JPH067138U - Slide switch - Google Patents

Abstract

(57) [Summary] [Purpose] The movable contact piece and the fixed contact piece are brought into sliding contact with each other to perform cleaning, thereby improving the reliability of the connection and providing a detent mechanism separately from the movable contact piece. Simplify the shape of the piece and improve the yield. [Structure] The case cover 1 is provided with a cross-shaped knob hole 2 corresponding to the sliding direction of the knob on the plate surface. The knob 4 is provided with a cylindrical recess 4g from its bottom surface. On the bottom surface of the case body 5, a cross-shaped concave and convex portion 5a for detent,
The fixed contact piece 8 is formed. The movable contact piece 6 is attached to the bottom surface of the knob 4 at an angle of 45 ° with respect to the moving direction of the knob by inserting the engaging projection 12b of the feel bar through the insertion hole 6j and further engaging with the cylindrical recess 4g. . Coil spring 11
Is wound between the outer peripheral surface of the engaging projection 12b and the inner peripheral surface of the cylindrical recess 4g, whereby the knob 4 is pressed against the inner surface of the case cover 1, and the feel bar 12 is pressed onto the uneven portion 5a for detent. To be done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slide switch capable of sliding a knob in a cross shape in four directions, and particularly to improvement of connection reliability.

[0002]

[Prior art]

 This type of slide switch has the features that the switch is small and compact for the number of contact pieces, and that the knob moves in the cross direction, making it easy to visually grasp the neutral position of the knob. As a conventional example, the "switch mechanism" of Jitsuho Sho 60-4350 will be described.

In FIGS. 5 and 6, a case 1 is formed with a knob hole 2 having four guide hole portions 2a, 2b, 2c, 2d in a cross shape. Guide grooves 3 are formed in the inner peripheral portions of the guide hole portions 2a to 2d, respectively. A knob 4 is provided in the knob hole 2. The knob 4 is movable in each of the guide hole portions 2a to 2d through the engaging portion 4a engaged with each guide groove 3, and is normally in the neutral position at the center of the knob hole 2. positioned. The operating portion 4b of the knob 4 can move on the movable contact piece 6 on the circuit board 5 arranged in the case 1.

The movable contact piece 6 is fixed to the upper surface of the circuit board 5 at the back surface of the central portion thereof and faces the knob hole 2. At the center of the movable contact piece 6, there is formed a concave portion 7 for retaining the neutral position of the operating portion 4b of the knob 4, and the operating portion 4b is engaged with the concave portion 7 to It holds that position. The planar shape of the movable contact piece 6 corresponds to that of the knob hole 2 and has four contact piece portions 6a, 6b, 6c and 6d. The contact piece portion 6a extends along the guide hole portion 2a. Others are the same. The ends of the contact pieces 6a to 6d can be brought into contact with and separated from fixed contact pieces (also referred to as terminals) 8a to 8d provided on the upper surface of the circuit board 5. The contact pieces 6a to 6d are formed with click bending portions 6-1a to 6-1d for positioning the operating portion 4b of the knob 4 when the operating portion 4b is moved. One fixed contact piece 8a constitutes one switch together with the contact piece portion 6a. Others are the same.

Reference numeral 9 denotes a sealing plate that seals the knob hole 2. The sealing plate is held in a groove 1 a provided in the case 1 and is movable together with the knob 4. Next, the switch operation will be described. In the state of FIG. 6A, the operating portion 4b of the knob 4 is held in the recess 7 in the neutral position. When the knob 4 is moved to the right, the knob 4 moves to the guide hole 2c, and the operating portion 4b moves over the recess 7 and moves to the contact piece 6c as shown in FIG. 2B. The end portion is joined to the fixed contact piece 8c by the pressing force of the operating portion 4b, and the switch is closed. At this time, the operating portion 4b is positioned by the click bending portion 6-1c of the contact piece portion 6c.

[0006]

[Problems to be solved by the device]

 In the conventional slide switch, when the knob 4 is slid in the cross direction, one of the contact piece portions 6a to 6d of the cross-shaped movable contact piece 6 is pushed downward by the operating portion 4b and tilted, and the contact piece portion 6a. One of the fixed contact pieces 8a to 8d is brought into contact with the corresponding one of the fixed contact pieces 8a to 8d, and the connection structure between the switch contact pieces is a so-called seesaw structure. In such a seesaw-structured contact piece, since the contact piece portions 6a to 6d and the fixed contact pieces 8a to 8d hardly slide during switching connection, mechanical cleaning of the contact surface is not performed. However, over the years, these contact surfaces undergo chemical changes due to harmful substances in the air or get caught in dust, which reduces the reliability of the connection and shortens the service life.

Further, in the conventional slide switch, a detent (switching feeling) mechanism is configured by the shape of the operating portion 4b of the knob 4 and the bending shape of the click bending portions 6-1a to 6-1d of the movable contact piece 6. There is. If the movable contact piece 6 also has a detent function in addition to the original connection function, the bending of the contact piece is complicated and machining becomes difficult, resulting in low dimensional accuracy and poor yield. .

The present invention solves these drawbacks of the prior art, improves the reliability of the connection by allowing the movable contact piece and the fixed contact piece to be in sliding contact with each other, and constantly performing cleaning, and at the same time, the detent. The purpose is to improve the yield of the movable contact piece by providing the mechanism separately from the movable contact piece and giving the movable contact piece only the original connection function and simplifying its shape.

[0009]

[Means for Solving the Problems]

 The slide switch of the present invention comprises a case cover, a case body, a knob, a movable contact piece, a fixed contact piece, a touch rod, and a coil spring. The case cover has a cross-shaped knob hole corresponding to the four sliding directions of the knob on its upper surface.

The case body is made of synthetic resin, and is formed into a box shape having an open upper end. A cross-shaped detent concavo-convex portion is formed on the bottom surface of the case body so as to face the knob hole. To be done. The fixed contact piece is formed of a thin metal plate on the bottom surface of the case body, and includes a first to fourth contact piece corresponding to the sliding direction of the knob and a common contact piece corresponding to the neutral position of the knob. Become.

The knob is made of a synthetic resin material, and is housed in the case body and is elastically pressed against the inner surface of the case cover by the coil spring, and a square plate portion above the center of the upper surface of the square plate portion. And a leg piece integrally projecting below the peripheral portion of the inner surface of the square plate portion, the columnar portion for operation penetrating through the knob hole and the square plate portion. From the center of the inner surface of the column, a cylindrical recess is formed substantially coaxially with the columnar portion up to the middle of the length of the columnar portion.

The touch rod is made of a synthetic resin material, and is approximately coaxial with the columnar portion of the knob, and the columnar portion is disposed on the bottom surface of the case body, and the center of the upper end surface of the columnar portion is approximately the center. The engaging projection is integrally projecting further upward, penetrates the insertion hole of the movable contact piece and is engaged with the tubular recess of the knob, and the lower end of the columnar portion of the feel bar is for the detent. It can be engaged with the uneven portion.

The movable contact piece is integrally bent and extended outwardly and obliquely below both shoulders of the flat plate portion that is in contact with the bottom surface of the square plate portion below the knob columnar portion, and is opposed to each other. A pair of arm pieces is formed, and a sliding contact portion that elastically slides in contact with a fixed contact piece in the case body is formed at the extended end of the arm pieces, and the touch bar of the touch rod is approximately at the center of the flat plate portion. The insertion hole through which the engagement protrusion is inserted is formed.

The coil spring is wound between the outer peripheral surface of the engaging protrusion of the feel bar and the inner peripheral surface of the tubular recess of the knob, and the square plate of the knob is attached to the inner surface of the cover. The touch bar is pressed against the concavo-convex portion for detent in the case body. One of the first to fourth contact pieces of the fixed contact piece and the common contact piece are correspondingly slid in correspondence with the columnar portions of the knobs slid in the four side directions formed by the cross of the knob hole. Electrically connected via a movable contact piece.

It is desirable that the arm piece of the movable contact piece is attached at an angle of about 45 ° with respect to the sliding direction of the knob when viewed from above.

[0016]

【Example】

 Embodiments of the present invention are shown in FIGS. 1 to 3 in which parts corresponding to those in FIGS. The slide switch of the present invention comprises a case body 5, a case cover 1, a knob 4, a movable contact piece 6, a fixed contact piece 8, a coil spring 11, and a touch rod 12.

The case cover 1 is made of a synthetic resin material, has a cross-shaped knob hole 2 at the center of the upper surface thereof, and has a case body 5 which is located at both ends of two opposite edges of the upper surface. A U-shaped engaging portion 1b that engages with the joint protrusion 5b is integrally provided so as to protrude downward. The knob hole 2 is formed with four sides forming a cross, that is, corresponding to the front, rear, left, and right guide hole portions 2a to 2d.

The case main body 5 is made of a synthetic resin material and is formed into a box shape with an upper end open. The cross-shaped detent concavo-convex portion 5 a is formed on the bottom surface of the case main body in a cross shape of the knob hole 2. Is formed to face. Engagement protrusions 5b that engage with the engagement portions 1b of the case cover 1 are formed at both ends of the side surfaces of the case body 5 that face each other. The fixed contact piece 8 is formed of a thin metal plate on the bottom surface of the case body 5, and the fixed contact pieces 8-1 to 8-4 corresponding to the positions of the four knobs after sliding and the neutral position of the knob are respectively formed. And corresponding common fixed contact piece 8-C. Insert molding terminals 13-1 to 13-4 and 13-C extending from the respective fixed contact pieces are led out to the outside from the side wall of the case body 5.

The knob 4 is made of a synthetic resin material and is composed of a square plate portion 4d, a columnar portion 4e, and a plurality of leg pieces 4f. The square plate portion 4d is housed in the case body 5 and is elastically pressed by the coil spring 11 against the inner surface of the case cover 1. A columnar portion 4e for operation is integrally provided so as to project above the center of the upper surface of the square plate portion 4d, penetrates through the knob hole 2, and is led out to the outside. A plurality of leg pieces 4f are integrally projectingly provided below the corners of the inner surface of the square plate 4d. A cylindrical concave portion 4g is formed substantially coaxially with the columnar portion 4e up to the middle of the length of the columnar portion 4e, upward from the center of the inner surface of the square plate portion 4d.

The touch rod 12 is made of a synthetic resin material, and has a columnar portion 12a and an engaging protrusion 12b. The columnar portion 12a is disposed on the bottom surface in the case body 5 substantially coaxially with the knob columnar portion 4e. The engaging projection 12b is integrally provided so as to project above the center of the upper end surface of the columnar portion 12a, and is engaged with the tubular recess 4g of the knob. The lower end portion 12c of the columnar portion 12a is engaged with the detent uneven portion 5a formed on the bottom surface of the case 5.

The movable contact piece 6 is integrally bent and extended outwardly and obliquely below both shoulders of the flat plate portion 6e, which faces the bottom surface of the square plate portion 4d so as to face the columnar portion 4e of the knob. And a pair of arm pieces 6f. Sliding contact portions 6h, which are convexly curved downward, are formed at the extended ends of the arm pieces 6f so as to elastically make sliding contact with the fixed contact pieces 8 in the case body 5. An insertion hole 6j is formed substantially at the center of the flat plate portion 6e. The movable contact piece 6 can be attached to the bottom surface of the knob 4 by inserting the engaging projection 12b of the feel bar into the tubular recess 4g of the knob. The movable contact piece 6 is attached at an angle of about 45 ° with respect to the four side directions of the cross of the knob hole 2, that is, the knob moving directions 15a to 15d.

The coil spring 11 is wound between the outer peripheral surface of the engagement protrusion 12b of the feel bar 12 and the inner peripheral surface of the cylindrical recess 4g of the knob 4. The coil spring 11 presses the square plate portion 4 d of the knob 4 against the inner surface of the case cover 1 and the touch rod 12 against the concave and convex portion 5 a for content in the case body 5. As described above, the detent concave-convex portion 5a is formed in a cross shape on the bottom surface in the case body so as to face the cross-shaped knob hole 2 of the case cover 1. As shown in FIG. 1, the cross portion of the cross is formed as a square concave portion when viewed from above, and the lower end portion 12c (see FIG. 2C) of the feel bar 12 engages to form the neutral position of the slide switch. To do. As shown in FIG. 2A, the concavo-convex portion 5a for detent is raised from the lowest portion of the concave portion toward each side of the cross with a relatively steep slope to reach the top of the convex portion, and then is relatively gentle. It can be lowered on a slope.

In order to slide the knob 4 in the direction of the four sides of the cross of the knob hole 2, the feel bar 12 is pushed over the convex portion from the concave portion of the detent concave-convex portion 5 a against the biasing force of the coil spring 11. It is necessary to obtain a click feeling when the knob 4 is slid. The same applies when the knob 4 is returned to the neutral position. As shown in FIG. 3A, when the knob 4 is in the neutral position, the movable contact piece is at the position 6 in the drawing, and the sliding contact portions at both ends of the movable contact piece are in contact with the common fixed contact piece 8c. . When the knob is slid in the direction of the arrow 15a (15c), the movable contact piece 6 is slid to the position 6 '(6 ") in Fig. 3A, and is fixed in common with the fixed contact piece 8-1 (8-2). The knob 4 is electrically connected to the contact piece 8-C. When the knob 4 is slid in the direction of the arrow 15b (15d) of FIG. 3B from the neutral position, the movable contact piece 6 is moved to 6 '(6 ″) of FIG. The fixed contact piece 8-3 (8-4) is electrically slid to the common fixed contact piece 8-C.

Next, a method of manufacturing the case 5 will be briefly described with reference to FIG. Using a press die, a terminal (contact piece) material 17 such as a plate strip of silver plated on brass is punched into a shape shown in FIG. 4A continuously for each switch, and fixed contact pieces 8-1 to 8-4. , The common fixed contact piece 8-C and the external connection terminals 13-1 to 13-4, 13-C extended from the respective fixed contact pieces. The terminal material 17 is shifted by one switch by utilizing the feed hole 18, and a large number of contact pieces and terminals are formed in a chain.

These chain-shaped contact pieces and terminals are passed through a resin molding die, and insert molding is performed with a synthetic resin as shown by hatching in FIG. 4B, and the case body 5 is manufactured. Next, unnecessary portions of the terminal material as shown by hatching in FIG. 4C are cut, and the terminals led out from the case body 5 are bent to form the case body 5 shown in FIG. .

[0026]

[Effect of device]

 As described above, according to the present invention, by sliding the knob 4, the movable contact piece 6 is brought into sliding contact with the fixed contact piece 8 and mechanical cleaning is performed on each other, so that the connection reliability can be improved. . Further, in this invention, by forming the concavo-convex portion 5a for detent integrally on the bottom surface of the case body 5, the movable contact piece 6 does not need to have a detent function, so that the shape can be simplified and the yield can be improved. Can be improved.

In this invention, the movable contact piece 6 does not need the cross-shaped four contact piece portions as in the conventional example, but is composed of the pair of arm pieces 6h and the flat plate portion 6e. The amount of single-sided material used is small, which makes the switch economical. In this invention, when the movable contact piece is attached at an angle of 45 ° with respect to the sliding direction of the knob, the knob 4 is moved forward and backward even though a pair of arm pieces are used (conventionally, four pieces). Even if the movable contact piece 6 is slid in any of the left and right directions, the movable contact piece 6 is similarly slid on the fixed contact piece 8, that is, the sliding frictional force between the contact pieces is the same. The contact function in the sliding direction does not deteriorate quickly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

2A is a longitudinal sectional view of the embodiment of FIG. 1, FIG. 2B is a perspective view of the movable contact piece 6 of FIG. 2A, and FIG. 2C is a perspective view showing the shape of the lower end portion of the touch rod 12 of FIG.

FIG. 3 is a plan view of the case main body 5 of FIG. 1, and the position of the movable contact piece 6 when the knob 4 is slid back and forth or left and right is also shown by a dotted line.

FIG. 4 is a diagram showing a manufacturing process of the case body 5 of FIG.

FIG. 5 is a plan view of a conventional slide switch, and FIG.
FIG. 4A is a plan view of a movable contact piece used for the switch of FIG.

6A is an enlarged cross-sectional view taken along line CC of FIG. 5A, and FIG. 6B is an enlarged cross-sectional view showing a state where a knob is moved.

Claims (2)

[Scope of utility model registration request] 1. A slide switch comprising a case cover, a case body, a knob, a movable contact piece, a fixed contact piece, a touch rod and a coil spring, wherein the case cover is provided on an upper surface thereof. The case body has cross-shaped knob holes corresponding to the four sliding directions of the knob, the case body is made of synthetic resin, and the upper end is formed into an open box shape. The case body has a cross-shaped detent on the bottom surface. An uneven portion is formed to face the knob hole, the fixed contact piece is formed of a thin metal plate on the bottom surface of the case body, and the first to fourth contact pieces corresponding to the sliding direction of the knob are formed. , A common contact piece corresponding to the neutral position of the knob, the knob being made of a synthetic resin material, housed in the case body, and elastically attached to the inner surface of the case cover by the coil spring. A square plate portion to be pressed, a columnar portion for operation that integrally protrudes above the center of the upper surface of the square plate portion, and penetrates through the knob hole, and below the peripheral portion of the inner surface of the square plate portion. A cylindrical concave portion is formed substantially coaxially with the columnar portion up to the middle of the length of the columnar portion, which is composed of integrally formed leg pieces and extends upward from the center of the inner surface of the square plate portion. The touch rod is made of a synthetic resin material, and is approximately coaxial with the columnar portion of the knob, and the columnar portion disposed on the bottom surface of the case main body and the upper end surface of the columnar portion above the center. And a lower end portion of the columnar portion of the feeler rod, which is formed as an engaging projection that is integrally projected on the movable contact piece and penetrates through the insertion hole of the movable contact piece and is engaged with the tubular concave portion of the knob. And the movable contact piece is a flat plate portion that is in contact with the bottom surface of the square plate portion below the knob columnar portion. It consists of a pair of arm pieces that are bent and extended integrally obliquely downward from both shoulders of the flat plate part and that face each other, and the extended ends of these arm pieces elastically slidingly contact the fixed contact pieces in the case body. A sliding contact portion is formed, the insertion hole for inserting the engagement protrusion of the touch rod is formed in the approximate center of the flat plate portion, and the coil spring has an outer peripheral surface of the engagement protrusion of the touch rod,
It is wound between the inner peripheral surface of the tubular concave portion of the knob and presses the square plate portion of the knob against the inner surface of the cover and the touch rod against the concave and convex portion for detent in the case body. There is one of the first to fourth contact pieces of the fixed contact piece and the common contact piece corresponding to sliding the columnar portion of the knob in the four side directions formed by the cross of the knob hole. A slide switch, wherein the slide switch is electrically connected via the movable contact piece. 2. The slide switch according to claim 1, wherein the arm piece of the movable contact piece is attached at an angle of about 45 ° with respect to the sliding direction of the knob when viewed from above.