JPH087527A - Fixing structure for substrate to recording and reproducing cassette - Google Patents

Abstract

PURPOSE:To ease dimensional accuracy required for a dummy substrate and shells of the subject cassette and facilitate their manufacture by providing an engaging means between the dummy substrate and the upper shell. CONSTITUTION:In incorporating a dummy substrate 16A into the cassette 1, the substrate 16A is loaded on the substrate fixing section 7 which forms a corner of the lower shell 2B and installed between a reinforcing rib and a side wall, and is covered with the upper shell 2A. In this case, the protruded sections, 22a, 22b, 22c and 22d of the elastic pieces, 23A, 23B, 23C and 23D installed on the upper part of the dummy memory loading section 19A of the substrate 16A are made to come into butting contact with the inner wall face of the upper shell 2A to fix the substrate 16A by bending the pieces 23A-23D. Hence, even though a clearance h4 exists between the upper shell 2A and the substrate 16A, the substrate 16A can be sufficiently fixed. This method loosens dimensional requirement in designing dummy substrates and shells, allows to drastically expand freedom in selecting the material etc., of the substrate, and ease the dimensional precision of parts, facilitating manufacture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a substrate to be mounted on a member requiring dimensional accuracy, and more specifically to a substrate having information recorded in a cassette, particularly a dummy mounted in place of an IC memory substrate. The present invention relates to a structure for fixing an ID board.

[0002]

2. Description of the Related Art A cassette for a recording medium in the prior art is miniaturized, and in addition to recording / reproducing on a recording medium tape, for example, a magnetic tape, recording information, the length of the magnetic tape, erasure prevention means, etc. It has various functions.

For example, an IC memory board having contact terminals facing a predetermined position of upper and lower shells corresponding to the upper and lower shells constituting the recording / reproducing cassette, or an ID board which is a dummy board without an IC memory is mounted. , An appropriate position corresponding to a contact terminal of this IC memory board or a terminal of an ID board and an electronic device, for example, a connector of a digital VTR or the like, to search for recorded information recorded in a cassette for a recording medium, and a cassette It is a well-known technique to identify the specifications of the.

Such a recording / reproducing cassette 1 is shown in FIG.
As shown in FIG. 2, a pair of tapes each having an upper shell corresponding to a rectangular upper shell and a lower shell 2B corresponding to a lower shell, in which a magnetic tape 3 as a recording medium tape is wound. It has a structure in which reels 4A and 4B are mounted.

On the front side of the recording / reproducing cassette 1, the recording / reproducing cassette 1 is an electronic device such as a digital VT.
It has an opening / closing part 5 that opens and closes to guide the tape 3 to the recording / playback mechanism of the device when it is mounted on the R or the like, and is shown on the side surface of the back side and on the upper shell side of the corner where the reinforcing rib is formed. Although it is not, it has a structure with an accidental erasure prevention plug.

At a position substantially the same as the position where the erroneous erasure prevention plug is arranged, a board mounting portion 7 composed of an elongated region is provided at a corner portion where the reinforcing rib 6 of the lower shell 2B is formed. .

The board mounting portion 7 is composed of two rooms, a terminal housing room 8 for connecting to a connector of an electronic device or the like in a room on the right side and an IC part of an IC memory board in the room on the left side as viewed from above in FIG. It is composed of a storage room 9 for storing.

The terminal accommodating chamber 8 has a structure in which a connection window portion 10 composed of four windows facing the outside is provided.

On the other hand, I which is incorporated in the board mounting portion 7
As shown in FIG. 6, the C memory substrate 11 has a substrate 12 formed in an elongated shape, a memory mounting portion 13 is provided on one side in the longitudinal direction thereof, and a terminal is provided on the other side in the longitudinal direction continuously from the memory mounting portion 13. This is a structure in which the portion 15 is provided.

The memory mounting portion 13 is formed in a quadrangle shape which is taller than the terminal portion, and an IC memory 14 for recording the recording information of the recording / reproducing tape is mounted at a substantially central position thereof. The memory 14 is surrounded by a protective layer. The IC memory 14 is connected to the terminal portion 15.

In the terminal portion 15, four terminals are formed in an aligned state, and each terminal is, from the outside, a grounding terminal 4A, a clock terminal 4B, a data terminal 4C, and a power supply terminal 4D.
It consists of and.

An IC memory substrate 1 having such a structure
8, the terminals 15A, 1 of the terminal portion 15 are attached to the board mounting portion 7 of the lower shell 2B of the recording medium cassette 1 as shown in FIG.
5B, 15C, and 15D are directed to the outside, and the memory mounting part 13 is inserted into the storage chamber 9 from above. Then, the terminal portion 15 side of the IC memory board 11 is exposed to the outside through the connection window portion 10, and the memory mounting portion 13 side is arranged in a state of being stored in the storage chamber 9, and the upper shell is arranged from the upper portion thereof. Then, the assembly is completed by engaging with the IC memory substrate 11 from above and engaging it. At this time, the clearance between the height of the upper shell and the lower shell 2B and the height of the IC memory board 11 is minimized so that the upper shell and the lower shell 2B may be minimized.
And the dimension accuracy in the height direction of the IC memory board 11 are increased so that the board mounting portion 7 can be engaged and locked without backlash.

On the other hand, as shown in FIG. 7, the ID board 16 has a board 17 having a shape substantially similar to that of the IC memory board 11.
It is sufficient to simply identify that there is no memory for recording tape information without communicating with an external device such as a digital VTR. Therefore, the substrate does not have to have electrical connection, and may be formed of plastic, for example. The ID board 16 having such a property is used for the terminal portion 1 of the IC memory board 11.
5 and the dummy terminal portion 18 and the dummy terminal portion 1
8 and a dummy memory mounting portion 19 continuously formed in a wide rectangular shape.

The ID substrate 16 having such a structure is
As in the case of the IC memory board 11 described above, as shown in FIG. 9, the recording / reproducing cassette 1 is inserted into the board mounting portion 7 provided in the lower shell 2B from above, and the upper shell is covered from above to assemble. Is complete.

At this time, as shown in FIG. 10, the upper shell 2
Height h1 from the inner wall surface of A to the joint surface of the lower shell 2B
And the height h2 from the inner wall surface of the lower shell 2B to the joint surface with the upper shell 2A and the height h3 of the dummy memory mounting portion 19 of the ID substrate 16 are at least (h1 + h
2)> h3. This is the upper and lower shell 2
This is because in both A and 2B, the dimensional accuracy is set severely in order to eliminate the looseness of the IC memory board 11.
This is due to the fact that it is not formed according to the dimensions of 6.
Therefore, the clearance h4 is naturally designed to occur. In order to make this clearance h4 as small as possible, the dimensional tolerance of the ID board 16 is set to the IC memory board 1
As in the case of 1, play can be eliminated by violently defining.

As shown in FIG. 11, the recording / reproducing cassette 1 in which the ID substrate 16 is assembled in this way is used to obtain recorded information from an external device such as a digital VT.
The connector 20 provided in the R or the like has a structure in which the connector 20 is brought into contact with the connection window portion 10 of the cassette 1 while sliding from the lower side to the upper side.

[0017]

However, in the structure for assembling the ID board in the above-mentioned conventional technique, the connector of the external device is connected from the lower side of the terminal in order to mount the device on the external device and obtain the recorded information. Since the contact state is obtained by contacting the upper shell, a clearance is generated at least for the thickness of the terminals of the IC memory board even if the board is held down by the upper shell. However, since the dimensions must be set in consideration of this and the design is such that there is always a clearance, there is a problem that backlash occurs in the board mounting portion and a connection state with the connector becomes defective.

In addition, when an ID board is produced in the same manner as the IC memory board, there is a problem that the board used as a dummy is expensive.

Therefore, there is a problem that the dimensional accuracy of the ID board to be mounted on the IC memory board should be made relatively gentle, and the price should be suppressed to solve the ID board fixing structure which can obtain a stable mounting state. are doing.

[0020]

In order to solve the above problems, a substrate fixing structure for a recording medium cassette according to the present invention is equipped with an IC memory substrate for identifying the cassette type and tape information. A cassette for
When the IC memory board is not mounted, the dummy board is arranged at a position where the IC memory board is mounted, and the dummy board is provided with locking means for elastically engaging with the upper shell. That is.

Further, the elastically engaging locking means is provided with at least one punching portion, the punching portion is opened in one side, and a pair of elastic pieces facing each other is provided in the opening. The elastically engaging locking means has elastic pieces of a constricted shape formed on both sides of the dummy substrate at a portion contacting the upper shell; and a protrusion is provided at an end of the elastic piece. That is, the substrate fixing structure of the recording / reproducing cassette is provided with a positioning means for positioning the substrate by inserting it into the opening on the upper shell side.

[0022]

The substrate fixing structure of the recording / reproducing cassette of the present invention having the above-described structure has the following actions.

(1) Since the dummy substrate is provided with the locking means that elastically engages with the upper shell, the design with a moderate dimensional accuracy becomes possible, and the degree of freedom in selecting the substrate material and the like. Will be able to greatly expand.

(2) The elastically engaging locking means is provided with at least one punching portion, and the punching portion has one side opened, and a pair of elastic pieces facing each other is arranged in the opening. As a result, the elastic pieces having the same strength can be appropriately increased or decreased, and the strength of the elastic pieces can be adjusted appropriately depending on the size of the slit.

(3) The elastically engaging locking means widens the pitch of the elastic pieces by forming the elastic pieces in a constricted shape on both sides of the dummy substrate at the portion contacting the upper shell. You will be able to structure.

(4) By providing the protrusions at the ends of the elastic pieces, the dimensional accuracy for producing the substrate can be set relatively gently.

(5) By providing the upper shell side with the positioning means for positioning the substrate by inserting it into the opening,
In addition to fixing the substrate, easy positioning can be performed.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The substrate fixing structure of the recording / reproducing cassette according to the present invention will be described below in detail. Since the entire structure of the recording / reproducing cassette is the same as that of FIG. 8 described in the section of the prior art, the same reference numerals are given and the description thereof will be omitted.

The structure for fixing the substrate mounted on the recording / reproducing cassette 1 according to the first embodiment of the present invention, in particular, the dummy substrate which is an ID substrate without an IC memory is shown in FIG.
As shown in, the structure is such that the upper shell 2A is covered while bending the elastic piece provided on the dummy memory mounting portion 19A of the dummy substrate 16A.

This dummy substrate 16A has two punching portions 21 whose diameter is increased on the back side above the dummy memory mounting portion 19A.
A and 21B are provided, and the elastic pieces 23A are provided with protrusions 22a, 22b, 22c, and 22d that are open at one side of the punched portions 21A and 21B and that face each other and project upward. , 23B, 23C, 23D. In the embodiment, two punched portions 21A and 21B are provided, and a pair of elastic pieces 23A and 23B facing the openings of the punched portions 21A and 21B, and 2 respectively.
The structure is provided with 3C and 23D, but is not limited to this.

In order to incorporate such a dummy substrate 16A into the cassette 1, first, the dummy substrate 16A is mounted on the substrate mounting portion 7 provided at the corner of the lower shell 2B and provided between the reinforcing rib and the side wall. And then the upper shell 2A from above
Elastic pieces 23A, 23B, 23 provided on the dummy memory mounting portion 19A of the dummy substrate 16A when covered.
The protrusions 22a, 22b, 22c and 22d of C and 23D are in contact with the inner wall surface of the upper shell 2A, and the elastic piece 23.
This is a structure in which the dummy substrate 16A is fixed by bending A, 23B, 23C, and 23D. Therefore, the structure is such that the dummy substrate 16A can be sufficiently fixed even if there is the clearance h4 generated between the upper shell 2A and the dummy substrate 16A.

Next, the substrate fixing structure of the recording / reproducing cassette 1 according to the second embodiment of the present invention is provided above the dummy memory mounting portion 19B of the dummy substrate 16B as shown in FIG. The structure is such that the upper shell 2A is covered while bending the elastic piece.

This dummy substrate 16B has one punching portion 24 whose diameter is increased on the back side above the dummy memory mounting portion 19B.
Is provided, and a protrusion 25a that is open at one side of the punched portion 24, faces each other at the entrance, and projects upward.
The structure includes elastic pieces 26A and 26B provided with 25b.

In order to assemble the cassette 1 by mounting the dummy board 16B, the dummy board 16B is first mounted on the board mounting portion 7 provided at the corner of the lower shell 2B between the reinforcing rib and the side wall. When the upper shell 2A is mounted and the upper shell 2A is covered therewith, the protrusions 25a and 25b of the elastic pieces 26A and 26B provided on the dummy memory mounting portion 19B of the dummy substrate 16B contact the inner wall surface of the upper shell 2A. This is a structure in which the dummy substrate 16B is fixed in a state in which the elastic pieces 26A and 26B are bent while being in contact with each other. Therefore, the structure is such that the dummy substrate 16B can be sufficiently fixed even if there is the clearance h4 generated between the upper shell 2A and the dummy substrate 16B.

Next, in the substrate fixing structure of the recording / reproducing cassette 1 according to the third embodiment, as shown in FIG. 3, the elastic pieces of the dummy substrate 16C having a wider pitch are bent to bend the upper and lower shells 2A, 2B. The structure is fixed between them.

The dummy substrate 16C has a constricted portion 27A formed by cutting out a substantially intermediate position of the dummy memory mounting portion 19C.
27B is provided, and both upper ends of the bridge girder-shaped upper part are formed with elastic pieces 28A and 28B having a wide pitch.
This is a structure in which protruding portions 29a and 29b are provided above the A and 28B.

A dummy substrate 16C having such a structure
First, the dummy substrate 16C is mounted on the substrate mounting portion 7 provided between the reinforcing rib and the side wall at the corner of the lower shell 2B, and when the upper shell 2A is covered from above, the dummy substrate is mounted. The elastic pieces 28 at the upper and lower ends of the bridge girder shape, which are confined at the intermediate position of the dummy memory mounting portion 19C of the substrate 16C
The protrusions 29a and 29b of A and 28B come into contact with the inner wall surface of the upper shell 2A, the elastic pieces 28A and 28B are bent, and the dummy substrate 16C is fixed to complete the assembly.

The structure for fixing the substrate mounted on the recording / reproducing cassette 1 of the fourth embodiment of the present invention, in particular, the dummy dummy substrate 16D having no IC memory mounted is as shown in FIG.
As shown in, when the elastic shells 23A, 23B, 23C and 23D provided on the dummy memory mounting portion 19A of the dummy substrate 16A similar to the structure described in the first embodiment are bent and the upper shell is covered. At the same time, punching parts 21A, 21
The ribs 30A and 30B provided on the upper shell 2A are inserted into B for positioning.

Since the structure of the dummy substrate 16A has been described in the first embodiment, the same reference numerals are given and the description thereof is omitted. Further, the upper shell 2A has a punching portion 21 just
Rib 30 which is a positioning means capable of engaging with A and 21B
It has a structure in which A and 30B are provided. In the embodiment, the ribs 30A and 3 are provided on the two punched portions 21A and 21B, respectively.
The structure is such that 0B is inserted, but a structure in which one is inserted is also possible, and the structure described in the second embodiment can be used.
It goes without saying that a structure may be adopted in which ribs are inserted into the individual punched portions 24.

In order to incorporate such a dummy substrate 16A into the cassette 1, first, the dummy substrate 16A is mounted on the substrate mounting portion 7 provided at the corner of the lower shell 2B and between the reinforcing rib and the side wall. And then the upper shell 2A from above
When the upper shell 2A is covered with the ribs, the ribs 30A and 30B are inserted into the punching portions 21A and 21B, and the dummy substrate 16A is inserted.
Positioning is performed, and at the same time, the protrusions 22a, 22 of the elastic pieces 23A, 23B, 23C, 23D of the dummy substrate 16A.
The structure is such that the dummy substrate 16A is fixed by bending the elastic pieces 23A, 23B, 23C, and 23D in a state where they are in contact with the inner wall surface of the upper shell 2A at b, 22c, and 22d. Therefore, even if there is a clearance h4 between the upper shell 2A and the dummy substrate 16A, the dummy substrate 16A can be sufficiently positioned and fixed.

[0041]

With the structure described above, the substrate fixing structure of the recording / reproducing cassette according to the present invention has the following effects.

(1) Since the dummy substrate is provided with the locking means that elastically engages with the upper shell, a design with a moderate dimensional accuracy becomes possible, and the degree of freedom in selection of the substrate material and the like. Can be greatly expanded, the dimensional accuracy of the shell and the dummy substrate can be reduced, and the dimensional accuracy of the parts can be moderated to facilitate the production, which is an extremely excellent effect. Further, the clearance between the dummy substrate and the shell can be eliminated, the connection state with the connector of the external device such as the digital VTR can be improved, the durability of the connector can be improved, and the reliability can be improved. It has an extremely excellent effect that can be achieved.

(2) The elastically engaging locking means is provided with at least one punching part, and this punching part has one side opening, and a pair of elastic pieces facing each other are arranged in the opening. This makes it possible to appropriately increase or decrease the elastic pieces having the same strength, and to adjust the strength of the elastic pieces depending on the size of the slit, which is extremely excellent in that the dummy substrate can be fixed in a stable state. Produce the effect.

(3) The elastically engaging locking means widens the pitch of the elastic pieces by forming the elastic pieces in a constricted shape on both sides of the dummy substrate at the portion contacting the upper shell. It is possible to form a structure, and there is an extremely excellent effect that the bending force of the elastic piece is dispersed and the elastic piece can be fixed in a stable state.

(4) By providing the protrusions at the ends of the elastic pieces, it is possible to set the dimensional accuracy for producing the substrate relatively moderately and to reduce the production cost of the dummy substrate. It has an excellent effect.

(5) By providing the upper shell side with positioning means for positioning the substrate by inserting it into the opening,
In addition to the fixing of the dummy substrate, easy positioning can be performed, which is an extremely excellent effect that the dummy substrate can be fixed in a stable state.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a fixing structure for attaching a dummy substrate according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a fixing structure for mounting a dummy substrate according to a second embodiment of the present invention.

FIG. 3 is an explanatory view showing a fixing structure for attaching a dummy substrate according to a third embodiment of the present invention.

FIG. 4 is an explanatory view showing a fixing structure for mounting a dummy substrate according to a fourth embodiment of the present invention.

FIG. 5 is a plan view in which an upper shell of a recording / reproducing cassette equipped with a substrate is removed.

FIG. 6 is a plan view showing a terminal side of an IC memory board.

FIG. 7 is a plan view of a dummy substrate.

FIG. 8 is an enlarged view of a schematic main part on which an IC memory board is mounted.

FIG. 9 is an enlarged view of a schematic main part in which a dummy substrate is mounted.

FIG. 10 is a schematic explanatory view in which a dummy substrate in a conventional technique is attached to a recording / reproducing cassette.

FIG. 11 is a schematic explanatory view of a connection state between a dummy substrate and an external connector.

[Explanation of symbols]

 1 Recording / reproducing cassette 2A Upper shell 2B Lower shell 3 Tape 4A, 4B Reel 5 Opening / closing part 6 Reinforcing rib 7 Board mounting part 8 Terminal storage room 9 Storage room 10 Connection window part 11 IC memory board 12 Board 13 Memory mounting part 14 Memory 15A Power supply terminal 15B Clock terminal 15C Data terminal 15D Power supply terminal 16 Dummy substrate 17 Board 18 Dummy terminal part 19 Dummy memory mounting part 20 Connector 21A, 21B Punching part opening 22a, 22b, 22c, 22d Projection part 23A , 23B, 23C, 23C, 23D Elastic piece 24 Stamped part 25a, 25b Projection part 26A, 26B Elastic piece 27A, 27B Constricted part 28A, 28B Elastic piece 29a, 29b Projection part 30A, 30B Rib

Claims (5)

[Claims] 1. A recording / reproducing cassette capable of being equipped with an IC memory board for identifying the type of cassette and tape information, wherein a dummy is provided at a position where the IC memory board is mounted when the IC memory board is not mounted. A substrate fixing structure for a recording / reproducing cassette, characterized in that a substrate for recording is disposed, and a locking means for elastically engaging with the upper shell is provided on the dummy substrate. 2. The elastically engaging locking means is provided with at least one punching portion, the punching portion is opened in one side, and a pair of elastic pieces facing each other is provided in the opening. The substrate fixing structure for a recording / reproducing cassette according to claim 1, wherein: 3. The elastically engaging locking means comprises elastic pieces having a constricted shape, which are formed on both sides of the dummy substrate at a portion that abuts on the upper shell. A substrate fixing structure for the recording / reproducing cassette described. 4. The substrate fixing structure for a recording / reproducing cassette according to claim 2, wherein a projection is provided at an end of the elastic piece. 5. The substrate fixing structure for a recording / reproducing cassette according to claim 2, wherein the upper shell side is provided with a positioning means that is inserted into the opening to position the substrate.