CN219895989U - Electric toothbrush main machine and handle shell thereof - Google Patents

Abstract

The utility model discloses an electric toothbrush host machine and a handle shell thereof, the handle shell comprises: an upper case including a cylindrical upper case main body and an upper case joint provided at a lower end of the upper case main body; a lower case including a cylindrical lower case main body and a lower case joint provided at an upper end of the lower case main body; the upper shell and the lower shell are connected together through the upper shell connector and the lower shell connector to form a containing cavity for containing the movement. The handle shell is arranged to be the upper shell and the lower shell, so that friction in the assembly process of the movement and the handle shell can be reduced, and the assembly smoothness and the assembly efficiency are improved.

Description

Electric toothbrush main machine and handle shell thereof

Technical Field

The utility model relates to an electric toothbrush, in particular to an electric toothbrush main machine and a handle shell thereof.

Background

Electric toothbrushes have become a necessary item for many people to live daily as a widely used personal oral care implement. Power toothbrushes typically include a main body that includes a handle housing and a cartridge that is disposed within the handle housing. The handle housing of the electric toothbrushes currently on the market is one piece, and the movement is usually fitted into the mounting cavity of the handle housing from the bottom of the handle housing. In order to ensure that the movement is stably positioned in the handle shell and is prevented from shaking in the handle shell, the movement is usually tightly matched with the inner wall of the handle shell. Because the handle shell axial has certain length, the core inserts the installation in-process frictional force to the handle shell great, influences the smoothness of assembly, leads to the assembly inconvenient, and assembly efficiency is low.

Disclosure of Invention

The utility model aims to provide an electric toothbrush main machine and a handle shell thereof, so as to reduce the assembly friction between a machine core and the handle shell and improve the assembly efficiency of the machine core.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a handle housing for an electric toothbrush, comprising:

an upper case including a cylindrical upper case main body and an upper case joint provided at a lower end of the upper case main body;

a lower case including a cylindrical lower case main body and a lower case joint provided at an upper end of the lower case main body;

the upper shell and the lower shell are connected together through the upper shell connector and the lower shell connector to form a containing cavity for containing the movement.

The handle shell is arranged to be the upper shell and the lower shell, so that friction in the assembly process of the movement and the handle shell can be reduced, and the assembly smoothness and the assembly efficiency are improved.

In one embodiment, the upper shell joint has a downwardly extending U-shaped extension or the lower shell joint has an upwardly extending U-shaped extension, and the outer surface of the lower shell joint or the outer surface of the upper shell joint is provided with a U-shaped recess cooperating with the U-shaped extension, and the U-shaped extension is inserted into the U-shaped recess.

In one embodiment, the edge of the U-shaped extension part is provided with a locking protrusion, the side wall of the U-shaped concave part is provided with a locking groove matched with the locking protrusion, and the locking protrusion is inserted into the locking groove.

In one embodiment, the locking protrusions are located on both side edges of the insertion direction of the U-shaped extension portion, and the locking grooves are provided on both side walls of the insertion direction of the U-shaped recess portion.

In one embodiment, the inner surface of the U-shaped extension part or the outer surface of the U-shaped recess part is provided with a clamping protrusion, and the outer surface of the U-shaped recess part or the inner surface of the U-shaped extension part is provided with a clamping groove matched with the clamping protrusion, and the clamping protrusion is clamped into the clamping groove.

In one embodiment, the inner wall of the upper shell joint is provided with a downward extending buckle or the inner wall of the lower shell joint is provided with an upward extending buckle, the inner wall of the lower shell joint or the upper shell joint is provided with a concave part matched with the buckle, and the buckle is clamped into the concave part.

In one embodiment, the upper shell joint and the lower shell joint are fixed by glue.

In one embodiment, a curved glue spraying groove is formed in the outer surface of the U-shaped concave portion, and glue is filled in the glue spraying groove.

In one embodiment, the glue-beating groove comprises at least two axial grooves extending along the axial direction and a circular arc-shaped transition groove connected between the two adjacent axial grooves.

In one embodiment, a seal ring is provided between the upper shell joint and the lower shell joint.

The utility model provides an electric toothbrush main machine which comprises a machine core and a handle shell, wherein the machine core is arranged in the handle shell.

The advantageous effects of the additional technical features of the present utility model will be described in the detailed description section of the present specification.

Drawings

FIG. 1 is a front view of a miniaturized electric toothbrush in one embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is an exploded view of the main body of the miniaturized electric toothbrush shown in FIG. 1;

FIG. 6A is a front view of the upper housing of the miniaturized electric toothbrush shown in FIG. 1;

FIG. 6B is a right side view of FIG. 6A;

FIG. 6C is a top view of FIG. 6A;

FIG. 7A is a front view of the lower shell in one embodiment of the utility model;

FIG. 7B is a rear view of FIG. 7A;

FIG. 7C is a top view of FIG. 7A;

FIG. 8A is an exploded view of the cartridge of the miniaturized electric toothbrush main body shown in FIG. 1;

FIG. 8B is a front view of the cartridge of FIG. 8A;

FIG. 8C is a rear view of the cartridge of FIG. 8A;

FIG. 9 is a schematic perspective view of a bracket assembly of the cartridge of FIG. 8A;

FIG. 10A is a schematic perspective view of a bracket body of the bracket assembly of FIG. 9;

FIG. 10B is a schematic perspective view of another view of the bracket body of the bracket assembly of FIG. 9;

FIG. 11 is a schematic perspective view of a cover plate of the bracket assembly of FIG. 9;

FIG. 12A is a schematic perspective view of a base of the bracket assembly of FIG. 9;

FIG. 12B is a schematic perspective view of another view of the base of the bracket assembly of FIG. 9;

fig. 13 is an enlarged partial schematic view at I shown in fig. 4.

Reference numerals illustrate:

1. an electric toothbrush;

100. a host;

110. a handle housing; 111. an upper case; 1111. an upper case main body; 1112. an upper shell joint; 1113. a U-shaped extension; 1114. locking the bulge; 1116. a clamping protrusion; 1117. a glue spraying groove; 1118. a first upper rail groove; 1119. a second upper rail groove; 112. a lower case; 1121. a lower case main body; 1122. a lower shell joint; 1123. a U-shaped concave portion; 1124. a locking groove; 1125. a buckle; 1126. a clamping groove; 1128. a first lower rail groove; 1129. a second lower rail groove; 1130. a sound outlet; 1131. a connecting pipe is inserted; 113. a head; 114. tail part; 115. a seal ring;

120. a movement;

130. a bracket assembly; 131. a holder main body; 1311. a first control circuit board mounting surface; 1312. a display screen mounting surface; 1313. positioning columns; 1314. a first limiting block; 1315. a first mounting groove; 1316. a second limiting block; 1317. perforating; 1318. a second mounting groove; 1319. a first through hole; 1320. a second through hole; 1321. a screw hole; 1323. a first upper rail; 1324. a first lower rail; 1325. a second upper rail; 1326. a second lower rail; 1327. a buckle;

132. a cover plate; 1321. a second mounting surface; 1322. a third mounting groove; 1323. a limit part; 1324. a first fixing hole;

133. a base; 1331. a speaker mounting cavity; 1332. a resonant cavity; 1333. a first sleeve; 1334. a second sleeve; 1335. a coil mounting surface; 1336. a third sleeve; 1337. connecting ribs; 1338. a step; 1339. a plug-in groove;

134. a screw;

141. a first control circuit board; 1411. a first positioning hole; 1412. a second positioning hole; 1413. a third positioning hole; 1414. a first connection port;

142. a second control circuit board; 1422. a second connection port;

143. an electrical connection;

150. a driving motor; 151. a drive shaft;

160. a battery; 161. a positive electrode conductive sheet; 162. a negative electrode conductive sheet;

170. a display screen;

181. a speaker; 182. a waterproof breathable sound-transmitting member; 183. a seal;

190. a receiving coil;

200. a brush head.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily apparent, a more particular description of the utility model briefly described above will be rendered by reference to the appended drawings. It is apparent that the specific details described below are only some of the embodiments of the present utility model and that the present utility model may be practiced in many other embodiments that depart from those described herein. Based on the embodiments of the present utility model, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

In this document, when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms front, rear, upper, lower, etc. are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the clarity and convenience of the expression technical scheme. It should be understood that the use of such orientation terms should not limit the scope of the claimed utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Fig. 1 is a front view of an electric toothbrush 1 according to one embodiment of the present utility model, fig. 2 is a sectional view taken along the line A-A in fig. 1, fig. 3 is a right side view of fig. 1, fig. 4 is a sectional view taken along the line B-B in fig. 3, and in fig. 4, some sectional lines are omitted for the sake of clarity of the internal structure.

Referring to fig. 1 to 4, an electric toothbrush 1 according to one embodiment of the present utility model includes: the host 100 and the brush head 200, the lower end of the host 100 may be placed on a charging stand (not shown) for charging.

Fig. 5 is an exploded structural schematic view of the main body 100 of the miniaturized electric toothbrush 1 shown in fig. 1. As shown in connection with fig. 1-5, host 100 includes a handle housing 110 and a movement 120, the handle housing 110 being approximately cylindrical as an example to facilitate gripping. Handle housing 110 has a head 113 proximal to brush head 200 and a tail 114 distal from brush head 200, and the interior of handle housing 110 defines a receiving cavity for receiving cartridge 120.

In one embodiment, the handle housing 110 is a segmented structure that includes an upper shell 111 and a lower shell 112. The upper case 111 includes an upper receiving chamber for receiving the upper portion of the movement 120, and the lower case 112 includes a lower receiving chamber for receiving the movement 120, the upper and lower receiving chambers constituting the receiving chamber. When the movement 120 is installed, the upper part of the movement 120 is inserted into the upper case 111, the lower part of the movement 120 is inserted into the lower case 112, and then the upper case 111 and the lower case 112 are covered. Because the movement 120 has a certain length in the axial direction, and the movement 120 needs to be closely matched and positioned with the inner wall of the accommodating cavity after being installed in the handle shell 110, the movement 120 can generate larger friction with the inner wall of the accommodating cavity when being installed in the accommodating cavity, the installation difficulty is increased, and the installation efficiency is reduced. The handle shell 110 adopts the sectional design of the upper shell 111 and the lower shell 112, so that the contact area between the handle shell and the inner wall of the accommodating cavity during the installation of the movement 120 can be reduced, the contact friction is reduced, the installation difficulty is reduced, and the installation efficiency is improved.

FIG. 6A is a front view of the upper housing of the miniaturized electric toothbrush shown in FIG. 1; FIG. 6B is a right side view of FIG. 6A; FIG. 6C is a top view of FIG. 6A; FIG. 7A is a front view of the lower shell in one embodiment of the utility model; FIG. 7B is a rear view of FIG. 7A; fig. 7C is a top view of fig. 7A.

In one embodiment, referring to fig. 6A, 6B, 7A, 7B, and 7C, the upper case 111 includes an upper case body 1111 and an upper case joint 1112 provided at a lower end of the upper case body 1111, the lower case 112 includes a lower case body 1121 and a lower case joint 1122 provided at an upper end of the lower case body 1121, and the upper case joint 1112 is externally fitted over the lower case joint 1122 with a sealing ring 115 provided therebetween. Preferably, the upper housing joint 1112 has a downwardly extending U-shaped extension 1113, and the outer surface of the lower housing body 1121 is provided with a U-shaped recess 1123 that mates with the U-shaped extension 1113. In this way, the upper case joint 1112 and the lower case joint 1122 have a large contact area, and the connection reliability is high.

In order to make the junction of the upper case 111 and the lower case 112 more fit, to prevent a gap from occurring at the joint between the upper case 111 and the lower case 112 due to aged deformation of the upper case 111 when used for a long time, the handle case 110 further includes a locking structure including a locking protrusion 1114 provided on an edge of the U-shaped extension 1113 of the upper case 111 and a locking groove 1124 provided on a sidewall of the U-shaped recess 1123 of the lower case 112, and when the upper case 111 is assembled to the lower case 112, the locking protrusion 1114 is inserted into the locking groove 1124 to prevent a gap from occurring due to insufficient fit between the upper case 111 and the lower case 112 after deformation. In one embodiment, the locking protrusions 1114 are provided in a pair, and are respectively disposed at two sides of the U-shaped extension 1113, and extend in the front-rear direction; the locking grooves 1124 are a pair and are provided on both side walls of the recess. The locking tab 1114 may also act as a mounting guide. In another of these embodiments, the locking protrusion 1114 is disposed on the bottom edge of the U-shaped extension 1113 and the locking groove 1124 is disposed on the bottom wall of the U-shaped recess 1123.

In one embodiment, a pair of buckles 1125 engaged with the inner wall of the upper shell 111 are provided on the front side of the upper end surface of the lower shell 112 to increase the connection stability between the lower shell 112 and the upper shell 111.

In one embodiment, the lower end of the inner wall of the U-shaped extension 1113 is provided with a locking protrusion 1116, and the lower end of the U-shaped recess 1123 is provided with a locking groove 1126 matching the locking protrusion 1116. When the upper case 111 is mounted to the lower case 112, the locking projection 1116 is locked in the locking groove 1126. The handle housing 110 of the present utility model forms a three-point type fixation by a pair of snaps 1125 provided at the front side and a snap boss 1116 provided at the rear side, so that the connection between the upper case 111 and the lower case 112 is more reliable.

In one embodiment, referring to fig. 7B, in order to make the connection between the upper case 111 and the lower case 112 stronger, the upper case joint 1112 and the lower case joint 1122 are fixed by glue. Preferably, a curved glue-beating groove 1117 for beating glue is arranged on the outer surface of the U-shaped concave part 1123 so as to increase the glue-beating area and improve the connection strength. In one embodiment, the glue slot 1117 includes at least two axially extending axial slots and a transition slot that is connected in sequence between the trailing and leading ends of adjacent two axial slots. The setting of the glue beating groove 1117 can realize the automation of glue beating, namely when glue beating, the lower shell 112 is placed on the rotary jig for rotation, and the glue beating needle drives glue into the curve glue beating groove 1117 along the axial direction reciprocating motion of the lower shell 112.

Fig. 8A is an exploded schematic view of the movement 120 of the main body 100 of the miniaturized electric toothbrush 1 shown in fig. 1; fig. 8B is a front view of cartridge 120 of fig. 8A; fig. 8C is a rear view of cartridge 120 of fig. 8A.

Referring to fig. 8A, 8B, and 8C, the movement 120 includes a bracket assembly 130, a first control circuit board 141, a second control circuit board 142, a driving motor 150, and a battery 160. The bracket assembly 130 is provided with a first mounting cavity, a second mounting cavity, a first mounting surface and a second mounting surface 1321 which are arranged in sequence along the head-to-tail direction of the handle shell, and are mutually staggered in the circumferential direction, the driving motor 150 is arranged in the first mounting cavity, and the driving shaft 151 of the driving motor 150 extends out of the first mounting cavity and is detachably connected with the brush head 200; the battery 160 is mounted in the second mounting cavity, the first control circuit board 141 is mounted on the first mounting surface, and the second control circuit board 142 is mounted on the second mounting surface 1321. The battery 160 is connected to the first control circuit board 141 or the second control circuit board 142, and the first control circuit board 141 or the second control circuit board 142 is connected to the driving motor 150.

By dividing the control circuit board of the electric toothbrush 1 into the first control circuit board 141 and the second control circuit board 142, and the first control circuit board 141 and the second control circuit board 142 are mounted on the first mounting face 1311, 1312 and the second mounting face 1321 of the bracket assembly 130, respectively, that is, on different faces of the bracket assembly 130 that are offset from each other in the circumferential direction, the length of the bracket assembly 130 in the axial direction can be reduced, thereby reducing the length of the movement 120, and realizing miniaturization of the electric toothbrush 1.

In one embodiment, the first mounting surfaces 1311, 1312 are disposed opposite the second mounting surface 1321 such that the first mounting surfaces 1311, 1312 and the second mounting surface 1321 are spaced apart in the circumferential direction, and interference between the first control circuit board 141 and the second control circuit board 142 can be avoided.

In one embodiment, as shown in fig. 8A and 9, the bracket assembly 130 includes a bracket body 131 and a cover 132 in one embodiment.

FIG. 10A is a schematic perspective view of a bracket body of the bracket assembly of FIG. 9; FIG. 10B is a schematic perspective view of another view of the bracket body of the bracket assembly of FIG. 9; fig. 11 is a schematic perspective view of a cover plate of the bracket assembly of fig. 9.

As shown in fig. 10A, 10B and 11, one side of the bracket main body 131 is provided with the first mounting surfaces 1311, 1312, the other side is provided with the first mounting groove 1315 and the second mounting groove 1318 which are sequentially arranged from the head 113 to the tail 114 of the handle housing 110, one side of the cover plate 132 is provided with the second mounting surface 1321, the other side is provided with the third mounting groove 1322 which is matched with the first mounting groove 1315, the cover plate 132 is buckled with the bracket main body 131, the first mounting groove 1315 and the third mounting groove 1322 are butted to form the first mounting cavity, and the second mounting groove 1318 forms the second mounting cavity.

In one embodiment, the movement 120 further includes a display 170, the first mounting surfaces 1311, 1312 include a display mounting surface 1312 and a first control circuit board mounting surface 1311 disposed in sequence from the head 113 to the tail 114, the first control circuit board 141 being mounted on the first control circuit board mounting surface 1311, the display 170 being mounted on the display mounting surface 1312 and being electrically connected to the first control circuit board 141 or the second control circuit board 142. By arranging the display screen 170, information such as electric quantity and the like can be visually displayed, and the use by a user is convenient; further, the display screen 170 and the first control circuit board 141 are mounted on the display screen mounting surface 1312 and the first control circuit board mounting surface 1311, respectively, so that the structure is compact, and the size is reduced.

In one embodiment, the first control circuit board mounting surface 1311 is provided with a first through hole 1319 and a second through hole 1320 (see fig. 10A) that are in communication with the second mounting groove 1318, and the first control circuit board 141 has a second positioning hole 1412 and a third positioning hole 1413 (see fig. 8B) that correspond to the first through hole 1319 and the second through hole 1320, respectively, and the positive electrode conductive tab 161 and the negative electrode conductive tab 162 of the battery 160 are inserted into the second positioning hole 1412 and the third positioning hole 1413 after passing through the first through hole 1319 and the second through hole 1320, respectively, and are electrically connected to the first control circuit board 141. In this structure, the positive electrode conductive sheet 161 and the negative electrode conductive sheet 162 have an electrical connection function on one hand, and have a function of connecting the first control circuit board 141 on the other hand, thereby realizing screw-free fixation, improving assembly efficiency, and saving production cost.

In one embodiment, the first control circuit board 141 is further provided with at least one first positioning hole 1411 (see fig. 8B), the first control circuit board mounting surface 1311 is provided with at least one positioning post 1313 (see fig. 10A) that mates with the at least one first positioning hole 1411, and the at least one positioning post 1313 is inserted into the at least one first positioning hole 1411, respectively. The positioning column 1313 and the first positioning hole 1411 cooperate to limit the first control circuit board 141.

In one embodiment, the first control circuit board mounting surface 1311 further includes at least one pair of first stoppers 1314 (see fig. 10A) disposed at intervals in a direction perpendicular to the axial direction of the bracket assembly 130, and the first control circuit board 141 is stopped by the first stoppers 1314 (see fig. 8B).

In this embodiment, the positioning column 1313 is disposed at the lower part of the first control circuit board 141, the first limiting block 1314 is disposed at the upper part of the first control circuit board 141, when the first control circuit board 141 is assembled, the first positioning hole 1411 at the lower end of the first control circuit board 141 is opposite to the positioning column 1313, so that the positioning column 1313 is inserted into the first positioning hole 1411, then the upper end of the first control circuit board 141 is clamped between the two first limiting blocks 1314, and then the first control circuit board 141 is welded with the positive electrode conductive sheet 161 and the negative electrode conductive sheet 162 of the battery 160, thereby realizing the installation and fixation of the first control circuit board 141.

In one embodiment, as shown in fig. 10B, the second mounting slot 1318 has an opening for accessing the battery 160 that is on the same side of the bracket assembly 130 as the second mounting face 1321, and the second mounting face 1321 is on the head portion 113 side of the opening. The second mounting groove 1318 is provided with an opening, which is advantageous in facilitating assembly of the battery 160 while saving material costs.

In one embodiment, at least one pair of second limiting blocks 1316 (see fig. 10A) are disposed on the display screen mounting surface 1312 and are spaced along a direction perpendicular to the axial direction of the bracket assembly, and the display screen 170 is limited by the second limiting blocks 1316 (see fig. 8B).

In one embodiment, as shown in fig. 8C and 9, a limiting portion 1323 is disposed at one end of the second mounting surface 1321, a first fixing hole 1324 is disposed at the other end of the second mounting surface, a limiting groove (not shown) that mates with the limiting portion 1323 is disposed at one end of the second control circuit board 142, a second fixing hole (not shown) opposite to the first fixing hole 1324 is disposed at the other end of the second mounting surface, a screw hole 1321 opposite to the first fixing hole 1324 is disposed on the bracket main body 131, and a screw 1334 passes through the second fixing hole and the first fixing hole 1324 and then is screwed into the screw hole 1321, so as to fix the second control circuit board 142, the cover plate 132 and the bracket main body 131 together. Thus, the second control circuit board 142, the cover 132 and the bracket body 131 can be fixed together by one screw 1334, and the assembly efficiency is high.

Referring to fig. 8B and 8C simultaneously, the first control circuit board 141 and the second control circuit board 142 are connected by an electrical connection 143. Specifically, the first control circuit board 141 is provided with a first connection port 1414, the second control circuit board 142 is provided with a second connection port 1422, one end of the electrical connector 143 is inserted into the first connection port 1414, and the other end is inserted into the second connection port 1422, so that the first control circuit board 141 and the second control circuit board 142 are conveniently and rapidly connected. The electrical connector 143 in this embodiment employs a flexible circuit board.

In one embodiment, the first control circuit board 141 is located at the lower portion of the bracket body 131, the second control circuit board 142 is located at the upper portion of the bracket body 131, the projections of the first control circuit board 141 and the second control circuit board 142 in the front-rear direction have overlapping areas, the first connection port 1414 is disposed at a position above the first control circuit board 141 and is located at the overlapping areas, and the second connection port 1422 is disposed at a position below the second control circuit board 142 and is located at the overlapping areas, so that the electrical connector 143 is convenient for connecting the first control circuit board 141 and the second control circuit board 142.

In one embodiment, the driving motor 150 and the battery 160 are electrically connected with the first control circuit board 141. Specifically, the lower end of the first mounting groove 1315 is provided with two through holes 1317 through which both ends of a solenoid (not shown) of the driving motor 150 pass, and the solenoid of the driving motor 150 is electrically connected to the first control circuit board 141 through the two through holes 1317.

In one embodiment, referring to fig. 6C, 7C and 8B simultaneously, the inner wall of the upper receiving chamber of the upper case 111 is provided with an upper rail groove group in the axial direction, which includes a first upper rail groove 1118 and a second upper rail groove 1119 (fig. 6C). The lower accommodation chamber inner wall of the lower case 112 is provided with a lower rail groove group including a first lower rail groove 1128 and a second lower rail groove 1129 in the axial direction (fig. 7C). The bracket body 131 is provided at both sides with a first guide rail set including a first upper guide rail 1323 engaged with the first upper guide rail groove 1118 and a first lower guide rail 1324 engaged with the first lower guide rail groove 1128, and a second guide rail set including a second upper guide rail 1325 engaged with the second upper guide rail groove 1119 and a second lower guide rail 1326 engaged with the second lower guide rail groove 1129 (fig. 8B). The assembly and positioning of the movement 120 with the upper and lower cases 111 and 112 are realized through the above structure, and the structure is simple and the assembly is convenient.

In one embodiment, referring to fig. 8B, a first elastic arm buckle is disposed at the lower end of the first upper rail 1323, and a second elastic arm buckle is disposed at the lower end of the second upper rail 1325, and when the upper case 111 is assembled to the movement 120, the first elastic arm buckle and the second elastic arm buckle are buckled into corresponding slots 1126 on the inner wall of the upper case 111, so that the upper case 111 is assembled with the movement 120 more firmly.

In one embodiment, a sound outlet 1130 is provided on the handle housing 110 and a speaker mounting cavity 1331 is provided in the bracket assembly 130; cartridge 120 further includes a speaker 181 and a waterproof, air-permeable, sound-transmitting member 182, the speaker 181 being mounted in the speaker-mounting chamber 1331, the speaker 181 being oriented toward the sound outlet 1130; the waterproof and breathable sound-transmitting member 182 is disposed between the sound outlet 1130 and the speaker 181. By arranging the loudspeaker 181, the waterproof breathable sound-transmitting member 182 and other parts, the sound function of the electric toothbrush 1 is realized, including tooth brushing time reminding, tooth brushing mode switching and the like, so that the electric toothbrush 1 is better used by a user, and the oral care effect is improved; moreover, the waterproof breathable sound-transmitting member 182 has the functions of dust prevention, water prevention, ventilation, air pressure balance, pressure relief, air exhaust and the like, and is beneficial to simplifying the structure of the host 100.

As an example, the speaker 181 is electrically connected to the second control circuit board 142. Alternatively, the speaker 181 is electrically connected to the first control circuit board 141.

As shown in fig. 4 and 13, the sound outlet 1130 is located at the rear 114 of the handle housing 110; the stand assembly 130 includes a stand main body 131 and a base 133, the base 133 is detachably connected to an end of the stand main body 131 near the tail 114 of the handle housing 110, and the base 133 is provided with the speaker mounting cavity 1331. Thus, the sound outlet 1130 is remote from the brush head 200, on the one hand preventing stains from brushing teeth from entering the sound outlet 1130, and on the other hand, the sound outlet 1130 is relatively close to the ear and sounds more clearly.

In one embodiment, as shown in fig. 12A, 12B and 13, the base 133 is provided with a resonant cavity 1332, the resonant cavity 1332 is located on a side of the speaker mounting cavity 1331 near the sound outlet 1130 and is in communication with the speaker mounting cavity 1331, and the waterproof and air-permeable sound-permeable member 182 is disposed between the resonant cavity 1332 and the speaker mounting cavity 1331. The resonance chamber 1332 serves to enhance the sound signal emitted from the speaker 181, improving the sound transmission effect.

In one embodiment, the inner diameter of the speaker-mounting chamber 1331 is larger than the inner diameter of the resonance chamber 1332, a stepped surface 1339 is formed between the inner wall of the speaker-mounting chamber 1331 and the inner wall of the resonance chamber 1332, and the waterproof air-permeable sound-transmitting member 182 is fixed to the stepped surface 1339. This structure can ensure the fixability of the waterproof air-permeable sound-transmitting member 182, and ensure that it can still exert the waterproof, air-permeable and sound-transmitting effects during long-time use. In one embodiment, the waterproof, breathable acoustically transparent member 182 includes an annular elastic support and a waterproof, breathable, acoustically transparent membrane disposed within an inner bore of the elastic support. The waterproof breathable sound-transmitting piece adopts the ePTFE membrane, is a waterproof breathable sound-transmitting composite membrane, can ensure sound transmission capacity, rapidly decompresses, is highly breathable, facilitates heat dissipation, and is excellent in waterproof and high-efficiency protection. As shown in fig. 13, the elastic support serves to apply an upward elastic force to the speaker 181, effectively preventing the speaker 181 from shaking inside the base 133.

In one embodiment, the resonant cavity 1332 is a stepped hole, which includes a large diameter hole and a small diameter hole sequentially connected along the sound emitting direction, and the sound volume is increased and the sound clarity is improved by using the large and small holes as the sound cavity.

In one embodiment, a first sleeve 1333 and a second sleeve 1334 are disposed at one end of the base 133 near the tail 114 of the handle housing 110, the inner cavity of the first sleeve 1333 forms the resonant cavity 1332, the second sleeve 1334 is located outside the first sleeve 1333 and forms a plugging slot 1339 therebetween, a plugging tube 1131 protruding outwards along the axial direction is disposed on the inner bottom surface of the tail 114 of the handle housing 110, the plugging tube 1131 is inserted into the plugging slot, and a sealing member 183 is disposed between the plugging tube 1131 and the first sleeve 1333 or the second sleeve 1334. This structural design effectively improves the waterproof performance of the main body 100 of the electric toothbrush 1, ensuring its stable operation in a humid environment.

In one embodiment, a coil mounting surface 1335 is disposed at an end of the base 133 near the tail 114 of the handle housing 110, the coil mounting surface 1335 surrounds the outer side of the second sleeve 1334, and the receiving coil 190 is sleeved on the second sleeve 1334 and is fixed on the coil mounting surface 1335. Through setting up receiving coil 190, realized the wireless function of charging of electric toothbrush 1 host computer 100 for it is more convenient to charge, has reduced the use of charging wire, has reduced battery 160 loss, has improved electric toothbrush 1's environmental protection performance. As an example, a third sleeve 1336 is disposed at an end of the base 133 near the tail 114 of the handle housing 110, the third sleeve 1336 is located outside the second sleeve 1334, and a plurality of connecting ribs 1337 are disposed therebetween, and an end surface of the third sleeve 1336 and an end surface of the plurality of connecting ribs 1337 form the coil mounting surface 1335.

In one embodiment, as shown in fig. 12A, 12B and 13, a plurality of hooks 1327 protruding outwards are provided at one end of the bracket main body 131 near the tail 114 of the handle housing 110, a plurality of steps 1338 matching with the plurality of hooks 1327 are provided on a plurality of outer peripheral surfaces of the base 133, and the plurality of hooks 1327 are buckled at the plurality of steps 1338. The buckle structure realizes simple installation and disassembly between components, is convenient for the maintenance and the service of the electric toothbrush 1, and reduces the maintenance cost.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (11)

1. A handle housing for an electric toothbrush, said handle housing comprising:

an upper case including a cylindrical upper case main body and an upper case joint provided at a lower end of the upper case main body;

a lower case including a cylindrical lower case main body and a lower case joint provided at an upper end of the lower case main body;

the upper shell and the lower shell are connected together through the upper shell connector and the lower shell connector to form a containing cavity for containing the movement.

2. The handle housing of an electric toothbrush according to claim 1 wherein the upper housing joint has a downwardly extending U-shaped extension or the lower housing joint has an upwardly extending U-shaped extension, the outer surface of the lower housing joint or the outer surface of the upper housing joint being provided with a U-shaped recess cooperating with the U-shaped extension, the U-shaped extension being inserted into the U-shaped recess.

3. The handle housing of an electric toothbrush according to claim 2, wherein the edge of the U-shaped extension is provided with a locking protrusion, and the side wall of the U-shaped recess is provided with a locking groove matched with the locking protrusion, and the locking protrusion is inserted into the locking groove.

4. A handle housing of an electric toothbrush according to claim 3, wherein the locking projections are located on both side edges in the insertion direction of the U-shaped extension portion, and the locking grooves are provided on both side walls in the insertion direction of the U-shaped recess portion.

5. The handle housing of an electric toothbrush according to claim 2 wherein the inner surface of the U-shaped extension or the outer surface of the U-shaped recess is provided with a snap-in protrusion, and the outer surface of the U-shaped recess or the inner surface of the U-shaped extension is provided with a snap-in groove cooperating with the snap-in protrusion, the snap-in protrusion being snapped into the snap-in groove.

6. The handle housing of an electric toothbrush according to claim 2 wherein the inner wall of the upper housing fitting is provided with a downwardly extending catch or the inner wall of the lower housing fitting is provided with an upwardly extending catch, the inner wall of the lower housing fitting or the upper housing fitting is provided with a recess in engagement with the catch, the catch being snapped into the recess.

7. The handle housing of an electric toothbrush of claim 2, wherein the upper housing joint and the lower housing joint are secured by glue.

8. The handle housing of an electric toothbrush of claim 7, wherein the outer surface of the U-shaped recess is provided with a curved glue groove, and the glue groove is filled with glue.

9. The handle housing of an electric toothbrush of claim 8, wherein the glue-applying groove comprises at least two axially extending axial grooves and a circular arc-shaped transition groove connected between adjacent two axial grooves.

10. The handle housing of an electric toothbrush of claim 2, wherein a seal is provided between the upper housing joint and the lower housing joint.

11. A power toothbrush main unit comprising a movement, further comprising a handle housing according to any one of claims 1 to 10, the movement being housed within the handle housing.