JP2009196306A - Printing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely perform an temporary fixing of a substrate while providing heat dissipating properties. <P>SOLUTION: A recessed part is provided in a bottom plate part, and the recessed part is brought into contact with a child substrate, and heat is dissipated from the child substrate. By dividing a substrate part into a main substrate and the child substrate, heat generated in the substrate part is dispersed, and even when only a part of the child substrate is brought into contact with the bottom plate part, an enough heat dissipating effect can be obtained. In addition, by providing the recessed part in the bottom plate part, a positioning pin for performing the temporary fixing of the child substrate on a body part is projected in the bottom plate part direction. Furthermore, by providing a harness fixing part in the neighborhood of the child substrate, a possibility of getting out of the child substrate from the body part is decreased when the harness is taken about. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a printing apparatus or the like that can temporarily fix a substrate while providing heat dissipation.

  Conventionally, various printing apparatuses have been proposed. For example, Patent Document 1 below describes a printing apparatus that can be connected to an external computer.

JP 2007-317157 A

When an element that generates heat exists in the substrate portion, it is necessary to dissipate the generated heat. As a heat dissipation method, it is conceivable that the substrate portion is brought into contact with a bottom plate portion that functions as a heat sink.
Further, the main body portion may be provided with positioning pins (bosses) in order to prevent positional displacement when the substrate portion is attached. The boss is inserted into a boss hole of the substrate portion when the substrate portion is attached to the main body portion.
Here, in order to make the said board | substrate part and the said bottom plate part contact, the height of the said boss | hub will be restrict | limited to the thickness of a board | substrate (refer FIG. 8). For this reason, the boss of the main body part may be detached from the boss hole of the board part due to vibration or the like generated during assembly.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a printing apparatus and the like that can ensure temporary fixing of a substrate while providing heat dissipation.

  A printing apparatus according to claim 1, which is an aspect of the present invention, includes a main body portion, a bottom plate portion that covers a bottom surface of the main body portion, and a first substrate portion positioned between the main body portion and the bottom plate portion. The body portion includes a screw hole for screwing the bottom plate portion and the first substrate portion, and a positioning pin for positioning the first substrate portion that is longer than the thickness of the first substrate portion. The bottom plate portion is made of a heat dissipating material, has a screw through hole corresponding to the screw hole of the main body portion, and a recess recessed toward the mounting side to the main body portion, The first substrate part has a screw through hole corresponding to the screw hole of the main body part and a pin through hole through which a positioning pin of the main body part passes, and the first board part and the bottom plate part are connected to the main body part. In the state attached to the bottom plate portion, the concave portion of the bottom plate portion contacts the first substrate portion, and Passes through the screw through hole in the bottom plate portion and the screw through hole in the first substrate portion and fits into the screw hole in the main portion, and the positioning pin of the main portion penetrates the first substrate portion. And projecting toward the non-recessed portion other than the recessed portion of the bottom plate portion.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the screw through hole is in the concave portion of the bottom plate portion.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, the main body portion has the first substrate portion in the vicinity of the mounting position of the first substrate portion. It has the fixing | fixed part for fixing a connection line, It is characterized by the above-mentioned.

  According to a fourth aspect of the present invention, in addition to the configuration of the invention according to any one of the first to third aspects, the printing device includes a second substrate portion, and the first substrate portion and the second substrate portion are provided. Each of the substrate portions includes a regulator that changes a voltage.

  As is apparent from the above description, in the printing apparatus according to claim 1, the first substrate portion contacts the recess of the bottom plate portion, and the positioning pin of the main body portion penetrates the first substrate portion and the bottom plate. By projecting toward the non-recessed portion of the portion, it is possible to ensure the temporary fixing of the substrate while providing heat dissipation. Further, as in the printing apparatus according to claim 2, the screw through hole may be configured to be in the concave portion of the bottom plate portion.

  According to a third aspect of the present invention, in addition to the effect of the first or second aspect of the invention, the printing apparatus has a fixing portion in the vicinity of the mounting position of the first substrate portion, whereby the first substrate portion is positioned with the positioning pin. In the temporarily fixed state, it is possible to prevent the first substrate portion from being displaced from the positioning pins and causing the first substrate portion to be displaced when the connection line is drawn. Further, the first substrate portion can be temporarily fixed more securely than the temporary fixing with only the positioning pins, and the possibility of failure when tightening the screw is reduced.

  According to a fourth aspect of the present invention, in addition to the effects of the first aspect of the present invention, the first substrate portion and the second substrate portion each include a regulator. Compared with the case where there is only one section, the heat generated by the regulator can be dispersed, and heat can be radiated more efficiently.

  A printing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a printing apparatus and a connected computer according to the present embodiment.
As shown in FIG. 1, the printing apparatus 1 of the present embodiment is connected to a computer 100. At this time, the computer 100 and the printing apparatus 1 are connected via a USB (Universal Serial Bus) and / or a LAN (Local Area Network).
The computer 100 and the printing apparatus 1 can transmit and receive various types of information. Further, the printing apparatus 1 can perform printing control based on a signal transmitted from the computer 100.

  The printing apparatus 1 basically includes a main body portion, a bottom plate portion, and a substrate portion. The bottom plate portion constitutes the bottom surface of the printing apparatus 1. The bottom plate portion is attached to the main body portion by screwing. The substrate part is attached to the main body part by screwing. Further, the substrate portion is attached by screws used for screwing the bottom plate portion. That is, one screw passes through the screw through hole provided in the bottom plate portion, passes through the screw through hole provided in the substrate portion, and fits into the screw hole in the main body portion.

FIG. 2 is a schematic perspective view of the printing apparatus 1 as viewed from the front. As shown in FIG. 2, the main body portion 2 of the printing apparatus 1 includes a cover portion 3, a button portion 4, and a discharge portion 5.
The cover part 3 is configured to be openable and closable. The cover unit 3 covers a roll sheet holder storage unit (not shown) in the closed state. A roll sheet holder to be described later is attached to the roll sheet holder storage unit.
The button unit 4 is provided with a power button and various operation buttons.
The printed roll sheet is discharged from the discharge unit 5.

  The roll sheet holder includes a rolled roll sheet. The printing apparatus 1 performs predetermined printing on a roll sheet. At this time, a platen roller and a thermal head (not shown) are used. Since the printing operation by the platen roller and the thermal head is a known technique, the description is omitted.

  Various roll sheets that can be printed by a platen and a thermal head can be used. For example, a long heat-sensitive sheet having a self-coloring property (so-called thermal paper), a long heat-sensitive sheet in which a release paper is bonded to one side of the heat-sensitive sheet via an adhesive, and the heat-sensitive sheet are formed. A die-cut label sheet can be used. In addition, encoder marks may be formed at predetermined intervals on the back surface of the roll sheet. The encoder mark is read by a mark detection sensor (not shown) included in the printing apparatus 1.

  In the roll sheet holder, a sheet discriminating portion is disposed at a predetermined position. The sheet discriminating portion is provided with a sensor hole for indicating the type of roll sheet wound around the roll sheet holder. The sensor hole is detected by a sheet discrimination sensor (not shown) included in the printing apparatus 1. The sheet discrimination sensor can be constituted by, for example, a push type micro switch.

  Further, the printing apparatus 1 includes a cutter (not shown) that cuts a printed roll sheet, and a lever that is used to attach and detach the roll sheet holder. Since these elements are well-known, description is abbreviate | omitted.

  Note that the external shape of the printing apparatus 1 shown in FIG. 2 is merely an example in the present invention, and it is needless to say that the present invention is not limited to the printing apparatus 1 having the external shape.

FIG. 3 is a schematic perspective view of the printing apparatus 1 as viewed from the back side. As shown in FIG. 3, the main body 2 of the printing apparatus 1 has a cover shaft portion 6. The cover part 3 is opened and closed with the cover shaft part 6 as an axis.
Further, the rear portion of the printing apparatus 1 includes a USB connector portion 7, a LAN connector portion 8, a serial connector portion 9, and a power connector portion 10.

A USB cable is connected to the USB connector unit 7. It can be connected to other devices via a USB cable. A LAN cable is connected to the LAN connector unit 8. It can be connected to other devices via a LAN cable. An RS-232C standard cable is connected to the serial connector unit 9. It can be connected to other devices via a serial cable. A power cord is connected to the power connector 10. Power is supplied to the printing apparatus 1 via the power cord.
A cable other than the standard shown in FIG. 3 may be connected.

  The printing apparatus 1 includes a CPU, a ROM, a flash memory, a RAM, an input / output interface (I / F), a communication interface, and the like. Moreover, these elements are provided in the board | substrate part mentioned later. These elements are connected to each other by a bus line and can transmit and receive data. Further, a regulator for adjusting the voltage is provided on the substrate portion.

  The ROM stores various programs and data. The CPU performs various calculations based on various programs stored in the ROM. The flash memory stores various data. Further, the stored contents can be retained even when the power is turned off. The RAM temporarily stores various calculation results calculated by the CPU. Various sensors and various drive circuits are connected to the input / output I / F. The communication I / F is connected to the connector used for the above-described communication.

  As described above, the printing apparatus 1 according to the present embodiment can be connected to other devices via a LAN. For this reason, a circuit for LAN connection (hereinafter referred to as “network specification circuit”) is required on the substrate portion of the printing apparatus 1. The board portion increases the current consumption by providing the network specification circuit. As the current consumption increases, the amount of heat generated by the substrate increases.

  The heat generated in the substrate unit may adversely affect various circuits provided in the substrate unit. Further, a circuit configuration in which heat is intensively generated at a predetermined location on the substrate portion is not desirable. Therefore, it is necessary to have a configuration in which the heat generated in the substrate portion is dispersed and the generated heat is radiated.

  Since the main factor of heat generation is the regulator, in this embodiment, the board portion is divided into a main board and a sub board, and a regulator is provided on each board. Thereby, the emitted-heat amount of a board | substrate part can be disperse | distributed. Moreover, although it is possible to provide a fan for heat dissipation, it is not preferable from the viewpoint of cost. In addition, it is necessary to secure an installation space for installing the fan inside the main body 2.

FIG. 4 shows a power supply system of the printing apparatus 1 of the present embodiment. Note that the power supply system shown in FIG. 4 is obtained by extracting only parts necessary for the description of the present invention.
As shown in FIG. 4, in the printing apparatus 1 of the present embodiment, the board portion is divided into a power supply board 41, a main board 42, and a sub board 43.

Power is supplied to the power supply board 41 via the power supply connector unit 10.
A power supply voltage of “8 V” is supplied from the power supply board 41 to the child board 43. The supplied power supply voltage is converted from “8V” to “5V” by the regulator of the sub board 43.
Then, a power supply voltage of 5 V is supplied from the sub board 43 to the main board 42. The supplied power supply voltage is converted from “5V” to “3.3V” by the regulator of the main board 42. The power supply voltage converted to 3.3 V is supplied to a desired element on the main board.
Note that the voltage values shown in FIG. 4 are merely examples, and the present invention is not limited to this.

With the above-described configuration, a desired voltage can be acquired using a plurality of regulators, and the amount of heat generated in the substrate unit can be dispersed as compared with a configuration that directly converts from “8 V” to “3.3 V”. .
The amount of heat generated on the sub board 43 may adversely affect the internal elements of the main body 2 including the sub board 43. Therefore, in the present embodiment, in order to dissipate the heat from the child board 43, the bottom plate portion functions as a heat sink for the child board 43.

FIG. 5 is a schematic perspective view of the printing apparatus viewed from the bottom. As shown in FIG. 5, the bottom plate portion 11 is screwed with screws 51 to 54.
Here, the baseplate part 11 has heat dissipation by being comprised with a metal etc. FIG. Further, the periphery of the screw 51 has a recessed portion that is recessed toward the main body. The main body device side of the recess comes into contact with the daughter board 43.
In addition, a recess including the end of the bottom plate portion 11 is formed around the screws 52 to 54.

  FIG. 6 is a schematic perspective view of the printing apparatus viewed from the bottom. FIG. 6 shows a state where the bottom plate portion is removed. As shown in FIG. 6, the power supply board 41 and the main board 42 are screwed to the main body 2. Further, the sub board 43 has screw through holes 44. The screw 51 passes through the screw through hole 44.

  Further, the main body 2 has a positioning pin 30. Further, the daughter board has a positioning pin hole. The positioning pin 30 penetrates the positioning pin hole. As shown in FIG. 6, the positioning pin 30 protrudes toward the bottom surface portion in a state where the substrate portion is attached to the main body portion 2.

  FIG. 7 is a cross-sectional view in a state in which the daughter board 43 is screwed (jointly fastened) to the main body 2 together with the bottom plate 11. The positioning pin 30 penetrates through the daughter board 43 and protrudes toward the bottom plate portion 11 (shaded portion in FIG. 7). Further, a part of the sub board 43 is in contact with the concave portion of the bottom plate portion 11 (dotted line portion in FIG. 7). Thereby, the heat generated in the child substrate 43 can be radiated by the bottom plate portion 11.

  In the above configuration, only a part of the sub board 43 contacts the bottom plate part 11 (not all parts of the sub board 43 come into contact), but the heat generated in the board part is the main board as described above. 42 and the sub-substrate 43, a sufficient heat dissipation effect can be obtained. Therefore, it is not necessary to bring the entire surface of the child board into contact with the heat radiating plate (bottom plate portion) (see FIG. 9), and the height of the positioning pin is not limited to the height of the child board (see FIG. 10). .

  Therefore, the sub board 43 can be temporarily fixed to the main body 2 with the positioning pins 30 protruding from the sub board 43. For this reason, when the sub board 43 is fastened together with the bottom plate 11 and the main body 2 with screws, the screw cannot be inserted straight and the sub board 43 is not displaced.

  In the above configuration, a connection line (harness) for connecting the sub board 43 and the main board 42 is required. Here, in the harness connecting step, the daughter board 43 and the harness are connected first, and the daughter board 43 is temporarily fixed to the main body 2 (that is, the positioning pins of the main body in the positioning pin holes of the daughter board 43). The harness (the other end) can be connected to the main board 42 in a state in which 30 is passed. At this time, when the harness is routed, there is a possibility that the sub board 43 may come off from the main body 2 (displacement occurs).

  In this embodiment, since the positioning pin 30 protrudes toward the bottom plate part 11 as described above, the child board 43 and the harness are connected first, and the child board 43 is temporarily fixed to the main body part 2. Even if force is applied to the sub board 43 by drawing the harness, the possibility that the sub board 43 is detached from the temporary fixing part of the main body 2 is reduced.

  However, depending on how the harness is routed, the sub board 43 may come off from the temporary fixing portion of the main body 2. Therefore, in the present embodiment, as shown in FIG. 6, the connection line fixing portion 31 is provided in the vicinity of the sub board 43.

  The connection line fixing part 31 has a notch, and the harness is fixed to the notch in a state where the daughter board 43 and the harness are connected and the daughter board 43 is temporarily fixed to the main body 2. Thereby, since the harness is fixed in the vicinity of the child substrate 43, it is possible to prevent the displacement of the child substrate 43 due to the harness routing. In addition, since the subsidiary board 43 can be temporarily fixed more securely than the positioning pins 30 alone, the possibility of failure when the screws are fastened together is reduced.

As described above, according to the present invention, since the concave portion is provided in the bottom plate portion and the concave portion is in contact with the sub board, the sub board can be radiated. Further, the heat generated in the substrate portion can be dispersed by dividing the substrate portion into the main substrate and the sub substrate. Thereby, even if it is the structure in which only a part of the sub board is in contact with the bottom plate part, a sufficient heat dissipation effect can be obtained. In addition, by providing a recess in the bottom plate portion, a positioning pin for temporarily fixing the daughter board to the main body portion can be projected in the direction of the bottom plate portion. As a result, the subsidiary board can be surely temporarily fixed. Furthermore, by providing the harness fixing part in the vicinity of the child board, it is possible to reduce the possibility that the child board is detached from the main body part when the harness is routed. Further, the bottom plate part and the sub board can be securely fastened together with the screw to the main body part without causing a displacement of the sub board when screwing.
Therefore, this invention can ensure temporary fixation of a board | substrate, providing heat dissipation.

  In addition, this invention is not limited to this embodiment, Of course, various improvement and deformation | transformation are possible within the range which does not deviate from the summary of this invention. In the present embodiment, the bottom plate portion is screwed in the concave portion, but may be screwed in a portion other than the concave portion. Further, the configuration of the present invention is applicable not only to a printing apparatus but also to other electrical devices.

1 is a schematic configuration diagram of a printing apparatus and a connected computer in an embodiment of the present invention. 1 is a schematic perspective view of a printing apparatus as viewed from the front direction according to an embodiment of the present invention. 1 is a schematic perspective view of a printing apparatus viewed from the back side in an embodiment of the present invention. 1 is a diagram illustrating a power supply system of a printing apparatus according to an embodiment of the present invention. 1 is a schematic perspective view of a printing apparatus viewed from the bottom surface according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of the printing apparatus as viewed from the bottom surface according to the embodiment of the present invention. It is sectional drawing of the sub-board | substrate and the main-body part 2 in one Embodiment of this invention. It is a figure which shows a mode that the height of the conventional positioning pin is restrict | limited to the height of a board | substrate. It is the figure which showed the structure which all the parts of the conventional board | substrate contact a bottom-plate part. It is a figure which shows a mode that the height of the conventional positioning pin is restrict | limited to the height of a board | substrate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing device 2 Main-body part 11 Bottom plate part 30 Positioning pin 31 Connection line fixing | fixed part 43 Sub board | substrate 44 Screw through hole 51 Screw

Claims (4)

A printing apparatus having a main body, a bottom plate covering the bottom of the main body, and a first substrate located between the main body and the bottom plate,
The main body is
A screw hole for screwing the bottom plate portion and the first substrate portion;
A positioning pin for positioning the first substrate portion, which is longer than the thickness of the first substrate portion;
The bottom plate portion is
Consists of materials that can dissipate heat,
A screw through hole corresponding to the screw hole of the main body,
Having a recess recessed toward the mounting side to the main body,
The first substrate unit includes
A screw through hole corresponding to the screw hole of the main body,
A pin through hole through which the positioning pin of the main body passes,
In the state where the first substrate part and the bottom plate part are attached to the main body part,
The concave portion of the bottom plate portion is in contact with the first substrate portion,
The screw passes through the screw through hole in the bottom plate part and the screw through hole in the first substrate part, and fits with the screw hole in the main body part,
The positioning pin of the main body portion protrudes toward the non-recessed portion other than the recessed portion of the bottom plate portion through the first substrate portion.
A printing apparatus characterized by that. The screw through hole is in the recess of the bottom plate portion,
The printing apparatus according to claim 1. The main body portion has a fixing portion for fixing a connection line of the first substrate portion in the vicinity of an attachment position of the first substrate portion.
The printing apparatus according to claim 1, wherein the printing apparatus is a printer. The printing apparatus includes a second substrate unit,
The first substrate unit and the second substrate unit each include a regulator that changes a voltage.
The printing apparatus according to claim 1, wherein the printing apparatus is a printer.

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