JPS6043687B2 - Rotary preset tuner - Google Patents

Description

[Detailed description of the invention] The present invention relates to rotary preset tuners.

Rotary preset tuners are mainly used in car radio tuners. The tuner rotates a preset drum by dynamically rotating a knob protruding from an operation panel, and selects broadcast stations stored on the drum one after another. FIG. 1 is a front view showing the main parts of a conventional rotary preset tuner. In the figure, 1
is a preset drum. The preset drum 1 includes a setter 101 for positioning the core slider 3 carrying the ferrite core 2, and a threaded rod 10 screwed into the setter 101.
2, and a gear 103 that transmits rotational driving force to the preset drum 1. Note that 4 is a guide rod that guides the core slider 3 that moves up and down, 5 is a coil, and 6 is a gear that is interlocked with a knob protruding from the operation panel, and is meshed with a gear 103 for rotating the preset drum. 7 is a spring that pushes up the core slider 3; 8 is an arm of an operating lever that operates the core slider 3; 9 is a gear; 104 is a crown gear attached to the tip of the threaded rod 102; 105
is a cam plate for positioning, and although not shown in the figure, a roller is brought into elastic contact with it.

The channel selection operation of the rotary preset tuner as described above is performed as follows.

When the knob protruding from the operation panel is rotated, the gear 6 rotates and the preset drum 1 begins to rotate in either direction.

At this time, although not shown in the figure, since the roller that is in elastic contact with the cam plate 105 rides on the cam ridge of the cam plate 105, the arm 8 of the operating lever that is linked to the pivot lever that pivots the roller rapidly descends in the direction of the dotted arrow, pushing down the core slider 3 against the spring 7 to the lowest position. Through this operation, the preset setter 101 provided on the preset drum 1 and the end portion 301 of the core slider 3 are disengaged, and the preset drum 1
rotates by one nodal movement, and the roller that is in elastic contact with the cam plate 105 slides down to the next cam valley and comes to rest at the next position of the preset drum 1. When the preset drum 1 comes to rest,
The arm 8 of the actuating lever quickly returns to its original position. Therefore, the core slider 3 also rises due to the restoring force of the spring 7, and the end portion 301 of the core slider 3 contacts the setter 101 which has been preset to the next preset position, thereby positioning the ferrite core at a predetermined position within the coil 5. , select the memorized broadcast station. To preset the desired broadcast station, pull the knob protruding from the operation panel toward you.

By this operation, the clutch connecting the knob and the gear 6 is removed, and the gear 9 moves to the dotted line position and is screwed into the crown gear. And when you turn the knob,
The threaded rod 102 rotates, and the setter 101 rotates the threaded rod 102.
, move the core slider 3 upward or downward along the line, and finally, Hue! Move light core 2.
Therefore, the tuning frequency changes and a desired broadcasting station can be tuned. When the desired broadcast station is received and the knob is pushed in, the gear 9 returns to the solid line position, the clutch is engaged, and the knob and gear 6 are connected. By the way, since the conventional rotary preset tuner as described above does not have a manual tuning operation mechanism, it can only receive broadcast stations that have been stored in the preset drum in advance.

Pull out the knob to set the preset state, and turn the knob Z.
If you change the channel, it is possible to perform a manual tuning operation, but if you perform this operation, the broadcast station stored in that channel will disappear. The present invention is a novel invention that improves the conventional drawbacks as described above, and its purpose is to
The object is to add a manual tuning operation mechanism to a conventional rotary preset tuner. Next, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 2 and 3, 10 is a frame.

A preset drum 1 is rotatably supported in the middle of the frame 10. 11 is a rotation axis.

The rotating shaft 11 is rotatably and longitudinally movably supported on the frame 10. 12 is a bearing.

A knob 111 is attached to one end of the rotating shaft 11, and gears 112 and 113 are attached to the other end. Further, a click cam 114 is attached to the middle of the rotating shaft 11. 13 has a ball 131 at the tip,
This is a joint member that presses this in the direction of the rotating shaft 11.

A gear 14 is loosely fitted onto the rotating shaft 11 and meshes with the gear 103 of the preset drum 1.

Reference numeral 15 designates a clutch member, and in the state shown in FIG.

Reference numeral 16 denotes a U-shaped core slider, which is guided by the guide rod 4 and supported so as to be movable in the vertical direction.

As shown in FIG. 4, the core slider 16 has three ferrite cores 2 attached below, and a guide rod 16 in the center.
1 is attached, and further has an arm 162 at the upper end.
A positioning plate 17 is movable in the vertical direction on the core slider 16 while being guided by a guide rod 161 provided on the core slider 16.

The positioning plate 17 has an operating protrusion 171 and a setter 10.
A contact plate 172 that comes into contact with the second and third contacts is formed.
As clearly shown in the figure, a tension spring 18 is stretched between the positioning plate 17 and the arm 162 of the core slider 16.
Therefore, it is always located above the core slider 16. 8
01 (shown in the third diagram) is a lever that moves in the vertical direction together with the arm 8, and tension springs 19 and 20 are stretched between the lever 801 and the frame 10 and between the lever 801 and the core slider 16, respectively.

21 is a manual drive body.

As shown in FIG. 5, the manual drive body 21 is bent into a U-shape, has a gear part 211 on one side, and a pivot rod 21 in the center.
2 is installed. The pivot rod 21 is inserted into the grooves 221 and 231 provided in the arms 22 and 23 extending from the frame.
2, and is pivoted to the frame 10 by being pulled by a tension spring 24 stretched between the frame 10 and the pivot rod 212. Reference numeral 25 denotes a shaft rod rotatable in the frame 10 and movable in the longitudinal direction, and biased toward the left in FIGS. 2 and 6 by a spring 26.

A cam body 251, a large-diameter gear 252, and a small-diameter gear 253 are attached to the shaft rod 25. Note that the gear 252 is always in mesh with the gear 112. 27 is a preset knob.

The preset knob 27 is a rotating shaft 2 that is pivotally supported on the frame 10.
It is attached to 8. As clearly shown in FIG. 7, a manual operation plate 2 is provided at the end of the rotation shaft 28.
9 is installed. The manual operation board is provided with two arms 291, 292 and a protrusion 293. In FIG. 6, reference numeral 30 denotes an L-shaped lever, which is pivotally attached to the frame 10, and one end 301 of which is attached to the groove 111 of the rotating shaft 11.
The other end 302 is engaged with the arm 292 of the manual operation plate 29, as shown in FIG. Next, the operation of the rotary preset tuner having the above configuration will be explained.

◎ Preset broadcasting station selection operation When the knob 111 is rotated from the state shown in Figures 2 and 3, the rotational force is transmitted from the rotating shaft 11 to the clutch member 15 to the gear 14 to the gear 103 and to the preset drum. 1 begins to rotate, the arm 8 and lever 801 begin to descend rapidly.

The arm 8 then pushes down the operating protrusion 171 of the positioning plate 17. Therefore, the positioning plate 17 also moves down, and the core slider 16 connected to it by the tension spring 18
also descends, and they eventually reach the lowest position. When preset drum 1 rotates and reaches the next resting position,
The arm 8 and the lever 801 return upward, the core slider 16 and the positioning plate 17 rise due to the tensile force of the tension spring 20, and the contact plate 172 moves to the preset drum 1.
The core slider 16 is set to a new position by contacting the setter 101 of the drum 1, and the broadcasting station stored in the preset drum 1 in advance is selected. ◎Manual channel selection operation From the state shown in Figures 2 and 6, pull out the knob to the dotted line position.

As a result, the rotating shaft 11 moves to the left, the clutch member 15 comes out of the gear 14, and the coupling is broken, and the gears 112 and 113 also move to the left, causing the gear 14 to disengage.
3 contacts the arm 291 of the preset operation plate 29.
In this state, the gear 113 does not mesh with the crown gear 104 and is in a free state. Note that when the rotating shaft 11 moves to the left, the cam 114 engages the ball 13 of the joint member 13.
It comes in contact with 1, lifts it up, and passes, so it's done in a click-like manner. Gear 252 is biased by spring 26 and is always in contact with gear 113, so gear 113
When the gear 252 moves to the left, the gear 252 also moves to the left following this movement. Therefore, the shaft 25 also moves to the left, and the gear 253 meshes with the gear portion 211 of the manual drive body 21. When the knob 111 is rotated from this state, the rotational force is transferred from the rotating shaft 11 → gear 112 → gear 252 → gear 2.
53 - gear portion 211 - transmitted to manual drive body 21 .

When the manual drive body 21 rotates counterclockwise in FIG. 3, the core slider 16 and the positioning plate 17 descend together to change the position of the ferrite core 2 and change the tuning frequency. Further, when the manual drive body 21 rotates clockwise in FIG. 3, the core slider 16 rises and changes the position of the ferrite core 2 as described above. Note that when the core slider 16 rises from the state shown in FIG. 3, the positioning plate 17 comes into contact with the setter 101 and cannot rise. Therefore, only the core slider 16 rises while the tension spring 18 expands. Note that if the manual drive body 21 continues to rotate the main knob 111 after the manual drive body 21 has completely rotated in either direction, the manual drive body 21 is pressed by the rotation of the gear 253 and the gear 2
The gear 253 and the gear part 21 move in the direction away from the gear 53.
1 and. is disengaged, the gear 253 rotates freely, and damage to the manual tuning mechanism is avoided.

Note that at this time, the pivot rod 212 of the manual drive body 21 moves in the direction of coming out of the grooves 221 and 231. When the rotation of the knob 111 is stopped, the manual drive body 21 is pulled back to its original position by the force of the tension spring 24, and the gear 253 and the gear portion 211 mesh again. ◎Preset operation Rotate the knob 111 exposed on the front of the operation panel from the states shown in Figures 2 and 6 to rotate the preset drum 1, select the channel you want to preset, and then rotate the preset knob 27. The rotation shaft 28 is
Rotate in the direction of arrow A in the figure.

Therefore, the preset operation plate 29 also rotates in the same direction. This causes arm 292 to press against the other end 302 of lever 30, causing lever 30 to rotate clockwise in FIG. One end 301 of the lever 30 moves the rotating shaft 11 leftward from the states shown in FIGS. 2 and 6. As the rotating shaft 11 moves, the clutch member 15 and the gear 14 are disengaged, and the gear 113 also moves to the left.
At this time, since the preset operation plate 29 has been rotated, the arm 291 has escaped upward. Therefore, the gear 113 moves fully to the left and meshes with any one of the crown gears 104 of the preset drum 1 (the crown gear at the preset position). On the other hand, due to the rotation of the preset operation plate 29, the protrusion 293 is moved to the cam body 2.
Press down firmly on the slope of 51.

Therefore, the shaft 25 moves to the left from the state shown in FIG. 8, and as shown in FIG.
1 and the gear 253 are disengaged. From this state, when the knob 111 is rotated, the gear 1 attached to the rotating shaft 11
13 rotates the crown gear 104 and rotates the threaded rod 102.

When the threaded rod 102 rotates, the setter 101 also moves upward or downward. setter 101
When the setter 101 moves upward, the positioning plate 17 and the core slider 16 are moved upward by the tensile force of the tension spring 20.
The position of the ferrite core 2 is changed by moving upward in accordance with the ferrite core 2. When the setter 101 moves downward, the setter 101 pushes down the positioning plate 17. Since the tension spring 18 has a stronger tensile force than the tension spring 20, when the positioning plate 17 is lowered, the tension spring 18 has a stronger tension than the tension spring 20.
The positioning plate 17 moves the core slider 16 against a tensile force of 0.
Follow and descend. In this way, setter 101
After moving and stopping at the desired position, turn knob 11.
Push in 1 to return to the state shown in Figure 2. When presetting a different channel, it is sufficient to rotate the knob 111 from the state shown in FIG. 2 to rotate the preset drum 1 to a predetermined position, select a channel, and then perform the presetting operation as described above.

In the above embodiment, the preset knob 27 is rotated when performing the preset operation, but it is not necessary to use such an operation mechanism, and it is sufficient to rotate the preset operation plate 29 during the preset operation. ,
For example, a wire may be connected to the preset operation plate 29, led out in the direction of the knob 111, and a button may be attached to the tip of the wire, and the preset operation plate 29 may be rotated by pulling the button during the preset operation. , and may also be rotated by other configurations.

As explained in detail above, the present invention provides a rotary preset tuner with a manual drive body that transmits the rotational force of the rotating shaft to the core slider to move the core slider. In addition to being able to move the core slider by moving the setter, it has become possible to move the core slider using a mechanism that is completely separate from the setter movement.

Therefore, it has become possible to perform manual tuning without destroying the contents stored in the preset drum.

[Brief explanation of drawings]

FIG. 1 is a front view showing the main parts of a conventional rotary preset tuner, and FIGS. 2 to 9 are views showing an embodiment of the present invention. FIG. figure,
Figure 4 is a perspective view of the core slider and positioning plate, Figure 5 is a perspective view of the manual drive body, Figure 6 is a top view, Figure 7 is a perspective view of the preset operation plate, Figures 8 and 9 are FIG. 6 is an explanatory diagram of an operation during a preset operation. In the figure, 1 is a preset drum, 101 is a setter 102
1 is a threaded rod, 103 is a gear, 104 is a crown gear, 10
5 is a cam plate, 2 is a ferrite core, 3 is a core slider,
4 is a guide rod, 5 is a coil, 6 is a gear, 7 is a spring, 8 is an arm, 801 is a lever, 9 is a gear, 10 is a movement, 11
is a rotating shaft, 111 is a knob, 112 and 113 are gears,
114 is a cam, 115 is a groove, 12 is a bearing, 13 is a joint member, 131 is a ball, 14 is a gear, 15 is a clutch member, 16 is a core slider, 161 is a guide rod, 162 is an arm, 17 is a positioning plate, 171 is an operating projection, 172 is a contact plate, 18 to 20 are tension springs, 21 is a manual drive body, 211 is a gear portion, 212 is a pivot rod, 22 is an arm, 221 is a groove, 23 is an arm, 231 is a groove, 24 is a tension spring, 25 is a shaft rod, 251 is a cam body, 252 and 25
3 is a gear, 26 is a spring, 27 is a preset knob, 28
is the rotation axis, 29 is the preset operation panel, 291 and 292
is an arm, 293 is a protrusion, 30 is a lever, 301 is one end, and 302 is the other end.

Claims (1)

[Claims] 1. A preset drum having a plurality of movable setters; a rotating shaft that rotates the preset drum at a first position and rotates a threaded rod to which the setters are screwed together at a second position to move the setters; A rotary preset tuner that has a core slider that holds a ferrite core that moves in a coil, is guided by a guide rod, and is positioned by the setter, and is movably held by the core slider and is held by the core slider and a spring. A positioning plate coupled to the setter and a member for presetting rotate the rotating shaft at one position to a first position and a second position.
a preset operation plate that is locked at a third position between the two positions and moves the rotating shaft to the second position when moved from the one position to the other position;
1. A rotary preset tuner comprising: a manual drive body that transmits the rotational force of a rotating shaft to a core slider to move the core slider at the position of the rotary preset tuner.