Nail grinding pen and nail grinding host machine

Abstract

The present invention discloses a nail grinding pen, which comprises a pen barrel, a motor, and an inner body. The inner side of the pen barrel has a receiving space, and an opening connected to the receiving space provided on one side of the pen barrel. The motor is arranged in the receiving space, and driven by electric power to rotate the rotating shaft. The inner body is connected to the rotating shaft, and one end of the inner body facing the opening has a gripper for fixing a grinding head, so that the motor is able to drive the grinding head into rotation by rotating the gripper.

What is claimed is: 
     
         1 . A nail grinding pen ( 100 ), comprising:
 a nail grinding pen barrel ( 10 ), wherein the nail grinding pen barrel ( 10 ) has a receiving space (SP) therein, and the nail grinding pen barrel ( 10 ) has an end with an opening (OP) in communication with the receiving space (SP);   a motor ( 20 ) provided in the receiving space (SP) and having a rotating shall ( 21 ) to be driven to rotate by electricity; and   an inner body ( 30 ) connected to the rotating shaft ( 21 ), wherein the inner body ( 30 ) has an end facing the opening (OP) and provided with a gripper ( 31 ), and the gripper ( 31 ) is configured to secure a grinding head (GM) so that the motor ( 20 ) is able to drive the grinding head (GH) into rotation by rotating the gripper ( 31 ).   
     
     
         2 . The nail grinding pen ( 100 ) of  claim 1 , wherein the nail grinding pen barrel ( 10 ) is provided with a rotary switch ( 11 B) coupled to the gripper ( 31 ), and the rotary switch ( 11 B) is configured to be rotated in order to switch the gripper ( 31 ) between an opened state and a closed state, the gripper ( 31 ) is restricted between a front position and a rear position and is movable forward and rearward in order to he switched between the opened state and the closed state. 
     
     
         3 . The nail grinding pen ( 100 ) of  claim 1 , wherein the nail grinding pen barrel ( 10 ) is provided with a rotary switch ( 11 B) coupled to the gripper ( 31 ), and the rotary switch ( 11 B) is configured to be rotated in order to switch the gripper ( 31 ) between an opened state and a closed state, and the inner body ( 30 ) comprises: a pushing post ( 32 ); the gripper ( 31 ), which is provided at a front end of the pushing post ( 32 ); a position-limiting barrel ( 33 ) surrounding the gripper ( 31 ); and a shaft sleeve ( 34 ) provided at a rear end of the pushing post ( 32 ) and attached to the rotating shaft ( 21 ) so that the motor ( 20 ) is able to drive the pushing post ( 32 ) and the gripper ( 31 ) into rotation, 
     
     
         4 . The nail grinding pen ( 100 ) of  claim 3 , wherein the gripper ( 31 ) comprises: a sleeve ( 311 ) connected to the pushing post ( 32 ); an accommodating groove ( 312 ) provided at an end of the sleeve ( 311 ), facing the opening (OP), and configured to accommodate the grinding head (GH); and a plurality of claw units ( 313 ) provided along a periphery of the accommodating groove ( 312 ); wherein there is a gap (SG) between each two adjacent said claw units ( 313 ) so that the claw units ( 313 ) are able to constrict radially to grip the grinding head (GH) or are able to expand radially to release the grinding head (GH), and the gripper ( 31 ) comprises three said claw units ( 313 ). 
     
     
         5 . The nail grinding pen ( 100 ) of  claim 4 , wherein there is a gap smaller than 0.7 mm between each two adjacent said claw units ( 313 ) when the claw units ( 313 ) are closed, and the accommodating groove ( 312 ) has a depth ranging from 20 mm to 38 mm. 
     
     
         6 . The nail grinding pen ( 100 ) of  claim 4 , wherein the rotary switch ( 11 B) comprises: a rotating ring ( 111 B); a position-limiting track ( 112 B) disposed on the nail grinding pen barrel ( 10 ) and surrounded by the rotating ring ( 111 B), a connecting ring ( 113 B) provided on an inner side of the position-limiting track ( 112 B); and a rolling ball ( 114 B) provided on the connecting ring ( 113 B) and confined in the position-limiting track ( 112 B), wherein the connecting ring ( 113 B) has an outer periphery provided with an annular track (Ar) for interfering with the rolling ball ( 114 B), and by rotating the rotating ring ( 111 B), the rolling ball ( 114 B) is movable in and along the position-limiting track ( 112 B) between a first axial position and a second axial position such that the connecting ring ( 113 B) is moved in an axial direction due to interference and limitation by the position-limiting track ( 1128 ) and thereby pushes the gripper ( 31 ) forward or rearward, the rolling ball ( 114 B) is able to be locked at a first end (P 1 ) or a second end (P 2 ) of the position-limiting track ( 112 B), and a. spring ( 115 B) is provided on a side of the connecting ring ( 113 B) to apply an elastic force to the connecting ring ( 113 B) in the axial direction, thereby applying an auxiliary force to the connecting ring ( 113 B) to secure the rolling ball ( 114 B) in a first position-limiting groove (P 11 ) at the first end (P 1 ) of the position-limiting track ( 112 B), the rotating ring ( 111 B) has an inner side provided with a confining track (LT), and the confining track (LT) extends in the axial direction. 
     
     
         7 . The nail grinding pen ( 100 ) of  claim 6 , wherein the gripper ( 31 ) comprises a constricting unit ( 314 ), and the constricting unit ( 314 ) is provided inside the position-limiting barrel ( 33 ), is mounted around the sleeve ( 311 ), and constricts the claw units ( 313 ) in normal circumstances; and wherein the position-limiting barrel ( 33 ) has an inner side provided with an inner wall ( 332 ) facing an end of the constricting unit ( 314 ), and the pushing post ( 32 ) is provided with a front wall ( 321 ) facing an opposite end of the constricting unit ( 314 ) so that when the connecting ring ( 113 B) pushes the gripper ( 31 ) via the pushing post ( 32 ), the constricting unit ( 314 ) is compressed in two opposing directions and therefore expands radially to reduce a constricting force of the claw units ( 313 ), thereby allowing replacement of the grinding head (GH). 
     
     
         8 . The nail grinding pen ( 100 ) of  claim 3 , wherein a bearing ( 35 A) is provided between an end of the position-limiting barrel ( 33 ) and a wall of the receiving space (SP), and another bearing ( 35 B) is provided between an opposite end of the position-limiting barrel ( 33 ) and the wall of the receiving space (SP). 
     
     
         9 . The nail grinding pen ( 100 ) of  claim 1 , wherein the rotating shaft ( 21 ) has a circular, cross-shaped, D-shaped, or polygonal cross section, or an additional sleeve ( 211 ) is attached to the rotating shaft ( 21 ), and/or the rotating shaft ( 21 ) protrudes from the motor housing ( 22 ) by a length less than 15 mm, the motor ( 20 ) is a brushless motor or a brushed motor, and/or the motor ( 20 ) has electrical connection ports configured as a plurality of electrical sockets, a plurality of terminals, or a plurality of soldered wires. 
     
     
         10 . The nail grinding pen ( 100 ) of  claim 9 , wherein a rear side of the nail grinding pen barrel ( 10 ) is provided with an electrical wire having a protective sleeve ( 121 ) which is configured to prevent a power cord passing through the protective sleeve ( 121 ) from damage by being bent. 
     
     
         11 . The nail grinding pen ( 100 ) of  claim 9 , wherein the motor ( 20 ) has electrical connection ports configured as a plurality of soldered wires, the rear cover ( 12 ) has an inner side provided with a pliable wire-surrounding member ( 122 ) for enclosing the soldered wires, and once the rear cover ( 12 ) is locked to the nail grinding pen barrel ( 10 ), the rear cover ( 12 ) and the motor ( 20 ) press tightly on the pliable wire-surrounding member ( 122 ) from two opposite sides thereof to secure and seal the pliable wire-surrounding member ( 122 ); or wherein the electrical connection ports of the motor ( 20 ) are configured as a plurality of electrical sockets or a plurality of terminals, a power cord is inserted into the rear cover ( 12 ) from an outer side thereof and then soldered to electrical ports inside a pliable terminal-surrounding member ( 122 ), the electrical ports and the electrical sockets or the terminals are electrically connected through the pliable terminal-surrounding member ( 122 ), and once the rear cover ( 12 ) is locked to the nail grinding pen barrel ( 10 ), the rear cover ( 12 ) and the motor ( 20 ) press on the pliable terminal-surrounding member ( 122 ) from two opposite sides thereof to secure and seal the pliable terminal-surrounding member ( 122 ); or
 the nail grinding pen barrel ( 10 ) has a rear end with a rear opening ( 15 ), the rear opening ( 15 ) is provided with a position-limiting portion ( 151 ), and the position-limiting portion ( 151 ) is located on an outer side of a pliable wire-surrounding member ( 16 ) with respect to the rear opening ( 15 ) so as to prevent the pliable wire-surrounding member ( 16 ) from leaving the rear opening ( 15 ) from inside the receiving space (SP), wherein the pliable wire-surrounding member ( 16 ) closes the receiving space (SP) by closing the rear opening ( 15 ).   
     
     
         12 . The nail grinding pen ( 100 ) of  claim 1 , wherein the nail grinding pen barrel ( 10 ) is provided with a grip portion ( 13 ), and the grip portion ( 13 ) is provided with a cool-feeling material, and/or the nail grinding pen barrel ( 10 ) is provided with a grip portion ( 13 ), and the grip portion ( 13 ) is provided with a cushioning material corresponding to an inner side or an outer side of the nail grinding pen barrel ( 10 ). 
     
     
         13 . The nail grinding pen ( 100 ) of  claim 1 , wherein the nail grinding pen barrel ( 10 ) is made of an acetone-resistant material or has a coating, or has a surface comprising a polyurethane (PU) paint layer, a UV-resistant paint layer, a metal coating layer, or a layer formed by water electroplating, 
     
     
         14 . The nail grinding pen ( 100 ) of  claim 1 , wherein the nail grinding pen barrel ( 10 ) is provided with an auxiliary light ( 17 ), and the auxiliary light ( 17 ) is a LED, an annular light, a homogeneous light, or an optical fiber. 
     
     
         15 . A nail grinding host machine ( 200 ), connected to the nail grinding pen ( 100 ) in  claim 1  to control operating mode of the motor ( 20 ) in the nail grinding pen ( 100 ), the nail grinding host machine ( 200 ) comprising:
 a host machine body ( 40 ), wherein the host machine body ( 40 ) is provided with at least one man-machine interface ( 41 ); and 
 a main board ( 50 ) provided in the host machine body ( 40 ) and connected to the man-machine interface ( 41 ) in order to receive instructions from and send instructions to the man-machine interface ( 41 ), wherein the main board ( 50 ) comprises a power module ( 51 ) and at least one driver ( 52 ), and the main board ( 50 ) is connected through wires, or is coupled, to the motor ( 20 ) of the nail grinding pen ( 100 ) in order to transmit control instructions and driving power to the motor ( 20 ). 
 
     
     
         16 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the man-machine interface ( 41 ) comprises a rotating knob, a pushbutton, a liquid crystal display screen, a touchpad, a touch-controlled button, a touch screen, LED, LED display, slide switch, rocker switch, or a combination of the above, and/or the man-machine interface ( 41 ) comprises a motor speed regulator ( 411 ), the motor speed regulator ( 411 ) comprises a varistor or an encoder, which is used by the driver ( 52 ) to control the rotation speed of the motor ( 20 ) accordingly. 
     
     
         17 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the host machine body ( 40 ) is provided with a receiving mechanism ( 42 ) for receiving the grinding head (GH), wherein the receiving mechanism ( 42 ) comprises a receiving box ( 42 A), a plurality of receiving blocks ( 42 B), or a receiving groove ( 42 C), and/or the receiving mechanism ( 42 ) is provided with one or a plurality of magnetic units ( 421 ) for magnetically attracting and thereby retaining the grinding head (GH), and/or the receiving mechanism ( 42 ) is provided with one or a plurality of engaging units ( 422 ) for securing the grinding head (GH). 
     
     
         18 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the main board ( 50 ) comprises a replaceable battery connected to the power module ( 51 ); or
 the main board ( 50 ) comprises a rechargeable battery connected to the power module ( 51 ); or   the power module ( 51 ) supports a rapid-charging function, wherein the charging speed ranges from 0.3 c to 1 c.   
     
     
         19 . The nail grinding host machine ( 200 ) of  claim 18 , wherein the power module ( 51 ) comprises a USB Type-C socket located on the host machine body ( 40 ). 
     
     
         20 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the main board ( 50 ) comprises a rotation speed detector ( 53 ) for detecting a rotation speed of the motor ( 20 ) and providing feedback to the driver ( 52 ) in order to modify an output of the driver ( 52 ). 
     
     
         21 . The nail grinding host machine ( 200 ) of  claim 20 , wherein the main board ( 50 ) detects the rotation speed of the motor ( 20 ) via the rotation speed detector ( 53 ) and, upon detecting that the rotation speed of the motor ( 20 ) is reduced, increases an output of the motor ( 20 ) to compensate for the reduced rotation speed. 
     
     
         22 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the main board ( 50 ) stops the motor ( 20 ) upon detecting that a pause instruction is triggered via the man-machine interface ( 41 ). 
     
     
         23 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the main board ( 50 ) stops the motor ( 20 ) when a pause instruction is triggered by a degree of inclination of the nail grinding pen ( 100 ) as is detected by an inclinometer of the nail grinding pen ( 100 ), and/or the main board ( 50 ) stops the motor ( 20 ) when a pause instruction is triggered by a motion sensor of the nail grinding pen ( 100 ) detecting that the nail grinding pen ( 100 ) has been still for a predetermined amount of time, and/or the main board ( 50 ) or the main board ( 50 ) comprises a timer for triggering a shut-down instruction when the nail grinding pen ( 100 ) has been still for a predetermined amount of time. 
     
     
         24 . The nail grinding host machine ( 200 ) of  claim 15 , wherein the main board ( 50 ) controls power of the motor ( 20 ) at a stable wattage lower than 13 W when the motor ( 20 ) is idling. 
     
     
         25 . A nail grinding host machine ( 300 ), connected to the nail grinding pen ( 100 ) in  claim 1  to control operating mode of the motor ( 20 ) in the nail grinding pen ( 100 ), the nail grinding host machine ( 300 ) comprising:
 a host machine body ( 40 ), wherein the host machine body ( 40 ) is provided with at least one man-machine interface ( 41 ); and 
 a main hoard ( 50 ) provided in the host machine body ( 40 ) and connected to the man-machine interface ( 41 ) in order to receive instructions from and send instructions to the man-machine interface ( 41 ), wherein the main hoard ( 50 ) comprises a power module ( 51 ), the main board ( 50 ) is connected through wires, or is coupled, to the motor ( 20 ) of the nail grinding pen ( 100 ) in order to transmit control instructions and driving power to the motor ( 20 ); 
 wherein the motor ( 20 ) is a brushed motor, the man-machine interface ( 41 ) is connected to a driver ( 54 ) connected to the brushed motor ; and the driver ( 54 ) provides a voltage output for the brushed motor; 
 wherein the driver ( 54 ) comprises a converter, a switch, a metal-oxide-semiconductor (MOS) device, or a relay.