CN219579718U - portable beauty instrument - Google Patents

Abstract

The utility model relates to the field of beauty treatment instruments, and discloses a portable beauty treatment instrument. The portable cosmetic instrument provided by the utility model comprises a shell, a first electrode and a processing circuit. The housing includes an end portion for contacting skin to be treated and a side portion for holding, the first electrode is disposed in a connection area of the end portion and the side portion of the housing, and the treatment circuit is disposed in the housing and connected to the first electrode. By the aid of the mode, the beauty instrument can discharge a certain piece of local skin, the number of electrodes of the beauty instrument is increased, and the range of the skin which can be irradiated by current of the beauty instrument is enlarged.

Description

Portable beauty instrument

Technical Field

The utility model relates to the technical field of beauty treatment instruments, in particular to a portable beauty treatment instrument.

Background

With technological progress and age development, people pay more and more attention to skin care, and experience in skin care is paid more and more attention to the effect of skin care. One of them is a portable cosmetic instrument using radio frequency or micro current.

The inventor discovers through long-term research that the electrodes of the existing portable beautifying instrument discharge a large area of flat skin and cannot discharge partial edge skin with a smaller area.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a portable beauty instrument which can discharge specific to a certain partial skin, expand the skin range of the beauty instrument which can radiate current and strengthen the beauty effect of the beauty instrument.

In order to solve the above problems, the present utility model provides a portable cosmetic apparatus, which includes a housing, a first electrode, and a processing circuit. The housing comprises an end portion for contacting the skin to be treated and a side portion for holding; a first electrode disposed at a connection region between the end and the side of the case; the processing circuit is positioned in the shell and connected with the first electrode.

Optionally, the end portion and the side portion have an included angle smaller than 120 degrees, the connection region is a bending region between the end portion and the side portion, the number of the first electrodes is two, each of the first electrodes extends along a bending line of the bending region, a part of each of the first electrodes is located at the end portion, and the rest of each of the first electrodes is located at the side portion.

Optionally, the portable beauty instrument provided by the utility model comprises a fixing piece, wherein the shell is provided with a through hole in the connecting area, one side of the first electrode facing the inside of the shell is provided with a fixing part, and the fixing piece is used for fixing the fixing part of the first electrode in the shell through the through hole so as to fix the first electrode in the shell.

Optionally, the portable beauty instrument comprises a sealing ring sleeved on the fixing part or the fixing piece to seal a gap between the fixing part and the inner wall of the through hole or seal a gap between the fixing piece and the inner wall of the through hole.

Optionally, the shell is provided with a mounting groove in the connecting area, the shape of the mounting groove is matched with the shape of the first electrode, the groove depth of the mounting groove is matched with the height of the first electrode, the first electrode is embedded in the mounting groove, the through hole is arranged at the bottom of the mounting groove, and the sealing ring is positioned between the first electrode and the bottom of the groove.

Optionally, the portable beauty instrument provided by the utility model comprises a middle frame, a first mounting plate and a second mounting plate, wherein the first mounting plate extends along a first direction, the second mounting plate extends along a second direction, the first mounting plate is provided with a first side edge and a second side edge which are oppositely arranged, and a third side edge which is connected between the first side edge and the second side edge, the second mounting plate is provided with a first side surface and a second side surface which are oppositely arranged, and the second mounting plate is connected with the third side edge of the first mounting plate through the first side surface; the shell comprises a front shell, a first side shell and a second side shell, wherein the first side shell and the second side shell are respectively arranged on two opposite sides of the first mounting plate and form a first accommodating space and a second accommodating space separated by the first mounting plate together with the second mounting plate; the front shell is arranged opposite to the second side face of the second mounting plate and forms a third accommodating space with the second mounting plate, the front shell comprises an end part and a side part, and the processing circuit is arranged in the third accommodating space.

Optionally, the connecting region of the front shell extends obliquely out of the fixing column to the third accommodating space in a direction inclined to the end part, the through hole axially penetrates through the fixing column, and the fixing piece is inserted into the through hole obliquely.

Optionally, the processing circuit includes a circuit board, and the circuit board forms a dodging groove corresponding to the position of the fixing column.

Optionally, the portable beauty instrument provided by the utility model comprises a spring needle assembly; the shell is provided with a through hole in the connecting area, the aperture of one end of the through hole adjacent to the inside of the shell is larger than the aperture of one end of the through hole adjacent to the outside of the shell, the first electrode is provided with a shape matched with the shape of the through hole, the through hole is inserted into the shell to be limited, and the elastic needle assembly is arranged between the first electrode and the processing circuit to electrically connect the first electrode and the processing circuit.

Optionally, the contact beauty treatment instrument provided by the utility model comprises a magnet; the shell is provided with a groove in the connecting area, the first electrode is embedded in the groove, and the magnet is positioned in the first electrode or the shell so as to adsorb the first electrode in the groove.

Optionally, the contact beauty instrument provided by the utility model comprises a second electrode, which is arranged at the end part of the shell and is connected with the processing circuit.

Optionally, the first electrode comprises a ring electrode surrounding the end of the housing.

The utility model has the beneficial effects that: the first electrode of the portable beauty instrument provided by the utility model is arranged in the connecting area of the end part and the side part of the shell, so that the beauty instrument can discharge partial skin, in addition, the arrangement of the first electrode increases the number of the electrodes of the beauty instrument, enlarges the skin range which can be radiated by the current of the beauty instrument, and enhances the beauty effect of the beauty instrument.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a front housing of an embodiment of a portable cosmetic device of the present utility model;

FIG. 2 is a side cross-sectional view of a housing of one embodiment of a portable cosmetic device of the present utility model;

FIG. 3 is a schematic view of a first electrode assembly of an embodiment of the portable cosmetic device of the present utility model;

fig. 4 is a schematic diagram of a middle frame structure of an embodiment of the portable cosmetic apparatus according to the present utility model;

fig. 5 is a schematic view of the structure of a circuit board surface of an embodiment of the portable beauty treatment instrument of the present utility model facing the front case.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It is to 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 further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "first," "second," and the like in this disclosure are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "include," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The inventor of the present utility model has found through long-term research that when a user uses a beauty instrument to make up the skin, the electrode of the beauty instrument needs to be completely attached to the skin contact surface, and the electrode can discharge to stimulate the skin. In order to enhance the cosmetic effect of electric current on the skin, the beauty instrument is generally provided with electrodes at the ends, and when the beauty instrument is required to be used for beautifying a part of small-area skin, it is difficult to control the discharge of the electrodes, so that the user only wants to beautify local skin and then can reach surrounding skin. In addition, for some edge portions of the biological site, such as the nose wings, the electrode of the cosmetic instrument may be difficult to fit to the edge portion, thereby causing some biological sites to not be stimulated by the current of the cosmetic instrument. Accordingly, the present utility model proposes the following embodiments capable of realizing an expansion of the area of the biological site of current radiation of the cosmetic instrument.

The following portable cosmetic instrument embodiments of the present utility model describe exemplary configurations of the cosmetic instrument.

Referring to fig. 1 and 2, fig. 1 is a schematic view of a front housing of an embodiment of the portable beauty apparatus of the present utility model, and fig. 2 is a side sectional view of a housing 10 of an embodiment of the portable beauty apparatus of the present utility model. In fig. 1, the portable beauty instrument includes: a housing 10, an electrode 500 and a treatment circuit 311, the housing 10 comprising an end portion for contacting the skin to be treated and a side portion for holding; electrodes 500 are provided at the end and side regions of the case 10 to discharge current to stimulate the skin, thereby improving the skin; the processing circuit 311 is located in the housing 10 and is connected to the electrode 500 to drive the electrode 500 to discharge.

The electrode 500 includes a first electrode 510 and a second electrode 520, the first electrode 510 being disposed at a connection region of an end and a side of the case 10, and the second electrode 520 being disposed at an end of the case 10. The first electrode 510 and the second electrode 520 emit electric current to act on the skin, expanding the range of biological sites that can be irradiated by the cosmetic instrument current. For example, the user holds the side of the cosmetic instrument, brings the end of the cosmetic instrument into contact with the skin, and the second electrode 520 and the portion of the first electrode 510 are discharged; if the user wants to stimulate the alar and surrounding biological parts, the cosmetic instrument may be tilted so that the first electrode 510 fits the alar. For another example, the user may tilt the cosmetic device to apply the first electrode 510 to the skin to stimulate the local skin only by treating a small area of the local skin with the cosmetic device.

Optionally, the end portion and the side portion have an included angle smaller than 120 degrees, the connection region is a bending region between the end portion and the side portion, the number of the first electrodes 510 is two, each of which extends along a bending line of the bending region, a part of each of the first electrodes 510 is located at the end portion, a part is located at the bending line, and the rest is located at the side portion. Of course, if the bending line is omitted, it is also possible to consider that a part of each first electrode 510 is located at the end and the remaining part is located at the side. For example, the angle between the end and the side of the cosmetic device may be 110 degrees, 70 degrees. In this embodiment, the angle between the end and the side is less than 120 degrees, so that when some skin with a bending angle is beautified by using the beauty treatment instrument, for example, the nose wing, the skin at the position can be better fitted to tighten the skin at the position.

Of course, in other embodiments, the first electrode 510 may be a point-like electrode, not necessarily extending along the bend line of the bend region.

In the use process of the beauty instrument, the electrode 500 can generate micro-current to act on the skin to stimulate the skin so as to achieve the effects of lifting and tightening the skin and effectively resisting aging. The first electrode 510 has two arc electrode strips at the end and side of the casing 10, and the first electrode 510 is an arc electrode strip, so that the electrode strip can be more attached to the facial line, especially at the concave part of the facial french, and the effect of lifting and tightening the skin is better.

Thus, in this embodiment, micro-current is generated by controlling the electrode 500 to stimulate the skin, improve the skin, such as to achieve at least any one of rapid lifting of the skin, strong anti-aging, popping and tightening of the skin, 3 minutes V face, fading of the stature, tightening of the eyes, strengthening of the skin barrier, tendering and brightening.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an assembly of a first electrode of a portable beauty treatment device according to an embodiment of the utility model. In this figure, the portable beauty instrument includes: a fixing member 512. The housing 10 is provided with a through hole in a connection region, a fixing portion 511 is provided on a side of the first electrode 510 facing the housing 10, and the fixing member 512 fixes the fixing portion 511 of the first electrode 510 in the housing 10 through the through hole to fix the first electrode 510 to the housing 10.

The first electrode 510 is fixed in the following manner: finding the corresponding installation position of the first electrode 510 on the shell 10, the first electrode 510 is provided with a fixing part 511, the fixing part 511 penetrates through a through hole reserved in the shell 10, then the penetrating fixing part 511 is found out from the shell 10, and the fixing piece 512 is installed on the fixing part 511, so that the first electrode 510 can be fixed on the shell 10.

By providing the fixing member 512, the fixing member 512 fixes the fixing portion 511 of the first electrode 510 in the housing 10 through the through hole, thereby fixing the first electrode 510 to the housing 10, so that the first electrode 510 can be stably fixed in a set area without being offset and loosened due to the external force.

Optionally, the sealing ring 1900 is sleeved on the fixing portion 511 or the fixing member 512 to seal a gap between the fixing portion 511 and the inner wall of the through hole or seal a gap between the fixing member 512 and the inner wall of the through hole.

Since the contact of the fixing portion 511 or the fixing member 512 with the through hole may be a rigid contact, the deformation amount thereof may be insufficient to block the gap between the fixing portion 511 or the fixing member 512 and the through hole due to a machining error or the like. The sealing ring 1900 is sleeved on the fixing part 511 or the fixing part 512, so that the sealing performance of the beauty instrument for preventing liquid from penetrating can be enhanced. For example, the seal 1900 may prevent skin lotion or cosmetic gel or the like from entering the housing 10 from a gap between the fixing portion 511 and the inner wall of the through hole or a gap between the seal fixing member 512 and the inner wall of the through hole.

Optionally, the casing 10 is provided with a mounting groove in the connection area, the shape of the mounting groove is matched with that of the first electrode 510, the groove depth of the mounting groove is matched with that of the first electrode 510, the first electrode 510 is embedded in the mounting groove, the through hole is arranged at the bottom of the mounting groove, and the sealing ring 1900 is located between the first electrode 510 and the bottom of the groove.

Since the contact of the first electrode 510 with the groove bottom may be a rigid contact, the deformation amount thereof may be insufficient to block the gap between the first electrode 510 and the groove bottom due to a machining error or the like. And the first electrode 510 is in direct contact with the skin, the cosmetic instrument may be used together with some liquid (e.g., skin lotion or skin gel) that may enter the interior of the cosmetic instrument through the gap between the first electrode 510 and the bottom of the tank, thereby affecting the efficacy of the cosmetic instrument. Thus, the sealing ring 1900 is disposed between the first electrode 510 and the groove bottom, so that the sealing performance of the skin-contacting region of the cosmetic device against penetration of liquid can be enhanced. For example, the seal 1900 may prevent skin lotion or cosmetic gel or the like from entering the housing 10 from a gap between the fixing portion 511 and the inner wall of the through hole or a gap between the seal fixing member 512 and the inner wall of the through hole.

In addition, the sealing ring 1900 can prevent liquid from penetrating, and the first electrode 510 can be better assembled with the housing 10, so that the first electrode 510 cannot move during use, and the use is convenient for users, and the use comfort is improved.

Referring to fig. 1 and 4, fig. 4 is a schematic view of a middle frame 100 of an embodiment of the portable cosmetic device according to the present utility model, and fig. 1 is a schematic view of a front shell of an embodiment of the portable cosmetic device according to the present utility model shown in fig. 4. In fig. 1 and 4, the present portable beauty treatment instrument embodiment includes a center frame 100, the center frame 100 having a first mounting plate 110 extending in a first direction and a second mounting plate 120 extending in a second direction, the first mounting plate 110 having a first side 111 and a second side 112 disposed opposite each other, and a third side 113 connecting between the first side 111 and the second side 112, the second mounting plate 120 having a first side and a second side disposed opposite each other, the second mounting plate 120 being connected to the third side 113 of the first mounting plate 110 by the first side.

The utility model forms the basic frame of the beauty instrument through the middle frame 100, and has simple and reasonable structure. When a user uses the beauty instrument to make skin beauty, the hand movement amplitude can be smaller, the beauty instrument is suitable for human engineering mechanics, the use is convenient and labor-saving, and the use comfort is improved.

In this embodiment, the middle frame 100 forms a structure for installing the electrode 500 and the side case, and a receiving space for receiving the parts, and the structure is simple and reasonable.

Referring to fig. 1, 2 and 4 together, the housing 10 includes a front case 400, a first side case 200 and a second side case 300. The first and second side cases 200 and 300 are respectively installed at opposite sides of the first mounting plate 110, and constitute first and second receiving spaces 210 and 310 separated by the first mounting plate 110 together with the second mounting plate 120. The processing circuit 311 is disposed in the second accommodating space 310.

The front case 400 is disposed opposite to the second side of the second mounting plate 120 and forms a third receiving space 410 with the second mounting plate 120, and the front case 400 includes an end portion and a side portion.

According to the utility model, the shell 10 is divided into the front shell 400, the first side shell 200 and the second side shell 300, the third accommodating space 410, the first accommodating space 210 and the second accommodating space 310 are respectively formed with the middle frame 100, and corresponding parts are arranged in each accommodating space, so that a plurality of parts in the beauty instrument are partitioned, the structure is reasonable and compact, and the installation is convenient.

Therefore, the portable beauty instrument has three receiving spaces, the first mounting plate 110, the first side case 200 and the second mounting plate 120 constitute the first receiving space 210, the first mounting plate 110, the second side case 300 and the second mounting plate 120 constitute the second receiving space 310, the front case 400 and the second mounting plate 120 constitute the third receiving space 410, and the first electrode 510 is at an end and side connection region of the front case 400, while the processing circuit 311, the energy storage circuit, the charging circuit, etc. are placed in the first receiving space 210, the second receiving space 310 or the third receiving space 410.

Referring to fig. 5, fig. 5 is a schematic view of a circuit board surface of a portable beauty treatment apparatus according to an embodiment of the utility model. In the present embodiment, the connecting area of the front case 400 extends obliquely out of the fixing post 513 toward the third accommodating space 410 in a direction inclined to the end, the through hole axially penetrates the fixing post 513, and the fixing member 512 is inserted obliquely into the through hole. The fixing element may be a screw, for example.

By providing the fixing member 512 and the fixing post 513, the electrode 500 is locked to the front case, so that the electrode 500 can be stably fixed to a set area without being biased loose by external force.

Optionally, the processing circuit 311 includes a circuit board 3110, and the circuit board 3110 forms a avoidance groove 3113 corresponding to a position of the fixing leg 513, so that the fixing leg 513 passes through the avoidance groove 3113 to be fixed with the circuit board 3110, thereby fixing the front case 400 with the circuit board 3110 without being offset loose due to an external force.

Alternatively, in another embodiment of the present utility model, the portable beauty instrument includes a spring needle assembly, the housing 10 is provided with a through hole in a connection region, an end aperture of the through hole adjacent to the inside of the housing 10 is larger than an end aperture of the through hole adjacent to the outside of the housing 10, the first electrode 510 has a shape adapted to the shape of the through hole and is limited by inserting the through hole into the housing 10, and the spring needle assembly is disposed between the first electrode 510 and the processing circuit 311 to electrically connect the first electrode 510 and the processing circuit 311.

Accordingly, the front case and the circuit board 3110 may be fixed together by the latch assembly, and the first electrode 510 and the processing circuit 311 are electrically connected by the latch assembly.

Alternatively, in still another embodiment of the present utility model, the portable beauty instrument includes a magnet, the housing 10 is provided with a groove in the connection region, the first electrode 510 is embedded in the groove, and the magnet is located in the first electrode 510 or the housing 10 to attract the first electrode 510 to the groove. The first electrode 510 and the case 10 are connected and fixed by magnetic force.

In this embodiment, the first electrode 510 is pluggable. Alternatively, the user can use the portable beauty treatment apparatus to clean the face by pulling out the first electrode 510 and covering the cleaning cloth/paper on the end of the beauty treatment apparatus and inserting the first electrode 510 back into the groove, thus fixing the cleaning cloth/paper on the end of the beauty treatment apparatus.

By disposing the magnet in the first electrode 510 or the housing 10, the portable cosmetic instrument can be increased in cleaning function. The cleaning cloth/paper is sandwiched between the first electrode 510 and the front case 400, and a user can clean a skin site using the portable cosmetic instrument. For example, cloth/paper having a specific function may be sandwiched between the first electrode 510 and the front case 400. The cloth/paper with specific efficacy can be a facial mask, and the facial mask can be clamped between the first electrode 510 and the front shell 400, so that the deep skin part can be accelerated to absorb moisture of the facial mask to achieve the effects of moisturizing and whitening.

Alternatively, in another embodiment of the utility model, the first electrode 510 comprises a ring electrode 500 surrounding the end of the housing 10. By providing the ring electrode 500 around the end of the housing 10, the user can make the first electrode 510 of the cosmetic instrument contact the skin without intentionally adjusting the angle of the cosmetic instrument during use, so that the range of movement of the user's hand can be smaller during use, adapting to the ergonomics, and the use is convenient and labor-saving for the user, and the use comfort is improved. Meanwhile, as the hand activity is reduced, the shaking of the portable beauty instrument is reduced, so that the skin part of a user is better experienced during beauty treatment, and the user experience is improved.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (12)

1. A portable cosmetic instrument, comprising:

a housing comprising an end portion for contacting the skin to be treated and a side portion for holding;

a first electrode provided in a connection region between an end portion and a side portion of the case;

and the processing circuit is positioned in the shell and connected with the first electrode.

2. The portable cosmetic apparatus according to claim 1, wherein,

the end part and the side part are provided with an included angle smaller than 120 degrees, the connecting area is a bending area between the end part and the side part, the number of the first electrodes is two, the first electrodes extend along the bending line of the bending area, one part of each first electrode is positioned at the end part, and the rest part is positioned at the side part.

3. The portable cosmetic apparatus according to claim 1, comprising:

a fixing member;

the shell is provided with a through hole in the connecting area, one side of the first electrode facing the inside of the shell is provided with a fixing part, and the fixing part is used for fixing the fixing part of the first electrode in the shell through the through hole so as to fix the first electrode in the shell.

4. A portable cosmetic apparatus according to claim 3, comprising:

the sealing ring is sleeved on the fixing part or the fixing piece to seal a gap between the fixing part and the inner wall of the through hole or seal a gap between the fixing piece and the inner wall of the through hole.

5. The portable cosmetic apparatus of claim 4, comprising:

the shell is in the connecting area is provided with a mounting groove, the shape of the mounting groove is matched with that of the first electrode, the groove depth of the mounting groove is matched with that of the first electrode, the first electrode is embedded in the mounting groove, the through hole is formed in the groove bottom of the mounting groove, and the sealing ring is located between the first electrode and the groove bottom.

6. A portable cosmetic apparatus according to claim 3, comprising:

a middle frame having a first mounting plate extending in a first direction and a second mounting plate extending in a second direction, the first mounting plate having first and second sides disposed opposite each other and a third side connecting between the first and second sides, the second mounting plate having first and second sides disposed opposite each other, the second mounting plate being connected to the third side of the first mounting plate by the first side;

the shell comprises a front shell, a first side shell and a second side shell, wherein the first side shell and the second side shell are respectively arranged on two opposite sides of the first mounting plate and form a first accommodating space and a second accommodating space separated by the first mounting plate together with the second mounting plate;

the front shell is arranged opposite to the second side face of the second mounting plate and forms a third accommodating space with the second mounting plate, the front shell comprises the end portion and the side portion, and the processing circuit is arranged in the second accommodating space.

7. The portable cosmetic apparatus according to claim 6, wherein,

the connecting area of the front shell extends obliquely to the third accommodating space in a direction inclined to the end part to form a fixing column, the through hole axially penetrates through the fixing column, and the fixing piece is obliquely inserted into the through hole.

8. The portable cosmetic apparatus of claim 7, wherein,

the processing circuit comprises a circuit board, and an avoidance groove is formed at the position of the circuit board corresponding to the fixing column.

9. The portable cosmetic apparatus according to claim 1, comprising:

a spring needle assembly;

the shell is provided with a through hole in the connecting area, the aperture of one end of the through hole adjacent to the inside of the shell is larger than the aperture of one end of the through hole adjacent to the outside of the shell, the first electrode is provided with a shape matched with the shape of the through hole and is limited by inserting the through hole into the shell, and the elastic needle assembly is arranged between the first electrode and the processing circuit so as to electrically connect the first electrode and the processing circuit.

10. The portable cosmetic apparatus according to claim 1, comprising:

a magnet;

the shell is provided with a groove in the connecting area, the first electrode is embedded in the groove, and the magnet is positioned in the first electrode or the shell so as to adsorb the first electrode in the groove.

11. The portable cosmetic apparatus according to claim 1, comprising:

and a second electrode which is arranged at the end part of the shell and is connected with the processing circuit.

12. The portable cosmetic apparatus according to claim 1, wherein,

the first electrode includes a ring electrode surrounding an end of the housing.