JPH0629815Y2 - Cassette vibration prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for preventing vibration of a tape cassette mounted in a cassette mounting portion of a tape recorder body.

[Prior Art] Conventionally, after inserting a tape cassette into a cassette holder (cassette insertion portion) of a cassette box, and then storing this cassette box in a cassette mounting portion of the tape recorder main body, the tape cassette is mounted in the tape recorder main body. There is known a tape recorder which is designed to do so.

In such a tape recorder, when music or voice is reproduced and listened to, the reproduced sound sometimes includes noise due to the vibration of the tape cassette. For example, if there is a space between the cassette mounting portion and the tape cassette, the vibration of the motor is transmitted to the tape cassette during reproduction, which causes noise.

In order to prevent such a vibration of the tape cassette, conventionally, the tape cassette is partially mounted on the cassette mounting portion by an elastic member such as a leaf spring and a coil spring, and the amount of the tape cassette is about 100 to 250 g.
Pressing with g is performed.

[Problems to be Solved by the Invention] However, in such a configuration in which the tape cassette is partially pressed, the entire tape cassette cannot be sufficiently vibration-isolated, and the vibration isolation is not sufficient.

In view of this, an object of the present invention is to make it possible to sufficiently and satisfactorily isolate the entire tape cassette.

[Means for Solving the Problems] This invention mounts the tape cassette on the tape recorder body by inserting the tape cassette into the cassette holder of the cassette box and then storing this cassette box in the cassette mounting portion of the tape recorder body. It is assumed that the tape recorder is designed to do so.

The cassette holder is a separate body from the cassette box, and is movably attached to the cassette box with a spring member interposed therebetween.
An elastic member is attached to the surface facing the side surface of the tape cassette to be inserted, and a guided portion that regulates the moving direction of the cassette holder is provided.
A guide part is provided corresponding to the guided part of the cassette holder, and when the cassette box is stored in the cassette mounting part, the guided part of the cassette mounting part guides the guided part of the cassette holder to move the cassette holder. The direction is regulated, and the elastic member attached to the cassette holder is vertically pressed against the side surface of the tape cassette.

[Operation] In the above-described configuration, when the cassette box 2 is stored in the cassette mounting portion 11, the guide portion 12 of the cassette mounting portion 11 guides the guided portion 35 of the cassette holder 3 to move the cassette holder 3 in the moving direction. Is regulated, and the elastic member 4 attached to the cassette holder 3 is vertically pressed against the side surface of the tape cassette 5. Therefore, the entire tape cassette 5 is sufficiently and satisfactorily vibration-proofed.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic exploded perspective view of this example. In the figure, 1 is a tape recorder body, and 1
1 is a box-shaped cassette mounting portion.

Further, 2 is a cassette box, and 3 is a cassette holder into which a tape cassette 5 (not shown in FIG. 1) is inserted.

Shafts 31 extending outward are fixed to both left and right ends of the cassette holder 3, and openings 21 are formed in both side surfaces of the cassette box 2.
By inserting the shaft 31 of the cassette holder 3 into the opening 21 of the cassette box 2 from the inside, the cassette holder 3 is rotatably attached to the cassette box 2 about the shaft 31. A slit is formed in the opening 21 so that the shaft 31 can be easily inserted into the opening 21.

A compression coil spring 32 is arranged between the back surface of the cassette box 2 and the front surface of the cassette holder 3. That is, as shown in FIG. 3, the spring 32 is inserted into the spring insertion portion 22 formed on the rear surface side of the cassette box 2 and one end side is fixed, and the multi-end side of this spring 32 is the portion of the shaft 31 of the cassette holder 3. Abutted against. As a result, the cassette holder 3 is placed in a state of being biased to the back side by the spring 32.

An elastic member 4 is attached to the back side of the cassette holder 3. In this case, the elastic member 4 has a shape corresponding to the thin portion of the tape cassette 5.

Further, arm portions 33 extending to the back side are fixed to both side surfaces of the cassette holder 3, and pins 34 extending outward are planted at the tips of the arm portions 33. The arm portion 33 and the pin 34 constitute a guided portion 35 that regulates the moving direction of the cassette holder 3.

Further, leg portions 23 are formed on both side surfaces of the cassette hook 2 so as to extend downward. A shaft 24 extending outward is erected at the end of the leg portion 23. Although not shown, the leg portion 23 is inserted into the tape recorder body 1 from the cassette mounting portion 11, and the shaft 24 is rotatably fixed to the tape recorder body 1. As a result, the cassette box 2 rotates about the shaft 24 and is detachably attached to the cassette mounting portion 11.

Further, although not described above, the cassette holder 3 is provided at the center of both side surfaces of the cassette mounting portion 11 of the tape recorder body 1.
The guide portion 12 is provided corresponding to the guided portion 35. The guide portion 12 guides the pin 34 of the cassette holder 3 so as to pass along the circumference around the fixed position of the shaft 24 of the cassette box 2 and has a stepped arc portion 12a.
And a linear portion 12b formed in the shape of a rail that guides in the horizontal direction.

Further, as shown in FIG. 3, a pair of protrusions 25 extending to the back side are provided on the back side of the cassette box 2. When the cassette box 2 is pulled out from the tape recorder body 1, the projection 25 penetrates the notch 36 formed on the lower end side of the cassette holder 3 to press the thick portion of the tape cassette 5. To be

FIG. 2 shows a perspective view when the respective members are assembled as described above.

In the above configuration, the tape cassette 5 is inserted into the cassette holder 3 as shown in FIG. 3A in the open state where the cassette box 2 is pulled out from the tape recorder main body 1. In this state, the protrusion 25 penetrates the notch 36 formed on the lower end side of the cassette holder 3 and presses the thick portion of the tape cassette 5, so that the thick portion of the tape cassette 5 is attached to the cassette holder 3. The tape cassette 5 can be easily pulled out without being caught by the lower end of the elastic member 4 thus formed. In addition, in FIG.
Is a pair of cassette pressing members that support the upper portion of the tape cassette 5, and 14 is the lower portion of the tape cassette 5, and 15 is a capstan.

When the cassette box 2 is pressed from such a state, the cassette box 2 rotates about the shaft 24 and is housed in the cassette mounting portion 11. In this storing process, as shown by the arrow in FIG. 3B, the pin 34 of the cassette holder 3 is sequentially guided along the arc portion 12a and the straight portion 12b. In this case, when the pin 34 is guided along the arc portion 12a, both the cassette box 2 and the cassette holder 3 rotate about the shaft 24. However, when the pin 34 is guided along the straight line portion 12b, the cassette box 2 rotates and moves around the shaft 24, but the cassette holder 3 moves linearly in the horizontal direction and is attached to the cassette holder 3. The elastic member 4 comes into vertical contact with the side surface of the tape cassette 5.

In this case, since the tape cassette 5 contacts the cassette pressing members 13 and 14 while the pin 34 moves along the arcuate portion 12a and the straight portion 12b of the guide portion 12, the spring 32 is gradually compressed, and as a reaction thereof, the elastic member is elastic member. 4 is brought into contact with the side surface of the tape cassette 5 more strongly.

Then, in the closed state where the cassette box 2 is completely stored in the cassette mounting portion 11, as shown in FIG. 3C, the elastic member 4 attached to the cassette holder 3 is vertically attached to the side surface of the tape cassette 5. It will be in a state of being pressed under a load of about 1 kg.

As described above, according to this example, since the elastic member 4 attached to the cassette holder 3 is vertically pressed against the side surface of the tape cassette 5 in the closed state where the cassette box 2 is stored in the cassette mounting portion 11, The entire tape cassette 5 is sufficiently and satisfactorily vibration-proofed. Therefore, it is possible to reduce the generation of noise caused by the vibration of the tape cassette 5 due to the vibration of the motor, and it is possible to improve the sound quality.

FIGS. 4A and 4B show vibration levels at various frequencies of the tape cassette 5 in the conventional and cassette cassette recorders, respectively. As is clear from this figure, in this example, it is understood that the vibration level is lowered particularly in the X range.

Further, according to this example, in the open state in which the cassette box 2 is pulled out from the tape recorder body 1, the projection 25 penetrates the notch 36 formed at the lower end side of the cassette holder 3 and the thickness of the tape cassette 5 is increased. Since the portion is pressed, the thick portion of the tape cassette 5 is not caught on the lower end of the elastic member 4 attached to the cassette holder 3, and the tape cassette 5 can be easily removed.

As described above, according to the present invention, when the cassette box is stored in the cassette mounting portion, the elastic member attached to the cassette holder is vertically pressed against the side surface of the tape cassette. It is possible to sufficiently and satisfactorily isolate the entire tape cassette. Therefore, it is possible to reduce the generation of noise due to the vibration of the tape cassette due to the vibration of the motor, and it is possible to improve the sound quality.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a diagram for explaining its operation, and FIG. 4 is a diagram showing vibration characteristics. 1 …… Tape recorder main body 2 …… Cassette box 3 …… Cassette holder 4 …… Elastic member 5 …… Tape cassette 11 …… Cassette mounting part 12 …… Guidance part 25 …… Protrusion 34 …… Pin 35 …… Guidance Department

Claims (1)

[Scope of utility model registration request] 1. A tape recorder in which the tape cassette is inserted into a cassette holder of a cassette box, and then the cassette box is housed in a cassette mounting portion of a tape recorder body so that the tape cassette is mounted in the tape recorder body. In the above, the cassette holder is separated from the cassette box, and is movably attached to the cassette box with a spring member interposed therebetween. An elastic member is attached to the surface facing the side surface,
A guided portion for restricting the moving direction of the cassette holder is provided, a guide portion is provided in the cassette mounting portion so as to correspond to the guided portion of the cassette holder, and the cassette box is stored in the cassette mounting portion. At this time, the guide portion of the cassette mounting portion guides the guided portion of the cassette holder to regulate the moving direction of the cassette holder, and the elastic member attached to the cassette holder is attached to the side surface of the tape cassette. The cassette vibration prevention device is characterized in that it is pressed against the vertical direction.