JP2019197776A - Electronic device - Google Patents

Abstract

To inhibit a component from being broken owing to excessive fastening of a screw by making it easy to know that fastening torque to the screw reaches prescribed torque.SOLUTION: An electronic device 10 comprises an enclosure 12, a screw hole 42, a door 28, a screw 70, a first corner part 46, and a second corner part 66. The screw hole 42 is bored in the enclosure 12, and the door 28 is supported by the enclosure 12 to be opened and closed. The screw 70 is screwed in the screw hole 42 to fix the door 28 in a closed state. The first corner part 46 is provided to the enclosure 12, and the second corner part 66 is provided to the door 28. The second corner part 66 abuts on the first corner part 46 in an axial direction of the screw 70 in a state in which the door 28 is closed and the screw 70 is screwed in the screw hole 42. Further, the second corner part 66 moves beyond the first corner part 46 when the screw 70 is further screwed in the screw hole 42 and fastening torque to the screw 70 reaches prescribed torque.SELECTED DRAWING: Figure 1

Description

  The technology disclosed in the present application relates to an electronic device.

  The electronic device includes a housing, a screw hole provided in the housing, a door supported to be openable / closable in the housing, and a screw that is screwed into the screw hole to fix the door in a closed state. There are some (see, for example, Patent Document 1).

  By the way, in such an electronic device, when the tightening torque of the screw is large, there is a possibility that the component may be broken, for example, the screw is broken or the screw hole is damaged. Therefore, in order to suppress breakage of parts, it is considered effective to inform a user who performs tightening of a screw that the tightening torque of the screw has reached a specified torque.

  Here, as a technique for notifying the user that the tightening torque of the screw has reached the specified torque, for example, there is the following (for example, see Patent Document 2). That is, the illustrated technique is formed on the contact surface of the first tube body having a screw at the tip, the second tube body having a screw hole at the tip, and the second tube body in the first tube body. And a plurality of convex protrusions formed on the contact surface of the second tubular body with the first tubular body.

  In this example technique, when a screw is screwed into a screw hole and tightening of the screw is close to completion, a plurality of protrusions are engaged with a plurality of engagement parts, and a plurality of protrusions are a plurality of protrusions. The screw tightening torque is changed by repeating the state of being withdrawn from the engaging portion. In addition, by changing the screw tightening torque in this way, the user can be informed that the screw tightening is almost completed.

  In the illustrated technique, when the contact surfaces of the first tube body and the second tube body come into contact with each other, the screw tightening torque is maximized. Then, the screw tightening torque becomes maximum after the screw tightening torque varies in this way, so that the user can be informed that the screw tightening is completed.

JP 2009-277744 A Japanese Patent Application Laid-Open No. 64-65383

  However, as mentioned above, the technology that informs the user that the screw has been tightened by maximizing the screw tightening torque, after all, at what timing has the screw tightening been completed? It is difficult to understand (that is, whether the screw tightening torque has reached the specified torque).

  In view of the above circumstances, the technology disclosed in the present application aims to provide an electronic device capable of suppressing damage to a component due to excessive tightening of a screw by making it easy to understand that the tightening torque of the screw has reached a specified torque. And

  In order to achieve the above object, according to the technology disclosed in the present application, an electronic device including a housing, a screw hole, a door, a screw, a first corner, and a second corner is provided. . The screw hole is provided in the housing, and the door is supported by the housing so as to be opened and closed. The screw is screwed into the screw hole to fix the door closed. The first corner is provided on the housing, and the second corner is provided on the door. The second corner portion is in contact with the first corner portion in the axial direction of the screw when the door is closed and the screw is screwed into the screw hole. Further, the second corner portion gets over the first corner portion when the screw is further screwed into the screw hole and the tightening torque of the screw reaches the specified torque.

  According to the technology disclosed in the present application, it is possible to easily understand that the tightening torque of the screw has reached the specified torque, and thus it is possible to suppress damage to the component due to excessive tightening of the screw.

It is a perspective view of the electronic device concerning this embodiment. It is an enlarged view of the peripheral part of the door in the electronic device of FIG. It is a figure which shows the state by which the door of FIG. 2 was closed. It is a front view which shows the state which assembled | attached the base member of FIG. 3, a door, and the screw. It is a disassembled perspective view of the base member of FIG. 4, a door, and a screw. FIG. 6 is a front view showing a state before the screw tightening torque of FIG. 5 reaches a specified torque. FIG. 6 is a side view showing a state before the tightening torque of the screw of FIG. 5 reaches a specified torque. FIG. 6 is a front view showing a state in which the tightening torque of the screw of FIG. 5 has reached a specified torque. FIG. 6 is a side view showing a state in which the tightening torque of the screw in FIG. 5 reaches a specified torque.

  Hereinafter, an embodiment of the technology disclosed in the present application will be described.

  An electronic device 10 according to this embodiment shown in FIG. 1 is an in-vehicle electronic device mounted on a vehicle as an example. Examples of such a vehicle-mounted electronic device include a digital tachograph, a network-type digital tachograph, a vehicle-mounted information system, a drive recorder, and a network-type vehicle-mounted station. Note that arrows FR, LH, and UP shown in the drawings respectively indicate the front-rear direction front side, the left-right direction left side, and the up-down direction upper side of the electronic device 10.

  The electronic device 10 includes a substantially rectangular parallelepiped casing 12. On the front surface 12A of the housing 12, a plurality of switches 14, 15 and a display 16 are provided. A recording medium holding structure 18 is provided on the left side of the front surface 12 </ b> A of the housing 12. As shown in FIG. 2, the recording medium holding structure 18 is for holding the recording medium 20, and includes a recess 22, a slot 24, a base member 26, and a door 28.

  The recess 22 is open to the front surface 12 </ b> A of the housing 12. The bottom surface 22 </ b> A of the recess 22 is offset to the rear side of the electronic device 10 with respect to the front surface 12 </ b> A of the housing 12. The slot 24 is open to the bottom surface 22 </ b> A of the recess 22. The slot 24 is formed in a rectangular shape extending in the vertical direction of the electronic device 10. A card type recording medium 20 is inserted into the slot 24. The recording medium 20 is, for example, an SD (Secure Digital) card.

  The base member 26 is disposed adjacent to the slot 24. The base member 26 is accommodated inside the recess 22. The base member 26 is a part of the housing 12. The door 28 is supported by the base member 26 so that it can be opened and closed. The door 28 has a size and shape that closes the opening of the recess 22. FIG. 2 shows a state where the door 28 is opened, and FIG. 3 shows a state where the door 28 is closed. The door 28 is fixed to the housing 12 in a closed state by being tightened by a screw 70 described later.

  As shown in FIG. 2 (see also FIGS. 3 to 5 as appropriate), the base member 26 includes a rectangular main body 32 having a longitudinal direction in the vertical direction of the electronic device 10 and both ends in the longitudinal direction of the main body 32. And a pair of support parts 34 formed on the part. The main body 32 is fixed to the bottom surface 22 </ b> A of the recess 22. The pair of support portions 34 extends from the main body portion 32 toward the front side of the electronic device 10. The support portion 34 is formed with the vertical direction of the electronic device 10 as the plate thickness direction. The support portion 34 is formed with a support hole 36 (see FIG. 5) penetrating in the thickness direction of the support portion 34.

  A cylindrical first boss 38 that protrudes toward the front side of the electronic device 10 is formed in the main body 32. The first boss 38 is formed with the longitudinal direction of the electronic device 10 as the axial direction. A nut 40 is provided inside the first boss 38. The nut 40 is, for example, an insert nut. The nut 40 is arranged concentrically with the first boss 38. The nut 40 is formed with a screw hole 42 penetrating in the axial direction of the nut 40.

  The first boss 38 has a top surface 38A. On the top surface 38 </ b> A of the first boss 38, a protrusion 44 having a rectangular shape as viewed from the side of the first boss 38 is formed. The protrusion 44 is a part of the first boss 38. The protruding portion 44 protrudes from the top surface 38 </ b> A of the first boss 38 toward the front side of the electronic device 10. The protrusion 44 is formed with the circumferential direction of the first boss 38 as a length direction, and is formed in a part of the circumferential direction of the first boss 38. The projecting portion 44 is formed along the circumferential direction of the first boss 38 and has an arc shape when viewed from the axial direction of the first boss 38. A first corner 46 is formed at one end of the protrusion 44 in the length direction. The first corner 46 will be described in detail later.

  The door 28 is formed in a substantially rectangular shape when viewed from the front, and is arranged with the vertical direction of the electronic device 10 as the longitudinal direction, like the main body portion 32 of the base member 26. Shaft portions 56 (see FIG. 5) extending in the vertical direction of the electronic device 10 are formed at both ends of the door 28 in the longitudinal direction. The shaft portion 56 is inserted into the support hole 36, whereby the door 28 is supported by the base member 26 so as to be opened and closed.

  The back surface 28A of the door 28 faces the bottom surface 22A of the recess 22 in a state where the door 28 is closed. A second boss 58 protruding from the back side of the door 28 is formed on the back surface 28A. The second boss 58 is arranged coaxially with the first boss 38 with the door 28 closed. The second boss 58 is formed with a through hole 62 into which a screw 70 described later is inserted. The through hole 62 penetrates in the axial direction of the second boss 58 (the thickness direction of the door 28).

  The second boss 58 has a top surface 58A and an outer peripheral surface 58B. Ribs 64 are formed on the outer peripheral surface 58 </ b> B of the second boss 58. The rib 64 is a part of the second boss 58. The rib 64 extends from the back surface 28 </ b> A of the door 28 along the axial direction of the second boss 58. When the back surface 28 </ b> A of the door 28 is used as a reference for the height, the height of the rib 64 is lower than the height of the second boss 58. A second corner portion 66 is formed at the end of the rib 64 in the height direction. The second corner portion 66 will be described in detail later.

  The screw 70 (see FIG. 5) has a shaft portion 72 and a head portion 74. For example, a right screw is used for the screw 70. The shaft portion 72 is inserted into the through hole 62 so as to penetrate the door 28 and is screwed into the screw hole 42 in a state where the door 28 is closed. The head 74 is formed with a larger diameter than the through hole 62.

  As an example, the screw 70 is rotated by a dedicated manual tool. The head 74 has a shape corresponding to a manual tool. When a manual tool is mounted on the head 74 and the shaft portion 72 of the screw 70 is screwed into the screw hole 42, the head 74 tightens the peripheral portion of the through hole 62, so that the door 28 is closed. It is fixed to the body 12 and the opening of the door 28 is restricted.

  Next, a more detailed structure of the electronic device 10 will be described together with a method of fixing the door 28 in a closed state with the screw 70.

  6 and 7 show a state before the tightening torque of the screw 70 reaches the specified torque. As shown in FIG. 6, the opening / closing axis L1 of the door 28 extends along the vertical direction of the electronic device 10 (see FIGS. 1 to 3), that is, the vertical direction. Opens and closes in the center. The center of the screw 70 and the screw hole 42, the first corner portion 46, and the second corner portion 66 are located closer to the opening / closing end 28B side of the door 28 than the opening / closing axis L1 of the door 28 when viewed from the front of the door 28. .

  Further, the first corner portion 46 and the second corner portion 66 are formed between the first boss 38 and the second boss 58, respectively, so that the first corner portion 46 and the second corner portion 66 are positioned between the main body portion 32 of the base member 26 and the door 28. That is, the first corner portion 46 and the second corner portion 66 are located closer to the main body portion 32 than the shaft portion 56 of the door 28.

  The rib 64 protrudes from the outer peripheral surface 58B of the second boss 58 in the horizontal direction. A central axis L2 (see FIG. 7) along the horizontal direction of the rib 64 is positioned above the central axis L3 of the screw 70 in the vertical direction when viewed from the side of the screw 70.

  More specifically, the first corner portion 46 has a first contact surface 46A perpendicular to the axial direction of the screw 70 and a first flank surface 46B extending along the axial direction of the screw 70. A first ridge line portion 46C is formed between the first contact surface 46A and the first flank surface 46B, and the first ridge line portion 46C is the central axis of the screw 70 when viewed from the side of the screw 70. Located on L3.

  More specifically, the second corner portion 66 has a second contact surface 66A perpendicular to the axial direction of the screw 70, and a second flank 66B extending along the axial direction of the screw 70. The second corner portion 66 is formed in the opposite direction to the first corner portion 46. That is, the first contact surface 46A of the first corner portion 46 is located on one side (arrow R1 side) in the circumferential direction of the screw 70 with respect to the first clearance surface 46B, whereas the second corner portion 66 66 A of 2nd contact surfaces are located in the other side (arrow R2 side) of the circumferential direction of the screw 70 with respect to the 2nd flank 66B. A second ridge line portion 66C is formed between the second contact surface 66A and the second flank surface 66B, and the second ridge line portion 66C is the central axis of the screw 70 when viewed from the side of the screw 70. It is in a position out of L3.

  As shown in FIG. 6, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second flank 66B is at the time of tightening the screw 70 with respect to the first flank 46B. It is located on the front side (arrow R1 side) in the rotation direction. That is, in this case, the second flank 66B is positioned below the first flank 46B in the vertical direction. Further, as shown in FIG. 7, in this state, the top surface 58 </ b> A of the second boss 58 contacts the top surface 38 </ b> A of the first boss 38, and the second contact surface 66 </ b> A is first in the axial direction of the screw 70. It contacts the contact surface 46A.

  8 and 9 show a state in which the screw 70 is further screwed into the screw hole 42 and the tightening torque of the screw 70 reaches the specified torque as compared with FIGS. 6 and 7. As shown in FIGS. 8 and 9, when the tightening torque of the screw 70 reaches the specified torque, the top surface 58 </ b> A of the second boss 58 is in contact with the top surface 38 </ b> A of the first boss 38. The boss 38 and the second boss 58 are compressed and deformed in the axial direction of the screw 70. At this time, the protrusion 44 and the rib 64 are elastically deformed in the circumferential direction of the screw 70, respectively. Thereby, the second corner portion 66 gets over the first corner portion 46.

  At this time, more specifically, the second contact surface 66A gets over the first contact surface 46A, and the second flank 66B contacts the first flank 46B. As described above, when the second corner portion 66 gets over the first corner portion 46, a click feeling is generated, so that the tightening torque of the screw 70 reaches the specified torque to the user who tightens the screw 70. Be informed.

  The above-mentioned specified torque is set to a maximum torque that is allowed in a range in which the door 28 does not rattle or damage parts.

  Next, the operation and effect of this embodiment will be described.

  As described above in detail, in the electronic device 10 according to this embodiment, the first boss 38 formed on the base member 26 of the housing 12 has the first corner 46 formed on the door 28. The second boss 58 is formed with a second corner portion 66. As shown in FIGS. 6 and 7, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second corner portion 66 extends in the axial direction of the screw 70. Abut.

  As shown in FIGS. 8 and 9, when the screw 70 is further screwed into the screw hole 42 and the tightening torque of the screw 70 reaches the specified torque, the second corner portion 66 becomes the first corner. Overcoming the portion 46, a click feeling is generated at this time. Therefore, the occurrence of this click feeling can notify the user who tightens the screw 70 that the tightening torque of the screw 70 has reached the specified torque. Thereby, since it is easy to understand that the tightening torque of the screw 70 has reached the specified torque, it is possible to suppress damage to the parts due to excessive tightening of the screw 70.

  In the electronic device 10 according to the present embodiment, as shown in FIG. 6, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second flank 66B is the first flank. It is located on the front side (arrow R1 side) in the rotational direction when the screw 70 is tightened with respect to 46B. Therefore, even when the door 28 is rotated together with the screw 70 when the screw 70 is tightened, as shown in FIG. 7, the second flank 66B is in front of the first flank 46B in the rotational direction of the screw 70 (see FIG. It is maintained in the state positioned on the arrow R1 side). Accordingly, as shown in FIG. 7, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second contact surface 66A is brought into contact with the first contact surface 46A accurately. be able to.

  Further, in the electronic device 10 according to the present embodiment, the first ridge line portion 46C is formed between the first contact surface 46A and the first flank surface 46B. Is located on the central axis L3 of the screw 70 as viewed from the side. Therefore, as shown in FIGS. 8 and 9, when the screw 70 is further screwed into the screw hole 42, it is possible to suppress the displacement of the position of the first ridge line portion 46 </ b> C. When 66 passes over the first corner portion 46, a good click feeling can be generated.

  In the electronic device 10 according to the present embodiment, as shown in FIGS. 6 and 7, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second contact surface 66 </ b> A is formed. It abuts on the first abutment surface 46 </ b> A in the axial direction of the screw 70. At this time, the top surface 38A of the first boss 38 contacts the top surface 58A of the second boss 58. Therefore, even if the screw 70 is further screwed into the screw hole 42 from this state, the top surface 38A of the first boss 38 abuts on the top surface 58A of the second boss 58, thereby suppressing the bending of the door 28. Can do.

  Further, in the electronic device 10 according to the present embodiment, the base member 26 provided in the housing 12 is formed with the first boss 38 provided with the nut 40 having the screw hole 42, and the door 28 has the screw 70. The 2nd boss | hub 58 in which the through-hole 62 in which is inserted is formed is formed. The first corner 46 is formed on the first boss 38, and the second corner 66 is formed on the second boss 58. That is, the first corner portion 46 and the second corner portion 66 are formed on the first boss 38 and the second boss 58, which have high rigidity and are coaxial with the screw 70 and the screw hole 42, respectively. Therefore, when the second corner portion 66 gets over the first corner portion 46, a strong repulsive force can be generated between the first corner portion 46 and the second corner portion 66, so that even better clicks can be made. A feeling can be generated.

  In addition, a protrusion 44 is formed on the top surface 38A of the first boss 38, and a rib 64 extending along the axial direction of the second boss 58 is formed on the outer peripheral surface 58B of the second boss 58. More specifically, the first corner portion 46 is formed on the protrusion 44, and the second corner portion 66 is formed on the rib 64. Therefore, when the second corner portion 66 gets over the first corner portion 46, it is accompanied by local elastic deformation of the protruding portion 44 and the rib 64 formed on the first boss 38 and the second boss 58 having high rigidity, respectively. Therefore, even by this, it is possible to generate a better click feeling.

  Next, a modification of this embodiment will be described.

  In the above embodiment, the door 28 and the base member 26 are used as an example for opening and closing the slot 24 of the SD card, but may be used for other purposes.

  In the above embodiment, the recording medium 20 is an SD card as an example, but may be other than an SD card.

  Moreover, in the said embodiment, although the electronic device 10 is a vehicle-mounted electronic device mounted in a vehicle as an example, other than a vehicle-mounted electronic device may be sufficient.

  In the above embodiment, the second flank 66B is preferably tightened with respect to the first flank 46B when the door 28 is closed and the screw 70 is screwed into the screw hole 42. It is located on the front side (arrow R1 side) in the direction of rotation. However, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second flank 66 </ b> B is rearward in the rotational direction when the screw 70 is tightened with respect to the first flank 46 </ b> B ( It may be located on the arrow R2 side).

  In the above embodiment, the first ridge line portion 46C between the first contact surface 46A and the first flank surface 46B is preferably located on the central axis L3 of the screw 70 when viewed from the side of the screw 70. To do. However, the first ridge line portion 46C between the first abutment surface 46A and the first flank surface 46B may be located away from the central axis L3 of the screw 70 when viewed from the side of the screw 70.

  In the above embodiment, the first corner 46 is preferably formed on the first boss 38, and the second corner 66 is formed on the second boss 58. However, the first corner portion 46 may be formed in a portion other than the first boss 38 in the base member 26, and the second corner portion 66 may be formed in a portion other than the second boss 58 in the door 28.

  In the above-described embodiment, preferably, a protrusion 44 is formed on the top surface 38A of the first boss 38, and the outer peripheral surface 58B of the second boss 58 extends along the axial direction of the second boss 58. Ribs 64 are formed. The first corner 46 is formed on the protrusion 44, and the second corner 66 is formed on the rib 64. However, the first corner 46 may be formed in a portion other than the projection 44 in the first boss 38, and the second corner 66 may be formed in a portion other than the rib 64 in the second boss 58.

  In the above embodiment, the opening / closing axis L1 of the door 28 extends along the vertical direction, and the door 28 is opened / closed in the horizontal direction. However, the opening / closing axis L1 of the door 28 extends along the horizontal direction, and the door 28 may be opened and closed in the vertical direction.

  In the above embodiment, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the top surface 58A of the second boss 58 is in contact with the top surface 38A of the first boss 38. The second contact surface 66A contacts the first contact surface 46A in the axial direction of the screw 70. However, when the door 28 is closed and the screw 70 is screwed into the screw hole 42, the second abutting surface with the top surface 58A of the second boss 58 separated from the top surface 38A of the first boss 38. 66A may contact the first contact surface 46A in the axial direction of the screw 70. Then, when the tightening torque of the screw 70 reaches the prescribed torque, the second corner portion 66 may get over the first corner portion 46. In this case, the top surface 58 </ b> A of the second boss 58 may come into contact with the top surface 38 </ b> A of the first boss 38 after the second corner portion 66 gets over the first corner portion 46.

  Moreover, the modification which can be combined among said several modifications may be combined suitably.

  As mentioned above, although one embodiment of the technique disclosed in the present application has been described, the technique disclosed in the present application is not limited to the above, and various modifications may be made without departing from the spirit of the present invention. Of course, it is possible.

  In addition, the following additional remark is disclosed regarding one Embodiment of the technique which the above-mentioned this application discloses.

(Appendix 1)
A housing,
A screw hole provided in the housing;
A door supported to be openable and closable by the housing;
A screw screwed into the screw hole and fixing the door closed;
A first corner provided in the housing;
The door is closed, the door is closed and the screw is screwed into the screw hole, and abuts the first corner in the axial direction of the screw, and the screw is further screwed into the screw hole. And when the tightening torque of the screw reaches a specified torque, a second corner overcoming the first corner,
An electronic device comprising:
(Appendix 2)
The first corner is
A first contact surface perpendicular to the axial direction of the screw;
A first flank extending along the axial direction of the screw;
Having
The electronic device according to appendix 1.
(Appendix 3)
The second corner is
A second contact surface perpendicular to the axial direction of the screw;
A second flank extending along the axial direction of the screw;
Having
The electronic device according to attachment 2.
(Appendix 4)
In a state where the door is closed and the screw is screwed into the screw hole, the second contact surface is in contact with the first contact surface in the axial direction of the screw, and the screw is in the screw hole. When the screw is further screwed in and the tightening torque of the screw reaches the specified torque, the second contact surface gets over the first contact surface and the second flank surface contacts the first flank surface. Touching,
The electronic device according to attachment 3.
(Appendix 5)
The second flank is positioned on the front side in the rotational direction when the screw is tightened with respect to the first flank when the door is closed and the screw is screwed into the screw hole.
The electronic device according to appendix 3 or appendix 4.
(Appendix 6)
The first ridge line portion between the first contact surface and the first flank is located on the central axis of the screw as viewed from the side of the screw.
The electronic device according to any one of appendix 3 to appendix 5.
(Appendix 7)
The second ridge line portion between the second contact surface and the second flank surface is at a position deviated from the central axis of the screw as viewed from the side of the screw.
The electronic device according to attachment 6.
(Appendix 8)
The housing has a first boss provided with the screw hole,
The door has a second boss formed with a through hole into which the screw is inserted,
The first corner is formed on the first boss,
The second corner is formed on the second boss,
The electronic device according to any one of appendix 3 to appendix 7.
(Appendix 9)
A protrusion is formed on the top surface of the first boss,
Ribs extending along the axial direction of the second boss are formed on the outer peripheral surface of the second boss,
The first corner is formed on the protrusion,
The second corner is formed on the rib,
The electronic device according to appendix 8.
(Appendix 10)
In a state where the door is closed and the screw is screwed into the screw hole, the second contact surface contacts the first contact surface in the axial direction of the screw, and the top of the first boss. The surface comes into contact with the top surface of the second boss,
The electronic device according to appendix 9.
(Appendix 11)
The opening / closing axis of the door extends along the vertical direction,
The rib protrudes horizontally from the outer peripheral surface of the second boss,
The electronic device according to appendix 10.
(Appendix 12)
The central axis along the horizontal direction of the rib is located above the central axis of the screw in the vertical direction as viewed from the side of the screw.
The electronic device according to attachment 11.
(Appendix 13)
The second flank is positioned below the first flank in the vertical direction when the door is closed and the screw is screwed into the screw hole.
The electronic device according to attachment 12.
(Appendix 14)
The center of the screw and the screw hole, the first corner, and the second corner are positioned closer to the opening / closing end of the door than the opening / closing axis of the door as viewed from the front of the door.
14. The electronic device according to any one of appendix 1 to appendix 13.

DESCRIPTION OF SYMBOLS 10 Electronic device 12 Case 26 Base member 28 Door 38 1st boss | hub 38A Top surface 40 Nut 42 Screw hole 44 Projection part 46 First corner | angular part 46A 1st contact surface 46B 1st flank face 46C 1st ridgeline part 58 2nd Boss 58A Top surface 58B Outer peripheral surface 62 Through hole 64 Rib 66 Second corner portion 66A Second contact surface 66B Second flank 66C Second ridge line portion 70 Screw L1 Door opening / closing axis L2 Rib center axis L3 Screw center axis

Claims (5)

A housing,
A screw hole provided in the housing;
A door supported to be openable and closable by the housing;
A screw screwed into the screw hole and fixing the door closed;
A first corner provided in the housing;
The door is closed, the door is closed and the screw is screwed into the screw hole, and abuts the first corner in the axial direction of the screw, and the screw is further screwed into the screw hole. And when the tightening torque of the screw reaches a specified torque, a second corner overcoming the first corner,
An electronic device comprising: The first corner is
A first contact surface perpendicular to the axial direction of the screw;
A first flank extending along the axial direction of the screw;
Have
The second corner is
A second contact surface perpendicular to the axial direction of the screw;
A second flank extending along the axial direction of the screw;
Have
The second flank is positioned on the front side in the rotational direction when the screw is tightened with respect to the first flank when the door is closed and the screw is screwed into the screw hole.
The electronic device according to claim 1. A first ridge line portion between the first contact surface and the first flank surface is located on a central axis of the screw as viewed from a side of the screw;
The electronic device according to claim 2. The housing has a first boss provided with the screw hole,
The door has a second boss formed with a through hole into which the screw is inserted,
The first corner is formed on the first boss,
The second corner is formed on the second boss,
The electronic device as described in any one of Claims 1-3. A protrusion is formed on the top surface of the first boss,
Ribs extending along the axial direction of the second boss are formed on the outer peripheral surface of the second boss,
The first corner is formed on the protrusion,
The second corner is formed on the rib,
The electronic device according to claim 4.