JPS59101923A - Push-button type tuner - Google Patents

Abstract

PURPOSE:To make a tuner small-sized and also to stabilize a channel selecting operation and an operation of a needle mechanism by constituting so that a channel selection is executed by varying relatively a pair of magnetic cores which appear frequently, respectively from both ends of a single core body. CONSTITUTION:In a preset state, when a knob 8 is rotated in one direction, channel selection frames 5, 6 move relatively forward and backward, respectively. Following this movement, slide plates 12, 13 move in the direction where they approach each other, and magnetic cores 15a, 15b are both varied in the disappearing direction against a coil body. On the contrary, when the knob 8 is moved in the opposite direction, the cores 15a, 15b are projected at the most from the coil body. Also, when the slide plates 12, 13 move in the approaching direction, an operating link piece 28 rotates counter-clockwise. On the other hand, when the slide plates 12, 13 move in the separating direction, the link piece 28 rotates clockwise. Accordingly, a connecting piece of a needle mechanism attached axially to a center axial piece 28a of the link piece 28 moves to the left and right, by which the tip of the needle part piece indicates a dial scale, moving horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pair of eight tuning pieces that appear and disappear from both ends of a single coil body by a pair of tuning frequency regulating pieces that are located front and back and are relatively displaced. Tuning is performed by varying the magnetic core in a variable tuning unit having a magnetic core in a relative direction, thereby shortening the sliding stroke required for one tuning and downsizing the tuner. In addition, the stability of the operation of the channel selection pot and the pointer mechanism is ensured.An example of this will be described in detail below with reference to the drawings. L pairs of threaded portions +a+ (41) with different helical directions are formed at the front and rear positions of 21.

Each of these has a selection piece for specifying the same frequency + 51. +6
1 are screwed together, a locking piece (7) fixed in the axial direction and free in the rotational direction is provided at an intermediate position between the two, and a knob (8) is provided at the rear end. Therefore, this channel selection member (1) is attached to the front and rear plates +91a of the support frame (9), (
9To is rotatably supported on a sliding plate, and the rear plate (9
) A return spring is interposed between the knob (8) and the knob (8).

The channel selection pieces (51, +61 each have a downward protrusion (51a).
, f61a also has a downward protrusion (
7) a are provided respectively, and the protrusions t51a and [61
B and (7)a are commonly engaged with the slit (III) extending in the front-rear direction provided in the bottom plate (9)c of the support frame (9). ) front and rear plates (91a,
The pair of slide plates u51 is a variable tuning unit equipped with a plurality of "5'J variable tuning elements" consisting of a single coil body and l pairs of magnetic cores that protrude and retract from their relative positions, such as the support frame (9). The sharpening cores (151a and 151b are attached to the top plate (91d) and the slide plate (151b) is attached to the top plate (91d).
2+, (131). (16j is attached to the surface of the bottom plate (9) c of the support frame (9) through the engagement of the pin (17) and the long hole so that it can move laterally. On the lock plate, place the locking pieces (
An inclined edge (20) that acts with the protrusion (7) a of 7) to apply lateral force to the lock root wall against its return spring α9.
and a locking step (211) with which the protrusion (7) a locks, and a notch (221) is opened. (2 flies, n
b is slide 8! A pair of support rods each having an inner end facing the through hole (241) provided in the through hole (241, each pivoted at the center position of the rod and extending in the front-rear direction, and each outer end thereof facing the variable tuning unit 05). Front and rear plates (91a,
t91b and a stopper c! at this outer end. 51a, IIl! jI have been established. (2
) is a pressure biasing mechanism, which includes a manufactured link bar in which a central shaft piece 1281a is inserted into a guide hole Cη extending in the front-rear direction provided on one side of the top plate (9) d of the support frame (9); Slide plates ua arranged in parallel and opposite directions from both ends thereof
, u, i's fold u+a, (13Ia has 71 points respectively)
1 connected connecting piece 'J91t *(29&), presses the front 6 central axis piece (to) a backward, and in the standby state, the front qi core u shea is fully inside the coil body. It consists of a spring group that holds the magnetic core so that it fully protrudes from the inside of the coil body.

(3υ is a pointer mechanism installed on the upper surface of the large plate of the support frame (9). As shown in FIG. A moving piece (3), a horizontal moving piece (133+) which is connected to the free end of this rotating piece (32) and moves laterally by the rotation of the rotating piece C34, and a cross-shaped vertical piece ( One end of 34h is connected to the horizontal movement plate □, and one end of the horizontal movement plate □ is pivotally connected to the top plate (9) d (36j, and a pair of link pieces arranged left and right symmetrically). 37) a, !3
It consists of a pointer rod (341) whose other ends are pivotally connected.

Then, the return spring (10) presses the knob (8) of the tuning member (1) which is in the return state, and the shaft rod (21) is pressed.
When you move forward, each selection piece +51. +6) respectively come into contact with the corresponding slide plates (L, (131). In this example, the front slide plate a is provided with a tongue piece U-ri b facing downward by cutting and raising. The tuning pieces (51 are brought into contact with each other), so that the longitudinal distance between the l pair of slide plates u, ke 3 is defined by the relative spacing of the l pair of tuning pieces +5+ and t6+, and the tuning is performed. Achieved.On the other hand, the shaft (2
1, the protrusion (7)a of the locking piece (7) acts with the notch (slanted edge 0 of 2z) and temporarily moves the lock base sideways against the spring (191). After moving, the locking step part (2
1+, the forward movement state of the channel selection member (11 is maintained,
Maintain the selected state. When the knob (8) is rotated in this state, a pair of tuning pieces (5+, (6+) move in the relative direction, and following this, a pair of slides a (1
21, (13+ also move back and forth in the relative direction, thereby changing the appearance and retraction positions of the pair of magnetic cores a5!a, (15To) and performing one reset.The pair of tuning pieces by this preset operation +51. +61 and l pair of slide plates (1
21, (To explain the relationship with 131 in more detail: As shown by the solid line in Figure 5, this week's game piece (51, +61 is the screw part +31, respectively. Pieces (5).

(6) In the preset state in which the slide plates u:a and ua+ are in pressure contact with each other, the 11 pairs of magnetic cores a51a, the effective length of the magnetic core a51a, are immersed in the coil body, and the tuner is located at the middle position of the frequency bandwidth. Synchronize. From this state, when the knob (81) is rotated in one direction, the front selection piece (5) moves backward and the rear selection piece (61 moves forward), as shown by the imaginary line in the figure. With this movement, the l pair of slide plates (la, (13) move in the direction closer to each other, and the l pair of magnetic cores eG':Ib are both variable in the retracting direction with respect to the coil body, and the pair of slide plates (la, (13) When the interval between the selection pieces +51. +61 is the minimum, the l pair of magnetic cores f151a, L1
5To is most immersed in the coil body and tuned to the lowest frequency of the frequency bandwidth. That is, in this case, stations ranging from the middle position of the frequency bandwidth to the lower frequency range are preset. On the other hand, when the knob (8) is rotated in the opposite direction, the front selection piece (5) moves forward and the rear selection piece (6) moves backward, contrary to the above. A pair of slide plates (
(+31 moves in the direction away from each other.) A pair of magnetic cores (15)a, 0.511 are both variable in the protruding direction with respect to the coil body, and a pair of tuning pieces (51, (6) ), a pair of magnetic cores fi51a,
(15To protrudes the most from the coil body, and the coil body is in an air-core state. In this case, stations in the high frequency range from the middle position of the frequency bandwidth are reset, and this operational relationship is changed during the tuning operation. The same is true.

Then, as shown by the imaginary line in Figure 1, the tuning member (11 is the other tuning member) held in the forward state and after the preset operation (11 is the other tuning member (for the in-tuning operation or the preset operation after being suppressed When the rod (2) is advanced and the protrusion (71a) of the locking piece (7) acts on the notch (221's inclined edge (20+) and moves the lock plate (+61) laterally against its return spring a9 is automatically returned by the return spring QO1.Next, the above-mentioned elastic biasing mechanism (26) and pointer mechanism (
31) To explain in detail the relationship between Selection of one round cylinder F51. +61
are respectively threaded portions +31. Press the channel selection member +11 while it is in the intermediate position of +4+, and lock the lock plate (
16) and the protrusion (7) a of the locking piece (7). +61
In the preset state in which 131 is in pressure contact with each other, the operating link piece (2a of the elastic biasing mechanism (26+) is in contact with the lock plate (I
6), and the pointer rod of the pointer mechanism example is placed parallel to the channel selection member (1), and in this state, as described earlier, l pairs of magnetic cores (151a, σ5b 4 of its effective length are respectively immersed in the coil body.

From this state, when the knob (8) is rotated in the direction to reduce the distance between the pair of tuning pieces (51, +61), the pair of slide plates tJL +131 also move in the direction closer to each other, and the operating link piece (281 rotates counterclockwise from the solid line in Figure 6 as shown by the imaginary line in Figure 6, and also pinches (8) the pair of selection pieces (51, 161) in the direction that increases the distance between them. When rotating, a pair of slide plates Q
2j, (131 moves in the direction away from the operating link piece (
281 rotates clockwise from the state shown by the solid line in FIG. Therefore, the connecting piece t2!Jl of the pointer mechanism Gυ pivotally attached to the central shaft piece (28!a) of the operating link piece (281) swings from side to side with the rotation of the operating link piece C8i, thereby causing the horizontal movement plate The lock moves laterally in its longitudinal direction, and the pointer piece (34) swings left and right using the connecting point 351 with the transversely moving plate lock and the pivot point (A) as rotational fulcrums, and the tip of the pointer section indicates the dial scale while moving horizontally.

The above embodiment has described the case in which two channel selection members (1) have knobs (8) on themselves, but in the seventh to IT diagrams, l pairs of channel selection members are arranged in series on the left and right positions of the operating member. Another embodiment is shown in which the interlocking relationship between the left and right channel selection members and the operation member is switched every time the operation member is suppressed, and the operation member performs the channel selection operation and the preset operation. ,
This embodiment will be described in detail below. The operating member (411 is made up of a long shaft rod (4υ), and this shaft rod (4υ has a downwardly facing folded piece (4mm) at the front and rear, and has a top surface (421b). A switching lever (43) whose middle portion is rotatably attached to The folded piece (4mm, (
A shaft rod 0υ is inserted into the 4To, and it is attached so that it can be freely rotated in the direction of the fixed shaft in the axial direction. The tip of the switching lever is formed wide with a V-shaped tongue piece (43m, (43b), and the supporting piece (
An arc-shaped hole 06 that engages with the bottle (451 and limits the rotational range of the switching lever (43)) is formed on the upper surface of the shaft (4υ).
has a non-circular cross-section with a part of the side surface cut in the axial direction, and this front part (4 moats is always pressed backward by a spring 471, and also moves in the direction of rotation and is blown in the axial direction). A main drive gear (48) is inserted through the drive gear (48), and a knob (8) is pivotally attached to the rear end. and the rear plate (
A return spring (49) for the operating member ΩQ is interposed between the rear plate (9) and the knob (8).
) is attached to the bottom plate (9)c of the support piece (421).
A guide sleeve (50) is formed which engages with the extended lower end of 1b and guides its sliding movement in the front and back direction. A pair of tuning members (bn, trowel n') which form a pair with the operating member are similar to the tuning member (1) described above, and have the same structure, so for convenience, one tuning shaft is used. The specific configuration of Q51) is shown, and the other one is distinguished by adding ('') in the figure.

That is, the channel selection member 1) consists of an elongated shaft rod Q, and this shaft rod 6 has threaded portions -2 with different helical directions located at the front and back.
(goods), an operating part that is formed in a horizontal U-shape and whose front and back pieces are fixed in the axial direction and free in the rotation direction so that the rear threaded part (goods) is sandwiched, and a tip that competes with the shaft rod. The main drive float (Sub Ixhm single 07, which can be attached with 481 and 1 and also has a larger diameter), which is located at A horn-shaped channel selection piece, which is screwed into the threaded part 9>1t641, is provided respectively, and the operating part (end) is provided with one tongue piece (4) of the switching lever (43). A projecting piece that comes into contact with the rear edge of the switching lever (43) to apply rotational force to the switching lever (43); At times, a locking piece In) for cooperating with the channel selection member (51) is provided, and the thus configured channel selection member Q51) and No.B' are connected to the operation member (4).
The front plate (9) of the support frame (9) is located parallel to the left and right sides of G.
The rotary pot is supported by a and the rear plate (9 stones) so that it can move freely back and forth.

and the rear end flange I of the rear plate (91b' and the shaft rod -, υ')
A return spring 9-' is interposed between the support frame bottom plate (9)C and the support frame bottom plate (9)C, and a return spring 9-' is provided on the front piece of the action piece 2)'. The downward facing tongue piece -1-' and the front selection theater group, @', are set to the downward facing protrusion.

(a) Guide slits m, ett', and -' are formed, respectively, to engage with A and guide its forward and backward movement.

Therefore, the relationship between the operating member (4Q) and the pair of channel selection members (property) and (property)' located on the left and right sides is as shown in Fig. is held in a forward moving state by a lock plate, which will be described later, and the tuning shaft Q51) located on the left side and the operating member (41) are each moved by a return spring.
and 09), it is in the p return state, and the switching lever (4
3 is tilted to the left side 1 and is in a state opposite to the locking piece of the operating part provided on one tongue piece (the front edge of 4, 1a is located on the left side of the tuning member Q51), from this state When the knob (8) is pressed down, the operating member (4G and the tuning member t5n located on the left side are moved together) through contact with the one tongue piece (the locking piece II between the 4G and the operating member). During this forward movement, as will be described later, the forward motion holding function of the right side selection member f511' is released, and the return spring H' returns the selection member f511' to the left side position. The forward moving state of the station member 51) is maintained by a lock plate, which will be described later, and when the knob (8) is released, the operating member 4 (j is returned by its return spring, Then, the operating part (
4), the switching lever rod 3 rotates clockwise as shown in Figure 2. In this state, it is held by a spring (4) and the switching lever (431) rotates as shown in Figure 1θ. The front edge of the other tongue piece t43b is brought into contact with the locking piece +15]1' of the operating member provided on the other channel selection member QJ.

In other words, the operation member (4 (io1 front/back/backward movement switching lever (4
3 is switched alternately, so that the operating member (4G) and a pair of left and right channel selection members (2)' can move together in the forward movement direction relative to each other.

A lock plate is disposed through engagement between a bottle (B) and a long hole so as to be able to move laterally in the width direction on the C surface of the bottom plate (9) of the support frame (9). The plate is always urged in one direction in the longitudinal direction by a spring 4. This lock plate has a mechanism in which, when the tuning member moves forward together with the operating member, the tongues provided on the operating parts of the tuning shaft act to lock the lock plate with its spring. a slanted edge which moves laterally in a direction against the elastic force of 70; and a locking step sn which locks with the tongue pieces 1' to 1' when the channel selection member moves forward sufficiently;
A holding part (71) is provided corresponding to the position of each channel selection member 5n, however, n'. Similarly to the example, a variable tuning unit (L51 and 1) having a pair of magnetic cores α51a and (L5To tl-) is supported at both ends by guide rods (141) so as to be movable back and forth, and a pair of slide plates (121, (
131 are arranged. This pair of slide plates (1
21, (131 has a central portion extending in the front-rear direction and penetrating the inside of the variable tuning unit α9, and having both ends slidably on the front and rear edges of the top plate (9) d of the support frame (9), respectively. The supported support rods C!31a and t231b are each fixed individually.Furthermore, in this embodiment as well, one elastic biasing mechanism (2
6) Additionally, pointer mechanisms 1311 are provided on the top plate (91d) of the support frame (9), as in FIG. 4.

However, from the state shown in Figure 7 or Figure 1O, turn the knob (8)
When the full suppression operation is performed, one of the channel selection members Q)]) to (511' located on the left and right thereof moves forward together with the operating member i1m, and the channel selection portion side that is moved forward becomes the operating member - to □
□□' tongue piece - or 1' engages with the inclined edge (c) of engagement 5 (2)
When the lock plate temporarily moves sideways by contacting the lock plate a and then locks with the locking step, the forward movement state is maintained, and the selection which is already held in the forward movement state The station member is released from its forward movement holding state and automatically returns when the lock plate is moved laterally. And in this state, as already mentioned, the front and rear l pairs of selection pieces (to), shouts to (4)', -
′ are in contact with the corresponding slide plates (121°0 and 1
The protruding and retracting positions of the pair of magnetic cores (151a and (151b) can be varied, thereby achieving channel selection.

Then, when the knob (8) is released, its return tin IJ
The operation member (401) also returns to the seventh position by the ring (49).
It is in the state shown in the figure or FIG. 1O, and meshes with the main drive gear (channel selection member 05 with mark 4 held in the forward moving state) to (driven gear 6'I of 5D') to 671'. Also, if you turn the knob (8) from the state shown in Figure 7 or 10,
A preset operation is performed for the channel selection members In to B' in the forward moving state through the engagement between the main gear (481 and the driven gears 481 and 6). At the time of this preset operation, the pair of magnetic cores (151a , (The relationship between the protruding and retracting movements of 15%, the action of the elastic pressure biasing mechanism c261 during this protrusion and retraction movement, and the operation of the pointer mechanism 3v accompanying the action of the elastic pressure biasing mechanism C261) are the same as in the case of the previously described embodiment. It's exactly the same.

As described above, according to the present application, the sliding stroke of the slide plate can be compared with a conventional tuner comprising a variable tuning unit t-configured in which a single magnetic core is moved in and out of a single coil body. This means that the slide plate moves from the position of the selection piece of the selection member that has moved forward and is in the tuning state to the position of the selection piece of the selection member that is newly pressed and is in the forward process. It is effective in weakening the collision force between the slide plate and the tuning piece when it moves, and preventing tuning errors caused by the action of the collision force, and also prevents the slide plate from resisting the elasticity of the spring due to external vibration. Even if there is a slight fluctuation in the inductance, the pair of magnetic cores will fluctuate in the same direction at the same time, so there is no risk of the two inductances changing, resulting in stable tuning! $
- Also, there is no risk of rotational displacement of the operating link piece of the elastic biasing mechanism due to external vibration, and furthermore, the rotation of the operating link piece is distributed in the left and right directions from the center position parallel to the lock plate. As a result, the width of the reciprocating movement when the pointer changes the indication is halved, which eliminates the unsightly appearance.The load of the pointer mechanism is evenly applied to the pair of slide plates, which stabilizes the pressure drop. It has the advantage of being able to operate the needle mechanism and display the dial.

4 The simple continuation drawings in Figure (8) show an embodiment of the present application, with Figure 1 being a partially omitted overall plan view, Figure 2 being a sectional view taken along the line A-A in Figure 1, and Figure 3 being a cross-sectional view taken along the line A--A in Figure 1.
The figure is a partial plan view showing the relationship between the elastic force biasing mechanism and the slide plate, Figure 4 is a plan view showing the pointer mechanism, Figure 5 is a partial plan view showing the state of preset operation, and Figure 6 is the elastic force bias 7 is a partially omitted plan view showing another embodiment corresponding to FIG. 1; FIG. 8 is a sectional view taken along line B-B in FIG. 7; FIG. 9 is a partial plan view showing the operation of the mechanism; is a sectional view taken along the line C-C in Fig. 7, Fig. 0 is a plan view showing the operational relationship between the operating member and a pair of channel selection members in Fig. 7, and Fig. FIG. 3 is a partial plan view showing the relationship between the force mechanism and the slide plate.

In the figure, ti+, t6n, and υ' are the channel selection members (2+, (4
υ, (rotation), Q' is the axis, +, a+, t4r, m
, w:u, h' is the threaded part -t51.16+.

Threat, (g)', @, 4' is the selection piece, (7) is the locking piece, (
8) is the knob, (9) is the support frame, α force, u31 is the slide@, Q51 is the variable tuning unit, tt51a, tt*
is the magnetic core, Ou, - is the lock plate, (4) i, Qk are the inclined edges, II, σ are the locking steps, uk.

The gull is the support rod, @ is the elastic pressure biasing mechanism, (2) is the guide slot, l is the actuation link piece, t28) a is the center shaft piece 19) a, t2
The horse is a connected piece.

The equipment is spring 20υ is the pointer mechanism, c32 is the rotating piece, (
(37)a) is a horizontal movement plate, 841 is a pointer piece, (37)a,
C37b Hall link piece - (4 (Jr is the operating member, (4
21 is a support piece, (43 is a switching lever, (481 is a main drive gear, ■ is an operating part, 67) a, ← is a driven gear.

1st orchid Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 2 Figure 9 Figure 8 Figure 10

Claims (1)

[Scope of Claims] (A channel selection member consisting of a pair of front and rear threaded portions provided on an 11-axis rod with different helical directions and a channel selection piece movably screwed back and forth, respectively,
The support frame is equipped with a pair of sliding plates that are rotatable and movable back and forth, and a pair of sliding plates that are movable back and forth and that abut each other when the channel selection member moves forward, respectively, and a center shaft. Both ends of the actuating link pieces, each of which is guided in the front-rear direction, are
an elastic force biasing mechanism that is connected to the pair of slide plates and applies a slight rearward elastic force to the central shaft piece; A pointer mechanism that oscillates in accordance with the motion; a lock mechanism that holds the front movable portion of the channel selection member; and a plurality of variable elements in which a pair of magnetic cores appear and retract at both ends of the coil body. 1. A push-button tuner, characterized in that said pair of magnetic cores are respectively supported by said pair of slide plates. (2) a round moving piece whose one end is pivoted to the center shaft piece of the operating link piece of the two-pointer mechanism, and a transverse moving plate connected to the other end of the rotating piece to move horizontally; The push button type tuner according to claim 1, comprising a pointer rod having one end connected to the transverse movement plate and vibrating in the width direction of the support frame.