JPH0320851Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cassette containing a tape-shaped body that requires grounding.

[Conventional technology]

Japanese Patent Application Laid-Open No. 79234/1983 discloses a cassette in which a tape-shaped electrophotographic film is housed in a roll-like case.

As shown in the above-mentioned Japanese Unexamined Patent Publication No. 59-79234, electrophotographic film, due to its characteristics, cannot be used in storage and retrieval systems for document materials, compared to films made from conventional silver salt photosensitive materials. It has various advantages that are virtually impossible to obtain. By converting this electrophotographic film into cassettes as described above, management, storage, and handling become easier.
It is expected that this will be more practical.

By the way, an electrophotographic film is formed of a tape-shaped transparent support mainly made of polyester, a transparent conductive layer, and a transparent photoconductive insulating layer, which are laminated in sequence on the support. etc., are required to be grounded.

Therefore, the conductive layer of the electrophotographic film is grounded by some means, but when the electrophotographic film is made into a cassette, an external contact electrically connected to the conductive layer is provided on the outer surface of the cassette case. This is considered to be reasonable. When this external contact is loaded into a device incorporating an electrophotographic copying device or the like, it becomes electrically connected to a contact provided on the side of the device.

[Problem that the invention attempts to solve]

In order to electrically connect the external contact and the conductive layer of the electrophotographic film, ordinary grounding means cannot be applied because the electrophotographic film is not stationary.

The present invention takes the above-mentioned facts into account, and aims to provide a cassette that can reliably electrically connect a tape-shaped body that requires grounding and an external contact point with a small number of structural members.

[Means for solving problems]

In the cassette according to the present invention, we focused on the fact that the rotational center of the reel does not change its position even when the reel is rotating, and a part of the cassette comes into pressure contact with the rotational center of the reel in order to bias the reel in the axial direction. Focusing on the fact that a leaf spring is used, the other part of which is fixed to the cassette case, the leaf spring is supported by the cassette case by a part of the external contact, and the tape-like The body and the external contact are electrically connected.

Note that the tape-shaped body that requires grounding is electrically guided to the center of rotation of the reel by appropriate means.

[Effect]

Since the leaf spring is always in pressure contact with the center of rotation of the reel, the tape-like body and the external contact are electrically connected without interruption even when the reel is rotating, that is, even when the electrophotographic film is not stationary. has been done. Further, since the leaf spring is supported by the cassette case by the external contact, the tape-shaped body and the external contact can be electrically connected reliably with a small number of structural members.

〔Example〕

1 to 15 show an electrophotographic film cassette according to an embodiment of the present invention. Each component will be explained in detail below.

(Lower Cassette Case) As shown in FIGS. 1 and 2, the lower cassette case 10 has a peripheral wall erected around and on the inner surface of a substantially U-shaped bottom plate 12 with left and right ends protruding forward. ing. The peripheral wall includes a back wall 14 erected at the rear of the bottom plate 12, left and right side walls 16 and 18 erected at the left and right sides of the bottom plate 12, and erected from the front of the bottom plate 12 to the left and right sides. Front wall 2
It is composed of 0. The back wall 14 and the left and right side walls 16 and 18 are integrated into a U-shape and are located at the outermost periphery of the bottom plate 12.

The front wall 20 is located at the outermost periphery of the bottom plate 12 at the front of the bottom plate 12, and is located inside the left and right side walls 16, 18 at the left and right sides of the bottom plate 12. A portion of the front wall 20 located inside the left side wall 16 extends to the rear in parallel with the left side wall 16, curves inward from the middle, and continues to the rear wall 14. The front wall 20 of the portion located inside the right side wall 18 extends parallel to the right side wall 18 with a slight gap to the rear side, and then curves outward and continues to the right side wall 18. There is.

The front wall 20 has a protruding wall 22 that protrudes upward from the other part of the part parallel to the left side wall 16.
is formed. A recess 24 having a semicircular cross section is formed in the upper end surface of this protruding wall 22 . Further, a protruding wall 26 is formed in a portion of the front wall 20 from a portion parallel to the right side wall 18 to the front side, the protruding wall 26 protruding upward from the other portion. This protruding wall 26
A recess 28 having a semicircular cross section is formed in the upper end surface of a portion parallel to the right side wall 18.

In the lower cassette case 10, partition walls, cylindrical or cylindrical projections, uneven parts, etc. are formed on the inner surface of the bottom plate 10, as will be described later, inside the peripheral wall. The lower cassette case 10 is constructed by integrally molding all of these components from synthetic resin.

Inside the lower cassette case 10, there are left and right reel storage chambers 30, 32 in which a pair of reels are stored.
, left and right guide roller housing chambers 34 and 36 where a pair of guide rollers are housed, a brake mechanism housing chamber 38 where a reel brake mechanism is housed, and a lock plate housing where a lock plate that fixes the guard panel is housed. A chamber 40 and an independent chamber 42 in which a claw member is provided are separated by a partition wall.

The left and right reel storage chambers 30 and 32 are located on either side of a central partition wall 44 that stands up from the bottom plate 12 at a position slightly to the right of the center of the lower cassette case 10 in the left-right direction. Left and right reel storage chambers 30, 32
There is a circular through hole 4 in the bottom plate 12 at the center of each storage chamber.
6,46 are formed. Around the openings of these through holes 46, a convex portion 48 having a rectangular cross section is formed in an annular shape on the inner surface of the bottom plate. A protrusion 50 having a rectangular cross section is formed in an annular shape concentrically with the annular protrusion 48 around the outer periphery of the annular protrusion 48 . The annular convex portion 48 and the annular convex portion 50 are slightly recessed from the surface of the bottom plate 12 to form an annular concave portion 51 . Also, the through hole 46
The outer surface of the bottom plate 12 is largely chamfered (see FIG. 8).

The left and right guide roller storage chambers 34 and 36 are located adjacent to the left and right reel storage chambers 30 and 32, respectively, at the left and right protrusions on the front side of the lower cassette case 10. Cylindrical projections 52, 5 are provided in the left and right guide roller storage chambers 34, 36 from the bottom plate 12 at the center of each storage chamber.
2 is formed to protrude to the height of the peripheral wall. Flanges 52A are formed at the bases of these cylindrical projections 52. The outer surface of the bottom plate 12 in the portion where the flange 52A is formed has a recess 52B [13
(see figure (B))] is formed. Cylindrical projection 5
The hollow portion 2 opens into this recess 52B and communicates with the outside.

Partition walls 54 and 5 partition the left and right guide roller storage chambers 34 and 36 from the left and right reel storage chambers 30 and 32.
4 is partially open, and partition walls 56, 56 facing toward the guide roller storage chambers 34, 36 are continuously formed at the end facing this opening. Further, cutouts 58, 58 are formed in a part of the front wall 20 facing the left and right guide roller storage chambers 34, 36, and the left and right guide roller storage chambers 34, 36 communicate with the outside.

The brake mechanism storage chamber 38 is located at the center of the rear side of the lower cassette case 10, adjacent to the left and right reel storage chambers 30, 32. The brake mechanism housing chamber 38 is further divided into three chambers by two partition walls 60, 60 parallel to the central partition wall 44, with the central chamber serving as a release piece housing chamber 62, and the left and right chambers serving as brake lever housing chambers. 64,64.

The release piece storage chamber 62 has a bottom plate 1 in the center of the chamber.
A circular through hole 66 is formed in 2. Through hole 6
The outer surface of the bottom plate 12 of No. 6 is chamfered. Bottom plate 12 of brake lever housing chambers 64, 64
Two cylindrical projections 68, 70, 68, 70 are formed adjacent to each other in the left and right direction and protrude beyond the height of the peripheral wall. Among these cylindrical projections, flanges 68A, 68A are formed at the bases of the cylindrical projections 68, 68 located on the inner side.

Partitions 60, 60 that partition the release piece storage chamber 62 and the left and right brake lever storage chambers 64, 64 are partially formed with cutouts 72, 72, so that the two chambers communicate with each other. Further, partition walls 74, 74 that partition the left and right brake lever storage chambers 64, 64 and the left and right reel storage chambers 30, 32 are also partially open, so that the two chambers communicate with each other. The left and right brake lever storage chambers 6 near this opening
Recesses 76, 76 are formed in the reel storage chambers 4, 64 and the left and right reel storage chambers 30, 32, respectively, spanning both chambers.

The lock plate storage chamber 40 is located on the front left side of the lower cassette case 10. The lock plate storage chamber 40 is partitioned in the left and right direction by a left side wall 16 and a front wall 20 located inside the left side wall 16, and is partitioned at the rear by a partition wall 80 whose ends are continuous with both walls. The partitioned portion on the side serves as a rear chamber 82. A cylindrical projection 83 is formed on the bottom plate 12 of the rear chamber 82 to protrude beyond the height of the peripheral wall.

Further, the lock plate storage chamber 40 includes a lock plate retaining wall 84 that continues to the front end 16A of the left side wall 16 that is bent inward and extends forward, and a portion located inside the left side wall 16. Front wall 20
A front chamber 88 is partitioned in the left and right direction by a front wall 86 extending leftward from the front wall 20 located inside the left side wall 16. . Lock plate retaining wall 8
4 is not continuous with the front wall 86, and an opening 90 is formed between the lock plate retaining wall 84 and the front wall 86. Further, a notch 92 is formed in the lock plate retaining wall 84.

The independent chamber 42 is located adjacent to the rear of the lock plate housing chamber 40. The independent room 42 is located on the left side wall 16
and the front wall 20 located inside the left side wall 16.
The front side is partitioned by , and the rear side is partitioned by a partition wall 94 . The bottom plate 12 of the independent chamber 42 is separated from the rest of the bottom plate 12 except for one part (two places), and the bottom plate of the separated part is attached to the claw piece 9.
6. When this claw piece 96 is pressed with a finger or the like, the connection portion with the other portion of the bottom plate 12 is easily broken, and the claw piece 96 can be separated from the lower cassette case 10.

Cylindrical protrusions 98, 98, 98 are formed at the rear left and right corners and the front center of the lower cassette case 10 to protrude from the inner surface of the bottom plate 12 to the height of the peripheral wall. The hollow portions of these cylindrical projections 98 are also open to the outer surface of the bottom plate 12. In addition, a partition wall 100 is formed in the hollow portion of these cylindrical projections 98 at a portion slightly downward from the tip, dividing the hollow portion into upper and lower halves. A circular through hole 102 is formed in the center of the partition wall 100, and the hollow portion divided into two upper and lower portions is communicated with each other through the through hole 102. This partition wall 100 has a tuft pin screw 3 which will be described later.
18 heads are abutted and locked.

Most of the peripheral wall of the lower cassette case 10, the partition walls 54, 54 between the left and right reel storage chambers 30, 32 and the left and right guide roller storage chambers 34, 36, the partition walls 56, 56 and the partition wall 94 that are continuous with these partition walls 54, Approximately half of the upper end surface protrudes from the remaining surface in a step-like manner in order to connect the upper cassette case 104 to the upper cassette case 104, which will be described later.

(Upper cassette case) As shown in FIGS. 1 and 3, the upper cassette case 104 has left and right ends 106B and 106C of the rectangular main body 106A on the front side (inverted in FIG. 3). The top plate 1 has a shape that slightly protrudes toward the rear side in the figure.
A peripheral wall is provided vertically around and inside the 06.
Note that the protrusions 106B, 1 at the left and right ends of the top plate 106
06C has a step with the rectangular main body 106A, and is located at a high position when viewed from the inner surface side and at a low position when viewed from the outside surface side. The peripheral wall is the lower cassette case 10.
Rear wall 14 erected, left and right side walls 16,1
8 and the front wall 20, respectively, and a rear wall 108 having a shape that corresponds to and contacts the front wall 20, and left and right side walls 110, 1.
12 and a front wall 114.

The front wall 114 has a recessed wall 116 which is recessed in a part parallel to the left side wall 110 than in other parts.
is formed. A recess 118 having a semicircular cross section is formed in the lower end surface of this recessed wall 116 (which becomes the upper end surface in the upside down state in FIG. 3). Concave wall 1
Reference numeral 16 has a shape that fits into the protruding wall 22 formed on the front wall 20 of the lower cassette case 10, and when the recess 118 and the recess 24 formed on the protruding wall 22 face each other, a shaft support hole with a circular cross section is formed. 120 [Figure 13 (B)
Reference).

Further, a recessed wall 122 is formed in a part of the front wall 114 from a part parallel to the right side wall 112 to the front side, which is more recessed than the other part. A recess 124 with a semicircular cross section is provided on the lower end surface of this recessed wall 122.
is formed. The concave wall 122 has a shape that fits into the protruding wall 26 formed on the front wall 20 of the lower cassette case 10, and when fitted, the concave portion 124 and the protruding wall 2
The recessed portion 28 formed in the recessed portion 6 faces the shaft support hole 126 (see FIG. 13A) having a circular cross section.

Inside the upper cassette case 104, there are left and right reel storage chambers 1 which correspond to the respective chambers formed in the lower cassette case and serve as upper chambers thereof.
28, 130, and left and right guide roller storage chambers 13
2, 134, a brake mechanism housing chamber 136, a lock plate housing chamber 138, and an independent chamber 140 are formed.

The left and right reel storage chambers 128 and 130 are the left and right reel storage chambers 3 formed in the lower cassette case 10.
No. 0 and 32, no partition is formed between the left and right chambers, and the left and right chambers communicate with each other. In the left and right reel storage chambers 128 and 130, arcuate ribs 142 and radially extending linear ribs 144 are formed protruding from the top plate 106 for the purpose of reinforcing the top plate 106 and the like.

In addition, three short cylindrical projections 146 are formed protruding from the top plate 106 at the left and right ends of each of the left and right reel storage chambers 128 and 130, although asymmetrically. Furthermore, only in the right reel storage chamber 130, two through holes 148, 148 having a circular cross section are formed in series in the front and rear direction at the right end portion.

The left and right guide roller storage chambers 132 and 134 have a cylindrical projection 15 extending from the top plate 106 at the center of each storage chamber.
0.150 is formed to protrude near the height of the peripheral wall. Flanges 150A are formed at the bases of these cylindrical projections 150. These cylindrical projections 150, 150 are connected to the upper cassette case 104.
When the lower cassette case 10 is joined to the lower cassette case 10, the left and right guide roller storage chambers 3 of the lower cassette case 10
Cylindrical protrusions 5 formed protrudingly on 4 and 36, respectively.
Located directly above 2,52. At this time, both ends of both cylindrical projections 150 and 52 are brought into contact with each other. Note that the inner diameter of the hollow portion of the cylindrical projection 150 is slightly smaller than that of the hollow portion of the cylindrical projection 52, and the base side is closed and does not communicate with the outside.

The partition walls 152, 152 that partition the left and right guide roller storage chambers 132, 134 and the left and right reel storage chambers 128, 130 are partially open, as in the case of the lower cassette case 10, and similarly, there is a surface in this opening. A guide roller storage chamber 132 is provided at the end of the
Partition walls 154, 154 facing toward the 134 side are formed continuously. Similarly, the front wall 11 facing the left and right guide roller storage chambers 132, 134
Notches 156, 156 are formed in a part of the roller 4, and the left and right guide roller storage chambers 132, 134 communicate with the outside. These notches 156, 15
When the upper cassette case 104 is joined to the lower cassette case 10, tape inlet/outlet ports 158, 1 with a rectangular cross section face the notches 58, 58 formed in the front wall 20 of the lower cassette case 10, respectively.
58 (see FIG. 13A).

The brake mechanism housing chamber 136 is not partitioned into three chambers like the brake mechanism housing chamber 38 formed in the lower cassette case 10. Moreover, no opening is formed in the partition walls 160, 160 between the left and right reel storage chambers 128, 130. At the center of the brake mechanism storage chamber 136, there is a low guide wall 162 with two parallel surfaces extending in the front-rear direction of the upper cassette case 104.
162 is installed vertically. From the outer surface side of these guide walls 162, two guide walls 164, 164, 16 are formed at the same height as the guide walls 162 in the left and right direction.
4,164 extends a slight length. At the extending ends of these guide walls 164, there are stepped protrusions 166,
166, 166, 166 are formed protrudingly.

Further, in the brake mechanism storage chamber 136, cylindrical projections 168, 168 are formed protruding from the top plate 106 on the left and right sides of the rear side up to a height near the peripheral wall. When the upper cassette case 104 is joined to the lower cassette case 10, these cylindrical protrusions 168 fit into the inner hollow portion of the protrusions 68, 68 formed protrudingly in the brake mechanism housing chamber 38 of the lower cassette case 10. It is becoming more and more common.

A cylindrical projection 170 is formed in the lock plate storage chamber 138 to protrude from the top plate 106 to a height close to the peripheral wall. When the upper cassette case 104 is joined to the lower cassette case 10, the cylindrical projection 170 is formed so that the cylindrical projection 83 protrudingly formed in the lock plate accommodation chamber 40 of the lower cassette case 10 is fitted into the inner hollow part. It is becoming more and more like this. The lower cassette case 10 is placed on the top plate 106 of the independent room 140.
There are no claws like those formed on the bottom plate 12 of the present invention, and the independent chamber is a rectangular parallelepiped chamber with only one side open.

A projection 171 projects from the inner surface of the front left corner of the top plate 106 of the upper cassette case 104, and a recess 173 is formed between the projection 171 and the front wall 114 in a portion parallel to the left side wall 110. [See also Figure 13B].

Cylindrical projections 172, 172, 172 are formed on the rear left and right corners and the front center of the upper cassette case 104 to protrude from the inner surface of the top plate 106 beyond the height of the peripheral wall. Note that the hollow portions of these cylindrical projections 172 are closed on the base side and do not communicate with the outside.

Most of the peripheral wall of the upper cassette case 104, partition walls 152, 15 between the left and right reel housing chambers 128, 130 and the left and right guide roller housing chambers 132, 134
2 and the partition wall 15 continuous to these partition walls 152
4, 154 has approximately half of its upper end surface protruding slightly from the remaining surface in a step-like manner in order to be jointed with the lower cassette case 10 mentioned above. Further, the partition wall 174 that partitions the rear side of the independent chamber 140 is at the same height as the step-like protruding surface, and is connected in a spigot to the partition wall 94 of the independent chamber 42 formed in the lower cassette case 10. There is.

On the outer surface of the top plate 106 of the upper cassette case 104, as shown in FIG. A convex portion 176 is formed to protrude. The protruding height of this convex portion 176 is small, and there are concave portions 178, 178, 178, 1 at four locations in the middle of the convex portion 176.
78 is formed. Further, these recesses 178 are located in a staggered manner, and the upper cassette case 104
A through hole 14 is provided between adjacent ones in the left and right direction.
8 openings are located.

The upper cassette case 104 is the lower cassette case 1.
Like 0, everything is integrally molded from synthetic resin.

(Reel) Reel 1 as shown in Figures 1 and 4.
80, a flange 182 and a hub 184 are integrally molded from synthetic resin. A large number of rectangular teeth 186 are formed at equal intervals on the outer peripheral surface of the flange 182. The hub 184 is formed from a cylindrical inner tube 188 and a cylindrical outer tube 190, both of which are connected to the inner tube 1.
They are connected by eight ribs 192 extending radially from 88. The inner tube 188 is open on the lower surface side, the outer tube 190 is open on the upper surface side, and both surfaces are closed on the other side.

An annular convex portion 194 having a rectangular cross section and concentric with the flange 182 is formed on the lower surface side of the flange 182 . The annular outer diameter of this annular convex portion 194 is the same as that of the through holes 46 and 4 formed in the lower cassette case 10.
It is formed to have a diameter that allows it to freely fit with 6. Further, a protrusion 196 having a rectangular cross section is formed in an annular shape concentrically with the annular protrusion 194 around the outer periphery of the annular protrusion 194 .

In the hub 184, approximately 1/8 section of the outer cylinder 190 is partially open, and the ribs 192, 192 extending radially from the inner cylinder 188 are continuous to the open end surface. Note that these ribs are given symbols 192A and 192A to distinguish them from other ribs. These ribs 192A have a higher protruding height than the other ribs 192, and are at the same height as the upper surface of the outer cylinder 190. Also these ribs 192
Step portions 192B, 192B protruding in directions opposite to each other are formed in a continuous portion with the outer cylinder 190 at A.

Inner cylinder 188 in the portion facing the opening of outer cylinder 190
The outer peripheral surface of is a flat plate surface 193 (see also Fig. 5)
is formed. A groove 195 extending in the height direction is formed in the center of the flat plate surface 193 in the circumferential direction. .

On the upper surface of the inner cylinder 188, short cylindrical projections 198, 198 are formed projecting at two locations in the diametrical direction. Note that these short protrusions 198 are connected to the flat plate surface 193.
It is located on the diameter line of the inner cylinder 188 passing through the groove 195 formed in the inner cylinder 188 . In the hollow part of the inner cylinder 188, nine protrusions 20 are provided at equal intervals from the inner surface toward the center.
0,...200 are formed protrudingly. These protrusions 200 have a trapezoidal cross section and extend in the height direction.

As shown in FIG. 6, the lower end 188A of the inner cylinder 188 protrudes from the lower surface of the flange 182, and the ribs 202, .
2 is formed.

A clamp 204 is disposed in an opening formed in the outer cylinder 190 of the hub 184 to tighten the reel 180.
The end of the tape 222 is locked.

(Clamp) As shown in FIGS. 1 and 4C, the clamp 204 includes a base portion 206 having an outer circumferential curvature approximately equal to the outer circumferential curvature of the outer cylinder 190 of the hub 184, and a base portion 206 extending from both ends of the base portion 206 to the center of curvature. Opposite leg plate part 20
8, 208, and both ends are both leg plate parts 208, 208
The bent plate part 210 has a dogleg-shaped cross section and is continuous to the bent plate part 210. Step portions 208B, 208B are formed to protrude from the outer surface of the tip end side of both leg plate portions 208. The clamp is integrally molded from synthetic resin.

As described above, the clamp 204 is disposed in the opening formed in the hub outer cylinder 190 of the reel 180, and at this time, the contact piece fitting 212 is disposed at the same time.

(Touch piece metal fitting) As shown in FIGS. 1 and 4, the contact piece metal fitting 212, which is a grounding piece, is composed of a single metal flat plate that has been subjected to bending, stamping, and shearing. has been done. The contact piece fitting 212 is bent at a right angle approximately at the center. A convex surface 214 with a semicircular arc cross section that protrudes outward is formed by bending approximately the center of one of the bent surfaces 212A;
The center of the top of this convex surface 214 is stamped to form a hemispherical convex portion 216 that protrudes outward. Further, holes 218, 218 are formed by shearing at both ends of the convex surface 214 in the plate longitudinal direction.

The other bent surface 212B is sheared to form a rectangular cutout 220. This notch 220 communicates with the outside at the longitudinal end of the plate. Further, this surface is slightly bent outward near the right angle bending portion at the substantially central portion of the flat plate, and further slightly bent inward at the substantially central portion.

(Tape) As shown in FIG. 1, a tape 222 housed in a cassette case is made up of a sensitive material tape 224, a magnetic tape 226 which is a memory tape, and a leader tape 228 spliced together by a splicing tape 230. . Further, a conductive adhesive tape 232 is attached to the end of the sensitive material tape 224 on the side opposite to the splicing side.

The sensitive tape 224 is a tape-shaped electrophotographic film in which a conductive layer such as aluminum and a photoconductive insulating layer such as polyvinyl carbazole, which is an organic semiconductor, are sequentially laminated on an insulating support such as transparent polyester. It is composed of The conductive adhesive tape 232 is constructed by providing an adhesive layer in which conductive particles such as carbon are dispersed and blended on a thin metal tape.

When attaching the conductive adhesive tape 232 to the sensitive tape 224, a portion of the photoconductive insulating layer of the sensitive tape 224 is peeled off, and the conductive adhesive tape 232 is attached to the exposed conductive layer.

(Latching the tape to the reel) The tape 222 is locked to the reel 180 in the following manner. First, hub 1 of reel 180
A contact piece metal fitting 212 is disposed at 84. . The metal fitting 212 has a hole 21 formed on one side 212A.
8 and 218 are fitted into rectangular protrusions 198 and 198 formed on the upper surface of the inner cylinder 188 of the hub 184, respectively. Since the diameters of the holes 218 and the short protrusions 198 are set so that they are a tight fit, there is no problem in keeping them fitted, but after they are fitted, the tip of the short protrusions 198 is caulked with heat. This ensures that the contact piece fitting 2
12 can be prevented from slipping out.

One surface 212A of the contact piece fitting 212 is positioned as described above, and the other surface 212B is located in the inner cylinder 1.
88, and the upper end of this surface 212B is located along the flat plate surface 193 formed on the outer peripheral surface of the
93 , and the lower end comes into line contact with the flat plate surface 193 .

Clamp 204 is then attached as shown in FIG.
is pressed into the opening formed in the outer cylinder 190 of the hub 184 with the end of the tape 222 wound around it. The tape 222 is a sensitive material tape 224 on the reel 180 stored in the right reel storage chamber.
The end of the leader tape 228 is locked to the reel 180 accommodated in the left reel storage chamber. Note that the sensitive tape 224 is attached to the clamp 204 so that the conductive adhesive tape 232 is on the surface.
is wound around.

The clamp 204 has a stepped portion 192 in which stepped portions 208B and 208B are formed on the ribs 192A and 192A.
B, 192B to prevent the reel from coming off in the radial direction. Further, as shown in FIG. 6, the central bent part of the bent plate part 210 of the clamp 204 enters the notch 220 formed in the contact fitting 212 and passes through the hole, so that it is restricted by the upper end surface of the opening of the notch 220 and moves upward. is prevented from escaping. Note that the tip of the central bent portion of the bent plate portion 210 is the flat plate surface 19.
It is located within the groove 195 formed in 3. Furthermore, the clamp 204 is press-fitted, and the leg plate part 208 is bent inward from the connection part with the curved plate part 206, and at the same time, the bent plate part 210 is also bent, so that the shape restoring force causes the step parts 192B, 192B to bend. is pressed into contact with. Therefore, the clamp 204 is disposed on the hub 184 without rattling. The tape 222 is pressed between the leg plate part 208 of the clamp 204 and the rib 192A, is further bent at a number of corners, and is pushed into the notch 220 of the contact piece fitting 212 by the central bent part of the bent plate part 210. Since it is supported in this manner, it is reliably latched to the reel 180.

By pushing the tape 222 into the notch 220, the conductive adhesive tape 232 is surely pressed against the contact piece fitting 212, especially on the sensitive tape 224 side, and the electrical connection between the two is ensured.

The reels 180, 180 to which the tape 222 is secured as described above are housed in the left and right reel housing chambers 30, 32 of the lower cassette case 10.

(Placement of the reel in the lower cassette case) As shown in Figs. 7 and 8, reel 1
80, 180 are through holes 4 formed in the left and right reel storage chambers 30, 32 of the lower cassette case 10.
Annular protrusions 194 formed on the lower surface of the flange 182 are fitted into the annular protrusions 6 and 46, respectively. Furthermore, prior to this fitting, the reel storage chamber 3
0 and 32 are made of sliding sheets 234 and 234 (No. (see Figure 1) is placed in the annular recesses 51, 51. reel 180,1
80 is stored in the reel storage chambers 30 and 32 and the eighth
As shown in the figure, an annular protrusion 196 formed on the lower surface of the flange 182 is placed in contact with the sliding sheet 234 laid in the annular recess 51.

In this state, the groove depth of the annular recess 51 is reduced by the thickness of the sliding sheet 234, so that the annular protrusion 4 formed in the reel storage chambers 30, 32
8 and 50 are not in contact with the lower surface of the flange 182.

The middle part of the tape 222, whose both ends are locked to the reels 180, 180, is connected to the left and right guide rollers 236,
236.

(Guide Roller) As shown in FIGS. 1 and 9, the guide roller 236 is constructed by assembling a hub member 238 and two flange members 240, 240,
Each member is integrally molded from synthetic resin. The hub member 238 has an outer cylinder 242 and an inner cylinder 244.
are connected by ribs 246 and are integrated. The inner cylinder 244 is longer than the outer cylinder 242, and both ends protrude slightly from the ends of the outer cylinder 242.
A large diameter portion 248 is formed on the outer periphery of the central portion of the inner cylinder 244 . The large diameter portion 248 protrudes stepwise from the outer circumferential surface of the inner cylinder of the other portion. The hollow part of the inner cylinder 244 has a large diameter part 250A having a slightly larger inner diameter than the intermediate part at one end, and a small diameter part 250B having a slightly smaller inner diameter than the intermediate part at the other end.
It is becoming.

A total of eight ribs 246 are arranged radially at equal intervals and connect the inner cylinder 244 and the outer cylinder 242. Four ribs 246 are arranged on one side with the large diameter portion 248 of the inner cylinder 244 as a boundary. Four ribs 246 are arranged at 90° intervals, and four ribs 246 are arranged at 90° intervals with a phase shift of 45° from the other rib 246.

The flange member 240 includes a disk-shaped flange portion 252 having an opening in the center, four leg portions 254 hanging from the flange portion 252 and arranged at equal intervals,...
254 are integrated. Flange part 252
An annular convex portion 256 protruding stepwise from the flange portion 252 is formed around the opening. Legs 2
54 extends from the annular convex portion 256 and has an inner surface that is continuous with the opening end surface of the flange portion 252 .
Each leg portion 254 has a hook-shaped locking portion 258 that bends inward at its distal end. The back surface of the locking portion 258 is chamfered toward the inner surface to form an inclined surface 258A.

The hub member 238 and flange member 240 are assembled as follows. The flange member 240 has legs 254 that are connected to the outer cylinder 242 of the hub member 238 and the inner diameter 2.
44, and the flange portion 252 is pressed toward the hub member 238 side. Flange part 252
When pressed, the locking portion 258 of the leg portion 254 presses into contact with the large diameter portion 248 formed in the inner cylinder 244,
An inclined surface 258A formed on the locking portion 258 is guided by the large diameter portion 248 and advances to the inner part.

The locking portion 258 passes through the large diameter portion 248 as the leg portion 254 bends outward, and at the same time as the leg portion 254 passes, the shape of the leg portion 254 is restored and is locked to the rising surface of the large diameter portion 248 . In this state, the flange portion 252
is in contact with the end surface of the outer cylinder 242, and the flange portion 252
The outer peripheral surface of the annular convex portion 256 formed in the outer cylinder 24
It is in contact with the inner circumferential surface of No. 2. Other flange member 2
40 is assembled from the opposite side of the hub member 238 in the same manner as described above. At this time, the leg portion 252 is assembled with a phase shift of 45° from the leg portion 254 of the flange member 240 that has already been assembled.

Guide roller 23 integrated as above
6,236 are the left and right guide roller storage chambers 34, 3 of the lower cassette case 10, as shown in FIG.
It is accommodated in 6. At this time, roller shafts 260, 260 (see FIG. 1) are fitted in advance into projections 52, 52 formed in the left and right guide roller housing chambers 34, 36.

These roller shafts 260 are metal cylindrical bodies.
As shown in the figure, a large diameter portion 260A having a slightly larger diameter than the other portion is formed on the outer periphery of one end. The roller shafts 260, 260 are fitted into the protrusions 52, 52 with the large diameter portion 260A facing downward. The guide rollers 236, 236 are connected to the inner cylinder 2 of the hub member 238.
The hollow portion 44 is fitted onto the roller shaft 260 with the large diameter portion 250A facing downward. In the guide roller 236, the lower end surface of the inner cylinder 244 is supported in contact with a flange portion 52A formed at the base of the protrusion 52, and the large diameter portion 250A of the inner cylinder 244 is supported by the large diameter portion 260A of the roller shaft 260. The small diameter portion 25 of the inner cylinder 244
0B is pivotally supported on the upper part of the roller shaft 260.

(Brake Lever) As shown in FIGS. 1 and 10, the brake lever 262 has a cylindrical base 264 and a base 264.
Reel engaging piece 266 extending from the outer peripheral surface of 64
and the base 26 at a distance of 90 degrees from the reel locking piece 266.
Release piece engagement piece 2 extending from the outer peripheral surface of 4
68 are integrally molded from synthetic resin.
The reel engaging piece 266 extends from the entire height direction of the base portion 264, and a claw portion 270 is formed at the tip thereof to be bent toward the side opposite to the release piece engaging piece 268 and to extend slightly downward. Reel engaging piece 26
A spring receiving piece 271 whose tip portion is bent toward the release piece engaging piece 266 side extends upward from the middle part of the upper end surface of the spring receiving piece 6 .

The release piece engaging piece 268 has a shorter extension length than the reel engaging piece 266 from the base to the tip of the base 264, and extends from the upper end of the base to near the middle in the height direction of the base 264. It extends from. Release piece engagement piece 268
A release piece abutting portion 272 is formed at the tip of the reel engaging piece 266 and slightly extending upward.

The brake lever 274 is the brake lever 262
It has a symmetrical shape.

Brake lever 26 as shown in FIG.
2,274 are left and right brake lever storage chambers 64,
64 to the protrusions 68, 68 formed in the base 26.
4,264 hollow parts are fitted and accommodated in these storage chambers. Brake lever 262, 274
After the projections 68, 68 are fitted, the coil portions of the torsion coil springs 276, 276 (see FIG. 1) are fitted. These torsion coil springs 276
, one arm is locked to the projections 70, 70 formed in the left and right brake lever housing chambers 64, 64, and the other arm is locked to the spring receiving pieces 271, 271.
It is locked to.

The brake levers 262, 274 are biased by these torsion coil springs 276, and the brake lever 262 is given a rotational force in the clockwise direction in FIG. 7, and the brake lever 274 is given a rotational force in the counterclockwise direction in FIG. has been granted. Brake lever 2
62, 274 are left and right brake lever storage chambers 6
The reel engaging pieces 266, 266 enter the left and right reel housing chambers 30, 32 through openings formed in partition walls 74, 74 that partition the reel housing chambers 4, 64 and the left and right reel housing chambers 30, 32. . Claw portions 27 formed at the tips of these reel engaging pieces 266
0,270 is the tooth 186 and tooth 1 formed around the outer periphery of the flange 182 of the reel 180, 180.
It is located between 86 and 86.

On the other hand, the left and right brake lever storage chambers 64, 64
and the release piece storage chamber 62.
The release piece engaging pieces 268, 268 enter the release piece housing chamber 62 through the notches 72, 72 formed at 0, 60.

Note that the brake levers 262 and 274 are
Flange portion 6 formed at the base of 8, 68
The lower end surfaces of the bases 264, 264 are abutted and supported by the reel engaging pieces 266, 266 8A, 68A.
does not come into sliding contact with the bottom plate 12 of the lower cassette case 10. Further, claw portions 270, 270 having portions extending downward from the reel engaging pieces 266, 266
Since the flanges 68A, 68A are located in the recesses 76, 76 formed in the bottom plate 12, the flanges 68A, 68A do not come into sliding contact with the bottom plate 12 due to the added height.

(Release Piece) As shown in FIGS. 1 and 11A and 11B, the release piece 278, which is a brake release member, includes a main body 280 having a substantially rectangular parallelepiped shape and a rectangular flange extending from the bottom of the main body 280. 282
and the brake lever contact portion 2 protruding from these.
84 and 284 are integrally molded from synthetic resin. The brake lever contact parts 284, 284 protrude from near both left and right ends of the rear wall of the main body part 280, extend in the height direction, and have lower portions integrated with the flange part 282.

The inside of the main body part 280 is hollow, and this hollow part has a partition wall 28 that divides the hollow part into two in the front and rear direction.
6 is formed. The partition wall 286 is the main body part 280
It has an inclined surface 286A that rises at an angle of about 60 degrees from the lower rear opening end surface, and the inclined surface 286A further bends upward in the middle to become an inclined surface 286B,
It is connected to one end of the top wall of the main body section 280, and the other end of the top wall is continuous to the front wall. The front wall is inclined to widen downward, and a recess 288 is formed by this front wall and the partition wall 286 of the inclined surface 286B. The left and right side walls of the main body 280 protrude from the top wall, and the protrusions form sliding contact portions 290 and 2 with the upper cassette case 104.
It has become 90.

The release piece 278 is accommodated in the release piece storage chamber 62, the back surface of the flange portion 282 contacts the bottom plate 12 of the lower cassette case 10, and the brake lever contact portions 284, 284 engage the release piece of the brake levers 262, 274. Piece 268,
It faces the release piece abutting portions 272, 272 formed at the distal end portion of 268. Also, a through hole 66 formed in the center of the release piece storage chamber 62
An inclined surface 286A is located above.

It goes without saying that the release piece 278 is not limited to the shape of the above embodiment, and may have a shape as shown in FIG. 11C, for example.

(Lock Plate) As shown in FIGS. 1 and 12, a lock plate 292 is a locking means for the guard panel.
is a cylindrical base 294, a guard panel locking piece 296 extending from the outer periphery of the base 294, and a base 294 spaced 180 degrees from the guard panel locking piece 296.
A leaf spring piece 298 extending from the outer periphery is integrally molded from synthetic resin. The guard panel locking piece 296 extends in the height direction of the base 294 from slightly above the lower end of the base to near the center, and a locking block 300 is formed at the bottom of the tip to protrude laterally, and from the top of the center. An unlocking block 302 is formed protruding in the same direction as the locking block 300.

The leaf spring piece 298 has a short length in the height direction of the base 294 and is thin, so that the locking block 300 is attached from the middle.
It is bent towards the protruding side. The lower end surface of the leaf spring piece 298 is located slightly above the lower end of the base 294.

As shown in FIG.
It is fitted into a protrusion 83 formed at 0 and is housed in the lock plate housing chamber 40. In the lock plate 292, the tip of the leaf spring piece 298 comes into elastic pressure contact with the inner wall of the left side wall 16, and the guard panel locking piece 296 is given a clockwise rotational force. The guard panel locking piece 296 is biased and presses into contact with the lock plate locking wall 84, and the tip side of the locking block 300 protrudes from the opening 90.
The distal end side of the unlocking block 302 protrudes from the notch 92.

(Reel presser) As shown in Figure 1, the reel presser 304
It consists of a single flat metal plate that has been bent and sheared. Reel presser 304
Three holes 306, 306, 306 are formed at the tip of the base, and an approximately triangular opening 3 is formed at the approximately triangular free end side.
08 is formed. The tip on the free end side is arcuate.

The reel pressing spring 310 is the reel pressing spring 3.
It has the same structure as 04, and the free end side has the same shape, but the base side has a shape that extends so that the entire reel pressing spring has a substantially dogleg shape. There are three holes 312, 312, 312 on the base side.
and two holes 314, 314 are formed.

The contact fitting 316, which is an external contact, is integrally formed with a large-diameter upper cylindrical portion whose upper surface is spherical and a narrow-diameter lower cylindrical portion. 2 contact fittings 3
16, 316, the lower cylindrical part is the reel pressing spring 31
The lower ends of the rear lower cylindrical portions inserted into the two holes 314, 314 formed in the reel presser spring 310 are caulked and fixed to the reel presser spring 310.

Reel pressing spring 304 and two contact fittings 3
The reel presser springs 310 to which 16 is fixed are located in the left and right reel housing chambers 128 of the upper cassette case 104,
It is fixed to 130. The reel pressing spring 304 is formed by fitting the three holes 306 into the three short protrusions 146 formed in the left reel storage chamber 128, and then the tips of the short protrusions 146 are caulked with heat and attached to the top plate. It is fixed at 106. The reel pressing spring 310 is similarly fixed to the top plate 106 of the right reel housing chamber 130. Two contact fittings 316
are two through holes 14 formed in the top plate 106.
8, and the spherical upper end surface slightly protrudes from the outer surface of the top plate 106.

(Joining of upper and lower cassette cases) Lower cassette case 10 and upper cassette case 10
4 is made by superimposing the lower cassette case 10 with the inner surface of the bottom plate 12 facing upward, and the upper cassette case 104 with the inner surface of the top plate 106 facing downward. Both cassette cases 10,
As described above, the side surfaces of the protrusions formed on the peripheral wall or the like are in contact with each other, and the top surface of one protrusion is in contact with the surface on which the other protrusion rises, so that the two are joined in a spigot joint.

On the other hand, the cylindrical projections 150, 150 formed on the upper cassette case 104 are connected to the roller shaft 260,
260 and lower cassette case 10.
The roller shafts 260, 260 are supported together with the cylindrical projections 52, 52 formed in the roller shafts 260, 260. Cylindrical projection 16 formed on the upper cassette case 104
The hollow portions of 8 and 168 fit into the cylindrical projections 68 and 68 formed on the lower cassette case 10, and support the cylindrical projections 68 and 68 on both sides. Cylindrical projection 170 formed on the upper cassette case 104
The hollow part fits into the cylindrical projection 83 formed on the lower cassette case 10, and supports the cylindrical projection 83 on both sides. The cylindrical projections 172, 172, 172 formed on the upper cassette case 104 are similar to the cylindrical projections 9 formed on the lower cassette case 10.
It fits into the hollow parts of 8, 98, and 98.

the cylindrical projections 52, 52 and 98, 98;
Tatsupin screws 318, ... 318 are inserted into the hollow portion of 98 from the opening on the outer surface of the bottom plate 12, and these tatsupin screws 318 are inserted into the respective protrusions on the upper cassette case 104 side that are fitted with the respective protrusions on the lower cassette case 10 side. to be screwed together. In addition, these Tatsu pin screws 31
The head part 8 does not protrude from the outer surface of the bottom plate 12.
In this way, the lower cassette case 10 and the upper cassette case 104 are fixed together, and as shown in FIG.
Configure.

(Guard Panel) As shown in FIGS. 1, 13, and 14, the guard panel 322, which is the lid of the cassette case body 320, has a front wall 324, left and right side walls 326, 328, and a top wall 330. It is composed of. On the inner surfaces of the left and right side walls 326, 328, a protrusion 332 is provided on the upper rear side in parallel with the front wall 324.
334 is formed. The protrusion 332 formed on the left side wall has a large diameter at the base and a small diameter at the tip, and a protrusion 336 protruding in the radial direction is formed at the large diameter part. The protrusion 334 formed on the right side wall 328 has the same diameter as the narrow diameter portion of the protrusion 332, and has approximately the same protrusion length as this narrow diameter portion.

The inner surface of the left side wall 326 has a recess 3 at the lower rear side.
38 is formed. This recess 338 is open on the lower surface. On the right side of the outer surface of the upper wall 330, two protrusions 340, which are guide rails, are formed in series with the substantially U-shaped protrusions 176, which are guide rails, formed on the outer surface of the upper cassette case 104. . The protrusion height of this protrusion 340 is the same as that of the protrusion 176. A recess 342 is formed on the left side of the inner surface of the upper wall 330, and this recess 342 opens to the rear surface. Four cutouts 346A to 346D are formed in the lower part of the front wall 324 and from the front wall to the right side wall 328.

(Attachment of the guard panel to the cassette body) The guard panel 322 is attached to the cassette case body 320 after the torsion coil spring 344 is placed on the protrusion 332. Torsion coil spring 3
44 has a coil portion fitted into the large diameter portion of the projection 332, one end of which is locked to the projection 336, and an arm portion of the other end that is temporarily locked to a recess 342 formed in the top wall 330. The shaft support holes 120 and 126 are formed in the cassette case body 320 at the joint between the lower cassette case 10 and the upper cassette case 104 as described above, and the guard panel 32 is inserted into these holes.
2 are fitted together.

First, the protrusion 332 is fitted into the shaft support hole 120 formed on the left side of the cassette case body 320. The small diameter part on the tip side of the projection 332 is connected to the shaft support hole 12.
0, but just before that, the locking position of the arm portion of the torsion coil spring 344 is moved from the recess 342 to the recess 173 of the upper cassette case 104.
Next, the protrusion 334 is fitted into the shaft support hole 126 formed on the right side of the cassette case body 320. As a result, the guard panel 322 is attached to the cassette case body 320, and the cassette assembly is completed as shown in FIG. 15. In this completed state, the guard panel 322 is biased by the torsion coil spring 344, and a rotational force is applied downward when viewed from the front of the cassette.

(Apparatus in which the cassette is loaded) FIG. 16 schematically shows a cassette holder of the apparatus in which the cassette of this embodiment is loaded. The cassette holder 348 has a link-type lifting mechanism 350.
It is supported by and can be lifted upwards of the device.
The cassette holder 348 has two contact springs 352 extending downward from the cassette insertion side (arrow A in the figure indicates the cassette insertion direction) toward the back.
354 is arranged parallel to the cassette insertion direction. Both contact springs 352 and 354 are bent near their tips, and the tips are directed upward.

A pressing block 356 is disposed in an opening formed on one side of the cassette holder 348. The pressing block 356 is fixedly attached to one end of the leaf spring 358, and its tip protrudes from the opening. Furthermore, hook-shaped stoppers 360 and 362 are provided on the bottom of the cassette holder 348, and the lower cassette case 10
Through holes 364, 3 corresponding to through holes 46, 46 of
64 is formed.

(Effect of Example) Next, the operation of this embodiment will be explained.

When not in use, such as when storing or moving the cassette,
It has an appearance as shown in FIG. That is, the lower cassette case 10 and the upper cassette case 1
As shown in FIG. 13A, on the front surface of the cassette case main body 320, the tape 2 is led out from the tape outlet 158 and introduced into the other tape outlet 158.
22 is exposed. This tape 222 is located on the back side of the guard panel 322 because the guard panel 322 is in the closed state and covers the front side of the cassette case body 320. The guard panel 322 covers the tape 222 to prevent the tape 222 from coming into contact with anything else, and also covers the tape outlet/outlet ports 158 , 158 . Therefore, the tape inlet/outlet ports 158, 158 are relatively well shielded from light.

When the cassette is not in use, most of the tape 222 is rewound and wound onto one reel (the right reel in this embodiment), and a leader tape 228 and a magnetic tape 226 are located on the outer periphery of the reel. . For this reason, the tape outlet/outlet 158, 158
Substantially no light enters through the tape, but even if a small amount of light enters, it will not affect the inner circumferential side of the sensitive material tape 224.

The guard panel 322, which is in the closed state as described above and covers the front surface of the cassette case body 320, is rotated and biased by the torsion coil spring 344 to maintain that state, but it resists the biasing force. A lock plate 292 is used to prevent the guard panel from being opened. . The lock plate 292 is rotatably biased by the leaf spring piece 298 and locks the locking block 3 of the guard panel locking piece 296.
00 protrudes from the opening 90 and engages with a recess 338 formed on the inner surface of the left side wall 326 of the guard panel 322 to prevent rotation of the guard panel 322. In addition, guard panel locking piece 29
The tip of the unlocking block 302 of No. 6 protrudes from the notch 92 and is exposed to the outside of the cassette case body 320.

The reels 180, 180 have respective convex portions 216 of the contact piece fittings 212, 212, which are integrated with each other, pressed against the bottom plate 12 of the lower cassette case 10 by being biased by reel pressing springs 304, 310. The reels 180, 180 close the through holes 46, 46 formed in the bottom plate 12, and as described above, are separated from the inside and outside of the cassette case by the triple partition wall consisting of the annular projections 48, 196, 50. Even if the reels 180, 180 float, dust and light are substantially prevented from entering.

The brake levers 262 and 274 are biased to rotate by torsion coil springs 276 and 276, and the pawl portions 27
0,270 are the teeth 186 and teeth 1 formed around the outer periphery of each flange 182 of the reels 180, 180.
It is located between 86 and 86. Therefore reel 18
0,180 rotation is prevented and the tape 222
loosening is prevented. Release piece 2
78 is located above the through hole 66 formed in the bottom plate 12 of the lower cassette case 10 and closes the through hole 66. Therefore, dust and light are prevented from entering through the through hole 66.

When the cassette is in use, the cassette is loaded into the device. As shown in FIG. 16, the cassette holder 348 disposed in the apparatus is moved upward by the elevating mechanism 350 when an eject button (not shown) is operated. The cassette is inserted into the cassette holder 348 in the direction of arrow A in FIG. 16 with the guard panel 322 at the leading end. When the tip of the cassette is located approximately at the center of the cassette holder 348, it begins to come into contact with the contact spring 354. The contact spring 354 starts at the bent end and ends at the guard panel 322.
It rides on one of the two protrusions 340 formed in the ridge, and then immediately rides on the other protrusion 340. The contact spring 354 is in the position shown by the chain line in FIG. 16B before coming into contact with the guard panel 322, but upon contact, it is elastically deformed as shown by the solid line in FIG. 16B.

When the cassette is further inserted, the contact spring 354
is from the convex portions 340, 340 to the upper cassette case 10.
4 onto two convex portions 176, 176 formed in 4. Furthermore, the contact spring 352 also rides on the convex parts 340, 340 in the same manner as described above, and then the convex part 1
Transfer to 76,176. When the cassette reaches the insertion end, the front wall of the lower cassette case 10 comes into contact with the stoppers 360, 362 formed in the cassette holder 348, facing the notches 346B, 346D formed in the guard panel 322.

At the insertion end of the cassette, the contact spring 35
The tip bent portion of 2,354 is a convex portion 176,176
are located in the recesses 178, 178 formed in the middle of the insertion direction, respectively.
Contact fittings 316, 316 located between 78
It is in pressure contact with the Further, at the insertion end, the pressing block 356 presses into contact with the unlocking block 302 of the lock plate 292, causing the guard panel locking piece 296 to rotate against the biasing force of the leaf spring 298. This guard panel locking piece 2
96 causes the locking block 300 to close the opening 90.
The guard panel 322 is unlocked by retreating inward. Note that the pressing block 356 is pressed against the left side wall of the cassette case body 320 until the cassette reaches the insertion end, and the leaf spring 358 is bent and retracted into the opening.

Once the cassette has been inserted into the cassette holder 348, the cassette holder is manually or automatically pushed into position within the apparatus. During this operation, the notch 346A formed in the guard panel 322 comes into contact with a lid opening mechanism (not shown) provided in the device, and the guard panel is gradually opened against the biasing force of the torsion coil spring 344. , fully opened at the push-in end.

In addition, during the pushing operation of the cassette holder 348, near the pushing end, a brake release pin (not shown) provided on the device releases the lower cassette case 1.
It starts to enter the through hole 66 formed in the bottom plate 12 of No. 0, and gradually moves deeper as the pushing operation is performed. Above the through hole 66 is a release piece 27.
8 is located, and the brake release pin contacts and presses the inclined surface 286A of the release piece 278. The release piece 278 is pressed by the brake release pin, but the release piece 278 is pressed against the guide wall 1 formed on the upper cassette case 104.
Sliding contact portions 290, 290 abut against 62, 162 to prevent upward movement.

Therefore, the release piece 278 is moved against the guide wall 16 by the horizontal component of the pressing force from the brake release pin.
2,162 while being moved. During this movement, the release piece 278 moves along the guide wall 164,...
164, and are restricted from moving in the lateral direction. At the push-in end, the brake release pin is the release piece 278
It is located within a recess 288 formed inwardly. Since the release piece 278 is moved with the through hole 66 closed, dust and light are prevented from entering through the through hole 66.

As the release piece 278 moves, the brake levers 262 and 274 have their respective release piece contact portions 272 pressed against the brake lever contact portions 284 and 284 of the release piece 278, resisting the biasing force of the torsion coil springs 276 and 276. The claws 270 are rotated by the reels 180 and 1.
Evacuate from 80. This allows reel 180,1
80 is free to rotate when the brake is released.

The reels 180, 180 are connected to the cassette holder 348
At the push-in end, the reel is mounted on a reel stand 376 disposed in the apparatus as shown in FIG. A plurality of engagement pieces 380 are located between adjacent protrusions 200, 200. In this state, the reel stand 376
is not pushing the reels 180, 180 upward.

At the pushing end, the cassette holder 348
It is locked and maintained in the pushed-in state by a locking mechanism (not shown) provided in the device.

When the reel stand 376 is driven and rotated, one reel 180 of the cassette is rotated, and the other reel 180 is pulled by the tape 222 and rotates as a result. The conductive layer of the sensitive tape 224 is electrically connected to the contact piece fitting 212 disposed on the reel 180 via the conductive adhesive tape 232, and the contact piece fitting 21
2 is electrically connected to a reel presser spring 310 through a convex portion 216, and the reel presser spring 310 is connected to a contact spring 3 disposed in the device via a contact fitting 316.
52, 354 and is grounded to the device. Therefore, the sensitive material tape 224 is attached to the reel 18.
It is always grounded regardless of whether the 0 is stopped or rotating.

When the cassette is finished being used, it is removed from the device and stored. When the use of the cassette is completed, an eject button (not shown) provided on the device is operated, and the cassette holder 348 is extended to the top of the device. In this state, the guard panel 322 is released from contact with the lid opening mechanism (not shown).
It is biased by a torsion coil spring 344 to be in a closed state. Further, since the release piece 278 is released from contact with a brake release pin (not shown), the brake levers 262, 274 are released from the torsion coil spring 27.
6,276 and rotates. Release piece 2 is released by rotating the brake levers 262 and 274.
78, the brake lever contact portions 284, 284 are the release piece contact portions 272, 2 of the brake lever.
72 and slides to the starting position. At the same time, the brake levers 262, 274 have pawls 270,
270 is the flange 18 of the reel 180, 180
Teeth 186 formed on the outer periphery of 2,182, respectively.
and adjacent teeth 186 to prevent rotation of the reels 180, 180.

The cassette is then pulled out from the cassette holder 348 and stored. When the cassette is pulled out, the locking release block 302 of the lock plate 292 is released from the pressure by the pressing block 358, and the guard panel locking piece 296 is moved to the plate spring piece 298.
It rotates when it is biased by. Guard panel locking piece 29
6, the locking block 300 protrudes from the opening 90 and engages with the recess 338 of the guard panel 322, thereby locking the guard panel 322.

Note that the use of the claw piece 96 formed in the independent chamber 42 is not particularly limited in this embodiment;
By separating 6 from the lower cassette case 10,
Since the claw piece 96 no longer exists, it can be applied to various applications if the device can detect its presence or absence.

(Effects of Example) As described above, the electrophotographic film cassette of this example has the following effects.

Since the lower cassette case and the upper cassette case are jointed with a spigot joint, light does not enter into the cassette case body from the joint between the two cases, and light is completely blocked.

A partition wall is located between the left and right guide roller storage chambers and the left and right reel storage chambers, so even if light enters through the tape lead-in/outlet that is not completely shielded, there will be virtually no light entering the left and right reel storage chambers. does not reach.

The torsion coil spring that biases the guard panel to rotate is disposed on the outside of the shaft support hole of the cassette case body that pivotally supports the protrusion of the guard panel.
The guard panel can be attached and removed even when the lower cassette case and the upper cassette case are joined.

The lock plate that locks the guard panel is
Since the leaf spring part and the locking part are integrally molded, the number of parts is reduced, assembly is easy, and the total cost is reduced.

Since the upper cassette case has a guide rail protruding from a portion that slides into contact with a contact spring disposed on the cassette holder of the device, the cassette case will not be scratched. In addition, the recesses of the guide rails that are provided to sandwich the external contacts are misaligned on the left and right with respect to the center line in the cassette insertion direction, and one contact spring cannot enter each recess of the two parallel guide rails at the same time. Also, since they do not separate at the same time, the movement of the contact spring is smooth. Furthermore, since two contact springs are provided and two external contacts are also provided, even if a conduction failure occurs in either one, grounding can be ensured.

The hub part and flange part of the guard roller are manufactured separately and assembled into one piece, so there is no mold parting line formed during integral molding, and a highly precise and highly smooth roller surface can be obtained. It will be done. Further, the flange portion and the hub portion can be easily assembled with one touch without the need for adhesive or the like. Furthermore, the flange portion and the hub portion can be obtained as integrally molded products, so the cost is low.

In the reel, the annular protrusion formed on the back surface of the flange is located between the double annular protrusions formed on the inner surface of the lower cassette case. It is virtually shut off from the outside and prevents dust and light from entering. Also, even when the reel is mounted on the reel stand,
Since the reel is not separated from the cassette case unlike a conventional video cassette, play of the reel within the cassette case can be set to be small, and the thickness of the cassette can be made thinner than the tape width.

The release piece is designed to reciprocate in a straight line, and can give displacement to the brake lever while the through hole for inserting the brake release pin is closed, thereby preventing dust and light from entering through the through hole. be done.

Since the reel is provided with a grounding piece, the conductive layer of the electrophotographic film can be grounded through the reel. The grounding contact piece has a leaf spring shape at the contact part with the clamp, and the electrophotographic film is pressed between this leaf spring-like part and the clamp, so that the contact between the electrophotographic film and the grounding contact piece is The electrical connection is reliable, and the electrophotographic film has a strong locking force on the reel. A notch is formed in the leaf spring-like part of the grounding contact piece, and the bent plate part formed in the clamp enters this notch by pushing the electrophotographic film, thereby making the above-mentioned electrical connection. and the locking force is further increased.

The conductive layer of the electrophotographic film, which is electrically led to the reel by the grounding contact piece, is electrically led to the external contact via the reel spring that presses the reel against the cassette case. No other parts are required to electrically connect the piece and the external contact, and the electrical connection between the two is ensured whether the reel is rotating or stopped.

In the above embodiment, the reel 180 stored in the left reel storage chamber 30 is transferred to the right reel storage chamber 32.
The reel 180 has the same structure as the reel 180 accommodated in the reel 180, and includes a metal fitting 212. This is because parts are shared in order to reduce the number of parts, and it goes without saying that the reel accommodated in the left reel storage chamber may be a reel without a grounding function.

FIG. 17 shows another embodiment of the present invention, in which a pair of reels can be pressed and biased by a single reel pressing spring. The reel presser spring 366 shown in FIG. 17A is drawn at the center to form a protrusion 368, which serves as an external contact. Although not shown in the drawings, the reel presser spring 366 has a projection 368 fitted into a through hole formed approximately in the center of the upper cassette case, so that the projection 368 is exposed on the outer surface of the cassette case.

Further, after the hole 370 is fitted into the four short protrusions formed on the inner surface of the upper cassette case around the through hole, the tips of the short protrusions are caulked with heat to fix the reel pressing spring to the cassette case. It's getting old. The reel (not shown) has a reel pressing spring 366.
It comes into contact with both ends in the longitudinal direction and is pressed and biased. In this reel pressing spring 366, the number of parts for the reel pressing spring is only one, and furthermore, the external contacts are also press-molded, which is effective in reducing the number of parts.

The reel presser spring 372 shown in FIG. 17B has an opening formed in the center, and a contact metal fitting that is an external contact in which a large-diameter upper cylindrical portion and a narrow-diameter lower cylindrical portion are integrally molded. The lower cylindrical portion of 374 is fitted, and after fitting, the tip of the narrow diameter portion is caulked and integrated with the reel pressing spring as shown in FIG. 17C. This reel pressing spring 372 is connected to the contact fitting 37
The shape of the other parts except for the attachment part 4 is the same as that of the reel presser spring 366.

In addition, in the reel pressing springs of the embodiments shown in FIGS. 1 to 15 and the embodiment shown in FIG. Although the example shown is a fixed or molded reel spring,
The external contact may be separated from the reel pressing spring, and in this case, the two may be electrically connected by appropriate means. In this case, the arrangement position of the external contact can be arbitrarily selected, thereby increasing the degree of freedom in designing the device into which the cassette is loaded.

Further, in the above embodiment, the present invention is applied to an electrophotographic film cassette, but it can be applied to any cassette containing a reel on which a tape-like material that requires grounding is wound.

[Effects of the invention] As explained above, the cassette according to the invention has the following effects:
By using a leaf spring that presses the reel in the axial direction, it is possible to electrically connect the tape-shaped body that requires grounding to the external contact placed on the outer surface of the cassette case. Therefore, since the leaf spring is supported by the cassette case, the tape-like body and the external contact can be electrically connected reliably with a small number of structural members, which is an advantage.
have an effect.

[Brief explanation of the drawing]

1 to 15 show an electrophotographic film cassette according to an embodiment of the present invention, FIG. 1 is an exploded perspective view of the whole, FIG. 2 is an inner view of the lower cassette case, and FIG. 3 is an upper cassette case. Fig. 4A is an exploded perspective view of the reel, Fig. 4B is a perspective view of the reel seen from the back, Fig. 4C is an enlarged perspective view of the clamp, and Fig. 5 is a partially enlarged plan view of the reel. Figure 6 is a sectional view taken along the - line in Figure 5, Figure 7 is a plan view of the lower cassette case with each part assembled, and Figure 8 is a view taken along the - line in Figure 7. A corresponding sectional view, FIG. 9A is an exploded perspective view of the guide roller,
FIG. 9B is a plan view of the guide roller hub member;
Figure C is a sectional view taken along line C-C in Figure 9B,
0 is a perspective view of the brake lever, FIG. 11A is a partially cutaway perspective view of the release piece, FIG. 11B is a sectional view of the same, and FIG. 11C is a perspective view showing another embodiment of the release piece. Figure 12 is a side view of the lock plate, Figure 13A is a perspective view of the cassette case body and guard panel before assembly, Figure 13B is a view taken from arrow B in Figure 13A, and Figure 14 is the guard panel. FIG. 15 is a perspective view after the guard panel is assembled to the cassette case body, and FIG. 16A is a cassette holder portion of a device into which an electrophotographic film cassette according to an embodiment of the present invention is loaded. FIG. 16B is a cross-sectional view, FIG. 17 is another embodiment of the present invention, A and B are perspective views of the reel spring, and C is a cross-sectional view of B.
It is a sectional view taken along the XC line. 180... Reel, 212... Contact piece metal fitting, 22
2... Tape, 304... Press the reel, 31
6...Contact fittings (external contacts), 320...Cassette case body, 366, 372...Reel pressing springs, 368...Protrusions (external contacts), 374...Contact fittings (external contacts).

Claims (1)

[Scope of utility model registration request] A cassette in which an external contact is disposed on the outer surface of the cassette case, and a tape-like material that requires grounding is wound around a reel and housed inside the cassette case. A cassette characterized in that a leaf spring that presses and biases the reel in the axial direction is supported by a cassette case, and the tape-shaped body and an external contact are electrically connected via the leaf spring.