Handheld grinding tool

Abstract

The utility model discloses a handheld polishing tool which comprises a shell, a driving device and a bottom plate, a containing cavity is formed in the shell, the driving device is arranged in the containing cavity, the bottom plate is arranged at the bottom of the shell and connected with the driving device, the driving device comprises a motor serving as a power source, and a holding part used for being held by a hand is formed at the top of the shell. A control switch is arranged on the side face, used for grabbing, of the holding part, the control switch can control starting and stopping of the motor and / or the rotating speed of the motor, a lamplight assembly is arranged on the front end face of the holding part, the control switch is arranged on the side face, used for grabbing, of the holding part, the control switch is pressed through the thumb, and it is guaranteed that the pressing force is enough; when the whole palm is attached to the holding part for holding, the thumb can also exert force conveniently, the control switch is arranged on the side face of the holding part, so that the end face of the front end of the holding part has enough space for containing the lamplight assembly, and therefore the lamplight assembly achieves the better lighting effect, and working conditions are conveniently illuminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hand -held electric tool especially, relates to a hand -held polishing tool. BACKGROUND

[0002] The polishing tool is a commonly used electric tool, and polishing is realized on the surface of wood, plastic, stone, metal and other materials through the swing of the bottom plate. On the basis of meeting the polishing function, the hand -held polishing tool usually should also have smaller size and dead weight to meet the expectation of convenient operation of the user and use experience, and the existing hand -held polishing tool includes a hand -held sander, a hand -held grinding machine and a hand -held polisher.

[0003] The existing hand -held polishing tool such as the sander disclosed in Chinese patent CN116713867A includes a shell, forms an accommodating space, the shell forms a holding part for the user to hold;The bottom plate assembly includes a bottom plate;The output shaft drives the bottom plate assembly to rotate, and the motor includes a motor shaft extending along the second axis;The power supply operation key is located in front of the holding part of the sander, and the sander further includes a speed regulating switch, and the speed regulating switch is used to adjust the rotating speed of the bottom plate assembly during operation.

[0004] The power switch on the existing sander is arranged at the front end of the holding part and is pressed by the index finger or the middle finger, and the index finger or the middle finger needs to exert a large force for pressing, and when the hand is held in the holding part, the whole palm is attached to the holding part, so that the index finger or the middle finger is difficult to exert force, and the machine cannot be paused or started in time, causing inconvenience in use, and the switch arranged at the front part makes the front part of the holding part not have enough space to place the light assembly, and the light assembly needs to be arranged at other parts on the shell, so that a good lighting effect cannot be achieved. UTILITY MODEL CONTENTS

[0005] Based on the above-mentioned power switch arranged at the front end of the holding part, the index finger or the middle finger needs to exert a large force for pressing, and when the hand is held in the holding part, the whole palm is attached to the holding part, so that the index finger or the middle finger is difficult to exert force, and the machine cannot be paused or started in time, and the power switch arranged at the front end of the holding part makes the front end of the holding part not have enough space to place the light assembly, and a good lighting effect cannot be achieved. The utility model provides a hand -held polishing tool.

[0006] The utility model discloses a handheld polishing tool which comprises a shell, a driving device and a bottom plate, the shell is internally provided with a containing cavity, the driving device is arranged in the containing cavity, the bottom plate is arranged at the bottom of the shell, the bottom plate is connected with the driving device, the driving device comprises a motor as a power source, the top of the shell is formed with a holding part for hand gripping, a control switch is arranged on the side of the holding part for gripping, the control switch can control the start-stop of the motor and / or the rotating speed of the motor, and a light assembly is arranged on the front end surface of the holding part.

[0007] The utility model further preferably discloses a technical scheme that the control switch comprises a switch pressing plate pivotally connected to the shell, a spring is arranged between the switch pressing plate and the shell for resetting the switch pressing plate, a control circuit board and a Hall sensor are arranged on the shell, the Hall sensor is connected to the control circuit board, a magnet is arranged on the switch pressing plate and cooperates with the Hall sensor for sensing, the switch pressing plate is pressed to change the distance between the magnet and the Hall sensor, so that the control circuit board controls the start-stop and rotating speed of the motor.

[0008] The utility model further preferably discloses a technical scheme that a power supply joint part is arranged at the rear part of the holding part, and the power supply joint part is used for detachably mounting a battery pack to supply power to the motor.

[0009] The utility model further preferably discloses a technical scheme that the shell comprises a holding part, a containing part and a chip removal shell, the holding part is connected to the upper end of the containing part, the chip removal shell is connected to the lower end of the containing part, the driving device is at least partially arranged in the containing part, the bottom plate is arranged below the chip removal shell, an airflow cavity is formed in the chip removal shell, an outlet is arranged on the chip removal shell for discharging the airflow formed in the airflow cavity, a chip removal fan is connected to the driving device, and the chip removal fan is used for forming the airflow for chip removal in the airflow cavity.

[0010] The utility model further preferably discloses a technical scheme that the front end surface of the holding part is an arc surface, and the light assembly extends along the arc profile of the front end surface of the holding part.

[0011] The utility model further preferably discloses a technical scheme that the side surfaces of the left and right sides of the holding part for hand gripping are parallel planes.

[0012] The utility model further preferably discloses a technical scheme that the part, where the top surface of the holding part is adjacent to the rear end surface of the holding part, has an inclined surface inclined downward, the power supply joint part is connected to the rear end surface of the holding part and is inclined upward, and a V-shaped avoiding space is formed between the power supply joint part and the inclined surface.

[0013] Compared with the prior art, the control switch is arranged on the side surface of the holding part for gripping, the control switch is pressed by the thumb, the pressing force is guaranteed to be sufficient, when the whole palm is attached to the holding part for gripping, the thumb is also convenient to exert force, the control switch arranged on the side surface of the holding part makes the front end surface of the holding part have sufficient space for placing the light assembly, so that the light assembly achieves better lighting effect, and the working condition is conveniently illuminated. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be described in further detail below in combination with the drawings and preferred embodiments, but the person skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as limiting the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can contain exaggerated display, and the drawings are not necessarily drawn to scale.

[0015] Figure 1 Structure diagram of the patent Figure 1 ;

[0016] Figure 2 Structure diagram of the patent Figure 2 ;

[0017] Figure 3 Side view of the patent.

[0018] In the drawing: 1, shell; 2, holding part; 3, containing part; 4, chip removal shell; 5, bottom plate; 6, power supply combination part; 7, switch pressing plate; 8, light assembly; 9, avoiding space; 10, plug-in slot; 11, guide convex rib; 12, clamping groove; 13, outlet; 14, inclined surface. DETAILED DESCRIPTION

[0019] The preferred embodiments of the utility model will be described in detail below with reference to the drawings. The person skilled in the art will appreciate that these descriptions are only descriptive, exemplary, and should not be interpreted as limiting the protection scope of the utility model.

[0020] It should be noted that: similar reference numerals represent similar items in the following drawings, therefore, once an item is defined in one drawing, it can not be further defined and explained in the subsequent drawings.

[0021] Figures 1-3As shown, the handheld polishing tool comprises a housing 1, a driving device and a bottom plate 5, the housing 1 is internally provided with a receiving cavity, the driving device is arranged in the receiving cavity, the bottom plate 5 is arranged at the bottom of the housing 1, the bottom plate 5 is connected with the driving device, the driving device drives the bottom plate 5 to move for polishing, the driving device comprises a motor as a power source, the motor can directly drive the bottom plate 5 to move, or the motor drives the bottom plate 5 to move after transmitting power through a transmission mechanism. Preferably, the driving device drives the bottom plate 5 to perform eccentric movement. The structure of the driving bottom plate 5 moving for polishing is the same as that of the existing polishing tool, and the present patent will not be described in detail.

[0022] Figure 1 As shown, the top of the housing 1 is formed with a holding part 2 for hand gripping, the holding part 2 is provided with a control switch on the side for gripping, the control switch can control the start and stop of the motor and / or the rotating speed of the motor, and the front end surface of the holding part 2 is provided with a light assembly 8.

[0023] The control switch of the present patent is arranged on the side of the holding part 2 for gripping, the control switch is pressed by the thumb, and the pressing force is sufficient, when the whole palm is attached to the holding part 2 for gripping, the thumb is also convenient to exert force, the control switch arranged on the side of the holding part 2 makes the front end surface of the holding part 2 have enough space to place the light assembly 8, so that the light assembly 8 achieves better lighting effect, which is convenient to illuminate the working condition.

[0024] Preferably, the control switch comprises a switch pressing plate 7 pivotally connected to the housing 1, a spring is arranged between the switch pressing plate 7 and the housing 1 for resetting the switch pressing plate 7, a control circuit board and a Hall sensor are arranged on the housing 1, the Hall sensor is connected with the control circuit board, a magnet is arranged on the switch pressing plate 7 and inductively matched with the Hall sensor, the motor is electrically connected with the control circuit board and controlled by the control circuit board, pressing the switch pressing plate 7 changes the distance between the magnet and the Hall sensor, so that the control circuit board controls the start and stop of the motor and the rotating speed.

[0025] Specifically, when the switch pressure plate 7 is in the initial position, the Hall sensor is out of the magnetic field of the magnet, at this time the Hall sensor does not sense the magnet, the machine is in the stop state, when the switch pressure plate 7 is pressed down, the switch pressure plate 7 rotates with the magnet to the side with the Hall sensor, so that the magnet gradually approaches the Hall sensor, when the Hall sensor enters the magnetic field of the magnet and senses the magnet, the Hall sensor generates a voltage signal, the control circuit board collects the voltage signal of the Hall sensor, and controls the machine to start, with the depth of the switch pressure plate 7, the distance between the magnet and the Hall sensor gradually decreases, the voltage signal generated by the Hall sensor changes with the change of the distance, the control circuit board controls the motor speed to increase according to the change of the voltage signal, when the switch pressure plate 7 is released, the switch pressure plate 7 is pushed back to the initial position by the spring, so that the magnet moves out of the sensing range of the Hall sensor, and the control circuit board controls the machine to stop. It can also be set that the Hall sensor is always in the magnetic field of the magnet, the magnet changes the distance between the magnet and the Hall sensor with the rotation of the switch pressure plate 7, the voltage signal generated by the Hall sensor changes with the change of the distance, the control circuit board collects the voltage signal and controls the motor to start and stop and the speed according to the voltage signal, such as when the switch pressure plate 7 is pressed down, the control circuit board controls the motor to start first, and then increases the speed of the motor with the depth of the switch pressure plate 7, when the switch pressure plate 7 is lifted, the control circuit board reduces the speed of the motor with the gradual lifting of the switch pressure plate 7, until the switch pressure plate 7 is lifted to the initial position, and the control circuit board controls the motor to stop. It can also be set that the trigger angle is pressed down, such as when the switch pressure plate 7 is pressed down by more than 10°, the control circuit board controls the motor to start, preventing the machine from starting due to accidental touch of the switch pressure plate 7.

[0026] Preferably, the sides of the holding part 2 on both sides for hand gripping are parallel planes, which are conducive to the arrangement of the switch pressure plate 7, and when the palm is gripped, the two parallel planes facilitate the palm to exert force, so that the palm can better hold the holding part 2.

[0027] Figure 3 As described, the shell 1 includes a holding part 2, a receiving part 3 and a chip removal shell 4, the holding part 2 is connected to the upper end of the receiving part 3, the chip removal shell 4 is connected to the lower end of the receiving part 3, the driving device is at least partially arranged in the receiving part 3, the bottom plate 5 is arranged below the chip removal shell 4, the chip removal shell 4 forms an airflow cavity, the chip removal shell 4 is provided with an outlet 13 for the airflow formed in the airflow cavity to flow out, and the driving device is connected with a chip removal fan, which is used to form the airflow for chip removal in the airflow cavity. When the machine starts to polish, the driving device drives the chip removal fan to rotate, so that the airflow formed in the airflow cavity sends the chippings polished down out of the outlet 13.

[0028] The front part of the holding part 2 protrudes from the receiving part 3, so that the illumination range of the illumination light of the light assembly 8 in the front part is wider and is not easily blocked by other parts of the shell 1.

[0029] The front end surface of the holding part 2 is arc-shaped, and the light assembly 8 is arranged along the arc-shaped contour of the front end surface of the holding part 2, so that the light emitted by the light assembly 8 can be more dispersed, the illumination range of the light assembly 8 is improved, and thus the working condition can be illuminated conveniently.

[0030] Figure 2 As shown, the rear part of the holding part 2 is provided with a power supply joint part 6, the power supply joint part 6 is used for detachable mounting of a battery pack to supply power to the motor, the power supply joint part includes a battery pack mounting shell, the battery pack mounting shell is provided with a plug-in slot 10 for sliding plug-in of the battery pack, the plug-in slot 10 is provided with an electric terminal, a guide rib 11 for guiding the inserted battery pack, and a clamping groove 12 matched with a battery pack lock buckle, the electric terminal is electrically connected with the control circuit board, and the connected battery pack supplies power to the motor through the electric terminal.

[0031] The top surface of the holding part 2 and the part adjacent to the rear end surface of the holding part 2 have a downwardly inclined inclined surface 14, the power supply joint part 6 is connected to the rear end surface of the holding part 2 and is inclined upward, a V-shaped avoiding space 9 is formed between the power supply joint part 6 and the inclined surface 14, when the palm is attached to the holding part 2 for gripping, the avoiding space 9 can be used for placing the rear part of the palm, the palm is convenient to grip, the rear side is not easy to press against the palm, and the comfort of holding is improved.

[0032] The hand-held polishing tool provided by the present application is introduced above, the principle and implementation mode of the present application are described by applying specific examples in the present article, and the above embodiment description is only used for helping to understand the present application and the core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A hand-held polishing tool comprising a housing, a driving device and a bottom plate, the housing is provided with a receiving cavity, the driving device is arranged in the receiving cavity, the bottom plate is arranged at the bottom of the housing, the bottom plate is connected with the driving device, the driving device comprises a motor as a power source, characterized in that, The top of the shell is formed with a holding part for hand gripping, the side of the holding part for gripping is provided with a control switch, the control switch can control the start and stop of the motor and / or the rotating speed of the motor, and the front end face of the holding part is provided with a light assembly.

2. The hand-held sanding tool of claim 1, wherein, The control switch comprises a switch pressing plate pivotally connected to the shell, a spring is arranged between the switch pressing plate and the shell for resetting the switch pressing plate, the shell is provided with a control circuit board and a Hall sensor, the Hall sensor is connected to the control circuit board, a magnet is arranged on the switch pressing plate and inductively matched with the Hall sensor, pressing the switch pressing plate changes the distance between the magnet and the Hall sensor, so that the control circuit board controls the start and stop of the motor and the rotating speed.

3. The hand-held sanding tool of claim 1, wherein, The rear part of the holding part is provided with a power supply combining part, the power supply combining part is used for detachably mounting a battery pack to supply power to the motor.

4. The hand-held sanding tool of claim 1, wherein, The shell comprises a holding part, a containing part and a chip removal shell, the holding part is connected to the upper end of the containing part, the chip removal shell is connected to the lower end of the containing part, the driving device is at least partially arranged in the containing part, the bottom plate is arranged below the chip removal shell, the airflow cavity is formed in the chip removal shell, the outlet is arranged on the chip removal shell for the airflow formed in the airflow cavity to be discharged, the chip removal fan is connected to the driving device, the chip removal fan is used for the airflow formed in the airflow cavity to remove chips, and the front part of the holding part protrudes from the containing part.

5. A hand-held sanding tool according to claim 1 or 4, characterized in that The front end face of the holding part is an arc face, and the light assembly is arranged along the arc contour of the front end face of the holding part.

6. The hand-held sanding tool of claim 1 or 2, wherein, The side of the holding part for hand gripping is a parallel plane.

7. The hand-held sanding tool of claim 3, wherein, The part of the top face of the holding part adjacent to the rear end face of the holding part has a downward inclined inclined surface, the power supply combining part is connected to the rear end face of the holding part and is obliquely upwardly raised, and the power supply combining part and the inclined surface form a V-shaped avoiding space.

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