JPH0419882A - Tape cassette - Google Patents

Abstract

PURPOSE:To decrease the number of parts and to facilitate the assembly of a tape cassette together with the simple control of parts by using a front foot part, a fixed part, a rear foot part, and a connection part for a lock member and unifying these parts in one body with use of the resin. CONSTITUTION:A lock member 10 is made of an elastic plastic material and provided with a fixing part (support part) 11 fixed to a case main body part 1 (lower case 1b), an arm part 12 continuous to the part 11, a front foot part 14 which is continuous to the part 12 and contains a lock pawl 13, a rear foot part 15 which is continuous to the part 12 and locked to the part 1, and an approximately arc-shaped connection part 16 which is connected to the part 14, the part 11 and then the part 15. Then the parts 11 continuous to the part 12 of the member 10 are dropped into the square recess parts 20a and 20b formed to the erected walls 21a and 21b of a lower half 1b. Then an upper half 1a is joined to the half 1b. Thus the lock mechanism of a front cover 7 is simply assembled.

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 lid of a tape cassette used in a recording and/or playback device, particularly an 8mm video tape cassette or an HDTV tape cassette. A tape spool equipped with a locking member. This is related to

[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. To give an overview of such tape cassettes, - For boat fishing, a supply reel and a take-up reel are disposed inside a case body formed by combining an upper half and a lower half made of plastic; 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 closed state of the front cover. a rotating lid that covers the front surface of the tape to protect it; two side walls that are separated from each other; the tape is stretched between the side walls, an extension of one of the side walls, and the front surface of the tape cassette; a groove formed by arranging inner surfaces of the side plates of the rotary lid in a direction perpendicular to the longitudinal direction of the tape; and a lock release member into the groove from the front surface of the tape cassette. In order to allow the tape cassette to enter the tape cassette, the rotary lid is pivotally supported by a cutout provided at the lower front surface of the rotary lid corresponding to the groove position and the side wall, and rotates in the thickness direction of the tape cassette within the groove. It has an engaging end with the rotating lid and a releasing end facing the front surface of the tape cassette via the notch, and usually engages with the rotating lid through the engaging end. The lock release member, which passes through the notch and the groove and enters from the front surface of the tape cassette, rotates by abutting and moving the release end, thereby interfering with the rotating lid. A tape cassette has been proposed that includes a lid lock that releases the lock and allows rotation, and a biasing spring that biases the lid lock to engage with the rotating lid. In this case, the lid opening/link and the biasing spring that biases the lid lock to engage with the rotating lid are made up of separate parts, which requires a large number of parts, requires time and effort to manage parts, and is also difficult to assemble. It's a hassle.

DISCLOSURE OF THE INVENTION A first 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. A second object of the present invention is to provide a tape cassette whose front lid locking means is not easily damaged and is highly durable. 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 front cover that is fixed to the case body and moves in the thickness direction of the case body. The locking member includes a fixing part fixed to the case body, an arm connected to the fixing part, and a locking part connected to the arm. The case has a front leg portion including a claw, a rear leg portion that is connected to the arm portion and is locked to the case body, and a connecting portion that connects the front leg portion, the fixing portion, and the rear leg portion. This is achieved by a tape cassette characterized by being integrally constructed of resin. [Embodiment] Figures 1 to 3 show one embodiment of the tape cassette according to the present invention, in which Figure 1 is an overall perspective view, Figure 2 is a schematic perspective view of the locking member of the front lid, and Figure 2 is a schematic perspective view of the locking member of the front lid. FIG. 3 is a perspective view showing a part of the case main body in which this locking member is arranged. The case main body part 1 constituting tape force set) A is composed of a rectangular upper half 1a and a lower half 1b made of synthetic resin such as polypropylene, ABS, PS, etc., and these upper half 1a and lower half 1b are They are fitted into each other from above and below and secured with set screws to form an integrated 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 fitted into hole fitting holes provided in the bottom plate to determine the position. 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 width 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 lb 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 6 are installed at both left and right ends of the front wall.
a, 6b are integrally formed on the bottom plate of the lower half 1b, and the tape 3 is attached to both tape guides 6a, 6b.
The hook is passed along the front opening. The front opening 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 rotating shafts 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 ABs or PS, 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. They are fitted and pivotally supported in rotation holes provided in 8a and 8b, respectively. The front lid 7 is rotatable around the 20 rotation axis 7C between a posture in which the front surface of the case body 1 is closed and a posture in which the front surface is opened upward.
It is rotated and biased to the normally closed position by an elastic means such as a torsion spring 9 (not shown) attached to the housing. 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 tape cassette from the inside including the lower side when the tape cassette 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 17 is opened, the dust cover also moves upward together with the front lid 7 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 these mounting pieces are attached to the left and right WIi@ of the upper and lower intermediate portions of the dust cover. A shaft protruding from the 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. 10 is a locking member, and this locking member 10 is constructed by a predetermined molding means using an elastic plastic material, and as shown in FIG. A fixing part (supporting part) 11 fixed to the case 1b), an arm part 12 connected to the fixing part 11, a front leg part 14 connected to the arm part 12 and having a lock claw 13, and the arm part 12 and has a rear leg portion 15 that is locked to the case body, and a substantially arc-shaped connecting portion 16 that is connected to the front leg portion 14, the fixing portion 11, and the rear leg portion 15. . The arm portion 12 and the front leg portion 14 and rear leg portion 15 connected to the arm portion 12 are formed, for example, in a substantially U-shape, and the substantially arc-shaped connecting portion 16 is connected to the arm portion 12. The front leg portion 14 is connected to the fixing portion 11 and the rear leg portion 15 so as to be substantially parallel to each other. Reference numeral 17 denotes a release end formed on the front leg portion 14 for unlocking the front lid 7 by the lock member 10, and this release end 17 was also integrally provided when the lock member 1o was molded. It is something. 18 is a locked part 19 of the case body part 1 (lower case lb)
The locking pawl 18 is formed on the rear leg portion 15 and is also formed when the locking member 1° is molded. 20a and 20b are rectangular recesses formed in the standing wall 21a21b of the lower half 1b;
By arranging the fixing part (supporting part) 11 of the lock member 1o in the lower case lb (case body part 1
). As can be understood from the mounting structure of this locking member, the locking member 10 does not rotate like locking members of conventional tape cassettes. In the tape cassette A configured as described above, the front lid 7 is closed when not in use, and covers and protects the front outside 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 out tape 3 to the front of the tape cassette. That is, when the tape cassette A is loaded into the recording and reproducing device, the lock release member (not shown) on the recording and reproducing device side enters and releases the lock against the elastic force of the front part 14 of the locking member 10. Since the member displaces the release end 17 of the lock member 10 in the counterclockwise direction in FIG. Since the front cover 7 is removed and the front cover 7 is placed in a state where it can be opened, the cover opening member (not disclosed) on the recording and reproducing device side is removed.
The front M7 rotates clockwise in FIG. 1 and opens when the front M7 is operated, and a tape loading device on the recording/playback device side is inserted into a pocket formed in the left and right center of the front edge of the case body 1. 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, the locking member 2017) fixing part 11 connected to the arm part 12 is dropped into the rectangular recesses 20a and 20b formed in the standing walls 21a and 21b of the lower half 1b, The assembly work of the locking mechanism of the front lid 7 is completed by simply combining the upper half 1a.
Its workability is extremely high. Although the cock member 10 is repeatedly deformed as the front M7 is opened and closed, the connecting portion 16 is connected to the front leg portion 14, the fixing portion 11, and the rear leg portion 15 in a substantially arc shape.
Because of this, even though it is made of plastic, it is highly durable and resistant to damage, thereby increasing the durability of the tape cassette. Further, the locking member 10 is easily obtained and its manufacturing cost is not high. Furthermore, the locking member 10 includes a fixed part 11 and a lower case 1.
The front part of the locking member 10 is regulated by the recesses 20a and 20b of b, and by the locking pawl 18 and the locked part 19 of the case body 1 (lower case lb). Even if the leg portion 14 is bent or deformed, it is firmly held and does not waver, and the reliability of the locking operation of the locking member 10 is high.

【effect】

The tape cassette according to the present invention includes a case body, a rotatable front cover attached to the case body, and a front cover that is fixed to the case body and moves in the thickness direction of the case body. and a locking member for long closing the front cover. A front leg portion including a locking claw, a rear leg portion connected to the arm portion and locked to the case body portion, and a connecting portion connected to the front leg portion, the fixing portion, and the rear leg portion. Since it is integrally constructed of resin, the assembly workability of the locking mechanism of the front lid is extremely high.Although the locking member is repeatedly deformed as the front lid is opened and closed, it is Even though the tape cassette is made of plastic, which is more susceptible to plastic deformation than other materials, it is highly durable and resistant to damage; The cock member is easily obtained, its manufacturing cost is low, and the locking operation of the cock member is highly reliable.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the tape cassette according to the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a schematic perspective view of the locking member of the front lid, and FIG. FIG. 3 is a perspective view showing a part of the case main body portion in which the locking member is disposed. A...Tape cassette, l...Case body, 1a
... Upper half, 1b... Lower half, 2a... Supply side reel, 2b... Take-up side reel, 3... Magnetic tape, 4... Presser blade, 5... Front opening , 6a, 6b
...Tape guide', 7...Front cover, 7a...Front plate, 7b...Connecting piece, 7c...Rotating shaft, 8a, 8b
... Recessed part, 10... Lock member, 11... Fixing part, 12... Arm part, 13... Lock claw, 14...
Front leg portion, 15... Rear leg portion, 16... Connection portion, 1
7... Release end, 18... Locking claw, 19... Locked portion, 20a, 20b... Recessed portion, 21a, 21b...
Standing wall.

Claims (1)

[Claims] A case body, a rotary opening/closing front lid attached to the case body, and a front lid closing lock that is fixed to the case body and operates in the thickness direction of the case body. The locking member includes a fixing part fixed to the case body, an arm part connected to the fixing part, and a front part connected to the arm part and having a locking claw. It has a leg part, a rear leg part that is connected to the arm part and is locked to the case main body part, and a connecting part that is connected to the front leg part, the fixing part, and the rear leg part, and is integrally constructed of resin. A tape cassette characterized by being a tape cassette.