JPH0328599Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present application relates to a channel selection member display device for a push-button tuner that is particularly effective for dental radio receivers.

Prior Art and Problems The front and rear plates of a conventional device frame include an operating member having a main drive gear on a shaft rod, a tuning piece that is screwed into the shaft rod with a threaded portion and moves back and forth, and a driven gear that can mesh with the main drive gear. A channel selection member having gears is supported so as to be able to move back and forth as well as rotatably, and the operation member moves the channel selection member forward and the forward movement state is maintained by a lock plate. The system is configured to perform channel selection by abutment pressure contact between a channel selection piece with a switch and a slide plate which is always elastically biased and can move back and forth, and to perform a preset operation by meshing a driving gear and a driven gear. A push-button tuner is known, for example, from Japanese Utility Model Publication No. 57-33647 to Japanese Patent Application Laid-Open No. 59-12615, and a display device for displaying the channel selection member in the push-button tuner having such a configuration is used. as,
Until now, there was no suitable one.

Purpose, structure, and operation of the invention Therefore, the present application aims to accurately control the tuning member during tuning by utilizing the fact that the tuning member in the tuning state is located in the forward movement state in this type of push button type tuner. The present invention proposes a display device for displaying images, and examples thereof will be described in detail below with reference to the drawings.

The present application also applies to a push-button tuner in which a device frame is equipped with a plurality of tuning devices in which one tuning member corresponds to one operating member, as shown in Japanese Utility Model Publication No. 57-33647. However, as a preferred embodiment, a push-button tuner is developed by the applicant and is equipped with a tuning device in which two tuning members are arranged on the left and right positions of one operating member. An example case will be described in detail below.

As shown in FIGS. 1 to 3, 1 is an operating member consisting of a shaft 4 having a push button 2 at one end and a main drive gear 3 in the middle, and 5a and 5b are paired with the operating member 1. A tuning member constituting a tuning device, which includes a shaft rod 6, a threaded portion 7, and a tuning piece 8 that is screwed into the threaded portion 7 and moves in the axial direction as the shaft rod 6 rotates.
It comprises a driven gear 9 and a guide piece 10 whose front and rear parts 10a and 10b are fitted into the shaft rod 6 so as to sandwich the threaded part 7 therebetween, and which is fixed in the axial direction by a retaining ring 11. operating member 1 and channel selection member 5a,
5b are mounted on the front and rear plates 12' and 12'' of the container frame 12 so as to be rotatable and movable back and forth, respectively, and to be in pressure contact with the front plate 12' of the container frame by springs 13 and 14, respectively, in an inactive state. Between the operating member 1 and the two left and right channel selection members 5a, 5b, there is a channel selection member 5a, 5b that is automatically switched each time the operating member 1 moves forward against the spring 13, and alternates with the channel selection members 5a, 5b. A switching mechanism 15 that engages in the forward direction is provided, and the channel selection device configured in this manner is connected to the device frame 12.
It is equipped with multiple units.

A lock plate 1 is provided on the device frame 12 to lock the channel selection member moving forward in cooperation with the operating member 1 in its forward movement state.
6, a slide plate 17 which is freely movable back and forth and is always biased rearward and is in pressure contact with the channel selection piece 8 of the channel selection member which is locked in the forward movement state, and this slide plate 17
and a variable tuning section 18 supporting a variable element 18'.

As shown in FIG. 4, the lock plate 16 is movable laterally in a direction perpendicular to the operating member 1 and is always elastically biased in one direction by a spring 21, and has a channel selection member on its surface. When moving forward in cooperation with the operating member 1, the guide member 10 attached to it
A sloped edge 20a that acts with a locking piece 19 protruding downward from the front piece 10a of the front piece 10a to move the lock plate 16 laterally against the spring 21; Locking stepped portion 2 that locks with piece 19
A locking groove 20 having a diameter of 0b is provided facing each channel selection member, and when the locking piece 19 acts on the sloped edge 20a and the lock plate 16 moves laterally, the lock plate 16 has already moved forward. The other tuning members held in the moving state come off the lock plate 16 and the spring 1
4 will automatically return. Further, a guide groove 22 is provided on the bottom plate 12 of the container frame, facing each channel selection member 1, and engages with the locking piece 19 to guide its forward and backward movement.

Therefore, from the non-tuning state in which the operating member 1 and the channel selection members 5a and 5b are urged by the springs 13 and 14, respectively, and are in pressure contact with the front plate 12' of the device frame, the push button 2 is pressed to switch the operating member 1. When the channel moves forward, one of the channel selection members engaged through the switching mechanism 15 also moves forward, and this is locked by the lock plate 16, and the channel selection piece 8 comes into pressure contact with the slide plate 17 to achieve channel selection. This is the same as before.

In the present application, in the above, the tip of the locking piece 9 provided on the guide piece 10 is bent or colored in order to enlarge the display surface, so that the display piece 23
In addition, when incorporating it into, for example, a cassette tape recorder A as shown in FIG.
In addition, window holes 25 are provided at respective positions facing the guide grooves 22 provided in the bottom plate 12 of the container frame, and facing the display piece 23 when the channel selection member is locked in the forward movement state. By doing so, the channel selection member in the channel selection state is displayed.

In the figure, B indicates a push-button tuner, 26 a speaker, 27 a cassette loading section, and 28 a cassette operation button.

Effects of the Invention As described above, the present invention has the advantage that the structure is extremely simple and that the channel selection member in the channel selection state can be reliably displayed.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a partially omitted plan view of the main parts, and FIG.
A line sectional view, Figure 3 is a - line sectional view of Figure 1,
FIG. 4 is a partial plan view clearly showing the lock plate, and FIG. 5 is a front view of the push-button tuner installed in the cassette tape recorder. In the figure, 1 is an operating member, 5a and 5b are channel selection members, 8 is a channel selection piece, 10 is a guide piece, 12 is a container frame, 13 and 14 are springs, 15 is a switching mechanism, 16 is a lock plate, and 17 is a Slide plate, 18 variable tuning section, 19 locking piece, 2
0 is an engagement groove, 22 is a guide groove, 23 is a display piece, 24
2 is a display section, and 25 is a window hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) On the front and rear plates of the device frame, an operating member having a driving gear on a shaft rod, a tuning piece that is screwed into the shaft rod with a threaded portion and moves back and forth, and the driving gear A guide piece having a driven gear that can be engaged with a driven gear and a locking piece that is slidably engaged with a guide groove provided on the bottom surface of the container frame, and a tuning member having a channel selection member that can be freely moved back and forth and rotatably supported, and a lock plate disposed on the device frame that locks with a locking piece provided on the channel selection member when the channel selection member moves forward in cooperation with the operating member, and maintains the forward movement state of the channel selection member;
a slide plate that is freely movable back and forth and comes into contact with the tuning piece of the tuning member held by the lock plate;
In a push-button tuner comprising a variable tuning section that is variable by the back and forth movement of the slide plate,
A display piece is provided at the tip of the locking piece, and a display part provided opposite to the bottom surface of the container frame faces each guide groove and faces the display piece of the channel selection member held in the forward movement state. A channel selection member display device for a push-button tuner, which is provided with a window hole at each position. (2) A channel selection member display device for a push-button tuner according to claim 1 of the utility model registration, which comprises a display piece provided by bending the tip of a locking piece. (3) A channel selection member display device for a push-button tuner according to claim 1 of the utility model registration claim, which comprises a display piece provided by coloring the tip of the locking piece.