JPH0538502Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a push-button switch device that is often used in small electric appliances such as electric shavers.

(b) Prior Art For example, the "small electrical equipment" disclosed in Japanese Unexamined Patent Publication No. 60-25 will be cited, and the conventional technology will be briefly explained along with this. In this publication, a printed circuit board housed in a main body case, a switch contact piece formed by engaging and fixing the printed circuit board at approximately the center of a double arch-shaped contact section, and a switch contact piece that is attached to the main body case and holds the contact section. A switch device is disclosed, comprising means for selectively deforming the contact portion, one of the contact portions being a switch ON contact portion and the other being a switch OFF contact portion. By the way, the operation panel is different from the ON operation panel in that it is a single board with the ON operation section and OFF operation section integrated with the center line as the border.
Although it has the advantage of complicating the assembly work and making the equipment larger than a system in which OFF switches are arranged side by side or a sliding system, the operation panel, which is swingable in a seesaw style, does not deform. Since a certain degree of strength is required, the thickness of the operation plate becomes large, which causes a problem in securing a rectangular recess for storing the operation plate. In addition, in terms of operability, it is not necessarily the best switching device as it tends to cause erroneous ON/OFF switching. Furthermore, it is difficult to employ this seesaw type switch when there are mechanical limitations on the dimensions of the operation panel itself or when it is attached to a cylindrical main body case.

(c) Problems to be solved by the invention The problem to be solved by the invention is to develop a switch device with excellent operability without increasing the installation space. The goal is to provide something that can be installed.

(d) Means for solving the problem A switch window is formed on the circumferential side of the cylindrical main body case, and a switch operation knob is disposed in the switch window so as to be freely visible. This operating knob is made of a soft material such as rubber, and has conductive polymer contacts attached to the inner surface of the knob. In addition, the switch-on/off press portion exposed outside the main body case of the operation knob is integrally formed on the left and right sides of the central protrusion that is formed with a high build-up in the center of the knob.

(e) Action When one of the pressing parts formed on the left and right sides of the central protrusion of the operating knob is pressed against its elastic return force, one of the contacts formed on the back of the knob touches the printed circuit board inside the main body case. The upper switch contact is closed and the motor, which is also housed inside the main body case, is driven. When the other pressing portion is pressed against its elastic return force, the other contact closes the other switch contact on the printed circuit board and stops driving the motor.

(F) Embodiment Hereinafter, an embodiment of the switch device of the present invention for an electric shaver will be described in detail with reference to the drawings.

1 is a cylindrical main body case made of ABS resin,
A motor insertion opening 2 and a battery attachment/removal opening (not shown) are provided at both upper and lower ends, and the interior is divided into a motor storage section 4 and a battery storage section 5 via a partition plate 3. The main body case 1 has a flange 6 projecting from its upper part, and an annular protrusion 7 that protrudes one step upward is provided on the upper surface of the flange 6.
An annular groove 8 is dug in the annular protrusion 7, and a ring packing 9 coated with silicone grease is inserted into this groove 8. Also, on one side of the main body case 1 is a switch window 1 shaped in the shape of a butterfly.
0 is formed. Further, the main body case 1 has a threaded groove 11 and an annular groove (not shown) formed in its lower part, and a ring packing 12 coated with silicone grease is fitted into the annular groove, and a ring packing 12 coated with silicone grease is fitted into the annular groove. A bottom cover member 14 having an internal thread 13 formed therein corresponding to 11 is removably screwed into the lower part of the main body case 1.

Reference numeral 15 denotes a rotating ring fitted around the annular protrusion 7 on the upper part of the main body case 1. This rotary ring 15 has a thin elastic protrusion 1 on its inner peripheral surface.
6, and the annular protrusion 7 is configured such that the protrusion 16 can be engaged with and detached from a chevron-shaped protrusion 17 formed at a proper position on the outer wall of the annular protrusion 7 in correspondence with the protrusion 16. be fitted into. Furthermore, the rotating ring 15
recesses 18, 18 are formed at symmetrical positions with the elastic projecting piece 16 in between, and these recesses 18,
Decorative members 19, 19 in the shape of a cat's hand, which also serve as the operating knob of the rotary ring 15, are attached to appropriate positions of the rotary ring 15 via the screws 18. Reference numeral 20 denotes an arc-shaped wall material for opening and closing a drainage hole, which will be described later, and is also provided upright on the upper surface of the rotary ring 15.

Reference numeral 21 denotes a switch operation member made of rubber and attached to the switch window 10 of the main body case 1 so as to be freely retractable. This switch operating member 21
Butterfly-shaped pressing parts 23 and 24 are formed on the surface of the rubber plate 22 so as to protrude symmetrically with the body part 25 as a boundary, and the back surface of the rubber plate 22 corresponding to the body part 25 has a recess 26. is formed,
Further, back protrusions 27, 27 are formed on the back surface of the rubber plate 22 at symmetrical positions across the recess 26, and contact members 28, 28 made of conductive polymer are formed on the tops of the back protrusions 27, 27. is attached with adhesive or the like. Further, the switch operating member 21 has a small hole 29 disposed below the body portion 25, and this small hole 29 serves for positioning a mounting plate of the operating member 21, which will be described later.

Reference numeral 30 denotes a mounting plate for the switch operating member 21, which is made of a plate made of ABS resin with a central projecting wall 31, and a pair of round holes 32, 32 are bored at symmetrical positions with the projecting wall 31 in between. At the same time, the projecting wall 31
A small protrusion 33 is formed below. This mounting plate 30 is inserted into the pressing portion 2 from the inside of the main body case 1.
3 and 24 and the body part 25 are attached so as to be exposed to the outside through the switch window 10, while pressing the operating member 21 toward the inner surface of the main body case 1,
The flange portion of the operating member 21 is just held between the main body case 1 and the mounting plate 30 in a liquid-tight manner. At this time, the central projecting wall 31 of the mounting plate 30 fits into the recess 26 formed on the back side of the operating member 21, and the small protrusion 33 fits into the small hole 29 for positioning. Further, the contacts 28, 28 are located corresponding to the circular holes 32, 32 of the mounting plate 30 and are allowed to pass through the holes 32, 32.

34 is the motor insertion opening 2 of the main body case 1.
The motor holding plates 35 and 36 inserted into the circular table part 3
7 is a motor mounting member which is formed to hang down from the lower part, and has arcuate walls 38 and 39 erected from the upper surface of the outer periphery of the circular table part 37, and screw grooves 40 and 41 are cut on the outer surface thereof. The arcuate walls 38 and 39 and the circular table part 37 form a bristle pool part 42.

Reference numeral 43 denotes a DC motor whose sides are elastically clamped and held by the motor holding plates 35 and 36. A rubber packing 45 and a resin drive rod 46 are fitted to the drive shaft 44 of the DC motor. The rod 46 has a through hole 47 bored in the center of the circular table part 37.
The hair storage portion 42 is faced through the hair storage portion 42 . In this way, an inner blade body (not shown) is attached to the drive rod 46 facing the hair storage portion 42, and one of the arcuate walls 38,
39 is an outer cutter frame 4 to which a foil-like outer cutter is attached.
8 are removably screwed together, and the inner blade body rotates and slides on the inner surface of the outer blade by the rotation of the motor 43. Furthermore, a drainage hole 49 for washing with water is formed in the one arcuate wall 39, and this drainage hole 4
9 is opened and closed by the rotation of the rotating ring 15. A printed circuit board mounting surface 50 is formed on one of the motor holding plates 35, and a printed circuit board 51 is positioned via this surface by bosses 52 of the mounting surface 50 and mounted around the holding plates 35, 36. An IC chip 53 is disposed at one end in a space 54 formed between the holding plates 35, 36 and the inner surface of the main case 1. Further, when the printed circuit board 51 is mounted, its contact portions (not shown) face the contacts 28, 28 of the switch operating member 21.

In the electric shaver having the above configuration, the pressing portions 23 and 24 have a protruding amount W ₁ of the on-side pressing portion 23 from the normal main body case 1 which is larger than a protruding amount W ₂ of the off-side pressing portion 24. There is. This is to prevent this because if the protrusion amount W ₂ of the off-side pressing part 24 is set large, the rotation of the motor 43 will stop during shaving due to the movement of the off-side pressing part 24, and there is a risk that hair will be caught. In order to do this, consideration has been made to prevent inadvertent operation of the off-side pressing portion 24.

Further, the rotating ring 15 is sandwiched between the main body case 1 and the motor mounting member 34 and is rotatably mounted. Conventionally, when attaching the rotary ring 15 to the main body case 1, another member for fixing the rotary ring 15 was inserted between the motor mounting member 34 and the rotary ring 15, but this increased the number of parts and required electrical connection. This has resulted in the immediate solution to the problem of the razor's external height being increased, which had disadvantages in terms of ease of use and retail price.

(g) Effects of the invention As explained above, the present invention has a switch window formed on the side surface of the main body case, and a switch operation knob that can freely appear and retract from the switch window. The knob is made of a soft material such as rubber, has a conductive polymer contact on the inner surface of the knob, and has a high build-up on the center of the switch-on/off pressing part of the knob, which is exposed outside the main body case. Since the left and right protrusions are integrally formed, it is possible to take advantage of the design features of the device (for example, if a character is imitated, part of the character can be used as a switch). Moreover, there is an advantage that the mounting portion of the switch can be made smaller compared to a switch that is mounted separately for on and off switches. Furthermore, since the on side and the off side of the pressing part are separated by the central protrusion, this also has the effect of preventing malfunctions such as pressing both at the same time.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of the switch device of the present invention, Fig. 2 is a front view of the main parts of an electric shaver employing the switch device of Fig. 1, and Fig. 3 is a longitudinal sectional view of Fig. 2.
FIG. 4 is an exploded perspective view of the main part of FIG. 2, and FIG. 5 is an exploded top view of the main part of the rotating ring. 1...Main case, 10...Switch window, 21
...Switch operation knob (switch operation member), 2
8, 28... Contact, 23... Pressing part for turning on, 24
... Pressing part for off, 25 ... Central protrusion.

Claims (1)

[Scope of utility model claims] A switch window is formed on the side surface of the main body case, and a switch operation knob is arranged in the switch window so that it can freely appear and retract.The switch operation knob is made of a soft material such as rubber, and the inner surface of the knob is conductive. In addition to attaching a contact point made of a polymer, the switch-on/off pressing part of the knob exposed outside the main body case is integrally formed on the left and right sides of a central protrusion that is formed with a high build-up in the center. Switch device.