Electric tool

Abstract

The utility model discloses an electric tool which comprises a tool shell and a battery pack, a guide groove is formed in the tool shell, and at least one first protrusion is arranged on the inner wall of the guide groove in a protruding and extending mode. The battery pack is provided with a fixing part, the fixing part is detachably inserted into the guide groove, the fixing part is provided with elastic pieces which are the same as the first protrusions in number and correspond to the first protrusions in a one-to-one mode, each elastic piece is provided with a second protrusion protruding out of the surface of the fixing part, and when the fixing part is completely inserted into the guide groove, the second protrusions protrude out of the surface of the fixing part. The second protrusions are located on the sides, away from the inlets of the guide grooves, of the corresponding first protrusions and abut against the first protrusions. The battery pack is matched with the two protrusions on the tool shell, the battery pack can be prevented from being abnormally separated, meanwhile, the battery pack and the tool shell do not need to be tightly matched, and dust or pebbles can be prevented from hindering assembling and disassembling of the battery pack.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tools, in particular to an electric tool. Background Art

[0002] With the development of technology, many power tools have become common tools in people's daily lives and work. Compared with traditional hand tools, power tools are more convenient to use and require less effort. Many existing power tools are powered by lithium batteries. The battery pack mainly relies on the locking tongue on the battery pack to hook the machine, so that the entire battery pack is hung on the machine and does not fall off. In order to form a reliable connection between the battery pack and the machine with high vibration, some battery packs have rails that are tightly fitted with the machine. Although this can increase the insertion and removal force of the battery pack, because the working environment of power tools is usually relatively harsh, dust and even small stones will accumulate between the battery pack rails and the machine rails. At this time, the battery pack will be stuck and difficult to remove. If the rails between the battery pack and the machine are loose, there is a certain probability that the battery pack will fall off if there is a large vibration.

[0003] Therefore, in view of the above technical problems, it is necessary to provide an improved electric tool to solve the above problems.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide an electric tool for solving the assembly problem between a battery pack and a tool body.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by a specific embodiment of the present invention is as follows:

[0007] The utility model provides an electric tool, which includes a tool housing and a battery pack, wherein a guide groove is provided on the tool housing, and at least one first protrusion protrudes from the inner wall of the guide groove; a fixing portion is provided on the battery pack, and the fixing portion is detachably inserted into the guide groove, and the fixing portion is provided with spring sheets having the same number as the first protrusions and corresponding one to one, and each spring sheet is formed with a second protrusion protruding from the surface of the fixing portion, and when the fixing portion is fully inserted into the guide groove, the second protrusion is located on the side of its corresponding first protrusion away from the guide groove entrance, and abuts against the first protrusion.

[0008] In one or more embodiments of the present invention, the inner wall of the guide groove is further provided with a groove located on the side of the first protrusion away from the guide groove entrance, and when the fixing portion is fully inserted into the guide groove, the second protrusion is embedded in the groove.

[0009] In one or more embodiments of the present invention, the fixing portion is a guide rail protruding from the surface of the battery pack, and the elastic sheet is fixed on the guide rail.

[0010] In one or more embodiments of the present invention, the guide rail is provided with a first slot for fixing the elastic sheet, and the elastic sheet is detachably disposed in the first slot.

[0011] In one or more embodiments of the present invention, a connecting portion is connected between the guide rail and the battery pack, and the elastic sheet is provided on both sides or one side of the connecting portion.

[0012] In one or more embodiments of the present invention, the elastic sheet is arranged on a side of the guide rail facing the battery pack, and the second protrusion faces the battery pack.

[0013] In one or more embodiments of the present invention, a retractable third protrusion is provided on the guide rail, and a second slot is provided on the inner wall of the guide groove. When the guide rail is fully inserted into the guide groove, the third protrusion is inserted into the second slot. The guide rail is also provided with a button that connects and drives the third protrusion to be retracted into the guide rail.

[0014] In one or more embodiments of the present invention, the third protrusion includes a blocking surface perpendicular to the guide rail, and a guide surface connected to the blocking surface, and the guide surface extends from the top of the blocking surface to the guide rail along the insertion direction.

[0015] In one or more embodiments of the present invention, the second clamping groove is provided at the entrance of the guide groove.

[0016] In one or more embodiments of the present invention, the height of the first protrusion is no greater than the distance between the guide rail and the inner wall of the guide groove after the guide rail is inserted into the guide groove.

[0017] Compared with the prior art, the electric tool of the present invention is provided with a protruding spring sheet on the battery guide rail, and a matching protrusion is provided in the guide groove of the tool housing. When the battery pack is inserted into place, the two protrusions cooperate with each other to prevent the battery pack from detaching when the fixing structure fails or the vibration is large, and the battery pack and the tool housing do not need to be too tight to avoid dust or pebbles hindering the battery pack from being unloaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of a battery pack in one embodiment of the present invention;

[0020] Figure 2 A partial cross-sectional view of a tool housing in one embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of a guide rail inserted into a guide groove in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a spring in one embodiment of the present invention;

[0023] Figure 5 A partial schematic diagram of a tool housing in one embodiment of the present invention;

[0024] Figure 6 Schematic diagram of a battery pack in one embodiment of the present invention.

[0025] Description of main reference numerals:

[0026] 10-tool housing, 11-guide groove, 12-first protrusion, 13-groove, 14-second slot, 20-battery pack, 21-guide rail, 211-first slot, 22-spring, 221-second protrusion, 23-connecting portion, 24-third protrusion, 241-blocking surface, 242-guide surface, 25-button. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] like Figure 1-6As shown, an electric tool in one embodiment of the present invention is applied to an electric tool to prevent the battery pack from falling off abnormally. The electric tool includes a tool housing 10 and a battery pack 20. The tool housing 10 is provided with a guide groove 11, and the battery pack 20 is provided with a fixing portion that can be inserted into the guide groove 11. At least one first protrusion 12 protrudes from the inner wall of the guide groove 11, and a spring sheet 22 made of elastic material is fixed to the fixing portion. The number of spring sheets 22 is the same as that of the first protrusions 12 and the number corresponds one-to-one. Each spring sheet 22 is formed with a second protrusion 221 protruding from the surface of the fixing portion. When the fixing portion is fully inserted into the guide groove 11, the second protrusion 221 is located on the side of its corresponding first protrusion 12 away from the entrance of the guide groove 11, and abuts against the first protrusion 12.

[0029] During actual use, the specifications and dimensions of the fixing portion and the guide groove 11 are basically the same. Since the second protrusion 221 protrudes from the surface of the fixing portion, the second protrusion 221 is squeezed and deformed when inserted into the fixing portion. When the fixing portion is fully inserted into the guide groove 11, the second protrusion 221 moves accordingly to the side of the first protrusion 12 away from the entrance of the guide groove 11 and abuts against the first protrusion 12, which is used to prevent the battery pack 20 from falling off when the fixing structure between the battery pack 20 and the tool housing 10 fails or when there is a large vibration. In the case of providing the spring clip 22 and the first protrusion 12, a relatively loose connection can be used between the battery pack 20 and the tool housing 10 without being too tight, so as to prevent dust or pebbles from hindering the normal detachment of the battery pack 20 after use.

[0030] like Figure 1 As shown, the battery pack 20 is generally rectangular in structure, with the fixed portion being a guide rail 21 protruding from the surface of the battery pack 20, and the spring 22 fixed to the guide rail 21. A connecting portion 23 extending in the insertion direction is provided between the guide rail 21 and the battery pack 20 to improve the stability of the guide rail 21 and prevent breakage. The connecting portion 23 is provided in the middle position of the guide rail 21 along the insertion direction perpendicular to the guide rail 21, as shown in FIG. Figure 1 In the embodiment shown, the spring piece 22 is disposed on one side of the connecting portion 23 . Of course, spring pieces can also be disposed on both sides of the connecting portion 23 , and this embodiment is not limited thereto.

[0031] Preferably, a groove 13 is provided on the side of the first protrusion 12 away from the entrance of the guide groove 11. When the guide rail 21 is fully inserted into the guide groove 11, the second protrusion 221 is embedded in the groove 13. By providing the groove 13, the spring piece 22 can recover part or all of its deformation after being fully inserted into the guide rail 21, thereby avoiding weakening the elasticity of the spring piece 22 after being in a deformed state for a long time, which leads to a reduction in the anti-falling effect of the structure. Secondly, after being embedded in the groove 13, the second protrusion 221 abuts against the groove 13 and the first protrusion 12 at the same time, the contact area is increased, and the deformation required to be generated when moving outward is also increased. More force is required to disengage the second protrusion 221 from the groove 13 and the first protrusion 12, thereby further improving the anti-falling effect of the structure.

[0032] It is easy to imagine that the first protrusion 12 and the second protrusion 221 are both arc-shaped structures, and the groove 13 is also an arc-shaped groove body, so as to avoid the situation where other right-angle structures cause the second protrusion 221 to be unable to move normally and detach from the groove 13 and the first protrusion 12.

[0033] like Figure 1 As shown, the spring 22 is arranged on the side of the guide rail 21 facing the battery pack 20, and the second protrusion 221 faces the battery pack 20. The guide groove 11 is a groove body with a T-shaped cross section, and two supporting surfaces are formed at the bottom, and the first protrusion 12 and the groove 13 are arranged on the supporting surfaces.

[0034] Alternatively, the spring piece 22 may also be disposed on the top surface or side surface of the guide rail 21 , and it is only necessary to adjust the position of the first protrusion 12 accordingly. This embodiment is not limited thereto.

[0035] In addition to setting a guide rail 21 on the surface of the battery pack 20 and fixing the battery pack 20 by inserting the guide rail 21 into the guide groove 11, the battery pack 20 can also be set into a columnar body and directly inserted into the guide groove 11 for fixing. In this case, the main body of the battery pack 20 is the fixing part, and the spring clip 22 is directly fixed to the surface of the battery pack 20.

[0036] Preferably, a first slot 211 for fixing the spring piece 22 is provided on the guide rail 21 , and the spring piece 22 is detachably provided in the first slot 211 so as to be replaced after the elasticity of the spring piece 22 decreases or cannot be deformed normally, which is more flexible.

[0037] Since the spring clip 22 and the first protrusion 21 are only used to prevent the battery pack 20 from falling out under abnormal circumstances and are not used to secure the battery pack 20 to the tool housing 10, a fixing structure is required between the two. Specifically, it includes a retractable third protrusion 24 provided on the guide rail 21 and a second retaining groove 14 provided on the inner wall of the guide slot 11. The third protrusion 24 is retracted into the guide rail 21 when the guide rail is inserted into the guide slot 11. When the guide rail 21 is fully inserted into the guide slot 11, the third protrusion 24 moves to the position of the second retaining groove 14. The third protrusion 24 is then inserted into the second retaining groove 14, completing the fixation between the battery pack 20 and the tool housing 10. A button 25 is provided on the guide rail 21 and is connected to the third protrusion 24. The button 25 can drive the third protrusion 24 to be retracted into the guide rail 21. When the battery pack 20 needs to be removed, the button 25 is pressed and the battery pack 20 is pulled outward.

[0038] like Figure 1 and 2 As shown, the third protrusion 24 has a triangular cross-section and includes a blocking surface 241 perpendicular to the guide rail 21, and a guide surface 242 connected to the blocking surface 241. The guide surface 242 extends from the top of the blocking surface 241 toward the side of the guide rail 21 along the insertion direction of the guide rail 21. The second engaging slot 14 has the same shape as the third protrusion 24. When the battery pack 20 is inserted, the guide surface 242 abuts the outer wall of the tool housing 10. As the tool moves further inward, the third protrusion 24 is squeezed by the outer wall and retracted toward the guide rail 21. Finally, after reaching the second engaging slot 14, the third protrusion 24 moves outward and inserts into the second engaging slot 14. The vertical blocking surface 241 cooperates with the second engaging slot 14 to prevent the battery pack 20 from moving outward.

[0039] Furthermore, the second latching slot 14 is disposed at the entrance of the guide slot 11 , and may also be disposed at other positions within the guide slot 11 , which is not limited in this embodiment.

[0040] The above only shows the case where the spring pieces 22 are arranged on the lower surface of the guide rail 21. It should be understood that the arrangement position and number of the spring pieces 22 are not affected by the above. Figure 1 As limited in the embodiment, the same or different numbers of spring pieces 22 can be set at other positions of the guide rail 21, and this embodiment does not limit this.

[0041] In order to allow the guide rail 21 to be smoothly inserted into the guide groove 11 without being hindered by the first protrusion 12 , the height of the first protrusion 12 is set to be no greater than the distance between the guide rail 21 and the guide groove 11 when the guide rail 21 is inserted into the guide groove 11 .

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An electric tool, characterized in that: include: A tool housing (10), wherein a guide groove (11) is provided on the tool housing (10), and at least one first protrusion (12) protrudes from the inner wall of the guide groove (11); A battery pack (20) is formed with a fixing portion, the fixing portion being detachably inserted into the guide groove (11), the fixing portion being provided with spring pieces (22) having the same number as and corresponding to the first protrusions (12), each spring piece (22) being formed with a second protrusion (221) protruding from the surface of the fixing portion, and when the fixing portion is fully inserted into the guide groove (11), the second protrusion (221) is located on a side of the corresponding first protrusion (12) away from the entrance of the guide groove (11) and abuts against the first protrusion (12).

2. The electric tool according to claim 1, wherein: The inner wall of the guide groove (11) is further provided with a groove (13) located on the side of the first protrusion (12) away from the entrance of the guide groove (11); when the fixing portion is fully inserted into the guide groove (11), the second protrusion (221) is embedded in the groove (13).

3. The electric tool according to claim 1, wherein: The fixing portion is a guide rail (21) protruding from the surface of the battery pack (20), and the elastic sheet (22) is fixed on the guide rail (21).

4. The electric tool according to claim 3, wherein: The guide rail (21) is provided with a first slot (211) for fixing the elastic sheet (22), and the elastic sheet (22) is detachably arranged in the first slot (211).

5. The electric tool according to claim 3, wherein: A connecting portion (23) is provided between the guide rail (21) and the battery pack (20), and the elastic sheet (22) is provided on both sides or one side of the connecting portion (23).

6. The electric tool according to claim 3, wherein: The elastic sheet (22) is arranged on a side of the guide rail (21) facing the battery pack (20), and the second protrusion (221) faces the battery pack (20).

7. The electric tool according to claim 3, wherein: The guide rail (21) is provided with a third convex protrusion (24) that can be accommodated, and the inner wall of the guide groove (11) is provided with a second clamping groove (14). When the guide rail (21) is fully inserted into the guide groove (11), the third convex protrusion (24) is inserted into the second clamping groove (14). The guide rail (21) is also provided with a button (25) that connects and drives the third convex protrusion (24) to be accommodated in the guide rail (21).

8. The electric tool according to claim 7, wherein: The third protrusion (24) includes a blocking surface (241) perpendicular to the guide rail (21), and a guide surface (242) connected to the blocking surface (241), wherein the guide surface (242) extends from the top of the blocking surface (241) to the guide rail (21) along the insertion direction.

9. The electric tool according to claim 7, wherein: The second clamping groove (14) is arranged at the entrance of the guide groove (11).

10. The electric tool according to claim 3, wherein: The height of the first protrusion (12) is no greater than the distance between the guide rail (21) and the inner wall of the guide groove (11) after the guide rail (21) is inserted into the guide groove (11).

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