Hair removal device blades and hair removal devices with hair removal devices.

Abstract

This disclosure provides a blade for a depilatory device and a depilatory device incorporating the blade. The blade of the depilatory device includes a fixed blade having fixed blade teeth and a fixed blade groove, and a movable blade having movable blade teeth and a movable blade groove. The movable blade teeth are formed such that the tooth width in the reciprocating sliding direction is larger than the groove width in the reciprocating sliding direction of the fixed blade groove. The tooth width in the reciprocating sliding direction of the fixed blade is larger than the groove width in the reciprocating sliding direction of the movable blade groove. The blade groove angle at least on the opening side of each of the fixed blade groove and the movable blade groove is a positive angle with the intersection point located on the bottom side. Thus, a blade for a depilatory device capable of suppressing deformation is provided.

Description

Technical Field

[0001] This disclosure relates to a blade for a hair removal device and a hair removal device having a blade for a hair removal device. Background Technology

[0002] Previously, as disclosed in Japanese Patent Application Publication No. 2016-067648, a type of trimmer (hair removal device) blade was proposed that cuts hair by reciprocating a comb-shaped movable blade with movable blade teeth and movable blade groove relative to a comb-shaped fixed blade with fixed blade teeth and fixed blade groove.

[0003] In Japanese Patent Application Publication No. 2016-067648, when a movable cutting edge tooth is located on a fixed cutting edge groove formed between two adjacent fixed cutting edge teeth, a movable cutting edge tooth adjacent to a movable cutting edge tooth contacts a fixed cutting edge tooth or another fixed cutting edge tooth. With this arrangement, the movable and fixed cutting edge teeth in contact with each other bear the force applied to the movable or fixed cutting edge tooth when one of the movable cutting edge teeth is located on the fixed cutting edge groove, thus suppressing deformation of the movable or fixed cutting edge tooth. Summary of the Invention

[0004] While conventional techniques have been able to suppress blade deformation in trimmers (hair removal devices) in this way, it is preferable to suppress blade deformation in trimmers (hair removal devices) more reliably.

[0005] Therefore, the purpose of this disclosure is to obtain a blade of a hair removal device that can more reliably suppress deformation, and a hair removal device having a blade of a hair removal device.

[0006] The hair removal device of this disclosure includes a fixed blade and a movable blade that reciprocates relative to the fixed blade, and the fixed blade and the movable blade cut hair. Furthermore, the fixed blade has a plurality of fixed blade teeth and a plurality of fixed blade grooves arranged in the reciprocating sliding direction relative to the fixed blade. The movable blade also has a plurality of movable blade teeth and a plurality of movable blade grooves arranged in the reciprocating sliding direction. Moreover, the movable blade teeth are formed such that the tooth width in the reciprocating sliding direction is larger than the groove width in the reciprocating sliding direction of the fixed blade grooves, and the tooth width in the reciprocating sliding direction of the fixed blade teeth is larger than the groove width in the reciprocating sliding direction of the movable blade grooves. Furthermore, the fixed blade grooves and the movable blade grooves are formed such that at least the blade groove angle on the opening side is a positive angle with the intersection point located on the bottom side.

[0007] Another technical solution of this disclosure discloses a hair removal device with blades including a fixed blade and a movable blade that reciprocates relative to the fixed blade, which cuts hair. Furthermore, the fixed blade has a plurality of fixed blade teeth and a plurality of fixed blade grooves arranged in the reciprocating sliding direction relative to the fixed blade. Similarly, the movable blade has a plurality of movable blade teeth and a plurality of movable blade grooves arranged in the reciprocating sliding direction. The fixed blade teeth include a fixed-side hair-cutting region capable of cutting hair, and the movable blade teeth include a movable-side hair-cutting region capable of cutting hair. Moreover, when viewed along the direction where the fixed blade and movable blade coincide, when the center of the reciprocating sliding direction of the movable blade teeth coincides with the center of the reciprocating sliding direction of the fixed blade grooves, the edges on both sides of the movable-side hair-cutting region in the reciprocating sliding direction coincide with the fixed-side hair-cutting region. Furthermore, when viewed along the direction in which the fixed blade and the movable blade coincide, when the center of the reciprocating sliding direction of the fixed blade teeth coincides with the center of the reciprocating sliding direction of the movable blade groove, the edges on both sides of the reciprocating sliding direction of the fixed side hair cutting area coincide with the movable side hair cutting area.

[0008] One of the hair removal devices disclosed herein includes the blades of the aforementioned hair removal device.

[0009] According to this disclosure, it is possible to obtain a blade for a hair removal device that can more reliably suppress deformation, and a hair removal device having such a blade. Attached Figure Description

[0010] Figure 1 This is a side view of the trimmer as shown in the embodiment.

[0011] Figure 2 This is a side view showing the trimmer in the embodiment with its cover removed.

[0012] Figure 3 This is a perspective view of the blade unit in the embodiment.

[0013] Figure 4 This is a perspective view showing the blade unit of the embodiment in an exploded view.

[0014] Figure 5 This is a perspective view of the fixed and movable pieces of the embodiment, viewed from the movable piece side.

[0015] Figure 6 This is a perspective view of the fixed plate and movable plate of the embodiment, viewed from the fixed plate side.

[0016] Figure 7This is a diagram of the fixed plate and the movable plate when viewed from the movable plate side along the direction in which the fixed blade and the movable blade overlap, and the center of the reciprocating sliding direction of the movable blade tooth in the embodiment is aligned with the center of the reciprocating sliding direction of the fixed blade groove.

[0017] Figure 8 This is a diagram of the fixed plate and the movable plate when viewed from the fixed plate side along the direction in which the fixed blade and the movable blade overlap, and the center of the reciprocating sliding direction of the movable blade tooth in the embodiment is aligned with the center of the reciprocating sliding direction of the fixed blade groove.

[0018] Figure 9 This is a diagram of the fixed plate and the movable plate when viewed from the movable plate side along the direction in which the fixed blade and the movable blade overlap, and the center of the reciprocating sliding direction of the fixed blade tooth and the center of the reciprocating sliding direction of the movable blade groove are aligned.

[0019] Figure 10 This is a diagram of the fixed plate and the movable plate when viewed from the fixed plate side along the direction in which the fixed blade and the movable blade overlap, and the center of the reciprocating sliding direction of the fixed blade tooth in the embodiment is aligned with the center of the reciprocating sliding direction of the movable blade groove.

[0020] Figure 11 This is a cross-sectional view showing the fixed blade teeth and the movable blade teeth in the embodiment.

[0021] Figure 12 This is a cross-sectional view showing the fixed blade teeth and the movable blade teeth in a modified example.

[0022] Figure 13 This is a cross-sectional view showing an example of using the trimmer with its fixed blade teeth pressed tightly against the skin.

[0023] Figure 14 This is a cross-sectional view showing an example of using the trimmer with its movable blade teeth pressed tightly against the skin.

[0024] Figure 15 This is a diagram showing the fixed piece and the movable piece in Comparative Example 1.

[0025] Figure 16 This is a diagram showing the fixed piece and the movable piece in Comparative Example 2. Detailed Implementation

[0026] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, sometimes overly detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of substantially the same structures may be omitted.

[0027] Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter of the claims.

[0028] Furthermore, in the following embodiments, a hair removal device is exemplified as a trimmer (electric hair cutting device) for cutting human or animal body hair.

[0029] In this embodiment, the length direction of the holding part of the trimmer is set as the vertical direction Z, the width direction of the holding part of the trimmer is set as the width direction Y, and the direction orthogonal to the vertical direction Z and the width direction Y is set as the front-back direction X.

[0030] Furthermore, in this embodiment, the side of the grip with the head is positioned at the top in the vertical direction, and the side of the grip with the switch is positioned at the front in the front-back direction.

[0031] Furthermore, in this embodiment, the linear reciprocating direction of the movable blade (the reciprocating sliding direction of the movable blade) is set as the blade movement direction W.

[0032] (Implementation Method)

[0033] like Figure 1 As shown, the trimmer (hair removal device) 10 of this embodiment includes a handle 20 that can be held by hand and a head 30 provided with a blade unit 40 and supported on the handle 20. This trimmer 10 is, for example, a device for processing or trimming the body hair of a user (e.g., eyebrows) to a desired length.

[0034] Furthermore, in this embodiment, the trimmer 10 includes a housing 11 made of synthetic resin, which is formed by joining a plurality of segments. Moreover, a cavity is formed inside the housing 11 formed by joining the segments, and various electrical components are housed within this cavity. The plurality of segments can be joined, for example, by using threads or by interlocking the segments with each other.

[0035] In this embodiment, an electric motor (not shown) and a power supply unit (not shown) that drives the electric motor are housed within a cavity formed inside the housing 11. Furthermore, a motion conversion unit 60 that converts the rotational motion of the electric motor into translational motion is housed within the cavity formed inside the housing 11. Conventionally known components can be used as this motion conversion unit 60. In this embodiment, the motion conversion unit 60, which includes an arm 61 connected to the drive rod 43a of the bushing 43 (described later) and converts the rotational motion of the electric motor into linear reciprocating motion of the arm 61, is housed inside the housing 11.

[0036] Furthermore, as described above, in this embodiment, the trimmer 10 includes a holding portion 20 and a head 30.

[0037] The grip part 20 is designed as a long and thin cylindrical shape in the vertical direction Z, and is sized to allow the user to hold it with one hand.

[0038] The head 30 is integrally disposed on the upper side of the gripping part 20 in the vertical direction Z, and a blade unit 40 is provided on the head 30 (see reference). Figure 2 In this embodiment, the blade unit 40 has the function of cutting hair, such as... Figure 5 and Figure 6 As shown, it includes a blade section (blade of the hair removal device) 44, which is formed by arranging a movable piece (movable blade) 45 and a fixed piece (fixed blade) 46 in a manner opposite to each other. The blade section 44 is configured such that the movable blade teeth 452 of the movable piece 45 (described later) reciprocate relative to the fixed blade teeth 462 of the fixed piece 46 in the blade movement direction W.

[0039] And, as Figure 3 and Figure 4 As shown, the blade unit 40 includes a base 41 made of synthetic resin for mounting the blade portion 44. Furthermore, the blade unit 40 includes a pressing spring 42 that presses the movable piece 45 toward the fixed piece 46, and a bushing 43 that is fixed to the movable piece 45 by heat sealing.

[0040] The base portion 41 is a component that forms part of the outline of the head 30 when the blade unit 40 is mounted on the holding portion 20 (see reference). Figure 2 The base portion 41 includes a hook portion 41a that engages the fixing piece 46 and prevents the fixing piece 46 from disengaging from the base portion 41, a positioning protrusion 41b that prevents misalignment of the fixing piece 46, and a rib 41c that prevents misalignment of the pressing spring 42.

[0041] The pressing spring 42 is a component used to make the movable blade tooth 452 and the fixed blade tooth 462 slide into more reliable contact by pressing the movable piece 45 towards the fixed piece 46. The pressing spring 42 includes a through hole 42a through which the hook portion 41a and the positioning protrusion 41b pass, a positioning hole 42b through which the rib 41c passes, and a fixing piece 46 in the width direction Y (see reference). Figure 1 The fixing piece 42c is positioned on the base. In this embodiment, the through hole 42a is formed to be larger than the hook portion 41a and the positioning protrusion 41b, and the inner diameter of the positioning hole 42b is formed to be approximately the same size as the outer diameter of the positioning protrusion 41b. Therefore, the pressing spring 42 is positioned relative to the base portion 41 by having the positioning protrusion 41b pass through the positioning hole 42b.

[0042] The bushing 43 is a drive linkage component mounted on the movable plate 45. The bushing 43 includes a pair of drive rods 43a connected to the arm 61 of the motion conversion unit 60 and a protrusion 43b formed between the pair of drive rods 43a.

[0043] The movable piece 45 includes a main body 451. The main body 451 has a through hole 451a through which the hook portion 41a and the positioning protrusion 41b pass, a through hole 451b through which the protrusion 43b passes, and a pair of through holes 451c through which a pair of drive rods 43a pass respectively. Furthermore, with the protrusion 43b passing through the through hole 451b and the pair of drive rods 43a passing through the pair of through holes 451c respectively, the bushing 43 is fixed to the movable piece 45 by heat sealing.

[0044] Furthermore, in this embodiment, the through hole 451a is formed to be larger than the hook portion 41a and the positioning protrusion 41b. Moreover, with the hook portion 41a and the positioning protrusion 41b passing through the through hole 451a, the movable piece 45 can reciprocate relative to the base portion 41 at least along the blade movement direction W.

[0045] Furthermore, the movable piece 45 includes a plurality of movable blade teeth 452 arranged in the blade movement direction W and a plurality of movable blade grooves 453 formed between adjacent movable blade teeth 452 on one end side of the main body 451.

[0046] The fixing piece 46 includes a main body 461. The main body 461 has an engagement hole 461a for engaging with the hook portion 41a and a through hole 461b for the positioning protrusion 41b to pass through. Furthermore, by engaging the hook portion 41a with the engagement hole 461a and passing the positioning protrusion 41b through the through hole 461b, the fixing piece 46 is fixed to the base portion 41. At this time, the fixing piece 46 is fixed to the base portion 41 in a state where its relative movement with respect to the base portion 41 along the blade movement direction W is restricted.

[0047] In addition, the fixing plate 46 includes a plurality of fixing blade teeth 462 arranged in the blade movement direction W and a plurality of fixing blade grooves 463 formed between adjacent fixing blade teeth 462 at one end of the main body 461.

[0048] The blade unit 40 with such a structure can be assembled, for example, using the method shown below. Furthermore, the method shown below is merely one example; the blade unit 40 can be assembled in a variety of other ways.

[0049] First, by passing the hook portion 41a and the positioning protrusion 41b of the base portion 41 through the through hole 42a of the pressing spring 42 and passing the positioning protrusion 41b through the positioning hole 42b, the pressing spring 42 is installed on the base portion 41 in a positioned state.

[0050] Next, with the protrusion 43b passing through the through hole 451b and the pair of drive rods 43a passing through the pair of through holes 451c respectively, the bushing 43 and the movable piece 45 are integrated by heat sealing. Alternatively, the blade unit 40 can be assembled after the assembly formed by integrating the bushing 43 and the movable piece 45 is prepared in advance.

[0051] Next, by passing the hook portion 41a and the positioning protrusion 41b of the base portion 41 through the through hole 451a of the movable piece 45 integrated with the bushing 43, the movable piece 45 is positioned on the pressing spring 42.

[0052] Next, by engaging the hook portion 41a of the base portion 41 with the engaging hole 461a of the fixing piece 46 and allowing the positioning protrusion 41b to pass through the through hole 461b, the fixing piece 46 is fixed to the base portion 41. At this time, the fixing piece 42c of the pressing spring 42 is pressed in the width direction Y by using the end of the fixing piece 46 (the side opposite to the side where the fixing blade teeth 462 and the fixing blade groove 463 are formed) at the root side. Figure 1 Positioning on.

[0053] By setting it up in this way, it can be assembled into Figure 3 The blade unit 40 shown.

[0054] Moreover, in this embodiment... Figure 3 The blade unit 40 shown is mounted on the gripping part 20 in a detachable manner. In addition, in this embodiment, when the blade unit 40 is mounted on the gripping part 20, the movable blade tooth 452 and the fixed blade tooth 462 protrude forward in the forward-backward direction X.

[0055] Furthermore, the blade unit 40 is mounted on the gripping part 20 with the drive rod 43a of the bushing 43 connected to the arm 61. With this arrangement, when the electric motor is driven, the movable piece 45 reciprocates relative to the fixed piece 46 in the blade movement direction W in conjunction with the reciprocating sliding of the arm 61 along the blade movement direction W.

[0056] Furthermore, with the blade unit 40 installed in the holding part 20, a head 30 having a blade part 44 is formed by covering the fixing plate 46 side with a cover 50. At this time, the top ends of the movable blade teeth 452 and the fixed blade teeth 462 (the movable side hair cutting area 4524 and the fixed side hair cutting area 4624 described later) are exposed from the housing 31 that constitutes the outer shell of the head 30.

[0057] Furthermore, in this embodiment, the trimmer 10 is configured such that the angle θ1 formed by the blade movement direction (the reciprocating sliding direction of the movable blade) W and the up-down direction (the length direction of the holding part 20) is (refer to...). Figure 1The angle θ1 is acute. This angle is determined based on the operability when cutting the hair using the trimmer 10, and is preferably set to 45° or less.

[0058] By configuring it in this way, the difference in feel between moving the trimmer 10 in one direction of the width direction Y (which is the main operating direction) and moving it in the other direction of the width direction Y can be reduced. As a result, it can be used seamlessly in both directions of the width direction Y, further improving the ease of use of the trimmer 10.

[0059] Specifically, such as Figure 13 As shown, hair H can be cut by placing the fixing plate (fixing blade) 46 of the blade part (blade of the hair removal device) 44 close to the skin (skin surface) S, which is an example of the target area.

[0060] In addition, such as Figure 14 As shown, hair H can also be cut by pressing the movable piece (movable blade) 45 of the blade part (blade of the hair removal device) 44 against the skin (skin surface) S, which is an example of the target area.

[0061] Furthermore, in this embodiment, a sliding operation switch 21 is formed in the housing 11 to operate the trimmer 10 (to turn the power on / off). In this embodiment, a sliding operation switch 21 is exemplified as a switch, but any switch capable of turning the power on / off can be a push-button switch or other types of switches.

[0062] In this embodiment, the operation switch 21 is provided on the front surface (front: outer surface) 20a of the handle 20 in a manner that allows it to slide along the vertical direction Z. Specifically, by sliding the operation switch 21 from the lower side to the upper side in the vertical direction Z, the power supply of the trimmer 10 is switched from off to on. Furthermore, by sliding the operation switch 21 from the upper side to the lower side in the vertical direction Z, the power supply of the trimmer 10 is switched from on to off.

[0063] Thus, in this embodiment, by sliding the operation switch 21 upward, the power supply of the trimmer 10 is switched from off to on. Furthermore, by switching the power supply of the trimmer 10 from off to on, the electric motor is driven, and the motion conversion unit 60 converts the rotation of the electric motor into linear reciprocating motion of the arm 61. Moreover, by causing the arm 61 to reciprocate linearly, the movable piece 45 reciprocates linearly relative to the fixed piece 46. Furthermore, the movable blade tooth 452 slides reciprocally relative to the fixed blade tooth 462, and the hair H guided between the fixed blade groove 463 and the movable blade groove 453 is cut off by the movable blade tooth 452 and the fixed blade tooth 462.

[0064] Next, the specific structures of the movable blade tooth 452, the fixed blade tooth 462, the movable blade groove 453, and the fixed blade groove 463 will be described (refer to...). Figure 11 , Figure 12 ).

[0065] The movable blade tooth 452 is formed to protrude from the main body portion 451 in one direction, including a root portion 4521 continuously disposed from the main body portion 451. In this embodiment, the direction orthogonal to the direction in which the movable blade tooth 452 protrudes (protrusion direction) is called the blade movement direction (reciprocating sliding direction of the movable blade) W.

[0066] Furthermore, the movable blade tooth 452 includes a curved portion 4522 that is continuously provided with the root portion 4521 and is bent such that the top end side becomes the fixed piece 46 side, and a cutting portion 4523 that is continuously provided with the curved portion 4522 and is capable of cutting hair H.

[0067] On the other hand, the fixed blade tooth 462 is formed to protrude in one direction from the main body portion 461, including a root portion 4621 continuously disposed from the main body portion 461. In this embodiment, when the movable piece 45 coincides with the fixed piece 46, the movable blade tooth 452 and the fixed blade tooth 462 protrude in the same direction. Therefore, in the state where the blade unit 40 is assembled, the direction in which the fixed blade tooth 462 protrudes (protrusion direction) is also orthogonal to the blade movement direction (the reciprocating sliding direction of the movable blade) W.

[0068] Furthermore, the fixed blade tooth 462 includes a curved portion 4622 that is continuously provided with the root portion 4621 and is bent such that the top side becomes the movable piece 45 side, and a cutting portion 4623 that is continuously provided with the curved portion 4622 and is capable of cutting the hair H.

[0069] Furthermore, with the blade unit 40 assembled, the opposing surfaces 4523a of the cutting portion 4523 and the cutting portion 4623a of the cutting portion 4623 are in contact with each other (see reference). Figure 7 and Figure 8 Therefore, in this embodiment, the opposing surfaces 4523a and 4623a of the cutting portion 4523 and the cutting portion 4623 become a sliding contact surface P1 that slides in contact when the movable piece 45 reciprocates linearly relative to the fixed piece 46. Thus, in this embodiment, the movable blade tooth 452 slides reciprocally relative to the fixed blade tooth 462 in a state where the opposing surfaces 4523a and 4623a are in close contact.

[0070] The movable blade groove 453 is formed between two adjacent movable blade teeth 452 in the blade movement direction (the reciprocating sliding direction of the movable blade) W, with an opening at the top end of the movable blade tooth 452 in the protruding direction. That is, with regard to the movable blade groove 453, the top end 4526 side of the movable blade tooth 452 is the opening side 453a, and the root side of the movable blade tooth 452 is the bottom side 453b (see reference). Figure 7 and Figure 8 ).

[0071] On the other hand, the fixed blade groove 463 is formed between two adjacent fixed blade teeth 462 in the blade movement direction (the reciprocating sliding direction of the movable blade) W, with an opening towards the top end of the fixed blade tooth 462 in the protruding direction. That is, with regard to the fixed blade groove 463, the top end 4626b side of the fixed blade tooth 462 is the opening side 463a, and the root side of the fixed blade tooth 462 is the bottom side 463b (see reference). Figure 7 and Figure 8 ).

[0072] Furthermore, the movable blade tooth 452 and the fixed blade tooth 462 are formed such that, when viewed along the direction in which the movable plate 45 and the fixed plate 46 coincide (the thickness direction of the movable blade tooth 452 and the fixed blade tooth 462), they are tapered at the tips (see reference). Figures 7-10 That is, on both sides of the respective blade movement direction (reciprocating sliding direction of the movable blade) W of the movable blade tooth 452 and the fixed blade tooth 462, edges 4525 and 4625 inclined relative to the protrusion direction of the movable blade tooth 452 and the fixed blade tooth 462 are formed respectively. Preferably, at least one of these edges 4525 and 4625 is a sharp edge so as to more reliably cut the hair H. In this embodiment, a sharper edge 4525 is formed by setting the shape of the movable blade tooth 452 to a shape with chamfered edges.

[0073] Furthermore, in this embodiment, by making the inclination angle of the edge relative to the protruding direction of the movable blade tooth 452 and the fixed blade tooth 462 different, the hair H can be cut more reliably.

[0074] As described above, in this embodiment, since the movable blade tooth 452 and the fixed blade tooth 462 are formed into a tapered shape with a thinner tip, the movable blade groove 453 and the fixed blade groove 463 are shaped to expand toward the opening sides 453a and 463a.

[0075] Specifically, the movable blade groove 453 and the fixed blade groove 463 are formed such that the blade groove angle of the movable blade groove 453 and the blade groove angle of the fixed blade groove 463 intersect at a positive angle located on the bottom sides 453b and 463b. That is, the movable blade groove 453 and the fixed blade groove 463 are formed such that the groove width increases as the blade moving direction (the reciprocating sliding direction of the movable blade) W increases from the bottom sides 453b and 463b toward the opening sides 453a and 463a.

[0076] Thus, in this embodiment, the movable blade groove 453 and the fixed blade groove 463 are formed such that at least the blade groove angles of the opening sides 453a and 463a are positive angles with the intersection point located on the bottom sides 453b and 463b.

[0077] This configuration improves the ability of the material to enter and exit the blade slot.

[0078] For example, in Figure 16 The diagram shows a case where the movable blade groove 453 and the fixed blade groove 463 are formed such that the blade groove angles of the opening sides 453a and 463a are negative angles with the intersection point located at a position further outward (top side) than the opening.

[0079] If the movable blade groove 453 and the fixed blade groove 463 are designed like this, the width of the opening is relatively narrow, resulting in poor guideability of the hair H into the blade groove. Furthermore, it becomes a structure that makes it difficult to discharge the hair H guided into the blade groove to the outside.

[0080] Therefore, in Figure 16 In the structure shown, it is possible that the hair H that has not been cut off and remains in the blade groove may get stuck between the movable blade tooth 452 and the fixed blade tooth 462 and cannot be cut off.

[0081] In contrast, in this embodiment, since the openings of the movable blade groove 453 and the fixed blade groove 463 are the widest, the hair H that has been introduced into the blade groove but not cut can be pushed out of the groove more smoothly. As a result, the situation where the hair H gets stuck between the movable blade tooth 452 and the fixed blade tooth 462 can be suppressed, and the situation where it cannot be cut can be suppressed more reliably.

[0082] Furthermore, when the movable blade tooth 452 reciprocates along the blade movement direction (the reciprocating sliding direction of the movable blade) W, the hair H is guided into the area where the movable blade groove 453 and the fixed blade groove 463 are connected, and thus is sheared by the movable blade tooth 452 and the fixed blade tooth 462.

[0083] Therefore, when the movable blade tooth 452 reciprocates along the blade movement direction (the reciprocating sliding direction of the movable blade) W, the portion of the movable blade tooth 452 that overlaps with the area communicating with the movable blade groove 453 and the fixed blade groove 463 becomes the movable side hair cutting area 4524. Furthermore, when the movable blade tooth 452 reciprocates along the blade movement direction (the reciprocating sliding direction of the movable blade) W, the portion of the fixed blade tooth 462 that overlaps with the area communicating with the movable blade groove 453 and the fixed blade groove 463 becomes the fixed side hair cutting area 4624.

[0084] Furthermore, in this embodiment, the fixed blade tooth 462 protrudes outward compared to the movable blade tooth 452. That is, the tip 4626b of the fixed blade tooth 462 is located outward compared to the tip 4526 of the movable blade tooth 452.

[0085] Furthermore, the bottom side 463b of the fixed blade groove 463 is located closer to the top side than the bottom side 453b of the movable blade groove 453.

[0086] Furthermore, the top tip 4526 of the movable blade tooth 452 is located closer to the top tip side than the bottom side 463b of the fixed blade groove 463.

[0087] Therefore, in this embodiment, the portion of the movable blade tooth 452 located between the top tip 4526 of the movable blade tooth 452 and the bottom side 463b of the fixed blade groove 463 becomes the movable side hair-cutting region 4524. Furthermore, the portion of the fixed blade tooth 462 located between the top tip 4526 of the movable blade tooth 452 and the bottom side 463b of the fixed blade groove 463 becomes the fixed side hair-cutting region 4624.

[0088] Thus, in this embodiment, the fixed blade tooth 462 includes a fixed-side hair cutting region 4624 capable of cutting hair H and a top portion 4626 located at a position closer to the top end than the fixed-side hair cutting region 4624.

[0089] Furthermore, a thick-walled portion 4626a with a thickness T1 that is thicker than the thickness T2 of the fixed side hair-cutting region 4624 is formed at the tip 4626 of the fixed blade tooth (see reference). Figure 11 In this embodiment, a thick-walled portion 4626a is formed by protruding the tip 4626 of the fixed blade tooth 462 toward the side opposite to the movable blade tooth 452. With this configuration, when the blade portion (the blade of the hair removal device) 44 is used with the fixed piece (fixed blade) 46 side in close contact with the skin (skin surface) S, the thick-walled portion 4626a is in close contact with the skin (skin surface) S, which can improve the safety of use or optimize the skin adhesion.

[0090] As described above, in this embodiment, the movable blade tooth 452 and the fixed blade tooth 462 are arranged such that the tip 4626b of the fixed blade tooth 462 protrudes outward compared to the tip 4526 of the movable blade tooth 452. Furthermore, in this embodiment, the length L1 of the thick-walled portion 4626a in the protruding direction of the fixed blade tooth 462 is shorter than the length L2 from the tip 4626b of the fixed blade tooth 462 to the tip 4526 of the movable blade tooth 452 (see reference). Figure 11 By configuring the movable side hair-cutting area 4524 of the movable blade tooth 452 in the thinner area (fixed side hair-cutting area 4624) of the fixed blade tooth 462, the hair can be cut shorter more reliably.

[0091] Furthermore, in this embodiment, the thickness T3 of the movable side hair cutting region 4524 is approximately equal to the thickness T2 of the fixed side hair cutting region 4624. With this arrangement, the cutting height can be made more uniform regardless of whether either the movable piece (movable blade) 45 side or the fixed piece (fixed blade) 46 side is in close contact with the skin (skin surface) S.

[0092] In addition, such as Figure 12 As shown, the movable blade tooth 452 can also be formed such that the thickness T4 on the tip side is thinner than the thickness T5 on the root side. In this way, when the movable blade (movable blade) 45 side is close to the skin (skin surface) S to cut the hair H, the hair H can be cut shorter.

[0093] Alternatively, the fixed blade tooth 462 may also be shaped such that the thickness of the tip side is thinner than the thickness of the root side. Furthermore, the thickness T4 of the tip side of the movable blade tooth 452 may be approximately equal to the thickness of the tip side of the fixed blade tooth 462, and the thickness T5 of the root side of the movable blade tooth 452 may be approximately equal to the thickness of the root side of the fixed blade tooth 462.

[0094] Furthermore, in this embodiment, the tooth width W1 of the movable blade tooth 452 in the blade movement direction (reciprocating sliding direction of the movable blade) is larger than the groove width W4 of the fixed blade groove 463 in the blade movement direction (reciprocating sliding direction of the movable blade) W.

[0095] If the tooth width W1 of the movable blade tooth 452 is made larger than the groove width W4 of the fixed blade groove 463, then no matter where the movable blade tooth 452 is located in the reciprocating sliding area, the tip of the movable blade tooth 452 can be prevented from being entirely located in the fixed blade groove 463.

[0096] In particular, in this embodiment, the tooth width W1 at the tip 4526 of the movable blade tooth 452 is larger than the groove width W4 at the opening of the fixed blade groove 463. That is, the tooth width W1 at the tip 4526 of the movable blade tooth 452, where the width is narrowest, is larger than the groove width W4 at the opening of the fixed blade groove 463, where the width is widest.

[0097] Therefore, it is possible to more reliably prevent the tip of the movable blade tooth 452 from being entirely located within the fixed blade groove 463.

[0098] In this embodiment, when the center C1 of the reciprocating sliding direction of the movable blade tooth 452 is aligned with the center C4 of the reciprocating sliding direction of the fixed blade groove 463, the edges 4525 on both sides of the reciprocating sliding direction of the movable side hair cutting area 4524 coincide with the fixed side hair cutting area 4624.

[0099] In this way, when the area of ​​the movable side cutting area 4524 facing the fixed blade groove 463 is at its maximum, the edges 4525 on both sides contact the fixed side cutting area 4624, thus more reliably suppressing the deformation of the movable blade teeth 452.

[0100] Furthermore, the tooth width W3 of the fixed blade tooth 462 in the blade movement direction (reciprocating sliding direction of the movable blade) is larger than the groove width W2 of the movable blade groove 453 in the blade movement direction (reciprocating sliding direction of the movable blade) W.

[0101] If the tooth width W3 of the fixed blade tooth 462 is made larger than the groove width W2 of the movable blade groove 453, then no matter where the movable blade tooth 452 is in the reciprocating sliding area, the tip of the fixed blade tooth 462 can be prevented from being entirely located within the movable blade groove 453.

[0102] In particular, in this embodiment, the tooth width W3 at the tip 4626b of the fixed blade tooth 462 is larger than the groove width W2 at the opening of the movable blade groove 453. That is, the tooth width W3 at the narrowest tip 4626b of the fixed blade tooth 462 is larger than the groove width W2 at the widest opening of the movable blade groove 453.

[0103] Therefore, it is possible to more reliably prevent the entire tip of the fixed blade tooth 462 from being located within the movable blade groove 453.

[0104] In this embodiment, when the center C3 of the reciprocating sliding direction of the fixed blade tooth 462 is aligned with the center C2 of the reciprocating sliding direction of the movable blade groove 453, the edges 4625 on both sides of the reciprocating sliding direction of the fixed side hair cutting area 4624 coincide with the movable side hair cutting area 4524.

[0105] In this way, when the area of ​​the fixed side hair cutting region 4624 facing the movable blade groove 453 is at its maximum, the edges 4625 on both sides contact the movable side hair cutting region 4524, thus more reliably suppressing the deformation of the fixed blade teeth 462.

[0106] Thus, with the structure of this embodiment, regardless of whether the trimmer 10 is driven or stopped, and regardless of the position of the movable piece (movable blade) 45, the movable blade tooth 452 and the fixed blade tooth 462 can be supported by the surfaces (opposite surfaces 4523a and 4623a) including the edges 4525 and 4625. Therefore, the strength of the blade portion (blade of the depilatory device) 44 can be set to a sufficiently high strength.

[0107] For example in Figure 15 The example illustrates a structure in which the tip of either the movable blade tooth 452 or the fixed blade tooth 462 is located entirely within the fixed blade groove 463 or the movable blade groove 453, regardless of the position of the movable blade tooth 452 in the reciprocating sliding region.

[0108] If the structure is designed in this way, when the blade tip is located entirely within the blade groove, and the blade tip is subjected to concentrated external forces due to collisions with the edge of a table, the movable blade tooth 452 or the fixed blade tooth 462 may deform.

[0109] Furthermore, if the movable blade tooth 452 or the fixed blade tooth 462 bends towards the other side, the movable blade tooth 452 and the fixed blade tooth 462 will interfere with each other, which may cause an increase in drive load and a temperature rise due to increased frictional heat. Moreover, if the drive power is consumed for tasks other than cutting due to the interference between the movable blade tooth 452 and the fixed blade tooth 462, the sharpness of the blade portion 44 may deteriorate.

[0110] On the other hand, if the movable blade tooth 452 or the fixed blade tooth 462 deforms to the side opposite to the other side, a gap will be generated between the movable blade tooth 452 and the fixed blade tooth 462, and the sharpness may be degraded.

[0111] In contrast, in this embodiment, regardless of the position of the movable piece (movable blade) 45, the movable blade tooth 452 and the fixed blade tooth 462 can be supported by the surfaces (opposite surfaces 4523a and 4623a) including edges 4525 and 4625. Therefore, deformation of the movable blade tooth 452 or the fixed blade tooth 462 can be suppressed more reliably, and interference between the movable blade tooth 452 and the fixed blade tooth 462 can be minimized.

[0112] [Functions and Effects]

[0113] The following describes the characteristic structure of the blade and the hair removal device shown in the above embodiments, and the effects obtained therefrom.

[0114] (1) The blade of the hair removal device shown in the above embodiment includes a fixed blade and a movable blade that slides back and forth relative to the fixed blade, and the hair is cut off by the fixed blade and the movable blade.

[0115] In addition, the fixed blade has a plurality of fixed blade teeth arranged in the reciprocating sliding direction of the movable blade relative to the fixed blade and a plurality of fixed blade grooves arranged in the reciprocating sliding direction.

[0116] In addition, the movable blade has a plurality of movable blade teeth arranged in the reciprocating sliding direction and a plurality of movable blade grooves arranged in the reciprocating sliding direction.

[0117] Furthermore, the movable blade teeth are formed such that the tooth width in the reciprocating sliding direction is larger than the groove width in the reciprocating sliding direction of the fixed blade groove.

[0118] Furthermore, the fixed blade teeth are formed such that the tooth width in the reciprocating sliding direction is larger than the groove width in the reciprocating sliding direction of the movable blade groove.

[0119] Furthermore, the fixed blade groove and the movable blade groove are formed such that at least the blade groove angle on the open side is a positive angle with the intersection point located on the bottom side.

[0120] If the width of the movable blade tooth in the reciprocating sliding direction is made larger than the width of the fixed blade groove in the reciprocating sliding direction, then no matter where the movable blade tooth is in the reciprocating sliding area, the tip of the movable blade tooth will not be entirely located in the fixed blade groove.

[0121] Furthermore, if the tooth width of the fixed blade tooth in the reciprocating sliding direction is made larger than the groove width of the movable blade groove in the reciprocating sliding direction, then no matter where the movable blade tooth is in the reciprocating sliding area, the tip of the fixed blade tooth will not be entirely located within the movable blade groove.

[0122] That is, regardless of whether the hair removal device is in motion or not, and regardless of the position of the movable blade, the movable blade teeth and the fixed blade teeth can be supported by the surface including the edge, so the strength of the blade of the hair removal device can be set to a sufficiently strong strength.

[0123] The result is that the blade deformation of the depilatory device can be suppressed more reliably, and interference between the fixed blade and the movable blade can be suppressed to the greatest extent.

[0124] By setting the structure as described in (1) above, a blade for a depilatory device that can more reliably suppress deformation can be obtained.

[0125] Furthermore, if the fixed blade groove and the movable blade groove are formed such that at least the blade groove angle on the open side intersects at a positive angle on the bottom side, it is possible to suppress the obstruction of the introduction of hair into the blade groove and the export of hair from the blade groove on the open side. That is, it is possible to further improve the introduction of hair into the blade groove and the export of hair from the blade groove.

[0126] (2) In addition, in the blade of the hair removal device described in (1) above, the fixed blade groove and the movable blade groove may be formed such that the groove width increases as the blade slides back and forth from the bottom side to the opening side.

[0127] This can further improve the feeding and discharging properties within the blade groove.

[0128] (3) In addition, in the blade of the hair removal device described in (1) or (2) above, the movable blade teeth may be formed such that the thickness of the tip side is thinner than the thickness of the root side.

[0129] This allows for shorter hair cuts when the movable blade is pressed close to the skin.

[0130] (4) Furthermore, in the blade of any of the hair removal devices described in (1) to (3) above, the fixed blade teeth may include a fixed-side hair cutting area capable of cutting hair and a tip portion located at a position closer to the tip than the fixed-side hair cutting area. Moreover, a thick-walled portion with a thickness greater than that of the fixed-side hair cutting area may be formed at the tip portion of the fixed blade teeth.

[0131] If the thickness of the tip of the fixed blade teeth is made greater than the thickness of the area where the fixed blade teeth cut the hair, the thickness of the area where the hair is cut can be reduced, while the tip that contacts the skin can be thickened. The result is that the hair can be cut shorter, and safety or skin adhesion can be improved.

[0132] (5) Furthermore, in the blade of the hair removal device described in (4) above, the fixed blade tooth and the movable blade tooth may be configured such that the tip of the fixed blade tooth protrudes outward compared to the tip of the movable blade tooth. Moreover, the length of the thick-walled portion in the protruding direction of the fixed blade tooth may be shorter than the length from the tip of the fixed blade tooth to the tip of the movable blade tooth.

[0133] If the cutting area of ​​the movable blade tooth is configured in a thinner area of ​​the fixed blade tooth, the hair can be cut shorter more reliably.

[0134] (6) Furthermore, in the blades of any of the hair removal devices described in (1) to (5) above, the fixed blade teeth may include a fixed side hair cutting region capable of cutting hair, and the movable blade teeth may include a movable side hair cutting region capable of cutting hair. Moreover, the thickness of the movable side hair cutting region may be approximately equal to the thickness of the fixed side hair cutting region.

[0135] In this way, regardless of whether the movable blade side or the fixed blade side is pressed against the skin, the cutting height can be made more uniform.

[0136] (7) Furthermore, the blade of the hair removal device described in the above embodiment includes a fixed blade and a movable blade that slides back and forth relative to the fixed blade, and the hair is cut off by the fixed blade and the movable blade.

[0137] In addition, the fixed blade has a plurality of fixed blade teeth arranged in the reciprocating sliding direction of the movable blade relative to the fixed blade and a plurality of fixed blade grooves arranged in the reciprocating sliding direction.

[0138] In addition, the movable blade has a plurality of movable blade teeth arranged in the reciprocating sliding direction and a plurality of movable blade grooves arranged in the reciprocating sliding direction.

[0139] In addition, the fixed blade teeth include a fixed side hair-cutting region capable of cutting hair, and the movable blade teeth include a movable side hair-cutting region capable of cutting hair.

[0140] Furthermore, when viewed along the direction in which the fixed blade and the movable blade coincide, when the center of the reciprocating sliding direction of the movable blade tooth coincides with the center of the reciprocating sliding direction of the fixed blade groove, the edges on both sides of the reciprocating sliding direction of the movable side hair-cutting area coincide with the fixed side hair-cutting area.

[0141] Furthermore, when viewed along the direction in which the fixed blade and the movable blade coincide, when the center of the reciprocating sliding direction of the fixed blade teeth coincides with the center of the reciprocating sliding direction of the movable blade groove, the edges on both sides of the reciprocating sliding direction of the fixed side hair cutting area coincide with the movable side hair cutting area.

[0142] In this way, when the area of ​​the movable side cutting region facing the fixed blade tooth is at its maximum, the edges on both sides contact the fixed side cutting region, thus more reliably suppressing the deformation of the movable blade tooth.

[0143] Furthermore, when the area of ​​the fixed side hair cutting region facing the movable blade tooth is at its maximum, the edges on both sides contact the movable side hair cutting region, thus more reliably suppressing the deformation of the fixed blade tooth.

[0144] That is, by setting the structure as described in (7) above, it is possible to obtain a blade for a hair removal device that can more reliably suppress deformation.

[0145] (8) In addition, in the blade of the hair removal device of any of (1) to (7) above, the movable blade may be pressed towards the fixed blade side by a pressing spring.

[0146] This allows for more reliable sliding contact between the movable and fixed blade teeth, further improving hair-cutting performance. Furthermore, by adopting the structure shown in the above embodiment, deformation of the blades in the hair removal device can be more reliably suppressed, thus allowing for thinner movable and fixed blades or further increases in the pressing force of the pressing spring.

[0147] (9) Furthermore, the hair removal device shown in the above embodiment has the blade of any of the hair removal devices described in (1) to (8).

[0148] In this way, a hair removal device can be obtained that can more reliably suppress the deformation of the blades in the hair removal device.

[0149] [other]

[0150] The above describes the blade of the hair removal device and the hair removal device with the blade of the hair removal device disclosed herein, but it is not limited to the above description. Various modifications and improvements can be made, which is self-evident to those skilled in the art.

[0151] For example, in the above embodiment, a hair removal device is exemplified by a trimmer 10 in which the angle θ1 formed by the moving direction of the movable blade 45 relative to the fixed blade 46 and the length direction of the holding portion 20 is an acute angle. However, the hair removal device is not limited to the trimmer 10 shown in the above embodiment, and this disclosure can be applied to various types of hair removal devices. For example, this disclosure can be applied to hair clippers (trimmers) in which the angle formed by the moving direction of the movable blade relative to the fixed blade and the length direction of the holding portion is a right angle.

[0152] Furthermore, the specifications (shape, size, layout, etc.) of the head, grip, and other details can also be changed appropriately.

[0153] As described above, the blade of the hair removal device disclosed herein and the hair removal device equipped with the blade can suppress blade deformation, and therefore can be applied to blades of various hair removal devices, such as those for home and commercial use, and hair removal devices equipped with the blade.

Claims

1. A blade for a hair removal device, comprising a fixed blade and a movable blade that reciprocates relative to the fixed blade, wherein the fixed blade and the movable blade are used to cut hair, wherein... The fixed blade has a plurality of fixed blade teeth arranged in the reciprocating sliding direction relative to the movable blade and a plurality of fixed blade grooves arranged in the reciprocating sliding direction. The movable blade has a plurality of movable blade teeth arranged in the reciprocating sliding direction and a plurality of movable blade grooves arranged in the reciprocating sliding direction. The movable blade teeth are formed such that the tooth width in the reciprocating sliding direction is larger than the groove width in the reciprocating sliding direction of the fixed blade groove. The fixed blade teeth are formed such that the tooth width in the reciprocating sliding direction is larger than the groove width in the reciprocating sliding direction of the movable blade groove. The fixed blade groove and the movable blade groove are formed such that at least the blade groove angle on the open side is a positive angle with the intersection point located on the bottom side.

2. The blade of the hair removal device according to claim 1, wherein, The fixed blade groove and the movable blade groove are formed such that the groove width increases in the reciprocating sliding direction as it moves from the bottom side toward the opening side.

3. The blade of the hair removal device according to claim 1 or 2, wherein, The movable blade teeth are formed such that the thickness on the tip side is thinner than the thickness on the root side.

4. The blade of the hair removal device according to claim 1 or 2, wherein, The fixed blade teeth include a fixed-side hair-cutting region capable of cutting hair and a tip portion located at a position closer to the tip than the fixed-side hair-cutting region. A thick-walled portion with a thickness greater than that of the fixed side hair-cutting area is formed at the tip of the fixed blade tooth.

5. The blade of the hair removal device according to claim 4, wherein, The fixed blade tooth and the movable blade tooth are configured such that the tip of the fixed blade tooth protrudes outward compared to the tip of the movable blade tooth. The length of the thick-walled portion in the protruding direction of the fixed blade tooth is shorter than the length from the tip of the fixed blade tooth to the tip of the movable blade tooth.

6. The blade of the hair removal device according to claim 1 or 2, wherein, The fixed blade teeth include a fixed-side hair-cutting region capable of cutting hair. The movable blade teeth include a movable side hair-cutting region capable of cutting hair. The thickness of the movable side hair cutting area is approximately equal to the thickness of the fixed side hair cutting area.

7. The blade of the hair removal device according to claim 1 or 2, wherein, The movable blade is pressed towards the fixed blade by a compression spring.

8. A blade for a hair removal device, comprising a fixed blade and a movable blade that reciprocates relative to the fixed blade, wherein the fixed blade and the movable blade are used to cut hair, wherein... The fixed blade has a plurality of fixed blade teeth arranged in the reciprocating sliding direction relative to the movable blade and a plurality of fixed blade grooves arranged in the reciprocating sliding direction. The movable blade has a plurality of movable blade teeth arranged in the reciprocating sliding direction and a plurality of movable blade grooves arranged in the reciprocating sliding direction. The fixed blade teeth include a fixed-side hair-cutting region capable of cutting hair. The movable blade teeth include a movable side hair-cutting region capable of cutting hair. When viewed along the direction in which the fixed blade and the movable blade coincide, and the center of the reciprocating sliding direction of the movable blade tooth aligns with the center of the reciprocating sliding direction of the fixed blade groove, the edges on both sides of the movable side hair-cutting area in the reciprocating sliding direction coincide with the fixed side hair-cutting area. When viewed along the direction in which the fixed blade and the movable blade coincide, and the center of the reciprocating sliding direction of the fixed blade tooth coincides with the center of the reciprocating sliding direction of the movable blade groove, the edges on both sides of the reciprocating sliding direction of the fixed side hair cutting area coincide with the movable side hair cutting area.

9. The blade of the hair removal device according to claim 8, wherein, The movable blade is pressed towards the fixed blade by a compression spring.

10. A hair removal device, wherein, The hair removal device includes the blade of the hair removal device according to any one of claims 1 to 9.

Images