JP4896188B2 - Member fixing device and electronic device - Google Patents

Description

    The present invention relates to a fixture for fixing a member such as a ferrite core in an electronic device such as a copying machine or an electrophotographic printer, and also relates to an electronic device including the fixture.

Conventionally, a ferrite core is generally attached to a cable in order to reduce electrical noise generated in an electronic device or the like. As a method for fixing the ferrite core, for example, there is a method disclosed in Japanese Patent Laid-Open No. 2000-173827. This is because the ferrite core is accommodated in the storage case with the cable passing through the hollow portion of the ferrite core, and the claw portion of the engaging portion provided on the lower surface of the storage case is engaged with the electronic device casing or the substrate. In this way, the ferrite core is fixed.

JP 2000-173827 A

  However, in the conventional ferrite core fixing structure described above, since the fixing engaging portion is provided in the storage case for storing the ferrite core, the storage case must be fixed to the place where the ferrite core is to be fixed. However, if the place where the ferrite core is to be fixed is very narrow, the storage case cannot be fixed. For this reason, the ferrite core was fixed by selecting a place with enough space to fix the storage case.

In order to solve the above-described problems, a member fixing tool and an electronic device according to the present invention include a holding portion that has a hollow portion and restricts and holds the movement of a member through which a cable penetrates the hollow portion, and the holding portion. And a fixed portion that is fixed to an attachment target, and the holding portion includes a central holding portion formed on the same plane as the fixed portion, and the central holding portion. formed foldably on both sides, one tip claws portion is formed on the, other hole is provided in, consists of a pair of arms each having a flexible, the key to the hole When the base part of the claw part enters, the pair of arm parts can be locked to each other while holding the member.

  According to the present invention configured as described above, the member is held by the holding portion while restricting the movement, and is fixed to the attachment target by the fixed portion. .

6 is a perspective view showing a ferrite core fixture in the form of Reference Example 1. FIG. It is a front view which shows a ferrite core. 6 is a front view showing a ferrite core fixture in the form of Reference Example 1. FIG. It is a front view which shows the state by which the holding | maintenance part of the ferrite core fixing tool was penetrated by the hollow part of the ferrite core. It is a perspective view which shows the state holding the ferrite core. It is a perspective view which shows the state holding the ferrite core. It is explanatory drawing which shows the state which fixed the ferrite core fixing tool. It is a perspective view which shows the ferrite core fixing | fixed part of 1st Embodiment. It is a perspective view which shows the ferrite core fixing operation | movement in 1st Embodiment. It is a perspective view which shows the ferrite core fixing operation | movement in 1st Embodiment. It is a perspective view which shows the ferrite core fixing tool of 2nd Embodiment. It is a perspective view which shows the ferrite core fixing operation | movement in 2nd Embodiment. It is a perspective view which shows the ferrite core fixing operation | movement in 2nd Embodiment. It is a perspective view which shows the ferrite core fixing operation | movement in 2nd Embodiment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each embodiment described below, a ferrite core will be described as an example of a member having a hollow portion. FIG. 1 is a perspective view showing a ferrite core fixture according to the first embodiment of the present invention, FIG. 2 is a front view showing the ferrite core, and FIG. 3 is a front view showing the ferrite core fixture according to the first embodiment. .

  In FIG. 1, a ferrite core fixture 1 is formed from a film sheet-like flat plate-like elastic member, and includes a holding portion 2 and a fixed portion 3. The holding part 2 has two arm parts 5 and 6 formed with the groove part 4 therebetween, and the shapes of the arm parts 5 and 6 are formed symmetrically with respect to each other. Chamfered portions 5a and 6a and key claw portions 5b and 6b are formed on the distal end sides (upper side in the drawing) of the arm portions 5 and 6, respectively, and a fitting portion parallel to the groove portion 4 is formed on the center outside of the arm portions 5 and 6. 5c and 6c are formed. Shelves 5d and 6d are formed below the fitting portions 5c and 6c, respectively.

  A screw hole 7 for fixing the ferrite core fixture 1 to an attachment target is formed in the fixed portion 3. The screw hole 7 is formed at a position shifted to one side from the extension line of the groove portion 4 of the holding portion 2.

The material of the ferrite core fixture 1 in the form of the present reference example 1 is made of polyethylene terephthalate (PET). However, the material may be a plastic material such as ABS resin or engineering plastic, and may be a metal film or the like as long as it has equivalent properties.

  FIG. 3 shows a state in which the ferrite core fixture 1 is inserted through the hollow portion of the ferrite core. 2 and 3, the ferrite core 10 has a flat oval hollow portion 11. The width (major axis) L1 of the hollow part 11 is 20 mm, and the thickness (minor axis) t of the hollow part 11 is 1.0 mm. In addition, the thickness of the ferrite core fixture 1 is formed to 0.5 mm, and the thickness of the cable described later is set to 0.3 mm.

  Here, the dimensional relationship between the ferrite core fixture 1 and the hollow portion 11 of the ferrite core 10 will be described. The maximum width of the holding part 2 of the ferrite core fixture 1, that is, the distance L2 from the key claw part 5b to the key claw part 6b is set to be larger than the width L1 of the hollow part 11 of the ferrite core 10. Since the groove portions 4 are formed between the arm portions 5 and 6 of the ferrite core fixture 1, the arm portions 5 and 6 can be bent until they come into contact with each other in a direction approaching each other. The distance L3 from the lock claw portion 5b to the lock claw portion 6b when the arm portions 5 and 6 are in contact with each other (when the arm portions 5 and 6 are in the state indicated by the two-dot chain line) is smaller than the width L1 of the hollow portion 11. A width L4 of the groove 4 is set.

  That is, the widths are set so that L1 <L2, L1> L3, and L3 = L2−L4.

  The distance L5 from the fitting part 5c to the fitting part 6c is shorter than L2, and is set to be approximately the same as or slightly larger than the width L1 of the hollow part 11. By setting the dimensions in this way, when the fitting portions 5 c and 6 c are inserted into the hollow portion 11 of the ferrite core 10, there is no backlash between the fitting portions 5 c and 6 c and the outer periphery of the hollow portion 11. The distance L6 from the shelf 5d to the shelf 6d is set to be larger than the width L1 of the hollow portion 11.

Next, the operation of fixing the ferrite core in the form of Reference Example 1 will be described. FIG. 4 shows a state where the holding portion of the ferrite core fixture is inserted through the hollow portion of the ferrite core. In FIG. 3, after a flat cable (not shown) is passed through the hollow portion 11 of the ferrite core 10, the holding portion 2 of the ferrite core fixture 1 is inserted into the hollow portion 11 of the ferrite core 10.

First, the chamfered portions 5 a and 6 a of the ferrite core fixture 1 are brought into contact with both ends of the hollow portion 11 of the ferrite core 10, and the holding portion 2 is pushed into the hollow portion 11 from this state. By this pushing operation, the arm portions 5 and 6 are bent in a direction approaching each other, and are in contact with each other as indicated by a two-dot chain line in FIG. In this state, the holding part 11 can be inserted, and both the arm parts 5 and 6 enter the hollow part 11.

  When the key claws 5b and 6b pass through the hollow portion 11, the arms 5 and 6 are separated from each other and return to the original state by the restoring force of the arms 5 and 6 as shown in FIG. As a result, the distance between the key claws 5b and 6b is increased, and the holding portion 2 is prevented from being removed from the hollow portion 11. At this time, when the distance L5 between the fitting portions 5c and 6c is set to be slightly larger than the width L1 of the hollow portion 11, the fitting portions 5c and 6c are pressed against the outer periphery of the hollow portion 11 and there is no backlash. . Note that the length of the fitting portions 5c and 6c (the distance from the key claws 5b and 6b to the shelves 5d and 6d) is set slightly longer than the length of the ferrite core 10, and the ferrite core 10 has the key claws 5b, It is hold | maintained by the fitting parts 5c and 6c between the shelf parts 5d and 6d from 6b.

  The state where the ferrite core 10 penetrating the flat cable 12 is held by the ferrite core fixture 1 is shown in FIGS. In both figures, the flat cable 12 and the ferrite core 10 are held by the ferrite core fixture 1, and at this time, the screw hole 7 of the fixed portion 3 is located away from the flat cable 12, and the ferrite core fixture 1 is attached. The flat cable 12 does not get in the way when fixed to the cable. The ferrite core 10 and the ferrite core fixture 1 are movable with respect to the flat cable 12.

  Next, the ferrite core fixture 1 is screwed to the attachment target using the screw holes 7 formed in the fixed portion 3 of the ferrite core fixture 1. A case where an electrophotographic printer is taken as an example of the attachment object is shown in a partially cutaway state in FIG. In FIG. 7, an operation unit substrate 22 is disposed inside an operation unit case 21 of the electrophotographic printer 20, and the operation unit substrate 22 includes a connector 23. A flat cable 12 is connected to the connector 23.

  A control board 24 is disposed at the bottom of the printer 20. The control board 24 includes a connector 25, and the flat cable 12 connects the connector 25 and the connector 23 of the operation unit board 22. The ferrite core 10 is inserted with the flat cable 12, and the ferrite core 10 is held by the ferrite core fixture 1. The ferrite core fixture 1 is fixed to the frame 26 on the side of the printer 20 with screws 27. In the case of the example shown in FIG. 7, the mounting surface of the frame 26 is horizontal, and the ferrite core fixture 1 is fixed by screws 27 in a state of being bent substantially vertically.

  By moving the ferrite core 10 and the ferrite core fixture 1 with respect to the flat cable 12, the ferrite core 10 can be fixed at an optimum position. Moreover, it can fix to an optimal position also by setting the length or shape of the to-be-fixed part 3 of the ferrite core fixing tool 1 arbitrarily.

  When removing the ferrite core 10, the above operation may be reversed. That is, the screw in the fixed portion 3 of the ferrite core fixture 1 is removed, and the ferrite core fixture 1 is removed from the attachment target. Then, the arms 5 and 6 of the ferrite core fixture 1 are narrowed and the ferrite core fixture 1 is removed from the hollow portion 11 of the ferrite core 10 to be removed.

  When the ferrite core 10 is removed, the ferrite core 10 and the flat cable 12 can be detached even if the ferrite core 10 is pulled out from the ferrite core fixture 1 with the ferrite core fixture 1 fixed to the attachment target. is there. In particular, when maintenance is required for the device to be attached, maintenance can be easily performed by removing only the ferrite core 10 while the fixture 1 is fixed to the device.

As described above, according to the embodiment of the reference example 1 , the ferrite core 10 can be held only by inserting the holding portion 2 of the ferrite core fixture 1 into the hollow portion 11 of the ferrite core 10, and the fixed portion of the ferrite core fixture 1 can be held. 3, the ferrite core 10 can be easily fixed. In addition, since the ferrite core fixture 1 is composed of a film sheet-like flat plate, it does not require a dedicated mold for manufacturing, and can be manufactured at low cost, and even when the flat cable 12 is bent. The ferrite core fixture 1 can be deformed to some extent according to the bending, and can be fixed at the position where the flat cable 12 is bent.

  Further, since the length or shape of the fixed portion 3 of the ferrite core fixture 1 can be arbitrarily set, and the position of the screw hole 7 can be arbitrarily set, the ferrite core 10 can be placed at the optimum position to be attached. Can be fixed.

Next, a first embodiment will be described. FIG. 8 is a perspective view showing the ferrite core fixing portion of the first embodiment. 8, the ferrite core fixing member 31 of the first embodiment, as in the form of a reference example, is composed of an elastic member in the film sheet-like flat shape, and a holding portion 32 fixed portion 33 Composed. The holding part 32 includes a central holding part 34 and a pair of arm parts 35 and 36 formed to be foldable on both sides thereof. Square holes 35a and 36a are formed at the base portions of both arm portions 35 and 36, respectively, a hook claw portion 35b is formed at the distal end portion of the arm portion 35, and the other arm portion 36 has a cut portion 36c. A square hole 36b is formed. The key claw portion 35b can be inserted into the cut portion 36c, and when the base portion 35c of the key claw portion 35b enters the square hole 36b of the arm portion 36, the arm portion 35 and the arm portion 36 are locked to each other.

  The height of the square holes 35a, 36a is set slightly larger than the thickness of the ferrite core 10, and the width of the square holes 35a, 36a (the length in the vertical direction in FIG. 8) is slightly smaller than the length of the ferrite core 10. It is set large. Therefore, the ferrite core 10 can enter the square holes 35a and 36a. The width of the center holding portion 34 (distance between both arm portions 35 and 36) is slightly larger than the flat cable 12 and is set slightly shorter than the width of the ferrite core 10.

Bending portions 37 and 38 are formed on both sides of the central holding portion 34 so as to enter the square holes 35a and 36a, respectively. The lengths of the bending raising portions 37 and 38 are substantially the same as the length of the ferrite core 10. Is set. The length from one bent raised portion 37 to the other bent raised portion 38 is set to be substantially the same as the width of the ferrite core 10. In the fixed portion 33, as in the case of the reference example 1 , the screw hole 7 is formed at a position shifted to one side from the position where the flat cable is arranged.

Next, the ferrite core fixing operation in the first embodiment will be described. 9 and 10 are perspective views showing the ferrite core fixing operation in the first embodiment. In both figures, the center holding part 34 of the ferrite core fixture 31 is applied to the ferrite core 10 that has penetrated the flat cable 12 into the hollow part 11, and both arm parts 35 and 36 are bent as shown in FIG. . At this time, since both side portions of the ferrite core 10 enter the square holes 35a and 36a, the arm portions 35 and 36 are easily bent. Further, at this time, the ferrite core 10 is held between the bent raised portions 37 and 38, whereby the ferrite core 10 is restricted from moving in the left-right direction. By bending both arm portions 35 and 36, the ferrite core 10 is restricted from moving up and down.

  Next, the key claw portion 35b of the arm portion 35 is inserted into the cut portion 36c of the arm portion 36, and the base portion 35c of the key claw portion 35b is inserted into the square hole 36b to obtain the state shown in FIG. Accordingly, the arm portion 35 and the arm portion 36 are locked with each other while holding the ferrite core 10.

Next, as in the case of the first embodiment, the ferrite core fixture 31 is screwed to the attachment target using the screw holes 7 formed in the fixed portion 33 of the ferrite core fixture 31.

  When removing the ferrite core 10, the above operation may be reversed. That is, the screw in the fixed portion 33 of the ferrite core fixture 31 is removed, and the ferrite core fixture 31 is removed from the attachment target. Then, the key claw portion 35b of the arm portion 35 of the ferrite core fixture 31 is extracted from the square hole 36b of the arm portion 36, and both the arm portions 35 and 36 are widened to release the holding state of the ferrite core 10. Moreover, you may make it remove only the ferrite core 10 and the flat cable 12 with the ferrite core fixing tool 31 fixed to the attachment object.

According to the first embodiment as described above, in addition to the effects possessed by the embodiments above Reference Example 1, since to hold the ferrite core 10 from the outside, the size of the hollow portion 11 of the ferrite core 10 The ferrite core 10 can be fixed regardless of the above. Further, since the ferrite core 10 is held so as not to move in the vertical direction and the horizontal direction, the ferrite core 10 is prevented from being damaged by directly contacting with neighboring parts due to vibration or impact of the device to be attached. Can do. Furthermore, since the ferrite core 10 can be held only by locking both the arm portions 35 and 36, there is an effect that the holding operation is extremely easy.

Next, a second embodiment will be described. FIG. 11 is a perspective view showing the ferrite core fixture of the second embodiment. 11, a ferrite core fixing member 41 of the second embodiment, similarly on purpose engaging the first embodiment, is formed of an elastic member in the film sheet flat plate-shaped holding portion 42 and the fixed portion 43. The holding part 42 has a central holding part 44 and a pair of arm parts 45 and 46 formed to be foldable on both sides thereof. Square holes 45a and 46a are formed at the base portions of both arm portions 45 and 46, respectively, a hook claw portion 45b is formed at the distal end portion of the arm portion 45, and the other arm portion 46 has a cut portion 46c. A square hole 46b is formed. The key claw portion 45b can be inserted into the cut portion 46c, and when the base portion 45c of the key claw portion 45b enters the square hole 46b of the arm portion 46, the arm portion 45 and the arm portion 46 are locked to each other.

Similar to the first embodiment, the height of the square holes 45a and 46a is set slightly larger than the thickness of the ferrite core 10, and the width of the square holes 45a and 46a (the length in the vertical direction in FIG. 11) is set. The length of the ferrite core 10 is set slightly larger. Therefore, the ferrite core 10 can enter the square holes 45a and 46a. The width of the central holding portion 44 (distance between both arm portions 45 and 46) is set to be slightly larger than the flat cable 12 and slightly shorter than the width of the ferrite core 10.

  Two kinds of bending raising portions 45d, 45e, 46d, and 46e are formed on both sides of the central holding portion 44 so as to enter the square holes 35a and 36a, respectively. The length from one bent raised portion 45e to the other bent raised portion 46e is set to be slightly larger than the width of the ferrite core 10. By holding the ferrite core 10 from the outside, the ferrite core 10 is pulled out in the left-right direction. Prevent exiting. In addition, the other kind of the bent raised portion 45d and the bent raised portion 46d have a distance between them that is substantially the same as the distance between the arm portions 45 and 46, and the height is set lower than the bent raised portions 45e and 46e. . Therefore, when the ferrite core 10 is held by the holding portion 42, the ferrite core 10 is crushed by the side surface portion. The bent raised portions 45d and 46d are formed to restrict the movement of the ferrite core when holding a small type of ferrite core described later.

In the fixed portion 43, similarly to the form of the reference example 1 , the screw hole 7 is formed at a position shifted to one side from the position where the flat cable is arranged.

Next, the ferrite core fixing operation in the second embodiment will be described. 12 to 14 are perspective views showing the ferrite core fixing operation in the second embodiment. In the second embodiment, an operation of fixing two types of ferrite cores having different sizes in the height direction will be described. First, a case where a high ferrite core is fixed will be described.

  In FIG. 12, the center holding portion 44 of the ferrite core fixture 41 is applied to the ferrite core 10 that penetrates the flat cable 12 through the hollow portion 11, and both arm portions 45 and 46 are bent. At this time, since both side portions of the ferrite core 10 enter the square holes 45a and 46a, the arm portions 45 and 46 are easily bent. At this time, the ferrite core 10 is held between the bent raised portions 45e and 46e, and thereby the ferrite core 10 is restricted from moving in the left-right direction. At this time, the ferrite core 10 is put on the bent raised portions 45d and 46d. By bending both arm portions 45 and 46, the ferrite core 10 is restricted from moving up and down. At this time, the ferrite core 10 is held in a pressure contact state by the elastic force of the bent raised portions 45d and 46d.

  Next, the key claw portion 45b of the arm portion 45 is inserted into the cut portion 46c of the arm portion 46, and further, the base portion 45c of the key claw portion 45b is inserted into the square hole 46b to obtain the state shown in FIG. Thus, the arm portion 45 and the arm portion 46 are locked with each other while the ferrite core 10 is held.

Next, as in the case of the first embodiment, the ferrite core fixture 41 is screwed to the mounting target using the screw holes 7 formed in the fixed portion 43 of the ferrite core fixture 41.

  Next, a case where a ferrite core having a low height is fixed will be described. In FIG. 14, the ferrite core 14 having a low height is held between the bent raised portion 45e and the bent raised portion 46e. That is, the lengths of the bent raised portions 45e and 46e are set to dimensions that match the height of the ferrite core 14 that is low in height. At this time, since the bend-raised portions 45d and 46d are set to be narrower than the bend-raised portions 45e and 46e, the upward movement of the ferrite core 14 is restricted in the held state. That is, even when the ferrite core 14 having a low height is held, the movement of the ferrite core 14 can be restricted in the vertical direction and the horizontal direction.

  When removing the ferrite core 10 or 14, the above operation may be reversed. That is, the screw in the fixed portion 43 of the ferrite core fixture 41 is removed, and the ferrite core fixture 41 is removed from the attachment target. Then, the key claw portion 45b of the arm portion 45 of the ferrite core fixture 41 is extracted from the square hole 46b of the arm portion 46, and both arm portions 45 and 46 are widened to release the holding state of the ferrite core 10 or 14. Moreover, you may make it remove only the ferrite core 10 or 14 and the flat cable 12 with the ferrite core fixing tool 41 fixed to the attachment object.

As described above, according to the second embodiment, in addition to the effects of the first embodiment, two kinds of bending raising portions for holding the ferrite core are provided at different levels. Two different types of ferrite cores can be fixed. As a result, there is an effect that it is not necessary to separately prepare a ferrite core fixture according to the size of the ferrite core, and the management of parts and the management of physical distribution are not complicated. Furthermore, since it can be commonly used for two types of ferrite cores, the unit price of the ferrite core fixture can be reduced.

  In each of the above embodiments, the fixing member for fixing the ferrite core has been described as the core member fixing tool. However, the present invention is not limited to this, and any member that penetrates the cable and is installed on the cable may be used. It can also be applied to.

DESCRIPTION OF SYMBOLS 1, 31, 41 Ferrite core fixing tool 2, 32, 42 Holding part 3, 33, 43 Fixed part 5, 6, 35, 36, 45, 46 Arm part 10 Ferrite core 11 Hollow part 12 Flat cable

Claims (9)

A holding part that has a hollow part and restricts and holds the movement of the member through which the cable passes through the hollow part;
Connected via the holding part and the flexible part, and composed of a fixed part fixed to the object to be attached,
The holding part is
A central holding part formed on the same plane as the fixed part;
It is formed to be foldable on both sides of the central holding part, one is formed with a key claw part at the tip, and the other is provided with a hole part, each consisting of a pair of flexible arm parts,
The base member of the key claw part enters into the hole part, so that the pair of arm parts can be locked to each other while holding the member. On both sides of the central holding portion, there is a first restricting portion that restricts movement of the member in a direction orthogonal to the width direction of the cable,
The member fixture according to claim 1, wherein the first restricting portion has a hole formed in a base portion of the arm portion.   3. The member according to claim 2, wherein the first restricting portion restricts movement of the member when the pair of arm portions engage with each other while holding the member, and the member enters the hole. Fixture. The holding portion has a second restriction portion that restricts movement of the member in the width direction of the cable,
The member fixing tool according to any one of claims 1 to 3, wherein the second restricting portion is provided on both sides of the central holding portion and has at least a pair of bending raised portions whose ends are bent and raised.   The second restricting portion holds the member by sandwiching the member between the bent raising portions when the pair of arm portions are engaged with each other while holding the member, and moves the member. The member fixing tool according to claim 4 to regulate.   6. The member fixing tool according to claim 4, wherein two types of the bent raised portions are formed, and a left and right interval between one bent raised portions is larger than a left and right interval between the other bent raised portions.   The member fixing tool according to claim 1, wherein the member is a ferrite core, and the cable is a flat cable.   The member fixing tool according to any one of claims 1 to 7, wherein a width of the hole portion is narrower than a width of the key claw portion.   The electronic device carrying the member fixing tool in any one of Claims 1 thru | or 8.

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