JPH067470Y2 - Cassette tape player - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a cassette tape player, and particularly, a tape guide mechanism section for regulating the positional relationship between the magnetic tape and the magnetic head during recording and reproducing of the magnetic tape. Regarding the improvement of.

[Prior Art] In a cassette tape player, it is extremely important to accurately control the positional relationship between the magnetic tape and the magnetic head during recording and reproduction of the magnetic tape.

Conventionally, as a tape guide mechanism portion for regulating the positional relationship between the magnetic tape and the magnetic head, there is one using left and right small window tape guides 1 and 2 as shown in FIGS. 5 and 6. At the tips of these small window tape guides 1 and 2, concave guide grooves 1a and 2a for guiding the magnetic tape T in the vertical direction are formed. Then, these small window tape guides 1 and 2 are separately attached to fixed positions on the head base 5 by screws 3 and 4. Springs 6 and 7 for urging the small window tape guides 1 and 2 upward are provided at their mounting positions, and the small window tape guides 1 and 1 are provided according to the degree of screwing of the screws 3 and 4.
The height of 2 can be finely adjusted.

A magnetic head 8 is mounted on the head base 5 so as to be located between the left and right small window tape guides 1 and 2. This magnetic head 8 has a support portion 8a on the upper side, and the left and right portions of the support portion 8a are screws 9, 1
It is attached at a fixed position on the head base 5 by 0. A spring 11 for urging the left side portion of the support portion 8a upward is provided at a mounting position of the left side portion of the support portion 8a, and the inclination of the magnetic head 8 is finely adjusted according to the degree of screwing of the screw 9. You can do it.

The head base 3 to which the small window tape guides 1 and 2 and the magnetic head 8 are attached is slidably mounted on the main body of the cassette tape player. When recording and reproducing the magnetic tape T, the head base 3 slides upward in FIG. 5 so as to approach the cassette case C, and the left and right small window tape guides 1 and 2 are small windows of the cassette case C. Entering the inside from C1 and C2, the magnetic tape T is guided in the vertical direction (the front and back direction of the paper surface of the figure). At the same time, the magnetic head 8 enters the inside of the cassette case C and contacts the surface of the magnetic tape T guided between the left and right small window tape guides 1, 2. Therefore,
The magnetic head 8 is provided by the left and right small window tape guides 1 and 2.
The positional relationship between the magnetic tape T and the magnetic tape T is accurately regulated.

By the way, in such a conventional tape guide mechanism portion, the head base 3 and
Left and right small window tape guides 1 and 2, magnetic heads 8 and 4
One screw 3, 4, 9, 10 and three springs 6,
7,11 were needed.

[Problems to be Solved by the Invention] As described above, the tape guide mechanism part in the conventional cassette tape player has a large number of parts constituting the tape guide mechanism part, and as many as four screws 3, 4, 9, for assembling it.
Since 10 is required, the assemblability was poor.

The present invention solves such a problem.

[Means for Solving the Problems] In the cassette tape player of the present invention, the left and right small window tape guides for guiding the magnetic tape, and the magnetic heads located between these small window tape guides are attached to the head base. The head base slides during recording and reproducing of the magnetic tape, the left and right small window tape guides enter the cassette case through the left and right small windows provided in the cassette case, and guide the magnetic tape. In a cassette tape player in which a magnetic head contacts a portion of the magnetic tape guided between the left and right small window tape guides, a protrusion protruding upward is provided on the upper part of the head base, and the left and right small window tapes are provided. The guides are integrated to form a small window tape guide block, and the small window tape guide block is fitted to the protrusion. The magnetic head is provided with a support portion provided on the magnetic head on the upper end of the protrusion, and the lower end of a screw penetrating the support portion of the magnetic head from above to below is screwed onto the upper end of the protrusion. Is attached to the upper end of the protrusion, and a spring for urging the former downward and the latter upward is interposed between the small window tape guide block and the support portion of the magnetic head.

[Operation] The cassette tape player of the present invention comprises a small window tape guide block formed by integrating left and right small window tape guides, a magnetic head, and a spring interposed between the small window tape guide block and the magnetic head. The positional relationship between the magnetic tape and the magnetic head is regulated by utilizing the tape guide mechanism section which is simplified and improved in assembling by the small window tape guide block and the screw for attaching the magnetic head to the head base.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Reference numeral 21 denotes a head base, and left and right protrusions 21a and 21b protruding upward are provided on an upper portion thereof. 22
Is a small window tape guide block, and the small window tape guide block (hereinafter referred to as “guide block”) 22 is integrally formed with left and right small window tape guides 22a and 22b. At the tips of the small window tape guides 22a, 22b, concave guide grooves 22c, 22d for guiding the magnetic tape T in the vertical direction are formed. Further, through holes 22e and 22f are formed on the left and right sides of the guide block 22, and by fitting these through holes 22e and 22f and the protrusions 21a and 21b of the head base 21, the guide block 22 is placed on the head base 21. It is located in. Further, a spring receiving projection 22g protruding upward is integrally formed in the center of the guide block 22.

A magnetic head 23 has a support portion 23a on the upper side thereof, and screw holes 23b and 23c are formed in the left and right portions of the support portion 23a. The left and right portions of the support portion 23a are placed on the upper ends of the protrusions 21a and 21b of the head 23, and the protrusions 21a and 21b are screwed into the upper ends of the protrusions 21a and 21b through the screw holes 23b and 23c. It is attached to the upper end of 21b. Then, in this attached state, the magnetic head 2
3 is located between the left and right small window tape guides 22a and 22b.

A leaf spring 26 is attached between the upper ends of the protrusions 21 a and 21 b and the support portion 23 a of the magnetic head 23. That is, the left and right portions of the leaf spring 26 are provided with screw-through holes 26a and 26b.
The screws 24 and 25 penetrate the inside of 6a and 26b. The left and right ends of the leaf spring 26 and the central portion are curved downward,
Further, the portion between the center and the left end of the leaf spring 26 and the portion between the center and the right end are curved upward. The downward curved portion of the leaf spring 26 is in pressure contact with both ends of the guide block 22 and the spring receiving projections 22g, and the upward curved portion is in pressure contact with the support portion 23a of the magnetic head 23. After all, the leaf spring 26 urges the guide block 22 downward and the magnetic head 23 upward.

Further, the head base 21 to which the guide block 22 and the magnetic head 23 are attached is slidably mounted on the chassis 27 of the cassette tape player so that the magnetic tape T approaches the cassette case C at the time of recording and reproducing. The head base 21 slides upward in FIG.

In this way, the tape guide mechanism portion for regulating the positional relationship between the magnetic tape T and the magnetic head 23 is constituted, and its constituent parts are the head base 21, the guide block 22, the magnetic head 23, and the two screws. There are a total of 6 points of 24, 25, and one leaf spring 26. Therefore, the number of components is smaller than that of the conventional tape guide mechanism, and the assembly thereof is extremely simple.

That is, after setting the guide block 22 on the head base 21, the leaf spring 26 and the support portion 23a of the magnetic head 23 are placed on the upper ends of the protrusions 21a and 21b, and the screws 24 and 25 are attached to the protrusions 21a and 21b. Screw on top.
Therefore, the guide block 22 and the magnetic head 23 can be attached at the same time by screwing only two screws 24 and 25. Then, the leaf spring 26 presses the guide block 22 onto the head base 21 to fix the guide block 22 in place, and the leaf spring 26 biases the support portion 23a of the magnetic head 23 upward, The magnetic head 23 will be fixed at a fixed position. Further, the height and inclination of the magnetic head 23 can be finely adjusted by adjusting the screwing amounts of the screws 24 and 25.

Then, the tape guide mechanism section configured in this way is
The function is similar to that of the conventional example described above.

That is, at the time of recording and reproducing the magnetic tape T, the head base 21 slides upward in FIG. 1, and the small window tape guides 22a and 22b on the left and right are provided on the small window C of the cassette case C.
The magnetic tape T is guided in the up and down direction (front and back direction of the paper surface of the figure) after entering the inside from 1, C2. At the same time,
The magnetic head 23 enters the inside of the cassette case C and contacts the surface of the magnetic tape T which is guided between the left and right small window tape guides 22a and 22b. As a result, the positional relationship between the magnetic tape T and the magnetic head 23 is accurately regulated.

[Advantage of Invention] As described above, the cassette tape player of the present invention integrates the left and right small window tape guides to form a tape guide block, and a spring is interposed between the tape guide block and the magnetic head. The tape guide mechanism portion that regulates the positional relationship between the magnetic tape and the magnetic head is configured by attaching these to the head base with a common screw, and therefore the following effects are achieved.

A spring interposed between the tape guide block and the magnetic head has the function of pressing the tape guide block onto the head base to fix it in place, and the function of urging the magnetic head upward to fix it in place. Therefore, as compared with the case where each function is performed by separate springs, the simplification of the configuration and the improvement of the assemblability can be realized.

Furthermore, since the left and right small window tape guides are integrated to form a tape guide block, the left and right small window tape guides are fixed at the same time and their positional relationship is accurately fixed by attaching the tape guide block. The small window tape guides on the left and right can be easily attached as they are, and the configuration can be simplified and the assemblability can be improved as compared with the case where the left and right small window tape guides are attached separately.

Furthermore, since the tape guide block and the magnetic head are attached with a common screw, they can be attached at the same time, and simplification of the configuration and improvement of the assemblability are realized compared to the case where they are attached with separate screws. can do.

[Brief description of drawings]

1 to 4 are views for explaining an embodiment of the present invention. FIG. 1 is a plan view for explaining a positional relationship between a magnetic tape and a magnetic head peripheral portion, and FIG. FIG. 3 is a front view of the magnetic head peripheral portion, FIG. 3 is a plan view of the magnetic head peripheral portion, and FIG. 4 is a view on arrow IV of FIG. 5 and 6 are views for explaining a conventional example, FIG. 5 is a plan view for explaining the positional relationship between the magnetic tape and the magnetic head peripheral portion, and FIG. 6 is a magnetic head peripheral portion. FIG. 21 ... Head base, 21a, 21b ... Protrusion, 22 ... Guide block, 22a, 22b ... Small window tape guide, 22c, 22d ... Guide groove, 22e, 22f ... Through hole, 22g ... Spring receiver Protrusion, 23 ... Magnetic head, 23a ... Supporting part, 24, 25 ... Screw, 26 ... Leaf spring, C ... Cassette case, C1, C2 ... Small window, T ... Magnetic tape,

Claims (1)

[Scope of utility model registration request] 1. Right and left small window tape guides for guiding a magnetic tape, and a magnetic head located between these small window tape guides are attached to a head base, and the head base is used for recording and reproducing the magnetic tape. By sliding, the left and right small window tape guides enter the cassette case from the left and right small windows provided in the cassette case to guide the magnetic tape, and the magnetic head is arranged on the left and right small window tape guides. In a cassette tape player that comes into contact with a portion of a magnetic tape guided between them, a protrusion protruding upward is provided on the upper part of the head base, and the left and right small window tape guides are integrated to form a small window tape guide block. And attach the small window tape guide block to the protrusion by fitting it on the magnetic head. Mounting a supporting part, and screwing the lower end of the screw penetrating the supporting part of the magnetic head downward from above to the upper end of the protrusion to attach the magnetic head to the upper end of the protrusion, and the small window tape guide block. A cassette tape player, characterized in that a spring for urging the former downward and the latter upward is interposed between the magnetic head supporting portion and the magnetic head supporting portion.