JPH11197374A - Hair cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a higher safety by enabling use only when an attachment is mounted to trim hair in a cutting shape while using a blade with an enhanced cutting performance. SOLUTION: This hair cutter is provided with a blade block 50 equipped with a mobile blade 5, a body 1 having a motor 51 and a drive means of the blade block 50 built in and an attachment 8 which keeps skin separated from the cutting position in the blade block 50 at an interval while making the blade block 50 free to load thereon or unload therefrom, In this case, a drive interlocking means 52 is provided to allow driving of the mobile blade 5 of the blade block 50 by mounting the attachment 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cutter having a movable blade, and more particularly to a technique for improving safety.

[0002]

2. Description of the Related Art Conventionally, a hair cutter having a movable blade is used, for example, by attaching an attachment having a plurality of teeth in a comb-like shape having a plurality of teeth to a blade block, or by removing the attachment. The hair cutter is used alone.

[0003]

When the attachment is detached and used, for example, in a blade block in which a movable blade slides on a comb-like fixed blade, the fixed blade and the movable blade may directly touch the skin. The pitch between the comb blades of the fixed blades is mainly reduced so as not to cut the skin and the like, and safety is taken into consideration so that the skin does not enter between the comb blades and cut the skin. On the other hand, since the interval between the comb blades becomes narrow, the introduction of hair is reduced, and the sharpness is suppressed.

[0004] The present invention is intended to solve such a problem, and enables use only when an attachment for adjusting the cut shape of the hair is attached while using a blade with enhanced sharpness. It is an object to provide a hair cutter capable of sufficiently enhancing safety.

[0005]

According to the first aspect, a blade block 50 having a movable blade 5, a main body 1 containing a motor 51 and a driving means for the blade block 50, and a cutting position in the blade block 50 are provided. A drive interlocking means which comprises an attachment 8 which keeps an interval with the skin and which is detachable from the blade block 50, and which enables the movable blade 5 of the blade block 50 to be driven by attaching the attachment 8. 52 is provided.

According to a second aspect of the present invention, the connecting portion 53 of the movable blade 5 is urged away from the drive shaft 16 of the main body 1 when the attachment 8 is not mounted. According to a third aspect of the present invention, a lock piece 57 for locking the operation of the switch knob 14 on the main body 1 side is released by mounting the attachment 8.

According to a fourth aspect of the present invention, the locking means 55 is provided releasably between the holding means 54 for holding the blade block 50 and the locking means 55 with the attachment 8.
Is released and the blade block 50 is locked to the holding portion 54. According to a fifth aspect of the present invention, the blade block 50 is mounted on the main body 1 with the blade block 50 held by the attachment 8, so that the blade block 50 can be driven.

According to a sixth aspect of the present invention, the blade block 50 is provided integrally with the attachment 8. According to a seventh aspect of the present invention, an electric drive circuit of the main body 1 is formed by attaching the attachment 8 to the main body 1.

[0010] According to an eighth aspect of the present invention, a part of the electric circuit is provided on the attachment 8 side. According to a ninth aspect, an electric circuit is formed by activating the protection switch 56 when the attachment 8 is mounted. In the tenth aspect, a lock piece 86 for controlling the opening and closing of the contact of the switch S on the main body 1 side is provided, and the lock piece 86 is released with the attachment of the attachment 8, and the contact of the switch S on the main body 1 side is released. It is characterized in that it can be opened and closed.

(Action) In the first aspect, unless the attachment 8 is used, the movable blade 5 of the blade block 50 cannot be driven, and the safety when the sharpness of the movable blade 5 of the blade block 50 is enhanced is improved. It can be sufficiently secured. According to the second aspect, when the attachment 8 is not mounted, the connecting portion 53 of the movable blade 5 is separated from the drive shaft 16 of the main body 1. If the attachment 8 is not mounted, the drive shaft 16 of the main body 1 is driven. However, the movable blade 5 is not driven, and is safe.

According to the third aspect, the switch knob 14 of the main body 1 cannot be operated unless the attachment 8 is attached, which is safe. According to the fourth aspect, the attachment 8 is attached, the locking means 55 is released, and the blade block 50 is held by the holding portion 54. If the attachment 8 is not attached, the blade block 50 is held in a predetermined posture. And the blade block 50 cannot be operated, which is safe.

In the fifth aspect, unless the blade block 50 is held by the attachment 8 and attached to the main body 1,
The blade block 50 cannot be driven and is safe.
In the sixth aspect, the blade block 50 side cannot be used alone, and is safe. In claims 7 to 9, a drive circuit is not formed unless the attachment 8 is attached, and the blade block 50 cannot be driven, which is safe.

In the tenth aspect, the attachment 8
As long as the switch S is not mounted, the switch S on the main body 1 cannot be turned on even if the switch handle 19 on the main body 1 is operated, which is safe.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 is a partial cross-sectional view in which an attachment 8 is mounted, and FIG. 2 is a partial cross-sectional view before the attachment 8 is mounted. FIG. 5 is an overall front view. 10 and 11 are exploded perspective views of the main body. FIG. 12 is an exploded perspective view of the blade block.

In the present embodiment, the main body 1 is composed of an upper case 10 and a lower case 11, and an eccentric cam 15 in which a drive shaft 16 eccentric to a motor 51 serving as a driving source is press-fitted and fixed therein. And upper and lower cases 10, 1
Inside the motor 1, a circuit section 18 having a storage battery 59 is provided at the rear of the motor 51. A switch cover 20 is fixed to the upper case 10, and a switch handle 19 is slidably disposed on the surface of the switch cover 20. The rib 19a of the switch handle 19 engages with the square hole 17a of the connecting plate 17 sliding on the upper surface of the motor 51,
The operation is linked with the operation of the switch handle 19. The foot 17b of the connecting plate 17 is engaged with the concave portion 14a of the switch knob 14, so that the switch knob 14 also interlocks with the switch handle 19. Switch knob 1
A click piece 14b is formed in a series at the lower part of 4, and the click piece 14b is engaged with and disengaged from the click peak 11a of the lower case 11, and gives a click feeling when the switch handle 19 is operated. A contact cover 6 is provided beside the click piece 14b.
A contact base 60 provided with a contact and a switch contact fitting 31 are fixed to each other to form a switch S. The switch contact fitting 31 opens and closes the power supply of the circuit unit 18 and controls the driving of the motor 51. I am trying to do it.

The holding portions 24 on both sides of the distal end of the lower case 11
, The detachable button 12 is urged outward by a coil spring 13 and held, and the upper case 10 and the lower case 11 are fixed by screws 62. Next, the blade head 3 having the blade block 50 detachably provided will be described. As shown in FIG. 12, the blade head 3 includes an upper head 25 and a lower head 26.
The blade stopper spring 32 for holding the blade block 50 is held between the upper head 25 and the lower head 26. The upper head 25 and the lower head 26 are fixed by screws 33 and constitute a holding portion 54 for holding the blade block 50. The blade block 50 includes a base 27, a fixed blade 4, a movable blade 5, and a pressing spring 2.
8 and so on.

As shown in FIG. 3, a protrusion 63 is formed on the base 27 of the blade block 50, a recess 64 is formed on the upper head 25, and a substantially triangular shape is formed on the base 27. And a projection 65 for locking and locking of the lock. Protrusion 65
A locking projection 66 is formed at the tip of the. When the protrusion 63 of the base 27 is engaged with the recess 64 of the upper head 25 as shown in FIG. 3, the tip of the triangular protrusion 65 on the base 2 is fixed with a blade stopper spring. The blade block 50 can be temporarily held in an inclined posture while being urged in the direction away from the blade block spring 58 by engaging the locking projection 66 with the blade stopper spring 58 while engaging with the blade 58. I have to.

As shown in FIGS. 6 and 7, the attachment 8 is formed by integrally forming a plurality of comb teeth 67 of different heights on a substantially rectangular cylindrical base 68. Locking legs 69, 69 are suspended, and ribs 70 are formed on the inner surface. As shown in FIG. 2, the inner dimension Z between the ribs 70 is greater than the minimum distance W between the blade block 50 and the upper end of the lower head 26. Further, the inner dimension Y between the shorter diameter side of the base 68 and the locking legs 69, 69 is larger than the outer dimension X of the temporarily held blade block 50 and the lower head 26. Further, the inner shape of the base portion 68 is such that the holding portion 5 constituted by the blade block 50 and the upper and lower heads 25 and 26 is formed.
It matches the outer shape on the four sides.

When the attachment 8 is mounted from above while the blade block 50 is temporarily held as shown in FIG. 2, the blade block 50 is tilted toward the holding portion 54 and the blade stopper spring 58 is used. The triangular protrusion 65 can be pressed and held. In this case, the locking leg 69 on the attachment 8 side is engaged with the holes 71, 71 of the upper and lower heads 25, 26, which are the holding portions 54, and is prevented from being pulled out by the hook 72 on the outer surface of the locking leg 69.

On the base 27 of the blade block 50, a connecting portion 53 for receiving a driving force is formed in a groove shape. Thus, when the blade block 50 is tilted and held to the holding portion 54 side, the drive shaft 16 of the main body 1 is fitted to the connecting portion 53,
The movable blade 5 is driven via the drive shaft 16 by the rotation of the motor 51.
Can be reciprocated with respect to the fixed blade 4. The drive interlocking means 5 is configured such that the connection portion 53 on the blade block 50 side is connected to and interlocked with the drive shaft 16 on the body 1 side.
2 collectively.

As described above, by providing the drive interlocking means 52 which enables the movable blade 5 of the blade block 50 to be driven by attaching the attachment 8 to the blade block 50 and the holding portion 54, as long as the attachment 8 is not used. The movable blade 5 of the blade block 50 cannot be driven, and the safety when the sharpness of the movable blade 5 of the blade block 50 is enhanced is sufficiently ensured.

When the attachment 8 is not mounted, the connecting portion 53 of the movable blade 5 is urged away from the drive shaft 16 of the main body 1 by the blade stopper spring 58, and the attachment 8 is not mounted. In this state, the connecting portion 53 of the movable blade 5 is separated from the drive shaft 16 on the main body 1 side. Therefore, if the attachment 8 is not mounted, the movable blade 5 is not driven even if the drive shaft 16 on the main body 1 side is driven. Is safe.

[Second Embodiment] FIGS. 13 to 15 show a second embodiment. FIG. 13 is a partial sectional view, FIG. 14 is a sectional view of the attachment 8, and FIG. 15 is an exploded perspective view. However, the basic configuration of this embodiment is the same as that of the first embodiment.
The same reference numerals are given to common parts, and description thereof will be omitted.

As shown in FIG. 14, a conductive portion 72 is provided on the locking leg 69 of the attachment 8, and the contact plate 7 is provided on the main body 1 side.
4 and 74 are provided, and the conductive portion 72 on the attachment 8 side is brought into electrical contact with the contact plates 74 and 74 on the main body 1 side.
An electric circuit including the circuit section 18 can be formed. In the present embodiment, when the attachment 8 is not attached, the switch handle 19 on the main body 1 side is used.
And the switch S is turned on to drive the motor 51, which is safe.

Third Embodiment FIGS. 16 to 18 show a third embodiment. FIG. 16 (a) is a partial sectional view, and FIG. 16 (b) is a portion when the protection switch 56 is turned on. 17 is a perspective view, and FIG. 18 is an exploded perspective view.
However, the basic configuration of the present embodiment is the same as that of the above-described first embodiment, and the common portions are denoted by the same reference numerals and description thereof is omitted.

In the present embodiment, the protection switch 56 is provided on the main body 1 side, and the protection switch 56 is operated with the attachment 8 to form an electric circuit. Specifically, the circuit unit 18 on the main body 1 side
Contact plates 74, 74 are connected to lead wires 73, 73
A handle 75 having a contact spring 76 is provided by being urged upward by a coil spring 77, and the handle 75 is depressed by a locking leg 69 of the attachment 8, whereby the contact spring 76 is moved between the contact plates 74, 74. To form an electric circuit including the circuit section 18 on the main body 1 side.

In the present embodiment, if the attachment 8 is not attached, the motor 51 cannot be driven even when the switch is turned on by operating the switch handle 19 of the main body 1, thereby ensuring safety. Fourth Embodiment FIGS. 19 to 21 show a fourth embodiment, and FIG. 19 is a partial sectional view showing a state in which a lock piece 57 is unlocked from a switch knob 14, and FIGS.
FIG. 21 is a sectional view showing a state in which the switch knob 14 is locked by the lock piece 57, and FIG. 21 is a perspective view of the lock piece 57. However, the basic configuration of the present embodiment is the same as that of the above-described first embodiment, and the common portions are denoted by the same reference numerals and description thereof is omitted.

In the present embodiment, the lock piece 57 is released when the attachment 8 is mounted, and the switch knob 14 on the main body 1 can be operated. Specifically, a moving body 78 having a lock piece 57 and an insertion hole 80 is provided in the middle of the moving path of the switch knob 14 on the main body 1 side so as to be movable in the transverse direction of the switch knob 14 and moves with the main body 1. A pull spring 79 is provided between the body 78 and the switch knob 14, and a lock recess 81 is formed in the switch knob 14.

The pressing surface 8 of the moving body 78 is held by one of the locking legs 69 of the attachment 8 mounted on the main body 1 side.
2 to move the moving body 78, the lock piece 57 comes out of the recess 81, and the switch knob 14 can be operated. In the present embodiment, if the attachment 8 is not attached, the switch knob 1
4 is inoperable and safe.

Fifth Embodiment FIGS. 22 to 24 show a fifth embodiment, FIG. 22 is a partial sectional view after the attachment 8 is mounted, FIG. 23 is a partial sectional view before the attachment 8 is mounted, FIG. 24 is a perspective view of a lock piece 83 constituting the lock unit 55. However, the basic configuration of the present embodiment is the same as that of the above-described first embodiment, and the common portions are denoted by the same reference numerals and description thereof is omitted.

In the present embodiment, the blade block 50
The lock means 55 is provided releasably between the holding section 54 and the holding section 54 for holding the blade block 50 on the holding section 54 by releasing the locking means 55 with the attachment 8. Specifically, the blade block 50
Locking means 55 for preventing the holding portion 54 from holding
The lock piece 83 is provided upright from the main body 1 side, is urged by a coil spring 84 to be retractable from the lock position, and is provided at the other end of the lock piece 83 The hole 71 of the head 25 is closed, and an inclined surface 85 is formed on the lock piece 83.

When the attachment 8 is not mounted, as shown in FIG. 23, the lock piece 83 is located at the lock position, and the rotation of the blade block 50 toward the holding portion 54 is prevented. Then, by attaching the attachment 8, the inclined surface 85 is pressed by the locking leg 69 of the attachment 8, and the lock piece 83 is retracted to the unlocked position against the coil spring 84. The rotation of the 50 toward the holding portion 54 is permitted, and the blade block 50 is held by the holding portion 54 by mounting the attachment 8.

In this embodiment, the attachment 8 is mounted, the locking means 55 is released, and the blade block 50 is released.
Is held by the holding portion 54, and the attachment 8
If the blade block 50 is not mounted, the blade block 50 cannot be held in a predetermined posture, and the blade block 50 cannot be operated, which is safe. [Embodiment 6] Figs. 25 and 26 show a sixth embodiment of the present invention. Fig. 25 is a partial cross-sectional view in which the attachment 8 is mounted, and Fig. 26 is a partial cross-sectional view before the attachment 8 is mounted. However, the basic configuration of the present embodiment is the same as that of the above-described first embodiment, and the common portions are denoted by the same reference numerals and description thereof is omitted.

In the present embodiment, the blade block 50
Is mounted on the main body 1 while holding it on the attachment 8 so that the blade block 50 can be driven. Specifically, the blade block 50 is
So that it does not have the protrusion 63 that locks the blade block 5
0 is matched with the holding portion 54 and held on the attachment 8, and the attachment 8 is mounted on the main body 1 and the blade block 5
The movable blade 5 is driven by connecting the connecting portion 53 of the main body 1 to the drive shaft 16 of the main body 1.

In the present embodiment, the blade block 50
As long as the blade block 50 is not attached to the main body 1 while being held by the attachment 8, the blade block 50 cannot be driven, which is safe. Seventh Embodiment FIGS. 27 to 34 show a seventh embodiment, FIG. 27 is a plan view of the main body side with a part thereof omitted, FIGS. 28 to 33 are cross-sectional views, and FIG. 86 is a front view, and FIG. However, the basic configuration of the present embodiment is the same as that of the above-described first embodiment, and the common portions are denoted by the same reference numerals and description thereof is omitted.

In this embodiment, a lock piece 86 for controlling the opening and closing of the contact point of the switch S on the main body 1 is provided.
The lock piece 86 is released when the attachment 8 is mounted, and the contact of the switch S on the main body 1 can be opened and closed. Specifically, a lock piece 86 is provided between the switch contact fitting 31 on the main body 1 side and the contact base 60 so as to be freely inserted and removed, and is urged by a coil spring 87 so as to protrude. The lock piece 86 is pushed down by the rib 70 against the lock piece 87, and the interposition piece 86 a at the tip of the lock piece 86 is removed from between the switch contact fitting 31 on the main body 1 side and the contact base 60, The switch S can be opened and closed. In this case, the switch knob 1 associated with the operation of the switch handle 19
The movement of 4 can be performed irrespective of the lock piece 86, and unless the attachment 8 is attached, the switch S cannot be closed and the motor 51 cannot be driven.

In the present embodiment, unless the attachment 8 is attached, the switch handle 19 on the main body 1 side is used.
Cannot be operated, and the blade block 50 cannot be driven, which is safe. [Eighth Embodiment] Figs. 35 and 36 show an eighth embodiment. Fig. 35 is a partial sectional view before the attachment 8 is attached, and Fig. 36 is a partial sectional view after the attachment 8 is attached. However, the basic configuration of the present embodiment is the same as that of the above-described first embodiment, and the common portions are denoted by the same reference numerals and description thereof is omitted.

In the present embodiment, the blade block 50
Are provided integrally with the attachment 8. Specifically, the base 2 of the blade block 50 is attached to the attachment 8.
7, the attachment 8 is provided integrally with the blade block 50, and the attachment 8 is attached to the main body 1, so that the connecting portion 53 of the blade block 50 is connected to the drive shaft 1 on the main body 1 side.
6 are connected.

In the present embodiment, the blade block 50
The side cannot be used alone and is safe.

[0040]

According to the first aspect of the present invention, since the drive interlocking means for driving the movable blade of the blade block by mounting the attachment is provided, the movable blade of the blade block is driven unless the attachment is used. Therefore, there is an advantage that safety when the sharpness of the movable blade of the blade block is enhanced can be sufficiently secured.

According to the second aspect, the connecting portion of the movable blade is urged away from the drive shaft on the main body side when the attachment is not mounted. Therefore, when the attachment is not mounted, the movable blade is movable from the drive shaft on the main body side. Since the connecting part of the blade is separated, if the attachment is not attached, even if the drive shaft on the main body side is driven, the movable blade will not be driven,
It is safe.

According to the third aspect of the present invention, since the lock piece for locking the operation of the switch knob on the main body side is released by mounting the attachment, the switch knob on the main body side can be operated unless the attachment is mounted. No, it is safe. In claim 4, the lock means is provided releasably between the holder and the holder for holding the blade block, and the lock is released with the attachment of the attachment to lock the blade block to the holder. Since the lock means with the attachment attached is released and the blade block is held by the holder, the blade block cannot be held in a predetermined posture unless the attachment is attached, and the blade block can be operated. Is safe.

According to the fifth aspect, the blade block is mounted on the main body with the blade block held in the attachment, so that the blade block can be driven. Therefore, the blade block is held on the attachment and mounted on the main body. Otherwise, the blade block cannot be driven and is safe.
In the sixth aspect, since the blade block is provided integrally with the attachment, the blade block side cannot be used alone, which is safe.

According to the seventh aspect, since the electric drive circuit on the main body side is formed by attaching the attachment to the main body, the drive circuit is not formed and the blade is not formed unless the attachment is mounted. The block cannot be driven and is safe. In claim 8, since a part of the electric circuit is provided on the attachment side, a drive circuit is not formed unless the attachment is attached, and the blade block cannot be driven, which is safe.

According to the ninth aspect, since the protection switch is operated in accordance with the mounting of the attachment to form an electric circuit, a driving circuit is not formed unless the attachment is mounted, and the blade block cannot be driven. Is safe. According to the tenth aspect, since the lock piece is released along with the attachment and the switch handle on the main body can be operated, the switch handle on the main body is operated unless the attachment is mounted. Can not turn on the switch on the body side,
It is safe.

[Brief description of the drawings]

FIG. 1 shows Embodiment 1 of the present invention and is a partial cross-sectional view in which an attachment is mounted.

FIG. 2 is a partial cross-sectional view before attachment of the attachment.

FIG. 3 is a partial cross-sectional view showing a state where the blade block is locked by a blade stopper spring when the blade block is opened.

FIG. 4 is a partial cross-sectional view showing a state in which the blade block is locked by a blade stopper spring in a state where the blade block is closed.

FIG. 5 is an overall front view.

FIG. 6 is an exploded side view.

FIG. 7 is an exploded front view.

FIG. 8 is a partial sectional view showing a blade block and its vicinity.

FIG. 9 is an exploded sectional view of the main body.

FIG. 10 is an exploded perspective view of the main body.

FIG. 11 is an exploded perspective view of the main body.

FIG. 12 is an exploded perspective view of a blade block.

FIG. 13 shows the second embodiment and is a partial cross-sectional view in which an attachment is mounted.

FIG. 14 is a sectional view of an attachment.

FIG. 15 is an exploded perspective view of the same.

FIGS. 16A and 16B show the third embodiment, in which FIG.
FIG. 2B is a partial sectional view when the protection switch is turned on.

FIG. 17 is a perspective view of the same.

FIG. 18 is an exploded perspective view of the same.

FIG. 19 shows the fourth embodiment and is a partial cross-sectional view showing a state where the lock piece is unlocked from the switch handle.

FIG. 20 is a cross-sectional view showing a state where the switch knob is locked by a lock piece.

FIG. 21 is a perspective view of a lock piece.

FIG. 22 shows the fifth embodiment and is a partial cross-sectional view after the attachment is mounted.

FIG. 23 is a partial cross-sectional view before attaching an attachment.

FIG. 24 is a perspective view of a lock piece.

FIG. 25 shows the sixth embodiment and is a partial cross-sectional view in which an attachment is mounted.

FIG. 26 is a partial cross-sectional view before attaching an attachment.

FIG. 27 is a plan view showing the seventh embodiment, with a part of the main body side omitted.

FIG. 28 is a side sectional view of the switch in an off state.

FIG. 29 is an enlarged sectional view of the same.

FIG. 30 is a cross-sectional view of a state where an attachment is removed when a switch is turned on.

FIG. 31 is an enlarged sectional view of the same.

FIG. 32 is a cross-sectional view showing a state in which the attachment is mounted with the switch turned on.

FIG. 33 is an enlarged sectional view of the above.

34 (a) is a front view of a lock piece, and FIG. 34 (b) is a side view.

FIG. 35 shows the eighth embodiment and is a partial cross-sectional view before attaching an attachment.

FIG. 36 is a partial cross-sectional view after attaching an attachment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 4 Fixed blade 5 Movable blade 8 Attachment 50 Blade block 51 Motor 52 Drive interlocking means 53 Connecting part 54 Holding part 55 Lock means 56 Protection switch 57 Lock piece

Claims (10)

[Claims] 1. A blade block having a movable blade, a main body containing a motor and a driving means for the blade block, and an attachment which is detachable from the blade block while maintaining an interval between a cutting position and the skin of the blade block. A hair cutter, comprising: a driving interlocking means for driving a movable blade of a blade block by mounting an attachment. 2. The hair cutter according to claim 1, wherein the connecting portion of the movable blade is urged away from the drive shaft of the main body when the attachment is not mounted. 3. The hair cutter according to claim 1, wherein a lock piece for locking the operation of the switch knob on the main body side is released by mounting the attachment. 4. A structure in which a locking means is releasably provided between a holding part for holding the blade block and the locking means is released with the attachment of the attachment to lock the blade block to the holding part. The hair cutter according to claim 1, characterized in that: 5. The hair cutter according to claim 1, wherein the hair cutter is configured to be able to be driven to the blade block by being mounted on the main body while holding the blade block in the attachment. 6. The hair cutter according to claim 1, wherein the blade block is provided integrally with the attachment. 7. The hair cutter according to claim 1, wherein an electric drive circuit on the main body side is formed by attaching the attachment to the main body. 8. The hair cutter according to claim 7, wherein a part of the electric circuit is provided on the attachment side. 9. The hair cutter according to claim 7, wherein an electric circuit is formed by activating a protection switch in accordance with attachment of the attachment. 10. A lock member for controlling opening and closing of a contact of a switch of a main body is provided, and the lock member is released with attachment of an attachment to enable opening and closing of a contact of a switch of the main body. The hair cutter according to claim 7, characterized in that: