Electric tool

Abstract

The utility model relates to an electric tool which comprises a machine shell, a motor assembly installed in the machine shell, an output end driven by the motor assembly and a switch assembly controlling the motor assembly to be started and stopped. The electric fan is characterized in that the switch assembly comprises a switch element electrically connected to the motor assembly, a switch trigger for triggering the switch element and an anti-self-locking switch installed on the switch trigger, at least part of the switch trigger is exposed out of the machine shell so that a user can operate the switch trigger, the switch trigger is a long-rod type trigger, and the anti-self-locking switch is installed on the switch trigger. An end portion of the switch trigger is pivotally mounted to the housing, and the anti-self-locking switch is located on an opposite side of the end portion of the switch trigger. The electric tool provided by the utility model is beneficial to improving the experience feeling and the comfort degree of a user for operating the tool.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric tools, especially to an electric tool used in decoration, building and the like.

BACKGROUND

[0002] The electric tool usually comprises a casing, a motor located in the casing, a main control switch accommodated in the casing and controlling the start and stop of the motor, and an end accessory driven by the motor, wherein the casing comprises a holding portion, and an operation switch for activating the main control switch is installed on the holding portion, so that when a user holds the holding portion, the user's fingers can reach the operation switch, facilitating the control of the electric tool. For safety, the electric tool usually further comprises a switch locking device, which can be designed to have a single self-locking function or a reverse self-locking function, or both. The switch locking device with the self-locking function can lock the operation switch at the open position, i.e. when the user presses the operation switch, the user can press the knob of the switch locking device to keep the operation switch at the open position. The switch locking device with the reverse self-locking function can lock the operation switch at the closed position, i.e. the operation switch can be pressed only when the knob of the switch locking device is pressed, effectively avoiding unintended injury caused by the user pressing the operation switch by mistake.

[0003] In the electric tool with the single reverse self-locking function, the operation switch is usually provided as a trigger, and the knob is pivotally connected to the trigger by a pin shaft. By adjusting the rotation angle of the knob, the stroke of the trigger can be changed, thereby realizing the acceleration operation of the main control switch from low speed to high speed. In addition, in order to prevent dust from falling into the machine from the opening of the trigger mounting knob, the casing is usually provided with a blocking rib.

[0004] However, when the user rotates the knob and presses the trigger at the same time, the knob is prone to fall into the narrow space formed between the blocking ribs, and the knob cannot be fully rotated to the bottom due to the blocking effect of the blocking ribs, so that the trigger cannot reach the maximum stroke, and the main control switch cannot be fully opened, and the motor cannot operate at the maximum speed. In this case, the user must first release part of the trigger stroke, and then adjust the knob to a larger rotation angle, so as to press the trigger to the maximum stroke. Such operation makes the user need to operate the knob and the trigger twice to fully open the machine, which cannot provide the user with a better experience.

[0005] Therefore, it is necessary to provide an improved electric tool to overcome the defects in the prior art.

UTILITARY MODEL CONTENT

[0006] The utility model discloses an electric tool which is ergonomic to improve or enhance the experience and comfort of the user operating the tool.

[0007] The utility model discloses an electric tool which is ergonomic to improve or enhance the experience and comfort of the user operating the tool.

[0008] Further improvement is that the electric tool includes a combination part matched with the reverse self-locking switch, the combination part includes a combination surface in contact with the reverse self-locking switch, the reverse self-locking switch includes a pivot shaft, a connecting arm extending from the pivot shaft towards the combination part, and the connecting arm is arranged obliquely relative to the combination surface.

[0009] Further improvement is that the reverse self-locking switch has a first position limiting the movement of the switch trigger relative to the switch element and a second position not limiting the movement of the switch trigger relative to the switch element, and in the first position, the end of the reverse self-locking switch abuts against the combination surface.

[0010] Further improvement is that the reverse self-locking switch includes a manipulation part extending from the pivot shaft away from the combination part, and the connecting arm contacts the combination surface.

[0011] Further improvement is that the connecting arm includes a connecting point in contact with the combination surface, and from the first position to the second position, the angle formed by the connecting point and the center of the pivot shaft and the combination surface is between 75 degrees and 90 degrees.

[0012] Further improvement is that the switch trigger includes a rotating shaft connected to the machine shell and pivoted relative to the machine shell, and a trigger body extending from the rotating shaft, and the reverse self-locking switch is arranged on the side of the trigger body away from the rotating shaft.

[0013] Further improvement is that the trigger body is provided with an opening, the reverse self-locking switch is at least partially accommodated in the opening and moves in the opening, and the rotating shaft is installed in the opening.

[0014] Further improvement scheme is that the shell has opposite first end and second end, the output end is located at the first end, the rotating shaft is close to the first end of the shell, or the rotating shaft is close to the second end of the shell.

[0015] Further improvement scheme is that the switch trigger includes a buckle part extending from the end of the trigger body away from the rotating shaft, and the buckle part abuts against the shell.

[0016] Further improvement scheme is that the shell includes a buckle arm matched with the buckle part and a dustproof part connected between the combination part and the buckle arm, at least part of the combination part extends between the anti-self-locking switch and the buckle part, and the dustproof part is formed with a space for the buckle part to move.

[0017] Compared with the prior art, the electric tool has the following beneficial effects: the electric tool includes a combination part matched with the anti-self-locking switch, the combination part includes a combination surface in contact with the anti-self-locking switch, and the anti-self-locking switch is slidably arranged along the combination surface, so that the switch plate can be directly pressed from the closed position to the bottom, thereby avoiding the anti-self-locking switch from hindering the trigger stroke, causing the switch trigger to be insufficiently pressed, and requiring the user to operate twice to completely open the trigger, improving the operation experience and comfort of the tool; the opening for accommodating the anti-self-locking switch is arranged on the switch trigger, and the combination part and the shell are integrally formed, so that the tool anti-self-locking function is realized without increasing the volume of the tool, which is beneficial to the compactness of the tool; the shell includes a buckle arm matched with the buckle part and a dustproof part connected between the combination part and the buckle arm, so that the probability of external dust entering the inside of the tool can be effectively reduced, thereby prolonging the service life of the tool. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the whole electric tool of the preferred embodiment of the utility model;

[0019] Figure 2 is Figure 1 is an exploded schematic diagram of the electric tool shown in the figure;

[0020] Figure 3 is Figure 1 is a schematic diagram of the internal structure of the electric tool shown in the figure;

[0021] Figure 4 is Figure 1 is a sectional schematic diagram of the electric tool shown in the figure;

[0022] Figure 5 is Figure 2 is an enlarged view of circle D shown in the figure;

[0023] Figure 6 is Figure 1A schematic view of the electric tool with the battery pack shown is placed on a flat surface;

[0024] Figure 7 is Figure 6 A schematic view of the electric tool with the reverse self-locking switch unlocked is shown;

[0025] Figure 8 is Figure 7 A schematic view of the electric tool with the reverse self-locking switch unlocked is shown;

[0026] Figure 9 is Figure 6 A schematic view of the electric tool with the reverse self-locking switch unlocked is shown;

[0027] Figure 10 is another schematic view of the electric tool with the reverse self-locking switch unlocked;

[0028] Figure 11 is Figure 9 A schematic view of the electric tool with the reverse self-locking switch unlocked is shown;

[0029] Figure 12 is Figure 6 A schematic view of the electric tool with the reverse self-locking switch unlocked is shown.

CONCRETE EMBODIMENT

[0030] The utility model will be further described in detail below in combination with the drawings and embodiments.

[0031] The terms used in the utility model are merely for the purpose of describing specific embodiments, and are not intended to limit the utility model. For example, the words indicating the orientation or position relationship such as "upper", "lower", "front", "rear", "left", "right" and the like described below are merely based on the orientation or position relationship shown in the drawings, and are merely for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the devices / components must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] Please refer to Figures 1 to 4The embodiment of the utility model relates to a kind of electric tools 100, especially a kind of sander, and the sander is suitable for the work such as polishing, grinding on workpiece surface.In the present embodiment, electric tool 100 is powered by battery pack 200, and battery pack 200 is detachably mounted to electric tool 100.Electric tool 100 includes housing 1, motor assembly 2 mounted in housing 1, transmission assembly 3 connected to the front end of motor assembly 2, output end 4 connected to transmission assembly 3, switch assembly 5 for controlling the start-stop of motor assembly 2 and controller assembly 6 connected to switch assembly 5.User starts motor assembly 2 to rotate by triggering switch assembly 5, and motor assembly 2 drives output end 4 to rotate through transmission assembly 3.Further, housing 1 includes opposite first end and second end, output end 4 is located at the first end, and battery pack 200 is located at the second end.Output end 4 is a chuck assembly, and accessory (not shown) can be installed to the chuck assembly to perform work.

[0033] In the present embodiment, transmission assembly 3 has planetary gear reduction mechanism 31, and transmission assembly 3 is configured to convert the high-speed low-torque force of motor assembly 2 into low-speed high-torque force to meet the work requirements of users.

[0034] In the present embodiment, housing 1 includes first housing 11 accommodating motor assembly 2, second housing 12 accommodating transmission assembly 3 and mounting seat 13 for mounting battery pack 200.Second housing 12 and mounting seat 13 are located on the front and rear sides of first housing 11 respectively, i.e., first housing 11 is close to the first end of housing 1, and mounting seat 13 is close to the second end of housing 1.Further, housing 1 as a whole extends along the front-rear direction, and output end 4, transmission assembly 3 and motor assembly 2 are arranged in sequence along the front-rear direction in housing 1.Further, second housing 12 is arranged at the front, and output end 4 extends beyond the end of second housing 12.First housing 11 is arranged at the middle, and first housing 11 is formed with handle portion 14 for user to hold.Mounting seat 13 is arranged at the rear, and mounting seat 13 is arranged obliquely relative to the extension direction of second housing 12 and protrudes along the up-down direction perpendicular to the front-rear direction.

[0035] Please refer to Figure 3 and Figure 4As shown, the mounting seat 13 has a plug-in groove 131 for plugging the battery pack 200 and an inclined surface 132 extending from the rear end of the first housing 11 relative to the axis A of the motor assembly 2, the plug-in groove 131 and the inclined surface 132 are located on opposite sides of the mounting seat 13, the included angle B formed between the plug-in groove 131 and the axis A of the motor assembly 2 is less than 90 degrees, so that when the battery pack 200 is installed on the power tool 100, the battery pack 200 is arranged obliquely relative to the axis A of the motor assembly 2, and the height occupied by the battery pack 200 in the up-down direction is reduced. Therefore, when the user operates the power tool 100, the battery pack 200 is not easy to interfere with the user's arm, greatly improving the user's experience and comfort; and the end surface of the mounting seat 13 close to the handle portion 14 is provided as an inclined surface 132, and the inclined surface 132 and the first housing 11 are connected by a circular arc, so that the height occupied by the mounting seat 13 in the up-down direction is reduced, and the mounting seat 13 is not easy to interfere with the user's arm, the user is more comfortable, and it is more in line with ergonomics.

[0036] Preferably, the included angle B formed between the plug-in groove 131 and the axis A of the motor assembly 2 is 50 degrees to 70 degrees, and the height occupied by the battery pack 200 in the up-down direction is further reduced; in extreme or narrow working environment, the battery pack 200 will not interfere with the user, the use scenario of the power tool 100 is further expanded, and the adaptability and operability are improved.

[0037] Preferably, the included angle B formed between the plug-in groove 131 and the axis A of the motor assembly 2 is 60 degrees, so that the overall center of gravity of the power tool 100 and the battery pack 200 is located in the holding area when the user operates, the comfort is high, it is beneficial for long-time operation, reduces the user's fatigue, and improves human-computer interaction.

[0038] In the embodiment, the axis A of the motor assembly 2 extends through the transmission assembly 3 and the output end 4; further, the center lines of the output end 4, the transmission assembly 3 and the motor assembly 2 are located on the same center axis; further, the center lines of the output end 4, the transmission assembly 3 and the motor assembly 2 are located on the axis A of the motor assembly 2, so that the appearance of the power tool is more beautiful.

[0039] In the embodiment, the diameter of the handle portion 14 is smaller than the diameter of the second housing 12, and the diameter of the handle portion 14 is 120mm to 180mm, which makes the user hold more comfortable.

[0040] Please refer to Figure 2 and Figure 4As shown, the switch assembly 5 is installed in the first housing 11, and the switch assembly 5 comprises a switch element 51 electrically connected to the motor assembly 2 and a switch trigger 52 for triggering the switch element 51, the switch element 51 is located between the controller assembly 6 and the motor assembly 2, and the switch trigger 52 is at least partially exposed outside the first housing 11 for a user to operate.

[0041] In the embodiment, the switch element 51 is a main circuit switch, and the switch trigger 52 is a long rod trigger, and an end of the switch trigger 52 is pivotally installed to the housing 1, and a user can press the switch trigger 52 to start the motor assembly 2.

[0042] Preferably, the mounting seat 13 is formed with a protrusion 131a protruding towards the side of the switch trigger 52, i.e., the protrusion 131a is the lowermost end of the mounting seat 13, and is closer to the first end of the power tool 100 than the distal end 131c of the mounting seat 13, wherein the distal end 131c of the mounting seat 13 is the uppermost end of the mounting seat 13; please refer to Figure 6 As shown, the battery pack 200 has a first end 200a and a second end 200b, the first end 200a is closer to the output end 4 than the second end 200b, and the first end 200a abuts against the protrusion 131a; in addition, the second housing 12 is provided with a protrusion 12a at a position below the transmission assembly, and when the power tool 100 is installed with the battery pack 200 and placed on a flat surface P, the first end 200a and the second protrusion 12a jointly act to support the power tool 100 and prevent it from falling over, further, a receiving area 131b is formed between the first end 200a and the protrusion 12a, specifically, the receiving area 131b is surrounded by the battery pack 200, the mounting seat 13, the first housing 11 and the second housing 12, and is located at the lower end of the axis A of the motor assembly 2, and the switch trigger 52 is completely accommodated in the receiving area 131b; in addition, the switch assembly 5 further comprises a reverse self-locking switch 53, and the distance between the first end 200a and the axis A of the motor assembly 2 should be greater than the distance between the lowermost end of the reverse self-locking switch 53 and the axis A of the motor assembly 2, so that when the power tool 100 is placed on the flat surface P, the reverse self-locking switch 53 will not touch the flat surface P, and accidental starting will not occur.

[0043] In order for a user to successfully start the switch element 51, the reverse self-locking switch 53 must be unlocked first, i.e., the inside of the housing 1 is formed with a joint portion 50, the joint portion 50 comprises a joint surface 501 in contact with the reverse self-locking switch 53, and the reverse self-locking switch 53 can slide along the joint surface 501 to be unlocked.

[0044] In the embodiment, the joint portion 50 can be provided as shown in Figure 7The structure in the structure, in which the joint part 50 includes a joint part protrusion 50a and a joint part body 50b, the lower surface of the joint part body 50b forms a joint surface 501a, the connecting arm 532 of the reverse self-locking switch 53 abuts against the joint part protrusion 50a when the reverse self-locking switch 53 does not rotate, at which time the reverse self-locking switch 53 restricts the pivoting of the switch trigger 52, and the connecting arm 532 slides on the joint surface 501a when the reverse self-locking switch 53 rotates.

[0045] Please refer to Figure 10 and Figure 11 The utility model also provides another reverse self-locking switch structure. Specifically, the switch trigger 52 includes a rotating shaft 521 connected to the shell 1 and pivoted relative to the shell 1 and a trigger body 522 extending from the rotating shaft 521, the rotating shaft 521 is close to the first end of the shell 1, or the rotating shaft is close to the second end of the shell 1. The reverse self-locking switch 53 is arranged on the side of the trigger body 522 away from the rotating shaft 521, the trigger body 522 is provided with an opening 5221, and the reverse self-locking switch 53 is at least partially accommodated in the opening 5221 and moves in the opening 5221.

[0046] The reverse self-locking switch 53 includes a pivoting shaft 531, a connecting arm 532 extending from the pivoting shaft 531 towards the joint part 50 and a control part 533 extending from the pivoting shaft 531 away from the joint part 50, and the connecting arm 532 contacts the joint surface 501. The trigger body 522 is provided with a through opening 5222 in the side wall of the opening 5221, and the pivoting shaft 531 is installed in the opening 5222.

[0047] Next, the unlocking process of the reverse self-locking switch is described. The reverse self-locking switch 53 has a first position that restricts the movement of the switch trigger 52 relative to the switch element 51 and a second position that does not restrict the movement of the switch trigger 52 relative to the switch element 51, that is, the connecting arm 532 contacts the joint surface 501 through the connecting point 5321 to slide: in the first position, the user cannot press down the switch trigger 52 due to the reverse support force of the joint surface 501 on the connecting arm 532, and in this position, the angle formed by the connecting line of the connecting point 5321 and the center of the pivoting shaft 531 and the joint surface 501 is 90 degrees; when the connecting arm 532 slides to the second position, the user can press down the switch trigger 52 to make the switch element 51 connect, and in this position, the angle formed by the connecting line of the connecting point 5321 and the center of the pivoting shaft 531 and the joint surface 501 is 75 degrees, that is, when the connecting arm 532 slides from the first position to the second position, the angle formed by the connecting line of the connecting point 5321 and the center of the pivoting shaft 531 and the joint surface 501 decreases from 90 degrees to 75 degrees. Through the above sliding trigger, the reverse self-locking switch 53 will not be stuck by the shell 1, so that the switch trigger 52 can be pressed to the bottom, avoiding the user's secondary operation on the switch trigger 52.

[0048] The joint part 50 can be provided in a structure with a completely triangular cross section, which enables the entire operation of the reverse self-locking switch 53 to be in contact with the joint surface 501, and thus the user can have a better experience.

[0049] In addition, the switch trigger 52 includes a buckling part 523 extending from the end of the trigger main body 522 away from the rotating shaft 521, the housing 1 includes a buckling arm 17 matched with the buckling part 523 and a dustproof part 18 connected between the joint part 50 and the buckling arm 17, and the joint part 50, the buckling arm 17 and the dustproof part 18 are in an integrated structure. Further, at least part of the joint part 50 extends between the reverse self-locking switch 53 and the buckling part 523, so that the reverse self-locking switch 53 and the joint part 50 can be touched; further, the dustproof part 18 is formed with a space for the buckling part 523 to move, which ensures the normal operation of the switch trigger 52; further, the cooperation between the buckling part 523 and the buckling arm 17 and the arrangement of the dustproof part 18 can effectively prevent external dust from entering the inside of the housing.

[0050] In the embodiment, the controller assembly 6 is accommodated in the mounting seat 13, and the controller assembly 6 is arranged at an angle relative to the axis A of the motor assembly 2, and the axis A of the motor assembly 2 extends through the controller assembly 6.

[0051] Please refer to Figure 2 and Figure 5 The electric tool 100 includes the electric wire 8 connected between the motor assembly 2, the switch assembly 5 and the controller assembly 6, the switch element 51 is provided with a wire passing channel 511, and at least part of the electric wire 8 is arranged in the wire passing channel 511. Since the number of the electric wire 8 is large, the wire passing channel 511 makes the arrangement of the electric wire 8 more neat and facilitates the arrangement of the electric wire 8.

[0052] Please refer to Figure 2 and Figure 4 The motor assembly 2 includes the stator 21 and the rotor 22 connected with each other, the fan 23 driven by the rotor 22 and the first bearing 24 and the second bearing 25 supported on the front and back sides of the rotor shaft 221 of the rotor 22; wherein the first bearing 24 is located in the first housing 11, and the second bearing 25 is located in the second housing 12.

[0053] Further, the stator 21 and the fan 23 are located between the first bearing 24 and the second bearing 25, and the rotor shaft 221 extends into the second housing 12 and is connected with the transmission assembly 3.

[0054] In the embodiment, the fan 23 is located between the stator 21 and the transmission assembly 3, the casing 1 is provided with a through air inlet 15 and an air outlet 16, the air inlet 15 is formed in the mounting seat 13 and is adjacent to the controller assembly 6, and the air outlet 16 is adjacent to the fan 23. The fan 23 is arranged as a centrifugal fan. When the motor assembly 2 drives the output end 4 to rotate, the fan 23 also rotates at a high speed to generate a cooling airflow flowing into the air inlet 15 and flowing out of the air outlet 16. The cooling airflow flows through the controller assembly 6, the switch assembly 5 and the motor assembly 2 in sequence to efficiently cool the controller assembly 6, the switch assembly 5 and the motor assembly 2.

[0055] In the embodiment, the motor assembly 2 is a brushless DC motor. The motor assembly 2 further comprises a Hall plate 28 fixedly installed on the stator 21 by screws. The Hall plate 28 is electrically connected to the controller assembly 6.

[0056] Referring to Figures 2 to 4 As shown in the figure, the transmission assembly 3 comprises a shift wire 32 connected to the planetary gear reduction mechanism 31 and a shift knob 33 moving the shift wire 32. The shift knob 33 is exposed to the second casing 12 for a user to operate. The shift knob 33 is arranged to change the transmission ratio of the planetary gear reduction mechanism 31. In order not to affect the user's operation of the switch trigger 52, the shift knob 33 and the switch trigger 52 are located on the upper and lower sides of the transmission assembly 3.

[0057] In the embodiment, the transmission assembly 3 can be switched between a high-speed gear (first gear) and a low-speed gear (second gear). In the high-speed gear, the electric tool 100 is used for polishing work, the transmission ratio is 1:5, and the output rotation speed is 2700 rpm to 3300 rpm. In the low-speed gear, the electric tool 100 is used for drilling work, the transmission ratio is 1:15, and the output rotation speed is 900 rpm to 1100 rpm.

[0058] Preferably, in the high-speed gear, the output rotation speed of the electric tool 100 is 3000 rpm; in the low-speed gear, the output rotation speed of the electric tool 100 is 1000 rpm.

[0059] Referring to Figure 4 , Figures 7 to 9 and Figure 12 As shown in the figure, the electric tool 100 further comprises a lighting assembly 7 installed on the front end of the second casing 12, i.e., the lighting element 7 is located at the first end of the casing 1 and is adjacent to the output end 4. The lighting assembly 7 is connected to the controller assembly 6 by an electric wire 8. The motor assembly 2 is located between the lighting lamp assembly 7 and the controller assembly 6, i.e., the electric wire 8 extends from the lighting assembly 7, passes through the motor assembly 2 and the switch assembly 5, and is connected to the controller assembly 6.

[0060] Next, the wiring of the illumination assembly 7 is described. The electric wire 8 leading from the illumination assembly 7 first extends between the transmission assembly 3 and the inner wall of the casing 1, in which region the shift knob 33 and the electric wire 8 are located on both sides of the transmission assembly 3. Subsequently, the electric wire 8 needs to extend between the motor assembly 2 and the trigger body 522, since the trigger body 522 is located between the controller assembly 6 and the illumination assembly 7, and the illumination assembly 7 and the trigger body 522 are located on the same side of the axis A of the motor assembly 2.

[0061] Further, the electric wire at the motor assembly 2 is held by a first wire retaining groove 101 and a second wire retaining groove 102, which are located on both sides of the motor assembly 2. Specifically, the first wire retaining groove 101 is arranged adjacent to the rotating shaft 521, and the second wire retaining groove 102 is located between the motor assembly 2 and the switch element 51. When the switch trigger 52 is not depressed, the electric wire 8 will not fall under the action of the first wire retaining groove 101 and the second wire retaining groove 102.

[0062] Turning back to Figure 12 The trigger body 522 includes a bottom wall 5223 for user operation, a pair of side walls 5224 extending from both sides of the bottom wall 5223 towards the motor assembly 2, and an avoiding space 5228 formed by the bottom wall 5223 and the pair of side walls 5224. When the switch trigger 52 is depressed, at least part of the electric wire 8 is accommodated in the avoiding space 5228, effectively preventing damage to the electric wire 8 by the switch trigger 52. In addition, the trigger body 522 includes a reinforcing rib 5225 protruding from the bottom wall 5223 and an avoiding groove 5226 defined by the reinforcing rib 5225, the avoiding groove 5226 being communicated with the avoiding space 5228, and the avoiding groove 5226 further expands the accommodation space of the electric wire 8.

[0063] When the electric wire 8 leaves the region where the motor assembly 2 is located, the electric wire 8 passes through the switch element 51. At this time, part of the electric wire 8 is arranged on the side of the switch element 51, which prevents damage to the electric wire by the trigger button on the lower side of the switch element.

[0064] Further, the illumination assembly 7 in the embodiment includes an illumination lamp 71 connected to the controller assembly 6 and a lampshade 72 shielding the illumination lamp 71. The illumination lamp 71 is powered by the battery pack 200 and is configured to illuminate the working area in a dim environment. The lampshade 72 is mounted to the front end of the second casing 12 and has a light guide surface 711 through which the light of the illumination lamp 71 penetrates. The angle C between the light guide surface 711 and the axis A of the motor assembly 2 is between 35 degrees and 60 degrees, so that the illumination assembly 7 has a better illumination effect.

[0065] Preferably, the angle C between the light guide surface 711 and the axis A of the motor assembly 2 is between 40 degrees and 60 degrees.

[0066] In the embodiment, the wire 8 is finally connected to the controller assembly 6 after leaving the area where the switch element 51 is located, the controller assembly 6 comprises a controller substrate 61 and a capacitor 62 mounted on the controller substrate 61, the controller substrate 61 and the motor assembly 2 sandwich the handle portion 14, the controller substrate 61 is used to send control instructions to the operation of the motor assembly 2, and the capacitor 62 smoothes and stabilizes the DC output of the power supply, thereby reducing the influence of alternating pulsating current on the electronic circuit. Specifically, the axis A of the motor assembly 2 passes through the controller substrate 61 and the capacitor 62, and the controller substrate 61 is arranged obliquely relative to the axis A of the motor assembly 2. Since the battery pack 200 is inserted through the insertion slot 131 and the mounting seat 13, in order to ensure the compactness of the casing 1 in the up-down direction, the insertion slot 131 should be parallel to the extension direction of the controller substrate 61.

[0067] In addition, since the wire 8 passes through the capacitor 62 when being connected to the controller substrate 61, in order to reduce the interference of the capacitor 62 on the wire 8, the capacitor 62 can be arranged perpendicularly to the controller substrate 61 and protrude into the first casing 11, and on this basis, the capacitor 62 is arranged at an angle of 20-40 degrees relative to the axis A of the motor assembly 2, and the angle is preferably 30 degrees.

[0068] The utility model discloses an angle B formed by the insertion slot 131 and the axis A of the motor assembly 2 is less than 90 degrees, so that when the battery pack 200 is installed to the power tool 100, the battery pack 200 is arranged obliquely relative to the axis A of the motor assembly 2, and the height occupied by the battery pack 200 in the up-down direction is reduced. Therefore, when the user operates the power tool 100, the battery pack 200 is not easy to interfere with the arm of the user, greatly improving the experience and comfort of the user. In addition, the end surface of the mounting seat 13 close to the handle portion 14 is arranged as an inclined surface 132, so that the height occupied by the mounting seat 13 in the up-down direction is reduced, and the mounting seat 13 is not easy to interfere with the arm of the user, the user is more comfortable, and it is more in line with ergonomics. The switch element 51 is provided with a wire passage 511, and at least part of the wire 8 is arranged in the wire passage 511. Since the number of wires 8 is large, the wire passage 511 makes the arrangement of the wire 8 more neat and facilitates wire arrangement. In addition, the angle C between the light guide surface 711 and the axis A of the motor assembly 2 is between 35 degrees and 60 degrees, so that the lighting assembly 7 has better lighting effect.

[0069] Further, the electric tool 100 can be used for repairing the tire, especially for polishing the inner surface of the tire. Specifically, the inner surface of the tire is in a cylindrical shape, when the electric tool 100 polishes the inner surface of the tire, the axis A of the motor assembly 2 and the tire define a chord, and during the repairing process of the electric tool 100, the axis A of the motor assembly 2 is parallel to the chord. In addition, the battery pack 200 is inserted into the mounting seat 13 in an inclined manner relative to the axis A of the motor assembly 2, which can reduce the contact between the battery pack 200 and the inner surface of the tire when the electric tool 100 repairs the tire.

[0070] The utility model is not limited to the above specific implementation. Those skilled in the art can easily understand that the electric tool of the utility model has many other alternative solutions without departing from the principles and categories of the utility model. The protection scope of the utility model is subject to the contents of the claims.

Claims

1. A power tool comprising a housing, a motor assembly mounted within the housing, an output driven by the motor assembly, and a switch assembly for controlling the start-stop of the motor assembly; characterized by: The switch assembly comprises a switch element electrically connected to the motor assembly, a switch trigger for triggering the switch element, and an anti-self-locking switch mounted on the switch trigger, the switch trigger being at least partially exposed outside the casing for being operated by a user, the switch trigger being a long lever type trigger, an end of the switch trigger being pivotally mounted to the casing, the anti-self-locking switch being located on the opposite side of the end of the switch trigger.

2. The power tool of claim 1, wherein: The electric tool comprises a joint portion matched with the anti-self-locking switch, the joint portion comprising a joint surface in contact with the anti-self-locking switch, the anti-self-locking switch comprising a pivot shaft, a connecting arm extending from the pivot shaft towards the joint portion, the connecting arm being arranged to be inclined relative to the joint surface.

3. The power tool of claim 2, wherein: The anti-self-locking switch has a first position for limiting the movement of the switch trigger relative to the switch element and a second position for not limiting the movement of the switch trigger relative to the switch element, in the first position, an end of the anti-self-locking switch abuts against the joint surface.

4. The power tool of claim 3, wherein: The anti-self-locking switch comprises a handle portion extending from the pivot shaft away from the joint portion, the connecting arm being in contact with the joint surface.

5. The power tool of claim 4, wherein: The connecting arm comprises a connecting point in contact with the joint surface, from the first position to the second position, an angle formed by the connecting point and the center line of the pivot shaft and the joint surface is between 75 degrees and 90 degrees.

6. The power tool of claim 4, wherein: The switch trigger comprises a rotating shaft connected to the casing and pivotable relative to the casing, and a trigger body extending from the rotating shaft, the anti-self-locking switch being arranged on the side of the trigger body away from the rotating shaft.

7. The power tool of claim 6, wherein: The trigger body is provided with an opening, the anti-self-locking switch being at least partially accommodated in the opening and movable in the opening; the trigger body is provided with a through hole in the side wall of the opening, the pivot shaft being mounted in the through hole.

8. The power tool of claim 6, wherein: The casing has opposite first and second ends, the output end being located at the first end, the rotating shaft being close to the first end of the casing, or the rotating shaft being close to the second end of the casing.

9. The power tool of claim 6, wherein: The switch trigger comprises a buckling portion extending from the end of the trigger body away from the rotating shaft, the buckling portion abutting against the casing.

10. The power tool of claim 9, wherein: The casing comprises a buckling arm matched with the buckling portion and a dustproof portion connected between the joint portion and the buckling arm, at least part of the joint portion extending between the anti-self-locking switch and the buckling portion, the dustproof portion being formed with a space for the buckling portion to move.

Images