JPH0543439U - Rotary witch - Google Patents

Abstract

(57) [Abstract] [Purpose] It is not necessary to form terminals or the like for key switches on a body or a substrate, which facilitates assembly and achieves miniaturization as a whole. [Structure] Body 100 with through hole 130 in the center
A substrate 200 having an opening 230 corresponding to the through hole 130 in the center, a rotor 300 having an opening 310 corresponding to the through hole 130 in the center, and a rotor 300 attached to the rotor 300 and exposed to the substrate 200. The brush 500 that slides on the switch pattern 210 and the through hole 130
Key switch 60 housed in the recess
0, the key top 700 inserted into the through hole 130 from the back side of the body 100, and the key switch housed in the recess 120.
The back cover 800 that secures the 600 and the board 200 that is stacked on the housing 120 provided on the front side of the body 100
And a frame 400 for fixing the rotor 300 to the body 100, and a protrusion to prevent the key top 700 from coming off at the base side.
710, the concave portion is provided with groove portions corresponding to the protrusions, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary switch, and more particularly, to a rotary switch having a key switch for pressing.

[0002]

[Prior Art]

 A rotary switch with a built-in key switch requires a switch pattern for the rotary switch and a terminal for the key switch. The body is insert-molded with the switch pattern for the rotary switch and the terminal for the key switch, and the body is insert-molded with only the switch pattern for the rotary switch. For example, the switch pattern was connected with a half pad.

[0003]

[Problems to be solved by the device]

 However, in either method, the terminals for the key switch had to be specially incorporated in the body, the board, etc., which was troublesome and the productivity was poor. Further, since the terminals for the key switch must be incorporated, there is a problem that the body, the board, etc. become large.

[0004]

[Means for Solving the Problems]

 The rotary switch according to the present invention was devised in view of the above circumstances, and by providing an existing key switch in the body to improve productivity, a rotary switch that can be made compact as a whole is provided. The purpose is to do.

[0005]

【Example】

 1 is an exploded perspective view of a rotary switch according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of this rotary switch, and FIG. 3 is a schematic sectional view showing the relationship between a key top and a key switch. 4 is a schematic sectional view of the body.

The rotary switch according to the present embodiment includes a body 100 having a through hole 130 in the center, a substrate 200 having an opening 230 corresponding to the through hole 130 in the center, and the through hole in the center. A rotor 300 having an opening 10 corresponding to 130, a brush 500 attached to the rotor 300 and sliding on the switch pattern 210 exposed on the substrate 200, and a through hole 130 from the back side of the body 100. The key switch 600 housed in the recess 170 provided in series, the key top 700 inserted into the through hole 130 from the back side of the body 100, and the key switch 600 housed in the recess 170 are fixed. It has a back cover 800, a frame 400 for fixing the substrate 200 and the rotor 300, which are housed in the housing section 120 provided on the front surface side of the body 100, in an overlapping manner to the body 100.

The body 100 is formed in a square shape in plan view, and walls 110 are provided on three sides thereof. The inside of the wall 110 serves as a housing portion 120. A through hole 130 is opened in the center of the housing 120, that is, in the center of the body 100, and a cylinder 140 having a height substantially the same as the height of the wall 110 is erected around the through hole 130. ing. Further, the substrate holding portion 150 having the same height is provided around the cylinder 140 and inside the wall 110. Further, screw holes 160 for mounting are provided at four corners of the body 100.

Further, on the back side of the body 100, as shown in FIG. 2, there is provided a recess 170 connected to the through hole 130. The recess 170 is a portion in which the key switch 600 described later is housed, and is provided corresponding to the size and shape of the key switch 600. Temporary locking claws (not shown) for temporarily locking the key switch 600 are formed on the two side walls of the recess 170 opposite to each other. Further, two groove portions 175 are formed on the side wall portion other than the side wall portion on which the temporary fixing claw is provided. The groove portion 175 is a portion into which a protrusion 710 of the key top 700 described later is fitted.

The substrate 200 is accommodated in the accommodating portion 120 of the body 100, and has a substantially hooked shape as a whole. A predetermined switch pattern 210 is exposed on the surface of the round portion, and a portion extended from this switch pattern 210 projects as a terminal 220 from the base plate 200 and is bent by about 90 °. Further, an opening 230 into which the cylinder 140 is fitted is formed in the center of the substrate 200. Therefore, when the board 200 is housed in the housing portion 120 of the body 100, the board 200 is held by the board holding portion 150, and the terminals 220 are led out from the portion without the wall 110. Therefore, the board 200 is held by the body 100 in a non-rotatable state. Further, on the surface of the substrate 200, a locking portion 240 for locking the spring 900 is provided.

Since the rotor 300 having a circular shape in plan view is stacked and placed on the substrate 200, an opening 310 corresponding to the cylinder 140 is formed in the center thereof, and the periphery of the opening 310 is defined. A knob portion 320 having a substantially C-shape is formed on the. When the rotor 300 is placed on the substrate 200 accommodated in the accommodating portion 120, only the knob portion 320 is set to be higher than the wall 110.

A spring 900 is set on the back side of the rotor 300. The spring 900 is for automatically returning the rotor 300 to the middle point when the external force applied to the rotor 300 disappears, and its end is locked to the locking portion 240 of the substrate 200. A substantially fork-shaped brush 500 is attached to the back side of the rotor 300. When the rotor 300 is rotated, the brush 500 slides on the switch pattern 210 of the substrate 200. It has become.

The substrate 200 and the rotor 300 accommodated in the accommodating portion 120 of the body 100 are attached by a frame 400 so as not to come off the body 100. The frame 400 is formed by bending a single metal plate, and a circular hole 410 corresponding to the knob portion 230 of the rotor 300 is formed in the center thereof. In addition, a locking portion 420 corresponding to the locking claw 180 formed on the outer surface of the wall 110 of the body 100 and a claw 430 that rotates to the back side of the body 100 are formed on the side.

The key switch 600 is an existing one in which a snap plate 610, which is a movable contact piece, comes into contact with a fixed contact piece (not shown) only when pressed, and four terminals 620 are provided. The rod-shaped key top 700 for pressing the key switch 600 is set such that, when the key top 700 is fitted into the through hole 130, the tip end thereof is located higher than the knob portion 320 of the rotor 300. Further, at the base of the key top 700, that is, on the side close to the key switch 600, two protrusions 710 that fit into the groove portions 175 project laterally. The protrusion 710 is provided to prevent the keytop 700 inserted into the through hole 130 from coming off and to prevent the keytop 700 from rotating. Further, at the base of the key top 700, a hump 720 for contacting the snap plate 610 of the key switch 600 is provided.

The key switch 600 housed in the recess 170 is fixed to the body 100 by the back cover 800. The back cover 800 has four square holes 810 for the terminals 620 of the key switch 600 and four small holes 820 for attaching the back cover 800 to the body 100. It should be noted that four bosses 190 corresponding to the small holes 82 0 are provided on the back surface side of the body 100.

Next, the procedure for assembling the rotary switch composed of the above-mentioned components will be described. First, the key top 700 is inserted into the through hole 130 from the recess 170 of the body 100. At this time, make sure that the protrusion 710 of the key top 700 fits into the groove 175. Next, when the key switch 600 is fitted in the recess 170, the key switch 60 0 is temporarily fixed in the recess 170 by the temporary fixing claw 630. On the inner wall of the recess 170, a slit groove (not shown) corresponding to the temporary fixing claw 630 is provided. Attach the back cover 800 to the back side of the body 100 by welding, etc., and fix the key switch 600 in the recess 170. Next, the substrate 200 is housed in the housing portion 120 of the body 100, and the rotor 300 is placed thereon. At this time, the cylinder 140 is fitted into the opening 230 of the substrate 200 and the opening 310 of the rotor 300, and moreover, the end of the spring 900 is locked to the locking portion 240 of the substrate 200. Note that the brush 500 is preliminarily attached to the back surface of the rotor 300. Attach the frame 400 to the body 100 in this state so that the board 200 and the rotor 300 do not come off. At this time, the knob portion 320 of the rotor 300 is fitted in the round hole 410. This completes the assembly of the rotary switch.

The rotary switch having the above-described structure is used as a general rotary switch by rotating the rotor 300, and is used as the key switch 600 by pressing the key top 700. Although the rotor 300 is configured to automatically return to the middle point by the spring 900 in the above-described embodiment, it may be used as a normal rotary rotary switch without providing the spring 900. Is also possible. In this case, needless to say, it is not necessary to provide the locking portion 240 of the substrate 200.

[0017]

[Effect of the device]

 The rotary switch according to the present invention uses an existing key switch, and since the existing key switch is fitted into the recess provided on the back side of the body, the terminals for the key switch are not It need not be formed on the body or substrate. As a result, the assembly is easy and the overall size can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a rotary switch according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of this rotary switch.

FIG. 3 is a schematic sectional view showing a relationship between a key top and a key switch.

FIG. 4 is a schematic sectional view of a body.

[Explanation of symbols]

 100 Body 120 Housing 130 Through Hole 170 Recess 175 Groove 200 Board 210 Switch Pattern 230 (Board) Opening 300 Rotor 310 (Rotor) Opening 400 Frame 500 Brush 600 Key Switch 700 Key Top 710 Protrusion 800 Back Cover

Claims (1)

[Scope of utility model registration request] 1. A body having a through hole in the center, a substrate having an opening corresponding to the through hole in the center, and a rotor having an opening corresponding to the through hole in the center.
A brush that is attached to this rotor and slides on the switch pattern exposed on the substrate, a key switch that is housed in a recess provided in a continuous line from the back side of the body, and a back side of the body. A key top to be inserted into the through hole from the above, a back cover for fixing the key switch housed in the recess, a substrate and a rotor that are housed in an overlapping manner in a housing provided on the front surface side of the body in the body. The key top is provided with a fixing frame, a retaining protrusion is provided on the root side of the key top, and a groove portion corresponding to the protrusion is provided in the recessed portion. A rotary switch characterized by