JPS6331312Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a rotary switch.

In recent years, electronic tuning reception methods have developed, and the reception method that tunes a channel by counting the output of a pulse generator that generates up or down pulses, converting it from D to A, and supplying the output as a tuning voltage to a variable capacitance diode. There is a method. In this case, the electric circuit (1) maintains a specific frequency, (2) selects a higher frequency broadcast (here referred to as the up side), and (3) selects a lower frequency broadcast (here the down side). It is necessary to deal with three actions (referred to as side). Normally, these three operations are performed by appropriately switching the functions of the electric circuit using a three-step switch as shown in FIG. That is, when the movable piece 1 of the switch is in the neutral position, the output terminal 2 of the switch is not connected to any contact and is turned off, resulting in the state of (1) above, and then switches to the contact of voltage V ₁ . As a result, the state of (2) above on the up side is reached,
Moreover, by switching to the contact of voltage V ₂ , the above state (3) on the down side is achieved.

Conventionally, this type of switch has used a normal manual 3-step rotary switch, but as the switch becomes smaller, the amount of movement of the movable piece 1 becomes smaller, so the situation from (2) above to (1) When returning to the state of (3), it often goes too far and ends up in state (3), so it is desired to improve this, and it is also easier to operate in the case of radios that are tuned while driving, such as car radios. There have been requests for something that can be done.

The present invention has been made to meet such demands, and embodiments of the present invention will be described below with reference to the drawings. Figures 2 to 5 relate to one embodiment; Figure 2A is a side view, Figure 2B is a front view, Figure 3 is a side sectional view, and Figure 4 shows the main components of one part after being disassembled. A perspective view showing the parts, and FIG. 5 is an explanatory diagram of the operation with a portion cut away as seen from the line XX in FIG. 3.

In FIGS. 2 to 5, reference numeral 5 denotes a rectangular insulating substrate with a round hole 6 in the center, and a notch 5 forming an arcuate edge 7 concentric with the round hole 6 on some of its two long sides. A notch is provided on the rear surface of the substrate 5 (the left direction in FIG. 3 is referred to as the rear direction), and a circular conductive common contact 8 is placed concentrically with the round hole 6 on one short side of the substrate 5. The common terminal 9 is made to protrude and is fixed, and electrical conduction is made, and short arc-shaped conductive fixed contacts 10 and 11 concentric with the common terminal 8 are arranged on the outside of the common contact 8, separated from each other by an insulating off part 12. External terminals 13 and 1 are fixed and protruded from the other short sides of the board 5, respectively.
4 is conductive.

The case 20 made of an insulator that comes into contact with the rear surface of the board 5 is a substantially rectangular cylinder with openings in the front and rear, and its outer shape is such that the longitudinal dimension of the board 5 avoids the fixed portions of the terminals 9, 13, and 14 from both ends thereof. Cylindrical portions 21, 21' having the same outer diameter as the arcuate edge 7 of the substrate 5, and banks 22, 2 integrally formed by sandwiching the same in the longitudinal direction.
A shelf 23 is provided between the openings of the cylindrical parts 21 and 21' to divide the interior of the cylinder into a front chamber A and a rear chamber B. A bearing hole 24 is drilled, and a fifth hole is placed in the front chamber A.
As shown in the figure, a stop protrusion 28 is provided, and a positioning protrusion 2 is provided on the rear surface of the bank 22, 22'.
7, 27'... are provided protrudingly. Case 20 and board 5
is located with the center and long sides together.

The moderation plate 30 that comes into contact with the rear end of the case 20 is made of an insulator, and a cylindrical shaft support tube 32 is provided at the front of a flat plate portion 31 with an outer shape equal to that of the case 20.
and an annular moderation ring 34 which is concentric with this and has wave-shaped moderation teeth 33 facing forward at equal intervals, and a circular shaft support hole 35 is provided in the center of the shaft support cylinder 32. It is provided so as to also penetrate the flat plate portion 31. Further, the flat plate portion 31 has positioning protrusions 27 and 2 provided on the case 20.
Locking holes 36, 36', . . . corresponding to the holes 7', . In this embodiment, the moderation teeth 33 are formed at intervals of 30 degrees.

A synthetic resin contact type object 40, which is housed in a space formed by the board 5 and the front chamber A of the case 20 so as to be rotatable at a predetermined angle, has a disk shape with a diameter slightly smaller than the inner circumference of the front chamber A. A shouldered shaft 43 with a shoulder 42 that fits into the round hole 6 of the board 5 at its tip and comes into contact with the board 5 is protrudingly provided at the center of the front surface of the pedestal 41, and a serration 44 is provided at the center of the rear surface of the base 41. A serration shaft 45 having a diameter that penetrates the bearing hole 24 of the shelf 23 of the case 20 and rotatably fits therein is provided on the circumferential surface, and furthermore, a serration shaft 45 is provided on the circumferential surface of the case 20 and has a diameter that extends approximately three-fourths of the periphery of the rear surface. A jetty 46 that slidably abuts on the shelf 23 of the case will be described, which forms a quasi-isosceles triangular bell-shaped recess 47 that surrounds the serration shaft 44 and has an arc concentric therewith as the apex. The outside of the bank on the opposite side of the opening of the recess 47 engages with the stop protrusion 28 of the case 20 to control the rotation of the contact type 40 by a predetermined angle (total of 30 degrees left and right). A stop groove 54 is provided for regulating the angle (60 degrees), and a through hole 48 is provided through the center from the front end of the shoulder shaft 43 to the rear end of the serration shaft 45. The bell-shaped recess 47 opens toward the window 25 of the case 20, and its opening is slightly larger than the opening between the front side columns 26 and 26' of the case 20. Reference numeral 49 denotes a fork-shaped contact formed from an elastic conductive plate, and its handle is attached to the front surface of the pedestal 41 of the contact type 40 by a known method, and its inner free end 49a is connected to the common contact 8 of the board 5. the outer free end 49
b is the fixed contact 1 according to the rotation of the contactor type 40.
0, 11 and separate.

A return spring 50 made of piano wire housed in the bell-shaped recess 47 has a coil portion 51 that loosely fits into the serration shaft 45, and linear legs 52a and 52 extending from the coil portion 51 until reaching the outside of the window 25 of the case.
The initial opening angle of the legs 52a and 52b before assembly is larger than the opening angle of the bell-shaped recess and the window 25, and after assembly, the side columns 26 and 26' of the window 25 are opened with appropriate pressure. press against.

An articulated object 60 made of an insulator, which is rotatably and freely movable back and forth in a chamber B at the rear of the case 20, has a cylindrical shape with a concentric double groove opening at the rear.
In the center of the bottom wall 63 facing the shelf 23 of the case, a receiving hole 62 is provided with a receiving tooth 61 that can engage with the serrations 44 of the contactor type object 40, and the double groove at the rear is provided with a moderation. The first groove 65 facing the moderation ring 34 of the plate 30 and the shaft support cylinder 32 of the moderation plate
A second groove 67 is formed opposite to the second groove 67 .
A central shaft 68 surrounded by is fitted into the shaft support hole 35 of the moderation plate so as to be rotatable and movable back and forth, and a non-circular hole 69 is formed at the axis of the central shaft 68 so as to reach the tooth receiving hole 62. has been done.

Coil springs 70a and 70b are housed at opposite positions on the diameter of the first groove 65, and the coil springs 7 are disposed on the peripheral wall and bottom surface of the first groove 65.
Recesses 71a, 71 to easily accommodate 0a, 70b.
b.

72a and 72b are metal balls with a diameter slightly smaller than the width of the first groove 65, which face the opening of the first groove 65, are located in contact with the coil springs 70a and 70b, and are biased backward by the coil springs. This presses against the moderation teeth 33 of the moderation ring 34, and imparts a moderation to the rotation of the moderation mold 60.

The shaft 80 made of metal or synthetic resin includes, in order from the front, a knob part 81, a narrow diameter part 82, and a non-circular part 8.
3, and a locking groove 85 is provided at the tip of the non-circular portion 83.
The narrow diameter portion 82 is rotatably and back and forth fitted into a bearing 86 in contact with the front surface of the substrate 5 at its front portion, and is loosely connected to the through hole 48 of the contact type member 40 at its rear portion. The rear end abuts the bottom of the tooth receiving hole 62 of the articulated part 60, and the non-circular part 83 fits into the non-circular hole 69 of the central shaft 68 of the articulated part 60, and the engagement of the shaft The c-ring 84 tightened in the stop groove 85 is attached to the center shaft 6.
The articulated member 60 is held in contact with the rear end of the shaft 80 so as to rotate and move back and forth together with the shaft 80. Note that the length of the narrow diameter portion 82 is made larger by a certain dimension l than the length from the front end of the bearing 86 to the rear end of the serration shaft 45 of the contactor mold 40.

The fixing fitting 87 made of a U-shaped metal plate abuts the bearing 86 with its front plate 88, and a band 89 extends rearward from the left and right edges of the front plate 88 by curving with the same curvature as the cylindrical portion 21 of the case 20. , 89' hold the base plate 5, case 20, and moderation plate 30, and fix them by bending claws 90, 90' provided at the tips of the bands through washers 91.

Next, the operation of the above embodiment will be explained. The upper half of FIG. 3 shows the shaft 80 in its normal unpressed state, and the lower half shows it in its pushed state.

(A) First, attach the shaft 80 to the coil springs 70a, 70.
To explain the state in which the knob part 81 is pressed against the urging force b, the rear end of the knob part 81 contacts the front end of the bearing 86, and the receiving tooth 61 of the articulated part 60 contacts the serrations 44 of the contact part 40. The balls 72a, 72b are located in the valleys of the moderation teeth 33. The contactor type object 40 is rotatably housed in the front chamber A, and the sides of the bell-shaped recess 47 are connected to the side columns 26 of the window 25 of the front chamber A,
Due to the biasing force of the return spring whose legs are fully opened between 26' and 26', the position is taken along the legs 52a and 52b, as shown in FIG. 5A. At this time, the free end 49a of the contact 49 connects the common contact 8 to the 49
b presses against the off portion 12. That is, Fig. 1
corresponds to the neutral position of .

(a) Next, when the pressure on the shaft 80 is released, the articulated part 60 is pushed forward by a distance l by the urging force of the coil springs 70a and 70b, and its receiving tooth 61 engages with the serrations 44 of the contact part 40. However, the switch maintains the neutral position.

(C) Next, in the state of (B), move the shaft to arrow H in Figure 2B.
The articulating type member 60 that moves together with the shaft 80 when rotated in the
Since the contact element 40 crosses over one mountain and articulates 30 degrees, it engages with the serrations and rotates together.
rotates 30 degrees in the H direction, and as shown in FIG. The contact 49 contacts the wall and is displaced in the H direction and is further biased, and the contact 49 rotates 30 degrees in the H direction, and the contact 49a connects to the common contact 8 and 49
b is in pressure contact with the contact 11, and the terminal 9 and the terminal 14 are electrically connected. That is, it corresponds to the position shown in FIG.
At this time, the torque (approximately 50 gcm in the embodiment) that returns the contact element 40 in the L direction by the force applied to the return spring 50 is greater than the starting torque of the articulation of the articulation element 60 (approximately 300 gcm in the embodiment). Since the coil springs 70a, 70b and the return spring 50 are formed to be sufficiently small, the shaft 80
The switch will remain in this state even if the force to rotate it is released. That is, the position shown in FIG. 1 and 2 is maintained.

(d) Next, when the shaft 80 is pressed again, the receiving tooth 61 separates from the serration 44 in accordance with the operation in (a) above, and the contactor type 40 rotates in the L direction by the force urged by the return spring 50. The contact 49b is then returned to the position shown in Fig. 5A and held at this position.
is located at the off portion 12, and maintains this state (the state shown in FIG. 1) even when the pressure is released.

(e) Next, after releasing the pressure on the shaft 80 in the state of (d), move the shaft 80 in the direction shown by the arrow L in Figure 2.
When it is rotated in the direction of (c), it performs the same operation as in (c) above, but in the opposite direction, and even when the rotational force is released, it maintains the state corresponding to FIG. 1, 3.

(F) Next, when the shaft 80 is pressed in the state (E), the contact 49b returns to the neutral position again and remains in this state even when the pressure is released.

Figure 6 is a side view of an application example of the switch of the present invention.
An electrical component 91 (for example, a variable resistor or a rotary switch) that is operated independently by an outer shaft 90 concentric with the shaft 80 is fixed to the front surface of the board 5, and the structure and operation of the switch section are the same as in the previous embodiment. It's exactly the same.

FIG. 7 is a plan view of the substrate of the second embodiment.
In the embodiment, one pair of contacts is provided, but in this embodiment, two pairs of fixed contacts 10, 10',
11 and 11' are provided at equal intervals with the off part 12 in between, and the rotation range of the contact type object 40 is 120 degrees.
In the operations corresponding to operations (c) and (e) of the first embodiment, the shaft 80 moves two knots in the H direction and two knots in the L direction. From the explanation of the operation of the first embodiment, for example, in the first articulation in the H direction, the contactor presses against the fixed contact 11 to perform rapid forwarding, and the second
It is easy to understand that it is possible to press the contact point 11' with articulation to provide an effect such as slow feeding, and then by pressing the shaft, it returns to the off part 12 and maintains the neutral state. .

Since the present invention is constructed and operates as described above, when used in a car radio, etc., the shaft is moved in the H direction or the L direction and released, and when the desired station is selected, the shaft is moved. If you press and let go, you can continue listening to the broadcast, which makes it easy to operate and allows safe driving.However, the drawback of the conventional model is that it is difficult to return to the neutral point and often ends up exceeding the neutral point. can be improved.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a switch with a neutral position, Figs. 2 to 5 relate to an embodiment of the present invention, Fig. 2 A is an example front view, Fig. 3 B is a front view, and Fig. 3 is a circuit diagram of a switch with a neutral position. 4 is an exploded perspective view showing one part of the main components, FIGS. FIG. 6 is a side view of an applied example of the switch of the present invention, and FIG. 7 is a plan view of a substrate of another embodiment. 5: Board, 8: Common contact, 9: Common terminal,
10, 11: Fixed contact, 12: Off part, 13, 1
4: External terminal, 20: Case, 25: Window, 30:
Moderation plate, 33: Moderation tooth, 34: Moderation ring, 40: Contact piece, 44: Serration, 45: Serration shaft, 47: Bell-shaped recess, 49: Contact piece, 5
0: Return spring, 52a, 52b: Leg, 60: Articulate type object, 61: Receptacle tooth, 62: Receive tooth hole, 65: Groove, 7
0a, 70b: coil spring, 72a, 72b: ball, 80: shaft.

Claims (1)

[Scope of claims for utility model registration] (1) Insulating case 20 with openings at the front and rear
an insulating substrate 5 fixed to the front end of the case, and having at least one pair of fixed contacts sandwiching a common contact and an OFF part in between and a common contact each independently conducting to an external terminal on the rear surface; A moderation plate 30 is fixed to the rear end of the case 20 and has an annular moderation tooth on the front surface, and the case 20 is held rotatably and movable back and forth.
a shaft 80 penetrating therein; an articulated object 60 fixed to the shaft and housed in the case so as to be rotatable and movable back and forth; and an articulated object 60 interposed between the articulated object and the moderation plate 30. An articulation biasing member that moderates the rotation of the articulation model and urges it forward; and an articulation biasing member that is located between the articulation model 60 and the base plate 5, and is loosely fitted to the shaft and rotates around it. It is rotatably housed in a case, and has a serration shaft in the center with a serration shaft at the rear end that can mesh with the receiving tooth provided on the front surface of the articulated type, and a contact element that connects and disconnects from the common contact and the fixed contact. A symmetrical return spring 50 which is fixedly fixed and extended through a window provided on the side surface of the case is housed in a bell-shaped recess provided around the serration axis, with the shape of the return spring 50 almost matching the shape of the return spring 50 made of an insulating material. 40, and when the shaft 80 is pressed to position the articulating member 60 rearward against the urging force of the articulating urging member, the serrations of the contact member 40 and the articulating member 60 is loosely engaged with the receiving tooth, and the contact mold 4
At 0, the neutral position is maintained by the return spring, and the contact is located at the off part. When the pressure is released, the articulation type member 60 moves forward due to the pressing force of the articulation urging member, and the serration and the receiving tooth are moved forward. a neutral point that regulates the spring pressure between the return spring and the articulated biasing member so that the contactor can be kept in contact with the desired fixed contact and common contact by selectively rotating the shaft in this state; Automatic return switch. (2) The articulation biasing member interposed between the moderation plate 30 and the articulation member 60 is made of a ball that contacts the moderation tooth of the articulation plate and a coil spring housed in a groove of the articulation model that presses the ball. An automatic neutral point return switch according to claim 1 of the utility model registration claim consisting of: