CN113498290B

CN113498290B - Waterproof construction and electric tool who contains this waterproof construction

Info

Publication number: CN113498290B
Application number: CN202110804294.3A
Authority: CN
Inventors: 吴平
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-11-15
Anticipated expiration: 2041-07-16
Also published as: CN113498290A

Abstract

The invention relates to the protection field of electric tools, in particular to a waterproof structure and an electric tool comprising the same, wherein the waterproof structure comprises: the first shell is provided with a first opening, the second shell is arranged in the first shell, and the second shell is provided with a second opening; the third shell is arranged on the first shell and the second shell and is butted with the first opening and the second opening respectively; the charged body is arranged in a cavity defined by the second shell and the third shell; the second opening is recessed into the first opening, and a first spigot is arranged at the butt joint position of the third shell and the second shell. This waterproof construction can protect electrified body, reduces the contact of electrified body and rivers, reduces the risk of short circuit. The invention also provides an electric tool comprising the waterproof structure, which can meet the more severe rain test and improve the safety and reliability of the electric tool.

Description

Waterproof construction and electric tool who contains this waterproof construction

Technical Field

The invention relates to the technical field of protection of electric tools, in particular to a waterproof structure and an electric tool comprising the same.

Background

At present, some electric appliances such as garden tools, electric tools, household appliances, etc. are inevitably in contact with water during use or washing. If the electrical equipment leaks, water is easy to contact with the electrical component after permeating into the electrical equipment, so that potential safety hazards such as short circuit or electric leakage are generated, and the normal operation of the electrical equipment is influenced.

In order to meet the safety requirements, the equipment can be subjected to a rain test before leaving a factory, and the rain test can be divided into IPX1, IPX2, IPX3, IPX4, IPX5 and the like according to the water flow intensity. For the test grades IPX 1-IPX 4, as the water flow impact force of the waterproof test is small, the common sealing structure can meet the requirement, for example, parts are made when being attached to each other, or a seam allowance is made at the joint. However, for the higher-level rain test requirements, such as IPX5 and the like, because the water flow is large, the water cannot enter the cavity by only depending on the common sealing structure, and the sealing performance is realized by adding a sealing ring or adding glue in many times, the difficulty of processing and assembling is increased on the one hand, and in addition, the manufacturing cost is also increased, which is very inconvenient.

Disclosure of Invention

In view of the above disadvantages of the prior art, an object of the present invention is to provide a waterproof structure and an electric power tool including the same, so as to solve the problem that the existing electric equipment cannot meet the high-intensity rain test, which causes water to penetrate into the inside of the equipment and contact with a charged body to cause short circuit.

To achieve the above and other related objects, the present invention provides a waterproof structure and a power tool including the same, wherein the waterproof structure includes: the device comprises a first shell, a second shell, a third shell and a charged body. The first shell is provided with a first opening, the second shell is arranged in the first shell, and the second shell is provided with a second opening; the third shell is arranged on the first shell or/and the second shell and is butted with the first opening and the second opening respectively; the charged body is arranged in a cavity defined by the second shell and the third shell; the second opening is recessed into the first opening, and a first spigot is arranged at the butt joint position of the third shell and the second shell.

In one example of the present invention, the first housing includes a base and a cover mounted on the base, the second shell is arranged in the cavity between the cover body and the base.

In one example of the present invention, the first seam allowance includes a seam allowance groove provided on the second housing and a seam allowance boss provided on the third housing to be fitted with the seam allowance groove.

In an example of the present invention, the charged body is a lamp bead mounted on a circuit board, and a mounting bracket of the circuit board is disposed in the second housing.

In an example of the invention, the mounting bracket of the circuit board comprises baffle plate assemblies stopping at two ends of the circuit board and a supporting frame clamped in the middle of the circuit board.

In an example of the invention, the baffle plate assembly comprises a first baffle plate and a second baffle plate which are oppositely arranged on the second shell, and an L-shaped stop surface is arranged on one side of the first baffle plate, the second baffle plate and the circuit board, which are in contact with each other.

In an example of the present invention, the supporting frame includes a first supporting frame and a second supporting frame which are oppositely disposed on the second housing, and a stop block protruding out of the plane of the supporting frame is respectively disposed on one side of the first supporting frame and one side of the second supporting frame facing the circuit board, and the stop block and the supporting frame form an L-shaped slot.

In an example of the present invention, the mounting bracket of the circuit board and the second housing are an integral structure.

In an example of the present invention, the waterproof structure further includes a second housing inner cover mounted between the second housing and the third housing.

In an example of the present invention, the second housing is provided with a plurality of first positioning posts, the second housing inner cover is provided with a second positioning post corresponding to the first positioning posts, and the third housing is provided with a third positioning post corresponding to the second positioning posts.

In an example of the present invention, a side of the base facing away from the second housing is provided with a water outlet.

In an example of the present invention, a second casing supporting rib is disposed at a position of the base corresponding to the second casing, and a height of the second casing supporting rib is gradually reduced from an end away from the water outlet to an end facing the water outlet.

In an example of the present invention, a second housing baffle is disposed at an end of the second housing support rib facing the water outlet, and a mating surface conforming to the shape of the second housing is disposed on the second housing baffle.

In an example of the present invention, a first engaging groove is disposed between the second casing baffle and the second casing support rib, and a first protruding platform matched with the first engaging groove is disposed at a position of the second casing corresponding to the first engaging groove.

In an example of the present invention, a second housing fixing plate is disposed on a side of the cover body connected to the third housing, a second slot is disposed on the second housing fixing plate, and correspondingly, a second boss is disposed on the second housing corresponding to the second slot.

In an example of the present invention, the cover and the third shell are connected by a second seam allowance, and the second seam allowance includes a seam allowance groove provided on the cover and a seam allowance boss provided on the third shell and matching with the seam allowance groove.

In one example of the present invention, the second seam allowance is perpendicular to the first seam allowance.

The present invention also provides an electric power tool including: the device comprises a shell, a push rod connected with the shell, a walking roller arranged at the bottom of the shell, a driving assembly, a transmission assembly and a working assembly which are arranged inside the shell, and a waterproof structure arranged on the shell. This, waterproof construction includes: the device comprises a first shell, a second shell, a third shell and a charged body. The first shell is provided with a first opening, the second shell is arranged in the first shell, and the second shell is provided with a second opening; the third shell is arranged on the first shell or/and the second shell and is butted with the first opening and the second opening respectively; the charged body is arranged in a cavity defined by the first shell and the third shell; the second opening is recessed into the first opening, and a first spigot is arranged at the butt joint position of the third shell and the second shell.

In an example of the electric tool of the present invention, the charged body is a charged bead.

In an example of the power tool of the present invention, the third housing is made of a transparent material.

In summary, in the waterproof structure provided by the invention, the charged body is arranged in the closed chamber surrounded by the second shell and the third shell, the connecting position of the third shell and the second shell is provided with the seam allowance structure, and the seam allowance structure between the second shell and the third shell is positioned in the first shell, so that when a rain test is performed, water flow cannot directly impact the seam allowance structure between the second shell and the third shell due to the blockage of the first shell; even if there is rivers to get into in the first casing from the gap of junction, because the space grow suddenly, water pressure greatly descends, and the tang structure of the tiny rivers of low pressure can't impact second casing and third casing again avoids rivers to get into the electrified body and causes the short circuit. The invention also provides an electric tool comprising the waterproof structure, which can protect the electrified body through the waterproof structure, prevent the electrified body from being short-circuited due to being stained with water and ensure the normal work of the electric tool.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a waterproof structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the waterproof structure according to an embodiment of the present invention with the third housing removed;

FIG. 3 is a schematic structural diagram of a second housing according to an embodiment of the waterproof structure of the present invention;

FIG. 4 is a schematic structural diagram of a second shell and a lamp bead in an embodiment of the waterproof structure of the present invention;

FIG. 5 is a schematic view illustrating the installation of the second housing, the second housing inner cover and the third housing in an embodiment of the waterproof structure of the present invention;

fig. 6 is a schematic structural view of an inner cover of the second housing in an embodiment of the waterproof structure of the present invention;

fig. 7 is a schematic structural view of the second housing and the second housing inner cover in one embodiment of the waterproof structure of the present invention;

fig. 8 is a schematic structural view of a third shell in an embodiment of the waterproof structure of the present invention;

FIG. 9 is a schematic structural diagram of a base in an embodiment of the waterproof structure of the present invention;

FIG. 10 is a schematic view of the waterproof structure according to another angle;

FIG. 11 is a left side view of FIG. 9;

FIG. 12 is a schematic view of a cover according to an embodiment of the waterproof structure of the present invention;

FIG. 13 is a schematic view of the interior of the cover in an embodiment of the waterproof structure of the present invention;

fig. 14 is a schematic structural view of a cover and a second housing in an embodiment of a waterproof structure of the invention;

FIG. 15 is a sectional view of an embodiment of the waterproof structure of the present invention;

FIG. 16 is a sectional view of another embodiment of the waterproof structure of the present invention;

fig. 17 is a schematic structural diagram of an electric tool according to an embodiment of the invention.

Description of the element reference numerals

100. A waterproof structure; 200 of a shell; 300. a push rod; 400. driving the roller; 110. a base; 120. a second housing; 130. a charged body; 140. a third housing; 150. a cover body; 160. a second housing inner cover; 170. a first spigot; 1701. a spigot groove; 1702. a spigot boss; 180. a second spigot; 190. installing a handle; 111. a water outlet; 112. a second housing support rib; 113. a second shell baffle; 114. a first card slot; 115. a rib position baffle plate; 1151. a first rib position baffle; 1152. a second rib position baffle; 1153. a third rib position baffle; 1154. a fourth rib position baffle; 1155. a fifth rib position baffle; 116. a fourth positioning column; 117. a U-shaped mounting groove; 1171. a first water baffle; 1172. a second water baffle; 1173. a third water baffle; 118. a first opening; 121. mounting a bracket; 1211. a first baffle plate; 1212. a second baffle; 1213. a first support frame; 1214. a second support frame; 1215. an L-shaped stop surface; 1216. an L-shaped clamping groove; 1217. a stopper plate; 122. a first positioning post; 123. positioning holes; 124. a first boss; 125. a second boss; 126. a second opening; 131. a circuit board; 132. a lamp bead; 161. a second positioning column; 162. lamp bead positioning holes; 141. a third positioning column; 151. a second housing fixing plate; 152. a second card slot; 153. a fifth positioning column; 154. a baffle plate; 155. and (4) mounting the groove.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so that the present disclosure is not limited to the technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes, can still fall within the scope of the present disclosure without affecting the function and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial change in the technical content.

In view of the above drawbacks in the background art, an object of the present invention is to provide a waterproof structure of a charged body and an electric power tool including the same, so as to solve the problem of short circuit of the charged body caused by water leakage of the waterproof structure in the conventional electric power tool.

Referring to fig. 1 and fig. 2, the waterproof structure 100 of the present invention includes a first housing, a second housing 120, a third housing 140 and a charged body 130, wherein the first housing is provided with a first opening 118, the second housing 120 is installed inside the first housing, the second housing 120 is provided with a second opening 126, and the second opening 126 and the first opening 118 face to the same direction; the third housing 140 is mounted on the first and second housings 120 and respectively interfaces with the first and

second openings

118 and 126; the charged body 130 is installed in a chamber enclosed by the second housing 120 and the third housing 140; the first opening 118 and the second opening 126 are closed-loop contours, the second opening 126 is recessed into the first opening 118, and a first spigot 170 is disposed at the joint position of the third housing 140 and the second housing 120. Since the second opening 126 is located inside the first opening 118, the water flow is blocked by the first housing and does not directly impact the first spigot 170.

Referring to fig. 1 and 2, the first housing includes a base 110 and a cover 150, the cover 150 is mounted on the base 110, one side of the cover is connected to the base 110, the other side of the cover forms a first opening 118 with the base 110, the second housing 120 is mounted in a cavity between the cover 150 and the base 110, and the second housing 120 is enclosed in the cavity formed by the base 110 and the cover 150 by the butt joint of the third housing 140 and the first opening 118. The base 110 and the cover 150 may be an integral structure or may be detachably connected.

Referring to fig. 2, 3 and 8, the charging body 130 is installed in the chamber between the second housing 120 and the third housing 140, and a first stop 170 is disposed at the butt joint position of the second housing 120 and the third housing 140 to prevent water from entering the charging body 130 from the joint of the two. Wherein, the first stop 170 comprises a stop groove 1701 arranged on the second shell 120 and a stop boss 1702 arranged on the third shell 140 and matched with the stop groove 1701, when the third shell 140 is installed, the stop boss 1702 on the third shell 140 is inserted into the stop groove 1701 of the second shell 120, thereby realizing the connection of the third shell 140 and the second shell 120. The second housing 120 and the third housing 140 are connected by a seam allowance, which can prevent part of the water flow from entering the chamber to contact the charged body 130.

Referring to fig. 3 to 4, the second housing 120 is provided with a mounting bracket 121 for the charging body 130, and the charging body 130 is fixed in the second housing 120 through the mounting bracket 121. For example, the charged body 130 is a lamp bead 132 installed on the circuit board 131, and the mounting bracket 121 includes a baffle assembly stopping at two ends of the circuit board 131 and a supporting frame clamped in the middle of the circuit board 131. The baffle plate assembly comprises a first baffle 1211 and a second baffle 1212 which are oppositely arranged on the second shell 120, wherein the sides of the first baffle 1211 and the second baffle 1212, which are in contact with the circuit board 131, are respectively provided with an L-shaped stop surface 1215, and two ends of the circuit board 131 are respectively embedded into the L-shaped stop surfaces 1215 of the two sets of baffle assemblies; the supporting frame includes a first supporting frame 1213 and a second supporting frame 1214 which are oppositely disposed on the second casing 120, wherein the first supporting frame 1213 and the second supporting frame 1214 are respectively provided with a stopping body protruding from the surface of the supporting frame at a side where the first supporting frame 1213 and the second supporting frame 1214 contact with the circuit board 131, an L-shaped slot 1216 is formed between the stopping body and the supporting frame, and the upper end and the lower end of the circuit board 131 are respectively clamped in the L-shaped slot 1216 on the first supporting frame 1213 and the second supporting frame 1214. During installation, two ends of the circuit board 131 respectively abut against the L-shaped stop surfaces 1215, the middle portion of the circuit board 131 is clamped in the L-shaped clamping groove 1216, in order to prevent the circuit board 131 from loosening, a stop plate 1217 may be further disposed between the first support frame 1213 and the second support frame 1214, and a stop surface matched with the circuit board 131 is disposed on one side of the stop plate 1217 contacting the circuit board 131. Preferably, the mounting bracket 121 includes a plurality of sets of supporting frames distributed at intervals, and the mounting bracket 121 and the second housing 120 are an integral structure.

Referring to fig. 4 to 7, the waterproof structure 100 of the present invention further includes a second inner casing cover 160, wherein the second inner casing cover 160 is installed between the second casing 120 and the third casing 140 and connected to the second casing 120 and the third casing 140 through positioning posts. The position of the second shell inner cover 160 corresponding to the lamp bead 132 is provided with a lamp bead positioning hole 162, the position of the outer surface of the second shell inner cover 160 corresponding to the lamp bead positioning hole 162 is inwards recessed, and the periphery of the lamp bead positioning hole 162 is shielded by the side wall of the second shell inner cover 160. The second housing inner cover 160 cooperates with the mounting bracket 121 on the second housing 120 to fix the lamp bead circuit board 131 in the second housing 120, and prevents moisture entering the third housing 140 from entering the circuit board 131, thereby providing a second layer of protection.

Referring to fig. 2, fig. 3 and fig. 5 to fig. 8, the second housing inner cover 160 is connected to the second housing 120 and the third housing 150 through positioning posts, for example, a plurality of positioning posts, which are denoted as first positioning posts 122, are disposed inside the second housing 120, in order to adapt to the shape of the second housing 120, a positioning hole 123 may be disposed in the middle of the second housing 120 instead of the positioning posts, correspondingly, a second positioning post 161 corresponding to the positioning hole 123 is disposed on a position of the second housing inner cover 160 corresponding to the first positioning post 122, and a third positioning post 141 corresponding to the positioning hole 161 is disposed on a position of the third housing 140 corresponding to the second positioning post 161. During installation, the second positioning posts 161 on the second housing inner cover 160 are inserted into the positioning slots or the positioning holes 123 of the first positioning posts 122 in a one-to-one correspondence manner, at this time, the lamp beads 132 are clamped in the lamp bead positioning holes 162 on the second housing inner cover 160 in a one-to-one manner, and then the third positioning posts 141 on the third housing 140 are correspondingly inserted into the positioning slots of the second positioning posts 161, meanwhile, the spigot bosses 1702 at the edge of the third housing 140 are matched with the spigot grooves 1701 at the edge of the second housing 120 to realize spigot connection, so that the second housing 120, the second housing inner cover 160 and the third housing 140 are detachably connected.

Referring to fig. 2, 3, 9 and 10, a drainage opening 111 is disposed on a side of the base 110 away from the second housing 120, so that water can be drained through the drainage opening 111 when entering the interior of the waterproof structure 100 from the gap at each connection. A plurality of second shell supporting ribs 112 are arranged on the base 110 in parallel at positions corresponding to the second shell 120, and the height of the second shell supporting ribs 112 is gradually reduced from one end departing from the water outlet 111 to one end facing the water outlet 111; one end of the second casing support rib 112 facing the water outlet 111 is provided with a second casing baffle 113, one side of the second casing baffle 113 contacting the second casing 120 is provided with a matching surface in accordance with the shape of the second casing 120, a slot for installing the second casing 120 is provided between the second casing baffle 113 and the second casing support rib 112 and is marked as a first slot 114, correspondingly, a first boss 124 matched with the first slot 114 is provided at a position corresponding to the first slot 114 at the bottom of the second casing 120, and the second casing 120 is fixed on the base 110 by the matching of the first boss 124 and the first slot 114. The second housing 120 is supported by the second housing support rib 112, so that the second housing 120 is not in direct contact with the base 110, and the water flow seeping into the base 110 is prevented from entering the second housing 120, and the height of the second housing support rib 112 is gradually reduced from the end away from the water outlet 111 to the end towards the water outlet 111, i.e. the side of the second housing 120 where the charged body 130 is installed is high and the side towards the water outlet 111 is low, even if the water flow enters the second housing 120, the water flow can be discharged from the water outlet 111 along the inclined direction of the second housing 120 under the action of the self gravity, and the influence of the water flow on the charged body 130 inside the second housing is reduced.

Referring to fig. 9 and 11, a U-shaped mounting groove 117 is further disposed on one side of the base 110 where the drain opening is disposed, and the waterproof structure 110 is mounted and fixed in the U-shaped mounting groove 117 by a mounting handle 190. In order to prevent water from entering the waterproof structure from the U-shaped mounting groove 117, a first water guard 1171 is disposed at one end of the U-shaped mounting groove 117 facing the base 110, a second water guard 1172 and a third water guard 1173 are disposed at both sides of the U-shaped mounting groove 117, and the second water guard 1172 and the third water guard 1173 are connected to the first water guard 1171, respectively. Preferably, the first water baffle 1171, the second water baffle 1172 and the third water baffle 1173 are of an integral structure with the base 110. The heights of the second water baffle 1172 and the third water baffle 1173 are gradually reduced from the end connected with the first water baffle 1171 to the end deviating from the first water baffle 1171, so that water flow can flow out of the water outlet under the action of gravity.

Referring to fig. 11, as an example, the U-shaped mounting groove 117 is provided with a water outlet 111 on each of the left and right sides thereof, and a plurality of rib baffles 115 arranged in a labyrinth shape are provided in the water outlets 111 on each of the left and right sides thereof to prevent water from entering the waterproof structure 100 through the water outlet 111. The rib position baffle 115 comprises a plurality of staggered rib position baffles which are sequentially arranged along one side of the base 110 provided with the water outlet 111 towards the inside of the base 110, and the height of each rib position baffle is gradually increased from outside to inside. In an embodiment, the rib position baffle 115 of the right drain port 111 is taken as an example, and includes a first rib position baffle 1151, a second rib position baffle 1152, a third rib position baffle 1153 and a fourth rib position baffle 1154 which are arranged inside from the side of the base 110 provided with the drain port, wherein one end of the first rib position baffle 1151 is connected with the second rib position baffle 1172, the other end of the first rib position baffle 1151 extends in a direction departing from the second rib position baffle 1172, the height of the first rib position baffle 1151 is smaller than that of the second rib position baffle 1152, the height of the second rib position baffle 1152 is smaller than that of the third rib position baffle 1153, and the height of the third rib position baffle is smaller than that of the fourth rib position baffle 1154, so as to form the rib position baffle 115 arranged in a labyrinth shape; the rib position baffle of the left water outlet and the rib position baffle of the right water outlet are symmetrically arranged. When water flow enters the waterproof structure 100 from the water outlet 111, the water flow meets the rib position baffle plate 115 arranged in a labyrinth shape, the water pressure is smaller and smaller, and when the gravity of the water is larger than or equal to the pressure of the water, the water cannot continuously enter the waterproof structure, so that the water inlet short circuit of an internal electrified body is avoided. If there is a small amount of ponding in waterproof construction 100 inside, the effect of guide rivers is still played to a plurality of muscle position baffles 115 that the labyrinth was arranged, makes rivers discharge from outlet 111 along muscle position baffle, prevents the inside ponding of waterproof construction. Preferably, a fifth rib position baffle 1155 perpendicular to the fourth rib position baffle 1154 is further disposed on the inner side of the fourth rib position baffle 1154, one end of the fifth rib position baffle 1155 faces the fourth rib position baffle 1154, the other end faces the second housing 120, the fifth rib position baffle 1155 can guide water flowing out of the second housing 120 to enter the labyrinth rib position baffle 115, and then the water flow is discharged from the water outlet 111 along the fourth rib position baffle 1154, the third rib position baffle 1153, the second rib position baffle 1152 and the first rib position baffle 1151 in sequence.

Referring to fig. 1 and 12 to 15, one side of the cover 150 is connected to the third housing 140, and the other side is connected to the base 110. The shape of the side of the cover 150 connected to the third housing 140 is the same as the shape of the third housing 140, the cover 150 is connected to the third housing 140 through a second seam allowance 180, and the second seam allowance 180 includes a groove disposed on the cover 150 and a boss disposed on the third housing 140 and matching with the groove. Preferably, the second seam allowance 180 is perpendicular to the first seam allowance 170, at this time, the second seam allowance 180 can prevent most of the water flow from entering the waterproof structure 100, even if a small amount of water flow enters, because the direction of the second seam allowance 180 is perpendicular to the direction of the first seam allowance 170, the direction of the water flow changes, the water flow entering the structure cannot impact the first seam allowance 170, and the waterproof performance of the waterproof structure is further improved. In order to make the second housing 120 more firmly mounted, the cover 150 is further provided with a second housing fixing plate 151, the second housing fixing plate 151 is provided with a second engaging groove 152, a second boss 125 engaged with the second housing 120 is disposed at a position corresponding to the second engaging groove 152, and when the cover 150 is connected to the third housing 140 through the second seam allowance 180, the second housing 120 is fixed between the base 110 and the cover 150 through the engagement of the second boss 125 and the second engaging groove 152. The shape of the side of the cover 150 connected to the base 110 is the same as the shape of the base 110, a drain opening is provided at a position of the cover 150 corresponding to the drain opening of the base 110, and a mounting groove 155 corresponding to the shape of the mounting handle 190 is provided at a position corresponding to the U-shaped mounting groove 117. The cover 150 and the base 110 are connected by positioning posts, for example, a fourth positioning post 116 is disposed on the base 110, a fifth positioning post 153 matched with the fourth positioning post 116 is disposed at a position of the cover 150 corresponding to the fourth positioning post 116, and during installation, the fifth positioning post 153 is inserted into a positioning slot of the fourth positioning post 116 and then fixed by bolts. Because the base 110 is provided with a plurality of rib position baffles 115 arranged in a labyrinth shape, and the cover 150 is also provided with a baffle 154 matched with the rib position baffles at the position corresponding to the rib position baffles, the sealing effect is better.

Referring to fig. 16, in other embodiments, a seam may not be provided between the cover 150 and the third housing 140, and the seam may be directly and tightly attached to the third housing 140, because the curved surface has a complicated shape, and sometimes the seam is difficult to form a seam structure, and the absence of the seam may reduce the difficulty of forming and reduce the cost. At this time, a gap between the cover 150 and the third case 140 is very small, after water enters the waterproof structure from the small gap between the cover 150 and the third case 140, the water pressure drops sharply due to a sudden increase of the space, the low-pressure fine water flow cannot impact the first seam 170 between the second case 120 and the third case 140, and due to the tension of the water, the water flow cannot penetrate into the charged body 130 inside the second case 120 from the gap, and can only flow along the surface of the second case 120 under the action of gravity, and because the second case 120 is inclined to one side of the drain opening 111 when being installed, the water flow flows to the drain opening 111 along the second case 120 quickly, and flows away through the drain opening 111, thereby reducing the risk of short circuit of the charged body 130.

The waterproof structure provided by the invention is simple to process, can be opened, is convenient to assemble, can be applied to the protection of any charged body meeting the structural characteristics of the waterproof structure, such as a PCB (printed Circuit Board), a switch, a terminal interface, an electric wire, a battery pack, a lamp bead and the like, can meet the severe rain test, reliably protects the charged body, and reduces the risk of short circuit of the charged body due to water.

Referring to fig. 17, the present invention further provides an electric tool including the waterproof structure, for example, a grass mower, which includes a housing 200, a push rod 300 connected to the housing 200, a walking roller 400 installed at the bottom of the housing 200, and a driving assembly, a transmission assembly and a cutting assembly (not shown) installed inside the housing 200, and the grass mower further includes a waterproof structure 100 disposed on the housing, wherein the waterproof structure is the waterproof structure 100 of the present invention. The charged body in the waterproof structure 100 in this embodiment is a charged bead for lighting of the lawn mower, and therefore, the third housing 140 is made of a transparent material. When installed, the side of the waterproof structure 100 where the drain opening 111 is provided is inclined downward and fixed to the housing 200 by the mounting handle 190. It should be noted that the remaining structure of the lawnmower is a structure commonly used in the art and will not be described in detail here.

Referring to fig. 2, 11 and 15, when the lawn mower performs a rain test, the impact water enters from the drainage port 111 of the base 110, and then encounters the first rib baffle 1151, the water is blocked from flowing back, and the pressure of the water and the water subsequently entering the drainage port 111 counteract each other, so that a large amount of water is blocked at the drainage port 111 and cannot go deep further; the rivers after the partial decompression also can continue to get into waterproof construction 100's inside along the direction of muscle position baffle, but because inside has a plurality of muscle positions that are labyrinth form and arranges to block 115, can lead to rivers pressure littleer and littleer, at last under the pressure condition of the gravity more than or equal to water of water, inside water will unable continuation progress lamp housing subassembly to the electrified body position's of waterproof construction inside intaking has been avoided. In addition, during a rain test, the impact water flow may also impact other parts of the waterproof structure 100, and the impact water flow may flow from a gap at a connection position of the waterproof structure, such as a connection gap between the base 110 and the third housing 140, and a connection gap between the cover 150 and the third housing 140, and may be squeezed into the waterproof structure, and the water flow squeezed into the gap may suddenly increase due to a space, so that the water pressure is greatly reduced, and the water flow with small and low pressure may not impact the seam structure of the second housing 120 and the third housing 140 to enter the charged body 130, and may not enter the charged body 130 from the gap due to a tensile force of water, and may only flow along the surface of the second housing 120 under the action of gravity, and then enter the plurality of rib position baffles 115 arranged in a labyrinth shape, and flow away from the water outlet 111. Since the water flow cannot enter the inside of the charged body 130, the risk of the charged body 130 being short-circuited is removed.

In summary, the second housing is added on the base, and the charged body is installed in the cavity formed by the second housing and the third housing, so that the charged body is sealed in the sealed cavity, the second housing and the third housing are connected through the seam allowance, the seam allowance is shielded by the first housing, water flow cannot directly impact the seam allowance structure, and in addition, water flow squeezed into the inner part from the gap suddenly increases due to the space, so that the water pressure is greatly reduced, the water flow with small low pressure cannot impact the seam allowance structures of the second housing and the third housing to enter the charged body, and finally flows along the surface of the second housing under the action of gravity and tension and is discharged from the water outlet, thereby reducing the risk of short circuit of the charged body. The electric tool comprises the waterproof structure, can be subjected to a more severe rain test, and increases the safety and reliability of the electric tool. Therefore, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A waterproof structure characterized by comprising:

a first housing having a first opening formed therein;

a second housing mounted to the interior of the first housing and having a second opening therein;

the third shell is arranged on the first shell or/and the second shell and is butted with the first opening and the second opening respectively;

the charged body is arranged in a cavity defined by the second shell and the third shell;

wherein the third housing interfaces with the first opening to enclose the second housing inside the first housing; the second opening and the first opening face the same direction, the second opening is recessed into the first opening, and a first spigot is arranged at the butt joint position of the third shell and the second opening; the second shell and the third shell are connected through the first spigot, and partial water flow can be prevented from entering the chamber and contacting the charged body.

2. The waterproof structure according to claim 1, wherein the first case includes a base and a cover, the cover being mounted on the base, and the second case being mounted in a cavity between the cover and the base.

3. The waterproof structure according to claim 1, wherein the electrically charged body is a lamp bead mounted on a circuit board, and a mounting bracket for the circuit board is provided in the second housing.

4. The waterproof structure according to claim 1, characterized in that said waterproof structure further comprises a second housing inner cover mounted between said second housing and said third housing.

5. The waterproof structure according to claim 4, wherein the second housing has a plurality of first positioning posts, the second housing has a second positioning post corresponding to the first positioning post, and the third housing has a third positioning post corresponding to the second positioning post.

6. The waterproof structure according to claim 2, wherein a side of the base facing away from the second housing is provided with a drain opening.

7. The waterproof structure according to claim 6, wherein a second housing support rib is provided at a position of the base corresponding to the second housing, and a height of the second housing support rib is gradually reduced from an end away from the drain opening to an end toward the drain opening.

8. The waterproof structure according to claim 7, wherein a second housing baffle is provided at an end of the second housing support rib facing the drain opening, and a mating surface conforming to the shape of the second housing is provided on the second housing baffle.

9. The waterproof structure of claim 8, wherein a first slot is disposed between the second housing baffle and the second housing support rib, and a first boss is disposed on the second housing corresponding to the first slot.

10. The waterproof structure according to claim 2, wherein a second housing fixing plate is disposed on a side of the cover connected to the third housing, a second slot is disposed on the second housing fixing plate, and a second boss is disposed on the second housing corresponding to the second slot and engaged with the second slot.

11. The waterproof structure according to claim 2, wherein the cover body and the third housing are connected by a second seam allowance.

12. The waterproof structure of claim 11 wherein said second seam allowance is perpendicular to said first seam allowance.

13. A power tool, comprising: casing, the push rod that links to each other with the casing, install the walking gyro wheel of casing bottom, install inside drive assembly, drive assembly and the work subassembly of casing, its characterized in that still includes the waterproof construction who sets up on the casing, waterproof construction includes:

a first housing having a first opening formed therein;

wherein the third housing interfaces with the first opening to enclose the second housing within the interior of the first housing; the second opening and the first opening face the same direction, the second opening is recessed into the first opening, and a first spigot is arranged at the butt joint position of the third shell and the second opening; the second shell and the third shell are connected through the first spigot, and partial water flow can be prevented from entering the chamber and contacting the charged body.

14. The power tool of claim 13, wherein the electrically charged body is an electrically charged bead.

15. The power tool of claim 13, wherein the third housing is made of a transparent material.