is detachably arranged at one end of the battery barrel, which is provided with the wiring opening; connecting openings are respectively formed in the outer wall of the battery barrel, which is positioned at the outer sides of two ends of one electrode interface, along the axial direction of the battery barrel, a connecting elastic sheet is internally connected in each connecting opening along the length direction of the connecting opening, one end of each connecting elastic sheet is internally connected with the connecting opening, the other end of each connecting elastic sheet is positioned at the inner side of the connecting opening, a connecting bulge is convexly arranged on the outer surface of the end, and a supporting plate on the plugging piece is convexly arranged on the surface of the plugging piece close to; a connecting port corresponding to the support plate is arranged on the outer wall of the connecting piece close to the support plate; the pressing piece is positioned on the inner side of the connecting piece provided with the connecting port and is arranged parallel to the supporting plate, the pressing piece is elastically connected with the supporting plate through an elastic piece towards one surface of the supporting plate, the pressing piece is opposite to the connecting port towards the surface away from the supporting plate, two ends of the lower end surface of the pressing piece are respectively provided with a push plate in a protruding mode, the lower portion of one surface of the push plate towards the supporting plate abuts against a connecting bulge of the connecting elastic piece, and the two push plates are positioned on; the inner wall of the connecting piece is convexly provided with two convex strips along the axial direction of the connecting piece, the two convex strips are arranged at intervals along the circumferential direction of the connecting piece, and the two connecting bulges are inserted between the two convex strips in a sliding manner; two side walls of one end of the pressing piece, which is far away from the push plate, are respectively convexly provided with an inserting part, the inner wall of the connecting piece is convexly provided with a clamping convex block matched with the inserting part, and the inserting part is inserted in the clamping convex block to form a clamping structure; the button is arranged on the connecting port of the connecting piece and is connected with one surface of the pressing piece, which is far away from the supporting plate; the inner wall of the connecting piece is provided with a plurality of connecting guide grooves along the radial direction of the connecting piece, the connecting guide grooves are distributed at intervals along the circumferential direction of the connecting piece, and the connecting lugs of the plugging piece are inserted into the connecting guide grooves in a sliding manner; the elastic element is a spring.

The beneficial effects in this embodiment are: the lithium battery is protected by multiple safety chips, is safe and reliable, has no electric shock potential safety hazard compared with 220V, and can be recycled for multiple times; through setting up soft gum cover 26, strengthened the comfort of gripping, in addition, still played the effect of protection battery package 28, played better preventing falling the effect.

Example 5

As shown in fig. 1 to 8, the quick-change hand tool in this embodiment includes all the technical features of embodiment 4, and in addition, the universal body 1 further includes a switch upper plate 23, a switch lower plate 24 and a sub-switch 45; the upper switch plate 23 and the lower switch plate 24 are both arranged on the lower shell 3, the sub-switch 45 is arranged on the lower switch plate 24, the upper end of the lower switch plate 24 is fixedly connected with one end of the upper switch plate 23, the other end of the upper switch plate 23 is bent to the back side of the driving motor 19, and the sub-switch 45 is electrically connected with the main circuit board 20; the branch switch 45 is used for operating the switch of the driving motor 19 when the quick-change handheld tool is held, namely the branch switch 45 is operated after the main power switch 43 is turned on, so that the starting condition of the driving motor 19 caused by mistaken touch of the branch switch 45 is avoided, in addition, an identification line connected with the identification module 13, a motor line of the driving motor 19 and a switch line of the branch switch 45 pass through the lower surface of the switch upper plate 23, so that the isolation from the driving motor 19 is realized, and the contact of the driving motor 19 with the lead or the signal line is avoided; the universal machine body 1 further comprises a motor support 18, the motor support 18 is sleeved on the outer peripheral side of the inner quick-connection assembly 4, one end of the motor support 18 is fixed on a shell of the driving motor 19, and the other end of the motor support 18 abuts against the inner bottom surface of one end, provided with the rotary blocking disc 5, of the shell.

The beneficial effects in this embodiment are: by arranging the branch switch 45, the safety of the universal host in the use process is improved, and the total control of the circuit is realized; through setting up motor support 18, avoided rocking of driving motor 19, simultaneously, for identification module 13 lead to plug connecting piece 22 and plug connecting piece 22 lead to the wire of main circuit board 20 provides the guard action, avoided the winding to the internal line that produces in the driving motor 19 rotation process.

Example 6

A quick-change hand tool according to this embodiment includes all the technical features of embodiment 5, and in addition, the functional head is any one of a fascia gun 47 shown in fig. 9, a screw electric wrench 48 shown in fig. 10, a hedge trimmer 49 shown in fig. 11, a double vibration massage machine 50 shown in fig. 12, a rotary scrubber 51 shown in fig. 13, a light stirrer 52 shown in fig. 14, a heavy stirrer 53 shown in fig. 15, and an electric fan 54 shown in fig. 16 and 17, wherein the electric fan 54 shown in fig. 16 is an electric fan 54 placed on a table for use, and the electric fan 54 shown in fig. 17 is an electric fan 54 placed on a floor for use; in addition, the functional head can also be a noodle maker, a soybean milk machine, a fruit juice machine and other household appliances; wherein, the major structures of the fascia gun 47, the screwdriver, the electric wrench 48, the hedge trimmer 49, the double-vibration massage device 50, the rotary scrubbing machine 51, the light stirrer 52 and the heavy stirrer 53, as well as the electric fan 54, are all the structures of the household electrical appliances in the prior art, in addition, the household electrical appliances can also be individually designed and innovative structures, in the embodiment, the power input shaft of the household electrical appliances is connected with the inner quick-connection shaft 32 of the universal host machine through the functional shaft sleeve 11, a plurality of steel balls 38 of the inner quick-connection assembly 4 in the universal host machine are embedded in the inner quick-connection lower cover 37 to lock the functional shaft sleeve 11, thereby realizing the coaxial locking between the output shaft of the universal host machine and the power input shaft of the functional head, the functional head is rotationally clamped in the clamping groove 29 of the universal host machine through the clamping pin 10 at the end part of the functional shell 9, the rotary blocking disc 5 is pushed by the action of the spring force of the first spring 6, the functional shell 9 is rotationally clamped in the barb grooves 56 on the shell part through clamping bulges in the functional shell 9, for example, four barb grooves 56 are arranged on the functional shell 9, and the functional shell 9 is locked at the end part of the shell part under the action of the elastic force of the first spring 6; when the functional housing 9 needs to be detached, the functional housing 9 is pushed towards one side of the universal host 1, at the moment, the clamping protrusion is separated from the barb at the end part of the barb groove 56, and the functional housing 9 is rotated to realize the bouncing of the functional housing 9 and the barb.

The beneficial effects in this embodiment are: by replacing different functional heads, the different functional heads share one universal host, and independent multiple household appliances are not required to be purchased, the types of the household appliances in the prior art are various, and each household appliance is provided with a motor, a battery and a control circuit board, so that resources are wasted; the embodiment obviously reduces the cost of the household appliances, only needs to select and purchase the required functional heads, greatly saves energy and resources, and plays an extremely obvious role in the unified social progress of the household appliances.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims

1. A quick-change hand tool is characterized by comprising a universal machine body (1) and a functional head; the universal machine body (1) comprises an upper shell (2), a lower shell (3), a driving motor (19), an inner quick-connection assembly (4), a rotary baffle disc (5) and two first springs (6), wherein a functional shell (9) is fixed at the power input end of the functional head, and a functional shaft sleeve (11) is connected with the power input end of the functional head; the upper shell (2) and the lower shell (3) are buckled and connected to form a shell, a first accommodating cavity is formed in the shell, the driving motor (19) is arranged in the first accommodating cavity, an output shaft of the driving motor (19) is inserted into one end of the inner quick-connection assembly (4), and the other end of the inner quick-connection assembly (4) is inserted into the functional shaft sleeve (11); the rotary blocking disc (5) is elastically connected to one end of the shell through the two first springs (6), two clamping grooves (29) are formed in the side wall, located on the outer side of the rotary blocking disc (5), of the shell, two clamping pins (10) are fixed to the inner side wall of the functional shell (9), and the clamping pins (10) are arranged corresponding to the clamping grooves (29); when the clamping pin (10) is clamped in the clamping groove (29), the clamping pin (10) abuts against the rotary blocking disc (5); the functional head is a household appliance.

2. The quick-change hand tool according to claim 1, characterized in that the internal quick-connect assembly (4) comprises an internal quick-connect sleeve (31), an internal quick-connect shaft (32), an internal quick-connect base (33), a second spring (34), an internal quick-connect elastic column (35), an internal quick-connect washer (36), an internal quick-connect lower cover (37), a plurality of steel balls (38), an internal quick-connect upper cover (39) and a third spring (40); the inner quick connecting sleeve (31) is fixed on the outer peripheral side of the inner quick connecting shaft (32), a motor shaft hole (30) is formed in one end of the inner quick connecting shaft (32), an output shaft of the driving motor (19) is inserted into the motor shaft hole (30), an annular accommodating cavity is formed between the outer side wall of the other end of the inner quick connecting shaft (32) and the inner quick connecting sleeve (31), the inner quick connecting base (33) is sleeved on the outer peripheral side of the inner quick connecting shaft (32), and the middle part of the inner quick connecting base (33) abuts against the annular accommodating cavity in the inner quick connecting sleeve (31); the inner quick-connection elastic column (35) is sleeved on the outer peripheral side of the inner quick-connection shaft (32), the inner side wall of the inner quick-connection elastic column (35) is in sliding connection with the outer side wall of the inner quick-connection shaft (32), and the outer side wall of the inner quick-connection elastic column (35) is in sliding connection with the inner side wall of the inner quick-connection base (33); the second spring (34) is sleeved on the outer peripheral side of the joint of the inner quick-connection base (33) and the inner quick-connection elastic column (35), one end of the second spring (34) abuts against the inner quick-connection base (33), and the other end of the second spring (34) abuts against the inner quick-connection elastic column (35); one end of the inner quick-connection gasket (36) is sleeved and connected with one end, far away from the second spring (34), of the inner quick-connection elastic column (35), the outer side wall of the inner quick-connection gasket (36) is connected to the inner side wall of the inner quick-connection lower cover (37) in a sliding mode, and a plurality of round holes for the steel balls (38) to pass through are formed in the contact position of the inner quick-connection lower cover (37) and the inner quick-connection gasket (36); one end, far away from the steel ball (38), of the inner quick-connection lower cover (37) is inserted into an annular accommodating cavity of the inner quick-connection sleeve (31) and abuts against the inner quick-connection base (33); one end of the inner quick-connection upper cover (39) is sleeved on and slides on the outer peripheral side of the inner quick-connection sleeve (31), the middle part of the inner quick-connection upper cover (39) is sleeved on and slides on the outer peripheral side of the inner quick-connection lower cover (37), a plurality of steel balls (38) are arranged in a cavity between the other end of the inner quick-connection upper cover (39) and the inner quick-connection lower cover (37), one end of the third spring (40) abuts against the middle part of the inner quick-connection upper cover (39), and the other end of the third spring (40) abuts against the end face of the open end of the inner quick-connection sleeve (31); when the functional shaft sleeve (11) is inserted into an accommodating cavity between the inner quick-connection shaft (32) and the inner quick-connection lower cover (37), the steel balls (38) are locked in the annular groove on the outer periphery side of the functional shaft sleeve (11).

3. The quick-change hand tool according to claim 1, further comprising an identification module (13), an identification lead (14), an insert copper plate (7), a contact copper plate (8), a lock nut (12), a main circuit board (20) and a splitter plate (55); the main circuit board (20) is arranged on the back side of the driving motor (19), the separation plate (55) is arranged between the main circuit board (20) and the driving motor (19), and a control circuit is arranged on the main circuit board (20); the locking nut (12) is in threaded connection with a part, located outside the functional shell (9), of the clamping pin (10), the two clamping pins (10) are electrically connected through the identification lead (14), the identification lead (14) is provided with identification modules (13) used for identifying different functional heads, the identification modules (13) of the different functional heads are different, and the identification modules (13) are identification resistors or identification chips; the rotary blocking disc (5) is connected with the clamping pin (10) in an abutting mode, the insert copper sheet (7) is embedded in the position where the rotary blocking disc (5) abuts against the clamping pin (10), one end of the first spring (6) abuts against the insert copper sheet (7), the contact copper sheets (8) are fixed to the other end of the first spring (6), the two contact copper sheets (8) are respectively and electrically connected with the main circuit board (20), the driving motor (19) is electrically connected with the main circuit board (20), and the control circuit adjusts the rotating speed of the driving motor (19) according to signals of the identification module (13).

4. A quick-change hand tool according to claim 3, characterized in that it further comprises a decorative ring (15), a decorative ear (16) and a decorative sleeve (17); the decorative lugs (16) are respectively and correspondingly sleeved on the outer peripheral sides of the two locking nuts (12), the two decorative lugs (16) are connected through the decorative ring (15), the outer peripheral side of the identification wire (14) is sleeved through the decorative ring (15), and the decorative sleeve (17) is arranged at the connecting position of the shell part and the functional shell (9).

5. A quick-change hand tool according to claim 3, characterized in that the universal body (1) further comprises a heat-dissipating rear cover (21); the main circuit board (20) is provided with a display screen (41), a reduction button (42), a main power switch (43) and an increase button (44), the main power switch (43) is used for controlling the power on and off of the driving motor (19), the reduction button (42) is used for reducing the rotating speed of the driving motor (19), and the increase button (44) is used for increasing the rotating speed of the driving motor (19); the display screen (41) is used for displaying the category and gear information of the household appliances of the functional head; the display screen (41), the adjusting button (44), the main power switch (43) and the adjusting button (42) are all embedded on the heat dissipation rear cover (21), and a plurality of heat dissipation holes are further formed in the heat dissipation rear cover (21).

6. A quick-change hand tool according to claim 3, characterized in that the universal body (1) further comprises a soft rubber sleeve (26), a bottom cover (27) and a battery pack (28); the battery pack (28) is detachably connected in the lower shell (3) after penetrating through the soft rubber sleeve (26), and the battery pack (28) is enclosed in the soft rubber sleeve (26) and the lower shell (3) by the bottom cover (27); the battery pack (28) is electrically connected with the main circuit board (20); the bottom cover (27) is provided with a charging port (46), and the charging port (46) is electrically connected with the battery pack (28).

7. A quick-change hand tool according to claim 6, characterized in that the universal body (1) further comprises a quick-release button (25) and a plug-in connector (22); plug connecting piece (22) set up in connect the downside of subassembly (4) soon and with casing (3) fixed connection down, quick detach button (25) set up on the lateral wall of casing (3) down, the inboard butt of quick detach button (25) is on plug connecting piece (22), quick detach button (25) are used for pressing down the back fast with battery package (28) are released and are taken off.

8. A quick-change hand tool according to claim 3, characterized in that the universal body (1) further comprises a switch upper plate (23), a switch lower plate (24) and a branch switch (45); the upper switch plate (23) and the lower switch plate (24) are arranged on the lower shell (3), the sub-switch (45) is arranged on the lower switch plate (24), the upper end of the lower switch plate (24) is fixedly connected with one end of the upper switch plate (23), the other end of the upper switch plate (23) is bent to the back side of the driving motor (19), and the sub-switch (45) is electrically connected with the main circuit board (20); the branch switch (45) is used for operating the switch of the driving motor (19) when the quick-change type hand tool is held.

9. The quick-change hand tool according to claim 1, wherein the universal machine body (1) further comprises a motor bracket (18), the motor bracket (18) is sleeved on the outer peripheral side of the inner quick-connect component (4), one end of the motor bracket (18) is fixed on the housing of the driving motor (19), and the other end of the motor bracket (18) abuts against the inner bottom surface of the housing provided with one end of the rotary catch disc (5).

10. The quick-change hand tool according to any one of claims 1 to 9, wherein the functional head is any one of a fascial gun (47), an electric wrench (48), a hedge trimmer (49), a dual vibratory massager (50), a rotary scrubber (51), a light agitator (52), a heavy agitator (53) and an electric fan (54).