KR800001582Y1 - Lever for memory fine tuning arrengements for turret type television tuner - Google Patents

Abstract

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Description

Untuning apparatus for tuners

1 is a partial side view of a television tuner with a rotary preset untuning device having a rocking member according to the present invention;

2 is a cross-sectional view taken along line 2-2 of FIG.

3 is a cross-sectional view taken along line 3-3 of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

5 is a cross-sectional view taken along line 5-5 of FIG.

6 is a rear view of the rocking member according to the present invention.

7 is a left side view of FIG.

8 is an exploded perspective view of an important part of FIG.

9 is an exploded perspective view of an important part of the push preset non-tuning device.

The present invention relates to an improved configuration of a pivoting rocking member for use in a preset untuning device of a turret television tuner and a structure in which the rocking member is hinged to the chassis base surface. The present invention relates to a tuner untuning device capable of reducing manufacturing costs and improving the efficiency of assembly work.

VHF television tuners for converting television channels using mechanical instruments are mainly classified into rotorless tuners and turret tuners, and turret tuners are widely used.

Since the turret tuner currently used has a channel selection shaft, an impedance device that is adjustable in the local oscillation circuit is used to obtain accurate tuning as an operation circuit that is selectively connected at each channel position.

This impedance device is controlled by a non-coaxial shaft mounted coaxially with the channel selection shaft, and is usually manipulated by the viewer to adjust the tuning impedance with respect to the predetermined position of the selection shaft.

Therefore, a variety of memory unsynchronization apparatuses, that is, unsynchronization preset apparatuses, which maintain the synchronization of each channel have been proposed so that the viewer does not need to adjust the unsynchronization every time the channel is changed once the viewer has adjusted.

One of these types is of the push-preset method in which the user presses the handle of the micro-coaxial and rotates the knob in such a state to adjust the micro-elements in the tuner. It is a rotary preset method that controls the micro-element by interlocking a micro-tuning mechanism just by rotating.

These untuned devices are particularly suitable for turret tuners, in which each tuner coil assembly or coil unit is provided for each channel.

The tuning coil unit is releasably mounted in a rotatable turret structure, and the tuning unit has a tuning coil for the oscillator and its inductance is extended to the hole at one end of the tuning coil unit adjacent to the tuning coil for the oscillator. The adjustment member, for example, a screw or the like, is advanced to adjust.

Since the tuner is a mass-produced tuner, the preset mechanism of the untuned device is preferably made of low number of parts, easy assembly, and low cost.

In addition, since the micro coaxial is axially isolated from the coarse screw shaft of each tuning coil assembly, a clutch mechanism for relaying the rotational movement of the micro coaxial shaft is required.

This clutch mechanism is required to automatically disengage the unscrewed screws when the viewer opens the uncoordinated shaft and converts the turret body to another channel position.

In such a conventional non-tuning device, a stud mounted on the chassis base front plate is used for the structure of mounting the pivotally swinging member on the chassis base face plate, and the pivot part of the swing member is fitted to the hinge. The bias spring was installed between the front plate and the rotating plate. For this reason, it is necessary to install the studs at right angles to the front plate, and the accuracy of the shaft supporting the rocking member is required, and since it is manufactured as zinc die-cast, relatively expensive materials and processing have been required.

It is therefore an object of the present invention to improve this in view of the drawbacks of the conventional structure described above, and to provide a non-tuning device having a new and improved pivotal swing member.

Another object of the present invention is to propose an improved pivot structure of a rocking plate for a chassis base face plate, and to provide a non-tuning device as a base that can be easily and accurately assembled by simplifying the number of parts.

Another object of the present invention is to provide an improved rocking plate that is attached to the chassis front plate at a right angle.

Another object of the present invention is to fabricate the rocking member integrally with a synthetic resin material to produce an untuned mechanism at a light weight and low cost, and to provide it as a rotary preset or push preset type untuned device.

According to the present invention, the shaft pivoting member of the non-tuning device is mounted on the chassis base front plate.

The swinging member is provided with a spring shaft for biasing the swinging plate in the uncoordinated shaft direction in a usual manner, and a support shaft for installing a pivot for integrally formed with the swinging plate and an uncoordinated transmission gear.

The pivot plate has a head, neck, and fuselage formed at its front end, and a cutout of a large diameter opening and a small opening is formed in the chassis base face plate. The head portion and the neck portion are first inserted into the large-diameter opening of the chassis bearing front plate, and then the neck portion is fitted to the small-diameter opening through the notch communicating with the small-diameter opening.

Therefore, since the structure is simplified, it is easy to assemble, thereby providing a non-tuning device of a turret type tuner suitable for mass production.

Such pivot structure can be applied regardless of the untuned method of the untuned device, i.e., push preset or rotary preset, and thus can be mass-produced as a common part.

Further, the swinging member has an advantage of being freely added in accordance with the change of the forming jig of the protrusion or the protrusion as the clutch plate locking means, and the protrusion which protrudes in order to maintain the position parallel to the frame as the reinforcing means.

In summary, as a preset untuning device of a turret type television tuner equipped with a pivoting swing member mounted on the chassis base and always biased in the non-tuning shaft direction, the pivot of the swing member described above is fixed to the fuselage part, the head part, and the amount thereof. It consists of a neck portion connecting the parts, and this shaft is inserted into the large diameter opening part of the head and neck portion of the shaft, and then slides the neck part to the small diameter opening part, which is connected to the large boundary part and the small boundary part formed in the chassis base. Move and hinge. In addition, in order to prevent an inclination of the axis perpendicular to the chassis base as a bias tension applied to the swinging member, a protrusion extending in the biasing direction is provided in the swinging member, and the front end thereof is brought into contact with the chassis base surface. Maintain parallel installation of the chassis base surface.

In detail, a clutch mechanism including a coaxial first drive gear, a second drive gear supported by a rocking member, and a clutch coupling means provided on one of these gears. By adjusting the screw of the crude member. When the uncoordinated shaft is released, the swinging member is returned to its initial position (first position) by the spring means to isolate the untuned device from the screw of the uncoordinated member. It resists and moves to another position (second position) to engage the fine tuning device and the fine screw.

Here, the pivot member is pivotally pivoted from the support shaft for supporting the second drive gear and the pivot pivot is made of a synthetic resin, for example, a fire-resistant nylon material, and is integrally manufactured together with the pivot member. According to the joint operation with the joint, pivoting of the rocking member is pivotally supported on the chassis base face plate with extremely simple and accurate accuracy.

Other objects and advantages of the present invention will become apparent from the following description of the drawings.

The rocking member according to the present invention is used for a turret type VHF tuner 11 having a rotary preset microtuning as shown in FIG.

The tuner 11 is constituted by a turret body 12, a chassis base 13, an untuned device 16, and a chassis cover (not shown).

The chassis base 13 includes a front plate 14, a top plate 15, and a back plate (not shown in the drawing), and bends and reinforces along side lateral extension portions of the top plate 15 to form a substantially U-shaped case. Make up a sieve.

The chassis base 13 of this case structure accommodates a fixed contact body 17 having a plurality of contacts fixed to an insulator and a channel selection rotary shaft turret body 12.

The seal cover is mounted to the chassis base 13 to seal the entire assembly. In order to select a television channel of the VHF band, a tuning coil assembly for each channel, that is, a tuning coil unit 18 is detachably mounted to the turret body 12. In addition to the tuning coil 19 of the local oscillation stage, the tuning coil (not shown) of the RF stage or the mixer stage is wound on the insulating rod of each tuning coil unit 18.

When the turret body 12 is rotated to the desired channel selection position by the channel selection shaft 20, the coil on the specific tuning coil unit 18 is selected to contact the contact group of the fixed contact body 17.

The channel selection shaft 20 extends long by inserting the front and rear plates of the chassis base 13, and is provided with a clutch mechanism behind the rear plate, an untuned mechanism in front of the front plate, and a turret body between the two side plates as shaft support. do.

The bearing structure on the chassis base face plate 14 side is constituted as the positioning washer 21 behind the front plate 14 and the bearing plate 22 in front of the bearing plate 22, and the bearing plate 22 is a pair of bearing plates. The protrusion 23 is fitted to the front plate 14 to be supported.

The bearing plate 22 supports the selection shaft 20 by the action of a spring 26 fitted into the flange portion 25 of the cut washer 24.

The other end of the spring 26 is used to apply an elastic pressure to the clutch mechanism provided behind the chassis base 13.

On the other hand, the rear bearing portion of the selection shaft 20 is a cutout formed on the rear plate (not shown) of the chassis base to form the bearing under the elastic pressure of the clutch mechanism. Each of the tuning coil units 18 of the turret body 12 is configured to vary the inductance of the oscillation single tuning coil 19 by varying the memory, and usually by adjusting the uncoated element screw 27 of the untuned member. To get inductance. That is, the uncoated screw 27 extends so as to reach one point within the coarse coil 19 for local oscillation at the end face of the insulated rod of the coaxial coil unit 18, and adjusts the coarse screw 27 back and forth.

A pinion gear 28 is formed at the tip of the micro screw 27 for fine adjustment by the retreat of the micro screw 27, and the micro screw is transmitted via the drive transmission mechanism of the micro tuning device 16. FIG.

In addition, the stop piece 31 made of synthetic resin is attached to the notch portion of the slide hole 29 formed in the front plate 14 in order to regulate the fine screw 27 in the untuned adjustment range. When the hook 32 of the 31 is fitted into the hole 30 of the front plate 14 to be fixed, the micro screw 27 is restricted from moving forward.

That is, grooves are formed at both edges of the stationary piece 31, and the grooves are fitted into the notches of the slide hole 29 through which the pinion teeth of the second drive gear body described later are inserted.

In order to maintain the stationary piece 31 in a fixed position, a hook 32 is provided at the end of the arm of the stationary piece, which hook 32 snaps into the hole 30 of the front plate 14. Lose.

The curved surface extending inwardly from the stationary piece 31 serves as a stopper portion opposed to the front end of the above-mentioned screw thread 27.

Therefore, when the uncoated screw 27 comes to the outermost position and comes into contact with the curved surface of the stop piece 31, even if the uncoated screw 27 is rotated again, it is resisted to the elasticity of the elastic metal ball which maintains this state, thereby turning over the thread. .

In addition to the regulation of the adjustment range, the stop piece 31 is provided with a bottom edge 33 and a protrusion 34, and the movement restraining means to the outside and the stopping means in the inner direction with respect to the second drive gear. It has the same effect.

In particular, the inner curved portion of the stop member 31 also acts as a cam surface for smoothly inserting unnecessary projections of the pinion tooth 28 of the unscrewed screw 27 when the turret body 12 is rotated to switch channels.

The action on the rear of the uncoated screw 27 is controlled by the pinion tooth 28 abutting the insulator end face of the tuning coil unit 18.

Therefore, when engaging with the non-tuning device 16, it is possible to adjust the fine thread 27 within the range of the above-described two regulated position, and the untuned position of the once adjusted micro screw 27 is predetermined until the next readjustment. Will maintain the position of.

For example, since the micro screw 27 is held as a mooring by the elastic metal sphere, the turret body 12 is rotated in accordance with the change of the channel so that the adjustment position of the micro screw 27 can be moved along the predetermined passage. It is kept and remembers unsynchronization.

In order to individually adjust the fine thread 27, the micro-tuning device 16 made of the pivotal swing member and the power transmission gear system according to the present invention is installed. As shown in FIG. 1, the untuning device 16 has a coaxial untuning shaft 35 that arbitrarily rotates on the channel selection shaft 20. As shown in FIG.

The fine tuning shaft 35 has its tip maintained at a predetermined position on the selection shaft 20 by the key 36, and the lower portion 41 of the first drive gear 40 is fixed to the rear stage shaft. In the case of the rotary preset type, the first drive gear 40 has a flange 42 extending in the radial direction as shown in FIGS. 3 and 8, and has approximately the same pair of flat teeth. 43 and 44 are provided on both sides of the flange 42, which are integrally formed with the untuned side 35 as synthetic resin.

The flange 42 extends outward from the front end of the teeth of the teeth 43 and 44, and the teeth of the teeth are provided to cross each other in a preset phase relationship.

The first drive gear 40 made of synthetic resin material is similarly engaged with a pair of flat gears 47 and 48 formed on the lower portion 46 of the second drive gear body 45 made of synthetic resin. This second drive gear 45 is hinged to rotate on the shaft on which the pivoting swing member 50, which will be described later, is supported.

The flat teeth 47 and 48 of approximately the same shape extending outward from the lower portion 46 of the second drive gear 45 are separated from each other by forming grooves of a suitable width between the pair of teeth. The teeth are intersected with each other in the same phase relationship with the flat teeth 43 and 44 of the first drive gear 40.

And the flange 42 is located in the groove, the coupling between the first and second drive gear 40 and 45 is made.

A pinion gear 49 is installed at the other end of the lower portion 46 of the second drive gear 45. The pinion gear 49 is coupled to the pinion gear 28 of the unscrewed screw 27. Viii)

Here, since the first and second drive gears 40 and 45 are each formed of a suitable plastic material, they are manufactured at low cost.

Retraction of the pinion gear 28 of the unscrewed screw 27 and the pinion 49 of the second drive gear 45, i.e., the disengagement at the time of driving connection or channel change of the uncoated screw, is performed on the front surface of the chassis base 13. It is performed by the pivot motion by the swinging member 50 pivoted to the board 14 and axially rotating.

The configuration of the pivotal swinging member 50 is an important feature of the present invention, and can be shared as the swinging member of the push-preset type non-tuning device described below, similarly to the front plate 14 shown in FIG. .

In particular, another feature is to provide a rocking member which is inexpensively manufactured by integral molding using nylon-6 resin (Nylon T-422 manufactured by Toyobo Co., Ltd.) as a material to which a special reinforcing agent is added.

The swinging member 50 is provided with a reinforcing frame 52 on the swinging plate 51 and integrally integrates the shaft shaft 53 and the shaft shaft 54 of the second drive gear 45 with a plastic material. It is formed by molding.

The spindle shaft 54 includes a head portion 55, a cut neck 56 and a body portion 57 from the tip shaft thereof.

The body portion 57 is provided with a cavity 58 for saving plastic material and facilitating plastic molding.

In addition, the shaft shaft 54 is provided with protrusions 59 provided in the row of the body portion 57 so as to be hinged correctly on the chassis base front plate 14. On the other hand, the swing plate 51 is radially circumferentially around the axle shaft 53 in addition to the engagement hole 60 for latching the tension coil spring used for the bias described later, and the pair of projections 61 for hanging the clutch spring. A plurality of slip preventing grooves 62 extending in the form are formed.

In addition, the reinforcing frame portion 52 is installed to effectively use the attachment space to obtain the required strength, and the thickness of each portion is made substantially uniform so as to have a constant stretching when processing the plastic.

In consideration of these matters, the rocking member 50 is injection molded as a thermosetting resin material.

The use of the plastic material is advantageous in obtaining an inexpensive rocking member 50, but of course it can also be manufactured as a die-cast by zinc or the like like a conventional rocking plate.

According to the zinc die-cast, the error in dimension is small and the strength can be improved. On the other hand, the weight of the product is heavy and expensive.

Another important feature of the present invention lies in that the aforementioned pivotal swing member 50 can be simply pivoted without requiring any stud member on the front plate 14 of the chassis base 13. .

That is, as shown in FIG. 2, the cutout portion 63 formed in the front plate 14 has a large diameter opening portion 64, a small diameter opening portion 65, and a communication opening portion 66, and swings in the cutout portion 63. FIG. The pivot shaft 54 of the member 50 is pivoted.

It is preferable that the dimensions of each part of the shaft body 54 and the dimensions of each part of the cutout part 63 in the front plate 14 are designed in a specific relationship with each other so that the assembling work can be easily and simply performed.

Therefore, the coupling of the rocking member 50 molded as the plastic material to the chassis base 13 is easily and accurately pivoted.

In other words, the diameters of the parts 55, 56, and 57 of the shaft 54 for ease of assembly work are set to (a), (b) and (c), respectively, and the front plate 14 When the diameters of the corner portions 64, 65, and 66 of the cutout portion 63 of) are set to (d), (e), and (f), respectively, and each portion is approximately circular, the following relation Is selected.

b ≒ e f <a d <c

Therefore, with respect to the thickness t of the front plate 14, the cutout width S of the neck 56 is selected to be approximately equal or slightly larger.

Under such a condition, the pivot of the swinging member 50 with respect to the front plate 14 can be easily rotated by the large shaft opening 64 of the notch portion 63 according to the dimension relationship of b <a <c. The neck portion 56 having a circular cross section is formed by sliding the neck portion 56 along the communication opening 66 into the small-diameter opening portion 65 while being inserted into the head portion 55 and the neck portion 56. It is arrange | positioned so that rotation is possible in the small diameter opening part 65 which is substantially equivalent to this or slightly larger.

When pivoting the rocking member 50 to the front plate 14, the shape of the rocking member 50 may be changed in various ways to prevent dropout due to impact or to improve the balance between the front plate and the rocking plate.

Although these improvements will be described later, the important point is the shaft shaft 54 including the head portion 55, the neck portion 56 and the fuselage portion 57 and the large and small openings 64 of the front plate 14. And a pivot structure with a cutout portion 63 including (65). A tension coil spring 70 which always applies an elastic pressure in the direction of the uncoaxial shaft 35 to the pivoting member 50 pivoted on the front plate 14 is provided between the swinging member 50 and the front plate 14. It is installed long.

Thus, the swinging member 50 is moved to two different positions in relation to the engagement of the uncoated screw 27 and the uncoated device 16.

When the first position is in a disengaged state and the engagement between the pinion 49 of the second drive gear 45 and the pinion gear 28 of the unscrewed screw 27 is released due to the tension of the coil spring 70 described above. The second position is a case where the rocking member 50 is moved in response to the tension of the tension coil spring described above, so that the fine tuning transmission is transmitted from the pinion gear 49 to the pinion gear 28.

Here, the guide plate 72 for limiting the movement in the radial direction in the uncoordinated shaft 35 as well as the second drive gear 45 axially supported by the swinging member 50 is used. The guide plate 72 has a hole 73 for inserting the lower portion 46 of the second drive gear 45 and a hole 74 for inserting the channel selection shaft 20 as shown in FIG. Thus, the operating range of the lower portion 46 is regulated so that the pinion 49 is smoothly engaged by contacting the pitch circle of the pinion tooth 28, and the position of the guide plate 28 is adjusted to the stop member 31. Is arranged in contact with the projection (34).

Each of the teeth 43, 44, 47, and 48 of the first and second drive gears has a relatively small diameter pitch and each tooth is relatively long.

On the other hand, the teeth of the pinion tooth 49 and the pinion tooth 28 are relatively short and their diameter pitch is relatively large.

Since the tooth size is different in this way, the pinion gear 49 and the pinion gear 28 can be removed without disengaging the engagement of the first and second driving gears 40 and 45. .

The second drive gear 45 is axially supported by the friction clutch means in order to rotate the swinging member 50 as a coupling means in the crude drive transmission. That is, the friction clutch plate 75 is squeezed between the front end surface of the second drive gear 45 and the swing plate 51, and the U-shaped press clip 76 detachable as a spring for the clutch is moved to the swing plate ( The second drive gear 45, the clutch plate 75, and the swing plate 51 are fixed to each other at the end of the end plate 51 with a considerable force.

The clamping clip 76 is positioned by fitting one pair of holes 77 to one pair of projections 61 of the swinging plate 51 on one branch plate, and positioning the other branch plate at the second driving value. At the rear surface of the rear face of the gear 48 of the vehicle body 45, the shaft is aligned and elastically contacted. The pressure exerted as the elastic clip 76 must be such that it disappears at the moment when the gear 45 is about to rotate.

Therefore, when a rotational force is applied to the fine coaxial shaft 35, the frictional load on the second drive gear 45 inhibits this rotation, and the teeth engaged by the first and second drive gears 40 and 45 are engaged. Gives a separation action for these gear bodies.

By this separating action, the swing plate 51 pivots and engages the pinion gear 28 of the unscrewed screw and the pinion gear 49 of the second drive gear 45.

If the rotation of the fine coarse shaft 35 is continued again, the rotation of the gears 43, 44 of the first drive gear 40, and the gears 47 and 48 of the second drive gear 45 are performed. ) And the micro-screws 27 are adjusted in the axial direction by rotating the pinion gear 28. In this case, when the support shaft body 53 and the second drive gear body 45 are inclined in order to obtain a predetermined friction load, the load can be adjusted as the taper angle, and thus the clutch plate 75 is omitted. can do.

When the rotational force of the fine coarse shaft 35 is raised, the flat car group is not completely separated and the pivoting swing member 50 is returned to its original position by the action of the coil spring 70.

If the reverse rotational force acts on the fine tuning shaft 35, the first and second gear bodies 40 and 45 are separated again to rotate the pinion gear 28 in the opposite direction.

Summarizing the above-described rotary preset untuning device, the untuning device 16 is provided to the second drive gear 45 when the first and second positions of the swinging member 50 related to the loosening of the untuned member are changed. It has the clutch engagement means in this.

The pinion tooth 28 of the uncoated member moves a predetermined passage in accordance with the rotation of the turret body 12 of the tuner, and the pinion tooth 28 of the pinion tooth 28 of the untuned device 16 49).

When the fine tuning shaft 35 is turned to either side for fine tuning of the selected channel, the pinion gear 28 of the crude member is moved through the gear bodies 40 and 45 of the drive train. 27 is adjusted in position at the tuning coil unit 18. The specific example described above relates to a rotary preset non-tuning device, and the pivoting swing member of the present invention may also act in the same manner for the push preset non-tuning device.

Thus, before explaining another improvement of the rocking member for the purpose of the present invention, an outline of the push preset untuning device will be described with reference to FIG. 7 as another embodiment of a turret type tuner.

Here, the same parts as the above-described television tuner with the rotary preset untuning device are denoted by the same reference numerals, and other parts will be described in detail. FIG. 9 shows an exploded perspective view of the push preset VHF television tuner corresponding to FIG. 8 and consists of a substantially U-shaped chassis base 13 equipped with a turret body and a non-tuning device. It is formed of the plate 14, the top plate 15 and the back plate (not shown).

On its side, there is a short stretching portion of the top plate, which reinforces the chassis base 13 itself and bears a shield cover (not shown) attached to the opening side. The selection shaft 20 is axially supported by the bearing plate 22 which holds a pair of foot holes 23 at predetermined positions of the front plate 14.

The bearing plate 22 is formed with a hole having a suitable shape to hold the V-shaped support surface to support the selection shaft 20, and a notch washer 24 is provided to the selection shaft 20 on the V-shaped paper surface. One end of the torsion wire spring 26 to which the elastic pressure is applied is hanged on the flange portion 25.

That is, the spring 26 is fitted to the flange portion 25 installed on the elongated lower side of the cut washer 24.

In addition to connecting the front end of the selection shaft 20 to the bearing plate 22, the spring 26 imparts a biasing force, such as driving the detent, so that the clutch action of the selection shaft 20 can be achieved. It is given and it is the same structure as the above-mentioned embodiment.

On the other hand, the fine tuning shaft 135 of the non-tuning device 116 is fitted to the selection shaft 20, the key 36 is mounted at the front end thereof in the same manner as in the above-described embodiment, the selection shaft is supported to a predetermined position.

However, in this case, the rear end of the non-coaxial shaft 135 is provided with a radially extending cylindrical portion 137 and the rear side is provided with an annular serration 138 extending backward to install one clutch surface of the clutch coupling means. Configure.

On the selection shaft 20, a bearing support sleeve 78 having a through hole 79 drilled in the center thereof is installed, and one end of the coil spring 176, which is a clutch spring, is fitted therein. The other end of the clutch spring 176 abuts on the rear end of the fine coarse shaft 135, and thus the front end of the clutch spring 176 is forward by the clutch spring 176 in the state that the back pressure is not applied to the fine coaxial shaft 135. To be biased.

The front end of the bearing sleeve 78 is widened outward as shown in the figure to form a sharp corner portion 80, which is the point of the first drive gear 140.

The first drive gear 140 is an inclination gear that holds the tubular sleeve 141, and an end 142 is formed on the inner surface of the tubular sleeve 141 so that the tubular sleeve 141 is axial. The corner portion 80 of the bearing sleeve engages the end 142 when loosely fitted to the outside of the bearing sleeve 78.

Pressing the fine coarse shaft 135 to adjust the position of the end 142 of the first drive gear 140 made from the inclination gear is moved to the corner portion 80 as a point.

The rear end of the tubular sleeve 141 is formed with an annular tooth 143 protruding to the outer periphery, and a relatively small series of serrations 81 are formed on the outer periphery.

The serration 81 is engaged with the serration 138 of the fine coarse shaft 135 to constitute the clutch engagement means.

On the other hand, the annular gear 143 is engaged with the gear 147 installed in the lower portion 146 of the second driving gear 145, and the micro-screw 27 through the pinion gear 149 behind the lower portion 146. The drive transmission is carried out to the pinion difference 28 (same as the first degree), and the crude member of the tuning coil assembly is adjusted, and the inductance of the oscillating tuning coil is varied as described above. The second drive gear 145 is rotatably mounted on the shaft for the shaft of the swinging member 150 hinged to the front plate 14 of the chassis base 13 in the same manner as in the above-described embodiment.

In this case, however, it is free rotation, and thus requires no friction clutch means of the above-described embodiment.

On the other hand, the swinging member 150 is always biased in the direction of the fine coarse shaft 135 by the tension coil spring 170 whose one end is held by the cutter lip piece 71 of the front plate 14 and thus the coil spring 170. ), The biasing force is pressed downward in the state where the gears 143 and 147 of the first and second drive gears are engaged, and as a result, the first drive gear 140 is inclined.

The serrations 81 and 138, which form the clutch means as a cooperative action with the clutch spring 176 on the selection shaft which biases the fine-tuning shaft 135 forward, are always isolated. .

When the fine tuning operation of the selected channel is performed, as the fine tuning shaft 135 is pressed, the fine tuning shaft 135 moves rearward on the selection shaft 20.

At the same time as the fine-tuning shaft 135 moves backwards, the serration 138 meshes with the serration 81 of the first drive gear 140 to engage the clutch.

Since the first driving gear 140 is normally inclined, the serration 81 first engages at the lower portion of the selection shaft 20, and as a result, a force is applied to the front lower edge of the gear 140. The edge portion 80 of the support sleeve 78 is moved to the point.

Thus, approximately coaxial with the selection shaft 20, the engagement of both serrations 138, 81 of the clutch means is complete.

In addition, since the second driving gear 145 rotates against the pivoting swing member 150 and the tension coil spring 170, the pinion tooth of the uncoated member screw also rotates the pinion of the second driving gear 145. Match with on (149).

In this state, when the fine tuning shaft 135 is rotated, the fine tuning shaft and the first driving gear body are integrally rotated by clutch engagement, and this is the second driving value due to the engagement between the annular gears 143 and 147. It is transmitted to the vehicle body 145 and the microscopic screw is rotated by the engagement of the pinion gear 149, and the position thereof is adjusted.

In other words, when this adjustment is performed, the position of the pinion gear is adjusted laterally with respect to the pinion 149 in a state where the pinion gear is engaged with the pinion gear.

Next, the rocking member 50 and its pivot structure according to the present invention will be described in detail.

Mounting of the rocking member 50 to the front plate 14 is pulled in the fine coaxial direction by the tension coil spring 70 as shown in Figs. It will not drop unless it is applied to the boat.

As this fall prevention means, the shape of the notch 63 in the front plate 14 is considered.

That is, although the large diameter opening portion and the small diameter opening portion of the cutout portion may be communicated according to the pulling direction of the tension coil spring 70 as shown in FIG. 2, the large diameter opening portion 64 may be coiled with respect to the small diameter opening portion 65. It is preferable to make the trajectory of the arc arc when the axis | shaft axis shaft 54 is hinged to the notch 63 by being located in the orthogonal direction opposite to the pulling direction of 70. In this case, only the unidirectional force resisting the coil spring 70 is not easily eliminated.

Here, the exact design of the plate thickness t of the front plate 14 and the narrow width S of the neck portion 56 is extremely important for the desired rotation of the rocking plate 51, so it should be noted.

5 is a view for explaining improvement means for arranging the pivot shaft 54 at right angles to the front plate 14 to hold the swing plate 51 in parallel, and the improvement means is a protrusion on the swing member 50. It is achieved by installing 59.

The protruding portion 59 abuts the front end 14 of the swinging plate 51 or the shaft 54 on the front end 14. Preferably, the contact portion 67 is a contact having a small surface area. Install.

Such a protrusion 59 is inclined by the clearance of the thickness t and the cut width S of the plate when the oscillating plate 51 is pulled by the coil spring 70, that is, of the shaft 54. It is to prevent the inclination.

In other words, the clearance of the pivot structure inevitably generated in the molding process is virtually eliminated by laying the protrusion 59 and the contact portion 57, thereby preventing the swing plate 51 from being inclined by the coil spring 70. .

As a means for preventing such inclination, the radial length of the coil spring 70 may be increased by increasing the size of the head portion or the body portion, particularly the body portion 57, of the shaft 54. In this case, problems such as an increase in manufacturing cost or an unnecessarily large installation space occur.

For this reason, providing the protrusions 59 only in a predetermined direction and lowering the height thereof is advantageous not only for forming plastic materials but also for smoothing functions and improving work efficiency.

In order to prevent the inclination of the oscillation plate 51 and the detachment of the shaft body 54 as described above as an improvement of the protrusion 59, the second perpendicular to the right-angled stretching part in front of the protrusion is prevented in addition to the first contact portion for preventing the inclination. Can be fitted to the cutout of the front plate 14.

In this case, in order to facilitate the operation of inserting the swing plate 51 into the front plate 14, the surfaces of the head portion 55 and the body portion 57 and the neck portion 56 of the shaft body 54 are inclined surfaces. Form.

Therefore, when assembling, it is preferable to incline and insert the swinging plate 51 and to hinge to a predetermined position as the coil spring 70.

In such a structure, there is no fear that the rocking member 50 may fall off or fall off even with an external radical load, and the impact load in the shipment test of the finished product tuner, for example, application of 50G is guaranteed.

These improvements are employed in the above-described push preset and rotary set untuning devices.

6 and 7 show an improvement of the preferred rocking member 50 in the case of a rotary preset untuning device.

The 1st improvement point installs the perpendicular | vertical standing board 68 to the radial front-end | tip of the swing plate 51 in attaching the 2nd drive gear 45 to the support shaft body 53 via a friction clutch plate. This is to insert the clutch elastic clip 76 using this.

When the elastic clip 76 is inserted into the front plate of the rocking plate 51, the friction clutch plate 75, and the second drive gear 45, the insertion hole of the elastic clip 76 is usually narrower than the thickness of the object to be compressed. Therefore, any one requires an insertion jig. The role of the insertion jig is a standing plate 68 provided at the front end of the swinging plate 51. The installation of the elastic clip 76 is extremely simple and easy by laying the standing plate.

In this case, when the standing plate 68 is used as a guide, the standing plate 68 has a height slightly lower than that of the reinforcing frame 52 depending on the size of the insertion hole of the elastic clip 76, and is integrally formed with the rocking plate 51. Of course, economic effects can be achieved. The second improvement point is the clutch plate 75 of the swing plate 51 as shown in FIG. 6 in order to ensure the frictional contact between the swing plate 51 and the clutch plate 75 and to stabilize the drive torque. A suitable number of small globules 62 are provided at the contact portion, thereby preventing slippage of the clutch plate 75, and as a result, a constant frictional force generated between the friction clutch plate 75 and the second drive gear 45. As a result, the torque of the second drive gear 45 is stabilized.

As described above, the non-tuning device according to the present invention is inexpensive because the work of fitting the rocking plate to the cutout portion of the front plate is facilitated, and the rocking plate is resin-molded integrally with the shaft or the standing plate. Industrial value, such as suitable for mass production, can be raised.

Claims (1)

A turret body 12 rotatably coupled to the chassis base 13 with a plurality of tuning coil units 18 corresponding to different television channels, each of which has its own coarse screws 27; When the turret body 12 is rotated to a predetermined position, a non-tuning device 16 for adjusting one of the uncoated screws 27 is provided, and the non-tuning device 16 is located in front of the chassis base front plate 14. Uncoiled shaft 25, which is stretched, is always biased on the side of the uncoordinated shaft 35 pivoted to the chassis base front plate, and is coaxially mounted with the swinging member 50 and the uncoiled shaft 35 that are pivoted. The large swing opening portion 64 causes the swing member 50 to be moved by the force applied to the first drive gear 40, the second drive gear 45 hinged to the swing member 50, and the fine motion shaft 35. A rocking plate 51 is pivotally rotated to the small-diameter opening 65, and the small-diameter opening 65 of the rocking member 50 allows the rotation of the fine-tuning shaft 35 to be rotated. It is a position to transmit and adjust to the screw (27), the large diameter opening portion 64 is coupled to the non-tuning device 16 in the untuned member, so that the position to select the channel in accordance with the rotation of the turret body (12) In the preset non-tuning device 16 of a turret type television tuner, the head 55, the neck 56, and the fuselage 57 are mounted on the shaft 54 for the shaft of the swing plate 51, and the oscillation is performed. It is molded integrally with the plate 51 and inserted into the notch portion 65 formed in the chassis base front plate 14 to which the neck 56 of the shaft 54 for pivoting is pivoted. Untuned tuner.