JP2007307796A - Cartridge case, and tape cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bond a first case and a second case without strictly setting the sizes of a press-fitting pin and a press-fitting hole, and by properly press-fitting the press-fitting pin in the press-fitting hole. <P>SOLUTION: This cartridge case 2 consists of a first case 10 and a second case 20 which are bonded to each other, and houses a housing article inside. The cartridge case 2 is equipped with the press-fitting pin 15 which is formed on the bonding end surface of the first case 10, and the press-fitting hole 25 which is formed on the bonding end surface of the second case 20 in a manner to correspond to the press-fitting pin 15, and in which the press-fitting pin 15 is press-fitted. The press-fitting pin 15 has a plurality of external surface press-bonding sections 15a which are press-bonded to the press-fitting hole 25 at a plurality of locations, and a plurality of external surface non-press-bonding sections 15b in the peripheral direction. The press-fitting hole 25 has a plurality of internal surface press-bonding sections 25a which correspond to respective external surface press-bonding sections 15a, and a plurality of internal surface non-press-bonding sections 25b which correspond to respective external surface non-press-bonding sections 15b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cartridge case and a tape cartridge having a two-divided structure in which an item is accommodated.

Conventionally, the first case (upper case) and the second case (lower case) joined to each other, a cylindrical press-fit pin formed on the joint end surface of the first case, and a second case corresponding to the press-fit pin. A cartridge case is known that includes a press-fitting hole having a circular cross-section formed on a joining end surface and into which a press-fitting pin is press-fitted (see Patent Document 1). The first case and the second case are usually molded by injection molding or the like using different molds. Further, the press-fit pin and the press-fit hole are designed with a fastening allowance that provides an appropriate joining force (pullout strength).
JP 2002-53249 A

  In such a conventional cartridge case, since the cross-sectional shape of the press-fit pin and the cross-sectional shape of the press-fit hole are both circular, it is necessary to set the size of both of them precisely, and at the time of molding, there is a slight dimension in either one of them. Even if the change occurred, the press-fit pin could not be properly press-fitted into the press-fit hole. For example, if the press-fit pin is molded larger than the design value, the tightening margin between the press-fit pin and the press-fit hole is larger than the design value, so there is a risk that the peripheral edge of the press-fit hole will crack or whiten. there were. On the other hand, when the press-fit pin is formed smaller than the design value, the fastening allowance between the press-fit pin and the press-fit hole is smaller than the design value, so that the joining force of the press-fit pin may be insufficient. In order to solve this problem, even if a dimensional change occurs in the press-fit pin and the press-fit hole, the first case in which the press-fit pin is formed and the second case in which the press-fit hole is formed so that both change at the same rate. It is conceivable to mold the case under the same conditions. However, in practice, the first case and the second case are molded with different molds, and it is difficult to make the molding conditions exactly the same.

  The present invention provides a cartridge case and a tape cartridge capable of joining the first case and the second case by appropriately press-fitting the press-fit pin into the press-fit hole without strictly setting the size of the press-fit pin and the press-fit hole. The issue is to provide.

  The cartridge case of the present invention is composed of a first case and a second case that are joined to each other, and is a cartridge case that accommodates an article therein. The cartridge case includes a press-fit pin formed on a joint end surface of the first case, and a press-fit pin. Correspondingly, a press-fit hole is formed on the joint end surface of the second case, and the press-fit pin is press-fitted, and the press-fit pin has a plurality of outer surface press-contact portions and a plurality of outer surfaces press-contacted to the press-fit holes at a plurality of locations in the circumferential direction. The press-fitting hole has a plurality of inner surface press contact portions corresponding to each outer surface press contact portion and a plurality of inner surface non press contact portions corresponding to each outer surface non press contact portion.

  According to this configuration, the press-fit pin and the press-fit hole include a plurality of press-contact portions that are press-contacted to each other by the respective outer-surface press-contact portions and the respective inner-surface press-contact portions in the circumferential direction, and a plurality of the press-fit pins and press-fit holes. The non-pressure-welded part of each other is brought into a state of being pressed against each other. For this reason, at the time of pressure contact, at each pressure contact portion, at least one of each outer surface pressure contact portion and each inner surface pressure contact portion is deformed (collapsed), but the deformation can be released to the non-pressure contact portion adjacent in the circumferential direction. Thereby, the shift | offset | difference from the design size of a press-fit pin and a press-fit hole can be absorbed. That is, when the press-fit pin becomes larger than the design value, or when the press-fit hole becomes smaller than the design value, the deformation amount of at least one of each outer surface press contact portion and each inner surface press contact portion increases, and an appropriate Press-in state. On the other hand, when the press-fit pin is smaller than the design value or the press-fit hole is larger than the design value, the deformation amount of at least one of each outer surface press contact portion and each inner surface press contact portion is reduced, and Will be in a press-fit state. Accordingly, the first case and the second case can be joined by appropriately press-fitting the press-fit pin into the press-fit hole without strictly setting the sizes of the press-fit pin and the press-fit hole. Therefore, the production efficiency of the cartridge case can be improved, and the production cost can be reduced.

  In this case, in a plurality of pressure contact portions where each outer surface pressure contact portion and each inner surface pressure contact portion are in pressure contact, one of each outer surface pressure contact portion and each inner surface pressure contact portion is formed with an acute angle cross section perpendicular to the axial direction. preferable.

  According to this configuration, one of each outer surface pressure contact portion and each inner surface pressure contact portion formed at an acute angle is easily and appropriately deformed during press-fitting, so that the press-fitting pin can be smoothly press-fitted into the press-fitting hole. In addition, each outer surface pressure contact part may be formed in the cross section acute angle in the total pressure contact part, and each inner surface pressure contact part may be formed in the cross section acute angle in the total pressure contact part. Of course, among the plurality of pressure-contact portions, some of the pressure-contact portions may have each outer surface pressure-contact portion formed at an acute angle in cross section, and other pressure-contact portions may have each inner surface pressure-contact portion formed at an acute angle in cross-section.

  In these cases, it is preferable that the plurality of outer surface pressure contact portions and the plurality of inner surface pressure contact portions are provided at equal intervals in the circumferential direction.

  According to this configuration, the press-fitting pin and the press-fitting hole are press-contacted at a plurality of locations that are equally spaced in the circumferential direction, so that the mutual press-contact force is evenly distributed in the circumferential direction. Therefore, damage to the press-fitting hole and the press-fit pin can be avoided more effectively.

  In this case, it is preferable that the press-fitting hole has a circular cross section orthogonal to the axial direction, and the press-fitting pin has a cross section orthogonal to the axial direction formed in either a regular polygon or a star regular polygon. .

  According to this configuration, since the cross-sectional shapes of the press-fit pin and the press-fit hole are uniform in the circumferential direction, uniform strength can be given in the circumferential direction, and damage to the press-fit pin and the press-fit hole is effectively prevented. can do. Further, the cross-sectional shapes of the press-fit pin and the press-fit hole are not complicated, and the press-fit pin and the press-fit hole can be easily formed.

  A tape cartridge according to the present invention includes the above-described cartridge case and a print tape accommodated in the cartridge case as an accommodation.

  According to this configuration, the printing tape can be accommodated in the case cartridge that can press-fit the press-fit pin into the press-fit hole and join the first case and the second case.

  Hereinafter, a cartridge case and a tape cartridge to which the present invention is applied will be described with reference to the accompanying drawings. This tape cartridge accommodates a printing tape and an ink ribbon in a cartridge case, and is used for printing by being mounted on a tape printer equipped with a thermal head.

  As shown in FIG. 1, the tape cartridge 1 includes a cartridge case 2 having an upper and lower divided structure that constitutes an outer shell, and an ink ribbon 3 and a printing tape 4 that are distributed and accommodated in the front and rear of the cartridge case 2. ing. The printing tape 4 is wound so as to be freely fed out and is discharged from a tape discharge port 5 formed on the left side of the cartridge case 2 after printing. On the other hand, the ink ribbon 3 is wound so as to be freely fed out and is wound up in the cartridge case 2 after printing.

  The cartridge case 2 has a shape that is substantially complementary to a cartridge mounting portion that is recessed in a tape printer (not shown), and the tape cartridge 1 is detachably mounted on the cartridge mounting portion from above. ing. Further, the cartridge case 2 is formed with a head insertion portion 6 having a substantially rectangular shape in plan view through which a thermal head is inserted when the cartridge case 2 is attached to the cartridge attachment portion.

  The cartridge case 2 includes a first case 10 and a second case 20 made of resin that are separately molded by injection molding using independent molds. The first case 10 and the second case 20 are joined to each other. (First joining end face 17 and second joining end face 27 described later) are joined so as to abut each other. The cartridge mounting portion is mounted with the second case 20 facing downward.

  As shown in FIGS. 2 to 4, the first case 10 is integrally formed with a top wall portion 11 and a first peripheral wall portion 12 projecting along the peripheral edge thereof. A first head opening 13 to be the head insertion portion 6 is formed in the top wall portion 11. On the other hand, the second case 20 is integrally formed with a bottom wall portion 21 and a second peripheral wall portion 22 protruding along the periphery thereof. A second head opening 23 to be the head insertion portion 6 is formed in the bottom wall portion 21, and is formed integrally with the bottom wall portion 21 at the periphery so as to define the head insertion portion 6. An inner wall portion 24 is projected. The inner wall portion 24 is formed higher than the second peripheral wall portion 22 by the height of the first peripheral wall portion 12 so that the end surface thereof is joined to the edge portion 13a of the first head opening 13.

  The first case 10 and the second case 20 are joined so that the end surface of the first peripheral wall portion 12 and the end surface of the second peripheral wall portion 22 abut each other. At this time, the edge 13a of the first head opening 13 and the end face of the inner wall 24 are also in contact with each other. That is, the end surface of the first peripheral wall portion 12 in the first case 10 and the edge 13 a of the first head opening 13 are the joint end surface (first joint end surface 17) of the first case 10, and the second peripheral wall in the second case 20. The end face of the portion 22 and the end face of the inner wall portion 24 are the joining end face (second joining end face 27) of the second case 20.

  The cartridge case 2 includes six press-fit pins 15 formed integrally with the first joint end face 17 and six press-fit holes 25 formed in the second joint end face 27 corresponding to the six press-fit pins 15. ing. The six press-fit pins 15 are arranged so as to be dispersed from each other, five are provided on the end face of the first peripheral wall portion 12, and one is provided on the edge portion 13 a of the first head opening 13. ing. Similarly, the six press-fitting holes 25 are arranged so as to be dispersed from each other, five are provided on the end surface of the second peripheral wall portion 22, and one is provided on the inner wall portion 24. More specifically, the press-fit pins 15 and the press-fit holes 25 are provided in two sets on the left and right of the rear portion of the storage portion of the printing tape 4, two sets on the right and rear sides of the storage portion of the ink ribbon 3, and on the right rear portion of the head insertion portion 6. One set is disposed on the left front portion of the head insertion portion 6.

  Each press-fit pin 15 is formed in a columnar shape whose axial direction is the case thickness direction, and its tip is tapered. Each press-fit pin 15 has a star-shaped regular pentagonal cross section orthogonal to the axial direction, and has five outer surface press-contact portions 15a and five outer surface non-press contact portions 15b that press-contact the press-fit holes 25 at five locations in the circumferential direction. have. That is, the five apex portions of the star-shaped regular pentagonal section are five outer surface pressure contact portions 15a, and each outer surface pressure contact portion 15a is formed with an acute angle (36 °) in a cross section orthogonal to the axial direction. The six press-fit pins 15 are each formed to have a predetermined length, and are press-fitted simultaneously into the six press-fit holes 25 at the time of press-fit.

  On the other hand, each press-fitting hole 25 is formed so that the axial direction is the case thickness direction, and opens to the second peripheral wall portion 22 or the inner wall portion 24. Each press-fitting hole 25 has a circular cross section perpendicular to the axial direction, and in the circumferential direction, five inner surface press-contact portions 25a corresponding to the respective outer surface press-contact portions 15a and five corresponding to the respective outer surface non-press contact portions 15b. The inner surface non-pressure contact portion 25b is provided. In the present embodiment, each press-fitting hole 25 is formed in a bottomed shape with the bottom wall 21 side closed, but may be a through-hole that is also opened on the outer surface of the bottom wall 21.

  When joining the 1st case 10 and the 2nd case 20 which were comprised in this way, first, the front-end | tip part of each press-fit pin 15 is match | combined with the press-fit hole 25 corresponding. At this time, since the tip end portion of each press-fit pin 15 is formed in a taper shape, the tip end of the press-fit pin 15 is not held by the opening edge portion of the press-fit hole 25 at the time of press fit, and this operation can be performed appropriately. it can.

  Subsequently, when the first case 10 and the second case 20 are pressed together, the press-fit pins 15 are press-fitted into the press-fit holes 25, and the first case 10 and the second case 20 are joined. At this time, each outer surface pressure contact portion 15a is formed with an acute cross section, so that it is easily and appropriately deformed (crushed) during press-fitting. For this reason, each press-fit pin 15 can be smoothly press-fitted into each press-fit hole 25.

  Each press-fitting pin 15 and each press-fitting hole 25 are each provided in the circumferential direction with five press-contact portions 31 that are press-contacted to each other by the respective outer-surface press-contact portions 15a and the respective inner-surface press-contact portions 25a, and each outer-surface non-press-contact portion 15b and each inner-surface The five non-pressure-contact portions 32 formed by the non-pressure-contact portions 25b are formed so as to be in pressure-contact with each other. For this reason, at the time of press-fitting, each outer surface pressure contact portion 15a is mainly deformed in each pressure contact portion 31, but the deformation can be released to the non-pressure contact portion 32 adjacent in the circumferential direction. Thereby, the deviation from the design size of each press-fit pin 15 and each press-fit hole 25 can be absorbed.

  That is, when the press-fit pin 15 becomes larger than the design value due to a difference in molding conditions or the like, or when the press-fit hole 25 becomes smaller than the design value, the deformation amount of each outer surface press contact portion 15a increases. Appropriate press-fit state is achieved. On the contrary, when the press-fit pin 15 becomes smaller than the design value, or when the press-fit hole 25 becomes larger than the design value, the deformation amount of each outer surface press contact portion 15a decreases, and an appropriate press-fit state is obtained. . Accordingly, the first case 10 and the second case 20 can be joined by appropriately press-fitting the press-fit pins 15 into the press-fit holes 25 without strictly setting the sizes of the press-fit pins 15 and the respective press-fit holes 25. . Therefore, complicated adjustment of the mold is unnecessary, the production efficiency of the cartridge case 2 can be improved, and the production cost can be reduced.

  As described above, according to the tape cartridge 1 of the present embodiment, the press-fit pin 15 is appropriately press-fitted into the press-fit hole 25 without strictly setting the sizes of the press-fit pin 15 and the press-fit hole 25, so that the first case 10 and the second case 20 can be joined.

  In the present embodiment, each press-fit pin 15 is formed in a star-shaped regular pentagon in cross section and each press-fit hole 25 is formed in a circular shape in cross section. However, the shape of each press-fit pin 15 and each press-fit hole 25 is not limited to this. Each press-fit pin 15 has a plurality of outer surface press-contact portions 15a that press-contact with the press-fit holes 25 at a plurality of locations in the circumferential direction, and each press-fit hole 25 has a plurality of inner surface press-contacts corresponding to the respective outer surface press-contact portions 15a. What is necessary is just to have the some inner surface non-pressure-contact part 25b corresponding to the part 25a and each outer surface non-pressure-contact part 15b.

  However, it is more preferable that each press-fit pin 15 is formed in a regular polygon or a star-shaped regular polygon, and each press-fit hole 25 is formed in a circular shape as in the present embodiment. For example, as shown in FIG. 5, the cross-sectional shape of the press-fit pin 15 may be a regular triangle. According to this, each press-fitting pin 15 and each press-fitting hole 25 are press-contacted by a plurality of press-contact portions 31 that are equally spaced in the circumferential direction, so that the mutual press-contact force is evenly distributed in the circumferential direction. Therefore, damage to each press-fit pin 15 and each press-fit hole 25 can be avoided more effectively.

  In addition, since the cross-sectional shape (star-shaped pentagon, equilateral triangle, etc.) of each press-fit pin 15 and the cross-sectional shape (circular shape) of each press-fit hole 25 are uniform in the circumferential direction, each press-fit pin 15 and each press-fit hole 25. Furthermore, uniform strength can be provided in the circumferential direction, and damage to each press-fit pin 15 and each press-fit hole 25 can be effectively prevented. Moreover, the cross-sectional shape of each press-fit pin 15 and each press-fit hole 25 is not complicated, and each press-fit pin 15 and each press-fit hole 25 can be formed easily.

  As shown in FIG. 6, each press-fitting pin 15 is formed in a circular cross section, and each press-fitting hole 25 has a circular cross-sectional shape in which a plurality of peripheral edge portions (for example, four locations) are cut out in a wedge shape in the circumferential direction. You may form so that it may become. In this case, a plurality (four) of the notch portions in the cross-sectional shape of each press-fitting hole 25 become a plurality (four) inner surface pressure contact portions 25a. And it is preferable to form a some notch part (inner surface press-contact part 25a) at equal intervals in the circumferential direction, and according to this, each press-fit pin 15 and each press-fit hole 25 are the circumferential direction similarly to the above. Since a plurality of pressure contact portions 31 that are equally spaced are in pressure contact with each other, mutual pressure contact forces can be evenly distributed in the circumferential direction.

  As shown in FIG. 7, each press-fitting pin 15 is formed in a regular triangular cross section, and each press-fitting hole 25 is formed so that its cross-sectional shape is a circular shape with three peripheral edges cut out in the circumferential direction. May be. Here, among the six pressure contact portions 31, three outer pressure contact portions 15a are formed with acute cross-sections at three pressure contact portions 31, and each inner pressure contact portion 25a is formed with a sharp cross-sectional angle at the other three pressure contact portions 31. Is done. Also in this case, in one of the plurality of press contact portions 31, one of the outer surface press contact portions 15 a and the inner surface press contact portions 15 b formed at an acute angle is easily and appropriately deformed when press-fitted, so that the press-fit pin 15 is smoothly inserted into the press-fit hole. Can be press-fitted into.

  As shown in FIGS. 8 and 9, as a matter of course, the cross-sectional shape of each press-fit pin 15 is not limited to a regular polygon or a star regular polygon.

It is a perspective view of a tape cartridge concerning one embodiment of the present invention. It is a top view of the cartridge case disassembled into a first case and a second case. It is a front view of the cartridge case disassembled into a first case and a second case. It is sectional drawing which shows the 1st example of a press-fit pin and a press-fit hole. It is sectional drawing which shows the 2nd example of a press-fit pin and a press-fit hole. It is sectional drawing which shows the 3rd example of a press-fit pin and a press-fit hole. It is sectional drawing which shows the 4th example of a press-fit pin and a press-fit hole. It is sectional drawing which shows the 5th example of a press-fit pin and a press-fit hole. It is sectional drawing which shows the 6th example of a press-fit pin and a press-fit hole.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Tape cartridge 2 ... Cartridge case 4 ... Printing tape 10 ... 1st case 15 ... Press-fit pin 15a ... Outer surface press-contact part 15b ... Outer surface non-press-contact part 17 ... 1st joining end surface 25 ... Press-fit hole 25a ... Inner surface press-contact part 25b ... Inner surface Non-pressure contact portion 27 ... second joining end surface

Claims (5)

A cartridge case that is composed of a first case and a second case that are joined to each other, and that contains a contained item therein,
A press-fit pin formed on the joint end surface of the first case;
A press-fit hole formed on the joint end surface of the second case corresponding to the press-fit pin, into which the press-fit pin is press-fit,
The press-fit pin has a plurality of outer surface press-contact portions and a plurality of outer surface non-press contact portions that press-contact the press-fit holes at a plurality of locations in the circumferential direction.
The cartridge case, wherein the press-fitting hole has a plurality of inner surface pressing portions corresponding to the outer surface pressing portions and a plurality of inner surface non-pressing portions corresponding to the outer surface non-pressing portions.   In the plurality of pressure contact portions where the outer surface pressure contact portions and the inner surface pressure contact portions are in pressure contact, one of the outer surface pressure contact portions and the inner surface pressure contact portions has a cross section orthogonal to the axial direction formed at an acute angle. The cartridge case according to claim 1.   3. The cartridge case according to claim 1, wherein the plurality of outer surface pressure contact portions and the plurality of inner surface pressure contact portions are provided at equal intervals in the circumferential direction, respectively. The press-fitting hole has a circular cross section perpendicular to the axial direction,
The cartridge case according to claim 3, wherein the press-fit pin has a cross section perpendicular to the axial direction formed in one of a regular polygon and a star regular polygon. A cartridge case according to any one of claims 1 to 4,
A printing tape housed in the cartridge case as the container;
A tape cartridge comprising:

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