JPH0732769U - Tape cassette - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to reduce the processing cost of the spring member and to reduce the cost of the entire tape cassette. [Structure] The tape cassette 10 includes an engaged portion 5 of a front lid 5.
a3 and a storage recess 4b formed in the vicinity of the side surface 4a of the cassette housing 4 to be displaced lockably / unlockably and to extend into the storage recess 4b. The locking mechanism 7 that can prevent the opening operation of the front lid 5 from the locking member 8 that is pressed and biased to the locked state.
Is configured. Both wall portions 4b1 and 4b2 of the storage recess 4b
In this case, there are provided restriction protrusions 4c1 and 4c2 for restricting the extension 6b of the spring member 6 from being displaced in a direction other than the urging direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved tape cassette.

[0002]

[Prior art]

 For example, in the 8 mm standard tape cassette shown in FIG. 3, a pair of tape reels 3, 3 around which a magnetic tape 2 is wound are housed in a cassette housing 4, and the magnetic tape 2 stretched on the front surface of the cassette housing 4 is used. It has a well-known structure in which the front lid 5 which can be opened and closed is covered.

As shown in FIG. 4, the front lid 5 supports the rotating shaft 5a1 provided inside the side surface portion 5a in the shaft hole 4a1 formed in the side surface portion 4a of the cassette housing 4 so that the above-mentioned opening and closing operation is performed. It becomes rotatable in the A1-A2 direction so as to perform an operation. In addition, the one end 6a of the spring member 6 which is hooked in the middle with the locking projection 4a2 provided on the side surface 4a of the cassette housing 4 is locked to the locking projection 5a2 provided inside the side surface 5a of the front lid 5. As a result, the front lid 5 is biased in the closing direction (A1 direction).

This tape cassette is equipped with a locking mechanism 7 that can prevent the opening operation of the front lid 5 when the cassette is not used. The lock mechanism 7 includes an engaged portion 5a3 provided inside the side surface portion 5a of the front lid 5, an engaging portion 8a capable of engaging with the engaged portion 5a3, and a pressing protrusion 8c. Of the lock member 8 rotatably supported in the B1-B2 direction about the shaft 8b in the storage recess 4b formed in the vicinity of the side surface portion 4a of the lock member 8 and the pressing projection 8c of the lock member 8 are locked from above. In the state shown in the figure, the engaging member 8a of the lock member 8 and the engaging portion 8a of the lock member 8 are urged as described above. The front cover 5 remains engaged with the engaged portion 5a3, and the lock mechanism 7 is in a locked state that prevents the front cover 5 from opening. On the other hand, when the lock member 8 is rotated in the B2 direction against the biasing force of the extending portion 6b of the spring member 6 from the illustrated state, the above-described engagement (the engaging portion 8a of the lock member 8 and the front lid 5 is The engagement with the engaged portion 5a) is released, and the lock mechanism 7 enters an unlocked state that allows the front lid 5 to be opened.

Now, as can be seen from FIG. 5, which is an enlarged view of the urging state of the spring member 6 to the lock member 8, the conventional tape cassette 1 is accommodated near the tip of the extending portion 6 b of the spring member 6. The storage recess 4b is provided with a mountain-shaped bent portion 6b1 having substantially the same width as the space between the both wall portions 4b1 and 4b2, and the bent portion 6b1 allows the extension portion 6b to extend in the storage recess 4b in the width direction of the cassette housing 4. Displacement in a direction (that is, a direction other than the urging direction) was restricted.

[0006]

[Problems to be solved by the device]

 However, like the conventional tape cassette 1, the bent portion 6b1 is formed in the extending portion 6b of the spring member 6 that enters the storage recess 4b of the cassette housing 4, and the extending portion 6b is provided in a direction other than the biasing direction. In the method of restricting the displacement in the direction, since the bending portion 6b1 is relatively difficult to process, the processing cost of the spring member 6 increases, and as a result, the cost of the entire tape cassette increases.

[0007]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems. A pair of tape reels around which a magnetic tape is wound is housed in a cassette housing, and the magnetic tape stretched over the front surface of the cassette housing can be opened and closed freely. The engaged portion provided on the inside of the side surface portion of the front lid, the engaging portion capable of engaging with the engaged portion of the front lid, and the pressed portion applied to a portion different from the engaging portion. A lock member that is supported in a storage recess formed in the vicinity of a side surface of the cassette housing and that is displaceable in a locking / unlocking manner; and an extending portion that is locked to a pressed portion of the lock member. And a spring member for urging the locking member so as to lock the engaging portion of the locking member to the engaged portion of the front lid, and a locking mechanism capable of preventing the opening operation of the front lid. In the tape cassette, the extension of the spring member is in the biasing direction or less. It is to provide a tape cassette which is characterized in that a regulating portion for regulating the displaced in the direction of the pressed portion of the side walls or the locking member of said housing recess.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial plan view showing the vicinity of a storage recess of a cassette housing in the tape cassette of the present invention, and FIG. 2 is a sectional view taken along the line X1-X2 of FIG. Since the tape cassette of this embodiment has the same basic structure as the tape cassette described above with reference to FIGS. 3 and 4, only the gist of the invention will be described in this embodiment.

The tape cassette 10 shown in FIG. 1 and FIG. 2 shows a key portion of the tape cassette 10 described above with reference to FIGS. 3 and 4, in which the extending portion 6 b of the spring member 6 is pushed from above by the lock member 8. It has a structure in which it is hooked on the pressure projection 8c, and on both wall portions 4b1 and 4b2 of the storage recess 4b that substantially correspond to the tip end position of the extension portion 6b of the spring member 6, the restriction projections (controls) which are opposed to each other. Parts) 4c1 and 4c2 are provided. By providing the restriction projections 4c1 and 4c2, the extension 6b of the spring member 6 is restricted from being displaced in the width direction of the cassette housing 4 (that is, in a direction other than the biasing direction). The projecting portion 6b can press the pressing protrusion 8c of the lock member 8 at a good substantially central position.

In such a tape cassette 10, the extending portion 6b for urging the lock member 8 has the extending portion 6b of the cassette housing 4 even if the extending portion 6b of the spring member 6 extending linearly is not processed at all. Since the displacement in the width direction (that is, the direction other than the urging direction) can be restricted, the processing cost of the spring member 6 can be kept low, and as a result, the cost of the tape cassette 10 as a whole can be reduced.

In the tape cassette 10 of the present embodiment, the above-described restricting convex portions 4c1 and 4c2 are provided on both wall portions 4b1 and 4b2 of the storage concave portion 4b, but the present invention is not limited to this. Although not provided, for example, a V-shaped regulation groove (regulation portion) that regulates displacement of the extended portion 6b of the spring member 6 in the width direction of the cassette housing 4 to the pressed portion (pressing protrusion 8c) of the lock member 8 Needless to say, it may be formed.

[0013]

[Effect of device]

 From the above description, in the tape cassette of the present invention, the displacement of the extension member in a direction other than the urging direction can be regulated without any processing at the tip of the extension member of the spring member. The processing cost can be kept low, and as a result, the cost of the entire tape cassette can be reduced.

[Brief description of drawings]

FIG. 1 is a partial plan view showing the vicinity of a storage recess of a cassette housing in a tape cassette of the present invention.

2 is a sectional view taken along line X1-X2 of FIG.

FIG. 3 is a diagram showing an 8 mm standard tape cassette.

FIG. 4 is an enlarged perspective view of the vicinity of a side surface portion of the cassette housing shown in FIG.

FIG. 5 is a partial plan view showing, in an enlarged manner, the vicinity of a storage recess of a cassette housing in a conventional tape cassette.

[Explanation of symbols]

 2 magnetic tape 3 tape reel 4 cassette housing 4a side surface portion 4b storage concave portion 4b1, 4b2 both wall portions 4c1, 4c2 regulating convex portion (regulating portion) 5 front lid 5a side surface portion 5a3 engaged portion 6 spring member 6b extension Part 7 Lock mechanism 8 Lock member 8a Engagement part 8c Pressing protrusion (pressed part) 10 Tape cassette

Claims (1)

[Scope of utility model registration request] 1. A pair of tape reels around which a magnetic tape is wound are housed in a cassette housing, and the magnetic tape stretched on the front surface of the cassette housing is covered with a front lid that can be opened and closed. An engaged portion provided inside the portion, an engaging portion capable of engaging with the engaged portion of the front lid, and a pressed portion in a portion different from the engaging portion, Supports and locks in the storage recess formed near the side surface
A lock member that is displaceable in an unlockable manner; and an extension portion that engages with a pressed portion of the lock member,
A tape cassette having a lock mechanism that can prevent the opening operation of the front lid from a spring member that biases the locking member to lock the engagement portion of the lock member to the engaged portion of the front lid. In the tape cassette, the extension portion of the spring member is provided with a regulation portion that regulates displacement of the spring member in a direction other than the urging direction, on both side walls of the storage recess or on the pressed portion of the lock member. .