JP4401273B2 - Filter attachment / detachment structure for electronic equipment - Google Patents

Description

  The present invention relates to a filter attachment / detachment structure provided in a vent hole of an electronic device.

In an electronic device such as an information terminal, a vent hole is opened in the device casing to dissipate heat from an electronic circuit provided inside the device. In order to prevent intrusion of dust from the vent hole, a filter is provided in the vent hole. Is detachably attached.
A typical conventional filter attachment / detachment structure is a structure in which a filter is fixed to a housing of an electronic device with a screw, and the filter is removed from the housing by removing the screw during maintenance for cleaning or the like (for example, Patent Documents) 1), or a structure in which a filter is slid in and removed from a housing of an electronic device (for example, see Patent Document 2).
Japanese Utility Model Laid-Open No. 5-20388 (paragraphs “0009” to “0012”, FIG. 1) Japanese Utility Model Publication No. 6-45395 (paragraph “0012”, paragraph “0016”, FIGS. 1 and 2)

However, each of the conventional techniques described above has the following problems.
In other words, in the case of a structure in which the filter is fixed with screws, when installing or removing the filter for cleaning or replacement, it is necessary to secure a working space so that a screwdriver for tightening or loosening the screw can be used, If there are other equipment or walls, it is necessary to pull out the equipment to the front and tighten or loosen the screws, which requires a large work space for attachment and detachment, and deteriorates workability. There's a problem.

In the case of a slide structure, when pulling out the filter, there is a problem that dust on the filter surface is scraped off at the edge of the opening hole for inserting the filter, and the dust falls inside the apparatus.
An object of the present invention is to solve such a problem.

  For this reason, the present invention has a door that can be opened and closed on the front surface, and an air hole is provided in at least one of the upper surface and both side surfaces of an electronic device housing in which an electronic circuit is mounted, and a filter is provided in the air hole. In the filter attachment / detachment structure of an electronic device that is detachably attached, one of a pair of male and female push latches that is locked when fitted to each other and pushed in a certain amount and unlocked when pushed further from the locked state is placed inside the vent hole. A flange-shaped filter guide provided with a locking hole is fixed to the casing so as to surround the ventilation hole. The other end of the push latch is provided on one end side of the filter, and a locking piece corresponding to the locking hole is formed on the other end, and the locking piece is locked to the filter guide. Both plug into, characterized in that to lock the push latch of the filter in the housing of the push latch.

  In the present invention thus constructed, after inserting the locking piece of the filter into the locking hole of the filter guide from an oblique direction, the push latch of the filter is pushed with a finger to be fitted into the push latch in the housing and locked. The filter can be attached, and when removing the filter, it can be removed by pushing the push latch of the filter with your finger and unlocking the push latch, so you can insert your hand along the side of the housing etc. If there is, it becomes possible to attach and detach the filter, so that a large work space is not required and workability is improved.

  Further, when removing the filter, the dust attached to the filter surface is not scraped off by the edge of the opening hole for inserting the filter, so that the effect of eliminating the falling off of dust inside the electronic device can be obtained.

  Hereinafter, embodiments of a filter attaching / detaching structure of an electronic device according to the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing the first embodiment, FIG. 2 is a cross-sectional plan view showing the first embodiment, and FIG. 3 is a perspective view showing the appearance of the electronic apparatus.
In the figure, 1 is a main frame, 2 is an upper cover, and 3 is a front cover, and these constitute a casing of the electronic device.
Here, the main frame 1 mainly forms a bottom surface, a front surface (front surface), and a rear surface (rear surface) of the housing, and an upper surface and both side surfaces are formed on the front side, and a push latch 4 is formed on a side surface on the front side. Is attached. An electronic circuit or the like (not shown) is mounted in the main frame 1, and maintenance of the electronic circuit or the like can be performed by inserting a maintenance tool or the like from a hole (not shown) provided on the front surface of the main frame 1. .

The upper cover 2 forms an upper surface and both side surfaces of the housing, and a vent hole 5 is provided on the front side of the side surface as shown in FIG. The main frame 1 is housed inside the upper cover 2 and fixed with screws or the like, and the push latch 4 is attached so as to be positioned in the vent hole 5 at the time of fixing.
The front cover 3 covers the front surface of the main frame 1 and is a door of the housing. The lower end side of the front cover 3 is rotatably attached to the front end portion of the main frame 1 and can be opened and closed by a rotating operation.

Reference numeral 6 denotes a filter guide formed in a frame shape, and is attached to the upper cover 2 so as to surround the vent hole 5.
A flange portion 7 is formed on the inner periphery of the filter guide 6 so as to be recessed from the surface of the filter guide 6 over the entire periphery. A hole 8 is provided.

  Reference numeral 9 denotes a filter, which is attached to the inner surface side of the plate material so as to collectively cover a plate material having a shape slightly smaller than the inner diameter of the filter guide 6 excluding the flange portion 7 and a large number of slits 9a provided in the plate material. A push latch 10 that is paired with a push latch 4 attached to the main frame 1 is attached to a predetermined position on one end side of the plate material, that is, the rear surface side of the housing. Further, an L-shaped locking piece 11 is formed at the other end of the plate as shown in FIG.

  The push latch 4 and the push latch 10 are locking means for the filter 9 and have a male and female structure that can be fitted to each other, and the male push latch 10 is pushed into the female push latch 4 by a certain amount to be coupled to each other. Then, when the push latch 10 is further pushed in with this position as the lock position, the lock of both is released, and when the push latch 10 is further pulled out in the direction opposite to the pushing direction, the push latch 4 and the push latch 10 are It is to be separated.

  Reference numeral 12 denotes a dustproof cushion for preventing dust from entering the housing from the gap between the inner surface of the filter 9 and the flange portion 7 of the filter guide 6. The dustproof cushion 12 is formed in a frame shape having the same size as the flange portion 7. It is affixed to the surface of the flange part 7 with a double-sided tape or the like. As the material of the dustproof cushion 12, it is desirable to use polyurethane having a low repulsive force that can be compressed with a minute force.

Next, the operation of the first embodiment having the above-described configuration will be described.
First, when attaching the filter 9, one end of the filter 9 is grasped with one hand, the engaging piece 11 formed at the other end is inserted into the engaging hole 8 of the filter guide 6 from an oblique direction, and the engaging piece 11 is supported as a fulcrum. One end of the filter 9 is pressed against the filter guide 6 so that the filter 9 is rotated.

  As a result, the push latch 10 of the filter 9 is fitted into the push latch 4 on the main frame 1 side, so that when the push latch 10 is pushed into the lock position with a finger as it is, the push latch 10 is coupled to the push latch 4 on the main frame 1 side. Thus, the filter 9 is fixed to the filter guide 6 so as to be in close contact with the flange portion 7 of the filter guide 6 with the dust cushion 12 interposed therebetween.

In the operation at this time, the dustproof cushion 12 attached to the flange portion 7 of the filter guide 6 can be compressed with a minute force as described above. Therefore, the pushing force on the push latch 10 side of the filter 9 is applied at the fingertip. A small force that can be pushed in is sufficient.
When removing the filter 9 for cleaning or replacement, when the push latch 10 of the filter 9 is pushed in with a finger, the filter 9 moves so as to rotate about the locking piece 11, thereby pushing the push latch 10 of the filter 9. Moves further from the lock position to the push latch 4 side, and the push latch 10 and the push latch 4 are unlocked.

This state is state A shown in FIG.
In this case as well, the dustproof cushion 12 is compressed by the filter 9, but since the dustproof cushion 12 can be compressed with a very small force, the pushing force of the push latch 10 can be as small as that at the time of attachment.
After the lock of the push latch 10 and the push latch 4 is released, when the finger is released from the push latch 10, the filter 9 is reversed by the repulsive force (restoring force) of the dust-proof cushion 12 with the locking piece 11 as a fulcrum in the rotation direction. Thus, one end of the filter 9 is lifted from the filter guide 6 and the push latch 10 is separated from the push latch 4.

This state is the state B shown in FIG. 2, and when the filter 9 is grasped by one hand and pulled out obliquely so as to slide to the front side of the housing, the locking piece 11 of the filter 9 is moved to the filter guide 6. Thus, the filter 9 can be removed.
As described above, according to the first embodiment, after the locking piece 11 of the filter 9 is inserted into the locking hole 8 of the filter guide 6 from an oblique direction, one end of the filter 9 is pressed against the filter guide 6 side. Then, the filter 9 can be attached by fitting the push latch 10 of the filter 9 to the push latch 4 on the main frame 1 side and locking it, and when removing the filter 9, push the push latch 10 of the filter 9 with your finger. When the push latch 10 and the push latch 4 are unlocked by pushing in, one end of the filter 9 is lifted by the dustproof cushion 12 sandwiched between the filter 9 and the filter guide 6. Can be removed.

Therefore, if there is a space in which a hand can be inserted along the side surface of the housing, the filter 9 can be attached and detached, so that a large work space is not required and workability is improved.
Further, when the filter 9 is removed, the dust on the filter surface is not scraped off at the edge of the opening hole for inserting the filter, so that the effect of eliminating the dust falling into the electronic device can be obtained.

Further, since the dustproof cushion 12 sandwiched between the filter 9 and the filter guide 6 is compressed with a very small force, a large force is not required to push the push latch 10 when the filter 9 is attached and detached, and a small force is required. It becomes possible to easily lock and release the lock.
FIG. 4 is a side view of an essential part showing a second embodiment of the present invention, FIG. 5 is a front view of a filter stopper in the second embodiment, and FIG. 6 is a transverse plan view of the filter stopper.

  In the second embodiment, in addition to the configuration of the first embodiment, a filter stopper 13 for preventing the filter 9 from being inadvertently removed is provided on the front side surface of the main frame 1 as shown in FIG. Slidably provided in the vicinity of the push latch 4 located at the position, and a contact portion 9b projecting toward the inside of the housing is formed on the peripheral portion of the push latch 10 of the filter 9 so as to come into contact with the filter stopper 13 It is.

  Here, the filter stopper 13 is formed of a plate material such as metal, and as shown in FIG. 5, two parallel long holes with the longitudinal direction of the casing as the longitudinal direction are the first guide hole 14 and the second guide. As shown in FIG. 6, a pressing portion 16 extending in parallel with the front surface of the main frame 1 is formed at one end, and a spring hooking portion 17 is parallel to the pressing portion 16 at the other end. It is formed to become.

On the other hand, a guide pin 18 corresponding to the first guide hole 14 of the filter stopper 13 is fixed to the front side surface of the main frame 1, and a projection 19 corresponding to the second guide hole 15 is formed from the back side. Further, a long hole (not shown) through which the spring hook 17 is passed is provided with the longitudinal direction of the casing as the longitudinal direction.
The filter stopper 13 has the first guide hole 14 and the second guide hole 15 fitted to the guide pin 18 and the protrusion 19 respectively, and the spring hooking portion 17 of the filter stopper 13 is fitted to the long hole (not shown). The filter stopper 13 is attached to the front side surface of the main frame 1 so as to be slidable in the front-rear direction of the housing, and the filter stopper 13 is moved to the front of the housing by a spring 20 passed between the spring hooking portion 17 and the front surface of the main frame 1. It is biased in the direction of the arrow C shown in FIG.

Note that a hole is provided in the spring hooking portion 17, and an end portion of the spring 20 is hooked in this hole. The front surface of the main frame 1 can be hooked on the end of the spring 20 with the same structure.
The second guide hole 15 of the filter stopper 13 and the protrusion 19 of the main frame 1 are provided to prevent rotation of the guide and the filter stopper 13 when the filter stopper 13 slides. The second guide hole 15 and the protrusion 19 can be omitted in consideration of the accuracy of a long hole (not shown) that passes therethrough.

  FIG. 7 is an enlarged view showing the structure of the guide pin 18. As shown in the figure, the guide pin 18 has a first guide hole 14 in which the diameter of the head 18a is provided in the filter stopper 13 so that the filter stopper 13 does not fall off. The shaft portion 18b that fits into the first guide hole 14 has a diameter slightly smaller than the vertical width of the first guide hole 14 and has a shaft length. L is slightly larger than the plate thickness of the filter stopper 13 so that rattling and friction when the filter stopper 13 slides can be minimized.

The operation of the second embodiment having the above-described configuration will be described.
8 and 9 are explanatory diagrams showing the operation, FIG. 8 shows the relationship between the filter 9 and the filter stopper 13 during operation of the electronic device, and FIG. 9 shows the relationship between the filter 9 and the filter stopper 13 when the filter is attached and detached. 8A and 9A are side views, and FIG. 8B is a plan view.
As in the first embodiment, the filter 9 is attached to the filter guide 6 by the lock of the push latch 10 and the push latch 4.

At the time of normal operation of the electronic device or transport for shipping, etc., the front cover 3 is closed as shown in FIG. 4, and the front cover 3 is locked so as not to be opened by a lock mechanism (not shown).
In this state, the pressing portion 16 of the filter stopper 13 is pressed by the inner surface of the front cover 3 and is pressed against the front surface of the main frame 1 as shown in FIG. 6. At this time, the filter stopper 13 resists the urging force of the spring 20. Then, while extending the spring 20, it moves in the direction of the arrow D shown in FIG. 8A, that is, the rear surface direction of the housing, and as shown in FIG. 8B, the end of the filter stopper 13 on the spring hooking portion 17 side. The part comes into contact with the contact part 9 b of the filter 9.

Therefore, even if the push latch 10 of the filter 9 is pushed, the filter 9 does not move, and the lock of the push latch 10 and the push latch 4 is not released. Therefore, if the push latch 10 is pushed by mistake, the filter 9 may be inadvertently detached. Is prevented.
On the other hand, when the filter 9 is cleaned or replaced during maintenance, the front cover 3 is unlocked and rotated 90 degrees so that the front cover 3 is tilted forward as shown by the two-dot chain line in FIG. open.

By the opening operation of the front cover 3, the pressing portion 16 of the filter stopper 13 is released from the pressing force of the front cover 3, so that the spring 20 is restored and contracted. The restoring force at that time causes the filter stopper 13 to move to FIG. ) In the direction of arrow C shown in FIG.
This movement causes the filter stopper 13 to move away from the contact portion 9b of the filter 9 as shown in FIG. 9B, so that it is possible to push the push latch 10 and push the filter 9 as shown by the two-dot chain line. Become.

Therefore, in this state, similarly to the first embodiment, the push latch 10 of the filter 9 can be pushed to unlock the push latch 4 of the main frame 1 and the filter 9 can be detached from the filter guide 6.
As described above, according to the second embodiment, the filter main body 1 of the casing is provided with the filter stopper 13 that slides in the front-rear direction of the casing in conjunction with the opening and closing of the front cover 3. That is, when the contact portion 9b protruding inside the housing is provided and the front cover 3 is closed, the filter stopper 13 is in contact with the contact portion 9b so that the filter 9 does not move even if the push latch 10 of the filter 9 is pushed. Therefore, it is possible to prevent the filter 9 from being inadvertently detached due to the push latch 10 being accidentally pushed during operation or transportation, and to the inside of the electronic device due to the inadvertent dropping of the filter 9. Intrusion of dust can be prevented in advance.

The present invention is not limited to the first and second embodiments described above.
For example, in the first and second embodiments, it is assumed that the casing of the electronic device is constituted by the main frame 1, the upper cover 2, and the front cover 3, and the main frame 1 has the push latch 4 or the push latch 4 and the filter stopper. 13 has a structure in which the main frame 1 and the upper cover 2 are integrated, that is, the upper surface, the bottom surface, both side surfaces, and the rear surface are integrated, and the front cover 3 can be opened and closed at the front opening as a door. It is applicable also to the housing | casing of the structure provided in. In this case, if a bracket or the like facing the side surface with a space is provided in the housing and the push latch 4 or the push latch 4 and the filter stopper 13 are provided on the bracket, the same as in the first and second embodiments. The following effects can be obtained.

  Of course, the present invention can also be applied to the case where the vent hole 5 is provided on the upper surface of the housing or the vent hole 5 is provided on both side surfaces.

Exploded perspective view showing the first embodiment Transverse plan view showing the first embodiment Perspective view showing appearance of electronic device Side view of main part showing second embodiment Front view of the filter stopper in the second embodiment Cross section of filter stopper Enlarged view showing guide pin structure Explanatory drawing which shows the effect | action of 2nd Example Explanatory drawing which shows the effect | action of 2nd Example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main frame 2 Upper cover 3 Front cover 4 Push latch 5 Ventilation hole 6 Filter guide 7 Flange part 8 Locking hole 9 Filter 9a Slit 9b Contact part 10 Push latch 11 Locking piece 12 Dust-proof cushion 13 Filter stopper 14 First guide hole 15 Second guide hole 16 Pressing portion 17 Spring hooking portion 18 Guide pin 19 Projection 20 Spring

Claims (3)

An electronic device having a door that can be opened and closed on the front surface, a vent hole is provided on at least one of the upper surface and both side surfaces of an electronic device housing in which an electronic circuit is mounted, and a filter is removably attached to the vent hole In the filter attachment / detachment structure,
Installed in the housing so that one of a pair of male and female push latches that are fitted to each other and pushed in a certain amount and locked, and unlocked when pushed further from the locked state is located inside the vent hole,
A flange portion is formed on the inner periphery so as to be recessed from the surface, and a frame-shaped filter guide provided with a locking hole is fixed to the housing so as to surround the vent hole,
The other end of the push latch is provided on one end side of the filter, and a locking piece corresponding to the locking hole is formed on the other end,
A filter attaching / detaching structure for an electronic device, wherein the engaging piece is inserted into the engaging hole of the filter guide and the push latch of the filter is locked to the push latch in the housing. The filter attachment / detachment structure for an electronic device according to claim 1,
A filter attaching / detaching structure for an electronic device, wherein a dustproof cushion having a low repulsive force is sandwiched between a flange portion of the filter guide and the filter. In the filter attachment / detachment structure of the electronic device according to claim 1 or 2,
Provide a contact portion projecting inside the housing to the filter,
Provide a filter stopper that moves back and forth in conjunction with the opening and closing of the door,
The filter stopper is in contact with the contact portion so as to overlap the contact portion when the door is closed in a state where the push latch is locked, and the push latch provided on the filter is further prevented from being pushed in from the locked state. In addition, the filter attachment / detachment structure for an electronic device is characterized in that when the door is opened, the door is detached from the contact portion.

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