JP2006165247A - Drawable electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drawable electronic equipment which has the few number of parts and a simple structure, to which an electronic equipment unit is retractable, and from which the electronic equipment unit is not slipped off other than required and has a high reliability. <P>SOLUTION: The drawable electronic equipment has a structure in which two drawing levers 20 are mounted rotatably on the front of the electronic equipment unit 4, and the front ends and abutting ends of grippers 22 for each drawing lever 20 are brought near to a front cover 10 under the state in which the electronic equipment unit 4 is inserted into a case 2 and the case 2 is covered with the front cover 10. The drawable electronic equipment further has the structure in which the state in which the slipping-off of the electronic equipment unit 4 is prevented by the bringing-near is brought, and each drawing lever 20 is rotated in the opening direction under the state in which the front cover 10 is removed. The drawable electronic equipment further has the structure in which the state is brought in which the abutting ends 26 are abutted against the edge 3 of the case 2, and the electronic equipment unit 4 is pulled out while using the abutting ends 26 as fulcra as the grippers 22 are gripped and the electronic equipment unit 4 can further be pulled out. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic device such as a protective relay, measuring instrument, controller, etc., and relates to a drawer-type electronic device in which an electronic device unit constituting the main body can be inserted into and removed from a case, and more specifically, an electronic device unit The present invention relates to improvement of a mechanism relating to insertion / removal.

  FIG. 6 shows a conventional example of this type of drawer type electronic apparatus. The drawer-type electronic device includes a box-shaped case 2, an electronic device unit 4 that is housed in the case 2 so as to be removable, and a front cover 10 that is fixed on the front surface of the case 2.

  Specifically, the drawer-type electronic device of this example is a drawer-type protective relay, and the electronic device unit 4 is a protective relay unit. The same applies to a drawer-type electronic apparatus according to an embodiment of the present invention described later.

  Male and female connectors 16 and 18 (connectors) that are automatically coupled to the rear surface portion of the case 2 and the rear surface portion of the electronic device unit 4 when the electronic device unit 4 is inserted into a predetermined position in the case 2. 18 is provided in FIG. 3).

  The front cover 10 is for internal protection such as dustproof, and has a transparent plate 12 made of glass, plastic or the like in this example. The front cover 10 is fixed on the front surface of the case 2 with fixing screws 14.

  Two drawer handles 6 (only one of which is shown in the drawing) are provided on the front surface of the electronic device unit 4, and the electronic device unit 4 can be pulled out of the case 2 by grasping them. Further, a fixing button 8 for fixing the electronic device unit 4 in a state where the electronic device unit 4 is inserted into the case 2 is provided on the front surface of the electronic device unit 4. The fixing button 8 is engaged with a fixing button bracket (not shown) provided on the case 2 to fix the electronic device unit 4. The fixed button 8 is locked when pressed, and is also called a ny latch. The electronic device unit 4 may be fixed to the case 2 using a special screw instead of the fixing button 8.

  As another example of the mechanism related to the insertion / extraction of the electronic device unit with respect to the case, in Patent Document 1, an engaging claw is provided in each of the lever having the grip portion and the lever holder on the other side thereof, and both the engaging claws are engaged. A mechanism is described in which the levers are locked together to release the engagement with an operation button.

  Further, Patent Document 2 describes a mechanism for inserting / removing a simple board, which is a part of an electronic device, not an electronic device unit, into a case such as a rack using a lever called a card plastic.

Japanese Patent Laying-Open No. 2004-54967 (paragraphs 0047-0059, FIGS. 7 and 8) JP 2000-138480 A (paragraphs 0002-0003, FIG. 9 and FIG. 10)

  The drawer-type electronic device shown in FIG. 6 uses two drawer handles 6 for pulling out the electronic device unit 4 and uses a fixing button 8 (or a special screw) for fixing the electronic device unit 4. Since it is a structure, there is a problem that the number of parts is large and therefore the structure is also complicated.

  The mechanism described in Patent Document 1 also has a structure using a pair of engaging claws for engaging the lever and an operation button for unlocking the lever in addition to the lever for inserting and removing the electronic device unit. However, there is a problem that the number of parts is large, and thus the structure is complicated.

  The mechanism described in Patent Document 2 uses a card plastic for simply inserting / removing a substrate. Such a mechanism is generally used for inserting / removing an electronic device unit that is generally much heavier than a simple substrate. Even if it is simply applied, there is a high possibility that the card plastic is easily disengaged due to the weight of the electronic device unit due to vibration or the like and the electronic device unit comes out of the case, resulting in lack of reliability.

  Accordingly, the present invention provides a highly reliable drawer-type electronic device that can be inserted into and removed from the case of the electronic device unit with a simple structure with a small number of parts, and that the electronic device unit does not come out of the case except when necessary. Is the main purpose.

  The drawer-type electronic device according to the present invention includes at least two gripping portions, a shaft hole provided at a position away from the gripping portion, and a contact end provided at a position away from the gripping portion and the shaft hole. An opening direction in which the gripping part of each drawer lever moves to the outside of the case by passing through the shaft provided at at least two places on the front end of the electronic device unit through the shaft hole of each drawer lever, In the state where the electronic device unit is inserted into a predetermined position in the case and fixed with the front cover covered, the tip and the abutment of the gripping portion of each drawer lever are attached. At least one of the ends is close to the front cover, which prevents the electronic device unit from being pulled out. Rotate the take-out lever in the opening direction using its gripping part, bring the contact end of each drawer lever into contact with the edge of the case and pull out the electronic device unit a predetermined distance with the contact part as a fulcrum, It is characterized in that it has a structure in which the electronic device unit can be further pulled out by grasping the grip portion of each drawer lever.

  According to the drawer-type electronic device, in a state where the electronic device unit is inserted into a predetermined position in the case and the case is covered with the front cover and fixed, at least one of the leading end and the abutting end of each pull-out lever is Since the electronic device unit comes close to the front cover, thereby preventing the electronic device unit from coming out, the electronic device unit will not come out of the case even if vibration or the like is applied. Therefore, the reliability is high even if a part for preventing the electronic device unit from coming out like the conventional fixed button is not particularly provided.

  On the other hand, when the front cover is removed, each drawer lever is rotated in the opening direction so that the abutting end of each drawer lever abuts the edge of the case and the lever acts as a fulcrum. The electronic device unit can be pulled out by a predetermined distance, and the electronic device unit can be further pulled out by grasping the grip portion of each drawer lever, so that there is no need to provide a conventional drawer handle. The unit can be pulled out easily.

  That is, each drawer lever (1) acts as an insulator when pulling out the electronic device unit, (2) also acts as a handle, and (3) the electronic device unit in a state where the case is fixed with a front cover covered. The pull-out levers perform these three functions.

  As described above, according to the present invention, each drawer lever is used both for pulling out the electronic device unit and for preventing the electronic device unit from being pulled out, and since each drawer lever has the above three functions, the number of parts is reduced. The electronic device unit can be inserted into and removed from the case with a small and simple structure, and the operation thereof is also easy.

  In addition, the electronic device unit does not come out of the case except when necessary, that is, in a normal use state where the case is covered with a front cover and fixed, so that the reliability is high.

  FIG. 1 is an external view showing an embodiment of a drawer-type electronic apparatus according to the present invention. FIG. 2 is a diagram illustrating a state in which the front cover of the drawer-type electronic device illustrated in FIG. 1 is removed. FIG. 3 is a diagram illustrating a state in which the front cover of the drawer-type electronic device illustrated in FIG. 1 is removed and the electronic device unit is extracted. Portions that are the same as or correspond to those in the conventional example shown in FIG. 6 are denoted by the same reference numerals, and differences from the conventional example will be mainly described below.

  4 and 5, the drawer-type electronic device is provided at the grip portion 22, the shaft hole 24 provided at a position away from the grip portion 22, and the position away from the grip portion 22 and the shaft hole 24. Two drawer levers 20 each having an abutting end 26 are rotatably attached to two upper and lower ends of the front surface of the electronic device unit 4. More specifically, each pull-out lever 20 has an elongated gripping portion 22 and its opposite end is branched into two, and has an axial hole 24 near one end thereof and the other end. Is a protrusion-like contact end 26, which has a shape close to a Y-shape. As such a drawer lever 20, for example, a commercially available product called a card plastic may be used.

  In this example, as shown in FIGS. 4 and 5, for example, one or a plurality of screws are provided at two upper and lower ends (the upper side is shown in FIGS. 4 and 5) of the front surface of the electronic device unit 4. Each of the mounting brackets 32 is attached to each other, and a shaft 30 is provided at the tip of each of the mounting brackets 32. The shaft 30 is passed through the shaft hole 24 of each drawer lever 20, whereby the gripping portion 22 of each drawer lever 20 is provided. The drawer levers 20 are attached so as to be rotatable in the opening direction (in the direction of arrow A in FIG. 5) in which they move to the outside of the case 2 and in the opposite closing direction. A commercially available product in which the drawer lever 20 and the mounting bracket 32 are assembled in advance may be attached to the electronic device unit 4.

  In this example, the case 2 has a brim-like edge 3 projecting outward at the peripheral edge of the front surface thereof.

  In this example, the electronic device unit 4 has a substrate 5 mounted with electronic components (not shown) such as a display, a variable resistor, and a switch on the front surface thereof. The support member for the substrate 5 is not shown.

  As shown in FIG. 4, this drawer-type electronic device has the electronic device unit 4 inserted into a predetermined position in the case 2 (in this example, the position where the connectors 16 and 18 are coupled to each other), and the case 2 has a front surface. In the state where the cover 10 is covered and fixed with the fixing screw 14 (the state shown in FIG. 1), each drawer lever 20 is rotated in the closing direction naturally by the weight of the grip portion 22 or by the front cover 10. In this example, both the front end of the gripping portion 22 and the contact end 26 of each drawer lever 20 are close to the front cover 10, thereby preventing rotation of each drawer lever 20 in the opening direction and electronic equipment. It has a structure in which the unit 4 is prevented from coming out in the direction of arrow B (see FIGS. 3 and 5).

  In the above case, the front end of the gripping portion 22 and the contact end 26 of each drawer lever 20 may be in contact with the front cover 10, or there may be a small gap, and it is essential that they are close to each other. If they are in contact with each other, a slight pull-out of the electronic device unit 4 can be more reliably prevented. Further, as in this example, when the tip of the gripping portion 22 and the contact end 26 of each drawer lever 20 are close to the front cover 10, the electronic device unit 4 is more reliably prevented from being pulled out. Although it is more preferable, it is preferable that at least one of the front end of the grip portion 22 and the contact end 26 be close to the front cover 10 in order to prevent the electronic device unit 4 from coming out.

  In addition, as shown in FIG. 5, in the drawer-type electronic device, when the front cover 10 is removed (the state shown in FIG. 2), each drawer lever 20 is used with its gripping portion 22 (for example, with a finger). By rotating in the opening direction shown by the arrow A, the contact end 26 of each drawer lever 20 is brought into contact with the edge 3 of the case 2 and the contact portion (that is, the contact between the contact end 26 and the edge 3). The electronic device unit 4 can be pulled out by a predetermined distance in the direction of arrow B (shown in FIG. 5), and the electronic device unit 4 is held by holding the grip portion 22 of each drawer lever 20. Furthermore, it has a structure that allows it to be pulled out. An electronic device unit 4 a in FIG. 3 indicates an electronic device unit that is completely pulled out from the case 2.

  Note that the edge 3 of the case 2 with which the contact end 26 of each drawer lever 20 abuts may be other than the above example, for example, a brim-like one projecting inside the case 2.

  According to the drawer-type electronic device, in a state where the electronic device unit 4 is inserted into a predetermined position in the case 2 and the case 2 is covered with the front cover 10 and fixed with the fixing screw 14, the grip portion 22 of each drawer lever 20. Since the leading end and the abutting end 26 are close to the front cover 10, thereby preventing the rotation of each drawer lever 20 in the opening direction and preventing the electronic device unit 4 from being pulled out, vibrations and the like are generated. Even if added, the electronic device unit 4 does not come out of the case 2. Therefore, the reliability is high even if a part for preventing the electronic device unit 4 from coming off, such as a conventional fixing button or a special screw, is not particularly provided.

  On the other hand, in a state where the front cover 10 is removed, by rotating each drawer lever 20 in the opening direction, the contact end 26 of each drawer lever 20 is brought into contact with the edge 3 of the case 2 so that the contact portion thereof is The electronic device unit 4 can be pulled out for a predetermined distance by the action of the lever as a fulcrum, and the electronic device unit 4 can be further pulled out by grasping the grip portion 22 of each pull-out lever 20. The electronic device unit 4 can be easily pulled out without particularly providing anything.

  That is, each drawer lever 20 (1) acts as an insulator when the electronic device unit 4 is pulled out, (2) also serves as a handle, and (3) a state in which the case 2 is further covered with the front cover 10 and fixed. Then, the electronic device unit 4 is prevented from coming out, and each drawer lever 20 performs these three functions.

  Therefore, according to this drawer-type electronic device, each drawer lever 20 is used for both pulling out the electronic device unit 4 and preventing the electronic device unit 4 from being pulled out, and each drawer lever 20 has the above three functions. The electronic device unit 4 can be inserted into and removed from the case 2 with a simple structure with a small number of parts, and the operation thereof is also easy. Further, the cost can be reduced by simplifying the structure.

  Moreover, since the electronic device unit 4 does not come out of the case 2 except when necessary, that is, in a normal use state where the case 2 is covered with the front cover 10 and fixed, the reliability is high.

  The drawer lever 20 is preferably provided at two upper and lower ends of the front surface of the electronic device unit 4 as in the above example, but may be provided at other locations or at three or more locations. In addition, the drawer-type electronic device as described above may be used in a vertical arrangement as in the illustrated example, or may be used in a horizontal arrangement.

  In addition, the above example is an example in which one electronic device unit 4 is accommodated in one case 2, but the present invention is not limited thereto, and an electronic device having the above-described drawer lever 20 in one case 2. Two, three, or more device units 4 may be stored. In that case, one front cover 10 is usually attached to one case 2. If the front cover 10 is large, a plurality of fixing screws 14 may be provided.

  The electronic device unit 4 may be other than the protective relay unit, for example, a measuring instrument unit, a controller unit, or the like. In that case, the drawer-type electronic device is more specifically called a drawer-type measuring instrument, a drawer-type controller, or the like.

1 is an external view showing an embodiment of a drawer-type electronic device according to the present invention. It is a figure which shows the state which removed the front cover of the drawer type electronic device shown in FIG. It is a figure which shows the state which removed the front cover of the drawer type electronic device shown in FIG. 1, and extracted the electronic device unit. It is the schematic which expands and shows the drawer lever vicinity (P part vicinity) of the state which covered the front cover like FIG. FIG. 4 is an enlarged schematic view showing the vicinity of the drawer lever (near P portion) in a state where the front cover is removed and the drawer lever is opened as shown in FIG. 3. It is an external view which shows an example of the conventional drawer-type electronic device.

Explanation of symbols

2 Case 3 Edge 4 Electronic device unit 10 Front cover 14 Fixing screw 20 Drawer lever 22 Grip part 24 Shaft hole 26 Abutting end 30 Axis

Claims (1)

In a drawer-type electronic device comprising a case, an electronic device unit that is detachably accommodated in the case, and a front cover that is fixed over the front surface of the case,
At least two drawer levers each having a grip portion, a shaft hole provided at a position away from the grip portion, and a contact end provided at a position away from the grip portion and the shaft hole are provided on the front surface of the electronic device unit. By passing the shafts provided at at least two locations of the end of each of the levers through the shaft holes of the respective drawer levers, the gripping portions of the respective drawer levers can be rotated in the opening direction in which they move to the outside of the case and in the opposite closing direction. In the state where the electronic device unit is inserted into a predetermined position in the case and the case is covered with the front cover and fixed, at least one of the leading end and the abutting end of each pull-out lever is close to the front cover. As a result, the electronic device unit is prevented from being pulled out, and when the front cover is removed, each drawer lever is opened using its grip. The electronic device unit is pulled out a predetermined distance using the contact portion as a fulcrum while the contact end of each drawer lever contacts the edge of the case. A drawer-type electronic device having a structure in which the device unit can be further pulled out.

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