Battery pack

Abstract

The utility model discloses a battery pack which comprises a battery box. The battery box comprises a shell, a channel space and a key group. And the shell is columnar. The channel space penetrates through the shell in the radial direction of the shell. The key group is provided with a plurality of key units which are movably arranged in the channel space and move along the radial direction. And when the key group moves in the channel space along the radial direction, the peripheral surface of one side of the key group is arranged in the channel space in a limiting manner. By means of the structural design of the shell and the key set, the pressing unit of the key set is limited in the channel space in the radial direction, and the problem that the pressing unit is broken or loosened due to multiple times of pressing or improper force application can be avoided.

Description

Technical Field

[0001] This utility model relates to a housing with a cover, specifically a battery box for assembling batteries. Background Technology

[0002] To improve the portability of power tools, portable power tools typically have a removable battery pack at the bottom of their handle for external power supply. This battery pack generally includes a chassis with embedded control circuitry, a battery housing attached to the chassis for accommodating multiple batteries, and two pressable connectors extending outward from an outer circumferential surface of the battery housing. Each connector has a latching portion at its end away from the outer circumferential surface.

[0003] Specifically, the bottom of the grip has a groove for inserting the battery case housing. When the battery case housing is inserted into the groove, multiple engagement members are pressed inward by an inward pushing force, and the engagement members engage with the internal components of the groove to fix the battery case housing in the groove of the grip.

[0004] However, since the multiple connectors are integrally formed with the battery box housing, during the repeated disassembly and assembly of the battery box housing from the handle, the multiple connectors will be repeatedly pressed. The multiple connectors are prone to breakage at the connection with the battery box housing due to deformation or improper force, or loosening from the groove, which affects the stability of the battery box housing fastened to the handle. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a battery pack that improves the stability of the connection with power tools.

[0006] Therefore, the battery pack of this utility model includes a battery box that houses multiple batteries. The battery box includes a housing, a channel space, and a button group.

[0007] The shell is cylindrical.

[0008] The channel space extends through the housing along one radial direction.

[0009] The button assembly is movably disposed in the channel space and moves along the radial direction. When the button assembly moves along the radial direction in the channel space, one side of its circumferential surface is limited within the channel space.

[0010] The advantages of this invention are: by utilizing the structural design of the housing and the button assembly, the button assembly can be subjected to force and move radially along the housing, making it more convenient for the user to apply force. The button assembly is also confined within the channel space, thus improving the problem of the button assembly breaking or loosening due to repeated pressing or improper force application. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram illustrating the first embodiment of the battery box of the battery pack of this utility model;

[0012] Figure 2 It is an exploded perspective view illustrating the relative positions of the detailed components in this embodiment;

[0013] Figure 3 This is a bottom view schematic diagram illustrating a housing of this embodiment;

[0014] Figure 4 This is a three-dimensional schematic diagram illustrating a second embodiment of the battery box of the battery pack; and

[0015] Figure 5 It is an exploded perspective view to illustrate the relative positions of the detailed components of the battery box in the second embodiment.

[0016] Symbol explanation:

[0017] 10. Shell

[0018] 11a Upper shell

[0019] 11b Lower shell

[0020] 11c Platform Department

[0021] 111 Opening

[0022] 112 Storage space

[0023] 12 platforms

[0024] 20-channel space

[0025] 21 First Exit

[0026] 22 Second Exit

[0027] 30-button group

[0028] 31 Pressing Unit

[0029] 311 Elastic component

[0030] 312 Pressing component

[0031] 313 Pressing part

[0032] 314 Buckle section

[0033] 315 Side circumferential surface

[0034] 40 base

[0035] 41. Base lower shell

[0036] 411 Groove

[0037] 42-inch battery pack

[0038] 43 Limiting seat

[0039] 44 Lateral wall

[0040] 50 joint units

[0041] 51 First joint

[0042] 52 Second joint

[0043] R radial

[0044] B battery Detailed Implementation

[0045] The technical content and effects of this utility model will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. It should be noted that the drawings are only for illustrating the structural and / or positional relationships between components and are not related to the actual dimensions of each component.

[0046] See Figure 1 , Figure 2 and Figure 3 The first embodiment of the battery pack of this utility model includes a battery box that houses a plurality of batteries B. The battery box can be used to fasten to the bottom of the handle of a power tool (not shown) as an external power source, but is not limited thereto.

[0047] The battery box includes a housing 10, a channel space 20, a button group 30, a base 40, and a connecting unit 50.

[0048] The housing 10 has an opening 111 and a platform 12. The housing 10 is columnar, the opening 111 is located at one end of the housing 10, and the platform 12 extends outward from the bottom edge of the housing 10 and adjacent to the opening 111.

[0049] The housing 10 defines a receiving space 112 that communicates externally through the opening 111 and is used to accommodate a plurality of the batteries B.

[0050] More specifically, in this first embodiment, the housing 10 is composed of an upper housing portion 11a, a lower housing portion 11b, and two platform portions 11c extending from the side peripheral surface of the upper housing portion 11a to the top edge of the lower housing portion 11b. The outer diameter of the upper housing portion 11a is smaller than the outer diameter of the lower housing portion 11b, and the side peripheral surface of the upper housing portion 11a forms two recesses that are positioned opposite to the plurality of platform portions 11c.

[0051] The channel space 20 extends through the housing 10 along a radial direction R. The channel space 20 has a plurality of first openings 21 and a plurality of second openings 22, with the first openings 21 and second openings 22 located at opposite ends of the channel space 20 and corresponding to the sides of the accommodating space 112. Each second opening 22 extends radially R along the housing 10, and is connected to the plurality of first openings 21 but not to each other.

[0052] In this first embodiment, the example is that the channel space 20 forms two first openings 21 and two second openings 22 located on both sides of the accommodating space 112. Each first opening 21 is formed on the side peripheral surface of the lower shell portion 11b, and each second opening 22 is formed on the corresponding platform portion 11c.

[0053] In addition, the multiple first and second ports 21 and 22 are respectively formed in the recesses of the housing 10 and adjacent to the lower housing portion 11b, thereby providing a larger volume of installation space for accommodating the button assembly 30, which helps manufacturers to select pressing elements with a longer movable distance.

[0054] It should be noted that, in actual implementation, the number and relative position of the multiple first and second ports 21 and 22 are not limited to those shown in this embodiment and the reference drawings.

[0055] The button assembly 30 is movably disposed in the channel space 20 and moves radially R along the housing 10. When the button assembly 30 moves radially R in the channel space 20, one of its peripheral surfaces 315 is limited within the channel space 20.

[0056] In this first embodiment, the button assembly 30 includes a plurality of pressing units 31 located at both ends of the channel space 20 and correspondingly located on both sides of the accommodating space 112. Each pressing unit 31 has an elastic element 311 that can extend and retract along the radial direction R, and a pressing element 312 connected to the elastic element 311 and exposed from the corresponding first opening 21. Each pressing unit 31 is disposed adjacent to a corresponding recess of the housing 10.

[0057] The axial direction of each elastic element 311 is the same as the radial direction R of the housing 10, which can drive each pressing element 312 to move along the radial direction R. Since each pressing element 312 is confined within its corresponding first opening 21, it is not easy for it to detach from its predetermined position due to improper force application. In addition, each pressing element 312 and the housing 10 are independent components connected by the elastic element 311 rather than being a one-piece structure.

[0058] More specifically, each pressing unit 31's pressing member 312 is composed of a pressing portion 313 and a latching portion 314 extending from the pressing portion 313. The pressing portion 313 is connected to the elastic member 311 and protrudes from a corresponding first opening 21. The latching portion 314 extends outward from a corresponding second opening 22, is limited by the extending direction of the corresponding second opening 22, and moves along the radial direction R.

[0059] The base 40 includes a lower base shell 41 defining a recess 411, a bottom battery pack 42 disposed within the recess 411, and a retaining seat 43 disposed on the bottom battery pack 42. The bottom battery pack 42 can accommodate another set of batteries. When the housing 10 is engaged with the base 40 with the opening 111 facing the base 40, the retaining seat 43 is located in the accommodating space 112 for securing multiple batteries B. In this first embodiment, the side of the retaining seat 43 has two recesses, and the two recesses of the retaining seat 43 are respectively positioned opposite to the two recesses of the housing 10.

[0060] The joining unit 50 has a plurality of first joining members 51 disposed on the base 40, and a plurality of second joining members 52 disposed on the platform 12 and located opposite the plurality of first joining members 51. Each first joining member 51 and the opposite second joining member 52 can engage with each other, so that the housing 10 is fixed to the base 40 with the opening 111 facing the base 40.

[0061] In this first embodiment, the example is given by taking multiple first coupling members 51 as screws and multiple second coupling members 52 as fixing holes provided on the platform 12 opposite to the housing 10 and capable of engaging with multiple screws, but this is not a limitation.

[0062] In use, the battery case is inserted into a mounting groove (not shown) formed at the bottom of the handle with the housing 10 facing the power tool. When the battery case is inserted into the mounting groove, a radial force is applied to the plurality of pressing units 31, causing each pressing member 312 to move inward along the radial force R and abut against the outer peripheral surface of the housing 10 with the corresponding recess as a limiting support point (also for the position of the recess of the limiting seat 43). When the battery case is extended to the predetermined position, the pushing force is removed, and each elastic member 311 rebounds to drive the corresponding pressing member 312 to move outward along the radial force R, so that the latching part 314 of each pressing member 312 engages with the latch in the mounting groove, thereby securely mounting the battery case to the power tool. When the battery box is to be removed from the power tool, a pushing force along the radial direction R is applied to each pressing member 312 again. After being pressed, each pressing member 312 moves inward along the radial direction R again, causing the latching part 314 of each pressing member 312 to disengage from the latch in the mounting groove. The pushing force is removed after the battery box is moved out of the mounting groove, and each pressing member 312 is pushed back to its initial position by the action of the corresponding elastic member 311.

[0063] Since the axial direction (i.e., the extension direction) of each elastic element 311 is in the same direction as the radial direction R, and the multiple second openings 22 also extend along the radial direction R, the movement direction of the latching portion 314 of each pressing element 312 is restricted, and the direction of force applied to the multiple pressing units 31 can be fixed to be applied along the radial direction R. Therefore, the user can apply force more easily when pressing the multiple pressing units 31. In addition, each pressing element 312 is confined within the corresponding first opening 21, and is an independent component connected to the housing 10 via the elastic element 311 rather than an integrally formed structure. Therefore, the user can press each pressing element 312 more easily and effortlessly, and the occurrence of breakage or misalignment of each pressing element 312 after repeated pressing is reduced. This also prevents the battery box from coming loose from the mounting slot of the power tool during use, thereby improving the stability of the battery box in connection with the power tool.

[0064] In other embodiments, the total volume of the plurality of channel spaces 20 is not less than 10% of the volume of the accommodating space 112. Therefore, a stress buffer space can be provided to the housing 10, and sufficient telescopic actuation space can be provided to the plurality of pressing units 31, so as to prevent the plurality of pressing units 31 from losing their ability to engage with the power tool due to long-term confinement to space compression.

[0065] See Figure 4 and Figure 5 This is a second embodiment of the battery box of the present invention. The difference between this second embodiment and the first embodiment is that the bottom edge of the battery box housing 10 is not formed as shown in the first embodiment. Figure 1 The platform 12 shown has a base 40 that is a platform with a shape corresponding to the opening 111, and it is not provided with anything like... Figure 2 The bottom battery pack 42 and the base housing 41 are shown. The base 40 is directly attached to the bottom edge of the housing 10 to close the opening 111.

[0066] More specifically, the base 40 has a limiting seat 43 on its side near the housing 10 to support and secure multiple batteries B. One side peripheral wall 44 of the base 40 extends in the same direction as the housing 10, which is erected on the base 40, allowing it to be held by a user. In this second embodiment, each first engaging member 51 of the engaging unit 50 is disposed on the platform (the base 40), and each second engaging member 52 is disposed on the bottom edge of the housing 10, and can engage with the opposing first engaging members 51, so that the base 40 can be secured to the bottom edge of the housing 10 via the engaging unit 50.

[0067] In summary, the battery box of this utility model utilizes the structural design of the housing 10 and the button assembly 30 to allow each button unit 31 to be subjected to force and move along the radial direction R of the housing 10, making it more convenient for the user to apply force. Each pressing member 312 and the housing 10 are independent components and are confined within the corresponding first opening 21, thus ensuring that each pressing unit 31 moves in a specific direction (i.e., the radial direction R), avoiding the problem of multiple pressing units 31 breaking or loosening due to repeated pressing or improper force direction, thereby improving the stability of the battery box in connection with the power tool. In addition, the multiple channel spaces 20 are arranged adjacent to the recess of the housing 10, providing a larger volume of configuration space for the elastic member 311, and also allowing the elastic member 311 to have sufficient space to expand and contract, thereby reducing the impact on the connection between the battery box and the power tool, thus effectively achieving the purpose of this utility model.

Claims

1. A battery pack characterized by comprising: A battery holder includes a housing, a channel space, and a button set, wherein: The housing is cylindrical, has an opening, and defines a receiving space for receiving a plurality of batteries, the receiving space being in communication with the outside through the opening; The channel space is formed through the housing along a radial direction of the housing, and has a plurality of first openings respectively formed at two ends of the channel space; The button set is movably arranged in the channel space along the radial direction, and has a side surface limited in the channel space when the button set moves in the channel space along the radial direction, wherein: The button set has a plurality of pressing units respectively corresponding to two sides of the receiving space, each pressing unit has an elastic member that is retractable along the radial direction, and a pressing member connected with the elastic member, and each pressing member is exposed from a corresponding first opening and is independent of the housing.

2. The battery pack of claim 1, wherein, The battery holder further includes a base, and the housing is vertically arranged on the base.

3. The battery pack of claim 1, wherein, The channel space further has a plurality of second openings respectively corresponding to the first openings and extending along the radial direction of the housing, and each pressing unit of the button set includes a pressing portion and a clamping portion, the pressing portion is connected with the elastic member and is exposed from the corresponding first opening, and the clamping portion is exposed from the corresponding second opening and is movable along the radial direction.

4. The battery pack of claim 1, wherein, The housing has a plurality of recesses formed on a side surface thereof, and each pressing unit of the button set is arranged in a corresponding recess.

5. The battery pack of claim 2, wherein, The base includes a plurality of limiting seats arranged on two sides of the receiving space and used for fixing the plurality of batteries.

6. The battery pack of claim 2, wherein, The battery holder further includes a joint unit, the joint unit has a plurality of first joint members arranged on the base, and a plurality of second joint members arranged on the housing and adjacent to the opening, each second joint member is arranged opposite to a corresponding first joint member and is engageable with the corresponding first joint member.

7. The battery pack of claim 2, wherein, The housing further has a platform extending outwardly from a bottom edge thereof, and the battery holder further includes a joint unit, the joint unit has a plurality of first joint members arranged on the base, and a plurality of second joint members arranged on the platform and arranged opposite to the first joint members, each first joint member is engageable with a corresponding second joint member.

8. The battery pack of claim 1, wherein, The total volume of the channel space is not less than 10% of the volume of the receiving space.

Images