JP2824119B2 - switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a switch, and more particularly to a switch having a combination of two push-on switches and a push-off switch for performing different operations.

[Prior art]

When there are two types of electric devices that perform two different operations, a switch is configured by a power switch for switching on / off state and a changeover switch for selecting two different operations, or a three-position switching type. Often configured with slide switches.

[Problems to be solved by the invention]

However, in the former case, the operation performed when the power switch is turned on is the operation selected by the changeover switch, and if the other operation is to be selected, the changeover switch must be further operated. Therefore, it is not possible to directly perform the operation of the person who needs it. In the latter case, by setting the off position to the midpoint,
The required operation can be obtained depending on which operation is performed from the off position, but on the other hand, when it is desired to move from one operation to the other operation, it is necessary to go through the off position once. There is a switch using a switch in which two on states are sequentially switched from an off state by operating a push button, but this also has the same problem as the above-described conventional example. The present invention has been made in view of such a point, and an object of the present invention is to provide a switch which can directly select two different operations and off.

[Means for Solving the Problems]

Thus, the present invention is a switch including two push-on switches for performing different operations and a push-off switch disposed between the two push-on switches, wherein the switch is turned on by operating the push-off switch. A first return means for returning the push-on switch set in the above, and a second return means for returning the other push-on switch from the ON state by operation of one of the two push-on switches. A push-off switch is provided between the switches.
The return means is disposed between the one push-on switch and the push-off switch so as to be movable in a seesaw manner, and the first switch lever which pushes up the other switch by pushing down one switch, and the other push-on switch and push-off. A second switch lever disposed so as to be movable freely with the switch and pushing up the other switch when one switch is pressed down, wherein the second return means is one push-on switch and the other push-on switch And a reversing lever which is arranged so as to be able to move seesaw freely and pushes up the other switch by pushing down one switch. [Operation] According to the present invention, if any of the push-on switches is operated from the off state, the operation obtained by the push-on switch is performed, and the operation from the state in which one push-on switch is selected to the other is performed. Even if the push-on switch is operated, the push-on switch which has been in the ON state returns, and the later-operated push-on switch becomes effective. Further, since a switch different from the pushed-in switch is pushed back by the lever that performs the seesaw movement, it is possible to reliably obtain a state where only one of the switches is pushed. [Example] Hereinafter, the present invention will be described in detail based on an example in which the present invention is used for an electrically driven tooth brushing. The illustrated electric toothbrush includes an elongated cylindrical main body 1 containing a storage battery 5, a motor 40, and the like, and a toothbrush connected to a drive shaft 4 protruding from the tip of the main body 1 as shown in FIG. The body 1 has a body 6 and covers 11 and 12 attached to its upper and lower ends, respectively.
A frame 13 on which a motor 40 and a cam block 41 are mounted,
A battery holder 50 on which the storage battery 5 is mounted is housed. The drive shaft 4 is also supported by the frame 13 and is connected to the motor 40 via the cam block 41. Reference numeral 15 in FIG. 1 denotes a waterproof rubber for waterproofing the tip of the main body 1. The cam block 41 changes the driving direction of the drive shaft 4 in accordance with the rotation direction of the motor 40. To briefly explain this point, the cam block 41
A face gear 43 meshing with a pinion 42 attached to the output shaft 40, an eccentric shaft 44 integral with the face gear 43, an eccentric cam 45 covered on the eccentric shaft 44, and a cam follower 46 engaged with the eccentric cam 45; The face gear 43 is supported at both ends by a shaft 47 held by the chassis 13, and the cam follower 46 is provided at one end of the drive shaft 4 supported by the chassis 13 via the bearing 14. I have. When the motor 4 rotates in one direction, the eccentric cam 45
The drive shaft 4 is reciprocated in the axial direction through the cam follower 46 while maintaining a state of being eccentric with respect to 47. In this case, it is possible to perform bath brushing for moving the toothpaste body 6 in the axial direction of the handle. When the motor 4 rotates in the reverse direction, the eccentric cam 45 rotates half a turn with respect to the eccentric shaft
And the inclined portion at the leading end causes the drive shaft 4 to perform reciprocating rotation about the axis through the cam follower 46. Rotating brushing for reciprocatingly rotating the tooth-blading body 6 around the shaft of the handle can be performed. The rotation direction of the motor 40 is determined by which of the two push-on switches 21 and 22 arranged on the surface of the main body 1 is operated. These push-on switches 21, 22
Are arranged in a row with a push-off switch 23 interposed therebetween. Then, as shown in FIG.
Behind these switches 21, 22, 23 formed as a part of 20, a hook 26 is hooked to the main body 1 so that a seesaw can be moved by a shaft 27 to a mounting table 25 attached to the main body 1. Switch levers 31 and 32 are provided. The switch lever 31 has a protrusion 31a at one end behind the push-on switch 21 and a protrusion 31b at the other end behind the push-off switch 23, and the switch lever 32 pushes the protrusion 32a at one end on the push-on switch 22. Behind the other end of the convex portion 32b
Is located behind the push-off switch 23,
Each of them has a click projection 33 which selectively engages with two grooves 28, 28 formed on the mounting base 25, so that a click can be given for the rotation about the shaft 27. In the figure, reference numeral 24 denotes a switch cover fixed to the main body 1 by welding and fixing the periphery of the switch rubber 20 at this time. As shown in FIG. 5, four fixed conductive plates 61 to 64 and a reversing lever 35 are disposed on the surface of the chassis 13. Each of the conductive plates 61 and 62 has one end connected to the motor 40, and each of the conductive plates 61 and 62 has two contact springs 61a, 61b and 6 respectively.
2a and 62b are provided integrally, and the contact spring 61a and the contact spring 62a are arranged in parallel, and the contact spring 61b and the contact spring 62b are arranged in parallel. The conductive plate 63 is a contact spring 61a, 62b
Are provided with two contact portions 63a and 63b which can freely contact the
Reference numeral 4 denotes two contact portions 64a, 64a, which can freely contact the contact springs 62a, 61b, respectively.
64b. The conductive plates 63 and 64 are connected to the respective poles of the storage battery 5 via battery contact plates 65 and 66 mounted on the battery holder 50. The battery contact plate 65 which contacts the contact portion 63C of the conductive plate 63 contacts the lower pole of the storage battery 5 in the drawing via the outer surface of the battery holder 50, and the battery contact plate 66 which contacts the conductive plate 64.
Contacts the upper pole of the storage battery 5 in the figure. As shown in FIGS. 2 and 6, the contact portions of the battery contact plates 65 and 66 with the storage battery 5 are bent into loops, respectively, and an elastic body 67 such as rubber is fitted into the loops. When assembled in the main body 1, the contact pressure between the battery contact plates 65 and 66 and the storage battery 5 is maintained between the chassis 13 and the cover 12. The reversing lever 35 is provided with a groove 16 formed on the surface of the chassis 13.
A projecting portion protruding from the central portion is positioned inside and is supported movably on a seesaw.
, The other end is located behind the switch lever 32. Now, when in the off state, the respective contact springs 61a, 61b, 62a, 62b are away from the contact portions, respectively, as shown in FIG.
Each switch lever 31, 32 is a push-on switch 21,
The convex portions 31a and 32a located behind the 22 protrude forward from the convex portions 31b and 32b located behind the push-off switch 23. When the push-on switch 22 is pushed in from this state, as shown in FIG. 8, the switch lever 32 swings and presses the contact springs 61b and 62b to bring them into contact with the contact portions 64b and 63b. In other words, Fig. 10 (b)
In order to connect the motor 40 and the storage battery 5 in the state shown in
The motor 40 starts rotating in one direction. If you push the push-off switch 23 from this state,
Since the projection 32b of the switch lever 32 is pushed, the switch lever 32 returns to the state shown in FIG. If you push the push-on switch 21 from the off state,
As shown in FIG. 9, the switch lever 31 swings and presses the contact springs 61a and 62a, and these are pressed by the contact portions 63a and 64a.
, That is, in order to connect the motor 40 and the storage battery 5 in the state shown in FIG. 10 (c), the motor 40 starts to rotate in the opposite direction. If you push the push-off switch 23 from this state,
Since the projection 31b of the switch lever 31 is pressed, the switch lever 31 returns to the state shown in FIG. Further, if the push-on switch 22 is pushed in when the push-on switch 21 is pressed, that is, in the state shown in FIG.
In addition to pressing the reversing lever 35, one end of the reversing lever 35 is also pressed to rotate the reversing lever 35.Before the contact springs 61b, 62b contact the contact portions 64b, 63b, the reversing lever is rotated. At the other end of 35, the switch lever 31 is pressed to return the switch lever 31, and the contact springs 61a, 62a are connected to the contact portion 63.
a, 64a away from. Conversely, if the push-on switch 21 is pushed in when the push-on switch 22 is pressed in the state shown in FIG. 8, the switch lever 31 pushes the contact springs 61a, 62a and one end of the reversing lever 35, and the reversing lever 35 To rotate the contact springs 61a,
Before the contact point 62a contacts the contact portions 63a and 64a, the switch lever 32 is pressed by the other end of the reversing lever 35 to return the switch lever 32, and the contact springs 61b and 62b are separated from the contact portions 63b and 64b. In other words, the last operated one of the push-on switches 21 and 21 and the push-off switch 23 is effective, and in selecting the two operations, it is possible to directly select and execute the required operation. In addition, it is possible to perform the transition from one operation to the other operation without going through the OFF operation.

【The invention's effect】

As described above, in the present invention, if any of the push-on switches is operated from the off state, the operation obtained by the push-on switch is performed. Even if the push-on switch is operated, the push-on switch that was in the ON state returns and the later-operated push-on switch becomes effective, and always directly selects two different operations. And the operability is very good. In addition, when one of the push-on switches is pressed, the switch lever that performs the seesaw operation when pressed by this switch operates in the direction to push back the push-off switch, and the reversing lever that is pressed by the switch and performs the seesaw operation is the other. When the push-on switch is pushed, the two switch levers which are pushed by this switch and perform the seesaw operation operate in the direction of pushing the push-on switch back, respectively. Since the different switches are pushed back by the lever that performs the seesaw movement, it is possible to reliably obtain a state in which only one of the switches is pushed in, and each lever performs the seesaw movement so that the pushed switch is Press the switch to push back a different switch. The force required to those living lightly be said push back the other switches.

[Brief description of the drawings]

1 is a longitudinal sectional view of one embodiment of the present invention, FIG. 2 is a cutaway front view of the same, FIG. 3 is a perspective view of the same, FIG. 4 is an exploded perspective view of a switch part of the same, and FIG. FIG. 6 is a perspective view of a battery contact plate, FIGS. 7 to 9 are cross-sectional views showing a switch operation, and FIGS. 10 (a), (b) and (c).
Is a circuit diagram of the above, wherein 21 and 22 are push-on switches, 23 is a push-off switch, 31 and 32 are switch levers, and 35 is a reversing lever.

Claims (1)

(57) [Claims] 1. A push switch having two push-on switches for performing different operations, a push-off switch disposed between the push-on switches, and being turned on by operating the push-off switch. A switch comprising: first return means for returning an on-switch; and second return means for returning the other push-on switch from an on state by operation of one of the push-on switches. A push-off switch is provided between the on-switches, and the first return means is disposed movably on a seesaw between the one push-on switch and the push-off switch so that the other switch can be operated by pushing down one switch. First push up
A switch lever and a second switch lever disposed so as to be movable seesaw between the other push-on switch and the push-off switch and pushing up the other switch by pushing down one switch, and the second return means is A switch comprising a reversing lever which is disposed between one push-on switch and the other push-on switch so as to be movable in a seesaw, and pushes up one switch by pushing down another switch.