Electric tool
By setting up a barrier structure on the periphery of the trigger of the power tool, the problem of short circuit and leakage caused by water in the trigger gap in the prior art is solved, and higher reliability and safety are achieved.
Patent Information
- Application Number
- CN202421179996.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The gaps in the triggers of existing power tools are prone to water, resulting in the risk of short circuits and leakage.
A power tool is designed to form a more tortuous and smaller liquid path by setting a barrier structure on the periphery of the trigger, thereby blocking liquid from entering the switch body.
It effectively reduces the risk of liquid entering the switch body, reduces the possibility of short circuit and leakage, and improves the reliability of power tools.
Smart Images
Figure CN222680850U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electric tools, and in particular relates to an electric tool with a trigger waterproof structure. Background Art
[0002] At present, the housings of many power tools mostly adopt a left and right half-shell structure, which is fixed by the two half-shells. The switch for controlling the start and stop is set at the joint interface, and the trigger is held by the two half-shells. Since there is a gap between the trigger and the housing, water may flow into the housing through the gap during water-related operations, and contact the switch electronic components in the housing, resulting in short circuit and leakage risks.
[0003] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content
[0004] Therefore, the utility model aims to solve the technical problem in the prior art that the gap at the trigger is prone to water ingress, resulting in short circuit and leakage.
[0005] In order to solve the above technical problems, the utility model provides an electric tool, comprising:
[0006] case;
[0007] A positioning frame, fixedly disposed in the housing;
[0008] A switch body, fixedly disposed on the positioning frame and located on a first side of the positioning frame;
[0009] a trigger, movably connected to the positioning frame, located at a second side of the positioning frame opposite to the first side, the trigger being exposed through an opening on the housing for operation, a gap being provided between the trigger and the opening, and the trigger being operable to move between a release position and a trigger position for triggering the switch body;
[0010] A barrier structure is protrudingly arranged on the inner surface of the shell and is arranged around the periphery of the trigger. The barrier structure is adjacent to the opening and extends from the second side of the positioning frame to the first side. The barrier structure is bent toward one side of the switch body at a position adjacent to the side surface of the positioning frame to prevent liquid from reaching the switch body from the gap.
[0011] In one embodiment, the barrier structure includes an extension plate and a side panel, the side panel is located on the first side, the extension plate is located on the second side, and the extension plate and the side panel are arranged at an angle.
[0012] In one embodiment, the extension plate is arranged substantially parallel to the end surface of the trigger, and the length of the extension plate is greater than or equal to the length of the moving track of the end surface of the trigger.
[0013] In one embodiment, the barrier structure further includes a spacer plate disposed between the extension plate and the side panel, the included angles between the spacer plate, the extension plate and the side panel are all obtuse angles, and the extension plane at the end of the positioning frame intersects with the plate surface of the spacer plate.
[0014] In one embodiment, the trigger includes a pivot end pivotally connected to the positioning frame, and the bending structure formed by the extension plate, the side panel and the spacer plate is consistent with the contour of the pivot end.
[0015] In one embodiment, the trigger further includes a pivot end pivotally connected to the positioning frame, and an operating end opposite to the pivot end, and a length of the extension plate adjacent to the operating end is greater than a length of the extension plate adjacent to the pivot end.
[0016] In one embodiment, the positioning frame includes a panel area for fixing the switch body, the electric tool also includes a trigger rod connected to the switch body, the positioning frame is provided with a through hole in the panel area for the trigger rod to pass through, the panel area except the through hole is fully enclosed, the trigger blocks the end of the trigger rod, and the trigger controls the switch body through the trigger rod;
[0017] The width of the positioning frame is greater than the width of the trigger, and in the width direction, the projection of the trigger on the plate surface of the positioning frame is located within the plate surface width of the positioning frame.
[0018] In one embodiment, on the first side of the positioning frame, the blocking structure extends from the side surface of the positioning frame toward a side close to the switch body, and a terminal edge of the blocking structure is adjacent to an outer contour of the switch body and is disposed with a gap therebetween.
[0019] In one embodiment, the shell also accommodates an electrical component, the electrical component is located on the first side of the positioning frame, and the barrier structure also includes a positioning plate roughly parallel to the electrical component, and a gap is formed between the positioning plate and the electrical component for positioning the wire.
[0020] In one embodiment, the shell further includes a slot for positioning the positioning frame, the number of the slots is greater than or equal to two, and the slots are spaced apart along the length direction of the positioning frame, the width of the bottom of the slot is smaller than the width of the top of the slot, and the bottom of the slot is interference fit with the positioning frame.
[0021] The technical solution provided by the utility model has the following advantages:
[0022] The electric tool provided by the utility model, by arranging a barrier structure around the periphery of the trigger, makes the path for liquid to enter one side of the switch body more tortuous and the gap smaller, which is conducive to blocking the liquid from flowing to the first side, thereby achieving the effect of isolating the liquid and reducing the risk of short circuit and leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 A schematic diagram of the three-dimensional structure of the electric tool provided by the embodiment of the utility model;
[0025] Figure 2 for Figure 1 The schematic diagram of the internal structure of the power tool housing hiding the second half shell is shown;
[0026] Figure 3 for Figure 1 A schematic diagram of the internal structure of the second half shell of the power tool housing is shown;
[0027] Figure 4 A schematic diagram of the three-dimensional structure of a switch assembly provided in an embodiment of the utility model;
[0028] Figure 5 for Figure 4 The cross-sectional structural schematic diagram of the switch assembly is shown. DETAILED DESCRIPTION
[0029] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0031] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.
[0032] This embodiment provides an electric tool 100 . Figure 1 This is a three-dimensional structural diagram of the electric tool provided by the embodiment of the utility model. Figure 2 for Figure 1 The schematic diagram of the internal structure of the second half shell hidden in the power tool housing is shown. Figure 3 for Figure 1 The schematic diagram of the internal structure of the second half shell of the power tool housing is shown.
[0033] In an exemplary implementation scenario, the power tool 100 is an angle grinder. An angle grinder is a grinding tool used for cutting and grinding, such as for cutting and grinding metal and stone, so an angle grinder is also called a grinder or a disc grinder. In other exemplary implementation scenarios, the power tool can be a slotting machine for slotting walls and floors, or the power tool can be a cutting machine for performing cutting work. For ease of understanding, this embodiment is described by taking the power tool as an angle grinder as an example.
[0034] See also Figures 1 to 3 The electric tool 100 includes a housing 10 , a positioning frame 20 , a switch assembly 30 , a trigger 40 and a barrier structure 50 .
[0035] The housing 10 includes a first half shell 13 and a second half shell 15, which are fixedly connected to each other to form a housing cavity 12. Specifically, an opening 16 is formed at the relative joint of the first half shell 13 and the second half shell 15, and the trigger 40 is exposed through the opening 16 so that the user can operate the trigger 40.
[0036] The positioning frame 20 is used to install the switch assembly 30. Specifically, the positioning frame 20 is fixedly disposed on the housing 10 and is located in the housing cavity 12. The switch assembly 30 is disposed on the positioning frame 20 and is supported and positioned in the housing 10 by the positioning frame 20. Specifically, the positioning frame 20 is plate-shaped as a whole, and has a first plate-shaped surface and a second plate-shaped surface opposite to each other. The first plate-shaped surface is located on the side facing away from the opening 16, and the second plate-shaped surface is located on the side facing the opening 16. For the purpose of convenience of explanation, the plate-shaped surface of the positioning frame 20 is used as a boundary, and the side located on the first plate-shaped surface of the positioning frame 20 is defined as the first side of the positioning frame 20, and the side located on the second plate-shaped surface of the positioning frame 20 is defined as the second side of the positioning frame 20. Based on the above definition, the opening 16 is located on the second side of the positioning frame 20.
[0037] The switch assembly 30 includes a switch body 32 for controlling start and stop. The switch body 32 is fixedly arranged on the positioning frame 20 and is located on the first side of the positioning frame 20. The switch assembly 30 also includes a trigger rod 31 for triggering the switch body 32. The positioning frame 20 is provided with a through hole in the panel area for the trigger rod 31 to pass through. One end of the trigger rod 31 located on the first side is connected to the switch body 32, and the other end of the trigger rod 31 located on the second side cooperates with the trigger 40. The trigger 40 controls the switch body 32 through the trigger rod 31, thereby controlling the operation of the power tool.
[0038] The trigger 40 is used for the user to operate to trigger the switch assembly 30. Specifically, the trigger 40 is movably connected to the positioning frame 20 and is located on the second side of the positioning frame 20. The trigger 40 is exposed through the opening 16 on the housing 10 for the user to operate. The trigger 40 has a release position in which the switch assembly 30 is not triggered and a trigger position in which the switch assembly 30 is triggered. The trigger 40 can be operatively movable between the release position and the trigger position. When the user releases the trigger 40, the trigger 40 automatically returns to the release position. When the user presses the trigger 40, the trigger 40 can move to the trigger position. It should be noted that the trigger 40 may protrude from the opening 16 or may not protrude from the opening 16, such as being flush with the opening 16 or slightly located inside the opening 16, as long as it can be touched by the user and switched to the trigger position. In order to facilitate the triggering operation of the trigger 40, in this embodiment, the trigger 40 protrudes from the opening 16.
[0039] Since the trigger 40 is movably arranged relative to the housing 10, there is an inevitable gap between the trigger 40 and the opening 16. When working with water, water may enter the housing cavity 12 through the gap. Since the switch body 32 is an energized device, if the energized device is exposed to water, leakage or short circuit may occur, resulting in device damage or even electric shock risk.
[0040] In view of the above, the electric tool provided in this embodiment further includes a barrier structure 50 for preventing liquid (water) from entering the housing 10 from the opening 16 to damage the energized components. The barrier structure 50 is protrudingly disposed on the inner surface of the housing 10 and disposed around the periphery of the trigger 40. The barrier structure 50 is adjacent to the opening 16 and extends from the second side of the positioning frame 20 to the first side. The barrier structure 50 is bent toward the switch body 32 at the side surface adjacent to the positioning frame 20 to prevent liquid (water) from reaching the switch body 32 from the gap.
[0041] The barrier structure 50 is arranged around the periphery of the trigger 40, and forms a narrow gap with the outer surface of the trigger 40. The gap allows the trigger 40 to move normally, reducing the probability of external water reaching the energized device through the gap. At the same time, the gap extends the path length from the opening to the energized device, which can significantly improve the water-isolating effect.
[0042] It should be noted that the side surface of the positioning frame 20 is the thickness surface of the positioning frame 20, and is located between the first plate-shaped surface and the second plate-shaped surface. The above-mentioned barrier structure can also isolate dust, and thus also has a dust isolation effect.
[0043] The barrier structure 50 is bent toward the switch body 32 at the side surface of the positioning frame 20, so that the path of the liquid reaching the switch body 32 is more tortuous and the gap is smaller, which is conducive to blocking the liquid from flowing to the first side, thereby achieving the effect of water and dust isolation.
[0044] Please continue to see Figure 2 and Figure 3 Specifically, the barrier structure 50 includes an extension plate 51 and a side panel 53. The side panel 53 is located on the first side, and the extension plate 51 is located on the second side. The extension plate 51 and the side panel 53 are arranged at an angle. Specifically, the side panel 51 extends approximately from the second side to the first side, and the extension plate 51 extends from the side close to the side surface of the positioning frame 20 to the side close to the switch body 32. The extension plate 51 and the side panel 53 form a curved gap with the positioning frame 20 to ensure water and dust isolation effects.
[0045] Furthermore, in order to increase the difficulty of water and dust entering the housing cavity from the gap between the trigger and the housing, in one embodiment, the extension plate 51 is arranged substantially parallel to the end face of the trigger 40, and the length of the extension plate 51 is greater than or equal to the length of the moving track of the end face of the trigger 40. The extension plate 51 is arranged parallel to the end face of the trigger 40, which can ensure that the gap between the extension plate 51 and the end face of the trigger is uniform and consistent, and the gap size is kept small everywhere, which can better prevent dust and water. The extension plate 51 is larger than the moving track of the end face of the trigger 40, does not affect the moving stroke of the trigger 40, and ensures the normal triggering operation of the trigger 40.
[0046] In order to increase the tortuosity of the path entering the first side of the positioning frame and enhance the isolation effect, in one embodiment, see Figure 2 and Figure 3 The barrier structure 50 also includes a spacer plate 55 disposed between the extension plate 51 and the side panel 53, and the angles between the spacer plate 55 and the extension plate 51 and the side panel 53 are all obtuse angles. The spacer plate 55 is located at the periphery of the side surface of the positioning frame 20, and the extension plane of the end of the positioning frame 20 adjacent to the spacer plate 55 intersects with the plate surface of the spacer plate 55. The advantage of such a setting is that the angles between the spacer plate 55 and the extension plate 51 and the side panel 53 are all obtuse angles, which can ensure a longer blocking path. The spacer plate 55 is located at the periphery of the side surface of the positioning frame 20, and a bending gap is formed at the side surface of the positioning frame 20, which increases the difficulty of foreign matter passing through and ensures the isolation effect.
[0047] For specific embodiments, see Figure 2 and Figure 3The trigger 40 is longitudinally extended and has two opposite ends in the length direction of the trigger 40. The positioning frame 20 is provided with a bracket 21 connected to the trigger 40, and the bracket 21 is located at the end of the positioning frame 20. One end of the trigger 40 is pivotally connected to the bracket 21, which can be called a pivot end 42, and the other end of the trigger 40 is used for user operation, which can be called an operating end 41. The movable path of the operating end 41 is larger than the pivot end 42.
[0048] The operating end 41 and the pivot end 42 are the two ends of the trigger 40 that are easily infiltrated by water and dust, and the barrier structure 50 is arranged around the above two ends of the trigger 40. In other words, the barrier structure 50 is arranged around the pivot end 42 and the operating end 41. Specifically, at the pivot end, the bending structure formed by the extension plate 51, the side panel 53 and the spacer plate 55 is consistent with the contour of the pivot end 42, and the extension plate 51, the side panel 53 and the spacer plate 55 are arranged around the periphery of the pivot end with a gap from the pivot end 42. The gap between the barrier structure and the pivot end 42 is in a zigzag shape, and the gap width is roughly evenly distributed, thereby better isolating water and dust.
[0049] The operating end 42 is used for user operation. Since the operating end 42 rotates relative to the pivot end, the operating end 42 has a larger moving track. In order to leave enough moving path length and avoid interference, the length of the extension plate 51 adjacent to the operating end 41 is greater than the length of the extension plate 51 adjacent to the pivot end 42.
[0050] Since the switch body 32 is fixedly arranged on the first side of the positioning frame 20, the positioning frame 20 includes a plate surface area for fixing the switch body 32 on the first plate-shaped surface. Since the trigger 40 controls the switch body 32 through the trigger rod 31, the positioning frame 20 is also provided with a through hole in the plate surface area for the trigger rod 31 to pass through. In order to prevent water and dust from reaching one side of the switch body 32, in one embodiment, the plate surface area except the through hole is closed, the trigger 40 blocks the end of the trigger rod 31, and the trigger rod 31 is not exposed. The trigger 40 blocks the through hole, thereby preventing dust and water from entering the through hole. Further, the width of the positioning frame 20 is greater than the width of the trigger 40. In the width direction, the positioning frame 20 exceeds the outer contour of the trigger 40 on both sides, and the projection of the trigger 40 on the plate surface of the positioning frame 20 is located within the plate surface of the positioning frame 20. In this way, the positioning frame can block the liquid entering from the side of the trigger, and achieve comprehensive water and dust isolation.
[0051] In a specific embodiment, on the first side of the positioning frame 20, the end edge of the barrier structure 50 extends to the vicinity of the outer contour of the switch body 32 and is set with a gap from the outer contour, thereby extending the length of the isolation path as much as possible and improving the isolation effect. Specifically, the barrier structure 50 extends from the side surface of the positioning frame 20 to the side close to the switch body 32, and the end edge of the barrier structure 50 is adjacent to the outer contour of the switch body 32 and is set with a gap from the outer contour of the switch body 32.
[0052] In a specific embodiment, the housing 10 further contains an electrical device 60 and a wire for electrical connection, the electrical device 60 is located on the first side of the positioning frame 20, and the barrier structure 50 further includes a positioning plate 56 substantially parallel to the electrical device 60, and a gap for positioning the wire is formed between the positioning plate 56 and the electrical device 60. In this way, the barrier structure can also position the wire, making the handle cavity space more regular and more convenient for wiring.
[0053] The fixing structure of the positioning frame 20 and the housing 10 is described below. In this embodiment, the housing 10 is formed by a first half shell 13 and a second half shell 15 that are matched with each other. The first half shell 13 and the second half shell 15 are used to fix the positioning frame 20. The second half shell 15 is used as an example for description. The structure of the first half shell 13 can refer to the second half shell 15 and will not be repeated here. Figure 3 As shown, the shell 10 also includes a positioning rib 70 for fixing the positioning frame 20, and each positioning rib 70 is provided with a slot 72, the number of the slots 72 is greater than or equal to two, and they are spaced apart along the length direction of the positioning frame 20, the width of the bottom of the slot 72 is smaller than the width of the upper part of the slot 72, and the bottom of the slot 72 is interference fit with the positioning frame 20.
[0054] When assembling the positioning frame 20, align the side surface (thickness surface) of the positioning frame 20 with the plurality of slots 72, press the positioning frame 20 downward, and insert the positioning frame 20 into the bottom of the slots 72, so that the positioning frame 20 is locked in place. Then, the two half shells (the first half shell 13 and the second half shell 15) are aligned and fixed, and the positioning frame 20 is fixed between the two half shells.
[0055] In order to prevent the electric tool from being started by mistake, in one embodiment, see Figure 2 , 4 and Figure 5 The electric tool further includes a locking member 80, which is movably disposed on the trigger 40. The locking member 80 has a locking position that is limitedly matched with the positioning frame 20 and an unlocking position that is away from the positioning frame 20. When the locking member 80 is in the locking position, the trigger 40 is restricted in the release position. When the locking member is in the unlocking position, the trigger 40 can be operated to move to the trigger position of the trigger switch body.
[0056] Specifically, the locking member 80 is pivotally disposed at the operating end 41 of the trigger 40, and the locking member 80 can be operated to rotate between the locking position and the unlocking position. The locking member 80 includes an operating portion 81 for the user to operate to unlock the locking member, and a limiting portion 82 for limiting the lower surface of the positioning frame 20. The positioning frame 20 is provided with a through hole 22 for the limiting portion 82 to pass through. When the locking member 80 is in the locking position, the limiting portion 82 is abutted against and matched with the lower surface of the positioning frame 20, and the trigger cannot be switched to the trigger position; when the locking member 80 is in the unlocking position, the limiting portion is located in the through hole 22 and can move in the through hole, the trigger 40 rotates to the trigger position, and the limiting portion 82 extends upward from the through hole 22 for a stroke, and the limiting portion 82 no longer interferes with the positioning frame 20, so that the trigger 40 can control the switch body 32 through the trigger rod 31.
[0057] The locking member 80 further includes a hook 821 . The positioning frame 20 is provided with a protrusion 23 on the side wall of the through hole 22 . When the locking member 80 moves to the limit of the unlocking position, the hook 821 engages with the protrusion 23 , thereby keeping the locking member 80 in the unlocking position.
[0058] In summary, the electric tool provided in this embodiment, by providing a blocking structure surrounding the periphery of the trigger, makes the path for liquid to enter one side of the switch body more tortuous and the gap smaller, which is conducive to blocking the liquid from flowing to the first side, thereby achieving the effect of isolating the liquid.
[0059] Obviously, the above described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.
Claims
1. An electric tool, characterized in that: include: case; A positioning frame, fixedly disposed in the housing; A switch body, fixedly disposed on the positioning frame and located on a first side of the positioning frame; a trigger, movably connected to the positioning frame, located at a second side of the positioning frame opposite to the first side, the trigger being exposed through an opening on the housing for operation, a gap being provided between the trigger and the opening, and the trigger being operable to move between a release position and a trigger position for triggering the switch body; A barrier structure is protrudingly arranged on the inner surface of the shell and is arranged around the periphery of the trigger. The barrier structure is adjacent to the opening and extends from the second side of the positioning frame to the first side. The barrier structure is bent toward the switch body at a position adjacent to the side surface of the positioning frame to prevent liquid from reaching the switch body from the gap.
2. The electric tool according to claim 1, characterized in that: The baffle structure comprises an extension plate and a side panel, wherein the side panel is located at the first side, the extension plate is located at the second side, and the extension plate and the side panel are arranged at an angle.
3. The electric tool according to claim 2, characterized in that: The extension plate is arranged substantially parallel to the end surface of the trigger, and the length of the extension plate is greater than or equal to the length of the activity track of the end surface of the trigger.
4. The electric tool according to claim 2, characterized in that: The barrier structure also includes a spacer plate disposed between the extension plate and the side panel, the included angles between the spacer plate, the extension plate and the side panel are all obtuse angles, and the extended plane of the end of the positioning frame intersects with the plate surface of the spacer plate.
5. The electric tool according to claim 4, characterized in that: The trigger comprises a pivot end pivotally connected to the positioning frame, and the bending structure formed by the extension plate, the side panel and the spacer plate is consistent with the contour of the pivot end.
6. The electric tool according to claim 3, characterized in that: The trigger comprises a pivot end pivotally connected to the positioning frame and an operating end opposite to the pivot end, and the length of the extension plate adjacent to the operating end is greater than the length of the extension plate adjacent to the pivot end.
7. The electric tool according to claim 1, characterized in that: The positioning frame includes a panel area for fixing the switch body, the electric tool also includes a trigger rod connected to the switch body, the positioning frame is provided with a through hole in the panel area for the trigger rod to pass through, the panel area except the through hole is closed, the trigger covers the end of the trigger rod, and the trigger controls the switch body through the trigger rod; The width of the positioning frame is greater than the width of the trigger, and in the width direction, the projection of the trigger on the plate surface of the positioning frame is located within the plate surface of the positioning frame.
8. The electric tool according to claim 1, characterized in that: On the first side of the positioning frame, the blocking structure extends from the side surface of the positioning frame toward a side close to the switch body, and a terminal edge of the blocking structure is adjacent to an outer contour of the switch body and is disposed with a gap therebetween.
9. The electric tool according to claim 1, characterized in that: The shell also contains an electrical component, which is located on the first side of the positioning frame. The barrier structure also includes a positioning plate that is substantially parallel to the electrical component, and a gap for positioning the wire is formed between the positioning plate and the electrical component.
10. The electric tool according to claim 1, characterized in that: The shell also includes a slot for positioning the positioning frame. The number of the slots is greater than or equal to two and is spaced apart along the length direction of the positioning frame. The width of the bottom of the slot is smaller than the width of the top of the slot. The bottom of the slot is interference fit with the positioning frame.