JPH04143984A - Tape cassette - Google Patents

Abstract

PURPOSE:To reduce the number of parts, to simplify the management of parts and, to facilitate assembling by providing a locking part provided having an elastic function at a lock member for front cover closing and arranging the lock member at a cassette case via the locking part. CONSTITUTION:The leaf spring 10d of the lock member is deformed by opening the front cover of a tape cassette via the locking part 13, and the locking of a lock claw 10f on the locking part 13 is released. The lock member is coupled with a pedestal part 10c provided with the claw-shaped locking part 10a having the elastic function by the spring 10d, and the lock member is arranged by inserting the connecting part 10a to the cassette case. By employing the integral constitution of the lock claw 10f with the locking part 10a, the number of components can be reduced, which simplifies the component management of parts, and also, the assembling of a front cover part is facilitated.

Description

[Detailed description of the invention] [Industrial application field]

The present invention operates in the thickness direction of the case body to lock the front cover of a tape cassette used in a recording and/or playback device, particularly an 8mm video tape cassette or an HDTV tape cassette. The present invention relates to a tape cassette equipped with a locking member.

[Background of the invention]

2. Description of the Related Art Conventionally, it is well known that tape cassettes have been used in recording and/or reproducing apparatuses (hereinafter simply referred to as recording and reproducing apparatuses) such as video tape recorders. In addition, to give an overview of such a tape cassette, in terms of -C, a supply reel and a take-up reel are disposed within a case body formed by combining an upper half and a lower half made of plastic, and A magnetic tape is stretched over a predetermined path between the supply reel and the take-up reel, and a front cover is provided to protect the magnetic tape located outside the case body. It is also well known that a locking means is provided to maintain the front lid in a closed state. For example, as proposed in Japanese Utility Model Publication No. 63-12455, a rotating lid that covers the front surface of a tape cassette to protect the tape stretched over the front surface of the tape cassette, two side walls separated from each other, and the side wall and an extension of one of the side walls and an inner surface of the side plate of the rotary lid, which is perpendicular to the longitudinal direction of the tape stretched over the front surface of the tape cassette, so as to be separated from each other. a groove formed in the tape cassette; a notch provided in the lower front surface of the rotating lid corresponding to the groove position to allow the lock release member to enter the groove from the front surface of the tape cassette; and a cutout in the side wall. The tape cassette is pivotably supported and rotates within the groove in the thickness direction of the tape cassette, and has an engaging end with the rotating lid and a release end facing the front surface of the tape cassette via the notch. hand,
Normally, the lock releasing member, which passes through the notch and the groove and enters from the front surface of the tape cassette, engages with the rotating lid at the engaging end to prevent its rotation, and the unlocking member enters from the front side of the tape cassette, and the releasing end a lid lock that rotates when brought into contact with the rotary lid, releases its engagement with the rotary lid, and allows the lid lock to rotate; and a biasing spring that biases the lid lock to engage with the rotary lid. A tape cassette has been proposed. By the way, in this tape cassette, the lid lock and the biasing spring that biases the lid lock to engage with the rotary lid are made up of separate members, so there are many parts, it takes time and effort to manage the parts, and it is also time consuming. It is also troublesome to assemble.

[Disclosure of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape cassette that has a small number of parts, is easy to manage, and is easy to assemble. The object of the present invention is to provide a case body, a rotary opening/closing front cover attached to the case body, and a locking member for closing the front cover, which includes a locking part having an elastic function. This is achieved by a tape cassette, characterized in that the locking member is fixed to the case body by elastically deforming the locking part of the locking member and disposing it on the case body. . Further, the case body includes a case body, a fixing step formed on the case body, a rotary opening/closing front cover attached to the case body, and a locking part having an elastic function. and a locking member for closing the front lid, and the locking member is fixed to the case main body by elastically deforming the locking part of the locking member and disposing it on the fixing step of the case main body. This is achieved by a tape cassette characterized by:

【Example】

1 to 3 show a first embodiment of the tape cassette according to the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a partially cutaway side view of the main part, and FIG. The figure is a perspective view showing a locking member and a part of the case main body in which the locking member is disposed. The case main body part 1 constituting the tape cassette A is composed of a rectangular upper half 1a and a lower half Ib made of synthetic resin such as polypropylene, polystyrene, ABS resin, etc., and these upper half la and lower half 1b are upper and lower. They are fitted into each other and fixed with set screws to form an integral housing. A pair of tape reels, namely a supply reel 2a and a take-up reel 2b, are rotatably housed in the case body 1, and a magnetic tape (hereinafter simply referred to as tape) 3 is attached to the supply reel 2a and take-up reel 2a. 2b. Both tape reels 2a and 2b are placed on the bottom plate of the lower half 1b, and their lower ends are positioned by being provided on the bottom plate or fitting into a single fitting hole. 4 is a presser spring for the pair of tape reels 2a and 2b. As shown in FIG. 1, a front opening 5 is provided on the front surface of the case main body 1 and extends over substantially the entire length of the tape cassette.
The bottom plate of the lower half 1b has a bottom opening that is continuous with the front opening 5 (the tape loading member of the recording/reproducing device enters the pocket formed by the front opening 5 and the bottom opening and loads the tape 3 into the tape cassette A). ) is provided. A front wall is integrally formed on the bottom plate of the lower half 1b along the edge of the bottom opening, and this front wall allows the interior of the case body 1 to be spaced between the bottom opening side and both tape reels 2a and 2b. It is divided by. A pair of tape guides 6a are provided at both left and right ends of the front wall.
, 6b are integrally formed on the bottom plate of the lower half 1b, and the tape 3 is guided by these two tab guides 6a, 6b, and the hook is passed along the front opening. The front frontage 5 is covered by a front lid 7 formed in a substantially U-shape. That is, this front lid 7 is attached to the case main body 1.
polypropylene, which has a front plate 7a that closes the front surface of the front plate 7a, connecting pieces 7b extending rearward from both left and right ends of the front plate 7a, and a rotation shaft 7C protruding from the inner surfaces of both connecting pieces 7b in opposing directions; It is a molded product made of synthetic resin such as polystyrene or ABS resin, and the left and right connecting pieces 7b fit into the front end recesses 8a and 8b of the left and right side walls of the case body 1, and the rotation shaft 7C is inserted into the recesses. The parts 8a and 8b are respectively fitted and pivotally supported in rotation holes provided in the parts 8a and 8b. The front M7 is rotatable around the rotary wheel 7c between a posture in which the front surface of the case main body l is closed and an upwardly opened posture. It is rotatably biased to the normally closed position by resilient means such as a torsion spring 9 (not shown). Note that any mechanism may be used for closing the front lid 7. At the location where the pocket exists, a dust cover is pivotally connected to the inside of the front lid 7 via a shaft, and this dust cover protects the inner side including the lower side of the tape 3 when the tape cassette A is not in use. and seal the top of the opening of the pocket,
Dust is prevented from entering from the upper and lower opening surfaces of the pocket and adhering to the tape 3. This dust cover has left and right sides facing the pocket (these sides are attached to the tape guides 6a and 6).
connected to the cam groove provided in
As the front lid 7 is opened, the dust cover also moves upward together with the front 17 without interfering with the tape 3 at all. That is, dust cover mounting pieces are integrally hung from the upper end side of the front plate 7a at locations near both left and right ends of the front plate 7a of the front lid 7, and dust cover mounting pieces are attached to both left and right ends of the upper and lower intermediate portions of the dust cover. The protruding shaft is pivotably supported. Bottle-shaped cam followers are protruded from the left and right sides near the lower end of the dust cover, and these cam followers are engaged and connected to the cam grooves, respectively. IO is a locking member, and this locking member 10 is constructed by insert molding means using a plate spring or a suitable resin material such as polyacetal, and its main components are as shown in FIGS. The part is a claw-shaped locking part 10 fixed to the case body part 1 (lower case 1b in this embodiment).
a pair of elastic resin locking arms 10b, a resin base 10c serving as the base of the locking arms 10b, and a resin base 10c that hangs downward from the tip of the base 10c. A leaf spring 10 made of a metal elastic material is provided.
d, and a locking portion 10g made of resin and having a release end 10e and a locking claw 10f provided at the lower end of the leaf spring 10d. Reference numeral 11 denotes a horizontal flat plate portion 12c connected to the case body portion 1 (in this embodiment, the vertical walls 12a and 12b of the lower case 1b).
), and when the locking arm 10b of the locking member 10 is fitted into this opening 11, the locking arm 10b is elastically deformed, and the locking arm 10b is configured to fit into the opening 11.
The claw-like locking portion 10a enters below the flat plate portion 12.
The locking member 10 is configured to be attached to the case body 1 in a so-called snap-type manner. As can be understood from the structure and attachment structure of the lock member 10, the lock member 10 does not rotate like the cock member of conventional tape cassettes. Reference numeral 13 denotes a locking portion formed at a predetermined position on the connecting piece 7b of the front lid 7, and when the lock claw 10f of the locking member 10 locks into the locking portion 13, the front lid 7 is locked. This is to ensure that it is carried out. The tape cassette A configured as described above has its front 17 closed when not in use, and covers and protects the outer front surface of the tape 3.
When loaded into the recording and reproducing device, the front lid 7 opens and a tape loading member (not shown) on the recording and reproducing device side is inserted into a pocket formed in the left and right center of the front edge of the case body 1. Go in and pull tape 3 out to the front of the tape cassette. That is, when the tape cassette (A) is loaded into the recording/reproducing apparatus, the lock releasing member (not shown) on the recording/reproducing apparatus side enters and locks against the elastic force of the plate spring 10d of the locking member 10. The release end 10e of the member 10 is
This causes the lock claw 10 to be displaced to the right in the figure.
f comes off from the locking part 13 of the front cover 7, and the front! 7 is placed in a state where the lid can be opened, and a lid opening member (not shown) on the side of the recording/reproducing device is placed.
As a result of the operation, the front 17 rotates clockwise in FIG. A member (not shown) enters the tape 3.
The tape cassette will be pulled out forward. In the tape cassette A having the above structure, installation is completed by simply fitting the locking arm 10b of the locking member 10 into the opening 11, so that the locking mechanism of the front cover 7 can be easily assembled. is significantly high. Further, since the locking member 10 is fixed by the claw-like locking portion 10a being locked to the flat plate portion 12c of the lower case ib, there is no accident of the locking member 10 being removed when assembling the tape cassette, and the tape cassette is The assembly workability is extremely high. Furthermore, although the locking member 10 is repeatedly deformed as the front II 7 is opened and closed, the portion that is subjected to this deformation is constituted by a highly durable leaf spring lOd.
The tape cassette is highly durable and resistant to damage, which increases the durability of the tape cassette. Further, the locking member 10 is easily obtained and its manufacturing cost is not high. In the above embodiment, the locking member 10 is locked to the flat plate portion 12c of the lower case 1b, but in this case, the pair of resin locking arms 10b are connected to the resin base portion. This is because the locking arm Job is configured to face downward from the base part 10c, and if the locking arm Job is configured to face upward from the base part 10c, the locking member 10 can be fixed to the upper case 1a. Furthermore, in the above explanation, the locking member IO is fixed by being pushed in the upper case la or the lower case 1b in the vertical direction, but the base portion IOc is fixed by the plate spring lO.
The locking arm 10 is configured to be in the same plane as the od.
If b is erected on the rear side of the base part 1 (lc), even if the locking member 10 is pushed horizontally into the opening formed in the vertical plate part of the tape cassette, the upper case la or It can be fixed to the lower case 1b. Also, the locking member 10 may be configured to be fixed to the upper case 1a or the lower case lb from the side of the tape cassette. This is a side opening of a main part (locking member) showing a second embodiment of the tape cassette according to the present invention.The only difference in this embodiment from that of the previous embodiment is the shape of the claw-like locking portion 10a. Since the other basic technical ideas are the same, detailed explanation will be omitted.

【effect】

The tape cassette according to the present invention includes a case body, a rotary opening/closing front cover attached to the case body, and a lock for closing the front cover including a locking part having an elastic function. The structure is such that the locking member is fixed to the case body by elastically deforming the locking part of the locking member and disposing it on the case body, so the number of parts of the locking member is It has features such as a small number of parts, easy parts management, and extremely easy installation and assembly of the locking member. Further, the tape cassette according to the present invention includes a case main body,
a fixing step formed on the case body; a rotary opening/closing front cover attached to the case body;
and a locking member for closing the front lid, which is provided with a locking part having an elastic function, and the locking part of the locking member is elastically deformed and disposed on the fixing step part of the case main body. Since the lock member is fixed to the case body, the number of parts for the lock member is small, and parts management is easy.
Moreover, it has features such as being extremely easy to incorporate the locking member and furthermore to assemble.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the tape cassette according to the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a partially cutaway side view of the main part, and FIG. The figure is a perspective view showing a locking member and a part of the case body in which the locking member is disposed, and FIG. FIG. A...Tape cassette, 1...Case body, 1a
...Upper half, 1b...Lower half, 2a...Supply side reel, 2b...Take-up side reel, 3...Magnetic tape, 7...Front lid, 7a...Front plate , 7b... Connection piece, 7c... Rotating shaft, 10... Lock member, 10a
...Claw-shaped locking part, 10b...Locking arm, 10c
...Base part, 10d...Plate spring, 10e...Release end, 10f...Lock claw, 10g=-lock part,
11... Opening, 12a, 12b... Standing wall, 12
c...Flat plate part, 13...Locking part.

Claims (2)

[Claims] (1) comprising a case body, a rotary opening/closing front cover attached to the case body, and a locking member for closing the front cover including a locking part having an elastic function; A tape cassette characterized in that the locking member is fixed to the case body by elastically deforming the locking portion of the locking member and disposing it on the case body. (2) A case main body, a fixing step formed on the case main body, a rotary opening/closing front cover attached to the case main body, and a locking part having an elastic function. and a locking member for closing the front lid, and the locking member is fixed to the case main body by elastically deforming the locking part of the locking member and disposing it on the fixing step of the case main body. A tape cassette that is characterized by: