JPS628590Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tuner that performs tuning using, for example, a variable inductance element, and more specifically to a tuner that uses a memory board to preset the tuning frequency. It is related to.

Tuning frequency (tuned frequency) using memory board
A push-button tuner for presetting is well known, as shown in, for example, Japanese Utility Model Publication No. 48-45362. However, this type of tuner is provided with a pair of parallel engaging rods that can obtain an angle corresponding to the amount of movement of the magnetic core of the variable inductance element, and the relationship between the rotational position of the pair of engaging rods and the memory board is Since the structure is such that the tuning frequency is preset, it has been impossible to form it thinly. In order to solve this kind of drawback, a system has been proposed in which the memory board and the variable impedance element are related to each other by a sliding plate, as shown in Japanese Patent Application No. 55-107973, for example.
However, the angle information can be easily stored on the memory board,
Moreover, it was difficult to securely lock the lock.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a preset tuner that can accurately and easily lock a memory board.

To achieve the above object, the present invention will be described with reference to the reference numerals in the drawings showing the embodiments. a sliding plate 14 arranged to move in the direction of;
The sliding plate 14 is pivoted on the fixed part and rotated by an angle corresponding to the amount of movement of the sliding plate 14.
a rotary plate 19 provided with a memory plate engaging portion 22 that engages with the memory plate 31 to be described later; A belt-shaped support plate 35 supported by the base body so as to be movable in the second direction, a pin 36 provided on the support plate 35 for pivotally supporting a memory board 31 (described later), and a locking lever (described later). A pivot shaft 48 provided on the support plate 35 so as to serve as a fulcrum of the rotation plate 46, and a pivot 48 that is pivotally supported by the pin 36 of the support plate 35 and selectively engaged with the memory board engaging portion 22 of the rotation plate 19. A memory board 31 is provided with a rotating plate engaging portion 32 that connects the memory plate 31 to the rotating plate 1.
a return spring 44 that applies a biasing force to the support plate 35 in the direction of separating it from the support plate 9; A lock control plate 55 having a protrusion 57 is disposed such that one end 50 thereof covers the memory board 31 and the other end 51 covers the lock control plate 55, and the one end 5
The pin 36 is inserted into the hole 47 formed at the other end 51, and the tip engaging part 53 of the locking lever 46, which will be described later, is inserted into the notch 49 formed at the other end 51. The plate spring 45 has notches 65 and 66 extending from the center toward the one end 50, and a hole 52, which is pivotally supported by the pivot shaft 48 inserted through the hole 52, and which allows the lock control plate 55 to protrude. 57 , and a lock pressing end 54 that presses the memory board 31 via the leaf spring 45 . A locking lever 46 is inserted into the notch 49 and the tip engaging portion 53 is pressed in the direction of unlocking the memory board 31 by the leaf spring 45, When storing the displacement state of the variable portion of the element 1, the lock control plate 55 is displaced in a direction away from the memory plate 31, and the memory plate 31 is unlocked by the locking lever 46. Board 3
1 in the direction of the rotating plate 19, the memory plate 31 corresponds to the rotation angle of the rotating plate 19, which is determined in accordance with the sliding position of the sliding plate 14. By pushing the lock control plate 55 in the direction of the memory plate 31, the locking lever 46 rotates in the locking direction, and the rotation angle of the memory plate 31 is locked. In addition, when obtaining the displacement state of the variable impedance element 1 corresponding to the memory contents of the memory board 31, the rotation plate 19 is moved by moving the support plate 35 against the return spring 44. relates to a preset type tuner configured such that the rotation angle corresponds to the rotation angle of the memory plate 31 and the sliding plate 14 slides by an amount corresponding to the rotation angle of the rotation plate 19. It is something.

According to the above invention, the following effects can be obtained.

(a) Since the leaf spring 45 is covered by the memory board 31 and the lock control board 55, it is easy to prevent them from falling off.

(b) Since the notches 65 and 66 are provided in the leaf spring 45, even if the locking lever 46 starts rotating in the locking direction, the displacement of one end 50 of the leaf spring 45 in the locking direction is reduced, and the locking is prevented. Lever 4
memory board 3 until lock by 6 is achieved.
1 is not strongly pressed by the leaf spring 45. Therefore, half-lock can be prevented and accurate synchronization can be achieved.

(c) The locking lever 46 has a hole 52 through which the pivot 48 is inserted, so that the locking lever 46 can be prevented from falling off.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 14.

FIG. 1 is a plan view schematically showing the overall structure of a tuner according to an embodiment of the present invention, and FIG. 2 is a front view thereof. As is clear from FIG. 2, this tuner is formed extremely thin. In FIGS. 1 and 2, 1 is a variable inductance element, which is composed of a fixed coil portion 2 and a movable magnetic core 3. In FIG. Reference numeral 4 denotes an electric circuit portion to which the variable inductance element 1 is connected, and this electric circuit portion 4 and the variable inductance element 1 form a tuned circuit 5. Reference numeral 6 denotes a manual tuning shaft, which is engaged with the slider 10 via a gear 7, a fan-shaped gear 8 that meshes with the gear 7, and a crank 9 to which the gear 8 is connected. Although not shown, a gear is provided for converting the rotation of the manual tuning shaft 6 into the rotation of a gear 7 in a direction orthogonal thereto. In addition, a clutch section 11 is used to disconnect the manual tuning mechanism when selecting a channel using the push button.
is provided, and is configured to separate the small gear 7 from the fan-shaped gear 8 during push button selection. In this embodiment, the clutch actuating mechanism operates the clutch portion 1 in a known manner in conjunction with the operation of the push button.
1, however, the gear 7 and the sector gear 8 may be disengaged by pulling or pushing the manual tuning shaft 6.

The crank 9 is rotatable around a shaft 12,
The U-shaped notch at one end engages the pin 13 of the slider 10, and the U-shaped notch at the other end engages the pin 15 of the sliding plate 14. The slider 10 has a guide rod 16 extending in the same direction as the magnetic core 3,
17, so it moves linearly following the rotation of the crank 9.

Since the magnetic core 3 is fixed to the slider 10, when the manual tuning shaft 6 is rotated, this rotational motion is converted into linear motion of the slider 10 and the magnetic core 3 via the gear 7, sector gear 8, and crank 9. The magnetic core 3 is displaced in its axial direction, the inductance value of the inductance element changes, and a desired tuning state is obtained. Further, the displacement of the slider 10 to which the magnetic core 3 is fixed is controlled by the sliding plate 1 via the crank 9.
4, the sliding plate 14 moves in the left-right direction (first direction) guided by the pin 63 inserted into the elongated hole 64, and conversely, when the sliding plate 14 is displaced in the left-right direction, this The crank 9 rotates in accordance with this rotation, and the slider 10 is further displaced in accordance with this rotation.

This tuner tunes to a desired station or frequency using the manual tuning shaft 6, stores this tuning state in the memory board 31 shown in FIG.
It is configured so that the channel can be selected by only operating 8.
Therefore, as will be clear from the description below, the push button 18 drives the sliding plate 14 via the memory board 31, and the value of the variable inductance element 1 changes in accordance with the displacement of the sliding plate 14. The memorized station is selected.

Figures 3 and 4 show the sliding plate 1 during locking.
4 and the push button 18, FIG. 5 is an enlarged view of the state when the lock is released, and FIG. 6 is a partially exploded front view of FIG. 5.
In this drawing, 19 is a first rotating plate,
20 is a second rotating plate. This first rotating plate 1
9, as shown in FIG. 7, the U-shaped engaging portion 21 and the first
The memory plate engaging portion 22 is rotatable about a pivot shaft 24 into which the hole 23 is inserted. The second rotating plate 20 is formed symmetrically with the first rotating plate 19 as shown in FIG. 8, and has a U-shaped engagement portion 25,
It has a second memory plate engaging portion 26 and is rotatable about a pivot shaft 24 inserted into a hole 27 .

A pin 28 is provided on the sliding plate 14, and the pin 28 is inserted into the U-shaped engaging portions 21 and 25 of the first and second rotating plates 19 and 20, respectively, and the pivot 24 is connected to the fixed base plate 30. Therefore, when the sliding plate 14 moves in the first direction (vertical direction) shown by the arrow 29, the rotating plates 19 and 20 follow this and rotate clockwise or counterclockwise. do.

31 is a memory board formed in a fan shape;
As shown in the figure, it has first and second rotating plate engaging parts 32 and 33 that are spaced apart from each other by about 180 degrees, and a pin 36 serving as a pivot is inserted into a hole 34 in the center thereof. ing. Note that the first and second rotating plate engaging portions 32 and 33 are connected to the first and second rotating plates 19 and 20.
In order to reliably engage the memory plate engaging parts 22 and 26 of the memory board, it is formed with a bent part.

The memory support plate 35 is formed as shown in FIG. 10 and is arranged perpendicular to the sliding plate 14. A guide pin 38 is inserted into the elongated hole 37 formed here.
is inserted, and guided by it, arrow 3 is shown in Figure 3.
It is slidable in the second direction (left and right direction) indicated by 9. Note that the guide pin 38 is implanted in the substrate 30. Further, the memory support plate 35 has a spring receiving step portion 40.
A portion 41 protrudes from the case through a hole 42 formed in the case, that is, the substrate 30, and a return spring 44 is installed between the back surface portion 43 and the stepped portion 40 of the substrate 30. Therefore, the memory support plate 35 is always supported by the spring 44 in FIGS. 3 and 4.
In the figure, it is receiving a biasing force in the right direction.

In addition to the memory board 31, the memory support plate 35 includes:
A lock portion 62 for selectively preventing rotation of the memory board 31 is attached. This lock part 62
It consists of a leaf spring 45 and a locking lever 46 for selectively actuating the leaf spring 45. As shown in FIG. 11, the leaf spring 45 has a hole 47 at one end 50 through which the pin 36 of the memory support plate 35 is inserted, and a pivot 48 formed by cutting out the memory support plate 35. It has a cutout part 49 through which the locking lever 46 is inserted and into which the distal end engaging part 53 of the locking lever 46 is inserted, and the other end part 51 is further provided with a pair of notches 65 and 66 extending from right to left in FIG. have As is clear from FIGS. 4 and 5, one end 50 is covered with the memory board 31, and the strips 67 and 68 of the other end 51 are covered with the lock control board 55.
It is covered by the tip strips 69, 70 of. Therefore, this leaf spring 45 has a function of preventing the memory board 31 and the lock control board 55 from falling off. This leaf spring 45 also prevents the locking lever 46 from falling off. Further, as shown in FIG. 6, one end 50 of this leaf spring 45 has a spring action in the direction of moving away from the memory board 31, and the other end 51 has a spring action that moves the leaf spring 45 away from the memory board 31.
Since it has a spring action that biases 6 in the unlocking direction, it also has the function of determining the order of operations at lock-in.

The locking lever 46 is formed of a thick leaf spring that is relatively difficult to deform, as shown in FIGS.
2, and a U-shaped protruding tip engaging portion 53 that engages with the lock control plate 55. As shown in FIGS. 3 to 5, it is supported by a pivot 48 and placed on a leaf spring 45. Also, the tip engaging portion 5
3 is inserted into the notch 49 of the leaf spring 45, as is clear from FIG. is recieving. The width of the hole 52 becomes narrower as it goes to the right as shown in FIG. 48, by moving the pivot 48 to the right, the T-shaped head of the pivot 48 will cover the lever 46, and the neck of the T-shaped part will be inserted into the narrow part of the hole 52. , the lever 46 will not easily fall off the pivot 48. The left end of the lever 46 becomes a lock pressing end 54, which presses the memory board 31 via the leaf spring 45 when the lever is locked, thereby preventing the memory board 31 from rotating.

55 is a lock control plate which, as shown in FIG. The push button 18 is attached to the right end thereof. Attachment to the memory support plate 35 is performed using the protrusion 57 when in the unlocked state shown in FIG.
does not press the tip engaging portion 53 of the lever 46 downward as shown in FIG. 5, but the protruding portion 57 presses the tip engaging portion 53 of the lever 46 downward when it is locked as shown in FIG. . Also, the memory board 3 of the protrusion 57
An inclined surface 71 is provided at the end on the 1 side.

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 31, the lock control board 55 is pulled out to the position shown in FIG. 5 by pulling out the push button 18. As a result, the lever 46 is biased counterclockwise in FIG. 5 by the leaf spring 45, and the locking or pressing of the memory plate 31 by the lock pressing end 54 of the lever 46 is released, allowing the memory plate 31 to freely rotate. become. However, since the rotating plate engaging parts 32 and 33 are provided in the falling state in FIG. The plates 19 and 20 can be freely rotated within a range where no situation occurs in which rotation becomes impossible. On the other hand, as the manual tuning shaft 6 rotates, the magnetic core 3 moves, and a predetermined tuning state, that is, tuning is achieved. And magnetic core 3
The sliding plate 14 also moves in response to the movement of the magnetic core 3, and the position of the sliding plate 14 corresponding to the position of the magnetic core 3 is obtained. Since the first and second rotating plates 19 and 20 are engaged with the sliding plate 14 through pins 28, the rotation angle of the rotating plates 19 and 20 corresponds to the position of the sliding plate 14. can get.

In the setting state as described above, push button 18 and lock control plate 55 are pushed to the left in FIGS. 3 to 5.
At this time, when the left end of the lock control plate 55 is moved under the leaf spring 45 and the lever 46, the frictional resistance given by the spring action etc. is set to be larger than the force of the return spring 44, so the lock control plate 55 memory support plate 3 before restricting the rotation of memory plate 31.
5 moves to the left against the return spring 44, and the rotating plate engaging portions 32 and 33 of the memory board 31 engage the rotating plate 1.
The memory plate 31 is engaged with the memory plate engaging portions 22 and 26 of 9 and 20 as shown in FIG. If the push button 18 is pressed further, the lock control plate 55 moves, and the protrusion 57, which has an inclined surface 71 that gradually becomes higher from left to right, moves the lever 46 clockwise in FIGS. 4 and 5. and turn lever 4.
The pressing end 54 of 6 presses the memory board 31 through the leaf spring 45 and locks it in that position. Further, the lock control plate 55 is pressed in the direction of the memory support plate 35 by the leaf spring 45 and the lever 46, and is elastically held in that position. The memory plate 31 is connected to the rotating plates 19 and 2.
0 and then release the push button 18, the memory support plate 35 returns to the position shown in FIGS. 3 and 4 by the action of the return spring 44, and the storage on the memory plate 31 is completed.

By the way, when the lever 46 is pressed against the inclined surface 71 and starts to rotate clockwise as shown in FIG. Elastically deforms downward.
As a result, one end 50 of the leaf spring 45 is connected to the memory board 3.
Press 1. If this pressure is strong, the memory board 31 will be in a locked state, that is, a half-locked state. Since it is necessary to accurately memorize that the memory plate 31 is locked at the point where the stepped portion 59 of the lock control plate 55 abuts against the stopper 58, a half-locked state by the leaf spring 45 is not preferred. However, in this embodiment, the notch 6
5 and 66, when the lever 46 is pressed by the protrusion 57 of the lock control plate 55, the portion sandwiched between the pair of notches 65 and 66 mainly deforms downward as shown in FIG. Deformation of the strips 67, 68 is reduced. For this reason, the strength of the pressing of the memory board 31 by the one end 50 of the leaf spring 45 is also weakened, and a half-locked state due to deformation of the leaf spring 45 hardly occurs.

Note that when the rotating plates 19, 20 and the memory plate 31 are engaged, the first rotating plate 19 rotates in the clockwise direction indicated by the arrow 60 in FIG. Since it rotates in the counterclockwise direction shown by the arrow 61, the pin 28
is sandwiched between the U-shaped engaging portion 21 of the first rotating plate 19 and the U-shaped engaging portion 25 of the second rotating plate 20, ensuring accurate engagement with no gap. holds true.

Since the push button type preset sections shown in FIGS. 3 and 4 are provided in the same number as the push buttons 18, it is possible to set a plurality of tuning frequencies in advance.

As shown in FIGS. 3 and 4, when selecting a channel by operating the push button 18 after storing the tuned frequency in the memory board 31, the memory support plate 55 is used together with the push button 18.
is pushed in to engage the memory plate 31 with the first and second rotating plates 19 and 20. Since it had been receiving a different frequency until now, the rotating plates 19 and 20 were not connected to the sliding plate 1.
4, the memory plate 31 engages with the rotating plates 19, 20, so that the rotating plates 19, 19, 20 move to the rotating angle corresponding to the memory plate 31. 20 rotates, the sliding plate 14 moves following the rotation of the rotating plates 19 and 20, the crank 9 rotates following the sliding plate 14, and the magnetic core 3 further moves. The desired state of tuning is obtained.

At this time, a clutch drive mechanism (not shown) operates in conjunction with the operation of the push button 18, and the clutch portion 11 operates to separate the gear 7 from the fan-shaped gear 8, regardless of the gear mechanism of the manual synchronization shaft 6. Channel selection is made using push button 18. After selecting the station, press button 18.
When the push button 18 is released, the return spring 44
The clutch portion 11 is then returned to its non-operating state. Therefore, the manual tuning shaft 6 and the slider 10 are coupled by a gear, and the slider 10 does not easily move due to vibrations or the like.

As is clear from the above, in this embodiment, the notches 65 and 66 are provided in the leaf spring 45, so that a half-locked state is prevented from occurring during the locking operation.

In addition, the leaf spring 45 is connected to the memory board 31, the lever 46,
Since it is associated with the lock control plate 55, it is possible to easily prevent these from falling off.

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, a configuration may be adopted in which only one of the rotating plates 19 and 20 is provided. It is also applicable to the case where a variable resistor or a variable capacitor is used in place of the variable inductance element 1. In addition, the magnetic core 3 is directly coupled to the sliding plate 14,
It is also applicable to a case where the sliding plate 14 and the magnetic core 3 move in the same direction.

[Brief explanation of the drawing]

The drawings show a preset type tuner according to an embodiment of the present invention; FIG. 1 is a plan view showing a part of the tuner, FIG. 2 is a front view of the tuner, and FIG. 3 is a view taken along the line - in FIG. FIG. 4 is a sectional view showing a part of the part corresponding to the - line in FIG. 3, and FIG. 5 is a part corresponding to FIG. 4 showing the unlocked state. An enlarged cross-sectional view of
Fig. 6 is a partially exploded front view of Fig. 5, and Fig. 7 is a partially exploded front view of Fig. 1.
FIG. 8 is a plan view of the second rotating plate, FIG. 9 is a plan view of the memory board, FIG. 10 is a plan view of the memory support plate, and FIG. 11 is a plan view of the leaf spring. Plan view,
FIG. 12 is a plan view of the lever, FIG. 13 is a plan view of the lock control plate, and FIG. 14 is a plan view showing the engagement relationship between the memory plate and the rotating plate. In the symbols used in the drawings, 1 is a variable inductance element, 14 is a sliding plate, 19 is a first rotating plate, 20 is a second rotating plate, 31 is a memory plate, and 44 is a return plate. 45 is a leaf spring, 46 is a lever, 55 is a lock control plate, and 65 and 66 are notches.

Claims (1)

[Scope of utility model registration request] Tuning circuit 5 including variable impedance element 1
, a sliding plate 14 arranged to move in a first direction in conjunction with the movable part of the variable impedance element 1 , and a sliding plate 14 pivotally supported by the fixed part
The memory plate 31, which will be described later, is engaged with the sliding plate 14 so as to rotate by an angle corresponding to the amount of movement of 4.
a rotary plate 19 provided with a memory plate engaging portion 22 that engages with the rotary plate 19; a belt-shaped support plate 35 supported by the base;
A pin 36 provided on the support plate 35 to pivot a memory board 31 (described later), a pivot 48 provided on the support plate 35 to serve as a fulcrum for a locking lever 46 (described later), and the support plate a memory board 31 which is pivotally supported by the pins 36 of 35 and is provided with a rotating plate engaging part 32 that selectively engages with the memory plate engaging part 22 of the rotating plate 19; A return spring 44 applies a biasing force to the support plate 35 in the direction of separating it from the rotation plate 19, and a return spring 44 is formed to slide along the support plate 35 and rotates a locking lever 46 to be described later. A lock control plate 55 having a protrusion 57 for movement, and one end 50 thereof covering the memory board 31 and the other end 51 covering the lock control plate 55 and formed at the one end 50. The pin 3 is inserted into the hole 47.
6 is inserted into the notch 49 formed at the other end 51, a tip engaging portion 53 of a locking lever 46 (to be described later) is inserted, and a notch 65 is formed from the other end 51 toward the one end 50. , 66, and a hole 52.
The lock is pivoted on the pivot shaft 48 inserted through the lock control plate 2, has a tip engaging portion 53 that engages with the protrusion 57 of the lock control plate 55, and presses the memory board 31 via the leaf spring 45. It has a pressing end 54, and the tip engaging portion 53 is inserted into the notch 49 of the leaf spring 45, and the tip engaging portion 53 is pressed by the leaf spring 45 in the direction of unlocking the memory board 31. and a lock lever 46 for displacing the lock control plate 55 in a direction away from the memory plate 31 when storing the displacement state of the variable portion of the variable impedance element 1 in the memory plate 31. By moving the memory plate 31 in the direction of the rotating plate 19 with the memory plate 31 unlocked by the locking lever 46, the memory plate 31 is moved toward the sliding plate 1.
rotated to a rotation angle corresponding to the rotation angle of the rotation plate 19 determined corresponding to the sliding position of No. 4;
By pushing the lock control plate 55 toward the memory plate 31, the lock lever 46 is
is rotated in the locking direction to lock the rotation angle of the memory plate 31, and when obtaining the displacement state of the variable impedance element 1 corresponding to the stored content of the memory plate 31, the return spring 44 is rotated. By moving the support plate 35 against the rotation angle, the rotation plate 19 becomes a rotation angle corresponding to the rotation angle of the memory board 31, and the sliding plate 14 moves at a rotation angle of the rotation plate 19. A preset tuner configured to slide by an amount corresponding to the corner.