JP5190874B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor in which a circuit board and a battery are arranged inside a main body case that also serves as a grip.

  A recent trend of electric razors is that the size of the razor head is almost constant, but the main body case is becoming larger. This is because the control circuit becomes larger due to the expansion of the visual display function by the LED and the diversification of the operation mode at the time of shaving, and a larger circuit board is required accordingly. It is a cause. In addition, in an electric razor that floats and displaces the razor head following changes in the skin surface, a space for the razor head to float and displace must be secured inside the main body case. It becomes a factor to form.

  In order to increase the accommodation space of the main body case, the main body case is formed to be thicker and longer to increase the volume of the main body case. However, the size of the main body case at present is already approaching the limit of ergonomics, and the main body case cannot be enlarged easily. In this case, there is no other way but to reduce the size of the circuit board, to reduce the space for floating the razor head, and to effectively use the dead space inside the main body case.

  In the electric shaver of the present invention, the circuit board and the secondary battery are assembled to the inner frame, and the inner frame is hermetically accommodated in the inner case to waterproof the circuit board and the like. It is well known. There, a board mounting structure for fixing and holding a circuit board and a battery holder are integrally formed in the lower half of the inner frame. The secondary battery is erected and held in a state adjacent to the left and right, and the circuit board having a larger vertical dimension than the secondary battery is erected on the front portion of the battery holder.

Japanese Patent Laying-Open No. 2005-103145 (paragraph number 0033, FIG. 4)

  According to the electric razor of Patent Document 1, since the electrical components such as the motor, the circuit board, and the secondary battery are collectively waterproofed, the waterproof structure can be simplified. However, since the motor is accompanied by the razor head and moved to the front, back, left, and right, it is necessary to secure a large space for moving the motor inside the main body case. there were.

  The object of the present invention is to improve the arrangement structure of the circuit board, the secondary battery, and the motor, to prevent the main body case from being enlarged while using the internal space without waste, and to handle it easily while being multifunctional. The object is to provide an electric razor with an easy-to-use body case. An object of the present invention is to provide an electric razor having a robust structure that can withstand even when a large drop impact is applied by firmly supporting a razor head with a main body case.

  In the electric razor of the present invention, a circuit board 26, a battery 27, and an inner blade driving motor 18 are accommodated in a main body case 1 that supports the razor head 2. A lid 5 is provided inside the main body case 1 to divide the main body case 1 into an upper upper compartment R1 and a lower lower compartment R2. The lid body 5 is formed in a lateral shape by a base wall 28 and a front wall 29 that protrudes upward continuously from the front portion of the base wall 28. The motor 18 is accommodated in the upper compartment R1, the battery 27 is placed upright below the base wall 28 in the lower compartment R2, and the circuit board 26 is placed upright in front of the front wall 29 in the lower compartment R2. It is characterized by being. In addition, the horizontal shape in this invention includes the case where the front wall 29 stands | starts up vertically and the cover body 5 is formed in L shape.

  A substrate mounting structure for fixing and supporting the circuit board 26 and a battery holder 31 for fixing and supporting the battery 27 are integrally formed below the lid 5. The upper part of the circuit board 26 is fixedly supported by a board mounting structure provided at the front part of the front wall 29.

  A sealing material 38 is provided between the inner surface of the main body case 1 and the joint surface of the lid 5 to seal the lower compartment R2. The motor 18 enclosed in the motor holder 17 and the circuit board 26 are connected via the power supply lead 80. The power supply lead 80 is wired through a lead passage 82 provided in the front wall 29 and a lead passage 81 provided in the motor holder 17, and is sealed with a packing 83 attached to each lead passage 81, 82.

  A protective projection 84 is formed continuously from the opening on the upper compartment R1 side of the lead passage 82 provided in the front wall 29, and the power supply lead 80 is led out along the protective projection 84 to the upper compartment R1 side.

  Two batteries 27 erected and supported by the battery holder 31 are arranged adjacent to the back surface of the flat circuit board 26. The battery 27 is arranged in a state where a virtual plane H passing through the central axis of the two batteries 27 is inclined with respect to the board surface of the circuit board 26. Thereby, a space for accommodating the circuit component 40 mounted on the circuit board 26 is secured between the circuit board 26 and both the batteries 27.

  The razor head 2 including the inner blade 13 a, the outer blade 13 b, and the motor 18 is supported by the base wall 28 and the front wall 29 of the lid 5.

  A head support frame 45 that supports the razor head 2 is disposed in the upper compartment R1. A front regulating wall 68 is provided on the front wall 29 of the lid 5, and a rear regulating wall 69 is provided on the base wall 28. A connection protrusion 52 that is engaged and connected to the front restriction wall 68 is formed on the front wall of the head support frame 45 facing the front wall 29 of the lid 5, and is connected and fixed to the rear restriction wall 69 below the head support frame 45. A connected body 53 is provided. The front regulating wall 68 is provided with a guide groove 70 for incorporating and guiding the connecting projection 52. Thus, the head support frame 45 is rotationally displaced about the connection protrusion 52 fitted in the guide groove 70, and the connection body 53 is connected and fixed to the rear regulating wall 69.

  The razor head 2 is supported by a head support frame 45 attached to the lid 5 so as to be floatable. A front regulating wall 68 is provided on the front wall 29 of the lid 5, and a rear regulating wall 69 is provided on the base wall 28. A connection protrusion 52 that is engaged and connected to the front restriction wall 68 is formed on the front wall of the head support frame 45 facing the front wall 29 of the lid 5, and is connected and fixed to the rear restriction wall 69 below the head support frame 45. A connected body 53 is provided. The front regulating wall 68 is provided with a guide groove 70 for incorporating and guiding the connecting projection 52. Thus, the head support frame 45 is rotationally displaced about the connection protrusion 52 fitted in the guide groove 70, and the connection body 53 is connected and fixed to the rear regulating wall 69.

  A connection hole 72 for fitting and supporting the connection protrusion 52 is formed in the inner depth of the guide groove 70.

  In the electric shaver according to the present invention, the transversely-shaped lid 5 formed by the base wall 28 and the front wall 29 is assembled to the main body case 1, and the interior of the main body case 1 is divided into the upper compartment R1 and the lower compartment R2. And was divided into In addition, the motor 18 is accommodated in the upper compartment R1, the battery 27 is erected below the base wall 28 in the lower ward room R2, and the circuit board 26 is erected in front of the front wall 29 in the lower ward room R2. I was able to do it.

  According to the electric shaver having the above configuration, a space for accommodating the circuit board 26 having a large vertical dimension and a space for accommodating the battery 27 that requires a small vertical dimension are ensured in a lean state before and after the lower compartment R2. The upper compartment R1 can be used as a storage space for the motor 18. In other words, the front upper portion of the lower ward chamber R2 and the lower portion of the upper ward chamber R1 are adjacent to each other with the front wall 29 therebetween, thereby effectively utilizing the internal space of the main body case 1 without waste. 18, the circuit board 26, and the battery 27 can be collectively arranged. Thereby, it can prevent that the main body case 1 enlarges, and can provide the electric shaver provided with the main body case 1 which is easy to hold and easy to handle while being multifunctional.

  A board mounting structure for fixing and supporting the circuit board 26 and a battery holder 31 for fixing and supporting the battery 27 are integrally formed at the lower part of the lid 5, and the upper part of the circuit board 26 is provided at the front part of the front wall 29. When fixedly supported by the board mounting structure, the upper part of the circuit board 26 having a large outer dimension can be firmly supported by the solid front wall 29. As a result, it is possible to reliably prevent the circuit board 26 from floating or rattling, so that, for example, the occurrence of a serious failure such as disconnection of the lead wire led out from the circuit board 26 or falling into contact failure is prevented. Reliability can be improved.

  The space between the main body case 1 and the lid 5 is sealed with a sealing material 38, and the power supply lead 80 is further connected via a lead passage 82 provided on the front wall 29 and a lead passage 81 provided on the motor holder 17. When wiring is performed and sealing is performed with the packing 83 attached to each of the lead openings 81 and 82, the wiring distance between the motor 18 and the circuit board 26 is shortened, the wiring form is simplified, and the assembly work can be reduced. In addition, since the middle portion of the power supply lead 80 is held by the front wall 29 via the packing 83, even when the razor head 2 is floatingly supported, external force repeatedly acts on the connection portion of the power supply lead 80. Can be avoided to prevent disconnection.

  A wiring structure in which a protective protrusion 84 is formed continuously in the opening on the upper compartment R1 side of the lead passage 82 provided in the front wall 29, and the power supply lead 80 is led out to the upper compartment R1 side along the protective protrusion 84. Accordingly, the protective protrusion 84 can prevent the power supply lead 80 from coming into contact with and being damaged by the razor head 2 side component incorporated in the upper compartment R1. In particular, when the razor head 2 is floatingly supported, the power supply lead 80 may be repeatedly pinched and damaged by the member that is floatingly displaced. Even in such a case, the member that is floatingly displaced is received by the protective protrusion 84. Thus, the power supply lead 80 can be reliably prevented from being damaged.

  With respect to the arrangement structure of the two batteries 27 housed in the lower compartment R2, the virtual plane H passing through the central axis of the two batteries 27 is arranged obliquely with respect to the board surface of the circuit board 26, and the circuit When a space for accommodating the circuit component 40 mounted on the circuit board 26 is secured between the board 26 and the batteries 27, for example, the previous virtual plane H is parallel or orthogonal to the board surface of the circuit board 26. Compared with the case where the main body case 1 is arranged in a state, the circuit board 26 and the battery 27 can be centrally arranged while using the space without waste, and the main body case 1 can be prevented from being enlarged.

  When the razor head 2 including the inner blade 13a, the outer blade 13b, and the motor 18 is attached using the base wall 28 and the front wall 29 that are in a crossing relationship, the razor head 2 is attached with the lid 5 having excellent structural strength. Compared to mounting and fixing the razor head on the same plane, the razor head 2 can be firmly and securely fixed to the main body case 1 and thus has a robust structure capable of withstanding a large drop impact. It can be.

  In the electric shaver in which the front restriction wall 68 and the rear restriction wall 69 are provided on the front wall 29 and the base wall 28 of the lid 5 and the connection protrusion 52 and the connection body 53 are provided on the head support frame 45 side, the front restriction wall The connecting projection 52 is fitted into the guide groove 70 of the 68 and positioned, and the head support frame 45 is rotated and displaced around the connecting projection 52 in this state, whereby the connecting body 53 is connected to the rear regulating wall 69. Therefore, the head support frame 45 can be simply connected to the lid 5 so that the razor head 2 can be assembled to the main body case 1 accurately and reliably. Further, the connecting protrusion 52 can be guided to the proper assembly position by the guide groove 70 and simultaneously positioned, so that the head support frame 45 can be reliably assembled to the lid 5 with less effort.

  In an electric razor in which the razor head 2 is supported in a floating manner by a head support frame 45 attached to the lid 5, the connection structure of the head support frame 45 to the lid 5 is the same as that described above. By simply connecting the support frame 45 to the lid 5, the razor head 2 can be accurately and reliably assembled to the main body case 1. By connecting the head support frame 45 that floats and supports the razor head 2 to the lid 5, the razor head 2 is connected to the main body case 1. Easy assembly work.

  If the connecting hole 72 is formed in the inner part of the guide groove 70, the head support is provided in a state where the connecting protrusion 52 is fitted in the connecting hole 72, that is, there is no room for the connecting protrusion 52 to move inside the guide groove 70. Since the frame 45 can be rotationally displaced and connected to the lid 5, a series of assembly operations can be performed more easily. After the connection protrusion 52 is fitted in the connection hole 72, it is possible to concentrate on the operation of connecting the connection body 53 to the rear restriction wall 69, so that the connection work between the connection body 53 and the rear restriction wall 69 can be performed quickly and accurately. The

(Embodiment) FIGS. 1 to 16 show an embodiment of an electric shaver according to the present invention. 2 to 4, the electric razor includes a main body case 1 that also serves as a grip, a razor head 2 that is supported by the main body case 1, and an electrical component unit that is accommodated in the main body case 1. Note that the concepts of front and rear, left and right, and top and bottom in the present invention follow the azimuth arrows shown in FIGS.

  The main body case 1 includes an inner case 3, an outer case 4 that covers the front and rear surfaces of the inner case 3, a lid 5 that is assembled inside the inner case 3, and the like. The outer case 4 is composed of a front case 4a and a rear case 4b which are divided into two in the front and rear directions. A light emitting display section 6 and a motor start switch button 7 are provided on the upper and lower sides of the front surface of the main body case 1, and a slashing blade unit 8 and a squeezing blade unit 8 are provided above the rear surface of the main body case 1. A slide knob 9 for raising and lowering is provided. The structure of the light emitting display unit 6 will be described later.

  The razor head 2 includes a hollow head frame 11 and an outer blade holder 12 attached to and detached from the head frame 11 as a main structure. Both of them include a drive mechanism, a pair of front and rear main blades 13 and a center. It is configured by incorporating a blade 14 or the like. The drive mechanism is composed of a transmission mechanism 15 that transmits motor power to the inner blade 13a, a vibrator (not shown), and the like. The main blade 13 includes an inner blade 13a made of a rotary blade and an outer blade 13b made of a mesh blade. In FIG. 3, the axis center P <b> 2 of the razor head 2 when viewed from the side is inclined forward with respect to the longitudinal center axis P <b> 1 of the main body case 1. A motor holder 17 is fixed to the lower surface of the head frame 11, and a motor 18 is accommodated therein.

  As shown in FIG. 5, the inner case 3 is formed in a bottomed cylindrical shape that opens upward, and the upper opening is formed in a V shape that expands upward when viewed from the side. This is to prevent the floating frame 41 (described later) from contacting and buffering the inner case 3 when the razor head 2 tilts left and right. On the outer surface of the notch opening, a laterally-shaped engagement rib 20 is formed, and a connecting groove 21 for fastening the outer case 4 is formed on both sides of the lower portion. The connecting groove 21 is positioned below the boss hole 23a that fits with the fastening boss 23 (see FIG. 5).

  By assembling the lid 5 inside the inner case 3, the upper compartment R <b> 1 and the lower compartment R <b> 2 are partitioned above and below the lid 5. A head support frame 45 is accommodated in the upper compartment R1, and a circuit board 26 and two secondary batteries 27 are accommodated in the lower compartment R2. The secondary battery 27 is composed of a cylindrical battery that is long in the vertical direction, and supplies power to all electrically operated members such as the motor 18 and the LED 87. The circuit board 26 is formed by mounting electronic components constituting the control circuit on the front and back surfaces of the board having a larger vertical dimension than the secondary battery 27. The upper compartment R1 means a space surrounded by the main body case 1 above the lid 5, and the lower compartment R2 means a space surrounded by the inner case 3 below the lid 5.

  In this way, in order to accommodate the circuit board 26 and the secondary battery 27 having different shapes and vertical lengths in the lower compartment R2 in a state where the space is not wasted, the lid 5 is provided with a horizontal base wall 28, a base A front wall 29 that is inclined obliquely upward continuously from the front portion of the wall 28 is formed in a laterally-shaped shape. The side-shaped lid 5 secures a space for standingly accommodating the two secondary batteries 27 below the base wall 28, and further extends from the front of the battery housing space to the front of the front wall 29. A vertically long space for standing up and storing 26 is secured. The inclination angle of the front wall 29 is matched with the inclination angle of the axis center P2 of the razor head 2.

  A battery holder 31 for fixing and supporting the secondary battery 27 is integrally formed on the lower surface side of the base wall 28. In addition, a board mounting structure for fixing and supporting the circuit board 26 is provided across the front side of the battery holder 31 and the front side of the front wall 29. As shown in FIG. 6, the battery holder 31 includes two holding walls 32 each having a partial arc opening toward the rear of the case, and the upper ends of both holding walls 32 are closed by the base wall 28. The lower end of the cover is closed with a terminal wall 33. As shown in FIG. 16, the board mounting structure is provided with a pair of left and right vertical ribs 34 that extend from the front surface of the battery holder 31 to the front surface side of the front wall 29, and is provided above and below the left and right side edges of the circuit board 26. A plurality of sets of latching claws 36 for engaging and holding 26a, cutouts 26b provided on the upper and left sides of the circuit board 26, and four projections 35 for receiving and supporting the cutout step portions 26c on both sides of the lower edge. . The protrusion 35 and the locking claw 36 are formed integrally with the lid 5 and the battery holder 31.

  As described above, the sealing material 38 is disposed between the inner surface of the inner case 3 and the peripheral surface of the lid 5 in order to waterproof the circuit board 26 and the secondary battery 27 accommodated in the lower compartment R2. . Specifically, an endless seal groove 39 is formed along the peripheral surfaces of the base wall 28 and the front wall 29, and a ring-shaped seal member 38 is mounted inside the seal groove 39.

  The two secondary batteries 27 erected and supported by the battery holder 31 are adjacent to the back surface of the flat circuit board 26 via the holding wall 32. In order to secure a space for accommodating circuit components mounted on the circuit board 26 between the secondary batteries 27 and the circuit board 26, the secondary batteries 27 are arranged in a stepped manner in a plan view. is there. As shown in FIG. 6, when assuming a virtual plane H passing through the central axis of the two secondary batteries 27, the virtual plane H is arranged in an obliquely inclined state with respect to the substrate plane of the circuit board 26, A space is secured between the circuit board 26 and the secondary battery 27 on the side far from the board 26. On the substrate surface facing this space, for example, a CPU constituting a control circuit and a bulky circuit component 40 such as a temperature sensor for detecting the temperature of the secondary battery 27 are arranged. A switch 76 is mounted on the board surface facing the switch button 7, and a switch opening 77 that allows the switch button 7 to be pushed in is formed on the case wall of the inner case 3 facing the switch 76. Sealed.

  In order to float and support the razor head 2 so as to freely move up and down and to the left and right, a floating frame 41 is fixed to the motor holder 17, and a floating structure is provided between the floating frame 41 and the front wall 29 of the lid 5. In FIG. 7, the floating frame 41 includes a front frame 41 a that covers the front surface of the motor holder 17 and a rear frame 41 b that covers the rear surface of the motor holder 17. As shown in FIG. 8, a swing shaft 42 and a pair of left and right tilt pins 43 project from the front wall of the front frame 41a. Only the swing shaft 42 is provided in the rear frame 41b.

  The floating structure includes a head support frame 45 that is engaged and connected to the lid body 5, a float spring 46 that is disposed between the head support frame 45 and the floating frame 41, and pushes up and biases the floating frame 41. A tilting return spring 47 for returning the floating frame 41 to the neutral position and a spring holder 48 in which the tilting return spring 47 is incorporated. The float spring 46 is a compression coil spring.

  The head support frame 45 is composed of a front frame 45a and a rear frame 45b, and longitudinal guide grooves 49 that allow the swing shaft 42 to move up and down are formed in both the frames 45a and 45b. Floating openings 51 that allow the tilting pin 43 to move up and down and to the left and right are formed at the lower left and right of the guide groove 49 of the front frame 45a, and a connecting shaft (connecting protrusion) 52 is formed at the lower ends of the left and right side walls ( (See FIG. 8). Similar connecting shafts (connectors) 53 are also formed on both sides of the lower portion of the rear frame 45b.

  The tilt return spring 47 is a spectacle frame-shaped torsion coil spring having a pair of left and right coil portions 54, and a spring arm 55 is integrally extended from each of the coil portions 54, and an arm protruding end is bent. The spring holder 48 has a bearing hole 57 into which the previous swing shaft 42 is fitted at the upper center, and a floating groove 58 that allows the tilting pin 43 to tilt left and right is formed on the lower left and right of the bearing hole 57. On the left and right sides of the rear surface, spring recesses 59 for accommodating the previous coil portions 54 are formed.

  The floating frame 41 is integrated with the motor holder 17 by engaging the front frame 41a and the rear frame 41b with the front and rear surfaces of the motor holder 17 and engaging and connecting the lower ends of both the front and rear frames 41a and 41b. Is done. Next, the float spring 46 is assembled between the front frame 41a and the rear frame 45b, and the rear frame 45b is assembled to the rear frame 41b with the swing shaft 42 fitted in the guide groove 49. Similarly, the swing shaft 42 is fitted into the guide groove 49 of the front frame 45a, and at the same time, the front frame 45a is assembled to the front frame 41a with the tilting pin 43 entering the floating opening 51, and the lower ends of the front and rear frames 45a and 45b. The head support frame 45 can be integrated with the floating frame 41 by fastening each other with screws 61 (see FIG. 9).

  The front swing shaft 42 is fitted into the bearing hole 57 of the spring holder 48 in which the tilt return spring 47 is incorporated, and the cap 63 is fixed to the projecting end of the swing shaft 42 with a screw 64 as shown in FIG. The spring holder 48 is integrated with the front frame 41a with the front frame 45a interposed therebetween. The tilt return spring 47 and the spring holder 48 in this state can move up and down along with the floating frame 41, but cannot tilt right and left. In order to restrict the horizontal tilting of the spring holder 48, vertical restriction grooves 65 are formed on the front left and right sides of the front frame 45a (see FIG. 8), and slide protrusions 66 that slide up and down along the restriction grooves 65 are formed on the spring holder 48. It is formed on both sides of the lower part. A cap 63 is also fixed to the projecting end of the rear swing shaft 42 with a screw 64.

  The floating structure configured as described above is assembled to the inner case 3 using the lid 5. For this purpose, as shown in FIG. 10, the front regulation wall 68 and the rear regulation that receive and support the left and right side surfaces of the head support frame 45 on the left and right sides of the upper rear surface of the front wall 29 and the left and right sides of the base wall 28 of the lid 5. A wall 69 is formed in a protruding manner, guide grooves 70 and 71 are formed in the opposing surfaces of the regulating walls 68 and 69, and connection holes 72 and 73 are formed at the front ends of both guide grooves 70 and 71.

  The front connection shaft 52 provided on the head support frame 45 is guided by the guide groove 70 and engaged with the front connection hole 72, and the head support frame 45 is rotated and displaced clockwise around the connection shaft 52. Thus, the entire razor head 2 is temporarily fixed to the lid 5 by allowing the rear connecting shaft 53 to be guided by the rear guide groove 71 and facing the connecting hole 73 in the inner part of the groove. In this state, the power supply lead 80 led out from the motor 18 is connected to the circuit board 26. Electric power for driving the motor 18 is supplied via the power supply lead 80.

  As shown in FIG. 11, the power supply lead 80 is led out from a lead passage 81 that opens to the left and right of the bottom wall of the motor holder 17, and further opens to the left and right of the base end portion of the front wall 29 of the lid 5. Is led out to the front side of the front wall 29 and is electrically connected by soldering on the upper back surface of the circuit board 26 facing the front wall 29. Each of the lead openings 81 and 82 is sealed with a rubber packing 83 formed in a bush shape, whereby the inside of the motor holder 17 is waterproofed and the lower compartment R2 is waterproofed. An inverted L-shaped protective projection 84 is provided continuously to the opening on the upper compartment R1 side of the lead passage 82 provided on the front wall 29. By wiring the power supply lead 80 along the protective protrusion 84, the lower end of the spring holder 48 that moves downward can be received by the protective protrusion 84, and the power supply lead 80 can be prevented from being crushed by the spring holder 48 and being disconnected. Further, by adopting the above wiring structure, the wiring length of the power supply lead 80 from the motor holder 17 to the circuit board can be shortened, and the wiring work of the power supply lead 80 can be facilitated to reduce the labor.

  As shown in FIG. 5, the razor head 2 is assembled to the lid 5, the secondary battery 27 is mounted on the battery holder 31, and the circuit board 26 is mounted on the board mounting structure. To the inner case 3. In this state, the screw body 24 and the battery holder 31 are integrated with the inner case 3 by screwing the screws 24 into the bosses 23 from the bottom surface side of the inner case 3 as shown in FIG. In this fastened state, the plug 22 and the boss 23 are sealed with the seal ring 25. At the same time, the outer case 4 is integrated with the inner case 3, which will be described later.

  In the state in which the lid 5 is integrated with the inner case 3, the rear connection hole 73 provided in the lid 5 is joined to the inner surface of the fastening seat 85 provided in the V-shaped opening of the inner case 3. Therefore, as shown in FIG. 12, by screwing the screw 86 into the connecting shaft 53 from the outer surface side of the fastening seat 85, the three cases of the inner case 3, the lid body 5, and the head support frame 45 can be integrated. In this assembled state, the front, rear, left and right four portions of the head support frame 45 are integrated with the lid 5 via the connecting shafts 52 and 53. Furthermore, since the rear surface of the rear frame 45 b of the head support frame 45 is securely received by the rear wall of the inner case 3, the razor head 2 can be firmly supported by the main body case 1. As described above, in the state where the lid body 5 to which the razor head 2 is assembled is temporarily assembled to the inner case 3, the state of the float spring 46 and the power supply lead 80 can be visually observed through the V-shaped opening of the inner case 3. Therefore, it is possible to prevent the occurrence of defective products by confirming the presence or absence of assembly defects when fastening the screws 86.

  The razor head 2 in the above-described state can be displaced in a floating direction in the vertical direction, and can be tilted and displaced in the horizontal direction at the same time. Accordingly, the razor head 2 can be floated and displaced following the unevenness and inclination of the skin surface, and the whiskers can be cut smoothly without any sticking. The razor head 2 tilted left and right is immediately returned to the neutral position by the tilt return spring 47 at the same time as the external force is released. At the same time, the float spring 46 is operated to return to the upper standby posture. In the razor head 2 in a standby state at the neutral position, only a part of the lower end of the motor 18 enters the upper compartment R1, but the “motor 18 is accommodated in the upper compartment R1” according to the present invention. "Widely includes not only the case where the entire motor 18 is accommodated in the upper compartment R1, but also the case where only a part of the motor 18 is accommodated in the upper compartment R1 as described above. And Furthermore, a state in which a part of the motor 18 enters the upper compartment R1 when the razor head 2 is displaced up and down, left and right, or back and forth is also included in the concept of “accommodating the motor 18 in the upper compartment R1”. I will do it.

  The front case 4a constituting the outer case 4 is formed of a vertically long cover-like body having a constricted portion in the middle of the upper and lower parts, and an inverted triangular display wall 89 constituting the light emitting display portion 6 from the constricted portion to the upper end. Is formed. The light-emitting display unit 6 includes four LEDs 87 mounted on the circuit board 26, a transparent light guide 88 welded to the inner case 3 corresponding to the LEDs 87, and a transparent display wall 89 on the top of the front case 4a. It consists of. The four LEDs 87 are lit when the motor 18 is operating, display the remaining capacity of the secondary battery 27, and simultaneously function as a pilot lamp. In addition, it is turned on during charging to indicate that charging is in progress. As shown in FIG. 15, engaging claws 91 project from both sides of the upper end of the front case 4a and the left and right sides of the constricted portion, and a pair of left and right connecting arms 92 project from the rear surface of the lower end. An insertion hole 93 is formed.

  The rear case 4b that constitutes the outer case 4 is integrally provided with a knob base 95 to which the slide knob 9 is assembled, and holding walls 96 that extend from both lower sides of the knob base 95. An engagement hole 97 that engages with the previous engagement claw 91 is formed at the upper end of the front edge of the holding wall 96, and further, the engagement claw 91 is engaged with the previous engagement claw 91 at the middle part of the front edge of the holding wall 96. A mating recess 98 is formed. Further, on the opposing surface of the holding wall 96, a laterally-fitting fitting rib 99 that fits the engaging rib 20 of the inner case 3 is formed, and the connecting arm 62 is attached to the lower end of the holding wall 96. A horizontal L-shaped receiving wall 100 supported from the lower surface side is overhanging.

  By attaching the rear case 4b to the inner case 3 from above the rear surface and fitting and attaching the fitting rib 99 to the engaging rib 20, and simultaneously inserting the receiving wall 100 into the connecting groove 21 as shown in FIG. The rear case 4 b is integrated with the inner case 3. In this state where the portal-shaped rear case 4b is assembled to the inner case 3, the rear peripheral surface of the inner case 3 is exposed from between both side walls of the rear case 4b, and constitutes the outer wall of the main body case 1. The whole body case 1 can be made compact. In this state, the rear case 4 b is restricted in movement in the front-rear and up-down directions by the engagement rib 20, and the holding wall 96 is restricted in movement left and right by the inner case 3. The connecting arm 92 of the front case 4a is inserted and attached between the receiving wall 100 and the connecting groove 21 and joined to the rear case 4b, and the four engaging claws 91 are engaged with the engaging hole 97 and the engaging recess 98. By combining, the front and rear cases 4a and 4b can be integrated. Finally, by screwing the screw 24 inserted into the screw insertion hole 93 of the connecting arm 92 into the boss 23, the outer case 4 is integrated with the inner case 3 so as not to be separated. At the same time, as described above, the lid 5 and the battery holder 31 are integrated with the inner case 3. By adopting such a series of assembly structures, the lower compartment R2 can be reliably waterproofed with the sealing material 38, the packing 83, the seal ring 25, and the like, and the front and rear cases 4a and 4b of the outer case 4 and the inner case 3 can be firmly secured. Can be fixed to the link.

  FIG. 17 shows another embodiment of the connecting structure of the razor head 2 to the lid 5. In this case, only the guide groove 70 is provided in the front regulating wall 68, and a connecting projection (connecting body) 102 is provided in the rear regulating wall 69. When the razor head 2 is attached to the lid 5, the front connecting shaft 52 provided on the head support frame 45 is engaged with the guide groove 70, and the connecting shaft 52 is positioned at the inner back end of the guide groove 70. Then, the head support frame 45 is rotated and displaced in the clockwise direction around the connecting shaft 52, and after the rear connecting shaft 53 gets over the connecting projection 102 of the rear regulating wall 69, The engagement is retained by the engagement recess 103. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

  In the above embodiment, the case where the razor head 2 is floatingly supported by the head support frame 45 is shown. However, it is not necessary, and the razor head 2 may be fixedly supported by the head support frame 45 as shown in FIG. it can. In this case, the lid 5 is composed of a horizontal base wall 28, a front wall 29 rising vertically from the base wall 28, and an upper wall 105 protruding forward from the upper end of the front wall 29. An accommodation space at the top of 26 was secured. Further, a front regulating wall 68 is provided on both sides of the rear surface of the front wall 29, and a guide groove 70 and a connecting hole 72 are provided in the upper part thereof. Further, the screw 86 inserted through the rear regulating wall 69 is screwed into the rear connecting body 53 to fix the head support frame 45 to the lid 5. The rotational power of the motor 18 in this embodiment is converted into reciprocating power by the eccentric cam 106 and the vibrator 107 and transmitted to the inner blade 13a.

  According to the mounting structure of the razor head 2 according to the embodiment of FIGS. 17 and 18, the circuit board 26 and the secondary battery 27 having different shapes and vertical lengths can be connected to the inner case 3 (or the main body in a state in which space is not wasted. In addition to being able to be assembled to the case 1), the head support frame 45 can be firmly fixed to the main body case 1 through the lid 5 at the front, rear, left and right, and the labor required for assembling the razor head 2 can be greatly reduced. As a result, the assembly cost can be reduced accordingly. Further, when the lid 5 integrated with the razor head 2 is attached to the inner case 3 (or main body case 1), the rear surface of the head support frame 45 is received by the rear wall of the inner case 3 (or main body case 1). Thus, the relative movement of the lid 5 and the head support frame 45 can be reliably controlled. For example, even when receiving a large drop impact, the connection state of the connection shafts 52 and 53 is released. Can be maintained, and the assembled state of the razor head 2 can be maintained, and a more robust electric razor can be obtained.

  In addition to the above embodiment, the sealing material 38 can be attached to the inner case 3. The battery 27 need not be a secondary battery. In the embodiment, the virtual plane H is inclined in the direction of rising to the right as viewed in FIG. 6, but this is not necessary, and conversely, it may be inclined in the direction of increasing to the left. The connecting protrusion 52 can be formed by a protrusion other than a round shaft, and its cross-sectional shape can be formed in an arbitrary shape such as a polygonal shape, an elliptical shape, or a cross shape. The connection body 53 can be formed by holes or protrusions other than the shaft. The floating structure of the razor head 2 may be one that can float at least up and down.

  The inner case 3 can be formed into a bottomed cylindrical shape with a cylindrical case that opens up and down and a bottom case that closes the lower opening of the cylindrical case. In the embodiment, the main body case 1 is composed of the inner case 3 and the outer case 4 covering the front and rear surfaces of the inner case 3, but this is not necessary, and the inner case 3 is omitted as shown in FIG. The main body case 1 can be configured with only three.

It is a vertical side view which shows the attachment structure of a razor head. It is a front view of an electric razor. It is a side view of an electric razor. It is a vertical front view of an electric razor. It is a partially broken side view of the state which isolate | separated the inner case and the electrical component unit. It is a cross-sectional top view which shows the storage structure of a battery. It is a vertical side view which shows the attachment structure of a razor head. It is a front view of the state which isolate | separated the structural component of the floating structure. It is a vertical front view of a floating structure. It is a partially broken side view of the state which decomposed | disassembled the attachment structure of the razor head. It is a vertical side view which shows the wiring structure of a feed lead. It is a cross-sectional top view which shows the attachment structure of a razor head. It is a vertical front view which shows the fixing structure of an inner case and an outer case. It is a vertical side view which shows the fixing structure of an inner case and an outer case. It is a side view of the electric shaver of the state which divided the outer case. It is a disassembled perspective view which shows the attachment structure of a circuit board. It is a vertical side view which shows another Example of the connection structure of a razor head. It is a vertical side view which shows another Example of the connection structure of a razor head.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 2 Razor head 3 Inner case 5 Lid 13a Inner blade 13b Outer blade 17 Motor holder 18 Inner blade drive motor 26 Circuit board 27 Battery 28 Lid base wall 29 Lid front wall 31 Battery holder 38 Seal Material 45 Head support frame 52 Connection protrusion 53 Connection body 68 Front restriction wall 69 Rear restriction wall 70 Guide groove 72 Connection hole 80 Feeding lead 81/82 Lead passage 83 Packing 84 Protection protrusion H Virtual plane R1 Upper section room R2 Lower section room

Claims (8)

A circuit board (26), a battery (27), and an inner blade driving motor (18) are housed in the body case (1) that supports the razor head (2).
Inside the main body case (1), there is provided a lid (5) for dividing the inside of the main body case (1) into an upper upper compartment (R1) and a lower lower compartment (R2),
The lid (5) is formed in a lateral shape with a base wall (28) and a front wall (29) projecting upward continuously from the front portion of the base wall (28).
The motor (18) is housed in the upper compartment (R1), the battery (27) is erected below the base wall (28) in the lower compartment (R2), and the motor (18) A circuit board (26) is erected in front of the front wall (29) ;
A substrate mounting structure for fixing and supporting the circuit board (26) and a battery holder (31) for fixing and supporting the battery (27) are integrally formed below the lid (5).
An electric shaver characterized in that the upper part of the circuit board (26) is fixedly supported by a board mounting structure provided at the front part of the front wall (29) . A sealing material (38) is provided between the inner surface of the main body case (1) and the joint surface of the lid (5) to seal the lower compartment (R2),
The motor (18) enclosed in the motor holder (17) and the circuit board (26) are connected via the power supply lead (80).
The power feed lead (80) is wired through a lead port (82) provided in the front wall (29) and a lead port (81) provided in the motor holder (17). The electric shaver according to claim 1, which is sealed with a packing (83) attached to 81, 82) . A protective projection (84) is formed continuously in the opening on the upper compartment (R1) side of the lead passage (82) provided on the front wall (29),
The electric shaver according to claim 2, wherein the power supply lead (80) is led out toward the upper compartment (R1) along the protective projection (84) . The two batteries (27) raised and supported by the battery holder (31) are arranged adjacent to the back surface of the flat circuit board (26),
The battery (27) is arranged such that a virtual plane (H) passing through the central axis of the two batteries (27) is inclined with respect to the board surface of the circuit board (26). The electric shaver according to claim 1, 2 or 3, wherein a space for accommodating circuit components mounted on the circuit board (26) is secured between the battery (26) and the batteries (27) . A razor head (2) including an inner blade (13a), an outer blade (13b), and a motor (18) is supported by a base wall (28) and a front wall (29) of the lid (5). The electric razor according to any one of 1 to 4 . A head support frame (45) for supporting the razor head (2) is disposed in the upper ward chamber (R1),
A front regulating wall (68) is provided on the front wall (29) of the lid (5), and a rear regulating wall (69) is provided on the base wall (28).
On the front wall of the head support frame (45) facing the front wall (29) of the lid (5), a connection projection (52) engaged with and connected to the front restriction wall (68) is formed, and the head support frame ( 45), a connecting body (53) to be connected and fixed to the rear regulating wall (69) is provided at the lower portion of 45),
The front regulating wall (68) is provided with a guide groove (70) for incorporating and guiding the connecting projection (52).
The head support frame (45) is rotationally displaced about the connecting protrusion (52) fitted in the guide groove (70), and the connecting body (53) is connected and fixed to the rear regulating wall (69). Item 6. The electric razor according to any one of Items 1 to 5 . The razor head (2) is supported in a floating manner by a head support frame (45) attached to the lid (5),
A front regulating wall (68) is provided on the front wall (29) of the lid (5), and a rear regulating wall (69) is provided on the base wall (28).
On the front wall of the head support frame (45) facing the front wall (29) of the lid (5), a connection projection (52) engaged with and connected to the front restriction wall (68) is formed, and the head support frame ( 45), a connecting body (53) to be connected and fixed to the rear regulating wall (69) is provided at the lower portion of 45),
The front regulating wall (68) is provided with a guide groove (70) for incorporating and guiding the connecting projection (52).
The head support frame (45) is rotationally displaced about the connecting protrusion (52) fitted in the guide groove (70), and the connecting body (53) is connected and fixed to the rear regulating wall (69). Item 7. The electric razor according to any one of Items 1 to 6 . The electric shaver according to claim 6 or 7 , wherein a connecting hole (72) for fitting and supporting the connecting protrusion (52) is formed in the inner part of the guide groove (70) .

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