JPH02179114A - Dial driver - Google Patents

Abstract

PURPOSE:To allow the device to cope with tuner blocks different in kind by providing two different rack guides to one chassis. CONSTITUTION:A chassis 11 provided with a pointer guide 14 is provided with a rack guide 15 guiding the running of a 1st pointer rack 12 driven by a knob 13 provided with a small diameter gear 18 and a rack guide 16 arranged to the same position as the knob 13 provided with the small size gear 18 and driven by a knob 13 having a large diameter gear. That is, two kinds of rack guides 15, 16 are provided to one chassis 11 by matching the mount position of the knob 13 provided with the small diameter gear 18 and the large diameter gear. Thus, one kind of dial chassis is enough for different tuner blocks in such a way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dial driving device used in a radio receiver and which can be shared by different tuner blocks.

2. Description of the Related Art In recent years, dial drive devices have been simplified, parts have been shared, and the devices have been streamlined.

An example of a conventional dial driving device will be described below with reference to the drawings.

8 and 9 show a conventional dial driving device. 8th
In the figures and FIG. 9, 81 is a synthetic resin chassis, 82 is a pointer rack, 83 is a rotary knob, 84 is a pointer guide formed on the needle 81, 86 is a rack guide formed on the chassis 81, and 86 is the above-mentioned Rotary knob 8
A small diameter gear 87 is formed integrally with the pointer rack 8.
This is a pointer integrally formed at the tip of 2. Here, the rotary knob 83 is rotatably supported by having its rotary shaft 83A inserted into a bearing hole 88 provided in the rack 81, and is connected to the rack guide 85 by a small diameter gear 86 at the tip of the rotary shaft 83A. A pointer rack 82 that is slidably supported is engaged with the pointer rack 82, and a pointer 87 at the tip of the pointer rack 82 is configured to run horizontally on the pointer guide 84. The dial block assembled as described above is housed in a cabinet 89 as shown in FIG. . The idler gear 91 is attached to a rotating shaft of a variable capacitor 93 attached to a printed circuit board 92 with a screw 9.
It is fixed at 4.

In addition, in FIG. 9, 96 is a ferrite antenna.

10 and 11 show a conventional dial drive device. 10 and 11, 101 is a synthetic resin chassis, 102 is a pointer rack, 103 is a rotary knob, 104 is a pointer guide formed on the chassis 101, 105 is a rack guide formed on the chassis 101, 106 107 is a pointer, which is connected to the pointer rack 102 via a connecting rod 10B. Here, the rotary knob 1o3 has its rotary shaft 103A inserted into a bearing hole 109 provided in the chassis 101 and is rotatably supported, and is slidably supported on the large diameter gear 106 by the rack guide 106. A supported pointer rack 102 is engaged with the pointer rack 102, and the pointer 107 is configured to move laterally on the pointer guide 104 following the movement of the pointer rack 102. The dial block configured as described above is housed in a cabinet 110 as shown in FIG.
It is fixed to a variable capacitor 112 provided above with screws 113. In addition, 114 in FIG. 11 is a ferrite antenna.

In the dial drive device configured as described above, when the rotary knob 83 or 103 is rotated in a certain direction, the variable capacitor 93 is connected directly to the knob or via the idler gear 91.
Or 112 can be rotated to select any receiving frequency.

At the same time, the pointer rack 8 is engaged with the small diameter gear 8e or large diameter gear 1o6 provided on the rotary knob 83 or 103.
2 or 102 moves along the rack guide 86 or 106 in the same direction as the rotation direction of the knob, and the pointer 87 or 107 provided at the tip of the pointer rack moves along the pointer guide 84 or 104.

If the rotary knob 83 or 103 is rotated in the opposite direction, the pointer 87 or 107 will move in the opposite direction.

Problems to be Solved by the Invention Problems to be Solved by the Invention However, in the conventional configuration as described above, dial blocks with different shapes of chassis are required to correspond to the two types of tuner blocks. This has disadvantages in that the number of types increases, management losses occur, and two types of molds are required, which is disadvantageous in terms of cost.

In view of the above-mentioned problems, the present invention provides a dial drive device that can configure two types of dial blocks using one chassis, can be shared to correspond to two types of tuner blocks, and can reduce the number of parts. It is.

Means for Solving the Problems In order to solve the above problems, the dial drive device of the present invention has the following features:
A chassis having one pointer guide section is provided with a first rack guide section that guides the travel of a first pointer rack driven by a knob provided with a small diameter gear and arranged at the same position as the knob provided with the small diameter gear. and a second rack guide portion for guiding the movement of a second pointer rack driven by a knob having a large diameter gear.

Effects According to the present invention, two types of rack guides can be provided on one chassis by aligning the mounting positions of the knobs with the small diameter gear and the large diameter gear with the above-described configuration.
One type of dial chassis can be used for different tuner blocks.

At this time, the knob provided with the large-diameter gear can also be set so that it can be directly inserted and attached to the shaft of the variable capacitor.

Embodiments Hereinafter, dial drive devices according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a dial drive device in one embodiment of the present invention, and shows a dial block composed of a small-diameter geared knob. In FIG. 1, 11 is a chassis, 12 is a pointer rack, 13 is a knob provided with a small diameter gear 18, 14 is a pointer guide provided on the chassis 11, 16 is a first rack guide, and 16 is provided with a large diameter gear. The second rank guide 17 in the case of a knob is a pointer 18 provided at the tip of the pointer rank is a small diameter gear. Figure 2 shows the dial block attached to the tuner block. To explain the operation of the wood combination example, when the knob 13 is rotated in the direction of the arrow, the small diameter gear 18 is rotated in the same direction. The pointer rack 12 engaged with the small diameter gear 18 moves along the first rack guide 16 in the rotational direction, and the pointer rack 12
A pointer 17 provided at the end of the pointer also moves simultaneously along the pointer guide 14 to indicate the position. At this time, when the knob 13 is rotated in FIG. 2, the variable capacitor 93 is also rotated in the same direction as the arrow through the intermediate gear 91, and an arbitrary reception frequency can be selected. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, showing a state in which the small-diameter gear and the pointer rack are engaged.

FIG. 4 shows a dial drive device according to an embodiment of the present invention, and shows a dial block composed of a large-diameter geared knob. In FIG. 4, 19 is a knob provided with a large-diameter gear 20, 20 is a large-diameter gear, and 21 is a large-diameter gear, which is a driven pointer rack. FIG. 6 shows the dial block attached to the tuner block. To explain the difference between the operation of the wood combination example and the first combination example, when the knob 19 is rotated in the direction of the arrow, the large diameter gear 2
0 also rotates in the same direction, and the pointer rack 21 engaged therewith moves along the second rack guide 16. Therefore, the pointer 17 also moves in the same direction at the same time.

FIG. 6 is a view taken along the line B--B in FIG. 4, and FIG. 7 is a diagram showing a state in which a knob provided with a large-diameter gear and a pointer rack are engaged with each other.

As described above, according to this embodiment, there is a first rack guide that guides the movement of the first pointer rank driven by a knob provided with a small diameter gear, and a large rack guide located at the same position as the knob provided with a small diameter gear. By providing a second rack guide section that guides the movement of the second pointer rack driven by a knob provided with a diameter gear, two different drive systems are formed in one chassis, and different tuner blocks are provided. It can be compatible with any model.

Effects of the Invention As described above, the present invention can realize a dial block with two different drive systems by providing two different rack guides in one chassis, and is suitable for different models of tuner blocks. A drive system using a knob provided with a small diameter gear or a drive system using a knob provided with a large diameter gear can be selected and adopted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a dial block of a dial drive device according to an embodiment of the present invention, FIG. 2 is a sectional view showing the dial block of FIG. 1 attached to a tuner block, and FIG. Figure A-Alfr side view, Figure 4 is a perspective view showing a dial block of a dial drive device in one embodiment of the present invention, and Figure 6 is a sectional view showing a state in which the dial block of Figure 4 is attached to a tuner block. , 6th
The drawings are a sectional view taken along the line B-B in FIG. 4, FIG. 7 is a rear view of the knob shown in FIG. 6, FIGS. 8 and 9 are a perspective view and a sectional view of a conventional dial drive device, and FIG. 1O. FIG. 11 is a perspective view and a sectional view showing the same conventional dial driving device. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] One pointer guide section corresponding to the dial scale section, the first rack guide section that guides the travel of the first pointer rack driven by the knob provided with a small diameter gear, and the same as the knob provided with a small diameter gear. A dial drive device comprising a second rack guide section that guides the movement of a second pointer rack driven by a knob provided with a large diameter gear located at a certain location.