JPS6231095Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for attaching and detaching an outer cutter frame of an electric shaver.

Conventionally, as shown in FIG. 5, this type of tool has been integrally constructed of a motor board 10 to which a motor 20 is attached and an opening/closing tool 15 to which an outer cutter frame is attached/detached. For this reason, the opening/closing tool 15 has a small number of parts, but since it has the function of holding the outer cutter frame in the main body case (none of which are shown), the parts have a complicated structure, and therefore, there is a problem with the size. It was difficult to manage and was a factor in increasing costs. Additionally, when the outer cutter frame is attached to and removed from the locking piece provided on the opening/closing tool, force is applied from the direction of the arrow in Fig. 5, and stress is applied to the opening/closing tool in a linear manner, and this stress is applied to the motor mounting section. The motor board is deformed (as shown by the chain line in Fig. 5), which adversely affects the drive unit, resulting in a decrease in sharpness due to uneven rotation of the blade. In FIG. 5, reference numeral 9 denotes a mounting portion of the vibrator to the motor board 10, and 8 denotes a swing spring of the vibrator.

The present invention eliminates the above-mentioned problems of the prior art and provides an electric shaver that reduces the number of parts and allows the outer cutter frame and motor to be reliably attached.

The gist of the present invention is as follows: an outer cutter frame, a main body case whose inner wall of the outer cutter frame is attached to and detached from the upper outer wall, and a case that protrudes from the outer wall of the main case and engages with the inner wall of the outer cutter frame to engage the outer cutter frame. The opening/closing tool includes an opening/closing tool having a locking piece that can be removed, and a motor board fixed within the main body case to which a motor is attached. A connecting portion is provided to connect each of the elastic pieces to a fixed piece that is formed on both sides of the piece and is fixed to the main body case, and the planar shape is approximately E-shaped. The electric shaver is characterized in that a hinge part is formed between the side wall part and the side wall part of the motor board, which integrally connects the two parts and is bendable.

An embodiment of the present invention will be described in more detail below with reference to the drawings. Figure 1 is a sectional view of the main parts of the present invention, and Figure 2 is a sectional view taken along line A-A in Figure 1.
FIG. 3 shows a plan view of the motor board, and FIG. 4 shows a side view thereof.

First, let's talk about the structure. 1 is the outer cutter and the outer cutter frame 2
Fixed. An opening/closing tool engaging recess 4 is provided in the inner wall 3 of the outer cutter frame 2. An inner cutter 5 that slides on the outer cutter 1 is attached to a vibrator 6. The vibrator 6 is provided with a motor joint fitting hole 7 in the center of the lower surface, a rocking spring 8 is integrally provided on both sides, and a fixing part 9 is formed at the end of the rocking spring 8. Vibrator fixing pin 11 protruding from the top surface of motor board 10
(See Figure 3) is inserted and fixed in position. As shown in FIG. 3, the motor board 10 has a motor positioning hole 12 and a motor set screw locking hole 13 arranged in the center, and hinge parts 14 at both ends to connect the opening/closing tool 1.
It is connected to 5. The hinge portion 14 may be provided only on one side. The opening/closing tool 15 has an elastic piece 1 protruding from the center.
The elastic piece 16 has a locking piece 17 at its tip. Locking piece 1
7 has a triangular protrusion having angles θ ₁ and θ ₂ . or,
Fixing pieces 18 are provided on both sides of the opening/closing tool 15, and a case guide rib 19 is formed to protrude approximately parallel to the locking piece 17 from a connecting portion 15a that connects the fixing pieces 18, 18 and the roots of the elastic piece 16. be done. 20 is a motor with a motor joint 21 on its rotating shaft.
is fixed. The main body case is composed of a main case front 23 and a main case back 22 as shown in Fig. 2.
A locking piece engagement hole 2 from which a locking piece 17 of the opening/closing tool 15 projects is provided in both side walls 24 that serve as installation guides for the outer cutter frame 2.
5 is provided. As shown in FIG. 3, the opening/closing tool 15 is provided with a cantilevered elastic piece 16 in the center, the above-mentioned locking piece 17 is formed at the tip, and a main body is provided on both sides of the elastic piece 16. Fixing pieces 18, 18 fixed to the case are formed protrudingly, and the elastic piece 16, the fixing piece 18,
18 are integrally connected to form a substantially E-shaped planar shape, and the hinge portion 14 is integrally formed with the side wall portion of the motor board 10 at the side wall portion of this connecting portion 15a.

Next, let's talk about embedding. Motor board 10
As shown in FIGS. 3 and 4, the motor board 10 is integrally molded with the opening/closing tool at the hinge part 14 (in this embodiment, a resin molded example is shown).
The motor 20 is fixed to the motor board 10, and the vibrator 6 is fixed to the motor board 10 as described above. At this time, the eccentric pin 26 of the motor joint 21 is engaged with the motor joint fitting hole 7. The movement in this state is assembled into the main body case 22. In this case, the opening/closing tool 15 that is integrated with the motor board 10 is bent 90 degrees inward from the hinge portion 14.
Insert the fixing piece 18 between the opening/closing tool solid bottom ribs 27 and 27' protruding from the back 22 of the main body case so that the opening/closing tool 15 is perpendicular to the motor board 10, and simultaneously insert the case guide rib 19 of the opening/closing tool 15 into the back 2
The opening/closing tool is inserted into the space between the opening/closing tool pushing rib 28 protruding from the opening/closing tool 2 and the inner wall 30 facing the rib. Also, at this time, by inserting the motor board 10 between the inner wall 30 and the motor board fixing rib 31 formed protrudingly on the back 22 of the main case, the opening/closing tool 15 and the motor board 10 are securely fixed to the back 22 of the main case. be done. The locking piece 17 of the opening/closing tool 15 projects outward from the locking piece engagement hole 25 on the back side 20 of the main case.

In this state, the main body case front 23 is covered so as to be positioned on each rib configured similarly to the main body case back 22. Therefore, the motor board 10 and the opening/closing tool 15 are reliably set in a state where they are independently positioned and fixed by each fixation while being connected by the hinge part 14.

Next, we will discuss the operation. Motor board 10
is positioned and fixed to the case by fixing the motor 20, the opening/closing tool 15 is fixed to the case by the fixed pieces 18 on both sides and the case guide rib 19, and the elastic piece 16 has elastic force and forms a cantilever spring. . When the outer cutter frame 2 is attached to the main body case, first push the inner wall 3 of the outer cutter frame 2 downward while being guided by the both side walls 24 of the main body case, so that the lowermost surface of the outer cutter frame 2 touches the opening/closing tool 15. By contacting the upper corner θ ₁ of the locking piece 17, the elastic piece 16 is deflected inward, and the locking piece 17 is engaged with the opening/closing tool engaging recess 4 of the outer cutter frame 2. At this time, since the elastic piece 16 of the opening/closing tool 15 has an outward elastic force, the lower end of the outer cutter frame 2 is pressed onto the case end surface 29 by the lower corner θ ₂ of the locking piece.

As described above, the effect of the present invention is that when the opening/closing tool and the motor board are integrally formed as shown in Fig. 5, the elastic deformation of the opening/closing tool is prevented when the outer cutter frame is set as shown in the figure. This led to deformation of the motor board, but in this invention, the fixing piece that fixes the opening/closing tool to the main body case is formed separately from the locking piece, and the opening/closing tool is attached to the motor board at the hinge, so it is easy to remove the door. When attaching and detaching the blade frame, the deformation of the opening/closing tool does not affect the motor board, and the characteristics of the motor board are not impaired at all. In addition, since the opening/closing tool is securely fixed to the main body case by the fixing pieces on both sides, the elastic piece formed protruding in the middle acts as a stable cantilever spring, and therefore the attachment and detachment of the outer cutter frame is stable. do.

Furthermore, since the motor board and the opening/closing tool are connected to each other at the hinge part, the assembly is easy as in the conventional example shown in FIG.

As described above, the present invention provides a more excellent electric shaver.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main part, and A-
A cross section is shown in Fig. 2. FIG. 3 shows a top view of the motor board, and FIG. 4 shows its side view. FIG. 5 is a side view of the main parts of the conventional example. 2... Outer cutter frame, 3... Inner wall of outer cutter frame, 4...
Opening/closing tool engagement recess (disposed on the outer cutter frame), 6... Vibrator, 8... Vibration spring, 9... Fixing part (disposed on the vibrator), 10... Motor board, 14... Hinge part (Disposed on the motor board), 15...Opening/closing tool, 15a
... Connecting part (disposed on the opening/closing tool), 16... Elastic piece (disposed on the opening/closing tool), 17... Locking piece (disposed on the elastic piece), 18... Fixed piece (disposed on the opening/closing tool) ), 19...
Case guide rib (disposed on the opening/closing tool), 20... Motor, 22... Back of the main case, 23... Front of the main case, 24... Both side walls of the main case, 25... Locking piece engagement hole (main body ), 26... Eccentric pin, 27, 27'... Opening/closing tool fixing rib (disposed on the main body case), 28... Opening/closing tool pressing rib (disposed on the main body case), 29... Case end face , θ ₁ ... upper corner of the locking piece, θ ₂ ... lower corner of the locking piece, 30 ... inner wall, 31 ... motor board fixing rib.

Claims (1)

[Scope of utility model registration request] An outer cutter frame, a main body case whose inner wall of the outer cutter frame is attached to and detached from the outer wall at the upper end, and a locking piece that protrudes from the outer wall of the main case and engages with the inner wall of the outer cutter frame to engage and release the outer cutter frame. The opening/closing tool has an elastic piece having the locking piece at its tip and a motor board fixed in the main body case to which the motor is attached, and the opening/closing tool has an elastic piece having the locking piece at the tip and both sides sandwiching the elastic piece. A connecting portion is provided which connects a fixing piece that is formed on the main body case and is fixed to the main body case, and each of the elastic pieces, so that the planar shape is approximately E-shaped, and the side wall of the connecting portion and the motor board An electric shaver characterized in that a hinge portion is formed between the side wall portion and the side wall portion to integrally connect the two and can be bent.