JPH0445193Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a damper device for a cassette door.
In particular, the present invention relates to a damper device for a cassette door in a recording and reproducing apparatus having a plurality of mechanisms and capable of simultaneously recording and/or reproducing a plurality of cassette tapes.

[Conventional technology]

Recording/playback devices such as cassette decks and cassette players (hereinafter referred to as ``tape recorders'') that use cassette tapes to perform recording/playback have been rapidly developing and becoming popular. (also written as)
Tape recorders have been developed and are becoming popular, allowing dubbing from one tape to one or more other tapes. Such a tape recorder will be explained with reference to FIG. In order to avoid complexity, an example having only two mechanisms (so-called double cassette type) will be described. This type of tape recorder (cassette deck)
As shown in FIG. 3, one power switch 5,
The front panel 1 is provided with two cassette doors 4a, 4b, a plurality of operation buttons 2a, 2b, etc. Of the operation buttons 2a and 2b, 3a and 3b are stop/eject keys that serve both to stop and eject.By pressing these keys 3a and 3b twice while the tape is running, or when the tape is stopped or when the tape is not loaded. By pressing once, the cassette doors 4a and 4b are opened, respectively, via an eject mechanism (not shown).

FIG. 4 is a back view of the cassette doors 4a, 4b and their opening mechanisms as seen from the back side of the front panel 1, and FIG. 5 is a side view of the same. In these figures, 5a and 5b are square holes provided in the front panel 1 for fitting the cassette doors 4a and 4b, respectively. 6a, 6b are cassette doors 4a, 4b
A support shaft 9 is rotatably supported by bearings 8a and 8b mounted on the front panel 1.
Cassette doors 4a, 4b with a, 9b as rotation axes
These are rotating parts for respectively rotating (opening the lid) in the direction of arrow X. These rotating parts 6a, 6b are integrally molded with the cassette doors 4a, 4b, respectively. 7
a and 7b have support shafts 9 on parts of the rotating parts 6a and 6b, respectively.
These teeth are formed in an arc shape with a and 9b as the center points, and these teeth mesh with the gear parts 12a and 12b on the damper devices 10a and 10b, respectively, so that they are supported by the respective support parts 11a and 11b. Damper devices 10a and 10b fixed to the front panel 1
Due to the viscosity of the cassette doors 4a and 4b, they also rotate slowly. Note that the damper devices 10a, 1
The viscosity of 0b is determined by the gear parts 12a, 12b and the support part 1.
This is achieved by interposing a viscous material such as grease between 1a and 11b to bring them into close contact.

[Problem that the invention attempts to solve]

In the conventional cassette door damper devices 10a, 10b as described above, gear portions 12a, 12
However, if too much viscous material is applied, both (gear part and support part)
There was a drawback that gaps were likely to form between the two, resulting in poor adhesion and a difference in the damper effect between the left and right sides. In addition, the magnitude of the braking force due to viscosity depends on the size of the gear parts 12a and 12b and the support parts 11a and 11b.
In particular, the amount of the viscous material applied between the two and the location where the viscous material is applied (the intervening location of the viscous material is the gear part 12a, 1
The braking force increases as the distance from the rotation axis of gear part 2b increases due to the lever principle.
Although it is easy to make the sizes of the damper devices 10a and 12b and the support portions 11a and 11b the same, it is quite difficult to make the amount of the viscous material and the position at which it is applied constant.
A difference tends to occur in the braking force of the cassette doors 4a and 4b, and as a result, a difference also occurs in the opening speed of the cassette doors 4a and 4b.
In particular, when the stop/exit keys 3a and 3b are pressed at the same time, the difference in opening operation is noticeable and unsightly, which lowers the product value.

[Means for solving problems]

The present invention relates to a cassette door damper device which is disposed on the front panel of a cassette tape recorder and which brakes the opening operation of a plurality of cassette doors which are opened and closed by independent mechanisms. By comprising a plurality of gear parts that mesh with the teeth provided on the rotating part and one spring that presses each side of the plurality of gear parts with equal biasing force, the above-mentioned problems can be solved. .

〔Example〕

An embodiment of the cassette door damper device of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a cassette door damper device 20 of the present invention, and FIG. 2 is a back view of the lid opening mechanism of a tape recorder equipped with the damper device 20, as viewed from the back side of the front panel 1. In these figures, the same components as those in the conventional example shown in FIGS. 4 and 5 are given the same reference numerals, and detailed explanation thereof will be omitted. As shown in FIG. 1, the cassette door damper device 20 of the present invention includes a mounting portion 21 for mounting on the front panel 1, and support portions 22a and 22 provided on both sides of the mounting portion 21, respectively.
b, gear parts 23a and 23b rotatably fitted and supported further outside of the support parts 22a and 22b via a viscous material, and these gear parts 23a and 23b.
It is composed of one spring 26 that elastically presses the side surfaces 24a and 24b. This spring 26 is made of a material with a large elastic modulus, such as rod-shaped phosphor bronze, and is slidable in the axial direction (direction of arrow Y) by a boss 28 formed on the front panel 1. Retained. Then, it is bent almost at right angles near points a and b, and furthermore, points a and
Each tip 26 is approximately equidistant from b.
a and 26b are bent toward the gear parts 23a and 23b, respectively, and press (bias) force to the recesses 25a and 25b formed near the rotation center axes of the gear parts 23a and 23b among the respective side surfaces 24a and 24b. They are in contact with each other with approximately equal contact area. Therefore, there is no risk that the spring 26 will fall off, and because of this configuration, the gear parts 23a, 23b receive equal pressing force from the spring 26, so that the tip parts 26a, 26b and the side faces 24a, 24b
The frictional force at both points of contact with the viscous material is the same, so even if there is variation in the amount of viscous material applied, such as when the amount of viscous material applied is too large, the excess viscous material will be squeezed out by the equal pressing force from the spring 26, and the viscous material will become viscous. are approximately equal, and the damper effect (braking force) can always be maintained in an ideal state.

FIG. 2 shows a state in which such a damper device 20 is attached to a lid opening mechanism of a double cassette type tape recorder. The installation conditions include the gear parts 23a and 23b of the damper device 20.
are the gear parts 7a and 7b on the rotating parts 6a and 6b side, respectively.
It can be attached by fixing the attachment part 21 to the back surface of the front panel 1 so as to mesh with the attachment part 21.
With this configuration, almost equal braking force is applied to the opening and closing operations of the cassette doors 4a and 4b using the support shafts 9a and 9b as rotation axes, so that when the stop/eject keys 3a and 3b are pressed at the same time, The cassette doors 4a and 4b open at approximately the same speed, enhancing the luxury of the product. Since there is only one mounting part 21, the amount of work is reduced compared to mounting the separate damper devices 10a and 10b shown in FIG. 4 by fixing their supporting parts 11a and 11b to the front panel 1, respectively. It also has the advantage of being reduced by half.

In the above explanation, we have explained an example in which a cassette door damper device is installed in a double cassette type tape recorder, but the present invention is not limited to this.
Multiple sets of cassette doors are installed side by side,
Of course, the present invention can also be applied to arrayed tape recorders.

〔effect〕

Since the damper device of the cassette door of the present invention is constructed as described above, the rotating part of the damper device is pressed with the same elastic force by the spring, and even if too much viscous material is applied, only the necessary amount will come out. Because they protrude, there is no risk of gaps being created between the gear part and the support part, and good adhesion is always maintained, which makes the opening speeds of multiple cassette doors equal to each other, which enhances the luxury of the product. This has practical effects.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the cassette door damper device of the present invention, Figure 2 is a rear view of the lid opening mechanism of a tape recorder equipped with the damper device, seen from the back side of the front panel, and Figure 3 is a conventional and FIG. 4 is a front view of the front panel of a tape recorder that can be equipped with the damper device of the invention, FIG. FIG. 1... Front panel, 4a, 4b... Cassette door, 6a, 6b... Rotating part, 7a, 7b... Teeth, 8a, 8b... Bearing, 9a, 9b... Support shaft, 20... Damper Device, 21... Attachment part,
22a, 22b...support part, 23a, 23b...
Gear part, 24a, 24b...Side surface, 25a, 25
b... recess, 26... spring, 28... boss.

Claims (1)

[Claims for Utility Model Registration] (1) A cassette door damper device for braking the opening operation of a plurality of cassette doors, which are disposed on the front panel of a cassette tape recorder and are opened and closed by independent mechanisms. , comprising a plurality of gear portions that mesh with tooth portions provided on the rotating portion of each of the cassette doors, and one spring that presses each side of the plurality of gear portions with an equal biasing force. A damper device for a cassette door, characterized in that the opening speeds of the plurality of cassette doors are made equal to each other. (2) The spring is held slidably in the axial direction by a boss formed on the back surface of the front panel, and the plurality of gear parts are attached to the back surface of the front panel by a common attachment part via their respective holding parts. A damper device for a cassette door according to claim 1, wherein the damper device is fixed to a predetermined location of the cassette door. (3) Utility model registration claim 1, characterized in that recesses are formed in the side surfaces of the plurality of gear parts in the vicinity of the rotation center axis of the gear parts, respectively, for abutting both ends of the springs. Damper device for the cassette door described in Section 1. (4) A utility model registration claim characterized in that both ends of the spring are bent toward the plurality of gear parts, and the concave parts are brought into contact with each other with a pressing force with approximately equal contact area. Range 3rd
Damper device for the cassette door described in Section 1. (5) The damper device for a cassette door according to claim 2, characterized in that a viscous material is interposed between the plurality of gear parts and each holding part.