JPS6119565Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an interlocking mechanism for push-button tuners in AM and FM radio receivers, etc.

For example, Utility Model No. 48-45362 and Utility Model Number 55-11225
In the push button type tuner described in the above publication, the inductance value of the variable impedance element is changed by operating the manual tuning shaft, and the state of the variable inductance element is also changed by changing the push button mechanism. must be mechanically stored in the push button mechanism. Further, the variable inductance element must be driven by operating the push button mechanism to bring the variable inductance element into a state corresponding to the state written on the push button mechanism. by the way,
When the variable inductance element is driven by operating the push button mechanism, it is necessary to separate the drive mechanism based on the manual tuning shaft from the variable inductance element using a clutch mechanism in order to facilitate or enable this driving. Therefore, the interlocking mechanism in a tuner using a variable inductance element has necessarily become complicated.

Therefore, the purpose of the present invention is to provide an interlocking mechanism between a manually tuned shaft and a variable impedance element, which is capable of transmitting displacement with relatively high precision despite having a relatively simple configuration. be.

To achieve the above object, the present invention will be described with reference to the reference numerals in the drawings showing the embodiments for easy understanding. The rotation transmission wheel 1
a transmission wheel support 20 that rotatably supports the rotation transmission wheel 7 and is displaced so that the rotation transmission wheel can take a rotation transmission position and a rotation non-transmission position; A crank 18 that has a fan-shaped engagement surface 19 that engages with the rotation transmission wheel 17 at a certain time, has a slider engagement portion 30 and a sliding plate engagement portion 33, and is rotatably supported; When the transmission wheel 17 is in the rotation transmission position where it can transmit rotation to the crank 18, apply a force in a direction to press the rotation transmission wheel 17 to the crank 18 with a force that does not interfere with rotation transmission. The transmission wheel compression spring 25 is engaged with the transmission wheel support body 20 so as to apply the pressure, and the transmission wheel compression spring 25 is applied to the slider engaging portion 30 of the crank 18 so as to be linearly displaced following the rotation of the crank 18. The engaged slider 31, the movable part of the tuning variable impedance element coupled to the slider 31 so as to be displaced following the displacement of the slider 31, and the impedance value changing according to the displacement of the movable part. The fixed part 2 of the variable impedance element associated with the movable part and the tuning circuit part 31 to which the variable impedance element is connected are each configured to tune with the specified plurality of frequency signals. a plurality of push button mechanisms 28 and a plurality of push button mechanisms 28 selected from the plurality of push button mechanisms 28, which are displaced in response to the operation of the push button mechanism 28 and engaged with the crank 18 so as to rotate the crank 18 in response to the displacement; In a push button type tuner equipped with a sliding plate 34, the force in the same direction as the pressing direction by the transmission wheel crimping spring 25 is applied with a strength that does not hinder the rotation of the crank 18. The present invention relates to an interlocking mechanism for a push button type tuner characterized in that a crank biasing spring 38 provided to the crank 18 is engaged with the crank 18.

According to the above-mentioned present invention, the interlocking mechanism is simplified because the clutch mechanism is used to connect and disconnect rotation transmission depending on whether or not the rotation transmission wheel 17 is brought into contact with the crank 18. However, since the crank biasing spring 38 applies a force in the same direction as the pressing direction of the transmission wheel compression spring 25 to the crank 18, there is no play between the crank 18 and the shaft 29 that pivots the crank 18. Even if the rotation transmission wheel 17 is compressed or separated, the crank 18 hardly ever shakes. Therefore, transmission via the crank 18 can be performed accurately.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 20 show a tuner according to an embodiment of the present invention, in which FIG. 1 is a plan view thereof, and FIG. 2 is a sectional view taken along the line -- in FIG. 1.
In FIGS. 1 and 2, 1 is a variable inductance element, which is composed of a fixed part 2 consisting of a coil, a case, etc., and a movable magnetic core 3, which is a corresponding movable part. 4 is a tuned circuit section to which the variable inductance element 1 is connected, and the tuned circuit section 4 and the variable inductance element 1 form a tuned circuit. Reference numeral 5 denotes a manual tuning shaft, which is rotatably supported by a frame 7 with a screw or worm 6 to constitute a worm gear device. A gear 8 meshes with the worm 6. A wire spring 9 for holding down the tuning shaft is engaged with one piece 7a of the U-shaped frame 7 that supports the tuning shaft 5, and this wire spring 9 moves the tuning shaft 5 in the direction of the arrow 10 in FIGS. is being pressed. As a result, the worm 6 and the gear 8 mesh with each other with little play.

As best seen in FIG. 4, the gear 8 that meshes with the worm 6 is rotatably supported by a shaft 11 fixed to the frame 7. and gear 8
A spherical recess 12 is provided at the bottom of the movable shaft 13, into which a spherical head 14 of a movable shaft 13 is inserted. Furthermore, the cylindrical protrusion 8a of the gear 8 has a slit 1.
5 and supported by a spherical head 14
6 is inserted, the gear 8 and the shaft 13 are engaged with each other in the rotational direction by this pin 16, and the shaft 13 rotates following the rotation of the gear 8. However, since the shaft 13 is connected to the gear 8 at the spherical head, displacement in the vertical direction is virtually impossible; however, the head 14
A pendulum-like displacement around is possible,
It has a flexible arm configuration.

The rotation transmission wheel 17 fixed to the lower part of the shaft 13 is a friction wheel and comes into frictional contact with the fan-shaped engagement portion 19 of the crank 18. A support body 20 that supports the rotation transmission wheel 17 is rotatably supported by a shaft 21.
Therefore, due to the rotation of the transmission wheel support 20, the rotation transmission wheel 17 assumes a rotation transmission position in which it contacts the crank 18 and a rotation non-transmission position in which it is separated from the crank 18. Therefore, the rotation transmission wheel 17 operates as a clutch wheel.

Transmission wheel support 20 for clutch actuation
has an engaging portion 24 that engages with an engaging pin 23 implanted in the clutch operating sliding plate 22, and when the sliding plate 22 moves leftward in FIG. The transmission wheel 17 rotates and separates from the crank 18. A transmission wheel pressure spring 25 is engaged with the transmission wheel support 20 for biasing the transmission wheel support 20 counterclockwise in FIG. 1 to press the transmission wheel 17 onto the crank 18. Further, the clutch operating sliding plate 22 is biased to the right by a return spring 26, as shown in FIG. The movement of this sliding plate 22 is as follows:
Push the inclined protrusion 27 provided here into the push button mechanism section 28
This is caused by pressure.

The crank 18 is rotatable about a shaft 29, and is engaged with a pin-shaped protrusion 32 of a slider 31 through a slider engaging portion 30 formed by a U-shaped notch at one end as shown in FIG. It is engaged with a pin 35 of a sliding plate 34 by a sliding plate engaging portion 33 formed by a U-shaped notch. The slider 31 includes a guide rod 36 extending in the same direction as the magnetic core 3 and supported by a support frame 99.
37, it moves linearly following the rotation of the crank 18.

Since the magnetic core 3 is fixed to the slider 10, when the crank 18 rotates due to the rotation of the manual tuning shaft 5 or the movement of the sliding plate 34, the magnetic core 3 is displaced in the axial direction, and the inductance value of the inductance element 1 is changes, and the desired tuning state is obtained.

As mentioned above, in this tuner, the interlocking mechanism and clutch mechanism have a simple structure. However, they are configured to work together relatively accurately. That is, the crank 18 is biased by a crank biasing spring 38 so that the crank 18 does not wobble due to the contact and separation of the rotation transmission wheel 17 and the crank 18 when the clutch operates. More specifically,
As shown in FIG. 2, a cylindrical protrusion 39 integral with the crank 18 is provided at the part where the crank 18 is attached to the support shaft 29, and a ring-shaped groove 39a formed in the protrusion 39 is inserted into a ring-shaped groove 39a. A biasing spring 38 is engaged, and one end and the other end of this spring 38 are supported by locking pieces 40 and 41. This spring 38 applies a force to the crank 18 in the direction indicated by an arrow 42 in FIG. Note that the force in the direction of the arrow 42 substantially coincides with the direction in which the transmission wheel pressure spring 25 presses the transmission wheel 17 onto the crank 18 . Therefore, the crankshaft 29 and the crank 18
Since the crank 18 is always pressed in the direction of the arrow 42 by the spring 38 even if there is a slight gap between the
does not shake.

In addition, in the interlocking mechanism using the crank 18 of this tuner, a wire spring 43 deformed from the solid line to the chain line in FIG. 20 is locked onto the crank 18 by a pair of locking pieces 44, 45. Sliding plate biasing spring part 4
3a presses the pin 35 in the direction of arrow 46 in FIG. 5, and slider biasing spring 43b presses the protrusion 32 of the slider in the direction of arrow 47 in FIG.
Therefore, play between the crank 18 and the sliding plate 34 and between the crank 18 and the slider 31 is prevented with an extremely simple structure. Furthermore, since the biasing force is applied by a single wire spring 43, a reduction in thickness and size is achieved.

This tuner tunes to a desired station, that is, frequency, using a manual tuning shaft 5, stores this tuning state in a memory board, and thereafter selects a station only by operating a push button mechanism 28 having a push button 48. It is configured. 7 to 17 show the push button mechanism 28. FIG. In these drawings, 49 is the first
50 is a second rotating plate. As shown in FIG. 10, this first rotating plate 49 has a U-shaped engaging portion 51 and a first memory plate engaging portion 52, and rotates around a pivot 54 inserted into a hole 53. Free to move. The second rotating plate 50 is formed symmetrically with the first rotating plate 49, as shown in FIG.
It has a U-shaped engaging portion 55 and a second memory engaging portion 56, and is rotatable about a pivot shaft 54 inserted into the hole 7.

A pin 58 is implanted in the sliding plate 34, and the pin 5 is inserted into the U-shaped engaging portions 51, 55 of the first and second rotating plates 49, 50, respectively, and the pivot 54 is connected to the fixed base plate 60. Since the slider 34 is guided by the groove 30a on the side surface of the container formed by bending the substrate 30 and moves in the first direction (vertical direction) shown by the arrow 59, Following this, the rotating plates 49 and 50 rotate clockwise or counterclockwise.

61 is a memory board formed in a fan shape;
As shown in FIG. 2, first and second rotating plate engaging portions 62 and 63 are provided with an interval of about 180 degrees from each other.
and a pin 66 serving as a pivot in the central hole 64.
is inserted. Note that the first and second rotating plate engaging portions 62 and 63 are connected to the first and second rotating plates 49 and 5.
In order to reliably engage the memory board engaging parts 52 and 56 of No. 0, it is formed with a bent part.

The memory support plate 65 is formed as shown in FIG. 13 and is arranged perpendicular to the sliding plate 34. A guide pin 68 is inserted into the elongated hole 67 formed here.
is inserted, and guided by it, arrow 6 is shown in Figure 7.
It is slidable in the second direction (left and right direction) indicated by 9. Note that the guide pin 68 is implanted in the substrate 60. In addition, the memory support plate 65 has a spring receiving protrusion 7.
0, which is pressed by a return spring 71 which applies a biasing force in the right direction in FIG. Further, this memory support plate 65 has a triangular tip 72, which is adapted to be selectively inserted into a notch 74 of an AM/FM switching sliding plate 73 of a radio receiver.

In addition to the memory board 61, the memory support plate 65 includes:
A lock portion 92 is attached to selectively prevent rotation of the memory board 61. This lock part 92
consists of a leaf spring 75 and a lever 76 for selectively actuating the leaf spring 75. As shown in FIG. 14, the leaf spring 75 for applying a counterclockwise force to the lever 76 in FIG.
It has a hole 77 into which the pin 66 of No. 5 is inserted, and a notch 79 into which the cut-out part 78 of the memory support plate 65 is inserted and the tip of the lever 76 is inserted. It has a pressing surface 80. The right end 81 of this leaf spring 75 is the eighth
It is bent downward in the figure and FIG. 9. Lever 7
6 is a thick plate that is relatively difficult to deform as shown in FIG. have

Memory support plate 65 for leaf spring 75 and lever 76
As is clear from FIGS. 7 and 8, which show the locked state of the memory board 61, and FIG. 9, which shows an enlarged view of the unlocked state of the memory board 61,
This is achieved by arranging a leaf spring 75 overlapping the memory board 61 and arranging a lever 76 overlapping the leaf spring 75. In the unlocked state shown in FIG. 9, the left end 84 of the lever 76 does not strongly push the leaf spring 75 toward the memory 61. Therefore, the memory board 61 is rotatable around the pin 66. On the other hand, in the locked state shown in FIG. 8, the lever 76 is urged to rotate clockwise about the cut-out portion 78, and its left end 84 strongly presses the leaf spring 75, causing the memory plate 61 is also strongly pressed through a leaf spring 75 and is locked substantially unrotatable. That is, the memory board 61 is in a state where a certain angle is stored.

Reference numeral 85 designates a plate-shaped lock control member, and as shown in FIG.
and a protrusion 87 for operating the lever 76.
and a stopper 88 provided on the memory support plate 65.
The push button 48 is attached to the right end of the stepped portion 89. When attached to the memory support plate 65, in the unlocked state shown in FIG. 9, the protruding part 87 does not press the tip engaging part 83 of the lever 76 downward in FIG. 9, and in the locked state shown in FIG. 87 is configured to press downwardly the tip engaging portion 83 of the lever 76.

In this tuner, the two push buttons 48a and 48b from the left in FIG. 1 are for FM, and the remaining three push buttons 48c, 48d, and 48e are for AM.
Triangular tip portions 72 of each memory support plate 65a to 65e correspond to each push button 48a to 48e.
However, the AM selection state in Fig. 18 and the FM selection state in Fig. 19
AM/FM switching sliding plate 7 as shown in the selected state
It faces the five notches 74 of No. 3. That is, the first
In the AM state shown in Figure 8, the tips 7 of the three memory support plates 65c, 65d, and 65e for AM on the right side
2 center and three notches 74 on the right side of the sliding plate 73
The centers of c, 74d, and 74e almost coincide, and the left side
The centers of the two memory support plates 65a and 65b for FM are located shifted to the left of the centers of the notches 74a and 44b. Therefore, when the memory support plate 65a for FM, for example, is pushed in in the AM state shown in FIG.
Press the left inclined surface 95 of a, and the sliding plate 73
Displace to the left in Figure 8 and move to the position in Figure 19,
The protruding portion 96 of the sliding plate 73 operates the AM/FM changeover switch 97 to switch to the FM state. As shown in FIG. 19, while the push button 48a is pressed,
The tip 72 of the memory support plate 65a is a notch 74a.
Insert to match exactly switch 97
is activated. Even when the pressure on the memory support plate 65a is released and the support plate 65a returns to its original position, the sliding plate 73 remains in the state shown in FIG. 19. Also, in the FM state in Figure 19, push buttons 48c to 4 for AM
8e, the tips 72 of the memory support plates 65c to 65e align with the right inclined surface 9 of the notches 74c to 74e.
8, the sliding plate 73 moves to the right in FIG. 19, and the AM state shown in FIG. 18 is obtained.

Next, the handling method and operation of the tuner configured as described above will be described.

First, when storing a broadcast station or frequency in the memory board 61, the lock control member 85 is pulled out to the position shown in FIG. 9 by pulling out the push button 48.
As a result, the locking or pressing of the memory plate 61 by the lever 76 and the leaf spring 75 is released, and the memory plate 61 becomes freely rotatable. However, the rotating plate engaging portion 6
2 and 63 are provided in the falling state in FIG. 9, their rotation is limited by the leaf spring 75. Therefore,
The rotating plate 49, with the engaging parts 62 and 63 facing in opposite directions,
No situation arises in which rotation of 50 becomes impossible. On the other hand, the magnetic core 3 is moved by the rotation of the manual tuning shaft 5, and a predetermined tuning state, that is, tuning is achieved. Then, the sliding plate 34 also moves in accordance with the movement of the magnetic core 3,
The position of the sliding plate 34 corresponding to the position of the magnetic core 3 is obtained. The sliding plate 34 has a first and a second pin 58.
Since the rotating plates 49 and 50 are engaged, a rotating angle of the rotating plates 49 and 50 corresponding to the position of the sliding plate 34 can be obtained.

In the setting state as described above, push button 48 and lock control member 85 are pushed to the left in FIGS. 7 and 8. At this time, when the left end of the lock control member 85 is moved under the leaf spring 75 and the lever 76, the frictional resistance given by the spring action etc. is set to be larger than the force of the return spring 74, so the lock control member 85 limits the rotation of the memory plate 61, the memory support plate 65 moves to the left against the return spring 74, and the rotation plate engaging portions 62, 63 of the memory plate 61 engage the rotation plates 49, 63. 17, the rotation angle of the memory plate 61 becomes a value corresponding to the rotation angle of the rotation plates 49 and 50. If the push button 48 is pressed further, the lock control member 85 moves, and the protrusion 87, which is formed so as to become gradually higher from left to right, enters above the tip of the lever 76 and controls the lever 76. It is rotated clockwise in FIGS. 8 and 9, and the left end 84 of the lever 76 presses the memory board 61 via the leaf spring 75 to lock it in that position. Further, the lock control member 85 is pressed toward the memory support plate 65 by the leaf spring 75 and the lever 76 and is elastically held in that position. When the push button 48 is released after the memory plate 61 is engaged with the rotating plates 49 and 50, the memory support plate 65 returns to the position shown in FIGS. 7 and 8 by the action of the return spring 74. Storage on the memory board 61 is completed.

Note that when the rotating plates 49, 50 and the memory plate 61 are engaged, the first rotating plate 49 rotates in the clockwise direction indicated by the arrow 90 in FIG. Since it rotates counterclockwise as shown by arrow 91, pin 58
is sandwiched between the U-shaped engaging portion 51 of the first rotating plate 49 and the U-shaped engaging portion 55 of the second rotating plate 50, and accurate engagement that eliminates the gap is ensured. To establish.

After storing the tuned frequency in the memory board 61 as shown in FIG. 7 and FIG. The second rotating plates 49 and 50 are engaged. Because the rotating plates 49 and 50 had been receiving different frequencies until now, the sliding plate 34
Even if the memory plate 61 is at an angle corresponding to another frequency, the rotating plates 49, 50 are moved to the rotating angle corresponding to the memory plate 61 in order for the memory plate 61 to engage with the rotating plates 49, 50. rotates, the sliding plate 34 moves following the rotation of the rotating plates 49 and 50, the crank 18 rotates following the sliding plate 34, and the magnetic core 3 further moves to the desired position. A synchronized state is obtained.

At this time, the clutch drive mechanism operates in conjunction with the operation of the push button 48, and the rotation transmission wheel 17 moves to the crank 18.
The channel selection is performed by the push button 48 independently of the worm 6 of the manual tuning shaft 5 and the gear 8.
If the push button 48 is released after selecting a station, the push button 48 is returned by the return spring 74, the clutch operating sliding plate 22 is also returned to its original position, and the rotation transmission wheel 17 is engaged with the crank 18.

As is clear from the above, the tuner of this embodiment has the following advantages.

(b) Although the clutch mechanism is composed of the crank 18 and the rotation transmission wheel 17, and the clutch mechanism is simplified, the rotation transmission wheel 17 is connected to the crank 1.
8 is applied directly to the crank 18 by the spring 58,
Even if there is a gap between the crank 18 and the shaft 29 that supports it, almost no backlash occurs due to the approach and separation of the rotation transmission wheel 17, making it possible to obtain accurate synchronization.

(b) Since the wire spring 73 is attached to the crank 18 and presses the pin 35 of the sliding plate 34 and the protrusion 32 of the slider 31 in one direction, rattling can be easily prevented. Furthermore, it is possible to make the device thinner.

(c) The memory board 61 is arranged horizontally, and the horizontally arranged rotating plates 49 and 50 are engaged with it to move the sliding plate 34, and AM-FM band switching is performed using the sliding plate 73. Since this is done by using a thin tuner as a whole, it is possible to provide a thin tuner.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto and can be further modified. For example, as shown in Figure 21,
A protrusion 32 is provided on the right side of the guide rod 36 of the slider 31, and a protrusion 32a is also provided on the left side,
Only one protrusion 32 is engaged with the U-shaped engagement part 30, the other protrusion 32a is made long enough not to contact the crank 18, and the wire spring 43 presses only the other protrusion 32a. You can. This makes it possible to prevent looseness between the guide rod 36 supported by the support frame 99 and the slider 31.

[Brief explanation of the drawing]

The drawings show a push-button tuner according to an embodiment of the present invention, in which FIG. 1 is a plan view of the tuner, FIG. 2 is a cross-sectional view taken along the - line in FIG. - Figure 4 is a partially cutaway sectional view showing a part corresponding to the - line in Figure 2. Figure 5 is a plan view of the crank part. A sectional view of a portion corresponding to the - line in Fig. 2, Fig. 7 is a sectional view showing a part of a part corresponding to the - line in Fig. 8, and Fig. 8 is a sectional view of a part corresponding to the - line in Fig. 7. FIG. 9 is a sectional view of a portion corresponding to FIG. 8 showing the unlocked state.
Figure 0 is a plan view of the first rotating plate, Figure 11 is a plan view of the second rotating plate, Figure 12 is a plan view of the memory board,
Fig. 13 is a plan view of the memory support plate, Fig. 14 is a plan view of the leaf spring, Fig. 15 is a plan view of the lever, and Fig. 14 is a plan view of the leaf spring.
Fig. 6 is a plan view of the lock control plate, Fig. 17 is a plan view showing the engagement relationship between the memory plate and the rotating plate, and Figs. 18 and 19 are the AM-FM switching sliding plate and the memory support plate. FIG. 20 is a plan view showing the wire spring 43. FIG. Figure 21 shows wire spring 43.
FIG. In addition, in the symbols used in the drawings, 1 is a variable inductance element, 2 is a fixed part, 3 is a movable magnetic core, 4 is a tuning circuit part, 5 is a manual tuning shaft, 1
3 is a movable shaft, 17 is a rotation transmission wheel, 18 is a crank, 19 is a fan-shaped engagement surface, 25 is a compression spring, 28 is a push button mechanism section, 30 is a slider engagement section, 33 is a sliding plate engagement section, 34 38 is a sliding plate, and 38 is a crank biasing spring.

Claims (1)

[Claims for Utility Model Registration] (1) A rotation transmission wheel 17 that rotates in accordance with the rotation of a manual synchronization shaft; a transmission wheel support 20 that is displaced so as to be able to take a rotation non-transmission position; and a fan-shaped engagement surface 19 that engages with the rotation transmission wheel 17 when the rotation transmission wheel 17 is in the rotation transmission position. a crank 18 which has a slider engaging portion 30 and a sliding plate engaging portion 33 and is rotatably supported; A transmission wheel engaged with the transmission wheel support 20 so as to apply a force in the direction of pressing the rotation transmission wheel 17 to the crank 18 with a force that does not interfere with rotation transmission when the rotation transmission wheel is in the rotation transmission position. a compression spring 25; a slider 31 engaged with the slider engaging portion 30 of the crank 18 so as to be linearly displaced following the rotation of the crank 18; a movable part of the tuning variable impedance element coupled to the slider 31 so as to be displaced; and a fixed part of the variable impedance element associated with the movable part so that the impedance value changes in accordance with the displacement of the movable part. 2, a tuning circuit unit 31 to which the variable impedance element is connected, a plurality of push button mechanisms 28 each configured to tune to the plurality of specified frequency signals, and a plurality of push button mechanisms 28 selected from the plurality of push button mechanisms 28. and a sliding plate 34 engaged with the crank 18 so as to be displaced in response to the operation of the push button mechanism 8 and rotate the crank 18 in response to the displacement. A crank biasing spring 38 is connected to the crank 18 and applies a force to the crank 18 in the same direction as the pressing direction of the transmission wheel compression spring 25 with a strength that does not hinder the rotation of the crank 18. An interlocking mechanism for a push-button type tuner characterized by the combination of the two. (2) The crank 18 has a cylindrical protrusion 39 surrounding the pivot 29, and the crank biasing spring 38 is a wire spring engaged with the cylindrical protrusion 39. Range 1
The interlocking mechanism of the push button type tuner described in .