JPH017954Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a rotary drive slide switch in which the sliding body moves linearly when the rotary operation shaft is rotated to change the switch.
The purpose of this is to prevent rattling of the sliding member, thereby allowing stable switching, and to provide a compact device that is easy to assemble.

The conventional rotary drive slide switch
As shown in the figure, a movable contact piece 55 that comes into sliding contact with the fixed terminal 51 is housed in a recess 54 provided in the abdomen in a frame 53 to which an insulating substrate 52 on which a plurality of fixed terminals 51 are implanted is attached, and one end A sliding body 57 having a protruding cam portion 56 is slidably inserted into the frame body 53, a front side plate 60 is attached to the front side of the frame body 53, and a rotation operation shaft is supported by a bearing 61 fixed to the front side plate 60. A cylindrical rotating cam 64 with a cam ridge 63 for moderation is attached to the rear end of the cam 62, and a steel ball 65 is attached to a holding part provided on the front plate 60 as shown in FIGS. 6 and 7. is inserted, and the steel ball 65 is brought into elastic contact with the cam crest 63 by a plate spring 67 whose both ends are locked in locking portions 66 provided on the side surface of the frame body 53 to form a moderating mechanism, and
A plurality of protrusions 68 are provided radially on the circumference of the rotating cam 64 (see FIG. 8), and each protrusion 68
A plurality of cam grooves 70 are formed in the cam portion 56 of the sliding body 57 (see FIG. 9) corresponding to the rotary operation shaft 6.
2, when the rotary cam 64 is rotated, each protrusion 68 sequentially engages with the corresponding cam groove 70 for each step of the moderation mechanism and presses the side wall of the cam groove 70, thereby causing the sliding body 5 to rotate.
There is one in which the switch 7 is moved in either the left or right direction as shown in FIG.

However, the rotary drive slide switch configured as described above has a cam groove 70 that engages with a protrusion 68 of a rotary cam 64 attached to a rotary operation shaft 62.
Since the cam portion 56 is provided on the cam portion 56 that projects from one end of the sliding body 57, there is a drawback that the lengthwise dimension becomes large. Further, the movement of the sliding body 57 is caused by the rotation of the rotary operation shaft 62, which causes the protrusion 6 of the rotary cam 64 to move.
8 is performed by pressing the side wall of the cam groove 70, a force is applied to one end of the sliding body 57 in a direction substantially perpendicular to the direction of movement, so that the sliding body 57 is displaced left and right. As a result, the movable contact piece 55 housed in the recess 54 of the sliding body 57 connects to the fixed terminal 5.
There were problems such as deformation due to being strongly pressed in only one direction, making it impossible to obtain a stable low contact state.

The present invention was devised in view of the above-mentioned drawbacks, and one embodiment of the present invention will be described below with reference to the drawings.
The frame body is formed into a box shape by punching and bending a metal plate.The front plate 2 of the frame body 1 has a shaft insertion hole 3, and the top surface has a stopper piece 4 that protrudes inward and is bent inward at approximately right angles. A support piece 6 is provided by bending to form a hole 5 facing the shaft insertion hole 3, and each of the side plates 7, 7 has a mounting protrusion 8 for attaching a board to be described later and a case for a moderation member to be described later. A notch 9 for attachment is formed. Reference numeral 10 denotes a rotary operation shaft formed from a metal rod, and the rotary operation shaft 10 includes an operation portion 11, an insertion portion 12 having a non-circular cross section, and a thin shaft portion 13 at the rear end.
It consists of

Reference numeral 15 denotes a rotary cam member molded from synthetic resin, and the rotary cam member 15 has a non-circular through hole 16 through which the insertion portion 12 of the rotary operation shaft 10 is inserted, and a plurality of protrusions 17 spirally arranged on the outer periphery. ... and a set of protrusions 18, 18 for attaching a moderation plate, which will be described later. Reference numeral 20 denotes a sliding body made of synthetic resin, and the sliding body 20 is provided with a curved surface 21 on the back surface that coincides with the outer circumference of the rotary cam member 15.
1 is formed with a cam groove 22 in which the plurality of projections 17 sequentially engage. A recess 23 for housing the movable contact pieces 24 is provided in the abdomen of the sliding body 20. Reference numeral 26 denotes a moderation plate having moderation projections 27 arranged around the circumference, and the moderation plate 26 has a hole 28 through which the rotary operation shaft 10 is inserted, and a notch 29 in which the protrusions 18, 18 of the rotary cam member 15 are located. There are 29. Reference numeral 30 denotes a moderation member case molded from synthetic resin, and the moderation member case 30 has a housing portion 31 for storing a ball 36 and a coil spring 37, and has protrusions 32, 32 for mounting and positioning on the outer periphery. and mounting piece 33
and. Coil spring 37 of the storage section 31
The dimensions of the insertion opening 34 on the side into which the ball 36 is inserted are slightly smaller than the outer diameter of the ball 36. 40 is an insulating substrate on which a plurality of fixed terminals 41 are implanted. 43 is a push nut with a hole 44 in the center and a notch formed on the circumference of the hole 44, and the inner diameter of the hole 44 of the push nut 43 is larger than the outer diameter of the thin shaft portion 13 of the rotary operation shaft 10. It's getting a little smaller.

Next, to explain the assembly of the rotary drive slide switch of the present invention, first, the rotary cam member 15
A moderation plate 26 is attached to the frame body 1 to form an integral body.
The rotation operation shaft 10 is inserted from the front side plate 2 side, and the insertion part 12 of the rotation operation shaft 10 is inserted into the moderation plate 26.
The rotary cam is inserted into the hole 28 of the rotary cam member 15 and the through hole 16 of the rotary cam member 15, the thin shaft portion 13 at the rear end is inserted into the hole 5 of the support piece 6, and the push nut 43 is press-fitted to the frame body 1. The member 15 is rotatably attached.

Next, the coil spring 37 is first inserted into the housing 31 through the insertion opening 34 of the moderation member case 30, and then the ball 36 is pushed in as shown in FIG. Since the dimensions of the insertion opening 34 are smaller than the outer diameter of the ball 36, the ball 36 stored in the moderation member case 30 does not come out, and is always urged upward in FIG. 2C by the action of the coil spring 37. has been done. The moderation member consisting of the moderation member case 30, the coil spring 37, and the ball 36 is attached to the frame 1 using the protrusions 32 and 36 as shown in FIG.
32 into the notches 9, 9, and the ball 36 locks into the moderation protrusion 27 of the moderation plate 26,
27 (see Figure 4).

Next, the sliding body 20 holding the movable contact pieces 24 in the recess 23 is placed on the insulating substrate 40 on which a plurality of fixed terminals 41 are implanted, and each movable contact piece 24 has a corresponding fixed terminal 41. Try to hold it in place.

Next, the insulating substrate 40, the sliding body 20, and the fixed terminal 4
1 and the movable contact piece 24 is inserted from below the frame 1, the protrusion 17 of the rotary cam member 15 is positioned in the cam groove 22 of the sliding body 20, and the rotary cam member 15 is inserted into the curved surface 21. abut the outer periphery of the The assembly is then completed by fixing the insulating substrate 40 to the frame 1 by tightening the mounting projections 8 of the frame 1.

Next, the operation of the rotary drive slide switch having the above structure will be explained with reference to FIGS.
17 is engaged with the cam groove 22 (see Fig. 5A), when the rotary operation shaft 10 is turned clockwise, the moderation plate 26 and the rotary cam member 15 rotate, and the moderation plate 26 is rotated. The moderation projection 27 moves the ball 36 against the biasing force of the coil spring 37, and the ball 36
moves over the moderation projection 27 and advances by one mode, and at the same time the rotary cam member 15 rotates. The protrusion 17 that engages with the cam groove 22 of the sliding body 20 changes, and the protrusion 17
The sliding body 20 moves in the direction of arrow A due to the engagement relationship between the cam groove 22 and the cam groove 22 . At this time, the movable contact pieces 24 housed in the sliding body 20 move together with the sliding body 20, and the fixed terminal 41 that contacts and conducts with it changes, thereby switching the switch. Furthermore, the rotation operation shaft 10
By rotating the switch one degree at a time, the switches can be changed sequentially in the same way. The frame 1 is attached to the protrusion 27 of the moderation plate 26.
The stopper piece 4 comes into contact with the stopper piece 4 to act as a stopper (see Fig. 4).

As mentioned above, the rotary drive slide switch of the present invention has a cam groove formed on the curved surface of the back surface of the sliding member, and a plurality of protrusions spirally provided on the outer periphery of the rotating cam member are positioned within the cam groove and the switch is curved. The outer periphery of the rotating cam member is aligned with the surface, and when the sliding member is driven, the sliding member is guided by the rotating cam member, and the sliding member moves straight without being deviated from side to side. Contact and switching between the movable contact piece and the fixed terminal is reliably performed in a stable state.
Further, since the rotary cam member is disposed above the fixed terminal row, significant practical effects such as being able to reduce the size of the sliding body in the moving direction can be achieved.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, Figure 1 is an exploded perspective view of a rotary drive slide switch, Figure 2 A, B, and C are diagrams explaining the assembly of the moderation member, and Figure 3. 4 is a perspective view illustrating the attachment of the moderation member to the frame 1, FIG. 4 is a cross-sectional side view of main parts, and FIG.
Figures A, B, and C are perspective views illustrating the operating state of the rotary drive slide switch of the present invention. 6 to 9 show a conventional rotary drive slide switch, FIGS. 6 and 7 are sectional side views of main parts, FIG. 8 is a front view showing the rotating cam 64, and FIG. 9 is a sliding body 57. FIG. 1...Frame body, 2...Front plate, 3...Shaft insertion hole,
4... Stopper piece, 5... Hole, 6... Support piece,
7... Side plate, 8... Mounting protrusion, 9... Notch,
10...Rotary operation shaft, 11...Operation unit, 12...
Insertion part, 13... Thin shaft part, 15... Rotating cam member, 16... Through hole, 17... Protrusion, 18... Projection piece, 20... Sliding body, 21... Curved part, 22...
Cam groove, 23... recess, 24... movable contact piece, 26
...Moderation plate, 27...Moderation protrusion, 28...Hole,
29... Notch, 30... Case for moderation member, 3
1...Storage part, 32...Protrusion, 33...Mounting piece,
36...Ball, 37...Coil spring, 40...
Insulating board, 41... fixed terminal, 43... push nut, 44... hole.

Claims (1)

[Scope of utility model registration request] A substantially cylindrical rotating cam member is attached to the rotating operation shaft, a plurality of protrusions are spirally formed on the outer periphery of the rotating cam member, and a cam groove in which the plurality of protrusions sequentially engage is formed on the back surface of the sliding body. A movable contact piece is housed in the abdomen of the sliding body, the movable contact piece slides on a fixed terminal implanted in an insulating substrate, and the rotary cam member is positioned above the fixed terminal row. In the rotary drive slide switch, the back surface of the sliding body is formed into a curved surface that coincides with the cylindrical outer periphery of the rotating cam member excluding the protrusion, and the outer periphery of the rotating cam member is positioned on the curved surface. . A rotary drive slide switch, wherein the sliding member is guided by the rotating cam member when the sliding member is driven.