JP5594651B2 - Resin bonded body and portable printer - Google Patents

Description

  The present invention relates to a resin combined body in which a plurality of resin members are combined by fastening screws, and a portable printer having a casing formed of the resin combined body.

  Currently, housings of many devices are made of lightweight resin materials that are easy to manufacture and manufacture. A housing made of such a resin material may be connected to a plurality of resin members by fitting a large number of engagement structures, or detachably fastened using screws so that internal maintenance and inspection can be easily performed. (See, for example, Patent Document 1).

JP-A-9-53631

  By the way, in the equipment provided with the resin member as described above, for example, in order to save the capacity inside the equipment, the resin members may be fastened by using a flat head screw at the fastening portion of the screw described above. In this case, it is necessary to form a seating surface for embedding the head of the countersunk screw in the fastening portion of the resin member.

  In recent years, resin members tend to be thinner with the demand for smaller and lighter devices. When the seating surface is formed on the fastening part, the resin member is further thinned and the strength is lowered, and when the countersunk screw is screwed in and tightened, the seating surface and the surrounding part are expanded in the radial direction and penetrated. Damage or breakage tends to occur around the hole or screw hole. When breakage or breakage occurs, as the screw-in depth of the countersunk screw increases, push-spreading further progresses, and the contact area between the countersunk screw and the seating surface may decrease, resulting in insufficient bonding between the resin members.

  An object of the present invention is to reliably avoid a fastening failure due to a reduction in the contact area between a countersunk screw and a seating surface, and to reliably maintain the connectivity of two resin members, and a portable body equipped with the same Is to provide a type printer.

  In order to achieve the above object, the first invention uses a substantially rectangular tongue piece made of resin and an attachment member made of resin and to which the tongue piece is attached, using a first flat head screw. The tongue piece has a through hole provided with a substantially tapered seating surface for embedding and arranging the head of the first countersunk screw, The attachment member is in contact with the tongue piece when the tongue piece and the attachment member are fixed, and the first support part in which a first through hole for receiving the first countersunk screw is formed, and the tongue It is provided integrally with the first support portion so as to face the width direction of the piece, and at the time of fixing the tongue piece and the mounting member, with respect to both ends in the width direction of the tongue piece via predetermined gaps, respectively. Two opposing walls facing each other To.

  In the resin combined body of the first invention of the present application, a first flat head screw is inserted through the tongue piece and the mounting member. The first countersunk screw is screwed from the through hole of the tongue piece, passes through the first through hole of the first support portion of the mounting member, and is screwed into the screw hole formed in an appropriate member to be fastened.

  Here, when the first countersunk screw is screwed in by the installation operator, the head of the first countersunk screw compresses the tongue piece in the rotational direction in the screwing direction by friction (for example, clockwise) and the thickness direction. Power acts. The tongue piece is provided with a seating surface with which the head of the first countersunk screw comes into contact, and this seating surface is substantially tapered in accordance with the shape of the first countersunk screw. Therefore, at the time of screwing, a compressive force mainly acts on the tongue piece among the rotational force and the compressive force. As a result, in the tongue piece made of resin, there is a risk that the portion on the tip side of the tongue piece is broken or broken from the through hole that is a weak point of strength, and the portion is greatly expanded in the width direction of the tongue piece. In that case, as the depth to be screwed becomes deeper, the spreading spread further progresses. At this time, there is a possibility that the coupling between the tongue piece and the mounting member may be insufficient due to a decrease in the contact area between the head of the first countersunk screw and the seating surface of the tongue piece.

  Therefore, in the first invention of the present application, two opposing walls are provided on the mounting member to which the tongue piece is fixed. These two opposing walls are opposed to both end portions in the width direction of the tongue piece via a predetermined gap. As a result, even if the tip side portion of the tongue piece is pushed and expanded in the width direction as described above, it strikes the two opposing walls at the initial stage of pushing and spreading, and further pushing and spreading is suppressed. . As a result, it is possible to avoid the occurrence of the aforementioned fastening failure and maintain the connectivity between the tongue piece and the mounting member.

  And two opposing walls integrally provided in one mounting member respectively oppose the width direction both ends of a tongue piece. As a result, it is possible to reduce the dimensional error due to assembly compared to the case where the separate members are opposed to the one end and the other end in the width direction of the tongue piece, and the gap when facing each other can be made smaller. it can. As a result, it is possible to reliably avoid poor fastening and reliably maintain the connectivity between the tongue piece and the mounting member, that is, the two resin members.

Moreover, the 1st invention is provided with the protrusion part which protruded and provided so that the said opposing wall might adjoin to the width direction edge part of the said tongue piece at the time of fixation of the said tongue piece and the said attachment member, It is characterized by the above-mentioned. To do.

In the first invention of the present application, a protruding portion is locally provided on the opposing wall, and the protruding portion is abutted against both end portions in the width direction of the tongue piece when the tongue piece is expanded. By making the abutting portion local, the aforementioned gap can be further reduced under the same dimensional error condition. As a result, the connectivity between the tongue piece and the mounting member can be more reliably maintained.

In order to achieve the above-mentioned object, the second invention further comprises an installation member made of resin, on which the attachment member is installed by fastening using a second countersunk screw, and the first support of the attachment member The portion has a second through hole provided with a substantially tapered seating surface for embedding and arranging the head of the second countersunk screw, and the installation member includes the attachment member and the installation member. It comprises a second support part that is in contact with the first support part and is formed with a screw hole for receiving and fastening the second countersunk screw when fixed.

  Thus, in the structure in which the tongue piece and the mounting member are fixed by the first flat head screw, and the mounting member is installed on the installation member by the second flat head screw, the occurrence of poor fastening of the first flat head screw is avoided, and the tongue piece And the attachment property of the mounting member can be maintained.

In order to achieve the above object, the third invention uses a substantially rectangular tongue piece made of resin and an attachment member made of resin and to which the tongue piece is attached, using a first countersunk screw. A tongue-shaped piece of resin that is fixed by fastening using a second countersunk screw and is fixed to the mounting member that is fixed by fastening and is made of resin. Has a through hole with a substantially tapered seating surface for embedding and arranging the head of the first countersunk screw, and the installation member extends along the width direction of the tongue piece. And an insertion groove for inserting a tip end portion of the tongue piece when the attachment member and the installation member are fixed.

In the resin bonded body of the third invention of the present application, the first flat head screw is inserted through the tongue piece and the mounting member, and the mounting member is further mounted on the mounting member by the second flat head screw. The first countersunk screw is screwed through the through hole of the tongue piece, passes through the first through hole of the first support portion of the mounting member, and is screwed into the screw hole formed in the installation member to be fastened.

  Here, when the first countersunk screw is screwed in by the operator in order to fix the tongue piece and the mounting member, the head direction of the first countersunk screw causes a screwing direction (for example, clockwise) to the tongue piece by friction. ) And a compressive force in the thickness direction act. The tongue piece is provided with a seating surface with which the head of the first countersunk screw comes into contact, and this seating surface is substantially tapered in accordance with the shape of the first countersunk screw. Therefore, at the time of screwing, a compressive force mainly acts on the tongue piece among the rotational force and the compressive force. As a result, in the tongue piece made of resin, there is a risk that the portion on the tip side of the tongue piece is broken or broken from the through hole that is a weak point of strength, and the portion is greatly expanded in the width direction of the tongue piece. In that case, as the depth to be screwed becomes deeper, the spreading spread further progresses. At this time, there is a possibility that the coupling between the tongue piece and the mounting member may be insufficient due to a decrease in the contact area between the head of the first countersunk screw and the seating surface of the tongue piece.

Therefore, in the third invention of the present application, an insertion groove is provided in an installation member that is a fixing target of the attachment member. The insertion groove has a dimension along the width direction of the tongue piece substantially the same as that of the tongue piece, and the tip of the tongue piece is inserted. As a result, even if the tip side portion of the tongue piece is pushed and expanded in the width direction as described above, the spreading operation itself is prevented by the width direction end portion of the groove. As a result, it is possible to reliably avoid the occurrence of the above-described fastening failure and reliably maintain the connectivity between the tongue piece and the mounting member, that is, the two resin members.

According to a fourth invention, in the third invention, the depth of the insertion groove is set at a predetermined gap between the tip of the tongue piece and the bottom of the insertion groove when the attachment member and the installation member are fixed. It is characterized in that it is set to occur.

  By securing a gap between the tip of the tongue piece and the bottom of the insertion groove, it is possible to reliably prevent the tongue piece from entering the insertion groove due to the occurrence of a dimensional error.

To achieve the above object, a fifth invention comprises a platen roller that conveys a printing paper, a thermal line head that performs desired printing on the printing paper conveyed by the platen roller, and a resin. Comprising an under cover, a side cover installed on the left and right sides of the under cover, and a top cover attached to an upper portion of the side cover, and including the platen roller and the thermal line head A portable printer comprising: a housing constituting an outer shell; and a cover member pivotally supported by the housing and capable of exposing at least a part of a conveyance path of the printing paper by the platen roller in an open state. The top cover includes a substantially rectangular tongue piece, and the side cover includes A through-hole provided with a mounting member fixed to the tongue piece by fastening with a single countersunk screw, the tongue piece having a substantially tapered seating surface for embedding and arranging the head of the first countersunk screw The attachment member is in contact with the tongue piece when the tongue piece and the attachment member are fixed, and is formed with a first through hole for receiving the first countersunk screw. The support portion is provided integrally with the first support portion so as to face each other in the width direction of the tongue piece, and when the tongue piece and the attachment member are fixed, with respect to both end portions in the width direction of the tongue piece. And two opposing walls that face each other with a predetermined gap therebetween.

The portable printer according to the fifth aspect of the present invention includes a platen roller, a thermal line head, and a cover member. When the printing paper is taken into the conveyance path, the printing paper is conveyed by the platen roller, and desired printing is performed on the printing paper by the thermal line head. The platen roller and the thermal line head are included in a housing that forms the outer shell of the apparatus, and the housing includes an under cover, a side cover, and a top cover.

  At this time, in the housing, the first flat head screw is inserted through the tongue piece of the top cover and the attachment member of the side cover. The first countersunk screw is screwed from the through hole of the tongue piece, passes through the first through hole of the first support portion of the mounting member, and is screwed into a screw hole formed in an appropriate member provided in the under cover. It is concluded.

  Here, when the first countersunk screw is screwed in by the installation operator, the head of the first countersunk screw compresses the tongue piece in the rotational direction in the screwing direction by friction (for example, clockwise) and the thickness direction. Power acts. The tongue piece is provided with a seating surface with which the head of the first countersunk screw comes into contact, and this seating surface is substantially tapered in accordance with the shape of the first countersunk screw. Therefore, at the time of screwing, a compressive force mainly acts on the tongue piece among the rotational force and the compressive force. As a result, in the tongue piece made of resin, there is a risk that the portion on the tip side of the tongue piece is broken or broken from the through hole that is a weak point of strength, and the portion is greatly expanded in the width direction of the tongue piece. In that case, the push-out spread further progresses as the screwed depth increases. At this time, the coupling between the tongue piece and the mounting member becomes insufficient due to the reduction in the contact area between the head of the first countersunk screw and the seating surface of the tongue piece. As a result, the top cover and the side cover are not sufficiently fixed, and the rigidity of the housing may be reduced.

Therefore, in the fifth invention of the present application, two opposing walls are provided on the mounting member to which the tongue piece is fixed. These two opposing walls are opposed to both end portions in the width direction of the tongue piece via a predetermined gap. As a result, even if the tip side portion of the tongue piece is pushed and expanded in the width direction as described above, it strikes the two opposing walls at the initial stage of pushing and spreading, and further pushing and spreading is suppressed. . As a result, it is possible to avoid the occurrence of the aforementioned fastening failure and maintain the connectivity between the tongue piece and the mounting member. Thereby, a top cover and a side cover can fully be fixed.

  And two opposing walls integrally provided in one mounting member respectively oppose the width direction both ends of a tongue piece. As a result, it is possible to reduce the dimensional error due to assembly compared to the case where the separate members are opposed to the one end and the other end in the width direction of the tongue piece, and the gap when facing each other can be made smaller. it can. Therefore, it is possible to reliably avoid a fastening failure, and to reliably maintain the connectivity between the tongue piece and the mounting member. As a result, the connectivity of the top cover and the side cover, that is, the two resin members can be reliably maintained.

Further, according to a fifth aspect of the present invention , the facing wall provided in the mounting member of the side cover is close to the widthwise end of the tongue piece when the tongue piece of the top cover and the mounting member are fixed. It is characterized by including a projecting portion provided so as to project.

In the fifth invention of the present application, a protruding portion is locally provided on the opposing wall, and the protruding portion is abutted against both end portions in the width direction of the tongue piece when the tongue piece is expanded. By making the abutting portion local, the aforementioned gap can be further reduced under the same dimensional error condition. As a result, the connectivity between the tongue piece and the mounting member can be more reliably maintained.

In order to achieve the above object, according to a sixth aspect of the present invention , the under cover further includes an installation member on which the attachment member of the side cover is installed by fastening using a second countersunk screw. The first support portion has a second through hole having a substantially tapered seating surface for embedding and arranging the head of the second countersunk screw, and the installation member includes the mounting member and the mounting member. It comprises a second support part that is in contact with the first support part and fixed with a mounting member, and is formed with a screw hole for receiving and fastening the second countersunk screw.

  Thus, in the structure in which the tongue piece of the top cover and the attachment member of the side cover are fixed by the first countersunk screw, and the attachment member of the side cover is further installed on the installation member of the under cover by the second countersunk screw. Generation | occurrence | production of the fastening defect of a screw can be avoided and the coupling | bonding property of a top cover and a side cover can be maintained.

In order to achieve the above object, a seventh invention includes a platen roller that conveys a printing paper, a thermal line head that performs desired printing on the printing paper conveyed by the platen roller, and a resin. Comprising an under cover, a side cover installed on the left and right sides of the under cover, and a top cover attached to an upper portion of the side cover, and including the platen roller and the thermal line head A portable printer comprising: a housing constituting an outer shell; and a cover member pivotally supported by the housing and capable of exposing at least a part of a conveyance path of the printing paper by the platen roller in an open state. The top cover includes a substantially rectangular tongue piece, and the side cover includes A mounting member fixed to the tongue piece by fastening with a single countersunk screw, and the under cover having a mounting member on which the mounting member of the side cover is installed by fastening with a second countersunk screw The tongue piece has a through hole with a substantially tapered seating surface for embedding and arranging the head of the first countersunk screw, and the installation member extends along the width direction of the tongue piece. And having an insertion groove for inserting the tip of the tongue piece when the attachment member and the installation member are fixed. To do.

A portable printer according to a seventh aspect of the present invention includes a platen roller, a thermal line head, and a cover member. When the printing paper is taken into the conveyance path, the printing paper is conveyed by the platen roller, and desired printing is performed on the printing paper by the thermal line head. The platen roller and the thermal line head are included in a housing that forms the outer shell of the apparatus, and the housing includes an under cover, a side cover, and a top cover.

  At this time, in the housing, the first flat head screw is inserted into the tongue piece of the top cover and the mounting member of the side cover, and the mounting member of the side cover is further mounted on the mounting member of the under cover by the second flat head screw. The first countersunk screw is screwed through the through hole of the tongue piece, passes through the first through hole of the first support portion of the attachment member of the side cover, and is screwed into the screw hole formed in the installation member of the under cover. It is concluded.

  Here, when the first countersunk screw is screwed in by the installation operator, the head of the first countersunk screw compresses the tongue piece in the rotational direction in the screwing direction by friction (for example, clockwise) and the thickness direction. Power acts. The tongue piece is provided with a seating surface with which the head of the first countersunk screw comes into contact, and this seating surface is substantially tapered in accordance with the shape of the first countersunk screw. Therefore, at the time of screwing, a compressive force mainly acts on the tongue piece among the rotational force and the compressive force. As a result, in the tongue piece made of resin, there is a risk that the portion on the tip side of the tongue piece is broken or broken from the through hole that is a weak point of strength, and the portion is greatly expanded in the width direction of the tongue piece. In that case, the push-out spread further progresses as the screwed depth increases. At this time, the coupling between the tongue piece and the mounting member becomes insufficient due to the reduction in the contact area between the head of the first countersunk screw and the seating surface of the tongue piece. As a result, the top cover and the side cover are not sufficiently fixed, and the rigidity of the housing may be reduced.

Therefore, in the seventh invention of the present application, an insertion groove is provided in the installation member of the under cover, which is a fixing target of the attachment member of the side cover. The insertion groove has a dimension along the width direction of the tongue piece of the top cover that is substantially the same as that of the tongue piece, and the tip of the tongue piece is inserted. Thus, even if the tip side portion of the tongue piece of the top cover is pushed and expanded in the width direction as described above, the spreading operation itself is prevented by the width direction end portion of the groove. Thereby, generation | occurrence | production of the above-mentioned fastening failure can be avoided reliably and the coupling | bonding property of a tongue piece and an attachment member can be maintained reliably. As a result, the connectivity of the top cover and the side cover, that is, the two resin members can be reliably maintained.

According to an eighth invention, in the seventh invention, the depth of the insertion groove of the installation member is set between the tip of the tongue piece and the bottom of the insertion groove when the attachment member and the installation member are fixed. It is characterized in that it is set so that a predetermined gap is generated.

  By ensuring a gap between the tip of the top cover tongue and the bottom of the insertion groove on the under cover installation member, it is ensured that the tongue will not enter the insertion groove due to dimensional errors. Can be avoided.

  According to the present invention, it is possible to reliably avoid poor fastening due to a decrease in the contact area between the countersunk screw and the seating surface, and to reliably maintain the connectivity of the two resin members.

1 is a perspective view illustrating an overall appearance of a portable printer according to an embodiment of the present invention. It is a cross-sectional view by the II-II cross section in FIG. It is an exploded view of a housing. It is an enlarged view of the tongue piece of the state before a coupling | bonding, an attachment member, and an installation member for demonstrating the coupling structure of a comparative example. It is the arrow line view seen from the arrow V direction in FIG. It is an enlarged view of the tongue piece in the state before a coupling | bonding, the attachment member, and the installation member for demonstrating the coupling | bonding structure of one Embodiment of this invention. It is the arrow VII view seen from the arrow VII direction in FIG. 6, and the horizontal sectional view by the VIIb-VIIb cross section in FIG. 7 (a). It is an enlarged view of the tongue piece in the state before a coupling | bonding, an attachment member, and an installation member for demonstrating the coupling structure of the modification which inserts a tongue piece in the groove | channel of an undercover. It is the arrow line view seen from the arrow IX direction in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. This embodiment is an example when the resin combination of the present invention is applied to, for example, a housing of a portable printer.

  In FIG. 1, a portable printer 1 includes a housing 2 that is formed in a substantially rectangular parallelepiped shape as a whole. A cover member 3 is provided on the upper surface of the housing 2 on the back side in the figure so as to be openable and closable. At the time of printing, a printing paper (not shown) is inserted into a gap (not shown) between the cover members 3. In FIG. 1, the side surface located on the front side of the housing 2 corresponds to the back surface portion of the portable printer 1, and the battery chamber cover 4 is detachably provided on the back surface portion. In a state in which the battery chamber cover 4 is removed, a battery storage chamber 5 (see also FIG. 2 described later) which is a space capable of closely accommodating a substantially rod-shaped battery 7 (not shown in FIG. 1; see FIG. 2 described later). Is provided in the back surface of the housing 2 so as to open. In the following description, the side on which the cover member 3 is provided (the back side in FIG. 1) is referred to as the “front side” of the portable printer 1 and the back side (in FIG. 1). The front side is referred to as “rear side”.

  FIG. 2 shows a state where the battery chamber cover 4 is attached to the housing 2 with the cover member 3 closed.

  In FIG. 2, a platen roller 11 and a thermal line head 12 are provided in the housing 2. The platen roller 11 is rotatably supported inside the housing 2 and conveys printing paper by being driven to rotate by a driving mechanism (not shown). The thermal line head 12 is installed so as to be able to come into contact with and separate from the platen roller 11, and contacts the platen roller 11 with a predetermined pressure during printing, and performs desired printing on the printing paper inserted therebetween.

  In a normal case, the printing paper is conveyed by the platen roller 11 by inserting the printing paper through the gap conveyance path with the cover member 3 closed. Then, desired printing is performed on the printing paper by the thermal line head 12. In order to remove a paper jam, the cover member 3 is opened. At this time, since the platen roller 11 is released from the thermal line head 12, it becomes possible to easily pull out the paper.

  In the battery storage chamber 5, three members including a tongue piece 22, a mounting member 42, and an installation member 32 (see also FIGS. 3 and 6 described later) are countersunk on the side surface facing the battery chamber cover 4. Fastening portions that are fastened and joined together at 61, 62, and 63 are provided.

  The housing 2 includes a top cover 21, an under cover 31, and two side covers 41 and 51 (see FIG. 3 described later). These are all made of a resin material.

  As shown in FIGS. 3 and 2, the top cover 21 constitutes a portion of the upper surface portion of the housing 2 excluding the cover member 3. On the lower surface of the top cover 21, two tongue pieces 22 formed in a rectangular thin plate shape that is long in the vertical direction are provided so as to hang downward at positions aligned along the longitudinal direction of the top cover 21. .

  The under cover 31 constitutes the lower half of the lower surface portion of the housing 2 and the lower front surface portion in FIG. A battery chamber front wall 6 that faces the battery chamber cover 4 in FIG. 2 is formed on the upper surface of the under cover 31 so as to face upward. At both ends of the battery chamber front wall 6, there are provided installation members 32 each formed in a substantially rectangular flat plate shape that is long in the vertical direction.

  The two side covers 41 and 51 respectively constitute an end surface portion of the housing 2 in the longitudinal direction and a portion excluding the battery chamber cover 4 in the rear portion on the near side in FIG. In the vicinity of the portion constituting the back portion of each side cover 41, 51, mounting members 42, 52 that are formed in a substantially rectangular shape as a whole are provided.

  The top cover 21, the two side covers 41 and 51, and the under cover 31 constitute the housing 2 integrally by fitting a plurality of engaging structures (not shown). Further, the top cover 21, the two side covers 41, 51, and the under cover 31 are countersunk screws 61, 62, 63 at locations where the corresponding combinations of the tongue piece 22, the mounting members 42, 52, and the installation member 32 overlap. Is fixed by fastening (see FIG. 2 above). Thereby, in the state fastened with the countersunk screws 61, 62, 63, the integral coupling of the whole housing 2 is maintained, and the housing 2 can be easily disassembled by removing the tightening of the countersunk screws 61, 62, 63, and the internal Maintenance inspection can be performed.

  Here, the coupling structure of the tongue piece 22, the mounting members 42 and 52, and the installation member 32, which is a feature of the present embodiment, will be described in detail.

  First, before describing the coupling structure in the case of the present embodiment, a coupling structure of a comparative example for explaining the operation and effect of the present embodiment will be described with reference to FIGS. 4 and 5. For convenience of comparison, the same reference numerals as those in the present embodiment are used as the reference numerals of the respective parts in the comparative example. In addition, the example shown in each figure has shown the combination of three members located in the left side in FIG. 3, and illustrations other than the tongue piece 22, the attachment member 42, and the installation member 32 are abbreviate | omitted or simplified suitably. Show.

  4 and 5, the tongue piece 22 of the top cover 21 in the comparative example is formed with through holes 23 and 24 through which screws can be penetrated at two locations spaced apart by a predetermined distance in the vertical direction.

  The attachment member 42 of the side cover 41 is formed in a substantially rectangular flat plate shape that is long in the vertical direction, and the entire size is substantially the same as that of the tongue piece 22. The attachment member 42 also has two holes 43 and 44 at positions corresponding to the two through holes 23 and 24 of the tongue piece 22. More specifically, a screw hole 43 into which a screw can be screwed is formed on the upper side, and a through hole 44 is formed on the lower side. Further, another through hole 45 is formed between them. That is, the mounting member 42 is formed with three holes 43, 44, 45 arranged in the vertical direction, of which the two on the lower side are the through holes 44, 45 and the one on the upper side is the screw hole 43. It is. A left pressing wall 46 ′ is provided on one edge (the left edge in the illustrated example) in the width direction of the mounting member 42.

  Two screw holes 34 and 35 are formed in the installation member 32 of the under cover 31 at positions corresponding to the two lower through holes 44 and 45 formed in the mounting member 42. The installation member 32 is provided with a right pressing wall 36 at one edge in the width direction (right edge in the illustrated example).

  Here, when the tongue piece 22, the attachment member 42, and the installation member 32 are coupled, the installation member 32 is positioned on the foremost side of the housing 2, and the attachment member 42 overlaps on the rear side thereof, and further on the rear side thereof. The tongue piece 22 overlaps (see FIG. 2 described above).

  As a specific fastening sequence, first, in a state where the mounting member 42 is overlapped on the rear side of the installation member 32, a through hole 45 (second through hole) located in the center of the mounting member 42, and the installation member The under cover 31 and the side cover 41 are coupled together by fastening the first countersunk screw 61 (second countersunk screw) to the screw hole 35 positioned above 32. Next, by superimposing the tongue piece 22 on the rear side of the attachment member 42, the uppermost through hole 23 and the screw hole 43 of the tongue piece 22 and the attachment member 42 overlap each other, and the second dish The side cover 41 and the top cover 21 are joined by fastening the screw 62. Finally, in a state where the tongue piece 22, the mounting member 42, and the installation member 32 are laminated, the through hole 24, the through hole 44 (first through hole), and the screw hole 34 that are located at the lowest positions overlap each other. By fastening the third countersunk screw 63 (first countersunk screw) here, the three members of the tongue piece 22, the attachment member 42, and the installation member 32 are integrally coupled.

  As shown in FIG. 2, the three countersunk screws 61, 62, 63 are all holes from the rear side (right side in FIG. 2) to the front side (left side in FIG. 2) of the housing 2. Is inserted. The head of the first countersunk screw 61 is sandwiched between the mounting member 42 and the tongue piece 22. The heads of the second countersunk screw 62 and the third countersunk screw 63 are disposed on the tongue piece 22.

  Here, in order to reduce the size of the entire portable printer 1, it is necessary to strictly reduce the capacity of the inside of the housing 2, and the battery storage chamber 5 also has a battery 7 (shown by a broken line in FIG. 2) closely. Need to be stored. For this reason, the tongue piece 22, the mounting member 42, and the installation member 32 are each thinned and closely stacked and joined, and the three countersunk screws 61, 62, and 63 also have their heads as members. It is necessary to use a countersunk screw that can be embedded inside. Therefore, the countersunk screws 61, 62, 63 are respectively inserted into the portions where the heads of the countersunk screws 61, 62, 63 are embedded, that is, the two through holes 23, 24 of the tongue piece 22 and the through hole 45 of the mounting member 42. Taper-shaped seating surfaces 23a, 24a, and 45a are provided. In the illustrated example, the entire three through holes 23, 24, 45 are formed as seating surfaces 23a, 24a, 45a.

  However, the following problems occur in the coupling structure of the comparative example shown in FIGS. 4 and 5.

  That is, when the third countersunk screw 63 is screwed into the lowermost through holes 24 and 44 and the screw hole 34 by an installation operator, the head of the countersunk screw 63 causes a screw by friction to the tongue piece 22. A rotational force in the rotating direction (for example, clockwise) and a compressive force in the thickness direction act. And since the taper-shaped seating surface 24a which spreads toward the tongue piece 22 side is formed in the through-hole 24, at the time of screwing, the tongue piece 22 is mainly made of the rotational force and the compression force. A compression force acts. As a result, as shown in FIG. 5, a portion 22 a on the distal end side of the tongue piece 22 from the through hole 24, which is a strong weak point, of the resin tongue piece 22 (hereinafter, referred to as “tip portion 22 a” as appropriate). ) May be damaged or broken, and the tip end portion 22a may be greatly expanded in the width direction of the tongue piece 22 (the countersunk screw 63 is not shown in FIG. 5). In that case, as the depth to be screwed becomes deeper, the push-out spread further progresses, and there is a possibility that the coupling between the tongue piece 22 and the attachment member 42 becomes insufficient due to poor fastening. Specifically, the contact area between the head of the countersunk screw 63 and the seating surface 24a of the tongue piece 22 is reduced by the spreading of the tongue piece 22 in the width direction, and therefore the countersunk screw 63 is easily loosened. Occurrence of rattling or the worst case may occur until the countersunk screws 63 fall off.

  Here, as described above, the housing 2 has dimensions due to changes over time from the relationship in which the top cover 21, the side covers 41 and 51, and the under cover 31 that are separately formed as resin members are assembled and coupled. The fitting tolerance between the tongue piece 22, the mounting members 42 and 52, and the installation member 32 is set to be relatively loose so that errors and assembly errors can be allowed to some extent. For this reason, in the coupling structure of this comparative example shown in FIG. 5, the left pressing wall 46 ′ of the side cover 41 and the right pressing wall 36 of the under cover 31 are positioned with the tongue piece 22 sandwiched in the width direction. However, since the right pressing wall 36 and the left pressing wall 46 ′ are part of separate members, there is a large dimensional error in the mutual arrangement relationship. Are likely to cause excessive separation distances D1 and D1 ', respectively.

  That is, when the countersunk screw 63 is fastened, the large expansion in the width direction of the distal end portion 22a of the tongue piece 22 is caused by the thinning due to the formation of the seating surface 24a in the tongue piece 22 itself, or the distal end portion 22a. In addition to the lack of strength, the separation distances D1 and D1 ′ generated at both ends of the tongue piece 22 allow deformation in the plane width direction.

  Next, the coupling structure in the present embodiment will be described with reference to FIGS. 6, 7A and 7B corresponding to FIGS. 4 and 5, respectively.

  Basically, the coupling structure of the present embodiment is almost the same as the configuration of the comparative example, but the configuration of the mounting member 42 of the side cover 41 is mainly different. First, the mounting member 42 included in the side cover 41 in the present embodiment includes a receiving portion 48 (first support portion) and two opposing walls 46 and 47. The receiving portion 48 is formed in a substantially rectangular flat plate shape that is long in the vertical direction. As shown in FIG. 7B, the receiving portion 48 is dimensioned in the width direction (in other words, a separation distance between the two opposing walls 46 and 47). ) W1 is slightly wider than the tongue piece 22 and is substantially the same height as the tongue piece 22 in the vertical direction. The two opposing walls 46 and 47 are provided integrally with the receiving portion 48 at the edge in the width direction of the receiving portion 48 so as to face each other in the width direction of the tongue piece 22. The two opposing walls 46 and 47 are opposed to both ends in the width direction of the tongue piece 22 via a predetermined gap D2 (see FIG. 7B) when the tongue piece 22 and the attachment member 42 are fixed.

  6 and FIGS. 7A and 7B, the left facing wall 46 located on the left side is formed with a length over the entire longitudinal direction of the receiving portion 48, and in FIGS. 6 and 7A and 7B. The right facing wall 47 located on the right side is formed with a length extending from the through hole 45 located in the center of the receiving portion 48 to the lower part. In the state where the mounting member 42 is superposed on the installation member 32, as shown in FIG. 7A, the right facing wall 47 is flush with the right pressing wall 36 of the under cover 31 and the battery chamber front wall 6. It almost agrees.

  Further, ribs 49 and 49 (projections) are formed on the surfaces of the two opposing walls 46 and 47 facing each other. The ribs 49 are provided so as to protrude close to the end in the width direction of the tongue piece 22 as shown in FIG. 7B when the tongue piece 22 and the attachment member 42 are fixed. In this example, each rib 49 has a length extending from the lower through hole 44 to the lower portion of the receiving portion 48, and is particularly provided locally only at a position where the tongue piece 22 is easily deformed in the width direction. ing. In addition, the upper corner of the rib 49 is chamfered, which facilitates the insertion of the tongue piece 22 into the rib 49.

  Further, in the under cover 31, a right pressing wall 36 interposed between the installation member 32 and the battery chamber front wall 6 so that the right facing wall 47 of the mounting member 42 can be received is compared with the comparative example. And moved to the right. In the present embodiment, the installation member 32 itself corresponds to the second support portion described in each claim. In addition, the whole coupling body of the tongue piece 22, the attachment member 42, and the installation member 32 comprises the resin coupling body as described in each claim.

  About another structure, it is the same as that of the said comparative example. That is, as described above, the attachment member 42 and the installation member 32 are fixed by fastening using the first flat head screw 61 at the through hole 45 and the screw hole 35 located in the center. The tongue piece 22 and the attachment member 42 are fixed by fastening with the second countersunk screw 62 at the uppermost through hole 23 and screw hole 43. The tongue piece 22, the mounting member 42, and the installation member 32 are fixed together by fastening with the third countersunk screw 63 at the lowermost through holes 24 and 44 and the screw hole 34.

  The tongue piece 22 has through holes 23 and 24 having tapered seating surfaces 23a and 24a for embedding and arranging the heads of the second countersunk screw 62 and the third countersunk screw 63, respectively. doing. In this example, the entire through holes 23 and 24 are formed by the seating surfaces 23a and 24a. The receiving portion 48 of the attachment member 42 contacts the front surface of the tongue piece 22 when the tongue piece 22 and the attachment member 42 are fixed. The receiving portion 48 is formed with a screw hole 43 for receiving and fastening the second countersunk screw 62.

  The attachment member 42 has a through hole 45 having a tapered seating surface 45a for embedding and arranging the head of the first countersunk screw 61. When the mounting member 42 and the mounting member 32 are fixed to each other, the mounting member 32 contacts a surface opposite to the seating surface 45 a of the receiving portion 48 of the mounting member 42, in other words, a front surface of the receiving portion 48. The installation member 32 is formed with screw holes 34 and 35 for receiving and fastening the first countersunk screw 61 and the third countersunk screw 63.

  As described above, in the present embodiment, the two facing walls 46 and 47 are provided on the mounting member 42 to which the tongue piece 22 is fixed. These two opposing walls 46 and 47 are opposed to both end portions in the width direction of the tongue piece 22 via a predetermined gap D2. Thereby, even if the tip side portion 22a of the tongue piece 22 is pushed and expanded in the width direction as in the above comparative example, it strikes the two opposing walls 46 and 47 in the initial stage of pushing and spreads. Is prevented from spreading. As a result, it is possible to avoid the occurrence of the aforementioned fastening failure and maintain the connectivity between the tongue piece 22 and the mounting member 42.

  In particular, unlike the comparative example, the two opposing walls 46 and 47 are integrally provided on one mounting member 42. For this reason, the separation distance W1 between the two opposing walls 46 and 47 is always maintained (see FIG. 7B). Thereby, the dimensional error due to the assembly when the tongue piece 22 is arranged therebetween is reduced as compared with the comparative example in which different members are opposed to the one end and the other end in the width direction of the tongue piece 22, respectively. And the gap D2 when facing each other can be further reduced. As a result, the attachment member 42 can reliably and tightly restrain the tongue piece 22 in the width direction, and the tongue piece 22 is greatly expanded in the width direction when the countersunk screw is fastened as shown in FIG. 5 of the comparative example. Can be prevented. Therefore, it is possible to reliably avoid the fastening failure as described above, and to reliably maintain the coupling between the tongue piece 22 and the mounting member 42.

  In this embodiment, in particular, ribs 49 and 49 are locally provided on the opposing walls 46 and 47, and the ribs 49 and 49 are provided at both end portions in the width direction of the tongue piece 22 when the tongue piece 22 is expanded. Strike. By making the abutting portion local, it is possible to make it close by a smaller gap D3 (see FIG. 7B) under the same dimensional error condition. As a result, the connectivity between the tongue piece 22 and the mounting member 42 can be more reliably maintained.

  The present invention is not limited to the above, and various modifications can be made without departing from the spirit and technical idea of the present invention. For example, you may make it form the groove | channel which inserts a tongue piece in an undercover.

  That is, in the said embodiment, although the both ends of the width direction of the tongue piece 22 were restrained with the two opposing walls 46 and 47 provided in the attachment member 42, this invention is not limited to this. For example, the tongue piece 22 may be formed long in the vertical direction, and the distal end portion thereof may be inserted into a groove formed on the bottom surface of the under cover 31 to restrain the width direction.

  The coupling structure of this modification will be described with reference to FIGS. 8 and 9 correspond to FIGS. 4 and 5, respectively. Parts equivalent to those in FIGS. 1 to 7 are given the same reference numerals, and description thereof will be omitted as appropriate.

  Basically, the coupling structure of the present modification is almost the same as the configuration of the comparative example shown in FIGS. 4 and 5, but mainly the installation member 32A of the under cover 31 and the tongue piece 22A of the top cover 21. There is a difference in configuration.

  The installation member 32 </ b> A includes an installation member main body 37 and an insertion groove 38. The installation member main body 37 has a configuration equivalent to that of the installation member 32 in the above-described embodiment, and is a substantially rectangular portion standing from the bottom surface of the under cover 31.

  The insertion groove 38 is a groove formed on the bottom surface of the under cover 31 in the vicinity of the rear side of the installation member main body 37, and the tip of the tongue piece 22A can be inserted at a position on the extension of the tip of the tongue piece 22A in the combined arrangement. Formed. That is, only the tip of the tongue piece 22 </ b> A that is particularly easily deformed in the width direction is locally inserted into the insertion groove 38. Further, the insertion groove 38 has a width dimension W2 that is substantially the same as the width direction dimension along the width direction of the tongue piece 22A, and is provided with the tongue piece 22A, the attachment member 42, and the installation member 32A as shown in FIG. At the time of fixing, the tongue pieces 22A are close to each other in the width direction via a predetermined gap D4. A chamfer is formed at the corner in the width direction at the opening of the insertion groove 38. By this chamfering, the insertion of the tongue piece 22A into the insertion groove 38 is easy. The tongue piece 22 </ b> A has a length L at the tip that is longer than the tongue piece 22 so that the tongue piece 22 </ b> A can be inserted into the insertion groove 38. The depth E of the insertion groove 38 is a predetermined distance between the tip of the tongue 22A and the bottom of the insertion groove 38 when the tongue 22A, the attachment member 42, and the installation member 32A are fixed as shown in FIG. The gap D5 is set to be generated.

  About another structure, it is the same as the comparative example shown in the said FIG. 4, FIG. The entire joined body of the tongue piece 22A, the mounting member 42, and the installation member 32A constitutes the resin joined body described in each claim.

  In the present modified example configured as described above, the width of the insertion groove 38 is the same as in the above embodiment, even if the tip side portion of the tongue piece 22A is expanded in the width direction as in the comparative example. The spreading operation itself is prevented by the direction end. Specifically, as described above, the insertion groove 38 formed in the under cover 31 is set to a width direction dimension W2 substantially the same as that of the tongue piece 22A, and is slightly smaller than both ends in the width direction of the tongue piece 22A. It is close by a gap D4. As a result, the insertion groove 38 can securely and tightly restrain the tongue piece 22A in the width direction, so that the tongue piece 22 has a large width direction at the time of fastening the countersunk screw as shown in FIG. Occurrence of the spread can be prevented. As a result, it is possible to reliably avoid the occurrence of the above-described fastening failure and reliably maintain the connectivity between the tongue piece 22A and the mounting member 42.

  In this modification, in particular, by securing a gap D5 between the tip of the tongue piece 22A and the bottom of the insertion groove 38, the tongue piece 22A does not enter the insertion groove 38 due to the occurrence of a dimensional error. Can be reliably avoided.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1 Portable printer 2 Housing 3 Cover member 11 Platen roller 12 Thermal line head 21 Top cover 22, 22A Tongue piece 23, 24 Through-hole 23a, 24a Seat surface 31 Under cover 32 Installation member (2nd support part)
32A Installation member 34, 35, 43 Screw hole 38 Insertion groove 41, 51 Side cover 42, 52 Mounting member 44 Through hole (first through hole)
45 Through hole (second through hole)
45a Seat 46 Left side facing wall (facing wall)
47 Right facing wall (facing wall)
48 Receiving part (first support part)
49 Ribs (projections)
61 First countersunk screw (second countersunk screw)
62 Second countersunk screw 63 Third countersunk screw (first countersunk screw)

Claims (8)

A substantially rectangular tongue piece (22) made of resin and a mounting member (42) made of resin and to which the tongue piece (22) is attached are fastened using a first countersunk screw (63). A resin bond that can be fixed by
The tongue piece (22)
A through hole (24) having a substantially tapered seating surface (24a) for embedding the head of the first countersunk screw (63);
The mounting member (42)
A first through hole (44) for contacting the tongue piece (22) and receiving the first countersunk screw (63) is formed when the tongue piece (22) and the attachment member (42) are fixed. A first support portion (48),
The tongue piece (22) is provided integrally with the first support portion (48) so as to face each other in the width direction of the tongue piece (22), and the tongue piece (22) and the attachment member (42) are fixed when the tongue piece (22) is fixed. Two opposing walls (46, 47) opposed to the both ends in the width direction of the piece (22) via a predetermined gap (D2),
Equipped with a,
The opposing walls (46, 47)
A projecting portion (49) provided so as to project close to an end in the width direction of the tongue piece (22) when the tongue piece (22) and the attachment member (42) are fixed. A resin bonded body characterized by that. A substantially rectangular tongue piece (22) made of resin and a mounting member (42) made of resin and to which the tongue piece (22) is attached are fastened using a first countersunk screw (63). A resin bond that can be fixed by
The tongue piece (22)
A through hole (24) having a substantially tapered seating surface (24a) for embedding the head of the first countersunk screw (63);
The mounting member (42)
A first through hole (44) for contacting the tongue piece (22) and receiving the first countersunk screw (63) is formed when the tongue piece (22) and the attachment member (42) are fixed. A first support portion (48),
The tongue piece (22) is provided integrally with the first support portion (48) so as to face each other in the width direction of the tongue piece (22), and the tongue piece (22) and the attachment member (42) are fixed when the tongue piece (22) is fixed. Two opposing walls (46, 47) opposed to the both ends in the width direction of the piece (22) via a predetermined gap (D2),
With
Further comprising an installation member (32) made of resin, to which the attachment member (42) is installed by fastening with a second countersunk screw (61),
The first support portion (48) of the attachment member (42)
A second through hole (45) having a substantially tapered seating surface (45a) for embedding and arranging the head of the second countersunk screw (61);
The installation member is
When the attachment member (42) and the installation member (32) are fixed, the screw hole (35 for contacting the first support portion (48) and receiving and fastening the second countersunk screw (61)). And a second support part (32) formed with a resin combination. Fastening a substantially rectangular tongue piece (22A) made of resin and an attachment member (42) made of resin and to which the tongue piece (22A) is attached using a first countersunk screw (63) Can be fixed by
It is a resin combined body made of resin and fixed by fastening using a second countersunk screw (61) to the mounting member (32A), which is the mounting target of the mounting member (42), and the mounting member (42). And
The tongue piece (22A)
A through hole (24) having a substantially tapered seating surface (24a) for embedding the head of the first countersunk screw (63);
The installation member (32A)
Along with the width direction of the tongue piece (22A), it has a dimension (W2) substantially the same as the width direction dimension of the tongue piece (22A), and the attachment member (42) and the installation member (32A) are fixed. Sometimes, a resin bonded body is provided with an insertion groove (38) for inserting the tip of the tongue piece (22A). The resin conjugate according to claim 3 , wherein
Depth (E) of the insertion groove (38),
When the attachment member (42) and the installation member (32A) are fixed, a predetermined gap (D5) is generated between the tip of the tongue piece (22A) and the bottom of the insertion groove (38). A resin combination characterized by being set. A platen roller (11) for conveying the printing paper;
A thermal line head (12) for performing desired printing on the printing paper conveyed by the platen roller (11);
An under cover (31) made of resin, a side cover (41, 51) installed on the left and right sides of the under cover (31), and an upper part of the side cover (41, 51). A housing (2) comprising a top cover (21) and constituting an outer shell of a device containing the platen roller (11) and the thermal line head (12);
A cover member (3) rotatably supported by the housing (2) and capable of exposing at least a part of a conveyance path of the printing paper by the platen roller (11) in an open state;
A portable printer (1) having
The top cover (21) includes a substantially rectangular tongue (22),
The side cover (41) includes an attachment member (42) fixed to the tongue piece (22) by fastening with a first countersunk screw (63),
The tongue piece (22)
A through hole (24) having a substantially tapered seating surface (24a) for embedding the head of the first countersunk screw (63);
The mounting member (42)
A first through hole (44) for contacting the tongue piece (22) and receiving the first countersunk screw (63) is formed when the tongue piece (22) and the attachment member (42) are fixed. A first support portion (48),
The tongue piece (22) is provided integrally with the first support portion (48) so as to face each other in the width direction of the tongue piece (22), and the tongue piece (22) and the attachment member (42) are fixed when the tongue piece (22) is fixed. Two opposing walls (46, 47) opposed to the both ends in the width direction of the piece (22) via a predetermined gap (D2),
With
The opposing walls (46, 47) provided on the mounting member (42) of the side cover (41) are:
When the tongue piece (22) of the top cover (21) and the mounting member (42) are fixed, a protruding portion (49) protruding so as to be close to the widthwise end of the tongue piece (22). ) portable printer according to claim <br/> comprise a (1). A platen roller (11) for conveying the printing paper;
A thermal line head (12) for performing desired printing on the printing paper conveyed by the platen roller (11);
An under cover (31) made of resin, a side cover (41, 51) installed on the left and right sides of the under cover (31), and an upper part of the side cover (41, 51). A housing (2) comprising a top cover (21) and constituting an outer shell of a device containing the platen roller (11) and the thermal line head (12);
A cover member (3) rotatably supported by the housing (2) and capable of exposing at least a part of a conveyance path of the printing paper by the platen roller (11) in an open state;
A portable printer (1) having
The top cover (21) includes a substantially rectangular tongue (22),
The side cover (41) includes an attachment member (42) fixed to the tongue piece (22) by fastening with a first countersunk screw (63),
The tongue piece (22)
A through hole (24) having a substantially tapered seating surface (24a) for embedding the head of the first countersunk screw (63);
The mounting member (42)
A first through hole (44) for contacting the tongue piece (22) and receiving the first countersunk screw (63) is formed when the tongue piece (22) and the attachment member (42) are fixed. A first support portion (48),
The tongue piece (22) is provided integrally with the first support portion (48) so as to face each other in the width direction of the tongue piece (22), and the tongue piece (22) and the attachment member (42) are fixed when the tongue piece (22) is fixed. Two opposing walls (46, 47) opposed to the both ends in the width direction of the piece (22) via a predetermined gap (D2),
With
The under cover (31)
An installation member (32) on which the attachment member (42) of the side cover (41) is installed by fastening using a second countersunk screw (61);
The first support portion (48) of the attachment member (42)
A second through hole (45) having a substantially tapered seating surface (45a) for embedding and arranging the head of the second countersunk screw (61);
The installation member is
When the attachment member (42) and the installation member (32) are fixed, the screw hole (35 for contacting the first support portion (48) and receiving and fastening the second countersunk screw (61)). A portable printer (1), comprising: a second support portion (32) formed with a A platen roller (11) for conveying the printing paper;
A thermal line head (12) for performing desired printing on the printing paper conveyed by the platen roller (11);
An under cover (31) made of resin, a side cover (41, 51) installed on the left and right sides of the under cover (31), and an upper part of the side cover (41, 51). A housing (2) comprising a top cover (21) and constituting an outer shell of a device containing the platen roller (11) and the thermal line head (12);
A cover member (3) rotatably supported by the housing (2) and capable of exposing at least a part of a conveyance path of the printing paper by the platen roller (11) in an open state;
A portable printer (1) having
The top cover (21) includes a substantially rectangular tongue piece (22A),
The side cover (41) includes an attachment member (42) fixed to the tongue piece (22A) by fastening with a first countersunk screw (63),
The under cover (31) includes an installation member (32A) on which the attachment member (42) of the side cover (41) is installed by fastening with a second countersunk screw (61).
The tongue piece (22A)
A through hole (24) having a substantially tapered seating surface (24a) for embedding the head of the first countersunk screw (63);
The installation member (32A)
Along with the width direction of the tongue piece (22A), it has a dimension (W2) substantially the same as the width direction dimension of the tongue piece (22A), and the attachment member (42) and the installation member (32A) are fixed. A portable printer (1) characterized in that it is sometimes provided with an insertion groove (38) for inserting the tip of the tongue piece (22A). The portable printer according to claim 7 , wherein
Depth (E) of the insertion groove (38) of the installation member (32A),
When the attachment member (42) and the installation member (32A) are fixed, a predetermined gap (D5) is generated between the tip of the tongue piece (22A) and the bottom of the insertion groove (38). A portable printer (1) characterized by being set.

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