JPH0239301Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a push-slide switch, and is particularly an ultra-small push-slide switch used for surface mounting on printed circuit boards or for headphone stereos.

[Prior Art] To explain a conventional ultra-compact push slide switch, in Fig. 6, 1 is an insert base, 2 is a slider that is slidably inserted into the insert base 1, and 3 is attached to the bottom of the slider 2. 4 is an elastic body made of a coil spring that is elastically loaded between the insert base 1 and the slider 3, and 5 is a cover that presses the slider against the insert base 1 to accommodate it. Projections 2a, 2a formed on the sides
The grooves 1h and 1h formed on the inner surface of the left and right sides of the insert base 1, and the groove 2 formed on the bottom of the insert base 1
b engage with the guide protrusions 1d, and are slidably fixed by the cover 5 with the elastic body 4 interposed between the protrusions 1c on the inner surface of the insert base 1, and inside the slider 2. The contact pieces 3, 3 are housed and slidably contact the contact plates 1e, 1f. A hole 5a formed in an ear portion 5b of the cover 5 engages with a protrusion 1b on the outer surface of the insert base 1. 19 is contact plate 1
This is a terminal portion electrically connected to e and 1f. As shown in FIG. 7, the contact piece 3 is a conductor wire of a predetermined diameter bent into a fork shape, and the intersection portion 3b overlaps and has a thickness 2D that is twice the wire diameter D. I was getting used to it.

[Problems to be solved by the invention] According to the conventional ultra-small push-slide switch described above, as shown in FIG. 7C, the thickness dimension of the intersection portion 3b of the contact piece 3 is 2D; Further, as shown in FIG. 7B, the lower part of the contact plate 1e and 1f, on which the contact piece 3 approaches and separates, is increased in width accordingly. There is a need, therefore,
The width W of the insert base 1 that accommodates the pair of contact pieces 3 is necessarily 4D plus α (α is the width of the contact plates 1e and 1f, the wall thickness of the left and right side walls of the insert base 1, and the guide protrusion). The dimension is the sum of the width dimensions of the strips 1d) or more.

By the way, miniaturization of the ultra-small push slide switch as much as possible is welcomed, and when considering the above conventional example from that point of view, the contact piece 3 has a size twice the wire diameter D at the intersection 3b, The fact that it greatly influences the width dimension W of the insert base 1 can be said to mean that there is still room for improvement.

In view of the above-mentioned circumstances, the present invention was developed with the aim of further downsizing the current ultra-compact push-slide switch.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is a box-like body with one end side open, a groove is formed on the opposing inner surface, and a groove is formed on the inner bottom. an insert base in which a guide protrusion parallel to the groove is formed, a pair of spaced apart contact plates are laid down, and a part of the contact plate projects outward to form a terminal part; A protrusion that engages with the groove, a concave groove that engages with the guide protrusion, grooves formed on the left and right sides of the concave groove, and a portion of the conductor at the intersection with the groove is flattened. a slider formed by fitting a molded and elastic fork-shaped contact piece and pressed in the longitudinal direction of the guide protrusion; and a slider that cannot be detached from the insert base;
The present invention constitutes an ultra-compact push-slide switch consisting of a cover that is movably attached within a predetermined length.

[Operation] According to the present invention, when the slider is pushed into the insert base, the slider moves inward of the insert base against the biasing force, thereby bringing the contact pieces into bridging contact with the spaced apart contact plates. This enables electrical continuity between the terminals protruding from the sides. Then, when you stop pressing the slider,
The slider is urged outward from the insert base by the force of the elastic body and returns to its original state. For example, the slider stops at a certain position without coming off due to the engagement of the elongated hole with the stopper of the cover.

Since the contact piece is made of a fork-shaped conducting wire whose intersection part is formed flat, the thickness of the intersection part can be made approximately the same as the diameter of the conducting wire, which makes it possible to bury the contact piece. This makes it possible to reduce the width of the groove to one-half of the planned width, which in turn makes it possible to miniaturize the slider and the insert base that engages with it.

[Embodiments] The present invention will be described below with reference to illustrated embodiments.

Fig. 1 is an exploded perspective view, in which 1 is an insert base, 2 is a slider that is slidably inserted into the insert base 1, 3 is a contact piece attached to the bottom of the slider 2, and 4 is the insert base 1.
and the slider 3. 5 is a cover that presses the slider 2 against the insert base 1 and stores it therein.

The insert base 1 consists of a rectangular box with an open top surface and one side of the short side, and a bottom extension 1a extending outward on the open side.
are provided, and a protrusion 1 is provided on each side of the long side.
b is provided, and an elastic body 4 is provided on the inner surface of the shorter side.
A protrusion 1c for locking is provided, and a guide protrusion 1d is provided in the longitudinal direction on the inner bottom surface. A pair of contact plates 1e and 1f are integrally embedded with the insert base 1 at the front and rear of the bottom of the groove, which is divided into left and right by the guide protrusion 1d, and some of them extend outward from the insert base 1. The terminal portion 1g is formed by protruding horizontally. In addition, grooves 1h are formed on the inner surface of the long side of the insert base 1, and as shown in FIGS. 3 and 4, a protrusion 1i to be inserted into the printed circuit board is provided on the outer side of the bottom. ing.

The slider 2 consists of a block that is housed inside the insert base 1 so as to be slidable in the longitudinal direction, and a protrusion 2a that engages with the groove 1h of the insert base 1 is formed on the long side surface, and a protrusion 2a that engages with the groove 1h of the insert base 1 is formed on the bottom surface. is a concave groove 2b that engages with the protrusion 1d of the insert base 1.
is formed. As shown in FIGS. 3 and 4, on the bottom surface of the slider 2, grooves 2c, 2c for embedding and fixing the contact pieces 3, 3 are parallel to each other in the longitudinal direction on both sides separated by the groove 2b. It is drilled in. Since a biasing force is applied to the slider 2 by the elastic body 4 loaded between it and the insert base 1, an elongated hole 2d is formed in the upper surface in the longitudinal direction in order to engage with the cover 5 and prevent it from coming off. It is formed.

As shown in FIG. 5, the contact piece 3 is made by bending a predetermined conductive wire 3a into a fork shape and flattening the intersection portions 3b so that the thickness becomes half the diameter of the conductive wire 3a. Molded. Therefore, the intersection 3 has the same size as the diameter of the conducting wire 3a, as shown in FIGS. 5B and 5C. For this reason, the conductor 3a
If you simply overlap them, the thickness of the intersection 3b will be the same as the conductor 3.
a, the width of the groove 2c of the slider 2 into which it is fitted increases, and therefore the lateral (short side) dimensions of the slider 2 and the insert base 1 can be prevented from increasing.

The cover 5 covers the open upper surface of the insert base 1 into which the slider 2 is inserted, and is made of a metal plate such as stainless steel.
The slider 2 has an ear portion 5b consisting of a rising portion with a hole 5a that engages with the protrusion portion 1b of the slider 2.
A stopper 5c consisting of a rising portion that prevents the
has.

Note that the push-slide switch described above is extremely small. Incidentally, the short dimension of the insert base 1 is 4.5 mm, the long dimension is 6.0 mm, and the height dimension is 2.9 mm. Further, the diameter of the conducting wire 2a is 0.3 mm.

By assembling the above-mentioned parts into one body and configuring it as shown in FIGS. 2 to 4, an ultra-compact push-slide switch is completed. The slider 2 is urged by the elastic body 4 to move toward the open short side of the insert base 1, and at this time, the contact pieces 3, 3 each move toward one contact plate 1f side and are normally open. Configure the switch. Therefore, when the slider 2 is pushed into the insert base 1, the slider 2 moves inward of the insert base 1 against the force of the elastic body 4, thereby causing the contact pieces 3, 3 to move toward the spaced apart contact plate 1e. , 1f, respectively, to make contact and conduction, and protrude from the side of the terminal 1.
Electrical continuity between g and 1g becomes possible. Then, when the pressing of the slider 2 is stopped, the slider 2 is urged outward from the insert base 1 by the force of the elastic body 4 and returns to its original state. The slider 2 is stopped at a predetermined part without coming off due to the engagement between the elongated hole 2d and the stopper 5c of the cover 5.

[Effects of the invention] According to the invention described above, the contact piece, which is the main part of the switch, has a forked contact piece in which a part of the conductive wire at the intersection is flattened and crushed into the groove of the slider. Since the contact pieces are fitted together, the thickness of the intersection can be made the same as the diameter of the conductor, and the width of the groove and slider in which this contact piece is buried can be reduced by at least the diameter of the conductor. Therefore, the width of the insert base can be similarly shortened, and when two or more contact pieces are arranged in parallel, the width can be shortened by multiple times the diameter of the conductor. It has the effect of

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view, Fig. 2 is a plan view, Fig. 3 is a central vertical cross-sectional view, and Fig. 4 is a central cross-sectional view.
5A, B, and C are a front view, a side view, and a cross-sectional view taken along line X-X of the contact piece; FIG. 6 is an exploded perspective view of the conventional example;
FIGS. 7A, B, and C are a front view, a side view, and a XX sectional view of the main parts. 1...Insert base, 1d...Guide protrusion, 1g...Terminal section, 1h, 2b...Concave groove, 2...
...Slider, 2a... Protrusion, 2d... Long hole, 3
...Contact piece, 3b...Intersection, 4...Elastic body, 5
...Cover, 5c...Stoppa.

Claims (1)

[Claims for Utility Model Registration] A box-shaped body with one side open, a groove formed on the opposing inner surface, a guide protrusion parallel to the groove formed on the inner bottom, and , an insert base formed by laying a pair of spaced apart contact plates and forming a terminal portion by protruding a part of the contact plates to the outside; a protrusion that engages with the groove; and the guide protrusion. a concave groove that engages with the concave groove, a groove formed on the left and right sides of the concave groove, and a part of the conductive wire at the intersection part is flattened and crushed into the groove to form an elastic fork-shaped contact piece. a slider that is fitted and is pressed in the longitudinal direction of the guide protrusion; and a slider that cannot be detached from the insert base;
An ultra-compact push slide switch comprising: a cover that is movable within a predetermined length;