CN106920908B

CN106920908B - Small-sized electric device and beauty appliance

Info

Publication number: CN106920908B
Application number: CN201611168206.0A
Authority: CN
Inventors: 冈村武则
Original assignee: Maxell Holdings Ltd
Current assignee: Maxell Ltd
Priority date: 2015-12-28
Filing date: 2016-12-16
Publication date: 2021-03-26
Anticipated expiration: 2036-12-16
Also published as: CN106920908A; JP2017120730A; JP6671954B2

Abstract

The invention provides a small-sized electric device and a beauty appliance, which can reduce the space occupied by a battery and a battery shell in the main body shell and miniaturize the main body shell. A battery case (26) having a battery housing section (28) is provided inside the main body case (1). The battery case (26) is provided with holding walls (29L, 29R) that are in contact with the peripheral surface of the battery (27), and a loading opening (31) for loading the battery (27). A relief portion (32) for receiving a part of the peripheral surface of a battery (27) loaded in the battery housing portion (28) is formed in the holding walls (29L, 29R) facing the loading port (31). The escape part (32) is formed by a through hole.

Description

Small-sized electric device and beauty appliance

Technical Field

The present invention relates to a small-sized electric device including a battery for driving an electronic component, and more particularly, to an improvement in a structure of a battery housing provided in a main body case and an improvement in a protective cover for covering an outer surface of a skin treatment head provided at one end of the main body case of a beauty appliance.

Background

As for the structure of the battery housing, a battery case of patent document 1 is known. The battery case is composed of a square box-shaped case and a lid for closing an upper opening of the case, and a cylindrical battery can be housed in the case. Holding ribs for receiving the peripheral surface of the battery are provided at two positions in the longitudinal direction of the bottom wall of the case in a protruding manner, and a partially arc-shaped holder for receiving the periphery of the battery is formed at the upper end of the bottom wall of the case. Further, a guide rib slidably guided to the holder along the end peripheral edge of the battery is provided so as to protrude adjacent to one of the holding ribs. In a state where the battery is housed in the case and attached to the holding rib, a gap is formed between a lower peripheral surface of the battery and a bottom wall of the case.

The cosmetic device of the present invention is applied to, for example, a cosmetic device for applying thermal stimulation to a skin surface or supplying electric current, but such a cosmetic device is known from patent document 2 proposed by the present applicant. Therefore, a skin treatment head including a warm head and a cold head is provided at one end of the main body case, and the warm head also serves as a skin electrode.

Documents of the prior art

Patent document 1: japanese Kokai publication Hei 4-24260 (page 4, lines 3-18, FIG. 1)

Patent document 2: japanese patent laid-open No. 2014-184001 (paragraphs 0052 to 0053, FIG. 3)

According to the battery case of patent document 1, the lower peripheral surface of the battery is received by the partially arc-shaped bracket of the holding rib in a state where the battery is housed in the case, and therefore, the battery can be held in a stable state. However, since a gap is formed between the lower peripheral surface of the battery housed in the case and the bottom wall of the case, it is inevitable that the space occupied by the battery case becomes large. In addition, when the battery case is housed inside the main body case of the small-sized electric device, the main body case is likely to be large.

Disclosure of Invention

The invention provides a small-sized electric device which can reduce the space occupied by a battery and a battery case in a main body case, miniaturize the main body case, reliably prevent the battery mounted in a battery housing part from floating, and exert a power supply function in a stable state for a long time.

The invention aims to provide a beauty appliance which can strengthen the protection function of a protective cover mounted on a skin treatment head, and can make the protection structure of the protective cover appropriate and strengthen the structure strength.

The small-sized electric device of the present invention is provided with a battery case 26 having a battery housing 28 in a main body case 1. The battery case 26 includes

holding walls

29L and 29R that receive the peripheral surface of the battery 27, and a loading port 31 for attaching the battery 27. As shown in fig. 1, the

holding walls

29L and 29R facing the loading port 31 are formed with relief portions 32 that receive a part of the peripheral surface of the battery 27 loaded in the battery housing portion 28.

As shown in fig. 1, the escape portion 32 is formed of a through hole.

A part of the peripheral surface of the battery 27 loaded in the battery housing portion 28 enters the escape space S of the escape portion 32 from the inner surface of the

holding walls

29L, 29R.

The amount T2 of entering the battery 27 into the escape space S is set to be equal to or more than half the thickness T1 of the escape space S.

Holding

claws

33 and 34 for pressing the peripheral surface of the battery 27 exposed to the loading port 31 and restricting the removal of the battery 27 are provided at opposite side portions of the loading port 31. The length H1 of the holding claws 34 provided on one side portion protruding from the loading port 31 is set to be greater than the length H2 of the holding claws 33 provided on the other side portion protruding from the loading port 31 (see fig. 1).

A pair of holding end walls 30 are provided continuously with both ends in the longitudinal direction of the

holding walls

29L, 29R. As shown in fig. 5, an elastic piece 35 for pressing the battery 27 loaded in the battery housing portion 28 against the opposing holding end wall 30 is provided on one of the holding end walls 30.

As shown in fig. 4, the battery case 26 is formed in a rectangular case shape by a pair of

holding walls

29L, 29R and a pair of holding end walls 30. Fastening seats 37 formed to protrude toward both outer ends of the

holding walls

29L and 29R are fixed to the main body case 1 by fasteners 39.

An elastic body 46 (see fig. 1 and 5) that is in close contact with the peripheral surface of the battery 27 is provided on the inner surface of the main body case 1 facing the loading port 31 of the battery housing 28.

As shown in fig. 12 and 13, a plurality of reinforcing ribs 76 bridging the pair of

holding walls

29L and 29R are formed on the outer opening side of the escape portion 32. The peripheral surface of the battery 27 entering the escape space S of the escape portion 32 is received by the processing rib 76.

The beauty apparatus of the present invention is provided with a skin treatment head 2 including a skin electrode 24 at an end portion of a main body case 1, and a protective cover 51 is detachably attached to an outer surface of the skin treatment head 2. The ring-shaped cover 11 for attaching the cotton pad M to the skin electrode 24 is detachably attached to the skin electrode 24. As shown in fig. 7, the protective cover 51 can be attached to and detached from the skin treatment head 2 with the cover 11 attached to the skin electrode 24.

A head case 13 is provided to protrude from the front end of the main body case 1, and a skin electrode 24 is provided at the front end of the case 13. The head case 13 includes a neck portion 22 protruding from a base end thereof and a cap mounting portion 23 protruding from a distal end of the neck portion 22. The protective cover 51 integrally includes a front protective portion 52 covering the front and upper surfaces of the skin electrode 24, and a pair of clip pieces 64 (see fig. 10) detachably attached to the neck portion 22 from above the skin treatment head 2. In a state where the clip piece 64 is fitted to the neck portion 22, as shown in fig. 7, the regulating portion 65 is fitted and held by the head case 13 and the main body case 1 so as to be immovable forward and backward, and the front cover wall 54 of the front protective portion 52 is opposed to the skin electrode 24 with a small gap therebetween.

The protective cover 51 includes a front protective portion 52 that covers the outer surface of the skin electrode 24, and a rear protective portion 53 that covers the upper portion and the upper rear surface of the main body case 1. The front guard 52 and the rear guard 53 are connected by a pair of left and right elastically deformable band-shaped lateral bridging walls 60. As shown in fig. 9, clip pieces 64 are provided on the inner surface of the lateral bridging wall 60.

The lateral bridging wall 60 is composed of a valley portion 62 recessed toward the inner surface of the protective cover 51 and a peak portion 63 projecting toward the outer surface continuously from the valley portion 62.

A finger hook piece 66 for attaching and detaching the protective cover 51 is provided projecting from the outer surface of the lateral bridging wall 60.

Finger tabs 66 project from the valleys 62 of the bridging walls 60.

The upper portions of the front guard 52 and the rear guard 53 are connected to each other by a band-shaped upper bridging wall 61. A restriction portion 65 is formed on the inner surface of the upper bridging wall 61.

A louver 67 is provided between the upper bridging wall 61 and the left and right lateral bridging walls 60.

As shown in fig. 11, a mounting piece 73 is provided to protrude from the outer surface of either one of the front protective portion 52 and the rear protective portion 53. The clip end of the main body case 1 and the placing piece 73 abut against the placing surface F, and support the main body case 1 in a lying state.

The effects of the present invention are as follows.

In the present invention, a battery case 26 having holding

walls

29L and 29R and a loading port 31 is provided inside a main body case 1. In addition, relief portions 32 that receive a part of the peripheral surface of the battery 27 loaded in the battery housing portion 28 are formed in the

holding walls

29L, 29R facing the loading port 31. In this way, if the relief portion 32 is formed inside the battery case 26, in a state where the battery 27 is loaded in the battery housing portion 28, a part of the peripheral surface of the battery 27 enters the relief space S of the relief portion 32, so that the space occupied by the battery 27 and the battery case 26 inside the main case 1 can be reduced, and the size of the main case 1 can be reduced accordingly.

When the relief portion 32 is formed by the through hole, the thickness T1 of the relief space S can be increased as compared with the case where the relief portion 32 is formed as a concave portion, and the space occupied by the battery 27 and the battery case 26 can be further reduced.

When a part of the peripheral surface of the battery 27 loaded in the battery housing portion 28 enters the space S of the escape portion 32 from the inner surfaces of the

holding walls

29L and 29R, the peripheral surface of the battery 27 is held at two places by the left and right peripheral walls of the space S, and the battery can be held in a stable state.

The amount T2 of entering the battery 27 into the escape space S is preferably set to be equal to or more than half the thickness T1 of the escape space S. If the amount T2 of entering the battery 27 is less than half the thickness T1 of the escape space S, the effect of reducing the space occupied by the battery 27 and the battery case 26 inside the main body case 1 cannot be sufficiently exhibited. More preferably, the amount T2 of entering the battery 27 is the same as the thickness T1 of the escape space S. When the amount T2 of the battery 27 exceeds the thickness T1 of the escape space S, the peripheral surface of the battery 27 is exposed from the inner wall of the battery case 26, and therefore, a space for housing the exposed portion needs to be secured.

When the

holding claws

33 and 34 are provided at the facing portions of the loading port 31, the peripheral surface of the battery 27 exposed to the outside of the loading port 31 is pressed and held by the

holding claws

33 and 34, and the battery 27 can be reliably prevented from being pulled out from the battery case 26. Further, if the length H1 of the holding claws 34 provided on one side portion protruding from the loading port 31 is set to be larger than the length H2 of the holding claws 33 provided on the other side portion protruding from the loading port 31, the battery 27 can be easily loaded in the battery housing 28. In detail, by placing the battery 27 on the side of the holding claw 34 having a large protruding length H1 and temporarily assembling it, the battery 27 can be tightly fitted into the battery case 26 by pressing the peripheral surface of the battery in advance to the holding claw 33 having a small protruding length H2.

According to the battery case 26 in which the elastic piece 35 is provided on one of the holding end walls 30, the battery 27 loaded in the battery housing portion 28 is pressed against the opposing holding end wall 30 by the elastic piece 35, and the movement of the battery 27 in the longitudinal direction can be restricted. Therefore, in addition to holding and fixing the battery 27 by the holding

walls

29L, 29R and the holding

claws

33, 34, the battery 27 is held and fixed even by the elastic deformation force of the elastic piece 35, and the battery 27 can be held and fixed more reliably.

When the relief portion 32 is formed inside the battery case 26 formed in a rectangular case shape, the structural strength of the battery case 26 is easily weakened. However, when the fastening seat 37 is protruded from the holding

walls

29L and 29R of the battery case 26 and the fastening seat 37 is fixed to the main body case 1 by the fastening body 39, the bending deformation of the holding

walls

29L and 29R receiving the external force can be reliably prevented, and the structural strength of the battery case 26 can be enhanced to improve the durability. In addition, the battery case 26 can reinforce the case strength of the main body case 1 to improve rigidity.

According to the power supply portion structure in which the elastic body 46 that is in close contact with the peripheral surface of the battery 27 is provided on the inner surface of the main body case 1 facing the loading port 31 of the battery housing portion 28, the battery 27 can be pressed against the battery case 26 by the elastic body 46 that is elastically deformed, and the operation of the battery 27 can be restricted. In addition, even in the case where there is a small gap between the battery 27 and the holding

claws

33, 34, the battery 27 can be restricted from rattling by the elastic body 46, and noise can be prevented from being generated.

If a plurality of reinforcing ribs 76 bridging the pair of holding

walls

29L, 29R are formed on the outer opening side of the escape 32, the holding

walls

29L, 29R adjacent to each other across the escape 32 can be reinforced by the reinforcing ribs 76, and the structural strength of the battery case 26 can be enhanced. Further, by receiving the peripheral surface of the battery 27 entering the escape space S of the escape portion 32 with the reinforcing rib 76, the battery 27 can be positioned at an appropriate loading position.

In the beauty treatment instrument of the present invention, a protective cover 51 is detachably attached to the outer surface of the skin treatment head 2 of the main body case 1. At this time, the protective cover 5 can be attached to and detached from the skin treatment head 2 with the cover 11 for a cotton pad press-fitted to the skin electrode 24. According to such a beauty appliance, it is not necessary to remove the cover 11 from the skin electrode 24 and store the cover and the main body case 1 separately when not in use, and it is possible to reliably prevent the cover 11 and the like from being mixed in or lost.

According to the protective cover 51 including the front protective portion 52 and the pair of clip pieces 64 covering the periphery of the skin electrode 24, the protective cover 51 can be easily attached to the skin treatment head 2 only by engaging and attaching the clip pieces 64 to the neck portion 22. In addition, in a state where the protective cover 5 is attached to the skin treatment head 2, since the front cover wall 54 of the front protective portion 52 and the skin electrode 24 face each other with a small gap therebetween, the front cover wall 54 and the skin electrode 24 can be prevented from rubbing against each other, and the skin electrode 24 can be reliably prevented from being damaged. In a state where the clip piece 64 is engaged with and attached to the neck portion 22, the clip claws 70 of the clip piece 64 preferably come into close contact with the lower half circumferential surface of the neck portion 22.

In the protective cover 51 including the front protective portion 52 and the rear protective portion 53, the front and rear

protective portions

52 and 53 are connected by a pair of elastically deformable strip-shaped lateral bridging walls 60, and a clip piece 64 is provided on the inner surface of the lateral bridging wall 60. According to the protective cover 51, when the clip piece 64 is engaged with the neck portion 22 while being elastically deformed, the lateral bridging wall 60 is elastically deformed at the same time, and the engagement load is prevented from being concentrated on the clip piece 64, so that the fatigue fracture can be eliminated early.

When the lateral bridging wall 60 is formed of the inwardly concave valley portion 62 of the protective cover 51 and the outwardly convex peak portion 63, the length of the elastically deformable wall portion can be increased as compared with the case where the lateral bridging wall 60 is formed of a flat strip-shaped wall, and the lateral bridging wall 60 can be easily elastically deformed.

According to the protective cover 51 in which the finger hook pieces 66 are provided so as to protrude from the outer surface of the lateral bridging wall 60, the protective cover 51 can be easily and reliably attached and detached by attaching and detaching the protective cover 51 to and from the neck portion 22 in a state where the thumb and the index finger are hooked on the left and right finger hook pieces 66 in advance. Further, since the protective cover 51 can be attached to and detached from the neck portion 22 appropriately and reliably, the front cover wall 54 and the skin electrode 24 can be prevented from rubbing against each other during attachment and detachment, and the skin electrode 24 can be prevented from being damaged.

If the finger hook pieces 66 are provided so as to protrude from the trough portions 62 of the lateral bridging walls, the trough portions 62 can be reinforced by the finger hook pieces 66, and the trough portions 62 can be prevented from being excessively deformed when the lateral bridging walls 60 are elastically deformed in the expanding direction. Further, since the finger hook pieces 66 are provided in the vicinity of the clip claws 70, the pushing force and the pulling force applied to the finger hook pieces 66 can be effectively transmitted to the clip claws 70, and the protective cover 51 can be attached to and detached from the skin treatment head 2 with a good click feeling.

When the front protector 52 and the rear protector 53 are connected by the upper bridging wall 61 and the regulating portion 65 is formed on the inner surface thereof, the front protector 52 and the rear protector 53 can be positioned by the regulating portion 65 in a state where the protective cover 51 is attached to the skin treatment head 2. Further, since the rear guard portion 53 is supported by three of the left and right lateral bridging walls 60 and the upper bridging wall 61, the structural strength of the rear guard portion 53 can be enhanced.

When the ventilation window 67 is formed between the upper bridging wall 61 and the lateral bridging wall 60, the surface of the skin treatment head 2 facing the ventilation window 67 can be made to face the external space in a state where the protective cover 51 is attached to the skin treatment head 2, and therefore, drying of the cosmetic liquid or the like adhering to the surface of the skin treatment head 2 can be promoted.

When the placement piece 73 is provided so as to protrude from either the front protective section 52 or the rear protective section 53, the beauty appliance can be placed in a state in which the clip end of the main body case 1 and the placement piece 73 are in contact with the placement surface F, and thus the beauty appliance can be placed in a stable state in a lying posture without rattling.

Drawings

Fig. 1 is a sectional view taken along line a-a of fig. 5.

Fig. 2 is a front view of a beauty appliance according to a first embodiment of the present invention.

Fig. 3 is a side view of the beauty appliance with the cover and the protective cover separated.

Fig. 4 is a rear view of the front case and the battery case.

Fig. 5 is a cross-sectional view taken along line B-B in fig. 2, showing the configuration of the power supply unit.

Fig. 6 is a cross-sectional top view of the battery unit and the battery.

Fig. 7 is a vertical sectional side view of the beauty appliance with the protective cover attached.

Fig. 8 is a plan view of the protective cover and the cosmetic device.

Fig. 9 is a cross-sectional view taken along line C-C of fig. 7.

Fig. 10 is a sectional view taken along line D-D of fig. 7 with only the protective cap.

Fig. 11 is a side view of the beauty treatment instrument placed on the placement surface.

Fig. 12 is a cross-sectional top view of a battery case according to a second embodiment of the present invention.

Fig. 13 is a perspective view of a battery case according to a second embodiment of the present invention.

Fig. 14 is a cross-sectional plan view of a power supply unit according to a third embodiment of the present invention.

In the figure: 1-main body case, 2-skin treatment head, 3-warm head, 4-cold-hot head, 13-head case, 15-power supply section, 16-control substrate, 22-neck section, 23-cap mounting section, 24-skin electrode, 26-battery case, 27-battery cell (battery), 28-battery housing section, 29L, 29R-retaining wall, 31-filling opening, 32-escape section, 33, 34-retaining claw, 35-elastic sheet, 46-elastic body, 51-protective cover, 52-front protective section, 53-rear protective section, 54-front cover wall, 55-front support wall, 57-rear support wall, 58-rear cover wall, 60-transverse bridging wall, 61-upper bridging wall, 64-clip sheet, 65-restriction section, 66-finger hook sheet, 70-clip claw.

Detailed Description

(embodiment one)

Fig. 1 to 11 show a first embodiment of a beauty appliance (small electric device) according to the present invention. Note that the front-back, left-right, and up-down of the present invention are represented by intersecting arrows shown in fig. 2 and 3, and the front-back, left-right, and up-down expressed in the vicinity of each arrow.

In fig. 2 and 3, the beauty treatment instrument includes a vertically long main body case 1 also serving as a clip, and a skin treatment head 2 provided on an upper portion of the main body case 1. The skin treatment head 2 includes a thermal head 3 provided on the upper front surface of the main body casing 1 and a thermal head 4 protruding from the upper rear surface of the main body casing 1. An oval switch panel 5 is provided at a lower part of a front surface of the main body case 1, and a power button part 6 for power connection, a mode button part 7 for switching an operation mode, and a switching button part 8 for switching intensity of an applied voltage are provided on a surface thereof. Four mode indicator Lamps (LEDs) 9 that light up according to the operation mode and three intensity indicator Lamps (LEDs) 10 that light up according to the intensity of the current stimulus are provided on the upper case surface of the switch panel 5. The main body case 1 is composed of a front case 1a and a rear case 1b formed by dividing the front and rear portions, and the front and

rear cases

1a and 1b are fastened by three screws screwed from the rear case 1b side to form a vertically long hollow case. In fig. 3, reference numeral M denotes a cotton pad, and reference numeral 11 denotes a ring-shaped cover for attaching the cotton pad M to the thermal head 3. An engagement rib 11a for press-fitting engagement with a cover mounting portion 23 described later is provided projecting from the rear opening edge of the cover 11.

A head case 13 is provided to protrude from the front end of the main body case 1, and the thermal head 3 is fixed to the front end of the case 13. The cold/hot head 4 is disposed on the upper rear surface of the main body casing 1 in a state exposed to the outside of the casing. Further, at the lower rear surface of the main body case 1, a vertically long oval clip electrode 14 serving also as a heat dissipation plate is exposed. The power supply unit 15 is disposed inside the main body case 1, and the control board 16 is disposed on the front surface side thereof. A heater 17 is disposed in the warm head 3, and a Peltier element 18 and a cooler 19 are disposed in the cold head 4. A control circuit for controlling the operating states of the heater 17, the peltier element 18, and the like is mounted on the control board 16, and switches corresponding to the above-described

buttons

5, 6, and 7, and the

display lamps

9 and 10, and the like are mounted thereon (see fig. 5).

In fig. 3, the thermal head 3 is composed of a heat conductor 21 that closes an outer opening of the head case 13 fixed to the main body case 1, a heater 17 provided inside the head case 13, and the like. The head case 13 made of a plastic molded product includes a cylindrical neck portion 22 provided on a protruding base end thereof and a cap mounting portion 23 formed by bulging a distal end of the neck portion 22, and the heat conductor 21 is fixed to a distal end of the cap mounting portion 23. The heat conductor 21 also serves as the skin electrode 24 and is formed of a lid-shaped press-formed product made of a titanium plate material. The skin electrode 24 applies a weak pulse current to the skin surface by the human body in cooperation with the previous clip electrode 14, and gives current stimulation for ion introduction or ion extraction. As shown in fig. 7, the cover 11 can be stored in a state of being attached to the cover attachment portion 23.

In fig. 4, the power supply unit 15 is composed of a battery case 26 fixed to the main body case 1 and a battery unit (battery) 27 attached to the battery case 26, and supplies electric power to the skin electrode 24, the clip electrode 14, the heater 17, the peltier element 18, and the

display lamps

9 and 10, and to a control circuit that drives these electronic components. A battery housing 28 for housing a battery unit 27 is provided inside the battery case 26. As shown in fig. 1 and 4, the battery case 26 is configured in a rectangular case shape by a pair of left and right holding

walls

29L, 29R and a pair of holding end walls 30 continuous with both upper and lower ends (both ends in the longitudinal direction) of the holding

walls

29L, 29R, and a loading opening 31 is opened in the rear surface thereof. Further, a through hole as a relief portion 32 is formed in the inner portion of the battery case 26, i.e., between the left and right holding

walls

29L, 29R. Holding

claws

33 and 34 for restricting the battery unit 27 from being pulled out from the battery housing 28 are provided at the upper and lower sides of the left and right opposite side portions of the loading port 31. As described above, when the holding

claws

33 and 34 are provided at the opposite side portions of the loading port 31, the peripheral surface of the battery cell 27 exposed to the outside of the loading port 31 is pressed and held by the holding

claws

33 and 34, and the battery cell 27 can be reliably prevented from being pulled out from the battery case 26. In fig. 4, the battery case 26 and the front case 1a are viewed from the back side, and therefore the relationship between the right and left is reversed.

As shown in fig. 1, the holding claws 33 provided on the holding wall 29L having a partially circular-arc-shaped cross section are formed as partially circular-arc-shaped projections continuous with the holding wall 29L, while the holding claws 34 provided on the holding wall 29R bent in a cross section are formed as projections bent in an L shape. The length H1 of the latter holding claws 34 protruding from the loading port 31 is set to be greater than the length H2 of the former holding claws 33 protruding from the loading port 31. An elastic piece 35 for pressing the battery cell 27 loaded in the battery housing portion 28 against the lower holding end wall 30 is provided on the inner surface of the upper holding end wall 30, and lead notches 36 for leading out the output leads 45 of the battery cell 27 are formed at the lower corners of the lower holding end wall 30. Fastening seats 37 are formed to protrude from the upper and lower ends of the outer surfaces of the left and right holding

walls

29L, 29R, and these fastening seats 37 are coupled to screw bosses 38 provided on the inner surface of the front case 1a by screws (fastening members) 39, whereby the battery case 26 and the front case 1a are integrated. Heat radiation windows 40 are opened in wall surfaces of the left and right holding

walls

29L, 29R facing the holding

claws

33, 34, respectively.

As shown in fig. 6, the battery unit 27 is configured such that a battery main body 42 made of a cylindrical secondary battery and a protective circuit board 43 closely arranged on the peripheral surface of the battery main body 42 are covered with a shrink film 44, and an output lead 45 is led out from the protective circuit board 43. When overcharge, overvoltage, or overdischarge occurs, the protection circuit board 43 operates a switching mechanism including an IC and an FET mounted on the board to disconnect the power supply line. The battery unit 27 is previously loaded in the battery housing 28, integrated with the front case 1a in the manner described above, and the battery unit 27 is sealed in the main body case 1 by fastening and fixing the rear case 1b to the front case 1a in this state.

The peripheral surface of the battery unit 27 loaded in the battery housing portion 28 is held by a pair of left and right holding

walls

29L, 29R, and the peripheral surface of the battery unit 27 exposed to the loading port 31 is pressed and held by the holding

claws

33 and 34, thereby restricting the battery unit 27 from being pulled out of the battery housing portion 28. At the same time, the battery unit 27 is pressed against the lower holding end wall 30 by the elastically deformed elastic piece 35, and the movement of the battery unit 27 in the longitudinal direction is restricted. Further, an elastic body 46 made of rubber is provided on the inner surface of the rear case 1b facing the loading port 31 so as to be in close contact with the peripheral surface of the battery unit 27, and the battery unit 27 is pressed against the battery case 26 by the elastic body 46 that has been elastically deformed in a state where the rear case 1b is fastened and fixed to the front case 1 a. As shown in fig. 5, the elastic body 46 is formed of a rubber strip long up and down. When the elastic body 46 is provided on the inner surface of the rear case 1b in this manner, the battery 27 is pressed against the battery case 26 by the elastic body 46 that is elastically deformed, and the operation of the battery 27 can be restricted. Even if there is a slight gap between the battery 27 and the holding

claws

33 and 34, the elastic body 46 can restrict the battery 27 from rattling, and noise can be prevented from being generated.

As described above, the reason why the protruding length H1 of the holding claws 34 from the loading port is set to be larger than the protruding length H2 of the holding claws 33 from the loading port 31 is to facilitate loading of the battery unit 27 in the battery housing 28. Specifically, when the battery unit 27 is loaded, the battery unit 27 is temporarily assembled by placing the battery unit between the holding claws 34 and the holding walls 29R with the protective circuit board 43 side as a loading start end as shown by the imaginary line in fig. 6. In this state, the arc-shaped peripheral surface of the battery cell 27 is pressed against the holding claws 33, and the holding

claws

33 and 34 are loaded in the battery housing section 28 while being elastically deformed, whereby the battery cell 27 is loaded in the battery housing section 28. In other words, the battery unit 27 can be fitted tightly into the battery case 26 by temporarily assembling the battery unit 27 on the side of the holding claws 34 having a large projection length H1, and bringing the peripheral surface of the battery unit 27 into contact with the holding claws 33 having a small projection length H2 to perform a press-in operation. The projecting ends of the holding claws 34 and the projecting ends of the holding claws 33 are located at a position lower than the top of the battery cell 27 (the position where the battery cell collides with the elastic body 46) mounted in the battery case 26. This is because, when the projecting ends of the holding claws 34 and the projecting ends of the holding claws 33 are located higher than the top of the battery cell 27, the height space occupied by the battery case 26 and the battery cell 27 increases, and the battery cannot be downsized.

As described above, in the state where the battery unit 27 is loaded in the battery housing portion 28, a part of the peripheral surface of the battery unit 27 enters the space S of the escape portion 32 from the inner surface of the holding

walls

29L, 29R. As shown in fig. 6, the amount T2 of the battery cell 27 entering the escape space S is preferably at least half the thickness T1 of the escape space S. If the amount T2 of entering the battery cell 27 is less than half the thickness T1 of the escape space S, the effect of reducing the space occupied by the battery 27 and the battery case 26 inside the main body case 1 cannot be sufficiently exhibited. More preferably, as shown in fig. 6, the amount T2 of the battery 27 entering is the same as the thickness T1 of the escape space S, and in this case, the lower portion of the arc circumferential surface of the battery cell 27 is the same as the lower opening surface of the escape portion 32.

If the escape portion 32 is formed in the inner side (front side) of the battery case 26, in a state where the battery unit 27 is loaded in the battery housing portion 28, a part of the peripheral surface of the battery unit 27 enters the escape space S of the escape portion 32, and therefore, the space occupied by the battery unit 27 and the battery case 26 in the main body case 1 can be reduced, and the main body case 1 can be made smaller. In a state where the battery unit 27 is loaded in the battery housing 28, two locations of the peripheral surface of the battery unit 27 are caught by the left and right peripheral wall of the escape space S, and therefore, the battery unit 27 can be held in a stable state.

If the relief portion 32 is formed as a through hole in the inner surface (front surface) of the rectangular case-shaped battery case 26, the structural strength of the battery case 26 is reduced and the battery case is easily fragile. However, when the fastening seats 37 are protruded toward both outer ends of the holding

walls

29L and 29R of the battery case 26 and the fastening seats 37 are fixed to the main body case 1 by the screws 39, the holding

walls

29L and 29R receiving an external force can be reliably prevented from being bent and deformed. Therefore, the structural strength of the battery case 26 can be increased and the durability can be improved, and the case strength of the main body case 1 can be increased by the battery case 26 and the rigidity can be improved.

In order to protect the warm head 3 and the cold/hot head 4 of the beauty appliance in an unused state, a protective cover 51 is provided to cover the entire skin treatment head 2. As shown in fig. 7 and 8, the protective cover 51 is formed of a hood-shaped plastic molded product including a front protective portion 52 covering the front and upper surfaces of the thermal head 3 and the skin electrode 24, and a rear protective portion 53 covering the upper portion of the main body case 1 and the thermal head 4 provided on the upper rear surface of the case 1. The front protection portion 52 includes a circular front cover wall 54 covering the front surfaces of the thermal head 3 and the skin electrode 24, and a front tapered front support wall 55 covering the upper half peripheral surfaces of the skin electrode 24 and the cover attachment portion 23. The rear protection portion 53 includes a rear support wall 57 covering the upper end peripheral surface of the main body case 1 and a circular rear cover wall 58 covering the rear surface of the thermal head 4.

The front protector 52 and the rear protector 53 are integrated by a pair of left and right elastically deformable band-shaped lateral bridging walls 60 and a band-shaped upper bridging wall 61 that connects the upper portions of the

protectors

52, 53. Each of the bridging

walls

60, 61 is formed in an m-shape by a valley portion 62 recessed toward the inner surface of the protective cover 51 and a peak portion 63 projecting outward continuously from the valley portion 62, and a clip piece 64 is provided on the inner surface of the valley portion 62 of the pair of lateral bridging walls 60, and a regulation portion 65 is provided on the inner surface of the valley portion 62 of the upper bridging wall 61. Further, triangular finger hook pieces 66 for attaching and detaching the protective cover 51 are provided on the outer surfaces of the lower portions 62 of the pair of lateral bridging walls 60. The front support wall 55 and the rear support wall 57 between the cross bridging wall 60 and the upper bridging wall 61 are hollowed out as ventilation windows 67. In this way, when the ventilation window 67 is opened between the upper bridging wall 61 and the left and right lateral bridging walls 60, the surface of the skin treatment head 2 facing the ventilation window 67 can be made to face the external space in a state where the protective cover 51 is attached to the skin treatment head 2, and therefore, drying of the cosmetic liquid or the like adhering to the surface of the skin treatment head 2 can be promoted.

As described above, when the lateral bridging wall 60 is formed of the valley portions 62 and the peak portions 63, the length of the elastically deformable wall portion can be increased as compared with the case where the lateral bridging wall 60 is formed of a flat strip-shaped wall, and the lateral bridging wall 60 can be easily elastically deformed. Further, since the finger hook pieces 66 are provided so as to protrude from the outer surface of the lateral bridging wall 60, the protective cover 51 can be easily and reliably attached and detached by attaching and detaching the protective cover 51 to and from the neck portion 22 in a state where the thumb and the index finger are hooked on the left and right finger hook pieces 66. Further, since the protective cover 51 can be reliably attached to and detached from the neck portion 22, the front cover wall 54 and the skin electrode 24 can be prevented from rubbing against each other during attachment and detachment. In particular, when the finger hook piece 66 is provided so as to protrude from the trough portion 62, the configuration of the trough portion 62 can be reinforced by the finger hook piece 66, and the trough portion 62 is restricted from being excessively deformed when the lateral bridging wall 60 is elastically deformed in the expanding direction. Further, since the finger hook pieces 66 are positioned in the vicinity of the clip claws 70, the pushing force and the pulling force applied to the finger hook pieces 66 can be effectively transmitted to the clip claws 70, and the protective cover 51 can be attached to and detached from the skin treatment head 2 with a good click feeling.

As shown in fig. 10, a clip claw 70 having a partially arc shape that is elastically deformable in the left-right direction is integrally provided at the inner lower portion of the clip piece 64, and the clip claw 70 is press-fitted to the neck portion 22 of the head case 13, whereby the protective cover 51 attached to the skin treatment head 2 can be held without being removed. The clip claw 70 in this state is in close contact with the lower half circumferential surface of the neck portion 22 having a circular cross section, and draws down the protective cover 51 by its own elastic deformation force. When the protective cover 51 is attached to the skin treatment head 2, the cover 11 for sandwiching the cotton pad can be attached without any problem even in a state where the cover is attached to the cover attachment portion 23. As shown in fig. 7 and 9, since the inner surface of the front support wall 55 faces the skin electrode 24 and the head case 13 with a sufficient gap therebetween, the protective cover 51 does not cushion the cover 11 even after the attachment of the protective cover 51. Therefore, the cover 11 does not need to be detached from the skin electrode 24 when not in use, and is stored separately from the main body case 1, and dropping or loss of the cover 11 at a place can be reliably eliminated. Since the gap between the front cover wall 54 and the skin electrode 24 is smaller than the front-rear thickness of the cover 11 (see fig. 7), the cover 11 may not fall out of the protective cover 51 even if it falls off from the cover attachment portion 23.

The restricting portion 65 includes a base wall 71 projecting from the inner surface of the valley portion 62 of the upper bridging wall 61, and four restricting ribs 72 projecting from the front surface of the base wall 71. As shown in fig. 7 and 10, in a state where the protective cover 51 is attached to the skin treatment head 2, the base wall 71 and the restricting rib 72 abut against the upper peripheral surface of the neck portion 22 to restrict downward movement. Further, the base wall 71 and the restricting rib 72 are caught by the front wall of the front case 1a facing the neck portion 22 and the protruding base end of the cap mounting portion 23, and restrict the forward and backward movement. That is, in a state where the clip piece 64 is engaged and attached to the neck portion 22, the regulating portion 65 is engaged and held by the head case 13 and the main body case 1 so as to be immovable forward and backward, and the front cover wall 54 of the front protection portion 52 faces the skin electrode 24 with a small gap therebetween. This prevents the front cover wall 54 and the skin electrode 24 from rubbing against each other, and reliably prevents the skin electrode 24 from being damaged. Similarly, since the rear cover wall 58 faces the thermal head 4 with a small gap therebetween, damage to the thermal head 4 can be reliably prevented.

The finger tabs 66 limit the concentration of excessive deformation stress in the valleys 62 when the clip claws 70 engage or disengage with the neck 22. Further, since the finger hook pieces 66 are provided in the vicinity of the clip claws 70, the pushing force and the pulling force applied to the finger hook pieces 66 can be effectively transmitted to the clip claws 70, and the protective cover 51 can be attached to and detached from the skin treatment head 2 with a good click feeling. When the regulating portion 65 is formed on the inner surface of the upper bridging wall 61, the front protective portion 62 and the rear protective portion 65 can be positioned by the regulating portion 65 in a state where the protective cover 51 is attached to the skin treatment head 2. Further, the rear guard 53 can be supported by the left and right lateral bridging walls 60 and the upper bridging wall, and the structural strength of the rear guard 53 can be enhanced. In addition, in a state where the clip piece 64 is press-fitted and engaged with the neck portion 22, the restriction portion 65 is brought into close contact with the neck portion 22 by the elasticity of the clip piece 64 and the lateral bridging wall 60, and the protective cover 51 can be prevented from rattling. Further, the protective function of the protective cover 51 attached to the skin treatment head 2 can be enhanced, and the structural strength can be enhanced by optimizing the protective structure of the protective cover 51.

As shown in fig. 11, the beauty appliance may be placed on a placement surface F such as a table or a dressing table in a lying posture. In this case, in order to place the beauty appliance in a stable state, rib-shaped placement pieces 73 are provided projecting to the left and right on the rear surface of the lower half portion of the rear cover wall 58. When the beauty appliance is placed on the placement surface F, the upper end of the placement piece 73 and the clip end near the lower end of the clip electrode 14 of the main body case 1 abut against the placement surface F, and the main body case 1 in the lying state can be supported in a stable state.

The beauty appliance switches between the first to fourth modes each time the mode button 7 is pressed after the power button 6 is turned on, and controls the operation state of each device according to each operation mode. In addition, a weak pulse current is output to the clip electrode 14 and the skin electrode 24 or the polarity thereof is switched as necessary. When the beauty appliance is used, the cotton pad M impregnated with a beauty solution such as a cosmetic water as needed is placed on the outer surface of the skin electrode 24, and is used in a state where the periphery thereof is fixed by the cover 11 press-fitted to the cover attachment portion 23.

In the first operation mode, the cotton pad M impregnated with the cosmetic liquid is attached to the skin electrode 24, and ion extraction treatment is performed to remove fine dirt penetrating into wrinkles, folds, pores, and the like of the facial skin. At this time, the heater 17 is driven to heat the skin electrode 24, and a pulse current of positive polarity is supplied to the skin electrode 24. When a predetermined time has elapsed after the first operation mode is started, the supply of the pulse current is stopped, and the first operation mode is ended. In the second operation mode, the cotton pad M impregnated with the lotion is attached to the skin electrode 24 and the iontophoresis treatment is performed, as in the first operation mode. At this time, the heater 17 is driven to heat the skin electrode 24, and a pulse current of negative polarity is supplied to the skin electrode 24. When the second operation mode is started and a predetermined time elapses, the supply of the pulse current is stopped, and the second operation mode is ended. In the second operation mode, a cosmetic liquid such as a gel-like cosmetic liquid or lotion having a high viscosity may be applied to the warm head 3 without using the cotton pad M impregnated with the cosmetic liquid.

In the third operation mode, the cotton pad M impregnated with the lotion is attached to the skin electrode 24, and the skin electrode is supplied with the pulse current of the positive polarity and the pulse current of the negative polarity alternately to perform the cosmetic treatment. In addition, the cosmetic treatment is performed in a state where the facial skin is covered with a mask or in a state where the lotion is applied to the facial skin. When a predetermined time has elapsed after the third operation mode is started, the supply of the pulse current is stopped, and the third operation mode is ended. In the fourth operation mode, the cosmetic treatment is performed in a state where the thermal head 4 is cooled by the peltier element 18. Specifically, as in the case of using the cosmetic puff, the hot and cold head 4 is repeatedly brought into contact with or separated from the facial skin from the center of the facial skin toward the periphery thereof to tighten the facial skin. When a predetermined time has elapsed after the start of the fourth operation, the supply of the drive current to the peltier element 18 is stopped, and the fourth operation mode is ended.

As described above, according to the protective cover 51 including the front protective portion 52, the pair of clip pieces 64, and the regulating portion 65, the regulating portion 65 can be engaged and held immovably in the front-rear direction by the head housing 13 and the main body housing 1 in a state where the clip pieces 64 are engaged and attached to the neck portion 22.

According to the configuration in which the front and

rear protection portions

52 and 53 are connected by the pair of elastically deformable strip-shaped lateral bridging walls 60 and the protection cover 51 of the clip piece 64 is provided on the inner surface thereof, when the clip piece 64 is engaged with the neck portion 22 while being elastically deformed, the lateral bridging walls 60 are elastically deformed, and the engagement load is prevented from being concentrated on the clip piece 64, so that the fatigue damage can be eliminated in advance. In addition, in a state where the clip piece 64 is press-fitted and engaged with the neck portion 22, the restriction portion 65 is brought into close contact with the neck portion 22 by the elasticity of the clip piece 64 and the lateral bridging wall 60, and the protective cover 51 can be prevented from rattling.

Fig. 12 and 13 show a battery case 26 according to a second embodiment. Here, a plurality of reinforcing ribs 76 bridging the pair of holding

walls

29L, 29R are provided on the outer opening side of the escape portion 32, so that the holding

walls

29L, 29R are reinforced, and the structural strength of the battery case 26 is enhanced. In a state where the battery unit 27 is loaded in the battery housing portion 28, as shown in fig. 12, the peripheral surface of the battery unit 27 entering the escape space S is caught by the reinforcing rib 76, and therefore, the battery unit 27 can be positioned at an appropriate position. The rest is the same as the battery case 26 of the first embodiment, and therefore, the same components are denoted by the same reference numerals and their descriptions are omitted.

Fig. 14 shows a battery case 26 according to a third embodiment. Here, the battery case 26 is formed integrally with the front case 1a, and the space occupied by the battery case 26 and the battery 27 in the main body case 1 can be further reduced. Specifically, the holding

walls

29L and 29R and the holding

claws

33 and 34 are formed integrally with the front case 1 a. A recess is formed in the inner surface of the front case 1a, and the recess functions as a relief portion 32. The battery 27 of this embodiment is composed of a battery main body 42 and a shrink film 44 covering the peripheral surface thereof. The rear case 1b is detachably assembled to the front case 1a and also serves as a battery cover, and an elastic body 46 is fixed to the inner surface thereof. Thus, the escape portion 32 may be formed of a concave portion, and is not necessarily formed of a through hole.

In the first embodiment, the thermal head 4 is provided on the back surface of the skin treatment head 2, but the thermal head 4 may be omitted. In this case, the rear protection portion 53 may be formed in a shape along the upper outer surface of the main body case 1 with the rear support wall 57 and the rear cover wall 58. Alternatively, the rear protector 53 may be omitted, and the protective cover 51 may be configured by the front protector 52, the clip piece 64, the regulating portion 65, and the finger hook piece 66. The battery 27 need not be a rechargeable battery, but may be a primary battery.

The fastening base 37 of the battery case 26 may be fastened and fixed by a fusion pin provided in the front case 1a or may be fastened and fixed by a blind rivet, in addition to the fastening by the screw 3. The loading piece 73 may be provided in front of the front guard 52 if necessary. A resilient tab 35 may be provided on the underside of the retaining end wall 30. In the first embodiment, the cover 11 is engaged with and attached to the cover attachment portion 23 of the head case 13, but the cover 11 can be directly engaged with and attached to the skin electrode 24. Even if the cover 11 cannot be merely engaged with and attached to the skin electrode 24, the cotton pad M and the cover 11 may be fixed to the skin electrode by placing the cotton pad M on the skin electrode 24 and press-fitting the cotton pad M into the attachment cover 11. Further, by attaching the protective cover 51 to the skin treatment head 2, the cover 11 covering only the skin electrode can be held without being pulled out. In claim 10, "the cover 11 is detachable from the skin electrode 24" means that the cover 11 may be in any of the above-described states.

Claims

1. A small-sized electric appliance characterized in that,

a battery case (26) having a battery housing section (28) is provided in the main body case (1),

the battery case (26) is provided with holding walls (29L, 29R) for receiving the peripheral surface of the battery (27) and a loading port (31) for loading the battery (27),

a relief portion (32) for receiving a part of the peripheral surface of the battery (27) loaded in the battery housing portion (28) is formed on the holding walls (29L, 29R) facing the loading port (31),

holding claws (33, 34) for pressing and holding the peripheral surface of the battery (27) exposed to the loading opening (31) and restricting the battery (27) from being pulled out are provided at opposite side portions of the loading opening (31),

the length (H1) of the holding claws (34) provided on one side section protruding from the loading port (31) is set to be greater than the length (H2) of the holding claws (33) provided on the other side section protruding from the loading port (31).

2. Small electric device according to claim 1,

the escape part (32) is formed by a through hole.

3. Small electric device according to claim 1 or 2,

a part of the peripheral surface of the battery (27) loaded in the battery housing section (28) enters the escape space (S) of the escape section (32) from the inner surface of the holding walls (29L, 29R).

4. Small electric device according to claim 3,

the amount (T2) of entering the battery (27) in the escape space (S) is set to be more than half of the thickness (T1) of the escape space (S).

5. Small electric device according to claim 1 or 2,

a pair of holding end walls (30) are provided continuously to both ends in the longitudinal direction of the holding walls (29L, 29R),

an elastic piece (35) for pressing the battery (27) loaded in the battery housing section (28) against the opposite holding end wall (30) is provided on either one of the holding end walls (30).

6. Small electric device according to claim 5,

the battery case (26) is formed in a rectangular case shape by a pair of holding walls (29L, 29R) and a pair of holding end walls (30),

fastening seats (37) formed to protrude toward both outer ends of the holding walls (29L, 29R) are fixed to the main body case (1) by fastening members (39).

7. Small electric device according to claim 1 or 2,

an elastic body (46) that is in close contact with the peripheral surface of the battery (27) is provided on the inner surface of the main body case (1) that faces the loading opening (31) of the battery housing section (28).

8. Small electric device according to claim 2,

a plurality of reinforcing ribs (76) bridging the pair of holding walls (29L, 29R) are formed on the outer opening side of the escape part (32),

the peripheral surface of the battery (27) entering the escape space (S) of the escape part (32) is caught by the reinforcing rib (76).