JPH0441881A - Magnet latch of sliding body - Google Patents

Abstract

PURPOSE:To gently release the magnet latch of an oscillating body with a small force by providing a first magnetic piece on one end side of the oscillating body having the other end pivotally supported in such a manner as to be capable of oscillating, and providing an attracting/separating lever for separating a second magnetic piece attracting the first magnetic piece there-from. CONSTITUTION:An oscillating body 200 is supported on a shaft 204 provided on a frame 202 in such a manner as to be capable of oscillating at a determined angle, a magnet 206 is installed to the contact part with a body side, and the corresponding contact part 208 on the body side is formed of a magnetic body. An attracting/separating lever 210 is mounted on the side end surface of the oscillating body 200, a nob 214 and a cam 216 are supported on a lever shaft 212 in such a manner as to be integrally rotatable by a determined quantity, and one end side of the cam 216 is energized by a spring 218. Then, a sliding channel 216a is formed in the center part of the cam 216, and a stopper 220 is provided. The nob 214 is clockwise rotated to rotate the cam 216, the magnet 206 is separated from a magnetic plate 208, and the oscillating body 200 is oscillated at a desired angle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic latch for a rocking body that holds various doors, opening/closing lids, etc. in a closed position, and particularly to an attraction release mechanism thereof.

[Prior art] The double door of an audio rack or the opening/closing lid of a cabinet that houses the drive parts of various precision devices employs a rocking body mechanism in which one end is rotatably supported and the other end is operated to open and close. It is often done.

A magnetic piece (hereinafter referred to as the first magnetic piece) such as a magnet or a magnetic plate is normally attached to the free end (non-spindle support) side of the rocking body, and this is the main body when the rocking body is held (closed). The closed state is maintained by attracting a fixed side magnetic piece or magnet (hereinafter referred to as a second magnetic piece) fixed to the side.

[Problems to be Solved by the Invention]However, in the magnetic catch type latch structure that attracts both magnetic pieces as described above, the latching action itself can be easily performed with a relatively small force due to the magnetic attraction force. However, a large force is required to separate the first magnetic piece of the rocking body from the second magnetic piece on the fixed side when the attraction is released.

As a result, the rocking body, which is pulled away by a strong force when the suction is released, may gain momentum and collide with other structures disposed on the outside (rear side) of the rocking body, causing damage.

In addition to the above-mentioned magnetic catch type latch, it is also possible to move the oscillating body in the attracted state once in the attracted direction (non-release direction).
There has also been proposed a button-type latch that is arranged on the fixed side, which is pushed in and then swung in two steps in the release direction.

However, in this bush type latch structure,
Because the purpose of opening the rocking body and the action of moving the rocking body to the suction side, which is the opposite of releasing, are intuitively contradictory, the user often applies excessive force in the wrong direction, resulting in damage. This could easily lead to the problem of being left behind.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to provide a magnetic latch for a rocking body with a simple structure that can release the latch with a small force without causing an impact.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a first magnetic piece provided on the other end side of a rocking body, one end of which is rotatably supported;
a second magnetic piece that is fixedly disposed at a holding position of the rocking body and attracts the first magnetic piece; It is characterized in that it includes an adsorption release lever that releases the adsorption state with the magnetic piece.

[Function] Therefore, according to the present invention, the first and second magnetic pieces are released by slightly swinging the adsorption/removal lever prior to the swinging operation of the swinging body, thereby releasing the first and second magnetic pieces from the second magnetic piece on the fixed side. The first magnetic piece on the rocking body side can be reliably separated with a small force.

Then, the original opening action can be performed by rotating the rocking body with the bivalue pieces separated.

When the rocking body is opened, the suction state has already been released, so no strong force is required, and since the rocking body can be rocked slowly, there will be no inconvenience such as damage to surrounding structures due to impact.

[Examples] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

Figures 1 and 2 show the opening/closing lids (doors) of various cabinets.
It is a front view and a left side view showing a configuration example of a magnetic latch according to the present invention applied to a rocking body such as the above. In the figure, the rocking body 200 is a frame 20 on the main body side (not shown).
It is supported by a shaft 204 attached to 2 so as to be swingable at a predetermined angle.

In order to hold the rocking body 200 in a predetermined closed position, a magnet 206 is attached to the contact portion of the rocking body 200 with the main body, and the corresponding contact portion 208 on the main body side is made of a magnetic material. There is. Of course, on the contrary, it is also possible to attach a magnet to the abutting portion on the main body side and make the oscillator side a magnetic body, or to make both sides a magnet.

As mentioned above, in such a configuration, the magnet 20
When attempting to release or open the rocking body 200 latched by the magnet 206 and the magnetic body 208
A considerably large force is required to separate the two, and even after the two are separated, the force applied during the separation may be excessive and cause the rocking body 200 to collide with surrounding structures.

A feature of the present invention is the provision of an attraction/removal lever that can release the attracted state between the magnet on the oscillator side and the magnetic body on the main body side with a small force.

In the figure, the suction lever 210 is attached to the rocking body 200.
attached to the side end surface of the That is, the lever shaft 212
A knob 214 and a cam 216 are supported so as to be integrally rotatable by a predetermined amount.

One end of the cam 216 is biased counterclockwise in FIG. 2 by a spring 218 that is hooked between the cam 216 and the rocking body 200.

On the other hand, a slide m216a is formed in the center of the cam 216, and a stopper 220 fixed at a predetermined position of the rocking body 200 is in contact with one end of the slide groove 216a.

As a result, the cam 21 is urged downward by the spring 218.
6, this stopper 220 is connected to the sliding groove 2 of the cam 216.
When the magnet 206 is latched, the tip of the cam 216 is held in contact with the magnetic body 208 as shown in FIG. 2.

Next, the operation of this embodiment configured as described above will be explained with further reference to FIGS. 3 and 4.

From the latched state of the rocking body 200 shown in FIG.
14 in the clockwise direction as shown in the figure. At this time, knob 21
The amount of rocking 4 corresponds to the distance until the other end of the sliding groove 216a of the cam 216 comes into contact with the stopper 220, and is a small enough amount to release the attracted state between the magnet 206 and the magnetic body 208. It is understood that it has been set.

That is, when the knob 214 is rotated clockwise, the cam 216, which rotates together with the knob 214, also receives a force that tends to rotate the knob 214 clockwise.

At this time, since the tip of the cam 216 is already in contact with the magnetic plate 208 on the main body side, the clockwise rotational force is applied to the magnet 206 by the lever principle against the attraction force with the magnetic plate 208. This will act to separate them.

As a result, the magnet 206 and the magnetic plate 208 are pulled apart by a slight force based on the lever principle, as shown in FIG. 3, and a gap G is created between them.

At this time, as mentioned above, one end of the cam 216 is attached to the spring 218.
is biased counterclockwise by the stopper 22.
Since the amount of rotation of the cam 216 is also regulated by 0,
There is no problem of turning the knob 214 too much or with too much force.

After the adsorption state is released in this manner, strong force is no longer necessary, and the oscillating body 200 can be slowly oscillated to a desired angle as shown in FIG. 4.

Next, an example will be described in which the device of the present invention as described above is applied as a unit release lever in a document reading device.

FIG. 5 shows the overall configuration of a document reading device to which the present invention is applied.

The illustrated device has a horizontal suction/vertical exhaust bus which is further divided in flow order into a supply bus, a read bus and an exhaust bus.

In order to realize the bus, the device has a single drive motor, and the drive power of this motor provides the document feeding force to the bus through a gear train and a boob.

Furthermore, the device of this embodiment provides a device that can read both sides of a document at the same time, and a first light source and a second light source are arranged on both sides of the reading bus as described later, and a light source corresponding to both the light sources is provided. A first reading block and a second reading block are arranged horizontally and vertically, respectively.

First, the structure of the document bus will be explained.

A supply tray 12 protrudes from the outside of the device case 10, and documents to be read are placed on this tray 12 as will be described later.
Stocked on top. A feed roller 14 and a retard roller 16 are disposed close to the tray 12 and vertically opposed to each other, and only the topmost paper of the stocked documents is sucked into the supply path.

For this purpose, the feed roller 14 is moved counterclockwise in the figure.
The retard roller 16 is also rotated counterclockwise, and the feed roller 14 pulls in the topmost paper in the suction direction, and the document stocked below is pushed back toward the tray 2 by the retard roller 16 for effective paper handling. action is achieved.

Following the feed roller 14, the feed path has a horizontal feed belt 22 which transports the document to the next turn roller 24.
send to.

Said turning roller 24 forms the tail end of the feed path, where the document transitions from the horizontal bus to the vertical bus.

The document transferred to the vertical bus by the turning rollers 24 is then sent to the reading bus. In this example,
This read bus is connected to the first aperture plate 102, the second aperture plate 102,
It includes an aperture plate 104, through which a predetermined reading action takes place as the document passes between the aperture plates 102,104.

After passing through the reading bus, the document is then sent to the ejection bus.

The documents discharged from the discharge bus are sequentially stocked in a stocker outside the apparatus.

A document bus is formed as described above, and sensors are arranged along the document bus in order to monitor whether documents are being sucked into the document bus and being reliably ejected.

In an embodiment, the incoming document sensor 60 is connected to the feed belt 22.
It consists of an optical sensor including a light emitter and a light receiver.

The irradiation light of this sensor 60 is irradiated upward across the document bus, and a reflector 62 is provided above the document bus at this irradiation position.

Therefore, when there is no document on the supply bus, the incoming document sensor 60 receives reflected light from the reflector 62;
On the other hand, when a document is sucked into the supply path, the irradiation light is blocked by the document, so that the entry of the document can be detected.

Further, by detecting the lead edge of the document, the incoming document sensor 60 can instruct the timing at which the document reaches a reading position, which will be described later, from the feed speed of the document bus.

Next, the structure of the document reading section will be explained.

Approximately central portions of both aperture plates 102 and 104 form first and second reading positions, respectively. and,
Light sources 106 and 108 are provided to irradiate predetermined irradiation light to both the reading positions, and irradiate light toward the reading positions.

The above-mentioned side irradiation light is reflected on the document surface to generate reflected light according to its brightness, and the reflected light as shown by the chain line in the figure is guided to a reading block to be described later.

In order to read the reflected light on the front side of the document, the device is provided with a reading block 120, 140.

That is, the first reading block 120 is connected to the lens system 134.
The reflected light from the first reading position is reflected by a lens system 1.
34 and enters the light receiving unit 136, and is read line by line by the light receiver 136.

On the other hand, the second reading block 140 has almost the same structure as the first reading block 120, and has a lens system 146 and a light receiver 148 therein.
The reflected light from the reading position passes through the lens system 146 and enters the light receiving section 148.

As described above, the structure of the document bus and reading device of this embodiment is understood, and the operation during document reading will be briefly explained below.

Only the topmost sheet of the documents stacked on the tray 12 is sucked into the document bus from the feed roller 14, and is separated by the document-stripping roller 16 located below.As a result, the documents are fed into the document bus one by one. It will be.

When the document reaches the incoming document sensor 60, the sensor 6
0 detects the suction of a document and supplies a signal to a controller (not shown). The controller assigns a predetermined delay time to each reading block 12 based on the length from the sensor 60 to the reading position, which is known in advance, and the document feeding speed.
A reading start command of 0,140 is awaited.

When the document reaches the reading position, the reading block 12 is read from one or both of the front and back sides as necessary.
0.140 captures the desired reflection data and stores it.

Of course, it is also possible to have the controller read only the necessary positions within the document by trimming the reading positions within the document.

The document whose required document surface has been read is discharged from the discharge bus to the stack 58 of the device, and continuous document reading is automatically performed.

Here, the light source 108 side of the vertical bus is constructed as an oscillating body 300 in the form of an opening/closing lid, and the magnetic latch structure of the present invention according to FIGS. 1 to 4 is applied as is to the oscillating body 300. ing. In addition, in the illustrated example, each component is indicated by 100 in each part number in FIGS. 1 to 4.
It is shown as a number with . Furthermore, the sliding groove and stopper on the cam 316 in the figure are omitted.

Therefore, by slightly rotating the knob 314 clockwise from the closed state of the oscillating body 300 shown in FIG. 308.

As described above, the oscillator 300 is quietly and reliably released from the adsorption state with a small force by the latch release mechanism that applies the principle of leverage.

Then, by rotating the oscillator 300 to the state shown in FIG. 6, necessary operations such as removing jammed paper remaining in the document bus or inspecting parts may be performed.

Next, a second embodiment of the present invention will be described with reference to FIGS. 7 to 9.

In this embodiment, the magnet and the magnetic body are attracted and separated by a clothespin-type gripping operation.

In FIG. 7, a magnetic plate 402 is fixed to the main body side, and a magnet 406 is fixed to the rocking body 404 so as to be able to attract each other.

The movable lever 4 is attached to the magnet 406 on the swinging body 404.
08 is provided to be freely rotatable clockwise and counterclockwise about a shaft 410, and a stopper 412 for stopping the movement of the movable lever 408 in the counterclockwise direction is fixed on the swinging body 404. ing.

Further, a fixed side lever 414 is fixed on the swinging body 404, and one end of the movable side lever 408 and the fixed side lever 41
4 and are connected to each other via a spring 416 so that they can cooperate with each other.

Next, the operation of this embodiment will be explained.

The closed state of the rocking body 404 shown in FIG. 7, that is, the magnetic plate 402
As shown in FIG. 8, the movable lever 408 and the fixed lever 414 are pressed against each other in the direction of the arrow in the figure against the biasing force of the spring 416, as shown in FIG. .

As a result, the movable lever 408 rotates slightly clockwise around the shaft 410, and the magnet 406, which was attracted to the magnetic plate 402 due to the lever principle, easily and reliably releases the attracted state with a small operating force. As a result, a gap as shown in FIG. 8 is created between the two.

From this state, the desired opening action can be obtained by largely rotating the rocking body 404 in the direction of the arrow as shown in FIG.

Next, a third embodiment of the present invention will be described with reference to FIGS. 10 and 11. This embodiment is also of the clothespin type similar to the second embodiment, but uses a bush type magnetic catch as the magnet on the rocking body side. In the figures, the same components as those in the second embodiment are designated by the same reference numerals, and their explanations will be omitted.

In the figure, a magnetic plate 402 on the main body side is on the oscillator 404 side.
A bush-type magnetic catch 418 that can be attracted is fixed. And this magnetic catch 41
In FIG. 10, the end surface of the movable part 418a of No. 8 is the magnetic plate 402
It is in a state of adsorption.

The magnetic catch 418 is attached to the shaft 42 on the rocking body 404.
A movable lever 40 rotatably arranged around 0
Similarly to the second embodiment, the movable lever 408 and the fixed lever 414 are connected via a spring 416 so that they can cooperate with each other.

With the above configuration, when the movable lever 408 and the fixed lever 414 are pressed in the direction of approaching each other from FIG. moves to the left in the figure, and its movable portion 418a is pushed in as shown in FIG. 11, and at the same time its end surface is pulled off from the magnetic body 402 on the main body side.

Thereafter, the open state is obtained by swinging the swinging body 404 in the direction of the large arrow in FIG. 11, as in the previous embodiments.

FIGS. 12 and 13 show a fourth embodiment of a latch structure using a bush type magnetic catch similar to the third embodiment. The basic operation of this embodiment is almost the same as that of the third embodiment, and corresponding components are numbered with 100 added.

The difference from the third embodiment is that in this embodiment, the fulcrum 520 of the movable lever 508 is provided almost at the center, and correspondingly, the fixed lever 514
is formed at the front end of the swinging body 504, and a spring 516 is provided between the fixed lever 514 and the movable lever 508.
The stake has been passed.

Therefore, in this embodiment, the movable lever 508 and the fixed lever 514 are moved from the adsorption state shown in FIG.
When squeezed in the approaching direction as shown in the figure, the movable lever 5
08 is rotated counterclockwise to be further pushed in from the attracted state shown in FIG.
a separates from the magnetic plate 502.

From this state, the rocking body 50 moves in the direction of the arrow in FIG.
By rotating 4, the desired open state can be obtained.

[Effects of the Invention] As explained above, according to the present invention, a suction release lever is provided on the oscillating body, so by operating the lever, the magnetic plate on the main body side and the oscillating body side can be moved quietly with a small force. The adsorption state with the magnet, ie, the closed state, can be reliably released.

As a result, the oscillating body can be opened slowly after the magnet is removed from the magnetic plate, and the oscillating body does not damage surrounding structures due to excessive force applied to the removal, and The magnetic latch of the oscillator can be released with high efficiency.

[Brief explanation of drawings]

Fig. 1 is a front view of the magnetic latch structure according to the first embodiment of the present invention, Fig. 2 is a left side view of Fig. 1, and Figs. 3 and 4 are explanations of the operation of the first embodiment of the present invention. Figures 5 and 6 are diagrams showing the configuration and operation when the magnetic latch release according to the first embodiment of the present invention is applied to a document reading device, and Figure 7 is a diagram showing the structure and operation of the magnetic latch release according to the first embodiment of the present invention. 8 and 9 are diagrams illustrating the operation of the magnetic latch structure according to FIG. 7. FIG. 10 is a diagram showing the magnetic latch structure according to the third embodiment of the present invention. 10 is an explanatory diagram of the magnetic latch structure according to the fourth embodiment of the present invention. FIG. 13 is an explanatory diagram of the magnetic latch structure according to the fourth embodiment of the present invention. It is. 200 ... Rocking body 204 ... Shaft 206 ... Magnet 208 ... Magnetic plate 210 ... Adsorption release lever Applicant Eastman Kodak Japan, Pan Co., Ltd.

Claims (1)

[Scope of Claims] A first magnetic piece provided on the other end side of a rocking body whose one end is swingably supported; and a first magnetic piece fixedly arranged at a holding position of the rocking body and attracted to the first magnetic piece. a second magnetic piece that is pivotally supported on the other end side of the rocking body so as to be able to swing slightly;
A magnetic latch for an oscillator, comprising: an attraction release lever for releasing an attraction state between a magnetic piece and a second magnetic piece.