JPS6332781A - Small-sized tape cassette - Google Patents

Abstract

PURPOSE:To facilitate the mount operation of a lock piece and to eliminate the need for any special release mechanism at the loading side by fitting a rear end of the lock piece to a support near a notched part of a cassette cover and parted from the cover. CONSTITUTION:A lock 16b at one end of a lock piece 16 to be deformed elastically is engaged with an engagement part 4a of a cover 4, a fixed part 16c of the other end is fitted to a support 18 near a notched part 3d of a cassette cover and parted from the cover 4 and a support pillar 20 is provided at the center. Thus, the mount operation of the lock piece 16 is executed very easily. Further, in releasing the lock, a holder inner wall of the loaded side is abutted on the operation part 16d projected slightly outward from the case to release the lock of the lock part 16b and the cover is opened, then any special release mechanism is required for the loading side and the device is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides a tape cassette that is smaller than a standard type, for example, which is too small to be directly attached to a standard type video tape recorder, and therefore a standard type recording/playback device. The present invention relates to a small-sized tape cassette that requires an adapter, for example, for use in a small-sized tape cassette, and particularly to a small-sized tape cassette whose lid is securely locked.

(Prior Art) It is well known that standard-sized tape cassettes are generally used in recording and reproducing devices such as video recorders (V'rR). It is also well known that in recent years, compact tape cassettes have been developed that can record and play while maintaining compatibility with equipment that uses this standard type tape cassette.
3 This kind of small tape cassette is small tape cassette 1~
When used with a recording/playback device that uses a standard type Arp cassette while being recorded and played back by a dedicated recording/playback device, it must be stored in a tape cassette adapter that has approximately the same shape as the standard type. Therefore, it can be used in the same way as a standard type tape cassette.

FIG. 11 is an external perspective view of a general small-sized tape cassette, with the lid opened.

The small tape cassette 1 has a cassette housing 3 which stores the magnetic tape 1-2 and is composed of an upper half 3A and a + half 3B in a pale state, and a front opening of this cassette/casing 3 that opens and closes. The lid body 4 is rotatably supported by a pivot shaft (bin) 10. In addition, a gear 7a formed on the outer circumferential surface of a take-up reel hub 7, which will be described later, is attached to the cassette housing 3 on the upper half 3A. Notch 3 for facing the side of
d is formed. This notch 3d is defined when the upper and lower halves 3A and 3B are assembled. Note that 12 is a j3: II person-preventing groove formed through the upper and lower halves 3Δ, 3B on the rear side of the notch 3d.

The magnetic field 1-12 is usually protected by closing the lid 4 while being guided by the left and right rollers 5.5 so as to cross the frontage. The sliding force is applied by the leaf spring 11 inserted into the U-shaped recess 9 formed in #i1) on one side, and the sliding force is applied to the action 118. The quality is set (14 years).

When this small tape cassette 1 is used in a recording/reproducing device exclusively for small Arp cassettes (not shown), by inserting this small tape cassette 1 to a predetermined position in the device,
By rotating the lid 4 to the approximately horizontal position (1) shown in the figure and then lowering the small j-g 2J set 1, the supply side reel hub 6 is fitted to the supply reel feather and the winding is completed. Teeth r formed on the outer peripheral surface of the reel hub 7
i7a meshes with the installed drive gear, and cassette l=f
f, (1 in the recesses 3a, 3b, 3c on the opening side of 4\3,
The center of gravity 43, the inclined loading ball, and the capstan of the two units are installed in the recording/reproducing apparatus in a state where they have entered their respective positions.

In addition, when this small tape cassette 1 is used by being attached to a standard type recording/reproducing device, it is possible to use a tape cassette of the same shape as the standard type tape cassette as shown in, for example, Japanese Utility Model Publication No. 60-37739, as described above. It is used while being stored in the adapter storage section.

(Problems to be Solved by the Invention) By the way, the small tape cassette 1 having the above structure does not have a locking mechanism for the lid 4, so if the lid 4 is opened beyond a predetermined angle, the leaf spring will close. The elastic force of the magnetic tape 2 easily opens the lid, and as a result, the signal recording surface of the magnetic tape 2 is exposed to the outside, and the tape is damaged due to dust adhering to the signal recording surface. A possible problem is that recording and reproduction cannot be performed.

In addition, in order to eliminate such problems, if the small tape cassette 1 is equipped with a lid locking mechanism similar to that used in standard tape cassettes, an operating section for unlocking the locking mechanism is provided. is located inside the side of the cassette cassette, so a special lock release mechanism is provided in the adapter for use with a dedicated recording/playback device that uses this small tape cassette, or with a standard recording/playback device. Not only is this not compatible with current equipment, but the mechanical parts of each equipment!
This results in problems such as an increase in the number of parts.

(Means for solving the problems) The present invention has been made in view of the above-mentioned conventional drawbacks,
A notch is formed in the side surface of the cassette housing consisting of an upper half and a lower half to allow the gear of the take-up reel hub to be exposed, and a lid body covering a predetermined length of the Arp pass formed on the front surface is rotatably supported. Smaller than standard tape cassettes,
A small tape cassette that is used while being housed in an adapter when attached to a standard type recording and reproducing device, one end of which is locked to the cassette housing, and the other end of which is locked to the lid. The lever includes a torsion spring supported by a pivot part so as to bias the lid body in the direction of closing the lid, and an operation part protruding from the side surface of the cassette case, and a locking part formed at one end is attached to the lid. a fixing portion formed on the rear end portion, the rear end portion being located near the notch portion of the cassette housing and spaced apart from the lid body; The present invention provides a small-sized Arp cassette characterized by comprising an elastically deformable locking piece that is fitably attached to a support portion formed protruding from the inner surface of the upper half.

(Embodiment) Fig. 1 is a partially enlarged external perspective view of the locking mechanism of the lid of the small-sized Arp cassette according to the present invention.
This figure shows the inside of the upper half 3A as seen from the take-up reel hub 7 side of the small T-build cassette shown in the figure. FIG. 2 is an external perspective view of a small tape cassette according to the present invention, FIG. 3 is a partially enlarged perspective view of FIG. FIGS. 5 and 6 are plan views showing the relationship between the lock piece and the branch office, and FIG. 7 is a partially exploded perspective view showing the base of the lock piece, which constitutes a part of the main part of the present invention. 8 is a partial external perspective view showing the assembled state of FIG. 7. 1. In the embodiment of the present invention, the same parts as in FIG. A detailed explanation will be omitted.

In the small-sized Arp cassette 13 of the present invention, the first
The small piece shown in Figure 1! This configuration is such that the O-shaped recess 9, sliding piece 8, and leaf spring 11, which serve as means for opening and opening the lid 4 of the tape cassette 1, are removed. That is, as shown in FIG. 4, the lid 4 is connected to a torsion spring 14, which has one end locked to the lid 4 and the other end locked to the cassette casing 3.
10, it is assembled so that a biasing force is always applied in the direction of closing the lid.

In FIG. 1, the inner surface 15 corresponding to the notch 3d formed to allow the float 7a of the take-up reel hub 7 to face the side surface of the upper half 3A has an elastic material for preventing rotation of the lid 4. A deformable locking piece 16 is arranged close to the upper plate 17 of this upper half 3A. This lock piece 16 is integrally formed of, for example, synthetic resin, and has a hook-shaped locking part 16b formed at the tip of the main body part 16a.
The notch portion 3d formed in the upper half 3A of the cassette housing 3 faces so as to lock the engaging portion 4a of the lid body 4.
A fixing part 16C is provided at a position near the lid body 4 and away from the lid body 4, and a fixing part 16C formed at the rear end part is formed on the upper half 3A with an opening on the inner surface side to prevent incorrect insertion. It is attached to the upper half 3A in a tightly fitted and fixed state with a cylindrical support portion 18 provided near the upper half 3A. Furthermore, the lock piece 16 is prevented from moving in the insertion direction by the end surface of the lower half 3B.

As shown in FIG.
The operating portion 16d provided on the main body portion 16a of the locking piece 16 is locked by the engaging portion 4a at a position close to the locking piece 16.
protrudes from the side surface of the cassette housing 3 through a through hole 19 in the upper half 3A that is bored at a position close to the lid 4 side.

In addition, the operating portion 16d of the lock piece 16 is formed with an inclined surface in the vertical and horizontal directions, so that it can appropriately accommodate loading operations of the small tape cassette 13 in the horizontal and vertical directions with respect to the device. 20 in FIG. 1 is a cylindrical support that integrally projects from the upper half 3A to support the main body 16a of the lock piece 16, and is indicated by the two-dot chain line in FIG. As a result, warpage of the lock piece 16 that occurs during injection molding, for example, can be prevented, and the lock piece 16 can be stably attached. As shown in FIG. 6, this support 20 may be provided so as to support the main body portion 16a of the lock piece 16 at two locations, and its shape may be triangular or square.

The relationship between the cylindrical fixing part 16c of the lock piece 16 and the cylindrical support part 18 of the upper half 3A into which it is inserted is shown in FIG.
As shown in FIG. 8, the support part 18 into which the fixing part is fitted is formed to protrude from the main body part 16a at a center angle θ1, and the support part 18 has a center angle θ with respect to the inner surface of the upper half 73A.
2 is in the relationship θ1>θ2. Therefore, the eighth
As shown in the figure, the shaft-shaped fixing part 16G is inserted into the cylindrical support part 18 of the upper half 3Δ from above, so that the locking piece 16 to which the fixing part is fixed is always attached to the upper half 3A due to the above-mentioned peak angle relationship. It is supported while being pressed against the inner surface of the lower half 3B, and its lower end is restricted from moving in the insertion direction by the end of the lower half 3B. In this way, both fixed parts 1
6c and the support portion 18 are attached in an angular relationship, so that the support column 20 not only corrects the warp of the lock piece 16 but also has the ability to prevent it from deforming over time.

In addition, 16e is an inclined surface formed at the lower end of the fixing part 16G of the lock piece 16, 18a is an inclined surface formed at the upper end on the frontage side of the support part 18, and the lock piece 16 is a double-ended inclined surface 16e.
, 18a facilitate the fitting operation.

FIGS. 9 and 10 show modified examples of the lock piece 16, and a rectangular fixing part 16G protruding from the rear end of the main body 16a is connected to the main body 16al, : The supporting part 18, which has a shape corresponding to the fixing part 16G so as to fit therewith, is formed at an angle 02 smaller than the angle θ1 with respect to the inner surface of the upper half 3A. .

Therefore, even in this case, the lock piece 16 is attached in a state where it is always pressed against the inner surface of the ten-half member 3A due to the angle of the peak.

Here, when the small tape cassette 13 according to the present invention is installed in a standard type recording/reproducing device, by loading it into the storage section of the above-mentioned adapter (not shown), the operating section 16d of the lock piece 16 is pressed against the inner wall of the adapter and is elastically displaced so as to rotate in the direction P in FIG.
The engagement state with is released. Therefore, this lid body 4 is forcibly opened against the force of the torsion spring 14 by the locking portion within the seven-dweller. In addition, to this small arbukasetsu 1 13
When mounting the adapter in the dedicated 8 position, the operating part 16d is pressed by the inner wall of the holder provided in the device (not shown) under the same conditions as the loading operation to the adapter, and the engaging part 4a of the lid body 4 and the locking part 16d are pressed. When the engagement state of the piece 16 with the locking portion 16b is released, the lid opening mechanism rotates the lid body 4 about the pivot shaft 10 against the force of the torsion spring 14. is opened.

(Effects of the Invention) As described above, the small-sized Arp cassette according to the present invention has an elastically deformable locking piece integrally formed of, for example, synthetic resin, and a locking part formed at one end of the locking piece, which can be engaged with four bodies. A rear end is provided near the notch of the cassette housing and at a distance from the lid, and the fixing part formed at the rear end is attached to the inner surface of the upper half. Because it is attached to the supporting part that protrudes from the
The installation is easy to operate, and the lid can be locked at all times with a small number of parts.Moreover, the lid is always closed by the elastic force of the torsion spring biased to this, so when the cassette is not in use, the lid can be locked. It is securely locked and cannot be opened easily, and as a result, the magnetic arp inside is not contaminated or damaged by contact with the operator's fingers, etc., which has practical advantages. .

[Brief explanation of the drawing]

Fig. 1 shows the locking mechanism of the lid of the small Arp cassette according to the present invention, a partially enlarged external perspective view showing the inside of the upper half of the small tape cassette as seen from the take-up reel hub side, and Fig. 2 shows the main body of the small tape cassette. A perspective view of the small tape cassette according to the invention,
Fig. 3 is a partially enlarged perspective view of Fig. 2 showing the base of the lock piece, Fig. 4 is a partially plan view showing the pivot portion of the lid, and Fig. 5 is a partially enlarged perspective view showing the base of the lock piece.
Fig. 6 is a plan view showing the relationship between the lock piece and the support column, Fig. 7 is a partially exploded perspective view showing the base of the lock piece, which constitutes a part of the main part of the present invention, and Fig. FIG. 7 is a partial external perspective view showing the assembled state; FIG. 9 is a partially exploded perspective view showing a modified example of the lock piece; FIG. 10 is a partial external perspective view showing the assembled state of FIG. 9; The figure is an external perspective view of a general small tape cassette seen from the bottom. 3...Cassette case, 3A...ten half, 3B...
・Lower half, 3d...notch, 4...lid, 7...
・Take-up reel hub, 13...small τ1 tape cassette,
14...Torsion spring, 16...Lock piece, 16a...
・Main body part, 16b...locking part, 16c...fixing part,
16d... Operating section, 18... Support section, 20... Support column. lE2 Figure 3 Figure 5 Figure 6 °/〆ε Figure 8

Claims (1)

[Claims] A notch is formed in the side surface of the cassette housing consisting of an upper half and a lower half to expose the gear of the take-up reel hub, and a lid body covering a tape bus of a predetermined length formed on the front side is rotatably supported. It is smaller than the standard type tape cassette,
A small tape cassette that is used while being housed in an adapter when attached to a standard type recording/reproducing device, one end of which is locked to the cassette housing and the other end of which is locked to the lid. A torsion spring supported by a pivot part so as to bias the lid in the direction of closing the lid, and an operating portion protruding from the side surface of the cassette casing, and a locking portion formed at one end of the lid. A rear end is provided in the vicinity of the notch of the cassette housing and at a distance from the lid, and a fixing part formed on the rear end is provided so as to face the engaging part so as to lock it. A small tape cassette characterized by comprising an elastically deformable locking piece that is fitably attached to a supporting part protruding from the inner surface of the upper half.