Power tool

Abstract

A power tool includes a housing that includes a motor housing and a secondary housing. The power tool includes an output device configured to provide a rotary output, an axial hammer output, or both a rotary output and an axial hammer output. The power tool further comprises a transmission mechanism located in the auxiliary shell. The power tool also includes a lamp holder having a plurality of light sources distributed about an output axis of the power tool. The lamp holder includes an annular portion mounted to the front surface of the secondary housing. The lamp holder also includes an extension arm extending downward and away from the annular portion in the channel of the secondary housing. The power tool includes lighting power lines located within the channel and covered by an extension arm.

Description

[0001] Related Applications

[0002] This application claims priority to U.S. Provisional Application No. 63 / 505,025, filed May 30, 2023, and U.S. Provisional Application No. 63 / 513,714, filed Jul. 14, 2023, the entire contents of each of which are incorporated herein by reference. Technical Field

[0003] Some disclosed embodiments relate to a handheld power tool including a lighting assembly. Specifically, some disclosed embodiments relate to a power tool including a shadowless work light assembly configured to illuminate a work area. Background Art

[0004] A handheld power tool may include one or more work lights configured to illuminate a work area of the power tool. For example, the power tool may include a single work light positioned near an output device of the power tool to illuminate the area where the output unit provides an output (e.g., drilling into a workpiece, fastening a fastener to a workpiece, etc.).

[0005] Some power tools may include a work light located on a front surface of the power tool and configured to illuminate the work area of the power tool. For example, a rotary hammer may include a single light-emitting diode (LED) positioned near an output device configured to transfer rotational energy from the rotary hammer to a workpiece. When a user operates the rotary hammer, the LED may illuminate the workpiece so that the user can more easily see the workpiece. However, using a single LED may cause the output device to project a shadow, which may have a negative impact on the visibility of the fastener. To address this issue, a power tool may include a plurality of LEDs radially positioned around the output device or end tool of the power tool. Arranging a plurality of LEDs around the output device achieves uniform illumination of all sides of the output unit or end tool, which prevents the projection of shadows. This type of lighting is generally referred to as shadowless lighting.

[0006] Although shadowless lighting helps improve the visibility of fasteners and / or the work area, implementing shadowless lighting in a power tool (e.g., on the front surface of a gearbox) may cause additional problems. For example, each LED mounted to the front surface of the power tool may require multiple wires to supply power and / or control signals to the LED. The more LEDs included, the more wires may be required. Therefore, a power tool implementing shadowless lighting requires an effective method to position these wires in the limited space provided within the handheld power tool. Summary of the Utility Model

[0007] One embodiment provides a power tool that may include a housing that includes a motor housing and a sub-housing. The power tool may also include a motor located within the motor housing. The power tool may also include an output device configured to provide a rotational output, an axial hammering output, or both a rotational output and an axial hammering output. The power tool may also include a transmission mechanism configured to transmit rotational energy from the motor to the output device of the power tool. At least a portion of the transmission mechanism may be located within the sub-housing. The power tool may also include a lamp holder that includes a plurality of light sources distributed around the output axis of the power tool, and the output device is located on the output axis. The lamp holder may include an annular portion that is mounted to the front surface of the sub-housing. The annular portion may surround the output axis. The lamp holder may also include an extension arm that extends downward and away from the annular portion in a channel of the sub-housing. The channel may be formed by a protrusion on the circumferential surface of the bottom of the sub-housing. The extension arm may extend backward along at least half of the axial length of the sub-housing in a direction parallel to the output axis. The power tool may also include illumination power lines configured to supply power to the plurality of light sources. The illumination power lines may be located within the channel and may be covered by the extension arm. The lamp holder may also include a first substrate located at the bottom of the rear surface of the annular portion. A first light source may be mounted to the first substrate. The lamp holder may also include a second substrate located on the rear surface of the annular portion. A second light source may be mounted to the second substrate. The lamp holder may also include a third substrate located on the rear surface of the annular portion. A third light source may be mounted to the third substrate. The illumination power lines may be coupled to the first substrate. A first group of additional illumination power lines may be coupled to the first substrate and the second substrate. A second group of additional illumination power lines may be coupled to the first substrate and the third substrate.

[0008] In addition to any combination of the features described above, the sub-housing may include a hole located at the rear of the channel, and the illumination power lines enter the housing of the power tool through the hole.

[0009] In addition to any combination of the features described above, the rear end of the extension arm may be configured to be inserted into a hole located at the rear of the channel of the sub-housing.

[0010] In addition to any combination of the features described above, the shape of the first substrate may be different from the shapes of the second substrate and the third substrate.

[0011] In addition to any combination of the features described above, the second light source and the third light source may be electrically connected in parallel with each other.

[0012] Another embodiment provides a power tool that may include a housing that includes a motor housing and a sub-housing. The power tool may also include a motor located within the motor housing. The power tool may also include an output device configured to provide a rotational output, an axial hammering output, or both a rotational output and an axial hammering output. The power tool may also include a transmission mechanism configured to transmit rotational energy from the motor to the output device of the power tool. At least a portion of the transmission mechanism may be located within the sub-housing. The power tool may also include a lamp holder that includes a plurality of light sources distributed around the output axis of the power tool, and the output device is located on the output axis. The lamp holder may include an annular portion that is mounted to the front surface of the sub-housing. The annular portion may surround the output axis. The lamp holder may also include an extension arm that extends downward and away from the annular portion within a channel of the sub-housing. The channel may be formed by a protrusion on the circumferential surface of the bottom of the sub-housing. The extension arm may extend backward along at least half of the axial length of the sub-housing in a direction parallel to the output axis. The power tool may also include lighting power lines configured to supply power to the plurality of light sources. The lighting power lines may be located within the channel and may be covered by the extension arm. The annular portion may include a plurality of through holes, each of which is configured to receive a fastener. Each fastener may be received in a corresponding hole on the front surface of the sub-housing to fix the lamp holder to the sub-housing.

[0013] In addition to any combination of the features described above, the sub-housing may include a hole located at the rear of the channel, and the lighting power lines enter the housing of the power tool through the hole.

[0014] In addition to any combination of the features described above, the rear end of the extension arm may be configured to be inserted into a hole located at the rear of the channel of the sub-housing.

[0015] In addition to any combination of the features described above, the lamp holder may include a first substrate located at the bottom of the rear surface of the annular portion. A first light source may be mounted to the first substrate. The lamp holder may also include a second substrate located on the rear surface of the annular portion. A second light source may be mounted to the second substrate. The lamp holder may also include a third substrate located on the rear surface of the annular portion. A third light source may be mounted to the third substrate. The lighting power lines may be connected to the first substrate. A first additional group of lighting power lines may be connected to the first substrate and the second substrate. A second additional group of lighting power lines may be connected to the first substrate and the third substrate.

[0016] In addition to any combination of the features described above, the rear surface of the annular portion may include a plurality of recessed portions, each of which is configured to receive a lens. Each lens may include an outer circumferential surface having a protrusion. The protrusion may be configured to fit into a notch on the inner circumferential surface of the annular portion. The lens may be configured to receive a substrate. The first light source may be mounted to the substrate.

[0017] Another embodiment provides a power tool that may include a housing that includes a motor housing and a sub-housing. The power tool may further include a motor located within the motor housing. The power tool may further include an output device configured to provide a rotational output, an axial hammering output, or both a rotational output and an axial hammering output. The power tool may further include a transmission mechanism configured to transmit rotational energy from the motor to the output device of the power tool. At least a portion of the transmission mechanism may be located within the sub-housing. The power tool may further include a lamp holder that may include a plurality of light sources distributed around the output axis of the power tool, and the output device is located on the output axis. The lamp holder may include an annular portion that is mounted to the front surface of the sub-housing. The annular portion may surround the output axis. The lamp holder may further include an extension arm that extends downward and away from the annular portion in a channel of the sub-housing. The channel may be formed by a protrusion on the bottom circumferential surface of the sub-housing. The power tool may further include illumination power lines configured to supply power to the plurality of light sources. The illumination power lines may be located within the channel and may be covered by the extension arm.

[0018] In addition to any combination of the features described above, the sub-housing may include a hole located at the rear of the channel, through which the illumination power lines enter the housing of the power tool.

[0019] In addition to any combination of the features described above, the rear end of the extension arm may be configured to be inserted into a hole located at the rear of the channel of the sub-housing.

[0020] In addition to any combination of the features described above, the channel in the sub-housing may include a shelf configured to hold a substrate on which a sensor is mounted.

[0021] In addition to any combination of the features described above, the extension arm may extend rearward along at least half of the axial length of the sub-housing in a direction parallel to the output axis.

[0022] In addition to any combination of the features described above, the lamp holder may include a first substrate located at the bottom of the rear surface of the annular portion. The first light source may be mounted to the first substrate. The lamp holder may further include a second substrate located on the rear surface of the annular portion. The second light source may be mounted to the second substrate. The lamp holder may further include a third substrate located on the rear surface of the annular portion. The third light source may be mounted to the third substrate. The lighting power line may be coupled to the first substrate. The first additional lighting power line group may be coupled to the first substrate and the second substrate. The second additional lighting power line group may be coupled to the first substrate and the third substrate.

[0023] In addition to any combination of the features described above, the shape of the first substrate may be different from the shapes of the second substrate and the third substrate.

[0024] In addition to any combination of the features described above, the second light source and the third light source may be electrically connected in parallel with each other.

[0025] In addition to any combination of the features described above, the annular portion may include a plurality of through holes, each of which is configured to receive a fastener. Each fastener may be received in a corresponding hole on the front surface of the sub-housing to fix the lamp holder to the sub-housing.

[0026] In addition to any combination of the features described above, the rear surface of the annular portion may include a plurality of recessed portions, each of which is configured to receive a lens. Each lens may include an outer circumferential surface having a protrusion. The protrusion may be configured to fit into a notch on the inner circumferential surface of the annular portion. The lens may be configured to receive the substrate. The first light source may be mounted to the substrate.

[0027] Before explaining any embodiments in detail, it should be understood that the embodiments are not limited to the details of the configuration and arrangement of the components set forth in the following description or shown in the drawings. The embodiments can be practiced or carried out in various ways. In addition, it should be understood that the language and terms used herein are for the purpose of description and should not be regarded as restrictive. The use of "including", "comprising" or "having" and their variants means covering the items listed thereafter and their equivalents, as well as additional items. Unless otherwise specified or limited, the terms "mounted", "connected", "supported" and "coupled" and their variants are used broadly, and these terms cover both direct mounting, connection, support and coupling and indirect mounting, connection, support and coupling.

[0028] In addition, it should be understood that embodiments can include hardware, software, and electronic components or modules, and for purposes of discussion, these electronic components or modules may be shown and described as if most components are implemented only in hardware. However, those of ordinary skill in the art will recognize, based on a reading of this detailed description, that in at least one embodiment, the electronic aspects can be implemented in software (e.g., stored on a non-transitory computer-readable medium) executable by one or more processing units such as a microprocessor and / or an application specific integrated circuit (“ASIC”). Thus, it should be noted that embodiments can be implemented using multiple hardware- and software-based devices and multiple different structural components. For example, “servers,” “computing devices,” “controllers,” “processors,” etc. described in the specification can include one or more processing units, one or more computer-readable media modules, one or more input / output interfaces, and various connectors (e.g., a system bus) connecting these components.

[0029] Relative terms used in conjunction with a quantity or condition, such as “about,” “approximately,” “substantially,” etc., will be understood by those of ordinary skill in the art to include the recited value and to have the meaning ascribed by the context (e.g., the term includes at least the degree of error associated with the measurement accuracy, the tolerances associated with a particular value [e.g., manufacturing, assembly, use, etc.], etc.). Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. For example, the expression “from about 2 to about 4” also discloses the range “from 2 to 4.” The relative term can refer to a positive or negative percentage of the indicated value (e.g., 1%, 5%, 10%, or more).

[0030] It should be understood that although some of the figures show hardware and software located within a particular device, these depictions are for illustrative purposes only. The functions described herein as being performed by one component can be performed by multiple components in a distributed manner. Similarly, the functions performed by multiple components can be combined and performed by a single component. In some embodiments, the components shown can be combined or divided into separate software, firmware, and / or hardware. For example, the logic and processing can be distributed among multiple electronic processors rather than being located within and performed by a single electronic processor. Regardless of how the hardware components and software components are combined or divided, these hardware components and software components can be located on the same computing device or can be distributed among different computing devices connected by one or more networks or other suitable communication links. Similarly, a component described as performing a particular function can also perform additional functions not described herein. For example, a device or structure “configured” in a certain way is at least configured in that way, but can also be configured in ways not explicitly listed.

[0031] Other aspects of these embodiments will become apparent by considering the detailed description and the drawings. Description of the Drawings

[0032] Figure 1 Shows a perspective view of a power tool according to some embodiments described herein.

[0033] Figure 2A and Figure 2B Shows a cross-sectional view of a power tool according to some embodiments described herein. Figure 1 of the power tool.

[0034] Figure 3 Shows a block diagram of a power tool according to some embodiments described herein. Figure 1 of the power tool.

[0035] Figure 4A and Figure 4B Shows a perspective view of a gearbox of a power tool according to some embodiments described herein. Figure 1 of the power tool.

[0036] Figure 5A Shows a front perspective view of a lamp holder of a work light assembly of a power tool according to some embodiments described herein. Figure 1 of the power tool.

[0037] Figure 5B Shows a rear perspective view of a lamp holder according to some embodiments described herein. Figure 5A of the lamp holder.

[0038] Figure 5C Shows a side view of a lamp holder according to some embodiments described herein. Figure 5A of the lamp holder.

[0039] Figure 5D Shows a front view of a power tool according to some embodiments described herein, wherein the lamp holder is transparently shown. Figure 1 of the power tool. Figure 5A of the lamp holder.

[0040] Figure 5E Shows a rear perspective view of another embodiment of a lamp holder 110 according to some embodiments described herein. Figure 5A of the power tool.

[0041] Figure 5F Shows a rear perspective view of a lens 520 of a lamp holder 110 according to some embodiments described herein. Figure 5E of the lamp holder 110.

[0042] Figure 5G Shows a front perspective view of a lens 520 of a lamp holder 110 according to some embodiments described herein. Figure 5E of the lamp holder 110.

[0043] Figure 6Shows a side profile view of a power tool according to some embodiments described herein Figure 1 in which Figure 4A and Figure 4B Figure 4A and Figure 4B gearboxes are transparently shown.

[0044] Figure 7 Shows a perspective view of another example of a lamp holder of a work light assembly of a power tool according to some embodiments described herein Figure 1 in which ,

[0045] , Figure 8A

[0045] Figure 8A Shows a top perspective view of a potting boat for a printed circuit board (PCB) of a power tool that houses Figure 1 according to some embodiments described herein Figure 1 in which ,

[0046] , Figure 8B

[0046] Figure 8B Shows a bottom perspective view of a potting boat and a PCB of Figure 8A according to some embodiments described herein Figure 8A in which ,

[0047] , Figure 8C

[0047] Figure 8C Shows a top perspective view of a potting boat of Figure 8A with the PCB removed according to some embodiments described herein Figure 8A in which ,

[0048] , Figure 8D

[0048] Figure 8D Shows a bottom perspective view of a potting boat of Figure 8A with the PCB removed according to some embodiments described herein Figure 8A in which DETAILED DESCRIPTION

[0049] Figure 1 Shows a power tool 100 including a lighting assembly / system (e.g., a work light assembly) according to an example embodiment. The power tool 100 includes a housing, which may include a clamshell housing 102 and a gearbox 105, among other components. The clamshell housing 102 may be configured to house a motor 202 (e.g., a brushed motor, a brushless DC (BLDC) motor, etc.). A portion of the housing configured to house the motor 202 may be referred to as the motor housing or body of the power tool 100. In some embodiments, the housing may be formed of two pieces of plastic configured to mate (e.g., the clamshell housing 102) such that an internal cavity is formed within the housing. A portion of the housing may be formed as a handle 104 to allow a user to grip the power tool 100. A trigger 120 may be positioned on the handle 104 to allow the user to actuate the trigger 120 to variably control at least one parameter of the power tool 100. In Figure 1 and Figure 2AIn [the figure], the trigger 120 is not shown, but the reference numeral 120 is still used to indicate the location where the trigger 120 is located. In some embodiments, this parameter may be the amount of electric power supplied to the motor 202 of the power tool 100.

[0050] The housing may further include a connection portion (e.g., the battery pack interface 125), and the connection portion may include an interface (not shown) configured to be removably coupled to the battery pack 127. The interface may include electrical contacts to allow the electric power from the battery pack 127 to be transmitted to the power tool 100 (e.g., to supply electric power to the motor 202 and other components of the power tool 100). As Figure 1 and Figure 2A shown, the battery pack interface 125 may be coupled to the handle 104 and may be located below the handle 104.

[0051] The power tool 100 may further include an output device 130 (e.g., a blade / cutter head / tool holder), and the output device is located at one end of the housing (e.g., the output end of the housing) to provide the output of the power tool 100. For example, Figure 1 the output device 130 of the power tool 100 shown is configured to hold a drill bit, and Figure 1 the output of the power tool 100 shown is a rotational output and / or an axial / translational output. However, the output device 130 may be configured to hold other types of tools, cutter heads, etc., and / or may be configured to provide other types of outputs (e.g., rotary impact output, reciprocating output, etc.) for other types of power tools 100. In some embodiments, the output device 130 may include fittings (e.g., chucks, collets, etc.) to removably couple an end tool (e.g., a saw blade, a cutter head, etc.) to the output device 130. In other embodiments, the output device 130 may be formed such that a fastener can be directly removably coupled to the output device 130 to perform operations such as loosening or tightening the fastener, drilling in a workpiece, etc. In some instances, for example, for different types of power tools 100, the positioning of different parts of the power tool 100 (e.g., the motor housing, the handle 104, the output device 130, etc.) may be different from Figure 1 the positioning shown.

[0052] The power tool 100 may further include a work light assembly, and the work light assembly includes a lamp holder 110 located on the front surface 420 of the gearbox 105. The lamp holder 110 may include an annular / circular portion 505 (see Figure 2A ) around the output axis A of the power tool 100 (see Figures 5A to 5C ), and the output device 130 of the power tool 100 rotates around this output axis. The lamp holder 110 may include an extension arm 510 (see Figures 5A to 5C ), and the extension arm extends along asFigures 1 to 2B extends circumferentially along the bottom surface 425 of the gearbox 105 shown. The lamp holder 110 may include three openings, each configured to receive a lens 520 and a PCB / substrate 525 on which a light emitting diode (LED) 330 is mounted (see Figure 5B ). For example, in response to the trigger 120 being actuated, the LED 330 may provide light through the lens 520 to illuminate the work area in an approximately shadow-free manner.

[0053] The power tool 100 may further include a user input device 115 (e.g., a user input dial 115) to allow the user to adjust the operating mode of the power tool 100. For example, the user input dial 115 is configured to rotate to select one of multiple modes of the power tool. Such modes may include a hammer-only mode (e.g., only axial hammering motion of the output shaft of the power tool 100), a rotation-only mode (e.g., only rotational motion of the output shaft), or a rotary hammer mode (e.g., both rotational and axial motion of the output shaft).

[0054] The power tool 100 optionally includes a dust collector attachment 135 and an auxiliary handle 140. In some instances, these components 135 and 140 may be removably attached to the power tool 100. However, in some instances, the power tool 100 may operate without one or both of these components 135 and 140. In some instances, when the power tool 100 is a different type of power tool, the different type of power tool may not be configured to receive one or both of the components 135 and 140.

[0055] The specific power tool 100 (e.g., rotary hammer) shown and described herein is merely an example. The work light assembly disclosed herein can also be implemented on other types of power tool devices, including other power tools, battery packs, battery chargers, other power tools, test and measurement equipment, vacuum cleaners, job site radios, outdoor power equipment, non-motorized tools for task lighting applications, and vehicles. Power tools can include drills, circular saws, jigsaws, band saws, reciprocating saws, screwdrivers, angle grinders, straight grinders, hammers, multi-tools, impact wrenches, rotary hammers, impact drivers, angle drills, pipe cutters, grease guns, sanders, woodworking trimmers, etc. Battery chargers can include wall chargers, multi-port chargers, travel chargers, etc. Test and measurement equipment can include digital multimeters, clamp meters, fork meters, wall scanners, infrared (IR) thermometers, laser rangefinders, laser levels, remote displays, insulation testers, hygrometers, thermal imagers, inspection cameras, etc. Vacuum cleaners can include stick vacuum cleaners, handheld vacuum cleaners, upright vacuum cleaners, carpet cleaners, hard surface cleaners, canister vacuum cleaners, broomstick vacuum cleaners, etc. Outdoor power equipment can include blowers, chain saws, edgers, hedge trimmers, lawn mowers, trimmers, etc. Other non-motorized devices can include electronic key fobs, calculators, cellular telephones, headphones, cameras, motion-sensing alarms, flashlights, work lights, weather information display devices, portable power supplies, digital cameras, digital music players, radios, and multi-functional cutters.

[0056] Figure 2A and Figure 2BShows a cross-sectional view of a power tool 100 according to an example embodiment. The power tool 100 includes a motor 202 configured to provide a rotational output and / or an axial output to an output device 130 of the power tool 100. A motor shaft 204 defining the rotational axis of the motor 202 may extend in an up-and-down direction perpendicular to the output axis A of the power tool 100. The power tool 100 may include a transmission mechanism / device configured to transfer the rotational output / energy of the motor 202 to another type of motion (e.g., axial motion) of the output device 130 and / or transfer it in a different direction (e.g., cause rotation of the output shaft and thus rotation of the output device 130 about the output axis A). The transmission mechanism may be a gear transmission mechanism, an electronic transmission mechanism, an impact transmission mechanism, a scotch-yoke mechanism, a combination of various types of transmission mechanisms, etc. In some instances, the transmission mechanism may include only a connection structure located between the motor main shaft / shaft 204 and the output main shaft (or a single motor / output main shaft), for example, for a tool with a direct drive operation. In some instances, at least a portion of the transmission mechanism may be located within a separate sub-housing 105 (such as a gearbox 105). In some instances, the power tool 100 may further include a fan 206 located on the motor shaft 204 and configured to rotate to circulate air within the housing of the power tool 100 to cool internal components.

[0057] As Figures 2A to 2B shown, the power tool 100 may further include a printed circuit board (PCB) 205 and a PCB 210. The PCB 210 may include one or more electronic components that may implement a control system of the power tool 100, such as a power switch element 345 (e.g., a field effect transistor 345) for supplying power to the motor 202 (see Figure 3 ), a component for controlling the power switch element 345 (see Figure 3) such as the electronic processor 350. In some embodiments, the PCB 205 includes a magnetic sensor (e.g., Hall sensor) configured to sense magnetic elements included on the user input dial 115. The PCB 205 may be electrically coupled to the electronic processor 350 to allow the electronic processor 350 to determine a selected mode in which the power tool 100 should operate based on the detected position of the user input dial 115 (e.g., based on the detected position of the magnetic elements included in / on the user input dial 115). In some embodiments, the power tool 100 may include more than two PCBs 205, 210 located in other parts of the housing. In some embodiments, either of the PCBs 205, 210 may be located in different parts of the housing. In some embodiments, the electronic processor 350 is configured to receive power from a power supply connected to the power tool 100 (e.g., a battery pack 127 connected to the power tool 100 via the interface 125). The electronic processor 350 may be configured to control whether power is provided to one or more of the motor 202 and / or the light source 330 of the work light assembly. In some embodiments, the PCBs 205, 210 may include additional or alternative components. For example, some or all of the components located on the PCB 210 may be located on another PCB within the power tool 100.

[0058] Figure 3 Block diagram 300 of a power tool 100 according to an example embodiment is shown. The power tool 100 may include a controller 305. The controller 305 is electrically and / or communicatively connected to various modules or components of the power tool 100. For example, as Figure 3 shown, the controller 305 is electrically connected to the motor 202, the battery pack interface 125, the trigger switch 315 (connected to the trigger 120), one or more sensors or sensing circuits 320, one or more indicator light sources 325 (e.g., LEDs configured to be controlled to illuminate the status of the power tool 100), one or more other light sources 330 (e.g., configured to illuminate the work area), the power input circuitry 340, and the switching element 345 (e.g., FET switch 345). The controller 305 includes a combination of hardware and software that is operable to, among other things, control the operation of the power tool 100, monitor the operation of the power tool 100, activate one or more of the indicator light sources 325 and / or the light source 330, etc.

[0059] The controller 305 includes a plurality of electrical and electronic components that provide power, operation control, and protection for components and modules within the controller 305 and / or the power tool 100. For example, the controller 305 particularly includes an electronic processor 350 (e.g., a microprocessor, a microcontroller, or another suitable programmable device), a memory 355, an input unit 360, and an output unit 365. The electronic processor 350 particularly includes a control unit 370, an arithmetic logic unit (ALU) 375, and a plurality of registers 380 (shown as a set of registers in Figure 3 ), and is implemented using a computer architecture (e.g., a modified Harvard architecture, a von Neumann architecture, etc.). The electronic processor 350, the memory 355, the input unit 360, the output unit 365, and various modules or circuits connected to the controller 305 are connected through one or more control buses and / or data buses (e.g., the common bus 385). For illustrative purposes, the control bus and / or data bus are generally shown in Figure 3 . Given the embodiments described herein, those skilled in the art will understand the use of one or more control buses and / or data buses for the interconnection and communication between various modules, circuits, and components.

[0060] The memory 355 is a non-transitory computer-readable medium and includes, for example, a program storage area 357 and a data storage area 358. The program storage area 357 and the data storage area 358 may include a combination of different types of memories, such as ROM, RAM (e.g., DRAM, SDRAM, etc.), EEPROM, flash memory, a hard disk, an SD card, or other suitable magnetic memory devices, optical memory devices, physical memory devices, or electronic memory devices. The electronic processor 350 is connected to the memory 355 and executes software instructions that can be stored in the RAM of the memory 355 (e.g., during execution), the ROM of the memory 355 (e.g., on a generally permanent basis), or another non-transitory computer-readable medium such as another memory or disk. The software included in the implementation of the power tool 100 may be stored in the memory 355 of the controller 305. The software includes, for example, firmware, one or more application programs, program data, filters, rules, one or more program modules, and other executable instructions. The controller 305 is configured to obtain and particularly execute instructions related to the control processes and methods described herein from the memory 355. In other configurations, the controller 305 includes additional components, fewer components, or different components.

[0061] The battery pack interface 125 includes a combination of mechanical components (e.g., tracks, grooves, latches, etc.) and electrical components (e.g., one or more terminals), which are configured and operable to interface the power tool 100 with the battery pack 127 (e.g., mechanically, electrically, and communicatively). For example, the power supplied from the battery pack 127 to the power tool 100 is provided to the power input circuitry 340 through the battery pack interface 125. The power input circuitry 340 includes a combination of active and passive components for conditioning or controlling the power received from the battery pack 127 before providing it to the controller 305. The battery pack interface 125 may also supply power to the FET switches 345, which are configured to selectively supply power to the motor 202 in accordance with instructions from the controller 305. The battery pack interface 125 further includes, for example, a communication line 390, which is configured to allow communication between the controller 305 and the battery pack 127.

[0062] The indicator light source 325 includes, for example, one or more light emitting diodes (“LEDs”). The indicator light source 325 is configured to be controlled by the controller 305 to display the status or information associated with the power tool 100 and / or the battery pack 127 coupled to the power tool 100 via an indicator near or on the outer surface of the housing of the power tool 100. In some instances, the light source(s) 330 forming part of the work light assembly may be controlled to blink at a predetermined rate and / or a specific number of times to indicate status information of the power tool 100 and / or the battery pack 127 to the user.

[0063] In some embodiments, the controller 305 (specifically, the electronic processor 350) is configured to control whether to supply power to the light source(s) 330 (e.g., the LEDs 330 that are part of the work light assembly) and / or the indicator light source 325 that provides light to the indicator. In some embodiments, the controller 305 may receive power from the power supply of the power tool 100 and directly supply power to the indicator light source 325 and / or the light source(s) 330. In such an embodiment, before supplying power to the indicator light source 325 and / or the light source(s) 330, the controller 305 may appropriately condition the received power, e.g., via traces on the PCB 210 to which the indicator light source 325 and / or the light source(s) 330 may be coupled (e.g., via wires). In other embodiments, the indicator light source 325 and / or the light source(s) 330 may be electrically connected to the power supply through a switch between the power supply and each of the indicator light source 325 and / or the light source(s) 330 (e.g., connected to the battery pack 127 via the battery pack interface 125 and one or more wires connecting the battery pack interface 125 to the PCB 210, to which the indicator light source 325 and / or the light source(s) 330 are coupled). In such an embodiment, the controller 305 may control the switch to allow or disallow power supply to each of the indicator light source 325 and / or the light source(s) 330. In such an embodiment, the electrical path from the power supply to the indicator light source 325 and / or the light source(s) 330 may include conditioning circuitry similar to the power input circuitry 340 to condition or control the power received by the indicator light source 325 and / or the light source(s) 330 from the power supply.

[0064] The controller 305 can be configured to use the sensor 320 to monitor tool conditions and / or user input (e.g., the position of the magnetic element of the user input dial 115). For example, the controller 305 can be configured to determine whether the power tool 100 has a fault condition and generate one or more control signals related to the fault condition. In some embodiments, the sensor 320 includes one or more current sensors, one or more speed sensors, one or more Hall effect sensors, one or more temperature sensors, etc. The controller 305 calculates or includes in the memory 355 predetermined operation thresholds and limits for the operation of the power tool 100. For example, when the controller 305 detects or predicts a potential thermal failure (e.g., thermal failure of the FET 345, the motor 202, etc.), the power supply to the motor 202 can be restricted or interrupted until the likelihood of thermal failure is reduced. If the controller 305 detects one or more such fault conditions of the power tool 100 or determines that the fault condition of the power tool 100 no longer exists, the controller 305 is configured to provide information and / or control signals to another component of the power tool 100 (e.g., the battery pack interface 125, the indicator light source 325, etc.).

[0065] Figure 4A and Figure 4B FIG. shows a perspective view of the gearbox 105 of the power tool 100 according to some example embodiments. The gearbox 105 can include two protrusions 402 that define a channel 405 on the front surface 420 of the gearbox 105, and the channel extends downward along the bottom circumferential surface 425 of the gearbox 105. The extension arm 510 of the lamp holder 110 (see Figures 5A to 5C ) can be located within the channel 405. The power line 515A (see Figure 5D ) that supplies power to the light source / LED 330 of the work light assembly can also be located within the channel 405 and can be covered / protected by the extension arm 510 of the lamp holder 110 and the protrusion 402 that forms the channel 405. The channel 405 can lead to a hole 412 near the rear of the gearbox 105, and the illumination power line 515A can pass through the hole into the housing of the power tool 100, for example, to be coupled to the PCB 210 to receive power. For example, once the illumination power line 515A enters the housing of the power tool 100, the line 515A can be routed along the inner surface of the clamshell housing 102 above the top of the motor 202, below the motor 202, or around the side of the motor 202 to be coupled to the PCB 210 (e.g., by soldering, connectors, etc.).

[0066] As Figure 4B shown, a shelf 415 can be included within the channel 405. The shelf 415 can be configured to hold Figure 2A and Figure 2BThe PCB 205 shown (or other types of substrates / mounting structures on which sensors such as Hall sensors, other magnetic sensors, and / or other types of sensors may be located), such that the PCB 205 is located near the area 410 of the gearbox 105 configured to receive the user input dial 115. Mounting the PCB 205 in such a position can allow a Hall sensor on the PCB 205 to detect the presence, absence, and / or position of magnetic elements included in / on the user input dial 115. Sensor wires (not shown) coupled to the PCB 205 may extend along a path similar to the power line 515A of the work light assembly (e.g., through the hole 412 near the rear of the gearbox 105 and into the main housing of the power tool 100 to reach the PCB 210). In some instances, the Hall sensor may be mounted on the top side of the PCB 205 closer to the user input dial 115 (e.g., see Figure 7 ). In some instances, the PCB 205 may be fixed within the shelf 415 and / or the channel 405 using glue, epoxy, etc. In some instances, when the wire 515A travels within the channel 405 into the interior of the housing of the power tool 100, the lighting power line 515A may not be mounted to or otherwise contact the PCB 205.

[0067] Figure 5A A front perspective view of the lamp holder 110 of the work light assembly of the power tool 100 according to some embodiments described herein is shown. Figure 1 Figure 5B A rear perspective view of the lamp holder 110 according to some embodiments described herein is shown. Figure 5A Figure 5C A side view of the lamp holder 110 according to some embodiments described herein is shown. Figure 5A Figure 5D A front view of the power tool 100 according to some embodiments described herein is shown, with the lamp holder 110 shown transparently. Figure 1 Figure 5E A rear perspective view of another embodiment of the lamp holder 110 according to some embodiments described herein is shown. In Figure 5A , the lens 520 and the LED PCB 525 are not shown to allow the features of the rear surface of the annular portion 505 of the lamp holder 110 to be visible. Figure 5E Figure 5F A rear perspective view of the lens 520 of the lamp holder 110 according to some embodiments described herein is shown. Figure 5E Figure 5G A front perspective view of the lens 520 of the lamp holder 110 according to some embodiments described herein is shown. Figure 5E

[0068] As Figures 5A to 5B shown, the lamp holder 110 may include an annular portion 505 that surrounds the output axis A of the power tool 100 and includes portions configured to receive the lens 520 and the LED PCB 525. In some instances, the lens 520 and the LED PCB 525 are mounted to the lamp holder 110 using glue, epoxy resin, etc. In some instances, the rear surface of the annular portion 505 includes a recessed portion 545 (see Figure 5E ) configured to receive the lens 520. These recessed portions 545 may have dimensions and shapes approximately the same as the lens 520 to allow the lens 520 to fit within the recessed portion 545. In some instances, such recessed portions 545 may further include positioning tabs, pins, holes, etc. to ensure that each lens 520 is mounted in the annular portion 505 in a proper orientation. For example, holes or notches 550 (see Figure 5G ) on the front surface of each lens 520 may be configured to mate with pins 555 on the recessed portion 545 of the rear surface of the annular portion 505 to ensure that the lens 520 is properly mounted in the annular portion 505. In some instances, the lens 520 may further include positioning tabs, pins, holes, etc. to ensure that each LED PCB 525 is mounted on its corresponding lens 520 in a proper orientation. For example, holes or notches on the front surface of each LED PCB 525 may be configured to mate with / around pins 560 on the rear surface of its corresponding lens 520 (see Figure 5F ) to ensure that the LED PCB 525 is properly mounted on the rear surface of the lens 520. Each lens 520 may also include a recessed structure 565 on its rear surface that allows the light source / LED 330 on the LED PCB 525 to protrude forward into the recessed structure 565. In some instances, the recessed structure 565 on the lens 520 includes a curved and / or circular shape to emit light (e.g., in a dispersed manner) from the light source 330 outwardly toward the output device 130. In some instances, the outer circumferential surface of the lens 520 includes one or more protrusions 570 configured to mate (e.g., snap-fit) into corresponding holes / notches 575 on the inner circumferential surface of the annular portion 505 (e.g., the inner circumferential surface of the recessed portion 545) to secure or assist in securing the lens 520 in the annular portion 505. Although Figures 5E to 5G the lens 520C and associated components of the annular portion 505 are primarily shown, the features described and shown may also be included on other lenses 520 of the annular portion 505 and the associated components of such lenses.

[0069] The annular portion 505 may also include three (or more or fewer) through-holes 530 configured to receive fasteners 532 (e.g., screws, etc.) that are fixed to holes 430 on the front surface 420 of the gearbox 105 to secure the lamp holder 110 to the gearbox 105. Although the through-holes 430 are shown as being located on the flat portion of the front surface 420, in some instances, one or more of the through-holes 430 may be located on a forwardly protruding surface of the front surface 420 (e.g., a support, a protruding surface around the forwardly protruding neck portion of the gearbox 105, etc.). In some instances, the lamp holder 110 may be fixed to the gearbox 105 in additional or alternative ways. For example, the neck of the gearbox 105 surrounded by the annular portion 505 of the lamp holder 110 may include ridges / ribs or notches to allow corresponding portions of the lamp holder 110 to snap-fit onto the ridges / ribs or notches (or snap-fit onto a separate snap-fit ring located within the notch) to secure the lamp holder 110 to the gearbox 105.

[0070] The lamp holder 110 may also include an extension arm 510 that extends within the channel 405 of the gearbox 105 to cover / protect the work lamp power line 515A, the PCB 205, and the sensor line extending from the PCB 205. In some embodiments, the rear end of the extension arm 510 is configured to be inserted / friction-fitted into a hole 412 located near the rear of the gearbox 105. As Figure 5B shown, holes 511 may be present in the rear portion of the extension arm 510 to allow the line 515A and the sensor line connected to the PCB 205 to pass through the holes 511 in the arm 510 and the hole 412 in the gearbox 105 and into the main housing of the power tool 100, e.g., to be coupled to the PCB 210. Running the line 515A and the sensor line connected to the PCB 205 in the channel 405 on the outer circumferential surface of the gearbox 105 covered by the extension arm 510 allows these lines to be protected while avoiding running these lines through greasy areas caused by grease from the gears / transmission mechanisms within the gearbox 105. In some instances, the lamp holder 110 may be a molded member made of plastic or resin.

[0071] In some embodiments, the extension arm 510 includes one or more portions / projections 535 that are configured to contact the PCB 205 to secure or support the PCB 205 and / or prevent the PCB 205 from moving in at least one direction (e.g., in combination with the shelf 415 of the channel 405 of the gearbox 105). For example, the projection 535 can be configured to contact the PCB 205 to prevent the PCB 205 from axially moving forward in a direction parallel to the output axis A. In some instances, the gearbox 105 may not include the shelf 415, or the shelf 415 can be smaller or larger. In some of such instances, as Figure 7 shown, the extension arm 510 of the lamp holder 110 can include its own shelf / extension portion 705 to support the PCB 205 within the channel 405. The shelf 705 can serve as a potting tray for the PCB 205, and in some instances, as Figure 7 shown, the edge of the shelf can protrude upward to surround and secure the PCB 205. The PCB 205 can be secured within the shelf 705 using glue, epoxy resin, etc.

[0072] As Figures 8A to 8D shown, in some instances, the potting tray 805 for holding the PCB 205 can be a separate component that is not integrated with the extension arm 510. In some instances, the portions / projections 535 on the extension arm 510 are configured to contact the potting tray 805 to secure or support the potting tray 805 and / or prevent the potting tray 805 from moving in at least one direction (e.g., in combination with the larger shelf 415 of the channel 405 of the gearbox 105). For example, the projection 535 can be configured to contact the potting tray 805 to prevent the potting tray 805 from axially moving forward in a direction parallel to the output axis A. As Figures 8A to 8D shown, the potting tray 805 can include an opening 810 such that a portion of the bottom surface of the PCB 205 is exposed within the channel 405, e.g., to receive wires (e.g., power lines and / or wires for providing signals from the Hall sensor 815 to the electronic processor 350) that can be soldered to the PCB 205. The potting tray 805 can include a protruding shoulder 820 on the inner surface to support the PCB 205 while allowing a portion of the bottom surface of the PCB 205 to be exposed within the channel 405. The protruding shoulder 820 can be located on any one or a combination of the four inner surfaces of the potting tray 805. The PCB 205 can be secured within the potting tray 805 using glue, epoxy resin, etc. The potting tray 805 can be secured within the shelf 415 of the channel 405 using glue, epoxy resin, etc.

[0073] As Figure 5BAs shown, in some embodiments, the extension arm 510 includes one or more rib / wire guides 540 to assist in routing the illumination power line 515A. In other embodiments, one or more rib / wire guides 540 are not included, and the illumination power line 515A freely traverses without being supported by the extension arm 510.

[0074] As Figure 5D shown, the illumination power line 515A can connect the power source of the power tool 100 to the LED PCB 525A. Separate illumination power lines 515B and 515C can be routed from the LED PCB 525A to each of the other two LED PCBs 525B and 525C, respectively. For example, the LEDs 330B and 330C can be connected in parallel with each other. This wiring design can reduce the amount of wire used and / or the space occupied by the illumination power lines 515 compared to a wiring scheme that serially connects the LEDs 330C and 330C using a wire that extends around the entire or almost the entire circumference of the annular portion 505. Additionally, positioning the LED PCB 525A at the six o'clock position around the output axis A of the power tool 100 allows the illumination power line 515A to be shorter than if the LED PCB 525 were not located at the six o'clock position. Accordingly, the assembly of the power tool 100 can be simplified.

[0075] In some instances, the illumination power lines 515B and 515C are supported by the annular portion 505 of the lamp holder 110, while the illumination power line 515A is not supported by any part of the lamp holder 110. For example, the illumination power lines 515B and 515C can be pressed into wire clips included on the rear inner surface of the annular portion 505 and / or can be glued, epoxy glued, etc. within channels formed in the rear inner surface of the annular portion 505. In some instances, the illumination power line 515A can be connected to the LED PCB 525A by welding, using a connector that is supported only by the LED PCB 525A and not by the lamp holder 110, etc.

[0076] As Figure 5B and Figure 5D shown, the shape of the LED PCB 525A can be different from the shapes of the LED PCBs 525B and 525C. For example, the LED PCB 525A can be approximately / modified T-shaped to include additional surface area reserved for connectors for the illumination power lines 515A, 515B, and 515C. Although in Figure 5BThree separate PCBs 525 are shown, but in some instances, a single annular PCB or a partial annular PCB (e.g., a 270-degree circular-shaped PCB with an open end) can be used to mount the LEDs 330. Additionally, in some instances, the power tool 100 can include more or fewer LEDs 330 (and corresponding LED PCBs 525) in the lamp holder 110. The LEDs 330 can be evenly distributed around the output axis A in an attempt to provide approximately shadowless illumination of the work area. For example, as Figure 5D shown, the three LED PCBs 525 are spaced apart from each other by approximately 120 degrees around the output axis A.

[0077] Figure 6 Shows Figure 1 a side profile view of the power tool 100, where the gearbox 105 is shown transparently to make the lamp holder 110 more easily observable. Together with the other attachments Figure 1 up, Figure 6 shows the axial length of the extension arm 510 of the lamp holder 110. In some instances, the extension arm 510 can extend rearward from the annular portion 505 of the lamp holder 110 on the front surface 420 of the gearbox 105 along at least or approximately half of the axial length of the gearbox 105 (i.e., in a direction parallel to the output axis A). In some instances, the extension arm 510 can extend rearward from the annular portion 505 of the lamp holder 110 on the front surface 420 of the gearbox 105 by more than half of the axial length of the gearbox 105. In some instances, the extension arm 510 can extend rearward in a direction parallel to the output axis A from the annular portion 505 of the lamp holder 110 on the front surface 420 of the gearbox 105 (which is axially located in front of the user input device 115) to a point that overlaps the axial position of the user input device 115. For example, as Figure 6 shown, the extension arm 510 can extend in a direction parallel to the output axis A beyond the midpoint of the length of the user input device 115. In some instances, when a portion of the extension arm 510 extends rearward toward the clamshell housing 102, that portion of the extension arm 510 can also extend downward at an angle from the annular portion 505. For example, the first portion 510A of the extension arm 510 can extend straight downward, and the second portion 510B of the extension arm 510 can extend downward at an angle of approximately 20 degrees, approximately 30 degrees, etc. from the first portion 510A or the annular portion 505 with respect to a horizontal axis parallel to the output axis A. The second portion 510B of the extension arm 510 can extend along the corresponding bottom circumferential surface 425 of the gearbox 105 at that angle, and the bottom circumferential surface is oriented at the same angle as Figure 6 shown and explained herein.

[0078] In some instances, the power tool 100 does not include the PCB 205 and / or features associated with the mounting / locating of the PCB 205. For example, in some instances, the shelf 415 of the gearbox 105, the protrusion 535 of the lamp holder 110, the shelf 705 of the lamp holder 110, and / or the potting tray 805 may be absent. In some instances, even in the case of not including the PCB 205, the protrusion 535 and the shelf 415 or similar holding features may be included. For example, the protrusion 535 may be partially supported by the shelf 415 or another holding feature (e.g., one or more recessed structures in the channel 405) along a length portion of the extension arm 510. In some instances, the PCB 205 and / or the magnetic sensor may be located at other positions in the power tool 100 or may not be included at all. For example, different user input devices 115 that do not utilize the magnetic sensor on the PCB 205 may be included on the power tool 100.

[0079] Accordingly, the embodiments described herein particularly provide a power tool having optical fiber cables for transmitting light to the exterior of the power tool to provide status information regarding the power tool. Various features and advantages are set forth in the following claims.

Claims

1. A power tool, characterized in that: The power tool includes: A housing, the housing comprising a motor housing and a sub-housing; a motor, the motor being located in the motor housing; an output device configured to provide a rotational output, an axial hammer output, or both the rotational output and the axial hammer output; a transmission mechanism configured to transmit rotational energy from the motor to an output device of the power tool, wherein at least a portion of the transmission mechanism is located within the secondary housing; A lamp holder, the lamp holder comprising a plurality of light sources, the plurality of light sources being distributed around an output axis of the power tool, the output device being located on the output axis, wherein the lamp holder comprises: an annular portion mounted to the front surface of the secondary housing, wherein the annular portion surrounds the output axis, and an extension arm extending downwardly in a channel of the secondary housing and away from the annular portion, wherein the channel is formed by a projection on a bottom circumferential surface of the secondary housing, and wherein the extension arm extends rearwardly at least halfway along an axial length of the secondary housing in a direction parallel to the output axis; and lighting power lines configured to provide power to the plurality of light sources, wherein the lighting power lines are located within the channel and covered by the extension arm; Wherein, the lamp holder comprises: a first substrate located at a bottom of a rear surface of the annular portion, wherein a first light source is mounted to the first substrate; a second substrate located on a rear surface of the annular portion, wherein a second light source is mounted to the second substrate; and a third substrate located on a rear surface of the annular portion, wherein a third light source is mounted to the third substrate; wherein the lighting power lines are connected to the first substrate; and Wherein, a first supplementary lighting power line group is connected to the first substrate and the second substrate, and a second supplementary lighting power line group is connected to the first substrate and the third substrate.

2. The power tool according to claim 1, characterized in that: The secondary housing includes a hole at the rear of the channel through which the lighting power lines enter the housing of the power tool.

3. The power tool according to claim 2, characterized in that: The rear end of the extension arm is configured to be inserted into a hole at the rear of the passage of the secondary housing.

4. The power tool according to claim 1, characterized in that: The shape of the first substrate is different from the shapes of the second substrate and the third substrate.

5. The power tool according to claim 1, characterized in that: The second light source and the third light source are electrically connected to each other in parallel.

6. A power tool, characterized in that: The power tool includes: A housing, the housing comprising a motor housing and a sub-housing; a motor, the motor being located in the motor housing; an output device configured to provide a rotational output, an axial hammer output, or both the rotational output and the axial hammer output; a transmission mechanism configured to transmit rotational energy from the motor to an output device of the power tool, wherein at least a portion of the transmission mechanism is located within the secondary housing; A lamp holder, the lamp holder comprising a plurality of light sources, the plurality of light sources being distributed around an output axis of the power tool, the output device being located on the output axis, wherein the lamp holder comprises: an annular portion mounted to the front surface of the secondary housing, wherein the annular portion surrounds the output axis, and an extension arm extending downwardly in a channel of the secondary housing and away from the annular portion, wherein the channel is formed by a projection on a bottom circumferential surface of the secondary housing, and wherein the extension arm extends rearwardly at least halfway along an axial length of the secondary housing in a direction parallel to the output axis; and lighting power lines configured to provide power to the plurality of light sources, wherein the lighting power lines are located within the channel and covered by the extension arm; wherein the annular portion includes a plurality of through holes, each of the plurality of through holes being configured to receive a fastener; Each fastener is received in a corresponding hole on the front surface of the secondary housing to secure the lamp holder to the secondary housing.

7. The power tool according to claim 6, characterized in that: The secondary housing includes a hole at the rear of the channel through which the lighting power lines enter the housing of the power tool.

8. The power tool according to claim 7, characterized in that: The rear end of the extension arm is configured to be inserted into a hole at the rear of the passage of the secondary housing.

9. The power tool according to claim 6, characterized in that: The lamp holder comprises: a first substrate located at a bottom of a rear surface of the annular portion, wherein a first light source is mounted to the first substrate; a second substrate located on a rear surface of the annular portion, wherein a second light source is mounted to the second substrate; and a third substrate located on a rear surface of the annular portion, wherein a third light source is mounted to the third substrate; wherein the lighting power lines are connected to the first substrate; and Wherein, a first supplementary lighting power line group is connected to the first substrate and the second substrate, and a second supplementary lighting power line group is connected to the first substrate and the third substrate.

10. The power tool according to claim 6, characterized in that: The rear surface of the annular portion includes a plurality of recessed portions, each of the plurality of recessed portions being configured to receive a lens; wherein each lens comprises an outer circumferential surface having a raised portion, wherein the raised portion is configured to fit into a recess on the inner circumferential surface of the annular portion; Wherein the lens is configured to receive a substrate, and wherein the first light source is mounted to the substrate.

11. A power tool, characterized in that: The power tool includes: A housing, the housing comprising a motor housing and a sub-housing; a motor, the motor being located in the motor housing; an output device configured to provide a rotational output, an axial hammer output, or both the rotational output and the axial hammer output; a transmission mechanism configured to transmit rotational energy from the motor to an output device of the power tool, wherein at least a portion of the transmission mechanism is located within the secondary housing; A lamp holder, the lamp holder comprising a plurality of light sources, the plurality of light sources being distributed around an output axis of the power tool, the output device being located on the output axis, wherein the lamp holder comprises: an annular portion mounted to the front surface of the secondary housing, wherein the annular portion surrounds the output axis, and an extension arm extending downwardly in a channel of the secondary housing and away from the annular portion, wherein the channel is formed by a raised portion on a bottom circumferential surface of the secondary housing; and Lighting power lines are configured to provide power to the plurality of light sources, wherein the lighting power lines are located within the channel and covered by the extension arm.

12. The power tool according to claim 11, characterized in that: The secondary housing includes a hole at the rear of the channel through which the lighting power lines enter the housing of the power tool.

13. The power tool according to claim 12, characterized in that: The rear end of the extension arm is configured to be inserted into a hole at the rear of the passage of the secondary housing.

14. The power tool according to claim 11, characterized in that: The channel in the secondary housing includes a shelf configured to hold a substrate with a sensor mounted thereon.

15. The power tool according to claim 11, characterized in that: The extension arm extends rearwardly at least halfway along the axial length of the auxiliary housing in a direction parallel to the output axis.

16. The power tool according to claim 11, characterized in that: The lamp holder comprises: a first substrate located at a bottom of a rear surface of the annular portion, wherein a first light source is mounted to the first substrate; a second substrate located on a rear surface of the annular portion, wherein a second light source is mounted to the second substrate; and a third substrate located on a rear surface of the annular portion, wherein a third light source is mounted to the third substrate; wherein the lighting power lines are connected to the first substrate; and Wherein, a first supplementary lighting power line group is connected to the first substrate and the second substrate, and a second supplementary lighting power line group is connected to the first substrate and the third substrate.

17. The power tool according to claim 16, characterized in that: The shape of the first substrate is different from the shapes of the second substrate and the third substrate.

18. The power tool according to claim 16, characterized in that: The second light source and the third light source are electrically connected to each other in parallel.

19. The power tool according to claim 11, characterized in that: The annular portion includes a plurality of through holes, each of the plurality of through holes being configured to receive a fastener; Each fastener is received in a corresponding hole on the front surface of the secondary housing to secure the lamp holder to the secondary housing.

20. The power tool according to claim 11, characterized in that: The rear surface of the annular portion includes a plurality of recessed portions, each of the plurality of recessed portions being configured to receive a lens; wherein each lens comprises an outer circumferential surface having a raised portion, wherein the raised portion is configured to fit into a recess on the inner circumferential surface of the annular portion; Wherein the lens is configured to receive a substrate, and wherein the first light source is mounted to the substrate.

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