JP4475500B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor in which an outer blade is formed into a cassette, and is an improved detachable structure of the outer blade and the outer blade holder.

  In an electric razor in which the outer blade is formed into a cartridge, it is known that the outer blade cassette and the outer blade holder are separately separated (Patent Document 1). There, a first locking mechanism for the outer blade holder is disposed between the razor head mounting portion and the outer blade holder, and a second locking mechanism for the outer blade cassette is provided between the outer blade holder and the outer blade cassette. Are arranged so that either the outer blade holder or the outer blade cassette can be separated by individually operating the lock release buttons of the respective lock mechanisms. In order to prevent the upper and lower buttons from being pushed in at the same time, a rib-like partition wall is provided between the two buttons.

Japanese Patent Laid-Open No. 10-235033 (paragraph numbers 0019 to 0020, FIG. 5)

  According to the two-button electric razor as described above, the outer blade holder and the outer blade cassette can be selectively separated, and the buttons for unlocking are not simultaneously pushed in by mistake. However, since it is necessary to provide the first lock mechanism for the outer blade holder and the second lock mechanism for the outer blade cassette, the internal structure of the razor head becomes complicated and the assembly takes time because of the large number of parts. In some cases, the manufacturing cost of the electric razor increases.

  An object of the present invention is to provide an electric razor capable of individually separating and operating an outer blade holder and an outer blade cassette with only one lock mechanism, simplifying the structure of the lock mechanism and reducing the manufacturing cost accordingly. It is in. The object of the present invention is to unlock one of the outer blade cassette and the outer blade holder, or to simultaneously unlock the outer blade cassette and the outer blade holder with one touch. An object of the present invention is to provide an electric razor that can be easily replaced or cleaned such as cleaning the inner surface of the outer blade cassette and the outer blade holder.

The electric razor of the present invention includes an outer blade holder 16 that is detachably attached to the attachment portion 23 of the razor head 2, and an outer blade cassette 34 that is detachably attached to the outer blade holder 16. Yes. A lock mechanism is provided between the outer blade holder 16 and the outer blade cassette 34 and the mounting portion 23 to lock the outer blade holder 16 and the outer blade cassette 34 so that they cannot be removed. The locking mechanism is provided between the attachment portion 23 of the razor head 2 and the outer blade holder 16, and the first engagement body 76 and the first lock portion 36 that lock and hold the outer blade holder 16, and the attachment portion 23 or A second engagement body 77 and a second lock portion 47 provided between the outer blade holder 16 and the outer blade cassette 34 to lock and hold the outer blade cassette 34, both engagement bodies 76 and 77, and both lock portions 36. And an operation button 75 for performing a disengagement operation of the engagement state with the 47. The operation button 75 locks the engagement state between the first engagement body 76 and the first lock portion 36 and the engagement state between the second engagement body 77 and the second lock portion 47. It is configured to be operable at the second release position where the release operation is performed . The operation button 75 is a push button that is guided and supported by the head frame 15 facing the attachment portion 23 so as to be slidable back and forth. When the unlocking operation is performed by pushing the operation button 75, the second engagement body 77 and the second lock portion 47 are disengaged by pushing the operation button 75 to the second release position, and the second release position is exceeded. a first engagement body 76 by operating push the operation button 75 to the first release position Te and the first locking portion 36 you characterized in that it is disengaged.

The first engagement body 76 and the second engagement body 77 are formed integrally with the operation button 75 and are urged to be locked by a spring 74.

A spring 57 is provided between the outer blade cassette 34 and the mounting portion 23 to push and bias the outer blade cassette 34 from the use position to the separation preparation position, and between the outer blade cassette 34 and the outer blade holder 16. Further, a pop-out preventing structure for preventing the outer blade cassette 34 from popping beyond the separation preparation position is provided.

The outer blade cassette 34 is formed with a second lock portion 47 that engages with the second engagement body 77, and the protrusion prevention structure has a protrusion 37 formed on the outer blade holder 16 and a vertical groove 88 that engages with the protrusion 37. The second lock groove 47 also serves as the vertical groove 88.

Another electric razor according to the present invention includes an outer blade holder 16 that is detachably attached to the attachment portion 23 of the razor head 2 and an outer blade cassette 34 that is detachably attached to the outer blade holder 16. I have. A lock mechanism is provided between the outer blade holder 16 and the outer blade cassette 34 and the mounting portion 23 to lock the outer blade holder 16 and the outer blade cassette 34 so that they cannot be removed. The locking mechanism is provided between the attachment portion 23 of the razor head 2 and the outer blade holder 16, and the first engagement body 76 and the first lock portion 36 that lock and hold the outer blade holder 16, and the attachment portion 23 or A second engagement body 77 and a second lock portion 47 provided between the outer blade holder 16 and the outer blade cassette 34 to lock and hold the outer blade cassette 34, both engagement bodies 76 and 77, and both lock portions 36. And an operation button 75 for performing a disengagement operation with respect to the engaged state with 47. The operation button 75 locks the engagement state between the first engagement body 76 and the first lock portion 36 and the engagement state between the second engagement body 77 and the second lock portion 47. It is configured to be operable at the second release position where the release operation is performed. The operation button 75 is a seesaw button that is swingably supported by the head frame 15 facing the mounting portion 23, and the first engagement body 76 is guided and supported so as to be slidable back and forth by the head frame 15, and is locked by a spring 74. Has been. The second engagement body 77 is formed in the cassette frame 40 of the outer blade cassette 34, and the first engagement body 76 and the second engagement body 77 are operated by pushing one end and the other end of the operation button 75 in the vertical direction. And can be disengaged alternatively.

The second engagement body 77 has a lock groove 95 that engages with the second lock portion 47 formed to protrude from the outer blade holder 16, and the protrusion prevention structure has a protrusion 37 formed on the outer blade holder 16, and It is composed of a longitudinal groove 88 which engages the projection 37, the locking groove 95 that serve as the longitudinal grooves 88.

The operation button 75 is provided so as to intersect with the joint surface of the outer blade holder 16 and the head frame 15, and the concave portion 35 corresponding to the upper half outline of the operation button 75 is cut on the joint surface of the outer blade holder 16. are outs formed, the operation button 75 and the recess 35, that also serves as a mounting guide when mounting the outer cutter holder 16 to the mounting portion 23.

  In the present invention, the first engagement body 76 and the first lock portion 36 that lock and hold the outer blade holder 16, the second engagement body 77 and the second lock portion 47 that lock and hold the outer blade cassette 34, and the both engagement bodies 76. A lock mechanism is configured by an operation button 75 for performing the engagement release operation of the engagement state between 77 and the lock portions 36 and 47, and the operation button 75 can be operated between the first release position and the second release position. Thus, the engagement state between the first engagement body 76 and the first lock portion 36 can be unlocked, or the engagement state between the second engagement body 77 and the second lock portion 47 can be unlocked.

  In the electric shaver according to the present invention, the outer blade holder 16 and the outer blade cassette 34 can be locked and unlocked by only one set of locking mechanisms, so that each of the outer blade holder and the outer blade cassette is provided. Accordingly, as compared with the conventional structure in which a dedicated locking mechanism is provided, the structure of the locking mechanism is remarkably simplified, and the labor for assembling can be saved correspondingly, so that the manufacturing cost of the electric shaver can be reduced as a whole. Since the structure can be simplified, the possibility of failure of the lock mechanism can be reduced. Since the locked state of the outer blade holder 16 and the outer blade cassette 34 can be released with only one operation button 75, the operability can be improved compared to the conventional structure in which the two operation buttons need to be used separately. The appearance of the razor head 2 can be made clear.

Either the outer blade cassette 34 or the outer blade holder 16 can be unlocked, or the locked state of the outer blade cassette 34 and the outer blade holder 16 can be simultaneously unlocked by one touch if necessary. such as maintenance and replacement of the cutting blade, easy unlocking operation necessary parts in accordance with the type of work, even Ru advantageous der in that enables rapid or replacement of the maintenance work and the cutting blade.

When the operation button 75 is unlocked, the second engagement body 77 and the second lock portion 47 are disengaged by pushing the operation button 75 to the second release position, and beyond the second release position, the second release position is reached. According to the lock mechanism in which the first engagement body 76 and the first lock portion 36 are disengaged by pushing the operation button 75 to the 1 release position, the outer blade cassette 34 and the outer blade holder 16 Can be unlocked in the order of description, so that when the outer blade unit 41 is cleaned or the lubricant is replenished, only the outer blade cassette 34 that is the work target is separated, and the labor of the cleaning operation and the like can be reduced. . Since only the outer blade cassette 34 can be separated while the outer blade holder 16 is mounted on the mounting portion 23, when the outer blade cassette 34 is separated, the dust attached to the inner blade 56 and its peripheral portion is exposed to the periphery. The outer blade holder 16 prevents the dust from being scattered so that the waste can be disposed of in a sanitary manner, and the outer blade holder 16 can protect the periphery of the inner blade 56 in a state where the outer blade cassette 34 is separated. When once pushing the operation button 75, most Ru can unlock operation simultaneously and outer blade cassette 34 and outer cutter holder 16.

According to the lock mechanism in which the operation button 75 is formed of a push button and the first engagement body 76 and the second engagement body 77 are formed integrally with the operation button 75, the operation button 75 and both engagement bodies 76 and 77 are integrated. The lock piece 73, the spring 74 for urging the lock piece 73 and the guide structure of the lock piece 73, and the lock mechanism can be configured with the minimum number of members, and the structure can be further simplified. in addition Ru can reduce the manufacturing cost of the electric razor omitted effort of assembly.

The operation button 75 is constituted by a seesaw button, and the first engagement body 76 and the second engagement body 77 can be selectively disengaged by pushing one end and the other end of the operation button 75. According to the mechanism, the outer blade cassette 34 and the outer blade holder 16 can be unlocked in the order described, and the outer blade holder 16 can be unlocked with the outer blade cassette 34 mounted. , maintenance cleaning and cutting blade, advantages and outer blade cassette 34 and outer cutter holder 16 can be separated operation there Ru depending on the content of the work.

In an electric shaver provided with a spring 57 that pushes and urges the outer blade cassette 34 from the use position to the separation preparation position, a lock mechanism is provided in which a pop-out prevention structure is provided between the outer blade cassette 34 and the outer blade holder 16. Accordingly, when only the outer blade cassette 34 is unlocked, the outer blade cassette 34 is received by the pop-out prevention structure even when the outer blade cassette 34 is vigorously moved upward due to the elastic force of the spring 57. Therefore, it is possible to reliably prevent the outer blade cassette 34 from jumping out of the outer blade holder 16 and falling to the floor surface, and to prevent scattering of fouling due to the outer blade cassette 34 jumping out. The

The protrusion 37 formed on the outer blade holder 16 and the vertical groove 88 engaged with the protrusion 37 constitute a pop-out preventing structure, and the second lock portion 47 provided on the outer blade cassette 34 also functions as the previous vertical groove 88 According to the lock mechanism, the pop-out prevention function can be added while avoiding the complexity of the structure by adding the pop-out prevention structure, and thus the electric mechanism while avoiding unnecessarily complicated structure of the lock mechanism. Ru can improve the usability of the razor.

The operation button 75 is provided in a state of intersecting with the joint surface of the outer blade holder 16 and the head frame 15, and the concave portion 35 corresponding to the upper half outline of the operation button 75 is cut out on the joint surface of the outer blade holder 16. According to the lock mechanism, the outer blade holder 16 can be mounted on the mounting portion 23 while guiding the recess 35 with the operation button 75, so that, for example, the outer blade holder 16 can be assembled to the mounting portion 23 while being displaced forward and backward. Even in this case, the outer blade holder 16 can be always assembled at an appropriate position while correcting the position. Further, the outer blade holder 16 is forcibly assembled to the mounting portion 23 with an inappropriate posture, and the contact state between the outer blade 52 and the inner blade 56 remains improper, and the electric razor is used for shaving. Ru can be reliably prevented.

  1 to 11 show an embodiment of an electric shaver according to the present invention. In FIG. 2, the electric razor is composed of a main body case 1 whose upper and lower middle portions are constricted and an operation unit assembled to the main body case 1 as main components. The operation unit includes an electrical component part housed in the main body case 1 and a razor head 2 at the top of the main body case 1.

  A decorative panel 3 is provided on the front surface of the main body case 1, and a switch knob 4 for starting the motor and a display panel 5 that displays light emission only at the time of charging are provided above and below the decorative panel 3. On the rear surface of the main body case 1, a saw blade unit 6 and a switching knob 7 for raising and lowering the saw blade unit 6 are provided. As shown in FIG. 2, an electrical component part including a motor 10, a secondary battery 11, and a circuit board is accommodated in the main body case 1 and sealed with a case packing 12.

  In FIG. 3, the razor head 2 has a hollow box-shaped head frame 15 and an outer blade holder 16 attached to and detached from the head frame 15 as main structures, and the structure 10 includes a motor 10 and a vibrator 17. A mechanism and a pair of front and rear main blades 18 and a center blade 19 are incorporated. As shown in FIG. 1, the axle center of the razor head 2 viewed from the side is inclined toward the front side of the main body case 1. The motor 10 is loaded into the motor holder 20 and fastened to the lower surface of the head frame 15 together with the motor holder 20.

  As shown in FIGS. 3 and 4, a cam mechanism 21 that is rotationally driven by the motor 10 and a pair of front and rear vibrators 17 and 17 are arranged inside the head frame 15. Thus, the rotational power of the motor 10 is converted into a reciprocating operation, and the main blade 18, the center blade 19, and the wrinkle blade unit 6 are driven to reciprocate. The upper surface opening of the head frame 15 is closed by a frame cover 22, and the mounting portion 23 of the outer blade holder 16 is configured by the front and rear, left and right peripheral surfaces of the frame cover 22 and the peripheral edge portion of the upper end wall of the head frame 15. Yes.

  The front and rear vibrators 17 are each provided with a drive shaft 25 for the main blade 18, and are driven in opposite directions to cancel the movement inertia force. In FIG. 3, the front drive shaft 25 is provided with a drive shaft 26 for the center blade 21, and the rear drive shaft 25 is provided with a drive arm 27 for the scraper blade unit 6. In FIG. 3, reference numeral 28 is a packing for the drive shaft 25, and 29 is a packing for the output shaft of the motor 10.

  In FIG. 5, the outer blade holder 16 is composed of a frame body having a pair of left and right side frames 32 and a front and rear horizontal frame 33 that connects the lower portions of the side frames 32 and having an open top and bottom surface. An outer blade cassette 34 is detachably incorporated inside. A concave portion 35 is formed along the upper half outline of the operation button 75 described later at the center lower portion of the side frame 32, and a first lock groove (first A lock portion 36 is formed as a recess (see FIGS. 1 and 7). Above the inner surface of the recess 35, a lateral rib-shaped protrusion 37 and a positioning rib 38 made of a vertical rib are formed. The outer blade holder 16 is attached to the previous mounting portion 23 from above.

  The outer blade cassette 34 includes a cassette frame 40, an outer blade unit 41 assembled before and after the cassette frame 40, and a center blade 19 disposed between both outer blade units 41. The cassette frame 40 is formed in a frame shape in which the upper and lower surfaces are opened by a pair of left and right side frames 42 and the front and rear horizontal frames 43 connecting the lower portions of the side frames 42, as in the outer blade holder 16. A little smaller than the holder 16. Between the left and right side frames 42, a reinforcing frame 44 that crosses the front and rear center of the cassette frame 40 to the left and right is integrally provided (see FIG. 5).

  Engagement legs 46 project from the lower center of both side frames 42, and rectangular second lock grooves (second lock portions) 47 that engage with second engagement claws 77 described later are formed therethrough. (See FIG. 7). A vertical groove 48 that engages with the previous positioning rib 38 is formed at the upper center of the left and right side frames 42, and a guide projection 49 that restricts the upward movement of the outer blade unit 41 is formed on the inner surface thereof. . A guide wall 50 is projected from the center of the inner surface of the front and rear horizontal frames 45. These guide protrusions 49 and guide walls 50 guide and support the front and rear outer blade units 41 so as to be slidable up and down with respect to the cassette frame 40 (see FIG. 9).

  In FIG. 5, the outer blade unit 41 includes an outer blade 52 formed of a sheet-like mesh blade and an outer blade frame 53 that holds the outer blade 52 in an arch shape. On the outer surfaces of the left and right side walls of the outer blade frame 53, vertical grooves 54 are formed that are slidably guided by the guide protrusions 49, and slide protrusions 55 are formed on the front wall or the rear wall facing the guide wall 50. The outer blade 52 and the inner blade 56 attached to the drive shaft 25 constitute the main blade 18. As shown in FIG. 4, the inner blade 56 is formed of a slit blade, and is retained in an inverted U shape by the inner blade frame 58. The inner blade frame 58 is pushed up and biased by a compression coil spring 57 incorporated in the drive shaft 25 and can always be in close contact with the outer blade 52. A round shaft-shaped passive piece 59 that is engaged and connected to the drive shaft 25 is formed on the center inner surface of the inner blade frame 58.

  In order to support the front and rear outer blade units 41 attached to the cassette frame 40 so as to be able to float up and down, a pair of left and right elastic arms 62 extending laterally is provided on each of the front and rear surfaces of the reinforcing frame 44, and the front ends thereof are externally mounted. It engages with a horizontally long slot 63 provided in the horizontal frame 43 of the blade frame 53 (see FIG. 4). The outer blade unit 41 attached to the cassette frame 40 is pushed up and biased by the elastic arm 62, the lower end of the vertical groove 54 is received by the guide projection 49 (see FIG. 4), and the upper surface of the slide projection 55 is the guide wall. It is received by 50 retaining ribs.

  In FIG. 6, the center blade 19 includes an outer center blade 65, an inner center blade 66, and a blade receiving frame 20 that fixedly supports the outer center blade 65, each formed as a slit blade. Engagement legs 68 provided on the left and right sides of the blade receiving frame 20 are engaged and fitted in engagement grooves 69 (see FIG. 5) provided on the inner surfaces of the left and right side frames 42 of the cassette frame 40, and further, the blade receiving frame 67 and the reinforcing frame 44. A pair of left and right compression coil springs 70 are interposed between the center blade 19 and the center blade 19 so as to be able to float up and down.

  A lock mechanism is provided between the outer blade holder 16 and the mounting portion 23 in order to lock and hold the outer blade holder 16 and the outer blade cassette 34 attached to the mounting portion 23 of the razor head 2 in an inseparable manner. . In FIG. 8, the lock mechanism includes a lock piece 73 provided between both sides of the attachment portion 23 and the outer blade holder 16, and a compression coil spring 74 that urges the lock piece 73 to lock.

  In FIG. 8, the lock piece 73 includes an operation button 75 composed of an egg-shaped push button, a first engagement claw (first engagement body) 76 projecting forward and backward on the inner surface side, and a front and rear engagement. It consists of a plastic molded product in which a second engaging claw (second engaging body) 77 provided laterally between the engaging claws 76 and a slide groove 78 provided below the engaging claws 76 are integrally formed. . The second engagement claw 77 protrudes upward from the first engagement claw 76 and is formed at a position shifted further inward from the first engagement claw 76. Reference numeral 79 denotes a spring hole for receiving the spring 74.

  In order to guide and support the lock piece 73 so as to be slidable in the left and right directions, a recess 83 for receiving the lower half of the operation button 75 is formed on both the left and right sides of the skirt wall 82 surrounding the upper periphery of the head frame 15. An adjacent upper end wall is cut out to form a guide wall 84. As shown in FIG. 1, the slide groove 78 of the lock piece 73 is slid and guided by the guide wall 84, and the ends of the spring 74 loaded in the spring receiving hole 79 are received by the left and right spring seats 85 of the head frame 15. The entire lock piece 73 can be urged to move toward the lock engagement posture.

  The first engagement claw 76 engages with the first lock groove 36 provided in the outer blade holder 16 to lock the outer blade holder 16 so that it cannot be separated, and the second engagement claw 77 is provided in the cassette frame 40. The outer cutter cassette 34 is locked and fixed so as not to be separated by engaging with the second lock groove 47. When the operation button 75 is pushed in against the urging force of the spring 74, the engagement state between the second engagement claw 77 and the second lock groove 47 is released as shown in FIG. It is unlocked. However, the first engagement claw 76 and the first lock groove 36 are maintained in the engaged state, and the outer blade holder 16 is held in the locked state. The pressing position of the operation button 75 at this time is set as a second release position.

  The outer blade cassette 34 before being unlocked is urged upward by receiving the elastic force of the spring 57 for the inner blade 56. Therefore, when the engagement state between the second engagement claw 77 and the second lock groove 47 is released as described above, the outer blade cassette 34 is guided by the outer blade holder 16 and slides upward, and the cassette frame 40 rises from the outer blade holder 16. The entire outer blade cassette 34 can be removed from the outer blade holder 16 by pinching the front and rear surfaces of the cassette frame 40 in this state and pulling it upward. When the operation button 75 is pushed further beyond the second release position, the engagement state between the first engagement claw 76 and the first lock groove 36 is released as shown in FIG. 10, and the outer blade holder 16 is unlocked. Is done. When the outer blade holder 16 is removed, the left and right surfaces (outer frame 32) of the outer blade holder 16 are pinched and removed upward while pressing the operation button 75. The pushing position of the operation button 75 at this time is defined as a first release position. When the operation button 75 is pushed all the way to the first release position, both the outer blade cassette 34 and the outer blade holder 16 can be unlocked almost simultaneously.

  As described above, when the operation button 75 is pushed down to the second release position, the outer blade cassette 34 is lifted upward from the use position. However, if the outer blade cassette 34 moves upward vigorously, the outer blade cassette 34 There is a risk of jumping out of the blade holder 16. In order to prevent the outer blade cassette 34 from jumping out, a pop-out prevention structure is provided between the outer blade cassette 34 and the outer blade holder 16.

  In FIG. 1, the pop-out prevention structure is constituted by a protrusion 37 formed on the inner surface of the side frame 32 of the outer blade holder 16 and a vertical groove 88 provided on the engaging leg 46 of the cassette frame 40. In a state where the outer blade cassette 34 is mounted on the outer blade holder 16 (the state shown in FIG. 4), the protrusion 37 is engaged with the upper end portion of the vertical groove 88. Therefore, even if the outer blade cassette 34 moves upward vigorously, the lower edge portion of the longitudinal groove 88 is received by the projection 37 as shown in FIG. 1, so that the outer blade cassette 34 cannot move any further, thus preventing popping out. it can.

  That is, the outer blade cassette 34 is held at the separation preparation position where the lower end portion of the vertical groove 88 is received by the protrusion 37. In this embodiment, the second lock groove 47 also serves as the vertical groove 88 by forming the second lock groove 47 through the wall of the engaging leg 46. When the outer blade cassette 34 is removed from the outer blade holder 16, the engaging legs 46 get over the protrusion 37 while elastically deforming by pinching the front and rear surfaces of the cassette frame 40, so that the outer blade cassette 34 is removed. It can be removed from the blade holder 16 without any problem.

  When the outer blade holder 16 removed for cleaning or the like is reattached to the attachment portion 23, the outer blade holder 16 is incorporated into the attachment portion 23 from above as shown in FIG. At this time, since the concave portion 35 contacts the peripheral surface of the operation button 75 at the same time that the outer blade holder 16 is fitted into the mounting portion 23, the concave portion 35 is operated even if the front and rear positions of the outer blade holder 16 are misaligned. The deviation can be corrected by being guided by the button 75, and the outer blade holder 16 can be always properly assembled to the mounting portion 23.

  FIG. 12 shows another embodiment of the locking mechanism. In this case, the operation button 75 is constituted by a seesaw button so that the first engagement claw 76 and the second engagement claw 77 can be selectively disengaged. The operation button 75 is integrally provided with a button main body 90, a first operation claw 91 projecting from the lower inner surface of the button main body 90, and a second operation claw 92 projecting from the upper inner surface of the button main body 90. The shaft 93 provided on the front and rear surfaces of the button main body 90 is pivotally supported by the head frame 15 so that the entire operation button 75 is supported so as to be able to tilt the seesaw and is urged to return to the neutral position by a spring (not shown).

  The first engaging claw 76 is configured as an independent part different from the operation button 75, and the slide groove 78 is guided and supported by the guide wall 84 so as to be slidable left and right as in the previous embodiment. The second engagement body 77 is formed on the cassette frame 40. Specifically, the engagement leg 46 of the cassette frame 40 is used as the second engagement body 77, and a rectangular lock groove 95 is formed on the wall surface. In order to engage and hold the lock groove 95, a second lock portion 47 is formed to protrude from the inner surface of the side frame 32 of the outer blade holder 16. The lock groove 95 also serves as the vertical groove 88.

  In a state where the outer blade holder 16 with the outer blade cassette 34 assembled is mounted on the mounting portion 23, the operation button 75 is in a neutral position, and the first operation claw 91 is located at the lower side end of the first engagement claw 76. The second operating claws 92 are in contact with the lower side ends of the second engaging claws 77, respectively. From this state, for example, when the upper half side of the operation button 75 is pushed in, the second operation claw 92 is displaced inward while elastically deforming the second engagement claw 77, and the second lock groove 47 and the second engagement claw The outer blade cassette 34 can be unlocked by releasing the engaged state with the joint portion 95 (second release position). Conversely, when the lower half side of the operation button 75 is pushed in, the first operation claw 91 slides the first engagement claw 76 against the spring 74, and the first engagement claw 76 and the first lock groove The outer blade holder 16 can be unlocked by releasing the engaged state with 36 (first release position). Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

  FIG. 13 shows still another embodiment of the locking mechanism. In this case, the operation button 75 is constituted by a push button so that the second engagement body 77 and the first engagement claw 76 can be disengaged in the order described. The lock piece 73 includes an operation button 75, a first engagement claw 76, and an operation protrusion 97 projecting from the upper part of the inner surface of the operation button 75, and these members are integrally formed. By sliding and guiding the slide groove 78 with the guide wall 84, the lock piece 73 is supported so as to be slidable to the left and right. Similar to the locking mechanism of FIG. 12, the engaging leg 46 of the cassette frame 40 is used as the second engaging body 77, a rectangular lock groove 95 is formed on the wall surface, and the inner surface of the side frame 32 of the outer blade holder 16 is formed. The second lock portion 47 was formed to protrude. The same is true in that the lock groove 95 also serves as the vertical groove 88.

  When the operation button 75 is pushed in against the urging force of the spring 74 in a state where the outer blade holder 16 assembled with the outer blade cassette 34 is attached to the mounting portion 23, as shown in FIG. 77 is pushed by the operation projection 97 and elastically deforms, the engagement state between the lock groove 95 and the second lock portion 47 is released, and the outer blade cassette 34 is unlocked. However, the first engagement claw 76 and the first lock groove 36 are maintained in the engaged state, and the outer blade holder 16 is held in the locked state. The pressing position of the operation button 75 at this time is set as a second release position. The unlocked outer blade cassette 34 is pushed up by a spring 57 that pushes up and biases the inner blade 56. However, as in the previous embodiment, the lower end portion of the vertical groove 88 is received by the projection 37 and separated. The position is held at the preparation position.

  When the operation button 75 is pushed further beyond the second release position, the engagement state between the first engagement claw 76 and the first lock groove 36 is released, and the outer blade holder 16 is unlocked. The pushing position of the operation button 75 at this time is the first release position. When the operation button 75 is pushed all the way to the first release position, both the outer blade cassette 34 and the outer blade holder 16 can be unlocked almost simultaneously. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

  According to the lock mechanism configured as described above, when the outer blade holder 16 is separated from the mounting portion 23, the outer blade cassette 34 can also be unlocked at the same time to separate both 16 and 34. The inner surface of the outer blade cassette 34 can be cleaned to every corner, and the dust that has entered the joint gap between the two 16 and 34 can be easily removed.

  In the above embodiment, the second lock groove 47 also serves as the vertical groove 88, but the vertical groove 88 can be provided separately from the second lock groove 47. The operation button 75 may be formed of a slide button in addition to a push button or a seesaw button. For example, the outer blade holder 16 and the outer blade cassette 34 can be configured to be individually unlocked when sliding from the neutral position to one side and when sliding to the other side. It is sufficient that at least one main blade 18 is incorporated in the outer blade holder 16, and the outer blade frame 53 can also serve as the cassette frame 40 of the outer blade cassette 34 in that case. The outer blade cassette 34 can be pushed up and biased by a dedicated spring.

It is a vertical front view which shows the locking mechanism of an outer blade holder and an outer blade cassette. It is a front view of an electric razor. It is a vertical side view of a razor head. It is a vertical front view of a razor head. It is a disassembled perspective view of a razor head. It is a disassembled front view of a razor head. It is an exploded sectional view of a razor head. It is a disassembled perspective view of a locking mechanism. It is a cross-sectional top view of a razor head. It is a vertical side surface which shows the removal state of an outer blade holder. It is a side view which shows the attachment middle state of an outer blade holder. It is sectional drawing which shows another Example of a locking mechanism. It is sectional drawing which shows another Example of a locking mechanism.

Explanation of symbols

2 Razor head 15 Head frame 16 Outer blade holder 23 Mounting portion 34 Outer blade cassette 35 Recess 36 First lock portion 37 Projection 40 Cassette frame 47 Second lock portion 57 Spring 75 Operation button 76 First engagement body 77 Second engagement body 88 Vertical groove

Claims (8)

An outer blade holder (16) detachably attached to the attachment portion (23) of the razor head (2), and an outer blade cassette (34) detachably attached to the outer blade holder (16). With
A lock mechanism is provided between the outer blade holder (16) and the outer blade cassette (34) and the mounting portion (23) to lock the outer blade holder (16) and the outer blade cassette (34) so that they cannot be removed. And
The lock mechanism is provided between the attachment portion (23) of the razor head (2) and the outer blade holder (16), and the first engagement body (76) and the first engagement member for locking and holding the outer blade holder (16). A lock portion (36);
A second engagement body (77) and a second lock portion (32) provided between the mounting portion (23) or the outer blade holder (16) and the outer blade cassette (34) to lock and hold the outer blade cassette (34). 47)
And an operation button (75) for releasing the engagement between the engagement bodies (76, 77) and the lock portions (36, 47),
A first release position where the operation button (75) unlocks the engagement state between the first engagement body (76) and the first lock portion (36), and the second engagement body (77) and the second lock portion. (47) is configured to be operable to a second release position for unlocking operation .
The operation button (75) is a push button guided and supported by the head frame (15) facing the mounting portion (23) so as to be slidable back and forth.
When the unlocking operation is performed by pushing the operation button (75), the second engagement body (77) and the second lock portion (47) are engaged by pushing the operation button (75) to the second release position. Released,
An electric shaver that disengages the first engagement body (76) and the first lock portion (36) by pushing the operation button (75) beyond the second release position to the first release position . The electric shaver according to claim 1, wherein the first engaging body (76) and the second engaging body (77) are formed integrally with the operation button (75) and are urged by a spring (74) . A spring (57) is provided between the outer blade cassette (34) and the mounting portion (23) to push and bias the outer blade cassette (34) from the use position to the separation preparation position.
Between the outer blade cassette (34) and outer cutter holder (16), separating the ready position of claim 1 or 2, wherein prevention structure popping prevent outer blade cassette (34) popping are provided beyond Electric razor. The outer blade cassette (34) is formed with a second lock portion (47) that engages with the second engagement body (77),
The pop-out prevention structure is composed of a protrusion (37) formed on the outer blade holder (16) and a vertical groove (88) engaged with the protrusion (37).
The electric shaver according to claim 3, wherein the second lock portion (47) also serves as a longitudinal groove (88) . An outer blade holder (16) detachably attached to the attachment portion (23) of the razor head (2), and an outer blade cassette (34) detachably attached to the outer blade holder (16). With
A lock mechanism is provided between the outer blade holder (16) and the outer blade cassette (34) and the mounting portion (23) to lock the outer blade holder (16) and the outer blade cassette (34) so that they cannot be removed. And
The lock mechanism is provided between the attachment portion (23) of the razor head (2) and the outer blade holder (16), and the first engagement body (76) and the first engagement member for locking and holding the outer blade holder (16). A lock portion (36);
A second engagement body (77) and a second lock portion (32) provided between the mounting portion (23) or the outer blade holder (16) and the outer blade cassette (34) to lock and hold the outer blade cassette (34). 47), and an operation button (75) for performing a disengagement operation of the engagement state between both engagement bodies (76, 77) and both lock portions (36, 47),
A first release position where the operation button (75) unlocks the engagement state between the first engagement body (76) and the first lock portion (36), and the second engagement body (77) and the second lock portion. (47) is configured to be operable to a second release position for unlocking operation.
The operation button (75) is a seesaw button that is swingably supported by the head frame (15) facing the mounting portion (23),
The first engaging body (76) is guided and supported by the head frame (15) so as to be slidable in a reciprocating manner, and is locked and biased by a spring (74).
The second engagement body (77) is formed on the cassette frame (40) of the outer blade cassette (34),
An electric shaver that can selectively disengage the first engagement body (76) and the second engagement body (77) by pushing one end and the other end of the operation button (75) in the vertical direction . A spring (57) is provided between the outer blade cassette (34) and the mounting portion (23) to push and bias the outer blade cassette (34) from the use position to the separation preparation position.
6. An electric shaver according to claim 5, wherein a protrusion preventing structure is provided between the outer blade cassette (34) and the outer blade holder (16) to prevent the outer blade cassette (34) from jumping beyond the separation preparation position. . The second engagement body (77) has a lock groove (95) that engages with a second lock portion (47) formed to protrude from the outer blade holder (16).
The pop-out prevention structure is composed of a protrusion (37) formed on the outer blade holder (16) and a vertical groove (88) engaged with the protrusion (37).
The electric shaver according to claim 6, wherein the locking groove (95) also serves as a longitudinal groove (88) . The operation button (75) is provided in a state of intersecting the joint surface of the outer blade holder (16) and the head frame (15),
On the joint surface of the outer blade holder (16), a recess (35) corresponding to the upper half outline of the operation button (75) is cut out,
The electric shaver according to any one of claims 1 to 7, wherein the operation button (75) and the recess (35) also serve as a mounting guide for mounting the outer blade holder (16) on the mounting portion (23).

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