JPS5954001A - Latch structure of door latch mechanism - Google Patents

Abstract

PURPOSE:To reduce overall thickness of a latch structure, by forming an outer circumference surface which has a displacement to a door pin with pressure toward its closing direction and a rubbing curved surface which has a round including a latch part that stabilizes the pin out of the outer circumferential surface. CONSTITUTION:A cone lift arm 17 presses a plate spring 13 to give replacement to a cone 5 toward a driving hub 4 and is adjacent to the inner side of the spring 13 with a base part 18 having the height approximately equal to a flat part 15. Both end parts of the arm 17 are slightly extended to the back side and supported turnably upwards and downwards at a supporting part 19 of a main body 1 via a plate spring 20 and a screw 21. Furthermore bent bars 22 are formed at both ends of the arm 17, and a groove part 23 is formed at the tip of the bar 22. At the same time, two load projected bars 24 which are adjacent to the spring 13 and bend downward over the spring 13 are formed at the part 18 of the arm 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a latch structure in a door latch mechanism.

Conventionally, in floppy disk drive devices, etc.
Many of them include a door latch mechanism, but when you look at the latch structure, many of them are formed to perform three-dimensional movement with the locking part of the door, and the structure is complicated and the overall device. There may also be a problem with making the device thinner.

The present invention has been made in view of these points, and an object of the present invention is to obtain a latch structure for a door latch mechanism that has a simple structure and can contribute to making the entire device thinner.

The present invention provides a system that includes an outer circumferential surface that is displaced by pressing the door pin in the closing direction, and a latch section that is located on the rotation support side of this outer circumferential surface and stabilizes the pin that has come off the outer circumferential surface. A simple two-dimensional structure consisting mainly of a sliding circumferential curve is sufficient, and the pin regulating portion prevents malfunction.

An embodiment of the present invention will be described based on the drawings.

This embodiment is applied to a door latch mechanism of a floppy disk drive device. First, to explain the basic configuration, a DC motor (2) is mounted on the center back side of the main body (1).
A shaft (3) is attached to this DC motor (2).
) is directly connected to the drive hub (4). A cone (5) faces the drive hub (4), and the drive hub (4) and cone (5) hold the magnetic disk (6) inserted from the media insertion slot (not shown). It is designed to be held and rotated. As is well known, the magnetic disk (6) consists of a square jacket and a thin flexible disk rotatably disposed within the jacket, with a central hole for gripping formed in the center. There is. At the back, a magnetic head (7) is mounted on a carriage (8) that performs reading and recording operations on a rotating magnetic disk (6) that is gripped and set, and is moved forward and backward in the radial direction by a guide shaft (9). is set to . θO is a step motor that moves this carriage (8), and is connected by a predetermined steel belt 0η. Further, (2) is a head drive mechanism that moves the magnetic head (7) toward and away from the magnetic disk (6).

Further, a leaf spring αJ is provided to support the cone (5). This leaf spring α] has a length that spans almost the entire width of the main body (1), is supported at both ends by bosses (2) formed on the main body (1), and is directed toward the drive knob (4). It is said that it can be freely displaced only in the approaching and separating directions. The shape of the drive hub (4) and cone (5) are located in the center when viewed from the front.
) parallel to and slightly elevated flat part αυ, and this flat part α
It has an inclined part α→ which becomes lower from V toward both ends. The cone (5) is attached to the lower surface of the center of this flat portion.

Next, press this leaf spring αj to release the cone (5) ft
A cone lift arm 0η is provided for displacement towards the drive hub (4). This cone lift arm αη is adjacent to the back of the leaf spring (to) and is approximately the same as its flat part αυ.
The base has a height of 0, and its both ends extend slightly to the rear, and a plate spring holder and a screw Q are attached to the support part of the main body (1).
It is rotatably supported in the vertical direction via a mesh. This cone lift arm α is formed by press processing, and is a bent piece (shaped piece) that is bent from near the end of the leaf spring and extends through both sides of the main body (1) toward the media insertion port. ) are formed on both sides. A groove (C) is formed at the tip of this bent piece. Furthermore, two load protrusions (C) are formed at the base α mark of the cone lift arm α, which protrude above the leaf spring 0], are bent downward, and are in contact with the leaf spring αj. The position of this load protrusion (c) is the leaf spring υ
6 to the sloped portion of the cone (5) is at a symmetrical position with the cone (5) as the center, and is at the center position when viewed in the width direction of the leaf spring (C).

Further, a cover (C) in which a media insertion port is formed is provided on the front side of the main body (1), and a door (C) for opening and closing the media insertion port is provided.

There are curved arms (A) near both ends of this door (C).
is fixed, and a hole is formed that engages with a stud (c) provided on the main body (1) at the lower end of the arm (a), making it rotatable. A pin (1) is provided in the middle of the arm (b), and is set to engage with the groove (c) of the cone lift arm α through a grooved collar 61). Also, the door (
A pin 02 is provided at the center of the inner surface of c).

A latch υ that latches the door (c) in the closed state via this pin 0→ is provided near the media insertion port. This latch 01 opens and closes the door frame in a so-called one-way manner, and as shown in Fig. 8, it is a support rotatably supported by a stud (c) provided on the main body (1). The hole (c) that will be the part, and the door (
Curved outer peripheral surface (G) and hole (to) and outer peripheral surface 0 that are pushed and displaced by the movement of 0 pins due to the closing action of c)
→The inner circumferential surface (
b), the pin 0 is formed in the center of this inner circumferential surface (b).
Prevent direct communication between the curved surface 01 for sliding contact that goes around the same plane including the latch part (to) to stabilize 2, and the inner circumferential surface (to) before and after the latch part (to) in the groove G'I). The latch part consists of a pin regulating part 0 to which protrudes in a different level toward the latch part] and a spring locking part (to) formed at the rear end and to which one end of the spring (a) is locked. Further, another stud ■ is erected near the stud (B), and an arm (A) is rotatably provided on this stud θ◆, and the magnet 01
The locking member @η is constituted by the above. That is,
A hook part (9) to which the other end of the spring (6) is locked is formed at one end of this arm (G), and a concave force transmitting part (H) is formed approximately in the center of the plunger of the magnet (3). The pin ■ provided in ■ is locked.

Here, the magnet (2) is turned ON to perform a suction operation in response to read/write operations, etc. by the magnetic head (7), and the plunger is provided with an E-ring. Note that the function is a stopper for the arm (A).

An eject mechanism is provided on the front side of the step motor 00. This eject mechanism is connected to the main body (
The main components are an eject plate that can be slid forward and backward along a guide part formed in 1) and a spring.
is locked between a stud 6 formed on the front side of the main body (1) and a locking piece bent upward in front of the eject plate (to). That is, when viewed from the side, the spring is stretched diagonally so that the side closer to the locking piece is higher. Further, a bent piece C1 is formed at the tip of the eject plate (toward), which is bent downward and engages the jacket of the magnetic disk (6). and,
A stepped portion 16→ is formed at a predetermined position of the guide portion to latch the end face ① of the eject plate. Furthermore, a tongue piece located on the eject plate 1e and protruding toward the front side is formed at the base 0 of the cone lift arm Qη, and the eject plate (to)
A leaf spring facing the tongue is fixed near the top of the locking piece. As shown in FIG. 5, an opening and a bent piece are formed in this leaf spring branch.

Further, an ejection prevention ring bent upward is formed at a predetermined position of the eject plate m. This ejection prevention single wheel is movable on its lower surface against the cone lift arm α force in the normal state, but when the cone lift arm α force is rotationally displaced, its base α9
Its height and position are set so that it locks on the inner end surface of the. Also, this base OF! An escape hole is formed in a part of I, corresponding to the position of the ejection prevention piece of the eject plate in the non-operating state.

In such a configuration, basically magnetic disks (6
) by inserting it into the specified position and closing the door (c), the magnetic disk (6) is attached to the drive hub (4) and cone (
5) It is gripped and set in between. First, when the magnetic disk (6) is inserted in the state shown in FIG. 6 (tL), its jacket is locked to the bending piece (to), and the eject plate M slides toward the back against the spring force, and reaches a predetermined position. When the magnetic disk (6) is inserted into the magnetic disk (6) position, the end surface ■ falls into the step O◇ and is latched, completing the insertion and setting of the magnetic disk (6). This is done by the component force of the diagonally tensioned spring (2).In this insertion and setting operation, the leaf spring ring provided on the eject plate (to) comes into contact with the tongue piece tL, as shown in Fig. 6 (4). (on the eject plate) will be bent in the opposite direction to the sliding direction. The deflection of this plate spring generates a downward force against the eject plate, and the eject plate M is reliably latched to the stepped portion 13◇. Therefore, the eject plate branch can be latched without any component force of the spring.

After inserting and setting the magnetic disk (6) like this, the door (
C) is closed as shown in Figure 3 (al) to Figure 3 (Entertainment).

Note that the dashed dotted line in FIG. 3 indicates the magnetic disk surface.

When the door (C) is closed, the pin (1) also rotates downward around the stud (C), so this pin (7)
The cone lift arm 0~, which has a grooved device at its tip that is engaged with the door (c), rotates downward around the leaf spring part in conjunction with the door (c). The leaf spring (C) is pressed and displaced downward by the downward force of the cone lift arm α, thereby lowering the cone (5) and gripping the magnetic disk (6).

By the way, regarding the movement of the leaf spring (0) due to the downward pressure of the cone lift arm α force, the leaf spring (0) is supported at both ends to prevent lateral movement or twisting, and the cone (5)
) The cone (5) attached to the flat part α9 is deformed by the load from the two load protrusions (c) at symmetrical positions around the center, so the cone (5) attached to the flat part α9 remains parallel to the drive hub (4). It will go down. Therefore, since the cone (5) often descends diagonally, the periphery of the central hole will not be damaged when gripping the magnetic disk (6). In the gripping state shown in FIG. It does not need to be provided. In addition, since the load point for the leaf spring ■ uses its slope 00, there is no need to make the cone lift arm αη higher than the leaf spring (to) as shown in Figure 4 (,), and the device This is advantageous for making the product thinner.

On the other hand, in the descending movement of the cone lift arm αη, its tongue slips on the leaf spring ■ and escapes into its opening as shown in Fig. 6 (o) and descends, so that the leaf spring ring is in a vertical state. Return to In addition, in the state shown in FIG. 6 (G), the base 0 ladder of the cone lift arm αη and the ejection prevention piece
is locked in the ejection prevention direction. Therefore, when the magnetic disk (6) is inserted and the door (C) is closed, it is assumed that the eject plate (υ) becomes detached from the stepped part O]) due to a sudden impact, etc. Also, since the ejection prevention ring formed on the eject plate (G) is locked to the base α peak, the eject plate branch does not perform the eject operation.

In other words, the bending piece (2) does not apply unnecessary force to the jacket of the magnetic disk (6), and therefore the rotating disk and its jacket do not come into frictional contact and are damaged. (6) can be protected. Regarding this ejection prevention piece, see Figure 6 (α
), when closing the door (c) without fully inserting the magnetic disk (6), the cone lift arm αη
Since the escape hole (2) is formed at the opposite position, it will not cause any trouble. On the other hand, if the magnetic disk (6) is not fully inserted and the door is closed, the cone lift arm αη will come into contact with the top of the ejection prevention wheel, making it impossible to set the magnetic disk (6).

After the read/write operation, by opening the door (c), the cone lift arm αη rises and returns to its original position, and the leaf spring αj also returns to its original position.
) is released. At the same time, eject freight (
Since the magnetic disk (6) is also detached from the stepped portion 0◇ and pulled in the ejecting direction by the spring (g), the magnetic disk (6) is ejected via the bent piece f4.

That is, from the state shown in FIG. 6(o), the tongue piece of the cone lift arm αη rises and comes into contact with the bent piece of the leaf spring ring. The eject plate branch is stably lifted (unlatched) from the stepped portion 6D via e4, and the eject operation begins.

Next, the latching operation of the door (C), that is, the one-way opening/closing operation pressure of the door (C) will be explained. First, Figure 7 shows when the door (C) begins to close and its bottle 02 comes into contact with the outer peripheral surface (to) of the latch G'3, and when the door (C) is pushed further, the bottle 0■ Press the latch (C), but this latch (C) is attached to the stud (B) at the rear (
Figure 7 (bottom) K cannot escape, so the outer circumferential surface (C) is 0.
It is possible to rotate as shown in Fig. 9 fa+ while remaining in contact with 2. Then, press the door (c) further to latch (to)
According to the rotation of , the bottle 0 → comes off the outer circumferential surface (G) and groove 0″I
) will be pushed in by the force of spring ■. When the door (c) is pushed as far as it can go, the bottle 02 hits the bottle regulating piece O■. Therefore, the bottle 02 that has entered the groove 0η often overruns the latch member 0, and when the door (c) is released, the bottle 02 is latched by the latch member as shown in FIG. 9 (4). It will stop. This figure 9 (
The condition shown in the illustration is the door (c) latch closed condition.

At this time, the spring (6) is connected to the stud (b) and the spring engaging part■
The latch (
(to) will be applied with a clockwise biasing force.

If you press the door (c) again in this latched state, bin 0 will be released.
→ also moves and disengages from the latch part (A) onto the bottle regulating part α, so the latch is released and the bottle 02 passes through the inner circumferential surface (2) under the biasing force of the spring (6) as shown in Fig. 9 ( As shown in , 1, the door (c) returns to its original position and the door (c) is opened.In this way, the opening and closing of the door (c) can be done with great ease of operation. The structure for this purpose is simple and inexpensive. In other words, the latch 03 can have a two-dimensional structure formed in a circle on the same plane like the sliding circumferential curved surface 00.

On the other hand, even in a latched state as shown in Figure 9 (diarrhea),
For example, FIG. 1.theta. shows the state during read/write operation by the magnetic head (7)K. At this time, magnet (c)
is energized and the plunger ring is attracted, so the bottle (2
)・The arm ring also becomes a stud due to the locking of the force transmission part (to)■
It rotates counterclockwise (Fig. 10) around , and its hook portion (9) is displaced to the right. Therefore, with respect to the straight line connecting the stud @ and the spring locking part self'3, the hook part O→ (therefore, the spring 0→) becomes the same or on the right side, and the urging force by the spring ■ is switched counterclockwise with respect to the latch 01. become. Even if you press the door (c) in this outside state, the pin will be 0.
2 only comes off from the latch part (to), the latch (to) does not rotate, and when you release your hand from the door (c), the pin 0 brocade will be latched to the latch part (a) again. Therefore, one
Even if the way system is adopted, troubles such as the door (c) being opened inadvertently will not occur by locking the door (c) with the locking member (of) during read/write operations.

As described above, the present invention stabilizes the outer circumferential surface of a door pin that is displaced when the pin is pressed in the closing direction, and the pin that is dislocated from the outer circumferential surface by being located on the rotation support side of the outer circumferential surface. Since the sliding contact curved surface that goes around the latch part and the pin regulating part are formed, a simple two-dimensional structure is required, which contributes to making the device thinner, and the bottle regulating part prevents problems such as overruns. This can prevent malfunctions.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a perspective view of the cone lift arm and door, and Fig. 3 (a) (+1 is a side view showing the interlocking relationship) Figure 4 (αl (-81) is a front view showing the entire gripping operation, Figure 5 is a perspective view of the eject plate, Figure 6 (al ~ (
c) is a side view showing the operation of the eject mechanism, Fig. 7 is a bottom view of the door latch mechanism, Fig. 8 is a perspective view of the latch, and Fig. 9 is a side view showing the operation of the eject mechanism.
Figures (α) to (cl) are bottom views showing the latch operation, and Figure 10 is the bottom view showing the locked state. 26...Door, 32...Pin, 33...Latch,
35... Hole (support part), 36... Outer peripheral surface, 39...
・Latch part, 40...Sliding contact curved surface, 41...Bin regulating part, 43...Spring locking part Applicant: Ricoh Co., Ltd. - Figure 3 ((1) (8) 6- Division U diagram (CL) (g)

Claims (1)

[Claims] A rotatably supported support part, an outer peripheral surface that is displaced by the pin of the door being pressed in the closing direction, and a pin that is located closer to the support part than the outer peripheral surface and has come off the outer peripheral surface. a sliding layer curved surface that goes around the latch portion for stabilization; a pin restriction portion that protrudes from the support portion side and faces the latch portion and restricts movement of the pin toward the latch portion; 1. A latch structure in a door latch mechanism, characterized in that it has a spring locking part to which a biasing spring is locked.