JPH10106082A - Recording medium cassette attachment / detachment mechanism - Google Patents

Abstract

(57) [Summary] In a pop-up type cassette attaching / detaching mechanism, the movement of a door body and the movement of a cassette holder in which the end of the cassette holder on the side of a cassette insertion opening faces the ejecting direction at the time of ejecting. . SOLUTION: A door body 3 is slidably supported with respect to a cassette holder 5, and the cassette insertion / removal opening 4 of the housing at a cassette mounting position of the cassette holder.
In the cassette attaching / detaching mechanism 1 having a door 8 provided so as to be separated from the housing and open the cassette insertion / removal opening in conjunction with the operation of the cassette holder to the eject position, An auxiliary arm 34 rotatably supported by the body and the other end rotatably supported by the door body is provided to connect the housing and the door body, and to perform a cassette attaching / detaching operation of the cassette holder. In conjunction with the above, the auxiliary arm is rotated, and the door body is slid with respect to the cassette holder. When the cassette holder comes to the eject position, the end of the cassette holder on the cassette insertion port 11 side also moves in the eject direction. To face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called pop-up type recording medium cassette attaching / detaching mechanism in which the end of a cassette holder on the side of a cassette insertion opening faces the ejecting direction at the time of ejecting, thereby smoothing the movement. .

[0002]

2. Description of the Related Art For example, in a video camera integrated with a video tape recorder, a so-called pop-up type recording medium cassette attaching / detaching mechanism is employed.

FIGS. 6 to 8 show an example of a conventional pop-up type recording medium cassette attaching / detaching mechanism a. The illustrated recording medium cassette attaching / detaching mechanism a uses two types of tape cassettes b and c. This is used in a video camera d that can perform the operation, that is, a so-called compatible type video cassette device.

[0004] A recording medium cassette attaching / detaching mechanism a is provided between a cassette mounting position inside the casing e and an ejecting position outside the casing e through a cassette insertion / removal opening f formed on a side surface of the casing e of the video camera d. Cassette holder g moving between
A pantograph-like link mechanism i for supporting the cassette holder g on a mechanical chassis h provided in the housing e;
i and a door j for closing the cassette insertion opening f when the cassette holder g is at the cassette mounting position.
And

The link mechanisms i, i are arranged along both side surfaces of the cassette holder g in the cassette width direction. Therefore, the cassette insertion opening f of the casing e is connected to the link mechanisms i, i. It is formed sufficiently larger than the cassette holder g so as not to interfere.

In the link mechanism i, the first link k and the second link l intersect, the intersection is connected rotatably, and the support shaft projects outward to be described later. The engagement axis m engages with the guide groove.

Further, a tension spring n is stretched between one end of the first link k and one end of the second link l of the link mechanism i, whereby the cassette holder g is always moved in the ejecting position direction. Is to be energized,
Further, when the cassette holder g is at the cassette mounting position, the state is held by lock means (not shown).

The door j is formed to be substantially the same as or slightly larger than the cassette insertion opening f, and is attached to the outer surface of the cassette holder g via a slide plate o.

The slide plate o is composed of a top plate p larger than the outer plate of the cassette holder g and leg pieces q and q bent from both side edges of the top plate p. .. Are formed, and guide grooves s, s, which are inclined with respect to the vertical direction, are formed in the leg pieces q, q.

Although not shown, the engaging shaft m is formed with an engaging groove slightly wider than the thickness of the leg q, and the engaging shaft m is inserted into the guide groove s of the leg q. In the engaged state, the edge of the guide groove s is fitted into the engagement groove, thereby preventing the guide shaft s from coming off the engagement shaft m.

The slide plate o is provided with support pins t, t,... Protruding from the outer plate of the cassette holder g in the slots r, r,. The slide plate o is slidably engaged with the cassette holder g in the vertical direction.
Further, the engagement shafts m, m of the link mechanisms i, i are engaged with the guide grooves s, s of the leg pieces q, q of the slide plate o, whereby
As the cassette holder g is attached and detached, the slide plate o is moved up and down. Therefore, the door i attached to the slide plate o is moved up and down with the movement of the cassette holder g. When the cassette holder g is at the cassette mounting position, the door i is placed in the cassette e of the housing e. When the insertion / removal opening f is closed and the cassette holder g is at the eject position, the door body i opens the cassette insertion / removal opening f and is lowered.
The end of the cassette holder g on the cassette insertion opening u side faces the ejecting direction.

When the tape cassette b or c is mounted on the video camera d, the cassette holder g is pulled out to the eject position, the recording medium cassette h is inserted into the cassette holder g, and the cassette holder g is manually operated. Is pushed into the housing e to move the cassette holder g to the cassette mounting position.

When removing the tape cassette b or c from the video camera d, the lock by the lock means is released by operating an eject button (not shown).
The cassette holder g is generated by the resilience of the resilient means (not shown)
Is projected to the side of the housing e and moved to the eject position.

Such a recording medium cassette attaching / detaching mechanism a
Is a cassette holder g of a particularly small tape cassette c.
Facilitates insertion into and removal from

That is, when a small tape cassette c is inserted into the cassette holder g, it is necessary to insert the tape cassette c to the depth in the insertion direction of the cassette holder g, and when the tape cassette c is taken out from the cassette holder g. Since it is necessary to hold the tape cassette c inserted deep into the cassette holder g, it is preferable that the end of the cassette holder g on the cassette insertion opening u side faces the ejecting direction. Such a recording medium cassette attaching / detaching mechanism a is suitable for a compatible type video camera d.

[0016]

In the pop-up type recording medium cassette attaching / detaching mechanism a, however, the vertical movement of the door j with respect to the cassette holder g is formed on the legs q, q. Is realized by the slidable engagement between the guide grooves s, s and the engagement shafts m, m of the link mechanisms i, i.
There was a problem that both movements were not smooth. That is, in order to reduce the play between the slide plate o and the door j, it is preferable to reduce the clearance between the guide grooves s, s and the engagement shafts m, m in order to reduce the clearance between them. Then, more and more friction increases and the movement becomes worse.

When the distance between the leg pieces q and q is different from the distance between the engaging grooves of the left and right engaging shafts m and m, the guide grooves s and s are engaged. There is also a problem that the precision of each component must be increased because the friction between the shafts m and m is further increased.

Therefore, the present invention relates to a pop-up type recording medium cassette attaching / detaching mechanism, in which the movement of the door body and the end of the cassette holder in which the end of the cassette holder on the cassette insertion opening side faces the ejecting direction at the time of ejecting. The task is to make the movement smooth.

[0019]

Accordingly, a recording medium cassette attaching / detaching mechanism according to the present invention has been developed in order to solve the above-mentioned problems.
The door body is slidably supported with respect to the cassette holder, and when the cassette holder is in the cassette mounting position, closes the cassette insertion / removal opening of the housing and interlocks with the operation of the cassette holder to the eject position. In a recording medium cassette attaching / detaching mechanism having a door provided so as to be separated from the housing and open the cassette insertion / removal opening, one end is rotatably supported by the housing and the other end is An auxiliary arm rotatably supported with respect to the door body is provided, the housing and the door body are connected, and the auxiliary arm is rotated in conjunction with the cassette attaching / detaching operation of the cassette holder, and the door body is moved. It is slid with respect to the cassette holder so that the end of the cassette holder near the cassette insertion port faces the eject direction when the cassette holder comes to the eject position. That.

Accordingly, the housing and the door are connected by the auxiliary arm, and the auxiliary arm is rotated in conjunction with the cassette attaching / detaching operation of the cassette holder, and the door is slid with respect to the cassette holder. In the eject state, the end of the cassette holder on the side of the cassette insertion opening faces the ejecting direction.Therefore, there are few sliding parts as in the related art, and therefore, the cassette attaching / detaching operation of the cassette holder and the vertical movement of the door body are performed. No extra friction is generated in the operation, and the dimensional accuracy of each component can be reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the recording medium cassette attaching / detaching mechanism according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 5 show an example of a pop-up type recording medium cassette attaching / detaching mechanism 1. FIG.

The recording medium cassette attaching / detaching mechanism 1 passes through a cassette insertion / removal opening 4 formed in the front side surface of the housing 3 of the video camera 2 to set a cassette mounting position inside the housing 3 and an ejecting position outside the housing 3. Cassette holder 5 that moves between
A pantograph-like link mechanism 7 for supporting the cassette holder 5 on a mechanical chassis 6 provided in the housing 3;
7 and a door 8 for closing the cassette insertion / removal opening 4 when the cassette holder 5 is in the cassette mounting position.
And a reinforcing member 9 for connecting the door 8 and the housing 3.

The upward direction in FIG. 1 is defined as the upper side, and the downward direction as the lower side. Also, the direction toward the diagonally lower right in the figure is the front side, the direction toward the diagonally upper left is the rear side, the direction toward the diagonally upper right is the right side, and the direction toward the diagonally lower left is the left side. I do. In the following description, when indicating the direction, the direction is assumed to be this direction.

The cassette holder 5 has a frame shape having an inner dimension slightly larger than the size of the recording medium cassette 10, and an upper opening thereof serves as a cassette insertion port 11 for inserting and removing the recording medium cassette 10. In addition, stopper pieces 12, 12 are formed on the lower edge of the inner plate 5a of the cassette holder 5 to prevent the recording medium cassette 10 inserted from the cassette insertion slot 11 from falling off from the side opposite to the cassette insertion slot 11. On the outer plate 5b of the cassette holder 5, two door support pins 13, 13 are provided so as to protrude forward in the left and right direction. Further, the left and right side plates 5c, 5c of the cassette holder 5 have The link support pins 14, 14,.
・ ・ Is projected outward.

In the housing 3, a space 15 based on the mechanical chassis 6 serves as a cassette mounting portion in which the recording medium cassette 10 is removably mounted.
The cassette positioning pin, tape guide, not shown
A reel base or the like is provided, and side wall plates 16, 16 are provided on the left and right sides of the mechanical chassis 6 with a space slightly larger than the width of the cassette holder 5 so as to protrude forward. .

The link mechanism 7 includes a first link 17
And a first link 17 and a second link 18 rotatably connected to each other at a central portion thereof. Such link mechanisms 7, 7 are disposed outside the side wall plates 16, 16, respectively. Is established.

The first link 17 is rotatably supported at its lower end by the tip of a lower link support pin 14 erected on the side plate 5c of the cassette holder 5, and has an upper end at its upper end. A guided pin 19 protruding inward is erected, and the guided pin 19 is slidably engaged with an arc-shaped guide groove 20 formed at the upper end of the side wall plate 16, and its stopper is prevented. It has been done. On the other hand, for example, a spring hook projection 21 projecting leftward is formed integrally with the upper end of the first link 17 on the left side.

The second link 18 has a support pin 22 projecting inward at the lower end thereof.
Is rotatably supported at the lower end of the side wall plate 16, and an arc-shaped guide groove 23 is formed at the upper end thereof. The upper link support pin 14 of the side plate 5c is formed in the guide groove 23. It is slidably engaged and is prevented from falling off. Further, a spring hook piece 24 projecting rearward is integrally formed at the lower end of the second link 18 on the side where the spring hook projection 21 is formed on the first link 17.

In the link mechanism 7, the first link 17 has the lower end of the cassette holder 5 as the center of rotation, and the second link 18 has the lower end of the side wall plate 16 as the center of rotation. And each upper end is a guide groove 2
As a result, the cassette holder 5 is moved in the front-rear direction (the direction in which the recording medium cassette is attached to and detached from the housing 3) while maintaining the attitude substantially parallel to the mechanical chassis 6. You. Such a movement of the cassette holder 5 is referred to as a cassette attaching / detaching operation, and a direction of this movement is referred to as a cassette attaching / detaching direction.

The amount of movement of the cassette holder 5 in the front-rear direction is regulated by the length of the guide grooves 20, 20, 23, 23, and the entire cassette holder 5 projects forward from the front surface of the housing 3 (see FIG. An eject position) and a position (cassette mounting position) in which the entirety is stored in the housing 3 (cassette mounting position).

In the link mechanism 7 on the left side, a spring hooking hole 21 formed at the tip of a spring hooking projection 21 of the first link 17 and a spring hooking piece 24 of the second link 18.
A tension spring 25 is stretched between the second link 1 and the upper end of the first link 17.
8 are biased so as to approach each other, and the lower end of the first link 17 and the upper end of the second link 18 are constantly biased forward, that is, in the direction in which the cassette holder 5 is ejected. .

When the cassette holder 5 is in the cassette mounting position, its state is held by a locking means (not shown). The unlocking by the locking means is performed by operating an eject button (not shown). Can be performed.

The door 8 is supported on the outer plate 5b of the cassette holder 5 via a slide plate 26 so as to be slidable in the vertical direction. That is, the slide plate 26 is formed one size smaller than the door body 8, and elongated holes 27, 27 extending in the vertical direction are formed at positions corresponding to the door body support pins 13, 13. Door support pin 1 corresponding to 27
3 and 13 are separately inserted to prevent slipping, and the door 8 is screwed to the slide plate 26 so that the door 8 slides vertically with respect to the cassette holder 5. It is movably supported.

The reinforcing member 9 is a plate-like member which is long in the left-right direction and has a width in the vertical direction slightly larger than the thickness in the front-rear direction of the cassette holder 5. It is rotatably supported at a position slightly above and at a position below the lower edge of the cassette insertion opening 4 of the housing 3.

That is, the upper support piece 2 having upper support holes penetrating in the left-right direction at both left and right ends of the upper edge of the reinforcing member 9.
8 and 28 are integrally formed so as to protrude upward, and lower support holes 29 and 29 are formed at the lower ends of the left and right end surfaces thereof, and open leftward or rightward.

A support shaft 30 extending in the left-right direction is located on the rear surface of the door body 8 and slightly above the lower edge thereof, with both ends thereof being substantially separated from the rear surface of the door body 8. Is supported by the back surface of the door body 8, the support shaft 30 is inserted into the upper support holes of the upper support pieces 28, 28, and the reinforcing member 9 is rotatably supported by the door body 8.

The housing 3 has a relatively shallow recess 3 opening forward along the lower edge of the cassette insertion / removal opening 4.
1 are formed, and left and right side walls 31a, 31a of the concave portion 31 are formed.
Support pins 32, 32 projecting into the recess 31 are provided at the lower end of the support member 29. The support pins 32, 32 are inserted into lower support holes 29, 29 on both left and right end surfaces of the reinforcing member 9,
The reinforcing member 9 is rotatably supported by the housing 3. Also,
The space between the left and right side walls 31a and 31a of the concave portion 31 is formed slightly larger than the left and right width of the reinforcing member 9, and when the reinforcing member 9 is supported by the support pins 32, its left and right end faces. The washer 33, 33 having good slipperiness is interposed between the reinforcing member 9 and the left and right side walls 31a, 31a. The rotation with respect to the body 3 becomes smooth.

As a result, the reinforcing member 9 is supported by the door 8 or the housing 3 at the upper end edge and the lower end edge thereof, thereby connecting the door 8 and the housing 3.
In the state where the cassette holder 5 comes to the cassette mounting position and the door body 8 closes the cassette insertion / removal opening 4,
The lower half is located in the recess 31, the outer surface thereof is flush with the outer surface of the housing 3, and the remaining part (upper half) is located inside the door body 8. (See FIG. 4).

Further, between the left and right edges of the cassette insertion opening 4 of the housing 3 and the left and right edges of the door body 8, auxiliary arms 34, 34 made of a sheet metal material for connecting the two are arranged. I have.

That is, the upper ends of the auxiliary arms 34, 34 are on the back surface of the door body 8, and are formed slightly below the left and right side edges and below the upper end edge.
The lower ends of the auxiliary arms 34, 34 are disposed at positions lower than the vertical center of the left and right side edges of the cassette insertion / removal opening 4, respectively. The mounting pieces 36 are rotatably supported via support shafts.

The length of the auxiliary arm 34 is substantially the same as the width of the reinforcing member 9 in the vertical direction, and the auxiliary arms 34, 34 are always parallel to the reinforcing member 9 when viewed from the left and right. It has been like that.

As a result, the door 8 is connected to the cassette holder 5.
It moves up and down in accordance with the attaching / detaching operation, and a stable opening / closing operation can be realized while always maintaining a posture parallel to the surface of the housing 3.

That is, when there is no auxiliary arm 34, 34,
Because the door 8 is connected to the housing 3 at the lower end thereof by the reinforcing member 9, the upper end of the door 8 is pushed when the door 8 is pressed forward with the movement of the cassette holder 5 in the ejecting direction. The part is deviated more forward than the lower end, and the parallelism of the door body 8 to the surface of the housing 3 is broken,
This generates friction in sliding the slide plate 26 with respect to the cassette holder 5 and makes the movement worse.

On the other hand, when the auxiliary arms 34, 34 are provided, the posture of the door 8 is always kept parallel to the housing 3 by the auxiliary arms 34, 34 and the reinforcing member 9. Therefore, the clearance between the cassette holder 5 and the slide plate 26 can always be kept constant, and friction does not occur in the sliding, and stable opening and closing of the door 8 can be realized.

When the recording medium cassette 10 is mounted on the video camera 2, the cassette holder 5 is pulled out to the eject position. At this time, the lock by the lock means (not shown) is released by operating the eject button, so that the cassette holder 5 is released.
Is moved to the eject position by the elastic force of the tension spring 25 of the link mechanism 7.

When the cassette holder 5 receives an external force from a direction other than the attaching / detaching direction in a state where the cassette holder 5 is at the eject position, if the external force or the component force is large in the left-right direction, the force is reduced. Reinforcing member 9
Are received by the left and right side walls 31a, 31a of the concave portion 31 through the washers 33, 33, and are very robust, and the reinforcing member 9 is formed of a plate-like member long in the left-right direction. , Its strength becomes even stronger.

Next, the recording medium cassette 10 is inserted into the cassette holder 5 from above, and the cassette holder 5 is manually pushed into the housing 3 to move the cassette holder 5 to the cassette mounting position.

When taking out the recording medium cassette 10 from the video camera 2, an eject button (not shown) is operated to release the lock by the locking means, and the cassette holder 5 is opened by the elastic force of the tension spring 25. The projection is performed by projecting to the front side of the body 3 and moving to the ejection position.

[0050]

As is apparent from the above description, according to the first aspect of the present invention, the door body is slidably supported on the cassette holder. A recording medium cassette attaching / detaching mechanism having a door provided so as to close the cassette insertion / removal opening and separate from the housing to open the cassette insertion / removal opening in conjunction with the operation of the cassette holder to the eject position. An auxiliary arm having one end rotatably supported by the housing and the other end rotatably supported by the door body, connecting the housing and the door body, The auxiliary arm is rotated in conjunction with the cassette mounting / removal operation of the holder, and the door body is slid with respect to the cassette holder so that the cassette can be moved when the cassette holder comes to the eject position. Since the end of the cassette on the side of the cassette insertion opening faces the ejecting direction, there are few sliding parts as in the conventional case, so that extra friction is required for the cassette attaching / detaching operation of the cassette holder and the vertical operation of the door body. Does not occur, and the dimensional accuracy of each part can be roughened.

According to the second aspect of the present invention, since the auxiliary arms are provided on both sides of the cassette holder, the movement of the door can be further stabilized.

In the embodiment shown in the drawings, the present invention is applied to a recording medium cassette attaching / detaching mechanism of a video camera. However, the present invention is not limited to this, and the present invention is not limited to this. The present invention can be applied to a recording medium cassette attaching / detaching mechanism in a recording / reproducing apparatus for a cassette in a disk.

In the above-described embodiment, the present invention is applied to a recording medium cassette attaching / detaching mechanism of a video camera using a recording medium cassette of one size. However, the present invention is similar to the conventional example. Needless to say, the present invention can also be applied to a recording medium cassette attaching / detaching mechanism in a so-called compatible type cassette device which can use cassettes of various sizes.

Furthermore, although a description has been given of a case where the cassette holder pops up while the cassette holder is kept parallel to the housing surface, the present invention is not limited to this, and the amount of protrusion of the cassette holder from the lower housing surface may be increased. Can be applied even if is smaller than the upper part. In short, when the door is opened, it is separated from the surface of the housing to the outside, and if the door can slide with respect to the cassette holder in parallel with the cassette insertion direction, it is applicable. it can.

In addition, the specific shapes and structures of the respective parts shown in the above embodiments are only examples of the embodiment of the present invention, and the technical scope of the present invention is thereby reduced. It should not be interpreted restrictively.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a recording medium cassette attaching / detaching mechanism of the present invention is applied to a video camera together with FIGS. 2 to 5, and FIG. 1 is a perspective view of the entire video camera.

FIG. 2 is an exploded perspective view showing a cassette holder and a door body separately.

FIG. 3 is a cross-sectional view showing a state where a cassette holder is at an eject position, with a part of a main part being cut away.

4 is a cross-sectional view showing a state where the cassette holder has been moved to a cassette mounting position from the state of FIG.

FIG. 5 is a front view of the door body in a cassette mounted state.

FIG. 6 shows an example of a conventional recording medium cassette attaching / detaching mechanism together with FIG. 7 and FIG. 8, and is a perspective view showing a state where a cassette holder is at an eject position.

FIG. 7 is an exploded perspective view showing a cassette holder and a door body separately.

FIG. 8 is a side view of the link mechanism in a state where a part of the housing is cut away and the cassette holder is at an eject position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Recording medium cassette attaching / detaching mechanism, 3 ... Housing, 4 ... Cassette insertion / removal opening, 5 ... Cassette holder, 8 ... Door body, 10
... Recording medium cassette, 11 ... Cassette insertion port, 34 ... Auxiliary arm

Claims (2)

[Claims] 1. A housing having a cassette insertion opening, a cassette holding a recording medium cassette and moving between a cassette mounting position in the housing and an ejection position outside the housing through the cassette insertion opening. A holder, when the cassette holder is at the cassette mounting position, closes the cassette insertion opening of the housing, separates from the housing in conjunction with the movement of the cassette holder to the eject position, and opens the cassette insertion opening. In the recording medium cassette attaching / detaching mechanism having a door body that is provided to be opened, the door body is slidably supported by the cassette holder, and the sliding direction is parallel to the insertion direction of the recording medium cassette into the cassette holder. And an end supported rotatably with respect to the housing and the other end rotatably supported with respect to the door body. An arm is provided to connect the housing and the door, and the auxiliary arm is turned in conjunction with a movement operation (hereinafter referred to as a "cassette mounting / removal operation") between the eject position of the cassette holder and the cassette device position. And the door body is slid with respect to the cassette holder so that the end of the cassette holder on the cassette insertion port side faces the ejecting direction when the cassette holder comes to the eject position. Media cassette attachment / detachment mechanism. 2. The recording medium cassette attaching / detaching mechanism according to claim 1, wherein the auxiliary arms are provided on both sides of the cassette holder.