Illuminating device and electric tool with same

Abstract

The utility model discloses a lighting device which solves various problems caused by the fact that a lighting device on an electric tool in the prior art cannot be adjusted. The lighting device comprises a base and a shell, the base is installed on an electric tool, the shell is provided with a containing cavity, a lighting component is installed in the containing cavity, a plurality of tooth grooves are formed in one of the shell and the base in the circumferential direction, a rotating shaft is installed on the other one of the shell and the base, and the tooth grooves are communicated with the rotating shaft. The shell and the base are rotationally connected through the rotating shaft, the rotating shaft comprises a rotating shaft body and an elastic part integrally formed on the rotating shaft body, the free end of the elastic part is provided with convex teeth, the convex teeth are meshed with the tooth grooves to lock the shell and the base, and the elastic part deforms to achieve unlocking. The utility model further provides the electric tool which comprises the lighting device in the technical scheme.

Description

Technical Field

[0001] The utility model relates to the field of lighting devices, in particular to a lighting device used on an electric tool. Background Art

[0002] When operators are using power tools (such as garden power tools, handheld power tools, etc.), if the working environment is not bright enough, they need to turn on lighting tools to illuminate the working area.

[0003] The lighting devices on existing power tools are usually not adjustable, resulting in the lighting devices being unable to meet the lighting range requirements of different working environments, or being unable to meet the lighting range requirements of operators of different heights. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and to propose a lighting device to solve various problems caused by the non-adjustability of the lighting device on the electric tool in the prior art.

[0005] In order to achieve the above technical objectives, the utility model proposes a lighting device, including a base and a shell, the base is installed on the electric tool, the shell has a cavity, and the lighting component is installed in the cavity, one of the shell and the base is circumferentially provided with a plurality of teeth and grooves, and the other is installed with a rotating shaft, the shell and the base are rotatably connected through the rotating shaft, the rotating shaft includes a rotating shaft body and an elastic part integrally formed on the rotating shaft body, the free end of the elastic part is provided with a convex tooth, the convex tooth engages with the tooth groove to lock the shell and the base, and the elastic part is deformed to disengage the convex tooth from the tooth groove to unlock.

[0006] Preferably, the elastic portion includes a connecting portion and a cantilever portion, the connecting portion is formed by radially extending from one end of the rotating shaft body, the cantilever portion is arranged at one end of the connecting portion away from the rotating shaft body, and the protruding tooth is arranged on the cantilever portion.

[0007] Preferably, a reinforcing rib is connected between the rotating shaft body and the connecting portion.

[0008] Preferably, the cantilever parts are provided in plurality, the plurality of cantilever parts are circumferentially distributed on the shaft body, and the connecting parts are correspondingly provided in plurality.

[0009] Preferably, a plurality of the connecting portions extend circumferentially and are connected to form a ring.

[0010] Preferably, a rotating part is provided on one of the shell and the base, and a limiting groove for accommodating at least part of the rotating part is provided on the other, the tooth groove is provided on the rotating part, and the rotating shaft passes through the limiting groove and the rotating part to rotatably connect the shell and the base.

[0011] Preferably, the groove wall of the limiting groove and the rotating shaft are positioned via a keyway structure, and the housing or the base is fixedly connected to the rotating shaft via screws or pins.

[0012] Preferably, the rotating portion is recessed on one side of the elastic portion to form a receiving groove for receiving at least part of the rotating shaft, a plurality of tooth grooves are circumferentially distributed on the side wall or bottom wall of the receiving groove, and the groove wall on one side of the limiting groove covers at least part of the opening of the receiving groove.

[0013] Preferably, the elastic portion is provided with a plurality of the convex teeth, and the plurality of the convex teeth are engaged in a plurality of the tooth grooves.

[0014] The utility model also provides an electric tool, comprising the lighting device described in any one of the above technical solutions.

[0015] After adopting the above technical solution, the utility model has the following beneficial effects.

[0016] 1. The utility model proposes a lighting device, which realizes the adjustable lighting range of the lighting device and the automatic locking of the lighting range of the lighting device after the adjustment by providing a plurality of tooth grooves circumferentially on one of the base and the shell, installing a rotating shaft on the other, and providing a convex tooth engaged with the tooth groove on the elastic part integrally formed on the rotating shaft, so as to meet the lighting needs of operators under different working conditions or of different heights; the elastic part is integrally formed on the rotating shaft, and compared with the design of the two being separated, the integrated structure does not need to consider the fixed connection method between the two, thereby simplifying the design of the product, and also reducing the additional labor, jig and other costs generated by the assembly of the two, thereby reducing the design and production costs of the lighting device.

[0017] 2. The elastic part includes a connecting part and a cantilever part. The connecting part is formed by radially extending from one end of the rotating shaft body. The cantilever part is arranged at the end of the connecting part away from the rotating shaft body. The convex tooth is arranged on the cantilever part. Such an arrangement allows a certain space between the convex tooth and the rotating shaft body or the connecting part, thereby providing a deformation space for the convex tooth to disengage, thereby avoiding interference with the rotating shaft body when the elastic part is deformed.

[0018] 3. A reinforcing rib is provided between the rotating shaft body and the connecting part. Such a configuration can improve the strength of the joint position of the rotating shaft body and the connecting part. When the convex teeth are disengaged due to the deformation of the connecting part, the bending strength of the connecting part can be increased, thereby improving the service life of the connecting part. When the convex teeth are disengaged due to the deformation of the cantilever part, the connecting part plays a role in supporting the cantilever part. If the strength of the connecting part is insufficient, the connecting part will compensate for the deformation of the cantilever part. In this way, the deformation degree of the connecting part increases due to the increase in the cantilever distance, thereby affecting the service life of the connecting part. By providing a reinforcing rib at the joint position of the rotating shaft body and the connecting part, excessive deformation of the connecting part when the convex teeth are disengaged can be avoided, thereby improving the service life of the elastic part.

[0019] 4. There are multiple cantilever parts, which are distributed circumferentially on the shaft body, and there are correspondingly multiple connecting parts. In this way, the multiple cantilever parts can support the shell or the base at multiple circumferential positions, thereby improving the stability of the shell or the base when rotating and locking.

[0020] 5. Multiple connecting parts extend circumferentially and are connected to form a ring. With this arrangement, the strength of the connecting part is better, thereby providing better support for the cantilever part. At the same time, it can also increase the bending strength of the connecting part and improve the service life of the connecting part.

[0021] 6. A rotating part is provided on one of the shell and the base, and a limiting groove for accommodating at least part of the rotating part is provided on the other. The tooth groove is provided on the rotating part, and the rotating shaft passes through the limiting groove and the rotating part to enable the shell and the base to be rotatably connected. With such an arrangement, the limiting groove can accommodate at least part of the rotating part, so that at least part of the position between the shell and the base can overlap, thereby reducing the outer dimensions of the lighting device and avoiding that an overly large lighting device is installed on the power tool and affects the use of the operator; at the same time, through the cooperation of the limiting groove and the rotating part, the shell and the base can rotate better.

[0022] 7. The groove wall of the limit groove and the rotating shaft are positioned through a keyway structure, and the shell or base is fixedly connected to the rotating shaft through screws or pins. With this arrangement, the rotating shaft can be better fixed to the shell or base, reducing the shaking of the shell or base when rotating relative to the rotating shaft, and improving the stability of the shell and the base when rotating. At the same time, the keyway structure is simple in design, and the mold and production costs are low, which can reduce the production cost of the lighting device.

[0023] 8. The rotating part is recessed on one side of the elastic part to form a receiving groove for receiving at least part of the rotating shaft. A plurality of tooth grooves are circumferentially distributed on the side wall of the receiving groove. The groove wall on one side of the limiting groove covers at least part of the opening of the receiving groove. With this arrangement, it is difficult for dust and debris from the outside to enter the receiving groove and contaminate the rotating shaft, thereby reducing the possibility that the rotating shaft and the tooth grooves cannot be well engaged, or the rotation performance between the shell and the base is poor.

[0024] 9. The elastic part is provided with a plurality of protruding teeth, and the plurality of protruding teeth are engaged in a plurality of tooth grooves. With such an arrangement, the elastic part and the tooth grooves can be better engaged, so that the stability is better when the base and the shell are in a locked state.

[0025] 10. The utility model also proposes an electric tool, comprising the lighting device described in any of the above technical solutions, so the electric tool has all the technical effects of the above technical solutions.

[0026] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of a lighting device in an embodiment of the utility model;

[0028] Figure 2 An exploded view of the lighting device in the embodiment of the utility model;

[0029] Figure 3 It is a schematic diagram of a housing in an embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of the base in the embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of a rotating shaft in an embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of another base in an embodiment of the utility model;

[0033] Figure 7 It is a schematic diagram of another rotating shaft in an embodiment of the utility model;

[0034] Reference numerals:

[0035] 100, housing, 110, limiting groove, 111, positioning groove;

[0036] 200, base, 210, rotating part, 211, receiving groove, 212, tooth groove, 220, clamping part;

[0037] 300, rotating shaft, 310, rotating shaft body, 311, flat key, 320, elastic part, 321, connecting part, 322, cantilever part, 323, convex teeth, 324, reinforcing ribs. DETAILED DESCRIPTION

[0038] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" and "several" mean two or more, unless otherwise clearly defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Embodiment 1:

[0043] like Figures 1 to 5 As shown, a lighting device proposed in an embodiment of the utility model includes a base 200 and a housing 100, wherein the housing 100 is rotatably mounted on the base 200, and the base 200 is mounted on the power tool. The housing 100 has a cavity, and a lighting component is installed in the cavity. The lighting device also includes a power supply device and a switch, wherein the power supply device can be a built-in battery or a power cord connected to the power tool, and the switch controls the opening and closing of the lighting component.

[0044] In this embodiment, a plurality of tooth grooves 212 are circumferentially provided on the base 200, a rotating shaft 300 is installed on the housing 100, and the base 200 and the housing 100 are rotatably connected through the rotating shaft 300. The rotating shaft 300 includes a rotating shaft body 310 and an elastic portion 320 integrally formed on the rotating shaft body 310, and a convex tooth 323 is provided at the free end of the elastic portion 320. The convex tooth 323 engages with the tooth groove 212 to lock the housing 100 and the base 200, thereby fixing the lighting range of the lighting device. The elastic portion 320 is deformed so that the convex tooth 323 is released from the meshing tooth groove 212, thereby releasing the lock of the housing 100 and the base 200, and is used to adjust the lighting range of the lighting device.

[0045] Specifically, when the operator needs to adjust the lighting range of the lighting device, the housing 100 is rotated with force, and the force is transmitted to the protruding teeth 323 and the tooth groove 212, so that the elastic part 320 is deformed, and the deformation of the elastic part 320 causes the protruding teeth 323 to disengage from the tooth groove 212 to release the meshing state of the two. At this time, the housing 100 rotates relative to the base 200 to change the lighting range of the lighting device. When the operator stops rotating the housing 100, the force between the protruding teeth 323 and the tooth groove 212 disappears, the elastic part 320 is reset, the protruding teeth 323 and the tooth groove 212 resume the meshing state, and the housing 100 and the base 200 resume the locking state.

[0046] It is understandable that in some other embodiments, a plurality of tooth grooves 212 may be circumferentially provided on the housing 100 , and the rotating shaft 300 may be mounted on the base 200 .

[0047] By providing a plurality of tooth grooves 212 circumferentially on one of the base 200 and the shell 100, and installing a rotating shaft 300 on the other, and providing a convex tooth 323 meshing with the tooth groove 212 on the elastic portion 320 integrally formed on the rotating shaft 300, the lighting range of the lighting device can be adjusted, and the lighting range of the lighting device can be automatically locked after the adjustment is completed, thereby meeting the lighting needs of operators under different working conditions or of different heights; the elastic portion 320 is integrally formed on the rotating shaft 300. Compared with the design in which the two are separated, the integrated structure does not need to consider the fixed connection method between the two, thereby simplifying the design of the product, and also reducing the additional labor, jig and other costs generated by the assembly of the two, thereby reducing the design and production costs of the lighting device.

[0048] In a preferred embodiment, Figure 5 As shown, a plurality of protruding teeth 323 are disposed on the elastic portion 320 , and the plurality of protruding teeth 323 are engaged in the plurality of tooth grooves 212 .

[0049] By meshing the plurality of protruding teeth 323 with the plurality of tooth grooves 212 , the elastic portion 320 and the tooth grooves 212 can be better meshed, so that the base 200 and the housing 100 have better stability when in a locked state.

[0050] Embodiment 2:

[0051] Based on the first embodiment, Figures 1 to 5 As shown, in this embodiment, the base 200 is provided with a rotating portion 210, the housing 100 is provided with a limiting groove 110 that can accommodate at least part of the rotating portion 210, and the rotating shaft 300 is installed on the housing 100, and the rotating shaft 300 passes through the rotating portion 210 to rotatably connect the housing 100 and the base 200. Among them, a plurality of tooth grooves 212 are provided on the rotating portion 210.

[0052] It is understandable that in some other embodiments, the housing 100 is provided with a rotating portion 210 , the base 200 is provided with a limiting groove 110 , the rotating shaft 300 is mounted on the base 200 , and a plurality of tooth grooves 212 are provided on the housing 100 .

[0053] With such a configuration, the limiting groove 110 can accommodate at least a portion of the rotating part 210, so that at least a portion of the shell 100 and the base 200 can overlap, thereby reducing the outer dimensions of the lighting device and preventing an overly large lighting device from being installed on the power tool and affecting the operator's use; at the same time, through the cooperation between the limiting groove 110 and the rotating part 210, the shell 100 and the base 200 can rotate better.

[0054] In a preferred embodiment, Figure 3 , Figure 5 As shown, the groove wall of the limiting groove 110 and the rotating shaft 300 are positioned by a key groove structure, so that the rotating shaft 300 is positioned on the housing 100. For example, the groove walls on both sides of the limiting groove 110 are provided with positioning grooves 111, and the two ends of the rotating shaft body 310 are provided with flat keys 311, and the flat keys 311 cooperate with the positioning grooves 111 to position the rotating shaft 300 and limit the rotation of the rotating shaft 300 relative to the housing 100. The housing 100 and the rotating shaft 300 are fixed by screws, so as to limit the radial separation of the rotating shaft 300 from the housing 100. When installing the lighting device, the operator first installs the rotating shaft 300 on the rotating part 210, and then installs the rotating part 210 into the limiting groove 110, so as to position the rotating shaft 300 on the housing 100, and the housing 100 and the rotating shaft 300 are fixedly connected by screws or pins. Among them, the rotating shaft 300 is provided with a connecting hole, the screw is connected to the connecting hole by threading, and the pin is connected to the connecting hole by tight fitting installation.

[0055] It is understandable that both ends of the rotating shaft body 310 may also be provided with semicircular keys, wedge keys, splines, etc., and the positioning groove 111 matches the shape of the above-mentioned keys.

[0056] In some other embodiments, keys may be provided on the groove walls on both sides of the limiting groove 110 , and positioning grooves 111 matching the key structure shape may be provided at both ends of the rotating shaft 300 .

[0057] In some other embodiments, the limiting groove 110 is provided on the base 200, and the rotating shaft 300 and the base 200 are positioned by a keyway structure and fixedly connected by screws.

[0058] With such a configuration, the shaft 300 can be better fixed to the shell 100 or the base 200, reducing the shaking of the shell 100 or the base 200 when rotating relative to the shaft 300, and improving the stability of the shell 100 and the base 200 when rotating. At the same time, the keyway structure is simple in design, and the mold and production costs are low, thereby reducing the production cost of the lighting device.

[0059] In another preferred embodiment, in combination Figure 4 The rotating portion 210 is concave on one side facing the elastic portion 320 to form a receiving groove 211 for receiving at least part of the rotating shaft 300 . A plurality of tooth grooves 212 are circumferentially distributed on the side wall of the receiving groove 211 . The groove wall on one side of the limiting groove 110 covers at least part of the opening of the receiving groove 211 .

[0060] In another preferred embodiment, in combination Figure 6 The rotating portion 210 is concave on one side facing the elastic portion 320 to form a receiving groove 211 for receiving at least part of the rotating shaft 300 , and a plurality of tooth grooves 212 are circumferentially distributed on the bottom wall of the receiving groove 211 , and the groove wall on one side of the limiting groove 110 covers at least part of the opening of the receiving groove 211 .

[0061] With such a configuration, dust and debris from the outside are difficult to enter the receiving groove 211 and contaminate the shaft 300, thereby reducing the possibility that dust and debris are contaminated on the shaft 300 and cause the shaft 300 to not mesh well with the tooth groove 212, or the rotation performance between the shell 100 and the base 200 to be poor.

[0062] For other contents not described in this embodiment, please refer to Embodiment 1.

[0063] Embodiment three:

[0064] Based on the first and second embodiments, Figure 5 As shown, in this embodiment, the elastic portion 320 includes a connecting portion 321 and a cantilever portion 322 . The connecting portion 321 is formed by radially extending from one end of the shaft body 310 . The cantilever portion 322 is disposed at one end of the connecting portion 321 away from the shaft body 310 . The protruding tooth 323 is disposed on the cantilever portion 322 .

[0065] In this embodiment, a rotating portion 210 is provided on the base 200, and the rotating portion 210 is concave on one side facing the elastic portion 320 to form a receiving groove 211, and a plurality of tooth grooves 212 are circumferentially distributed on the side wall of the receiving groove 211, and the convex teeth 323 are engaged with the tooth grooves 212. When the force is transmitted to the convex teeth 323 and the tooth grooves 212, the cantilever portion 322 is deformed, so that the convex teeth 323 disengage from the tooth grooves 212 to release the engagement between the two.

[0066] In some other embodiments, combined with Figure 6 , Figure 7 A rotating portion 210 is provided on the base 200, and the rotating portion 210 is concave on one side facing the elastic portion 320 to form a receiving groove 211. A plurality of tooth grooves 212 are circumferentially distributed on the bottom wall of the receiving groove 211. The convex teeth 323 are engaged with the tooth grooves 212. When the force is transmitted to the convex teeth 323 and the tooth grooves 212, the cantilever portion 322 transmits the force to the connecting portion 321, and the connecting portion 321 is deformed, so that the convex teeth 323 are disengaged from the tooth grooves 212 to release the meshing state of the two.

[0067] In some other embodiments, a rotating portion 210 is provided on the base 200, and a plurality of tooth grooves 212 are circumferentially distributed on the outer wall of the rotating portion 210, and the protruding teeth 323 are engaged with the tooth grooves 212. When the force is transmitted to the protruding teeth 323 and the tooth grooves 212, the cantilever portion 322 is deformed, so that the protruding teeth 323 are disengaged from the tooth grooves 212 to release the engagement between the two.

[0068] It is understandable that the rotating portion 210 may also be disposed on the housing 100 .

[0069] Such arrangement allows a certain space between the protruding tooth 323 and the shaft body 310 or the connecting portion 321 , thereby providing deformation space for the protruding tooth 323 to release the meshing, thereby avoiding interference between the elastic portion 320 and the shaft body 310 when deforming.

[0070] The joint position of the cantilever portion 322 and the connecting portion 321 is chamfered, so as to increase the bending strength of the joint position of the two and increase the service life of the elastic portion 320.

[0071] In a preferred embodiment, Figure 5 As shown, a reinforcing rib 324 is provided between the rotating shaft body 310 and the connecting portion 321 .

[0072] Such an arrangement can improve the strength of the joint position between the shaft body 310 and the connecting part 321. When the convex tooth 323 is disengaged due to the deformation of the connecting part 321, the bending strength of the connecting part 321 can be increased, thereby improving the service life of the connecting part 321. When the convex tooth 323 is disengaged due to the deformation of the cantilever part 322, the connecting part 321 plays a role in supporting the cantilever part 322. If the strength of the connecting part 321 is insufficient, the connecting part 321 will compensate for the deformation of the cantilever part 322. In this way, the deformation of the connecting part 321 increases due to the increase in the cantilever distance, thereby affecting the service life of the connecting part 321. By providing a reinforcing rib 324 at the joint position between the shaft body 310 and the connecting part 321, excessive deformation of the connecting part 321 when the convex tooth 323 is disengaged can be avoided, thereby improving the service life of the elastic part 320.

[0073] In another preferred embodiment, a plurality of cantilever portions 322 are provided, and the plurality of cantilever portions 322 are circumferentially distributed on the shaft body 310 , and a plurality of connecting portions 321 are provided accordingly.

[0074] With such arrangement, the plurality of cantilever portions 322 can support the housing 100 or the base 200 at a plurality of circumferential positions, thereby improving the stability of the housing 100 or the base 200 when rotating and locking.

[0075] In this embodiment, more preferably, a plurality of connecting parts 321 extend circumferentially and are connected to form a ring. In this way, the strength of the connecting part 321 is better, so that the support for the cantilever part 322 is better, and at the same time, the bending strength of the connecting part 321 can be increased, and the service life of the connecting part 321 can be improved.

[0076] For other parts not described in this embodiment, please refer to Embodiments 1 and 2.

[0077] Embodiment 4:

[0078] The utility model also provides an electric tool, which includes the lighting device described in any technical solution of embodiments 1 to 3.

[0079] The power tool may be a garden power tool or a handheld power tool. The garden power tool may be a lawn mower, a snow sweeper, etc. The handheld power tool may be an electric drill, an electric hammer, a cutter, an angle grinder, an electric grinder, an electric saw, etc.

[0080] The base 200 includes a clamping portion 220 . A mounting portion is provided on the electric tool. The clamping portion 220 is clamped on the mounting portion and fixed by screws.

[0081] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A lighting device, characterized in that: The invention comprises a base and a shell, wherein the base is mounted on an electric tool, the shell has a cavity, a lighting component is mounted in the cavity, a plurality of teeth are circumferentially arranged on one of the shell and the base, a rotating shaft is mounted on the other, the shell and the base are rotatably connected via the rotating shaft, the rotating shaft comprises a rotating shaft body and an elastic part integrally formed on the rotating shaft body, a convex tooth is arranged at the free end of the elastic part, the convex tooth engages with the tooth groove to lock the shell and the base, and the elastic part is deformed to disengage the convex tooth from the tooth groove to unlock the lock.

2. A lighting device according to claim 1, characterized in that: The elastic part includes a connecting part and a cantilever part, the connecting part is formed by radially extending from one end of the rotating shaft body, the cantilever part is arranged at one end of the connecting part away from the rotating shaft body, and the protruding teeth are arranged on the cantilever part.

3. A lighting device as claimed in claim 2, characterized in that: A reinforcing rib is provided between the rotating shaft body and the connecting portion.

4. A lighting device as claimed in claim 2, characterized in that: There are a plurality of cantilever parts, and the plurality of cantilever parts are circumferentially distributed on the shaft body, and there are a plurality of connecting parts correspondingly.

5. A lighting device as claimed in claim 4, characterized in that: The plurality of connecting parts extend circumferentially and are connected to form a ring.

6. The lighting device according to claim 1, characterized in that: A rotating part is provided on one of the shell and the base, and a limiting groove for accommodating at least part of the rotating part is provided on the other. The tooth groove is provided on the rotating part, and the rotating shaft passes through the limiting groove and the rotating part to rotatably connect the shell and the base.

7. A lighting device according to claim 6, characterized in that: The groove wall of the limiting groove and the rotating shaft are positioned via a keyway structure, and the housing or the base is fixedly connected to the rotating shaft via screws or pins.

8. A lighting device as claimed in claim 6, characterized in that: The rotating portion is recessed on one side of the elastic portion to form a receiving groove for receiving at least part of the rotating shaft, and a plurality of tooth grooves are circumferentially distributed on the side wall or bottom wall of the receiving groove, and the groove wall on one side of the limiting groove covers at least part of the opening of the receiving groove.

9. The lighting device according to claim 1, characterized in that: The elastic part is provided with a plurality of protruding teeth, and the plurality of protruding teeth are engaged in a plurality of tooth grooves.

10. An electric tool, characterized in that: The invention comprises the lighting device according to any one of claims 1 to 9.

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