JPH0228577Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) This invention is useful for switching devices such as voltage switchers that switch the voltage on the primary side of a transformer, for example, when electrical products are used in areas with different voltages. Concerning vessels.

(Prior Art) Conventionally, as shown in FIG. 1, this type of switching device has a plurality of connecting terminals 3 protruding from the inner bottom periphery of an opening 2 formed on the top surface of the switching device 1, and An annular terminal 5 is provided at the center of the inner bottom surface of the portion 2,
Then, a plate-shaped contact piece 7 having one end protruding and forming a contact 6 selectively connected to each connection terminal 3 is fitted into the selector 8, and this selector 8 is inserted into the opening 2.
The switch 1 is fitted into the inside of the switch 1 and is rotatably locked by a screw 9 from the lower part of the switch 1. In this assembled state, the contact piece 7 is in contact with the annular terminal 5, and by rotating the selector 8, the contact piece 7
The contact point 6 was brought into selective contact with the upper part of one of the connection terminals 3.

However, in this switch, since the contact piece 7 is formed in a flat plate shape, when rotating the contact piece 7,
The side of the contact 6 of the contact piece 7 comes into contact with the side of the protruding connection terminal 3, and a strong force is required to cause the contact 6 of the contact piece 7 to cross over the side of the connection terminal 3 and connect to the top. Therefore, there was a problem in that excessive force was applied to the contact piece 7 and the connecting terminal 3, causing them to deform, resulting in poor contact and the like.

There is also a roller contact type switch, as described in, for example, Japanese Utility Model Application Publication No. 149274/1983. This switch has a plurality of connection terminals arranged on the inner circumferential surface of a cylindrical housing, and a rotating shaft that rotates when switching is arranged in the center of the housing. A plurality of contact supports are arranged at equal intervals, and a bracket with a roller rotatably attached to the tip of each contact support is attached so as to be movable in the radial direction, and the bracket is pressed outward by a spring. That's what I do. The roller at the tip of each bracket is pressed into contact with the connection terminal by the pressure of the spring, and when the rotation shaft is rotated, the contact support and bracket rotate as one, making the connection. Since the rollers in contact with the terminals roll, they move smoothly, eliminating the problem of deformation of the connecting terminals, etc.

(Problems that the invention aims to solve) However, the roller contact type switching device as described above has many parts and a complicated structure, which not only makes assembly extremely troublesome, but also makes it large and expensive. There is.

The present invention has been developed in view of these points, and aims to provide a switching device that can prevent contact failures caused by deformation of contact pieces and connection terminals, has a simple structure, and is easy to assemble. This is the purpose.

[Structure of the idea]

(Means for Solving the Problems) The present invention has a container 10 having a circular opening 12 formed on the top surface, and a container 10 having a circular opening 12 formed along the inner peripheral surface of the opening 12. A plurality of connecting recesses 3 are provided on the inner surface facing into the opening 12.
4 connection terminals 30, 31, 32, 33,
disposed at the center of the opening 12 of the vessel body 10,
A common shaft 59 having a fitting groove 60 at its upper end protruding into the opening 12 and the opening 12 of the vessel body 10.
It has a selector 40 that is rotatably fitted into the selector 5, and an annular piece 51 with one cutout.
A mounting portion 52 to be attached to the lower surface of the selector 40 and a fitting portion 54 to be fitted and connected to the fitting groove 60 of the common shaft 59 are provided at one end of the annular piece portion 51 corresponding to the rotational direction of the annular piece 51. A contact piece 50 is provided at the other end of the portion 51 with a contact portion 53 that elastically projects outward in the radial direction and that fits into the connection recess 34 of the connection terminal 30, 31, 32, 33 to enable connection. It is something.

(Function) In the present invention, the mounting portion 52 is provided on the bottom surface of the selector 40.
Fitting portion 54 of contact piece 50 attached via
By fitting the contact piece 50 into the fitting groove 60 of the common shaft 59 disposed in the container body 10, the contact piece 50 and the common shaft 59 can be mechanically coupled and electrically connected.

Then, the selector 40 is inserted into the opening 12 of the vessel body 10.
In the assembled state where the contact piece 50 is fitted, the contact portion 5 of the contact piece 50
3 is a connection recess 3 of any one of the connection terminals 30, 31, 32, 33 that elastically protrudes radially outward from the selector 40 and is disposed on the inner peripheral surface of the container body 10.
4 to ensure electrical connection and maintenance of the connected state.

Then, when the selector 40 is turned, the selector 40
The contact piece 50 rotates integrally with a certain connection terminal 3.
The contact portion 53 of the contact piece 50 which had been elastically fitted and connected to the connection recess 34 of Nos. Connection terminals 30, 3 adjacent in the rotation direction
It is fitted and connected to the connection recesses 32 of Nos. 1, 32, and 33.

The contact portion 53 of the contact piece 50 has elasticity in the radial direction, and the connection terminals 30, 31, 3
2 and 33 are arranged facing the same surface as the inner peripheral surface of the container body 10, so that the contact portion 53 of the contact piece 50 can be easily slid along the inner peripheral surface of the container body 10. I have to.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. 2 to 5.

In the figure, reference numeral 1 denotes a voltage switching device body made of insulating material such as synthetic resin, which has a cylindrical body 10 with open upper and lower surfaces, and a partition plate 11 provided at the center of the inside of the vessel 10 with openings on the upper and lower surfaces of the vessel 10. 12 and 13 are formed respectively, and a flat part 14 is formed on one side of the vessel body 10.
is formed.

A hollow cylindrical portion 16 having a through hole 15 penetrating into the lower opening 13 on the partition plate 11 is formed in the upper opening 12 to protrude upward. A guide frame 17 is formed in a protrusive manner, and an inclined part 19 is formed on the inner wall 18 and widens upward. A plurality of insertion grooves 21 are formed to face each other and pass through the side openings 13.

The cylindrical portion 16 protrudes from the lower surface of the partition plate 11 and the insertion hole 15 passes through the lower opening 13;
A plurality of terminal holding portions 23 are formed in the inner wall 22, through which the plurality of insertion grooves 21 respectively pass.

Slit-shaped notch grooves 24, 25, and 26 communicating with the lower opening 13 are formed in the flat portion 14.

Further, 30, 31, 32, 33 are connection terminals, respectively.
, contact piece parts 30a, 31a, 32a, 33a having a connection recess 34 at the upper side surface are formed at one end, respectively, and lead-out piece parts 30b, 31b, at the other end.
32b and 33b are formed. These contact pieces 30a, 31a, 32a, 33a are connected to the container body 10.
are inserted into the insertion grooves 21 from below and face the same surface as the inner wall 18 of the upper opening 12, and
The lead-out pieces 30b, 31b, 32b are connected to the container body 10.
The lead-out piece 33b is projected outside through the notch grooves 24, 25, 26, and the lead-out piece 33b is connected to the lead-out piece 30b.
It protrudes to the outside through the notch groove 24 with a space therebetween.

Further, 40 is an opening 12 on the upper side of the vessel body 10.
This selector 40 is formed into a cylindrical shape with an open bottom and has a disc-shaped selector plate 41.
An elongated groove 42 for rotation operation is formed on the upper surface of the selector plate 41, and a cylinder frame 44 is formed protruding from the lower side of the selector plate 41 with a stepped portion 43 formed around the periphery. A notch 45 is formed in the selector plate 41, a cylindrical portion 46 protrudes downward from the center of the lower surface of the selector plate 41, an engagement hole 47 is formed inside, and a protrusion 48 is formed protruding from the side of the cylindrical portion 46. .

Further, 50 is a contact piece that fits into the lower part of the selector 40, and has an annular piece part 51 with one notch. A plurality of mounting holes 52 are formed as a mounting part to be mounted on the lower surface, and the mounting holes 52 are fitted into the projections 48 of the selector 40, and the tips of the projections 48 are welded and mounted. A contact portion 53 is formed at the other end of the portion 51 and elastically projects outward from the notch portion 45 . Further, one end of the annular piece portion 51 is provided with a fitting groove 6 for a common shaft 59, which will be described later.
A fitting piece part 54 is formed as a fitting part to be fitted and connected to 1, and this fitting piece part 54 is formed to protrude in a substantially U-shape, and a fitting hole 55 is formed in the center thereof. At the same time, the locking frame 5 is removed from the fitting hole 55.
A long groove 56 that divides the four parts is formed on a straight line.

Also, 59 is a common shaft, and this common shaft 59
The lower side is inserted into the insertion hole 15 of the prefiller body 10, and the upper side is inserted into the engagement hole 47 of the selector 40, and the contact piece 50 is fitted into the upper end thereof. A fitting groove 60 is formed into which the piece 54 is fitted and connected, and a locking groove 61 into which a common contact to be described later is fitted is formed at the lower end. Note that the lower end of the common shaft 59 inserted into the insertion hole 15 protrudes from the lower end of the cylindrical portion 16.

Further, 63 is a common contact, and a bifurcated locking piece 64 is formed at one end, and this locking piece 64
A recess 65 is formed approximately at the center of the opposing inner sides, and a lead-out piece 66 is formed at the other end. The locking piece 64 of the common contact 63 is fitted into the locking groove 61 of the common shaft 59 that protrudes from the lower end of the cylindrical portion 16, and the recess 65 is fitted into the locking groove 61 to prevent the common shaft 59 from coming off. Then, the lead-out piece 66 is projected to the outside from the notched groove 25.

Further, locking portions 68 are formed at the lower portions of both sides perpendicular to the flat portion 14 of the container body 10, and the locking portions 68
The locking protrusions 70 formed on both sides of the lid body 69 having substantially the same shape as the lower opening 13 engage with each other, and the lid body 6
9 closes the opening 13.

In addition, each lead-out piece portion 30b, 31b,
A locking hook portion 71 that locks onto a circuit board is protruded from the flat portion 14 of each of the projecting parts 32b, 33b, and 66, and a mounting piece portion 72 is protruded from the top of both sides perpendicular to the flat portion 14 of the container body 10. Each of the mounting pieces 72 is provided with screw holes 73 for screwing the container body 10 to the chassis.

Next, the operation of this embodiment will be explained.

When assembling the switch, the common shaft 59 is press-fitted into the fitting hole 55 between the fitting pieces 54 of the contact piece 50 attached to the lower surface of the selector 40, and the contact piece 50
The fitting piece portion 54 of the selector 40 is fitted into the fitting groove 60 of the common shaft 59 to maintain electrical connection and the connected state.
0, 31, 22, and 33 are fitted into the upper opening 12 of the container body 10, and the common contact 63 is engaged with the locking groove 61 of the common shaft 59 that protrudes from the lower end of the cylindrical portion 16 of the container body 10. By connecting them together to prevent the selector 40 from coming off and making electrical connection, and by fitting the lid 69 into the opening 13 of the container body 10, assembly can be easily performed.

In this assembled state, the contact portion 53 of the contact piece 50 elastically protrudes radially outward from the selector 40, and connects the connection terminals 30, 31, 32, 30 disposed on the inner peripheral surface of the container body 10. Connection recess 34 of any of the contact piece parts 30a, 31a, 32a, 33a
It is elastically fitted and press-contacted to achieve positioning and electrical connection.

Next, when switching the voltage, when the selector 40 is turned, the contact piece 50 rotates integrally with the selector 40, and the contact piece parts 30a, 31a, 32a, 33a of a certain connection terminal 30, 31, 32, 33 are connected. The contact portion 53 of the contact piece 50, which had been elastically fitted and pressed into the recess 34, separates from the connection recess 34 and slides on the inner wall 18 surface of the container body 10, thereby contacting the contact piece 30a adjacent in the rotation direction. , 31a, 32a, 33a, and the voltage contact pieces 30a, 31a, 32a, 33a are connected by fitting into the connection recesses 34 of the contact pieces 30a, 31a, 32a, 33a, and the voltage is switched by moving the contact part 53 in this way.
4 is fitted and connected.

Note that when turning the selector 40, each contact piece 3
Since 0a, 31a, 32a, and 33a are arranged on the same surface as the inner wall 18, the contact portion 5 of the contact piece 50
Each contact piece part 30a, 31 without being caught
a, 32a, 33a, and the contact portion 53 of the contact piece 50 has elasticity in the radial direction. 32a, 33a in a state where they are fitted and connected to the connection recesses 34, and
It can be easily removed from the connection recess 34 and can be easily slid along the inner wall 18 of the container body 10.

[Effect of idea]

According to the present invention, the mounting part and the fitting part are provided at one end of the annular piece of the contact piece, and the contact part that elastically projects outward in the radial direction is provided at the other end. The electrical connection between the contact piece and the common shaft and the connection state can be maintained by simply fitting the fitting part of the contact piece that is attached to the common shaft into the fitting groove of the common shaft arranged on the container body. In addition, due to the radial elasticity of the contact portion of the contact piece, it is possible to maintain an electrically connected state fitted into the connection recess of the connection terminal disposed along the inner circumferential surface of the container body, and It is possible to move smoothly on the inner circumferential surface of the container body without getting caught on the connecting terminals arranged facing the same surface, and it is possible to prevent connection failures due to deformation of the contact pieces and connecting terminals. Therefore, it is possible to provide a switch that has a simple structure, is easy to assemble, and ensures reliable switching.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a conventional switching device, Fig. 2 is an exploded perspective view of an embodiment of the switching device of the present invention, Fig. 3 is a plan view of the device body, and Fig. 4 is an exploded perspective view of a conventional switching device. FIG. 5 is a bottom view of the container body, FIG. 5 is a bottom view of the selector, and FIG. 6 is a sectional view of the assembled state. 1... Switching device, 10... Container body, 12... Opening, 30, 31, 32, 33... Connection terminal, 40
...Selector, 50...Contact piece, 51...Annular piece part, 52...Mounting hole as a mounting part, 53...Contact part, 54...Fitting piece part as a fitting part, 59...
...Common shaft, 60...Fitting groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A container body with a circular opening formed on the top surface, a plurality of containers arranged along the inner peripheral surface of the opening of the container so as to face the same inner peripheral surface, a connection terminal having a connection recess on an inner surface facing into the opening; a common shaft disposed at the center of the opening of the container body and having a fitting groove at an upper end protruding into the opening; A selector that is rotatably fitted into the opening, an annular piece with one cutout, and a mounting part that is attached to the lower surface of the selector at one end of the annular piece that corresponds to the rotational direction of the selector, and the common. A fitting part is provided to be fitted and connected to the fitting groove of the shaft, and a contact part is provided at the other end of the annular piece to elastically protrude outward in the radial direction so as to be able to be fitted and connected to the connection recess of the connection terminal. A switching device characterized by comprising a contact piece provided therein.