JPH1173745A - Guide rail and forming method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the cost with reduction of the number of components, or the like, and to improve the positional accuracy by providing a base formed integrally with a base part at the opening edge of an opening part which is formed on the base part of an object to be worked consisting of a sheet metal material, and a bent part formed integrally with the base at a tip of the base while making a specified angle with the base. SOLUTION: In an auxiliary guide rail 233, the L-shaped bent part 233a making the base is formed and a bent piece 233b is formed by bending the tip part further downward, when the opening part is punched. When end surfaces of the upper/lower surfaces of the bent piece 233b are worked simultaneously to the projected circular-arcuate surfaces 233c, 233d, a recessed part 233e is formed by pressing downward from the part to the base side of the L-shaped bent part up to the part in contact with the bent piece 233b. Also, when the L-shaped bent part 233a is formed, each of projecting and recessing parts 233f is simultaneously formed as reinforcing rib, except the end part where the bent piece 233b is formed. Thus, a mechanical chassis and the guide rail are integrally formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a guide rail and a method for forming the same. More specifically, the present invention relates to a guide rail that is engaged with an engaging portion of a moving body to guide the moving body when the moving body moves, and a method of forming the guide rail, which reduces costs by reducing the number of parts and covers the guide rail. The present invention relates to a technique for improving the positional accuracy of a workpiece relative to a base.

[0002]

2. Description of the Related Art For example, there is an MD recording / reproducing apparatus for recording / reproducing a recording / reproducing medium for recording / reproducing or both of them, for example, an MD (mini disc). In such an MD recording / reproducing apparatus, an optical pickup for recording and reproduction is supported on a mechanical chassis having a mounting portion on which the MD is mounted so as to be movable in a radial direction of the MD mounted on the mounting portion.

The optical pickup is supported on the mechanical chassis by separately supporting a guide shaft (main shaft) and a guide rail (sub shaft) in a state of being parallel to a radial direction of the MD on a bearing provided on the mechanical chassis. The guide shaft and the guide rail are slidably engaged with guided portions and engagement portions formed at both ends of the moving base of the optical pickup.

[0004] When the mechanical chassis is formed of a sheet metal material, a conventional method of supporting the guide rail with respect to the mechanical chassis is performed by using a separately formed guide rail (or guide shaft) on the mechanical chassis by screwing. It is performed by attaching to the formed bearing part.

[0005]

However, in the above-mentioned conventional method of supporting a guide rail on a mechanical chassis formed of a sheet metal material, a guide rail must be formed separately from the mechanical chassis. There is also a problem that mounting screws for mounting to the device are required, and the number of parts increases.

In addition, since the mounting to the mechanical chassis is performed by screwing, if the mounting screws are loosened due to, for example, vibration during use of the apparatus, the guide rails are displaced from the mechanical chassis. In some cases, it is difficult to ensure good positional accuracy of the guide rail with respect to the mechanical chassis.

Further, it is necessary to perform an assembling step by screwing for supporting the guide rails on the mechanical chassis, and there is a problem that the work time is required accordingly.

Accordingly, the present invention is directed to a guide rail which overcomes the above-mentioned problems and which is engaged with a moving body, for example, an engaging portion of an optical pickup to guide the moving body when moving. It is an object of the present invention to reduce the cost by reducing the cost and improve the positional accuracy of the guide rail with respect to the base portion of the workpiece, for example, the main surface of the mechanical chassis of the recording / reproducing apparatus.

[0009]

The guide rail according to the present invention comprises:
In order to solve the above-mentioned problems, a base formed integrally with the base at an opening edge of an opening formed in a base of a workpiece made of a sheet metal material, and a predetermined angle with the base at a tip of the base. And a bent portion formed integrally with the base portion.

[0010] The method of forming a guide rail according to the present invention comprises:
A base processing step of forming a base integrally with the base at the opening edge of the opening formed in the base of the workpiece made of a sheet metal material, and a bent portion forming a predetermined angle with the base at the tip of the base. And a bending process for forming the base and the base integrally by bending.

Further, another guide rail according to the present invention is formed by bending a part of a bent edge formed on an outer edge of a base portion of a workpiece made of a sheet metal material and is positioned opposite to the base portion. And a bent portion formed at an end of the base portion at a predetermined angle with the base portion and integrally formed with the base portion.

In addition, another method of forming a guide rail according to the present invention is to form a bent portion by bending a front end of a bent edge formed on an outer edge of a base portion of a workpiece made of a sheet metal material by a predetermined angle. And a base processing step of bending a part of the bent edge to form a base located opposite to the base.

Therefore, in the guide rail and the method of forming the same according to the present invention, it is not necessary to form the guide rail separately from the workpiece and to support the guide rail on the base portion of the workpiece.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the illustrated embodiment, the present invention is applied to a portable MD (mini-disc) reproducing apparatus.

In this specification, a direction indicated by an arrow F in FIG. 1 is indicated by a front, a direction indicated by an arrow B is indicated by a rear, a direction indicated by an arrow U is indicated by an arrow, a direction indicated by an arrow D is indicated by a arrow, and an arrow L is indicated by an arrow L. The description is made on the assumption that the direction is left and the direction indicated by arrow R is right.

First, the appearance of the MD playback device 1 will be described.

The outer casing 2 has two upper and lower case bodies, that is, an upper case body 3 and a lower case body 4, and the upper and lower case bodies 4 and 4 are united vertically to form an outer casing main body having an open front end. The part 5 is formed. A front case body 6 is disposed at the front end of the outer casing main portion 5, and thereby, a substantially upper part 3 of the front surface is provided.
An outer casing 2 is formed in which the one-half part and the front end of the upper surface are open.

A cover 8 formed at the front end of the outer casing 2 and opening and closing the opening 7 serving as an MD insertion / removal opening is rotatably disposed. The cover body 8 is rotated between a closed position where the opening 7 is closed as shown in FIG. 1 and an open position where the opening 7 is opened as shown in FIG. . Further, as described later, the cover body 8 is elastically urged with a rotational force toward the closed position.

The front upper end face 9 of the front case body 6, that is, the lower opening edge of the opening 7 is a slope inclined forward and downward, and the lower end face 10 of the cover body 8 is raised forward. When the cover body 8 is in the closed position, the insertion concave portion 11 that is opened in a substantially V-shape toward the front side is formed.

The mounting of the MD (mini-disc) 12 is performed as follows.

After the insertion tip of the MD 12 is inserted into the insertion recess 11, the MD 12 is pushed in. Then, the pushing force pushes the inclined surface of the cover body 8, and a turning force is applied to the cover body 8 toward the open position, whereby the opening 7 is opened and the MD 12 is inserted as it is. . When the MD 12 is almost inserted, the MD 12 is automatically retracted thereafter, the cover body 8 moves to the closing position, and the MD 12 is mounted at a predetermined mounting position.

A main chassis (housing) 100 is provided in the outer housing 2.
Are arranged, and the mechanical chassis 2 is attached to the main chassis 100.
00 is floating supported.

The main chassis 100 is formed by bending a sheet metal material. The main chassis 100 has a top plate portion 110, a right side surface portion 120 extending from a right edge of the top plate portion 110, and a vertical edge portion extending from a left edge of the top plate portion 110. The left side part 130 is integrally formed (see FIG. 4). A substantially upper half of the front end of the right side part 120 and the left side part 130 and the front end of the top plate part 110 are cut out, and the front part 140 is bridged between the front ends of the right side part 120 and the left side part 130. Thus, an opening 111 that opens upward and forward is formed at the front end of the main chassis 100. Further, the top plate 11
0 has a notch 112 formed at the rear end of the right edge thereof, and the right side surface 120 is formed to a position corresponding to the front edge of the notch 112. Furthermore, a mounting piece 113 is vertically provided at the right end of the rear edge of the top plate 110.

Further, a support piece 114 is vertically provided at a position slightly shifted to the right from the center of the portion near the rear end of the top plate section 110, and a support hole 114a is formed in the support piece 114.

Support shafts 141, 141 projecting rearward are fixed at positions near the left and right ends of the front portion 140, and damper members 142, 142 made of an elastic material, for example, butyl rubber, are fixed to the support shafts 141, 141. It is attached in an external fitting shape. The damper member 142 includes a main portion 142a serving as a supported portion having an elongated conical outer shape and the main portion 142a.
A flange 142b projecting from the outer peripheral surface on the bottom side of the base 2a and functioning as an elastic contact portion is integrally formed, and has a hole 142c opened on the bottom surface.
41 is attached to the support shaft 141 in a state where it is lightly pressed (see FIG. 5).

The mechanical chassis 200 is also formed by bending a sheet metal material. Four edges of the main surface 210 are formed with bent edges 211, 211,. Then, the bent edges 211, 2 located on the front side
11 are located near the left and right side edges,
212 are formed. A support shaft 213 is provided to project rearward at a position slightly shifted rightward from the center of the rear bent edge 211.

A damper member 214 similar to the damper member 142 is externally fitted to the support shaft 213. The bumper member 214 is made of an elastic material such as butyl rubber, and has a slender conical outer shape as a supported portion 214a serving as a supported portion and a flange protruding from a bottom side outer peripheral surface of the main portion 214a to function as an elastic contact portion. Part 214b
Are formed integrally, and a hole 214c opened on the bottom surface
The support shaft 213 is attached to the support shaft 213 in a state where the support shaft 213 is lightly pressed into the hole 214c.

Thus, the main parts 142a, 142 of the damper members 142, 142 provided on the main chassis 100
2a is fitted into the support holes 212, 212 of the mechanical chassis 200 until the flange portions 142b, 142b abut against the bent edges 211, 211. Further, the main portion 214a of the damper member 214 provided in the mechanical chassis 200 is The flange portion 214b is fitted into the support hole 114a of the chassis 100 until the flange portion 214b comes into contact with the support piece 114.
The mechanical chassis 200 is floatingly supported by the main chassis 100 via three damper members 142, 142, 214. That is, the respective support shafts 141, 14
Vibration in the direction orthogonal to 1, 213
Main parts 142a, 142a, 214 of 2, 142, 214
a, and the vibrations in the directions in which the support shafts 141, 141, 213 extend are received by the flange portions 141b, 141b, 214b of the damper members 142, 142, 214. Difficult to reach 200.

A spindle motor 220 is provided at the center of the main surface portion 210 of the mechanical chassis 200, and a turntable 222 as a mounting portion of the MD 12 is attached to a rotating shaft 221 of the spindle motor 220 (FIG. 6). And FIG. 7).

At the left side of the central portion of the main surface portion 210 of the mechanical chassis 200, the optical pickup 230 is mounted on the turntable 222 in the left-right direction, ie, on the turntable 222.
It is supported movably in the radial direction of D12.

On the left side of the main surface 210 of the mechanical chassis 200 where the spindle motor 220 is disposed, a large rectangular opening 21 is provided between the center and the left edge.
5 is formed, and an optical pickup 230 as a moving body is disposed in the opening 215 so as to be movable in the left-right direction.

That is, the optical pickup 230 is supported by the movable base 231, and the movable base 231 is
32 and the auxiliary guide rail 233 so as to be movable in the left-right direction.

The guide shaft 232 is formed so as to extend along the rear edge of the opening 215.
Is slidably inserted into a guided portion 234 formed at the rear end of the movable base 231, whereby the rear end of the movable base 231 is slidably supported by the guide shaft 232.

The auxiliary guide rail 233 is connected to the opening 21.
5 is formed integrally with the mechanical chassis 200 at the front edge (see FIG. 8). That is, a portion having a crank-shaped cross section is formed in an opening 215 formed in a main surface portion 210 which is a base portion of a mechanical chassis 200 whose upper end is a workpiece.
The auxiliary guide rail 233 is formed by integrally forming the upper and lower end surfaces of the rear end portion of the crank-shaped portion so as to form a convex arc with a cross-sectional shape. ing.

The method of forming the auxiliary guide rail 233 will be described in detail with reference to FIGS.

First, when punching the opening 215,
An L-shaped portion 233a serving as a base is formed (see FIG. 9). Next, the distal end of the portion 233a is further bent downward to form a bent piece (bend) 233b (see FIG. 10). Finally, the upper and lower end surfaces 233c and 233d of the bent piece 233b are simultaneously processed to have a convex arc surface (see FIG. 11). At this time, the upper circular surface 2
The portion 233 is located above the portion adjacent to the arc surface 233c on the upper surface of the portion 233a.
a from the portion near the base of the horizontal portion
The portion 233e is pressed downward until a portion in contact with the portion b, whereby a concave portion is formed on the upper surface side of the portion 233e. Thus, the auxiliary guide rail 233 is formed, and such processing is performed by the mechanical chassis 20.
0 can be performed simultaneously in the process of press forming. In addition, in the portion 233a bent in an L-shape, reinforcing irregularities 233f, 233f,..., Which are reinforcing ribs, are formed in portions other than the ends where the bent pieces 233b are formed. Such reinforcement irregularities 233f, 233
are formed at the same time when the portion 233a bent in an L-shape is formed.

As shown in FIGS. 12 to 14, an auxiliary guide rail 240 different from the auxiliary guide rail 233 may be formed integrally with the mechanical chassis 200.

That is, first, when the opening 215 is punched, a portion 241 bent into an L-shape as a base is formed (see FIG. 12). Next, the tip of the portion 241 is folded from below to form a folded piece (bent portion) 242 (see FIG. 13). Then, the folded piece 242
And the portion 241 is pressed so as to be in close contact (FIG. 1
4), and the auxiliary guide rail 240 is formed. Such an auxiliary guide rail 240 can be formed simultaneously in the process of press-forming the mechanical chassis 200. Therefore, it is possible to reduce the number of parts and the number of assembly steps.

Further, as shown in FIGS. 15 to 19,
The auxiliary guide rail 233 and another form of the auxiliary guide rail 245 may be formed integrally with the mechanical chassis 200.

The auxiliary guide rail 245 is formed by processing the bent edge 211 bent downward from the front edge of the main surface 210 of the mechanical chassis 200.

That is, the auxiliary guide rail 245 is
11 is bent inward by 90 ° and is located at a position facing the main surface portion 210, and a bent portion 2 which is continuous with the leading end of the base 246 and is orthogonal to the base 246.
The bent portion 247 has upper and lower end surfaces each having a cross-sectional shape and a convex arc-shaped arc surface 247a, 247b.
(See FIG. 15).

The method of forming the auxiliary guide rail 245 will be described in detail with reference to FIGS.

First, when the mechanical chassis 200 is formed, the bent edge 21 bent from the front edge of the main surface portion 210 is formed.
1 is formed slightly longer in the vertical direction. Next, the bent edge 211
Is bent outward to form a bent piece 247 '(see FIG. 16). Then, the bent front and rear end faces of the bent piece 247 ′ are simultaneously processed into convex arc surfaces 247a and 247b to form a bent portion 247 (see FIG. 17). At this time, the portion 248b is pressed forward so that the rear-side arc surface 247a projects rearward from a portion 248b adjacent to the bent piece 247 'of the inner surface of the portion 248a extending in the vertical direction of the bent edge 211. As a result, a recess is formed on the rear surface side of the portion 248b. In this press working, the arc surface 24 is larger than the inner surface of the portion 248c of the bent edge 211 where the concave portion is not formed.
7a is formed so as not to protrude rearward (FIG. 17 shows the positional relationship between the respective surfaces by dashed lines).

Next, the portion from the middle portion of the portion 248c to the tip side is bent inward. This bending is performed using a jig 249 (see FIG. 18). The jig 249 is formed so as to extend in the horizontal direction.
a is formed to be slightly thicker than the other portion 249b.

The tip 249a of the jig 249 is
0 and pressed against the part of the portion 248c of the bent edge 211, and the bent edge 211 is
9 is bent inward until a portion not pressed against 9 contacts jig 249. By bending in this manner, the main surface portion 210 and the portion 248 located opposite to the main surface portion 210
18 (the distance A shown in FIG. 18) is equal to the thickness of the distal end portion 249 a of the jig 249, and the base other than the bent portion 247 of the bent portion faces the main surface portion 210. 246.

Finally, the jig 249 is pulled out rearward to complete the processing (see FIG. 19), and the auxiliary guide rail 245 is formed. In addition, as described above, the bent portion 24
7 at the time of press working to form
8a, the arc surface 247a is formed so as not to protrude backward from the inner surface of the portion 248c in which the concave portion is not formed, so that the bent edge 211 is partially bent to form the base 246. The distance A (see FIG. 18) between the main surface 210 and the portion 248c of the base 246 is equal to or smaller than the distance (the distance B shown in FIG. 18) between the main surface 210 and the arc surface 247a of the bent portion 247. Have been.

Therefore, when the jig 249 is pulled backward, the tip 249a of the jig 249 does not interfere with the arc surface 247a formed to protrude upward, which hinders the formation of the auxiliary guide rail 245. There is no such thing.

The auxiliary guide rail 245 is formed by processing the bent edge 211 of the mechanical chassis 200 to form the bent portion 2.
47 is formed so as to have arc surfaces 247a and 247b. As an auxiliary guide rail formed by processing the bent edge 211, for example, although not shown, FIG.
4, a base part facing the main surface part 210 formed by bending a part of the bent edge 211, and a folded piece formed by folding the tip part of the base part. The auxiliary guide rail having the following configuration can also be formed.

Thus, the auxiliary guide rails are
1 is formed by machining, the MD 12 mounted on the turntable 222 provided in the mechanical chassis 200 is smaller than the case where the auxiliary guide rail is formed at the edge of the opening 215 of the mechanical chassis 200. The mechanical chassis 200 is provided within a range in which it can rotate without contacting each member inside the mechanical chassis 200.
And the size of the MD reproducing apparatus 1 can be reduced.

Also, for example, in the type in which the MD reproducing apparatus can perform both recording and reproduction, the moving base is set to be smaller than the reproducing base due to the elements mounted on the moving base of the optical pickup. Although it is necessary to increase the size, the auxiliary guide rail is formed on the outer edge of the mechanical chassis 200 by processing the bent edge 211 so that the size of the mechanical chassis 200 can be changed even when the moving base becomes large. Therefore, the moving base can be supported without any problem, and the MD reproducing apparatus does not become large due to the large moving base.

The moving base 23 of the optical pickup 230
Guide pieces 235 and 235 are provided at the front end of the guide piece 235, which are vertically spaced apart from each other, and project forward in parallel and engage with the auxiliary guide rail 233.
5 and 235 are upper and lower surfaces 2 of the auxiliary guide rail 233.
33c, 233d, that is, abut against the sliding surface separately (see FIG. 8). As described above, the optical pickup 2
30 is supported by the guide shaft 232 and the auxiliary guide rail 233 so as to be movable in the left-right direction in the opening 215.

The optical pickup 230 is moved in the left-right direction by the pickup feeding mechanism 250 (see FIGS. 6, 7 and 20).

The pickup feed mechanism 250 includes a motor 25
1, a feed screw 253 rotated by the motor 251 via a gear train 252, and a nut member 254 supported by the moving base 231 of the optical pickup 230 and engaged with the feed screw 253.

The feed screw 253 has two bearing portions 255.
And 256, the main surface portion 210 of the mechanical chassis 200
Is rotatably supported at a position extending along the rear edge of the opening 215 on the lower surface of the opening 215.

The two bearings 255 and 256 are both formed integrally with the mechanical chassis 200.

The bearing 255 is formed integrally with the mechanical chassis 200 as follows (see FIGS. 21 to 23).

First, two parallel slits 255a and 255a are formed in a sheet metal material (material of the mechanical chassis 200) (see FIG. 21). Next, the slits 255a, 25
The portion excluding the end of the portion (inter-slit portion) 255b located between the portions 5a is divided into several parts and squeezed to form a substantially U-shape (see FIG. 22). In parallel with this drawing, the central part of the position adjacent to one of the slits 255a is U
The receiving portion 255c is formed as a protruding portion by projecting to the side where the character-shaped portion 255b protrudes (see FIG. 23). In this way, the bearing part 255 is formed, the left end of the U-shaped part 255b of the feed screw 253 is inserted, and the part immediately to the right of the part inserted into the U-shaped part 255b is It is received by the receiving unit 255c.

The bearing portion 256 is formed integrally with the mechanical chassis 200 as follows (FIGS. 24 to 26).
reference).

Also in this case, first, two parallel slits 256a, 2a are formed in a sheet metal material (material of the mechanical chassis 200).
56a are formed (see FIG. 24). Next, a part (inter-slit part) 256b located between the slits 256a and 256a is divided into several parts and squeezed to form a wide, substantially U-shaped part (see FIG. 25). Then, a portion excluding both ends is formed into a semicircular shape while being drawn toward the main surface portion 210 to form a receiving portion 256c, and a bearing portion 256 is formed (see FIG. 26). Then, the feed screw 253 is attached to the receiving portion 256c.
The part near the right end of is supported.

The above-mentioned bearings 255 and 256 can be formed simultaneously by press working when forming the mechanical chassis 200. Therefore, the number of parts and the number of assembly steps can be reduced.

The nut member 254 is made of a leaf spring material and has a resilient contact piece 254a. The resilient contact piece 254a is formed with an engagement protrusion 254b in a punched shape (see FIG. 20). Such a nut member 254 is connected to the moving base 23.
The elastic contact piece 254a is fixed to the lower surface of the rear end portion of the first screw so as to protrude rearward, and the engaging projection 254b of the elastic contact piece 254a elastically engages with the screw 253a of the feed screw 253 from below.

A preload spring 257 made of a leaf spring material is fixed to the mechanical chassis 200 (see FIG. 20). The preload spring 257 is formed with a preload portion 257a for resiliently pressing the feed screw 253 in the thrust direction and a pressing portion 257b for resiliently pressing the feed screw 253 against the main surface 210 of the mechanical chassis 200. And the preload spring 257
The leading end of the preload portion 257a is elastically contacted with the right end of the feed screw 253, thereby preventing the feed screw 253 from rattling in the thrust direction. The left end of the feed screw 253 is a bent edge 21 which is a left side surface of the mechanical chassis 200.
The bent edge 211 functions as a thrust receiver.

The pressing portion 257 b of the preload spring 257 is elastically contacted with a portion adjacent to the right end of the feed screw 253 so as to press it toward the main surface portion 210 of the mechanical chassis 200. Only the upper portion of the portion near the right end is received by the bearing portion 256, so that rattling is prevented.

The MD 12 is mounted on the mechanical chassis 200.
Media holder 3 that functions as a holder for holding
00 is vertically movably supported (see FIGS. 27 and 28).

A fulcrum lever 310 is interposed between the rear end of the media holder 300 and the rear end of the mechanical chassis 200 (see FIGS. 6, 7, and 27 to 30). The fulcrum lever 310 is made of a sheet metal material, and extends in the left-right direction and is formed as a side surface portion.
And 2. The distal ends of the arm pieces 312, 312 are rotatably connected to the rear end of the mechanical chassis 200. A sliding shaft (second sliding shaft) 313 protrudes from the rear end of the left arm piece 312.

The media holder 300 is made of a sheet metal material, and includes a top plate portion 301, side plate portions 302, 302 projecting downward from right and left side edges of the top plate portion 301 and formed as side portions, and these side plate portions 302. , 302, supporting pieces 303, 30 projecting toward each other
3 (see FIGS. 27 to 30). From the rear ends of the side plates 302, 302 of the media holder 300, connecting leg pieces 304, 304 are vertically suspended.
04 and 304 are the arm pieces 31 of the fulcrum lever 310
2, 312 are rotatably connected to the base end, that is, the end on the connecting portion 311 side. In addition, this media holder 3
The pivot axis for the fulcrum lever 310 is the fulcrum lever 3
10 is the same as the axis of the sliding shaft 313 provided in FIG.

The right support piece 3 of the media holder 300
A part near the front end of 03 is cut and raised downward to form a spring hook 305 serving as a second elastic body support piece for supporting one end of a toggle spring described later.

A sliding shaft (first sliding shaft) 306 is projected from an outer surface of a substantially middle portion of the left side plate portion 302 of the media holder 300 in the front-rear direction.

The above-described media holder 300 is moved up and down with respect to the mechanical chassis 200 by a slider 320 which is a linear moving body that moves in the front-back direction (FIG. 2).
7 and FIG. 28).

The slider 320 is formed of a sheet metal material.
The left side bent edge 211 of the mechanical chassis 200 is slidably supported in the front-rear direction, and is stretched between a spring hook piece 321 formed on the slider 320 and a spring hook piece 211a formed on the bent edge 211. A moving force toward the front is urged by the provided tension coil spring 322.

The slider 320 is provided with cam slits 323 and 324 which are separated from each other in the front and rear directions. The front cam slit (first slit) 323 includes a substantially horizontal portion 323a on the front side and an inclined portion 323b continuous with the rear end of the horizontal portion 323a and extending downward and obliquely rearward therefrom. Cam slit (second slit) 32
Reference numeral 4 denotes a front horizontal portion 324a extending substantially horizontally on the front side and a rear end of the front horizontal portion 324b, and an inclined portion 324b extending downward and obliquely backward therefrom, and a rear end of the inclined portion 324b continuing from the rear. Rear horizontal portion 324 extending horizontally
c.

A slide shaft 313 provided on the fulcrum lever 310 is slidably engaged with the rear cam slit 324, and a slide shaft 306 provided on the media holder 300 is connected to the front cam slit 324. It is slidably engaged with the slit 323.

Therefore, the media holder 300 is moved up and down with respect to the mechanical chassis 200 by sliding the slider 320 in the front-back direction.

That is, in a state where the slider 320 is at the front end of the moving range, the sliding shaft 313 is located at the rear horizontal portion 324c, and the sliding shaft 306 is located at the rear end of the inclined portion 323b. The media holder 300 is in a lowered state, that is, a state closest to the main surface 210 of the mechanical chassis 200 (see FIG. 27). The state where the media holder 300 holds the MD 12 and is in this state is a loading state (the position of the media holder 300 in this state is referred to as a “loading position”).

When the slider 320 moves backward from this state, the sliding shafts 313 and 306 move relatively upward on the inclined portions 324b and 323b, respectively.
When the slider 320 reaches the rear end of the movement range, the sliding shaft 313 moves to the front horizontal portion, and the sliding shaft 306 moves to the horizontal portion 3.
23a, the media holder 300 is in the highest position, that is, the main surface 2 of the mechanical chassis 200.
It is in the state most distant from 10 (see FIG. 28). This state is a standby state (when the MD 12 is not held) or an unloading state (when the MD 12 is held) (the media holder 300 in this state).
Position is "standby position" or "unloading position"
Say ).

As described above, the media holder 300
Is connected to the mechanical chassis 200 by the fulcrum lever 310, so that the sliding shafts 306, 313 are only engaged with the cam slits 323, 324 (they are engaged with the slits extending in the vertical direction to suppress the forward and backward movements). It is not necessary to perform the movement.) It is possible to move only in almost the vertical direction and to reduce the size in the front-rear direction.

As described above, by moving the media holder 300 vertically only on one side (left side), the dimension in the width direction can be reduced.

As described above, the media holder 300
Is at the left side at two points via a fulcrum lever 310 and a slider 320, and at the right end at one point at the fulcrum lever 31.
This is a structure supported by the mechanical chassis 200 via the “0”.

Then, another point on the right side of the media holder 300 is supported by the mechanical chassis 200 via the toggle spring 330 (see FIGS. 29 and 30).

A spring hook 216, which is a first elastic support piece for supporting the other end of a toggle spring described later, at a position slightly forward from the center in the front-rear direction near the right edge of the main surface portion 210 of the mechanical chassis 200. Are protruded downward, and a spring hook hole (first support portion) 216a, which is a support portion of a toggle spring that is long in the front-rear direction, is provided in each of the spring hook piece 216 and the spring hook piece 305 of the media holder 300.
A spring hook hole (second support portion) 305a is formed.

The toggle spring 330 has a coil part 331 and two arm pieces 332, 333, and a locking part 334, 334 is formed at the tip of each arm piece 332, 333. Then, one arm piece 332 is formed in an L shape.

The locking portion 334 of the one arm 332 of the toggle spring 330 is connected to the spring hook 30 of the media holder 300.
5, and the locking portion 334 of the other arm 333 is locked in the spring hooking hole 216a of the spring hook 216 of the mechanical chassis 200.

When the media holder 300 is in the standby state or the unloading state, as shown in FIG. 29, the spring hook hole 305a is inserted into the spring hook hole 216a.
In the upper position, the locking portion 334 of the arm piece 332 is located at the front end of the spring hook hole 305a.
34 is located at the rear end of the spring hook hole 216a. In this state, the elastic force of the toggle spring 330 is
Acts to lift 0 upward.

When the media holder 300 descends from the state shown in FIG. 29 and the position of the spring hook hole 305a is lower than the spring hook hole 216a, the elastic force of the toggle spring 330 causes the media holder 300 to move mechanically. It acts so as to press against the main surface 210 of the chassis 200 (see FIG. 30).

As described above, the media holder 300
If the right side is supported by only one point at the rear end, the position of the forward portion becomes unstable, but this portion is supported by the toggle spring 330 as described above, When the media holder 300 is in the standby state or the unloading state by using the change of the direction in which the force acts, the media holder 300 is operated to maintain a predetermined height, while the media holder 300 is operated.
When 0 is in the loading state, the media holder 300 is made to act so as to press against the main surface portion 210 of the mechanical chassis 200, so that the state of each position of the media holder 300 can be stabilized.

Next, the MD 12 is mounted on the media holder 300.
The mechanism for lowering the media holder 300 when it is inserted into the
The mechanism for projecting 12 from the media holder 300 will be described (see FIGS. 6, 7, 31 to 36).

The eject lever 34, which is a rotating body, is provided on the left side of the rear end of the main surface 210 of the mechanical chassis 200.
0 is rotatably supported (see FIGS. 6, 31 and 3).
2). The eject lever 340 is formed by processing a sheet metal material and integrally forming an arm portion 341 and a controlled portion 342. The arm portion 341 extends substantially rightward from the right end of the controlled portion 342, and has a contact portion 341a that is curved forward and convex at the tip end. And this contact part 34
1a has its upper end protruding above the other part of the arm 341 and its upper end located in a notch 301a formed in the rear edge of the top plate 301 of the media holder 300 in the loading state. And the media holder 3 in the standby state or the unloading state.
The support pieces 303 are located above the support pieces 303 (see FIG. 31).

The base 341b of the arm 341 is projected downward, and the lower end thereof is connected to the right end of the controlled part 342. The arm 341 of the eject lever 340 has a mechanical chassis 200.
The controlled portion 342 is located above the main surface portion 210 and below the main surface portion 210.

The controlled portion 342 is substantially L-shaped when viewed from above, and the L-shaped bent portion is attached to the main surface portion 210 by the shaft 342a in a state of being located on the lower surface side of the main surface portion 210 of the mechanical chassis 200. It is rotatably supported (FIG. 33
To FIG. 36). A spring hooking piece 343 is vertically provided at an inner bending point of the L-shaped portion of the controlled part 342, and the spring hooking piece 343 and the spring hooking piece 217 vertically provided on the main surface 210 of the mechanical chassis 200. Tension coil spring 3 between
44, the ejection lever 34 is
At 0, a turning force in a counterclockwise direction as viewed from above is urged.

The rear edge 345 of the portion extending substantially rearward of the controlled portion 342 is a gentle arc-shaped stopper edge (stopper portion), and the right edge 3 of the rearward extending portion is formed.
46 extends substantially in the front-rear direction. A pressed piece (pressed section) 347 is vertically provided along the left edge of the controlled section 342. The pressed piece 347 includes a rear half 347a and a front half 34.
7b are continuously formed, and the arm portion 341 is formed.
Is formed so that the front half 347b extends substantially straight in the front-rear direction, and the rear half 347a extends slightly rearward from the rear end of the front half 347b. I have.

At the lower edge of the rear end of the slider 320, a support plate 325 which projects rightward and is formed as a support portion is integrally formed (see FIGS. 33 to 36). The support plate 325 is connected to the controlled portion 342 of the eject lever 340.
It is located below.

At the right end of the rear edge of the support plate 325, a stopper piece (stopper portion) 326 is provided to protrude upward. Then, the left end 327 of the stopper piece 326 is formed.
Is bent at right angles toward the rear. A collar 328 is rotatably supported on the upper surface of the stopper piece 326 at a position slightly leftward from the left end.

When the slider 320 is located at the rear end of the moving range, that is, when the media holder 300 is in the standby state or the unloading state, the eject lever 340 is moved to the most counterclockwise rotated position. The stopper piece 32 of the slider 320
6 comes into contact with the stopper edge 345 of the eject lever 340 from the front, and the slider 320 is locked at a position located at the rear end of the movement range (see FIG. 33).

Therefore, the MD is placed in the media holder 300.
When 12 is inserted, the abutting portion 341a of the eject lever 340 is pushed rearward by its tip, whereby the eject lever 340 is rotated clockwise when viewed from above. Eject lever 34
0 is rotated clockwise, the stopper edge 34
5 moves almost to the left, and eventually the right end of the stopper edge 345 becomes the stoppered piece 32 of the slider 320.
6 comes to a position corresponding to the left end 327 (see FIG. 34).
At this time, the collar 328 of the slider 320 is located at a position slightly opposite to the right side of the rear half 347a of the pressed piece of the eject lever 340 (see FIG. 34).

The right end of the stopper edge 345 of the eject lever 340 is connected to the stopper piece 3 of the slider 320.
When the slider 26 moves to the left from the left end 327 of the slider 26, the slider 32
0 moves forward by the tensile force of the extension coil spring 322, and its collar 328 is moved by the eject lever 340.
Abuts against the right side surface of the rear half 347a of the pressed piece 347 (see FIG. 35).

The collar 328 is the third half 3 of the pressed piece 347.
When the slider 320 moves further forward after abutting on the right side of the 47a, the collar 328 acts to press the right side of the rear half 347a to the left, so that the eject lever 340 is slightly clocked. It is rotated in the direction of rotation. This is because the rear end of the media holder 300 is supported by the mechanical chassis 200 via the fulcrum lever 310.
And the fulcrum lever 31 during loading.
0 is rotated from the state where the rear end connected to the media holder 300 is located slightly above the main surface 210 of the mechanical chassis 200 to almost the same height as the main surface 210, and the rear end is slightly rearward. When the eject lever 340 is left as it is, the media holder 300 moves rearward, so that the media holder 300 moves rearward.
D12 is pushed forward by the eject lever 340. Therefore, the eject lever 340 is further rotated clockwise as described above, and the abutting portion 34 is rotated.
1a escapes rearward with the tip of the MD 12 moving rearward. Also, this eject lever 3
The rotation of 40 causes the stopper edge 326 of the slider 320 to move.
Is separated from the right edge 346 following the stopper edge 345 of the eject lever 340.

When the slider 320 reaches the front end of the moving range, the collar 328 comes into contact with the right side of the front half 347b of the pressed piece 347 of the eject lever 340, and the eject lever 340 is moved to the front half of the pressed piece 347. When the right side surface of the portion 347b abuts on the collar 328, the rotation in the counterclockwise direction, that is, the rotation in which the MD 12 in the loaded state is pressed forward is prevented (see FIG. 36).

Then, in the meantime, the media holder 30
0 is in the loading state. At this time, the fulcrum lever 31
Since the media holder 300 is pivoted so as to fall backward, the media holder 300 is lowered to the loading position while being slightly retracted, whereby the MD 12 that has been inserted into the media holder 300 halfway is automatically moved from the middle. You will be drawn in.

When the slider 320 is moved backward from the front end of the moving range, the media holder 300 is raised toward the unloading position as described above. When the left end 327 of the piece 326 to be stopped goes behind the rear end of the right edge 347 following the stopper edge 346 of the eject lever 340, the eject lever 3
40 is rotated counterclockwise when viewed from above by the tensile force of the extension coil spring 344, and its stopper edge 345 engages with the stopper piece 326 of the slider 320 to lock the slider 320 at the rear end of its moving range. At the same time, the contact portion 341a of the arm portion 341 presses the MD 12 so that a part thereof protrudes forward from the media holder 300 so that the protruding portion can be grasped and taken out.

As described above, the timing at which the slider 320 is moved forward to start lowering the media holder 300 toward the loading position is determined by the right end of the stopper edge 345 of the eject lever 340 and the slider 32.
Since it is determined by the relative positional relationship between the zero stopper piece 326 and the left end, accurate timing can be taken. Further, the arm 341 of the eject lever 340
Of the contact part 341a of the slider 320
28 is performed by pressing the right side surface of the rear half portion 347a of the pressed piece 347 of the eject lever 340, so that the amount of force required for that is small.

When the MD 12 is loaded, the guide shaft 21 guides the MD 12 to a predetermined mounting position.
Positioning projections 219 for positioning the MD 8 and the MD 12 at predetermined positions are projected from the main surface 210 of the mechanical chassis 200 (see FIGS. 6, 37 to 39).

The guide shaft 218 protrudes from the front end of the main surface portion 210 to the left, and includes a base portion 218a having a circular shape in plan view and a guide portion projecting from above the base portion 218a. Is a short cylindrical portion 21 having an outer diameter slightly smaller than the base portion 218a.
8b and a conical portion 218c which is continuous and substantially conical on the cylindrical portion 218b. The conical portion 218c is formed in a shape such that its axis is slightly inclined forward.

The positioning protrusion 219 is provided at a position on the left side of the rear end of the main surface portion 210, and has a circular base portion 219a having a planar shape and an outer diameter of the base portion 219a.
The positioning portion 219b, which is a conical portion having a slightly smaller and shorter conical shape, also has a function as a guide shaft.

When the media holder 300 holding the MD 12 comes to the above-described loading position (see FIG. 37), first, the conical portion 218 of the guide shaft 218
The leading end of c is relatively inserted into a circular positioning hole 12a that functions as a guide hole formed on the bottom surface of the MD 12 to be guided (see FIG. 38). As the media holder 300 further descends, the positioning hole 12a is guided by the conical portion 218c of the guide shaft 218 and finally engages with the cylindrical portion 218b (see FIG. 39). At the same time as the positioning hole 12a engages with the cylindrical portion 218b, the positioning hole 12b formed on the bottom surface of the MD 12 on the opposite side to the position where the positioning hole 12a is formed and functions as a guide hole long in the front-rear direction is formed. While being guided by the positioning portion 219b, it finally engages with its base, whereby the MD 12
It is positioned with respect to the 0 main surface portion 210 (see FIG. 39).

Then, the MD 12 is mounted on the media holder 30.
When the shutter 12c is opened in the process of being inserted into the disc 0 and the media holder 300 comes to the loading position, the disc 12d of the MD 12 is placed and held on the turntable 222.

The guide shaft 218 and the positioning protrusion 219 can be formed by press-forming at the same time when the mechanical chassis 200 is press-formed. That is,
If the guide shaft 218 is taken as an example, as shown in FIGS. 40 to 44, the guide shaft 218 having a complicated shape can be easily formed by squeezing in several steps.
Moreover, the position accuracy with respect to the mechanical chassis 200 is higher than when a separate member is attached to the mechanical chassis to form the guide shaft, and a complicated shape that is difficult to form by cutting, for example, the guide shaft described above. As in the case of 218, the one in which the axis of the conical portion 218c is inclined can be easily formed.

The ejecting direction of the slider 320,
That is, the rearward movement is achieved by moving the eject knob 350 supported movably in the front-rear direction on the left side surface portion of the outer casing 2 rearward, so that the left side surface portion 130 of the main chassis 100 can move back and forth. This is performed via the supported relay slider 360 (see FIGS. 51 to 54).

The relay slider 360 is formed of a sheet metal material, is supported movably in the front-rear direction on the inner surface of the left side portion 130, and is forwardly moved by a tension coil spring 361 stretched between the left side portion 130. Movement has been energized. A pressing protruding piece 362 protruding inward is formed on the upper edge of the rear end of the relay slider 360. Further, a pressed piece 363 protruding outward is formed at a front end edge of the relay slider 360. The pressed piece 363 is connected to the left side surface 130 of the main chassis 100.
And protrudes outside of the left side surface portion 130 through an opening 131 (see FIG. 3) formed in the front and rear direction.

On the inner surface of the eject knob 350, two pressing projections 351 and 352 are provided so as to be spaced apart from each other in the front and rear directions, and the rear pressing projection 352 is connected to the relay slider 36.
0 is in contact with the front surface of the pressed piece 363 (see FIG. 51). A pressed piece 329 protruding outward is formed at the upper end of the portion near the rear end of the slider 320, and the slider 320 is at the front end of the movement range, that is, the media holder 300 is at the loading position. In a certain state, the pressed piece 329 is connected to the relay slider 36.
It is in contact with the zero pressing projection 362 from behind.

Thus, the loaded MD1
The ejection of No. 2 is performed by moving the ejection knob 350 backward. That is, when the eject knob 350 is moved rearward, the push protrusion 352 pushes the same, and the relay slider 360 moves rearward (FIG. 5).
2 to FIG. 54), the pressing protruding piece 362 presses the pressed piece 329 of the slider 320 rearward, whereby the slider 320 moves rearward, the media holder 300 is raised, and reaches the unloading position. The MD 12 is ejected.

Next, the opening and closing of the cover 8 will be described (see FIGS. 45 to 59).

The cover 8 is rotatably supported by the main chassis 100. The cover body 8 is formed of a metal member, and includes a main body 400 for closing the opening 7 of the outer casing 2 and arms 401 and 402 projecting substantially rearward from both left and right sides of the main body 400 (FIG. 45). And
Rear ends of the arms 401 and 402 are rotatably supported by front ends of the left side surface 130 and the right side surface 120 of the main chassis 100. A spring hook 403 protrudes rearward from a lower edge of a portion near the rear end of the right arm 402, and the spring hook 403 and the main chassis 1
A tension coil spring 404 is stretched between the right side surface portion 120 and the spring hooking piece 121 protruding from the lower edge of the portion near the front end (see FIGS. 4 and 45). A turning force in a counterclockwise direction as viewed from the left, that is, a direction in which the opening 7 is closed is urged. still,
This turning force is not so strong, and it is sufficient if the turning force is sufficient to rotate the cover body 8 to the closing position for closing the opening 7.

An engagement piece 405 functioning as a locked portion is projected from the lower edge of the front end of the left side of the left arm 401.
Further, a pressing surface 406 facing downward at a position above the engagement piece 405 is formed. Further, a pressed surface (second pressed portion) 407 is formed continuously at the rear end of the pressing surface 406, facing downward and inclined backward and downward.

Further, three ribs 408, 408, 408 are provided on the inner surface of the main body 400 at right and left at substantially equal intervals, and the lower edges 40 of these ribs 408, 408, 408 are provided.
8a, 408a, and 408a are pressed edges (first pressed portions).

A lock slider 410 as locking means is supported on the inner surface of the left side surface portion 130 of the main chassis 100 so as to be movable in the front-rear direction (see FIGS. 46 to 59). The lock slider 410 has long holes 411 and 412 formed therein supported by support pins 132 and 133 implanted in the left side surface portion 130 so as to be movable in the front-rear direction. The front slot 411 includes a front portion 411a and a rear portion 411b continuous with the rear end of the front portion 411a, and the rear portion 411b is located slightly above the front portion 411a.

At the lower edge of the rear end of the lock slider 410, a spring hook 413 is provided so as to project therefrom.
3 and the tension coil spring 42 between the spring hook 134 protruding from the lower edge of the left side surface 130 of the main chassis 100.
0 is stretched, whereby the lock slider 410 is
Is biased to move forward. Therefore,
The lock slider 410 is located at the front end of its moving range when no backward moving force is applied thereto (see FIG. 46).

At the front end of the lock slider 410, a lock piece 4 functioning as a lock for locking the cover 8 is provided.
14 are provided. That is, the lock slider 410
A lock piece 414 protrudes upward from the upper edge of the front end, and a lock claw 414a protrudes forward from the upper end of the lock piece 414.

A pressed piece 415 projects upward from the rear end of the lock slider 410, and a pressed section 415 a is formed at the front end of the pressed piece 415. Further, a stopper piece (first stopper portion) 416 is provided to project upward at a position slightly forward of the rear end of the upper edge of the lock slider 410. A stopper piece 417 protrudes outward, that is, leftward at a position near the front end of the upper edge of the slider 320.

Further, the left side 1 of the main chassis 100
A temporary stop piece 135 is provided at the front end of 30 so as to project inward, that is, rightward.

When the media holder 300 is in the loading position, the cover 8 is locked at the closing position where the opening 7 is closed. That is, slider 3
20 is located at the front end of the moving range,
Both 60 and the lock slider 410 are located at the front end of the movement range. The eject knob 350 also receives the moving force urged by the relay slider 360 via the pressed piece 363 and the pressing protrusion 352 of the relay slider 360, and is located at the front end of the moving range. When the lock slider 410 is located at the front end of the moving range, the rear portion 41 of the long hole 411 on the front side is located.
1b is engaged with the support pin 132, and its lock claw 4
14a is engaged with the engagement piece 405 of the cover body 8, whereby the cover body 8 is locked at its closed position (see FIGS. 46 and 51).

As described above, when the MD 12 is being loaded, the lock claw 4 of the lock slider 410 is locked.
14a is engaged with the engaging piece 405 of the cover body 8, whereby the cover body 8 is locked in the closed position, so that the cover body 8 is inadvertently rotated to the open position. There is no such thing.

Further, when the media holder 300 is at the loading position, the pressed piece 329 of the slider 320 comes in close proximity to or abuts the pressing protrusion 362 of the relay slider 360 from behind, and the pressed piece 363 of the relay slider 360 is ejected. The pressed portion 415a of the lock slider 410 is brought into close proximity to or abuts the pressing protrusion 352 of the knob 350, and the pressed protrusion 35 of the eject knob 350 is
1 and the stopper 416 of the lock slider 410 is connected to the stopper 41 of the slider 320.
7 from behind (see FIG. 51).

When ejecting the MD 12, the eject knob 350 is moved backward.

When the eject knob 350 moves rearward, the pressing projection 352 presses the pressed piece 363 of the relay slider 360 rearward, and the relay slider 36 moves.
0 is moved rearward, and the pressing protrusion 351 of the eject knob 350 is pressed by the pressed portion 41 of the lock slider 410.
The lock slider 410 is moved backward by pressing the 5a backward. By this, Rock Slider 4
The ten locking claws 414a are disengaged rearward from the engagement pieces 405 of the cover body 8, and the lock on the cover body 8 is released (see FIGS. 47 and 52). During this time, the media holder 300 moves to the unloading position, and the MD 12 is ejected.

When the MD 12 is ejected, the cover body 8 is provided with a tension coil spring 40 which is energizing the power.
4 is rotated so as to open the opening 7 against the resilience of the opening 4.

When the media holder 300 is raised toward the unloading position, the cover body 8 is moved by the MD 12 held by the media holder 300.
The lower edges of the ribs 408, 408, 408, ie, the pressed edges 408a, 408a, 408a are pressed upward, whereby the cover body 8 is rotated toward the open position where the opening 7 is opened. (See FIGS. 48 to 53).

When the cover 8 is opened to some extent, the rear end of the upper edge of the lock piece 414 of the lock slider 410 moving backward is brought into contact with the pressed surface 407 of the cover 8 (see FIG. 49). When the lock slider 410 further moves rearward therefrom, the rear end of the upper edge of the lock piece 414 presses the pressed surface 407, whereby the cover body 8 is rotated to the open position (FIG. 50). And FIG. 54). Therefore, in this case, the lock slider 410 functions as a pressing unit, and the lock piece 414 functions as a pressing unit. Therefore, a part of the MD 12 is projected from the opening 7 to the outside by the eject lever 340.

Thus, when the MD 12 is ejected,
To rotate the cover body 8 to the open position, the cover body 8 is rotated halfway by the MD 12 that is rising, and the rotation of the cover body 8 is locked by the lock piece 414 against the pressed surface 417. By pressing by pressing, without increasing the size of the device,
The load on the MD 12 can be reduced, and the MD 1
2 enables smooth ejection.

When the force pressing the eject knob 350 rearward is removed, the forward moving force of the extension coil spring 361 urged by the relay slider 360 is applied to the pressed piece 363 of the relay slider 360. Received via the pressing protrusion 352 of the eject knob 350, and returns to the front end of the moving range.

When the eject knob 350 moves to the front end of the moving range, the pressing protrusion 351 separates forward from the pressed portion 415a of the lock slider 410.
The lock slider 410 moves forward by the tensile force of the tension coil spring 420. However, as described above, the state in which the slider 320 has moved to the rear end of the moving range is locked,
7, the stopper piece 416 of the lock slider 410 trying to return to the front abuts on the stopper piece 417 of the slider 320 halfway, preventing further forward movement (see FIG. 55). . Therefore, in this case, the slider 320 functions as a stopping means (first stopping means) for preventing the movement of the lock slider 410,
The stopper piece 417 functions as a stopper (first stopper).

When the stopper 416 of the lock slider 410 abuts against the stopper 417 of the slider 320 to prevent the lock slider 410 from moving further forward, the lock 414 of the lock slider 410 is not covered. Since the MD 8 is located forward of the pressed surface 407 of the body 8, when the MD 12 is taken out of the MD playback device 1, there is no longer any object that keeps the cover body 8 in the open position. The rotation of the tension coil spring 404 causes the opening 7 to rotate to the closed position, thereby closing the opening 7 of the outer casing 2 (see FIG. 56).

When the MD 12 is ejected (discharged), as described above, the media holder 300 is at the standby position, and the cover 8 is
(See FIG. 56). Therefore, when the insertion end of the MD 12 is inserted into the insertion recess 11 and then the MD 12 is pushed in, the pushing force is applied to the cover body 8.
Is pressed to the cover body 8 to apply a turning force toward the open position, whereby the opening 7 is opened,
The MD 12 is inserted as it is (see FIG. 57).

When the MD 12 is almost inserted, the cover 8 is automatically retracted, the cover body 8 moves to the closing position, and the MD 12 is mounted at the predetermined mounting position, as described above. .

The operation of locking the cover 8 at the closing position in this process will be described (see FIGS. 57 to 59).

That is, MD1 is stored in the media holder 300.
2 is inserted (see FIG. 57), the eject lever 340 is rotated by the MD 12, the lock on the slider 320 by the stopper edge 345 of the eject lever 340 is released, and the slider 320 is biased by the tension coil spring 322. As it advances, the media holder 300 descends toward the loading position.

When the stopper 417 moves forward due to the advance of the slider 320, the lock slider 41 is moved.
0 moves forward by the urging force of the extension coil spring 420. However, the lock slider 410 has a front elongated hole 411 in which a boundary between the front portion 411a and the rear portion 411b is engaged with the support pin 132 and a spring hook piece to which the tension of the extension coil spring 420 is exerted. From the relationship of the position 413, the lock slider 420 is energized by the turning force in the direction in which the front end thereof is displaced upward with the engagement portion between the long hole 412 and the support pin 133 as a rotation axis,
For this reason, the front edge (second stopper portion) 418 of the lock slider 410 abuts on the temporary stop piece 135 of the main chassis 100 to prevent further forward movement.
The slider 320 is located in a state of being separated from the stopper piece 417 (see FIG. 58). Therefore, in this case, the main chassis 100 functions as a stopping means (second stopping means) for stopping the lock slider 410, and the temporary stop piece 135 functions as the stopper part 8 (second stopper part).

When the cover 8 is turned to the closed position by loading the MD 12, the pressing surface 406 functioning as a release unit for releasing the lock is released by the lock piece 414 of the lock slider 410. The upper edge is pressed downward (see FIG. 59), whereby the lock slider 410 rotates so that its front end moves downward, and its front end edge 418 is moved to the main chassis 1.
00, and moves downward by the tensile force of the extension coil spring 420, and its locking claw 414
a engages with the engagement piece 405 of the cover body 8 at the closed position, and locks the cover body 8 at the closed position (FIG. 51).
reference).

At the rear end of the main chassis 100, a battery case 500 serving as a battery storage case for storing a battery described later is provided.
Are supported (see FIG. 60).

The case body 510 is formed of an insulating material, for example, a synthetic resin, and has a tubular shape with left and right ends opened (see FIGS. 60 and 61). In other words, a semi-cylindrical portion is formed on the lower surface of a rectangular tubular portion that is flat in the vertical direction and long in the left-right direction, and has an upper rectangular tubular space 511 that is a storage space for storing batteries. And the lower semicylindrical space 512 are continuous.

The case main body 510 is fixed to the rear end of the main chassis 100 by screws or the like.

The opening 513 on the right side of the case body 510 is opened and closed by the lid 520 (see FIGS. 60 to 63). The lid portion 520 includes a lid body 530 made of synthetic resin, a hinge body 540 made of a conductive material, and a minus contact plate 550 made of the same conductive material. The case body 510 is supported via a fulcrum plate 560 made of a conductive material. Attached to.

The lid main body 530 has a main portion 531 having substantially the same size as the open end of the case main body 510 and a front edge of the inner surface of the main portion 531 (a portion on this side with respect to the lid 520 is referred to as a "base end portion"). )), The peripheral wall portion 5 protruding from the peripheral edge.
32 of the peripheral wall portion 532 (the lid portion 52
Regarding 0, this side is referred to as a “tip portion”. Engagement pieces 533, 533 are protrudingly provided on the inner surfaces of the upper and lower ends of the portion located at ()) and at positions separated from the main portion 531.

Further, at the inner surface of the main portion 531, supported pieces 534, 534 extending in the front-rear direction are provided at positions substantially near the upper and lower edges in the front-rear direction near the center. The amount by which the supported pieces 534 and 534 protrude from the main portion 531 is substantially the same as that of the peripheral wall portion 532, and the surfaces of the protruding ends facing each other are supported grooves 534 extending in the front-rear direction.
a, 534a are formed. A retaining piece 535 protrudes from the inner surface of the main portion 531 at a position slightly closer to the base end than the supported pieces 534 and 534. Further, a compression projection 536 protrudes at a portion slightly distal from the retaining piece 535, and a surface 536a on the base end side of the compression projection 536 is formed as an inclined surface whose projection amount increases toward the distal end. I have.

The hinge body 540 is formed in a frame shape slightly smaller than the lid main body 530, and support pieces 541, 541 projecting outward are formed at upper and lower ends of a base end thereof. In 541, supported holes 541a, 541a are formed. An elastic piece 542 projects from the distal end toward the proximal end and slightly outward.

The upper and lower edges of the hinge body 540 are supported by the supported grooves 534a,
534a is slidably engaged. And the hinge body 5
When the fork 40 is moved toward the distal end of the lid body 530, the elastic piece 542 passes over this while being bent inward by the retaining piece 535 of the lid body 530, and climbs over the retaining piece 535 to the distal side. The bent portion returns to its original position, and its tip engages with the tip side surface of the retaining piece 535, so that the lid body 530 and the hinge body 540 can move in the front-rear direction with each other. The pieces 535 and the elastic pieces 542 are coupled to each other in a state where they are prevented from coming off by engagement (see FIG. 62).

The negative contact plate 550 has a resilient piece 552 functioning as a negative terminal portion from the distal end side edge of the base 551 having a vertical width substantially equal to the vertical width of the base end of the hinge body 540. Projecting towards the part side,
A contact pin 553 protrudes inward from the distal end of the elastic piece 552. A connecting piece 554 protrudes outward from the lower edge of the base 551.
The 54 has an insertion hole 554a.

The base 551 of the minus contact plate 550 is fixed to the inner surface of the base end of the hinge body 540 by spot welding.
A contact pin 553, which is a terminal on the minus side, is located substantially at the center of the lid 520, inside the frame formed by 40.
The connection piece 554 is the supported piece 541 on the lower side of the hinge body 540.
And the insertion hole 554a thereof is aligned with the supported hole 541a of the supported piece 541 below the hinge body 540.

The fulcrum plate 560 has support pieces 562 and 563 projecting forward from both upper and lower edges of the right end of a substantially plate-shaped main part 561 extending in the left-right direction.
3 are formed with support holes 562a and 563a, respectively. Further, from the front edge of the lower support piece 563, the connection piece 5
64 protrudes forward.

Thus, the fulcrum plate 560 has its main part 561
Are fixed to the right end of the front wall of the case body 510 by screws, and the connection piece 564 is connected to the main chassis 100.
Is soldered to a power supply circuit of a printed wiring board (not shown) which is fixed to the power supply circuit.

Then, the supported piece 54 of the hinge body 540
1, 541 and the connection piece 554 of the minus contact plate 550 are superimposed on the support pieces 562 and 563 of the fulcrum plate 560, respectively. At this time, the connection piece 554 of the minus contact plate 550 is overlaid on the upper side of the support piece 563 below the fulcrum plate 560. Then, the hinge shaft 555 is
62a, supported holes 541a, 541a, insertion holes 554
a, is inserted into the support hole 563a, whereby the hinge body 540 is rotatably supported by the fulcrum plate 560. Also,
The negative contact plate 550 is connected via a fulcrum plate 560 to a power supply circuit of a printed wiring board (not shown).

The open end face of the case body 510, that is,
At the rear edge of the right end surface, an engaging portion 514 is provided so as to project outward. The vertical width of the engaging portion 514 is the same as that of the lid main body 530.
Is slightly smaller than the vertical interval of the peripheral wall portion 532. Slits 514a and 514a are formed at both upper and lower ends of the engaging portion 514, respectively.

When closing the opening 513 of the case main body 510 with the lid 520, the lid main body 530 is connected to the hinge 5
6 is moved to the tip side with respect to FIG.
3), and in this state, it is rotated with respect to the fulcrum plate 560 so as to close the opening 513. Thereby, the opening 51
3 is closed by the lid main body 530, and its peripheral wall portion 532
Of the case body 510 covers the engagement portion 514 of the case body 510. In this state, when the lid main body 530 is moved to the base end side with respect to the hinge body 540, the engagement pieces 533, 533 are inserted into the slits 514 of the case main body 510.
a, 514a, during which the elastic piece 542 of the hinge body 540 is pushed toward the distal end side of the inclined surface 536a of the compression projection 536 of the lid body 530, and is bent to the left. The frictional force between the piece 542 and the inclined surface 536a increases, whereby the lid 520 is locked while closing the opening 513 of the case body 510 (see FIG. 64).

When opening the opening 513 of the case main body 510, the cover main body 530 is moved to the tip end side with respect to the hinge body 540, and the engaging pieces 533, 533 are inserted into the slits 514a, 514a of the case main body 510. And the elastic piece 542 of the hinge body 540 and the lid body 5
The pressure contact state of the compression projection 536 with the inclined surface 536a is released (see FIG. 63). As a result, the lid 520 is unlocked from the closed position, and the opening 513 can be opened by rotating the lid 520.

At the left end of the case body 510, a terminal block 570 is slidably arranged in the left-right direction.

The terminal block 570 functioning as a positive terminal portion includes a terminal holder 580 made of an insulating material and a positive terminal plate 590 supported by the terminal holder 580 (see FIG. 65).

The terminal holder 580 is made of an insulating material, for example,
A base portion 581 made of a synthetic resin and having a planar plate shape in the shape of a square plate, side portions 582, 582 protruding upward from both front and rear edges of the base portion 581, a left edge and side portions 582, 582 of the base portion 581 A left side surface portion 583 provided so as to bridge between the left end portions and a right side portion 58 protruding downward from a portion excluding a front end portion of a right edge of the base portion 581.
4 are integrally formed. The left ends of the side surfaces 582, 582 are slightly protruded leftward from the left edge of the base portion 581, and the eaves 585 extend over the upper edge of the left end and the upper edge of the left side portion 583. It is formed integrally.

Projecting ridges 582a, 582a extending in the vertical direction are provided on the opposing surfaces of the left end portions of the side portions 582, 582.
Are protruded, whereby grooves 582b and 582b are formed between itself and the left side surface portion 583. Also, the side part 5
Engagement holes 582c, 582c are formed at the upper ends of the portions of the grooves 82, 582 where the grooves 582b, 582b are formed. Further, a guided protrusion 582 is provided at a substantially central position in the vertical direction on the outer surface of the left end of the side surface portions 582, 582.
d and 582d are protruded.

The lower end of the rear side surface portion 582 projects slightly downward, and a projection 581a is formed extending from a portion of the lower surface of the base portion 581 corresponding to the front end of the right side surface portion 584 to the left end. An arrangement recess 581b is formed on the lower surface of the base 581. The right ends of the ridge 581a and the side surface 582 are further projected downward, and the guided projections 581c, 5
81c protrudes outward.

A hole 584a is formed at the center of the upper end of the right side portion 584, and a stopper projection 584b is projected from the lower end of the left side of the right side portion 584. The facing hole 584a is formed so that its outer shape can insert a plus electrode of a gum type battery and an AA battery described later.

A hole 58 facing the center of the left side surface 583
3a, and the facing hole 583a is formed in the same size as the facing hole 584a so that the outer shape thereof can be inserted with the plus electrode of the gum type battery and the AA battery.

The positive terminal plate 590 is formed of a conductive metal plate, and has a substantially rectangular intermediate portion 59 in plan view.
AA type terminal portion 59 protruding downward from the right edge of the intermediate portion 591 and serving as a positive terminal of an AA battery described later.
2 and a gum-type terminal portion 593 protruding upward from the left edge of the intermediate portion 591 and serving as a positive terminal of a gum-type battery described later.
Are integrally formed.

The intermediate portion 591 is connected to the terminal holder 58.
0, and the size of the AA terminal portion 592 is formed so as to fit within the size of the right side portion 584 of the terminal holder 580.
In addition, a projection 592a projecting slightly above the upper surface of the intermediate portion 591 is formed at the center of the upper edge. The gum-type terminal portion 593 is formed to be slightly smaller than the left side surface portion 583 of the terminal holder 580.

The positive terminal plate 590 has a terminal portion 592 for AA type and a right side portion 5 of the terminal holder 580.
84 is disposed so as to be in close contact with the left side surface thereof,
2a comes into contact with the front end of the base portion 581 of the terminal holder 580, and the lower edge of the AA terminal portion 592 engages with a stopper projection 584b formed on the left side surface of the right side surface portion 584 of the terminal holder 580. And by these,
Positive terminal plate 590 is in a state where it is prevented from moving leftward and downward. In addition, a part thereof faces rightward from a facing hole 584a formed in the right side surface portion 584.

The gum type terminal portion 593 is in close contact with the left side surface of the left side surface portion 583 of the terminal holder 580, and a part thereof faces rightward from a facing hole formed in the left side surface portion 583.

A flexible printed wiring board connected to a power supply circuit of a printed wiring board (not shown) is connected to the positive terminal board 590.

As described above, the holding plate 586 is attached to the left end of the terminal holder 580 on which the plus terminal plate 590 is mounted. The holding plate 586 is formed of an insulating material, for example, a synthetic resin, has a plate shape slightly smaller than the left side surface 583, and engaging pieces 586 a and 586 a project upward from lower end portions of both front and rear side edges thereof. And the engagement piece 5
Engagement claws 586b, 586b projecting forward and rearward, respectively, are formed at the upper ends of 86a, 586a.
In addition, a positioning protrusion 586c is protruded from substantially the center of the left side surface of the holding plate 586.

The holding plate 586 is connected to the terminal holder 58.
0 is inserted from below into the grooves 582b, 582b formed at the left end so as to be located on the left side of the gum-type terminal portion 593 of the plus terminal plate 590. And the groove 582b,
582b, the engaging claw 5
86b and 586b are engaging holes 582 of the terminal holder 580.
c, 582c, thereby preventing the holding plate 586 from falling off from the terminal holder 580. In this manner, the left side of the gum-type terminal portion 593 of the positive terminal plate 590 is pressed by the pressing plate 586, which also prevents the positive terminal plate 590 from moving to the left with respect to the terminal holder 580. Thus, the terminal block 570 is formed.

A guide groove 511 extending slightly from the left end to the right is formed on both front and rear inner surfaces of the rectangular cylindrical space 511 of the case body 510.
a, 511a are formed, and guide grooves 512a, 512a are formed in a portion of the semi-cylindrical space 512 on the front inner surface close to the rectangular cylindrical inner surface 511, extending slightly from the left end to the right.

In the terminal block 570, the guided protrusions 582d, 582d are slidably engaged with the guide grooves 511a, 511a of the case body 510, and the guided protrusions 581c, 581c are connected to the case body 510.
Are slidably engaged with the guide grooves 512a and 512a of the case main body 510.
It is movably supported in the left-right direction within the length range of 1a, 512a and 512a. A compression coil spring 587, which is externally fitted to the positioning protrusion 586c, is contracted between the inner surface of the rear end of the left side surface portion 130 of the main chassis 100 and the left side surface of the pressing plate 586 of the terminal block 570. The terminal block 570 is urged with a moving force toward the right.

The above-mentioned battery case 500 has a flat prismatic shape, that is, a so-called gum type battery 601 and an AA type battery 6.
02 can be selectively mounted.

The gum type battery 601 is mounted in the rectangular cylindrical space 511 with the plus electrode 601a on the left side (see FIG. 66). When the gum type battery 601 is inserted into the rectangular cylindrical space 511 and the lid 520 is closed, the contact pins 553 of the minus terminal plate 550 provided on the lid 520 elastically contact the minus electrode 601b of the gum type battery 601. ,Also,
The positive electrode 601a of the gum type battery 601 faces the gum type terminal portion 593 of the terminal block 570 and abuts through the hole 583a, and presses this to the left, so that the terminal block 570 compresses the compression coil spring 587. While moving to the left. In this manner, the gum-type battery 601 is resiliently held from both the plus electrode 601a and the minus electrode 601b, and is thereby securely connected to a power supply circuit of a printed wiring board (not shown).

The AA battery 602 has a positive electrode 602 in a space formed by a semi-cylindrical space 512 and a rectangular cylindrical space 511.
It is mounted with the left side of a (see FIG. 67). When the AA battery 602 is inserted into the spaces 511 and 512 and the cover 520 is closed, the contact pins 553 of the minus terminal plate 550 provided on the cover 520 are connected to the AA battery 60.
2, the positive electrode 602a of the AA battery 602 faces the AA terminal 592 of the terminal block 570, and contacts the AA battery 602 through the hole 584a. Press the terminal block 5
70 moves to the left while compressing the compression coil spring 587. In this way, the AA battery 602 is resiliently held from both the plus electrode 602a and the minus electrode 602b, and is thereby securely connected to a power supply circuit of a printed wiring board (not shown).

As described above, in the battery case 500, the gum type battery 601 and the AA type battery 602 can be selectively used, and the terminal block 570 is moved in the left-right direction, Since the batteries 601 and 602 are movable in the longitudinal direction, variations in the sizes of the batteries 601 and 602 can be absorbed. Also, the battery 60
1, 602 plus electrode 601a, 602a and minus electrode 601b, 602b to the respective terminal portion 593,
592 and the contact pin 553 are in elastic contact,
Even when the batteries 601 and 602 move momentarily due to an external shock, the respective terminal portions 593 and 592 and the contact pin 553 are connected to the terminals 601 a and 6 of the batteries 601 and 602.
02a and 601b, 602b can be instantaneously followed to prevent instantaneous power-off.

Further, as described above, the terminal holder 58
A hole 583a facing the left side surface 583 and a hole 584a facing the right side surface 584, and the external shape of the facing holes 583a and 584a is defined as the positive electrode of the gum type battery 601 and the AA battery 602. The 601a and 602a are formed to have a size that allows them to be inserted.
a, 584a are gum-type batteries 601 or AA batteries 602
When the negative electrode 601b and 602b are inserted by mistake in the opposite directions, the negative electrode 60
This is to prevent 1b and 602b from coming into contact with the gum type terminal portion 593 or the AA type terminal portion 592 of the plus terminal plate 590. Therefore, even when the gum type battery 601 or the AA type battery 602 is inserted by mistake, there is no possibility of causing a short circuit. Therefore, in this case, the left side surface portion 583 or the right side surface portion 584 of the terminal holder 580 functions as an insulating portion.

[0175]

As is apparent from the above description, the guide rail according to the present invention is a guide rail which is engaged with an engaging portion of a moving body to guide the moving body at the time of movement. A base formed integrally with the base at an opening edge of an opening formed in the base of the workpiece made of a material;
Since the base has a bent portion formed integrally with the base at a predetermined angle at the tip of the base, a guide rail is formed separately from the work, and this is formed on the base of the work. Since there is no need to support and no mounting screws are required, the number of parts can be reduced, which contributes to cost reduction.

Further, since the guide rail is formed integrally with the base portion of the workpiece, it is difficult for the guide rail to be misaligned with respect to the base portion, and good positional accuracy of the guide rail with respect to the base portion is ensured. Can be.

Further, the guide rail can be processed when the workpiece is processed, and since the guide rail is formed integrally with the base portion, an assembling operation for supporting the guide rail on the base portion is performed. There is no necessity, and the working time can be greatly reduced.

According to the second aspect of the present invention, since an R-shaped sliding surface having a cross-sectional shape is formed at the edge of the bent portion,
The moving body is smoothly moved.

According to the third aspect of the present invention, the bent portion is bent so as to be orthogonal to the tip of the base portion, and the sliding surfaces are formed at both end edges of the bent portion and the bent portion is formed. The sliding surface on the side is formed so as to protrude from the surface of the base in a direction orthogonal to the tip of the base, so that when the engaging portion of the moving body is engaged with the bent portion and is moved. In addition, the moving body can be more smoothly moved without the engaging portion coming into contact with the surface of the base.

In the inventions set forth in claims 4 to 6, since the reinforcing ribs are formed on the opening edge and the base of the opening, the strength of the guide rail is improved.

The method of forming a guide rail according to the present invention is a method of forming a guide rail which is engaged with an engaging portion of a moving body and guides the moving body when moving. A base processing step of forming a base integrally with the base at an opening edge of the opening formed in the base, and a bending part forming a predetermined angle with the base at the tip of the base to be integrated with the base by bending; Since there is provided a process for forming a bent portion, there is no need to form a guide rail separately from the workpiece and to support the guide rail on the base portion of the workpiece, and there is no need for mounting screws for mounting. Therefore, the number of parts can be reduced, which contributes to cost reduction.

Further, since the guide rail is formed integrally with the base portion of the workpiece, it is difficult for the guide rail to be displaced from the base portion, and good positional accuracy of the guide rail with respect to the base portion is ensured. Can be.

Further, the guide rail can be processed when the workpiece is processed, and since the guide rail is formed integrally with the base portion, an assembling operation for supporting the guide rail on the base portion is performed. There is no necessity, and the working time can be greatly reduced.

According to the eighth aspect of the present invention, since there is provided a sliding surface forming step of forming an R-shaped sliding surface with a cross-sectional shape at the edge of the bent portion by press molding, it is only necessary to press. The sliding surface for smoothly moving the moving body can be formed by the simple method described above.

According to the ninth aspect of the present invention, the bent portion is bent so as to be orthogonal to the front end portion of the base portion, and the sliding surface forming step includes connecting the sliding surface to both end edges of the bent portion. At the same time as forming, the sliding surface on the bent portion side is formed so as to protrude with respect to the surface of the concave portion in a direction orthogonal to the distal end portion of the base by forming a concave portion at the distal end portion of the base portion.
Two sliding surfaces can be simultaneously formed by one press molding, and a sliding surface protruding from the surface of the base can be formed by a simple method of simply pressing.

Another guide rail of the present invention is a guide rail which is engaged with an engaging portion of a moving body to guide the moving body when the moving body moves, and which is an outer edge of a base portion of a workpiece made of a sheet metal material. A base formed by bending a part of the bent edge formed in the base and facing the base, and a fold formed integrally with the base by forming a predetermined angle with the base at the tip of the base. Since it has a curved part, it is not necessary to form a guide rail separately from the workpiece and support it on the base part of the workpiece, and there is no need for mounting screws for mounting. Can be reduced, thereby contributing to cost reduction.

Further, since the guide rail is formed integrally with the base portion of the workpiece, it is difficult for the guide rail to be misaligned with respect to the base portion, and good positional accuracy of the guide rail with respect to the base portion is ensured. Can be.

Further, the guide rail can be processed at the time of processing the workpiece, and since the guide rail is formed integrally with the base portion, an assembling operation for supporting the guide rail on the base portion is performed. There is no necessity, and the working time can be greatly reduced.

Furthermore, the size of the workpiece is reduced in accordance with the size of the moving body supported by the guide rail by engaging with the guide rail, as compared with the case where the guide rail is formed on the base of the workpiece. For example, when the workpiece is a chassis provided inside the device, the size of the device can be reduced.

In addition, since the guide rail is formed at the outer edge of the workpiece, even when it is necessary to support a large moving body, the size of the workpiece does not change depending on the size of the moving body. It is possible to support moving objects,
Even if the moving body becomes large, it is difficult to increase the size of the workpiece.

According to the eleventh aspect of the present invention, an R-shaped sliding surface having a cross-sectional shape is formed at the edge of the bent portion, so that the moving body can move smoothly.

According to the twelfth aspect of the present invention, the bent portion is bent so as to be orthogonal to the front end portion of the base portion, and the sliding surfaces are formed at both end edges of the bent portion and the bent portion is formed. The sliding surface on the side is formed so as to protrude from the surface of the base in a direction orthogonal to the tip of the base, so that when the engaging portion of the moving body is engaged with the bent portion and is moved. In addition, the moving body can be more smoothly moved without the engaging portion coming into contact with the surface of the base.

Another method of forming a guide rail according to the present invention is a method of forming a guide rail which is engaged with an engaging portion of a moving body to guide the moving body when the moving body is moved. A bent part forming step of forming a bent part by bending a tip part of a bent edge formed on the outer edge of the base part of the object at a predetermined angle, and bending a part of the bent edge to face the base part Since there is provided a base processing step for forming a base located, there is no need to form a guide rail separately from the workpiece, and to support the guide rail on the base of the workpiece. Since it is not necessary, the number of parts can be reduced, which contributes to cost reduction.

Further, since the guide rail is formed integrally with the base portion of the workpiece, it is difficult for the guide rail to be misaligned with respect to the base portion, and good positional accuracy of the guide rail with respect to the base portion is ensured. Can be.

Further, the guide rail can be processed at the time of processing the workpiece, and since the guide rail is formed integrally with the base portion, an assembling operation for supporting the guide rail on the base portion is performed. There is no necessity, and the working time can be greatly reduced.

According to the fourteenth aspect of the present invention, there is provided a sliding surface forming step of forming an R-shaped sliding surface with a cross-sectional shape at the edge of the bent portion by press molding. The sliding surface for smoothly moving the moving body can be formed by the simple method described above.

According to the fifteenth aspect of the present invention, the bent portion is bent so as to be orthogonal to the front end of the base, and the sliding surface forming step is such that the sliding surface is formed at both ends of the bent portion. At the same time as forming, the sliding surface on the bent portion side is formed so as to protrude with respect to the surface of the concave portion in a direction orthogonal to the distal end portion of the base by forming a concave portion at the distal end portion of the base portion.
Two sliding surfaces can be simultaneously formed by one press molding, and a sliding surface protruding from the surface of the base can be formed by a simple method of simply pressing.

According to the sixteenth aspect of the present invention, whether the distance from the portion of the base where the recess is not formed to the base is the same as the distance from the top to the base on the sliding surface on the bent portion side? When the jig is pulled out after pressing the jig against a part of the base portion and a part of the bent edge in the base processing step to bend the bent edge, the jig is pulled out of the sliding surface. And does not interfere with the formation of the guide rail.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment when practicing the present invention.
These should not be construed as limiting the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention together with FIGS. 2 to 67, and is a schematic perspective view showing an appearance of an MD reproducing apparatus in a state where an opening for inserting and removing an MD is closed. .

FIG. 2 shows an MD with an opening for inserting and removing the MD.
It is a schematic perspective view which shows the external appearance of a reproducing device.

FIG. 3 is an exploded side view of the MD reproducing apparatus.

FIG. 4 is a bottom view showing a state where the mechanical chassis and the main chassis are combined.

FIG. 5 is an enlarged sectional view showing a damper member and a support hole for supporting the damper member.

FIG. 6 is a plan view of the mechanical chassis.

FIG. 7 is a bottom view of the mechanical chassis.

FIG. 8 is an enlarged perspective view of an auxiliary guide rail.

9 shows a method of forming an auxiliary guide rail together with FIGS. 10 and 11, and FIG. 9 is an enlarged sectional view showing a state in which an L-shaped bent portion is formed.

FIG. 10 is an enlarged sectional view showing a state in which a bent piece is formed.

FIG. 11 is an enlarged cross-sectional view showing a state where an auxiliary guide rail is formed by pressing a part of an L-shaped bent portion.

FIG. 12 shows another method of forming an auxiliary guide rail together with FIGS. 13 and 14, and FIG. 12 is an enlarged sectional view showing a state where an L-shaped bent portion is formed.

FIG. 13 is an enlarged sectional view showing a state in which a folded piece is formed.

FIG. 14 is an enlarged cross-sectional view showing a state in which a folded piece is bent so as to be in contact with an L-shaped bent portion to form an auxiliary guide rail.

FIG. 15 is an enlarged perspective view of still another auxiliary guide rail.

FIG. 16 shows still another method of forming an auxiliary guide rail together with FIGS. 17 to 19, and is an enlarged cross-sectional view showing a state in which a bent piece is formed.

FIG. 17 is an enlarged cross-sectional view showing a state where a bent piece is processed to form a bent portion.

FIG. 18 is an enlarged sectional view showing a state where a base is formed.

FIG. 19 is an enlarged cross-sectional view showing a state where the jig is pulled out to form an auxiliary guide rail.

FIG. 20 is an enlarged bottom view showing a state where a feed screw is supported by the mechanical chassis.

FIG. 21 shows a method of forming a bearing together with FIG. 22 and FIG. 23, and is an enlarged perspective view showing a state in which a slit is formed.

FIG. 22 is an enlarged perspective view showing a state where a U-shaped portion is formed.

FIG. 23 is an enlarged perspective view showing a state in which a bearing is formed with a receiving portion formed.

FIG. 24 shows another method of forming a bearing together with FIGS. 25 and 26, and is an enlarged perspective view showing a state in which a slit is formed.

FIG. 25 is an enlarged perspective view showing a state where a U-shaped portion is formed.

FIG. 26 is an enlarged perspective view showing a state where a receiving portion is formed and a bearing portion is formed.

27 shows a mechanism for moving the media holder together with FIG. 28. FIG. 27 is a left side view showing a state where the media holder is at the loading position.

FIG. 28 is a left side view showing a state where the media holder is at a standby position or an unloading position.

FIG. 29 is a right side view showing a state in which the toggle spring is acting in a direction for separating the mechanical chassis and the media holder, together with FIG. 30.

FIG. 30 is a right side view showing a state in which a toggle spring is acting in a direction to bring the mechanical chassis and the media holder closer.

FIG. 31 is a rear view showing a state where the media holder is at a standby position or an unloading position.

FIG. 32 is a rear view showing a state where the media holder is at a loading position.

FIG. 33 shows the operation of the eject lever together with FIGS. 34 to 36, and is an enlarged plan view showing a state before the eject lever is rotated.

FIG. 34 is an enlarged plan view showing a state in which the eject lever is rotated and the right end of the stopper edge comes to a position corresponding to the left end of the piece to be stopped;

FIG. 35 is an enlarged plan view showing a state in which the slider moves forward and the collar presses the rear half of the pressed piece of the eject lever.

FIG. 36 is an enlarged plan view showing a state where the eject lever is further rotated.

37 shows an operation of positioning the MD with respect to the mechanical chassis together with FIGS. 38 and 39. FIG. 37 is a cross-sectional view showing a state where the MD is inserted into the media holder.

FIG. 38 is a cross-sectional view showing a state immediately before the MD is completely inserted into the media holder and the positioning hole is inserted into the guide shaft.

FIG. 39 is a cross-sectional view showing a state where the MD is positioned with respect to the mechanical chassis.

40 shows an example of a method of forming a guide shaft together with FIGS. 41 to 44, and is an enlarged cross-sectional view showing a state before the main surface portion of the mechanical chassis is processed.

FIG. 41 is an enlarged cross-sectional view showing a state where drawing is performed subsequently to FIG. 40;

FIG. 42 is an enlarged cross-sectional view showing a state where drawing is performed subsequently to FIG. 41;

FIG. 43 is an enlarged cross-sectional view showing a state where drawing is performed subsequently to FIG. 42;

FIG. 44 is an enlarged cross-sectional view showing a state in which drawing is performed and a guide shaft is formed following FIG. 43;

FIG. 45 is an enlarged bottom view of the cover body.

46 shows an opening / closing mechanism of the cover together with FIGS. 47 to 50. FIG. 46 is an enlarged side view partially showing a cross section of a state where the cover is locked.

FIG. 47 is an enlarged side view partially showing a state in which the lock slider is moved rearward to unlock the cover body and the MD is raised to abut against the pressed edge of the cover body; .

FIG. 48 is an enlarged side view partially showing a state in which the lock slider moves further rearward and the MD further rises to press the pressed edge of the cover body to rotate the cover body; is there.

FIG. 49 is an enlarged side view partially showing a state in which the lock slider is further moved rearward, the pressed surface of the cover body is pressed by the lock pieces, and the cover body is further rotated.

FIG. 50 is an enlarged side view showing a state in which a part of the lock slider is further moved rearward and the cover body is completely opened, with a partial cross section.

51 shows the operation of each slider when the MD is ejected together with FIGS. 52 to 56, and FIG. 51 is a side view showing a state where the cover body is locked by the lock slider.

FIG. 52 is a side view showing a state where the lock slider and the slider have begun to move rearward by the operation of the eject knob.

FIG. 53 is a side view showing a state where the lock slider and the slider are further moved rearward and the cover body is slightly rotated.

FIG. 54 is a side view showing a state where the lock slider and the slider are moved to the rear moving end, the cover body is completely opened, and the MD projects from the apparatus.

FIG. 55 is a side view showing a state in which the operation of the eject knob is released and the lock slider and the relay slider are moved forward;

FIG. 56 is a side view showing a state where the MD is taken out and the cover is closed.

FIG. 57 shows the operation of each slider when an MD is inserted together with FIG. 58 and FIG. 59.
FIG. 6 is a side view showing a state where the cover is inserted and the cover is opened.

FIG. 58 is a side view showing a state in which the MD is inserted, the lock slider moves forward, and the front edge of the lock slider comes into contact with a temporary stop piece of the main chassis.

FIG. 59 is a side view showing a state where the cover body is rotated toward the closing position and the lock piece of the lock slider is pressed against the pressing surface thereof.

FIG. 60 shows a battery case together with FIGS. 61 to 67, and is an enlarged horizontal sectional view showing a state where the battery case is attached to a main chassis.

FIG. 61 is an enlarged exploded perspective view showing a lid, a fulcrum plate, and a part of a case main body.

FIG. 62 is an enlarged rear view showing a state where a lid is opened.

63 shows the operation of locking the lid in the closed position together with FIG. 64, and is an enlarged cross-sectional view showing a state where the lid main body is moving to the distal end side with respect to the hinge body.

FIG. 64 is an enlarged cross-sectional view showing a state where the lid body is slid with respect to the hinge body and the lid is locked at the closing position.

FIG. 65 is an enlarged exploded perspective view showing a terminal block and a part of a case main body.

FIG. 66 is a vertical sectional view showing a state in which the gum type battery is stored.

FIG. 67 is a vertical sectional view showing a state in which AA batteries are stored.

[Explanation of symbols]

Reference numeral 200: mechanical chassis (workpiece), 210: main surface (base), 211: bent edge, 215: opening, 23
0 ... Optical pickup (moving body), 233 ... Auxiliary guide rail (guide rail), 233a ... L-shaped bent part (base part), 233b ... Bend piece (bend part), 233c ... Top surface (sliding surface), 233d: Lower surface (sliding surface), 233e: Part (recess), 233f: Reinforcement unevenness (reinforcement rib), 2
35: Guided piece (engaging portion), 240: Auxiliary guide rail (guide rail), 241: L-shaped bent portion (base), 24
2 ... folded piece (bent section), 245 ... auxiliary guide rail (guide rail), 246 ... base section, 247 ... bent section, 2
47a: Arc surface (sliding surface), 247b: Arc surface (sliding surface), 248b: Part (recess)

Claims (16)

[Claims] 1. A guide rail which is engaged with an engaging portion of a moving body to guide the moving body when moving, wherein an opening of an opening formed in a base portion of a workpiece made of a sheet metal material. A guide rail comprising: a base portion formed integrally with a base portion at an edge; and a bent portion formed at a tip of the base portion at a predetermined angle with the base portion and formed integrally with the base portion. 2. The guide rail according to claim 1, wherein an R-shaped sliding surface having a cross-sectional shape is formed at an end edge of the bent portion. 3. The bent portion is bent so as to be orthogonal to the distal end of the base, the sliding surface is formed at both end edges of the bent portion, and the sliding surface on the bent portion is the distal end of the base. The guide rail according to claim 2, wherein the guide rail is formed so as to protrude from a surface of the base in a direction perpendicular to the guide rail. 4. The guide rail according to claim 1, wherein reinforcing ribs are formed on an opening edge and a base of the opening. 5. The guide rail according to claim 2, wherein reinforcing ribs are formed on an opening edge and a base of the opening. 6. The guide rail according to claim 3, wherein reinforcing ribs are formed on an opening edge and a base of the opening. 7. A method of forming a guide rail engaged with an engaging portion of a moving body to guide the moving body when the moving body moves, wherein an opening formed in a base portion of a workpiece made of a sheet metal material. Forming a base at the opening edge of the base integrally with the base, and forming a bent portion at the end of the base at a predetermined angle with the base by bending the base to be integrated with the base. And a method of forming a guide rail. 8. The guide rail forming method according to claim 7, further comprising a sliding surface forming step of forming an R-shaped sliding surface with a transverse cross section at an edge of the bent portion by press forming. Method. 9. The bent portion is bent so as to be orthogonal to the tip of the base portion. The sliding surface forming step includes forming the sliding surfaces on both ends of the bent portion and simultaneously forming the sliding surface on the bent portion side. 9. The guide rail according to claim 8, wherein a recess is formed at the tip of the base so as to project from the surface of the recess in a direction perpendicular to the tip of the base. Molding method. 10. A guide rail which is engaged with an engaging portion of a moving body and guides the moving body at the time of movement thereof, wherein the guide rail is formed on an outer edge of a base portion of a workpiece made of a sheet metal material. A base portion formed by bending a part of the edge and facing the base portion; and a bent portion formed at an end of the base portion at a predetermined angle with the base portion and integrally formed with the base portion. A guide rail, characterized in that: 11. The guide rail according to claim 10, wherein an R-shaped sliding surface having a cross-sectional shape is formed at an end edge of the bent portion. 12. The bent portion is bent so as to be orthogonal to the distal end of the base, the sliding surface is formed at both end edges of the bent portion, and the sliding surface on the bent portion is the distal end of the base. The guide rail according to claim 11, wherein the guide rail is formed so as to protrude from a surface of the base in a direction perpendicular to the guide rail. 13. A method of forming a guide rail engaged with an engaging portion of a moving body to guide the moving body when the moving body moves, wherein the guide rail is formed on an outer edge of a base portion of a workpiece made of a sheet metal material. Forming a bent portion by bending the tip of the bent edge at a predetermined angle to form a bent portion, and forming a base portion facing a base portion by bending a part of the bent edge And a method of forming a guide rail. 14. The guide rail forming method according to claim 13, further comprising a sliding surface forming step of forming an R-shaped sliding surface with a cross-sectional shape at an edge of the bent portion by press forming. Method. 15. The bent portion is bent so as to be orthogonal to the front end of the base portion. In the sliding surface forming step, the sliding surface is formed on both end edges of the bent portion, and at the same time, the sliding surface on the bent portion side is formed. 15. The guide rail according to claim 14, wherein a concave portion is formed at a distal end portion of the base portion so as to project from a surface of the concave portion in a direction orthogonal to the distal end portion of the base portion. Molding method. 16. The distance from a portion of the base where no concave portion is formed to the base is equal to or smaller than the distance from the top to the base on the sliding surface on the bent portion side. Item 16. A method for forming a guide rail according to Item 15.