JP2878417B2 - Selector switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a changeover switch, and more particularly to a changeover switch used for a small device such as an electric toothbrush.

[Prior art]

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

[Problems to be solved by the invention]

However, when such a reed switch is arranged,
The arrangement space of the reed switch becomes large, and it is difficult to reduce the size of the device. SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and an object of the present invention is to provide a changeover switch which does not take up space in the arrangement of two reed switches.

[Means for Solving the Problems]

Thus, according to the present invention, a first reed switch in which a first resistor is connected in parallel and a second reed switch in which a second resistor is connected in series are connected in parallel and these reed switches and A resistor is disposed in parallel along the inner peripheral surface of the housing, and the first magnet and the second magnet that individually turn on / off each reed switch are disposed at positions shifted in the direction of relative movement with respect to the reed switch. At the same time, switching between the three states of turning off both reed switches, turning on only the second reed switch, turning on both the first and second reed switches, or turning on only the first reed switch is performed. A first housing provided with a cylindrical housing and a handle on which an axial slide of the housing is freely arranged on an outer surface of the housing; Are connected in parallel and a second reed switch in which a second resistor is connected in series and are arranged in parallel in the housing, and each reed switch is connected in parallel. The first magnet and the second magnet, which are individually turned on and off, are arranged at positions displaced in the direction of relative movement with respect to the reed switch on the handle formed in a C-shaped cross section avoiding other switch operation parts. At the same time, switching between the three states of turning off both reed switches, turning on only the second reed switch, turning on both the first and second reed switches, or turning on only the first reed switch is performed. It has two features. [Operation] According to a first feature of the present invention, two reed switches and two resistors are arranged in parallel along the inner peripheral surface of the housing while being capable of performing multi-stage switching. Therefore, the four members can be arranged in a small space utilizing the dead space, and according to the second feature of the present invention, they are arranged in parallel in a cylindrical housing. The two magnets for individually turning on and off the two reed switches are disposed on a handle formed on the outer surface of the housing and having a C-shaped cross section which is free to slide in the axial direction of the housing and avoids other switch operation parts. Therefore, the entire outer diameter including the handle provided with the magnet can be reduced. [Embodiment] Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. The illustrated example is an electric toothbrush, and a motor 10 as a power is disposed inside a cylindrical housing 1. And a motion converter for selectively converting the rotational output of the motor 10 into an axial reciprocating motion of the output shaft 11 protruding from one end of the housing 1 and a reciprocating rotational motion about the axis in accordance with the rotational direction. A mechanism (not shown) is provided.
In the figure, reference numeral 12 denotes a packing for waterproofing the protruding portion of the output shaft 11, and reference numeral 13 denotes a cover for protecting the packing 12. On the side of the housing 1, three push buttons 21, 22, 23
And a push button as shown in FIG.
A handle 3 having a C-shaped horizontal section avoiding the arrangement portions 21, 22, and 23 is slidably disposed. The handle 3 has a convex portion 35 on the inner surface thereof.
When sliding 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 attached to the main body 1 by an attachment frame 24. The push button 21 at one end turns on the contact portion 25 when pushed. The output shaft 11 is reciprocated linearly by the motor 10, and the push button 23 at the other end turns on the contact 26 to cause the motor 10 to reciprocally rotate the output shaft 11. The center push button 22 is for returning the push buttons 21 and 23 to turn off the contact portions 25 and 26. By the way, in this electric toothbrushing, a changeover switch for changing over the number of rotations of the motor 10 is provided. This changeover switch is provided in parallel with the frame in the motion conversion mechanism provided in the housing 1. A pair of reed switches 41 and 42 attached thereto and a pair of magnets 3 attached to the inner surface of the handle 3 by an attachment frame 33.
As shown in FIG. 5 and subsequent figures, a resistor 43 connected in parallel to a reed switch 41 and a resistor 44 connected in series to a reed switch 42.
41 and 42 are connected in parallel, and both reed switches 41 and 42 and resistors 43 and 44 are arranged in parallel along the inner peripheral surface of the housing 1. Further, magnets 31 and 32 of the handle 3 In the sliding direction, the lens is mounted at a slightly shifted position. Now, when the handle 3 is located at the lowermost position as shown in FIG. 1, the reed switches 41 and 42 are both outside the influence of the magnets 31 and 32, and as shown in FIG. ,Four
2 are both OFF, and a resistor 43 is connected to the motor 10 in series, so that the rotation speed of the motor 10 is the slowest. In this state, as shown in FIG. 3, if the handle 3 is moved upward by one step and the reed switch 42 is turned on by the magnet 32, the parallel circuit of the resistors 43 and 44 is connected in series with the motor 10 as shown in FIG. , And the rotation speed of the motor 10 becomes the medium speed. As shown in FIG. 4, if the handle 3 is further moved upward so that both the reed switches 41 and 42 are turned on by the magnets 31 and 32, the reed switch 41 short-circuits the resistors 43 and 44. Therefore, the rotation speed of the motor 10 becomes highest.
At this point, the reed switch 42 may be off. 2, the handle 3 is attached to the housing 1 by engaging the hooks 34, 34 provided on both side edges thereof with the vertical grooves 18, 18 provided in the housing 1. In addition to these, a projection 35 provided on the inner surface of the central portion of the handle 3 is provided.
The sliding range of the handle 3 is set by engagement of the handle 3 with the vertical groove 19 of the housing 1, and the handle 3 can be removed from the housing 1 by pushing up the lower end of the center of the handle 3.

【The invention's effect】

As described above, in the present invention, four reed switches and two resistors are arranged in parallel along the inner peripheral surface of the housing while four reed switches and two resistors can be switched in multiple stages. The above-mentioned member can be arranged in a small space utilizing a dead space. Therefore, when used in a small device such as an electric toothbrush, the small device can be formed thin. According to the second feature of the present application, two magnets for individually turning on and off two reed switches arranged in parallel in a cylindrical housing are arranged on the outer surface of the housing, and are arranged in the axial direction of the housing. The outer diameter of the entire handle, including the magnet-equipped handle, can be reduced because the handle is slidable and arranged on a handle having a C-shaped cross section avoiding other switch operation parts. In addition, since the handle has a C-shaped cross section, the handle and another switch operation unit can be arranged at the same position in the axial direction of the housing without interfering with each other. When used in such a small device, the small device can be slender and have a shorter overall length in the axial direction. In any case, it is suitable as a changeover switch for a device that is small and requires waterproofness.

[Brief description of the drawings]

1 (a) and 1 (b) are a longitudinal sectional view and a transverse sectional view of one embodiment of the present invention, FIG. 2 is a horizontal sectional view of the same, FIG. 3 and FIG. FIGS. 5 to 7 are circuit diagrams of the same, where 1 is a housing, 3 is a handle,
31 and 32 are magnets, 41 and 42 are reed switches, and 43 and 44 are resistors.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-42381 (JP, A) JP-A-48-362 (JP, U) JP-A-2-65103 (JP, U) JP-A-2- 65104 (JP, U) JP 486344 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01H 36/00 H01H 15/00 A46B 13/02

Claims (2)

(57) [Claims] 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 the reed switch and the resistor are connected in parallel. Are arranged in parallel along the inner peripheral surface of the housing, and turn on / off each reed switch individually.
And the second magnet are arranged at positions shifted in the direction of relative movement with respect to the reed switch, and both magnets are turned off, only the second reed switch is turned on, and the first and second magnets are turned off. A changeover switch for switching between three states: turning on both reed switches or turning on only a first reed switch. 2. A first reed switch having a cylindrical housing, a handle having an axially slidable housing disposed on an outer surface of the housing, and having a first resistor connected in parallel, and a second reed switch. A first magnet and a second magnet, which are connected in parallel with a second reed switch in which the resistors are connected in series and are disposed in parallel in the housing, and individually turn on / off each reed switch, The handle, which is formed in a C-shaped cross section avoiding other switch operation parts, is disposed at a position shifted in the direction of relative movement with respect to the reed switch, and when both reed switches are turned off, only the second reed switch is provided. And the first
A changeover switch for turning on and off the second reed switch or turning on only the first reed switch.