Hair removal device

Abstract

The present disclosure provides a hair removal device capable of more reliably inhibiting liquid from remaining in a non-waterproof space in which a blade portion is partially exposed. A hair removal device (A) of the present disclosure includes a main body portion (D), a blade portion provided to the main body portion (D) and capable of removing hair, and a motor (43) built in the main body portion (D) and driving the blade portion. In addition, a waterproof space (S3) that accommodates the motor (43) and inhibits the immersion of liquid, and a non-waterproof space (S6) in which the blade portion is arranged in a partially exposed state and in which the immersion of liquid is allowed are formed in the main body portion (D). Furthermore, the main body portion (D) includes a drying mechanism (100) that dries the non-waterproof space (S6), and the drying mechanism (100) includes a heat generating member (101) that generates heat.

Description

Technical Field

[0001] This disclosure relates to hair removal devices. Background Technology

[0002] Previously, as shown in Patent Document 1, there was a known electric shaver (i.e., an example of a hair removal device) that included a main body and a blade part capable of removing hair. A non-waterproof space was provided in the main body for the blade part to be partially exposed and for liquid to be allowed to enter, so that the blade part could be cleaned with a liquid such as water.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-085870 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In such a hair removal device, it is preferable to prevent liquid residue from remaining in the non-waterproof space where the blade supply section is partially exposed.

[0008] Therefore, the purpose of this disclosure is to provide a hair removal device that can more reliably suppress liquid residue in non-waterproof spaces where the blade portion is partially exposed.

[0009] Solution for solving the problem

[0010] One hair removal device disclosed herein includes: a main body; a blade portion disposed in the main body and capable of removing hair; and a motor built into the main body to drive the blade portion. The main body forms: a waterproof space housing the motor and preventing liquid ingress; and a non-waterproof space for partially exposed blade portion, allowing liquid ingress. The main body includes a drying mechanism for drying the non-waterproof space, the drying mechanism including a heat-generating member.

[0011] The effects of the invention

[0012] According to this disclosure, a hair removal device can be provided that can more reliably suppress liquid residue in non-waterproof spaces where the blade portion is partially exposed. Attached Figure Description

[0013] Figure 1 This is a perspective view of an electric razor as an example of a hair removal device, taken from the top of the front side.

[0014] Figure 2 This is a 3D image obtained by viewing the electric razor from the lower back side.

[0015] Figure 3 This is the front view of an electric razor.

[0016] Figure 4 This is a side view of an electric razor.

[0017] Figure 5 This is a three-dimensional view obtained by observing the state of the blade guard after it has been removed from the main body of the device from the top side of the front side.

[0018] Figure 6 This is a three-dimensional view obtained by observing the state of the blade guard after it has been removed from the main body of the device from the lower rear side.

[0019] Figure 7 This is a schematic diagram showing the main body of an electric razor placed in the palm of the hand.

[0020] Figure 8 This diagram schematically illustrates the state of holding the main body of an electric razor in a hand-wrapped manner.

[0021] Figure 9 This is a diagram illustrating an example of how to use an electric razor.

[0022] Figure 10 This is another illustration showing how to use an electric razor.

[0023] Figure 11 This is a partially exploded view of the main body of the electric shaver, a perspective view obtained from the top front side after the outer blade assembly has been removed from the housing.

[0024] Figure 12 This is a partially exploded view of the outer blade assembly, a perspective view obtained from the top front side after the outer blade box has been removed from the upper base housing.

[0025] Figure 13 This is a diagram showing the main body of an electric razor device in partial decomposition. It is a perspective view obtained by viewing the device from above on the front side, with the base divided into the main body and the upper base shell, and the blades divided into the outer blade box and the mesh inner blade.

[0026] Figure 14 It is a partial breakdown of the base body, a three-dimensional view obtained by observing from the top of the front side after the waterproof unit, switch button and USB cover have been removed from the lower base shell.

[0027] Figure 15 It is a partial exploded view of the base body, a perspective view obtained from the lower back side after the waterproof unit, switch button and USB cover have been removed from the lower base shell.

[0028] Figure 16 This is a three-dimensional view obtained by observing the waterproof unit from the top of the front side, which is divided into lower and upper units.

[0029] Figure 17 This is a three-dimensional view obtained by observing the waterproof unit from the bottom of the back side, which is divided into lower and upper units.

[0030] Figure 18 It is a diagram that shows the lower unit in partial decomposition. It is a three-dimensional view obtained by looking at the state after the internal components have been removed from the lower shell from the front side.

[0031] Figure 19 It is a diagram that shows the lower unit in partial decomposition. It is a perspective view obtained by observing the internal components after they have been removed from the lower outer shell from the lower rear side.

[0032] Figure 20 This is an exploded perspective view of the internal components of the lower unit, obtained by observing them from above on the front side.

[0033] Figure 21 This is an exploded perspective view of the internal components of the lower unit, obtained by observing them from the lower rear side.

[0034] Figure 22 This is an exploded 3D view obtained by observing the main circuit unit of the lower unit from above on the front side.

[0035] Figure 23 This is an exploded 3D view obtained by observing the main circuit unit of the lower unit from the bottom of the rear side.

[0036] Figure 24 This is an exploded 3D view obtained by observing the sub-circuit unit of the lower unit from above on the front side.

[0037] Figure 25 This is an exploded perspective view of the sub-circuit unit of the lower unit, obtained by observing it from the bottom of the rear side.

[0038] Figure 26 This is an exploded perspective view of the USB circuit unit in the lower part of the unit, obtained by observing it from above on the front side.

[0039] Figure 27 This is an exploded perspective view of the USB circuit unit in the lower part of the unit, obtained by observing it from the bottom of the rear side.

[0040] Figure 28 This is an exploded three-dimensional view obtained by observing the upper unit from the top of the front side.

[0041] Figure 29This is an exploded perspective view of the upper unit obtained from the lower rear side.

[0042] Figure 30 This is an exploded three-dimensional view of the linear motor of the upper unit, obtained by observing it from above on the front side.

[0043] Figure 31 This is an exploded perspective view of the linear motor of the upper unit, obtained by observing it from the lower rear side.

[0044] Figure 32 This is a side view showing the linear motor of the upper unit.

[0045] Figure 33 This is a diagram illustrating an example of a charging method for an electric shaver.

[0046] Figure 34 This is an exploded perspective view of the blade guard obtained from the top side of the front.

[0047] Figure 35 This is an exploded perspective view of the blade guard obtained from the lower back side.

[0048] Figure 36 This is a cross-sectional view obtained by cutting the electric razor with a plane perpendicular to the front-back direction.

[0049] Figure 37 This is a cross-sectional view obtained by cutting the electric razor with a plane perpendicular to the width direction.

[0050] Figure 38 This is a cross-sectional view obtained by cutting the electric razor after the battery has been removed with a plane perpendicular to the front-back direction.

[0051] Figure 39 This is a cross-sectional view obtained by cutting the electric razor after the battery has been removed with a plane perpendicular to the width direction.

[0052] Figure 40 It is an enlarged representation Figure 37 A cross-sectional view of the slit section.

[0053] Figure 41 It is a diagram illustrating the positional relationship between the centers of gravity of the outer blade box, the linear motor, and the battery.

[0054] Figure 42 This is a perspective view of an electric shaver as a first modification of a hair removal device.

[0055] Figure 43 This is an exploded view showing an electric shaver as a first modified example of a hair removal device.

[0056] Figure 44This is a perspective view of an electric shaver, which is a second modification of a hair removal device.

[0057] Figure 45 This is an exploded view showing an electric shaver as a second modification of a hair removal device.

[0058] Figure 46 This is a perspective view of an electric shaver, which is a third variation of a hair removal device.

[0059] Figure 47 This is an exploded view showing an electric shaver as a third modification of a hair removal device.

[0060] Figure 48 This is a perspective view of an electric shaver, which is the fourth variation of a hair removal device.

[0061] Figure 49 This is an exploded view showing an electric shaver as a fourth modification of a hair removal device.

[0062] Figure 50 This is an exploded perspective view showing the first modified example of the drying mechanism.

[0063] Figure 51 This is an exploded perspective view showing the second modified example of the drying mechanism.

[0064] Figure 52 This is an exploded perspective view showing the third modified example of the drying mechanism.

[0065] Figure 53 This is a perspective view showing the third modified example of the drying mechanism.

[0066] Explanation of reference numerals in the attached figures

[0067] A. Electric shaver (i.e., an example of a hair removal device); B. Device body; B1. Housing; B2. Outer blade assembly; C. Blade guard; C1. Central axis; C1a. Outer surface; D. Base (i.e., an example of the main body); D1. Peripheral wall; D1a. Outer surface; E. Blade part; F1. Head body; 1. Base body; 2. Waterproof unit; 3. Lower unit; 4. Upper unit; 5. Blade unit; 6. Blade guard body; 7. Mounting part; 8. Charging cable; 10. Lower base housing; 11. Bottom wall; 111. Bottom surface; 111a. Peripheral part; 112. Through hole; 113. Through hole; 114. Notch; 12. Peripheral wall; 12a. Outer surface; 120. Rib; 120a. Threaded hole; 121. Front wall; 1211. Through hole; 122. Rear wall; 1221. Through hole; 123. Side wall; 1231. Notch; 13. Switch button; 131. Outer surface; 14. USB cover; 141. Cover body; 1411. Outer surface; 1412. Waterproof cover; 142. Connecting piece; 1421. Hook; 15. Upper base shell; 15a. Upper opening; 15b. Lower opening; 151. Peripheral wall; 151a. Outer surface; 151b. Upper end face; 1511. Front wall; 1512. Rear wall; 1513. Side wall; 15131. Notch; 15132. Engaging protrusion; 15133. Engaging hook; 31. Lower shell; 311. Bottom wall; 3111. Through hole; 3112. Pressing 312. Manhole; 3121. Peripheral wall; 3121. Front wall; 3122. Rear wall; 31221. Receiving recess; 3123. Side wall; 3124. Extending wall; 31241. Threaded hole; 32. Sealing member; 321. Main body; 322. Flexible part; 323. Light guide part; 33. Circuit unit; 331. Main circuit unit; 3311. Main circuit board; 3312. Busbar terminal; 3313. Electrode terminal; 332. Sub-circuit unit; 3321. Sub-circuit board; 33211. Switching element; 3322. Light shielding member; 33221. Light shield; 333. USB circuit unit; 3331. USB circuit board; 3332. USB terminal (i.e., an example of a charging part); 33 33. Holding component; 33331. Threaded hole; 3334. Rubber receiving component; 3335. Sealing rubber; 34. Battery; 35. Battery holding platform; 351. Main circuit unit holding part; 352. Secondary circuit unit holding part; 353. USB circuit unit holding part; 41. Upper shell; 41a. Upper seal; 41b. Lower seal; 411. Bottom wall; 4111. Threaded hole; 4113. Through hole; 412. Peripheral wall; 4121. Front wall; 4122. Rear wall; 4123. Side wall; 41231. Removal button holding part; 41232. Spring receiving part; 4124. Flange part; 41241. Threaded hole; 41242. Upper threaded hole; 41243. Lower threaded hole;414. Extension wall; 4141. Through hole; 4142. Threaded hole; 42. Top wall; 421. Top wall body; 4211. Threaded hole; 4212. Threaded hole; 4213. Through hole; 422. Pressing plate; 4221. Threaded hole; 4222. Through hole; 423. Waterproof rubber; 4231. Through hole; 43. Linear motor (i.e., an example of a motor); 431. Electromagnetic core assembly; 4311. Base; 4312. Electromagnet; 43121. Core; 43122. Winding frame; 43123. Coil; 432. Magnetic assembly; 4321. Holding part; 4322. Permanent magnet; 4323. Back yoke; 4324. Drive element; 4325. Drive element; 4326. Drive pin; 4 33. Connecting plate; 4331. Upper extension part; 4332. Lower extension part; 43321. Mounting protrusion; 4333. Elastic plate part; 434. Connecting spring part; 4341. Connecting base part; 4342. Spring plate part; 43421. Torsion part; 43422. Flexing part; 44. Release button; 441. Main body part; 4411. Engaging hook; 44111. Hook part; 442. Shaft part; 443. Coil spring; 5a. Skin contact surface; 50. Outer blade box; 51. Mesh blade assembly; 511. Mesh blade (i.e., included in the outer blade and included in the blade part); 512. Mesh inner blade (i.e., included in the inner blade and included in the blade part); 52. Mesh blade assembly for fine shaving; 521 521. Fine shaving mesh blade (i.e., included in the outer blade and included in the blade portion); 522. Fine shaving mesh inner blade (i.e., included in the inner blade and included in the blade portion); 523. Roller; 53. Slit blade assembly; 531. Slit outer blade (i.e., included in the outer blade and included in the blade portion); 532. Slit inner blade (i.e., included in the inner blade and included in the blade portion); 54. Outer blade housing; 541. Release button; 5411. Elastic sheet; 5412. Engaging hole; 5413. Operating part; 61. Waterproof cover storage recess; 611. Protrusion; 612. Protrusion; 62. Operating protrusion; 621. Lower end face; 63. Magnet; 64. Buffer; 651. Waterproof cover; 6511. Covering part; 6512. Flange part ; 652, O-ring; 7a, mounting surface; 81, O-ring; 91, rivet (i.e., an example of a press-fit component); 92, screw; 93, screw; 94, screw; 95, screw; 96, screw; 97, screw; 98, screw; 100, drying mechanism; 101, membrane heater (i.e., an example of a heating component); 101a, serpentine section; 101b, connecting section; 101c, end; 102, heat dissipation component; 103, thermistor; 200, partition wall; G1, center of gravity; G2, center of gravity; G3, center of gravity; L1, height; L2, length; L3, distance; L4, distance; L5, distance; S1, first space; S2, second space; S3, waterproof space on the main body side (i.e., an example of a waterproof space);S4, Non-waterproof space; S5, Waterproof space on the side of the blade guard; S6, Non-waterproof space; U1, Skin; U2, Hand; U21, Palm; U22, Fingers. Detailed Implementation

[0068] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, there are instances where overly detailed descriptions are omitted. For example, detailed descriptions of well-known matters may be omitted, or descriptions of substantially the same structures may be repeated.

[0069] 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.

[0070] In addition, in the following embodiments, an electric razor is exemplified as a hair removal device for cutting off the beard (i.e., hair) of the user. Furthermore, in the following embodiments, a small electric razor (also called a shaver) that is housed in the user's palm is exemplified as an electric razor that can be used with the main body covered by the palm.

[0071] In the following embodiments, the direction in which multiple blade assemblies are arranged side by side is defined as the X direction, and the direction in which each blade assembly extends is defined as the Y direction. Furthermore, the vertical direction when the electric razor is configured with the blade portion at the top and the main body portion at the bottom is defined as the Z direction. The X direction is also referred to as the second direction, the front-back direction, or the shaving direction. The Y direction is also referred to as the first direction, the left-right direction, or the width direction. The Z direction is also referred to as the vertical direction.

[0072] In addition, in the following embodiments, the side with the USB cover will be defined as the rear side of the electric shaver (i.e., the rear in the X direction).

[0073] (Implementation Method)

[0074] Figure 1 This is a perspective view of an electric shaver A, an example embodiment of a hair removal device, viewed from above on the front side. Figure 2 This is a perspective view of the electric razor A as described in the embodiment, viewed from below on the back side. Figure 3 This is a front view of the electric razor A, representing an embodiment. Figure 4 This is a side view of the electric razor A according to the embodiment. Figure 5 This is a three-dimensional view obtained from the top of the front side, showing the state after the blade guard C has been removed from the main body B of the device. Figure 6 This is a perspective view obtained from the lower rear side, showing the state after the blade guard C has been removed from the main body B of the device. (See image below.) Figures 1-6As shown, the electric shaver A of this embodiment (i.e., an example of a hair removal device) includes a device body B, which has a base D (i.e., an example of a main body) and a blade portion E. The blade portion E is configured such that a portion (more specifically, the skin contact surface 5a) is exposed to the base D, enabling it to cut beard hairs (i.e., an example of hair removal). Additionally, the electric shaver A includes a blade protector C, which is detachably mounted to the device body B and protects the blade portion E. In this specification, beard cutting is an example of hair removal.

[0075] Thus, in this embodiment, when the electric razor A is not in use, the blade protector C can be mounted on the device body B. This prevents the blade part E from being exposed to the outside, thereby protecting the blade part E.

[0076] Figure 7 This diagram schematically illustrates the state in which the main body B of the electric razor A of the embodiment is placed in the palm of the hand. Figure 8 This diagram schematically illustrates the state in which the main body B of the electric razor A of the embodiment is held by hand. Figure 9 This is a diagram illustrating an example of how to use the electric razor A according to an embodiment. Figure 10 This diagram schematically illustrates another example of how to use the electric razor A according to the embodiment. When using the electric razor A, as... Figures 7-10 As shown, the blade guard C is removed from the device body B, exposing a portion of the blade part E to the outside. This exposed portion of the blade part E then slides into contact with the user U's skin U1. This cuts off the user U's beard (i.e., an example of hair). The term "hair removal" as used in this specification includes the meaning of cutting hair.

[0077] Furthermore, in this embodiment, a linear motor 43 (i.e., an example of a motor, see below) built into the base D (i.e., the main body) is used. Figure 28 This drives the blade section E. Furthermore, the battery 34 (see below) Figure 18 The battery 34 is disposed at the base D (i.e., an example of the main body) so as to supply power from the battery 34 to the linear motor 43 (i.e., an example of the motor).

[0078] In this embodiment, the top and peripheral walls of the electric razor A are generally shaped to be smoothly curved with a central bulge.

[0079] Specifically, the outer surface C1a of the blade guard C is a curved surface that bulges upward. Furthermore, in this embodiment, the radius of curvature of the top portion of the outer surface C1a is larger than the radius of curvature of the circumferential portion, and the top portion of the outer surface C1a becomes a curved surface that is close to a horizontal plane.

[0080] Furthermore, with the blade protector C installed on the main body B of the device, the peripheral portion of the outer surface C1a of the blade protector C and the outer surface D1a of the peripheral wall D1 of the base D approximately coincide with a smooth and continuous curved surface. That is, with the blade protector C installed on the main body B of the device, the peripheral portion of the outer surface C1a of the blade protector C and the outer surface D1a of the peripheral wall D1 of the base D each constitute a portion of a curved surface.

[0081] In addition, in this embodiment, the electric razor A is formed with a shorter length (i.e., thinner thickness) in the X direction (i.e., the second direction, the front-back direction, and the shaving direction) and a longer length (i.e., wider width) in the Y direction (i.e., the first direction, the left-right direction, and the width direction).

[0082] Therefore, in this embodiment, with the blade guard C installed on the main body B of the device, a flat curved body with a thinner thickness in the X direction (i.e., the front-to-back direction) is formed.

[0083] Furthermore, by making the electric shaver A into the shape described above, the design (i.e., appearance) of the electric shaver A (more specifically, the device body B and the base D) is improved.

[0084] Figure 36 This is a cross-sectional view of an electric razor A obtained by cutting it with a plane perpendicular to the X direction (i.e., the front-to-back direction). Figure 37 This is a cross-sectional view of an electric razor A obtained by cutting it with a plane perpendicular to the Y direction (i.e., the width direction). Figure 38 This is a cross-sectional view obtained by cutting the electric razor A, which has had its battery 34 removed, with a plane perpendicular to the X direction (i.e., the front-to-back direction). Figure 39 This is a cross-sectional view obtained by cutting the electric razor A, which has had its battery 34 removed, with a plane perpendicular to the Y direction (i.e., the width direction). Figure 40 It is an enlarged representation Figure 37 A cross-sectional view of the slit portion. In this embodiment, as... Figures 36-39 As shown, the electric shaver A can stand up independently. Here, "stand up independently" means that the electric shaver A is positioned on a horizontal mounting surface with the blade part E on top without the use of auxiliary components. Specifically, the bottom part of the electric shaver A is not bulging outward, and at least a portion of the bottom part is in contact with the mounting surface 7a of the mounting part 7 such as a table, so that the electric shaver A or the device body B can stand upright on the mounting surface 7a with the blade part E on top.

[0085] In this embodiment, the bottom surface of the electric shaver A is a concave curved surface that is recessed upwards, so that the periphery of the bottom surface of the electric shaver A contacts the mounting surface 7a, thereby enabling the electric shaver A or the device body B to stand upright on the mounting surface 7a.

[0086] In addition, such as Figure 7 As shown, the electric razor A or the main body B can also be positioned so that the blade part E is on the upper part of the user U's palm U21.

[0087] Thus, in addition to its excellent design, the electric razor A of this embodiment can stand upright on the mounting surface 7a, so it can be used as interior decoration when the electric razor A is not in use.

[0088] For example, the electric razor A can be placed as interior decoration on a table or other mounting unit 7 in the room. This way, when performing a task in the room and wanting to use the electric razor A, there's no need to move it to the sink or other places where electric razors are usually stored, making it easier to use. Furthermore, after use, it can be used as interior decoration in the room.

[0089] In addition, in this embodiment, such as Figure 36 As shown, for the device body B, the length L1 in the Z direction (i.e., the vertical direction) (i.e., the height of the device body B) is shorter than the length L2 in the Y direction (i.e., the width direction) (i.e., the width). Thus, in this embodiment, the device body B has a wider width. This allows the device body B to stand up autonomously in a more stable state.

[0090] In addition, by reducing the height of the main body B of the device, thus... Figure 8 As shown, the lower end side (more specifically the bottom surface 111) of the base D is made to face the palm U21, and the fingertip is made to get closer to the skin contact surface 5a of the blade part E when the finger U22 grasps the outer surface D1a of the peripheral wall D1 of the base D.

[0091] Furthermore, by bringing the fingertips closer to the skin contact surface 5a of the blade part E, the lower end side (more specifically, the bottom surface 111) of the base D can be positioned opposite the palm U21, and the base D can be gripped more stably when the fingers U22 grasp the outer surface D1a of the peripheral wall D1 of the base D. That is, even when using the electric razor A with the lower end side (more specifically, the bottom surface 111) of the base D facing the palm U21 and the fingers U22 grasping the outer surface D1a of the peripheral wall D1 of the base D, the electric razor A can be used without wobbling.

[0092] Thus, in this embodiment, even when the base D is covered by hand U2 from the bottom side (e.g., Figure 8(As shown in the diagram) Even when using electric razor A, it is possible to suppress the deterioration of operability.

[0093] Therefore, if the electric razor A of this embodiment is used, the electric razor A can be used while holding the base D in various ways. For example, such as Figure 9 As shown, the electric razor A can be used with the hand U2 covering the base D from the bottom side (for example, with the lower end of the base D facing the palm U21 and the fingers U22 grasping the outer surface D1a of the peripheral wall D1 of the base D). Additionally, as... Figure 10 As shown, the electric razor A can also be used with the palm U21 holding the peripheral wall D1 of the base D (for example, with the palm U21 and fingers U22 in contact with the outer surface D1a of the peripheral wall D1 of the base D).

[0094] Furthermore, in this embodiment, the size of the base D is set in such a way that when a typical adult male places the lower end side (more specifically the bottom surface 111) of the base D opposite the palm U21 and grasps the outer surface D1a of the peripheral wall D1 of the base D with his fingers U22, the fingertip is located near the skin contact surface 5a of the blade part E (e.g., the base D).

[0095] Figure 41 This describes the outer blade housing 50 (more specifically, the blade section E, for example, see reference 50) in the embodiment. Figure 12 A diagram showing the positional relationship between the centers of gravity G1 to G3 of the linear motor 43 and the battery 34. In this embodiment, as... Figure 41 As shown, the blade section E, the linear motor 43, and the battery 34 are arranged in the Z direction (i.e., the up-down direction). In this embodiment, the distance L4 from the center of gravity G3 of the battery 34 to the center of gravity G2 of the linear motor 43 is greater (i.e., longer) than the distance L3 from the center of gravity G1 of the blade section E to the center of gravity G2 of the linear motor 43.

[0096] Furthermore, the distance L4 from the center of gravity G3 of the battery 34 to the center of gravity G2 of the linear motor 43 can be made approximately the same as the distance L3 from the center of gravity G1 of the blade part E to the center of gravity G2 of the linear motor 43. In this way, when the lower end side (more specifically, the bottom surface 111) of the base D is grasped by the fingers U22 with the palm U21 facing it, the center of gravity of the device body B can be positioned on the side closer to the palm U21 than to the fingertips. That is, the base D can be held with the center of gravity of the device body B in the hand U2.

[0097] Therefore, when using the electric razor A with the base D covered by hand U2, the shaking of the electric razor A can be further reliably suppressed, and the blade part E can be more easily brought into contact with the target position. That is, the operability of the electric razor A (more specifically, the device body B) can be further improved.

[0098] Furthermore, the distance L4 from the center of gravity G3 of the battery 34 to the center of gravity G2 of the linear motor 43 can be made smaller (i.e., shorter) than the distance L3 from the center of gravity G1 of the blade section E to the center of gravity G2 of the linear motor 43. This further improves the operability of the electric shaver A (more specifically, the device body B). Additionally, by minimizing the distance L4 from the center of gravity G3 of the battery 34 to the center of gravity G2 of the linear motor 43, the center of gravity of the device body B can be moved closer to the blade section E. This makes the electric shaver A (more specifically, the device body B) easier to operate.

[0099] Next, a general description of the structure of the device body B in this embodiment will be given.

[0100] Figure 11 This is a partially exploded view of the main body B of the electric razor A according to the embodiment. It is a perspective view obtained from the top of the front side after the outer blade assembly B2 has been removed from the housing B1. Figure 12 The figure shows the outer blade assembly B2 partially exploded in the embodiment. It is a perspective view obtained from the top of the front side after the outer blade box 50 has been removed from the upper base housing 15. Figure 13 This is a partially exploded view of the main body B of the electric razor A according to an embodiment. It is a perspective view obtained from the top of the front side, showing the base D (i.e., an example of the main body) broken down into the base main body 1 and the upper base outer shell 15, and the blade part E broken down into the outer blade box 50 and the mesh inner blade 512. (As shown) Figure 11 and Figure 13 As shown, the main body B of the device in this embodiment includes: a base D; and a blade part E, which is provided in the base D and is capable of cutting beard hair.

[0101] Additionally, the base D includes: a base body 1 having a lower base housing 10 that opens upwards; and an upper base housing 15 detachably mounted to the lower base housing 10, capable of holding a portion of the blade portion E (more specifically, the outer blade box 50). The lower base housing 10 and the upper base housing 15 can be formed, for example, using materials such as synthetic resin or metal.

[0102] In this embodiment, the lower base outer shell 10 is a bottomed cylindrical shape with an upward opening, including a peripheral wall 12. The peripheral wall 12 is formed such that its outer surface 12a is a curved surface protruding outwards. On the other hand, the upper base outer shell 15 is a cylindrical shape extending vertically, including a peripheral wall 151 with an upper opening 15a and a lower opening 15b. The peripheral wall 151 is also formed such that its outer surface 151a is a curved surface protruding outwards.

[0103] Furthermore, in this embodiment, when the upper base housing 15 is mounted on the lower base housing 10, the outer surface 12a of the peripheral wall 12 of the lower base housing 10 and the outer surface 151a of the peripheral wall 151 of the upper base housing 15 are approximately aligned with a smooth, continuous curved surface. That is, when the upper base housing 15 is mounted on the lower base housing 10, the outer surface 12a of the peripheral wall 12 of the lower base housing 10 and the outer surface 151a of the peripheral wall 151 of the upper base housing 15 each constitute a portion of a curved surface.

[0104] Furthermore, the outer surface 12a of the peripheral wall 12 of the lower base shell 10 and the outer surface 151a of the peripheral wall 151 of the upper base shell 15 constitute the outer surface D1a of the peripheral wall D1 of the base D.

[0105] Thus, in this embodiment, the appearance of the peripheral wall D1 of the base D (in this case, the shape of the outer surface D1a) is generally a smoothly curved shape with a central bulge. This makes the shape of the base D easy to hold by hand U2.

[0106] Specifically, in this embodiment, the user U grasps the outer surface D1a of the peripheral wall D1 of the base D with their finger U22, thereby being able to hold the electric razor A or the device body B with their hand U2. Therefore, in this embodiment, as... Figures 1-6 As shown, the outer surface D1a of the peripheral wall D1 of the base D becomes the gripping part D1b that the user U can hold with his hand U2 when using the electric razor A (i.e., when using the device body B).

[0107] In this embodiment, as described above, the lower end side (more specifically, the bottom surface 111) of the base D is positioned opposite the palm U21, and the outer surface D1a of the peripheral wall D1 of the base D is grasped with the fingers U22, thereby enabling the electric razor A or the device body B to be held by hand U2. Furthermore, the size of the base D is set such that, when held by a typical adult male hand, the fingertips are located near the skin contact surface 5a of the blade portion E (e.g., the base D).

[0108] Therefore, when an average adult male holds the electric razor A or the main body B with his hand U2, he grasps the upward and inward-sloping portion of the outer surface D1a with his fingers U22. Specifically, he grasps the upward and inward-sloping portion of the outer surface D1a on one side in the X direction (i.e., the second direction, the front-back direction, and the shaving direction) with his thumb, and grasps the upward and inward-sloping portion of the outer surface D1a on the other side in the X direction with his fingers other than his thumb. Thus, when the lower end side of the base D (more specifically the bottom surface 111) is opposite the palm U21 and the outer surface D1a of the peripheral wall D1 of the base D is grasped with his fingers U22, the upward and inward-sloping portion of the outer surface D1a is held between his thumb and other fingers on both sides in the X direction.

[0109] In this way, the user U grasps the base D with a force that moves the electric shaver A or the device body B toward the palm U21. Therefore, for example, even when using the electric shaver A or the device body B, the user grips the base D with a large force using the thumb and other fingers, causing the base D to move toward the palm U21 (i.e., causing the electric shaver A or the device body B to move toward the palm U21), thus maintaining the state in which the base D is housed in the palm U21.

[0110] Thus, in this embodiment, by setting the shape of the base D to prevent the electric razor A or the device body B from falling from the hand U2, it becomes a shape that is easy to hold with the hand U2.

[0111] Furthermore, in this embodiment, by making the external shape of the base D (more specifically, the outer surface shape of the peripheral wall portion of the base D) into a shape that is smoothly curved as a whole, the design (i.e., appearance) of the electric razor A (more specifically, the device body B and the base D) can also be improved.

[0112] In addition, a cavity is formed inside the lower base housing 10, and various electrical components such as the battery 34 are housed in the cavity formed inside the lower base housing 10.

[0113] In this embodiment, the base body 1 includes a waterproof unit 2 (for example, refer to...). Figure 14 and Figure 15 The waterproof space S3 formed inside the waterproof unit 2 on the main body side (i.e., an example of a waterproof space, for example, refer to...) Figure 18 The device body B (i.e., an element of the electric shaver A) houses various electrical components, including a battery 34. Furthermore, by placing this waterproof unit 2 within a cavity formed inside the lower base housing 10, the battery 34 and other electrical components are housed within this cavity. This gives the device body B (i.e., an element of the electric shaver A) a waterproof function.

[0114] On the other hand, the blade portion E is detachably held against the peripheral wall 151 of the upper base housing 15. In this embodiment, a blade unit 5 having the blade portion E is formed, and the blade unit 5 is detachably mounted against the peripheral wall 151 of the upper base housing 15, thereby detachably holding the blade portion E against the peripheral wall 151 of the upper base housing 15. At this time, the blade unit 5 is held against the peripheral wall 151 of the upper base housing 15 with a portion of the blade portion E partially exposed to the outside. In this way, the part of the blade portion E exposed to the outside of the peripheral wall 151 of the upper base housing 15 functions as the skin contact surface 5a that comes into contact with the skin U1 of the user U when using the electric shaver A (i.e., an example of a hair removal device) (i.e., when using the device body B).

[0115] Next, the specific structure of blade unit 5 will be described.

[0116] like Figures 11-13 As shown, the blade unit 5 includes 5 blade assemblies and an outer blade housing 54. The 5 blade assemblies are arranged in the X direction such that their length direction is aligned with the Y direction.

[0117] Thus, in this embodiment, each blade assembly has a predetermined length and width, and the blade assembly is configured such that its length direction is approximately aligned with the Y direction (i.e., the first direction and the left-right direction) of the electric razor A and its width direction is approximately aligned with the X direction (i.e., the second direction, the front-back direction and the shaving direction) of the electric razor A.

[0118] In this embodiment, the five blade assemblies consist of two mesh blade assemblies 51, two fine shaving mesh blade assemblies 52, and one slit blade assembly 53.

[0119] Furthermore, the mesh blade assembly 51 primarily functions to cut beard hairs in a sloping state (i.e., an example of body hair) and beard hairs in a shorter, upright state (i.e., an example of body hair). Additionally, the fine shaving mesh blade assembly 52 primarily functions to perform a deep shave that cuts beard hairs (i.e., an example of body hair) to a shorter depth. And, the slit blade assembly 53 primarily functions to cut finer, longer beard hairs (i.e., an example of body hair).

[0120] In this embodiment, such as Figure 11 As shown, a slit blade assembly 53 is positioned at the center in the X direction, and two mesh blade assemblies 51 are positioned near both sides of the slit blade assembly 53. Furthermore, two fine shaving mesh blade assemblies 52 are positioned near the two mesh blade assemblies 51. That is, the two fine shaving mesh blade assemblies 52 are positioned at both ends in the X direction, sandwiching the two mesh blade assemblies 51 and one slit blade assembly 53 in the middle.

[0121] like Figure 13 As shown, each mesh blade assembly 51 includes a mesh blade 511 and a mesh inner blade 512. In this embodiment, the mesh blade 511 is formed in an inverted U-shape, protruding upwards when viewed from the side (i.e., when viewed along the Y direction).

[0122] Furthermore, the mesh blade 511 is formed with a slight curve in the Y direction (i.e., the length direction of the outer blade) in a manner that protrudes upwards when viewed from the front (i.e., when viewed along the X direction). Also, the mesh blade 511 has, for example, a plurality of circular blade holes (not shown). Alternatively, the mesh blade 511 can be configured not to be curved upwards when viewed from the front. For example, it can be configured such that, when viewed from the front (i.e., when viewed along the X direction), the top of the mesh blade 511 becomes a straight line extending in the Y direction (i.e., the length direction of the outer blade).

[0123] The inner mesh blade 512 is shaped like an inverted U, following the curved shape of the mesh blade 511, and is positioned inside the mesh blade 511 (more specifically, on the underside of the mesh blade 511, and even more specifically, on the opposite side of the mesh blade 511 that contacts the skin). For example... Figure 37 As shown, two mesh inner blades 512 are detachably mounted on a pair of drive members 4324. At this time, the two mesh inner blades 512 are detachably mounted on the pair of drive members 4324 while being subjected to an upward force. Furthermore, when the power to the electric razor A is turned on to drive the drive members 4324 with the mesh inner blades 512 mounted on the drive members 4324 and positioned inside the mesh blades 511, the mesh inner blades 512 slide in contact with the inner surface of the mesh blades 511 while simultaneously undergoing relative displacement (i.e., relative movement, more specifically, reciprocating motion in the Y direction) relative to the mesh blades 511.

[0124] like Figure 37 As shown, each fine shaving mesh blade assembly 52 includes a fine shaving mesh blade 521 and a fine shaving mesh inner blade 522. In this embodiment, the fine shaving mesh blade 521 is formed in an inverted U-shape, protruding upwards when viewed from the side (i.e., viewed along the Y direction).

[0125] Furthermore, the fine shaving blade 521 is formed with a slight curve in the Y direction (i.e., the length direction of the outer blade) in a manner that protrudes upwards when viewed from the front (i.e., when viewed along the X direction). Also, the fine shaving blade 521 has, for example, a plurality of circular blade holes (not shown). Alternatively, the fine shaving blade 521 can be configured so that it does not protrude upwards when viewed from the front. For example, it can be configured such that, when viewed from the front (i.e., when viewed along the X direction), the top of the fine shaving mesh blade 521 becomes a straight line extending in the Y direction (i.e., the length direction of the outer blade).

[0126] Furthermore, in this embodiment, the blade width in the X direction (i.e., the front-to-back direction) of the fine shaving mesh blade 521 is smaller than the blade width in the X direction (i.e., the front-to-back direction) of the mesh blade 511. This makes the blade width of the fine shaving mesh blade 521 smaller than that of the mesh blade 511, that is, it sets a smaller radius of curvature for the fine shaving mesh blade 521, thereby allowing the skin pressed against the surface to protrude significantly inward from the blade hole, resulting in a shorter shave.

[0127] The fine shaving inner blade 522 is shaped like an inverted U, following the curved shape of the fine shaving inner blade 521, and is positioned inside the fine shaving inner blade 521 (more specifically, on the underside of the fine shaving inner blade 521, and even more specifically, on the opposite side of the fine shaving inner blade 521 that contacts the skin). For example... Figure 37 As shown, two fine shaving inner mesh blades 522 are detachably mounted on drive pins 4326 and 4327, which are respectively connected to a pair of drive members 4324. At this time, the two fine shaving inner mesh blades 522 are detachably mounted on drive pins 4326 and 4327 with an upward force applied. Furthermore, when the power supply of the electric razor A is turned on to drive drive pins 4326 and 4327 with the two fine shaving inner mesh blades 522 respectively mounted on drive pins 4326 and 4327 and disposed inside the fine shaving mesh blade 521, and the drive pins 4326 and 4327 are driven, each fine shaving inner mesh blade 522 slides in contact with the inner surface of the fine shaving mesh blade 521 while being relatively displaced relative to the fine shaving mesh blade 521 (i.e., relatively moved, more specifically, reciprocated in the Y direction).

[0128] like Figure 37 As shown, the slit blade assembly 53 includes an outer slit blade 531 and an inner slit blade 532. In this embodiment, the outer slit blade 531 is formed in an inverted U-shape, protruding upwards in a side view (i.e., viewed along the Y direction). That is, the outer slit blade 531 has a generally flat top surface.

[0129] Furthermore, the outer slit blade 531 is formed with a slight curve in the Y direction (i.e., the length direction of the outer blade) in a manner that protrudes upward when viewed from the front (i.e., when viewed along the X direction). Also, multiple slit-shaped blade holes extending in the X direction are formed in a manner where the outer slit blade 531 is arranged separately in the Y direction. Alternatively, the outer slit blade 531 can be configured not to be curved upward when viewed from the front. For example, it can be configured such that, when viewed from the front (i.e., when viewed along the X direction), the top of the outer slit blade 531 becomes a straight line extending in the Y direction (i.e., the length direction of the outer blade). That is, the outer slit blade 531 can be formed such that the top surface of the outer slit blade 531 is a flat surface (i.e., a horizontal surface).

[0130] The inner slit blade 532 is shaped like an inverted U, curving along the outer slit blade 531, and is positioned inside the outer slit blade 531 (more specifically, on the underside of the outer slit blade 531, and even more specifically, on the opposite side of the outer slit blade 531 that contacts the skin). For example... Figure 37 As shown, the inner slit blade 532 is detachably mounted on a drive member 4325 connected to one of a pair of drive members 4324 (i.e., a different drive member from the one that mounts the mesh inner blade 512). At this time, the inner slit blade 532 is detachably mounted on the drive member 4325 (i.e., a different drive member from the one that mounts the mesh inner blade 512) while being subjected to an upward force. Furthermore, when the power to the electric razor A is turned on to drive the drive member 4325 with the inner slit blade 532 mounted on the drive member 4325 and positioned inside the outer slit blade 531, the inner slit blade 532 slides in contact with the inner surface of the outer slit blade 531 while simultaneously displacing relative to the outer slit blade 531 (i.e., relative movement, more specifically, reciprocating motion in the Y direction).

[0131] Thus, the electric razor A of this embodiment has the form of a reciprocating electric razor in which the inner mesh blade 512, the fine shaving inner mesh blade 522, and the slit inner blade 532 reciprocate relative to the mesh blade 511, the fine shaving mesh blade 521, and the slit outer blade 531, respectively. Therefore, in this embodiment, the blade section E includes five outer blades (i.e., two mesh blades 511, two fine shaving mesh blades 521, and one slit outer blade 531) and five inner blades (i.e., two mesh inner blades 512, two fine shaving mesh inner blades 522, and one slit inner blade 532).

[0132] Furthermore, in this embodiment, the components of the five blade assemblies, excluding the two inner mesh blades 512, are mounted on the generally frame-shaped outer blade housing 54. In this case, each component can be detachably mounted on the outer blade housing 54, or it can be mounted on the outer blade housing 54 in a non-detachable state. Alternatively, the structure can be configured such that all components including the two inner mesh blades 512 (i.e., the five blade assemblies) are mounted on the generally frame-shaped outer blade housing 54.

[0133] In this embodiment, the two mesh blade assemblies 51, the two fine shaving mesh blade assemblies 52, and the slit blade assembly 53 are mounted on the outer blade housing 54 in a state that allows them to float in the Z-direction (i.e., the vertical direction). This way, when the upper base housing 15, on which the outer blade box 50 is mounted, is attached to the base body 1, each blade assembly floats independently relative to the base body 1. Alternatively, the structure can be configured such that no one or more of the two mesh blade assemblies 51, the two fine shaving mesh blade assemblies 52, and the slit blade assembly 53 floats in the Z-direction (i.e., the vertical direction).

[0134] Furthermore, in this embodiment, the fine shaving mesh blade assembly 52 includes a roller 523 as a skin protection member, which is disposed between the mesh blade 511 and the fine shaving mesh blade 521. When using the device body B, the roller 523 is brought into contact with the skin U1, thereby effectively preventing the skin U1 from pressing forcefully against the fine shaving mesh blade 521, which has a small radius of curvature.

[0135] Moreover, in this embodiment, such as Figure 11 and Figure 13 As shown, the two mesh blades 511 can be mounted on the outer blade housing 54 without the inner mesh blade 512 being positioned inside. On the other hand, as... Figure 13 and Figure 37 As shown, two fine shaving mesh blades 521 are mounted on the outer blade housing 54 with the fine shaving mesh inner blade 522 disposed inside, and one slit outer blade 531 is mounted on the outer blade housing 54 with the slit inner blade 532 disposed inside. Thus, in this embodiment, two mesh blades 511, two fine shaving mesh blade assemblies 52, and one slit blade assembly 53 are mounted on the outer blade housing 54 to form an outer blade box 50. Furthermore, this outer blade box 50 can be detachably mounted on the upper base housing 15.

[0136] Specifically, such as Figures 11-13As shown, the upper base housing 15 includes a generally cylindrical peripheral wall 151 with an upper opening 15a and a lower opening 15b. The outer blade holder 50, with each outer blade facing upwards, is inserted into the upper base housing 15 through the lower opening 15b side, thereby mounting the outer blade holder 50 to the upper base housing 15. At this time, the outer blade holder 50 is mounted to the upper base housing 15 in a state where the surface of each outer blade is exposed from the upper opening 15a. Therefore, in this embodiment, the portion of the surface of each outer blade exposed from the upper opening 15a of the upper base housing 15 becomes the portion of the blade portion E exposed to the outside of the base D. That is, the portion of the surface of each outer blade exposed from the upper opening 15a of the upper base housing 15 becomes the skin contact surface 5a that contacts the skin U1 (i.e., the skin surface) of the user U.

[0137] Furthermore, release buttons 541 are formed at both ends of the outer blade housing 54. By operating the release buttons 541, the installation of the upper base housing 15 and the outer blade box 50 can be released.

[0138] Specifically, the release button 541 includes: an elastic piece 5411, which extends outward and downward from the main body of the outer blade housing 54 in the Y direction and is capable of elastic deformation in the Y direction; a locking hole 5412, which is formed in the center of the elastic piece 5411 in a through manner in the Y direction; and an operating part 5413, which is formed in a manner protruding outward from the lower end of the elastic piece 5411 in the Y direction.

[0139] In addition, the peripheral wall 151 of the upper base shell 15 includes a front wall 1511, a rear wall 1512, and a pair of side walls 1513 connecting the front wall 1511 and the rear wall 1512. Furthermore, a notch 15131 opening downwards is formed at the lower end of the central portion of the pair of side walls 1513 in the X direction.

[0140] Furthermore, a locking protrusion 15132 is formed at the lower end of the central portion of a pair of sidewalls 1513 in the X direction. The locking protrusion 15132 protrudes inward in the Y direction and can be detachably locked into the locking hole 5412.

[0141] In this way, when the outer blade housing 50 is inserted from the lower opening 15b side of the upper base housing 15, the top end of the engaging protrusion 15132 protruding inward from the upper base housing 15 engages from the outside with the engaging hole 5412 of the elastic piece 5411 of the outer blade housing 54. At this time, as Figure 36 As shown, the operating part 5413 is housed in the notch 15131 in a state where the top end protrudes to a position on the outer side of the outer surface 151a of the peripheral wall 151 in the Y direction.

[0142] Furthermore, in this embodiment, the operating portion 5413 of the release button 541 is configured such that, with the outer blade box 50 installed on the upper base housing 15, its top protrudes to a position outside the outer side surface (more specifically, the outer surface 151a of the peripheral wall 151) of the upper base housing 15. Therefore, by gripping the operating portion 5413 of the release button 541 from the left and right and inserting it inward, the elastic piece 5411 flexes inward, thereby releasing the engagement between the engaging protrusion 15132 and the engaging hole 5412, thus allowing the outer blade box 50 to be removed from the upper base housing 15.

[0143] As explained above, in this embodiment, with the two mesh inner blades 512 respectively mounted on the drive member 4324 protruding upwards from the base body 1, the upper base housing 15 on which the outer blade box 50 is mounted is mounted on the base body 1. Furthermore, with the two mesh inner blades 512 respectively mounted on the drive member 4324, when the upper base housing 15 on which the outer blade box 50 is mounted is mounted on the base body 1, the two mesh inner blades 512 are positioned inside the corresponding mesh blade 511.

[0144] That is, in this embodiment, the housing B1 is formed by mounting two mesh inner blades 512 onto the drive member 4324 protruding upwards from the base body 1. Furthermore, the outer blade box 50 is mounted onto the upper base housing 15 to form the outer blade assembly B2. And, by detachably mounting the outer blade assembly B2 onto the housing B1, the device body B is formed.

[0145] Figure 28 This is an exploded perspective view of the upper unit 4 obtained from the top of the front side in the embodiment. Figure 29 This is an exploded perspective view of the upper unit 4 taken from below the rear side in the embodiment. In this embodiment, release buttons 44 are formed at both ends of the base body 1. By operating the pair of release buttons 44, the installation of the housing B1 and the outer blade assembly B2 is released.

[0146] Specifically, such as Figure 28 and Figure 29 As shown, the pair of release buttons 44 each include: a main body 441; a shaft 442 formed in the center of the inner side of the main body in a manner that protrudes inward in the Y direction (i.e., the width direction); and a coil spring 443 inserted into the shaft 442 to exert force on the outer side of the main body 441 in the Y direction (i.e., the width direction).

[0147] And, as Figure 28 , Figure 29 as well as Figure 36As shown, each release button 44 has an engaging hook 4411 protruding upwards on its main body 441, and engaging hooks 15133 are formed at the lower end of the central portion of each pair of sidewalls 1513 in the X direction. These engaging hooks 15133 protrude inwards in the Y direction and are detachably engaged with the engaging hook 4411. In this embodiment, the hook portion 44111 of the engaging hook 4411 protrudes outwards in the Y direction (i.e., the width direction), and the engaging hook 15133 protrudes inwards in the Y direction (i.e., the width direction). Furthermore, by applying force to the main body 441 in the Y direction (i.e., the width direction) by the coil spring 443, the engaging hooks 4411 and 15133 can be more securely engaged.

[0148] Furthermore, in this embodiment, with the coil spring 443 inserted into the shaft portion 442, the top end of the coil spring 443 abuts against the spring receiving portion 41232 formed on the side wall 4123 of the upper housing 41, and the main body portion 441 is held protrudingly and submerged in the mounting / removing button holding portion 41231 formed on the side wall 4123 of the upper housing 41 under a force applied in the Y direction (i.e., the width direction). Additionally, the operating portion of the main body portion 441 is inserted into the notch 1231 formed on the side wall 123 of the lower base housing 10 (see reference). Figure 14 ).

[0149] In this way, the release button 44 is installed at both ends of the base body 1 in a state where the main body 441 is subjected to force in the Y direction (i.e., the width direction) by the coil spring 443, so that it can protrude and be inserted in the Y direction (i.e., the width direction).

[0150] Furthermore, if the outer blade assembly B2 covers the housing B1 from above while the two inner mesh blades 512 are positioned inside the corresponding inner mesh blades 511, the two fine shaving inner mesh blades 522 are respectively installed on the drive pins 4326 and 4327, and a slit inner blade 532 is installed on the drive member 4325, then the hook portion 44111 of the engaging hook 4411 is pressed by the engaging hook 15133, and the main body portion 441, which is exerted with force outward in the Y direction (i.e., the width direction), overcomes the force exerted by the coil spring 443 and moves inward in the Y direction (i.e., the width direction). At this time, the engaging hook 4411 (more specifically, the hook portion 44111) integrally formed on the main body portion 441 also moves inward in the Y direction (i.e., the width direction) together with the main body portion 441. Furthermore, in this state, if the outer blade assembly B2 is pressed further toward the housing B1, the engaging hook 15133 moves to a position lower than the hook portion 44111 of the engaging hook 4411, and the engaging hook 15133 and the hook portion 44111 engage. At this time, the hook portion 44111 is engaged with the engaging hook 15133 under the force exerted by the coil spring 443 in the Y direction (i.e., the width direction). In this way, the outer blade assembly B2 is installed on the housing B1.

[0151] Furthermore, with the outer blade assembly B2 installed in the housing B1, the main body 441 of the release button 44 is gripped from the left and right and inserted inward, thereby causing the locking hook 4411 (more specifically, the hook portion 44111) and the main body 441 to move together in the Y direction (i.e., the width direction), releasing the engagement between the locking hook 15133 and the hook portion 44111, thereby enabling the outer blade assembly B2 to be removed from the housing B1.

[0152] In this embodiment, with the two inner mesh blades 512 respectively mounted on a pair of drive members 4324, the outer blade assembly B2 can be removed from the housing B1. Furthermore, the two inner mesh blades 512 can be detachably mounted on the pair of drive members 4324 while being subjected to upward force. Thus, when the release button 44 is operated to disengage the engagement between the locking hook 15133 and the hook portion 44111, the outer blade assembly B2 is pushed upward by the force of the two inner mesh blades 512, allowing the outer blade assembly B2 to be smoothly removed from the housing B1.

[0153] Furthermore, it is preferable to provide a spring-loaded mechanism by placing one or more (more specifically, one or more sets of) push-up members that push the outer blade housing upwards between the housing and the outer blade housing when all blade assemblies (i.e., all outer blades and all inner blades) are mounted on the outer blade housing. For example, the push-up members that push the outer blade housing upwards can be force-applying mechanisms such as helical springs, or sets of magnets that generate magnetic repulsion (e.g., a pair of magnets arranged with like poles facing each other). Thus, by providing a spring-loaded mechanism between the housing and the outer blade housing, the outer blade assembly can be smoothly removed from the housing even when the outer blade assembly is formed by mounting all blade assemblies (i.e., all outer blades and all inner blades) on the outer blade housing.

[0154] Furthermore, when the power supply to the main body B of the device (i.e., an element of the electric razor A) is turned on, each inner blade is displaced relative to the corresponding outer blade (i.e., relative movement, more specifically, reciprocating motion in the Y direction).

[0155] In this way, with the outer blade assembly B2 installed in the housing B1, the power supply to the main body B of the device (i.e., an element of the electric shaver A) is turned on, so that the inner blades are in a state of relative displacement with respect to the corresponding outer blades, causing the skin contact surface 5a of the blade unit 5 to contact the skin U1 (i.e., the skin surface) of the user U and to move while sliding in the X direction, thereby using the outer and inner blades to cut the beard (i.e., an example of hair) inserted into the blade hole of each outer blade.

[0156] Furthermore, when the outer blade assembly B2 is installed on the housing B1 to assemble the main body B of the device, a space is formed inside the outer blade assembly B2, which can store the beard (i.e., hair) cut by the outer blade and the inner blade.

[0157] Thus, in this embodiment, by using a reciprocating electric razor A, miniaturization in the front-to-back direction (i.e., the depth direction and the reciprocating motion direction of the inner blade) can be achieved, and a larger cutting area for beards (i.e., hair) can be ensured.

[0158] In addition, in this embodiment, as described above, the skin contact surface 5a of the blade part E is composed of the surface of the outer blade of a plurality of blade assemblies (more specifically, the outer surface), and the whole becomes a surface that can approximate a curved surface that protrudes outward.

[0159] Furthermore, when the main body B of the device is raised independently, the outermost protruding point of the curved surface of the skin contact surface 5a of the blade part E is located at the top, and the cross-section at the outermost protruding point of the curved surface of the skin contact surface 5a of the blade part E becomes a horizontal plane.

[0160] Thus, in this embodiment, with the device body B positioned such that the blade portion E is at the top and the base portion D is at the bottom, and the extending direction of the base portion D is approximately aligned with the vertical direction, the skin contact surface 5a of the blade portion E is exposed upwards. Therefore, with the device body B positioned such that the blade portion E is at the top and the base portion D is at the bottom, and the extending direction of the base portion D is approximately aligned with the vertical direction, each inner blade reciprocates linearly relative to its corresponding outer blade in the horizontal direction.

[0161] Therefore, in this embodiment, when the device body B is arranged with the blade portion E at the top and the base portion D at the bottom, and the extension direction of the base portion D is approximately aligned with the vertical direction, the driving surface of the inner blade becomes a surface approximately parallel to the horizontal plane.

[0162] Alternatively, the structure can be configured such that the main body B of the device is positioned with the blade part E at the top and the base part D at the bottom, and the extension direction of the base part D is approximately aligned with the vertical direction, so that the skin contact surface 5a is tilted relative to the horizontal plane.

[0163] For example, the structure can be configured such that, with the blade portion E at the top and the base portion D at the bottom, and the extension direction of the base portion D being approximately aligned with the vertical direction, the portion of the blade portion E that contacts the skin U1 (more specifically, the skin contact surface 5a) is tilted forward and downward relative to the horizontal surface. In this way, when the device body B (i.e., an element of the electric razor A) is used with the base portion D covered by the hand U2 from the bottom side, the skin contact surface 5a can easily contact the user U's skin U1.

[0164] Furthermore, such a structure can be formed either by directly mounting the blade portion E on the base D (i.e., an example of the main body portion), or by having the base D with a head and mounting the blade portion E on that head.

[0165] Next, the specific structure of the waterproof base body 1 will be described.

[0166] Figure 14 The figure shows the base body 1 partially exploded in the embodiment. It is a perspective view obtained from the top of the front side after the waterproof unit 2, the switch button 13 and the USB cover 14 have been removed from the lower base shell 10. Figure 15 This is a partially exploded view of the base body 1 in this embodiment, a perspective view obtained from the lower rear side after the waterproof unit 2, switch button 13, and USB cover 14 have been removed from the lower base housing 10. In this embodiment, as... Figure 14 and Figure 15As shown, the base body 1 includes a lower base shell 10 and a waterproof unit 2 disposed in the cavity of the lower base shell 10.

[0167] In this embodiment, the lower base shell 10 includes a rectangular plate-shaped bottom wall 11 with rounded corners and a peripheral wall 12 continuously arranged from the outer periphery of the bottom wall 11 upwards. The lower base shell 10 is a rectangular bottomed cylinder with rounded corners.

[0168] In addition, such as Figure 15 As shown, a through hole 112 is formed at the center of the Y direction (i.e., the width direction) at the front end of the bottom wall 11 in the X direction (i.e., the front-to-back direction), and the through hole 112 is blocked by a switch button 13 (i.e., an example of an operating member).

[0169] In this embodiment, the switch button 13 is mounted on the bottom wall 11 in a state that allows it to move in the through-hole 112's through-direction (i.e., the thickness direction of the bottom wall 11). Furthermore, by pressing the switch button 13, the power supply to the device body B (i.e., an element of the electric shaver A) is switched on and off.

[0170] Thus, in this embodiment, when the blade portion E is located at the top and the base portion D is located at the bottom, a switch button 13 (i.e., an example of an operating member) is formed on the bottom wall 11 of the base portion D, which is configured to switch the power supply on and off.

[0171] This allows for more reliable suppression of accidental operation of the switch button 13 while holding the peripheral wall D1 of the base D.

[0172] Furthermore, in this embodiment, a push-button switch 13 is used as an operating device for switching the power supply on and off, but other operating devices can also be used. For example, it can be a mechanical switch other than a sliding switch, an electrostatic sensor, or a pressure-sensitive sensor.

[0173] In addition, in this embodiment, such as Figures 36-40 As shown, the bottom wall 11 is curved in an upward convex shape, and the bottom surface 111 is a concave curved surface that is also curved in an upward convex shape. Furthermore, when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a with the bottom wall 11 on the lower side, only the peripheral portion 111a of the bottom surface 111 contacts the mounting surface 7a.

[0174] In this way, such as Figures 36-40As shown, when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a with the bottom wall 11 facing downwards, a second space S2 is formed between the bottom surface 111 (i.e., an element of the bottom wall 11) and the mounting surface 7a. This second space S2 is the space defined by the bottom surface 111 and the mounting surface 7a when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a with the bottom wall 11 facing downwards.

[0175] Furthermore, in this embodiment, when the switch button 13 is installed on the bottom wall 11 in a state where it is not pressed inward, the outer surface 131 of the switch button 13 is approximately coplanar with the bottom surface 111. As a result, when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a, a gap is formed between the outer surface 131 and the mounting surface 7a.

[0176] This allows for more reliable suppression of the following situation: when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a, the outer surface 131 of the switch button 13 (i.e., an example of the operating element) interferes with the mounting surface 7a. In other words, it allows for more reliable suppression of the following situation: when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a, the switch button 13 (i.e., an example of the operating element) is operated due to the mounting surface 7a.

[0177] Thus, in this embodiment, it is possible to suppress the switching of power supply on and off while the peripheral wall D1 of the base D is being held, and it is also possible to suppress the switching of power supply on and off while the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a. That is, it is possible to more reliably suppress the accidental operation of the switch button 13 (i.e., an example of an operating member).

[0178] Furthermore, in this embodiment, the second space S2 formed between the bottom surface 111 (i.e., an element of the bottom wall 11) and the mounting surface 7a becomes a non-enclosed space. Specifically, as... Figure 40As shown, by forming a notch 114 in the bottom wall 11 to divide the periphery 111a, the second space S2 is connected to the external space via a connecting hole S2a defined by the notch 114 and the mounting surface 7a when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a. Thus, the second space S2 becomes a non-enclosed space. Furthermore, in this embodiment, a structure in which the connecting hole S2a connects to the outlet S4a is exemplified from a design perspective, but the embodiment is not limited to such a structure. For example, the connecting hole S2a may be formed at only one location where it does not connect to the outlet S4a. Alternatively, the connecting hole S2a may be formed at two or more locations. In this case, it is possible to have a connecting hole S2a that connects to the outlet S4a, or not to have a connecting hole S2a that connects to the outlet S4a.

[0179] Thus, if the second space S2 is set as an open space, the drying performance of the device body B (i.e., an element of the electric razor A) can be further improved. For example, even when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a with a liquid such as water adhering to the bottom wall 11, the bottom wall 11 can be dried more quickly.

[0180] Furthermore, in this embodiment, a through hole 113 (i.e., an example of a press-fit hole) is formed on one side of the through hole 112 in the Y direction (i.e., the width direction) at the bottom wall 11. When the waterproof unit 2 is disposed in the cavity of the lower base housing 10, the through hole 113 (i.e., an example of a press-fit hole) and the press-fit hole 3112 formed in the bottom wall 311 of the lower housing 31 of the waterproof unit 2 (see reference) Figure 17 Connect.

[0181] Furthermore, with the waterproof unit 2 disposed within the cavity of the lower base housing 10 and the through hole 113 (i.e., an example of a press-in hole) and the press-in hole 3112 connected, the rivet 91 (i.e., an example of a press-in member, see below) is inserted from below. Figure 15 The waterproof unit 2 is pressed into the through hole 113 (i.e., an example of a press-in hole) and the press-in hole 3112, thereby fixing the waterproof unit 2 to the lower base housing 10.

[0182] Furthermore, in this embodiment, ribs 120 are formed at the four corners inside the peripheral wall 12, and threaded holes 120a are formed in these ribs 120 (see reference). Figure 14 When the waterproof unit 2 is disposed in the cavity of the lower base housing 10, the threaded hole 120a and the threaded hole 41241 formed by the threaded hole 41241 of the flange portion 4124 of the upper housing 41 (described later) of the waterproof unit 2 (see reference) Figure 28 ) and the threaded hole 4211 formed in the top wall body 421 of the top wall 42 (refer to Figure 28 Connect.

[0183] Furthermore, with the waterproof unit 2 disposed in the cavity of the lower base housing 10 and the threaded hole 120a connected to the threaded hole 41241 and the threaded hole 4211, the screw 92 is inserted from above into the threaded hole 4211, the threaded hole 41241 and the threaded hole 120a, thereby fixing the waterproof unit 2 to the lower base housing 10.

[0184] Additionally, the peripheral wall 12 includes a front wall 121, a rear wall 122, and a pair of side walls 123 connecting the front wall 121 and the rear wall 122.

[0185] Furthermore, a through hole 1211 is formed at the center of the lower end of the front wall 121 in the Y direction (i.e., the width direction) (see reference). Figure 3 In this embodiment, as described above, the appearance of the peripheral wall D1 of the base D (in this case, the shape of the outer surface D1a) is generally a smoothly curved shape with a central bulge. Therefore, the lower end of the front wall 121 becomes an inclined surface that slopes downwards and inwards, and the through hole 1211 is located further forward than the front end of the bottom wall 11. Thus, as... Figure 37 As shown, when the device body B (i.e., an element of the electric razor A) is placed on the mounting surface 7a, the through hole 1211 can be opposite to the mounting surface 7a without being obstructed by the bottom wall 11.

[0186] Furthermore, in this embodiment, as Figure 37 As shown, the top end of the light guide portion 323 (i.e., an example of the display portion) is inserted into the through hole 1211.

[0187] Thus, in this embodiment, with the blade portion E located at the top and the base portion D at the bottom, a light guide portion 323 (i.e., an example of a display portion) is formed at the connection portion connecting the peripheral wall 12 of the base portion D to the bottom wall 11. This light guide portion 323 (i.e., an example of a display portion) is provided to notify the user U or others of the status of the device body B. For example, it can notify the user U or others that the device body B is powered on, is charging the battery 34, etc., by the color of the illuminated light and the method of light illumination (e.g., always on, flashing, etc.).

[0188] Furthermore, if a light guide portion 323 (i.e., an example of a display portion) is formed at the connection between the peripheral wall 12 of the base D and the bottom wall 11, then the light guide portion 323 (i.e., an example of a display portion) is formed in a less conspicuous part of the base D. Therefore, the appearance of the device body B (i.e., an element of the electric razor A) can be improved, and the light guide portion 323 (i.e., an example of a display portion) can also be visually identified.

[0189] For example, when the device body B (i.e., an element of the electric shaver A) is placed on the mounting surface 7a with the light guide 323 (i.e., an example of the display section) emitting light, the light emanating from the light guide 323 (i.e., an example of the display section) is reflected on the mounting surface 7a, so the user U and others can check the condition of the device body B by observing the reflected light. Furthermore, when no light is emanating from the light guide 323 (i.e., an example of the display section), the light guide 323 (i.e., an example of the display section) becomes inconspicuous, thus preventing a decrease in aesthetic appeal when the electric shaver A is used as interior decoration in a room.

[0190] Moreover, in this embodiment, such as Figure 37 As shown, a light guide 323 (i.e., an example of a display unit) is formed near the switch button 13 (i.e., an example of an operating member). This allows for easy visual identification of the light emanating from the light guide 323 (i.e., an example of a display unit) when the switch button 13 (i.e., an example of an operating member) is operated. In other words, it makes it easier to confirm the operating state (e.g., energized state) of the switch button 13 (i.e., an example of an operating member).

[0191] In addition, in this embodiment, such as Figure 14 and Figure 15 As shown, a through hole 1221 is formed in the center of the rear wall 122, allowing the USB terminal 3332 (i.e., an example of the charging unit) described later to be exposed to the outside. Furthermore, a USB cover 14 (i.e., an example of a cover) that can be opened and closed to block the through hole 1221 is held in place in the base body 1 in an anti-detachment state. Moreover, when the through hole 1211 is blocked by the USB cover 14, the USB cover 14 (i.e., an example of a cover) can be used to protect the USB terminal 3332 (i.e., an example of the charging unit, see reference 1) in a waterproof state. Figure 17 ).

[0192] Specifically, the USB cover 14 includes a cover body 141 capable of opening and closing to block the through hole 1221, and a connecting piece 142 connected to the cover body 141. Furthermore, a waterproof cover 1412 is formed on the inner side of the cover body 141, which is inserted into the top of the USB terminal 3332 (i.e., an example of the charging unit) and can seal the USB terminal 3332 (i.e., an example of the charging unit).

[0193] Furthermore, when the cover body 141 blocks the through hole 1221 in a way that allows it to be opened and closed, the tip of the USB terminal 3332 (i.e., an example of the charging unit) is inserted into the interior of the waterproof cover 1412, and the USB terminal 3332 (i.e., an example of the charging unit) is sealed by the waterproof cover 1412. In this way, the USB terminal 3332 (i.e., an example of the charging unit) can be protected in a waterproof state by using the USB cover 14.

[0194] In addition, in this embodiment, the anti-detachment hook 1421 is formed at the top of the connecting piece 142 in a forward-protruding manner, and the hook 1421 is housed in the receiving recess 31221 formed in the rear wall 3122 of the lower outer casing 31 (see reference). Figure 19 In this state, the USB cover 14 remains attached to the base body 1. Furthermore, as... Figure 37 As shown, when the waterproof unit 2 is disposed within the cavity of the lower base housing 10, the opening formed above the receiving recess 31221 in the rear wall 3122 of the lower housing 31 and the rear wall 122 of the lower base housing 10 becomes narrower. In this embodiment, the opening formed above the receiving recess 31221 is formed to be slightly wider than the thickness of the connecting piece 142. In this way, the connecting piece 142 can move up and down, but the hook 1421 cannot move to a position higher than the receiving recess 31221, and the USB cover 14, which can be opened and closed to block the through hole 1221, can be held in a non-detached state in the base body 1.

[0195] Furthermore, in this embodiment, with the through hole 1221 blocked by the cover body 141, the outer surface 1411 of the cover body 141 is approximately coplanar with the outer surface 12a of the peripheral wall 12. This prevents the finger U22 from getting stuck in the cover body 141 when using the device body B (i.e., an element of the electric razor A), further improving operability when using the device body B (i.e., an element of the electric razor A).

[0196] Figure 33 This diagram schematically illustrates an example of the charging method for the electric shaver A in the embodiment. When the cover body 141 is removed, opening the through hole 1221, as... Figure 33 As shown, the USB terminal 3332 (i.e., an example of the charging unit) is exposed to the outside. With the USB terminal 3332 (i.e., an example of the charging unit) exposed to the outside, the USB cable 8 (i.e., an example of the charging cable) is inserted into the USB terminal 3332 (i.e., an example of the charging unit) to charge the battery 34.

[0197] Thus, in this embodiment, when the blade portion E is located at the top and the base portion D is located at the bottom, the peripheral wall 12 of the base portion D is formed with a USB terminal 3332 (i.e., an example of a charging portion) into which a USB cable 8 (i.e., a charging cable) can be inserted.

[0198] In this way, the battery 34 can be charged while the main body B of the device (i.e., an element of the electric shaver A) is placed on the mounting surface 7a, which further improves the ease of use of the main body B of the device (i.e., an element of the electric shaver A).

[0199] In addition, in this embodiment, an upper seal 41a is installed on the upper part of the peripheral wall of the waterproof unit 2 (more specifically, the upper outer casing 41) (see reference). Figure 16 Furthermore, when the waterproof unit 2 is disposed within the cavity formed inside the lower base housing 10 and fixed to the lower base housing 10, the upper seal 41a abuts against the inner surface of the peripheral wall 12 of the lower base housing 10. In this way, the space formed between the waterproof unit 2 and the lower base housing 10 is sealed on the upper side.

[0200] However, in this embodiment, in order to allow the outer blade assembly B2 to be detachably mounted on the housing B1, a pair of release buttons 44 are mounted on the upper part of the base body 1 in a state that allows them to protrude and be recessed in the Y direction (i.e., the width direction).

[0201] Therefore, a gap is formed at the location where the release button 44 is formed on the base body 1, which communicates with the space formed between the waterproof unit 2 and the lower base shell 10. Therefore, there is a concern that liquids such as water, cut beard hair (i.e., hair as an example), etc., may seep into the space formed between the waterproof unit 2 and the lower base shell 10 through the gap formed at the location where the release button 44 is formed on the base body 1.

[0202] Thus, in this embodiment, a non-waterproof space S4 is formed in the space between the waterproof unit 2 and the lower base housing 10 (see reference). Figure 36 The area is defined as follows: a non-waterproof space S4 is formed outside the waterproof space S3 on the main body side of the base D.

[0203] Therefore, in this embodiment, with the blade portion E located at the top and the base portion D located at the bottom, a discharge port S4a is formed at the lower end of the base portion D, which is capable of discharging liquid present inside the non-waterproof space S4 to the outside (for example, refer to...). Figure 37 ).

[0204] Specifically, a through hole is formed at the center of the lower end of the rear wall 122 in the Y direction (i.e., the width direction), so that the through hole functions as a discharge port S4a. In this embodiment, as described above, the appearance of the peripheral wall D1 of the base D (here, the shape of the outer surface D1a) is generally a smoothly curved shape with a central bulge. Therefore, the lower end of the rear wall 122 also becomes an inclined surface that slopes downward and inward, located behind the rear end of the bottom wall 11. Thus, as Figure 37 As shown, when the main body B of the device (i.e., an element of the electric razor A) is placed on the mounting surface 7a, the outlet S4a is able to face the mounting surface 7a without being blocked by the bottom wall 11.

[0205] In this way, the non-waterproof space S4 functions as a drainage path. Furthermore, it allows liquids such as water that have seeped into the non-waterproof space S4, as well as cut hair (i.e., hair as an example), to be drained out more quickly.

[0206] In particular, in this embodiment, with the blade portion E located at the top and the base portion D located at the bottom, a discharge port S4a is formed at the lower end of the base portion D. Therefore, in this embodiment, when the electric razor A or the device body B is erected on the mounting surface 7a, liquids such as water that have entered the non-waterproof space S4, as well as cut beard hairs (i.e., hair as an example), can be discharged to the outside more quickly.

[0207] Furthermore, at the upper end of the central portion of each pair of sidewalls 123 in the X direction, upward-opening notches 1231 are formed respectively (see reference). Figure 14 and Figure 15 Insert the main body 441 of the release button 44 into the notch 1231 (see reference). Figure 28 The operating part of the machine.

[0208] Next, the specific structure of waterproof unit 2 will be explained.

[0209] In this embodiment, the waterproof unit 2 is assembled by assembling the components in such a way that a waterproof space S3 is formed on the main body side inside. Figure 16 This is a perspective view obtained by observing the waterproof unit 2, which is divided into a lower unit 3 and an upper unit 4, from the top of the front side in the embodiment. Figure 17 This is a perspective view obtained by observing the waterproof unit 2, which is divided into a lower unit 3 and an upper unit 4, from below the rear side in the embodiment. (See diagram below.) Figure 16 and Figure 17 As shown, the waterproof unit 2 includes: a lower unit 3 having a lower housing 31 disposed on the lower side; and an upper unit 4 having an upper housing 41 connected to the upper part of the lower unit 3.

[0210] Furthermore, in this embodiment, a lower seal 41b is installed at the lower end of the upper housing 41, and when the upper unit 4 is connected to the upper part of the lower unit 3, the upper housing 41 and the lower housing 31 are sealed by the lower seal 41b.

[0211] The lower unit 3 has a lower outer shell 31 that opens upwards. The lower outer shell 31 includes a rectangular plate-shaped bottom wall 311 with rounded corners and a peripheral wall 312 that is continuously provided from the outer periphery of the bottom wall 311 upwards. Thus, in this embodiment, the shape of the lower outer shell 31 is also a rectangular bottomed cylinder with rounded corners.

[0212] Figure 18The diagram shows the lower unit 3 partially exploded in the embodiment. It is a perspective view obtained from the top of the front side after the internal components have been removed from the lower outer casing 31. Figure 19 This is a partially exploded view of the lower unit 3 in the embodiment, a perspective view obtained from the lower rear side, showing the state after the internal components have been removed from the lower outer casing 31. (See diagram below.) Figure 18 and Figure 19 As shown, a cavity is formed inside the lower outer casing 31, and internal components such as circuit unit 33 and battery 34 are housed in the cavity formed inside the lower outer casing 31.

[0213] In addition, such as Figure 17 As shown, a through hole 3111 is formed at the center of the Y direction (i.e., the width direction) at the front end of the bottom wall 311 in the X direction (i.e., the front-to-back direction), and this through hole 3111 is sealed by the sealing member 32 (see reference). Figure 19 The through hole 3111 is formed at a position corresponding to the through hole 112 blocked by the switch button 13. When the waterproof unit 2 is placed in the cavity formed inside the lower base housing 10 and fixed to the lower base housing 10, the sealing member 32 blocking the through hole 3111 and the switch button 13 (see reference) Figure 15 )relatively.

[0214] The sealing member 32 includes: a main body 321 that abuts against the through hole 3111; and a flexible portion 322 that is continuously disposed on the inner side of the main body 321 and is capable of flexing in the through direction of the through hole 3111 (i.e., the thickness direction of the bottom wall 311). The flexible portion 322 is formed such that when the waterproof unit 2 is disposed within a cavity formed inside the lower base housing 10 and fixed to the lower base housing 10, it faces the switch button 13. In this embodiment, the flexible portion 322 is formed to elastically flex when the switch button 13 is pressed. Thus, when the hand U2 is removed from the switch button 13 while it is pressed, the flexible portion 322 moves back to its original position, and the switch button 13 also returns to its original position due to the movement of the flexible portion 322.

[0215] Furthermore, the sealing member 32 includes a light guide portion 323 (i.e., an example of a display portion). When the waterproof unit 2 is disposed in the cavity formed inside the lower base housing 10 and fixed to the lower base housing 10, the top end of the light guide portion 323 (i.e., an example of a display portion) is inserted into the through hole 1211 formed in the center of the Y direction (i.e., the width direction) at the lower end of the front wall 121.

[0216] Furthermore, a press-in hole 3112 is formed on one side of the through hole 3111 in the Y direction (i.e., the width direction) at the bottom wall 311. When the waterproof unit 2 is disposed in the cavity of the lower base housing 10, the press-in hole 3112 and the through hole 113 formed in the bottom wall 11 of the lower base housing 10 (i.e., an example of a press-in hole, see reference) Figure 15 Connect.

[0217] Furthermore, in this embodiment, extended mounting walls 3124 are formed on the outer sides of the four corners of the peripheral wall 312, and threaded holes 31241 are formed on each of these extended mounting walls 3124. These threaded holes 31241 are connected to the flange portion 4124 formed on the upper housing 41 (see reference). Figure 28 The lower threaded hole 41243 is connected.

[0218] Furthermore, with the threaded hole 31241 connected to the lower threaded hole 41243, the screw 93 is inserted from below into the threaded hole 31241 and the lower threaded hole 41243, thereby fixing the upper outer shell 41 to the lower outer shell 31.

[0219] Additionally, for example, such as Figure 19 As shown, the peripheral wall 312 includes a front wall 3121, a rear wall 3122, and a pair of side walls 3123 connecting the front wall 3121 and the rear wall 3122.

[0220] Furthermore, a receiving recess 31221 is formed at the center of the lower end of the rear wall 3122 in the Y direction (i.e., the width direction) (see reference). Figure 19 ), an anti-detachment hook 1421 formed at the top of the connecting piece 142 of the cover body 141 of the USB cover 14 (see reference) Figure 14 The hook 1421 is stored in the storage recess 31221. In this embodiment, with the top end of the connecting piece 142 (more specifically, the hook 1421) inserted into the through hole 1221 from the outside (e.g., the rear) and the cover body 141 located outside the lower base housing 10, the hook 1421 is stored in the storage recess 31221.

[0221] And, as Figure 18 and Figure 19 As shown, a circuit unit 33, a battery 34, and a battery holding platform 35, which are internal components, are housed in a cavity formed inside the lower outer casing 31.

[0222] Figure 20 This is an exploded perspective view obtained by observing the internal components of the lower unit 3 from above the front side in the embodiment. Figure 21 This is an exploded perspective view obtained by observing the internal components of the lower unit 3 from below the rear side in this embodiment. In this embodiment, as... Figure 20 and Figure 21As shown, the circuit unit 33 includes a main circuit unit 331 for driving the linear motor 43 (i.e., an example of a motor), a secondary circuit unit 332 for controlling the power supply to be turned on and off, and a USB circuit unit 333 for charging the battery 34. Thus, in this embodiment, the circuit unit 33 for controlling the device body B (i.e., an element of the electric shaver A) is divided into three circuit units. Furthermore, the three circuit units are arranged in a gap formed around the battery holder 35, which is positioned at the center of a cavity formed inside the lower housing 31. This effectively utilizes the cavity formed inside the lower housing 31 to achieve miniaturization of the height dimension of the device body B (i.e., an element of the electric shaver A).

[0223] In this embodiment, the battery holding platform 35 is positioned in the center of a cavity formed inside the lower housing 31 such that its length direction is approximately aligned with the Y direction (i.e., the width direction) and the space for holding the battery 34 is oriented downwards.

[0224] Thus, in this embodiment, the space formed on the battery holding platform 35 for holding the battery 34 becomes the first space S1 (refer to) for arranging the battery 34 capable of supplying power to the linear motor 43 (i.e., an example of a motor). Figures 36-39 The first space S1 becomes an elongated shape in the Y direction (i.e., the width direction and the first direction) extending in the horizontal direction, with the blade portion E and the base portion D arranged in the vertical direction.

[0225] In this way, the first space S1 formed in the base D becomes transversely elongated (i.e., the first space S1 becomes a space that is slender in the width direction), which can suppress the expansion of the base D in the Z direction (i.e., the longitudinal and vertical directions) and further reduce the size of the device body B (i.e., an element of the electric razor A) in the height direction (i.e., the longitudinal and vertical directions).

[0226] At this time, the first space S1 is formed at the center of the base D in the front-back direction (i.e., the second direction).

[0227] In this way, if the first space S1 is formed in the center of the base D in the front-back direction (i.e., the second direction), it is possible to suppress the situation where the center of gravity of the device body B is biased to the front-back direction (i.e., the second direction), and the operability when using the device body B (i.e., an element of the electric razor A) can be further improved.

[0228] Furthermore, in this embodiment, when the device body B is arranged with the blade portion E at the top and the base portion D at the bottom, and the extension direction of the base portion D is approximately aligned with the vertical direction, the driving surface of the inner blade becomes a surface approximately parallel to the horizontal plane. Therefore, the first space S1 also becomes an elongated shape in a direction approximately parallel to the driving surface of the inner blade.

[0229] Furthermore, the battery 34 disposed in the first space S1 may be, for example, a dry cell battery, a rechargeable battery having the same shape as a dry cell battery and being interchangeable with a dry cell battery (e.g., a rechargeable battery in the shape of a dry cell battery). In this embodiment, only one rechargeable battery having the same shape as a dry cell battery and being interchangeable with a dry cell battery (e.g., a rechargeable battery in the shape of a dry cell battery) is used.

[0230] Furthermore, a rechargeable battery (more specifically, a battery 34) in the shape of a dry cell battery is disposed in the first space S1 formed in the battery holding platform 35. In this way, the battery 34 is disposed inside the first space S1 such that its central axis C1 extends parallel to the width direction (i.e., the first direction).

[0231] In addition, in this embodiment, the battery 34 is built into the base D.

[0232] In this way, while ensuring the main body B of the device (i.e., an element of the electric shaver A) is waterproof, it can be configured so that the battery 34 cannot be removed from the waterproof space S3 on the main body side. This allows for more reliable suppression of any reduction in the waterproof performance of the main body B of the device (i.e., an element of the electric shaver A).

[0233] In addition, the base D can also be configured in a way that allows the battery 34 to be removed and placed relative to the first space S1.

[0234] This makes it easier to replace batteries 34 that are no longer usable due to lifespan or other reasons with new batteries 34.

[0235] Such a structure can be obtained, for example, by setting a through hole communicating with the first space S1 in the base D, and using a cover that can seal the waterproof space S3 on the main body side to block the through hole in an openable and closable manner.

[0236] Furthermore, in this embodiment, the main circuit unit 331 for driving the linear motor 43 (i.e., an example of a motor) is disposed near the linear motor 43 (i.e., an example of a motor). Additionally, the secondary circuit unit 332 for controlling the power supply is disposed near the switch button 13. Furthermore, the USB circuit unit 333 for charging the battery 34 is disposed near the through hole 1221 that exposes the USB terminal 3332 (i.e., an example of a charging unit).

[0237] Specifically, by holding the main circuit unit 331 in the main circuit unit holding portion 351 formed on the upper part of the battery holding platform 35, the main circuit unit 331 is positioned near the linear motor 43 (i.e., an example of a motor). Furthermore, by holding the sub-circuit unit 332 in the sub-circuit unit holding portion 352 formed below the front side of the battery holding platform 35, the sub-circuit unit 332 is positioned near the switch button 13. And by holding the USB circuit unit 333 in the USB circuit unit holding portion 353 formed at the rear of the battery holding platform 35, the USB circuit unit 333 is positioned near the through hole 1221. In this way, the circuit board included in each circuit unit becomes a substrate that is as small as possible.

[0238] Figure 22 This is an exploded perspective view of the main circuit unit 331 of the lower unit 3, obtained from the top of the front side in the embodiment. Figure 23 This is an exploded perspective view obtained by observing the main circuit unit 331 of the lower unit 3 from below the rear side in this embodiment. In this embodiment, as... Figure 22 and Figure 23 As shown, the main circuit unit 331 includes: a main circuit board 3311; a pair of busbar terminals 3312 electrically connected to the main circuit board 3311, for supplying power to the coil 43123 (see reference) of the linear motor 43 (i.e., an example of a motor). Figures 30-32 A pair of ends of the battery holder 35 are electrically connected; and a pair of electrode terminals 3313 are electrically connected to the main circuit board 3311 while being held at both ends of the battery holder 35 in the Y direction (i.e., the width direction).

[0239] Furthermore, when a rechargeable battery (more specifically, battery 34) in the shape of a dry cell battery is placed in the first space S1 formed in the battery holding platform 35, one electrode of battery 34 is electrically connected to the main circuit board 3311 via an electrode terminal 3313, and the other electrode of battery 34 is electrically connected to the main circuit board 3311 via another electrode terminal 3313. In this way, the power supplied from battery 34 is used to control the drive of linear motor 43 (i.e., an example of a motor).

[0240] Figure 24 This is an exploded perspective view of the sub-circuit unit 332 of the lower unit 3 as viewed from above on the front side in the embodiment. Figure 25 This is an exploded perspective view obtained by observing the sub-circuit unit 332 of the lower unit 3 from below the rear side in the embodiment. For example... Figure 24 and Figure 25As shown, the sub-circuit unit 332 includes a sub-circuit substrate 3321 and a light-shielding member 3322 held on the sub-circuit substrate 3321 and capable of suppressing the leakage of light emitted from the LED 33212. Furthermore, the sub-circuit substrate 3321 is equipped with: a switching element 33211, which can be operated by a switch button 13 to switch the power supply on and off; and an LED 33212, which can emit light that is irradiated to the outside through the light guide portion 323 (i.e., an example of the display portion).

[0241] Furthermore, in this embodiment, a light-shielding plate 33221 is provided in the light-shielding member 3322, which can suppress the leakage of light emitted from the LED 33212. In this way, if the leakage of light emitted from the LED 33212 can be suppressed, the light emitted from the LED 33212 can be guided into the light-guiding section 323 (i.e., an example of the display section) more efficiently.

[0242] Furthermore, in this embodiment, the main circuit board 3311 and the secondary circuit board 3321 are electrically connected by a flexible flat cable connector 36. This allows the driving of the linear motor 43 (i.e., an example of a motor) to be controlled based on the signal output from the switching element 33211.

[0243] Figure 26 This is an exploded perspective view of the USB circuit unit 333 of the lower unit 3 as viewed from above the front side in embodiment 3. Figure 27 This is an exploded perspective view obtained by observing the USB circuit unit 333 of the lower unit 3 from below the rear side in the embodiment. (See attached image.) Figure 26 and Figure 27 As shown, the USB circuit unit 333 includes a USB circuit board 3331, a USB terminal 3332 (i.e., an example of a charging unit) electrically connected to the USB circuit board 3331, and a holding member 3333 that holds the USB terminal 3332 in the state where the USB terminal 3332 is mounted on the USB circuit board 3331.

[0244] Furthermore, in this embodiment, when the waterproof unit 2 is assembled, the USB terminal 3332 (i.e., an example of the charging unit) can be exposed to the outside of the waterproof unit 2 while the waterproof space S3 on the main body side is sealed.

[0245] Specifically, the USB circuit unit 333 includes: a sealing rubber 3335 that can seal the area around the USB terminal 3332 (i.e., an example of the charging section); and a rubber receiving member 3334 that is mounted on the retaining member 3333 and receives the sealing rubber 3335.

[0246] Furthermore, the top of the USB terminal 3332 (i.e., an example of the charging unit) is inserted into a through hole 4141 formed in an extension wall 414 that is continuously provided from the lower end of the rear wall 4122 of the upper housing 41 (see reference). Figure 17 At this time, the inner surface of the extension wall 414 and the outer surface of the USB terminal 3332 (i.e., an example of the charging part) are sealed by sealing rubber 3335.

[0247] In addition, such as Figure 17 and Figure 27 As shown, threaded holes 33331 are formed on both sides of the USB terminal 3332 (i.e., an example of the charging section) in the Y direction (i.e., the width direction) of the retaining member 3333. When the top end of the USB terminal 3332 (i.e., an example of the charging section) is inserted into the through hole 4141, the pair of threaded holes 33331 communicate with the pair of threaded holes 4142 formed in the extension wall 414. Furthermore, with the threaded holes 33331 communicating with the corresponding threaded holes 4142, a screw 94 is inserted from the rear into the threaded holes 4142 and 33331, thereby fixing the retaining member 3333 that holds the USB circuit board 3331 and the USB terminal 3332 to the extension wall 414. At this time, the screw 94, with the O-ring 81 inserted into the shaft, is inserted into the threaded holes 4142 and 33331. In this way, the threaded hole 4142 is sealed by the O-ring 81.

[0248] On the other hand, such as Figure 28 and Figure 29 As shown, the upper unit 4 has an upper outer shell 41 that opens upwards. The upper outer shell 41 includes a rectangular plate-shaped bottom wall 411 with rounded corners and a peripheral wall 412 that is continuously provided from the outer periphery of the bottom wall 411 upwards. Thus, in this embodiment, the upper outer shell 41 is also a rectangular bottomed cylindrical shape with rounded corners.

[0249] In addition, the upper unit 4 has a top wall 42 of the upper housing 41 that is installed in a state that blocks the upper opening of the upper housing 41.

[0250] Furthermore, a cavity defined by the upper outer shell 41 and the top wall 42 is formed in the upper unit 4, through which the linear motor 43 (i.e., an example of a motor) enables the following... Figures 30-32 The drive components 4324, 4325 and drive pins 4326, 4327 shown are housed in the cavity with their upward-exposed states.

[0251] Thus, in this embodiment, a linear motor is used to drive the inner blade (i.e., an element of the blade section E) by reciprocating motion. This allows the motion of the linear motor 43 (more specifically, reciprocating linear motion) to be directly transmitted to the inner blades 512, 522, and 532. That is, no separate conversion mechanism is required. This helps to prevent the device from becoming too large and also helps to prevent increased manufacturing costs.

[0252] Next, the specific structure of the linear motor 43 will be described.

[0253] Figure 30 This is an exploded perspective view of the linear motor 43 of the upper unit 4 as seen from above on the front side in the embodiment. Figure 31 This is an exploded perspective view of the linear motor 43 of the upper unit 4 as observed from below the rear side in the embodiment. Figure 32 This is a side view showing the linear motor 43 of the upper unit 4 in the embodiment. (See attached image.) Figures 30-32 As shown, the linear motor 43 includes: an electromagnetic core assembly 431 having an electromagnet 4312; two magnetic assemblies 432 (i.e., an example of a plurality of magnetic assemblies) having permanent magnets 4322 disposed opposite to the electromagnets 4312; a connecting plate 433 connecting the two magnetic assemblies 432 to the electromagnetic core assembly 431 respectively; and a pair of connecting spring portions 434 connecting the two magnetic assemblies 432.

[0254] The electromagnetic core assembly 431 has a base 4311 made of synthetic resin, on which an electromagnet 4312 is fixed.

[0255] Furthermore, the electromagnet 4312 includes a core 43121 as a magnetic body and a coil 43123 wound around the core 43121 via an insulating winding frame 43122. An alternating current (i.e., alternating current) is supplied to the coil 43123 in alternating directions. Additionally, the electromagnet 4312 is disposed on the base 4311 with its magnetic pole faces respectively facing the permanent magnets 4322 of the two magnetic components 432.

[0256] A pair of magnetic components 432 are arranged in a front-rear direction X with a gap between them. Each magnetic component 432 includes a retaining part 4321 made of synthetic resin, a permanent magnet 4322, and a back yoke 4323 of the magnetic body. Furthermore, a driving member 4324 is fixed to the upper surface of each retaining part 4321 using screws 97. Additionally, neodymium magnets can be used, for example, as the permanent magnet 4322.

[0257] Here, each magnetic component 432 is configured to reciprocate independently in the reciprocating motion direction (i.e., the Y direction and the left-right direction) by the deformation of a pair of connecting plates 433. Specifically, the permanent magnet 4322 of each magnetic component 432 is arranged opposite to the magnetic pole face of the electromagnet 4312 of the electromagnetic core component 431 by the connecting plates 433 with a predetermined gap. Moreover, the permanent magnets 4322 of the pair of magnetic components 432 are arranged with opposite polarities relative to the magnetic pole face of the electromagnet 4312 and are subjected to opposite electromagnetic forces (e.g., attractive or repulsive forces). In this way, when the electromagnet 4312 is energized, the moving forces that are opposite to each other in the reciprocating motion direction (i.e., the Y direction and the left-right direction) act on the pair of magnetic components 432. In addition, a back yoke 4323 is arranged on the upper surface of the permanent magnet 4322 (more specifically, the surface of the permanent magnet 4322 opposite to the side of the electromagnet 4312).

[0258] In this embodiment, a pair of connecting plates 433 are integrally formed on the retaining portion 4321. Each connecting plate 433 includes an upper extending portion 4331, a lower extending portion 4332, and an elastic plate portion 4333 disposed therebetween. The pair of upper extending portions 4331 are respectively fixed to both ends of the retaining portion 4321. Furthermore, each lower extending portion 4332 is provided with a mounting protrusion 43321, and each mounting protrusion 43321 is fixed to the base 4311 of the electromagnetic core assembly 431 using screws 98. In this way, each magnetic assembly 432 is supported in a suspended state by the connecting plates 433.

[0259] Furthermore, in this embodiment, a pair of connecting spring portions 434 are integrally formed on the connecting plate 433, which is integrally formed on the retaining portion 4321. That is, in this embodiment, the left and right pair of connecting spring portions 434 are connected to each magnetic component 432 via connecting plates 433 (i.e., an example of elastic support portions) formed on the left and right sides of the magnetic component 432 in the reciprocating motion direction (i.e., the Y direction, the left and right direction).

[0260] Each connecting spring portion 434 includes two connecting base portions 4341 (i.e., an example of the root portion) and a spring sheet portion 4342 disposed between the connecting base portions 4341. Furthermore, the two connecting base portions 4341 of each connecting spring portion 434 are respectively fixed to the upper extension portion 4331 of the connecting plate 433 of the front magnetic assembly 432 and the upper extension portion 4331 of the connecting plate 433 of the rear magnetic assembly 432.

[0261] In this embodiment, the two connecting bases 4341 of each connecting spring portion 434 are respectively provided in such a way that the outer portion of the upper extending portion 4331 in the reciprocating motion direction (i.e., the Y direction and the left and right direction) protrudes outward in the reciprocating motion direction (i.e., the Y direction and the left and right direction).

[0262] Furthermore, the spring sheet portion 4342 is shaped to bend the strip-shaped member into a generally C-shape, and both ends of the strip-shaped spring sheet portion 4342 are respectively connected to two connecting base portions 4341. In this embodiment, the spring sheet portion 4342 is shaped to bend into a generally C-shape that opens upwards in the Z direction (i.e., the up-down direction).

[0263] Furthermore, in this embodiment, the spring sheet portion 4342 includes: a generally plate-shaped torsion portion 43421 located at the lower part and extending generally parallel to the X direction (i.e., the front-to-back direction); and a flexure portion 43422 extending in a generally semi-circular arc shape from the front and rear ends of the torsion portion 43421 toward the upper part.

[0264] Furthermore, if a linear motor 43 is used to supply current alternately in different directions to the electromagnet 4312, then the electromagnetic force based on the electromagnet 4312 and the permanent magnet 4322 alternately applies a moving force to one side of the reciprocating motion direction (i.e., the Y direction and the left-right direction) and a moving force to the other side of the reciprocating motion direction (i.e., the Y direction and the left-right direction) to the pair of magnetic components 432. Thus, when the moving force in the reciprocating motion direction (i.e., the Y direction and the left-right direction) acts on each magnetic component 432, the connecting plate 433 deforms, and through the deformation of the connecting plate 433, the pair of magnetic components 432 reciprocate in the reciprocating motion direction (i.e., the Y direction and the left-right direction), respectively.

[0265] Furthermore, in this embodiment, the moving force acting on one magnetic component 432 in the reciprocating motion direction (i.e., the Y direction and the left-right direction) and the moving force acting on the other magnetic component 432 in the reciprocating motion direction (i.e., the Y direction and the left-right direction) are opposite to each other. That is, when a moving force is applied to one magnetic component 432 in the reciprocating motion direction (i.e., the Y direction and the left-right direction), a moving force is applied to the other magnetic component 432 in the opposite direction of the reciprocating motion direction (i.e., the Y direction and the left-right direction). Therefore, in this embodiment, the pair of magnetic components 432 reciprocate in the reciprocating motion direction (i.e., the Y direction and the left-right direction) with a phase difference of 180 degrees.

[0266] Furthermore, when the pair of magnetic components 432 reciprocate in the reciprocating motion direction (i.e., the Y direction and the left-right direction), the spring plate portion 4342 connecting the spring portion 434 elastically deforms. Specifically, the front and rear pairs of flexural portions 43422 of the spring plate portion 4342 flex and deform in opposite phases in the reciprocating motion direction (i.e., the Y direction and the left-right direction). As the flexural portion 43422 flexes and deforms, the torsion portion 43421 twists and deforms in opposite directions on the front and rear sides with the central axis extending in the X direction (i.e., the front-rear direction) as the center.

[0267] Thus, when the pair of magnetic components 432 reciprocate in the reciprocating motion direction (i.e., the Y direction and the left-right direction), the connecting spring portion 434 elastically deforms in opposite directions about the center line between the pair of magnetic components 432. Furthermore, the spring force generated by the elastic deformation of the front side acts on the front magnetic component 432, and the spring force generated by the elastic deformation of the rear side acts on the rear magnetic component 432. At this time, the spring force generated by the elastic deformation (more specifically, flexural deformation and torsional deformation) of the spring plate portion 4342 acts in directions that respectively limit the amplitude of the pair of magnetic components 432. Moreover, by setting the spring constant of the connecting spring portion 434 to a predetermined value, the amplitude (more specifically, the resonant frequency) of the pair of magnetic components 432 can be set to a desired value.

[0268] And, as Figure 29 As shown, a pair of threaded holes 4111 are formed in the center of the middle part of the bottom wall 411 in the X direction (i.e., the front-to-back direction) and the center part in the Y direction (i.e., the width direction). The linear motor 43 is fixed to the upper housing 41 by inserting the screw 95 into the threaded hole 4111 from below.

[0269] In addition, such as Figure 29 As shown, a pair of through holes 4113 are formed at the center of the front end of the bottom wall 411 in the X direction (i.e., the front-to-back direction) in the Y direction (i.e., the width direction). The ends of the coils 43123 of the linear motor 43 are inserted into the through holes 4113 from above. Furthermore, the ends of the coils 43123 inserted into the through holes 4113 are connected to the busbar terminals 3312 (for example, see reference 3312). Figure 23 Electrical connection. This connects the linear motor 43 to the main circuit board 3311.

[0270] In this embodiment, as Figure 36 and Figure 38As shown, the linear motor 43 (i.e., an example of a motor) is built into the base D (i.e., an example of a main body) in a slender state extending in the horizontal direction. That is, the linear motor 43 (i.e., an example of a motor) is built into the base D (i.e., an example of a main body) in a transversely elongated state (i.e., a slender state in the width direction). In this way, the longitudinal (i.e., vertical direction) expansion of the base D (i.e., an example of a main body) can be suppressed, and the height direction (i.e., vertical and vertical direction) dimension of the electric shaver A (i.e., an example of a hair removal device) can be further reduced.

[0271] Furthermore, in this embodiment, the linear motor 43 (i.e., an example of a motor) is also, like the first space S1, elongated in the Y direction (i.e., the width direction and the first direction) extending in the horizontal direction, with the blade portion E and the base portion D arranged in the vertical direction. That is, the linear motor 43 (i.e., an example of a motor) is built into the base portion D (i.e., an example of the main body portion) in an elongated state in the width direction (i.e., the first direction).

[0272] In this way, the electric shaver A (i.e., an example of a hair removal device) can be miniaturized in the height direction (i.e., in the vertical and up-down directions) and the thickness of the electric shaver A (i.e., an example of a hair removal device) can be reduced (i.e., the length in the front-to-back direction is shortened).

[0273] Furthermore, it is preferable that when the linear motor 43 (i.e., an example of a motor) is built into the base D (i.e., an example of the main body), at least the motor main body (more specifically, the part other than the drive member, drive pin, and coil extension part) is in a transversely elongated state (i.e., in a slender state in the width direction).

[0274] In this embodiment, the portion of the linear motor 43 (i.e., an example of a motor) that includes a drive member and a drive pin, except for the coil stretched from the coil frame, becomes elongated (slender in the width direction) when it is built into the base D (i.e., an example of the main body).

[0275] Thus, in this embodiment, the linear motor 43 (i.e., an example of a motor) is elongated (i.e., slender in the width direction) in the state including the drive member and drive pin. This allows for more reliable miniaturization of the electric shaver A (i.e., an example of a hair removal device) in the height direction (vertical and vertical directions). Therefore, it is more preferable that the linear motor 43 (i.e., an example of a motor) is built into the base D (i.e., the main body) in an elongated state (slender in the width direction), and the linear motor 43 (i.e., an example of a motor) including the drive member and drive pin is elongated (i.e., slender in the width direction).

[0276] Moreover, in this embodiment, such as Figure 32 As shown, the linear motor 43 (i.e., an example of a motor), which also includes a drive member, a drive pin, and a coil extension portion, is integrally built into the base D (i.e., an example of a main body) in a horizontally elongated state (i.e., a slender state in the width direction). In this way, further miniaturization of the electric shaver A (i.e., an example of a hair removal device) in the height direction (i.e., the vertical and up-down directions) can be achieved. Thus, it is also possible to set up a structure in which the linear motor 43 (i.e., an example of a motor) is horizontally elongated (i.e., a slender shape in the width direction), and the entire linear motor 43 (i.e., an example of a motor), which also includes a drive member, a drive pin, and a coil extension portion, becomes horizontally elongated (i.e., a slender shape in the width direction).

[0277] Additionally, the peripheral wall 412 includes a front wall 4121, a rear wall 4122, and a pair of side walls 4123 connecting the front wall 4121 and the rear wall 4122.

[0278] And, as Figure 17 As shown, an extension wall 414 is continuously provided at the lower end of the rear wall 4122 in a downward direction, and the top end of the USB terminal 3332 (i.e., an example of the charging part) is inserted into the through hole 4141 formed in the extension wall 414.

[0279] In addition, such as Figure 28 and Figure 29 As shown, a spring receiving portion 41232 is formed at the upper part of the central portion in the Z direction of the X direction (i.e., the front-to-back direction) of a pair of sidewalls 4123, which allows the top end of the coil spring 443 to abut against it, and a loading / unloading button holding portion 41231 is formed at the upper part of the central portion in the Z direction of the pair of sidewalls 4123, which allows the main body portion 441 to be held in a protruding and recessed state when force is applied in the Y direction (i.e., the width direction).

[0280] In this embodiment, a flange 4124 extending outward is formed on the peripheral wall 412, and threaded holes 41241 are formed at the four corners of the flange 4124. Furthermore, when the waterproof unit 2 is disposed in the cavity of the lower base housing 10, the threaded holes 41241 communicate with the threaded holes 120a formed at the four corners of the interior of the peripheral wall 12 and the threaded holes 4211 formed in the top wall body 421 of the top wall 42.

[0281] Furthermore, upper threaded holes 41242 opening upward are formed at the four corners of the flange portion 4124, and these upper threaded holes 41242 communicate with the threaded holes 4212 formed in the top wall body 421 of the top wall 42 and the threaded holes 4221 formed in the pressing plate 422.

[0282] Furthermore, with the upper threaded hole 41242 connected to the threaded holes 4212 and 4221, the screw 96 is inserted from above into the threaded holes 4221, 4212 and the upper threaded hole 41242, thereby fixing the top wall body 421 and the pressing plate 422 to the upper outer shell 41.

[0283] In addition, a lower threaded hole 41243 with a downward opening is formed at each of the four corners of the flange portion 4124, and the lower threaded hole 41243 communicates with the threaded hole 31241 formed in the extended mounting wall 3124.

[0284] In addition, in this embodiment, such as Figure 28 and Figure 29 As shown, the top wall 42 includes: a top wall body 421, which is installed on the upper housing 41 in a state of blocking the upper opening of the upper housing 41; a waterproof rubber 423, which seals the cavity of the upper unit 4; and a pressing plate 422, which presses the waterproof rubber 423.

[0285] In this embodiment, the waterproof rubber 423 is held between the top wall body 421 and the pressing plate 422, thereby pressing the waterproof rubber 423 by the pressing plate 422.

[0286] Furthermore, a threaded hole 4211 is formed in the top wall body 421 for fixing the lower base housing 10 and the top wall body 421 in such a way that the upper housing 41 is sandwiched in the middle. Also, a threaded hole 4212 is formed in the top wall body 421 for fixing the top wall body 421 and the pressing plate 422 to the upper housing 41. Moreover, a pair of through holes 4213 are formed in the top wall body 421, through which a pair of driving members 4324 pass from below, thereby exposing the pair of driving members 4324 upwards.

[0287] Additionally, the pressing plate 422 has threaded holes 4221 for fixing the top wall body 421 and the pressing plate 422 to the upper housing 41. Moreover, the pressing plate 422 has a pair of through holes 4222, through which a pair of driving members 4324 pass from below, thereby exposing the pair of driving members 4324 upwards.

[0288] In addition, a pair of through holes 4231 are formed in the waterproof rubber 423, through which a pair of driving members 4324 pass from below, so that the waterproof rubber 423 and the side of the driving member 4324 are tightly fitted, thereby sealing the hole defined by the upper outer shell 41 and the top wall 42.

[0289] Thus, in this embodiment, the cavity formed inside the lower base shell 10 and the cavity defined by the upper shell 41 and the top wall 42 become the main body side waterproof space S3 formed inside the waterproof unit 2.

[0290] Next, the specific structure of the blade guard C will be explained.

[0291] The blade guard C is a component used to protect the skin contact surface 5a of the blade part E exposed to the outside of the device body B when the device is not in use, and can be detachably installed on the device body B.

[0292] In this embodiment, the blade guard C is detachably mounted to the device body B using magnetic force, without forming any protrusions or recesses at the base D that can engage with the blade guard C (i.e., an example of a mechanically fixed shape).

[0293] In this way, if the base D is not provided with a protrusion or recess (i.e., an example of a mechanically fixed shape), the following situation can be suppressed: when using the device body B (i.e., an element of the electric razor A), the finger U22 gets stuck on the protrusion or recess, as is the case when the base D is provided with a protrusion or recess (i.e., an example of a mechanically fixed shape), thus further improving the operability when using the device body B (i.e., an element of the electric razor A).

[0294] Specifically, a neodymium magnet or other magnet 63 (see below) is installed in the blade guard C. Figure 34 Furthermore, five outer blades (i.e., two mesh blades 511, two fine shaving mesh blades 521, and one slit outer blade 531) are formed from strongly magnetic stainless steel (hereinafter referred to as "SUS"). In this way, the blade protector C can be detachably mounted to the device body B using the magnetic attraction generated between the magnet 63 and the outer blade of the blade section E. Thus, in this embodiment, a magnet 63 is provided in the blade protector C, and the outer blade of the blade section E is formed from a strongly magnetic material such as metal, thereby utilizing the attraction of the magnet 63 (more specifically, the magnetic attraction generated between the magnet 63 and the outer blade of the blade section E) to detachably mount the blade protector C to the device body B.

[0295] Furthermore, in this embodiment, the blade guard C is detachably mounted to the device body B using the magnetic attraction generated between the slit outer blade 531, which has relatively high stiffness (i.e., strong resistance to deformation). This allows for more reliable suppression of deformation of the outer blade of the blade section E.

[0296] Figure 34 This is an exploded perspective view of the blade guard C taken from the top of the front side. Figure 35 This is an exploded perspective view of the blade guard C obtained from the lower rear side. In this embodiment, as... Figure 34 and Figure 35 As shown, the blade protector C includes a blade protector body 6 that is curved in an upwardly projecting manner, and a magnet 63 is mounted on the inner side of the blade protector body 6.

[0297] Moreover, in this embodiment, such as Figures 36-39 As shown, a waterproof space S5 is formed on the blade guard C, and a magnet 63 is disposed inside the waterproof space S5. This prevents liquids such as water from coming into contact with the magnet 63.

[0298] Specifically, such as Figure 35 As shown, a waterproof cover receiving recess 61 is formed on the inner side of the blade protector body 6 to accommodate the waterproof cover 651. Furthermore, an elongated annular protrusion 611 in the width direction and a protrusion 612 for preventing the waterproof cover 651 from falling off are formed in the waterproof cover receiving recess 61.

[0299] Furthermore, a buffer 64 and two magnets 63 are sequentially inserted into the inner side of the annular protrusion 611. With the O-ring 652 positioned between the annular protrusion 611 and the waterproof cover 651, the waterproof cover 651 is housed in the waterproof cover housing recess 61, thereby forming a waterproof space S5 on the blade protective cover side in the blade protective cover C.

[0300] In this embodiment, the covering portion 6511 of the waterproof cover 651 covers the annular protrusion 611 into which the buffer member 64 and the two magnets 63 are inserted, thereby forming a waterproof space S5 on the blade protector side. Furthermore, by pressing the flange portion 6512 formed around the covering portion 6511 with the protrusion 612, the waterproof cover 651 is prevented from falling off the blade protector body 6.

[0301] In this way, the blade protector C can be installed on the device body B simply by covering the device body B with the blade protector C.

[0302] At this time, by making the distance L5 between the magnet 63 installed on the blade guard C and the outer blade (more specifically the slit outer blade 531) a desired distance, the loading and unloading force of the blade guard C relative to the device body B can be made into a desired loading and unloading force.

[0303] Furthermore, preferably, when the blade guard C is installed on the main body B of the device, the distance L5 between the magnet 63 and the outer blade (more specifically, the slit outer blade 531) is greater than zero (more specifically, the magnet 63 and the slit outer blade 531 are separated).

[0304] For example, there is a concern that if the structure is such that the magnet 63 contacts (or is attracted to) the outer blade (more specifically, the slit outer blade 531) when the blade protector C is installed on the device body B, the outer blade (i.e., the slit outer blade 531) may be damaged when the blade protector C is removed from the device body B or when the electric razor A is dropped. However, if, as in this embodiment, the magnet 63 and the outer blade (more specifically, the slit outer blade 531) are separated when the blade protector C is installed on the device body B, damage to the outer blade (more specifically, the slit outer blade 531) can be avoided when the blade protector C is removed from the device body B or when the electric razor A is dropped.

[0305] Furthermore, in this embodiment, the lower end face 621 of the blade protector body 6 is an inclined surface that slopes inward and upward, and the upper end face 151b of the peripheral wall 151 of the upper base housing 15 is an inclined surface that slopes inward and upward at an angle corresponding to the lower end face 621 of the blade protector body 6. In this way, when the blade protector body 6 is gripped from the front and rear and an inward force is applied, the blade protector body 6 is guided by the upper end face 151b and moves in the direction of disengagement from the device body B. Therefore, when the blade protector C is attached to or detached from the device body B, damage to the blade portion E can be more reliably suppressed.

[0306] Furthermore, in this embodiment, an operating protrusion 62 is provided at the lower rear end of the blade guard body 6. By operating the operating protrusion 62, the blade guard C can be mounted or dismounted relative to the device body B.

[0307] In addition, in this embodiment, only one rechargeable battery with the same shape as a dry cell battery and interchangeable with a dry cell battery (i.e., a rechargeable battery in the shape of a dry cell battery) is used, but it is also possible to arrange multiple batteries 34 inside the first space S1.

[0308] In this embodiment, a non-waterproof space S6 is formed above the top wall 42 on the upper side of the waterproof space S3 (i.e., an example of a waterproof space) on the main body side where the linear motor 43 (i.e., an example of a motor) is housed. This non-waterproof space S6 allows the blade portion E to be partially exposed, permitting the immersion of liquids such as water (see reference). Figures 36-38 In this way, the blade section E can be cleaned with a liquid such as water after using the electric razor A (i.e., an element of the main body B of the device).

[0309] In this embodiment, such as Figures 36-39As shown, the non-waterproof space S6 is defined by the top wall body 421 of the top wall 42, the peripheral wall 151 of the upper base shell 15, and outer blades (i.e., mesh blade 511, fine shaving mesh blade 521, and slit outer blade 531) arranged to cover the upper opening 15a of the upper base shell 15. Furthermore, liquids such as water can seep into the non-waterproof space S6 through the openings of the outer blades (i.e., mesh blade 511, fine shaving mesh blade 521, and slit outer blade 531).

[0310] There is a concern that if such a non-waterproof space S6 is formed, after cleaning the blade section E, liquids such as water will adhere to the inner surface of the non-waterproof space S6 and the blade section E (especially the mesh inner blade 512 disposed in the non-waterproof space S6 as an inner blade), and liquids such as water will remain in the non-waterproof space S6, producing a foul odor.

[0311] Therefore, it is preferable to prevent liquids such as water from remaining in the non-waterproof space S6 where the blade supply section E is partially exposed.

[0312] Therefore, in this embodiment, it is possible to more reliably suppress the presence of liquids such as water in the non-waterproof space S6.

[0313] Specifically, such as Figure 28 and Figures 36-39 As shown, the base D (i.e., an example of the main body) includes a drying mechanism 100 for drying the non-waterproof space S6. The drying mechanism 100 includes a film heater 101 (i.e., an example of a heating element) that generates heat. In this way, after cleaning the blade section E with a liquid such as water, the drying mechanism 100 can evaporate any liquid remaining in the non-waterproof space S6, thus drying the non-waterproof space S6. This more reliably suppresses the presence of liquid residue in the non-waterproof space S6 and prevents the generation of foul odors caused by liquid residue in the non-waterproof space S6. As a result, the electric razor A (i.e., an example of the device body B) can be used more hygienically.

[0314] Furthermore, in this embodiment, the drying mechanism 100 includes a heat dissipation member 102, to which heat generated by the membrane heater 101 (i.e., an example of a heating element) is transferred, and the heat dissipation member 102 dissipates heat to the non-waterproof space S6. In this way, regardless of the arrangement of the membrane heater 101 (i.e., an example of a heating element), heat generated by the membrane heater 101 (i.e., an example of a heating element) can be dissipated from the heat dissipation member 102 to the non-waterproof space S6.

[0315] Alternatively, the drying mechanism 100 can be configured such that it includes only the membrane heater 101 (i.e., an example of a heating element) and the membrane heater 101 (i.e., an example of a heating element) in the heat dissipation member 102. In this case, it is preferable to expose the surface of the membrane heater 101 (i.e., an example of a heating element) to the non-waterproof space S6, so that the heat generated by the membrane heater 101 (i.e., an example of a heating element) is directly dissipated to the non-waterproof space S6.

[0316] In addition, the heating element is not limited to a film heater. For example, various elements such as Peltier elements, heating wires, and light-emitting elements that emit sufficient heat to dry the light when they emit light can be used as heating elements.

[0317] At this time, the structure can be configured such that the base D (i.e., an example of the main body) includes a partition wall 200 that defines a non-waterproof space S6, and a membrane heater 101 (i.e., an example of a heating element) is provided in the partition wall 200. Alternatively, a heat dissipation element 102 can also be provided in the partition wall 200.

[0318] In this embodiment, such as Figure 28 , Figure 29 as well as Figures 36-39 As shown, the structure is as follows: the top wall 42 includes a resin top wall body 421 and a metal pressing plate 422 disposed on the upper part of the top wall body 421. A membrane heater 101 (i.e., an example of a heating element) is sandwiched between the top wall body 421 and the pressing plate 422. In this way, the resin top wall body 421 is used to suppress the movement of heat generated by the membrane heater 101 (i.e., an example of a heating element) downwards towards the waterproof space S3 formed on the body side (i.e., an example of a waterproof space), and the heat generated by the membrane heater 101 (i.e., an example of a heating element) is transferred to the metal pressing plate 422 more efficiently.

[0319] Furthermore, the metal pressing plate 422 is positioned on the upper part of the top wall body 421 so that its upper surface is exposed to the non-waterproof space S6, thus the heat transferred to the pressing plate 422 is dissipated from the upper surface of the pressing plate 422 to the non-waterproof space S6.

[0320] Thus, in this embodiment, a structure is shown in which the pressing plate 422 functions as a heat dissipation member 102. This eliminates the need for a separate heat dissipation member 102, simplifying the structure and reducing costs.

[0321] Furthermore, in this embodiment, the peripheral wall 151 of the upper base shell 15 also serves as the partition wall 200 defining the non-waterproof space S6. That is, the top wall body 421 becomes the bottom wall constituting part of the partition wall 200 defining the non-waterproof space S6, and the peripheral wall 151 becomes the side wall constituting part of the partition wall 200 defining the non-waterproof space S6. Therefore, it is also possible to provide a membrane heater 101 (i.e., an example of a heating element) and a heat dissipation element 102 on the peripheral wall 151. Alternatively, it is also possible to provide only the membrane heater 101 (i.e., an example of a heating element) on the peripheral wall 151, and thermally connect the membrane heater 101 (i.e., an example of a heating element) and the pressing plate 422 via a heat transfer element, thereby using the pressing plate 422 as the heat dissipation element 102. In this embodiment, the peripheral wall 151 is also formed using a resin material. Therefore, even when a film heater 101 (i.e., an example of a heating element) is provided on the peripheral wall 151, the heat diffusion generated by the film heater 101 (i.e., an example of a heating element) can be suppressed using the peripheral wall 151. Thus, the heat generated by the film heater 101 (i.e., an example of a heating element) can be transferred to the heat dissipation member 102 more efficiently and dissipated to the non-waterproof space S6.

[0322] Thus, it is also possible to configure the structure as follows: a drying mechanism 100 is provided in the partition wall 200 that defines the non-waterproof space S6. Furthermore, it is also possible to configure the structure as follows: a heat dissipation member 102 is provided in the partition wall 200 to expose at least partially to the non-waterproof space S6.

[0323] In this way, the heat generated by the membrane heater 101 (i.e., an example of the heating element) can be dissipated more efficiently from the heat dissipation element 102 to the non-waterproof space S6, thus more reliably suppressing the situation where liquid remains in the non-waterproof space S6.

[0324] Furthermore, as shown in this embodiment, if the pressing plate 422 is used as the heat dissipation member 102, a mesh inner blade 512 is disposed below the outer blade (i.e., the mesh blade 511, the fine shaving mesh blade 521, and the slit outer blade 531), and the heat dissipation member 102 is disposed below the mesh inner blade 512.

[0325] Thus, in this embodiment, the blade section E includes an outer blade (i.e., the mesh blade 511, the fine shaving mesh blade 521, and the slit outer blade 531) configured in a state partially exposed to the non-waterproof space S6, and an inner blade (including the mesh inner blade 512) configured within the non-waterproof space S6 and slidingly contacting the outer blade (mesh blade 511, fine shaving mesh blade 521, and slit outer blade 531). Furthermore, it is also possible to configure the blade with the following structure: when the mesh inner blade 512 is located below the outer blade (i.e., the mesh blade 511, fine shaving mesh blade 521, and slit outer blade 531), the heat dissipation member 102 is positioned below the mesh inner blade 512.

[0326] In this way, the heat rising in the non-waterproof space S6 due to heat dissipation from the heat dissipation member 102 to the non-waterproof space S6 comes into contact with the mesh inner blade 512, thus enabling the liquid adhering to the mesh inner blade 512 to evaporate more efficiently. As a result, the situation where liquid remains in the non-waterproof space S6 can be more reliably suppressed.

[0327] At this point, it is preferable that the mesh inner blade 512 and the heat dissipation member 102 overlap when the electric razor A (i.e., an element of the device body B) is viewed along the Z direction (i.e., the up-down direction). This allows the heat rising in the non-waterproof space S6 due to heat dissipation from the heat dissipation member 102 to the mesh inner blade 512 to reliably contact the mesh inner blade 512, thus enabling more efficient evaporation of the liquid adhering to the mesh inner blade 512. Furthermore, if moisture in the non-waterproof space S6 evaporates, the evaporated moisture rises, but since there is an opening in the upper part of the non-waterproof space S6 (i.e., the part where the outer blade is disposed), the evaporated and rising moisture can diffuse more efficiently from the opening in the non-waterproof space S6 to the outside of the electric razor A (i.e., an element of the device body B).

[0328] Alternatively, the structure can be configured such that a membrane heater 101 (i.e., an example of a heating element) is disposed between the heat dissipation member 102 and the partition wall 200. Furthermore, the structure can also be configured such that the membrane heater 101 (i.e., an example of a heating element) is sandwiched between the heat dissipation member 102 and the partition wall 200. In this way, the heat generated by the membrane heater 101 (i.e., an example of a heating element) can be directly transferred to the heat dissipation member 102, thus enabling more efficient heat dissipation from the heat dissipation member 102 to the non-waterproof space S6. As a result, the possibility of liquid residue remaining in the non-waterproof space S6 can be more reliably suppressed.

[0329] At this time, the structure can also be configured such that the entire membrane heater 101 (i.e., an example of a heating element) is covered by the heat dissipation element 102. In this way, it is possible to prevent the user's hand U2 from touching the membrane heater 101 (i.e., an example of a heating element), so even if the blade part E is detachably mounted on the base D (i.e., an example of the main body) and the non-waterproof space S6 is exposed, the electric razor A (i.e., an element of the device main body B) can be used more safely. In addition, it is also possible to prevent the membrane heater 101 (i.e., an example of a heating element) from being peeled off due to the user's hand U2 touching the membrane heater 101 (i.e., an example of a heating element).

[0330] Furthermore, it can also be configured such that the electric shaver A (i.e., an element of the device body B) is configured such that the drying mechanism 100 operates when the linear motor 43 (i.e., an example of the motor) is not driven, so that the non-waterproof space S6 can be dried when the electric shaver A (i.e., an element of the device body B) is not shaved after cleaning.

[0331] Furthermore, it is preferable that, when the electric razor A (i.e., an element of the device body B) is configured such that the blade part E is detachably mounted to the base D (i.e., an example of the main body) exposing the non-waterproof space S6, and the drying mechanism 100 operates when the linear motor 43 (i.e., an example of the motor) is not driven, the switching on and off of the film heater 101 (i.e., an example of the heating element) is linked to the mounting and dismounting of the blade part E relative to the base D (i.e., an example of the main body). Moreover, it is preferable that the film heater 101 (i.e., an example of the heating element) is in the off state after the blade part E has been removed from the base D (i.e., an example of the main body). This allows for safer use of the electric razor A (i.e., an element of the device body B).

[0332] Alternatively, the structure can be configured such that, when the membrane heater 101 (i.e., an example of the heating element) is operating, the temperature of the membrane heater 101 (i.e., an example of the heating element) is controlled between 40°C and 80°C. This allows for a more suitable temperature within the non-waterproof space S6, suppresses any decrease in the drying performance of the non-waterproof space S6, and enables safer use of the electric razor A (i.e., an element of the device body B).

[0333] Such a structure can be obtained, for example, in the following ways: Figure 28 , Figure 29 as well as Figures 36-39 As shown, a thermistor 103 is provided to control the temperature of the film heater 101 (i.e., an example of a heating element) to be above 40°C and below 80°C.

[0334] In addition, the power supply system for supplying power to the membrane heater 101 (i.e., an example of a heating element) can be the same as the power supply system for supplying power to the linear motor 43 (i.e., an example of a motor), or it can be a different system.

[0335] Furthermore, the electric shaver A (i.e., an example of a hair removal device) is not limited to the structure shown in the above embodiments. Figure 42 This is a perspective view of an electric shaver A, which is a first modified example of a hair removal device. Figure 43 This is an exploded view showing an electric shaver A as a first modification of a hair removal device. The electric shaver A (i.e., an example of a hair removal device) can also be configured as follows: Figure 42 and Figure 43 The electric shaver A shown is an example of a hair removal device.

[0336] Figure 42 and Figure 43 The electric shaver A shown (i.e., an example of a hair removal device) is also a reciprocating electric shaver A (i.e., an example of a hair removal device). It is a small shaver housed in the palm U21 of the user U, that is, an electric shaver that can be used with the palm U21 covering the main body.

[0337] Here, the electric shaver A of the above-described embodiment (i.e., an example of a hair removal device) is a five-blade electric shaver consisting of two mesh blade assemblies 51, two fine shaving mesh blade assemblies 52, and one slit blade assembly 53. In contrast, Figure 42 and Figure 43 The electric razor A shown (i.e., an example of a hair removal device) is a three-blade electric razor consisting of two mesh blade assemblies 51 and a slit blade assembly 53.

[0338] Furthermore, in Figure 42 and Figure 43 In the electric shaver A shown (i.e., an example of a hair removal device), the base D (i.e., an example of a main body) also includes a drying mechanism 100 for drying the non-waterproof space S6. The drying mechanism 100 includes a film heater 101 (i.e., an example of a heating element) that generates heat. Specifically, the base D (i.e., an example of a main body) includes a partition wall 200 that defines the non-waterproof space S6, on which the film heater 101 (i.e., an example of a heating element) is disposed, and on the partition wall 200 a heat dissipation member 102 is disposed.

[0339] In addition, Figure 42 and Figure 43The electric shaver A shown (i.e., an example of a hair removal device) also exhibits the following structure: the top wall 42 includes a resin-made top wall body 421 and a metal pressing plate 422 disposed on the upper part of the top wall body 421. A membrane heater 101 (i.e., an example of a heating element) is sandwiched between the top wall body 421 and the pressing plate 422. In this way, the resin-made top wall body 421 prevents the heat generated by the membrane heater 101 (i.e., an example of a heating element) from moving downwards towards the waterproof space S3 (i.e., an example of a waterproof space) formed on the body side, and the heat generated by the membrane heater 101 (i.e., an example of a heating element) is transferred to the metal pressing plate 422 more efficiently.

[0340] Furthermore, the metal pressing plate 422 is positioned on the upper part of the top wall body 421 so that its upper surface is exposed to the non-waterproof space S6, thus the heat transferred to the pressing plate 422 is dissipated from the top wall body 421 to the non-waterproof space S6.

[0341] Thus, in Figure 42 and Figure 43 The electric shaver A shown (i.e., an example of a hair removal device) also has a drying mechanism 100 with a structure that is substantially the same as that of the electric shaver A (i.e., an example of a hair removal device) shown in the above embodiment.

[0342] By configuring an electric razor A (i.e., an example of a hair removal device) in this way, it is possible to achieve approximately the same function and effect as the electric razor A (i.e., an example of a hair removal device) shown in the above embodiment.

[0343] Figure 44 This is a perspective view of an electric shaver A, which is a second modification of a hair removal device. Figure 45 This is an exploded view showing an electric shaver A, a second modification of the hair removal device. It can also be set as... Figure 44 and Figure 45 The electric shaver A shown is an example of a hair removal device.

[0344] Figure 44 and Figure 45 The electric shaver A shown (i.e., an example of a hair removal device) is also a reciprocating type electric shaver A (i.e., an example of a hair removal device). In this electric shaver A (i.e., an example of a hair removal device), the base D (i.e., an example of the main body) has a head F. Furthermore, the head F has a head body F1, on which a blade part E is detachably mounted.

[0345] Furthermore, the lower base shell 10, which is continuously provided for the head F, has an elongated shape in the Z direction (i.e., the vertical direction), which is beneficial for use. Figure 44 and Figure 45When using the electric shaver A shown (i.e., an example of a hair removal device), the lower base housing 10 is held. Additionally, the battery 34 is housed inside the lower base housing 10 with its length direction approximately aligned with the Z-direction (i.e., the vertical direction).

[0346] Here, Figure 44 and Figure 45 The electric razor A shown (i.e., an example of a hair removal device) is an electric razor with three blades consisting of two mesh blade assemblies 51 and a slit blade assembly 53.

[0347] Furthermore, in Figure 44 and Figure 45 In the electric shaver A shown (i.e., an example of a hair removal device), the base D (i.e., an example of the main body) also includes a drying mechanism 100 for drying the non-waterproof space S6, and the drying mechanism 100 includes a film heater 101 (i.e., an example of a heating element) for generating heat. Specifically, in Figure 44 and Figure 45 In the electric shaver A shown (i.e., an example of a hair removal device), a non-waterproof space S6 is formed above the top wall body 421 on the upper side of the head body F1, which houses the linear motor 43 (i.e., an example of a motor). This non-waterproof space S6 allows the blade part E to be partially exposed, permitting the immersion of liquids such as water. Furthermore, a drying mechanism 100 is provided on the upper part of the top wall body 421. This drying mechanism 100 includes: a membrane heater 101 (i.e., an example of a heating element) that generates heat; and a heat dissipation member 102, to which the heat generated by the membrane heater 101 (i.e., an example of a heating element) is transferred, and the heat dissipation member 102 dissipates heat to the non-waterproof space S6. Moreover, in Figure 44 and Figure 45 The electric shaver A shown (i.e., an example of a hair removal device) also uses a pressing plate 422 as a heat dissipation member 102.

[0348] Thus, in Figure 44 and Figure 45 The electric shaver A shown (i.e., an example of a hair removal device) has a drying mechanism 100 with a structure that is substantially the same as that of the electric shaver A (i.e., an example of a hair removal device) shown in the above embodiment.

[0349] By configuring an electric razor A (i.e., an example of a hair removal device) in this way, it is possible to achieve approximately the same function and effect as the electric razor A (i.e., an example of a hair removal device) shown in the above embodiment.

[0350] Figure 46 This is a perspective view of an electric shaver A, which is a third modification of a hair removal device. Figure 47This is an exploded view showing an electric shaver A, which is a third modification of the hair removal device. Alternatively, it can also be set as... Figure 46 and Figure 47 The electric shaver A shown is an example of a hair removal device.

[0351] Figure 46 and Figure 47 The electric shaver A shown (i.e., an example of a hair removal device) is also a reciprocating type electric shaver A (i.e., an example of a hair removal device). In this electric shaver A (i.e., an example of a hair removal device), the base D (i.e., an example of the main body) has a head F. Furthermore, the head F has a head body F1, on which a blade part E is detachably mounted.

[0352] Furthermore, the lower base shell 10, which is continuously provided for the head F, has an elongated shape in the Z direction (vertical direction) for use. Figure 46 and Figure 47 When using the electric shaver A shown (i.e., an example of a hair removal device), the lower base housing 10 is held. Additionally, the battery 34 is housed inside the lower base housing 10 with its length direction approximately aligned with the Z-direction (i.e., the vertical direction).

[0353] Here, Figure 46 and Figure 47 The electric shaver A shown (i.e., an example of a hair removal device) is a five-blade electric shaver consisting of a mesh blade assembly 51, two fine shaving mesh blade assemblies 52, and two slit blade assemblies 53.

[0354] Furthermore, in Figure 46 and Figure 47 In the electric shaver A shown (i.e., an example of a hair removal device), the base D (i.e., an example of the main body) also includes a drying mechanism 100 for drying the non-waterproof space S6, and the drying mechanism 100 includes a film heater 101 (i.e., an example of a heating element) for generating heat. Specifically, in Figure 46 and Figure 47 In the electric shaver A shown (i.e., an example of a hair removal device), a non-waterproof space S6 is formed above the top wall body 421 on the upper side of the head body F1, which houses the linear motor 43 (i.e., an example of a motor). This non-waterproof space S6 allows the blade part E to be partially exposed, permitting the immersion of liquids such as water. Furthermore, a drying mechanism 100 is provided on the upper part of the top wall body 421. This drying mechanism 100 includes: a film heater 101 (i.e., an example of a heating element) that generates heat; and a heat dissipation member 102, to which the heat generated by the film heater 101 (i.e., an example of a heating element) is transferred, and the heat dissipation member 102 dissipates heat to the non-waterproof space S6. Moreover, in Figure 46 and Figure 47The electric shaver A shown (i.e., an example of a hair removal device) also uses a pressing plate 422 as a heat dissipation member 102.

[0355] Thus, in Figure 46 and Figure 47 The electric shaver A shown (i.e., an example of a hair removal device) has a drying mechanism 100 with a structure that is substantially the same as that of the electric shaver A (i.e., an example of a hair removal device) shown in the above embodiment.

[0356] By configuring an electric razor A (i.e., an example of a hair removal device) in this way, it is possible to achieve approximately the same function and effect as the electric razor A (i.e., an example of a hair removal device) shown in the above embodiment.

[0357] Figure 48 This is a perspective view of an electric shaver A, which is the fourth variation of a hair removal device. Figure 49 This is an exploded view showing the electric shaver A, the fourth modification of the hair removal device. It can also be set as... Figure 48 and Figure 49 The electric shaver A shown is an example of a hair removal device.

[0358] Figure 48 and Figure 49 The electric shaver A shown (i.e., an example of a hair removal device) is also a reciprocating type electric shaver A (i.e., an example of a hair removal device). In this electric shaver A (i.e., an example of a hair removal device), the base D (i.e., an example of the main body) has a head F. Furthermore, the head F has a head body F1, on which a blade part E is detachably mounted.

[0359] Furthermore, the lower base shell 10, which is continuously provided for the head F, has an elongated shape in the Z direction (i.e., the vertical direction), which is beneficial for use. Figure 48 and Figure 49 When using the electric shaver A shown (i.e., an example of a hair removal device), the lower base housing 10 is held. Additionally, the battery 34 is housed inside the lower base housing 10 with its length direction approximately aligned with the Z-direction (i.e., the vertical direction).

[0360] Here, Figure 48 and Figure 49 The electric shaver A shown (i.e., an example of a hair removal device) is a six-blade electric shaver consisting of two mesh blade assemblies 51, two fine shaving mesh blade assemblies 52, and two slit blade assemblies 53.

[0361] Furthermore, in Figure 48 and Figure 49In the electric shaver A shown (i.e., an example of a hair removal device), the base D (i.e., an example of the main body) also includes a drying mechanism 100 for drying the non-waterproof space S6, and the drying mechanism 100 includes a film heater 101 (i.e., an example of a heating element) for generating heat. Specifically, in Figure 48 and Figure 49 In the electric shaver A shown (i.e., an example of a hair removal device), a non-waterproof space S6 is formed above the top wall body 421 on the upper side of the head body F1, which houses the linear motor 43 (i.e., an example of a motor). This non-waterproof space S6 allows the blade part E to be partially exposed, permitting the immersion of liquids such as water. Furthermore, a drying mechanism 100 is provided on the upper part of the top wall body 421. This drying mechanism 100 includes: a film heater 101 (i.e., an example of a heating element) that generates heat; and a heat dissipation member 102, to which the heat generated by the film heater 101 (i.e., an example of a heating element) is transferred, and the heat dissipation member 102 dissipates heat to the non-waterproof space S6. Moreover, in Figure 48 and Figure 49 The electric shaver A shown (i.e., an example of a hair removal device) also uses a pressing plate 422 as a heat dissipation member 102.

[0362] Thus, in Figure 48 and Figure 49 The electric shaver A shown (i.e., an example of a hair removal device) has a drying mechanism 100 with a structure that is substantially the same as that of the electric shaver A (i.e., an example of a hair removal device) shown in the above embodiment.

[0363] By configuring an electric razor A (i.e., an example of a hair removal device) in this way, it is possible to achieve approximately the same function and effect as the electric razor A (i.e., an example of a hair removal device) shown in the above embodiment.

[0364] In addition, a small electric shaver that can be stored in the user's palm U21, which can be used with the main body covered by the palm U21, is an electric shaver with 6 blades.

[0365] Furthermore, in the above embodiments and their variations, a sheet-like membrane heater 101 (i.e., an example of a heating element) is exemplified by having through holes through which a pair of driving members 4324 pass respectively. However, the shape of the membrane heater 101 (i.e., an example of a heating element) is not limited to such a shape and can be configured in various shapes.

[0366] Figure 50 This is an exploded perspective view showing a first modified example of the drying mechanism according to the embodiment. For example, such as... Figure 50 As shown, a film heater 101 (i.e., an example of a heating element) can be configured as a roughly quadrilateral sheet. Figure 50In the example, the following structure is shown: two film heaters 101, which are approximately quadrilateral in shape (i.e., an example of heating elements), are respectively disposed on the drive member 4324 (for example, see reference 4324). Figure 43 On both sides of the Y direction (i.e., the width direction) of the ).

[0367] Figure 51 This is an exploded perspective view showing a second modified example of the drying mechanism. The shape of the film heater 101 (i.e., an example of the heating element) can also be set to... Figure 51 The shape shown. Figure 51 The membrane heater 101 shown (i.e., an example of a heating element) includes a pair of serpentine portions 101a formed on both sides in the Y direction (i.e., the width direction) and a connecting portion 101b connecting the rear ends of the pair of serpentine portions 101a. Furthermore, the connecting portion 101b is arranged to surround the rear of the drive member 4324, and the pair of serpentine portions 101a are respectively arranged on both sides of the drive member 4324 in the Y direction (i.e., the width direction). Additionally, in Figure 51 In this example, a serpentine section 101a is shown that snakes in the Y direction (i.e., the width direction), but the direction of snakening can be set to various directions such as the X direction (i.e., the front-to-back direction). Furthermore, the serpentine section 101a can also be formed by a vortex-like snake pattern. Additionally, in... Figure 51 In the example shown, the thickness of the lines in the serpentine section 101a and the connecting section 101b is approximately the same, but it is also possible to make the thickness of the lines in the serpentine section 101a and the connecting section 101b different. Furthermore, the structure can also be configured such that the connecting section makes... Figure 50 The two film heaters 101 (i.e., an example of heating elements) shown are connected in a generally quadrilateral sheet shape.

[0368] In addition, in the above embodiments and their variations, an example is shown in which the entire membrane heater 101 (i.e., an example of a heating element) is covered by a heat dissipation element 102. Figure 52 This is an exploded perspective view showing the third modified example of the drying mechanism. Figure 53 This is a perspective view showing the third modified example of the drying mechanism. (Example) Figure 52 and Figure 53 As shown, this also allows a portion of the membrane heater 101 (i.e., an example of a heating element) to be exposed from the heat dissipation element 102. Figure 52 and Figure 53 In this example, a structure is shown where two film heaters 101 (i.e., an example of heating elements) are respectively disposed on both sides of the drive member 4324 in the Y direction (i.e., the width direction), and the outer end 101c in the Y direction (i.e., the width direction) is exposed from the heat dissipation member 102. Furthermore, a structure can be provided as follows: Regarding Figure 52 and Figure 53The two film heaters 101 shown (i.e., an example of heating elements) are also connected by a connecting part.

[0369] Alternatively, it can be configured as follows: the membrane heater 101 (i.e., an example of a heating element) shown in the above embodiments and their variations can be configured as follows. Figure 50 The membrane heater 101 shown is an example of a heating element. Figure 51 A portion of the membrane heater 101 shown (i.e., an example of a heating element) is exposed from the heat dissipation element 102.

[0370] (Postscript)

[0371] Based on the description of the above embodiments, the following technology is disclosed.

[0372] (Technology 1) A hair removal device, comprising: a main body; a blade portion disposed in the main body and capable of removing hair; and a motor built into the main body to drive the blade portion, wherein the main body forms: a waterproof space for housing the motor and inhibiting liquid ingress; and a non-waterproof space for partially exposed blade portion, allowing liquid ingress, the main body including a drying mechanism for drying the non-waterproof space, the drying mechanism including a heating element for generating heat.

[0373] Thus, in the hair removal device of Technology 1, the main body includes a drying mechanism for drying a non-waterproof space. This non-waterproof space is configured with the blade section partially exposed, allowing liquid immersion. The drying mechanism includes a heating element. In this way, after cleaning the blade section with a liquid such as water, the drying mechanism can evaporate any remaining liquid in the non-waterproof space, drying the space. This more reliably prevents liquid residue from remaining in the non-waterproof space where the blade section is partially exposed. As a result, the generation of foul odors caused by liquid residue in the non-waterproof space can be suppressed, allowing for more hygienic use of the hair removal device.

[0374] (Technology 2) In the hair removal device described in Technology 1, the drying mechanism is configured to operate when the motor is not driven.

[0375] This allows the non-waterproof space to dry when the hair removal device has been cleaned but not yet removed.

[0376] (Technology 3) In the hair removal device described in Technology 1 or Technology 2, the main body includes a partition wall defining the non-waterproof space, and the drying mechanism is provided in the partition wall.

[0377] In this way, if the drying mechanism is located in the partition wall of the designated non-waterproof space, the impact of the heat generated by the drying mechanism on the motor can be more reliably suppressed.

[0378] (Technology 4) In the hair removal apparatus described in any one of Technologies 1 to 3, the blade portion includes: an outer blade, which is configured to partially expose the non-waterproof space; and an inner blade, which is configured within the non-waterproof space and in sliding contact with the outer blade, wherein the drying mechanism is located below the inner blade when the inner blade is located below the outer blade.

[0379] This allows the heat generated by the drying mechanism and rising in the non-waterproof space to come into contact with the inner blade, thus enabling more efficient evaporation of liquid adhering to the inner blade. As a result, liquid residue in the non-waterproof space can be more reliably prevented.

[0380] (Technology 5) In the hair removal device described in any one of Technologies 1 to 4, the drying mechanism includes a heat dissipation member, to which heat generated by the heating member is transferred and the heat dissipation member dissipates heat to the non-waterproof space.

[0381] In this way, even when the placement of the heating element is limited, the heat generated by the heating element can be dissipated from the heat dissipation element to a larger area of ​​the non-waterproof space. This increases the freedom of placement of the heating element and enables the non-waterproof space to dry more efficiently.

[0382] (Technology 6) In the hair removal device described in Technology 5, the main body includes a partition wall defining the non-waterproof space, and the heat dissipation member is provided on the partition wall such that it is at least partially exposed to the non-waterproof space.

[0383] This allows the heat generated by the heating element to be dissipated more efficiently from the heat dissipation element to the non-waterproof space, thus more reliably preventing liquid residue from remaining in the non-waterproof space.

[0384] (Technology 7) In the hair removal device described in Technology 6, the heating element is disposed between the heat dissipation element and the partition wall.

[0385] This allows heat generated by the heat-generating component to be directly transferred to the heat-dissipating component, thus enabling more efficient heat dissipation from the heat-dissipating component to the non-waterproof space. As a result, it more reliably prevents liquid residue from remaining in the non-waterproof space.

[0386] (Technology 8) In the hair removal device described in Technology 7, the entire heating element is covered by the heat dissipation element.

[0387] This prevents users from touching the heating element, so the hair removal device can be used more safely even when the blade is detachably mounted on the main body, exposing the non-waterproof space.

[0388] [other]

[0389] The above describes the hair removal device disclosed herein, but it is not limited to the above description. It is obvious to those skilled in the art that various modifications and improvements can be made.

[0390] For example, this disclosure can be applied to embodiments that modify, replace, add to, or omit the structures shown in the above embodiments and their variations. Furthermore, the constituent elements described in the above embodiments and their variations can be combined to create new embodiments.

[0391] Furthermore, in the above embodiments and their first, third, and fourth modifications, an electric razor A including a blade guard C (i.e., an example of a hair removal device) is illustrated, but this disclosure can also be applied to electric razors that do not include a blade guard C (i.e., an example of a hair removal device). Additionally, in the second modification of the above embodiments, an electric razor A that does not include a blade guard C (i.e., an example of a hair removal device) is illustrated, but this disclosure can also be applied to electric razors that include a blade guard C (i.e., an example of a hair removal device).

[0392] Furthermore, in the above embodiment, a first space S1 that is elongated in the Y direction (i.e., the width direction) is exemplified. However, for the first space S1, it can be elongated in any direction as long as it extends horizontally when the blade portion E and the base portion D (i.e., an example of the main body portion) are arranged vertically. That is, for the first space S1, it can be formed such that its length in the horizontal direction is longer than its length in the vertical direction when the electric razor A, in a state where the blade portion E and the base portion D (i.e., an example of the main body portion) are arranged vertically, is viewed from any direction parallel to the horizontal direction. Therefore, it is also possible to design a first space S1 that is L-shaped when viewed from above.

[0393] Furthermore, the structure for mounting the blade guard C to the device body B is not limited to the structure shown in the above embodiment, and can be configured in various ways. For example, it can be configured such that interlocking protrusions and recesses are provided between the blade guard C and the device body B, and the blade guard C is mounted to the device body B by mechanical engagement.

[0394] Furthermore, in the above embodiments and their modifications, a hair removal device is exemplified as one in which the inner blades 512, 522, and 532 reciprocate linearly relative to the outer blades 511, 521, and 531. However, this disclosure can also be applied to hair removal devices in which the inner blades rotate relative to the outer blades. That is, regardless of the blade driving method, this disclosure can be applied to any hair removal device that has a space where water can be immersed due to blade cleaning, etc.

[0395] Furthermore, in the above embodiments and their variations, an electric razor A (i.e., an example of a hair removal device) with a waterproof structure for the base D (i.e., an example of the main body) is exemplified. However, this disclosure can also be applied to electric razors (i.e., an example of a hair removal device) where the base D (i.e., an example of the main body) does not have a waterproof structure. In this case, the magnet mounted on the blade guard can also be placed in a non-waterproof space.

[0396] In addition, in the above embodiment, a structure is shown in which a switch button 13 (i.e., an example of an operating member) capable of switching the power supply is formed on the bottom wall 11 of the base D (i.e., an example of the main body). However, it is not limited to such a structure, and a switch button (i.e., an example of an operating member) can also be formed on the peripheral wall 12 of the base D.

[0397] In addition, in the above embodiment, an example is shown where a charging part (more specifically a USB terminal 3332) for inserting a charging cable 8 is formed on the peripheral wall 12 of the base D (i.e., an example of the main body). However, it is not limited to such a structure, and a charging part can also be formed on the bottom wall 11 of the base D.

[0398] In addition, in the above embodiments and their variations, an electric razor A with 5 blades (i.e., an example of a hair removal device) is shown, but the number of blades is not limited to 5, and can be 1 to 4 blades, or 6 or more blades.

[0399] Furthermore, in the above embodiments and their variations, an electric razor A for cutting beards is exemplified as a hair removal device, but it is not limited to an electric razor A. This disclosure can be applied to various types of hair removal devices. For example, this disclosure can also be applied to trimmers for cutting human or animal body hair (i.e., an example of an electric hair cutting device), and it can also be applied to hair removal devices for removing human or animal hair.

[0400] In addition, the specifications (e.g., shape, size, layout, etc.) of the main body, blade, and other details can also be changed appropriately.

[0401] Industrial availability

[0402] As described above, the hair removal device disclosed herein can more reliably suppress liquid residue in the non-waterproof space where the blade section is partially exposed, and therefore is not limited to beards, but can also be applied to the treatment of various body hairs.

Claims

1. A hair removal device, wherein, The hair removal device includes: Main body; A blade portion, located in the main body, is capable of removing hair; and A motor, built into the main body, drives the blade section. The main body includes: a waterproof space that houses the motor and prevents liquid ingress; and a non-waterproof space that allows the blade section to be partially exposed, permitting liquid ingress. The main body includes a drying mechanism for drying the non-waterproof space. The drying mechanism includes a heat-generating component.

2. The hair removal device according to claim 1, wherein, It is configured such that the drying mechanism operates when the motor is not driven.

3. The hair removal device according to claim 1 or 2, wherein, The main body includes a partition wall defining the non-waterproof space. The drying mechanism is provided in the partition wall.

4. The hair removal device according to claim 1 or 2, wherein, The blade portion includes: an outer blade configured to partially expose the non-waterproof space; and an inner blade configured within the non-waterproof space and in sliding contact with the outer blade. With the inner blade positioned below the outer blade, the drying mechanism is located below the inner blade.

5. The hair removal device according to claim 1 or 2, wherein, The drying mechanism includes a heat dissipation component, to which heat generated by the heating component is transferred and which dissipates heat to the non-waterproof space.

6. The hair removal device according to claim 5, wherein, The main body includes a partition wall defining the non-waterproof space. The heat dissipation component is provided on the partition wall so that at least part of it is exposed to the non-waterproof space.

7. The hair removal device according to claim 6, wherein, The heat-generating component is disposed between the heat-dissipating component and the partition wall.

8. The hair removal device according to claim 7, wherein, The entire heating element is covered by the heat dissipation element.

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