JPH0643888U - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] At the time of assembling a cassette, a lid and a brake member are attached to the upper half, and the brake member is urged by a spring so that the upper half is in a state before being joined to the lower half. In some cases, it is possible to provide a tape cassette in which the brake member surely slides toward the brake release position when the lid is rotated in the opening direction, so that there is no risk of cassette assembly failure. A pair of hubs around which a magnetic tape is wound is housed in a cassette body composed of an upper half and a lower half, and a brake member for preventing rotation of both hubs is slidably attached to the upper half. The brake member is provided with a pair of brake arms in parallel with the sliding direction, and the upper half is provided with a pair of plate-like projections standing upright toward the lower half. A tape cassette configured to slide along the outer side surface of the brake arm and the sliding contact surface of the plate-like protrusion, the recesses or protrusions that are slidable in the state of being fitted to each other and fitted together. It is characterized by having a section.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape cassette, and more specifically, when the upper half is in a state before being combined with the lower half when the cassette is assembled, rotating the lid in the opening direction surely brings the brake member to the brake release position. The present invention relates to a tape cassette that slides in the direction, so that there is no risk of cassette assembly failure.

[0002]

[Prior art]

 As shown in FIG. 4, a general tape cassette has a magnetic tape in a cassette body (a portion where hub rings 6 and 6 are provided) including an upper half 1 and a lower half (the lower half is not shown). It houses a pair of wound hubs (not shown). A brake member 2 for pressing the brake claws 23, 23 against the hub to prevent its rotation is slidably attached to the inner surface of the upper half 1. As shown in FIGS. 5 and 6, the brake member 2 has a pair of brake arms 21 and 21 provided on the left and right sides thereof along the outer surfaces of a pair of plate-shaped projections 3 and 3 which are erected on the upper half 1. The lower half side of the overhanging pieces 32, 32 provided on the outer side surface is slidable in the front-rear direction of the cassette, and the spring 5 (see FIG. 4) incorporated therein constantly applies the force toward the brake position. It is becoming popular.

Further, as shown in FIG. 4, a lid 4 for opening and closing the front end of the cassette body is rotatably attached to the front end of the upper half 1, and the lid 4 is rotated in the opening direction. At this time, the left and right side portions of the lid 4 engage with the brake arms 21 and 21, and the brake member 2 slides toward the brake release position (on the front end side of the cassette).

Conventionally, in the above-mentioned tape cassette, at the time of assembling, a lower half in which the hub and the like housed in the cassette body are arranged, and an upper half 1 in which the lid 4, the brake member 2 and the spring 5 are assembled. Is fitted. At this time, unless the brake member 2 is in the brake release state, the tip of the break pawl 23 hits the side surface of the hub, and the upper and lower halves cannot be fitted. Therefore, in the state where only the upper half 1 is present, the lid 4 is previously rotated in the opening direction, the above-mentioned brake member 2 is slid to the brake release position, and then the upper and lower halves are fitted together.

[0005]

[Problems to be solved by the device]

 However, the brake member 2 has a play in the vertical direction at the mounting portion to the upper half 1. After the upper and lower halves are combined and integrated, the pair of brake arms 21 and 21 provided on the left and right side portions of the brake member 2 are separated by the bulging pieces provided on the side walls of the upper and lower halves, respectively. Since the above play is limited because it is inserted into the sandwiched part, the above play in the vertical direction is too large when only the upper half 1 is present, and the above brake member 2 shifts too much vertically when the cassette is assembled. There are cases. If the brake member 2 shifts too much in the vertical direction, the engagement between the brake arms 21 and 21 and the lid 4 may not be successful, and there is a risk of defective assembly.

Therefore, an object of the present invention is to attach a lid and a brake member to the upper half and to urge the brake member by a spring so that the upper half is connected to the lower half when the cassette is assembled. In the previous state, when the lid is rotated in the opening direction, the brake member surely slides in the direction of the brake release position. Therefore, it is possible to provide a tape cassette in which there is no risk of cassette assembly failure. is there .

[0007]

[Means for Solving the Problems]

 According to the present invention, a pair of hubs around which magnetic tape is wound is housed in a cassette body composed of an upper half and a lower half, and a brake member for preventing rotation of both hubs is slidably mounted on the upper half. , A pair of brake arms are provided on the brake member in parallel with the sliding direction, and a pair of plate-shaped projections are erected on the upper half toward the lower half so that the brake arms respectively In a tape cassette configured to slide along the outer side surface of the plate-like protrusion, the sliding contact surfaces of the brake arm and the plate-like protrusion can be fitted to each other and can be slid in a fitted state. The above-mentioned object is achieved by providing a tape cassette characterized in that various concave portions or convex portions are provided.

[0008]

[Action]

 According to the tape cassette of the present invention, when the cassette is assembled, the lid and the brake member are attached to the upper half, and the brake member is biased by the spring so that the upper half is in a state before being coupled with the lower half. In some cases, the pair of brake arms of the brake member are slidably fixed to the plate-like protrusion (that is, the upper half) by the recess and the protrusion, and the vertical play is the same as that after the cassette is assembled. Therefore, when the lid is rotated in the opening direction, the lid smoothly engages with the brake arm and the brake member slides toward the brake release position.

[0009]

【Example】

 An embodiment of the tape cassette of the present invention will be described below with reference to the drawings. 1 is a plan view of the upper half side of an embodiment of the tape cassette of the present invention as viewed from the inside, FIG. 2 is an enlarged perspective view of a brake arm portion of the tape cassette shown in FIG. 1, and FIG. It is the sectional view on the AA line of FIG.

As shown in FIG. 1, the tape cassette of this embodiment has a cassette body (a portion where hub rings 6 and 6 are provided) including an upper half 1 and a lower half (the lower half is not shown). A pair of hubs (not shown) around which magnetic tape is wound are housed. In addition, a brake member 2 that presses the brake claws 23, 23 against the hub to prevent its rotation is slidably attached to the inner surface of the upper half 1. The brake member 2 has a pair of brake arms 21 and 21 provided at the left and right ends thereof, and the brake arms 21 and 21 are provided on the outer surfaces of the pair of plate-like protrusions 3 and 3 standing on the upper half 1. The lower half side of the overhanging pieces 32, 32 provided on the outer side surface of the cassette can be slid forward and rearward of the cassette. The brake member 2 is constantly urged toward the brake position by the elastic force of the built-in rod 5.

A lid 4 that opens and closes the front end of the cassette body is rotatably attached to the front end of the upper half 1. When the lid 4 is rotated in the opening direction, the lid 4 is rotated. The left and right sides of the brake arm engage the brake arms 21 and 21, and the brake member 2 slides toward the brake release position (on the front end side of the cassette). It has the same structure as the conventional product.

As shown in FIGS. 2 and 3, the tape cassette of this embodiment is fitted and fitted to the sliding contact surfaces of the break arm 21 and the plate-like projection 3, respectively. A concave portion 22 or a convex portion 31 that can slide in the closed state is provided.

The tape cassette of this embodiment will be further described. As shown in FIGS. 2 and 3, the concave portion 22 is a groove formed in the brake arm 21, and the convex portion 31 is formed in the plate-like projection 3. It is a ridge. The width of the concave portion 22 is made substantially equal to the width of the convex portion 31, and the depth of the concave portion 22 is substantially equal to or deeper than the height of the convex portion 31. That is, the vertical position of the brake arm 21 is restricted by the upper and lower surfaces (the surfaces parallel to the sliding direction) of the concave portion 22 and the convex portion 31, and the left and right positions thereof are the same as the brake arm 21 and the above. It is designed to be regulated by the sliding contact surface with the plate-like projection 3.

The width of the concave portion 22 is made substantially equal to the width of the convex portion 31 and the depth of the concave portion 22 is made substantially equal to or shallower than the height of the convex portion 31 to make the brake arm. The vertical position of 21 is restricted by the upper and lower surfaces of the concave portion 22 and the convex portion 31, and the horizontal position of the concave portion 21 is determined by the sliding contact surface or the bottom surface of the concave portion 22 and the tip surface of the convex portion 31. You may make it regulate by either.

The recess 22 may be provided at least over the entire length of the range in which the projection 31 relatively slides. Therefore, the recess 22 may be provided up to both ends of the brake arm 21 in the sliding direction. Further, the convex portion 31 may be a ridge provided to both ends of the plate-like projection 3 in the sliding direction, but may be a ridge that does not reach both ends, or one short cylindrical or prismatic shape. It may be a protrusion.

Further, the concave portion 22 of the brake arm 21 and the convex portion 31 of the plate-like protrusion 3 are replaced with each other, the convex portion 22 is provided on the brake arm 21, and the concave portion of the plate-like protrusion 3 is formed. 31 may be provided. In this case, the lengths of the convex portion 22 and the concave portion 31 in the sliding direction are appropriately set so as not to hinder the sliding.

In the tape cassette of the present embodiment configured as described above, even when the upper half 1 is not yet joined to the lower half when the cassette is assembled, the break member 2 can be moved vertically and horizontally. It is in the same condition as after assembly without excessive play. Therefore, by rotating the lid 4, both side portions of the lid 4 can be smoothly engaged with the brake arms 21 and 21. Therefore, the brake member 2 is moved to the brake release position. It can be slid toward. Therefore, in the tape cassette of this embodiment, when the cassette is assembled, the lid 4 and the brake member 2 are attached to the upper half 1 and the brake member 2 is urged by the spring 5, so that the upper half 1 is lowered. When the lid 4 is in the state before being coupled with the lid 4, the brake member 2 surely slides toward the brake release position when the lid 4 is rotated in the opening direction, and therefore, there is no possibility that cassette assembly failure occurs. Yes.

It should be noted that the present invention is not limited to the above-described embodiment, but the sliding contact surfaces of the brake arm and the plate-like projection are fitted to each other and can be slid in a fitted state. It suffices if a concave portion or a convex portion is provided.

[0019]

[Effect of device]

 In the tape cassette of the present invention, when the cassette is assembled, the lid and the brake member are attached to the upper half, and the brake member is urged by the spring so that the upper half is in a state before being joined to the lower half. In some cases, if the lid is rotated in the opening direction, the brake member surely slides toward the brake release position, and therefore, there is no possibility that the cassette is not assembled properly.

[Brief description of drawings]

FIG. 1 is a plan view of the upper half side of an embodiment of the tape cassette of the present invention as viewed from the inside.

FIG. 2 is an enlarged perspective view showing a brake arm portion of the tape cassette shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a view corresponding to FIG. 1 in a conventional tape cassette.

FIG. 5 is a perspective view of a brake arm portion of a conventional tape cassette as viewed from the outside of the cassette.

FIG. 6 is a side view of a brake arm portion of a conventional tape cassette as viewed from the front of the cassette.

[Explanation of symbols]

 1 Upper Half 2 Brake Member 21 Brake Arm 22 Recess (or Convex) 23 Brake Claw 3 Plate-like Protrusion 31 Convex (or Recess) 32 Overhanging Piece 4 Lid 5 Spring 6 Hub Ring

Claims (1)

[Scope of utility model registration request] 1. A pair of hubs around which a magnetic tape is wound are housed in a cassette body consisting of an upper half and a lower half,
A brake member for preventing rotation of both hubs is slidably attached to the upper half, a pair of brake arms are provided on the brake member in parallel with the sliding direction, and a pair of plate-like projections is provided on the upper half. In a tape cassette configured so as to stand upright toward the lower half and each of the brake arms slides along the outer surface of each of the plate-like projections. A tape cassette, characterized in that each of the contact surfaces is provided with a concave portion or a convex portion that is fitted to each other and is slidable in a fitted state.