JP6708774B2 - Printer - Google Patents

Description

The present invention relates to a printer having a storage chamber for storing a roll body in which a strip-shaped print medium is wound in a roll shape.

2. Description of the Related Art Conventionally, as a roll body in which a band-shaped print medium is wound in a roll shape, for example, a portable printer is known in which a storage chamber for storing roll paper is formed (for example, Patent Document 1). In the printer described in Patent Document 1, a roll paper holder is provided behind a substantially box-shaped interior of a main body frame and covered with an openable/closable cover frame. That is, it is described that the printer has a double structure of a roll paper holder and a main body frame.

JP 2012-206278 A

Since the conventional portable printer adopts the double structure as described in Patent Document 1, the rigidity of the printer housing can be increased as compared with the case of the single structure. However, the adoption of the double structure increases the weight of the printer, and it may be difficult to obtain the mobility required for the portable printer.

In view of the above-mentioned viewpoints, an object of the present invention is to provide a printer that can realize weight reduction while ensuring the rigidity of the printer housing.

One embodiment of the present invention is a printer in which a storage chamber for storing a roll body in which a band-shaped print medium is wound in a roll is formed, and a first opening is provided to configure a part of the storage chamber. A frame, a main body case provided outside the frame and forming at least a part of a bottom surface of the storage chamber, and a first protrusion provided in the main body case and protruding toward the first opening. And, the frame is fixed to the main body case, the first projecting portion projects to a position facing the peripheral edge of the first opening, and the top surface of the first projecting portion is The printer is curved so as to have a concave shape along the bottom surface of the storage chamber, and the concave shape is formed along the outer peripheral surface of the roll body.

According to the printer described above, it is possible to realize the weight reduction while ensuring the rigidity of the printer housing.

FIG. 3 is a perspective view of the printer of the embodiment. FIG. 3 is a perspective view of the printer according to the embodiment with the open/close cover open. FIG. 3 is an exploded perspective view showing the schematic configuration of the housing of the printer of the embodiment. FIG. 3 is a diagram for explaining a paper feeding route of the printer of the embodiment. The bottom view of the frame of the printer of an embodiment. The perspective view seen from the bottom side of the frame of the printer of an embodiment. FIG. 3 is a plan view of the main body case of the printer of the embodiment. FIG. 3 is a perspective view showing a state where the main body case and the frame of the printer of the embodiment are connected to each other. FIG. 3 is a plan view showing a state in which the main body case and the frame of the printer of the embodiment are connected to each other. Sectional drawing which shows the BB cross section in FIG. The enlarged view of the E section of FIG.

(1) Overall Configuration of Printer The overall configuration of a portable printer, which is an embodiment of the present invention, will be described below with reference to FIGS.
FIG. 1 is a perspective view of the printer 1 of this embodiment. FIG. 2 is a diagram showing a perspective view of the open/close cover 5 of the printer 1 of the present embodiment in an open state together with a roll paper RP which is an example of a roll body. FIG. 3 is an exploded perspective view showing a schematic configuration of the housing of the printer 1 of this embodiment. FIG. 4 is a diagram for explaining the paper feed route of the printer 1 of the present embodiment.

The printer 1 of the present embodiment is a portable printer for accommodating a roll paper (an example of a roll body) in which a strip-shaped continuous paper (an example of a printing medium) is wound in a roll shape and printing on the printing surface of the continuous paper. Is. As shown in FIG. 1, the printer 1 has a rectangular parallelepiped shape as a whole.
As shown in FIG. 3, the printer 1 has a frame in which a front cover 2 and a main body case 3 are fixed to each other by screws (not shown), and a functional unit FU is mounted between the front cover 2 and the main body case 3. 4 is sandwiched, and the functional unit FU is protected thereby. The frame 4 is fixed to the main body case 3 with screws (not shown).

Further, as shown in FIGS. 1 to 3, the front cover 2 includes an opening push button 11, a display unit 19, an operation button group 20 including operation buttons 20a and 20b, and a power switch 21, which will be described later. An opening/closing cover 5 that opens or closes the storage chamber SP that stores the roll paper RP is attached.
The opening push button 11 is a button for opening the opening/closing cover 5. The display unit 19 is a screen that displays operation commands, messages, and the like, and is configured by, for example, an LCD (Liquid Crystal Display). The operation buttons 20a and 20b are buttons for the operator to instruct the operation of the printer 1. The power switch 21 is a button for turning the power of the printer 1 on or off.

As shown in FIGS. 1 and 3, the main body case 3 is connected to the front cover 2 so as to face the opening/closing cover 5, and forms a printer housing together with the front cover 2. As shown in FIG. 3, a frame 4 in which the functional unit FU of the printer 1 is installed is fastened to the main body case 3 with screws (not shown). As shown in FIGS. 1 to 3, the battery cover 12 is attached to the main body case 3 in an openable and closable state. The battery cover 12 is an open/close cover for the battery housing 42 (see FIG. 3) of the frame 4 that houses a battery (not shown) that is a power source.

As shown in FIG. 2, the roll paper RP used in the printer 1 is a strip-shaped continuous paper CP wound in a roll shape, and is stored in the storage chamber SP when the open/close cover 5 of the printer 1 is in an open state. It is accommodated (loaded) by the drop-in method. According to the drop-in method, the roll paper RP can be easily loaded from top to bottom with respect to the support shaft defined by the roll paper guide portions 6 and 6'provided in the storage chamber SP. .
In the example of the present embodiment, the roll paper RP has no core material, and the strip-shaped continuous paper CP is wound so as to have a cylindrical hollow portion with a predetermined diameter to form the roll paper RP.
The continuous paper CP is provided with meter-reading slips at predetermined intervals along the longitudinal direction. Adjacent meter reading cards on the continuous paper CP are separated by perforations. Although not shown, each meter-reading slip is composed of print areas corresponding to a plurality of 3 or 4 slips, and adjacent print areas are separated by perforations. Further, on the back surface of the printing surface of the continuous paper CP, along the longitudinal direction, the print reference position of each meter-reading slip (that is, the print reference position of the first vote) and the print area of each of the second and subsequent votes. The position detection marks M and M'indicating the print reference position are formed. The position detection marks M and M′ are rectangular marks printed in black on the back surface of the printing surface of the continuous paper CP. In each meter-reading slip, different position detection marks may be provided at the print reference position of the first slip and the print reference position of the print area of each slip after the second slip.
On the printing surface of the continuous paper CP, a thermosensitive coloring layer that forms a specific color when reaching a predetermined temperature region is formed.

As shown in FIGS. 2 and 3, the frame 4 forms a part of the storage chamber SP for the roll paper RP. Further, the frame 4 is provided with a pair of roll paper guide portions 6 and 6 ′ that support side portions (that is, both end faces in the width direction) of the roll paper RP in the storage chamber SP from both sides. The roll paper guide portions 6 and 6'guide both side surfaces of the roll paper RP while making the roll paper RP rotatable.

As shown in FIG. 3, the functional unit FU includes a thermal head 15, a gear group 16, a stepping motor 17, and a circuit board 18. The thermal head 15 is provided so as to face the platen roller 14 when the open/close cover 5 is closed, and prints by applying heat to the thermosensitive coloring layer on the printing surface of the continuous paper CP conveyed by the platen roller 14. It has a heating element. The circuit board 18 is mounted with a controller for controlling a printing operation and an electronic circuit for driving the stepping motor 17 for transporting the continuous paper CP and driving a heating element of the thermal head 15.

The open/close cover 5 is an open/close cover for opening/closing the storage chamber SP, and is pivotally supported by the open/close shaft 51 by a hinge or the like. The open/close cover 5 is biased by the torsion springs 52, 52′ (see FIG. 4) arranged along the open/close shaft 51 so as to be in an open state.
As shown in FIG. 2, the opening/closing cover 5 is provided with a platen roller 14 in the vicinity of an end portion on the opposite side of the opening/closing shaft 51 along an axis parallel to the opening/closing shaft 51. The platen roller 14 is a conveying unit that conveys the continuous paper CP fed from the roll paper RP.

Side pieces 54, 54 ′ are provided at both ends of the opening/closing cover 5. By making the open/close cover 5 in the closed state, the connecting spaces 53, 53' (see FIG. 2) can be closed. The connecting spaces 53, 53' are spaces for engaging the platen roller gear 141 of the platen roller 14 with the gear group 16 (see FIG. 3) when the open/close cover 5 is in the closed state. By engaging the platen roller gear 141 with the gear group 16, the platen roller 14 becomes operable and printing can be performed on the printing surface of the continuous paper CP.

As shown in FIGS. 2 and 4, the opening/closing cover 5 is provided with a sensor group 13 including a sensor 13a and a sensor 13b on the surface facing the paper passage route when the opening/closing cover 5 is in the closed state. .
The sensor 13a is, for example, a sensor for detecting a print reference position (that is, one of the position detection marks M and M'of the continuous paper CP) of each meter reading slip, and is a reflection type optical sensor. The reflection type optical sensor includes a light emitting unit and a light receiving unit (not shown). The light emitting unit emits light toward the back surface of the printing surface of the continuous paper CP, and the light receiving unit is reflected from the back surface of the printing surface. Receives light (reflected light). The light receiving section photoelectrically converts the reflected light into an electric signal according to its light intensity (that is, the amount of light received per unit time), and outputs the electric signal to a control section (not shown) in the circuit board 18. Since the level of the reflected light, that is, the signal level output to the control unit, differs between the reflected light from the black position detection mark and the reflected light from the surface other than the position detection mark (for example, the white surface), The presence or absence of the position detection mark can be discriminated by the unit.
Different from the roll paper RP shown in FIG. 2, the sensor 13b has a label of a label when a plurality of labels are arranged on a strip-shaped mount and are temporarily attached to the roll paper. It is used to specify the start position of sticking. For example, a sensor for detecting the presence or absence of a label (that is, a position where the label is temporarily attached on the mount, or a position between adjacent labels where the label is not attached temporarily). , A transmissive optical sensor. The transmissive optical sensor has a light-receiving part and a light-emitting part (not shown) provided on the label sticking surface side and the back surface side of the mount, respectively. Of the emitted light, and the light receiving unit receives the light (transmitted light) of the component that passes through the mount or the mount and the label. The light receiving section photoelectrically converts the transmitted light into an electric signal corresponding to the light intensity, and outputs the electric signal to the control section in the circuit board 18. Since the level of the transmitted light, that is, the signal level output to the control unit, differs between the part where the label is attached and the part where the label is not attached on the mount, the label attachment start position depends on the control unit. Can be specified.
The control unit in the circuit board 18 controls the print timing based on the signal level output from the reflective sensor or the transmissive sensor.

As shown in FIG. 2, the cover inner surface 55 of the opening/closing cover 5 includes a curved surface 55a along the axis of the platen roller 14 and a guide surface 55b. The sensors 13a and 13b described above are attached to the guide surface 55b of the inner surface 55 of the cover. Further, the transport guide portion 22 is fixed to the frame 4. A wall surface 22a and a guide surface 22b are formed on the transport guide portion 22.

FIG. 4 shows a part of a schematic side cross section of the printer 1 when the roll paper RP is accommodated and the opening/closing cover 5 is in the closed state. In FIG. 4, the paper feed route when the roll paper RP is inserted into the storage chamber SP of the printer 1 in a state where the continuous paper CP is wound counterclockwise in a side view of the printer 1 is indicated by a thick line.

As shown in FIG. 4, when the open/close cover 5 is in the closed state, the curved surface 55a of the open/close cover 5 and the wall surface 22a of the transport guide portion 22 constitute a part of the inner wall of the storage chamber SP, and the open/close cover is formed. The guide surface 55b of No. 5 and the guide surface 22b of the transport guide portion 22 are arranged to face each other with a slight gap. This gap serves as a paper passage route for the continuous paper CP fed from the roll paper RP from the storage chamber SP toward the platen roller 14. In the paper passage route, the sensors 13a and 13b are installed on the guide surface 55b of the open/close cover 5 in the gap, and when the continuous paper CP passes through the gap, one of the position detection marks M and M′ is detected. Detect.

As shown in FIG. 4, when the roll paper RP is inserted into the storage chamber SP of the printer 1 while the continuous paper CP is wound counterclockwise in the side view of the printer 1, the roll paper RP is continuously fed from the roll paper RP. The front end of the paper CP moves toward the platen roller 14 along the wall surface 22a of the transport guide portion 22 and the gap between the guide surface 22b and the guide surface 55b. Here, since the guide surface 22b and the guide surface 55b are angled on the side opposite to the winding direction of the roll paper RP with respect to the wall surface 22a, the continuous paper CP wound counterclockwise is formed. Curling is suppressed while moving toward the platen roller 14.
In the printer 1 of the present embodiment, the continuous paper CP fed from the roll paper RP is conveyed to the platen roller 14 by the paper passage route shown in FIG. 4, and the continuous paper CP is sandwiched between the platen roller 14 and the thermal head 15. Print on each meter reading slip. At this time, printing is performed on each meter-reading slip while deciding the printing timing based on one of the position detection marks M and M′ detected by the sensor 13a.

(2) Configuration of Frame 4 As shown in FIGS. 1 and 3, in the printer 1 of this embodiment, a printer housing is formed by the main body case 3 and the front cover 2. The frame 4 is arranged between the front cover 2 and the main body case 3, that is, in the printer housing.
Hereinafter, the configuration of the frame 4 will be described with reference to FIGS. 2, 3, 5, and 6.
FIG. 5 is a bottom view of the frame 4 of the printer 1 of this embodiment. FIG. 6 is a perspective view of the frame 1 of the printer 1 according to the present embodiment as viewed from the bottom side.

As shown in FIGS. 5 and 6, the frame 4 includes a front portion 4A that forms the battery housing 42 and mounts the functional unit FU, and a rear portion 4B that forms the accommodation chamber SP. In the following description, in FIG. 2, when the direction of the central axes of the roll paper guide portions 6 and 6 ′ is horizontal, the side where the display unit 19 and the power switch 21 are provided is the front of the printer 1. That is, the side where the accommodation chamber SP is provided is called the rear of the printer 1.
As shown in FIG. 6, a rectangular opening 42a is formed in the bottom of the battery housing 42 provided in the front portion 4A of the frame 4. Further, a battery insertion opening 42b for inserting a battery is formed on a side portion of the battery housing 42 (on the side where the battery cover 12 is provided in the printer 1). As shown in FIGS. 5 and 6, on the front side of the battery housing 42, in order to define the battery housing 42, a plate-like portion 42c that is linear in a plan view is formed.
As shown in FIGS. 3 and 6, the front portion 4A of the frame 4 is provided with a mounting portion for mounting the functional unit FU such as the gear group 16, the stepping motor 17, and the circuit board 18.

As shown in FIGS. 2 and 6, the bottom portion 43 of the storage chamber SP is formed in the rear portion 4B of the frame 4. The bottom surface 43 of the storage chamber SP faces the opening/closing cover 5 when the opening/closing cover 5 is in a closed state, and is curved in an arc shape so as to be concave toward the opening/closing cover 5. An opening 43a is provided in a part of the bottom surface 43 of the storage chamber SP for weight reduction. That is, the peripheral edge of the opening 43a is formed on a part of the bottom surface 43 of the storage chamber SP.
The rear portion 4B of the frame 4 is provided with guide mounting portions 41, 41' for mounting a pair of roll paper guide portions 6, 6'for supporting the side portions of the roll paper RP from both sides in the storage chamber SP. There is.
As shown in FIG. 5, through holes 46 and 46 ′ are formed in the bottom surface 43 of the accommodation chamber SP to attach the frame 4 to the main body case 3, and a guide attachment is required to attach the frame 4 to the front cover 2. Through holes 47, 47' are formed outside the portions 41, 41'.

In the frame 4, the opening 43a provided in the rear portion 4B is an example of the first opening, and the opening 42a provided in the front portion 4A is an example of the second opening.

(3) Configuration of Main Body Case 3 Next, the configuration of the main body case 3 of the printer according to the present embodiment will be described with reference to FIG. 7. FIG. 7 is a plan view of the main body case 3 of the printer 1 of this embodiment.
As shown in FIG. 7, the main body case 3 includes rib groups 31, 32 protruding from the bottom surface 30, a rectangular rib 33, and a horizontal rib 34. As shown in FIG. 2, the main body case 3 is provided outside the frame 4.

The rib group 31 is provided in the horizontal direction of the printer 1 (that is, in the direction in which the axis of the roll paper RP stored in the storage chamber SP is directed) and in the vertical direction of the printer 1. The vertical ribs 31a to 31f are provided. The rib group 31 is an example of a first protrusion. As shown in FIG. 7, the horizontal ribs 31u and 31v are arranged in parallel in the vertical direction with a space therebetween. Each of the vertical ribs 31a to 31f is sequentially arranged between the horizontal ribs 31u and 31v with a predetermined distance in the horizontal direction. The rectangular shape formed by the horizontal ribs 31u and 31v and the vertical ribs 31a and 31f of the rib group 31 matches the shape of the peripheral edge of the opening 43a of the frame 4.
As will be described later, the vertical ribs 31a to 31f are curved so as to be concave along the bottom surface 43 of the storage chamber SP provided in the frame 4, and the concave shape is along the outer peripheral surface of the roll paper RP. Is formed.

The rectangular rib 33 is a rib that extends in the longitudinal direction of the battery housing 42 of the frame 4 when the main body case 3 is assembled with the frame 4 and projects from the opening 42a of the battery housing 42 of the frame 4 to mount the battery. .
The rib group 32 includes vertical ribs 32a to 32g protruding forward from a horizontal rib 33a corresponding to a long side in front of the rectangular rib 33. FIG. 7 shows an example in which the vertical ribs 32a to 32g are arranged so as to be separated from each other by a predetermined distance.
The horizontal rib 33a and the vertical ribs 32a to 32g of the rectangular rib 33 are an example of a second protrusion.

The horizontal rib 34 is formed so as to extend in parallel with the horizontal rib 33a of the rectangular rib 33 and the relatively short vertical ribs 32a to 32g. As will be described later, the horizontal rib 34 has a predetermined length from the ends of the vertical ribs 32a to 32g so that the flat plate-shaped portion 42c of the frame 4 fits between the ends of the vertical ribs 32a to 32g and the horizontal rib 34. They are provided in front of each other by a distance.
The horizontal rib 34 is an example of a third protrusion.

The mounting holes 35, 35 ′ are mounting holes for mounting the front cover 2 on the body case 3. For example, by inserting a screw downward from a through hole (not shown) of the front cover 2 and fitting the screw into the mounting holes 35, 35 ′, the front cover 2 is connected to the main body case 3. Further, as will be described later, the mounting holes 36, 36' are provided corresponding to the through holes 46, 46' of the frame 4 for mounting the frame 4 on the body case 3. Each mounting hole is threaded.

(4) Connection Structure of Main Body Case 3 and Frame 4 Next, the connection structure of the main body case 3 and the frame 4 will be described with reference to FIGS.
FIG. 8 is a perspective view showing a state where the main body case 3 and the frame 4 of the printer 1 of the present embodiment are connected. FIG. 9 is a plan view showing a state where the main body case 3 and the frame 4 of the printer 1 of the present embodiment are connected. FIG. 10 is a sectional view showing a BB section in FIG. 9. FIG. 11 is an enlarged view of part E in FIG.
The BB cross section of FIG. 9 is a cross section slightly inclined to the front side of the printer 1 with respect to the front-rear direction surface A of the printer 1.

As shown in FIG. 8, the screws 37, 37 ′ are inserted into the through holes 47, 47 ′ of the frame 4 from the bottom to the top, and are fitted into the mounting holes (not shown) of the front cover 2, The frame 4 is connected to the front cover 2. Further, the screws are inserted into the through holes 46, 46 ′ of the frame 4 from the top to the bottom and fitted into the mounting holes 36, 36 ′ of the body case 3, so that the frame 4 is connected to the body case 3. ..

As shown in FIGS. 7 to 9, when the main body case 3 and the frame 4 are connected to each other, the rib group 31 of the main body case 3 which is located below the main body case 3 protrudes from the opening 43a of the frame 4, whereby the rib group is formed. The vertical ribs 31a and 31f and the horizontal ribs 31u and 31v of 31 are engaged with the peripheral edge of the opening 43a.
The vertical ribs 31a to 31f of the rib group 31 are curved so as to be concave along the bottom surface 43 of the storage chamber SP, and the concave shape is formed along the outer peripheral surface of the roll paper RP. Therefore, in a state where the main body case 3 and the frame 4 are connected to each other, the top surfaces of the vertical ribs 31a to 31f of the rib group 31 and the bottom surface 43 of the storage chamber SP are integrated with each other to roll the roll paper RP in the storage chamber SP. Place it. That is, the main body case 3 constitutes a part of the accommodation chamber SP.
According to the connecting structure of the main body case 3 and the frame 4 of the present embodiment, the weight of the frame 4 can be reduced by the opening 43a of the frame 4, and the main body case 3 protruding from the opening 43a while engaging with the peripheral edge thereof. The rib group 31 can prevent the rigidity of the connecting structure between the main body case 3 and the frame 4 from decreasing.

As shown in FIGS. 10 and 11, when the main body case 3 and the frame 4 are connected, the plate-shaped portion 42c (see FIG. 6) of the battery housing 42 of the frame 4 has vertical ribs 32a to It fits between the tip of 32 g and the horizontal rib 34. Thereby, the front part 4A of the frame 4 (that is, the part where the battery housing 42 is provided) is reliably positioned in the front-rear direction.
In addition, the positioning function of the front portion 4A of the frame 4 in the front-rear direction can be realized by means other than providing the vertical ribs 32a to 32g of the body case 3. For example, the lateral rib 33a of the rectangular rib 33 may be formed wide in the front direction, and the plate-shaped portion 42c may be fitted by the lateral rib 33a and the lateral rib 34.

In the cross-sectional view of FIG. 10, in addition to the main body case 3 and the frame 4, a cross section of the exterior of the battery 8 is also shown. As shown in this cross-sectional view, in the printer 1 of the present embodiment, the battery housing 42 of the frame 4 is provided with the opening 42a, and the rectangular rib 33 of the main body case 3 projects from the opening 42a. The battery 8 is placed on. Therefore, the weight of the printer 1 can be reduced by the opening 42a, and the rigidity of the connecting structure of the main body case 3 and the frame 4 can be prevented from being lowered by the rectangular rib 33.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited to the above embodiments. Further, the above-described embodiment can be variously modified and changed without departing from the gist of the present invention. Further, the plurality of technical matters described in the above embodiments can be combined as appropriate.
For example, in the above-described embodiment, the case where the print medium is the roll paper in which the meter-reading slip is divided into perforations and the strip-shaped continuous paper is wound into a roll is described, but the print medium is not limited to that case. Absent.
As described above, the print medium may be roll paper obtained by winding a continuous paper, in which a plurality of labels are temporarily attached at regular intervals on one surface (labeling surface) of the mount paper, in a roll shape. In this case, the label-attached surface of the continuous paper is coated with a release agent such as silicone so that the label can be easily released.
Alternatively, the print medium may be a strip-shaped continuous paper provided with a thermosensitive coloring layer on the printing surface and an adhesive layer formed on the back surface of the printing surface (a label without a backing paper), or a journal paper. You may.

In the above-described embodiment, the case where the bottom surface 43 of the storage chamber SP is formed in the frame 4 and the opening 43a is provided as the first opening in the bottom surface 43 has been described, but the shape of the opening 43a is shown in FIG. It is not limited to the rectangular shape illustrated in FIG. The shape of the opening 43a may be any shape. The weight of the frame 4 can be reduced even if the opening 43a has any shape.

In the above-described embodiment, the case where the rib group 31 as the first protruding portion is provided on the bottom surface 30 of the main body case 3 has been described, but the rib group 31 does not necessarily have to be provided. If the ribs are not provided, the overall rigidity is lower than that of the printer 1 of the present embodiment, but the rear portion is compared with the front portion of the printer 1 where heavy components such as the battery 8 and the functional unit FU are concentrated. Since the weight is relatively light, even if the rigidity of the rear portion of the printer 1 is reduced by providing the opening 43a in the rear portion 4B of the frame 4, the reduction in rigidity is within a practically acceptable level.

In the above-described embodiment, the case where the rib group 31 of the main body case 3 engages with the peripheral edge over the entire circumference of the opening 43a of the frame 4 has been described, but the main body is configured to engage with the peripheral edge of a part of the opening 43a. The rib of the case 3 may be formed. For example, in FIG. 7, the ribs of the main body case 3 are formed so that only the portions connecting the vertical ribs 31a, 31b, 31e, 31f and the horizontal ribs 31u, 31v that connect the vertical ribs 31a, 31b are engaged with the opening 43a. May be.

In the above-described embodiment, a preferable example in which the opening 42a as the second opening is provided in the bottom portion of the battery housing 42 is disclosed for further weight reduction. However, the opening 42a is not provided in the battery housing 42. Not required.
In the above-described embodiment, the case where the rectangular rib 33 that protrudes from the opening 42a and on which the battery 8 is mounted is formed in the main body case 3 as the second protruding portion has been described. The portion 3 is not limited to a rectangular rib. It suffices if the battery 8 can be placed. Therefore, instead of the rectangular rib 33, for example, the battery 8 is placed on a rib group composed of two or more linear ribs arranged in the vertical direction or the horizontal direction. Alternatively, a plurality of protrusions scattered in a region defined by the rectangular ribs 33 of FIG. 7 may be provided on the bottom surface 30 of the body case 3 in place of the rectangular ribs 33, and the battery 8 may be mounted on the plurality of protrusions. It may be placed.

In the above-described embodiment, the horizontal ribs 33a of the rectangular ribs 33 as the second protrusions and the relatively short vertical ribs 32a to 32g extend in the longitudinal direction of the battery housing 42 as a whole, and the horizontal ribs as the third protrusions. The case where the rib 34 is formed so as to extend parallel to the horizontal rib 33a and the vertical ribs 32a to 32g has been described. That is, in the second protruding portion and the third protruding portion in the present embodiment, the plate-shaped portion 42c of the battery housing 42 that is linear in plan view is fitted (engaged) between the protruding portions (that is, between the ribs). As shown in FIG. However, the plate-shaped portion 42c is not necessarily limited to the linear shape, and may have an arbitrary polygonal line or curved shape. In that case, the form of the 2nd protrusion part and the 3rd protrusion part is defined according to the form of plate-like part 42c.

In the present embodiment, an example in which the thermal head 15 is used to print by applying heat to the thermosensitive coloring layer of the continuous paper CP has been described, but the present invention is not limited to this. The printer may be a printer that performs printing by another method such as a method using an ink ribbon or an inkjet method.
In the above-described embodiment, the rib is mentioned as an example of the first to third protrusions, but it is not limited thereto. For example, the first to third protrusions do not have to be strip protrusions such as ribs, and may have protrusions of any shape as long as they engage the peripheral edge of the opening 43a. For example, the shape may be such that the entire area of the opening 43a or a part of the area is raised.

DESCRIPTION OF SYMBOLS 1... Printer 2... Front cover 3... Main body case 30... Bottom surface 31... Rib group 32... Rib group 33... Rectangular rib 34... Horizontal ribs 35, 35'... Mounting hole 36, 36'... Mounting hole 4... Frame 41, 41 '... Guide mounting portion 41S... Guide mounting surface 42... Battery housing 43... Housing chamber bottom surface 46, 46'... Through hole 47, 47'... Through hole 5... Open/close cover 51... Open/close shaft 52, 52'... Torsion spring 53 , 53'... Connection space 54, 54'... Side piece 55... Cover inner surface 6, 6'... Roll paper guide portion 8... Battery 11... Opening push button 12... Battery cover 13... Sensor group 13a, 13b... Sensor 14 ... platen roller 141 ... platen roller gear 15 ... thermal head 16 ... gear group 17 ... stepping motor 18 ... circuit board 19 ... display section 20 ... operation button group 20a, 20b ... operation button 21 ... power switch 22 ... conveyance guide section 37, 37'... Screw FU... Functional unit SP... Storage chamber RP... Roll paper CP... Continuous paper M, M'... Position detection mark

Claims (14)

A printer in which an accommodating chamber for accommodating a roll body in which a strip-shaped print medium is wound into a roll is formed,
A frame provided with a first opening and forming a part of the accommodation chamber;
A main body case which is provided outside the frame and constitutes at least a part of the bottom surface of the storage chamber;
A first protrusion provided on the main body case and protruding toward the first opening;
The frame is fixed to the main body case,
The first projecting portion projects to a position facing the peripheral edge of the first opening,
A printer in which a top surface of the first protruding portion is curved so as to have a concave shape along a bottom surface of the storage chamber, and the concave shape is formed along an outer peripheral surface of the roll body. The printer according to claim 1, wherein a plurality of the first protrusions are provided. The said 1st protrusion part provided in plurality contains the 1st part extended in the direction to which the axis|shaft of the said roll body was directed, and the 2nd part extended in the direction orthogonal to the said direction. Printer described in. The printer according to claim 1, wherein the first protrusion includes a portion having a closed shape. The printer according to claim 1, wherein an outer surface of the first protruding portion and a peripheral surface of the frame in the first opening face each other. A printer in which an accommodating chamber for accommodating a roll body in which a strip-shaped print medium is wound into a roll is formed,
A frame provided with a first opening and forming a part of the accommodation chamber;
A main body case which is provided outside the frame and constitutes at least a part of a bottom surface of the storage chamber,
The main body case has a first protrusion that protrudes toward the first opening,
The frame is fixed to the main body case,
The first projecting portion projects to a position facing the peripheral edge of the first opening,
The frame includes a battery housing that accommodates a battery that supplies power to the printer, a second opening is provided in a bottom portion of the battery housing, and the main body case projects from the second opening. A printer having a second protrusion on which the battery is placed. The second protrusion extends in the longitudinal direction of the battery housing, and the main body case includes a third protrusion formed to extend in parallel with the second protrusion. 7. The printer according to claim 6, wherein the frame has a plate-like portion that is engaged between the second protrusion and the third protrusion. The printer according to claim 6, wherein the first protrusion includes a portion having a closed shape. 9. The printer according to claim 6, wherein an outer surface of the first projecting portion and a peripheral surface of the frame in the first opening face each other. A printer in which an accommodating chamber for accommodating a roll body in which a strip-shaped print medium is wound into a roll is formed,
A frame having a first surface for supporting the roll body from below among the surfaces defining the storage chamber, wherein the first surface is provided with a first opening,
A main body case provided outside the frame,
The frame is fixed to the main body case,
A first protrusion provided on the main body case and protruding toward the first opening;
The first projecting portion projects to a position facing the peripheral edge of the first opening,
A printer in which a top surface of the first protrusion is formed along the first surface. The printer according to claim 10, wherein a plurality of the first protrusions are provided. The said 1st protrusion part provided in plurality contains the 1st part extended in the direction to which the axis|shaft of the said roll body was directed, and the 2nd part extended in the direction orthogonal to the said direction. Printer described in. The printer according to claim 10, wherein the first protrusion includes a portion having a closed shape. 14. The printer according to claim 10, wherein an outer surface of the first protruding portion and a peripheral surface of the frame in the first opening face each other.