JP3272040B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette type recording / reproducing apparatus, and more particularly to a recording / reproducing apparatus in which a cassette detecting switch for detecting the presence or absence of a tape cassette and a cassette pressing spring for positioning the cassette are used. It is.

[0002]

2. Description of the Related Art Conventionally, in a cassette type tape recorder, a cassette detection switch mechanism for detecting the presence or absence of a cassette in a cassette insertion portion on a mechanical deck, and a head in which a tape cassette inserted in the cassette insertion portion is headed. And a cassette pressing spring mechanism for biasing and positioning to the side. These cassette detection switches and cassette holding springs have different purposes, and are separately provided because they are indispensable in the structure of the electronic mechanical deck.

[0003]

In the conventional cassette type tape recorder constructed as described above, it is difficult to dispose the cassette detection switch mechanism and the cassette holding spring mechanism in a limited space on the mechanical deck. Other mechanisms are also constrained, which also hinders miniaturization of the tape recorder. In addition, the necessity of separately providing the cassette detection switch mechanism and the cassette restraining spring mechanism inevitably increases the number of components, which has been a bottleneck in cost reduction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a recording / reproducing apparatus in which a single member can be used as a cassette detection switch mechanism and a cassette holding spring mechanism. Aim.

[0005]

In order to achieve the above-mentioned object, a recording / reproducing apparatus according to the present invention has a cassette detecting switch function for detecting the presence or absence of a cassette in a cassette insertion portion, and records a cassette in an inserted state. A cassette pressing spring function for biasing and positioning the spring toward the head side of the reproducing apparatus ,
A cover consisting of two leaf-shaped contact pieces having connection terminals at the base.
Set detection and holding mechanism and cassette detection and holding mechanism
The main body part through which the connection terminals of the
Provided on the body, together with the main unit, a cassette detection and suppression mechanism
From a pair of hooks for engaging and fixing to the circuit board
The cassette detection and holding mechanism is fixed to the circuit board.
The connection terminals are electrically connected to the terminal holes on the circuit board.
It is intended to be continued .

[0006]

In the recording / reproducing apparatus according to the present invention, the half of the tape cassette presses the cassette detection switch of the cassette detection / suppression mechanism, and the cassette is inserted. The cassette half is electrically detected to be inserted into the cassette insertion portion, and the cassette half is urged toward the head by the cassette holding spring of the cassette detecting / holding mechanism to perform positioning of the tape cassette.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a mechanical deck of a cassette type tape recorder, and FIG. 2 is a detailed cross-sectional view of a cassette detecting and suppressing mechanism according to the present embodiment and an attached state thereof.

In FIG. 1, a pair of a tape take-up reel base 2 and a tape supply reel base 3 are mainly arranged on a mechanical chassis denoted by reference numeral 1, a head 4 is provided at a front side, and cassettes are provided at right and left sides of the head 4. A pair of positioning guides 5,
5 and a motor 6 for driving the reel are mounted respectively. A circuit board 7 for electrically connecting each mounted component on the mechanical chassis 1 is disposed on the back side of the mechanical chassis 1 described above.

The cassette detecting and suppressing mechanism 8 is opposed to the head 4 with the two reel bases 2 and 3 interposed therebetween.
Is mounted on the circuit board 7 described above and rises at the center of the cassette insertion portion on the mechanical chassis 1.

Hereinafter, the above-described cassette detecting and suppressing mechanism 8 will be described.
Will be described with reference to FIG. The cassette detecting and suppressing mechanism 8 has a main body 9 made of a plastic molding material at its base. From the main body 9, two (front and rear) leaf (leaf spring) contact pieces 10, 11 made of front and rear parallel conductive members are formed. Erect,
Contact points 10a and 11a are formed opposite to the upper end portions of both contact pieces 10 and 11, respectively. These contact pieces 10, 11
Also serves as a cassette holding spring action.

A spacer 12 made of a plastic molding material is inserted into and fixed to a lower portion of the rear contact piece 11, and the contact piece 10 and 11 are held at a constant interval by the spacer 12. Then, a cover body 13 made of a non-conductive member is fixed to the spacer 12 described above, and the two contact pieces 10 and 11 are fixed.
Is covering the top. The cover 13 is fixed by a separator 14 inserted through the rear contact piece 11.

On the other hand, a switch operating portion 16 made of a plastic molding material is fixed to the upper front surface of the front contact piece 10 via a separator 15, and an operating contact 17 of the switch operating portion 16 is attached to the cover 13 described above. It protrudes forward from the formed slit 18.

The contact piece 1 is provided on the back surface of the main body 9 described above.
Connection terminals 10b, 11b made of a member integral with 0, 11
Also provided are hook portions 19, 19 which are elastically deformable and are fixed to the circuit board 7 integrally facing each other from the main body 9.

The cassette detecting and suppressing mechanism 8 constructed as described above pushes the hooks 19, 19 of the main body 9 into the opening 20 formed in the circuit board 7 from above.
The hooks 19, 19 are elastically deformed and engaged with the edges of the opening 20, so that the main body 9 is firmly fixed to the circuit board 7. Can be connected electrically.

The above-described cassette detecting and suppressing mechanism 8 operates as follows. When the tape cassette C indicated by a virtual line is inserted into the cassette insertion portion as shown in FIG. 3, the operation contact 17 of the switch operation unit 16 is pressed by the tape cassette C and retreats. Due to the retreat of the operating contact 17, the front contact piece 10 bends backward, and its contact 10a electrically contacts the contact 11a of the rear contact piece 11, and the connection terminal 10
A current flows through the circuit board 7 via the terminals b and 11b, and it can be detected that the tape cassette C has been inserted into the cassette insertion portion.

On the other hand, simultaneously with the pressing operation of the operation contact 17 by the tape cassette C, the cassette detecting and suppressing mechanism 8 causes the two contact pieces 10 and 11 to move the two contact pieces 10a and
11a is elastically deformed and warped rearward in the state of contact. For this reason, since the contact pieces 10 and 11 also serve as the cassette suppressing spring function as described above, the contact piece 1
The tape cassette C is urged toward the head 4 by the elastic restoring force of 0 and 11, and the tape cassette C can be positioned by pressing the tape cassette C against the guides 5 and 5 (see FIG. 1). Further, the cassettes 10 and 11
To explain the operation of the spring, the cover 13 is
Is fixed by the separator 14 inserted into the one contact piece 11.
The tape cassette C is inserted and the operation contact 17
The two contact pieces 10 and 11 are pushed through, and the cover body 13 is separated.
It is pushed backward by the generator 14. Cover body 13 is pressed
The spacer 12 fixed to the contact piece 11 is pushed.
You. Here, the distance of the spacer 12 from the main body 9 is short.
Since the moving distance is short with respect to the separator 14, the contact piece 11
Acting as a fulcrum, the spacer 12
Rotate to the front side, thereby operating the contact piece 10
The effect of pushing back the bending caused by the pressure from the child 17
As a result, the holding force of the tape cassette C is increased.
Can be made.

Here, since the above-mentioned contact pieces 10 and 11 also function as a cassette suppressing spring, a hard material may be used to apply a predetermined spring pressure to the contact pieces 10 and 11, Need to be thicker. Incidentally, the contact spring pressure used in the tape recorder of this embodiment is set to 200 to 300 g.

Since the recording / reproducing apparatus according to the present embodiment is constructed as described above, a cassette detecting switch mechanism for detecting that a tape cassette has been inserted into the cassette inserting portion, and a cassette holder for positioning the tape cassette. The spring mechanism can be shared by one component member, and the number of components can be reduced, so that the assembly of the tape recorder can be simplified and the cost can be reduced. Further, the degree of freedom of components mounted on the mechanical deck can be increased.

Further, since the cassette detecting and suppressing mechanism 8 is disposed at the center of the cassette inserting portion, the spring pressing force of the cassette detecting and suppressing mechanism 8 presses the center of the tape cassette. Thus, the tape cassette can be biased toward the head 4 in a well-balanced position.

Further, by using the leaf-shaped contact pieces 10 and 11 as the cassette detection switch, it can be arranged on the same circuit board as the other detection switches, thereby improving the dimensional accuracy with the tape cassette. In addition, a constant load at the time of removing the tape cassette is achieved.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, the cassette detecting and suppressing mechanism 8 has been described in the embodiment as a cassette type tape recorder, but can be widely applied to other cassette type recording / reproducing apparatuses.

As described above, the recording / reproducing apparatus according to the present invention has a cassette detecting switch function for detecting the presence / absence of a cassette in the cassette inserting portion, and a spring biasing the inserted cassette toward the head of the recording / reproducing apparatus. 2 sheets with a cassette holding spring function for positioning and positioning and having a connection terminal at the base
Cassette detection and suppression mechanism consisting of leaf-shaped contact pieces
The connection terminal at the base of the set detection and suppression mechanism
And the main unit, which is provided integrally with the main unit and
The cassette detection and holding mechanism is engaged and fixed to the circuit board.
And a pair of hooks
The extension and holding mechanism is fixed to the circuit board, and the connection terminals are
It can be electrically connected to the terminal holes of the board.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a mechanical deck of a cassette type tape recorder in this example.

FIG. 2 is a detailed partial cross-sectional view of a cassette detecting and suppressing mechanism in the present embodiment.

FIG. 3 is a partial cross-sectional view of an operation state of a cassette detecting and suppressing mechanism in the present example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mechanical chassis 2 tape take-up reel base 3 tape supply reel base 4 head 5 cassette positioning guide 7 circuit board 8 cassette detection / suppression mechanism 9 main body 10, 11 contact piece 10a, 11a contact 13 cover body 16 switch operating section 17 operation Contact 19 Hook C tape cassette

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15/02

Claims (1)

(57) [Claims] 1. A cassette detection switch function for detecting the presence or absence of a cassette in a cassette insertion portion, and a cassette holding spring function for spring-biasing and positioning the inserted cassette toward the head of the recording / reproducing apparatus. , The connection terminal on the base
Detecting and suppressing cassette consisting of two leaf-shaped contact pieces
Mechanism and the connection terminal at the base of the cassette detection and holding mechanism
A main body portion fixed through the main body portion and the main body portion;
To engage and fix the set detection and holding mechanism to the circuit board
It is composed of a pair of hook portions, the cassette detection and
When the holding mechanism is fixed to the circuit board, the connection
Make sure that the terminals are electrically connected to the terminal holes on the circuit board.
Recording reproducing apparatus according to claim was that the.