JPS6314355A - magnetic recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention can be applied to different reel spacings and sizes.

A magnetic recording and reproducing device that can be selectively loaded with two types of small-sized magnetic tape cassettes, particularly a video tape recorder (hereinafter referred to as VTR) that can be selectively loaded with two types of magnetic tape cassettes of different standards, large and small. The present invention relates to magnetic recording and reproducing devices such as

[Prior art]

Currently, VTRs are broadly divided into two types: stationary type and camera-integrated type.The former type uses large cassettes for long-time recording and playback, while the latter type of handy type VTRs are smaller and lighter. A small cassette is used. Since the large cassette and the small cassette differ in size and reel spacing, the same VTR can record and reproduce only either the large cassette or the small cassette. Therefore, in order to record and play back a small cassette for an integrated camera on a VTR for a large cassette, a special adapter was required. However, since using an adapter is inconvenient to handle, VT allows you to use the same recording/playback device for large and small cassettes without an adapter.
The appearance of R was required.

A cassette-type VTR disclosed in Japanese Unexamined Patent Application Publication No. 40546/1983 allows the use of both large and small cassettes without the need for an adapter. The device seen in this prior application utilizes a pair of guide grooves with different spacing provided on the bottom surfaces of the large cassette and small cassette, and engages with the guide grooves by the insertion force used to insert the cassette into the cassette holder. By driving a pin, the interval between the reel stands was adjusted to the interval between the reels of the large and small cassettes.

[Problem that the invention seeks to solve]

However, in the above-mentioned prior application, since the reel stand is driven by the force of inserting the cassette into the cassette holder, the load for inserting the cassette is heavy (this makes it difficult to insert and attach the cassette smoothly and easily). This poses a major drawback in that it is difficult to use due to its size, which is a problem for general users who are accustomed to other devices in which cassettes can be inserted with a light touch.

Therefore, the technical problem to be solved by the present invention is to eliminate the above-mentioned conventional drawbacks, and its purpose is to adjust the reel stand spacing commensurate with the reel spacing of large and small cassettes without using manual force. Therefore, it is an object of the present invention to provide a magnetic recording/reproducing device in which insertion of a cassette is smooth and easy.

[Technical Means for Solving the Problems] The above object of the present invention is to provide a base housing provided with a movable pair of reel stands, and to adjust the distance between the reel stands to the size of the large cassette or the small cassette. an actuator for selectively moving the reel to a position corresponding to the reel interval; a sensor for detecting the insertion of the large cassette and/or the small cassette and providing a drive signal to the actuator; The large cassette holder is held in a base housing, and the large cassette holder is installed in a base housing and can be selected between a lowered position and a raised position where the large cassette can be inserted. A raised position in which the small cassette holder is held in the cassette holder and the small cassette can be inserted therein, a lowered position in which the small cassette is mounted in the large cassette holder, and a folded state in which the small cassette holder is folded onto the large cassette holder can be selected. and, when the small cassette is inserted into the small cassette holder, the small cassette holder is lowered into the large cassette holder, and then the large cassette holder is lowered into the base housing. Then, the reel of the small cassette is engaged with the reel stand located at a position corresponding to the reel interval, and when the large cassette is inserted into the large cassette holder, the small cassette holder is folded onto the large cassette holder. Achieved by a magnetic recording and reproducing device characterized in that, after folding, the large cassette holder is lowered into the base housing so that the reels of the large cassette are engaged with a reel stand located at a position corresponding to the reel spacing. be done.

[For production]

The magnetic recording/reproducing apparatus of the present invention takes a cassette insertion waiting state in which the large cassette holder and the small cassette holder are lifted up and down in this order on the base housing with the above-described configuration. Then, 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 pressed down, the large cassette holder is lowered and stored within the base housing. At this point, the insertion of the small cassette has been detected by the sensor, so the actuator that receives the signal from the sensor sets the paired reel stands in the base housing at a position that matches the reel spacing of the small cassette. Each reel of the small cassette housed in the large cassette holder along with the small cassette holder is attached to the reel stand of the base housing, completing the attachment of the small cassette.

On the other hand, in the cassette insertion waiting state, when a large cassette is inserted into the large cassette holder and the small cassette holder is pushed down, 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 insertion of the large cassette has been detected by the sensor, so the actuator that receives the signal from the sensor sets the paired reel stands in the base housing at a position that matches the reel spacing of the large cassette. Each reel of the large cassette housed in the large cassette holder is attached to the reel stand of the base housing, completing the attachment of the large cassette.

To take out the large and small cassettes, by releasing the locking mechanism that is locked when the cassette is inserted and pushed down, the entire apparatus is placed in the cassette insertion waiting state by the force of the spring, and the cassette can be easily taken out.

〔Example〕

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

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

FIG. 1 is a plan view showing the back side of two types of magnetic tape cassettes with different sizes and reel center spacings used in the cassette mounting mechanism of the magnetic recording and 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,
Reference numeral 6 indicates an opening through which the magnetic tape 5 is pulled out from the cassette by a tape guide member of the magnetic recording/reproducing apparatus, which will be described later. Reference numeral 7 indicates a reel of the small cassette 1, and reference numeral 8 indicates a reel of the large cassette 2. Said large and small cassettes 1,
In 2, the cassette positioning hole 3° 4 and the opening 6 for pulling out the magnetic tape are in the same position and size, but the center distance 1) between the reels 7 and 7 of the small cassette 1 is different from that of the large cassette 2. The center distance 12 between the reels 8 and 8, the distance y1 between the line segment connecting the cassette positioning holes 3 and 4 and the center of the reel 7 of the small cassette 1, and the cassette positioning hole 3
．． The distance y2 between the line segment connecting 4 and the center of the reel 8 of the large cassette 2 is different.

By the way, in a cassette type VTR, it is large.

By attaching the small cassette 1 or 2, the tape guide member enters the opening 6, and by moving this tape guide member out of the large and small cassettes 1.2, the magnetic tape 5 is caused to travel in a predetermined tape direction. It's supposed to be a road trip. -For this reason, in order to pull out the large and small cassettes 1.2 using the same tape guide member, the double force set 1.2 must be placed at the front position and the center position in the left and right direction of the double force sets 1 and 2 as shown in Figure 1. It is necessary to regulate them in the same position.

Therefore, as mentioned above, 7!1 and 12 and y, and y,
Since the cassettes are different, in order to be able to selectively use large and small cassettes on the same VTR, it is necessary to use the VTR (
The spacing and position of the pair of reel stands on the recording/reproducing device) side are as shown in the first figure, reel 7.7 or reel 8.
．． 8.

FIG. 2 is an explanatory side view showing the trajectory of the large and small cassettes 1 and 2 from when they are inserted into the cassette holder until they are mounted on the reel stand. In the same figure, l-a~
C shows the small cassette 1 at different positions, and 2-a and 2-b show the large cassettes at different positions. 9-a and 9-b indicate the reel stands 9 in different positions. (In addition, in each figure, the numbers indicated by - (hyphen) a... are added to distinguish when the member represented by the number takes a different position. )10
1) is a cassette positioning bin; 1) is a chassis forming a part of the base housing; 12 is a reel stand arm supporting the reel stand 9; 13 is a connecting arm for driving the reel stand arm 12; .60 indicates reel base regulating members A and B, and 68 indicates a reel base bin that engages with the reel base regulating members A and B.

The small cassette 1 is inserted into the small cassette holder (described later) at position 1-a by movement in the direction of arrow A, and while it is inserted into the small cassette holder, it is inserted into the large cassette holder (described later) at position 1-b. It is lowered until it is stored. (At this point, the sensor determines that it is the small cassette 1, and the line connecting the cassette positioning bins 10 and 10 (
(see FIG. 9) and the reel stand 9 is the above-mentioned yl. ) Furthermore, the small cassette 1-b descends together with the large cassette holder and is mounted on the reel stand 9-a in the base housing. On the other hand, the large cassette 2 is inserted into a large cassette holder, which will be described later, at the position 'la' by movement in the direction of arrow B. (At this point, it is determined that it 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 y2 as described above.) Thereafter, the large cassette 2 is mounted on the reel stand 9-b by the movement of the large cassette holder downward into the base housing. The release operation from the reel stand 9 is as follows:
The above operation is performed in reverse, and then the large and small cassettes 1.2
are taken out at the elevated positions 1-a and 2-a, respectively. Next, the above configuration operation will be further explained in order.

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 1) provided on the large cassette holder 25 described later; 5 is a small lock bin; 16 is a small holder arm A;
5 is implanted on the small holder arm A16 and 1. Small holder arm A16 is attached to pin 1 on the small cassette holder described later.
6a so as to be rotatable. 17 is a small synchronous shaft connected to the small holder arm A16.

18 is a small lock return spring, 19 is a spring receiver, and the spring 18 moves the small lock lever 14 in the direction of arrow C.
Pressing in the direction. 20 is small holder arm B12
1 is a small cassette presser, 22 is a small holder return spring, 23 is a small holder support member, and 24 is a small holder top cover.

25 is a large cassette holder, 26 is a large cassette presser, 27.28 is a large link arm A, B, 29.30 is a large cassette presser spring A, B, 31.32.33
are small cassette holders A and B.

At C, the small cassette holder A31 is rotatably held by the small cassette holder support 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). Place the cassette on the reel stand with the small cassette holders A and B in place.

C, 31, 32, 33 and the large cassette holder 25 are arranged in two stages, upper and lower, and the small cassette holders A, B,
C, 31, 32, 33 and large cassette holder 25,
The small cassette 1 and the large cassette 2 are each in an insertable state.

(However, insert either the small cassette 1 into the position 1-a and the large cassette 2 into the 2-a position.) When installing the small cassette 1 on the reel stand, the small cassette presser 21 After inserting the small cassette holder C33 in pressure contact with the small cassette holder C33 from the direction of the arrow A at the position 1-a, push down the holder top cover 24 to the position 1-b while maintaining the balance between the left and right sides of the cassette side using the small synchronous shaft 17. In some cases, the small lock pin 15 integrated with the small holder arm A16
However, after moving the small lock lever 14 against the biasing force of the small lock return spring 18, it is locked by the small lock lever 14, and the small cassette 1 is positioned in the large cassette holder 25. (The small holder return spring 22 operates in the opposite direction to the small cassette holders A, B, C, and 3 due to the counterclockwise biasing force of the small holder arm B20.)
It serves both as a return force in the direction of 1,32°33 and as a holding force for the small cassette 1. ) When the large cassette 2 is mounted on the reel stand, the large cassette 2 is inserted into the position 2-a from the direction of arrow B, and the large cassette 2 is pressed against the bottom surface of the large cassette holder 25 by the large cassette presser 26. (At this point, the large cassette detection sensor 69 provided on the large cassette holder 25 detects that the large cassette 2 has been inserted.) After this, the small lock pin 15 is placed on the holder until it is locked by the small lock lever 14. By pushing down M24, the small cassette holder C33 comes into contact with the top surface of the large cassette 2, and the small cassette holder A is removed.

B, C, 31, 32, 33 are folded onto the small cassette 1-b.

Therefore, small cassette 1 is small cassette holder A.

When it is in B, C, 31, 32, 33, the small cassette holder A, B,
C, 31, 32, and 33 move downward, and small lock pin 1
5 engages with the small lock lever 14 and stops, and becomes integrated with the large cassette holder 25 below. On the other hand, small cassette 1
When there is no cassette, the small cassette holders B, C, 32, and 33 are in a folded state on top of the large cassette 2. That is, if there is a small cassette 1, there are small cassette holders B and C.

32 and 33 are designed so that the small lock pin 15 is locked when the small cassette 1 reaches the height of the large cassette 2 without being folded.

Figures 5 and 6 are side views and partial front views showing the small cassette holders A, B, C, 31, 32, and 33 explained in Figure 3.4 in detail, and 23 is a small holder support. Element,
34, 35. 36 are holder columns A, B, C, 37,
38 and 39 are holder retaining rings; 40 is a small holder spacing; 41 is a small cassette width regulating member; 42 is a
The width regulating fixing member 43 indicates an opening spring stopping member.

Small holder 23 and small cassette holders A, B, and C.

31.32.33 are holder struts A, B, and C.

37, 38, and 39, it has a link structure, and the small cassette holders A, B, and 31.32 receive a force in the F direction by the small holder opening spring 40, and as a result,
A force in the F' direction acts on the holder support column B35, and the small cassette holder A.

B, C, 31, 32, and 33 are in an open state as shown by solid lines in FIG. When the large cassette 2 described in FIG. 4 is used, it is folded onto the large cassette 2 to be in the state shown by the dashed line in FIG. Also, the small cassette holders A and B explained in Fig. 3.4.

When the small cassette 1 is inserted into position 1-a in the direction of arrow A into C, 31, 32, 33, the small cassette width regulating member 41 fixed to the small cassette holder B, 32 as shown in FIG. The position of both sides of the small cassette 1 is regulated by this.

Figure 7 shows 1-b to 1 of the small cassette 1 shown in Figure 2.
26 is a large cassette presser, 27 is a large link arm A128 is a large link arm B , 54 is the large link arm C129,30
are large cassette presser springs A and B, which are suspended between the large link arm 28 and the large cassette presser 26.

44-a is a large lock bin implanted in the large link arm A2B, 45 is a large synchronous shaft integrally engaged with the large link arm A28, 46 is a holder support member, and 48 is a large lock member. The entire lock release member is configured such that the small lock member 14 and the large lock member 48 can be released against their respective biasing forces at both ends of the opening shape shown in the figure.

50 is a large holder return spring that is suspended between the large link arm A28 and the large cassette holder 25. 51 is a full 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 has been inserted into the small cassette holder described in Section 5.6, it has been completely lowered into the large cassette holder 25. -a
The state in which the small cassette holder is folded onto the large cassette 2 after being inserted into the position shown in FIG. 7 is shown by solid lines. When attaching large and small cassettes 1-b and 2-a to the reel stand, place them on the holder! ! 24 and the large lock pin 44-a is 4
The large cassettes 1 and 2 are pushed down until they are locked by the large holder locking member 48 at the position 4-b, and the large cassettes 1 and 2 are in the states lc and 2-b shown by the dashed 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 integrated operates in substantially the same manner as a conventionally known VTR.

To state it once again, the large link arm B28 rotates around the shaft 45. Further, the large link arm A27 is engaged with the large link arm B28 through a large lock pin, and descends while rotating around the pin. The lower end of the large link arm A27 engages with the large link arm C54, and the large link arm C54 rotates around the fixed pin at its lower end. Locking of these link mechanisms is achieved by the large locking pin 44 descending from the position 44-a to the position 44-b and engaging with the large locking member 48.

Also, when removing the large cassette 1.2 from the reel stand,
By pushing the full lock release member 49 in the C direction, the small lock lever 14 and the large lock member 48 are pushed, and the large and small cassettes 1°2 are moved upward by the large holder return spring 50 and the small holder return spring 22. Start.

FIG. 8 is a plan view of the large and small cassette holder, where 9 is a reel stand, 55 and 56 are large and small cassette lid lock release members, 57 is a small holder reel stand escape hole, and 58 is a large holder reel stand escape hole. Hole 59 is a reel lock release hole, and 69 is a large cassette detection sensor. The reel stand 9 always has the same reel center spacing 9-a as 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 it and determines that it is the large cassette 2. The large cassette holder 25 and the small cassette holders A, B,
Even when the small and large cassettes 1 and 2 are not present in C, 31, 32, and 33, the small cassette holder C33
The large cassette 2 is inserted into the large cassette holder 25 and the large cassette sensor 69
However, when it is detected, the reel stand 9 moves to the position 9-b indicated by the dashed line and is configured to correspond to the reel center spacing of the large cassette 2.

Figure 9.10 shows the large and small cassettes 1.2 shown in Figure 1.
9 is a plan view showing the adjustment operation of the reel stand center interval corresponding to different reel intervals, 9 is a reel stand, 10 is a cassette positioning bin, 12 is a reel stand arm, 13 is a connecting arm, 59° 60 are reel stand regulating members A and B
, 61 is a reel motor, 62 is an island moving gear, 63 is a reel motor holder, 64 is a reel motor biasing spring, 65 is a plunger, 66 is a solenoid, 6
Reference numeral 7 indicates a reel stand spring, and 70 indicates a reel stand pin relief hole. From FIG. 9, the normal solenoid 66 has the following:
The suction force in the D direction works and the plunger 65 and the connecting arm 13
are attracted to the positions 65-a and 13-a, respectively, and the reel stand arm 12 is urged to the position 12-a. The positioning of the reel stand 9 is carried out as shown in FIG.
It is regulated and held at position a. As a result, the center spacing of each reel stand 9 is l+, which is the position yl from the cassette positioning pin 10, which corresponds to the reel center spacing of the small cassette 1, and preparation for mounting the small cassette 1 on the reel stand 9 is completed. do. As explained in FIG. 8, when the large cassette 2 is inserted into the large cassette holder 25 and the large cassette detection sensor 69 detects the large cassette 2, the
As shown in the figure, the suction force of the solenoid 66 disappears,
The plunger 65 and the connecting arm 13 are moved in the E direction by the reel stand spring 67, and the reel stand arm 12 is rotated and biased to the position 12-b.

To position the reel stand 9, the reel stand pin 68 is held by the reel stand regulating member B60, as described in FIG.
It is regulated and held at the position 9-b. As a result, the center spacing of each reel stand 9 changes from E to l, and the position from the cassette positioning pin 10 changes from yl to y2, completing preparations for mounting the large cassette 2 onto the reel stand 9. After the small cassette 1 or the large cassette 2 is attached to the reel stand 9, the power of the reel motor 61 is transmitted to the reel stand 9 by the drive gear 62 by pressure contact with the reel motor biasing spring 64, and the reel stand 9 is rotated. Drive. 9 to 10 or vice versa, the reel stand 9 rotates about the fulcrum of the reel stand arm 12, so during the rotation operation, the reel motor 61 and the drive gear 62 are You will run away in that direction. Further, reference numeral 70 denotes an escape hole, which is provided to allow the reel stand bin 68 shown in FIG. 2 to escape when the reel stand arm 12 rotates.

〔Effect of the invention〕

As described above, according to the present invention, the reel stand is not moved using the insertion force of the cassette into the cassette holder as in the conventional case, but the reel stand is moved by using the force of inserting the cassette into the cassette holder.

The sensor determines whether the reel is small and the actuator changes the reel stand to large or large.
Since the cassette is moved to a position corresponding to the reel of a small cassette, the cassette insertion operation can be performed very easily and smoothly. In addition, since the cassette holder is lifted up to two levels to accommodate large and small cassettes and is ready for insertion, large and small cassettes are easily guided to the holders corresponding to their sizes.・It can be reliably positioned at a predetermined position within the holder, and the possibility of incorrect insertion can be eliminated as much as possible. Furthermore, despite the configuration in which the holder is lifted up into two stages during recording and playback and when not in use, it is possible to make it compact.

[Brief explanation of the drawing]

The drawings all relate to embodiments of the present invention; FIG. 1 is an explanatory diagram showing the difference between the large and small cassettes as seen from the back, and FIG.
3 and 4 are side views and main part front views for explaining the movement of the small cassette holder, and FIGS. 5 and 6 The figures are a side view and a front view of the main parts showing details of the small cassette holder, Fig. 7 is a side view to explain the operation of attaching large and small cassettes to the reel stand, and Fig. 8 is a side view showing the large cassette holder. Main part plan view, Figures 9 and 10
The figures are principal part plan views each showing the adjustment operation of the reel stand interval. 1...Small cassette, 2...Large cassette, 5...Magnetic tape, 7...Small cassette reel, 8...Large cassette reel, 9...Reel stand, 1)...・Chassis (base housing), 12... Reel stand arm, 1
3...Connection arm, 25...Large cassette holder,
31, 32. 33...Small cassette holder A, E',
, C, 66...Solenoid (actuator), 69
···sensor. Figure 7 1: Small force tt 2 two people 77-t 5: L parallel 4 to tape 0 7' small n 7t j ri++l and θ;ノ1＼yxtヅto2near＜n+watt: Reel 1L 11: Shear 12° Reel sweetness r7-4 1J: Mold 2t arm

Claims (3)

[Claims] (1) A magnetic recording/reproducing device capable of selectively mounting a large cassette and a small cassette with different external shapes and reel spacings includes a base housing provided with a movable pair of reel stands, and the reel stand. an actuator for selectively shifting the interval between the reels to a position corresponding to the reel interval of the large cassette or the small cassette; and detecting insertion of the large cassette and/or the small cassette and applying a drive signal to the actuator. and a large cassette holder held in the base housing so as to be able to move up and down, and a lower position mounted in the base housing and an upper position in which the large cassette can be inserted can be selected. and a small cassette holder held in the large cassette holder so as to be able to rise and fall and be folded, a raised position in which the small cassette can be inserted, a lowered position in which the small cassette is installed in the large cassette holder, and a lower position on the large cassette holder. and a folded state, wherein when the small cassette is inserted into the small cassette holder, after lowering the small cassette holder into the large cassette holder, the large cassette The holder is lowered into the base housing to engage the reel of the small cassette with the reel stand located at a position corresponding to the reel spacing, and when the large cassette is inserted into the large cassette holder, the small cassette After the holder is folded onto the large cassette holder, the large cassette holder is lowered into the base housing, and the reel of the large cassette is engaged with a reel stand located at a position corresponding to the reel spacing. A magnetic recording and reproducing device. (2) A patent characterized in that the small cassette holder is prevented from descending into the large cassette holder by a large cassette inserted into the large cassette holder, and assumes the folded state. Claim No. (1)
The magnetic recording and reproducing device described in . (3) By manually pushing down the small cassette holder, the small cassette holder is lowered or folded, and then the large cassette holder is pushed down. The magnetic recording and reproducing device described in .