JP2006051146A - Electric razor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric razor capable of preventing loosening of a cutter holder from a mounting part or damage of part of the outer blade holder when the impact of falling or collision is applied by strengthening the fixing structure of the cutter holder to the mounting part. <P>SOLUTION: An inner wall 46 projecting downward is formed in a mounting opening 6a of the cutter holder 6, and a lock structure for inseparably locking/holding the cutter holder 6 is disposed between a body case 1 and the inner wall 46. A recess 47 for receiving the inner wall 46 and a restraining wall 48 for catching the inner wall 46 are disposed in the peripheral edge of the mounting part 21 in which the cutter holder 6 is mounted. The inner wall 46 and the restraining wall 48 are jointed with each other both on the inside and outside with the cutter holder 6 mounted in the mounting part 21, so that the inner wall 46 is caught and held by the restraining wall 48. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric razor provided with an outer blade holder, and is an improvement of the fixing structure of the outer blade holder attached to the razor head.

  Regarding the fixing structure of the outer blade holder according to the present invention, it is known in Patent Document 1 to provide a lock structure between the main body case and the outer blade holder. The outer blade holder is externally fitted to the razor head, and the lock claw of the lock member engages with an engagement protrusion provided on the inner surface of the outer blade holder to lock and hold the outer blade holder.

  With regard to the electric razor of the present invention, the basic structure of a razor head is known from Patent Document 2. In this case, a box-shaped drive base and a box-shaped base cover covering the upper surface opening are used as a base, a vibrator is arranged inside the motor base, and a motor is fixed to the lower surface of the drive base. The outer blade holder is mounted in a state of being fitted on the base lid, and is locked so as not to be separated by a lock body disposed on the inner surface of the side wall of the base lid. Note that the drive unit including the drive base, the base lid, and the motor is floatably supported so as to be tiltable, and can be tilted up and down, left and right, front and rear, or obliquely with respect to the main body case.

Japanese Utility Model Publication No. 6-32055 (page 3, column 5, lines 15-26, Fig. 1) JP 2003-117268 A (paragraph number 0026, FIG. 11)

  Many of the conventional outer blade holders are externally fitted to a mounting portion provided at the upper part of the razor, and the inner surface of the opening is received by the mounting portion, so that the mounting state can be maintained by a lock structure. Therefore, as long as proper usage is followed, the outer blade holder will not rattle or come off the mounting portion. However, when receiving an excessive drop impact or collision impact, the outer blade holder may come off from the mounting portion, or a part thereof may be damaged. In some cases, the fitting to the mounting portion becomes loose, the outer blade holder rattles, and the close contact between the outer blade and the inner blade may be insufficient.

  The object of the present invention is to strengthen the fixing structure of the outer blade holder with respect to the mounting portion so that the outer blade holder is detached from the mounting portion or a part thereof even in the case of receiving a drop impact or a collision impact. An object of the present invention is to provide an electric razor that can eliminate breakage and can also eliminate rattling of the outer blade holder.

  In the electric razor according to the present invention, the outer blade holder 6 is externally mounted on the mounting portion 21 provided at the upper portion of the razor, and an inner wall 46 protruding downward is formed in the mounting opening 6 a of the outer blade holder 6. A lock structure is provided between the main body case 1 and the inner wall 46 to lock and hold the outer blade holder 6 so as not to be separated. A recess 47 for receiving the inner wall 46 and a regulating wall 48 for receiving the inner wall 46 are formed on the periphery of the mounting portion 21. When the outer blade holder 6 is externally fitted to the mounting portion 21, the inner wall 46 and the regulating wall 48 are regulated. The wall 48 is joined to the inside and outside, and the inner wall 46 is received and held by the restriction wall 48.

  The lock structure described above engages the lock body 38, which is displaceably supported by the main body case 1 between the lock posture and the unlock posture, the engagement portion 39 formed on the inner surface of the inner wall 46, and the lock body 38. A lock claw 42 provided on the lock body 39 engages with the engagement portion 39 to lock and hold the outer blade holder 6.

  The inner wall 46 is formed of a tongue-like protruding wall, and the mounting portion 21 is formed with a recess 47 having the same shape as the inner wall 46. When the outer blade holder 6 is mounted on the mounting portion 21, the inner wall 46 and The outer blade holder 6 can be positioned and guided by engaging the recess 47 in advance.

  The lock claw 42 of the lock body 38 can be disposed in the recess 47 in a state of being positioned below the joint surface between the outer blade holder 6 and the mounting portion 21.

  A flange wall 20 for receiving the mounting opening 6a of the outer blade holder 6 is formed around the case lid 16 fixed to the upper part of the main body case 1, and the concave portion 47 and the inner wall 46 are fixedly held on the flange wall 20. And a regulating wall 48 to be formed.

  A mounting step 32 is provided on the inner surface of the upper opening of the main body case 1, and the flange wall 20 is fitted into the mounting step 32 from the upper surface side, and the peripheral surface of the regulation wall 48 is received and held by the step peripheral wall. can do.

  In the present invention, a lock structure is provided between the inner wall 46 provided on the outer blade holder 6 and the main body case 1 so that the outer blade holder 6 can be locked and held in a non-separable manner. In addition, a recess 47 for receiving the inner wall 46 and a regulating wall 48 for receiving the inner wall 46 are formed on the periphery of the mounting portion 21 to which the outer blade holder 6 is mounted, and the outer blade holder 6 is externally mounted on the mounting portion 21. In this state, the inner wall 46 can be received and held by the restriction wall 48, so that the inner wall 46 can be reliably restricted from being deformed outward by the restriction wall 48, and the mounting portion 21 of the outer blade holder 6 is correspondingly reduced. The fixing structure against can be strengthened. Therefore, according to the present invention, even when a drop impact or a collision impact acts on the electric razor, the outer blade holder 6 can be prevented from being detached from the mounting portion 21 or partially damaged. . The outer blade holder 6 does not rattle and the sharpness of the outer blade 7 and the inner blade 25 is not impaired.

  A lock structure is configured by a lock body 38 supported by the main body case 1, an engagement portion 39 formed on the inner surface of the inner wall 46, a spring 40 for urging the lock body 38, and the like provided on the lock body 39. When the outer claw holder 42 is engaged with the engaging portion 39 so that the outer blade holder 6 can be locked and held, the inner wall 46 is received by the regulating wall 48 in the process of mounting the outer blade holder 6 to the mounting portion 6. Since the position can be regulated, the lock claw 42 and the engaging portion 39 can be properly engaged. Further, when the outer blade holder 6 is mounted on the mounting portion 6, the inner wall 46 can be prevented from being deformed outward by the restriction wall 48. Thereby, it is possible to reliably prevent the engagement state between the lock claw 42 and the engagement portion 39 from being released, and to prevent the outer blade holder 6 from being separated from the mounting portion 21 due to an external force.

  If the inner wall 46 is formed of a tongue-like protruding wall and the concave portion 47 having the same shape as the inner wall 46 is formed in the mounting portion 21, the inner wall 46 and the concave portion 47 are mounted in the process of mounting the outer blade holder 6 to the mounting portion 21. And the outer blade holder 6 can be positioned and guided while correcting the position and posture of the inner wall 46 with the recess 47, so that the outer blade holder 6 can be easily attached to the mounting portion 21. For example, even when the side wall of the outer blade holder 6 is shifted to the front or back as viewed from the plane, the outer blade holder 6 can be mounted while being corrected to an appropriate mounting posture.

  A state in which the outer blade holder 6 is removed from the mounting portion 21 when the lock claw 42 of the lock body 38 is disposed in the recess 47 in a state of being positioned below the joint surface between the outer blade holder 6 and the mounting portion 21. In this case, it is possible to prevent the lock claw 42 from accidentally contacting the lock claw 42 or colliding with another object, thereby reliably preventing the lock claw 42 from being damaged or deformed or separated from the main body case 1.

  When the case lid 16 is fixed to the upper opening of the main body case 1 and the concave portion 47 and the regulation wall 48 are formed on the flange wall 20 provided around the case lid 16, the molding colors of the main body case 1 and the case lid 16 are made different. Thus, the appearance of the electric razor can be changed in various ways, and it becomes easy to provide an interesting appearance design. Compared with the case where the recess 47 and the regulation wall 48 are formed integrally with the main body case 1, there are advantages that the degree of freedom of the shape and structure is high and the strength of the regulation wall 48 can be easily increased as needed.

  A mounting step 32 is provided on the inner surface of the opening of the main body case 1, the flange wall 20 is fitted into the mounting step 32 from the upper surface side, and the outer blade holder 6 receives and holds the circumferential surface of the regulation wall 48 with the stepped peripheral wall. According to this fixing structure, the inner wall 46 can be received by the regulating wall 48 and the regulating wall 48 can be received and held by the peripheral wall of the mounting step 32 when the outer blade holder 6 is mounted on the mounting portion 21. Even when a large external force moment acts on the blade holder 6, the inner wall 46 is firmly received by the inner / outer double restriction wall 48 and the stepped peripheral wall, and the inner wall 46 is reliably restricted from being damaged or deformed. it can. Therefore, the outer blade holder 6 can be fixed and supported more firmly.

(Embodiment) FIGS. 1 to 8 show an embodiment of a reciprocating electric shaver according to the present invention. 2 and 3, the electric razor includes a cylindrical main body case 1 whose upper surface is open, and an operation unit 2 incorporated in the main body case 1.

  A switch knob 3 for starting the motor, a saw blade unit 4 (see FIG. 8), a switching knob 5 for operating the saw blade unit 4 up and down, and the like are assembled on the front and rear surfaces of the main body case 1. Reference numeral 6 denotes an outer blade holder, and a pair of front and rear outer blades 7 and 7 are arranged on the upper inner surface thereof. In FIG. 5, the outer blades 7 are assembled to the cassette frame 8 and supported by an inner case 9 attached to the inner surface of the outer blade holder 6 so as to be movable up and down.

  In FIG. 3, the operation unit 2 includes an electrical component part 2 </ b> A sealed in the main body case 1 and a head part 2 </ b> B exposed from the main body case 1, and is configured using the inner frame 10 as a base. Members constituting the electrical component part 2 </ b> A such as the motor 11, the secondary battery 12, and the circuit board 13 are assembled to the inner frame 10.

  4 and 5, a base frame 15 having a screw boss protrudes from an upper portion of a section where the motor 11 is mounted, and a case lid 16 is fastened and fixed by two screws 17 on the upper portion. ing. Between the base frame 15 and the case lid 16, a vibrator 18 that is reciprocally driven by motor power is disposed. The head portion 2B includes a case lid 16, a drive shaft 24, an inner blade 25, and the like which will be described later.

  In FIG. 4, the case lid 16 is composed of a horizontally long dish-like body that opens downward, and a flange wall 20 is formed around the upper surface thereof. The upper surface of the case lid 16 including the flange wall 20 is a mounting portion 21 for mounting the outer blade holder 6, and positioning protrusions 22 and 23 protrude from the front three places and the two rear parts of the case upper wall. It is set up. These positioning projections 22 and 23 receive the front and rear walls of the outer blade holder 6 mounted on the mounting portion 21 from the inner surface side (see FIGS. 6 and 7).

  The previous vibrator 18 includes a drive shaft 24 protruding above the case lid 16, and a pair of front and rear inner blades 25 are connected to the drive shaft 24. The drive shaft 24 and the case lid 16 are sealed in a watertight manner with a packing 26.

  The operation unit 2 loaded in the main body case 1 is fastened with a screw 29 (see FIG. 3) inserted through the bottom wall of the case and integrated with the main body case 1. In this fixed state, as shown in FIG. 1, the lower opening surface of the case lid 16 is internally fitted and fixed to a frame 30 protruding from the inner surface of the opening of the main body case 1, and at the same time the lower half of the peripheral surface of the flange wall 20 The fitting part 31 formed in a stepped shape is fitted in a mounting step part 32 formed on the inner surface of the opening of the main body case 1. As described above, when the operation unit 2 is fixed to the main body case 1 in a state where the lower opening surface of the case cover 16 is fitted in the frame 30, the case cover 16 can be firmly fixed to the main body case 1. Reference numeral 33 denotes a seal ring that seals the joint surface between the case lid 16 and the underframe 30.

  As described above, the outer blade holder 6 mounted on the mounting portion 21 is engaged and supported by a total of five positioning protrusions 22 and 23, and is locked and fixed in a non-separable manner by a lock structure. In FIG. 1, the lock structure includes a pair of left and right lock bodies 38 that are supported by the main body case 1 so as to be freely retractable, an engagement portion 39 formed on the outer blade holder 6 side, and the lock body 38 as an engagement portion 39. It is composed of a compression coil type spring 40 that locks and urges in the direction of engagement.

  The lock body 38 is formed of a plastic molded product in which a hook-shaped lock claw 42 is integrally formed on the inner surface of the operation button 41. The operation button 41 is fitted from the inside into a guide hole 43 provided in the left and right side walls of the main body case 1, and a spring 40 is interposed between the inner surface of the operation button 41 and the base frame 30. It is pushed and urged outward.

  The lock claw 42 engages with the engagement portion 39 in a recess 47 described later, but its upper end is located below the upper surface of the flange wall 20. This is for reliably preventing the lock claw 42 from coming into contact with another object and being damaged or deformed in a state where the outer blade holder 6 is removed from the mounting portion 21.

  In order to more firmly fix and support the outer blade holder 6 mounted on the mounting portion 21, downward inner walls 46 are formed on both the left and right sides of the mounting opening 6 a of the outer blade holder 6, and the flange wall of the case lid 16 is formed. 20, a recess 47 for receiving the inner wall 46 and a regulating wall 48 for receiving the outer surface of the inner wall 46 are provided.

  In FIG. 8, the inner wall 46 is formed of a tongue-like projection having an arcuate circumferential surface, and the engaging portion 39 is formed in the inner wall of the recess. The recess 47 has the same shape as the inner wall 46, and a claw groove 49 for projecting the lock claw 42 into the recess is formed in a vertically penetrating manner at the front and rear center of the inner wall.

  According to the electric razor having the above configuration, when the outer blade holder 6 is mounted on the mounting portion 21, the front and rear walls thereof are engaged and held by the five positioning protrusions 22 and 23, and the left and right inner walls 46 and the case lid 16 regulation walls 48 are joined to the inside and outside, and the inner wall 46 is received and held double by the regulation wall 48 and the step peripheral wall of the mounting step 32, so that the outer blade holder 6 is firmly fixed and supported, The inner wall 46 can be reliably restricted from being deformed. By forming the regulating wall 48 to be curved outwardly, there is an advantage that the structural strength of the regulating wall 48 itself can be improved and the inner wall 46 can be firmly backed up.

  Therefore, even when receiving a drop impact or a collision impact, it is possible to eliminate well that the outer blade holder 6 is detached from the mounting portion 21 or a part thereof is damaged, and the outer blade holder 6 is rattled. Can also be eliminated. In addition, since the lock claw 42 is engaged with the engagement portion 39 of the inner wall 46 received by the restriction wall 48 and the outer blade holder 6 is locked and held, the lock claw 42 and the engagement portion 39 are always properly fitted. It can be engaged in a state.

  In the above embodiment, the inner wall 46 is formed only on the left and right sides of the outer blade holder 6. For example, the inner wall 46 is formed by a curved wall having a semicircular cross section, or along the periphery of the mounting portion 21. The cross section that circulates around can be formed of a C-shaped peripheral wall or an endless ring-shaped peripheral wall. The inner wall 46 can be formed only on one of the left and right sides of the outer blade holder 6. The shape of the inner wall 46 does not need to be a tongue-like shape, and may be formed in an inverted trapezoidal shape or a rectangular shape. The engaging portion 39 of the lock structure can be formed by a protrusion.

  The restriction wall 48 can be formed on the inner surface of the opening of the main body case 1. The fitting portion 31 may be omitted, and the peripheral surface of the flange wall 20 may be directly fitted to the mounting step 32. The lock body 38 does not have to be a push button structure, and can be configured to be slidable. The present invention can also be applied to a rotary electric shaver.

It is sectional drawing which shows the mounting structure of an outer blade holder. It is a front view of an electric razor. It is an exploded front view of an electric razor. It is an exploded front view of a head part. It is a vertical front view of a head part. It is a perspective view which shows the relationship between an outer blade holder and its attachment. It is a cross-sectional top view of a head part. It is a disassembled side view of a head part.

Explanation of symbols

6 Outer blade holder 6a Outer blade holder mounting opening 16 Case lid 20 Flange wall 21 Mounting portion 32 Mounting step portion 38 Locking body 39 Engaging portion 40 Spring 42 Locking claw 46 Inner wall 47 Recessed portion 48 Restriction wall

Claims (6)

The outer blade holder (6) is externally fitted to the mounting part (21) provided on the upper part of the razor,
An inner wall (46) protruding downward is formed in the mounting opening (6a) of the outer blade holder (6),
A lock structure is provided between the body case (1) and the inner wall (46) to lock and hold the outer blade holder (6) in an inseparable manner.
A recess (47) for receiving the inner wall (46) and a regulation wall (48) for receiving the inner wall (46) are formed on the periphery of the mounting portion (21).
In a state where the outer blade holder (6) is mounted on the mounting portion (21), the inner wall (46) and the regulating wall (48) are joined inside and outside, and the inner wall (46) is received and held by the regulating wall (48). An electric razor characterized by that. A lock body (38) supported by the main body case (1) so as to be displaceable between a locked posture and an unlocked posture; an engaging portion (39) formed on the inner surface of the inner wall (46); A spring (40) for urging the lock body (38) to engage with the engaging portion (39);
The electric shaver according to claim 1, wherein the lock claw (42) provided on the lock body (38) engages with the engaging portion (39) to lock and hold the outer blade holder (6). The inner wall (46) is formed of a tongue-like projecting wall, and the mounting portion (21) is formed with a recess (47) having the same shape as the inner wall (46),
When the outer blade holder (6) is mounted on the mounting portion (21), the inner wall (46) and the recess (47) are engaged with each other in advance to position the outer blade holder (6). The electric shaver according to claim 1 or 2, which can be guided.   The lock claw (42) of the lock body (38) is disposed in the recess (47) in a state of being positioned below the joint surface between the outer blade holder (6) and the mounting portion (21). Or the electric shaver of 3. A flange wall (20) for receiving the mounting opening (6a) of the outer blade holder (6) is formed around the case lid (16) fixed to the upper part of the main body case (1).
The electric shaver according to claim 3 or 4, wherein the flange wall (20) is formed with the recess (47) and a regulating wall (48) for fixing and holding the inner wall (46). A mounting step (32) is provided on the inner surface of the upper opening of the body case (1),
The electric shaver according to claim 5, wherein the flange wall (20) is fitted into the mounting step portion (32) from the upper surface side, and the peripheral surface of the restriction wall (48) is received and held by the step portion peripheral wall.

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