JPH018018Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tuning mechanism for a slide selection electronic tuner that includes a variable resistor that allows for easy tuning operation of a television receiver, etc. and relatively clear indication of the channel being selected. .

A push-button electronic tuner with a lamp display using a variable resistor with a multi-row band switch is disclosed in Utility Application No. 152118 (1983) filed by the present applicant.
68307), but the lock type interlocking (channel) push button switch configuration used here is quite complex, and especially when there are many channels to select, the interlocking lock mechanism becomes large and there is a lot of friction.
It was becoming harder to operate and more likely to break down. In addition, this type of interlocking lock push button switch generally lacks flexibility when it comes to changing or improving the number of switch push buttons, the spacing between them, the operating feel of the push buttons, the display, etc., the cost of molds for parts production is high, and assembly is troublesome. Costs were becoming high. As a countermeasure to this problem, an articulated slide type electronic tuner that does not require a push button switch and its interlocking lock mechanism has been developed. Examples of this include the invention of U.S. Patent No. 3,743,976 and U.S. Pat.
There are ideas such as No. 130424. In the invention of the above US patent, channel tuning is possible by adjusting the variable resistor of the preset tuner unit by turning a rotary knob provided on the operating slide shaft. A variable resistor tuning mechanism was provided on one side with respect to the sliding direction of the shaft, and a band switching mechanism was provided on the opposite side, and band switching was performed by rotating a rotating drum for each channel. However, it had the drawbacks of a complicated structure, a fairly large size, high cost, and heavy operating power. Furthermore, although the device disclosed in Utility Model Application Publication No. 130424/1983 has a simple structure, it does not include a band switch, and the slide lever is oriented in the direction of the feed screw of the variable resistor, which limits its use. Because it has a molded frame structure, it may not be strong enough for some applications.
There are also cases where countermeasures such as looseness are required.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the tuning mechanism of the conventional slide selection type electronic tuner, and for this reason, the structure of the present invention is as shown in FIG. A printed circuit board for electronic tuning is constructed by combining a variable resistor block 100 with a multi-row band switch for an electronic tuner as shown in FIG. By sliding the operation shaft 4A of the channel selection slide switch 40, it is possible to easily select a channel in an electronic tuner with preset band switching and tuning voltage adjustment. This improves the channel selection operation of the operating shaft 4A, increases reliability, and provides a good operating feel.

Embodiments of the present invention will be described below with reference to the drawings. The drawings show an embodiment of the present invention, in which A in Fig. 1 is a plan view of the external appearance, B is a front view thereof, C is a side view thereof, and Fig. 1 D is the same as Fig. 1 used in the present invention. Figure E is a rear view of the variable resistor block with multi-row band switch for electronic tuner shown in FIG. 2A is a partially enlarged sectional view taken along line aa' in FIG. 1A, FIG. 2B is an enlarged sectional view taken along line bb' in FIG. 4.A is an enlarged plan view of the slide spring, B is a front view of the same, FIG. 5A is a plan view of the sliding body, B is a front view of the same, C is a sectional view taken along line c-c' in the front view, and FIG. 7A is a plan view of the case, B is a front view, C is a side view, FIG. 8 is a plan view and front view of the sliding plate, FIG. 9 A is a plan view of the lower sliding body, B
10A is a front view of the shorting piece, B is a plan view of the same, FIG. 11A is a plan view of the lower case, and FIG. 11B is a front view of the same.

In FIGS. 1 to 3, reference numeral 1 denotes a rectangular copper foil insulating board for printed circuits, and a printed circuit is provided on the back side. A multi-row variable resistor block 100 with a band switch shown in Utility Application No. 55-60483 and 55-101959 by the present applicant is fixed to the upper part of the front side of the board, and the variable resistor terminals, switch terminals, etc. are connected to the back side. It is soldered to the printed circuit in a known manner. Further, an adjustable slide switch 40 for channel selection is mounted below the front side of the board 1 in parallel with the variable resistor block 100. The slide switch 4
The operation shaft 4A of No. 0 protrudes in a direction perpendicular to the substrate surface, and a channel can be arbitrarily selected by sliding the operation shaft 4A. The board 1 also serves as a switch board for the adjustable slide switch 40.

The variable resistor block 100 with a band switch has a rectangular shape, and has a molded box-shaped case 10.
As shown in Figure 1, the front side of the case 4 is provided with a plurality of adjustment knobs 112 for each variable resistor corresponding to the number of channels, and the adjustment position of each variable resistor is perpendicular to the long side direction of the case. 104 surface long hole 47
This is indicated by the resistor slider indicator protrusion 71. The band changeover switch is operated by moving the band switch sliding body knob protrusion 51 through the case rectangular hole 45 of the case 104 that is perpendicular to the long side direction (LVHF, HVHF, UHF for television receivers).
etc.) can be adjusted as desired. Also, the above case 104
As shown in FIG. 1D, a plurality of band switch terminals 32T are provided on the upper side and a plurality of variable resistor output terminals 111T are provided on the lower side corresponding to each channel on the back side of the .
A resistor common circuit terminal 22T and band switch external power supply terminals 33T, 34T, and 35T are provided on the left side surface, respectively.

FIG. 3 shows a printed circuit pattern on the back side of the board 1, and a connection pattern 1E including terminal holes corresponding to the band switch terminals 32T of the band switch equipped multi-row variable resistor block 100 (8 channels in this embodiment). ' ₁ to _1E'8 are provided in parallel on the upper part and connected to each of the above terminals by soldering or the like using a known technique. A long hole 1A that engages with an operating shaft 4A of a sliding body 4, which will be described later, is provided in the lower part of the substrate 1, and band switch fixed electrode portions 1E ₁ to 1E ₈ corresponding to the band switch terminals 32T are provided along the long hole. provided, the band switch terminal 32T, connection pattern 1
It is connected to E′ ₁ to 1E′ ₈ by printed wiring. Similarly, variable resistor block 10 with band switch
Connection patterns 1B' ₁ to 1B' ₈ including terminal holes corresponding to variable resistor output terminals 111T of 0 are provided in parallel in the center and connected to each other by soldering or the like. Further, a variable resistor fixed electrode portion 1 corresponding to the variable resistor output terminal 111T is provided at the bottom of the substrate 1 along the long hole 1A.
B ₁ to 1B ₈ are provided, and the variable resistor output terminal 11
It is connected to the 1T connection patterns 1B' ₁ to 1B' ₈ by printed wiring.

Here, along the elongated hole 1A of the substrate 1, the band switch fixed electrodes 1E ₁ to 1E ₈ and the corresponding band switch common electrode 1E ₀ and the variable resistor fixed electrodes 1B ₁ to 1B ₈ and the corresponding variable resistors are arranged. The sliding contact portion 11, which will be described later, includes the common electrode _1B0 .
The short-circuiting movable contact piece 11 that slides into bridge contact at B is operated via the operating shaft 4A. Cutout portions 1EB are provided in the band switch common electrode portion 1E ₀ corresponding to the switch electrode portions 1E ₁ to _{1E 8} to prevent mutual interference between the variable resistor electrode circuit and the band switch circuit. Positioning protrusions 12T 1 to 12 of the lower case 12, which will be described later, are located around the elongated hole 1A at the bottom of the substrate ₁ .
Engagement holes or notches 1T ₁ to 1T ₆ that engage with T ₆ and engagement notches 1S 1 and 1S ₂ that engage with positioning projections _{8S 1} and 8S ₂ of the case 8 are provided.

As shown in FIGS. 2 and 5, a box-shaped sliding body 4 made of an insulating mold has an operating shaft portion 4A made of a metal plate etc. protruding from its upper part, and an elastic metal plate is formed on the top surface of the sliding body 4. A slide spring 3 as shown in FIG. 4, which is made of an elastic metal plate having a square hole 3A that engages with the operating shaft 4A, is caulked and fixed to the engagement protrusions 4B on the upper surface of the slider 4. Sliding body 4
A round hole 4D for the articulation mechanism is provided on one side, and a square through hole is provided in the center of the sliding body 4 through which a shield plate 9 for preventing foreign matter from entering, which will be described later, is inserted in the sliding direction. 4E is provided. A lower shaft portion 4A' that engages with the elongated hole 1A of the insulating substrate 1 is provided on the lower surface of the slider 4, and the lower shaft portion 4A' is fixedly engaged with a square through hole 10C of the lower slider 10 and its engaging portion 10F, which will be described later. The snap shaft portion 4F is made to protrude, and the locking portion 4 is attached to the tip of the snap shaft portion 4F.
G is provided.

The lower sliding body 10 as shown in FIG. 9 made of an insulating mold has fixing protrusions 10A, 10 on its upper surface.
A 10th plate consisting of a pair of mutually independent elastic metal plates
A shorting piece 11 as shown in the figure is fixed through its mounting hole 11A, and the sliding contact portion 11B at the free end of each shorting piece 11 is connected to the variable resistor electrode portion 1B ₀ on the back surface of the substrate 1,
1B ₁ to 1B ₈ , and band switch electrode part 1E ₀ ,
Sliding contact with 1E ₁ to 1E ₈ .

Reference numeral 5 denotes a sliding body as shown in FIG. 6 which is made of an insulating plate with excellent sliding properties, and is connected to the operating shaft 4A of the sliding body 4 from above from above the slide spring 3 through its central square hole 5A. Engage and insert.

A box-shaped case 8 as shown in FIG. 7, which is made of a metal plate fixed to the upper surface of the substrate 1, has a long hole 8A on the upper surface from which the operating shaft portion 4A of the sliding body 4 protrudes, and the inner surface of the case 8 is slidably fitted to the side surface of the sliding body 4. The inner surface of the box-shaped case 8 is provided with a plurality of engagement joint recesses 8D that engage with the coil spring 6 and steel balls 7 inserted into the round hole 4D on the side surface of the sliding body 4.
Further, in both end walls of the case 8 in the sliding direction, there are engaging holes 8B and 8B' (not shown) for fixing the shield plate 9 as shown in FIG. ), and insert and secure both ends 9B and 9B' of the same plate. The case 8 protrudes downward from the lower portions of both end walls in the sliding direction and engages the engagement notch 1 of the board 1.
Positioning protrusions 8S ₁ and 8S ₂ that engage with S ₁ and 1S ₂ are provided, and 1 that is in close contact with the upper surface of the board 1 at the lower end of the case 8 is provided.
Cutouts 8T ₁ to 8T ₆ for fixing are provided at the side end portions of the pair of flange portions 8E.

A dish-shaped lower case 12 as shown in FIG. 11, which is made of a metal plate that engages with the case 8, is fixed to the lower surface of the substrate 1, and covers the lower sliding body 10, has an upper surface of both ends of the substrate 1 in the sliding direction. Closely adhere to the bottom surface and extend further to 1
A pair of sliding type channel selection block mounting portions 12E and mounting holes 12F are provided. Positioning protrusions 12T ₁ to 12T ₆ are provided upward on both sides of the lower case 12, and engagement holes 1T ₁ to 1T ₆ of the substrate 1 and cutouts 8T 1 to 8T of the pair of flange portions 8E of the case 8 _are provided. ₆ through positioning engagement, and the claw portion 12B at the tip thereof is bent and fixed to each other.

The assembly of this invention begins with the variable resistor block 100.
Insert the terminal parts 32T, 111T, etc. on the back side of the board 1 from the front side into the engagement holes of the connection patterns 1E' ₁ to 1E' ₈ and 1B' ₁ to 1B' ₈ including the respective terminal holes to be engaged,
Secure the solder connections in the usual way. Next, sliding body 4
A coil spring 6 and a steel ball 7 are inserted into the side round hole 4D, and a sliding plate is placed on the operating shaft 4A of the sliding body 4 on top of the slide spring 3 fixed to the upper part of the sliding body 4 as described above. 5 are inserted through the central square holes 5A.

Next, a shield plate 9 is attached to the through hole 4E of the sliding body 4.
After inserting the operating shaft 4A of the sliding body 4 into the elongated hole 8A of the case 8, both ends 9B and 9B' of the flexible plate 9 are fixed to the engagement holes 8B and 8B' of the case 8. . Next, the sliding body 4 inserted into this case 8
The snap shaft portion 4F on the lower surface is slidably inserted into the long groove 1A of the board 1, and the lower sliding body 10, which has a pair of shorting pieces 11 fixed from the bottom to the top of the board 1, is inserted into the long groove 1A of the board 1 at its penetration angle. Insert it through the hole 10C and secure it with a snap. Next, the dish-shaped lower case 12 that covers the lower sliding body 10 from below is connected to the upper positioning protrusions 12T ₁ to 12T ₆ of the case 8 through the engagement holes or notches 1T ₁ to 1T ₆ of the substrate 1. The insertion position is determined through the fixing notches 8T ₁ to 8T ₆ of the pair of flange portions 8E, and each claw portion 12B at the tip thereof is bent to fix each other.

Note that the structure of the channel selection slide switch 40 can be easily changed. That is, for example, by changing the pitch of the plurality of articulation recesses 8D on the inner surface of the case 8 and changing the pitch of the electrode pattern of the printed circuit of the board 1 accordingly, the pitch of the channel selection slide switch 40 and the number of channels can be easily changed. can do.

As described above in detail, according to the electronic tuner tuning component including the variable resistor according to the present invention, the structure of the tuning slide switch 40 is mounted on the predetermined surface of the printed circuit insulating board 1 using the sliding body 4. A case 8 having a slidably built-in case 8 is attached, and an operating shaft 4A protruding from the upper surface of the sliding body 4 is attached, and a lower shaft portion 4A' protruding from the lower surface of the sliding body 4 is attached to the upper surface of the sliding body 4. The lower sliding body 10 is attached to the lower shaft portion 4A' by inserting it into the elongated hole 1A provided in the insulating board 1 for printed circuits so as to protrude to the back side, and the above-mentioned insulating material for printed circuits is attached to the upper surface of the lower sliding body 10. Since the structure is such that the shorting movable contact piece 11 that slides on the back side of the printed circuit board 1 is attached, the short-circuiting movable contact piece 11 that slides on the back side of the printed circuit board 1 is attached, so that the short circuit movable contact piece 11 that is formed on the back side of the printed circuit insulating board 1 by the sliding body 4 provided on the top surface of the printed circuit insulating board 1 The structure of the slide switch having the function of switching patterns is simplified.

Further, a variable resistor block 100 with a multi-row band switch is attached to a predetermined position on the surface of the printed circuit insulating board 1, and a slide switch 4 for channel selection is mounted on the same printed circuit insulating board 1.
0, the overall structure is simple and assembly is easy. A plurality of variable resistor blocks 100 with multi-row band switches may be provided on the printed circuit insulating substrate 1.

Further, the case 104 of the variable resistor block 100 with a multi-row band switch is constructed in a rectangular shape, and the case 104 is arranged adjacent to the long side of the variable resistor block 100 with a multi-row band switch and parallel to the long side. If the channel selection slide switch 40 is arranged so that the sliding body 4 slides, its thickness and area can be reduced, and the device can be made smaller.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which A in Fig. 1 is a plan view of the external appearance, B is a front view thereof, C is a side view thereof, and Fig. 1 D is the same as Fig. 1 used in the present invention. Figure E is a rear view of the variable resistor block with multi-row band switch for electronic tuner shown in FIG. FIG. 2A is a partially enlarged sectional view taken along line aa' in FIG. 1A, and FIG.
Fig. 3 is a back view of the board, Fig. 4 A is an enlarged plan view of the slide spring, B is a front view of the same, Fig. 5 A is a plan view of the sliding body, B is a front view, and C is a c in the front view.
-c' sectional view, Figure 6 is a plan view and front view of the sliding plate, Figure 7 A is a plan view of the case, B is a front view of the same,
C is the same side view, FIG. 8 is a plan view and front view of the shield plate, FIG. 9 A is a plan view of the lower sliding body, B is the same front view, C is the same side view, and FIG. 10 A is the same side view. FIG. 11A is a front view of the shorting piece, B is a plan view thereof, FIG. 11A is a plan view of the lower case, and FIG. 11B is a front view thereof. 1: Insulating board for printed circuit, 1A: Long hole, 1
B ₁ to 1B ₈ : Variable resistor fixed electrode part, 1B ₀ : Variable resistor common electrode part, 1E ₁ to 1E ₈ : Band switch fixed electrode part, 1E ₀ : Band switch common electrode part, 1B' ₁ to 1B' ₈ : Connection pattern, 1E' ₁ ~ 1
E′ ₈ : Connection pattern, 1EB: Notch, 1T ₁ , 1
T ₃ , 1T ₅ : Engagement notch, 1T ₂ , 1T ₄ , 1T ₆ : Engagement hole, 1S ₁ , 1S ₂ : Engagement notch, 3: Slide spring, 3A: Square hole, 4: Sliding body, 4A : Operation axis,
4A': Lower shaft part, 4E: Penetrating square hole part, 4F: Snap shaft part, 4G: Locking part, 5: Sliding plate, 5A:
Square hole, 6: Coil spring, 7: Steel ball, 8: Case, 8B: Engagement hole, 8A: Long hole, 8D: Engagement articulation recess, 8E: Flange, 8S ₁ , 8S ₂ : Positioning protrusion , 8T ₁ to 8T ₆ : Notch part, 9 : Shiyahei plate,
10: Lower sliding body, 10A, 10B: Fixed protrusion,
10C: Penetrating square hole, 11: Shorting piece, 11B: Sliding contact part, 12: Lower case, 12B: Claw part, 12
E: Mounting part, 12F: Mounting hole, 12T ₁ ~ 12
T ₆ : Positioning protrusion, 32T: Band switch terminal, 22T: Resistor common circuit terminal, 23T: Resistor terminal, 33T, 34T, 35T: Band switch external power terminal, 40: Adjustable slide switch for tuning, 47 : Long hole, 51: Band switch sliding body knob protrusion, 71: Indicator protrusion, 10
0: Multi-row variable resistor block with band switch, 104: Case, 111T: Variable resistor output terminal, 112: Adjustment knob.

Claims (1)

[Claims for Utility Model Registration] (1) A multi-row structure in which a plurality of variable resistors with band switches are built in parallel in a case, and the terminals of the variable resistors and the terminals of the band switch protrude from the back side of the case. A variable resistor block 100 with a shaped band switch is attached to a predetermined position on the surface of the insulating substrate 1, and the terminals of the variable resistor and the terminal of the band switch are connected to respective electrode patterns formed on the back surface of the insulating substrate 1. At the same time, a slide switch 40 for channel selection is attached to the surface of the insulating substrate 1 other than the portion where the variable resistor block 100 with multi-row band switch is attached, and the slide switch 40 has a sliding body slidably attached to the case. An operating shaft is housed in the case and protrudes from the top surface of the sliding body, and a lower shaft part that projects from the bottom surface of the sliding body is inserted into an elongated hole provided in the insulating substrate 1. A lower sliding body is attached to the lower shaft portion, and the insulating substrate 1 is attached to the upper surface of the lower sliding body.
A variable resistor electrode is attached to the insulating substrate 1 so that the shorting movable contact piece slides into contact with the back surface of the insulating substrate 1, and the shorting movable contact piece slides on the back surface of the insulating substrate 1. A band switch electrode is formed, and the variable resistor electrode and the band switch electrode are connected to an electrode pattern connected to a terminal of the variable resistor and an electrode pattern connected to a terminal of the band switch, respectively. Tuning parts for electronic tuners, including variable resistors. (2) The case of the variable resistor block with multi-row band switch is configured in a rectangular shape, and
Utility model registration claim No. 1, characterized in that a slide switch is arranged adjacent to a long side of the variable resistor block with a multi-row band switch so that the sliding body slides parallel to the long side. Tuning parts for electronic tuners that include the variable resistor described in (1).