JPS6159751B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electric shaver, and more particularly to a mounting structure for a switch handle that turns on and off the main blade of an electric shaver.

[Background technology]

Conventional switch handles for electric shavers have been provided with hooks protruding from the left and right back surfaces of the switch handle that are fitted into openings formed on the left and right sides of the front of the housing to allow the switch handle to freely slide up and down. In addition, in recent years, as electric shavers have become smaller, electric shavers have been provided with switch handles that are larger than the size of the housing and are attached to almost the entire front left and right sides of the housing to improve ease of use. There is. However, when a switch handle with the above structure is attached to a small electric shaver, fixation of the switch handle and vertical guidance can only be relied on by the engagement between the hook part and the opening. There is a problem in that the large switch handle tends to wobble easily, making it difficult to use.Also, as electric shavers become smaller, the housing becomes thinner, so providing a hole for engagement with the switch handle is a problem that increases the strength of the housing. It has been difficult to successfully attach a large switch handle to a housing that is molded into a small size. In addition, if the switch handle is equipped with a locking means required to prevent the switch handle from being operated accidentally when not needed, space will be required on the front of the housing to house the locking means in addition to the switch handle. The increased thickness has been an obstacle to miniaturization of electric shavers.

[Purpose of the invention]

The present invention has been made in view of the above points, and its main purpose is to enable the switch handle to be stably attached to the front of the housing without reducing the strength of the housing, and to reduce the size of the electric shaver. The purpose of the present invention is to provide a mounting structure for a switch handle that is suitable for the use of electric razors, and another purpose is to provide a lock that protects the main blade of the electric shaver by retaining the cap attached to the housing and preventing erroneous operation of the switch handle. This can be done by using the connection point between the switch handle and the housing, and there is no need to provide an extra space on the front of the housing to house the locking means that prevents incorrect operation of the switch handle, making the electric shaver more compact. Another object of the present invention is to provide a spring support for supporting a pressure spring used in a main blade attachment/detachment mechanism within a housing, and to reduce the number of parts by integrally forming a spring support with a switch frame that holds a switch handle. , a structure that is easy to assemble, and
To provide a useful structure in which a trimmer block driven by the same drive source as the main blade is stably housed in the upper part of the switch frame above the switch handle.

[Disclosure of the invention]

In the electric shaver according to the present invention, the switch frame that holds the switch handle that moves up and down on the front face of the housing is fixed to the front face of the housing, and the locking claws that protrude on the left and right sides of the switch handle are attached to the left and right sides of the switch frame, respectively. The switch handle is held within the switch frame by fitting into the locking recesses provided in each vertical frame, and the switch handle locks the left and right locking claws to the upper ends of the corresponding locking recesses. It is movable up and down between the position and the lower position where each locking pawl is locked at the lower end of the locking recess, and when the switch handle is in the upper position, the power circuit is closed and the main blade at the upper end of the housing is driven. A structure is disclosed in which the power supply circuit is opened and the drive of the main blade is stopped when the switch handle is in the lower position. In addition, the cap attached to the housing to protect the main blade,
A protrusion is formed that fits into the locking recesses formed on the left and right sides of the switch frame, and by fitting the protrusion, the cap is held in place in the housing, and the protrusion is inserted into the locking recess to lock the switch handle. A structure for blocking upward movement of a pawl to prevent accidental actuation of an electric shaver and other useful structures are disclosed.

The present invention will be described in detail below based on embodiments shown in the figures. As shown in FIGS. 1 and 2, the electric shaver according to the present invention has a semicylindrical shape on the top surface of a thin housing 1 whose front and rear depths are much shorter than its height and width. It has a main blade 2 and a housing 1.
This is a reciprocating electric shaver with a switch handle 20 and a trimmer block 5 arranged vertically on the front surface of the shaver.The main blade 2 is protected by a cap 40 which is detachably attached to the upper end of the housing 1. As shown in FIG. 3, the housing 1 is formed by connecting a pair of half bodies 1a and 1b with screws 50, and includes a motor 8, which is a drive source for driving the main blade 2 and the trimmer block 5, inside. A storage battery 6, a charging block 10 for charging the storage battery 6, a plug block 11 equipped with a plug blade 12 for charging, and a main blade 2 and a trimmer block 5 that control the rotational movement of the motor 8.
A driver element 39 is housed therein, which converts the reciprocating motion into a reciprocating motion. The storage battery 6, motor 8, charging block 10, and plug block 11 are electrically connected on a chassis 16 built into the housing 1, and a switch terminal 17 formed at one place on the chassis 16 and the housing 1
A contact plate 21 provided on a switch handle 20 that slides up and down on the outer surface constitutes a power switch that opens and closes a power circuit including a motor 8 and a storage battery 6. The motor 8 has an elongated cylindrical shape with an eccentric cam 9a protruding from its upper surface, and is housed in the housing 1 with its lower end resting on a projection protruding from the lower end of the chassis 16. The storage battery 6 is cylindrical and has a length that occupies approximately half of the left and right width of the housing 1, and is supported on a battery receiving piece (not shown) formed on one side of the upper end of the chassis 16. The charging block 1 is housed horizontally in a position directly below the driver 30, and the charging block 1 is placed in the space left below the storage battery 6 and to the side of the motor 8.
0 and plug block 11 are stored. on the other hand,
The main cutter 2 is composed of an outer cutter block 3 that is detachably attached to the upper end of the housing 1, and an inner cutter block 4 that reciprocates on the inner surface of the outer cutter block 3 by the motor 8. Outer blade 3b to be formed
An inner cutter protruding from the upper surface of the inner cutter block 4 is connected to the inner surface for shaving. The outer cutter block 3 includes recessed stepped portions 21 formed on both left and right sides of a blade holder 22 that protrudes from the upper end of the housing 1, and protrusions 3c that protrude from both inner large ends of the outer cutter frame 3a that holds the outer cutter 3b.
The upper edge of one recessed step 21 is formed with a lock pin 23 that can be pulled into the housing 1. This lock pin 23 is molded integrally with a lock button 24 exposed at the upper end of one side of the housing 1, and a pressure spring 2 disposed inside the housing 1 is integrally formed with the lock button 24.
5, and by pushing in the lock button 24 against this spring force and retracting the lock pin 23, the protrusion 3c of the outer cutter block 3 and the recessed step of the blade holder 22 are removed. The engagement with the portion 21 is disengaged, and the outer cutter block 3 is removed from the housing 1. The switch handle 20 is a large flat plate that occupies most of the horizontal width of the front surface of the housing 1, and is a rectangular plate that is attached along the periphery of a recess 18 formed in a portion that covers almost the entire front surface of the housing 1. The switch handle 20 is housed in the lower part of the switch frame 30. As shown in FIGS. 7 to 9, this switch frame 30 has first hooks 31 formed on both left and right sides of the upper end portion, which are engaged with the periphery of the recess 18, and the bottom surface of the recess 18 is attached to the left and right inner edges of the lower end portion. The housing 1 is fixed to the front surface of the housing 1 by locking the second hook 32 that protrudes from the housing 1. Switch frame 30 Left and right vertical frames 33
In the upper and lower center portions of are elongated locking recesses 3 that penetrate in the left-right direction and become longer in the vertical direction.
5 is formed. On the other hand, switch handle 2
Locking claws 20a that fit into each of the above-mentioned locking recesses 35 protrude from the left and right side edges of 0, and each of the locking claws 2
0a is fitted into the corresponding locking recess 35, and the switch handle 20 is housed in the switch frame 30 in such a manner that both side edges of the switch handle 20 are in contact with the inner edge of the vertical frame 33, and each locking pawl 20a is fitted into the locking recess 35. 35 and the lower position where each locking pawl 20a contacts the lower end of the locking recess 35.
is guided by both the left and right vertical frames 33, and when the switch handle 20 moves upward, the contact plate 21 arranged on the back side of the switch handle 20 connects the pair of switch terminals 17 exposed at the bottom of the recess 18, thereby starting the motor 8. Drive. Further, a spring receiving piece 36 for supporting the pressing spring 25 within the housing 1 integrally extends from one side of the upper end of the switch frame 30. The trimmer block 5 is housed in the upper end of the switch frame 30 that remains above the switch handle 20, and is located in the recess 1 on the front surface of the housing 1.
8, by rotating around the pivot point between the closed position where the rear end is pivoted to the upper end portion and stored in the switch frame 30 and the open position where the front edge of the blade protrudes forward of the switch frame 30. It can be opened and closed freely,
It is opened and closed by a trimmer handle 5e that moves up and down on the outer surface of one side of the housing 1. When the trimmer block 5 is opened, the connecting claw 5a protruding from the rear end is coupled to the driver 39, so that the reciprocating motion of the driver 39 is transmitted to the movable blade 5b, and the movable blade 5b is moved above the fixed blade 5c. It is something that slides on
When shaving using the trimmer block 5, the rear upper edge of the trimmer block 5 comes into contact with the upper horizontal frame 34 of the switch frame 30, and the trimmer block 5 no longer
It prevents the frame 30 from rotating upward and
Both side edges of the trimmer block 5 come into contact with the left and right vertical frames 33, and as a result, the trimmer block 5 is prevented from shaking in the upward and left-right directions. On the other hand, the cap 40 has a semicylindrical main body 41 with an open lower surface that covers the entire surface of the outer cutter block 3, and leg pieces 42 that extend downward from both sides of the main body 41 and cover each side of the housing 1. ,
and a rear face piece 43 extending downward from the lower edge of the rear face of the main body part 41 and covering the rear face of the housing 1. The switch frame 30 is attached to the housing 1 in such a manner that the switch frame 30 is housed in the opening, that is, the inner edges of the front surfaces of both leg pieces 42 are brought into contact with the outer edges of both vertical frames 33 of the switch frame 30 over the entire length of the upper and lower sides. A stopper protrusion 44 protrudes from the center in the vertical direction on the inner edge of the front surface of each leg piece 42. When the cap 40 is attached to the housing 1, each stopper protrusion 44 protrudes from each vertical piece of the switch frame 30. 33, the leg pieces 42 receive force from each vertical frame 33 and open slightly due to the elasticity of the synthetic resin, and each stopper protrusion 4
4 reaches the locking recess 35 in each vertical frame 33, the stopper protrusion 44 fits into the locking recess 35, and each leg piece 42 closes by elastic restoring force, and the cap 40 closes in the housing. 1 is held by the engagement between the stopper projection 44 and the locking recess 35. Each stopper protrusion 44 is connected to the locking pawl 20 of the switch handle 20, as shown in FIG.
The locking pawl 20a of the switch handle 20 is inserted into each locking recess 35 at a position above a, that is,
This prevents the switch handle 20 from moving upward, and as a result, when the cap 40 is attached, the switch handle 20 will not accidentally move upward and drive the motor 8. Furthermore, if the cap 40 is attached to the housing 1 while the switch handle 20 remains in the upper position, the locking claws 20a are pushed down when each stopper protrusion 44 fits into the locking recess 35. Return the switch handle 20 to the lower position to cut off the power.

〔Effect of the invention〕

As described above, in the present invention, the switch frame that holds the switch handle that moves up and down on the front surface of the housing is fixed to the front surface of the housing, and the locking claws that protrude on the left and right sides of the switch handle are respectively attached to the vertical frames on both the left and right sides of the switch frame. The switch handle is held in the switch frame by fitting into the provided locking recess, and the upper position and each locking pawl are such that the switch handle locks each left and right locking pawl to the upper end of the corresponding locking recess. The switch handle can be moved up and down between the lower position where it is locked at the lower end of the locking recess, and the hook that protrudes from the back of the switch handle can be locked into the opening formed on the front of the housing, unlike conventional switch handles. Unlike those with a structure that stops,
There is no need to provide a protrusion on the back of the switch handle or make a hole in the front of the housing, and the switch handle itself can be flat and thin, making the electric shaver slim. It can be made into a durable container with no loss of strength due to holes, and since the switch handle can move up and down while being guided by the vertical frames on the left and right sides of the switch frame, there is no possibility of rattling or wobbling of the switch handle. disappears, and as a result,
There is an advantage that a switch handle mounting structure suitable for miniaturization of electric shavers, which requires the use of a relatively large switch handle in a small housing, can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an electric shaver according to an embodiment of the present invention with the switch handle in the lower position, and FIG. 2 is a perspective view showing the same electric shaver as above with the switch handle in the upper position. Figure 3 is an exploded perspective view of the same electric shaver as above, Figure 4 is a front sectional view of the same electric shaver as above, Figure 5 is a sectional view taken along line AA in Figure 4, and Figure 6 is in Figure 4. 7 is a sectional view taken along line C-C in FIG. 4, FIG. 8 is a sectional view taken along line D-D in FIG. 4, and FIG. 9 is a sectional view taken along line 4 in FIG.
10 is a front view of the electric shaver shown above, FIG. 11 is a front view of the electric shaver shown above with the cap attached, and FIG.
The figure is an enlarged partial cutaway view of section F in Figure 11.
is the housing, 2 is the main blade, 5 is the trimmer block, 20 is the switch handle, 20a is the locking claw,
25 is a pressure spring, 30 is a switch frame, 33 is a vertical frame, 35 is a locking recess, 36 is a spring receiving piece, 40 is a cap, and 44 is a stopper projection.

Claims (1)

[Scope of Claims] 1. A housing containing a drive source that electrically drives the main blade provided on the top surface, a switch handle that can move up and down on the front surface of the housing, and a switch that holds the switch handle on the front surface of the housing. The switch frame has vertical frames parallel to each other on the left and right sides, and is fixed to the front surface of the housing. It fits into the locking recess formed in the frame and is held within the switch frame.
The switch handle can freely move up and down between an upper position in which the left and right locking claws are locked in the upper ends of their corresponding locking recesses, and a lower position in which each locking claw is locked in the lower ends of the locking recesses. When the switch handle is in the upper position, the power supply circuit including the drive source is closed and the main blade is driven, and when the switch handle is in the lower position, the power supply circuit is opened and the drive of the main blade is stopped. electric razor. 2 The switch handle is housed in the lower part of the switch frame, and a trimmer block driven by the drive source is housed in the upper part of the switch frame that remains above the switch handle, and the trimmer block moves its cutting edge forward of the switch frame. The electric shaver according to claim 1, wherein the electric shaver is movable between a protruding position in which the cutting edge is protruded and a storage position in which the cutting edge is housed within a switch frame. 3. The main blade is removably attached to the housing with one end engaging a lock pin protruding from one side of the upper end of the housing, and the lock pin is biased outward by a pressure spring disposed within the housing. At the same time, the spring receiving piece of the pressing spring extends integrally with the rear surface of the switch frame, and is disengaged from the main blade when the lock pin is pushed into the housing against the spring force. An electric shaver according to claim 1 or 2. 4 A cap that encloses the part including the main blade is removably attached to the housing, and when the cap is installed, the stopper protrusions provided on the left and right sides of the cap fit into the locking recesses provided on the left and right sides of the switch frame, respectively, and the cap is closed. is held in the housing, and each of the left and right locking claws of the switch handle is prevented from moving upward by each stopper protrusion fitted into each recess.
The electric shaver according to item 1, 2, or 3.