JP5109295B2 - Battery cover mounting structure - Google Patents

Description

  The present invention relates to a battery lid mounting structure used in electronic devices such as an electronic small computer, an electronic dictionary, a mobile phone, a portable information processing terminal (PDA: personal digital assistant), and a game machine.

2. Description of the Related Art Conventionally, in an electronic device such as an electronic small computer, as described in Patent Document 1, an operation battery storage portion and a backup battery storage portion are provided on the back surface of a device case, and these battery storage portions There are battery covers that are attached to the device case so as to be openable and closable.
Japanese Patent Laid-Open No. 7-7278

  In this case, the battery storage unit for operation stores a battery for operating the electronic device, and since the frequency of battery replacement is high, the battery lid covering the battery storage unit for operation is attached to the device case. It is configured to be slidably mounted and easily removable. On the other hand, the battery storage unit for backup stores a battery for storing data stored in the electronic device, and needs to be securely attached so that the battery lid is not easily removed due to an impact or the like.

  That is, since this backup battery needs to be replaced in a state where the battery is stored in the battery storage part for operation with a low replacement frequency, the battery cover covering the battery storage part for backup is an equipment case. After being slidably mounted on the device case, it is screwed to the device case by a screw member. In this case, the battery lid is provided with an insertion hole into which the screw member is inserted. In addition, the device case is provided with a screw hole into which the screw member is screwed, and a tapered chamfer without a screw groove is provided at the edge of the screw hole so that the screw member can be easily guided. Is provided.

  In such a conventional battery lid mounting structure, when the battery lid is slid and covered with the battery housing portion and screwed to the device case by the screw member, the screw groove is formed at the edge of the screw hole of the device case. Since there is no tapered chamfered part, the screw member can be easily screwed into the screw hole of the equipment case, but when the screw member is loosened and the battery cover is removed, the tip of the screw member When the screw reaches the chamfered portion of the edge of the screw hole, the screw member idles, so it is mistaken that the screw member has been extracted from the screw hole. There is a problem in that it is difficult to open the battery lid by being caught in the chamfered portion of the hole.

  The problem to be solved by the present invention is to provide a battery lid mounting structure that prevents the screw member from being caught and allows the battery lid to be easily removed.

According to the first aspect of the present invention , a screw insertion hole is provided in a battery lid that is slidably attached to the main body case and covers a battery housing provided in the main body case, and a screw member is inserted into the screw insertion hole. In the battery lid mounting structure for mounting the battery lid to the main body case by screwing into a screw hole having a chamfered portion provided in the main body case,
A location corresponding to the screw insertion hole on the inner surface of the battery lid is provided with a pedestal portion having a pair of locking projections, and a metal plate attached to the pedestal portion,
The metal plate has an engagement hook portion that engages with one locking projection portion of the pedestal portion and an engagement hole portion that engages with the other locking projection portion of the pedestal portion,
The battery lid mounting structure is characterized in that a holding hole for holding the screw member when the screw member is screwed into the metal plate is provided corresponding to the screw hole of the main body case.

The invention according to claim 2 is the battery lid mounting structure according to claim 1, wherein the metal plate has substantially the same thickness as the pitch of the thread grooves of the screw member.

According to a third aspect of the present invention , a screw insertion hole is provided in a battery lid that is slidably attached to a main body case and covers a battery housing provided in the main body case, and a screw member is inserted into the screw insertion hole. In the battery lid mounting structure for mounting the battery lid to the main body case by screwing into a screw hole having a chamfered portion provided in the main body case,
The screw insertion hole of the battery lid is provided with a screw groove into which the screw member is screwed, and the screw member includes a first screw part screwed into the screw hole of the main body case, and the battery. A second screw portion that is screwed into the screw insertion hole of the lid; and a constricted portion provided between the first and second screw portions, the second screw portion being the screw insertion of the battery lid. In the battery lid mounting structure, the first screw portion is detached from the screw hole of the main body case when the screw is screwed into the hole.

According to the first aspect of the present invention, the metal plate is attached to the inner surface of the battery lid so as to be close to the screw hole of the main body case, and the screw member is screwed into the metal plate to hold the screw member. Since the holes are provided so as to correspond to the screw holes of the main body case, even when the screw member is loosened and the battery cover is removed from the main body case, even if the tip of the screw member is detached from the screw hole of the main body case, Since the tip portion is screwed into and held in the holding hole of the metal plate, the screw member can be further loosened without idling, so that the tip of the screw member can be loosened in the screw hole of the main body case. Can be completely extracted from the edge of the. Furthermore, the metal plate is provided with an engagement hook portion and an engagement hole portion that are respectively engaged with the pair of locking projections of the pedestal portion, so that the pair of the hooks provided on the pedestal portion of the battery lid is provided. The metal plate can be easily attached to the pedestal portion simply by engaging with the locking projections.

  For this reason, even if a chamfered portion without a screw groove is provided at the edge of the screw hole of the main body case so that the screw member can be easily guided, the screw member does not run idle, and the tip end portion of the screw member is moved to the main body case. Can be completely extracted from the chamfered portion provided at the edge of the screw hole. Thus, when the battery cover is slid in this state, the tip of the screw member is not caught on the edge of the screw hole of the main body case, and the battery cover is slid reliably and smoothly and easily removed from the main body case. be able to.

  According to the third aspect of the present invention, the screw groove into which the screw member is screwed into the screw insertion hole of the battery lid is provided, and the screw member is screwed into the screw hole of the main body case; A second screw portion that is screwed into the screw insertion hole of the battery lid, and a constricted portion provided between the first and second screw portions, the second screw portion being screwed into the screw insertion hole of the battery lid. When the battery member is removed from the main body case by detaching the battery member from the main body case by detaching the first screw portion from the screw hole of the main body case in the joined state, the tip of the first screw portion of the screw member Even if the screw is detached from the screw hole of the main body case, the second screw part is screwed into the screw insertion hole of the battery cover, so that the screw member does not idle, and the screw member is further loosened so that the constricted part of the screw member is removed. It can be inserted into the screw insertion hole of the battery lid.

  Thereby, the 1st screw part of a screw member can be completely extracted from the edge of the screw hole of a main part case. For this reason, as in the first aspect of the present invention, even if a chamfered portion without a thread groove is provided at the edge of the screw hole of the main body case so that the screw member can be easily guided, the screw member does not idle. In addition, the first screw portion of the screw member can be completely extracted from the chamfered portion provided at the edge of the screw hole of the main body case. Further, when the second screw portion of the screw member is detached from the screw insertion hole of the battery lid, the constricted portion of the screw member is inserted into the screw insertion hole of the battery lid and rotates idly, so that the first screw portion of the screw member is the main body case. It can be confirmed that the screw hole is completely removed from the screw hole.

  Therefore, it can be confirmed that the battery cover is slidable. When the battery cover is slid in this state, the tip of the screw member is not caught by the edge of the screw hole of the main body case, and the battery cover is removed. It can be reliably and smoothly slid and easily removed from the main body case. In this case, since the metal plate as in the invention described in claim 1 is not used, the number of parts can be reduced and the assembling work can be simplified.

(Embodiment 1)
A first embodiment in which the present invention is applied to an electronic small computer will be described below with reference to FIGS.
1 is a front view of an electronic small computer to which the present invention is applied, FIG. 2 is a rear view of the electronic small computer of FIG. 1, and FIG. 3 shows a state in which a battery cover of the electronic small computer of FIG. 2 is removed. FIG. 4 is an exploded perspective view, and FIG. 4 is an enlarged cross-sectional view of a main part taken along the line AA in FIG.
As shown in FIGS. 1 to 4, the electronic small computer includes a device case 1.

  The device case 1 is composed of an upper case 2 and a lower case 3, and a key input unit 4, a display unit 5, a battery storage unit 6, and a circuit board 7 (see FIG. 4) are provided therein. Various electronic components (not shown) necessary for the calculation function are provided. As shown in FIG. 1, the key input unit 4 has various keys 4 a such as a numeric keypad, function keys, and cursor keys, and these keys 4 a are exposed from the upper case 2 to the upper surface side. The display unit 5 includes a flat display element such as a liquid crystal display element or an EL (electroluminescence) display element. As shown in FIG. Information such as input data and calculation results thereof is configured to be displayed electro-optically.

  As shown in FIG. 4, the battery storage unit 6 stores the battery 8, and is provided on the upper side of the device case 1 as shown in FIGS. 2 and 3. 3 to 5, it is open to the upper surface side) and, as shown in FIGS. 2 to 5, is configured to be covered with a battery lid 9 so as to be opened and closed. As shown in FIGS. 2 to 5, the battery lid 9 is slidably mounted on the back surface of the lower case 3 (upper surface in FIGS. 2 to 5) to cover the battery housing 6, and in this state, the screw member 10. Is configured to be screwed to the lower case 3.

  That is, a nut 11 is embedded in the lower case 3 as shown in FIG. As shown in FIGS. 6 (a) and 6 (b), the nut 11 is provided with a screw hole 12 penetrating vertically, and a screw member 10 is provided at the edge of the screw hole 12. A chamfered portion 12a without a thread groove is provided to facilitate guiding. 2 and 3, the battery cover 9 is slid from the upper side of the lower case 3 and attached to the lower case 3. The battery cover 9 is substantially formed in a flat plate shape as shown in FIGS. As shown in FIG. 5, a portion corresponding to the upper side of the lower case 3 is formed in a shape curved along the shape of the upper side of the device case 1.

  As shown in FIGS. 4 and 5, the battery lid 9 has a screw insertion hole 13 into which the screw member 10 is screwed, and the nut 11 of the lower case 3 when the battery lid 9 is attached to the lower case 3. Are provided corresponding to the screw holes 12. In this case, the screw insertion hole 13 has a configuration in which a screw groove (not shown) for screwing the screw member 10 is provided on the inner peripheral surface thereof. Further, as shown in FIG. 4, counterbore portions 14 are provided on the outer surface of the battery lid 9 so as to correspond to the screw insertion holes 13.

  Further, as shown in FIGS. 4 and 7, a mounting base portion 15 for arranging the metal plate 16 is provided on the inner surface of the battery lid 9. As shown in FIG. 4, the mounting base 15 is for placing the metal plate 16 close to the nut 11 of the lower case 3, and is formed in a rectangular frame shape as shown in FIG. The battery cover 9 is provided on the inner surface of the battery cover 9 at locations corresponding to the screw insertion holes 13 of the battery cover 9 and the nuts 11 of the lower case 3.

  The metal plate 16 is made of a thin metal such as aluminum or stainless steel, and a holding hole 17 at the center of the metal plate 16 corresponds to the screw insertion hole 13 of the battery lid 9 with the space in the frame-shaped mounting base 15 interposed therebetween. The screw holes 12 of the nut 11 of the lower case 3 are also provided correspondingly. The holding hole 17 of the metal plate 16 is for holding the screw member 10 when the screw member 10 is screwed in, and the thickness of the metal plate 16 is a thread groove of a screw portion 10a described later in the screw member 10. By being almost as thin as the pitch, the inner peripheral surface of the holding hole 17 bites into the thread groove of the screw member 10, whereby the screw portion 10 a of the screw member 10 is screwed.

  On the other hand, as shown in FIG. 4, the screw member 10 is provided with a screw portion 10a that is screwed into the screw hole 12 of the nut 11 of the lower case 3 on the tip end side (lower end portion side in the figure). A neck lower part 10b to be inserted without screwing into the screw insertion hole 14 of the battery lid 9 is provided at the upper end of the part 10a, and the neck lower part 10b is disposed at the spot facing part 14 of the battery lid 9 at the upper end. The head portion 10c is provided, and the outer diameter of the screw portion 10a is slightly larger than the outer diameter of the neck lower portion 10b.

  As a result, as shown in FIG. 4, when the screw portion 10 a is screwed into the screw insertion hole 13 of the battery lid 9, the screw member 10 is inserted into the screw insertion hole 13 and the screw portion 10 a. 10a passes through the space of the mounting base 15 and is screwed into the holding hole 17 of the metal plate 16. In this state, the screw portion 10a is screwed into the screw hole 12 of the nut 11 provided in the lower case 3, The head 10 c is arranged on the counterbore 14 of the battery lid 9 so that the battery lid 9 is screwed to the lower case 3.

  By the way, as shown in FIGS. 7, 10, and 11, locking projections 18 are respectively formed on both sides in the longitudinal direction of the frame-shaped mounting base 15 provided on the inner surface of the battery lid 9. . As shown in FIGS. 7 and 9, the metal plate 16 attached to the attachment pedestal portion 15 is formed in a rectangular shape having the same size as the attachment pedestal portion 15 as a whole. One end of the metal plate 16 in the longitudinal direction (left end in FIG. 9) is an engagement hook that is detachably engaged with one locking projection 18 of the mounting base 15 (left in FIG. 10). A portion 19 is provided, and the other end portion (right end portion in FIG. 9) of the metal plate 16 is detachably engaged with the engaging projection portion 18 on the other side (right side in FIG. 10) of the mounting base portion 15. A mating engagement hole 20 is provided.

  Thereby, as shown in FIG. 10, the metal plate 16 engages the engagement hole portion 20 with the engagement protrusion portion 18 on the right side of the attachment base portion 15, and in this state, the engagement hook portion 19 is attached to the attachment base portion. By engaging with the locking projection 18 on the left side of the portion 15, as shown in FIG. In this case, on both sides in the width direction of the metal plate 16, lateral shake prevention portions 21 that are in contact with both side surfaces along the longitudinal direction of the mounting base portion 15 and restrict the position in the width direction of the metal plate 16 are respectively provided. Yes.

Next, a case where such a battery lid 9 is attached to the device case 1 will be described.
At this time, first, the battery 8 is stored in the battery storage 6 of the device case 1, and in this state, the battery cover 9 is slid from the upper side end of the lower case 3 and attached to the lower case 3. The battery housing part 6 is covered and closed with the battery lid 9. In this state, as shown in FIGS. 4 and 12, the screw insertion hole 13 of the battery lid 9 and the holding hole 17 of the metal plate 16 attached to the attachment base 15 are provided in the lower case 3. Since it corresponds to the screw hole 12 of the nut 11, the screw member 10 is inserted from the screw insertion hole 13 of the battery lid 9 from the outside of the battery lid 9 (upward in FIG. 4), and the screw hole of the nut 11 of the lower case 3. The battery lid 9 can be screwed to the lower case 3 by being screwed onto the battery 12.

  That is, as shown in FIG. 12, when the screw portion 10 a on the tip side of the screw member 10 is screwed into the screw insertion hole 13 of the battery lid 9, the neck lower portion 10 b is inserted into the screw insertion hole 13. The screw portion 10 a passes through the space portion of the mounting base portion 15 and is screwed into the holding hole 17 of the metal plate 16. When the screw member 10 is further tightened in this state, the screw portion 10a screwed into the holding hole 17 of the metal plate 16 is screwed into the screw hole 12 of the nut 11 provided in the lower case 3 as shown in FIG. In this state, the head 10c is disposed on the counterbore 14 of the battery lid 9. Thereby, the battery lid 9 is screwed to the lower case 3.

  When the battery cover 9 is removed from the device case 1, first, when the screw member 10 is loosened, as shown in FIG. 12, the screw portion 10 a of the screw member 10 is a screw of the nut 11 provided on the lower case 11. Detach from hole 12. At this time, since the tip of the screw portion 10a of the screw member 10 is screwed and held in the holding hole 17 of the metal plate 16 attached to the mounting base portion 15 of the battery lid 9, the screw member 10 is idled. In addition, the screw member 10 can be further loosened. Thereby, the front-end | tip part of the screw part 10a of the screw member 10 can be made to detach | leave from the holding hole 17 of the metal plate 16, and by sliding the battery cover 9 in the arrow direction in this state, as shown in FIG. The battery lid 9 can be removed from the device case 1.

  Thus, according to the mounting structure of the battery lid 9, the mounting base portion 15 is provided on the inner surface of the battery lid 9 provided with the screw insertion hole 13, and the metal plate 16 is attached to the mounting base portion 15 of the lower case 3. Since the screw member 10 is fitted close to the nut 11 and the screw member 10 is screwed into the metal plate 16, the holding hole 17 for holding the screw member 10 is provided corresponding to the screw hole 12 of the nut 11. Even when the tip of the screw member 10 is detached from the screw hole 12 of the nut 11 provided in the lower case 3 when the battery cover 9 is removed from the lower case 3 of the device case 1 by loosening 10. Since the tip portion is screwed and held in the holding hole 17 of the metal plate 16, the screw member 10 can be further loosened without causing the screw member 10 to idle.

  Thereby, the front-end | tip part of the screw member 10 can be completely extracted from the edge part of the screw hole 12 of the nut 11 provided in the lower case 3. FIG. For this reason, even if a chamfered portion 12 a without a thread groove for facilitating the screw member 10 to be guided is provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3, the tip end portion of the screw member 10. Can be completely extracted from the chamfered portion 12 a provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3. Thereby, when the battery cover 9 is slid in this state, the tip of the screw member 10 is not caught on the edge of the screw hole 12 in the nut 11 of the lower case 3, and the battery cover 9 is slid reliably and smoothly. And can be easily removed from the lower case 3.

  In this case, an attachment base 15 for placing the metal plate 16 close to the nut 11 of the lower case 3 is provided on the inner surface of the battery lid 9, and both ends of the attachment base 15 in the longitudinal direction are engaged. Stop projections 18 are provided, and an engagement hook 19 and an engagement hole 20 are provided at both ends of the metal plate 16 so as to be detachably engaged with the engagement projections 18 of the mounting base 15. Therefore, the engagement hole 20 of the metal plate 16 is engaged with one of the locking projections 18 of the mounting base 15, and the engagement hook 19 of the metal plate 16 is engaged with the other of the mounting base 15. The metal plate 16 can be easily attached to the mounting pedestal simply by engaging with the locking projection 18, and thereby the inner surface of the battery lid 9 with the metal plate 16 approaching the nut 11 of the lower case 3. Can be reliably and easily attached.

  Further, on both sides of the metal plate 16 in the width direction, lateral shake prevention portions 21 that abut on both side surfaces along the longitudinal direction of the mounting base portion 15 and restrict the position of the metal plate 16 in the width direction are provided. Therefore, when the metal plate 16 is attached to the attachment base portion by engaging the engagement hook portion 19 and the engagement hole portion 20 of the metal plate 16 with the respective locking projections 18 of the attachment base portion 15 of the battery lid 9. In addition, the lateral direction of the metal plate 16 can be regulated by the lateral shake prevention unit 21. As a result, the metal plate 16 can be accurately positioned on the mounting base 15, and the holding hole 17 of the metal plate 16 can be made to correspond exactly to the screw hole 12 of the nut 11 of the lower case 3.

(Embodiment 2)
Next, a second embodiment in which the present invention is applied to an electronic small computer will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
This electronic small computer has a configuration in which the screw member 24 for attaching the battery cover 9 to the lower case 3 of the device case 1 is formed in a shape different from that of the first embodiment without using the metal plate 16, and the other embodiments are the same. 1 is almost the same configuration.

  That is, as shown in FIGS. 14 and 15, the screw member 24 includes a lower first screw portion 25 that is screwed into the screw hole 12 of the nut 11 embedded in the lower case 3, and a screw of the battery lid 9. The upper second screw portion 26 screwed into the insertion hole 13, the constricted portion 27 provided between the first and second screw portions 25, 26, and the end of the upper second screw portion 26 (FIG. 15). In the upper end portion) and a head portion 28 disposed on the counterbore portion 14 of the battery lid 9, and the upper second screw portion 27 is screwed into the screw insertion hole 13 of the battery lid 9. The lower first screw portion 25 is configured to be detached from the screw hole 12 of the nut 11 of the lower case 3 when the state is in the state.

  In this case, the upper second screw portion 26 screwed into the screw insertion hole 13 of the battery lid 9 is formed to have a length slightly longer than the length of the screw hole 12 of the nut 11 provided in the lower case 3. In addition, it is formed slightly longer than the length of the first screw portion 25 on the lower side that is screwed into the screw hole 12 of the nut 11. As a result, the screw member 24 maintains the state in which the upper second screw portion 27 is screwed into the screw insertion hole 13 of the battery lid 9. The constricted portion 27 is configured to be rotatably inserted into the screw insertion hole 13 when it is detached from the screw hole 12 of the nut 11 and the upper second screw portion 27 is detached from the screw insertion hole 13 of the battery lid 9. Has been.

  According to the mounting structure of the battery lid 9 in such an electronic small computer, the screw member 24 has a lower first screw portion 25 that is screwed into the screw hole 12 of the nut 11 provided in the lower case 3; The upper second screw portion 26 screwed into the screw insertion hole 13 of the battery lid 9 and a constricted portion 27 provided between the first and second screw portions 25, 26, and the upper second screw When the portion 26 is screwed into the screw insertion hole 13 of the battery lid 9, the lower first screw portion 25 is detached from the screw hole 12 of the nut 11 provided in the lower case 3. When the screw member 24 is loosened and the battery cover 9 is removed from the lower case 3, even if the tip of the first screw portion 25 of the screw member 24 is detached from the screw hole 12 of the nut 11 of the lower case 3, 2 Since the screw part 26 is screwed into the screw insertion hole 13 of the battery lid 9, the screw member 2 There does not idling, it is possible to further loosen the screw member 24.

  For this reason, the first screw portion 25 of the screw member 24 can be completely extracted from the edge portion of the screw hole 12 of the nut 11 provided in the lower case 3. Thereby, similarly to Embodiment 1, even if the chamfered portion 12a without the thread groove for facilitating the screw member 24 to be guided is provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3, The first screw portion 25 of the screw member 24 can be completely extracted from the chamfered portion 12 a provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3. Further, when the second screw portion 26 of the screw member 24 is detached from the screw insertion hole 13 of the battery lid 9, the constricted portion 27 of the screw member 24 is inserted into the screw insertion hole 13 of the battery lid 9 and idles. It can be confirmed that the 24 first screw portions 25 are completely removed from the screw holes 12 of the nut 11 of the lower case 3.

  Thereby, it can be confirmed that the battery lid 9 can be slid, and when the battery lid 9 is slid in this state, the tip of the first screw portion 25 of the screw member 24 is connected to the screw hole 12 of the nut 11. The battery lid 9 can be reliably and smoothly slid and removed from the lower case 3 easily without being caught on the edge. In this case, since the metal plate 16 as in the first embodiment is not used, the number of parts can be reduced and the assembly work can be simplified, thereby reducing the cost. Can be provided.

(Embodiment 3)
Next, a third embodiment in which the present invention is applied to an electronic small computer will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
This electronic small computer is configured to include a spring member 30 that urges the screw member 10 in a direction away from the nut 11 of the lower case 3 in place of the metal plate 16 of the first embodiment, and the other embodiments. 1 is almost the same configuration.

  That is, the spring member 30 is a substantially conical coil spring, and as shown in FIGS. 19A and 19B, one end portion (the lower end portion in FIG. 19) is a counterbore portion of the battery lid 9. 14 is formed in a large-diameter portion 30a having the same size as the inner diameter of 14, and gradually becomes smaller in diameter toward the other end side (upper end side in FIG. 19), and the inner diameter of the small-diameter portion 30b located at the extreme end is screwed. When the member 10 is formed to have substantially the same outer diameter as the outer diameter of the member 10 and is contracted by being pressed from both ends, the small-diameter portion 30b side is sequentially arranged in the large-diameter portion 30a at one end portion so that the whole becomes substantially flat. It is configured as follows.

  Further, as shown in FIG. 21, the spring member 30 has a large-diameter portion 30 a at one end disposed in the counterbore portion 14 of the battery lid 9, and in this state, the screw member 10 is the other end of the spring member 30. When the screw portion 10a of the screw member 10 is screwed into the screw hole 12 of the nut 11 provided in the lower case 3, as shown in FIG. 18, the small diameter portion 30b of the spring member 30 is inserted. Are pressed by the head portion 10c of the screw member 10 and are sequentially compressed and arranged in the large-diameter portion 30a of the spring member 30.

  According to the mounting structure of the battery lid 9 in such an electronic small computer, the screw member 10 includes the spring member 30 that urges the screw member 10 in a direction away from the nut 11 provided in the lower case 3. When the battery cover 9 is removed from the lower case 3 by loosening, the tip of the screw portion 10a of the screw member 10 reaches the edge of the screw hole 12 of the nut 11 provided in the lower case 3, and the screw hole 12 When the screwing of the threaded portion 10a is released, the screw member 10 can be forcibly separated from the nut 11 of the lower case 3 by the spring force of the spring member 30. Thereby, the front-end | tip part of the screw part 10a of the screw member 10 can be completely extracted from the edge part of the screw hole 12 of the nut 11 provided in the lower case 3. FIG.

  For this reason, as in the first embodiment, even if a chamfered portion 12a without a thread groove is provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3 so that the screw member 10 is easily guided. The tip of the screw portion 10 a of the screw member 10 can be completely extracted from the chamfered portion 12 a provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3. Thus, when the battery lid 9 is slid in this state, the tip of the screw portion 10a of the screw member 10 is not caught on the edge of the screw hole 12 of the nut 11 provided in the lower case 3, and the battery lid 9 Can be reliably and smoothly slid and removed from the lower case 3 easily.

  In the third embodiment, the case where the spring member 30 that is a substantially conical coil spring is used as the biasing member that biases the screw member 10 in the direction away from the nut 11 of the lower case 3 has been described. For example, a spring member such as a leaf spring may be used, and not only the spring member but also an elastic member such as rubber may be used.

(Embodiment 4)
Next, a fourth embodiment in which the present invention is applied to an electronic small computer will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
In this electronic small computer, instead of the metal plate 16 of the first embodiment, the battery lid 9 is provided with the first magnet 41 and the screw member 10 is provided with the second magnet 42, and the first and second magnets 41, 42 are provided. Are configured so as to repel each other in a direction in which the screw member 10 is pulled away from the nut 11 provided in the lower case 3, and the other configuration is substantially the same as that of the first embodiment.

  That is, as shown in FIGS. 22 to 25, the first magnet 41 is formed in a ring shape into which the screw portion 10 a of the screw member 10 is inserted, and is embedded in the counterbore portion 14 of the battery lid 9. Similarly to the first magnet 41, the second magnet 42 is formed in a ring shape into which the male screw portion 10 a of the screw member 10 is inserted, and repels the inner surface of the head portion 10 c of the screw member 10 against the magnetic force of the first magnet 41. It is provided to do.

  According to the mounting structure of the battery lid 9 in such an electronic small computer, the first magnet 41 is provided on the counterbore portion 14 of the battery lid 9, and the second magnet 41 is provided on the head portion 10c of the screw member 10. The first and second magnets 41 and 42 repel each other in the direction of pulling the screw member 10 away from the nut 11 provided in the lower case 3, thereby loosening the screw member 10 and removing the battery cover 9 from the lower case 3. Sometimes, when the tip of the screw part 10a of the screw member 10 reaches the edge of the screw hole 12 of the nut 11 provided in the lower case 3, and the screwing of the screw part 10a to the screw hole 12 is released, The screw member 10 can be forcibly separated from the nut 11 of the lower case 3 by the repulsive force of the first and second magnets 41 and 42.

  Thereby, the front-end | tip part of the screw part 10a of the screw member 10 can be completely extracted from the edge part of the screw hole 12 of the nut 11 provided in the lower case 3. FIG. For this reason, as in the first embodiment, even if a chamfered portion 12a without a thread groove is provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3 so that the screw member 10 is easily guided. The tip of the screw portion 10 a of the screw member 10 can be completely extracted from the chamfered portion 12 a provided at the edge of the screw hole 12 of the nut 11 provided in the lower case 3. Thus, when the battery lid 9 is slid in this state, the tip of the screw portion 10a of the screw member 10 is not caught on the edge of the screw hole 12 of the nut 11 provided in the lower case 3, and the battery lid 9 Can be reliably and smoothly slid and removed from the lower case 3 easily.

  In the first to fourth embodiments, the case where the nut 11 having the screw hole 12 is provided in the lower case 3 is described. However, the nut 11 is not necessarily provided in the lower case 3, and the screw hole is directly formed in the lower case 3. 12 may be used. Even with such a configuration, the same effects as those of the first to fourth embodiments can be obtained.

  In the first to fourth embodiments, the case where the battery lid mounting structure is applied to an electronic small computer has been described. However, the electronic lid is not necessarily an electronic small computer, and an electronic dictionary, a mobile phone, and a portable information processing are not required. The present invention can be widely applied to electronic devices such as terminals (PDA: Personal Digital Assistant) and game machines.

It is a front view of the electronic small computer to which this invention is applied. (Embodiment 1) It is a reverse view of the electronic small computer of FIG. It is the disassembled perspective view which showed the state which removed the battery cover of the electronic small computer of FIG. It is an expanded sectional view of the principal part in the AA arrow of FIG. It is the perspective view which decomposed | disassembled the lower case and battery cover in FIG. The nut of FIG. 4 is shown, (a) is the perspective view of the nut, (b) is the expanded sectional view in the BB arrow. FIG. 6 is an exploded perspective view of a main part of the battery cover shown in FIG. The battery cover of FIG. 4 is shown, (a) is the side view, (b) is the back view. It is the expansion perspective view which showed the metal plate of FIG. It is the expanded side view which showed the state in the middle of attaching the metal plate of FIG. 9 to the attachment base part of a battery cover. It is the expanded side view which showed the state which attached the metal plate of FIG. 10 to the attachment base part of the battery cover. It is an expanded sectional view of the principal part which showed the state which loosened the screw member in the state of FIG. It is an expanded sectional view of the principal part which showed the state which slides and removes a battery cover in the state of FIG. It is an expanded sectional view of the principal part in the electronic small computer to which this invention is applied. (Embodiment 2) It is the front view which expanded and showed the screw member of FIG. It is the expanded sectional view of the principal part which showed the state which loosened the screw member in the state of FIG. It is an expanded sectional view of the principal part which showed the state which slides and removes a battery cover in the state of FIG. It is an expanded sectional view of the principal part in the electronic small computer to which this invention is applied. (Embodiment 3) The spring member of FIG. 18 is shown, (a) is the expansion perspective view of the spring member, (b) is the front view. It is the expanded sectional view of the principal part which showed the state which loosened the screw member in the state of FIG. It is an expanded sectional view of the principal part which showed the state which slides and removes a battery cover in the state of FIG. It is an expanded sectional view of the principal part in the electronic small computer to which this invention is applied. (Embodiment 4) It is the disassembled perspective view which expanded and showed the 1st, 2nd magnet and screw member of FIG. It is the expanded sectional view of the principal part which showed the state which loosened the screw member in the state of FIG. It is an expanded sectional view of the principal part which showed the state which slides and removes a battery cover in the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Device case 2 Upper case 3 Lower case 9 Battery cover 10, 24 Screw member 10a Screw part 10b Neck lower part 10c, 28 Head 11 Nut 12 Screw hole 12a Chamfered part 13 Screw insertion hole 15 Mounting base part 16 Metal plate 17 Holding hole DESCRIPTION OF SYMBOLS 18 Locking projection part 19 Engagement hook part 20 Engagement hole part 25, 26 1st, 2nd screw part 27 Constriction part 30 Spring member 41, 42 1st, 2nd magnet

Claims (3)

A screw insertion hole is provided in a battery cover that is slidably attached to the main body case and covers a battery housing provided in the main body case, and a chamfered portion provided in the main body case by inserting a screw member into the screw insertion hole. In the battery lid mounting structure for mounting the battery lid to the main body case by screwing into a screw hole having
A location corresponding to the screw insertion hole on the inner surface of the battery lid is provided with a pedestal portion having a pair of locking projections, and a metal plate attached to the pedestal portion,
The metal plate has an engagement hook portion that engages with one locking projection portion of the pedestal portion and an engagement hole portion that engages with the other locking projection portion of the pedestal portion,
Mounting structure of the battery cover, wherein the threaded member to the metal plate is provided above the holding hole for holding the screw member so as to correspond to the screw holes of the main body case by screwing. The battery lid mounting structure according to claim 1, wherein the metal plate has substantially the same thickness as a pitch of the thread grooves of the screw member . A screw insertion hole is provided in a battery cover that is slidably attached to the main body case and covers a battery housing provided in the main body case, and a chamfered portion provided in the main body case by inserting a screw member into the screw insertion hole. In the battery lid mounting structure for mounting the battery lid to the main body case by screwing into a screw hole having
The screw insertion hole of the battery lid is provided with a screw groove into which the screw member is screwed, and the screw member includes a first screw part screwed into the screw hole of the main body case, and the battery. A second screw portion that is screwed into the screw insertion hole of the lid; and a constricted portion provided between the first and second screw portions, the second screw portion being the screw insertion of the battery lid. An attachment structure of a battery lid, wherein the first screw portion is detached from the screw hole of the main body case when the screw is engaged with the hole.

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