CN219423017U - Electric toothbrush - Google Patents

Abstract

The utility model discloses an electric toothbrush which comprises a shell, a power supply, a rotary switch and a driving mechanism, wherein the power supply, the rotary switch and the driving mechanism are arranged in the shell, the driving mechanism is electrically connected with the power supply through the rotary switch, the shell comprises a front shell and a rear shell which can rotate relatively, and the rotary switch is driven by the rear shell to be connected with or disconnected from the power supply. The electric toothbrush has the advantages of simple structure and reasonable design, the on-off of the toothbrush working circuit can be realized through simple rotation, the window is not required to be opened on the shell of the toothbrush to install the control key, the whole is concise and attractive, meanwhile, the on-off of the internal circuit is realized through the rotary switch, the internal circuit board is not arranged, the whole process is simple, the structure is simpler, and the cost is lower. In addition, the detachable installation of back casing and preceding casing is dismantled the back casing and can be realized the quick replacement of power, and the equipment of whole toothbrush is also very convenient simultaneously.

Description

Electric toothbrush

Technical Field

The utility model relates to the technical field of electric toothbrushes, in particular to an electric toothbrush.

Background

With the improvement of technology and living standard, electric toothbrushes are increasingly widely used. The electric toothbrush is characterized in that the brush head generates high-frequency vibration through the rapid rotation or vibration of the motor core, toothpaste is instantaneously decomposed into fine foam to deeply clean the gaps between teeth, and meanwhile, the vibration of the brush hair can promote the blood circulation of the oral cavity and has a massaging effect on gum tissues. The existing electric toothbrush needs to be windowed on the shell to correspondingly install a switch key or a charging interface and the like of the toothbrush, so that the shell of the toothbrush is not concise and the whole appearance is not beautiful; in addition, the control circuit of the existing electric toothbrush needs to be designed with a circuit board, so that the production process of the toothbrush is more complex, the cost is higher, and the overall structure of the toothbrush is also more complex.

In view of this, the present inventors have discovered an electric toothbrush.

Disclosure of Invention

The utility model aims to provide the electric toothbrush which has a simple structure and reasonable design and controls the on-off of the toothbrush working circuit through the simple rotary interface.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides an electric toothbrush, includes the casing, sets up power, rotary switch in the casing, the actuating mechanism who is connected with the power electricity through rotary switch, the casing includes rotatable front housing, back casing, rotates back casing and drives rotary switch and switch on or break off actuating mechanism and the electricity of power and be connected.

Further, a fixing seat connected and fixed with the front shell is arranged in the shell, and a mounting groove for sequentially mounting the driving mechanism and the power supply is formed in the fixing seat along the direction from the front shell to the rear shell.

Further, the junction of preceding casing and back casing is equipped with interior step and the outer step of adaptation, be equipped with annular protruding edge on the faying surface of interior step and outer step, with annular protruding edge set up the annular, just be equipped with the sealing washer between interior step and the outer step.

Further, the rotary switch comprises a first conduction assembly electrically connected with the driving mechanism and a second conduction assembly electrically connected with the power supply, and the rear shell rotates to drive the second conduction assembly to be conducted or disconnected with the first conduction assembly.

Further, the first conduction assembly comprises a connecting sheet, one end of the connecting sheet is electrically connected with the driving mechanism, and the other end of the connecting sheet is conducted or disconnected with the second conduction assembly.

Further, the second conduction assembly comprises a first contact structure electrically connected with the power supply and a second contact structure in contact conduction with the first contact structure and capable of synchronously rotating with the rear shell, the second contact structure is an elastic structure, and elastic deformation occurs when the second contact structure rotates to be in contact conduction or separation disconnection with the first conduction assembly.

Further, the rear shell is provided with a second movable through hole axially arranged along the rear shell, the second contact structure is arranged in the second movable through hole, the first conduction assembly is provided with a contact piece corresponding to the second movable through hole, the contact piece is provided with at least one abdication hole along the rotation track of the second movable through hole, and the second contact structure rotates to be in contact with the contact piece to be conducted or fall into the abdication hole to be separated from the contact piece.

Further, the second contact structure comprises a spring axially arranged along the second movable through hole and a conductive sphere propped against one end of the spring.

Further, the back casing is equipped with the first movable through-hole that sets up along its axial, and first movable through-hole is coaxial with the back casing, first contact structure includes electrically conductive spheroid, spring and switches on the piece, electrically conductive spheroid and spring set up in first movable through-hole, spring one end is with electrically conductive spheroid support the port of first movable through-hole and be connected with the power electricity, and the spring other end offsets with and switches on the piece and switch on the piece, just switch on piece and second contact structure contact conduction.

Further, the second conducting component is located at the rear end of the power supply, and the conducting piece is located at a port, far away from the power supply, of the first movable through hole.

After the technical scheme is adopted, compared with the prior art, the utility model has the following advantages:

the electric toothbrush has a simple structure and reasonable design, the shell drives the second conduction assembly to be in contact conduction with the first conduction assembly after rotation, so that the conduction of a toothbrush working circuit is realized, and the toothbrush is in a working state; the shell drives the second conduction assembly to be separated from the first conduction assembly through the rotation, so that the disconnection of the toothbrush working circuit is realized, the toothbrush is in a non-working state, namely, the connection or disconnection of the toothbrush working circuit can be realized through simple rotation, a control key is not required to be installed on the shell of the toothbrush through windowing, the whole process is simple and attractive, the connection or disconnection of the internal circuit is realized through the rotary switch, the circuit board is not arranged inside, the whole process is simple, the structure is simpler, and the cost is lower. In addition, the detachable installation of back casing and preceding casing is dismantled the back casing and can be realized the quick replacement of power, and the equipment of whole toothbrush is also very convenient simultaneously.

Drawings

FIG. 1 is a perspective view of an electric toothbrush in accordance with an embodiment of the present utility model;

FIG. 2 is an exploded view of an embodiment of the electric toothbrush of the present utility model;

FIG. 3 is a rear cross-sectional view of an embodiment of the utility model with the brush head removed;

FIG. 4 is a schematic view of a front housing and a rear housing according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the interior of a housing of an electric toothbrush in accordance with an embodiment of the present utility model;

FIG. 6 is an exploded view of the mounting structure of the fixing base according to the embodiment of the present utility model;

fig. 7 is an exploded view of the second conductive element and the rear housing according to an embodiment of the present utility model.

Reference numerals illustrate:

10-a housing, wherein the housing is provided with a plurality of grooves,

11-front shell, 111-outer step, 112-annular flange, 113-sealing groove, 114-sliding groove, 115-clamping groove,

12-a rear housing, 121-an inner step, 122-a ring groove, 123-a first movable through hole, 124-a second movable through hole, 125-a fixed end cover,

13-a fixed seat, 131-a clamping protrusion, 132-an elastic clamping lug, 133-a mounting spring, 134-a containing groove, 135-an annular part,

a 20-power source, which is connected with the power source,

30-a rotary switch, which is provided with a plurality of switches,

31-first conductive element, 311-connecting pad, 312-contact pad, 313-relief hole,

32-second conductive elements, 321-first contact structures, 322-second contact structures,

33-a spring, which is provided with a spring,

34-a conductive sphere of the type,

35-a conducting strip, which is connected with the circuit board,

a 40-a drive mechanism, which is provided with a first driving mechanism,

50-brush head.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that, in the present utility model, terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element of the present utility model must have a specific orientation, and thus should not be construed as limiting the present utility model.

Examples

Referring to fig. 1 to 7, the present utility model discloses an electric toothbrush, in which a casing 10 of the electric toothbrush is not provided with a window, and the whole toothbrush is compact and beautiful.

Referring to fig. 1 to 7, an electric toothbrush includes a housing 10, a power source 20 disposed in the housing 10, a rotary switch 30, and a driving mechanism 40 electrically connected to the power source 20 through the rotary switch 30, wherein the housing 10 includes a front housing 11 and a rear housing 12 which are rotatable relative to each other, and the rotation of the rear housing 12 drives the rotary switch 30 to turn on or off the driving mechanism 40 to electrically connect to the power source 20.

The power supply 20, the rotary switch 30, and the driving mechanism 40 are all disposed in the housing 10, and the driving mechanism 40 includes a dc motor. The rotating shaft of the motor extends out of the shell 10 to be connected with the brush head 50 of the toothbrush, and the brush head 50 is detachably connected with the rotating shaft of the motor, so that the brush head 50 can be replaced, and the structure of the driving mechanism 40 and the brush head 50 is of the existing design and is not expanded herein. Wherein the brush head 50 is located at one end of the housing 10, and the end where the brush head 50 is mounted is defined as the front end of the housing 10.

The power supply 20 provides power to the drive mechanism 40 (motor), and the drive mechanism 40 rotates to drive the brush head 50 to rotate. Wherein, the on or off means electrical on or off, and the power supply 20 is electrically connected with the driving mechanism 40, so that the power supply 20 can provide electric energy for the driving mechanism 40, and the driving mechanism 40 rotates to drive the brush head 50 to rotate; when the power supply 20 is electrically disconnected from the drive mechanism 40, the power supply 20 cannot supply power to the drive mechanism 40, the drive mechanism 40 is not operated, and the electric toothbrush is in an inoperable state.

Through setting up power 20, rotary switch 30, actuating mechanism 40 in casing 10 to through rotary switch 30 rotary control actuating mechanism 40 and power 20's electricity connection, so, the casing 12 can control electric toothbrush's opening or closing after the rotation, need not to open the window to the control button anymore on casing 10, whole casing 10 outward appearance is clean and tidy, elegant appearance. In addition, the whole toothbrush does not need to be provided with a circuit board, the rotary switch 30 is turned on or off by rotating the rear shell 12, the whole toothbrush is simpler in design and process, lower in cost and simpler in structure.

As shown in fig. 1 to 4, the front housing 11 and the rear housing 12 are detachably connected, and the two housings can rotate relatively, and the specific structure is as follows: the junction of preceding casing 11 and back casing 12 is equipped with interior step 121 and the outer step 111 of adaptation, be equipped with annular protruding edge 112 on the mating surface of interior step 121 and outer step 111, with annular protruding edge 112 the annular 122 that sets up that corresponds, just be equipped with the sealing washer between interior step 121 and the outer step 111.

In this embodiment, the housing 10 is cylindrical as a whole, the front housing 11 and the rear housing 12 are cylindrical, and the rear end of the front housing 11 and the front end of the rear housing 12 are connected and fixed. Specifically, the rear end of the front housing 11 is provided with the outer step 111, the front end of the rear housing 12 is provided with the inner step 121, the outer step 111 and the inner step 121 are all arranged along the circumferential direction of the housing 10, and the inner step 121 is exactly complementary with the outer step 111 and is adapted, so that when the rear end of the front housing 11 is assembled and fixed with the front end of the rear housing 12, the inner step 121 is correspondingly assembled with the outer step 111, and the inner wall and the outer wall of the assembled housing 10 are flat and have no obvious gaps.

The front shell 11 and the rear shell 12 are connected in a clamping manner through the annular convex edge 112 and the annular groove 122, meanwhile, the annular convex edge 112 can rotate in the annular groove 122, specifically, the annular convex edge 112 is arranged on the side wall of the outer step 111 of the front shell 11, the annular groove 122 is arranged on the inner wall of the inner step 121 of the rear shell 12, the front shell 11 and the rear shell 12 are connected in a connecting manner, the front shell 11 and the rear shell 12 can be disassembled at any time, and meanwhile, the relative rotation of the front shell 11 and the rear shell 12 cannot be influenced.

A sealing ring (not shown) is disposed between the inner step 121 and the outer step 111. The design of the sealing ring ensures the tightness of the shell 10 and prevents moisture from penetrating into the shell 10 to influence the use of the electric toothbrush. Specifically, the outer wall of the outer step 111 of the front housing 11 is provided with a sealing groove 113, and the sealing ring is correspondingly clamped in the sealing groove 113.

As shown in fig. 2 to 6, a fixing seat 13 connected and fixed with the front housing 11 is provided in the housing 10, and a mounting groove for sequentially mounting the driving mechanism 40 and the power supply 20 is provided in the fixing seat 13 along the direction from the front housing 11 to the rear housing 12. The fixed seat 13 is installed in the housing 10 and is fixed corresponding to the front housing 11, and the fixed seat 13 is fixed when the rear housing 12 rotates relative to the front housing 11. The fixing seat 13 is provided with mounting grooves corresponding to the driving mechanism 40 and the power supply 20, so that the driving mechanism 40 and the power supply 20 can be quickly mounted, and the assembly is convenient.

Specifically, the inner wall of the front housing 11 is provided with a plurality of sliding grooves 114 axially arranged along the front housing, a plurality of clamping grooves 115 are formed in the inner wall of the front housing 11, clamping protrusions 131 are arranged on the outer wall of the fixing base 13 corresponding to the sliding grooves 114, elastic clamping lugs 132 are arranged corresponding to the clamping grooves 115, and clamping protrusions 131 are arranged on the inner wall of the front housing 11, and clamping grooves are correspondingly formed in the outer wall of the fixing base 13. During assembly, the front end of the fixing base 13 is matched with the sliding groove 114 along the clamping protrusion 131 and slides to the bottom, and the corresponding elastic clamping lug 132 is clamped into the clamping groove 115, so that the fixing base 13 and the front shell 11 are fixedly installed, the assembly is convenient, and the fixing base 13 can be effectively prevented from moving along the axial direction or the radial direction relative to the front shell 11.

The periphery of the fixing seat 13 is corresponding to a semi-cylinder shape, and corresponds to the inner wall of the shell 10, so that the assembled structure is more compact. The semi-cylindrical side of the fixing seat 13 corresponding to the non-curved surface is provided with the mounting groove, the mounting groove is respectively matched with the motor to be mounted and the power supply 20, wherein the power supply 20 is a dry battery, the mounting groove is also a circular arc groove, and the motor and the dry battery are correspondingly clamped into the mounting groove conveniently and rapidly, so that the rapid assembly of the motor and the dry battery is realized. In this embodiment, after the rear housing 12 is detached from the front housing 11, the mounting groove for mounting the power supply 20 can be completely exposed, so that the power supply 20 can be replaced conveniently.

As shown in fig. 2 to 7, the rotary switch 30 is designed as follows: the rotary switch 30 includes a first conductive component 31 electrically connected to the driving mechanism 40, and a second conductive component 32 electrically connected to the power source 20, and the rear housing 12 rotates to drive the second conductive component 32 to be connected to or disconnected from the first conductive component 31.

Specifically, the front end (positive electrode) of the power source 20 (dry battery) is connected to one electrode (positive electrode) of the driving mechanism 40 (dc motor), and further, in the installation groove of the installation power source 20, an installation spring 133 is provided corresponding to the front end of the power source 20, and the installation spring 133 is always connected to the positive electrode of the driving mechanism 40 through a wire (not shown in the figure).

The negative electrode of the driving mechanism 40 is electrically connected with the first conductive component 31 all the time through a wire, the rear end (negative electrode) of the power supply 20 is electrically connected with the second conductive component 32 all the time, the rear housing 12 rotates to drive the second conductive component 32 to be conductive or disconnected with the first conductive component 31, when the second conductive component 32 is conductive with the first conductive component 31, the corresponding power supply 20 is electrically conductive with the driving mechanism 40, and when the second conductive component 32 is disconnected with the first conductive component 31, the corresponding power supply 20 is electrically disconnected with the driving mechanism 40.

The first conductive component 31 includes a connection piece 311, one end of the connection piece 311 is electrically connected to the driving mechanism 40, and the other end is connected to or disconnected from the second conductive component 32. Specifically, the connecting piece 311 is a conductive metal sheet, the front end of the connecting piece 311 is always connected with the negative electrode of the power supply 20, the second conducting component 32 is located at the rear end of the fixing seat 13/the power supply 20, the rear end of the connecting piece 311 extends to the position of the second conducting component 32, and when the second conducting component 32 rotates, the rear end of the connecting piece 311 is in contact with the second conducting component 32 to be conducted or separated from the second conducting component 32.

Further, the whole rectangular form of connection piece 311, its both ends stretch into inside fixing base 13, its middle part is installed along the outer wall of fixing base 13, the outer wall of fixing base 13 corresponds the holding groove 134 that is equipped with holding connection piece 311, and be equipped with fixed protruding in the holding groove 134, connection piece 311 corresponds the through-hole that is equipped with fixed protruding block, the both ends of connection piece 311 stretch into inside fixing base 13 from fixing base 13 outer wall, fixing base 13 lateral wall corresponds has the clearance that supplies connection piece 311 both ends to pass through, through the cooperation of holding groove 134, fixed protruding and through-hole, the inside quick, firm equipment of realization connection piece 311 of realization track you work of clearance card.

The second conducting assembly 32 includes a first contact structure 321 electrically connected to the power source 20, and a second contact structure 322 in contact with the first contact structure 321 and rotating synchronously with the rear housing 12, the second contact structure 322 is an elastic structure, and when the second contact structure 322 rotates, elastic deformation occurs to contact with the first conducting assembly 31 for conducting or separating from the first conducting assembly.

The second conducting component 32 comprises a first contact structure 321 and a second contact structure 322, the first contact structure 321 is always in contact conduction with the rear end (negative electrode) of the power supply 20, the second contact structure 322 is always in contact conduction with the first contact structure 321, meanwhile, the second contact structure 322 is an elastic structure and can synchronously rotate with the rear shell 12, in the process that the second contact structure 322 subsequently synchronously rotates with the shell 12, the second contact structure 322 can deform, the second contact structure 322 can be in contact conduction with the first conducting component 31 or be separated from the first conducting component 31, when the second contact structure 322 is in contact conduction with the first conducting component 31, the first conducting component 31 is electrically conducted with the second conducting component 32 (the driving mechanism 40 is electrically connected with the power supply 20), when the second contact structure 322 is separated from the first conducting component 31, the first conducting component 32 is electrically disconnected (the driving mechanism 40 is disconnected from the power supply 20), the rotating switch 30 can be contacted or disconnected, and accordingly, the conducting or disconnecting of a toothbrush working circuit is realized.

Specifically, the design of the second contact structure 322 is as follows: the rear housing 12 is provided with a second movable through hole 124 axially arranged along the rear housing, the second contact structure 322 is arranged in the second movable through hole 124, the first conduction component 31 is provided with a contact piece 312 corresponding to the second movable through hole 124, the contact piece 312 is provided with at least one yielding hole 313 along the rotation track of the second movable through hole 124, and the second contact structure 322 rotates to be in contact conduction with the contact piece 312 or falls into the yielding hole 313 to be separated from the contact piece 312.

The rear end of the rear housing 12 is provided with a through hole to form the second movable through hole 124, and the fixed seat 13 has an annular portion 135 corresponding to the inner wall of the rear end of the rear housing 12, and when the rear housing 12 rotates, the second movable through hole 124 rotates along the outer wall of the annular portion 135 and is located inside the annular portion 135. The second movable through hole 124 is not coaxial with the rear housing 12, that is, the axis of the second movable through hole 124 is not coincident with the axis of the rear housing 12, and the rear housing 12 rotates along its axis, so that the rear housing 12 rotates, and the second movable through hole 124 does not move circumferentially along the axis of the rear housing 12.

The second contact structure 322 is disposed in the second movable through hole 124, and the second contact structure 322 is an elastic structure, and the second contact structure 322 can deform (reciprocate) in the second movable through hole 124 along the axial direction of the second movable through hole 124. The first conductive component 31 is provided with a contact piece 312 corresponding to the second movable through hole 124, the contact piece 312 and the connecting piece 311 are integrally formed and are conductive metal, the contact piece 312 is correspondingly located at the inner side of the rear housing 12, and the contact piece 312 is provided with a plurality of abdicating holes 313 along a circumferential direction, the circumference formed by the abdicating holes 313 is corresponding to a movement track of the second movable through hole 124 when the rear housing 12 rotates, that is, when the rear housing 12 drives the second contact structure 322 to rotate, the second contact structure 322 may be in direct contact with the contact piece 312, or the second contact structure 322 falls into the abdicating holes 313 and is not in contact (separation) with the contact piece 312, the contact or separation between the second contact structure 322 and the contact piece 312 is realized through elastic deformation of the second contact structure 322, and when the second contact structure 322 is in contact with the contact piece 312, the second contact structure 322 can be ensured to be pressed with the contact piece 312, so that the conduction stability is ensured.

Specifically, the second contact structure 322 includes a spring 33 axially disposed along the second movable through hole 124 and a conductive ball 34 abutting against one end of the spring 33. The conductive sphere 34 is located at the front end (inner end) of the second movable through hole 124, the front end of the spring 33 abuts against the missile sphere, and the other end of the spring is always conducted with the first contact structure 321. Further, the diameter of the top sphere is larger than the diameter of the front end port of the second movable through hole 124, and the diameter of the relief hole 313 is not smaller than the diameter of the conductive sphere 34, so that the port of the conductive sphere 34, which is pressed against the second movable through hole 124 by the spring 33, will not separate from the second movable through hole 124, and at the same time, it is ensured that the conductive sphere 34 will not contact the contact piece 312 when falling into the relief hole 313. In addition, the number of the relief holes 313 includes a plurality of the relief holes 313, and when the conductive ball 34 falls into the relief holes 313, the conductive ball moves toward the relief holes 313 under the reset action of the spring 33 until the conductive ball 34 abuts against the port of the second movable through hole 124, so that a click feeling is obtained, and the user can clearly know that the circuit is disconnected at this time, that is, the electric toothbrush is turned off.

In this embodiment, the rear housing 12 is provided with a first movable through hole 123 disposed along an axial direction thereof, the first movable through hole 123 is coaxial with the rear housing 12, the first contact structure 321 includes a conductive ball 34, a spring 33 and a conducting plate 35, the conductive ball 34 and the spring 33 are disposed in the first movable through hole 123, one end of the spring 33 electrically connects the end of the conductive ball 34, which abuts against the first movable through hole 123, with the power supply 20, the other end of the spring 33 abuts against the conducting plate 35 for conducting, and the conducting plate 35 contacts with the second contact structure 322 for conducting.

The first movable through-hole 123 is similar in design to the second movable through-hole 124, except that the first movable through-hole 123 is coaxial with the rear housing 12. The first contact structure 321 is similar to the second contact structure 322, and is also designed with the conductive ball 34 and the spring 33, and the matching principle of the conductive ball 34, the spring 33, and the first movable through hole 123 and the second movable pupil and the second contact structure 322 are the same, which will not be described herein, and the difference is that the first movable through hole 123 is coaxial with the rear housing 12, and when the rear housing 12 rotates, the first movable through hole 123 rotates in situ along the axis thereof, and the contact piece 312 is also designed with a yielding hole 313 corresponding to the conductive ball 34 in the first movable through hole 123, so that the first contact structure 321 is always in contact conduction with the rear end of the power supply 20.

The conducting piece 35 is conductive metal, the conducting piece 35 is arranged at the rear end of the rear shell 12, specifically, a fixing protrusion is arranged at the end part (outer side end) of the rear end of the rear shell 12, a through hole is arranged on the conducting piece 35 corresponding to the fixing protrusion, the conducting piece 35 is assembled and fixed through the cooperation of the fixing protrusion and the through hole, the conducting piece 35 corresponds to the outer side ends of the first movable through hole 123 and the second movable through hole 124, and the springs 33 in the first movable through hole 123 and the second movable through hole 124 are all propped against the conducting piece 35 all the time to be in contact conduction. Further, a fixing end cover 125 is further provided at the rear end of the rear housing 12 to further fix and protect the conducting plate 35.

The electric toothbrush has a simple structure and reasonable design, and the second conduction assembly 32 is driven to be in contact conduction with the first conduction assembly 31 by the rotating shell 12, so that the conduction of a toothbrush working circuit is realized, and the toothbrush is in a working state; the shell 12 drives the second conduction assembly 32 to be separated from the first conduction assembly 31 through rotation, namely, the disconnection of the toothbrush working circuit is realized, the toothbrush is in a non-working state, namely, the connection or disconnection of the toothbrush working circuit can be realized through simple rotation, a window is not required to be opened on the shell 10 of the toothbrush for installing a control key, the whole is concise and elegant, meanwhile, the connection or disconnection of the internal circuit is realized through the rotary switch 30, the internal circuit board is not arranged, the whole process is simple, the structure is simpler, and the cost is lower. In addition, the rear housing 12 is detachably mounted with the front housing 11, and the power supply 20 can be quickly replaced by detaching the rear housing 12, and meanwhile, the whole toothbrush is convenient to assemble.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (9)

1. An electric toothbrush, characterized in that: the power supply comprises a shell, a power supply arranged in the shell, a rotary switch and a driving mechanism electrically connected with the power supply through the rotary switch, wherein the shell comprises a front shell and a rear shell which can rotate relatively, and the rotary switch is driven by the rear shell to be connected with or disconnected from the driving mechanism through rotation;

the rotary switch comprises a first conduction assembly electrically connected with the driving mechanism and a second conduction assembly electrically connected with the power supply, and the rear shell rotates to drive the second conduction assembly to be conducted or disconnected with the first conduction assembly.

2. An electric toothbrush according to claim 1, wherein: the shell is internally provided with a fixing seat which is fixedly connected with the front shell, and the fixing seat is provided with a mounting groove for sequentially mounting the driving mechanism and the power supply along the direction from the front shell to the rear shell.

3. An electric toothbrush according to claim 1, wherein: the connecting part of the front shell and the rear shell is provided with an inner step and an outer step which are matched, the matching surface of the inner step and the outer step is provided with an annular convex edge and an annular groove which is arranged corresponding to the annular convex edge, and a sealing ring is arranged between the inner step and the outer step.

4. An electric toothbrush according to claim 1, wherein: the first conduction assembly comprises a connecting sheet, one end of the connecting sheet is electrically connected with the driving mechanism, and the other end of the connecting sheet is conducted or disconnected with the second conduction assembly.

5. An electric toothbrush according to claim 1, wherein: the second conduction assembly comprises a first contact structure electrically connected with a power supply, and a second contact structure in contact conduction with the first contact structure and capable of synchronously rotating with the rear shell, the second contact structure is an elastic structure, and elastic deformation occurs when the second contact structure rotates to be in contact conduction or separation disconnection with the first conduction assembly.

6. An electric toothbrush as recited in claim 5, wherein: the rear shell is provided with a second movable through hole axially arranged along the rear shell, the second contact structure is arranged in the second movable through hole, the first conduction assembly is provided with a contact piece corresponding to the second movable through hole, the contact piece is provided with at least one abdication hole along the rotation track of the second movable through hole, and the second contact structure rotates to be in contact conduction with the contact piece or falls into the abdication hole to be separated from the contact piece.

7. An electric toothbrush as recited in claim 6, wherein: the second contact structure comprises a spring axially arranged along the second movable through hole and a conductive sphere propped against one end of the spring.

8. An electric toothbrush as recited in claim 5, wherein: the back casing is equipped with the first movable through-hole that sets up along its axial, and first movable through-hole is coaxial with the back casing, first contact structure includes electrically conductive spheroid, spring and switches on the piece, electrically conductive spheroid and spring set up in first movable through-hole, spring one end is with electrically conductive spheroid support the port of first movable through-hole and be connected with the power electricity, and the spring other end offsets with switches on the piece and switch on the piece, just switch on piece and second contact structure contact and switch on.

9. An electric toothbrush as claimed in claim 8, wherein: the second conducting component is positioned at the rear end of the power supply, and the conducting piece is positioned at a port of the first movable through hole far away from the power supply.