JPH0695416B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a magnetic recording / reproducing apparatus capable of selectively mounting two kinds of magnetic tape cassettes, large and small, having different reel intervals and sizes, and particularly, for example, The present invention relates to a magnetic recording / reproducing apparatus such as a video tape recorder (hereinafter referred to as a VTR) in which two types of magnetic tape cassettes having different standards can be selectively mounted.

[Prior art]

Currently, VTRs are roughly classified into two types, stationary type and camera integrated type,
The former VTR uses a large large cassette for long-term recording and playback, and the latter handy-type VTR uses a small small cassette suitable for downsizing and weight saving. Since the large cassette and the small cassette have different sizes and reel intervals, only one of the large cassette and the small cassette can record / reproduce in the same VTR. For this reason, in order to record and reproduce the small cassette for the camera-integrated type with the VTR for the large cassette, a special adapter was absolutely necessary. However, handling with an adapter is inconvenient. Therefore, it has been required to develop a VTR that can be used with a large cassette and a small cassette without an adapter in the same recording / reproducing device.

One of the cassette type VTRs disclosed in Japanese Patent Laid-Open No. 60-40546 is one in which large and small cassettes can be used properly without this adapter. The device seen in this prior application utilizes a pair of guide grooves provided on the bottom surfaces of the large cassette and the small cassette and having different intervals and the like, and engages with the guide groove by an insertion force for inserting the cassette into the cassette holder. By driving the matching pins, the reel stand spacing is adjusted to the reel spacing of large and small cassettes.

[Problems to be solved by the invention]

However, in the above-mentioned prior application, since the reel base is driven by the insertion force of the cassette into the cassette holder, the cassette insertion load is large, and the cassette cannot be inserted / installed smoothly and lightly. There was a problem. This is a size problem for a general user who is accustomed to other devices in which cassette insertion is generally performed with a light touch, and has a serious drawback that so-called usability is poor.

Therefore, the technical problem to be solved by the present invention is to eliminate the above-mentioned conventional drawbacks, and the purpose thereof is to adjust the reel stand spacing corresponding to the reel spacings of large and small cassettes without relying on manual force. It is an object of the present invention to provide a magnetic recording / reproducing apparatus which can be carried out smoothly and in which insertion of a cassette is smooth.

[Technical means for solving problems]

The above-mentioned object of the present invention is to selectively move a base housing provided with a movable reel pair and a space between the reel bases to a position corresponding to the reel space of the large cassette or the small cassette. And a sensor for detecting the insertion of the large cassette and / or the small cassette to give a drive signal to the actuator, and a large cassette holder that is vertically held in the base housing. The descending position mounted inside and the ascending position where the large cassette can be inserted can be selected, and the small cassette holder that is held in the large cassette holder so as to be vertically movable and foldable, The upper position where the cassette can be inserted, the lower position where the cassette is installed in the large cassette holder, and the large cassette And a folding state in which the folding state is selectable on the holder, and with the small cassette inserted in the small cassette holder, the small cassette holder is lowered into the large cassette holder. After that, the large cassette holder is lowered into the base housing so that the reel of the small cassette is engaged with the reel stand located at a position corresponding to the reel interval, and the large cassette is inserted into the large cassette holder. Then
After folding the small cassette holder on the large cassette holder, the large cassette holder is lowered into the base housing so that the reel of the large cassette is engaged with the reel stand located at a position corresponding to the reel interval. Is achieved by a magnetic recording / reproducing apparatus.

[Work]

The magnetic recording / reproducing apparatus of the present invention is in the cassette insertion expecting state in which the large cassette holder and the small cassette holder are lifted up and down in this order on the base housing by the above-mentioned configuration. When the small cassette is inserted into the small cassette holder and the small cassette holder is pushed down, the small cassette holder descends into the large cassette holder together with the small cassette. Next, when the large cassette holder is pushed down, the large cassette holder is lowered and stored in the base housing. At this point in time, the sensor has detected the insertion of the small cassette, so the actuator receiving the signal from the sensor sets the paired reel stand in the base housing to a position that matches the reel spacing of the small cassette. Each reel of the small cassette housed in the large cassette holder together with the small cassette holder is mounted on the reel stand of the base housing, and the mounting of the small cassette is completed.

On the other hand, when the large cassette is inserted into the large cassette holder and the small cassette holder is pushed down in the cassette insertion standby state, the empty small cassette holder is folded onto the large cassette holder. Then, when the large cassette holder is pushed down from this state, the large cassette holder is lowered and stored in the base housing together with the large cassette.
At this point, the sensor has detected the insertion of the large cassette, so the actuator receiving the signal from the sensor sets the paired reel stand in the base housing to a position corresponding to the reel interval of the large cassette. The reels of the large cassette stored in the large cassette holder are mounted on the reel stand of the base housing, and the mounting of the large cassette is completed.

The large and small cassettes are taken out by releasing the locking mechanism that is locked during the cassette mounting and pushing down operation, and the entire device is brought into the aforementioned cassette insertion expected state by the spring force, so that the cassette can be taken out easily.

〔Example〕

 Hereinafter, the present invention will be described with reference to an illustrated embodiment.

First, a large cassette and a small cassette having different sizes and different reel intervals used in the cassette type VTR of this embodiment will be described with reference to FIG.

FIG. 1 is a plan view showing the back side of two types of magnetic tape cassettes having different sizes and reel center intervals used in the cassette device mechanism of the magnetic recording / reproducing apparatus according to the present invention. In the figure, 1 is a small cassette, 2 is a large cassette, 3 and 4 are cassette positioning holes, 5 is a magnetic tape,
6 is an opening for pulling out the magnetic tape 5 from the cassette by a tape guide member of the magnetic recording / reproducing apparatus described later, 7 is a reel of the small cassette 1, 8 is a large cassette 2
Each of the reels is shown. The large and small cassettes 1,
In 2, the cassette positioning holes 3 and 4 and the opening 6 for pulling out the magnetic tape have a common position and size,
The center interval l ₁ between the reels 7 and 7 of the small cassette 1, the center interval l ₂ between the reels 8 and 8 of the large cassette ₂ , and the line segment connecting the cassette positioning holes 3 and 4 and the center of the reel 7 of the small cassette 1. distance y ₁ up, and the spacing y ₂ to the center of the reel 8 of the line segment and the large cassette 2 connecting the cassette positioning holes 3 and 4, different from each other.

By the way, in the cassette type VTR, the tape guide member is inserted into the opening 6 by mounting the large or small cassette 1 or 2 and the tape guide member is moved to the outside of the large or small cassette 1 or 2. By doing so, the magnetic tape 5 is loaded onto a predetermined tape running path. For this reason, in order to pull out the large and small cassettes 1 and 2 with the same tape guide member, both cassettes 1 and 2 should have the same front and left center positions as shown in FIG. It is necessary to regulate the position. Therefore, since l ₁ and l ₂ and y ₁ and y ₂ are different as described above, in order to selectively use large and small cassettes with the same VTR, as described later, VTR (magnetic The distance and position of the pair of reel stands on the recording / reproducing apparatus side are set to the reels 7 and 7 shown in FIG.
Or, it is made to correspond to the reels 8,8.

FIG. 2 is an explanatory view seen from the side, showing the loci of the large and small cassettes 1 and 2 from being inserted into the cassette holder to being mounted on the reel stand. In the figure, 1-a to c
Replaces the small cassette 1 at different positions with 2-a and 2
-B shows the large cassettes at different positions. 9-a and 9-b show the reel stands 9 at different positions. (Note that the numbers in each figure
It is to be understood that what is indicated by (hyphen) a ... Is added to distinguish the members represented by the numbers when the members take different positions. ) 10 is a cassette positioning pin, 11 is a chassis forming a part of the base housing, 12 is a reel base arm that supports the reel base 9, 13 is a connecting arm for driving the reel base arm 12, Reference numerals 59 and 60 denote reel base regulating members A and B, and 68 denotes reel base pins engaging with the reel base regulating members A and B.

The small cassette 1 is inserted into the small cassette holder, which will be described later, at the position 1-a by the operation in the direction of the arrow A, and remains in the state of being inserted in the small cassette holder, the position 1-b in the large cassette holder, which will be described later. It is lowered and stored. (At this point, the sensor determines that it is a small cassette 1, and the line segment connecting the cassette positioning pins 10 and 10 (9th
(See the drawing) and the reel base 9 is at the interval y ₁ . )
Further, the small cassette 1-b descends together with the large cassette holder and is mounted on the reel base 9-a in the base housing. On the other hand, the large cassette 2 is inserted into the large cassette holder, which will be described later, at the position 2-a by the operation in the arrow B direction. (At this point, it is determined that the cassette 2 is the large cassette 2, and the distance between the line segment connecting the cassette positioning pins 10 and 10 (see FIG. 10) and the reel stand 9-b becomes y ₂ described above.) After that, the large cassette 2 is moved to the reel housing 9-b by the descending operation of the large cassette holder into the base housing.
Be attached to. The removal operation from the reel stand 9 is carried out in the opposite manner to that described above, and thereafter the large and small cassettes 1 and 2 are taken out at the elevated positions 1-a and 2-a, respectively. Next, the above-mentioned operation will be further described step by step.

3 and 4 are a side view and a partial front view showing the operation of the small cassette holder. 14 is a small lock lever provided on a large cassette holder 25 described later, 15 is a small lock pin, 16
Is a small holder arm A, and the small lock pin 15 is planted on a small holder arm A16, and the small holder arm A16 is rotatably held by a pin 16a on a small cassette holder described later. 17 is a small holder arm A1 with a small synchronous shaft
Concatenated with 6. 18 is a small lock return spring, 1
9 is a spring receiver, and the spring 18 presses the small lock lever 14 in the direction of arrow C. 20 is a small holder arm B, 21 is a small cassette holder, 22 is a small holder return spring, 23 is a small holder support member, and 24 is a small holder upper lid. 25 is a large cassette holder, 26 is a large cassette holder, 27 and 28 are large link arms A, B, 29, 30
The large cassette holding springs A, B, 31, 32, 33 are small cassette holders A, B, C. The small cassette holder A31 is rotatably held by the small cassette holder supporting member 23, and the small cassette holder B32. Is rotatably connected to the small cassette holder A31 and the small cassette holder C33. 69 is a large cassette detection sensor (not shown). In the state before the cassette is mounted on the reel stand, the small cassette holders A, B, C, 31, 32, 33 and the large cassette holder 25 are arranged in upper and lower two stages, and the small cassette holders A, B, C, 31,32,33
1 small cassette in each of the large cassette holder 25 and the large cassette holder 25.
The large cassette 2 is ready for insertion. (However, the small cassette 1 has the large cassette 2 at the position 1-a.
Inserts either cassette at the 2-a position. ) When mounting the small cassette 1 on the reel stand, insert the small cassette holder 21 into the small cassette holder C33 with the small cassette presser 21 in the position 1-a from the direction of the arrow A, and then to the position 1-b. By pushing down the holder upper lid 24 while keeping the left and right sides of the cassette balanced, the small lock pin 15 integrated with the small holder arm A16 resists the urging force of the small lock return spring 18 and the small lock lever 14
After moving, it is locked by the small lock lever 14,
The small cassette 1 is located in the large cassette holder 25.
(Small holder return spring 22 is small holder arm B2
The counterclockwise urging force of 0 serves as the reverse operation, ie, the restoring force in the direction of the small cassette holders A, B, C, 31, 32, 33 and the pressing force of the small cassette 1. When the large cassette 2 is mounted on the reel stand, the large cassette 2 is inserted at the position 2-a from the direction of arrow B, and the large cassette holder 26 presses the large cassette 2 on the bottom surface of the large cassette holder 25. (At this point, the insertion of the large cassette 2 is detected by the large cassette detection sensor 69 provided in the large cassette holder 25.) After this, the small lock pin 15 is closed by the small lock lever 14 until the holder upper lid 24 is closed. By pushing down, the small cassette holder C33 comes into contact with the upper surface of the large cassette 2, and the small cassette holders A, B, C, 31, 32, 33
Is folded onto the small cassette 1-b.

By the way, the small cassette 1 is a small cassette holder A, B, C, 31,3
When it is in 2, 33, the small cassette holder A, B, C, 31, 32, 33 moves downward together with the small cassette 1 by the link mechanism consisting of the small holder arm A16 and the small holder arm B20, and the small lock pin 15 moves. It engages with the small lock lever 14 and stops, and becomes integral with the large cassette holder 25 below. On the other hand, when the small cassette 1 is not present, the small cassette holders B, C, 32, 33 are folded over the large cassette 2. That is, when the small cassette 1 is present, the small cassette holders B, C, 32 and 33 are not folded and the small lock pin 15 is locked when the small cassette 1 comes to the height of the large cassette 2.

Figures 5 and 6 show the small cassette holders A and B described in Figures 3 and 4.
A side view showing C, 31, 32, 33 in detail and a partial front view, 23 is a small holder support member, 34, 35, 36 are holder columns A, B, C, 37, 38.39, Holder retaining ring, 40 is small holder opening spelling, 41 is small cassette width regulating member, 42
Is a width regulation fixing member, and 43 is an opening spring stopper member. Small holder 23 and small cassette holder A, B, C, 31,32,33
Has a link structure with holder columns A, B, C, 37, 38, 39, and the small holder opening springs 40 cause the small cassette holders A, B, 31, 32 to receive a force in the F direction. As a result, a force in the F'direction acts on the holder strut B35, and the small cassette holders A, B, C, 31, 32, 33 are in the open state as shown by the solid line in FIG. When the large cassette 2 described with reference to FIG. 4 is used, the large cassette 2 is folded onto the large cassette 2 to be in the state shown by the alternate long and short dash line in FIG. When the small cassette 1 is inserted into the small cassette holder A, B, C, 31, 32, 33 described in FIGS. 3 and 4 in the direction of arrow A at the position 1-a, as shown in FIG. The position of both sides of the small cassette 1 is regulated by the small cassette width regulating member 41 fixed to the small cassette holders B and 32.

FIG. 7 shows 1-b to 1 of the small cassette 1 shown in FIG.
-C, and a side view showing the mounting operation of the small cassette 2 from 2-a to 2-b on the reel stand, 26 is a large cassette presser, 27 is a large link arm A, 28 is a large link Arms B and 54 are large link arms C, 29 and 30, and large cassette holding springs A and B are suspended between large link arm 28 and large cassette holding member 26. 44-a is a large lock pin implanted in the large link arm A28, 45 is a large synchronous shaft integrally engaged with the large link arm A28, 46 is a holder supporting member, 48 is a large locking member, and 49 is a large locking member. All the lock releasing members can release the small locking member 14 and the large locking member 48 at their both ends in a U-shape in the figure against the biasing forces of the locking members. A large holder return spring 50 is suspended between the large link arm A28 and the large cassette holder 25. Reference numeral 51 is an all-lock return spelling, 52 is a large lock return spring, 53 is a chassis, and 69 is a large cassette detection sensor. After the small cassette 1 is inserted into the small cassette holder described in the fifth and sixth items, the state 1-c in which the small cassette 1 has been completely lowered into the large cassette holder 25 or the large cassette 2 is in the large cassette holder 25 After the small cassette holder is inserted into the position a, the large cassette 2
The state of being folded up is shown by the solid line in FIG. When mounting the large and small cassettes 1-b, 2-a on the reel stand, further push down the holder upper lid 24 until the large lock pin 44-a is locked by the large holder locking member 48 at the position of 44-b, and press the large lock. The cassettes 1 and 2 are in the states 1-c and 2-b shown by the alternate long and short dash line, and the mounting on the reel stand is completed.

That is, the mechanism after the small cassette holder and the large cassette holder are united with each other performs substantially the same operation as a conventionally known VTR. Once again, the large link arm B28 rotates about the shaft 45. Further, the large link arm A27 is engaged with the large link arm B28 by a large lock pin, and descends while rotating around the pin. The lower end of the large link arm A27 is
The large link arm C54 rotates about the fixing pin at the lower end thereof. The lock of these link mechanisms is achieved by the large lock pin 44 descending from the position 44-a to the position 44-b and engaging with the large lock member 48.

When removing the large cassettes 1 and 2 from the reel stand, the small lock lever 14 and the large lock member 48 are pushed by pushing the all lock release members 49 in the C direction, and the large holder return springs 50 and the small holder return members are returned. The spring 22 causes the large and small cassettes 1 and 2 to start moving upward.

FIG. 8 is a plan view of the large and small cassette holders.
Is a reel stand, 55 and 56 are large and small cassette lock release members, 57 is a small holder reel stand escape hole, 58 is a large holder reel stand escape hole, 59 is a reel lock release hole, 69
Shows a large cassette detection sensor. The reel base 9 is always the same as the reel center interval of the small cassette 1 except when the large cassette 2 is inserted into the large cassette holder 25 and the large cassette detection sensor 69 detects that the large cassette 2 is 9-a. In the position of the large cassette holder
25, and even if the small cassette holders A, B, C, 31, 32, and 33 descend without the large and small cassettes 1 and 2 in the small cassette holders A, B, C, 31, 32, and 33, the small holder reel stand escapes without contacting the small cassette holder C33. The large cassette 2 is inserted into the large cassette holder 25 when the large cassette 2 is inserted into the hole 57, and when the large cassette know sensor 69 detects it, it is indicated by a chain line 9-b.
The reel base 9 is moved to the position of and is configured so as to correspond to the reel center interval of the large cassette 2.

FIGS. 9 and 10 are plan views showing the adjusting operation of the reel base center interval corresponding to different reel intervals in the large and small cassettes 1 and 2 shown in FIG. 1, 9 is a reel base, and 10 is a cassette. Positioning pins, 12 is a reel base arm, 13 is a connecting arm, 59 and 60 are reel base regulating members A and B, 61 is a reel motor, 62 is a drive gear, 63 is a reel motor holder, 64
Is a reel motor biasing spring, 65 is a plunger,
66 is a solenoid, 67 is a reel stand spring, 70 is
The reel stand pin escape hole is shown. As shown in FIG. 9, the normal solenoid 66 is attracted in the D direction to attract the plunger 65 and the connecting arm 13 to the positions 65-a and 13-a, respectively, and the reel base arm 12 is moved to the position 12-a. Be energized.
As shown in FIG. 2, the reel base 9 is positioned by the reel base pins 68 held by the reel base regulating member A59 as shown in FIG.
Is held at the position. As a result, each reel stand 9
The center interval of is ₁ and from the cassette positioning pin 10
The position becomes y ₁ , which corresponds to the reel center interval of the small cassette 1, and the preparation for mounting the small cassette 1 on the reel stand 9 is completed. As described in FIG. 8, when the large cassette 2 is inserted into the large cassette holder 25 and the large cassette 2 is detected by the large cassette detection sensor 69, as shown in FIG.
The attraction force of the solenoid 66 disappears and the reel base spring 67 causes the plunger 65 and the connecting arm 13 to move in the E direction to rotate and urge the reel base arm 12 to the position 12-b. As for the positioning of the reel base 9, the reel base pin 68 is held by the reel base regulating member B60 and regulated and held at the position 9-b, as in the description of FIG. As a result, the center spacing of each reel base 9 is changed from l ₁ to l ₂ , and the position from the cassette positioning pin 10 is changed from y ₁ to y ₂ , and the preparation for mounting the large cassette 2 on the reel base 9 is completed. After the small cassette 1 or the large cassette 2 is mounted on the reel base 9, the drive gear 62 of the power of the reel motor 61 presses the reel motor 9 with the reel motor urging spring 64 to transmit the power to the reel base 9.
To rotate. 9 to 10 or the reverse operation, the reel base 9 rotates with the fulcrum of the reel base arm 12 as a reference, so that the reel motor 61 and the drive gear 62 are rotated by F during the rotation operation. I will run away in the direction. Also, 70
Is an escape hole provided to escape the reel base pin 68 shown in FIG. 2 when the reel base arm 12 rotates.

〔The invention's effect〕

As described above, according to the present invention, the reel base is not moved by utilizing the insertion force of the cassette into the cassette holder as in the conventional case, but the size of the cassette is discriminated by the sensor and the reel base is actuated by the actuator. Since the cassette is moved to a position corresponding to the reels of the large and small cassettes, the cassette can be inserted easily and smoothly. In addition, 2 cassette holders are available for large and small cassettes.
Since it is lifted up to the stage to wait for insertion, the large and small cassettes can be easily and reliably positioned at the predetermined positions in the holder by being guided by the holders corresponding to their respective sizes. Fear can be eliminated as much as possible. In addition, it is possible to make the shape compact even though the holder is lifted up in two stages at the time of recording / reproducing and when not in use.

[Brief description of drawings]

The drawings are all related to the embodiments of the present invention. FIG. 1 is an explanatory view seen from the back side showing the difference between large and small cassettes, and FIG.
FIGS. 3 and 4 are side views for explaining the movement of the small cassette and front views of main parts, FIGS. 5 and 6 for explaining the movement of the small cassette when the mounting operation of the small cassette is performed. The figure is a side view showing the details of the small cassette holder and the front view of the main part. Fig. 7 is a side view for explaining the mounting operation of the large and small cassettes on the reel base. Fig. 8 is the large cassette holder. FIG. 9 is a plan view of a main part of FIG. 9, and FIG. 9 and FIG. 1 ... Small cassette, 2 ... Large cassette, 5 ... Magnetic tape, 7 ... Small cassette reel, 8 ... Large cassette reel, 9 ... Reel stand, 11 ... Chassis (base housing), 12 ...... Reel stand arm, 13 ...... Coupling arm, 25
…… Large cassette holder, 31,32,33 …… Small cassette holder A, B, C, 66 …… Solenoid (actuator), 69
……sensor.

Front page continuation (72) Inventor Noriaki Masuda No. 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Home Appliances Research Laboratory, Hitachi, Ltd. (56) Reference JP-A-60-111360 (JP, A) JP-A-60- 109052 (JP, A) JP-A-60-40545 (JP, A)

Claims (3)

[Claims] 1. A magnetic recording / reproducing apparatus capable of selectively mounting a large cassette and a small cassette having different outer shapes and reel intervals, a base housing provided with a movable reel base, and the reel. An actuator for selectively moving the space between the stands to a position corresponding to the reel space of the large cassette or the small cassette, and detecting the insertion of the large cassette and / or the small cassette to output a drive signal to the actuator. A sensor for giving, a large cassette holder that is held in the base housing so as to be able to move up and down, and a lowered position that is installed in the base housing and a raised position that allows the large cassette to be inserted can be selected. And a small cassette holder that is held in the large cassette holder so that it can be raised and lowered and folded freely. A small cassette holder, a raised position at which a shoe can be inserted, a lowered position mounted in the large cassette holder, and a folding state in which the cassette is folded on the large cassette holder. When the small cassette is inserted in the inside, the small cassette holder is lowered into the large cassette holder, then the large cassette holder is lowered into the base housing, and the reel of the small cassette is moved to a position corresponding to the reel interval. With the large cassette inserted into the large cassette holder, the small cassette holder is folded onto the large cassette holder and then the large cassette holder is lowered into the base housing. Characterized in that the reel of the large cassette is engaged with the reel stand located at a position corresponding to the reel interval. Magnetic recording and reproducing apparatus for. 2. The small cassette holder is set in the folded state by being prevented from descending into the large cassette holder by the large cassette inserted in the large cassette holder. A magnetic recording / reproducing apparatus according to claim (1). 3. The small cassette holder is lowered or folded by manually pushing down the small cassette holder, after which the large cassette holder is pushed down. ) The magnetic recording / reproducing apparatus according to the item.