Drive module and electric device

Abstract

The utility model discloses a driving module and an electric device, wherein the driving module comprises a shell assembly, a driving assembly and a control assembly. The shell assembly comprises a shell body and a sensing part integrally connected to the shell body. The driving assembly is connected to the shell assembly, and the driving assembly comprises a motor and a transmission shaft connected to the motor. The control assembly is arranged in the shell assembly, and the control assembly comprises a controller and a sensor, and the sensor is arranged on the inner side of the sensing part to receive the sensing signal generated by the sensing part, and the controller can respond to the sensing signal and control the motor according to the sensing signal. In this scheme, since the shell body of the shell assembly of the driving module is integrally connected to the sensing part, there is no gap between the sensing part and the shell body. Compared with the structure in which the button passes through the opening of the shell body in the related art, in the utility model, external dust or water stains will not enter the shell through the gap between the sensing part and the shell body, thereby improving the waterproof and dustproof effect of the driving module.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a driving module and an electric device. Background Art

[0002] Electric rotary tools are widely used in various industries due to their high efficiency, portability, and ease of operation. In the related art, an opening is provided on the outer shell of the electric rotary tool, and the electric rotary tool includes a button that penetrates the opening. The user controls the working parameters of the electric rotary tool by pressing the button, such as the rotation speed and power on and off of the electric rotary tool. Since the outer periphery of the button cannot fit tightly with the hole wall of the opening on the outer shell, the inner cavity of the outer shell is connected to the outside world through the gap between the button and the hole wall of the opening, and external dust can enter the outer shell through the gap, thereby affecting the operation of the internal components of the electric rotary tool. In summary, the waterproof and dustproof effect of the electric rotary tool in the related art is poor. Utility Model Content

[0003] The main purpose of the utility model is to provide a driving module and an electric device, which can improve the waterproof and dustproof effects of the driving module.

[0004] To achieve the above purpose, the drive module proposed by the utility model includes:

[0005] A housing assembly, comprising a housing body and a sensing portion integrally connected to the housing body;

[0006] A driving assembly connected to the housing assembly, the driving assembly comprising a motor and a transmission shaft, the motor and the transmission shaft being in driving connection;

[0007] A control component is disposed in the housing component, the control component includes a controller and a sensor electrically connected to each other, the motor is electrically connected to the controller, the sensor is disposed on the inner side of the sensing part to receive the sensing signal generated by the sensing part, and the controller responds to the sensing signal and controls the motor according to the sensing signal.

[0008] In some embodiments, the driving module further includes a light-emitting component, the light-emitting component includes one or more light-emitting elements, and the controller is electrically connected to the light-emitting elements;

[0009] The controller is configured to adjust the light emitting parameters of the light emitting element according to the rotation speed of the transmission shaft.

[0010] In some embodiments, when there is one light-emitting element, the light-emitting element is a light strip, and the light-emitting length of the light-emitting element corresponds to the rotation speed of the transmission shaft.

[0011] In some embodiments, the drive assembly further comprises a battery;

[0012] The drive assembly also includes a switch, and the switch can move to a first position or a second position relative to the housing assembly. When the switch moves to the first position, the battery is electrically connected to the controller and the motor is turned on. When the switch moves to the second position, the battery and the controller are electrically disconnected and the motor is turned off. During the movement of the switch from the first position to the second position, the rotation speed of the transmission shaft decreases.

[0013] In some embodiments, the switch is rotatably connected to the shell body, and can rotate from the first position to the second position relative to the shell body.

[0014] In some embodiments, the driving module also includes a charging component, which is disposed in the outer shell component. The charging component has a charging socket, which is opened in the shell body, and the charging socket is electrically connected to the battery through the controller.

[0015] In some embodiments, the drive module also includes a limit assembly, which has a first working state and a second working state. When the limit assembly is in the first working state, the transmission shaft rotates, and when the limit assembly is in the second working state, the transmission shaft stops rotating.

[0016] In some embodiments, the limit assembly includes a stop pin, a stop spring and a button, the stop pin is connected to the button through the stop spring, the button is movably connected to the shell body, the button has an edge portion formed along its circumference, the transmission shaft has a limit portion, when the limit assembly is in a first state, the edge portion abuts against the shell body, the stop pin is disengaged from the limit portion, when the limit assembly is in a second state, the edge portion is away from the shell body, and the stop pin is engaged with the limit portion.

[0017] In some embodiments, the sensing portion has an inner side and an outer side opposite to each other, and the sensing portion is recessed from the outer side toward the inner side.

[0018] In some embodiments, the sensor is a pressure sensor, and the pressure sensor contacts the sensing portion to obtain the pressure exerted on the sensing portion;

[0019] Alternatively, the sensor is a temperature sensor, and the temperature sensor contacts the sensing portion to obtain the temperature of the sensing portion.

[0020] The second aspect of the utility model also provides an electric device, comprising:

[0021] The driving module as described in any one of the above embodiments;

[0022] The functional module is detachably connected to the driving module, and the functional module includes a functional head, and the functional head is detachably connected to the transmission shaft of the driving module.

[0023] In some embodiments, the electric device further includes a locking module, and the functional module is detachably connected to the driving module via the locking module.

[0024] In some embodiments, the locking module comprises a chuck and a chuck locking cap, the chuck locking cap is sleeved on the chuck, the chuck locking cap has a locking position and an unlocking position relative to the chuck, a locking hole is provided in the chuck locking cap, the locking hole is threadedly connected to the axial surface of the transmission shaft, the chuck comprises a clamping portion and a connecting portion, the transmission shaft is provided with an axial hole, the connecting portion is threadedly connected to the axial hole;

[0025] The clamping part is provided with a gap. When the clamp lock cap is in the locking position, the gap is reduced and the clamping part clamps the functional head. When the clamp lock cap is in the unlocking position, the gap is opened and the clamping part releases the functional head.

[0026] In some embodiments, the electric device also includes an identification module, and the functional module is electrically connected to the driving module through the identification module. The identification module is used to detect the resistance signal of the functional module and transmit the resistance signal to the controller, and the controller controls the output speed of the motor according to the resistance signal.

[0027] In some embodiments, the identification module includes a conductive ring and at least two conductive contacts, the conductive ring is arranged at one end of the functional head close to the transmission shaft, the conductive contacts are arranged at intervals on the conductive ring, the conductive ring is electrically connected to the controller through the conductive contacts, the conductive ring is used to detect the resistance signal of the functional head, and the conductive contacts are used to transmit the resistance signal to the controller.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] In the technical solution of the present utility model, the driving module includes a shell assembly, a driving assembly and a control assembly. Among them, the shell assembly includes a shell body and a sensing part integrally connected to the shell body, and the driving assembly is connected to the shell assembly, and the driving assembly includes a motor and a transmission shaft connected to the motor. The control assembly is arranged in the shell assembly, and the control assembly includes a controller and a sensor, and the sensor is arranged on the inner side of the sensing part to receive the sensing signal generated by the sensing part, and the controller can respond to the sensing signal and control the motor arranged in the shell according to the sensing signal. In this solution, since the shell body of the shell assembly of the driving module is integrally connected with the sensing part, there is no gap between the sensing part and the shell body. Compared with the structure of the button passing through the opening of the shell body in the related art, in the present utility model, external dust or water stains will not enter the shell through the gap between the sensing part and the shell body, thereby improving the waterproof and dustproof effect of the driving module. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a driving module in one embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the structural decomposition of a driving module in one embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the drive module after removing the outer shell in one embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the structure of a functional head in an embodiment of the utility model; wherein a conductive ring piece is provided at one end of the functional head;

[0035] Figure 5 It is a schematic diagram of the position of the conductive ring piece after being connected to the conductive contact point in one embodiment of the utility model;

[0036] Figure 6 It is a schematic diagram of the position of the conductive ring piece after being connected to the conductive contact point in another embodiment of the utility model;

[0037] Figure 7 It is a schematic diagram of a flow chart of a control method for controlling a driving device in one embodiment of the utility model.

[0038] Description of Figure Numbers:

[0039] Drive module 100; shell assembly 110; shell body 111; first port 1111; second port 1112; through hole 1113; hand-held part 1114; sensing part 112; switch 113; inner shell 114; drive assembly 120; motor 121; transmission shaft 122; first end 1221; second end 1222; limit part 1223; control assembly 130; controller 131; sensor 132; light-emitting assembly 140; light strip 141; charging assembly 150; charging socket 151; limit assembly 160; stop pin 161; stop spring 162; button 163; edge part 1631; locking module 170; clamp 171; clamp lock cap 172; battery 180; functional module 200; identification module 300; conductive contact 310; conductive ring 320.

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] See also Figures 1 to 6 The utility model provides a driving module 100, which includes a shell component 110, a driving component 120 and a control component 130. The shell component 110 can be prepared in an integrated manner. The shell component 110 includes a shell body 111 and a sensing part 112, wherein the sensing part 112 is integrally connected to the shell body 111, which effectively prevents foreign matter (dust, water and other external substances) from entering the shell component 110 and affecting the normal operation of the driving component 120 and the control component 130, effectively improving the dustproof and waterproof effects of the driving module 100, thereby increasing the service life of the driving module 100. The sensing part 112 is configured to correspond to the shape of the fingertips of a human finger, which improves the aesthetics of the driving module 100 while facilitating the staff to control the working state of the driving module 100.

[0043] See also Figure 1In some embodiments, the shell body 111 includes a handheld portion 1114 suitable for hand-holding, and the sensing portion 112 is arranged at a position in the housing assembly 110 away from the handheld portion 1114 to prevent the staff from accidentally touching the sensing portion 112 when grasping the driving module 100 during use of the driving module 100. The driving assembly 120 includes a motor 121 and a transmission shaft 122. The motor 121 can drive the transmission shaft 122 to rotate around its own axis. The motor 121 is arranged in the housing assembly 110. The transmission shaft 122 has a first end 1221 and a second end 1222 opposite to each other. The first end 1221 is arranged in the housing assembly 110 and driven by the motor 121, and the second end 1222 passes through the housing assembly 110 and is used to output torque.

[0044] The control component 130 is disposed in the housing component 110, and the control component 130 includes a controller 131 and a sensor 132 that are electrically connected to each other. The motor 121 of the driving component 120 is electrically connected to the controller 131, and the sensor 132 is disposed on the inner side of the sensing part 112 to obtain the sensing signal generated by the sensing part 112 (the sensing signal includes but is not limited to pressure, temperature, etc., and for ease of expression, the sensing signal is taken as a pressure signal for example below). The controller 131 responds to the sensing signal and controls the motor 121 to drive the transmission shaft 122 at a corresponding speed according to the sensing signal.

[0045] In some embodiments, the controller 131 can also be used to control the start and stop of the motor 121. It should be noted that the "corresponding speed" stated in "the motor 121 drives the transmission shaft 122 at a corresponding speed" includes but is not limited to: the speed required for the transmission shaft 122 when the drive module 100 is used for engraving, the speed required for the transmission shaft 122 when the drive module 100 is used for grinding, the speed required for the transmission shaft 122 when the drive module 100 is used for drilling, the speed required for the transmission shaft 122 when the drive module 100 is used for polishing, and the speed required for the transmission shaft 122 when the drive module 100 is used for cutting. In some embodiments, the drive module 100 also includes an inner shell 114, which is disposed in the shell body 111, and the drive assembly 120 and the control assembly 130 are disposed in the inner shell 114, and the inner shell 114 can provide protection for the drive assembly 120 and the control assembly 130.

[0046] See also Figure 1 and Figure 3 The driving module 100 further includes a light emitting assembly 140 , which includes one or more light emitting elements. The controller 131 is electrically connected to the light emitting elements. The controller 131 is configured to adjust the light emitting parameters of the light emitting elements according to the rotation speed of the transmission shaft 122 .

[0047] In some embodiments, when there is one light-emitting element, the light-emitting element is a light strip 141, and the light-emitting length of the light-emitting element corresponds to the rotation speed of the transmission shaft 122. Specifically, the light strip 141 is configured to display different lengths, and the light-emitting assembly 140 is configured to make the length of the light strip 141 correspond to the rotation speed of the transmission shaft 122. The longer the length displayed by the light strip 141, the higher the rotation speed of the transmission shaft 122, and the shorter the length displayed by the light strip 141, the lower the rotation speed of the transmission shaft 122.

[0048] In other embodiments, the light-emitting assembly 140 includes a plurality of light-emitting lamps, each light-emitting lamp being arranged at intervals along a straight line. In one embodiment, the light-emitting assembly 140 is configured so that the number of light-emitting lamps corresponding to the rotation speed of the transmission shaft 122, wherein the more light-emitting lamps that emit light, the higher the rotation speed of the corresponding transmission shaft 122, and the fewer light-emitting lamps that emit light, the lower the rotation speed of the corresponding transmission shaft 122. In another embodiment, the light-emitting assembly 140 is provided with an initial position, and each light-emitting lamp is arranged at intervals along a straight line from the initial position, so that the farther the light-emitting lamp from the initial position emits light, the higher the rotation speed of the corresponding transmission shaft 122, and the closer the light-emitting lamp from the initial position emits light, the lower the rotation speed of the corresponding transmission shaft 122.

[0049] In some other embodiments, the light-emitting component 140 can display different colors, and the light-emitting component 140 is configured to display different colors to correspond to different rotation speeds of the transmission shaft 122. For ease of description, it is defined that when the light-emitting component 140 displays blue, it corresponds to the first rotation speed of the transmission shaft 122, when the light-emitting component 140 displays yellow, it corresponds to the second rotation speed of the transmission shaft 122, when the light-emitting component 140 displays orange, it corresponds to the third rotation speed of the transmission shaft 122, and when the light-emitting component 140 displays red, it corresponds to the fourth rotation speed of the transmission shaft 122. Among them, the first rotation speed is less than the second rotation speed, the second rotation speed is less than the third rotation speed, and the third rotation speed is less than the fourth rotation speed. The setting of the light-emitting component 140 is conducive to the staff to intuitively and quickly understand the rotation speed of the motor 121, so that the staff can adjust the pressure applied to the sensing part 112 in time, and then control the rotation speed output by the motor 121.

[0050] See also Figure 2, the drive assembly 120 also includes a battery 180 and a switch 113. The switch 113 can move to a first position or a second position relative to the housing assembly 110. When the switch 113 moves to the first position, the battery 180 is electrically connected to the controller 131, and the motor 121 is turned on. When the switch 113 moves to the second position, the battery 180 and the controller 131 are electrically disconnected, and the motor 121 is turned off. During the movement of the switch 113 from the first position to the second position, the rotation speed of the transmission shaft 122 decreases. In some embodiments, the movement of the switch 113 relative to the housing assembly 110 includes but is not limited to rotation, that is, the switch 113 can be rotatably connected to the shell body 111, and can be rotated from the first position to the second position relative to the shell body 111. In other embodiments, the switch 113 can also slide to the first position and the second position relative to the housing assembly 110, which will not be described in detail here.

[0051] Specifically, the shell body 111 has a first port 1111 and a second port 1112. The first port 1111 and the second port 1112 are arranged opposite to each other along the axial direction of the transmission shaft 122, and the second end 1222 passes through the first port 1111. The switch 113 is arranged at the second port 1112. The switch 113 can be sleeved on the outer wall of the shell body 111 at one end close to the second port 1112, or the switch 113 can be arranged on the side of the second port 1112 away from the first port 1111. The switch 113 is configured to be able to rotate to a first position or a second position around the axis of the second port 1112 relative to the shell body 111. When the switch 113 rotates to the first position, the controller 131 controls the motor 121 to be in an enabled state, that is, the motor 121 is in a state of being connected to the battery 180. When the switch 113 rotates to the second position, the controller 131 controls the motor 121 to be in an off state. Since a certain torque is required when the switch 113 switches from the first position to the second position or from the second position to the first position, during the transportation and use of the driving module 100, foreign objects can easily contact the driving module 100, but it is difficult for foreign objects to generate torque on the driving module 100 so that the switch 113 can switch between the first position and the second position. Therefore, the setting of the switch 113 further reduces the probability of false touches when the working state of the driving module 100 is turned on and off. In some embodiments, the sensor 132 provided on the inner side of the sensing portion 112 can be used to control the speed output by the motor 121, and the switch 113 can be used to control the turning on and off of the working state of the driving module 100.

[0052] In one embodiment, the driving module 100 includes a light emitting component 140, and the switch 113 can control the light emitting component 140 to turn on or off. In another embodiment, the switch 113 can be used to control the power on or off of the driving module 100, and can also be used to control the light emitting component 140 to turn on or off.

[0053] In some embodiments, when the switch 113 is in the first position, the switch 113 can be configured to be able to rotate to multiple gears relative to the shell body 111 around the axis of the second port 1112. When the switch 113 rotates to each gear, the controller 131 controls the motor 121 to be in an enabled state, and controls the transmission shaft 122 to have a corresponding speed range; the speed ranges corresponding to at least two first positions are different. Specifically, each first position can correspond to engraving operations, grinding operations, drilling operations, polishing operations, and cutting operations. Exemplarily, in the grinding operation, the speed range of the transmission shaft 122 can be 0 to n1rpm, where n1 is 1000 to 3000. When the switch 113 is rotated to the first position corresponding to the grinding operation, the controller 131 can respond to the pressure of the sensor 132 to control the transmission shaft 122 to rotate between 0 and n1rpm. In the cutting operation, the speed range of the transmission shaft 122 can be 0 to n2rpm, where n2 is 5000 to 15000. When the switch 113 is turned to the gear corresponding to the cutting operation, the controller 131 can control the transmission shaft 122 to rotate between 0 and n2 rpm in response to the pressure of the sensor 132. The speed range of the transmission shaft 122 is controlled by the pressure sensing of the sensor 132 arranged inside the sensing part 112 to achieve the regulation of the speed range.

[0054] See also Figures 1 to 3 The driving module 100 further includes a charging component 150, which is disposed in the housing component 110. The charging component 150 has a charging socket 151, which is opened in the shell body 111, and the charging socket 151 is electrically connected to the battery 180 through the controller 131. Specifically, the charging component 150 is disposed on the side of the second port 1112 away from the first port 1111, and the switch 113 is arranged around the charging component 150, and the charging socket 151 is disposed away from the second port 1112. The charging socket 151 can charge the battery 180 disposed in the shell body 111. The arrangement of the charging socket 151 and the battery 180 enables the driving module 100 to work anywhere without relying on a specific power socket or power supply location, thereby improving the convenience and flexibility of the driving module 100, and also helps to reduce the replacement frequency of cables and batteries 180, thereby saving the maintenance cost of the driving module 100. In some embodiments, the driving module 100 is provided with a power indicator light, which is provided on the side of the second port 1112 away from the first port 1111. The power indicator light is electrically connected to the controller 131, and the controller 131 can monitor the voltage of the battery 180 of the driving module 100, and feedback the power of the battery 180 by controlling the display color of the power indicator light (or the display quantity of the power indicator light).

[0055] See also Figure 2 and Figure 3 The driving module 100 further includes a limit assembly 160, which has a first working state and a second working state. When the limit assembly 160 is in the first working state, the transmission shaft 122 rotates, and when the limit assembly 160 is in the second working state, the transmission shaft 122 stops rotating. The limit assembly 160 can be of various structures, which are not limited here.

[0056] In some embodiments, when the limit assembly 160 is in the second working state, the limit assembly 160 contacts the transmission shaft 122 and generates a friction force in the opposite direction of rotation of the transmission shaft 122. The friction force can offset the torque of the transmission shaft 122 so that the transmission shaft 122 is stationary relative to the housing assembly 110.

[0057] In other embodiments, the limit assembly 160 includes a stop pin 161, a stop spring 162 and a button 163, the stop pin 161 is connected to the button 163 through the stop spring 162, the button 163 is movably connected to the shell body 111, the button 163 is formed with an edge portion 1631 along its circumference, the transmission shaft 122 is provided with a limit portion 1223, when the limit assembly 160 is in the first state, the edge portion 1631 abuts against the shell body 111, and the stop pin 161 is disengaged from the limit portion 1223, when the limit assembly 160 is in the second state, the edge portion 1631 is away from the shell body 111, and the stop pin 161 is penetrated through the through hole 1113 and engaged with the limit portion 1223. It should be noted that the shell body 111 has a first port 1111 and a second port 1112. The first port 1111 and the second port 1112 are arranged opposite to each other along the axial direction of the transmission shaft 122, and the second end 1222 passes through the first port 1111; a through hole 1113 is provided at one end of the shell body 111 close to the first port 1111, and the limiting portion 1223 faces the through hole 1113.

[0058] The limiting portion 1223 disposed on the transmission shaft 122 may be a groove, a through hole, a buckle, etc. Specifically, when the limiting portion 1223 is a through hole, when the limiting assembly 160 is in the first working state, the stop pin 161 is separated from the limiting portion 1223 of the transmission shaft 122, so that the transmission shaft 122 can rotate with the motor 121. When the limiting assembly 160 is in the second working state, the stop pin 161 is penetrated through the through hole 1113 and the limiting portion 1223, thereby preventing the transmission shaft 122 from rotating. In some implementation scenarios, the limiting assembly 160 can fix the transmission shaft 122 so that it can be stationary relative to the housing assembly 110, and press the button 163, so that the stop pin 161 is inserted into the limiting portion 1223 of the transmission shaft 122. When the pressure on the button 163 is removed, under the elastic action of the stop spring 162, the stop pin 161 can be separated from the limiting portion 1223 of the transmission shaft 122.

[0059] In some embodiments, the sensing portion 112 has an inner side and an outer side relative to each other, and the sensing portion 112 is recessed from the outer side toward the inner side. That is, the outer surface of the sensing portion 112 is recessed, and the sensing portion 112 is recessed toward the inside of the housing assembly 110. The outer surface of the sensing portion 112 is lower than the outer surface of the shell body 111. When a foreign object contacts the driving module 100, it will be supported by the shell body 111 and it is difficult to act on the sensing portion 112. Therefore, the driving module 100 of the present application can effectively prevent foreign objects from acting on the sensor 132, further effectively reducing the probability of the sensor 132 being accidentally touched.

[0060] It should be noted that the sensor 132 may be a pressure sensor, which contacts the sensing part 112 to obtain the pressure exerted on the sensing part 112. The sensor 132 may also be a temperature sensor, which contacts the sensing part 112 to obtain the temperature of the sensing part 112. In some embodiments, the sensor 132 includes a pressure sensor and a temperature sensor, the pressure sensor is used to obtain the pressure exerted on the sensing part 112, and the temperature sensor is used to obtain the temperature of the sensing part 112. When the pressure information obtained by the pressure sensor meets the preset pressure data and the temperature information obtained by the temperature sensor meets the preset temperature data, the communication between the controller 131 and the sensor 132 is activated, and the controller 131 can adjust the rotation speed of the transmission shaft 122 according to the pressure information obtained by the pressure sensor. If the information obtained by either the pressure sensor or the temperature sensor does not meet the preset information, the communication between the controller 131 and the sensor 132 is always closed. Therefore, the drive module 100 of the present application has a very high anti-mistouch function.

[0061] The second aspect of the utility model also provides an electric device, which includes a driving module 100 and a functional module 200 described in any of the above embodiments, wherein the functional module 200 is detachably connected to the driving module 100, and the functional module 200 includes a functional head, which is detachably connected to the transmission shaft 122 of the driving module 100. Among them, the functional head is of various types, and any type of functional head is detachably connected to the second end 1222 of the transmission shaft 122 of the driving module 100. The functional head can be a carving head, a drill bit, a cutting tool, a grinding head, and a polishing head, etc., and illustratively, the functional head is a grinding head. The functional module 200 can increase the function of the electric device and improve its scope of application. The motor 121 can drive the functional head to perform operations such as drilling or cutting.

[0062] Furthermore, the appearance of the electric device can be an integrated long cylindrical shape, thereby improving the user experience and the aesthetics of the electric device.

[0063] The electric device further includes a locking module 170, through which the functional module 200 is detachably connected to the driving module 100. The setting of the locking module 170 improves the connection reliability between the functional module 200 and the driving module 100. Specifically, in some embodiments, the locking module 170 includes a chuck 171 and a chuck lock cap 172, the chuck lock cap 172 is sleeved on the chuck 171, the chuck lock cap 172 has a locking position and an unlocking position relative to the chuck 171, a locking hole is provided in the chuck lock cap 172, the locking hole is threadedly connected to the axial surface of the transmission shaft 122, the chuck 171 includes a clamping portion and a connecting portion, the transmission shaft 122 is provided with an axial hole, and the connecting portion is threadedly connected to the axial hole. The clamping portion is provided with a gap, when the chuck lock cap 172 is in the locking position, the gap is reduced, the clamping portion clamps the functional head, and when the motor 121 drives the transmission shaft 122 to rotate, the functional head can rotate with the transmission shaft 122. When the clamp lock cap 172 is in the unlocked position, the gap is opened and the clamping part releases the functional head to facilitate the replacement of functional heads of different models.

[0064] The electric device also includes an identification module 300, through which the functional module 200 is electrically connected to the driving module 100, and the identification module 300 is used to detect the resistance signal of the functional module 200 and transmit the resistance signal to the controller 131, and the controller 131 controls the output speed of the motor 121 according to the resistance signal. That is, the identification module 300 can identify the model of the functional head according to the resistance signal of the functional head mounted on the second end 1222, and the controller 131 controls the speed range of the transmission shaft 122 according to the model. Exemplarily, if the functional head mounted on the second end 1222 is a grinding head, the identification module 300 detects the resistance signal of the functional head and transmits the signal to the controller 131, and the controller 131 controls the speed of the transmission shaft 122 in the range of 0 to n1rpm according to the signal. When the functional head mounted on the second end 1222 is a cutting tool, the identification module 300 detects the resistance signal of the functional head and inputs another signal to the controller 131. The controller 131 controls the rotation speed of the transmission shaft 122 in the range of 0 to n2 rpm according to the received signal.

[0065] See also Figure 2 , Figure 5 and Figure 6The identification module 300 includes a conductive ring 320 and at least two conductive contacts 310. The conductive ring 320 is arranged at one end of the functional head close to the transmission shaft 122. The conductive contacts 310 are arranged at intervals on the conductive ring 320. The conductive ring 320 is electrically connected to the controller 131 through the conductive contacts 310. The conductive ring 320 is used to detect the resistance signal of the functional head, and the conductive contacts 310 are used to transmit the resistance signal to the controller 131. Specifically, the conductive contacts 310 are arranged at intervals on the side of the second end 1222 away from the first end 1221, and the two conductive contacts 310 are electrically connected to the controller 131 respectively. Each functional head is provided with a conductive ring 320, and the conductive ring 320 can be configured as a circular ring or a polygonal shape. After each functional head is connected to the second end 1222, the two conductive contacts 310 respectively abut against two different positions of the conductive ring 320. Functional heads of different models are connected to different models of conductive rings 320, so that the resistance between the two conductive contacts 310 of the conductive rings 320 of different models of functional heads is different. The controller 131 can receive a signal of the resistance between the two conductive contacts 310 and identify the model of the corresponding functional head according to the resistance. It should be noted that the difference in the model of the conductive ring 320 includes, but is not limited to: the sizes of the conductive rings 320 of different functional heads are different, the materials of the conductive rings 320 of different functional heads are different, the shapes of the conductive rings 320 of different functional heads are different, etc.

[0066] In some embodiments, the sizes of the conductive rings 320 of different types of functional heads are different, so that the resistance of the parts of the conductive rings 320 of different types located between the two conductive contacts 310 is different. For ease of description, the following description is given by taking the conductive ring 320 in a circular ring shape as an example. Exemplarily, if the first functional head is a drill bit, a conductive ring 320 of the first type is provided on the drill bit, and the size from the inner wall to the outer wall of the conductive sheet of the first type is the first size. If the second functional head is an engraving head, a conductive ring 320 of the second type is provided on the engraving head, and the size from the inner wall to the outer wall of the conductive ring 320 of the second type is the second size. The maximum diameter of the conductive ring 320 of the first type is equal to the maximum diameter of the conductive ring 320 of the second type, and the first size is not equal to the second size. Thus, after the conductive ring 320 of the first type abuts against the two conductive contacts, there is a first resistance between the two conductive contacts, and after the conductive ring 320 of the second type abuts against the two conductive contacts, there is a second resistance between the two conductive contacts, and the first resistance is not equal to the second resistance. The controller 131 can compare the first resistor and the second resistor with the preset resistance value of each functional head, so as to identify the model of the corresponding functional head. In other embodiments, the resistivity of the conductive ring 320 of different types of functional heads is different, so that the resistance of the portion of the conductive ring 320 of different types located between the two conductive contacts 310 is different. That is, the conductive ring 320 of different functional heads is made of materials with different resistivities, and the size of each conductive ring 320 is the same.

[0067] See also Figure 7 In some implementations, the control method of the electric device described in any of the above embodiments and implementations includes but is not limited to the following steps:

[0068] S101: The controller 131 obtains the pressure value of the sensing part 112;

[0069] S102: If the controller 131 determines that the pressure value of the sensing portion 112 is greater than the preset pressure value, the controller 131 adjusts the driving power of the motor 121;

[0070] S103: the controller 131 adjusts the light-emitting parameters of the light-emitting assembly 140 so that the light-emitting parameters correspond to the driving power of the motor 121;

[0071] S104: The controller 131 obtains the model information of the functional head through the conductive ring 320 and the conductive contact 310;

[0072] S105: The controller 131 adjusts the rotation speed range of the transmission shaft 122 according to the model information of the functional head.

[0073] Specifically, taking the functional head as a grinding head as an example, the speed range of the transmission shaft 122 is 0 to 2000 rpm, assuming that the speed of the motor 121 is equal to the speed of the transmission shaft 122. Therefore, the speed range of 0 to 2000 rpm can be divided into four gears of 0 to 500 rpm, 500 to 1000 rpm, 1000 to 1500 rpm and 1500 to 2000 rpm. Taking the sensing signal obtained by the sensing part 112 as pressure as an example, when the pressure value of the sensing part 112 is greater than the preset pressure value, the speed range of the motor 121 can be switched between the above four gears, and the light-emitting parameters of the light-emitting component 140 will change accordingly. In some embodiments, the light-emitting parameters of the light-emitting component 140 can be changed before the speed range of the transmission shaft 122 is adjusted. In other embodiments, the light-emitting parameters of the light-emitting component 140 can be changed synchronously with the speed range of the transmission shaft 122. For example, the speed range of the motor 121 can be adjusted from 0 to 500 rpm to 500 to 1000 rpm, or from 1500 to 2000 rpm to 0 to 500 rpm, etc. Thus, the parameters of the light-emitting parameters of the light-emitting component 140 corresponding to the actual speed of the transmission shaft 122 are changed. Taking the light-emitting component 140 including the light strip 141 as an example, when the gear of the speed range of the motor 121 gradually increases, the light-emitting length of the light strip 141 gradually increases.

[0074] In some embodiments, the light-emitting component 140 includes a light-emitting element, which is a light strip 141, and the light strip 141 is configured to display different lengths; the step of adjusting the light-emitting parameters of the light-emitting component 140 so that the light-emitting parameters correspond to the driving power of the motor 121 includes: when the driving power of the motor is increased, the displayed length of the light strip 141 becomes longer; when the driving power of the motor is decreased, the displayed length of the light strip 141 becomes shorter.

[0075] In other embodiments, the light-emitting component 140 includes a plurality of light-emitting lamps, and each light-emitting lamp is arranged at intervals along a straight line; the step of adjusting the light-emitting parameters of the light-emitting component 140 so that the light-emitting parameters correspond to the driving power of the motor 121 includes: when the driving power of the motor is increased, the number of lights emitted by the light-emitting lamp increases; when the driving power of the motor is decreased, the number of lights emitted by the light-emitting lamp decreases.

[0076] In some other embodiments, the driving module 100 also includes a light-emitting component 140, which can display different colors. The step of adjusting the light-emitting parameters of the light-emitting component 140 so that the light-emitting parameters correspond to the driving power of the motor 121 includes: adjusting the light-emitting component 140 to display colors of different hues.

[0077] After the step of obtaining the pressure value of the sensing part 112, the following steps are also included:

[0078] If the pressure value of the sensing part 112 is greater than the preset pressure value and the pressure is maintained for more than the preset time, the driving power of the motor 121 is continuously adjusted, and the number of adjustments is a multiple of the maintenance time exceeding the preset time. In some embodiments, the controller 131 is provided with a speed regulating switch, and the sensor 132 provided inside the sensing part 112 can receive the surface pressure of the sensing part 112 and transmit it to the trigger area of ​​the speed regulating switch provided on the controller 131, thereby realizing the cyclic control of the speed of the transmission shaft 122. For ease of description, the preset time is defined as 2 seconds. Therefore, when the pressure applied to the sensing part 112 is maintained for 2 seconds, taking the functional head as a grinding head as an example, the speed range of the transmission shaft 122 from 0 to 2000 rpm is divided into four gears of 0 to 500 rpm, 500 to 1000 rpm, 1000 to 1500 rpm and 1500 to 2000 rpm, and the number of times the driving power of the motor 121 is adjusted is once, that is, the speed range of the transmission shaft 122 can be adjusted from 0 to 500 rpm to 500 to 1000 rpm, or from 1000 to 1500 rpm to 1500 to 2000 rpm. When the pressure applied to the sensing part 112 is maintained for 4 seconds, the number of times the driving power of the motor 121 is adjusted is 2 times, that is, the speed range of the transmission shaft 122 can be adjusted from 0 to 500 rpm to 1000 to 1500 rpm. When the pressure applied to the sensing portion 112 is maintained for 3 seconds, the driving power of the motor 121 is adjusted once, and the speed range of the transmission shaft 122 can be adjusted from 500-1000rpm to 1000-1500rpm, or from 1500-2000rpm to 0-500rpm.

[0079] In some embodiments, the control method further comprises the steps of:

[0080] Obtain the model of the functional head connected to the second end 1222;

[0081] The speed range of the transmission shaft 122 is adjusted according to the model of the functional head.

[0082] Specifically, if the functional head connected to the second end 1222 is a grinding head, the controller 131 can adjust the speed range of the transmission shaft 122 to 0-n1rpm, so that the maximum speed of the transmission shaft 122 when the electric device is working can be n1rpm. The actual speed of the transmission shaft 122 can be adjusted by the controller 131. Specifically, the controller 131 can switch the speed gear between 0-n1rpm according to the pressure value and pressure maintenance time of the sensing part 112. If the functional head connected to the second end 1222 is a cutting tool, the controller 131 can adjust the speed range of the transmission shaft 122 to 0-n2rpm. Therefore, the maximum speed of the transmission shaft 122 when the electric device is working can be n2rpm. The actual speed of the transmission shaft 122 can be adjusted by the controller 131. Specifically, the controller 131 can switch the speed gear between 0-n2rpm according to the pressure value and pressure maintenance time of the sensing part 112.

[0083] In some embodiments, the identification module 300 includes a conductive contact 310 and a conductive ring 320, and the model identification function of the functional head is implemented by the identification module 300. The step of obtaining the model of the functional head connected to the second end 1222 includes:

[0084] The resistance between the two conductive contacts 310 is obtained, a comparison table of resistance and functional head model is obtained, and the model of the functional head connected to the second end 1222 is determined according to the resistance and the comparison table.

[0085] The steps of adjusting the speed range of the transmission shaft 122 according to the model of the functional head include:

[0086] Obtain a comparison table of the functional head model and the speed range, and determine the speed range according to the functional head model and the comparison table;

[0087] Obtain the number of gears of the drive module 100, determine the speed value corresponding to each gear according to the speed range, so that the speed values ​​corresponding to each gear are distributed in an arithmetical manner. The speed values ​​corresponding to each gear can also be distributed in an increasing form, and the speed value corresponding to the highest gear is equal to the highest speed value of the speed range.

[0088] Exemplarily, if the electric device is to be used for grinding operation, first, the electric device is controlled to be in the off state (or the electric device is in the on state, but the motor 121 is controlled to be in the stationary state), and the button 163 is pressed so that the stop pin 161 is inserted into the limit portion 1223 of the transmission shaft 122, thereby limiting the transmission shaft 122 from rotating. One end of the functional head (grinding head) provided with a conductive ring 320 is connected to the second end 1222 of the transmission shaft 122, and the two conductive contacts 310 electrically connected to the controller 131 are electrically connected to the conductive ring 320 (in one embodiment, the two conductive contacts 310 abut against the conductive ring 320 to achieve electrical connection). Then, the pressure applied to the button 163 is removed so that the stop pin 161 is disengaged from the limit portion 1223 of the transmission shaft 122. The control electric device is in the power-on state, and the controller 131 can obtain the resistance value between the two conductive contacts 310, and compare the resistance value with the resistance comparison table of the conductive ring 320 of each functional head stored in the controller 131, so as to obtain the model of the functional head (the model represents the type of the functional head, and the type of the functional head includes but is not limited to engraving head, grinding head, polishing head, cutting tool, drill bit, etc.). The controller 131 adjusts the speed range of the transmission shaft 122 according to the obtained model information of the functional head so that the speed range is suitable for the operation type of the functional head (the operation type of the functional head includes but is not limited to: engraving, drilling, cutting, grinding and polishing, etc., and the speed range required for the operation type of each functional head is different). After determining the speed range of the transmission shaft 122, the controller 131 can divide the speed range into multiple gears, and the speed of each gear can be distributed in an equidistant manner (the speed of each gear can also be distributed in an increasing form, that is, the speed difference of each gear can be different). At the same time, the controller 131 adjusts the light-emitting parameters of the light-emitting component 140 (taking the light-emitting module including the light strip 141 as an example) so that the light-emitting length of the light strip 141 corresponds to the rotational speed of the transmission shaft 122. The pressing sensing part 112 is used to adjust the rotational speed of the transmission shaft 122 within the rotational speed range. The higher the rotational speed of the transmission shaft 122, the longer the light-emitting length of the light strip 141. When the rotational speed of the transmission shaft 122 reaches the highest position in the rotational speed range, the light strip 141 can show the longest light-emitting length. It should be noted that the method of pressing the sensing part 112 can be a long press, that is, the longer the duration of the press, the higher the corresponding rotational speed of the transmission shaft 122. The method of pressing the sensing part 112 can also be a continuous short press, that is, the more short presses are performed, the higher the corresponding rotational speed of the transmission shaft 122.

[0089] When the functional head of the electric device needs to be replaced, the second functional head is used to replace the first functional head connected to the transmission shaft 122 as an example. First, the sensing part 112 is pressed to adjust the speed of the transmission shaft 122 to zero, and pressure is applied to the button 163 to insert the stop pin 161 into the limit portion 1223 of the transmission shaft 122. The first functional head is removed, and one end of the second functional head provided with a conductive ring 320 is connected to the second end 1222 of the transmission shaft 122, and the two conductive contacts 310 electrically connected to the controller 131 are electrically connected to the conductive ring 320, and then the pressure applied to the button 163 is canceled, so that the stop pin 161 is separated from the limit portion 1223 of the transmission shaft 122. The controller 131 can obtain the resistance value between the two conductive contacts 310, and compare the resistance value with the resistance comparison table of the conductive ring 320 of each functional head stored in the controller 131, so as to obtain the model of the second functional head. The controller 131 adjusts the speed range of the transmission shaft 122 according to the model information of the second functional head so that the speed range is suitable for the operation type of the second functional head. At the same time, the controller 131 adjusts the light-emitting parameters of the light-emitting component 140 (taking the light-emitting module including the light strip 141 as an example) so that the light-emitting length of the light strip 141 corresponds to the speed of the transmission shaft 122. Press the sensing part 112 to adjust the speed of the transmission shaft 122 within the speed range. The higher the speed of the transmission shaft 122, the longer the light-emitting length of the light strip 141. When the speed of the transmission shaft 122 reaches the highest position in the speed range, the light strip 141 can show the longest light-emitting length.

[0090] In other embodiments, the housing assembly 110 further includes a switch 113. The model identification of the functional head can be achieved by configuring the switch 113 to be rotatable to a plurality of first positions relative to the housing body 111 around the axis of the second port 1112. Thus, the step of adjusting the speed range of the transmission shaft 122 according to the model of the functional head includes:

[0091] The drive switch 113 is rotated to the first position corresponding to the functional head model.

[0092] Specifically, the multiple first positions can represent cutting, drilling, engraving, grinding and polishing modes respectively, and the staff can turn the switch 113 according to the type of operation actually required. Exemplarily, when the electric device needs to be used for cutting operations, the electric device is first controlled to be in a shutdown state (or the electric device is in a powered-on state, but the motor 121 is controlled to be in a stationary state), and the button 163 is pressed so that the stop pin 161 is inserted into the limit portion 1223 of the transmission shaft 122, thereby limiting the transmission shaft 122 from rotating. Connect one end of the cutting tool to the second end 1222 of the transmission shaft 122, and then cancel the pressure applied to the button 163, so that the stop pin 161 is disengaged from the limit portion 1223 of the transmission shaft 122. Turn on the electric device to turn it on, and turn the switch 113 to the first position representing the cutting mode, so that the controller 131 can obtain the model of the functional head according to the first position of the switch 113, thereby adjusting the speed range of the transmission shaft 122 to 0~n2rpm. At the same time, the controller 131 divides the speed range into multiple gears, and the speed of each gear can be distributed in an equidistant manner (the speed of each gear can also be distributed in an increasing form, that is, the speed difference between each gear can be different). In addition, the controller 131 adjusts the light-emitting parameters of the light-emitting component 140 according to the speed range (taking the light-emitting module including the light strip 141 as an example) so that the light-emitting length of the light strip 141 corresponds to the speed of the transmission shaft 122. Press the sensing part 112 to adjust the speed of the transmission shaft 122 within the speed range. The higher the speed of the transmission shaft 122, the longer the light-emitting length of the light strip 141. When the speed of the transmission shaft 122 reaches the highest position in the speed range, the light strip 141 can show the longest light-emitting length.

[0093] In some embodiments, the sensor 132 disposed inside the sensing portion 112 can also be used to control the power on or off of the electric device. Specifically, two sets of preset times can be set. For ease of expression, a first time and a second time are defined, and the first time is greater than the second time. When the time of continuous pressing on the sensing portion 112 is not less than the first time, the electric device is turned on or off. When the electric device is in the on state, if the time of continuous pressing on the sensing portion 112 is not less than the second time and less than the first time, the speed gear of the transmission shaft 122 is switched. If the time of continuous pressing on the sensing portion 112 is not less than the first time, the electric device is turned off.

[0094] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0095] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0096] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A drive module, characterized in that: include: A housing assembly, comprising a housing body and a sensing portion integrally connected to the housing body; A driving assembly connected to the housing assembly, the driving assembly comprising a motor and a transmission shaft, the motor and the transmission shaft being in driving connection; A control component is disposed in the housing component, the control component includes a controller and a sensor electrically connected to each other, the motor is electrically connected to the controller, the sensor is disposed on the inner side of the sensing part to receive the sensing signal generated by the sensing part, and the controller responds to the sensing signal and controls the motor according to the sensing signal.

2. The driving module according to claim 1, characterized in that: The driving module further includes a light emitting component, the light emitting component includes one or more light emitting elements, and the controller is electrically connected to the light emitting elements; The controller is configured to adjust the light emitting parameters of the light emitting element according to the rotation speed of the transmission shaft.

3. The driving module according to claim 2, characterized in that: When there is one light-emitting element, the light-emitting element is a light strip, and the light-emitting length of the light-emitting element corresponds to the rotation speed of the transmission shaft.

4. The driving module according to claim 1, characterized in that: The drive assembly also includes a battery; The drive assembly also includes a switch, and the switch can move to a first position or a second position relative to the housing assembly. When the switch moves to the first position, the battery is electrically connected to the controller and the motor is turned on. When the switch moves to the second position, the battery and the controller are electrically disconnected and the motor is turned off. During the movement of the switch from the first position to the second position, the rotation speed of the transmission shaft decreases.

5. The driving module according to claim 4, characterized in that: The switch is rotatably connected to the shell body and can be rotated from the first position to the second position relative to the shell body.

6. The driving module according to claim 4, characterized in that: The driving module also includes a charging component, which is arranged in the outer shell component. The charging component has a charging socket, which is opened in the shell body, and the charging socket is electrically connected to the battery through the controller.

7. The driving module according to claim 1, characterized in that: The driving module also includes a limit assembly, which has a first working state and a second working state. When the limit assembly is in the first working state, the transmission shaft rotates, and when the limit assembly is in the second working state, the transmission shaft stops rotating.

8. The driving module according to claim 7, characterized in that: The limit assembly includes a stop pin, a stop spring and a button, the stop pin is connected to the button through the stop spring, the button is movably connected to the shell body, the button is formed with an edge portion along its circumference, and the transmission shaft is provided with a limit portion. When the limit assembly is in a first state, the edge portion abuts against the shell body, and the stop pin is disengaged from the limit portion. When the limit assembly is in a second state, the edge portion is away from the shell body, and the stop pin is engaged with the limit portion.

9. The driving module according to claim 1, characterized in that: The sensing portion has an inner side and an outer side opposite to each other, and the sensing portion is recessed from the outer side toward the inner side.

10. The driving module according to claim 1, characterized in that: The sensor is a pressure sensor, and the pressure sensor contacts the sensing part to obtain the pressure applied to the sensing part; Alternatively, the sensor is a temperature sensor, and the temperature sensor contacts the sensing portion to obtain the temperature of the sensing portion.

11. An electric device, characterized in that: include: The drive module according to any one of claims 1 to 10; The functional module is detachably connected to the driving module, and the functional module includes a functional head, and the functional head is detachably connected to the transmission shaft of the driving module.

12. The electric device according to claim 11, characterized in that: The electric device further comprises a locking module, and the functional module is detachably connected to the driving module via the locking module.

13. The electric device according to claim 12, characterized in that: The locking module comprises a chuck and a chuck locking cap, the chuck locking cap is sleeved on the chuck, the chuck locking cap has a locking position and an unlocking position relative to the chuck, a locking hole is provided in the chuck locking cap, the locking hole is threadedly connected to the axial surface of the transmission shaft, the chuck comprises a clamping portion and a connecting portion, the transmission shaft is provided with an axial hole, the connecting portion is threadedly connected to the axial hole; The clamping part is provided with a gap. When the clamp lock cap is in the locking position, the gap is reduced and the clamping part clamps the functional head. When the clamp lock cap is in the unlocking position, the gap is opened and the clamping part releases the functional head.

14. The electric device according to claim 11, characterized in that: The electric device also includes an identification module, through which the functional module is electrically connected to the driving module. The identification module is used to detect a resistance signal of the functional module and transmit the resistance signal to the controller, and the controller controls the output speed of the motor according to the resistance signal.

15. The electric device according to claim 14, characterized in that: The identification module includes a conductive ring and at least two conductive contacts. The conductive ring is arranged at one end of the functional head close to the transmission shaft. The conductive contacts are arranged at intervals on the conductive ring. The conductive ring is electrically connected to the controller through the conductive contacts. The conductive ring is used to detect the resistance signal of the functional head, and the conductive contacts are used to transmit the resistance signal to the controller.

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