JP3858303B2 - Automatic reset slide switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic return type slide switch mainly used for consumer electronic devices.
[0002]
[Prior art]
This conventional technique will be described with reference to FIGS. 5 and 6. FIG.
[0003]
FIG. 5 is an exploded perspective view of a conventional general automatic return slide switch, and FIG. 6 is a sectional view thereof.
[0004]
In the figure, reference numeral 1 denotes a box-shaped case made of a molded resin and having an open top surface. The bottom of the case is divided in a direction perpendicular to the sliding direction by a partition material 1A disposed along the sliding direction of a sliding body 3 described later. 1 and the second space chambers 1B and 1C are divided into a plurality of fixed contacts 2D, 2E and 2F each having connection terminal portions 2A, 2B and 2C along the longitudinal direction thereof. The connection terminal portions 2A, 2B, and 2C project laterally from the first side wall 1D, and the second space chamber 1C serves as a housing portion for the coil spring 6 for automatic return.
[0005]
Reference numeral 3 denotes a sliding body made of a molded resin, which is guided by one side wall 1D of the case 1 and the partitioning material 1A to reciprocate linearly. The fixed contacts 2D, 2E, 2F in the space chamber 1B are slidably contacted and short-circuited, and an operating lever 5 is integrally formed on the sliding body 3, and the operating lever 5 is externally provided. A notch 1F is provided in the side wall 1E of the second space chamber 1C of the case 1 for projecting.
[0006]
Note that the operating lever 5 is opposite to the connection terminal portions 2A, 2B, and 2C of the fixed contacts 2D, 2E, and 2F for convenience when the automatic return type slide switch is mounted on the wiring board of the set to be used. The structure is projected in the direction.
[0007]
The coil spring 6 for automatic return housed in the second space chamber 1C of the case 1 is repelled by a certain amount of bending between the wall portion 1G on one short side of the case 1 and the root portion of the operation lever 5. The sliding body 3 is always pressed against the wall 1H on the other short side of the case 1, and in this state, the elastic movable contact piece 4 is short-circuited between the fixed contacts 2E and 2F. .
[0008]
Reference numeral 7 denotes a cover plate made of a metal plate, which serves to hold the sliding body 3 and the coil spring 6 so as not to jump out of the case 1. The operation lever 5 is also projected onto the cover plate 7. A cutout portion 7A is provided.
[0009]
Next, the operation of the conventional automatic return slide switch configured as described above will be described.
[0010]
From the state of FIG. 6, when the sliding body 3 is moved against the repulsive force of the coil spring 6 by applying a force to the operation lever 5 in the direction indicated by the arrow A, the elastic movable contact piece 4 is moved between the fixed contacts 2E and 2F. And the fixed contacts 2D and 2E are short-circuited, and the signal is transmitted to the outside through the connection terminal portions 2A, 2B and 2C.
[0011]
When the pushing force applied to the operating lever 5 is removed, the sliding body 3 is pushed back by the repulsive force of the coil spring 6 to return to the state shown in FIG. 6, and the elastic movable contact piece 4 also moves between the fixed contacts 2E and 2F again. It will be in the state which short-circuits.
[0012]
[Problems to be solved by the invention]
However, in the automatic return type slide switch having the above-described conventional configuration, the sliding body 3 holding the return coil spring 6 and the elastic movable contact piece 4 is housed in the box-shaped case 1 in the assembly work of the switch. However, since the coil spring 6 must have a certain repulsive force when the switch is completed, it is necessary to mount the coil spring 6 while reducing its length from a free length to a certain dimension. In addition, a force is exerted on the sliding body 3 to push it upward by the elastic force of the elastic movable contact piece 4 held at the lower part thereof.
[0013]
Therefore, it is extremely difficult to attach the cover plate 7 while pressing the above-described components that are about to pop out by these forces, and there is a problem that it is difficult to automate the assembly work of the switch.
[0014]
In general, in this type of switch, when the number of turns of the coil spring 6 for automatic return is increased, the stress on the spring material is reduced and the life is increased, but if the number of turns of the coil spring 6 is increased, the coil spring 6 is compressed. The adhesion height of becomes larger. That is, it is necessary to lengthen the side portion of the sliding body 3 that houses the coil spring 6 on the side of the operating lever 5. To that end, it is necessary to bring the operating lever 5 toward the end of the sliding body 3, that is, the end of the case 1. There is also a problem that it is disadvantageous when the switch is used.
[0015]
Furthermore, since the length of the coil spring 6 is larger than the number of turns thereof, when the coil spring 6 is compressed, the intermediate portion is bent and bulges to the side, and the case 1 and the notch portion 1F of the lid plate 7 are expanded. When the operation lever 5 is operated, a crispness may be caused.
[0016]
The present invention is intended to solve such a conventional problem, is easy to assemble and can be automatically assembled, and the operation lever can be arranged at the center of the switch, and the number of turns of the coil spring can be reduced. An object of the present invention is to provide an automatic return type slide switch that does not cause a sensation of crispness when the operation lever is operated.
[0017]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a cover plate that covers the open part of a box-shaped case with a long hole through which a coil spring can be inserted from the outside. Attach only the sliding body holding the elastic movable contact to the cover plate, and then insert the coil spring for automatic return into the case, so that the middle part of the coil spring bends to the bottom side of the case The configuration is arranged .
[0018]
According to the present invention, the coil spring that is the most troublesome to handle in the assembly work of the switch can be easily incorporated into the case, so that the productivity can be greatly improved and the operational feeling can be improved. Is.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is divided into first and second space chambers by a partition material at the bottom, and a plurality of fixed contacts are planted in a straight line in the second space chamber, and each fixed contact A box-shaped case with an open top surface that protrudes outwardly through the bottom surface of the first space chamber, and a plurality of fixed contacts can be moved in the second space chamber along the direction of arrangement of the fixed contacts disposed, the sliding body having integrally an operating lever projecting outwardly of the case from the support and a central portion that protrudes to the first space chamber from one end, is embraced in the lower surface of the sliding body, an elastic movable contact piece which short-circuits in sliding contact between the plurality of fixed contacts, compressed between the side surface and the one wall portion of the short sides of the case with a spring position regulating protrusion of the support portion projecting from the sliding member housed, distribution in the first gas chamber so as to press the sliding body in the wall of the other short side A coil spring that, they consist attached cover plate to the case upper surface to cover, the cover plate of the first space chamber of the upper surface portion to allow insertion of the coil spring from the outside of the long hole of the case And a short cut-and-raised portion is provided from the lid plate slightly inside the short side wall portion in the first space chamber of the case, and the upper part of the end face of the coil spring is brought into contact with the cut-and-raised portion. In addition, the upper surface of the spring position restricting protrusion on the side surface of the support portion of the sliding body has a stepped shape projecting from the lower surface to the wall portion of one short side of the case, and the coil spring is interposed therebetween. The parallel end faces of both ends are elastically contacted, and the middle part of the coil spring is an automatic return type slide switch arranged to bend toward the bottom side of the case . Bullet in the case The cover plate is attached with only the sliding body holding the movable contact piece attached, and then the coil spring for automatic return can be inserted into the case, and the coil spring holding portion and the operating lever of the sliding body are separately arranged. Thus, the operation lever can be arranged at the center of the switch case.
Further, since the upper side between the parallel end faces of both ends of the coil spring is compressed more than the lower side, the middle part of the coil spring is bent to the lower case bottom side, and the slide switch is operated. The coil spring has an effect that it does not cause a crispness when it hits the periphery of the long hole .
[0020]
According to a second aspect of the present invention, in the first aspect of the invention, the upper portion of the spring position regulating protrusion of the support portion protruding from the sliding body is tapered from the root to the tip, and the sliding body is the other short part in the case. A long hole through which the coil spring can be inserted is provided in the cover plate from the position of the side surface having the spring position regulating protrusion of the support portion in a state of being in contact with the side wall portion toward the center of the case. In addition to reducing the size of the long hole, when assembling the switch, when the coil spring is inserted and mounted after the cover plate is attached to the case containing the sliding body holding the elastic movable contact piece, the coil spring is pushed. It has the effect that it can be smoothly inserted and mounted in a state where the size to be reduced is the smallest.
[0022]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
In the present embodiment, the same components as those in the conventional example are given the same reference numerals and the description thereof is omitted.
[0023]
(Embodiment 1)
FIG. 1 is an exploded perspective view of an automatic return slide switch according to a first embodiment of the present invention, and FIG.
[0024]
In the figure, reference numeral 11 denotes a box-shaped case made of a molded resin and having an open top surface. The bottom of the case is divided in a direction perpendicular to the sliding direction by a partitioning member 11A disposed along the sliding direction of a sliding body 13 described later. 1 and a plurality of fixed contacts 12D, 12E, and 12F each having connection terminal portions 12A, 12B, and 12C along the longitudinal direction of the second space chamber 11C. (Not shown) is arranged in a straight line as in the conventional example, but the connection terminal portions 12A, 12B, and 12C pass from the first side wall 11D to the side through the bottom surface of the first space chamber 11B. It has a protruding configuration.
[0025]
The sliding body 13 made of molding resin is guided by the second side wall 11E of the box-shaped case 11 and the partitioning material 11A and reciprocates linearly, whereby the elastic movable contact piece 4 held on the lower surface thereof. Is short-circuited between the fixed contacts 12D, 12E, and 12F (not shown) in the second space chamber 11C as in the conventional example.
[0026]
An operation lever 14 is integrally formed at the center of the sliding body 13 and is configured to project outward from a notch 11F at the center of the second side wall 11E of the case 11. The operation lever 14 and the connection terminal The portions 12A, 12B, and 12C are configured to protrude from the opposite side surface of the case 11 as in the conventional example.
[0027]
A coil spring 6 for automatic return is accommodated in the first space chamber 11B of the case 11, and this coil spring 6 is supported from one end of the sliding body 13 into the first space chamber 11B. Between the side wall of the case 11 and the wall 11G on one short side of the case 11 with a repulsive force caused by a certain amount of bending, and the sliding body 13 is always pressed against the wall 11H on the other short side of the case 11 However, the position restricting protrusion 13B of the coil spring 6 is provided on the side surface of the support portion 13A protruding from the sliding body 13.
[0028]
The position restricting protrusion 13B has a cylindrical upper portion that is tapered from the base to the tip, and is placed in the circular end face 6A of the coil spring 6 to restrict the position.
[0029]
Further, the lid plate 15 made of a metal plate is pressed from above so that the sliding body 13 and the coil spring 6 do not jump out of the case 11. A long hole 15A for allowing the coil spring 6 to be inserted from the outside is formed in the upper surface portion of the first space chamber 11B, and the position of the long hole 15A is such that the sliding body 13 is placed inside the case 11. In a state of being brought into contact with the other short side wall portion 11H, the support portion 13A is provided from the position coinciding with the side surface having the spring position regulating projection 13B toward the center of the case 11.
[0030]
Since the operation of the automatic return slide switch according to the present embodiment configured as described above is the same as that of the conventional example, the description thereof is omitted.
[0031]
Next, an assembling method of the automatic return type slide switch according to the present embodiment will be described.
[0032]
First, in a state where only the sliding body 13 holding the elastic movable contact piece 4 is accommodated in the box-shaped case 11 in which the fixed contacts 12D, 12E, and 12F (not shown) are implanted on the bottom surface, the cover plate 15 is placed. Install.
[0033]
Next, as shown in the cross-sectional view of FIG. 3A, the coil spring 6 is covered with the lid in a state where the operating lever 14 is pushed and the sliding body 13 is brought into contact with the other short side wall portion 11 </ b> H in the case 11. The plate 15 is inserted into the first space chamber 11B of the case 11 in an oblique direction from the long hole 15A, and finally the circular end surface 6A is used for position regulation provided on the side surface of the support portion 13A of the sliding body 13. By pushing along the upper taper of the protrusion 13B, as shown in FIG. 3 (b), the position restricting protrusion 13B fits into the circular end face 6A to complete the automatic return slide switch.
[0034]
That is, in the automatic return type slide switch according to the present embodiment, the coil spring 6 that is most troublesome to handle when attaching the cover plate 15 to the case 11 is easily accommodated in the case 11 after the cover plate 15 is attached. It is something that can be done.
[0035]
The coil spring 6 can be more smoothly inserted into the case 11 by chamfering at least the lower surface on the center side and the upper surface on the end side of the periphery of the long hole 15A of the cover plate 15. Is.
[0036]
(Embodiment 2)
FIG. 4 is a sectional view of an automatic return slide switch according to the second embodiment of the present invention.
[0037]
In the present embodiment, in the configuration described in the first embodiment, a short cut-and-raised portion 16B is provided from the cover plate 16 slightly inside the wall portion 11G on one short side of the case 11, and the coil spring 6 is provided. The upper surface 17C of the spring position regulating projection 17B on the side surface of the support portion 17A of the sliding body 17 has a stepped shape protruding from the lower surface 17D, and the coil spring 6 is interposed therebetween. By elastically contacting the parallel end faces of both ends of the coil spring 6, the upper side of the parallel end faces of both ends of the coil spring 6 is compressed more than the lower side, so that the intermediate portion 6 B bends downward as a whole of the coil spring 6. is there.
[0038]
As a result, when the automatic return type slide switch is operated, when the coil spring 6 is pressed and contracted by pressing the operating lever, the middle portion 6B of the coil spring 6 hits the periphery of the long hole 16A of the cover plate and the like, causing a feeling of crispness. There is nothing.
[0039]
【The invention's effect】
As described above, according to the present invention, in the automatic return type slide switch, only the coil spring for automatic return can be inserted into the case later, so that the assembly is easy and automatic assembly is possible. Since it can be arranged in the center, it is advantageous at the time of use, and even if the number of turns of the coil spring is increased, an advantageous effect that the feeling of operation is good is obtained because the feeling of flickering does not occur at the time of operation.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an automatic return slide switch according to a first embodiment of the present invention. FIG. 2 is a cutaway plan view of the same part. FIG. 3A is a sectional view for explaining the assembly method. FIG. 4 is a sectional view of an automatic return type slide switch according to a second embodiment of the present invention. FIG. 5 is an exploded perspective view of a conventional automatic return type slide switch. [Explanation of symbols]
4 Elastic movable contact piece 6 Coil spring 6A Circular end face 6B Intermediate part 11 Case 11A Partition material 11B First space chamber 11C Second space chamber 11D First side wall 11E Second side wall 11F Notch 11G, 11H Short side Wall portion 12A, 12B, 12C Connection terminal portion 12D, 12E, 12F Fixed contact 13, 17 Slider 13A, 17A Support portion 13B, 17B Position restricting projection 14, 18 Operation lever 15, 16 Cover plate 15A, 16A Long hole 16B Cut-and-raised part 17C Upper surface 17D Lower surface

Claims (2)

Divided into first and second space chambers by a partitioning material at the bottom, a plurality of fixed contacts are planted in a straight line in the second space chamber, and the connection terminals for each fixed contact are the bottom surfaces of the first space chambers. A box-shaped case with an open top surface that protrudes outwardly through the interior, and is arranged to be movable in the second space chamber along the arrangement direction of the plurality of fixed contacts. a sliding member having a support portion and a central portion that protrudes into the chamber together with the operation lever projecting outwardly of the case, is embraced in the lower surface of the sliding body, a short circuit in sliding contact between the plurality of fixed contacts an elastic movable contact piece is compressed housed between the wall portion of the one short side of the side surface and the case having a spring position regulating protrusion of the support portion projecting from the sliding member, the other short side of the sliding body a coil spring disposed in the first space chamber to press the wall, covering the Uni consists the case top cover plate attached to, the cover plate of the first space chamber of the upper surface portion to allow insertion of the coil spring from the outside of the long hole of the case is provided, a first gas chamber of the case A short cut-and-raised portion is provided from the lid plate slightly inward of the short side wall of the first and the upper part of the end face of the coil spring is brought into contact with the cut-and-raised portion, and the side surface of the support portion of the sliding body is The upper surface of the spring position restricting projection has a stepped shape that protrudes toward the wall of one short side of the case from the lower surface, and the parallel end surfaces of both ends of the coil spring are elastically contacted between them. An automatic return type slide switch in which an intermediate portion of the coil spring is bent and arranged on the bottom side of the case .   The spring position restriction of the support part in a state where the upper part of the protrusion for restricting the spring position of the support part protruding from the sliding body is tapered from the base to the tip, and the sliding body is in contact with the wall of the other short side in the case The automatic return type slide switch according to claim 1, wherein a long hole through which the coil spring can be inserted is provided in the lid plate from the position of the side surface having the projection for the case toward the center of the case.

Images