JPH05146Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric shaver that uses a dry battery as a power source.

[Conventional technology]

Figure 11 shows a conventional example, in which 1 is a dry battery 2.
It is a substantially cylindrical main body case in which the main body is detachably housed, and a conductive cap 3 is attached to the lower end thereof. The lower end of a conductive piece 4 is connected to the cap 3 by spot welding, and the upper end of this conductive piece 4 is used as a switch contact piece (not shown). A bottom cover 5 is detachably screwed onto the lower end of the main body case 1, and a contact body 6 made of a spring plate is attached inside the bottom cover. The contact body 6 has a pole contact piece 6a that elastically contacts the negative pole of the dry battery 2, and a diagonal contact piece 6b that elastically contacts the cap 3.

After storing the dry battery 2 in the main body case 1, by screwing and attaching the bottom cover 5 to the case 1, the pole contact piece 6a comes into elastic contact with the negative pole of the dry battery 2, and the diagonal shape Contact piece 6b
comes into elastic contact with the lower surface of the cap 3 to form a drive circuit for a drive device such as a motor (not shown) built into the main body case 1.

[Problem that the invention attempts to solve]

However, in such a conventional structure, since the cap 3 is attached to the main body case 1 while the contact body 6 is largely bent and deformed, the reaction force is large and the attachment is troublesome. In addition, cap 3
is supported by the main body case 1 from the back side and becomes undeformable, and when the bottom cover 5 is attached, not only the pole contact piece 6a but also the large oblique contact piece 6b is formed.
is deformed, so there is a problem that the operating force is large. As a result, the springiness of the diagonal contact piece 6b tends to wear out, and if it wears down with use, there is a risk of poor contact between the cap 3 and the diagonal contact piece 6b.

[Means for solving problems]

Therefore, the dry battery-powered electric shaver of the present invention has a bottom cover that is detachably attached to the lower end of the main case in which the dry battery is stored, and has a pole contact piece that elastically contacts the negative pole of the dry battery, and A contact body having an upwardly facing contact piece that can be elastically deformed is installed inside. The main body case houses a negative conductor that is in contact with the upward contact piece, and a cross section that forms a wedge-shaped locking groove in which both left and right edges of at least the lower end of the conductor are elastically locked. A pair of triangular ribs are integrally provided on the inner surface of the main body case so as to protrude along the axial direction thereof.
Furthermore, the width of the lower end of the conductor is made shorter than the inner circumference of the main body case between the pair of ribs,
The above-mentioned conventional problems are solved by forming a slight gap between the inner circumferential surface between the ribs in the main body case and the conductor.

[Effect]

The negative side conductor is elastically deformed by simply pushing it toward the inner peripheral surface of the main body case between a pair of ribs, and at least the left and right edges of the lower end easily cross over the ribs having a triangular cross section. , and is attached to the main body case by being engaged in the wedge-shaped engagement groove formed by these ribs. With this installation, based on the relationship between the width of at least the lower end of the conductor and the inner circumferential length of the main case between the pair of ribs, there is no conductor between the inner circumferential surface of the main case between the ribs and the conductor. A slight gap is formed that allows for elastic deformation. Then, when the bottom cover is attached to the main body case, the upward contact piece of the contact body built into the bottom cover is elastically deformed on the inner surface of the conductor attached to the main body case as described above. Since the conductor contacts elastically with elastic deformation, the upward contact piece and the conductor come into good contact with each other. At the same time, since the elastic deformation of the upward contact piece is reduced due to the elastic deformation of the conductor, the operating force necessary for attaching the bottom cover is reduced, and the wear of the contact piece during long-term use can also be reduced.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 10.

In FIGS. 1 to 8, reference numeral 11 denotes a main body case made of resin and having a substantially cylindrical shape, for example, and an outer cutter mounting body 12 is fitted onto the upper part of the case as shown in FIGS. 3 and 4. This mounting body 12 is fixed to the ceiling wall 11a of the main body case 11 via screws 13 screwed in from above. An outer cutter 14 is detachably attached to the upper part of the outer cutter attachment body 12, and a switch pressing member 1 covered with a flexible waterproof membrane 15 is provided around the outer cutter attachment body 12.
6 is installed.

Further, the lower end of the main body case 11 is opened, and a dry battery 26 (see FIG. 4) is housed in a manner that can be inserted and removed through this lower end opening.
A motor 17 is housed in the upper part of the motor 1 . The outer peripheral surface of this motor 17 forms a negative pole. As shown in FIGS. 3 and 4, the motor 17
is fitted into and supported by the fitting part 18a of the motor stand 18 made of resin, and is fixed together with the motor stand 18 by screwing the screw 13 into the fixed boss part 18b of the motor stand 18. . A contact piece 19 that contacts the positive pole of the dry cell battery 26 is attached to the motor stand 18 by heat caulking (see 18c in FIG. 4), and the tip end portion of this contact piece 19 protrudes from the bottom surface of the motor 17. It is in contact with the positive terminal 17a. In addition, 18d in FIGS. 3 and 4 is a dry battery positioning wall that is integrally provided on the lower surface of the motor stand 18.

The negative side conductor 20 made of a leaf spring is connected to the motor base 1
The contact piece 8 is fixed to the lower surface of the main body case 11 by heat caulking in a non-contact state with the contact piece 19 . As shown in FIGS. 9 and 10, this conductor 20 has an upwardly facing switch contact piece 23 integrally provided in a fixing part 22 having a hole 21 through which a heat staking projection (not shown) of the motor base 18 is inserted. At the same time, a downward conductor contact piece 24 is integrally provided on the fixing part 22.

As shown in FIG. 4, the upper end of the switch contact piece 23 is disposed on the back side of the switch pressing member 16 and is closely opposed to the outer peripheral surface of the motor 17. Therefore, when the switch pressing member 16 is pressed, the switch contact piece 23 is pushed while being elastically deformed and comes into contact with the outer peripheral surface of the motor 17, thereby closing the switch.

The conductor contact piece 24 has a window 24a through which a part of the inside 18d of the dry battery positioning wall escapes, and the width of the lower end 24b of the contact piece 24 is made larger than that of the upper part to form a substantially inverted T-shape. It is formed in the shape of Then, the lower end 2 of the conductor contact piece 24
4b is located near the lower end opening of the main body case 11, and its width is a length extending over an angle θ of approximately 90° or more with respect to the inner peripheral surface of the main body case 11, as shown in FIG. It's sato.

Furthermore, as shown in FIGS. 1, 2, and 5 to 8, the inner surface of the main body case 11 has
The conductor 20 has a wedge shape (the eighth
A pair of ribs 28 having a triangular cross section are integrally protruded along the vertical direction, forming a locking groove 27 (see figure). The width of the lower end portion 24b of the conductive contact piece 24 in the free state is set to be shorter than the inner circumferential length A of the inner circumferential surface 11b of the main case between the pair of ribs 28. As a result, both left and right edges of the lower end portion 24b are elastically locked in the locking groove 27, as shown in FIGS.
As shown in FIG. 6 and FIG.
4, a slight gap G is formed between the two.

Moreover, the inner circumferential length A of the inner circumferential surface 11b of the main case 11 between the pair of ribs 28 is gradually narrowed from the lower end of the main case 11 toward the upper side. By making the locking in the locking groove 27 on the edge stronger, the main case 1
The fixing strength of the conductor contact piece 24 to the conductor contact piece 24 is further improved. In addition, a pair of ribs 28
A notch 29 is formed at the lower end of the . This notch 29 is formed to be slightly longer than an overlapping dimension B (see FIG. 2) between a contact piece 33 and a conductor contact piece 24, which will be described later.

Further, as shown in FIGS. 1 to 3, a bottom cover 30 made of synthetic resin is detachably attached to the main body case 11 to close the bottom opening thereof. In addition,
In the case of this embodiment, the main body case 11 and the bottom cover 3
0 are provided with thread grooves 11c and 30a, respectively, and are removably attached by screwing them together. A contact body 31 made of a spring plate is attached inside the bottom cover 30. This contact body 3
1 has a pole contact piece 32 that elastically contacts the negative pole of the dry battery 26, and has an upward contact piece 33 that can be elastically deformed around the periphery. The upward contact pieces 33 are provided every 90°, and their upper ends are inclined inward. These inclinations prevent the upward contact piece 33 from getting caught on the lower end of the main body case 11 when the bottom cover 30 is attached to the main body case 11, and also prevent the bottom cover 30 from getting caught on the lower end of the main body case 11.
0 is designed to provide a guiding effect for installation.

In addition, 34 in FIGS. 1 to 3 indicates a protective rib provided on the bottom cover 30 inside the contact bodies 31 to protect the contact bodies 31, and 35 in FIGS. 1 and 2 indicates a protective rib. The rubber waterproof ring 36 in FIG. 3 indicates an inner blade rotated by the motor 17.

In assembling the electric shaver with the above configuration, the negative side conductor 20 is connected to the main body case 1 of the motor stand 18.
1, the lower end portion 24b of the conductor contact piece 24 is housed in such a manner that the left and right edges of the lower end portion 24b overlap the pair of ribs 28 in the main body case 11, respectively, as shown in FIG. Then, as shown by the arrow in FIG. 7, the conductor contact piece 24 is pushed toward the inner circumferential surface 11b of the main case between the pair of ribs 28. With such a simple operation, the conductor contact piece 24
is elastically deformed, and both left and right edges of its lower end portion 24b ride over the rib 28. This crossing can be done easily and smoothly because the rib 28 has a triangular cross section. As a result, both left and right edges of the lower end portion 24b are elastically locked in the wedge-shaped locking grooves 27 formed by the ribs 28. Since the conductor 20 is attached to the inner surface of the main body case 11 as described above, assembly can be easily performed.

At least the lower end portion 24 of the conductor 20
b and the length A of the inner circumferential surface 11b of the main case between the pair of ribs 28, there is a gap between the inner circumferential surface 11b between the ribs 28 and the conductor contact piece 24. Slight gap G that enables elastic deformation
is formed.

Therefore, when the bottom cover 30 is attached to the main body case 11, the inner surface of the lower end portion 24b of the conductive contact piece 24 attached to the main body case 11 as described above is exposed to the inner surface of the bottom cover 30 from the inside. The upward contact piece 33 of the contact body 31 that has been moved elastically deforms itself and elastically deforms the conductor contact piece 24 to come into contact with each other elastically. For this reason, the upward contact piece 3
3 and the conductor contact piece 24 can be brought into good contact with each other.

At the same time, since the elastic deformation of the conductor contact piece 24 reduces the elastic deformation of the upward contact piece 33, the operating force required to attach the bottom cover 30 can be reduced. Moreover, this also reduces the fatigue of the upward contact piece 33 during long-term use, allowing the upward contact piece 33 and the conductor contact piece 24 to maintain a comfortable contact over a long-term use.

Although the above-mentioned embodiment is constructed as described above, in carrying out the present invention, the main body case, the bottom cover, the contact body, the pole contact piece and the upward contact piece are It goes without saying that the specific structure, shape, position, etc. of the conductors, ribs, locking grooves, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways.

[Effect of idea]

According to the present invention, which has the configuration described in the above-mentioned utility model registration claim, the upward contact piece of the contact body installed in the bottom cover elastically deforms the conductor that comes in contact with it from the inside and presses it against the inner circumferential surface of the main body case. With this simple operation, the conductors can be securely fixed to the inner surface of the main body case, and since both the conductors and the upward contact piece are elastically deformed and come into contact with each other,
Since the possibility of poor contact can be prevented and the elastic deformation of the upward contact piece can be reduced, it has practical effects such as allowing the bottom cover to be attached to and detached from the main body case with a light force.

[Brief explanation of the drawing]

1 to 10 show an embodiment of the present invention, in which FIG. 1 is an exploded sectional view of the main parts, FIG. 2 is a sectional view of the main parts, FIG. 3 is an exploded perspective view of the whole, and FIG. Fig. 4 is a side view of the entire body with a part cut away, Fig. 5 is a sectional view of the main body case taken along line - in Fig. 1, Fig. 6 is a sectional view taken along line - in Fig. 1, and Fig. 7 is a sectional view taken along line - in Fig. 1. No. 6 above shows the situation in which the conductor contact piece is fixed to the main body case.
8 is a sectional view of the locking groove portion,
9 is a bottom view of the conductor, and FIG. 10 is a side view of the conductor viewed from the direction of arrow X in FIG. FIG. 11 is a sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 11... Main body case, 11b... Inner peripheral surface between ribs, 20... Conductor, 24... Conductor contact piece, 24a
... lower end of conductor contact piece, 26 ... dry battery, 27
...Latching groove, 28...Rib, 29...Notch, 30
... Bottom cover, 31 ... Contact body, 32 ... Pole contact piece,
33...Upward contact piece, between G...〓.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A bottom cover is removably attached to the lower end of the main case in which the dry battery is housed, and has a pole contact piece that elastically contacts the negative pole of the dry battery, and has a pole contact piece on the periphery. A contact body having an upward contact piece that can be elastically deformed is attached to the inside of the bottom cover, and the main body case houses a negative conductor that the upward contact piece contacts from the inside, and at least the lower end of this conductor. A pair of ribs having a triangular cross section are integrally provided along the axial direction of the inner surface of the main body case to form a wedge-shaped locking groove in which the left and right edges of the portion are elastically locked. The width of the lower end of the conductor is made shorter than the inner circumferential length of the main body case between the ribs to form a slight gap between the inner circumferential surface between the ribs of the main body case and the conductor. A battery-operated electric razor characterized by: (2) In the statement of claim (1) of the above utility model registration, the bottom cover is screwed onto and removed from the main body case, and the pair of ribs have a notch at the lower end thereof. and the notch is formed to be slightly longer than the overlapping dimension of the conductor and the upward contact piece.