CN216698603U - Electric tool - Google Patents

Abstract

The utility model discloses an electric tool, comprising: an output member; a motor; a housing for housing the motor; wherein, the casing includes: the battery pack accommodating part is provided with a first battery pack accommodating cavity and a guide structure for guiding the battery pack to be inserted into the first battery pack accommodating cavity along a first linear direction; the battery pack accommodating part includes: a first sidewall provided at a left side of the battery pack when the battery pack is coupled to the first battery pack receiving cavity; a second sidewall opposite the first sidewall; a third sidewall provided at an upper side of the battery pack when the battery pack is coupled to the first battery pack receiving cavity; the side wall is also provided with an opening which penetrates through the first battery pack accommodating cavity along a second straight line direction perpendicular to the first straight line; the opening is still opened towards the direction of keeping away from the diapire along first rectilinear direction, and the ratio of the size of opening along first rectilinear direction and the size of first battery package holding chamber in first rectilinear direction is more than or equal to 0.3 and is less than 1. The electric tool can be adapted to battery packs with different capacities.

Description

Electric tool

Technical Field

The present invention relates to an electric power tool.

Background

Electric tool on the market generally all adopts two kinds of modes to realize the power supply, one kind is external power supply, one kind is to adopt the battery package, if adopt external power supply, often can only work in the place that has power source, great restriction the space range that electric tool used, and adopt this problem of solution that the battery package can be fine, but electric tool can meet multiple operating mode at the during operation, the requirement to battery package duration is also different under the different operating modes, in some occasions, need electric tool long-time work, and then need install the battery package of large capacity, two are in some other occasions, need not the battery package to have stronger duration, can cause inconvenience to the user because of installing great battery package on the contrary. The current electric tools on the market can not solve the problem.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide an electric tool structure capable of adapting to battery packs with different capacities.

In order to achieve the above object, the present invention adopts the following technical solutions: a power tool, comprising: an output member for outputting power; a motor for driving the output member; a housing for housing at least part of the motor; wherein, the casing includes: the battery pack accommodating part is provided with a first battery pack accommodating cavity and a guide structure for guiding the battery pack to be inserted into the first battery pack accommodating cavity along a first linear direction; the battery pack accommodating part includes: a first sidewall disposed at a left side of the battery pack when the battery pack is coupled to the first battery pack receiving cavity; a second sidewall opposite the first sidewall; a third sidewall provided at an upper side of the battery pack when the battery pack is coupled to the first battery pack receiving cavity;

the battery pack accommodating cavity is characterized in that the side wall is also provided with an opening which penetrates through the first battery pack accommodating cavity along a second straight line direction perpendicular to the first straight line; the opening is still opened towards the direction of keeping away from the diapire along first rectilinear direction, and the ratio of the size of opening along first rectilinear direction and the size of first battery package holding chamber in first rectilinear direction is more than or equal to 0.3 and is less than 1.

Further, the ratio of the size of the opening in the first linear direction to the size of the first battery pack accommodating cavity in the first linear direction is greater than or equal to 0.4 and less than or equal to 0.9.

Further, the ratio of the size of the opening in the first linear direction to the size of the first battery pack accommodating cavity in the first linear direction is greater than or equal to 0.6 and less than or equal to 0.8.

Further, the electric tool has a center plane, the first side wall is disposed on the left side of the center plane, the second side wall is disposed on the right side of the center plane, and the center plane passes through the opening.

Further, the side walls include a fourth side wall opposite the third side wall, the fourth side wall being symmetrical about the mid-plane.

Further, the battery pack accommodating part comprises a bottom wall, a terminal seat is arranged on the bottom wall, a tool terminal is arranged on the terminal seat, and when the battery pack is installed in the first battery pack accommodating cavity, a gap is formed between the battery part and the terminal seat.

Furthermore, the terminal seat is also provided with a positioning column for positioning the battery pack, and the length of the part of the positioning column protruding out of the terminal seat is smaller than the length of the part of the tool terminal protruding out of the terminal seat.

Further, the guide structure comprises guide ribs arranged on the first side wall and the second side wall, and the guide ribs comprise a plurality of discontinuous positioning protrusions.

Furthermore, a part of the first side wall and the third side wall is integrally formed into a first whole, the other part of the third side wall and the second side wall is integrally formed into a second whole, the first whole and the second whole form a detachable connection, and the fourth side wall is connected with the first whole and the second whole.

Further, the power tool further comprises a locking assembly for locking the battery pack to the first battery pack receiving cavity, the locking assembly being disposed on the third side wall.

The utility model has the advantages that: an electric tool structure capable of adapting to battery packs of different capacities is provided.

Drawings

Figure 1 is a perspective view of a hair dryer shown in the present application;

figure 2 is a cross-sectional view of the blower of figure 1;

figure 3 is a perspective view of the blower of figure 1 with the tool body separated from the battery pack;

figure 4 is an exploded view of part of the structure of the tool body of the blower of figure 1;

figure 5 is a perspective view from another perspective of an exploded view of part of the structure of the tool body in the blower of figure 4;

figure 6 is an exploded view of part of the structure of the tool body of the blower of figure 1;

FIG. 7 is a perspective view of a battery pack in the blower of FIG. 1;

fig. 8 is a perspective view of the battery pack of fig. 7 from another perspective;

fig. 9 is a plan view of the battery pack shown in fig. 7;

fig. 10 is a plan view of the battery pack shown in fig. 7;

fig. 11 is a perspective view of a partial structure of the battery pack shown in fig. 7;

fig. 12 is a perspective view from another perspective of a portion of the structure of the battery pack shown in fig. 11;

fig. 13 is a plan view of a part of the structure of the battery pack shown in fig. 11;

FIG. 14 is a perspective view of an arrangement of electric core assemblies in the battery pack of FIG. 11;

fig. 15 is an exploded view of the arrangement of the electric core assembly in the battery pack of fig. 14;

FIG. 16 is a perspective view of an alternative arrangement of the electric core assembly of the battery pack of FIG. 14;

fig. 17 is an exploded view of the arrangement of the electric core assembly in the battery pack of fig. 16.

Detailed Description

As shown in fig. 1, the power tool for mounting the battery pack 40 to the tool body 100a along the first straight line 101 is specifically exemplified by the blower 100 in this application, and the blower 100 can be operated by a user to clean some objects such as leaves, grass, snow, dust, etc. It will of course be appreciated that the power tool may be other types of tools such as a lawn mower, a snow blower, a pole saw, a chain saw, etc. Indeed, it is within the scope of the present application to include the material described below in the present application.

As shown in fig. 1 to 3, the blower 100 includes a tool main body 100a and a battery pack 40, the tool main body 100a including: output member 10, motor 20, housing 30, handle portion 70, and switch assembly 80.

The output member 10 is a fan 10a, and the output member 10 is used for outputting power, namely the fan 10a rotates to generate airflow.

The motor 20 is used for driving the fan 10a to rotate.

An accommodating space 37 is formed in the housing 30, and the motor 20 is at least partially disposed in the accommodating space 37. The casing 30 is formed with or fixedly connected with an air duct 38, and the air duct 38 is formed with an air duct through which air flows. That is, the motor 20 drives the fan 10a to rotate, so as to generate an air flow, and finally the air flow is blown out from the air duct 38. A handle portion 70 is fixedly connected to the housing 30 or integrally formed thereon, and the handle portion 70 can be held by a user. The switch assembly 80 for starting the motor 20 is provided on the handle portion 70, and thus the switch assembly 80 can be conveniently operated when a user grips the handle portion 70.

The battery pack 40 is used to power the motor 20. The battery pack 40 can be mounted to the cabinet 30 along the first straight line 101.

As shown in fig. 7 to 10, the battery pack 40 includes a base portion 41, an extension portion 43, and a connection portion 42, the base portion 41 being disposed apart from the extension portion 43, the connection portion 42 being disposed between the base portion 41 and the extension portion 43 for connecting the base portion 41 and the extension portion 43. The capacity of the battery pack 40 is expanded by connecting the expanding portion 43 in parallel with the base portion 41, that is, the capacity of the expanding portion 43 can be increased as required to increase the overall capacity of the battery pack 40.

The battery pack housing 47 forms an outer shape portion of the battery pack 40, the battery pack housing 47 includes a base housing portion 44, a connecting housing portion 421 and an extension housing portion 431, the base housing portion 44 and the extension housing portion 431 are disposed at a distance, the connecting housing portion 421 is disposed between the base housing portion 44 and the extension housing portion 431 for connecting the base housing portion 44 and the extension housing portion 431, or in other words, the connecting housing portion 421 is disposed between the base housing portion 44 and the extension housing portion 431 such that a gap 60 located outside the battery pack housing 47 is formed between the base housing portion 44 and the extension housing portion 431. When the battery pack 40 is mounted to the chassis 30, the base housing portion 44 and the extension housing portion 431 are disposed on both sides of the chassis 30, and the chassis 30 at least partially passes through the gap 60. The battery pack 40 supplies power to the blower 100 for a long time, a large amount of heat is generated inside the battery pack 40, the service life of internal parts of the battery pack 40 is affected in the past, the base casing part 44 and the extension casing part 431 are arranged at intervals, the heat dissipation area of the battery pack 40 can be increased, and therefore the battery pack 40 can dissipate heat conveniently.

Referring to fig. 11 and 13, the battery pack 40 further includes a bracket 472, an electrode assembly 471, a pole piece terminal assembly 481, an interface circuit board 48 and a connecting device 49. The holder 472 is fixedly connected to the battery pack housing 47 or is directly formed by the battery pack housing 47, and the holder 472 is used for supporting the electric core assembly 471, which can also be understood as that the electric core assembly 471 is fixed on the holder 472, so that the electric core assembly 471 is fixed in the battery pack housing 47. The electric core assembly 471 comprises a first electric core assembly 45 and a second electric core assembly 46, and the first electric core assembly 45 and the second electric core assembly 46 are used for storing electric quantity. An interface circuit board 48 is fixedly installed in the battery pack housing 47, the interface circuit board 48 is disposed at one end of the electric core assembly 471 along the insertion direction of the tool terminal 361, and the interface circuit board 48 is used for electrically connecting the first electric core assembly 45 and the second electric core assembly 46 to the pole piece terminal assembly 481. The pole piece terminal assembly 481 is mounted on the interface circuit board 48, and the pole piece terminal assembly 481 is used for electrically connecting the battery pack 40 with the tool terminal 361 of an external tool, i.e. it can be understood that the pole piece terminal assembly 481 is used for connecting with the tool terminal 361 of the tool main body 100a so as to provide the electric quantity stored in the first electric core group 45 and the second electric core group 46 to the tool main body 100a, of course, the pole piece terminal assembly 481 can also be used for connecting with a charger to charge the first electric core group 45 and the second electric core group 46. The connecting device 49 is electrically connected to the interface circuit board 48, and further, the connecting device 49 and the interface circuit board 48 may be connected by a connecting sheet, a conducting wire, etc. with electrical conductivity, in this embodiment, the connecting device 49 and the interface circuit board 48 may be connected by a conducting wire 491, so that the arrangement of the internal structure of the battery pack 40 is more reasonable.

The first electric core group 45 is disposed in the first receiving cavity 411 formed in the base housing part 44, and the second electric core group 46 is disposed in the second receiving cavity 432 formed in the expanding housing part 431. Wherein, the projection of the first electric core group 45 in a plane C perpendicular to the first straight line 101 is not overlapped with the projection of the second electric core group 46 in the plane C, that is, it can be understood that the first electric core group 45 is not overlapped with the second electric core group 46, and the first electric core group 45 and the second electric core group 46 are basically arranged along the direction extending perpendicular to the plane C.

The first battery cell pack 45 includes a plurality of first battery cell units 451, and the second battery cell pack 46 includes a plurality of second battery cell units 461, wherein the first battery cell unit 451 is disposed in the first battery pack accommodating chamber 32, and the second battery cell unit 461 is disposed in the second battery pack accommodating chamber 33 when the battery pack 40 is mounted to the casing 30. In one embodiment, the first cell unit 451 is a cylinder centered on the first center line 103, the second cell unit 461 is a cylinder centered on the second center line 104, and the direction of the first center line 103 is parallel to the direction of the second center line 104. It is also understood that the first cell unit 451 and the second cell unit 461 are disposed in parallel in the battery pack case 47. The first center line 103 is parallel to the first straight line 101, i.e., the first cell unit 451 and the second cell unit 461 are disposed in the same direction as the battery pack 40 is inserted into the tool body 100 a. Of course, as another embodiment, the first central line direction and the second central line direction are perpendicular to each other, and the first central line direction is parallel to the first central line direction, that is, the first cell unit disposing direction is parallel to the inserting direction of the battery pack, and the second cell unit disposing direction is perpendicular to the inserting direction of the battery pack. In another embodiment, the first center line and the second center line are perpendicular to each other, and the first center line direction and the first straight line direction are perpendicular to each other, that is, the first cell unit disposing direction and the battery pack inserting direction are perpendicular to each other, and the second cell unit disposing direction and the battery pack inserting direction are parallel to each other. In another embodiment, the direction of the first center line is parallel to the direction of the second center line, the first center line direction is perpendicular to the battery pack insertion direction, the second center line direction is perpendicular to the battery pack insertion direction, that is, the first cell unit arrangement direction is perpendicular to the battery pack insertion direction, and the second cell unit arrangement direction is perpendicular to the battery pack insertion direction. In the present embodiment, it is preferable that the first central line 103 is parallel to the second central line 104, and the first central line 103 is parallel to the first straight line 101, that is, the first cell unit 451 and the second cell unit 461 are arranged in a direction parallel to the insertion direction of the battery pack 40, and the first core pack 45 and the second core pack 46 are arranged side by side in a direction perpendicular to the first straight line 101.

The first cell group 45 includes a plurality of first cell units 451 arranged in a first plane P1, and the second cell group 46 includes a plurality of second cell units 461 arranged in a second plane P2, the first plane P1 and the second plane P2 being parallel to each other. It should be noted that the first and second battery packs 45 and 46 at least include a plurality of first and second cell units 451 and 461 along a direction perpendicular to the first straight line 101, and for convenience of description, it is defined that, in the direction perpendicular to the first straight line 101, the first and second cell units 451 and 461 with the shortest distance from the first central line 103 to the second central line 104 are located in the corresponding first and second planes P1 and P2, that is, in the direction perpendicular to the first straight line 101, the centers of the nearest first and second cell units 451 and 461 are located in the first and second planes P1 and P2. Wherein the distance between the first plane P1 and the second plane P2 is greater than or equal to 30 mm and less than or equal to 80 mm, and the distance between the first plane P1 and the second plane P2 is set within the above reasonable range, so that the electrical connection between the first electric core group 45 and the second electric core group 46 can be more reliable, and the difficulty of assembly and manufacture can be reduced.

Further, the first cell group 45 includes at least 3 or more first cell units 451 arranged in a first plane P1, and the second cell group 46 includes at least 3 or more second cell units 461 arranged in a second plane P2, where the first plane P1 is parallel to or coincides with the first center line 103. Further, the ratio of the number of first cell units 451 to the number of second cell units 461 is 0.3 or more and 2 or less. That is to say, the user can set up different quantity's electric core unit according to the demand to can select the extension portion 43 of different capacity, and then promoted user's selection space. In order to avoid the overlong thickness direction of the battery pack 40, the plurality of first cell units 451 of the first cell group 45 may be arranged along the first central line 103, and in a direction perpendicular to the first central line 103, a plurality of first cell units 451 may be provided, and preferably, two first cell units 451 may be selected to be arranged along the first central line 103, so that the overlong length of the base portion 41 in the length direction can be avoided, and the overlong thickness direction of the base portion 41 can be avoided.

As an embodiment, as shown in fig. 14 and 15, a first positive terminal 452 and a first negative terminal 453 for electrically connecting the first core pack 45 to the interface circuit board 48 are installed on the first core pack 45, and a second positive terminal 462 and a second negative terminal 463 for electrically connecting the second core pack 46 to the interface circuit board 48 are installed on the second core pack 46, and the connecting device 49 electrically connects the first positive terminal 452 and the second positive terminal 462, thereby electrically connecting the first core pack 45 and the second core pack 46. In the present embodiment, the connecting device 49 is disposed in the battery pack case 47, and the connecting device 49 is disposed at least partially on both sides of the first electric core pack 45 opposite to the interface circuit board 48, and it can also be understood that the connecting device 49 is disposed at least partially at both ends of the inner space of the battery pack case 47 separately from the interface circuit board 48. Specifically, the connecting device 49 includes a connecting plate 492 and an elongated pole piece 493, the connecting plate 492 is disposed at one end of the first electric core group 45, and the interface circuit board 48 is disposed at the other end of the first electric core group 45. Further, the connecting plate 492 is communicated with the first positive terminal 452 through the metal connecting sheet 494, meanwhile, the connecting plate 492 is communicated with the second positive terminal 462 through the metal connecting sheet 494, the long pole piece 493 electrically connects the first electric core group 45 and the second electric core group 46, so that the first electric core group 45 and the second electric core group 46 are connected in parallel, the connecting plate 492 is connected with the interface circuit board 48 through the conducting wire 491, thus the positive terminals of the first electric core group 45 and the second electric core group 46 can be connected to the interface circuit board 48 through only one circuit, and the connecting structure inside the battery pack 40 is simplified. The long pole piece 493 is arranged in the middle of the first cell core group 45 in the direction along the first central line 103, that is, the long pole piece 493 is not arranged at both ends of the first cell core group 45, and may be arranged substantially between the first cell unit 451 and the first cell unit 451, while the long pole piece 493 is arranged between the first cell unit 451 and the second cell unit 461 near the second cell unit 461, that is, in the direction perpendicular to the first central line 103.

As another embodiment, as shown in fig. 16 and 17, the first electric core group 45a is mounted with a first positive terminal 452a and a first negative terminal 453a for electrically connecting the first electric core group 45a to the interface circuit board 48a, and likewise, the second electric core group 46a is mounted with a second positive terminal 462a and a second negative terminal 463a for electrically connecting the second electric core group 46a to the interface circuit board 48a, and the connecting device 49a electrically connects the first negative terminal 453a and the second negative terminal 463a, thereby electrically connecting the first electric core group 45a and the second electric core group 46 a. In the present embodiment, the connection device 49a is disposed in the battery pack case at both sides of the first electric core pack 45a opposite to the interface circuit board 48a, and it can also be understood that the connection device 49a and the interface circuit board 48a are disposed at both ends of the inner space of the battery pack case, respectively. The connecting device 49a comprises a connecting plate 492a and an elongated pole piece 493a, the connecting plate 492a is arranged at one end of the first electric core group 45a, and the interface circuit board 48a is arranged at the other end of the first electric core group 45 a. Further, the connecting plate 492a is communicated with the first negative electrode terminal 453a through the metal connecting sheet 494a, meanwhile, the connecting plate 492a is communicated with the second negative electrode terminal 463a through the metal connecting sheet 494a, the long pole piece 493a electrically connects the first electric core group 45a and the second electric core group 46a, so that the first electric core group 45a and the second electric core group 46a are connected in parallel, the connecting plate 492a and the interface circuit board 48a are connected by adopting a conducting wire 491a, thus the negative electrode terminals of the first electric core group 45a and the second electric core group 46a can be connected to the interface circuit board 48a through only one circuit, and the connecting structure inside the battery pack is simplified. The long pole piece 493a is disposed in the middle of the first battery core group 45a in the direction along the first central line 103a, that is, the long pole piece 493a is not disposed at both ends of the first battery core group 45a, and may be disposed substantially between the first cell unit 451a and the first cell unit 451a, while the long pole piece 493a is disposed between the first cell unit 451a and the second cell unit 461a near the second cell unit 461a, that is, in the direction perpendicular to the first central line 103 a.

As shown in FIGS. 11-13, the pole piece terminal assembly 481 is at least partially mounted within the battery pack housing 47, and further, the pole piece terminal assembly 481 is at least partially disposed within the base housing portion 44. The pole piece terminal assembly 481 is used for providing the electric power of the first electric core group 45 and the second electric core group 46 to the motor 20 in the tool main body 100a, and in the embodiment, the electric conductivity of the pole piece terminal assembly 481 is greater than or equal to 30% IACS and less than or equal to 100% IACS, that is, the electric conductivity of the pole piece terminal assembly 481 is set within the above range, so that the electric conductivity of the pole piece terminal assembly 481 and the tool terminal 361 is ensured. Further, the conductivity of the pole piece terminal assembly 481 is greater than or equal to 50% IACS and less than or equal to 90% IACS, which can ensure the stability of the connection between the pole piece terminal assembly 481 and the tool terminal 361 and the conductivity between the pole piece terminal assembly 481 and the tool terminal 361.

Pole piece terminal assembly 481 includes a positive terminal assembly 482, a negative terminal assembly 483, and a signal terminal assembly 484 that are mounted to interface circuit board 48. The positive terminal assembly 482, the negative terminal assembly 483 and the signal terminal assembly 484 are fixedly connected to the interface circuit board 48, the positive terminal assembly 482 is connected to the positive electrode of the battery pack 471, the negative terminal assembly 483 is connected to the negative electrode of the battery pack 471, the positive terminal assembly 482 and the negative terminal assembly 483 are in contact connection with the tool terminal 361 on the tool main body 100a to realize the electrical connection of the battery pack 40 with an external device, and the signal terminal assembly 484 is used for being connected with the tool communication terminal of the blower 100 to establish the communication connection between the battery pack 40 and the blower 100, so that the battery pack 40 and the blower 100 can realize data communication. Further, a positive terminal assembly 482 is for connection with a positive connection terminal of the blower 100, a negative terminal assembly 483 is for connection with a negative connection terminal of the blower 100, and the positive terminal assembly 482 and the negative terminal assembly 483 are for enabling the battery pack 40 to transmit electrical energy to the blower 100. The positive terminal assembly 482, the negative terminal assembly 483, and the signal terminal assembly 484 of the pole piece terminal assembly 481 each extend in the direction of insertion of the tool terminal 361 on the interface circuit board 48, while the positive terminal assembly 482, the negative terminal assembly 483, and the signal terminal assembly 484 of the pole piece terminal assembly 481 are disposed generally parallel to each other in the direction perpendicular to the direction of insertion of the tool terminal 361 on the interface circuit board 48. Wherein the insertion direction of the tool terminal 361 is substantially parallel to the first straight line 101 direction. The dimension F1 of the positive terminal assembly 482 in the direction in which the tool terminal 361 is inserted is 7mm or more and 15mm or less. Setting the size of the positive terminal assembly 482 within the above range ensures the stability of the connection between the positive terminal assembly 482 and the tool terminal 361, and does not cause an excessive length of the battery pack 40 in the longitudinal direction. The negative terminal assembly 483 has a dimension F2 in the insertion direction of the tool terminal 361 of 7mm or more and 15mm or less. Also, setting the size of the negative electrode terminal assembly 483 within the above range can ensure the stability of the connection between the negative electrode terminal assembly 483 and the tool terminal 361 without causing an excessive length of the battery pack 40 in the longitudinal direction. In this embodiment, the positive terminal assembly 482 and the negative terminal assembly 483 are substantially equal in size in the tool insertion direction. Further, the communication terminal assembly is substantially equal in size to the positive terminal assembly 482 in the tool insertion direction. It should be noted that the dimension F1 of the positive terminal assembly 482 in the insertion direction of the tool terminal 361 refers to the distance between the end of the positive terminal assembly 482 away from the core assembly 471 and the interface circuit board 48 in the insertion direction of the tool terminal 361, and the dimension F2 of the negative terminal assembly 483 in the insertion direction of the tool terminal 361 is the same as the positive terminal assembly 482.

In a direction perpendicular to the first plane P1, a projection of the connecting housing portion 421 onto the first plane P1 overlaps a projection of the base housing portion 44 onto the first plane P1, and a projection area of the overlapping portion occupies less than 90% of a projection area of the base housing portion 44 onto the first plane P1, that is, only a partial intersection is formed between the connecting housing portion 421 and the base housing portion 44. The ratio of the dimension of the connecting housing portion 421 to the dimension of the base housing portion 44 in the direction along the first center line 103 is 0.3 or more and less than 1, that is, the dimension of the connecting housing portion 421 is smaller than the dimension of the base housing portion 44 in the direction along the first center line 103. Also, the size of the connecting housing portion 421 is smaller than that of the expanding housing portion 431. The base housing portion 44, the connecting housing portion 421 and the expanding housing portion 431 are approximately recessed in a direction perpendicular to the first plane P1.

As some specific embodiments, the orthographic projection of the gap 60 between the base housing portion 44 and the expansion housing portion 431 on the first plane P1 may be L-shaped, U-shaped, C-shaped, V-shaped, etc., and it is not limited to what the orthographic projection of the gap 60 between the base housing portion 44 and the expansion housing portion 431 on the first plane P1 is specifically, as long as the long pole piece 493 connected between the base portion 41 and the connecting portion 42 can be surrounded. In the present embodiment, the orthogonal projection of the gap 60 between the base housing portion 44 and the extension housing portion 431 on the first plane P1 is U-shaped, which not only facilitates the manufacturing, but also facilitates the user to install the battery pack 40. Further, the base housing portion 44 includes a first base surface 441 and a second base surface 442 which are oppositely disposed, the expansion housing portion 431 includes a first expansion surface 4311 and a second expansion surface 4312 which are oppositely disposed, the first base surface 441 is disposed adjacent to the first expansion surface 4311 in a direction perpendicular to the first plane P1, and both the first base surface 441 and the first expansion surface 4311 are at least partially connected to the connecting housing portion 421. The distance H1 between the first base surface 441 and the first extension surface 4311 in the direction perpendicular to the first plane P1 is greater than or equal to 2 mm and less than or equal to 20 mm, and it can be understood that the thickness of the gap 60 is greater than or equal to 2 mm and less than or equal to 20 mm. With clearance 60 thickness setting within the above-mentioned range, on the one hand can guarantee to be used for connecting first electric core group 45 and second electric core group 46 connecting plate 492 and long pole piece 493 and can not the overlength to make the electric connection between basic casing portion 44 and the extension casing portion 431 more reliable, reduced the assembly degree of difficulty of battery package 40 again, on the other hand sets up like this, has increased the heat radiating area of basic part 41 and extension part 43, is convenient for battery package 40 fan heat.

A dimension H2 of the gap 60 in the width direction perpendicular to the first center line 103 and parallel to the first plane P1 is equal to or greater than 30 mm and equal to or less than 200 mm. Setting the width of the gap 60 within the above range not only stabilizes the connection between the base housing portion 44 and the extension housing portion 431, but also facilitates the user to mount the battery pack 40 to the chassis 30.

For clarity of explanation of the technical solution of the present application, the left side, the right side, the upper side, the lower side, the front side and the rear side in the present application as shown in fig. 1 refer to six orientations of the battery pack 40 in a direction perpendicular to the first straight line 101 when the battery pack 40 is mounted to the battery pack accommodating part 31.

Referring to fig. 3 to 4 together, the housing 30 is fixedly connected with or integrally formed with a battery pack accommodating portion 31, in this application, the battery pack accommodating portion 31 is integrally formed with the housing 30. The battery pack accommodating part 31 comprises a first battery pack accommodating cavity 32 and a second battery pack accommodating cavity 33, when the battery pack 40 is mounted to the battery pack accommodating part 31, the base part 41 is at least partially located in the first battery pack accommodating cavity 32, and the extension part 43 is at least partially located in the second battery pack accommodating cavity 33, that is, the first electric core set 45 is at least partially disposed in the first battery pack accommodating cavity 32, the second electric core set 46 is at least partially disposed outside the first battery pack accommodating cavity 32, and in the embodiment, the second electric core set 46 is at least partially disposed in the second battery pack accommodating cavity 33. With the arrangement, the battery pack accommodating part 31 can be provided with the battery pack 40 with different capacity according to the requirements of the user, so that the selection of the user is enriched, and the convenience of the user is improved; and the capacity of the battery pack 40 extension part 43 can be infinitely extended according to the requirements of users, so that the cruising ability of the hair drier 100 can be effectively increased, the working time of the hair drier 100 is prolonged, the users do not need to frequently replace the battery pack 40, and the operation of the users is convenient. In the present application, the second battery pack accommodating chamber 33 may be understood as an external space.

The first battery pack accommodating chamber 32 includes: the first sidewall 321, the second sidewall 322, the third sidewall 323, the fourth sidewall 324, and the bottom wall 325, i.e., the first battery pack receiving cavity 32, are surrounded by the above four sidewalls and the bottom wall 325. specifically, when the battery pack 40 is mounted to the battery pack receiving part 31, the first sidewall 321 is disposed at the left side of the battery pack 40, the second sidewall 322 is disposed opposite to the first sidewall 321, i.e., the second sidewall 322 is disposed at the right side of the battery pack 40, the third sidewall 323 is disposed at the upper side of the battery pack 40, and the fourth sidewall 324 is disposed opposite to the third sidewall 323, i.e., the fourth sidewall 324 is disposed at the lower side of the battery pack 40, wherein the outer wall of the fourth sidewall 324 defines a limit plane a parallel to the first line 101, and the base portion 41 and the extension portion 43 of the battery pack 40 are disposed at both sides of the limit plane a, respectively. Further, the base portion 41 is disposed in the first battery pack accommodating cavity 32, and the extension portion 43 is disposed outside the first battery pack accommodating cavity 32, it being understood that the base portion 41 is disposed on a side of the fourth sidewall 324 close to the third sidewall 323, and the extension portion 43 is disposed on a side of the fourth sidewall 324 far from the third sidewall 323, such that the battery packs 40 with different capacities can be connected without completely resetting the battery pack accommodating portion 31, and such that the battery capacity of the extension portion 43 outside the first battery pack accommodating cavity 32 can be free from structural limitations, thereby enabling the extension portion 43 to be wirelessly expanded, thereby improving the performance of the hair dryer 100 and the duration of the hair dryer 100. It should be noted that the side walls are not limited to a plane. It should be noted that the fourth sidewall 324 may not be limited to only one component, and may be a part fixedly connected to the first sidewall 321 or directly formed by the first sidewall 321 extending into the first battery pack receiving cavity 32, and another part of the fourth sidewall 324 may be fixedly connected to the second sidewall 322 or directly formed by the second sidewall 322 extending into the first battery pack receiving cavity 32, that is, the fourth sidewall 324 may be formed by two parts, and the length of the part and the another part of the fourth sidewall 324 in the direction parallel to or coinciding with the limit plane a is not limited, that is, the length of the fourth sidewall 324 may be equal to 0mm, that is, the third housing part 313 is not included, so that the first battery pack receiving cavity 32 formed by the first sidewall 321, the second sidewall 322, the third sidewall 323 and the bottom wall 325 is substantially U-shaped and semi-surrounded. Of course, as another embodiment, the fourth side wall 324 may be formed of a plurality of members. In the present embodiment, the fourth side wall 324 is one member.

In the embodiment, the housing 30 includes a first housing portion 311, a second housing portion 312, and a third housing portion 313, the first housing portion 311 is formed with a first sidewall 321, the second housing portion 312 is formed with a second sidewall 322, the third sidewall 323 and the bottom wall 325 are formed by a portion of the first housing portion 311 and a portion of the second housing portion 312, and the fourth sidewall 324 is formed by the third housing portion 313. It can also be understood that a portion of the first sidewall 321 and the third sidewall 323 is integrally formed as a first integral body 326, the second sidewall 322 and another portion of the third sidewall 323 are integrally formed as a second integral body 327, the first integral body 326 and the second integral body 327 form a detachable fixed connection, the fourth sidewall 324 connects the first integral body 326 and the second integral body 327, and the fourth sidewall 324 and the first integral body 326 and the second integral body 327 form a detachable fixed connection. It should be noted that, the detachable fixed connection means that the components are separated from the original structure without destroying the original structure, and here, the first whole 326 and the second whole 327 are separated from each other without destroying the original structure, that is, the first housing portion 311 and the second housing portion 312 may be connected by a snap connection, a screw 315 connection, and the like, as long as it is satisfied that the first housing portion 311 and the second housing portion 312 are not separated from each other under the condition of normal operation, and in the embodiment, the first housing portion 311 and the second housing portion 312 are connected by the screw 315. Similarly, the fourth sidewall 324 is detachably connected to the second sidewall 322, specifically, the fourth sidewall 324 is connected to the second sidewall 322 by the screw 315, in order to ensure the stability of the connection, one side of the fourth sidewall 324 is detachably connected to the second sidewall 322, the other side of the fourth sidewall 324 is detachably connected to the first sidewall 321, that is, the fourth sidewall 324 is fixed to the second sidewall 322 by the screw 315, the fourth sidewall 324 is fixed to the first sidewall 321 by the screw 315, so as to ensure that after the battery pack 40 is mounted to the battery pack accommodating portion 31 and the motor 20 is operated, the battery pack 40 is not separated from the battery pack accommodating portion 31 due to vibration, and when a component inside the first battery pack accommodating cavity 32 fails, the user can easily detach the fourth sidewall 324, thereby facilitating the maintenance of the user. Further, in order to improve the structural strength of the first battery pack accommodating chamber 32, a reinforcing rib may be provided on the side wall.

Referring also to fig. 5, the hair dryer 100 further includes a middle section B perpendicular to the limit plane a, and the fourth sidewalls 324 are symmetrically disposed about the middle section B, in this embodiment, the first sidewall 321 is disposed on the left side of the middle section B, and the second sidewall 322 is disposed on the right side of the middle section B. It should be noted that the symmetrical arrangement of the fourth sidewall 324 with respect to the bisection plane B in the present application is not strictly limited to be identical on the left and right sides of the bisection plane B, but can be understood as that the fourth sidewall 324 is arranged symmetrically with respect to the bisection plane B as long as the error is within the allowable range. The fourth side wall 324 is disposed between the first battery pack accommodating cavity 32 and the second battery pack accommodating cavity 33, wherein the fourth side wall 324 is formed with an opening 35 communicating the first battery pack accommodating cavity 32 and the second battery pack accommodating cavity 33, and the median plane B passes through the opening 35, it can also be understood that the opening 35 penetrates through the battery pack accommodating portion 31, that is, the fourth side wall 324 is formed with the opening 35 penetrating through the first battery pack accommodating cavity 32 and the second battery pack accommodating cavity 33 along the second straight line 102, and the opening 35 opens in the direction away from the bottom wall 325 along the first straight line 101. When the battery pack 40 is mounted to the battery pack accommodating portion 31, the connecting housing portion 421 for connecting the expanded portion 43 and the base portion 41 passes through the opening 35 described above, and it can be said that the opening 35 guides the battery pack 40 to be coupled to the first battery pack accommodating chamber 32. With the above arrangement, it is convenient for the user to mount the battery pack 40 into the battery pack accommodating portion 31. In the present application, the first straight line 101 is perpendicular to the second straight line 102.

Further, the ratio of the dimension of the opening 35 in the first straight line 101 direction to the dimension of the first battery pack accommodating chamber 32 in the first straight line 101 direction is less than 1. It should be noted that the dimension of the first battery pack accommodating chamber 32 in the direction of the first straight line 101 refers to the dimension of the side wall from the farthest end of the bottom wall 325 to the bottom wall 325 in the direction of the first straight line 101. The distance of the opening 35 in the direction of the first line 101 refers to the dimension of the side wall from the farthest end of the bottom wall 325 in the direction of the first line 101 to the nearest end of the opening 35 from the bottom wall 325 in the direction of the first line 101. Specifically, the ratio of the dimension L1 of the opening 35 along the first straight line 101 to the dimension L2 of the first battery pack accommodating cavity 32 along the first straight line 101 is greater than or equal to 0.3 and less than 1, in this embodiment, the opening 35 can guide the connecting housing portion 421 of the battery pack 40 to be slidably inserted into the first battery pack accommodating cavity 32 along the first straight line 101, that is, the dimension of the opening 35 should be greater than the dimension of the connecting housing portion 421 in the direction perpendicular to the first straight line 101 and parallel to the limit plane a, and the connecting housing portion 421 should be disposed adjacent to the opening 35 when the battery pack 40 is mounted on the battery pack 40 accommodating cavity. Setting the size of the opening 35 and the size of the first receiving cavity 411 within the above range provides sufficient space movement for the connection housing portion 421 of the battery pack 40.

In some other embodiments, the ratio of the dimension L1 of the opening 35 in the direction along the first line 101 to the dimension of the first battery pack receiving cavity 32 in the direction along the first line 101 is greater than or equal to 0.4 and less than or equal to 0.9. In still other embodiments, the ratio of the dimension of the opening 35 in the direction along the first line 101 to the dimension of the first battery pack receiving cavity 32 in the direction along the first line 101 is greater than or equal to 0.6 and less than or equal to 0.8. The connecting housing portion 421 is disposed adjacent to the opening 35, and the ratio of the dimension of the opening 35 in the direction along the first straight line 101 to the dimension of the first battery pack accommodating chamber 32 in the direction along the first straight line 101 is set within the above range, and it can also be understood that the distance from the connecting housing portion 421 to the bottom wall 325 of the first battery pack accommodating chamber 32 is substantially within the above range, so that the connection between the base portion 41 and the extension portion 43 can be more stable, and at the same time, because the connecting housing portion 421 connecting the base portion 41 and the extension portion 43 is disposed between the openings 35, it can be ensured that the battery pack 40 will not shake freely in the accommodating chamber of the battery pack 40 in case of severe vibration.

As shown in fig. 2-7, blower 100 further includes a locking assembly 50 disposed on third side wall 323, locking assembly 50 for locking battery pack 40 into first battery pack receiving cavity 32. It will be appreciated that the locking assembly 50 includes at least a first state (shown in fig. 2) in which the battery pack 40 remains relatively fixed with respect to the first battery pack receiving cavity 32 and a second state (shown in fig. 3) in which the battery pack 40 is separable from the first battery pack receiving cavity 32 when the locking assembly 50 is in the second state.

The locking assembly 50 includes: an operating member 51, a biasing member 52 and a connecting shaft 53, the operating member 51 being capable of being driven to rotate about a first axis 105, the operating member 51 including at least a locking position (as shown in FIG. 2), a releasing position (as shown in FIG. 3) and an initial position (as shown in FIG. 4) during rotation. The initial position refers to a position where the operating member 51 is located when the battery pack 40 is not mounted to the housing 30 without being driven by an external force. When the operating member 51 is rotated in the first direction 1051 about the first axis 105 to rotate the operating member 51 from the release position to the lock position, the battery pack 40 and the housing 30 are relatively fixed, i.e., the lock assembly 50 is in the first state. When the operating member 51 is rotated in the second direction 1052 about the first axis 105 to rotate the operating member 51 from the locking position to the releasing position, the battery pack 40 and the housing 30 can move relative to each other, i.e., the locking assembly 50 is in the second state. The biasing member 52 is used to bias the operating member 51, i.e., the biasing member 52 has a biasing force when installed, such that the operating member 51 rotates about the first axis 105 in the first direction 1051 without the influence of an external force, i.e., the operating member 51 will be in an initial position due to the biasing force when no external force is applied, and a user is required to apply a force to rotate the operating member 51 to a releasing position against the biasing force when the user installs the battery pack 40 to the tool body 100 a. The connecting shaft 53 is mounted to the housing 30, and the operating member 51 and the biasing member 52 are fitted over the connecting shaft 53. The operating member 51 is fixedly connected or integrally formed with an operating portion 511, a locking portion 512, and an intermediate portion 513 connecting the operating portion 511 and the locking portion 512, and the operating portion 511 and the locking portion 512 are provided at both ends of the operating member 51 and constitute a synchronous motion with the operating member 51. The operation portion 511 is used for being operated by a user, that is, the user drives the operation portion 511 to rotate the operation member 51, and the locking portion 512 is used for being matched with the battery pack 40 to realize locking and releasing. Further, a groove portion 412 is provided on the surface of the upper side of the battery pack 40, the groove portion 412 can be engaged with the locking portion 512 to achieve locking, and the groove portion 412 is separated from the locking portion 512, so that the battery pack 40 is released. In the present embodiment, the operation portion 511 and the lock portion 512 are integrally formed with the operation piece 51. The operating member 51 is substantially zigzag in cross section in a direction perpendicular to the limiting plane a, i.e., the operating portion 511 of the operating member 51 is higher than the locking portion 512 in a direction perpendicular to the limiting plane a, i.e., the intermediate portion 513 connects the operating portion 511 and the locking portion 512 in an inclined manner. That is, in the direction perpendicular to the limit plane a, a space 314 is formed between the operating portion 511 and the first and second housing portions 311 and 312 for disposing a screw 315 for fixedly connecting the first and second housing portions 311 and 312.

The tool body 100a further includes a terminal block 36 disposed on the bottom wall 325 and a resilient member 90 disposed adjacent to the terminal block 36. The terminal base 36 is fixedly connected to the casing 30, the terminal base 36 is fixedly connected with a tool terminal 361 and a positioning post 362, the tool terminal 361 is used for being connected with the battery pack 40, so that the function of supplying power to the tool main body 100a by the battery pack 40 is achieved, and specifically, the tool terminal 361 and the pole piece terminal assembly 481 of the battery pack 40 are electrically connected. The positioning posts 362 are fixedly connected to or integrally formed with the terminal base 36, and the positioning posts 362 are used for guiding the battery pack 40 to be mounted to the locking position along the first straight line 101. At least two or more tool terminals 361 extending along the first straight line 101 are disposed on the terminal base 36, that is, the extending direction of the positioning pillars 362 is substantially the same as the extending direction of the tool terminals 361, and the length of the part of the tool terminal 361 protruding out of the terminal base 36 is longer than the length of the part of the positioning pillars 362 protruding out of the terminal base 36 in the direction along the first straight line 101, that is, the tool terminal 361 is higher than the positioning pillars 362. With the above arrangement, during the sliding installation of the battery pack 40 along the line 101 to the locking position, the tool terminal 361 is first inserted into the pole piece terminal assembly 481 of the battery pack 40, i.e. the tool terminal 361 is first aligned with the pole piece assembly of the battery pack 40, and then guided by the positioning post 362 to be finally installed to the locking position. Because the hardness of the tool terminal 361 and the battery pack 40 terminal pole piece is smaller than that of the positioning column 362, the arrangement is convenient for a user to better insert the tool terminal 361 into the pole piece terminal assembly 481, and the situation that the tool terminal 361 and the pole piece terminal assembly 481 cannot be aligned to cause sparking after the positioning column 362 is aligned first is avoided. Meanwhile, the hardness of the positioning post 362 is greater than that of the tool terminal 361, so that the stability of connection between the battery pack 40 and the terminal seat 36 can be ensured, and the situation that the terminals are separated or deformed due to vibration when a tool is operated is avoided.

The elastic member 90 elastically abuts against the battery pack 40 for supporting the battery pack 40 on the one hand, and when the battery pack 40 is released from the battery pack accommodating portion 31 on the other hand, the elastic member 90 applies a force to the battery pack 40 to move the battery pack 40 to the rear side, thereby ejecting the battery pack 40. The elastic assembly 90 includes a support member 91, an elastic member 92. The support member 91 is adapted to abut the battery pack case 47 when the battery pack 40 is mounted to the locked position. The elastic member 92 is for abutting against the supporting member 91. Specifically, the supporting member 91 is formed with a supporting portion protruding toward the first battery pack accommodating chamber 32 substantially along the first straight line 101, the elastic member 92 is at least partially disposed in the supporting member 91, one end of the elastic member 92 is fixed to the chassis 30, and the other end abuts against the supporting member 91. When the battery pack 40 is in the locked position, the length of the portion of the supporting member 91 protruding from the terminal block 36 in the direction along the first straight line 101 is smaller than the length of the portion of the positioning post 362 protruding from the terminal block 36, and the distance from the supporting member 91 to the bottom wall 325 is greater than 0mm, that is, when the battery pack 40 is mounted in place, the battery pack case 47 contacts the supporting member 91 with a space between the supporting member 91 and the terminal block 36. When a user selects a large-capacity battery pack 40 according to the requirement, the battery pack 40 is also heavy, so that the terminal block 36 is easily damaged by the battery pack case 47 when the battery pack 40 is mounted in the first battery pack accommodating cavity 32, and by the arrangement, the impact force caused by the battery pack 40 is buffered by using the characteristics of the elastic element 92, so that the damage of the terminal block 36 is avoided, and the service life of the terminal block 36 is prolonged. Meanwhile, when the battery pack 40 is released, the elastic member 92 moves the battery pack 40 in a direction opposite to the insertion direction due to the deformation force generated from the battery pack 40, thereby facilitating the user to take out the battery pack 40.

The battery pack receiving portion 31 is configured to allow the battery pack 40 to be at least partially inserted in the first straight line 101 direction, i.e., it can be understood that the battery pack 40 can be inserted in the battery pack receiving portion 31 in the first straight line 101 direction. In the present embodiment, the battery pack accommodating part 31 is provided with the guide structure 34 for guiding the battery pack 40 to be inserted into the battery pack accommodating part 31 in the direction of the first straight line 101, and the guide structure 34 is disposed in the first battery pack accommodating chamber 32 and adjacent to the end of the side wall. Specifically, the guiding structure 34 is disposed on a side wall of the first battery pack receiving cavity 32, and the guiding structure 34 includes at least a pair of oppositely disposed guiding ribs 341, which are defined herein as a first guiding rib position 3411 and a second guiding rib position 3412, the first guiding rib position 3411 is fixedly connected to or integrally formed with the first side wall 321, and the second guiding rib position 3412 is fixedly connected to or integrally formed with the second side wall 322. In this embodiment, the guiding rib 341 is integrally formed with the side wall, that is, the first side wall 321 is formed with a first guiding rib position 3411 protruding to the first battery pack accommodating cavity 32, and the second side wall 322 is also formed with a second guiding rib position 3412 protruding to the first battery pack accommodating cavity 32. Through set up direction muscle 341 on first lateral wall 321 and second lateral wall 322, not only can be convenient for the battery package 40 installation, can also realize the location to controlling of battery package 40, avoid battery package 40 to rock in first battery package holds chamber 32. The first guide rib 3411 and the second guide rib 3412 include a plurality of discontinuous positioning protrusions, the base housing portion 44 of the battery pack 40 is formed with a guide groove 413 corresponding to the guide rib 341, the guide groove 413 is formed by inward recessing of the battery pack housing 47 along the length direction of the battery pack 40, and the guide groove 413 of the battery pack 40 is matched with the positioning protrusions to position the battery pack 40. By providing a plurality of protrusions on the guide rib 341, the problem of positioning of the guide rib 341 due to deformation can be effectively avoided. It should be noted that the extending length of the guiding rib 341 in the direction substantially along the first straight line 101 is not limited herein.

Further, the fourth side wall 324 and the third side wall 323 are fixedly connected or integrally formed with guide ribs 341 disposed opposite to each other, so as to position the battery pack 40 up and down. Specifically, a third guiding rib position 3413 is arranged on the third side wall 323, a fourth guiding rib position 3414 is arranged on the fourth side wall 324, a fourth guiding rib position 3414 is formed on the fourth side wall 324, and the third side wall 323 is fixedly connected with the third guiding rib position 3413, i.e., the third guiding rib position 3413 and the third side wall 323 are separately arranged, and the third guiding rib position 3413 is an independent part, so that the first housing part 311 and the second housing part 312 can be conveniently molded.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims (10)

1. A power tool, comprising:

an output member for outputting power;

a motor for driving the output member;

a housing for accommodating at least part of the motor;

wherein, the casing includes:

the battery pack accommodating part is provided with a first battery pack accommodating cavity and a guide structure for guiding the battery pack to be inserted into the first battery pack accommodating cavity along a first linear direction;

the battery pack accommodating part includes:

a first sidewall provided at a left side of the battery pack when the battery pack is coupled to the first battery pack receiving cavity;

a second sidewall opposite the first sidewall;

a third sidewall provided at an upper side of the battery pack when the battery pack is coupled to the first battery pack receiving chamber;

a bottom wall disposed at a front side of the battery pack when the battery pack is coupled to the first battery pack receiving cavity;

the battery pack is characterized in that the side wall is also provided with an opening which penetrates through the first battery pack accommodating cavity along a second straight line direction perpendicular to the first straight line; the opening is also opened towards the direction far away from the bottom wall along the first straight line direction, and the ratio of the size of the opening along the first straight line direction to the size of the first battery pack accommodating cavity in the first straight line direction is greater than or equal to 0.3 and smaller than 1.

2. The power tool of claim 1, wherein:

the ratio of the size of the opening along the first straight line direction to the size of the first battery pack accommodating cavity in the first straight line direction is greater than or equal to 0.4 and less than or equal to 0.9.

3. The power tool of claim 2, wherein:

the ratio of the size of the opening in the first linear direction to the size of the first battery pack accommodating cavity in the first linear direction is greater than or equal to 0.6 and less than or equal to 0.8.

4. The power tool of claim 1, wherein:

the electric tool is provided with a center parting surface, the first side wall is arranged on the left side of the center parting surface, the second side wall is arranged on the right side of the center parting surface, and the center parting surface passes through the opening.

5. The power tool of claim 4, wherein:

the sidewalls include a fourth sidewall opposite the third sidewall, the fourth sidewall being symmetrical about the bisecting plane.

6. The power tool of claim 1, wherein:

be provided with the terminal seat on the diapire, be provided with the tool terminal on the terminal seat battery package is installed extremely when first battery package holds the chamber, the battery package with have the clearance between the terminal seat.

7. The power tool of claim 6, wherein:

the terminal seat is also provided with a positioning column for positioning the battery pack, and the length of the part of the positioning column protruding out of the terminal seat is smaller than the length of the part of the tool terminal protruding out of the terminal seat.

8. The power tool of claim 1, wherein:

the guide structure comprises guide ribs arranged on the first side wall and the second side wall, and the guide ribs comprise a plurality of discontinuous positioning protrusions.

9. The power tool of claim 1, wherein:

the battery pack accommodating part also comprises a fourth side wall which is arranged opposite to the third side wall;

the first side wall and a part of the third side wall are integrally formed into a first whole, the third side wall and the other part of the second side wall are integrally formed into a second whole, the first whole and the second whole are detachably connected, and the fourth side wall is connected with the first whole and the second whole.

10. The power tool of claim 9, wherein:

the power tool further includes a locking assembly for locking the battery pack to the first battery pack receiving cavity, the locking assembly being disposed on the third side wall.

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