JPS5827558Y2 - Display drive device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a display drive device, and is applied to, for example, a tuning tuning device, in which a speed increasing mechanism for transmitting the rotation of a tuning operation shaft to a flywheel at an increased speed is provided outside the flywheel. It is an object of the present invention to provide a device whose overall size can be reduced by arranging it inward from the diameter.

Conventional display drive devices are applied to tuning devices such as radio receivers, and a flywheel is directly connected to the tuning operation shaft to allow the display pointer to move smoothly and inertially. According to this, the flywheel rotates integrally with the synchronized operating shaft at the same rotational speed, so
To obtain the required inertial force, a relatively large flywheel must be used, resulting in a large configuration, heavy weight, high cost, and inability to be applied to small, lightweight equipment. there were.

The present invention eliminates the above-mentioned drawbacks, and each embodiment thereof will be described below with reference to the drawings.

FIG. 1 is a front view of one embodiment of the display driving device according to the present invention, and FIG. 2 is a partially cutaway side view of the first embodiment of the tuning operation mechanism.

In Figure 1, 1 is a synchronized operation mechanism, and the pulley 3 of the synchronized operation shaft 2
The thread 4 is wound 2 to 3 times.

This thread 4 is further wound around a pair of pulleys 51 and 52 and a pulley 7 coaxial with the variable condenser 6 to form a loop as shown in the figure. The display pointer 8 is fixed in a position corresponding to the position (not shown).

Therefore, by rotating the synchronized operating shaft 2 by a predetermined amount in any direction, the thread 4
By moving , the display pointer 8 is driven together with the electric stove to perform tuning and display the scale.

At this time, as the operating shaft rotates 20 times, the flywheel 9 coaxially rotates, and its inertial rotational force drives the display pointer 8 in a flat and inertial manner, but in the present invention, the entire device is rotated. In order to make the flywheel 9 smaller than usual due to size constraints, the operating shaft 2 and the flywheel 9 are arranged coaxially and separately, as will be described later. The above-mentioned required inertial rotational force is obtained by increasing the speed of 20 rotations at a predetermined speed increasing ratio.

Note that 11 is a casing that houses the flywheel 9.

The size of the flywheel 9 and the speed increasing ratio will be discussed below.

In general, the equation for the kinetic energy of a rotating body is W=Kichi■ω
2 W: energy of rotational motion ■ I: moment of inertia around the axis ω: angular velocity; if the rotating body is a disk, m: weight of the disk (r: radius of the disk).

Rewriting this equation (S: Specific gravity of the disk T: Thickness of the disk In the above equation, the only variable is Tr4ω2, so if the values of T and r become 7. and VbK, respectively, (however, (Ignoring the increase in friction loss) If the energy W is kept constant, the value of - becomes 〆;〒7.

If a-4 and b-2 are used, the value of ω will be 4X2' = τ = 8 times.

Therefore, if the rotating body is made smaller and its radius and thickness are reduced to h, its weight will be 1/16, but if its angular velocity is increased by 8 times, it will generate the same amount of energy as the original energy. I understand that.

Therefore, in the present invention, the above-mentioned 6J-shaped flywheel 9 is rotated at an increased speed of approximately 6 to 12 times the operating shaft 200 revolutions.

Each embodiment of the tuning operation mechanism 1 will be described below.

FIG. 2 shows a first embodiment of the tuning operating mechanism.

This synchronized operation mechanism 11 uses a planetary gear mechanism 101 to increase the speed of the flywheel 9.

The casing 11 includes front and rear casings 1h, 11
2, the front casing 111 has an internal gear 1 on the inner periphery.
ha (number of teeth Zl) and has 12 mounting screws on the front.
The operating shaft 2 is supported through the arm member 13 fixed to the operating shaft 2, and one or more planetary gears 15 (22 teeth) are supported by the arm member 13 fixed to the operating shaft 2 and its fixed shaft 14.

The rear casing 112 also has a sun gear 17 (
A flywheel 9 integral with the number of teeth Z3) is supported.

In the above configuration, the planetary gear 15 meshes with the internal gear 111a and the sun gear 17 to constitute the planetary gear mechanism 101.

During tuning, when the tuning operation shaft 2 is rotated once, the arm member 13 is rotated once, but at this time, the planetary gear 15 is rotated (-'/Z, +1) around the shaft 14. (indicating reversal) sun gear 17 or flywheel 9 is (2'/
z + i ) rotate (however, LZI>z3).

In this way, although the flywheel 9 is small, the synchronized operation shaft has a rotation ratio of (1,, /Z, + 1
) is increased in speed by two steps and rotates in the same direction as the synchronized operating shaft 2 to produce the above-mentioned required inertial rotational force.

When you release your hand from the operating shaft 2, the operating shaft 2 continues to rotate due to the inertial rotational force, but at this time, for each rotation of the flywheel 9, the operating shaft 2 is rotated by the reciprocal of the speed increasing ratio. The display pointer 8 is decelerated by (1/(Zl/Z3+1) 3 rotations and rotated inertia), and the display pointer 8 is moved flat and inertially by that amount.

FIG. 3 shows a second embodiment of the tuning operation mechanism, and the same parts as those in FIG. 2 are given the same reference numerals and their explanations will be omitted.

(The same applies to the following figures) This mechanism 12 uses a fixed gear mechanism 102 to increase the speed of the flywheel 9.

In the figure, the casing 11 is composed of three casings 111 to 1.
13, the front casing 111 has a gear 21 (number of teeth 24) fixed to the operating shaft 2 supported thereon, and gear parts 23a and 23b (number of teeth Z5゜Z, respectively) to the fixed shaft 22.
6) is supported by the gear 23.

The intermediate casing 113 has gear parts 24a, 24b (
A gear sleeve 24 is supported on the fixed shaft 25, and gear parts 26a, 26b (each have a number of teeth Z) are supported on the fixed shaft 25.
9. Z10) is supported by a gear 26.

Further, the rear casing 112 supports a flywheel 9 integral with a gear 28 (211 teeth) on a fixed shaft 27.

Regarding the above configuration, as shown in the figure, each gear 21, 23,
24, 26, and 28 are meshed sequentially.

Therefore, when the tuning shaft 2 rotates once, the gear 28, that is, the flywheel 9 moves in the same direction as the tuning shaft 2 (Z4,
Z6, Z8, z10/Z5, Z7, Z9
.

zll) rotation (however, Z4>Z5, Z6>Z7, Zs
>Z9, Z to )Zo).

Thus, as in the first embodiment, the flywheel 9 is rotated at four speeds with the above speed increasing ratio to smoothly generate the required inertial rotational force.

When the user releases the operating shaft 2, the operating shaft 2 is decelerated by the flywheel 9 at a reduction ratio that is the reciprocal of the speed increasing ratio, and is caused to smoothly rotate inertia.

FIG. 4 shows a third embodiment of the tuning operation mechanism.

This mechanism 13 uses a friction wheel mechanism 103 to increase the speed of the flywheel 9.

In the figure, in the front casing 111 of the casing 11,
One or more friction wheels 31 (radius r1 of the ring 31a) having a friction wheel ring 31a made of neoprene rubber or the like are fixed to the operating shaft 2 supported thereon.

Further, a friction wheel 34 having a friction wheel cylinder 34a and a friction wheel ring 34b (each having a radius rz-r3) is supported on a fixed shaft 33 of a pair of arm members 32 fixedly installed across the front and rear casings 111° and 112. Ru.

Further, the rear casing 112 has a friction wheel portion 9a (
A flywheel 9 having a radius r4 ) is supported.

Note that 36 is a flywheel holding plate.

In the above configuration, the friction wheels 31, 34 and the flywheel 9 are interlocked.

Therefore, when the tuning operation shaft 2 is rotated once, the flywheel 9 moves in the same direction as the tuning operation shaft 2 (rl).

r3/r2, r4) rotation (rl) r2-
rs>r4).

Thus, as in each of the embodiments described above, the flywheel 9 is rotated at two speeds at the speed increase ratio described above to smoothly generate the required inertial rotational force.

Also, when removing the rotation regulating force of the operating shaft 20, the operating shaft 2
is decelerated by the flywheel 9 at a reduction ratio that is the reciprocal of the above-mentioned speed increase ratio, and is caused to rotate by inertia.

In addition to the above configuration, the pair of arm members 32 may be configured to be constantly pressed in the axial direction of the operating shaft 20 by a spring member or the like.

FIG. 5 shows a fourth embodiment of the tuning operation mechanism.

This mechanism 14 uses a pulley mechanism 104 to increase the speed of the flywheel 9.

In the figure, in the front casing 111 of the casing 11, a pulley 41 (radius r5) is fixed to the operating shaft 2 supported therein, and pulley portions 43a and 43b (radii r6 and r7, respectively) are fixed to the fixed shaft 42. A pulley 43 having a diameter is supported.

In the rear casing 112, a flywheel 9 having a pulley portion 9b (radius rs) is supported on a fixed shaft 44.

In the above configuration, a V-belt 45 is placed between the pulley 41 and the pulley part 43a, and between the pulley parts 43b and 9b, respectively, and the ascending pulley 41, 43 and the flywheel 9 are sequentially interlocked with these.

Therefore, when the tuning shaft 2 is rotated once, the flywheel 9 moves in the same direction as the tuning shaft 2 (r5r7/r6, r
s) Rotate (however, rs>r6.rl>rs).

In this way, similarly to the above embodiment, the flywheel 9 is rotated at two speeds at the above speed increase ratio to smoothly generate the required inertial rotational force.

When the operator releases his/her hand from the operating shaft 2, the operating shaft 2 is decelerated by the flywheel 9 at a reduction ratio that is the reciprocal of the above-mentioned speed increase ratio and is caused to rotate inertia.

In each of the above embodiments, the flywheel 9 and the synchronized operating shaft 2 each have two speed increasing mechanisms (planetary gear mechanism 101, fixed gear mechanism 102, friction wheel mechanism 103, and pulley mechanism 104).
The speed increasing mechanism is arranged coaxially with each other by increasing the speed in two or four stages, and since the speed increasing mechanism is disposed approximately toward the center from the outside diameter of the glass wheel 9, the overall size can be reduced, and the speed increasing mechanism can be made smaller. Since the flywheel is rotated at high speed by using a multi-stage speed increase mechanism, a large inertial rotational force can be applied to the flywheel 9, and the display pointer 8 can be moved quickly.

Furthermore, the diameter of the flywheel 9 can be reduced accordingly, and the overall size can be further reduced.

Additionally, since the flywheel 9 and the multi-stage speed increasing mechanism are installed inside the casing, dust etc. do not adhere to the rotation transmission area, the flywheel rotates 90 times cleanly, and can withstand years of use. Furthermore, since the synchronized operating shaft 2 and the flywheel 9 both rotate in the same direction, together with the fact that the flywheel 9 is provided inside the casing, the air inside the casing is transferred to the flywheel 9 from 200 rotations of the synchronized operating shaft.
Since the flow follows the direction of rotation of the flywheel 9, there is an effect that the air resistance experienced by the flywheel 9, which has been increased in speed, is relatively small.

In the above embodiment, the tuning operation shaft 2 is provided at the center position of each tuning operation mechanism 11 to 14.
1 to 14 were directly driven via a speed increasing mechanism, but the invention is not limited to this, and the pulley section located at the center position may be driven indirectly via a string by a synchronized operating shaft located eccentrically from the pulley section. Alternatively, the center position pulley portion may be driven by an imaginary synchronized operating shaft coaxial with the center position pulley portion.

FIG. 6 shows an embodiment of the present invention, in which the same parts as those in FIG.

The tuning operation shaft 21 consists of only a tuning operation section and a pulley section 31, and the thread 4 is wound around the pulley section 31 two to three times.

Further, the intermediate shaft 22 protruding from the center of the tuning operation mechanism 1' has a shape in which the tuning operation part at the tip is removed compared to the tuning operation shaft 2VC, and its pulley part 32 (in FIGS. 2 to 5) Similarly, the thread 4 stranded on the operating shaft 21 is wound two to three times around the pulley 3 (corresponding to the pulley 3).

Therefore, by rotating the tuning operation shaft 21 and moving the thread 4, the intermediate shaft 22 is rotated, and tuning is performed in exactly the same manner as in the above case.

According to this, the tuning operation mechanism 1' can be freely disposed at any desired location separately from the tuning operation shaft 21, which facilitates design, saves space, saves space, and eliminates unnecessary space. It is also possible to increase or decrease the speed between the pulley portions 31 and 32 depending on the situation.

In each of the above embodiments, the display pointer 8 is driven by the thread 4, but the present invention is not limited to this, and a film having a display may be driven to run, or a drum or disk having a display may be driven. It may also be driven to rotate.

As described above, according to the display drive device of the present invention, in the device that drives the display member together with the tuning mechanism by the rotation of the tuning operation shaft, the flywheel rotates in conjunction with the rotation of the tuning operation shaft, and the tuning operation shaft is rotated. Rotate the operating shaft at least 2
A rotation transmission mechanism is provided in the casing to increase the speed in stages and transmit the inertial rotation of the flywheel to the synchronized operating shaft, and the flywheel is coaxial with the synchronized operating shaft. Moreover, since the rotation transmission mechanism is disposed approximately toward the center from the outer diameter of the flywheel, it has the following advantages 1 to 5.

■ The synchronized operating shaft and flywheel are coaxially configured,
In addition, since the rotation transmission mechanism is disposed approximately in the center direction from the outer diameter of the flywheel, the overall axial outer shape is restricted simply by the outer diameter of the flywheel, allowing for a compact structure.

■ The rotation transmission mechanism increases speed by two or more steps, so the speed increase ratio is a dog, which improves the inertia effect of the flywheel.

■ Since the flywheel and rotation transmission mechanism are installed inside the casing, dust does not adhere to the transmission part of the rotation transmission mechanism, and the rotational force is transmitted from the operating shaft side to the flywheel side without any force, which increases the speed of the flywheel. The rotation is gentle,
It has a structure that can withstand years of use.

■ Since the synchronized operating shaft 2 and the flywheel 9 are configured to rotate in the same direction, the rotation of the synchronized operating shaft causes the air inside the casing to be Since the flow follows the rotational direction of the flywheel 9, the air resistance that the flywheel is subjected to is relatively small despite its high speed rotation, and once the speed has been increased, the flywheel continues to absorb its inertial force for a long time. maintain.

■ The rotation transmission mechanism is configured to increase the speed by at least 2 demerits, and not only can the speed increase ratio be set to 1/2, but since each element is small, It is convenient because it can be packed densely in a limited space, which contributes to making it even heavier, and the air flow accompanying the movement of each element is dispersed throughout, reducing the inertial rotation of the flywheel. It has the advantage of not damaging the

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of a display drive device according to the present invention, and FIGS. 2 to 5 are partially cutaway side views of first to fourth embodiments of a tuning operation mechanism applied to the above drive device, respectively. FIG. 6 is a front view of another embodiment of the above drive device. 1.11-14.1'... Tuning operation mechanism, 2°21... Tuning operating shaft, 22... Intermediate shaft, 3,51°52. 7.41.43... Pulley, 4... Thread, 6... Variable capacitor, 8...
... Display pointer, 9 ... Flywheel, 9
a...Friction wheel part, 31.329b. 43a, 43b...pulley part, 10...
Speed increasing mechanism, 101... Planetary gear mechanism, 102.
... Fixed gear mechanism, 103 ... Friction wheel mechanism, 104 ... Pulley mechanism, 11.111-11
3...Casing, 11ta. 15.17, 21.23, 24, 26.28...
・Gear, 13, 32... Arm member, 14, 16,
22゜25.27, 33.35, 42.44...
・Fixed shaft, 23a, 23b, 24a, 24b, 26a,
26b...Gear part, 31.34...Friction wheel, 34a...Friction wheel tube, 31a, 34b.
...Friction wheel ring, 45...V belt.

Claims (1)

[Scope of utility model registration request] In a device that drives a display member together with a tuning mechanism by rotation of a tuning operation shaft, the flywheel rotates in conjunction with the rotation of the tuning operation shaft, and the flywheel rotates by increasing the rotation speed of the tuning operation shaft in at least two stages. A rotation transmission mechanism is provided in the casing for transmitting the inertial rotation of the flywheel to the wheel and to the synchronized operation shaft, and the flywheel is disposed coaxially with the synchronization operation shaft, and the rotation transmission mechanism is arranged coaxially with the synchronization operation shaft. A display drive device in which the mechanism is disposed approximately toward the center from the outer diameter of the flywheel.