JP5829167B2 - Printer - Google Patents

Description

  The present invention relates to a printer for storing protection information such as accounting information which is difficult to be tampered with in a memory of a circuit board accommodated therein.

  A printer that prints various types of information is equipped with a circuit board on which a memory that stores data related to print contents and the like is mounted. In particular, in a printer connected to a device for processing accounting information such as a cash register, the accounting information is stored in the memory of the mounted circuit board.

  In order to securely protect accounting information from being tampered with, various printers are known in which a circuit board on which a memory is mounted is sealed so that the memory cannot be removed without breaking the seal.

  For example, in Patent Document 1, an interface board on which a memory for storing information input to a printer is mounted is supported by an interface board cover, and the interface board cover is fixed to a bottom plate provided at the bottom of the base frame with a sealing screw. The printer that has been described.

  In this printer, the memory on the interface board cannot be accessed from outside the printer unless the sealing screw is broken and the interface board cover is removed from the bottom plate. Protected.

  However, since the interface board and the memory mounted thereon can be removed from the inside of the base frame without removing the sealing screw, it cannot be said that the data stored in the memory is reliably protected. .

JP 2007-24291 A

  The problem to be solved by the present invention is that the memory mounted on the circuit board cannot be removed from the outside or inside of the printer body while maintaining the sealed state, and the protection information stored in the memory that does not want to be tampered with It is an object of the present invention to provide a printer that can reliably protect the printer.

The printer of the present invention is fixed to the printer main body having a printing function, a circuit board in which a memory for storing data including protection information is mounted and housed in the printer main body, and a frame of the printer main body with screws. In a printer having a circuit board case, a circuit board holder that holds the circuit board, and a regulating member that covers the head of the screw and prevents the operation of the screw, the circuit board mounts the memory A portion protruding from the frame of the printer body, the circuit board case houses a portion protruding from the frame of the circuit board, the circuit board holder includes a cylindrical portion penetrating the circuit board, and the memory A cover portion for covering, holding the circuit board by the cylindrical portion, and forming through holes in the cylindrical portion, the circuit board case, and the regulating member, respectively. And, it is fixed to both end portions of the wire inserted through the through holes in the sealing member.

  In the present invention, the protection information refers to information that should be protected, such as accounting information, that is difficult to be tampered with.

  According to the printer of the present invention, from the outside of the printer main body, it is necessary to remove the screw to remove the circuit board case, and to expose the memory mounted on the circuit board, it is necessary to cut the wire. Since the memory covered with the cover part of the circuit board holder cannot be accessed from the inside, the protection information stored in the memory on the circuit board can be reliably protected from being tampered with.

1 is a rear perspective view of a printer showing an embodiment of the present invention. 1 is a perspective view of a base frame and a circuit board case according to an embodiment of the present invention. 1 is a cross-sectional view of a main part of a printer showing an embodiment of the present invention. FIG. 4 is a partially enlarged view of FIG. 3.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a cash register printer 1 according to an embodiment of the present invention as seen from the back side.

  The printer 1 is connected to a register computer and rolls data related to product sales (product name, product price, taxable amount, sales date, salesperson name, etc.) input from the register computer with a built-in printing device. The printed portion is printed on a sheet of thermal paper, and the printed portion is issued as a receipt from the paper discharge outlet 2.

  The printer 1 includes a printer main body 3 having a printing function and a circuit board case 4 attached to the lower back of the printer main body 3.

  The printer main body 3 is formed in a substantially box shape by covering the outer surface of the frame including the base frame 5 (FIG. 2) and the upper frame with a printer cover 6. Although not shown, a printer, thermal paper, a cutter, and the like are accommodated above the base frame 5 in the printer main body 3.

  As shown in FIGS. 3 and 4, a bottom plate 7 is provided at the bottom of the base frame 5, and a circuit board 8 housed in the base frame 5 is fixed to the bottom plate 7 with a substrate set screw 9. The board set screw 9 can be removed from the inside of the printer main body 3 relatively easily.

  One end of the circuit board 8 protrudes from the rear side end of the base frame 5 to the outside. A circuit for performing various processes related to the printing function of the printer 1 is mounted on the board body 8 a housed in the base frame 5 of the circuit board 8.

  The protruding portion 8b protruding from the base frame 5 of the circuit board 8 has a circuit for connecting the printer 1 to a cash register computer, and a memory 10 for storing data including accounting information input from the cash register computer. Etc. are implemented.

  The circuit board 8 is formed with a fitting hole 11 at a boundary portion between the board body portion 8a and the protruding portion 8b. When the circuit board 8 is stored in the base frame 5, the circuit board 8 is positioned with respect to the base frame 5 by fitting the positioning protrusions 12 formed on the rear side end of the bottom plate 7 into the fitting holes 11. Then, the protruding portion 8b protrudes from the base frame 5 by an accurate length.

  The circuit board case 4 accommodates the protruding portion 8 b of the circuit board 8 inside and is fixed to the base frame 5.

  A terminal 25 for connecting a circuit on the circuit board 8 and a cash register computer is provided on the surface of the circuit board case 4 opposite to the base frame 5 (see FIGS. 1 and 2).

  An end surface of the circuit board case 4 on the base frame 5 side is opened, and a standing piece 13 is formed at the upper end of the open end surface. Then, the protruding portion 8b of the circuit board 8 is inserted into the inside from the opening end face of the circuit board case 4, and the plurality of screws 14 are screwed in from the outside with the upright pieces 13 overlapped on the back surface of the base frame 5, so Is fixed to the printer body 3.

  Note that the lower end of the circuit board case 4 is hooked on an engaging protrusion 24 formed on the lower end of the back surface of the base frame 5.

  On the upper surface of the circuit board case 4, a regulating member 15 that covers the head of at least one screw 14 and prevents its operation is attached.

  The regulating member 15 is positioned by engaging between a pair of holding pieces 30 formed by cutting and raising the circuit board case 4. A covering portion 16 that covers the head of the screw 14 from the back side and both sides is formed at the end of the regulating member 15.

  Therefore, unless the restricting member 15 is removed, the screw 14 cannot be turned off to separate the circuit board case 4 from the base frame 5 and expose the protruding portion 8b of the circuit board 8.

  Inside the circuit board case 4, the cylindrical portion 18 of the circuit board holder 17 penetrates and engages with a positioning hole 31 formed in the protruding portion 8 b of the circuit board 8. The intermediate portion of the cylindrical portion 18 has a large diameter so that the upper surface of the circuit board 8 is caught and does not come off. A through hole 18 ′ along the axial direction is formed at the center of the cylindrical portion 18.

  The circuit board holder 17 has a cover portion 19 that covers the memory 10 mounted on the upper surface of the circuit board 8. The cover portion 19 is formed by forming side walls 21 on both sides of the upper plate 20 that covers the upper side of the memory 10 and on the base frame 5 side, and the cylindrical portion 18 is integrally formed so as to penetrate the cover portion 19. .

  Therefore, unless the cylindrical portion 18 is pulled out from the circuit board 8, the cover portion 19 cannot be removed to expose the memory 10.

  Through holes 4 ′ and 4 ″ are formed in the upper surface portion and the lower surface portion of the circuit board case 4 at positions corresponding to the through holes 18 ′ of the cylindrical portion 18 in the vertical direction, and the through holes 15 are formed in the regulating member 15. 'Is formed.

Further, one wire 22 is passed through the through hole 15 ′ of the regulating member 15, the through holes 4 ′ and 4 ″ of the circuit board case 4, and the through hole 18 ′ of the cylindrical part 18, and both ends of the wire 22 are connected to each other. It is fixed with a sealing member 23 that cannot be removed.

  As described above, the circuit board 8, the circuit board holder 17 that penetrates the circuit board 8 and covers the memory 10, the circuit board case 4 that houses the circuit board 8, and the regulating member 15 that covers the screw 14 are connected to one wire 22. If the wire 22 is not cut, the restricting member 15 cannot be removed and the screw 14 cannot be removed, and the circuit board case 4 cannot be separated from the circuit board 8. The memory 10 cannot be exposed by removing 17.

  For this reason, until the damaged memory 10 is replaced or the battery for the memory 10 is regularly replaced, the wire 22 is cut and the circuit board case 4 is removed from the outside of the circuit board case 4. The memory 10 cannot be removed from the inside of the printer body 3.

DESCRIPTION OF SYMBOLS 1 Printer 2 Paper discharge port 3 Printer main body 4 Circuit board case 4 ', 4 "Through-hole 5 Base frame 6 Printer cover 7 Bottom plate 8 Circuit board 8a Substrate body part 8b Projection part 9 Substrate set screw 10 Memory 11 Fitting hole 12 Positioning Projection 13 Standing piece 14 Screw 15 Restriction member 15 'Through hole 16 Covering part 17 Circuit board holder 18 Cylindrical part 18' Through hole 19 Cover part 20 Upper plate 21 Side wall 22 Wire 23 Sealing member 24 Engaging protrusion 25 Terminal 30 Holding piece 31 Positioning hole

Claims (1)

A printer main body having a printing function, a circuit board on which a memory for storing data including protection information is mounted and housed in the printer main body, and a circuit board case fixed to the frame of the printer main body with screws In a printer having a circuit board holder for holding the circuit board and a regulating member that covers the head of the screw and prevents the operation of the screw.
In the circuit board, the mounting portion of the memory protrudes from the frame of the printer body,
The circuit board case stores a portion protruding from the frame of the circuit board,
The circuit board holder has a cylindrical part that penetrates the circuit board and a cover part that covers the memory, and holds the circuit board in the cylindrical part,
A printer comprising: a through hole formed in each of the cylindrical portion, the circuit board case, and the regulating member, and both ends of wires inserted through the through holes fixed by sealing members.