JPH0487127A - Changeover switch - Google Patents

Abstract

PURPOSE:To obtain a changeover switch whose two lead switch arrangement does not require much space, by connecting in parallel the 1st lead switch which connects with the 1st resistance in parallel, with the 2nd lead switch which connects with the 2nd resistance in series, and at the same time installing them in parallel. CONSTITUTION:A motor 10 rotation number changeover switch is provided. This consists of a pair of lead switches 41, 42 fitted in parallel to a frame at a movement conversion mechanism within a housing 1, a pair of magnets 31, 32 fitted to the inner surface side of a handle 3 by means of a fitting frame 33, a resistance 43 connected with the switch 41 in parallel, and a resistance 44 connected with the switch 42 in series. And both lead switches 41, 42 are connected with each other in parallel, and in addition, magnets 31, 32 at the handle 3 are fitted slightly shifted positions in a handle 3 slide direction. As a result, both lead switches 41, 42 are arranged in a limited space taking advantage of dead space.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a changeover switch, and particularly to a changeover switch used in small appliances such as electric toothpastes.

[Conventional technology]

When adding a function to switch the strength of a small device such as an electric toothbrush that requires waterproofness, a reed switch is used because it is easy to ensure waterproofness. When two reed switches are provided so that switching can be performed in multiple stages, conventionally the two reed switches are arranged in a straight line along the moving direction of a magnet for turning the reed switch on and off.

[Problem to be solved by the invention]

However, if the reed switch is arranged in this way, the space for arranging the reed switch becomes large, making it difficult to downsize the device. The present invention has been made in view of these points, and its object is to provide a changeover switch that does not take up much space when arranging two reed switches.

[Means to solve the problem]

However, the present invention provides a first resistor connected in parallel with the first resistor.
and a second reed switch in which a second resistor is connected in series are connected in parallel and arranged in parallel, and a first magnet and a second magnet individually turn on and off each reed switch. is arranged at a position shifted in the direction of relative movement with respect to both reed switches, and can turn both reed switches off, only the second reed switch on, and both the first and second reed switches on or off. It is characterized by switching between three states: only the first reed switch is on. [Function] According to the present invention, not only can switching over multiple stages be performed, but since the two reed switches are arranged in parallel, both reed switches can be arranged in a small space by utilizing dead space. It is something. [Example] The present invention will be described in detail below based on the illustrated embodiment. The illustrated example is an electric tooth swinger, and a motor 10 as a power source is disposed inside a cylindrical housing 1. The output shaft 1 protrudes from one end of the housing 1 according to the rotational direction of the motor 10.
A motion conversion mechanism (not shown) that selectively converts the reciprocating motion in the axial direction of 1 and the reciprocating rotational motion around the axis is provided. 12 in the figure waterproofs the protruding portion of the output shaft 11. The gasket 13 is a cover that protects the gasket 12. There are three push buttons 21 and 22 on the side of the housing 1.
．． 23, and as shown in FIG. 2, a handle 3 having a C-shaped horizontal section is slidably provided. This handle 3 has a convex portion 3 on its inner surface.
5, and when the housing 1 is slid in the axial direction, positioning is performed at three positions by engagement with three click recesses 15 formed on the outer peripheral surface of the housing 1. The push buttons 21, 22, and 23 are integrally formed of an elastic waterproof material such as rubber and are attached to the main body 1 by a mounting frame 24. The push button 21 at one end turns on the contact portion 25 when pushed in. The motor 10 causes the output shaft 11 to perform reciprocating linear motion, and the push button 23 at the other end turns on the contact portion 26 to cause the motor 10 to perform the reciprocating rotational motion of the output shaft 11. The center push button 22 is the same as each push button 21, 2.
3 is returned to turn off the contact portions 25 and 26. Now, in this electric tooth brushing, a changeover switch is provided to change the rotation speed of the motor 10, and this switch is installed in parallel to the frame of the above-mentioned motion conversion mechanism provided in the housing 1. As shown in FIG. It consists of a resistor 43 connected and a resistor 44 connected in series to the 5-reed switch 42, both reed switches 41, 42 being connected in parallel, and magnets 31, 32 in the handle 3. It is attached at a slightly shifted position in the sliding direction of the Now, when the handle 3 is located at the lowest position as shown in FIG.
As shown in FIG. 5, both reed switches 41 and 42 are off, and the motor 10 is
are connected in series, and for this purpose the motor 10
The rotation speed is the slowest. From this state, as shown in FIG. 3, if the handle 3 is moved one step upwards and the magnet 32 turns on the reed switch 42, a parallel circuit of resistors 43 and 44 is connected in series to the motor 10, as shown in FIG. The motor 10 is now connected to the motor 10.
The rotation speed of is medium speed. As shown in FIG. 4, if the handle 3 is moved further upward so that both reed switches 41.42 are turned on by magnets 31.32, reed switch 41 shorts both resistors 43.44. Therefore, the rotational speed of the motor 10 becomes the highest. Note that the reed switch 42 may be turned off at this point. Further, as is clear from FIG. 2, the handle 3 here is attached to the housing 1 by engaging the hooks 34, 34 provided on both side edges of the handle 3 in the longitudinal grooves 18° 18 provided in the housing 1. In addition to these, the sliding range of the handle 3 is set by the engagement between the protrusion 35 provided on the inner surface of the central part of the handle 3 and the vertical groove 19 of the bouncing 1. The handle 3 can be removed from the housing 1 by pushing up the central lower end of the handle.

【Effect of the invention】

As described above, in the present invention, not only can switching over multiple stages be performed, but since the two reed switches are arranged in parallel, both reed switches can be arranged in a small space by utilizing dead space. It is suitable as a changeover switch for equipment that requires small size and waterproofness.

[Brief explanation of drawings]

FIGS. 1(a) and 4(b) are longitudinal and cross-sectional views of one embodiment of the present invention, FIG. 2 is a horizontal cross-sectional view of the same, and FIGS. 3 and 4 are cross-sectional views when the handle is operated. Figures 5 to 7 are circuit diagrams of the same as above, in which 1 is a housing, 3 is a handle, 31.32 is a magnet, 41°42 is a reed switch, 4
3.44 indicates resistance. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 1...Housing Figure 1 (b) Figure 2 Figure 4 Figure 3 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] (1) A first reed switch having a first resistor connected in parallel and a second reed switch having a second resistor connected in series are connected in parallel and arranged in parallel;
The first magnet and the second magnet, which individually turn on and off each reed switch, are arranged at shifted positions in the direction of relative movement with respect to both reed switches, and turn off both reed switches, and only the second reed switch. A changeover switch characterized in that it performs switching between three states: on, on, both the first and second reed switches, or only the first reed switch.