CN215470916U - Electric tool and connecting piece - Google Patents
Electric tool and connecting piece Download PDFInfo
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- CN215470916U CN215470916U CN202121605908.7U CN202121605908U CN215470916U CN 215470916 U CN215470916 U CN 215470916U CN 202121605908 U CN202121605908 U CN 202121605908U CN 215470916 U CN215470916 U CN 215470916U
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- connecting portion
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Abstract
The utility model relates to the technical field of electric tools, and discloses an electric tool and a connecting piece, which comprise: an output shaft for connection to a tool; the shell comprises a main shell part and a handle, wherein the upper ends of the main shell part and the handle are respectively provided with a first connecting part and a second connecting part; the motor is arranged in the shell and used for driving the output shaft; the connecting piece, including first end and second end, the second connecting portion are connected to first end, the second end with first connecting portion swing joint. The electric tool is simple in structure and good in damping effect. The connecting piece is simple in structure, and good in damping effect after being installed on the electric tool.
Description
Technical Field
The utility model relates to the technical field of electric tools, in particular to an electric tool and a connecting piece.
Background
Most hand-held electric tools utilize a motor to output rotary or linear motion, and certain vibration can be generated between a machine shell or parts in the machine shell, such as an electric drill, an impact drill, an electric hammer and the like. Use the electric hammer as an example, the electric hammer relies on the hammering to carry out the instrument of removing to working medium, generally includes the shell body and grips the shell, and operating personnel holds the shell and carries out the operation, if the reaction force that the electric hammer hammering process produced is mostly used in human words, easily causes to grip the finger and produces phenomenons such as numb, whitish. Among the prior art, in order to reduce the damping sense of the portion of gripping, be provided with damper between shell body and the shell of gripping, but existing damper's structure is complicated, and the shock attenuation effect is relatively poor. Therefore, a need exists for a power tool and a connector that solve the above problems.
SUMMERY OF THE UTILITY MODEL
One object of the present invention is to provide a power tool, and another object of the present invention is to provide a connector.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a power tool, comprising:
an output shaft for connection to a tool;
the shell comprises a main shell part and a handle, wherein the upper ends of the main shell part and the handle are respectively provided with a first connecting part and a second connecting part;
the motor is arranged in the shell and used for driving the output shaft;
the connecting piece, including first end and second end, the second connecting portion are connected to first end, the second end with first connecting portion swing joint.
Optionally, the connecting member includes a body portion, and a sliding portion and a fixing portion that are disposed at two ends of the body portion, the fixing portion is connected to the second connecting portion, the body portion is disposed between the first connecting portion and the second connecting portion, and the first connecting portion is movably connected to the sliding portion.
Optionally, the sliding portion includes a stopper plate and a sliding groove formed between the body portion and the stopper plate, and the first connecting portion is movable along the sliding groove between the stopper plate and the body portion.
Optionally, the first connection portion comprises:
the sliding part is arranged in the accommodating cavity at least partially;
the bulge is arranged on the side wall of the accommodating cavity and can slide along the sliding groove.
Optionally, the protruding portion is provided with a through hole, the sliding portion passes through the through hole, the stopper plate is disposed on a side of the through hole away from the body portion, the diameter of the through hole is smaller than that of the stopper plate, and the diameter of the through hole is smaller than that of the body portion.
Optionally, an opening of the casing is provided with a limiting rib, so that the diameter of the opening is smaller than or equal to that of the accommodating cavity.
Optionally, a gap is provided between the opening and the circumferential surface of the connector.
Optionally, the second connecting portion is provided with a clamping groove, the first end of the connecting piece is provided with a clamping piece in a corresponding shape, and the clamping piece is connected with the clamping groove.
Optionally, the handle is capable of elastic deformation.
A connector for mounting on a power tool, the power tool comprising:
the shell comprises a main shell part and a handle, wherein the upper ends of the main shell part and the handle are respectively provided with a first connecting part and a second connecting part;
the connecting piece comprises a first end and a second end, the first end is connected with the second connecting portion, and the second end is movably connected with the first connecting portion.
The utility model has the beneficial effects that:
the electric tool has better shock absorption effect and use hand feeling.
Drawings
Fig. 1 is a schematic structural view of an electric hammer according to an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view of an electric hammer according to an embodiment of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is a schematic view of a partially exploded structure of a housing of an electric hammer according to an embodiment of the present invention;
fig. 5 is a longitudinal sectional view of an electric hammer according to another embodiment of the present invention.
In the figure:
1-a main housing portion; 11-a first connection; 111-a casing; 112-a receiving cavity; 113-a boss; 1131-through hole; 114-a limiting rib; 115-gap;
2-a handle; 21-a second connection; 211-card slot; 2111-baffle shell; 2112-base plate; 2113-mounting holes;
3-a connector; 31-a body portion; 32-a fixed part; 33-a sliding part; 331-a stopper plate; 332-a chute; 333-support sheet;
4-an output shaft;
5-motor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides a connecting piece and an electric tool, as shown in fig. 1 and fig. 2, the electric tool comprises a housing, an output shaft 4 and a motor 5, the motor 5 is arranged in the housing, the output shaft 4 is at least partially arranged in the housing and is used for connecting a tool, wherein the tool can be a hammer drill or a percussion drill, etc., and the motor 5 drives the output shaft 4 to move so as to drive the tool to perform work. Specifically, the casing includes main casing portion 1 and handle 2, and motor 5 and output shaft 4 are installed in main casing portion 1, and handle 2 is used for gripping, and handle 2 is C type structure, and the middle vertical portion of C type structure supplies operating personnel to grip. One end of the handle 2 is a second connecting portion 21, and the other end is connected to the main housing 1 except the first connecting portion 11. Preferably, as shown in fig. 2, the power tool further comprises a connecting member 3, the connecting member 3 comprises a first end and a second end, the first end of the connecting member 3 is connected with the second connecting portion 21, and the second end of the connecting member 3 can move relative to the first connecting portion 11.
The handle 2 comprises a connecting part 22, the handle 2 is connected with the main casing part 1 through the connecting part 22, and a space for installing a battery pack (not shown in the figure) is arranged below the connecting part 22. In the present embodiment, the handle 2 is elastically deformable, and further, the handle 2 is elastically deformed between the coupling portion 22 and the main housing portion 1. The outer shell of the handle 2 may be made of a tough hard material, and an elastic device may be provided in the outer shell of the handle 2. Specifically, the elastic device is an elastic sheet which is arranged along the vertical direction, and two ends of the elastic sheet are fixed on the inner wall of the shell. During use by a user, the intermediate portion of the handle 2 is held such that the handle 2 is visually stationary and the connecting portion 22 and the main housing portion 1 move relative to each other.
The electric tool of this embodiment, when motor 5 drive output shaft 4 work and make first connecting portion 11 produce vibrations, first connecting portion 11 can remove certain distance for the second end of connecting piece 3 earlier this moment, allow first connecting portion 11 to have certain vibrations scope promptly, first connecting portion 11 can carry out the deceleration by oneself under the limiting displacement of other structures of main casing body portion 1 earlier in this process, after the terminal surface butt of first connecting portion 11 and connecting piece 3, connecting piece 3 rethread warp and carry out further speed reduction and shake to first connecting portion 11 of shell, thereby make the impact force that connecting piece 3 received at the shock attenuation in-process reduce, and then the impact force that the operator that makes handle 2 grip received reduces, the electric tool shock attenuation of this embodiment is effectual, and is simple in structure, high durability and convenient installation. It is understood that in other embodiments, the connecting member 3 may also have a second end connected to the first connecting portion 11, and the first end can move relative to the second connecting portion 21, and this arrangement is consistent with the working principle and the shock absorbing effect of this embodiment, and will not be described herein again.
Specifically, the connecting member 3 is a cylindrical structure as a whole, and the axial direction of the connecting member 3 is parallel to the direction of the sliding groove 332 and the direction of the output shaft 4. Further, the connecting member 3 may be made of rubber or other materials with elastic deformation capability, or may be made of hard plastic materials, preferably integrally formed, and is not limited herein. In the present embodiment, the connecting member 3 is made of a hard material, and since the handle 2 has a deformation capability, the connecting member 3 does not mainly provide an elastic damping effect, but mainly plays a role in guiding the movement of the handle. The connecting piece 3 is integrally arranged along a first direction, the first direction is parallel to the output shaft 4 (including coaxial) or has a smaller included angle, the included angle is less than or equal to 20 degrees, the movement direction of the handle 2 is completely consistent with or close to the vibration direction, and therefore the shock absorption effect is better. In other embodiments, when the handle 2 can not be elastically deformed, the connecting member 3 can be made of an elastic material, specifically, a threaded structure is disposed on the outer surface of the connecting member 3, the threaded structure is mainly disposed on the body portion 31, and the threaded structure can improve the deformability of the connecting member 3, so that a good damping effect can be ensured. The main body 31 may be made of a different material from other parts, for example, the main body 31 may be made of a material having a certain elasticity, and other parts may be made of a hard material.
Preferably, as shown in fig. 2 and 3, the connecting member 3 includes a body portion 31, and a sliding portion 33 and a fixing portion 32 provided at both ends of the body portion 31, the fixing portion 32 is connected to the second connecting portion 21, the body portion 31 is provided between the first connecting portion 11 and the second connecting portion 21, and the first connecting portion 11 is movably connected to the sliding portion 33. In the present embodiment, the sliding portion 33 may provide a guiding function for the movement of the handle 2. The cooperation of sliding part 33 and first connecting portion 11 can lead spacing to the vibrations direction of first connecting portion 11, avoids taking place the dislocation of other directions between main casing portion 1 and the handle 2 and removes and lead to the damage of other structures. In other embodiments where the handle 2 is fixed, the first connecting portion 11 can move along the sliding portion 33 when the first connecting portion 11 is subjected to a shock, and the body portion 31 can be compressed to further absorb the shock when the first connecting portion 11 abuts against the end surface of the body portion 31 near the sliding portion 33.
Specifically, as shown in fig. 3, the sliding portion 33 includes a stopper plate 331 and a slide groove 332 formed between the body portion 31 and the stopper plate 331, and the first connecting portion 11 is movable along the slide groove 332 between the stopper plate 331 and the body portion 31. The stop plates 331 and the body portion 31 are respectively located at two ends of the sliding groove 332 to respectively limit the first connecting portion 11, so as to ensure that the first connecting portion 11 vibrates within a reasonable movement range. Specifically, in the present embodiment, the length of the sliding slot 332 ranges from 0mm to 20mm, preferably from 0mm to 7mm, and in other embodiments, the length of the sliding slot 332 may be selected according to the actual size of the electric tool, which is not specifically limited herein.
Preferably, as shown in fig. 3, the first connecting portion 11 includes a sleeve 111 and a protrusion 113, wherein the sleeve 111 forms an accommodating cavity 112 having an opening, the sliding portion 33 is at least partially disposed in the accommodating cavity 112, the protrusion 113 is disposed on a sidewall of the accommodating cavity 112, and the protrusion 113 can slide along the sliding groove 332. The matching of the protruding portion 113 and the sliding groove 332 can ensure the accuracy of the relative sliding direction of the first connecting portion 11 and the connecting member 3. In this embodiment, when the electric tool is in an inoperative state, that is, the first connecting portion 11 is in a stationary state, one end of the body portion 31 close to the stop plate 331 is accommodated in the accommodating cavity 112 in the housing 111, and during the vibration of the first connecting portion 11, the body portion 31 extends into the accommodating cavity 112 more, that is, the sliding groove 332 is always located in the accommodating cavity 112, so that dust or external impurities can be prevented from falling into the sliding groove 332, and the first connecting portion 11 and the sliding groove 332 can always slide smoothly. Preferably, as shown in fig. 3, the length of the main body 31 is equal to or greater than the length of the sliding groove 332, so that collision and interference between the first connecting portion 11 and the second connecting portion 21 can be avoided when the first connecting portion 11 slides relative to the sliding groove 332. In other embodiments, when the power tool is not operated, that is, when the first connecting portion 11 is in a static state, the body portion 31 is completely located outside the casing 111, and part of the sliding portion 33 is also located outside the casing 111, only during the relative movement between the first connecting portion 11 and the connecting element 3, part of the body portion 31 can extend into the accommodating cavity 112, and the arrangement is selected according to actual needs, and is not limited herein.
Specifically, as shown in fig. 3 and 4, the protruding portion 113 is provided with a through hole 1131, the sliding portion 33 passes through the through hole 1131, the stopper plate 331 is provided on a side of the through hole 1131 away from the body portion 31, a diameter of the through hole 1131 is smaller than a diameter of the stopper plate 331, and the diameter of the through hole 1131 is smaller than the diameter of the body portion 31. Thereby ensuring that the protruding portion 113 can slide along the sliding groove 332 and can respectively abut against the end surface of the body portion 31 and the stop plate 331 for limiting. It should be noted that, in the present embodiment, the diameter of the "diameter of the stopper plate 331" or the "diameter of the through hole 1131" merely represents the size of the maximum profile of the corresponding structure, and is not limited to the cross section of the corresponding structure being circular.
Further, as shown in fig. 3 and 4, the connecting member 3 further includes a supporting piece 333, the supporting piece 333 is connected between the body portion 31 and the sliding portion 33 to form a sliding slot 332, and the supporting piece 333 is inserted into the through hole 1131 so that the stopper plate 331 and the body portion 31 are respectively located at two sides of the through hole 1131. In this embodiment, the supporting sheet 333 includes two rib plates arranged in a crossing manner, the rib plates divide the space between the stopping sheet 331 and the main body 31 into four sliding grooves 332, and correspondingly, the protruding portion 113 is also divided into four parts by the through hole 1131, each part can slide in one sliding groove 332, on one hand, the four sliding grooves 332 are respectively matched with the four parts of the protruding portion 113, so that the relative movement direction of the first connecting portion 11 and the connecting member 3 is more accurate and stable; on the other hand, the rib plate also plays a role of reinforcement, so that the structural strength of the connecting piece 3 is higher, and the structural connecting piece 3 is not easy to damage in the process that the body part 31 and the stop plate 331 limit the convex part 113. Of course, in other embodiments, the support sheet 333 is composed of only one rib or a plurality of ribs arranged in a cross manner, or is a cylindrical structure, and is selected according to actual needs, which is not limited herein.
Preferably, as shown in fig. 3 and 4, the opening of the casing 111 is provided with a limiting rib 114, so that the diameter of the opening is smaller than or equal to the diameter of the accommodating chamber 112. The limiting rib 114 can limit the outer peripheral surface of the connecting piece 3, so that the relative movement between the connecting piece 3 and the first connecting part 11 is further guided, and the accuracy of the relative movement direction of the connecting piece 3 and the first connecting part is ensured. Specifically, a gap 115 is arranged between the limiting rib 114 and the circumferential surface of the connecting member 3, and the arrangement of the gap 115 can avoid friction or jamming in the relative movement process of the connecting member 3 and the first connecting portion 11, so as to ensure the fluency of the relative movement process of the two. In this embodiment, the entire sliding portion 33 is always completely located in the accommodating cavity 112, that is, the gap 115 is located between the limiting rib 114 and the outer periphery of the main body portion 31, the diameter of the main body portion 31 in this embodiment may be larger than, smaller than or equal to the diameter of the sliding portion 33, when the diameter of the main body portion 31 is smaller than the diameter of the sliding portion 33, it is necessary to ensure that the diameter of the sliding portion 33 is smaller than the diameter of the accommodating cavity 112, and further ensure that the relative movement between the connecting member 3 and the first connecting portion 11 is smooth. In other embodiments, when the first connecting portion 11 is in a static state, one end of the sliding portion 33 close to the main body 31 is located outside the accommodating cavity 112 (not shown), and during a vibration process of the first connecting portion 11, both the main body 31 and the sliding portion 33 of the connecting member 3 pass through the opening of the limiting rib 114, at this time, it is required to ensure that the opening of the limiting rib 114 is slightly larger than one of the main body 31 and the sliding portion 33 with a larger diameter, and the gap 115 may exist between the limiting rib 114 and the main body 31, and may also be located between the limiting rib 114 and the sliding portion 33.
Preferably, as shown in fig. 3 and 4, the second connecting portion 21 is provided with a locking groove 211, and the first end of the connecting member 3 is provided with a correspondingly shaped locking piece, which is connected with the locking groove 211. Specifically, draw-in groove 211 is T type draw-in groove, and the first end of connecting piece 3 is provided with T type platform, and fixed part 32 is T type platform promptly, and T type platform joint is in T type draw-in groove to guarantee that the location is accurate between the first end of connecting piece 3 and the second connecting portion 21, be connected reliably, and needn' T connect simple structure with the help of other fasteners. Specifically, a bottom plate 2112 and a baffle shell 2111 are arranged on the second connecting portion 21, a mounting hole 2113 is arranged on one side of the baffle shell 2111 facing the body portion 31, the baffle shell 2111 is buckled on the bottom plate 2112 to form a clamping groove 211, and one end of the clamping piece is positioned in the clamping groove 211, and the other end of the clamping piece penetrates through the mounting hole 2113 to be connected with the body portion 31.
In this embodiment, the casing is formed by two half shell locks, then corresponds, and draw-in groove 211 is formed after the structure lock on two half shells to make the fastener can conveniently install in draw-in groove 211, and likewise, cover 111 and bellying 113 also all are formed by the structure lock on two half shells, thereby guarantee that sliding part 33 can conveniently wear to establish through-hole 1131, thereby make the casing more convenient with being connected of connecting piece 3.
In another embodiment of the present invention, the power tool further includes a heat dissipation structure, as shown in fig. 5, wherein the same or similar structures as those in the previous embodiment are denoted by the same reference numerals, and only the differences from the previous embodiment are described herein. In this embodiment, a fan 6 is disposed above the motor 5, and a circuit board assembly 7 is disposed below the motor 5. Specifically, the fan 6 and the motor 5 are coaxially disposed. The circuit board assembly 7 is provided with a heat sink 70, i.e. the heat sink 70 is arranged between the circuit board and the motor 5. The circuit board assembly 70 is located at the lower end of the main housing part 1, i.e., the end remote from the first connecting part 11, and the end forms a cavity for accommodating the circuit board assembly 70, which is lower in height than the handle 2 in the up-down direction, so that the battery pack is mounted in the space between the cavity and the connecting part 22. The surface of the connecting portion 22 is provided with a first heat dissipation opening 221, and preferably, the first heat dissipation opening 221 is provided on the upper surface of the connecting portion 22. The main casing portion 1 is provided with a second heat dissipation opening 12, the second heat dissipation opening 12 is disposed near the fan 6, and specifically, the second heat dissipation opening 12 may be disposed along a circumferential direction or a radial direction of the main casing portion 1. Further, according to the installation direction of the fan, the first heat dissipation port 221 serves as an air inlet, the second heat dissipation port 12 serves as an air outlet, and the airflow enters from the connection portion 22, passes through the circuit board assembly 7, passes through the gap between the motor 5 and the housing, and flows out from the main housing portion 1. The heat dissipation structure can simultaneously dissipate heat for the circuit board assembly 7 and the motor 5, and because no more elements are arranged in the connecting part 22, the heat dissipation structure has a cavity with a larger range, and can ensure that the entering airflow has better flow velocity and flow, and the heat dissipation effect is good.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the utility model and are not to be construed as limitations of the embodiments of the present invention, but may be modified in various embodiments and applications by those skilled in the art according to the spirit of the present invention, and the content of the present description should not be construed as a limitation of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An electric power tool, characterized by comprising:
an output shaft (4) for connection to a tool;
the shell comprises a main shell part (1) and a handle (2), wherein the upper ends of the main shell part (1) and the handle (2) are respectively provided with a first connecting part (11) and a second connecting part (21);
the motor (5) is arranged in the shell and used for driving the output shaft (4);
the connecting piece (3) comprises a first end and a second end, the first end is connected with the second connecting portion (21), and the second end is movably connected with the first connecting portion (11).
2. The electric tool according to claim 1, wherein the connector (3) includes a body portion (31), and a sliding portion (33) and a fixing portion (32) provided at both ends of the body portion (31), the fixing portion (32) being connected to the second connecting portion (21), the body portion (31) being provided between the first connecting portion (11) and the second connecting portion (21), the first connecting portion (11) being movably connected to the sliding portion (33).
3. The electric power tool according to claim 2, wherein the sliding portion (33) includes a stopper plate (331) and a slide groove (332) formed between the body portion (31) and the stopper plate (331), and the first connecting portion (11) is movable along the slide groove (332) between the stopper plate (331) and the body portion (31).
4. The power tool according to claim 3, characterized in that the first connection portion (11) comprises:
a casing (111) forming an accommodation chamber (112) having an opening, the sliding portion (33) being at least partially provided in the accommodation chamber (112);
the protruding portion (113) is arranged on the side wall of the accommodating cavity (112), and the protruding portion (113) can slide along the sliding groove (332).
5. The electric power tool according to claim 4, wherein the protruding portion (113) is provided with a through hole (1131), the sliding portion (33) passes through the through hole (1131), the stopper plate (331) is provided on a side of the through hole (1131) away from the body portion (31), a diameter of the through hole (1131) is smaller than a diameter of the stopper plate (331), and a diameter of the through hole (1131) is smaller than a diameter of the body portion (31).
6. The electric tool according to claim 4, characterized in that a limiting rib (114) is provided at the opening of the housing (111) so that the diameter of the opening is smaller than or equal to the diameter of the accommodating cavity (112).
7. The power tool according to claim 4, characterized in that a gap (115) is provided between the opening and the circumferential surface of the coupling member (3).
8. The power tool according to claim 1, characterized in that the second connecting part (21) is provided with a catch (211), and the first end of the connecting part (3) is provided with a correspondingly shaped catch, which is connected with the catch (211).
9. A power tool according to claim 3, characterized in that the handle (2) is elastically deformable.
10. A connector (3) mounted on a power tool, the power tool comprising:
the shell comprises a main shell part (1) and a handle (2), wherein the upper ends of the main shell part (1) and the handle (2) are respectively provided with a first connecting part (11) and a second connecting part (21);
the connecting piece (3) is characterized by comprising a first end and a second end, wherein the first end is connected with the second connecting part (21), and the second end is movably connected with the first connecting part (11).
Priority Applications (1)
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CN202121605908.7U CN215470916U (en) | 2021-07-15 | 2021-07-15 | Electric tool and connecting piece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202121605908.7U CN215470916U (en) | 2021-07-15 | 2021-07-15 | Electric tool and connecting piece |
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CN215470916U true CN215470916U (en) | 2022-01-11 |
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CN202121605908.7U Active CN215470916U (en) | 2021-07-15 | 2021-07-15 | Electric tool and connecting piece |
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2021
- 2021-07-15 CN CN202121605908.7U patent/CN215470916U/en active Active
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Address after: No. 529, Jiangjun Avenue, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee after: Nanjing Quanfeng Technology Co.,Ltd. Address before: No. 529, Jiangjun Avenue, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee before: NANJING CHERVON INDUSTRY Co.,Ltd. |