Electric Ratchet Wrench

Abstract

To provide an electric ratchet wrench.SOLUTION: An electric ratchet wrench includes a tool head unit 2, an output unit 3, a wrench body unit 4, an electric unit, and a control unit. The wrench body unit 4 includes a sleeve member 42 which defines a front space, an intermediate space and a rear space, and has a maximum gripping length L1 and a maximum width H, and a ratio of the maximum gripping length L1 to the maximum width H is within the range of 3 to 9. The electric unit includes an electric motor which is connected to a rear ring part of the wrench body unit 4 and converts electric energy into kinetic energy, and a transmission sub-unit which is connected to a front ring part of the wrench body unit 4 and transmits the kinetic energy to a head driving device 31 of the output unit 3. The control unit includes the control module which is connected to the electric motor by signal, and a battery module which is electrically connected to the control module and supplies electric energy.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an electric ratchet wrench, and more particularly to an electric ratchet wrench with a built-in battery. [Background technology]

[0002] 1 and 2, the conventional electric ratchet wrench disclosed in Cited Document 1 includes a tool head 11, a body 12 connected to the tool head 11, an output member 13 attached to the tool head 11 and outputting rotational energy, a motor 14 attached to the body 12 and operable to convert electrical energy into kinetic energy, a battery cell 15 attached to the body 12 and supplying power to the motor 14, a front cover 16 attached between the tool head 11 and the body 12, a reduction gear set 17 placed over the front cover 16 and transmitting kinetic energy, and a crown 18 movably disposed between the tool head 11 and the body 12 and for turning on the motor 14. The body 12 includes a support tube 121 surrounding the front cover 16 and the motor 14, and a handle 122 surrounding the support tube 121 for gripping.

[0003] In order to provide a relatively large output, the conventional electric ratchet wrench is equipped with a motor 14 that has a relatively large output and occupies a relatively large space. Furthermore, in the conventional electric ratchet wrench 1, the front cover 16, the reduction gear set 17, and the support tube 121 are sequentially fitted over each other, which increases the overall volume of the conventional electric ratchet wrench 1, as well as the longitudinal length and cross-sectional dimensions of the main body 12, making it very large and difficult to miniaturize. Therefore, the conventional electric ratchet wrench is difficult to operate in a limited space. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2022 / 0266439 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, an object of the present disclosure is to provide an electric ratchet wrench that can alleviate at least one of the drawbacks of the prior art. [Means for solving the problem]

[0006] According to the present disclosure, an electric ratchet wrench includes a tool head unit, an output unit, a wrench body unit, an electric unit, and a control unit. The tool head unit extends along a first axis. The output unit includes a head drive device attached to the tool head unit, extends along a second axis intersecting the first axis, and is configured to rotate in a selected direction and output rotational energy. The wrench body unit extends along the first axis and is detachably connected to the tool head unit. The wrench body unit defines a front space adjacent to the tool head unit, a rear space opposite the front space along the first axis, and an intermediate space disposed between the front space and the rear space and spatially communicating with the front space and the rear space. The wrench body unit has a maximum grip length extending along the first axis and includes a sleeve member. The sleeve member has an outer surface extending along the first axis and surrounding the first axis, and a maximum width perpendicular to the first axis, passing through two opposing ends of the outer surface along a direction perpendicular to the first axis, and greater than the width perpendicular to the first axis of the remaining portion of the sleeve member. The ratio of the maximum gripping length to the maximum width is within a range of 3 to 9. The electric unit includes an electric motor attached to the intermediate space and operable to convert electrical energy into kinetic energy, and a transmission subunit attached to the front space and configured to transmit the kinetic energy to the head drive device. The control unit is attached to the wrench body unit and includes a control module signal-connected to the electric motor, and a battery module disposed in the rear space, electrically connected to the control module, and configured to supply electrical energy. [Brief explanation of the drawings]

[0007] Other features and advantages of the present disclosure will become apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings, in which it is noted that various features may not be drawn to scale. [Figure 1] FIG. 1 is a partially exploded perspective view of a conventional electric ratchet wrench disclosed in U.S. Patent Application Publication No. 2022 / 0266439. [Figure 2] FIG. 1 is a schematic front view of a conventional electric ratchet wrench. [Figure 3] 1 is a perspective view of an embodiment of an electric ratchet wrench according to the present disclosure; FIG. [Figure 4] FIG. 2 is a cross-sectional view of the embodiment showing a state in which the trigger of the electric ratchet wrench is in a normal position. [Figure 5] FIG. 2 is a partially exploded perspective view of the embodiment. [Figure 6] FIG. 2 is an exploded perspective view of a transmission subunit and a support ring according to the embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 5 is a view similar to FIG. 4, but showing the trigger in a depressed position. DETAILED DESCRIPTION OF THE INVENTION

[0008] Before describing this disclosure in more detail, it should be noted that, where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.

[0009] For clarity of description herein, terms such as "top," "bottom," "top," "bottom," "up," "above," "over," "below," "above," and the like may be used throughout the disclosure with reference to features shown in the drawings. Features may be oriented differently (e.g., rotated 90 degrees or at other orientations) and spatially relative terms used herein may be interpreted accordingly.

[0010] 3, 4, and 5, an embodiment of the electric ratchet wrench of the present disclosure includes a tool head unit 2, an output unit 3, a wrench body unit 4, an electric unit 5, and a control unit 6.

[0011] In this embodiment, the tool head unit 2 includes an H-shaped portion 21 and a neck portion 22 connected to the H-shaped portion 21 and extending along a first axis.

[0012] The output unit 3 includes a head driving device 31 and a yoke 32 .

[0013] The head drive 31 is attached to the H-shaped portion 21 of the tool head unit 2, extends along a second axis that intersects the first axis, and is configured to rotate in a selected direction and output rotational energy. In this embodiment, the second axis is substantially perpendicular to the first axis.

[0014] The yoke 32 includes an annular toothed portion 321 that surrounds the head drive 31 and an actuating portion 322 that extends into the neck 22 .

[0015] As the output unit 3 is well known in the relevant art and is not a distinctive feature of the present disclosure, further details will be omitted in the following description for the sake of brevity.

[0016] 4 to 6, the wrench body unit 4 extends along the first axis and is detachably connected to the neck portion 22 of the tool head unit 2. The wrench body unit 4 includes a support ring 41 that surrounds the first axis and defines a front space 401 and an intermediate space 402, a sleeve member 42 that covers a portion of the support ring 41 and defines a rear space 403, and a connecting ring 43 that is connected to the support ring 41 and is located opposite the sleeve member 42 along the first axis. The front space 401, the intermediate space 402, and the rear space 403 are arranged in that order on the first axis. The intermediate space 402 is spatially connected to the front space 401 and the rear space 403.

[0017] The support ring 41 includes a front ring portion 411 that defines a forward space 401, and a rear ring portion 412 that is opposite the front ring portion 411 along the first axis and defines an intermediate space 402. The front ring portion 411 has a plurality of grooves 413 formed in its inner surface and extending from its edge toward the rear ring portion 412. The rear ring portion 412 has a plurality of slots 414 formed through its outer and inner surfaces.

[0018] 5 to 7, in this embodiment, the sleeve member 42 extends along the first axis and is made up of two interlocking halves 421. The sleeve member 42 has an outer surface 420 surrounding the first axis and includes a plurality of protrusions 422 formed on its inner surface, each of which engages with a plurality of slots 414 in the rear ring portion 412. The number of protrusions 422 is the same as the number of slots 414, which is four in this embodiment. The connection between the protrusions 422 and the slots 414 increases the connection strength between the sleeve member 42 and the support ring 41. The sleeve member 42 has two storage compartment defining walls 424 extending from its outer surface 420 toward the support ring 41 in a direction substantially parallel to the second axis to define a storage compartment 423, and two guide grooves 425 (see FIG. 8) formed in each of the two storage compartment defining walls 424.

[0019] The connecting ring 43 is threadedly engaged with the front ring portion 411 of the support ring 41 and the neck portion 22 of the tool head unit 2 so that the wrench body unit 4 is detachably connected to the tool head unit 2 .

[0020] 4 to 6, the electric unit 5 includes an electric motor 51 and a transmission sub-unit 52.

[0021] The electric motor 51 is attached to the intermediate space 402 and connected to the rear ring portion 412 of the support ring 41. The electric motor 51 is operable to convert electrical energy into kinetic energy, and includes a spindle 511 extending into the front space 401 and rotatable about the first axis, and a transmission gear 512 fitted over the spindle 511 and connected to the spindle 511 so as to be rotatable together with the spindle 511. In this embodiment, the maximum output power of the electric motor 51 is 55 watts, and the electric motor 51 has a length along the first axis that is shorter than the length of the rear ring portion 412 along the first axis.

[0022] The transmission subunit 52 is attached to the front space 401 and is connected to the front ring portion 411. The transmission subunit 52 is configured to transmit kinetic energy from the electric motor 51 to the head drive device 31. In this embodiment, the transmission subunit 52 includes an internal gear ring 521 engaged with the front ring portion 411, a plurality of planetary gears 522 meshing with the internal gear ring 521 and engaged with the transmission gear 512 so as to be connected to the spindle 511 so as to rotate together with the spindle 511, and a gear plate 523 connected to the plurality of planetary gears 522 and the yoke 32. The internal gear ring 521 includes a plurality of ribs 524 formed on its outer surface and engaged with each of the plurality of grooves 413. In this embodiment, the plurality of grooves 413 are spaced apart at equal angles from one another, and the plurality of ribs 524 are complementary in shape to the grooves 413 and aligned with the grooves 413. Furthermore, the number of ribs 524 is the same as the number of grooves 413, which is four in this embodiment. The gear plate 523 meshes with the planetary gear 522 and is driven by the planetary gear 522 to rotate the yoke 32 and transmit kinetic energy to the head drive device 31.

[0023] The control unit 6 is attached to the wrench body unit 4 and includes a control module 61, a sensor 62, a first light-emitting element 63, four second light-emitting elements 64, a battery module 65, a display member 66, a trigger 67, and an elastic element 68.

[0024] The control module 61 is disposed in a part of the intermediate space 402 and the rear space 403 , and is signal-connected to the electric motor 51 .

[0025] The sensor 62 is electrically connected to the control module 61 and is operable to output a sensing signal to the control module 61 when the trigger 67 is pressed. The trigger 67 is connected to the sleeve member 42 and is disposed in a storage compartment 423 defined by two storage compartment defining walls 424, and is operable to turn on the electric motor 51.

[0026] The first light-emitting element 63 is attached to the sleeve member 42 and electrically connected to the control module 61. In this embodiment, the first light-emitting element 63 is disposed between the neck portion 22 of the tool head unit 2 and the trigger 67, and is configured to emit a light beam substantially toward the second axis. A first included angle (θ1) is defined between the light beam emitted from the first light-emitting element 63 and the first axis, and the first included angle (θ1) is in the range of 40 to 50 degrees. In this embodiment, the first included angle (θ1) is 45 degrees.

[0027] Each of the second light-emitting elements 64 is electrically connected to the control module 61 and is aligned in a direction parallel to the first axis.

[0028] The battery module 65 is disposed in the rear space 403, is electrically connected to the control module 61, and is configured to supply electrical energy. In this embodiment, the battery module 65 includes a battery 651 that supplies electrical energy to the electric motor 51, the control module 61, the sensor 62, the first light-emitting element 63, and each of the second light-emitting elements 64. The battery 651 is a rechargeable lithium battery that stores electrical energy, but the present disclosure is not limited thereto.

[0029] 4, 5, and 7, the indicator 66 is attached to the sleeve member 42 of the wrench body unit 4 to indicate the remaining power of the battery module 65. The indicator 66 includes four windows 661 aligned in a direction parallel to the first axis, and four light guiding strips 662 each disposed between a respective one of the second light emitting elements 64 and a respective one of the windows 661 to guide a light beam emitted by each one of the second light emitting elements 64 to a respective one of the windows 661.

[0030] The trigger 67 is pivotally connected to the sleeve member 42 and rotatably disposed in the housing portion 423. Specifically, the trigger 67 includes two flange portions 671 (see FIG. 8) formed on opposite sides thereof and each flange portion 671 is received in each guide groove 425, and a trigger portion 672 extending toward the sensor 62 in a direction substantially parallel to the second axis and movable relative to the sensor 62. The trigger 67 can pivot relative to the sleeve member 42 between a pressed position (see FIG. 9) and a normal position (see FIG. 4). When the trigger 67 is positioned in the pressed position, the trigger portion 672 of the trigger 67 presses the sensor 62. When the trigger 67 is positioned in the normal position, the trigger portion 672 of the trigger 67 is spaced apart from the sensor 62, and a second included angle (θ2) that the trigger 67 forms with the first axis is within a range of 2 degrees to 5 degrees. In this embodiment, the second included angle (θ2) is 3 degrees.

[0031] A resilient element 68 is mounted between the sleeve member 42 and the trigger 67 and provides a force biasing the trigger 67 away from the sensor 62 towards its normal position.

[0032] The control module 61 is configured to turn on the electric motor 51 and the first light-emitting element 63 when it receives a detection signal from the sensor 62, and to turn off the electric motor 51 when the sensor 62 does not receive a detection signal while the trigger portion 672 is not pressed, and to turn off the first light-emitting element 63 after a predetermined period has elapsed since the electric motor 51 was turned off. In this embodiment, the predetermined period is 10 seconds, but is not limited to this.

[0033] The control module 61 is further configured to turn on the second light-emitting elements 64 based on the remaining power of the battery module 65. The number of second light-emitting elements 64 that are turned on is positively correlated with the remaining power of the battery module 65. For example, the percentage of the remaining power of the battery module 65 may be an arithmetic progression of 25, 50, 75, and 100. When the percentage of the remaining power of the battery module 65 is 100%, the control module 61 turns on four second light-emitting elements 64. In this manner, the light emitted from each second light-emitting element 64 propagates along a respective one of the light-guiding strips 662 to a respective one of the windows 661 so that the light is emitted outside the four windows 661. Similarly, when the percentage of the remaining power of the battery module 65 is 75%, the control module 61 turns on three second light-emitting elements 64. When the percentage of remaining power of the battery module 65 is 50%, the control module 61 turns on two second light-emitting elements 64. When the percentage of remaining power of the battery module 65 is 25%, the control module 61 turns on one second light-emitting element 64. When the percentage of remaining power of the battery module 65 is 0%, the control module 61 does not turn on any second light-emitting element 64, and therefore the four second light-emitting elements 64 do not emit light.

[0034] 3, 4, 7, and 8, the wrench body unit 4 has a maximum gripping length (L1) extending along the first axis. The wrench body unit 4 and the tool head unit 2 are aligned along the first axis and have a maximum total length (L2) along the first axis. The sleeve member 42 is perpendicular to the first axis, passes through two ends of the outer surface 420 that are oppositely positioned along a direction intersecting the first axis, and has a maximum width that is greater than the width of the remainder of the sleeve member 42 that is perpendicular to the first axis. The sleeve member 42 also has a minimum width that is perpendicular to the first axis, passes through two ends of the outer surface 420 that are oppositely positioned along a direction intersecting the first axis, passes through the intermediate space 402, and is less than the width of the remainder of the sleeve member 42 that is perpendicular to the first axis.

[0035] The maximum gripping length (L1) is within the range of 70 mm to 200 mm. In some embodiments, the maximum gripping length (L1) is within the range of 145 mm to 155 mm, 70 mm to 150 mm, 70 mm to 110 mm, or 70 mm to 102 mm. In this embodiment, the maximum gripping length (L1) is 150 mm. The maximum total length (L2) is within the range of 121 mm to 260 mm. In some embodiments, the maximum total length (L2) is within the range of 121 mm to 215 mm, 121 mm to 160 mm, 121 mm to 153 mm, or 210 mm to 220 mm. The maximum width is within the range of 34 mm to 59 mm. In some embodiments, the maximum width is within the range of 39 mm to 56 mm, 34 mm to 46 mm, 45.5 mm to 59 mm, or 40 mm to 46 mm. In this embodiment, the maximum width is 44 mm. The minimum width is in the range of 34 mm to 49 mm. In this embodiment, the minimum width is in the range of 35 mm to 48 mm.

[0036] The ratio of the maximum total length (L2) to the maximum width is in the range of 3 to 9. In some embodiments, the ratio of the maximum total length (L2) to the maximum width is in the range of 4 to 9, 3 to 4.2, or 3 to 4. The ratio of the maximum total length (L2) to the maximum width is in the range of 4.5 to 11. In some embodiments, the ratio of the maximum total length (L2) to the maximum width is in the range of 6 to 11 or 4.5 to 6. In this embodiment, the ratio of the maximum total length (L2) to the maximum width is 5.1.

[0037] The maximum width and the minimum width may not pass through the intermediate space 402 and the light emitting element 63. In another embodiment of the present disclosure, the maximum width and the minimum width pass through the rear space 403, as shown in Fig. 8. The maximum width can vary along the first axis, provided that the ratio of the maximum gripping length (L1) to the maximum width and the ratio of the maximum total length (L2) to the maximum width are within the above ranges.

[0038] When a user grips the wrench body unit 4 and presses the trigger 67 to move the trigger 67 to the pressed position, the trigger portion 672 presses the sensor 62, which then outputs a detection signal to the control module 61. In this way, upon receiving the detection signal, the control module 61 turns on the electric motor 51 and the first light-emitting element 63.

[0039] At this time, the light beam emitted by the first light-emitting element 63 is directed substantially toward the second axis, thereby causing bolts and nuts (not shown) positioned below the head drive unit 31 and driven by the head drive unit 31 to fall within the light-emitting range of the first light-emitting element 63 and be illuminated.

[0040] The kinetic energy from the electric motor 51 is transmitted by the transmission subunit 52 to drive the actuating portion 322 of the yoke 32 to pivot, and to drive the head drive device 31 via the annular teeth portion 321 to rotate about the second axis, thereby enabling the electric ratchet wrench to tighten or loosen bolts or nuts (not shown).

[0041] When the user releases the trigger 67 and the trigger 67 is returned to its normal position by the elastic element 68, the sensor 62 stops outputting the sensing signal to the control module 61, so that the electric motor 51 is immediately turned off, and the first light-emitting element 63 is turned off after the predetermined period, for example, 10 seconds, has elapsed since the electric motor 51 was turned off.

[0042] In conclusion, the advantages of the above embodiment are as follows:

[0043] First, the structural strength of the electric ratchet wrench is relatively high and it can also provide a smooth, stepless appearance thanks to the support ring 41. Furthermore, the maximum gripping length (L1), maximum overall length (L2) and maximum width of the electric ratchet wrench are relatively short, so the overall volume of the electric ratchet wrench is relatively compact, which is beneficial for operating the electric ratchet wrench in a limited space.

[0044] Secondly, the electric motor 51 can be operated by simply pressing the trigger 67 with the fingers holding the wrench body unit 4, which is very convenient and easy to use.

[0045] Third, the first light emitting element 63 illuminates the parts driven by the electric ratchet wrench, which is useful for using the electric ratchet wrench.

[0046] For purposes of explanation, numerous specific details have been set forth above to facilitate a thorough understanding of the embodiments. However, it will be apparent to one skilled in the art that one or more other embodiments may be practiced without these specific details. Furthermore, in the description of "one embodiment" or "an embodiment" herein, all references to "one embodiment" or "an embodiment" accompanied by an ordinal number or other designation should be understood to include specific aspects, structures, and features of the present invention. Furthermore, although multiple variations may be incorporated into one embodiment, drawing, or description thereof, this is for the purpose of streamlining the description and understanding the multifaceted aspects of the present disclosure. Furthermore, one or more features or specific embodiments of one embodiment may, where appropriate, be combined with one or more features or specific embodiments of other embodiments in the implementation of the present disclosure. [Explanation of symbols]

[0047] 2 Tool Head Unit 21 H-shaped part 22 Neck 3 Output Unit 31 Head drive unit 32 York 321 Annular tooth 322 Operating unit 4 Wrench main unit 401 Front space 402 Intermediate Space 403 Rear space 41 Support ring 411 Front ring part 412 Rear ring part 413 Groove 414 Slots 42 sleeve member 420 External surface 421 Half body 422 Protrusion 423 Storage area 424 Storage area boundary wall 425 Guide groove 43 Connecting Ring 5 Electric unit 51 Electric motor 511 Spindle 512 Transmission gear 52 Transmission subunit 521 Internal gear ring 522 Planetary Gear 523 Gear Plate 524 Ribs 6. Control Unit 61 Control Module 62 sensors 63 First light-emitting element 64 Second light-emitting element 65 Battery Module 651 Battery 66 Display components 661 Window 662 Light guide strip 67 Trigger 671 Flange 672 Trigger section 68 Elastic element θ1 First included angle θ2 Second included angle L1 Maximum gripping length L2 Maximum total length

Claims

1. The wrench includes a tool head unit, an output unit, a wrench body unit, an electric unit, and a control unit. the tool head unit extends along a first axis; the output unit includes a head drive attached to the tool head unit, extends along a second axis intersecting the first axis, and is configured to rotate in a selected direction and output rotational energy; the wrench body unit extends along the first axis, is detachably connected to the tool head unit, and defines a front space adjacent to the tool head unit, a rear space opposite the front space along the first axis, and an intermediate space disposed between the front space and the rear space and spatially communicating with the front space and the rear space; the wrench body unit extends along the first axis, has a maximum grip length that is an overall length of the wrench body unit, and includes a sleeve member; the sleeve member has an outer surface extending along the first axis and surrounding the first axis, and a maximum width perpendicular to the first axis, passing through two ends of the outer surface at opposite positions along a direction perpendicular to the first axis, the maximum width being greater than a width perpendicular to the first axis of the remainder of the sleeve member, wherein the ratio of the maximum gripping length to the maximum width is in the range of 3 to 9; the electric unit is mounted in the intermediate space and is an electric motor operable to convert electrical energy into kinetic energy; a transmission subunit attached to the front space and configured to transmit the kinetic energy to the head drive device; the control unit is attached to the wrench body unit; and a control module in signal communication with the electric motor; a battery module disposed in the rear space, electrically connected to the control module, and configured to supply electrical energy; The wrench body unit further includes a support ring having a portion surrounded by the sleeve member that defines the rear space, The support ring has a front ring portion that defines the front space and is connected to the tool head unit; a rear ring portion opposite the front ring portion along the first axis and defining the intermediate space; the electric motor is connected to the support ring and has a length along the first axis that is shorter than a length along the first axis of the rear ring portion; the wrench body unit further includes a connecting ring that threadably engages with the front ring portion of the support ring and the tool head unit such that the wrench body unit is connected to and detachable from the tool head unit along the first axis; the sleeve member extends in a direction substantially parallel to the second axis to define a recess, and has two recess-defining walls at one of the two ends of the outer surface; two guide grooves formed in the two storage section defining walls, respectively; the control unit further includes a trigger connected to the sleeve member, rotatably disposed in the housing, operable to turn on the electric motor, and including two flange portions; The two flange portions are formed on opposite sides of the trigger, are respectively received in the two guide grooves, and are movable relative to the two guide grooves in a direction parallel to the second axis.

2. the electric motor includes a spindle extending into the forward space and rotatable about the first axis; The transmission subunit includes an internal gear ring engaged with the front ring portion; a plurality of planetary gears connected to the spindle for rotation therewith and meshing with the internal gear ring; 2. The electric ratchet wrench according to claim 1, further comprising: a gear plate that meshes with the plurality of planetary gears, is driven to rotate by the plurality of planetary gears, and transmits kinetic energy to the head driving device.

3. the front ring portion of the support ring has a plurality of grooves formed in its inner surface and extending from its edge toward the rear ring portion; 3. The electric ratchet wrench according to claim 2, wherein the internal gear ring includes a plurality of ribs formed on an outer surface thereof, each rib engaging with one of the plurality of grooves.

4. the control unit further includes a sensor electrically connected to the control module; the trigger further includes a trigger portion extending toward the sensor in a direction substantially parallel to the second axis and movable relative to the sensor; The electric ratchet wrench according to claim 1 , wherein the control module is configured to turn on the electric motor upon receiving a sensing signal from the sensor when the sensor is pressed against the trigger portion.

5. the trigger is pivotally connected to the sleeve member and is pivotable relative to the sleeve member between a depressed position and a normal position; the pressing position is a position where the trigger portion of the trigger presses the sensor, 5. The electric ratchet wrench according to claim 4, wherein the normal position is a position where the trigger portion is spaced from the sensor and an included angle formed by the trigger and the first axis is within a range of 2 degrees to 5 degrees.

6. the control unit further includes a light emitting element attached to the sleeve member, electrically connected to the control module, disposed between the tool head unit and the trigger, and configured to emit a light beam substantially toward the second axis; 2. The electric ratchet wrench according to claim 1, wherein an included angle formed between the light beam emitted by the light-emitting element and the first axis is in a range of 40 degrees to 50 degrees.

7. the wrench body unit and the tool head unit are aligned along the first axis and have a maximum combined length along the first axis; The electric ratchet wrench according to any one of claims 1 to 6, wherein the ratio of the maximum total length to the maximum width is in the range of 4.5 to 11.

8. 8. The electric ratchet wrench according to claim 7, wherein the ratio of the maximum total length to the maximum width is in one of a range of 4.5 to 6 and a range of 6 to 11.

9. the control module includes a trigger connected to the sleeve member and positioned adjacent the front space, the trigger operable to turn on the electric motor; a light emitting element attached to the sleeve member, electrically connected to the control module, disposed between the tool head unit and the trigger, and configured to emit a light beam substantially toward the second axis; The electric ratchet wrench according to claim 7 , wherein the maximum width passes through the intermediate space and the light emitting element.

10. 8. The electric ratchet wrench according to claim 7, wherein the maximum total length is in the range of 121 mm to 260 mm, and the maximum gripping length is in the range of 70 mm to 200 mm.

11. The electric ratchet wrench according to claim 10, wherein the maximum total length is within a range of 210 mm to 220 mm, and the maximum gripping length is within a range of 145 mm to 155 mm.

12. 12. The electric ratchet wrench according to claim 11, wherein the ratio of the maximum gripping length to the maximum width is one of a range of 4 to 9 and a range of 3 to 4.

2.

13. The electric ratchet wrench according to any one of claims 1 to 6, wherein the maximum width is in one of a range of 34 mm to 59 mm and a range of 34 mm to 46 mm.

14. the sleeve member further has a minimum width perpendicular to the first axis, passing through two ends of the outer surface at opposite positions along a direction intersecting the first axis, passing through the intermediate space, which is smaller than a width perpendicular to the first axis of the remaining portion of the sleeve member, and which is within a range of 35 mm to 48 mm; The electric ratchet wrench according to any one of claims 1 to 6, wherein the maximum width passing through the rear space is in a range of 45.5 mm to 59 mm.

15. the sleeve member further has a minimum width perpendicular to the first axis, passing through two ends of the outer surface at opposite positions along a direction intersecting the first axis, passing through the intermediate space, which is smaller than a width perpendicular to the first axis of the remaining portion of the sleeve member, and which is within a range of 34 mm to 49 mm; The electric ratchet wrench according to any one of claims 1 to 6, wherein the maximum width passes through the rear space and is within a range of 39 mm to 56 mm.

16. the control unit includes a plurality of light-emitting elements electrically connected to the control module and aligned in a direction parallel to the first axis; a display member attached to the wrench body unit for indicating the remaining power of the battery module; The display member includes a plurality of windows arranged in a direction parallel to the first axis and through which light passes; a plurality of light guiding strips, each of which is disposed between a respective one of the light emitting elements and a respective one of the windows, for guiding a light beam emitted by a respective one of the light emitting elements to a respective one of the windows; The electric ratchet wrench according to any one of claims 1 to 6, wherein the control unit is configured to turn on the light-emitting elements based on the remaining amount of power of the battery module, and the number of the light-emitting elements that are turned on is positively correlated with the remaining amount of power of the battery module.

17. the control unit includes a trigger connected to the sleeve member, positioned adjacent to the front space, and operable to turn on the electric motor; a light emitting element attached to the sleeve member, electrically connected to the control module, disposed between the tool head unit and the trigger, and configured to emit a light beam substantially toward the second axis; The electric ratchet wrench according to any one of claims 1 to 6, wherein the maximum width passes through the intermediate space and the light emitting element.

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