JPH07334824A - Head block device of tape recorder - Google Patents

Abstract

PURPOSE:To prevent the electric charge of a fixed guide, to reduce the number of parts and to make the setting area small by inserting the inserting and fixing part of a head between the head holding hook of a head base and an inserting attached base, by fixing a screw fixing part with a screw and by grounding the tape guide of the head. CONSTITUTION:The screw fixing part 1a of the opposite side to the tape guide 2 of an erasing head 1 is fixed to the attached base for a screw 5a of one side of a head base 5 with a screw 6 and an inserting and fixing part 1b of the side of the guide 2 is held by a head holding hook 5d using the elesticity of the head base 5. That is, a rib 5c projecting a little higher than an attached base 5b is provided between the attach base 5b of the other side of the head base 5 and the hook 5d and the height of the rib 5c equals almost to that of the attached base 5a. The fixing part 1b is pushed up in a direction in which the fixing part 1b is press-fixed to the hook 5d by inserting the fixing part 1b of the head 1 under the hook 5d and by fixing the fixing part 1a to the attached base 5a with the screw 6. At this time, the guide 2 of the head 1 is grounded through the head base 5 because the guide 2 fixed to the head 1 is press-attached to the hook 5d on the under side of the hook 5d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder head block device.

[0002]

2. Description of the Related Art In recent years, cost reduction, size reduction and weight reduction of audio equipment have been advanced. The same is required for the cassette tape recorder mechanism, and in addition to that, it is essential to secure performance and reliability. A conventional head block device will be described below with reference to the drawings.

FIG. 4 is a front view showing a conventional head block device, and FIG. 5 is a top view thereof. In FIG. 4, the erasing head 11 holds a tape guide 12 for stabilizing the tape running at the time of recording / reproducing at one end thereof, and a head base 14 slidably attached to a mechanism base 13 so as to insert a head base 15 into a screw. It is fixed in two places by 6. The head base 15 has two mounting seats 15a and 15b for the erasing head 11, one mounting seat 17a for the tape guide 17 for stabilizing the tape running during recording and reproduction, and one detent 17b for fixing the tape guide 17. I have some places. The tape guide 17 is the head substrate 14
The head base 15 is sandwiched between the two by a screw 18 so that the mounting height can be adjusted. Depending on the type of tape recorder mechanism, the tape guide 17 may not be attached.

[0004]

However, in the head block device as described above, since the tape guide 12 is not grounded, the tape which slides while rubbing is liable to be charged and dust or the like is likely to adhere to the tape, so that the tape is grounded. The number of components and mounting points such as the provision of a ground wire are increased, the number of assembly steps is increased, adjustment is required after mounting, and the space for mounting the head is increased. However, there are problems such as an increase in cost, an increase in cost, and a decrease in reliability.

The present invention has been made in order to solve the above-mentioned conventional problems, and has been made for the purpose of realizing a head block device having a small size, a light weight, a low cost and a high performance.

[0006]

In order to achieve the above object, the head block device of the present invention has a first configuration,
A head having a screw fixing portion and an insertion fixing portion, a tape guide fixed to the head for stabilizing the tape running and made of a conductive material, and a conductive portion extending above the insertion fixing portion of the head. A head substrate slidably attached to the mechanism substrate and electrically connected to the mechanism substrate, and a head mounting seat formed of a conductive material and fixed to the head substrate, a mounting seat for insertion of the head, and elasticity of resin. A head holding hook that receives the insertion fixing portion of the head between the insertion mounting seat and the insertion mounting seat, and the insertion mounting seat is a fulcrum when the head is mounted. A head base having a protruding rib is provided, and the thickness of the insertion fixing portion of the head and the conductive portion that conducts to the tape guide is overlapped with each other. Tsu is smaller than between the lower surface of the click, and a configuration is greater than between the lower surface of the rib and the head holding hook.

As a second structure, a head substrate slidably attached to the mechanism substrate and electrically connected to the mechanism substrate, and a head substrate made of a conductive material and fixed to the head substrate, stabilizes tape running. And a head base integrally formed with a tape guide.

[0008]

According to the first aspect of the present invention, according to the first aspect of the present invention, the erasing head is inserted and fixed on the insertion mount under the head holding hook of the head base formed of a conductive material. , And the conductive part that conducts to the conductive tape guide fixed to the erasing head is overlaid and inserted, and the screw fixing part is fixed with a screw, the head protruding from the mounting seat for insertion is used as a fulcrum. The insertion and fixing part of is pushed up, the conductive part and the insertion and fixing part are pressed and fixed to the lower surface of the head holding hook, and at the same time, the conductive part is grounded by the contact of the conductive material with the lower surface of the head holding hook. Will be done.

Further, in the second structure, the fixed tape guide integrally formed with the head base made of a conductive material acts so as to be grounded to the mechanism substrate through the head base and the head substrate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 is a front view of a head block device according to an embodiment of the present invention, FIG. 2 is a top view thereof, and FIG.
FIG. 2 is an enlarged front view of the main part of FIG. 1. In FIGS. 1 and 2, the erasing head 1 has a tape guide 2 made of a conductive material, which is fixed to one end of the erasing head, for stabilizing the running of the tape indicated by a dashed line in the figure during recording and reproduction of the cassette mechanism. is doing. The head base 5 to which the erasing head 1 is attached is formed of a conductive material, for example, a conductive synthetic resin, and is fixed to the head substrate 4, and the head substrate 4 is slidably attached to the mechanism substrate 3. The base 5 slides on the mechanism substrate 3 integrally with the head substrate 4. Head substrate 4 and mechanism substrate 3
And are electrically connected.

The recording / reproducing head 7 holding the tape guide 7a fixedly is fixed to a head substrate 4 slidably attached to the mechanism substrate 3 via a head base 5. The capstan 8 is rotatably held by a capstan bearing 8a fixed to the mechanism substrate 3 and serves as power for running the tape. The pinch roller arm 9 is rotatably held on the mechanism substrate 3 by a pinch roller arm shaft 9a, and the pinch roller 10 is connected to the pinch roller shaft 9b.
It holds freely in rotation. In FIG. 2, the pinch roller arm 9 rotates in the direction of arrow B as the head substrate 4 slides in the direction of arrow A during recording / reproducing of the cassette mechanism to press the pinch roller 10 to the capstan 8.
The pressure between the pinch roller 10 and the capstan 8 drives the tape sandwiched between the pinch roller 10 and the rotating capstan 8.

Here, as a first embodiment, the tape guide 2
Details will be described with reference to FIG. The erasing head 1 has a screw fixing portion 1a on the side opposite to the tape guide 2 fixed to one screw mounting seat 5a of the head base 5 by a screw 6, and the insertion fixing portion 1b on the tape guide 2 side.
Are held by a head holding hook 5d that uses the elasticity of the head base 5 formed of a conductive material such as a conductive synthetic resin. That is, there is a rib 5c slightly protruding from the mounting seat 5b between the other insertion mounting seat 5b of the head base 5 and the head holding hook 5d, and the height of the rib 5c and the height of the screw mounting seat 5a are increased. Are almost equal. Insert the insertion fixing portion 1b of the head 1 on the tape guide 2 side under the head holding hook 5d of the head base,
By fixing the screw fixing portion 1a to the one mounting seat 5a of the head base 5 with the screw 6, the insertion fixing portion 1b on the tape guide 2 side is pushed up in the direction of being crimped to the head holding hook 5b with the rib 5c as a fulcrum. . At this time, since the ground lug 2a bent from the tape guide 2 fixed to the erasing head 1 is inserted under the head holding hook 5d of the head base 5, the ground lug 2
a is pressure-bonded to the lower surface of the head holding hook 5d of the head base 5 and is grounded through the head base 5 formed of a conductive material. The thickness of the insertion fixing portion 1b and the ground lug portion 2a overlapped is smaller than the thickness between the insertion mounting seat 5b and the lower surface of the head holding hook 5d, but the thickness of the rib 5c and the lower surface of the head holding hook 5d is smaller. Since it is longer than the interval, due to the elasticity of the head holding hook 5, the lower surface of the head holding hook 5d of the head base 5 is always pressed against the ground lug portion 2a of the tape guide 2 of the erasing head 1.

As described above, according to this embodiment, the insertion fixing portion 1b of the erasing head 1 is held by the head holding hook 5d, and the ground lug portion 2a of the tape guide 2 is held.
And the lower surface of the head holding hook 5d of the head base 5 made of a conductive material are pressed to be grounded, and static electricity charged on the tape is removed from the tape guide. It is possible to prevent it from being adsorbed, improve reliability, and reduce the number of parts by eliminating the conventional ground wire and screws for fixing,
Therefore, the number of assembling steps can be reduced.

Although the case of the erasing head has been described here, the structure may be applied to the recording / reproducing head, the recording head or the reproducing head. Further, instead of the ground lug portion 2a integrated with the tape guide 2, a conductive paint or the like that is electrically connected to the tape guide 2 may be provided by a method such as printing or vapor deposition.

Next, as a second embodiment, FIG. 1 and FIG.
Will be explained. In the figure, a tape guide 5e is integrally formed with the head base 5 made of a conductive material between the recording / reproducing head 7 and the pinch roller 10. The tape guide 5e holds a tape (not shown) at least in the width direction, and in the case of a normal tape cassette, it is provided between the hole for inserting the recording / reproducing head 7 and the hole for inserting the pinch roller 10 at the time of recording / reproducing. It is inserted into a small hole (neither is shown) to stabilize the tape running and prevent the tape from derailing when the tape runs abnormally. If necessary, the tape guide 21 may be integrally formed by insert molding a conductive material such as metal in order to withstand friction during tape running. Further, the number is not limited to one in the figure, and a plurality may be provided.

As described above, according to the second embodiment, the static electricity charged on the tape is removed from the tape guide formed integrally with the head base made of a conductive material.
The reliability is improved and the number of parts can be reduced and the number of assembling steps can be reduced by eliminating the tape guide of another part of the conventional example and the screw for fixing.

[0017]

As described above, according to the first structure of the head block device for a tape recorder of the present invention, the head insertion / fixing portion has the head holding hook of the head base and the mounting seat for insertion. Since it is configured by inserting it in between and fixing the screw fixing part with a screw, there are few parts for fixing the head and mounting points, and wiring for grounding and connection space are not required and it can be downsized and easy to install. At the time of mounting, the tape guide of the head can be grounded to remove the static electricity charged on the tape guide.

According to the second aspect of the present invention, since the tape guide is integrated with the conductive head base and the tape guide is grounded at the same time, there is no need to mount or adjust the tape guide. No space is needed. In addition to stabilizing tape running, that is, preventing derailment and winding of the tape, static electricity that charges the tape guide can be removed.

As described above, according to the present invention, it is possible to reduce the product cost by reducing the number of parts, the number of man-hours for mounting and no adjustment, and to stabilize the quality and improve the performance of the product.

[Brief description of drawings]

FIG. 1 is a front view of a head block device according to an embodiment of the present invention.

FIG. 2 is a top view of the same.

FIG. 3 is a front view of the main part of the head block device.

FIG. 4 is a front view of a conventional head block device.

FIG. 5 is a top view of the same.

[Explanation of symbols]

 1 erasing head 2 tape guide 2a ground lug part 3 mechanism substrate 4 head substrate 5 head base 5a, 5b mounting seat 5c rib 5d head holding hook 5e tape guide 6 screw 7 recording / playback head 8 capstan 9 pinch arm 10 pinch roller

Claims (2)

[Claims] 1. A head having a screw fixing portion and an insertion fixing portion, and a conductive portion which is fixed to the head and is made of a conductive material and is extended to an upper portion of the insertion fixing portion of the head for stabilizing tape running. A tape guide, a head substrate slidably attached to the mechanism substrate and electrically conducting to the mechanism substrate, and a head formed of a conductive material and fixed to the head substrate, a head screw seat and insertion mount A head holding hook that receives the insertion fixing portion of the head between the seat and the insertion mounting seat by utilizing elasticity of the resin, and the insertion mounting seat serves as a fulcrum when the head is mounted. A head base having a rib protruding from the mounting seat, and the thickness of the insertion fixing portion of the head and the conductive portion conducting to the tape guide overlapped with each other. Serial and smaller than between the lower surface of the head holding hook, the head block device of a tape recorder, which is a larger than between the lower surface of the rib and the head holding hook. 2. A head substrate, which is slidably mounted on the mechanism substrate and electrically connected to the mechanism substrate, and a tape guide, which is made of a conductive material and is fixed to the head substrate, for stabilizing the tape running. A head block device for a tape recorder, comprising a formed head base.