JP2016149422A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of being kept small in size and preventing a cost from increasing even if a fireproof enclosure is provided.SOLUTION: A tape printer 1 comprises a power source circuit 41 which is mounted on a power source substrate 32 and a fireproof enclosure E covering a fireproof object area 45 of the power source circuit 41. The fireproof enclosure E includes a first enclosure E1 covering the fireproof object area 45 from one surface side of the power source substrate 32 and a second enclosure E2 covering the fireproof object area 45 from the other surface side of the power source substrate 32. The first enclosure E1 is composed of a spacer 33 interposed between the power source substrate 32 and a main substrate 34. The second enclosure E2 is composed of a bottom wall part 57 of a battery storage part 31.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electronic device having a fireproof enclosure that covers a non-LPS range (fireproof area) of a power supply circuit.

Conventionally, a printer having a circuit board unit is known as this type of electronic device (see Patent Document 1).
The circuit board unit includes a circuit board having a plurality of circuit elements mounted on the surface, and two metal plates (aluminum) on the front and back sides as a fireproof enclosure disposed so as to sandwich the circuit board. An engaging portion is formed on the metal plate on the back side, and a positioning hole for engaging with the engaging portion is formed on the circuit board. The circuit board and the two metal plates are fixed to each other in a positioning state by a plurality of screws. The circuit board and the two metal plates are fixed to the mechanical frame of the printer with a plurality of screws in a tightened state.

JP 2004-103907 A

By the way, in an electronic device using a secondary battery not equipped with LPS (Limited Power Source) as a power source, a portion where a high-voltage current flows in the power circuit (non-LPS range: fire-protected area) is covered with an enclosure, and safety standards are set. It is necessary to satisfy.
In the conventional circuit board unit, since the two metal plates constituting the fireproof enclosure are dedicated parts, a space for the metal plate is required. For this reason, there is a problem that the apparatus (printer) is increased in size and the cost is increased.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device that can maintain a small size and does not increase cost even if a fireproof enclosure is provided.

  An electronic device according to the present invention is an electronic device having a power circuit mounted on a first board and a fireproof enclosure that covers a fireproof area of the power circuit, and the fireproof enclosure is one of the first boards. A first enclosure that covers the fire-protected area from the surface side, and a second enclosure that covers the fire-protected area from the other surface side of the first substrate. The first enclosure overlaps the first substrate and the first substrate. It is characterized by comprising at least a part of a spacer interposed between two substrates.

  In this case, it is preferable that the 2nd enclosure is comprised by at least one part of the bottom wall part in the battery accommodating part which accommodates a battery.

  According to these configurations, the first enclosure can also be used as a spacer interposed between the first substrate and the second substrate. Further, the second enclosure can also be used as the bottom wall portion of the battery housing portion. That is, the fireproof enclosure can be shared with other components. Therefore, even if a fireproof enclosure is provided, the size can be maintained and the cost does not increase.

  In this case, the first enclosure has a first protrusion that surrounds the fire-protected area and contacts one surface of the first substrate, and the second enclosure surrounds the fire-protected area and on the other surface of the first substrate. It is preferable to have the 2nd protrusion part which touches.

  According to this configuration, a large gap does not occur between the first enclosure and the second enclosure and the first substrate. For this reason, electronic components can be arranged intensively without being restricted by the arrangement of electronic components in the fire-protected area, and the fire-protected area (non-LPS range) can be made as narrow as possible.

  Moreover, it is preferable that a battery accommodating part has a pair of hook part latched so that a 1st board | substrate may be held.

  According to this configuration, the battery accommodating portion (second enclosure) and the first substrate are integrated by the hook portion, and the first substrate and the second substrate are integrated via the spacer (first enclosure). Accordingly, the battery housing part (second enclosure), the first substrate, the spacer (first enclosure), and the second substrate can be unitized (assembled). In this state, these components can be incorporated into the device case or the device frame.

  Furthermore, it is preferable that the first enclosure and the second enclosure include a flame retardant resin.

  According to this configuration, the first enclosure and the second enclosure can be easily formed (molded) in accordance with the fire-protected area (non-LPS range). The first enclosure (spacer) functions as a heat insulating material and can shield heat from the first substrate of the second substrate.

  In addition, it is preferable that a printing unit that performs printing on the printing tape is further provided and operated by hand.

  According to this configuration, even if a fireproof enclosure is provided because a secondary battery is used as a power source, the size can be maintained and the cost does not increase. In particular, downsizing is useful for hand-held operation.

It is the external appearance perspective view which looked at the tape printer concerning an embodiment from the slanting upper part. It is the external appearance perspective view which looked at the tape printer concerning an embodiment from the slanting lower part. It is sectional drawing of the longitudinal direction of the tape printer which concerns on embodiment. They are the perspective view (a) which looked at the power supply part assembly from diagonally upward, and its disassembled perspective view (b). They are the perspective view (a) which reversed the power supply part assembly back and forth, and was seen from diagonally downward, and its disassembled perspective view (b).

  Hereinafter, a case where an electronic apparatus according to an embodiment of the present invention is applied to a tape printer will be described with reference to the accompanying drawings. This tape printing apparatus creates a label for displaying a cable system in a terminal block, for example, and is formed in a small vertically long shape so that it can be held and operated at a work site. A tape cartridge equipped with a printing tape is detachably attached to the tape printer, and the tape printer prints while drawing out the printing tape from the tape cartridge and creates a label by separating the printed portion of the printing tape. To do.

[Overall configuration of tape printer]
FIG. 1 is an external perspective view of the tape printer as viewed from obliquely above, FIG. 2 is an external perspective view of the tape printer as viewed from diagonally below, and FIG. 3 is a longitudinal sectional view of the tape printer. As shown in these drawings, the tape printing apparatus 1 is connected to the main mechanism portion 2 on the distal end side that is formed thick and wide, and the base end side of the main mechanism portion 2, and is thinner and narrower than the main mechanism portion 2. The handling part 3 thus formed and the handle part 4 connected to the base end side of the handling part 3 are formed vertically and integrally. The tape printer 1 formed in a vertically long shape is held and operated by the handling unit 3 with one hand or both hands. The tape printer 1 is carried using the handle portion 4.

  On the front side of the main mechanism unit 2, a display unit 7 is provided widely, and a sub-keyboard unit 8 is provided adjacent to the display unit 7. Further, the main mechanism portion 2 is provided with a cartridge mounting portion 10 for detachably mounting the tape cartridge 9, and an open / close lid 11 for opening and closing the cartridge mounting portion 10 (FIG. 3). In the present embodiment, the display unit 7 and the sub keyboard unit 8 are provided on the front side of the opening / closing lid 11. Further, around the cartridge mounting part 10, a printing part 13 for feeding out the printing tape 12 from the tape cartridge 9 and printing on it is built in (see FIG. 3).

  On the left side surface of the main mechanism unit 2, a tape discharge port 15 through which a printed portion of the printing tape 12 is discharged by the printing unit 13 is provided. Further, a cutter 16 for cutting off the printed portion of the printing tape 12 is built in between the tape outlet 15 and the cartridge mounting portion 10 (see FIG. 1). Further, a viewing window 17 is provided in the vicinity of the tape discharge port 15 for visually recognizing the tape cartridge 9 mounted on the cartridge mounting portion 10. On the other hand, a power connector 18 is provided on the right side surface of the main mechanism portion 2 (see FIG. 2).

  On the front side of the handling unit 3, a main keyboard unit 21 on which character keys 22 and cursor keys 23 are arranged is provided (see FIG. 1). The handling unit 3 has a built-in power supply assembly 25 including the battery housing unit 31, and a battery lid 27 that opens and closes the battery housing unit 31 is provided on the rear surface of the handling unit 3. Further, a USB connector 28 is provided on the right side surface of the handling unit 3 (see FIG. 2).

[Power supply assembly]
Next, the power supply assembly 25 will be described with reference to FIGS. 4 and 5. 4 and 5 are perspective views (disassembled perspective views) of the power supply assembly 25 as viewed from opposite sides. In the description of the power supply assembly 25, the upper side of the drawing is “upper” and the lower side is “lower” following FIGS. 3, the right side on the drawing is “right”, the left side is “left”, the front side is “front”, and the back side is “back” (the reverse is true in FIG. 5).

  As shown in FIGS. 4 and 5, the power supply assembly 25 includes a battery housing portion 31 disposed at the uppermost position, and a power supply substrate 32 (first substrate) disposed below the battery housing portion 31. A spacer 33 disposed below the power supply substrate 32 and a main substrate 34 (second substrate) disposed below the spacer 33 are provided. The battery housing part 31, the power supply board 32, the spacer 33, and the main board 34 are integrated (assembled) by screws or the like, and in this state, the four mounting boss parts 36 formed in the battery housing part 31 provide a device case. 5 (see FIGS. 2 and 4).

  A power supply circuit 41 including a power supply electronic component 42 and a connector 43 is mounted on the power supply board 32. In a portion where a high voltage current flows in the power supply circuit 41, a fire-protected area 45 that requires physical fire prevention measures is set. The fire-protected area 45 is a so-called non-LPS range, and the fire-protected area 45 according to the present embodiment has a deformed “T” shape in a plane, and irregularities that match the electronic component 42 and the like in the height direction (vertical direction). The shape is formed.

  In this embodiment, a fireproof enclosure E is provided to cover the fireproof area 45 from both upper and lower (front and back) surfaces. The fireproof enclosure E includes a first enclosure E1 disposed below the power supply board 32, And a second enclosure E2 disposed on the upper side of the power supply substrate 32. And the 1st enclosure E1 is comprised by the spacer 33, and the 2nd enclosure E2 is comprised by the battery accommodating part 31 (it mentions later for details). That is, the spacer 33 also serves as the first enclosure E1, and the battery housing portion 31 also serves as the second enclosure E2. The spacer 33 and the battery housing portion 31 are formed of a flame-retardant resin (synthetic resin). .

  The battery accommodating portion 31 is configured such that a rechargeable battery and a dry battery can be alternatively mounted. The battery housing part 31 has a main body housing part 51 whose upper surface and front surface are open, and a back cover part 52 that covers the back side of the main body housing part 51 (see FIG. 3). A rechargeable battery or a dry battery is detachably accommodated in the main body accommodating portion 51, and a detection switch 53 for detecting attachment of the rechargeable battery is disposed in the back cover portion 52.

  The main body accommodating portion 51 has a pair of side walls 61, a bottom wall 62, and a partial back wall 63, and the back cover portion 52 has a back wall 64, a deep bottom wall 65, and a partial side wall 66 (FIG. 5 ( b)). Then, the pair of side walls 61 of the battery housing part 31 is configured by the pair of side walls 61 of the main body housing part 51 and the partial side wall 66 of the back cover part 52. Similarly, the back wall portion 56 of the battery housing portion 31 is configured by the partial back wall 63 of the main body housing portion 51 and the back wall 64 of the back cover portion 52. Further, the bottom wall 62 of the battery housing part 31, part of which constitutes the second enclosure E <b> 2, is constituted by the bottom wall 62 of the main body housing part 51 and the back bottom wall 65 of the back cover part 52 (FIG. 4). (See (b) and FIG. 5 (b)).

  The bottom wall portion 57 is formed by a bottom wall main body 71 serving as a bottom plate of the battery housing portion 31 and a bottom wall protrusion 72 (second protrusion) protruding downward from the bottom wall main body 71. The bottom wall protrusion 72 is formed in a deformed “T” shape when viewed from below, and is formed by the bottom wall protrusion 72 and a part of the bottom wall body 71 including the recessed portion surrounded by the bottom wall protrusion 72. The second enclosure E2 located above the power supply board 32 is configured. That is, in a state where the power supply board 32 is incorporated in the battery housing part 31, the lower end of the bottom wall protruding part 72 abuts on the upper surface of the power supply board 32, and the bottom wall part 57 of the battery housing part 31 constituting the second enclosure E2 The fire-protected area 45 is covered.

  In addition, a pair of hook portions 74 are integrally formed on the pair of side wall portions 55 of the battery housing portion 31. Each hook portion 74 extends downward from the lower outer side of the side wall portion 55, and the pair of hook portions 74 are engaged so as to hold the power supply substrate 32 from both the left and right sides. Although details will be described later, the power supply substrate 32 is fixed to the spacer 33 from above, and the main substrate 34 is fixed to the spacer 33 from below. Therefore, the power supply substrate 32 is locked to the battery housing portion 31 by the pair of hook portions 74, and the battery housing portion 31, the power supply substrate 32, the spacer 33, and the main substrate 34 are integrated (assembled).

  The spacer 33 is integrally formed (molded) with four spacer boss portions 81 located at four corners and a main body spacer portion 82 connecting the four spacer boss portions 81. Of the four spacer boss portions 81, the three spacer boss portions 81 are screwed to the power supply substrate 32 from the upper side and the main substrate 34 from the lower side, respectively. Further, the power supply substrate 32 is screwed to the remaining one spacer boss 81 from above.

  A deformed “T” -shaped spacer protrusion 84 (first protrusion) is formed on the upper surface of the main body spacer portion 82 as viewed from above. A first enclosure E <b> 1 positioned below the power supply substrate 32 is configured by the spacer protruding portion 84 and a part of the main body spacer portion 82 including the recessed portion surrounded by the spacer protruding portion 84. In other words, in a state where the power supply board 32 is incorporated in the spacer 33, the upper end of the spacer protrusion 84 abuts on the lower surface of the power supply board 32, and the fire-protected area 45 is covered by the spacer 33 constituting the first enclosure E1. .

  A pair of positioning protrusions 86 are formed on the upper surface of the main body spacer portion 82. The pair of positioning protrusions 86 are inserted into the pair of positioning holes 97 of the power supply substrate 32, and the power supply substrate 32 is positioned with respect to the spacer 33. Similarly, a pair of positioning protrusions 86 are formed on the lower surface of the main body spacer portion 82. The pair of positioning protrusions 86 are inserted into a pair of positioning holes 97 of the main board 34 to be described later, and the main board 34 is positioned with respect to the spacer 33.

  The power supply board 32 is formed with a pair of left and right hook receiving portions 91 at both end portions. Each hook receiving portion 91 is formed in a “U” shape in accordance with the shape (cross-sectional shape) of the hook portion 74 of the battery accommodating portion 31. Thereby, when the hook portion 74 of the battery housing portion 31 is locked to the pair of hook receiving portions 91 of the power supply substrate 32, the bottom wall protrusion 72 of the battery housing portion 31 comes into contact with the power supply substrate 32, and the power supply substrate 32 is positioned in the vertical direction. Further, the hook portion 74 is engaged with the “U” -shaped hook receiving portion 91, whereby the power supply substrate 32 is positioned in the left-right direction and the depth direction.

  On the other hand, at the four corners of the power supply substrate 32, four first burr holes 92 for fastening the power supply substrate 32 to the spacer 33 are formed. The four upper fixing screws 93 for fastening the power supply substrate 32 to the spacer 33 are constituted by, for example, tapping screws.

  Similarly, at the three corners of the main board 34, three second fool holes 95 for fixing the main board 34 to the spacer 33 are formed. Also in this case, the three lower fixing screws 96 for fixing the main board 34 to the spacer 33 are constituted by, for example, tapping screws.

[Action / Effect]
As described above, according to the present embodiment, the fire-protected area 45 of the power supply substrate 32 is covered with the spacer 33 made of flame-retardant resin and the bottom wall portion 57 of the battery housing portion 31. That is. The fireproof enclosure E that covers the fireproof area 45 (non-LPS range) is configured by the spacer 33 that is the first enclosure E1 and the bottom wall portion 57 of the battery housing portion 31 that is the second enclosure E2. . Thereby, the 1st enclosure E1 and the 2nd enclosure E2 can be used as a shared component. Therefore, even if the fireproof enclosure E is mounted, the increase in size and cost of the tape printer 1 can be suppressed.

  In addition, since the bottom wall protrusion 72 of the battery housing 31 and the spacer protrusion 84 of the spacer 33 can cover the fire-protected area 45 (non-LPS range) with almost no gap, the electronic components in the fire-protected area 45 The electronic components 42 and the like can be intensively arranged without being limited by the arrangement and the like of 42.

  In addition, in this embodiment, although the battery accommodating part 31 was comprised by the main body accommodating part 51 and the back cover part 52, this can also be formed integrally.

  DESCRIPTION OF SYMBOLS 1 Tape printer, 13 Printing part, 25 Power supply assembly, 31 Battery accommodating part, 32 Power supply board, 33 Spacer, 34 Main board, 41 Power supply circuit, 45 Fireproof area, 51 Main body accommodating part, 52 Back cover part, 55 Side wall part, 57 Bottom wall part, 71 Bottom wall body, 72 Bottom wall projection part, 74 Hook part, 82 Body spacer part, 84 Spacer projection part, 91 Hook receiving part, E Fireproof enclosure, E1 First enclosure, E2 First 2 enclosures

Claims (6)

An electronic device having a power supply circuit mounted on a first substrate and a fireproof enclosure covering a fireproof area of the power supply circuit,
The fireproof enclosure is
A first enclosure covering the fire-protected area from one side of the first substrate;
A second enclosure that covers the fire-protected area from the other surface side of the first substrate,
The electronic device is characterized in that the first enclosure includes at least a part of a spacer interposed between the first substrate and a second substrate overlapping the first substrate.   The electronic device according to claim 1, wherein the second enclosure is configured by at least a part of a bottom wall portion in a battery housing portion that houses a battery. The first enclosure has a first protrusion that surrounds the fire-protected area and contacts one surface of the first substrate;
The electronic device according to claim 2, wherein the second enclosure includes a second protrusion that surrounds the fire-protected area and contacts the other surface of the first substrate.   The electronic device according to claim 2, wherein the battery housing portion includes a pair of hook portions that are locked so as to hold the first substrate.   5. The electronic apparatus according to claim 1, wherein the first enclosure and the second enclosure include a flame-retardant resin. A printing section for printing on a printing tape;
6. The electronic device according to claim 1, wherein the electronic device is operated by hand.

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