Lid member and electronic apparatus

Abstract

To improve the operability in association with cancelling engagement of a housing and a lid member.SOLUTION: A lid member 20 of a scientific electronic calculator 1 is a lid member 20 which can open or close an opening part 11 of a housing 10 and includes a hook 22 which engages the housing 10 and the lid member 20 with each other. The hook 22 has a finger placing part 222a operated in a direction to loosen the engagement of the housing 10 and the lid member 20 when the opening part 11 is opened. The finger placing part 222a has a bending shape recessed in a direction to loosen the engagement of the housing 10 and the lid member 20.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lid member and an electronic device.

Background Art

[0002] Conventionally, a lid mechanism for locking a case and its lid with a hook mechanism has been disclosed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the lid mechanism disclosed in Patent Document 1 above, since the groove for putting a finger when releasing the locking between the case and its lid is shallow and narrow, there is a problem that it is difficult to perform the operation related to releasing this locking.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to improve the operability related to releasing the engagement between a housing and a lid member.

Means for Solving the Problems

[0006] In order to solve the above problems, the lid member according to the present invention is a lid member capable of opening and closing an opening of a housing, comprising a hook for engaging the housing and the lid member, the hook having a finger-putting portion that is operated in a direction to loosen the engagement when opening the opening, the finger-putting portion having a curved shape that is recessed in the loosening direction, characterized in that.

Effects of the Invention

[0007] According to the present invention, the operability related to the release of the engagement between the housing and the lid member can be improved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the lid member and the electronic device according to the present invention will be described with reference to the drawings. Note that a scientific calculator is taken as an example of an embodiment of the electronic device to which the present invention is applied, but the electronic device is not limited to a scientific calculator, and any electronic device (for example, an electronic dictionary, a tablet terminal, etc.) provided with a lid member 20 that closes the opening 11 of the housing 10 described later can be applied.

[0010] As shown in FIGS. 1 and 2, the scientific calculator 1 includes a housing 10 and a lid member (lid body) 20. The housing 10 is provided with an opening 11 that opens at the back and houses (loads) four dry batteries (not shown) or a dry battery type secondary battery (not shown) (see FIGS. 5 and 8).

[0011] The opening 11 is formed in a circular shape corresponding to the outer shape (circular shape) of the lid member 20 (see FIG. 3), and is covered by attaching the lid member 20.

[0012] As shown in FIGS. 1 and 5, at a predetermined position of the opening 11 (a position corresponding to a hook 22 (described later) of the lid member 20), an engaged portion (engaged region) 12 for engaging the hook 22 when the lid member 20 is attached is provided.

[0013] The engaged portion 12 is formed in a eaves shape that projects while inclining downward from the peripheral edge of the opening 11 toward the center of the opening 11. As shown in FIG. 7, the engaged portion 12 has an engaged surface 121 that engages with an engaging surface 222c1 of each rib 222c (described later) provided on the hook 22. Further, the engaged portion 12 has an inclined surface (first surface) 122 adjacent to the engaged surface 121. This inclined surface 122 faces an inclined surface (second surface) 222c2 of each rib 222c and is formed to be separated from the inclined surface 222c2 by a predetermined distance when the engaging surface 222c1 of each rib 222c engages with the engaged surface 121, that is, when the lid member 20 is attached to the housing 10. This predetermined distance is set to a distance that can prevent rattling caused by an impact being applied to the lid member 20 or the housing 10. Thereby, when an impact is applied to the lid member 20 or the housing 10, rattling caused by the applied impact can be preferably prevented.

[0014] Also, at a predetermined position of the opening 11 (a position corresponding to a locking piece 23 (described later) of the lid member 20), a locking hole (not shown) for locking (inserting) the locking piece 23 when the lid member 20 is attached is provided.

[0015] As shown in FIG. 3, the lid member 20 includes a lid main body portion 21, a hook (elastic member) 22, and a locking piece 23.

[0016] The lid main body portion 21 is a portion that closes the opening 11 of the housing 10, and is formed in a circular shape (disc shape) corresponding to the opening 11 having a circular frontage. The lid main body portion 21 has a portion corresponding to the engaged portion 12 provided on the housing 10 cut out, and a hook 22 is provided at the innermost end portion 21a of the portion.

[0017] The hook 22 is a hook that engages the housing 10 and the lid member 20. Specifically, as shown in FIGS. 3 and 6(a), the hook 22 includes a base portion (second region) 221 protruding from the back surface side of the above-described end portion 21a of the lid main body portion 21, an operation portion (first region) 222 disposed opposite to the base portion 221, and a connecting portion 223 that connects the base portion 221 and the operation portion 222 to each other, and is a leaf spring-shaped hook. Here, when the lid member 20 is attached to the housing 10, the hook 22 is in a state of being biased toward the engaged portion 12. Note that the hook 22 only needs to be biased toward the engaged portion 12 when the lid member 20 is attached to the housing 10, and is not limited to a leaf spring shape, and may be a hook using other biasing means such as a coil spring or rubber.

[0018] The operation portion 222 is provided with a finger placing portion (finger placing region) 222a that is operated in a direction (the direction from top to bottom in FIG. 1) for loosening the engagement between the housing 10 and the lid member 20 when removing the lid member 20 from the housing 10.

[0019] The hooking portion 222a is formed in a hook shape at the free end side opposite to the one end side connected to the connecting portion 223 of the operation portion 222. As shown in FIG. 3, the hooking portion 222a is formed in a curved shape recessed in the direction of loosening the engagement between the housing 10 and the lid member 20 (the direction from top to bottom in FIG. 1). That is, the hooking portion 222a is formed in a shape recessed in the direction opposite to the arc-shaped recess at the location corresponding to the hooking portion 222a of the opening portion 11 (the location where the engaged portion 12 is provided). Further, the hooking portion 222a is formed so as not to protrude from the outer surface of the housing 10, that is, not to bulge, when the lid member 20 is attached to the housing 10. Further, as shown in FIG. 6(a), the hooking portion 222a has a corner C1 bent in a hook shape formed in an R shape (as if the corner is rounded).

[0020] Further, an engaging portion (engaging region) 222b is provided between the one end side connected to the connecting portion 223 and the other end side provided with the hooking portion 222a of the operation portion 222. The engaging portion 222b is a portion that engages with the engaged portion 12 provided on the housing 10. As shown in FIGS. 5 and 6(a), the upper surface of the engaging portion 222b is formed to slope downward toward the engaged portion 12. Further, ribs 222c, 222c are provided on the upper surface of the engaging portion 222b.

[0021] As shown in FIG. 4, two ribs 222c are provided at a predetermined interval in the width direction of the engaging portion 222b. As shown in FIGS. 4 and 7, each rib 222c has an engaging surface 222c1 and an inclined surface 222c2 adjacent to the lower end of the engaging surface 222c1.

[0022] The engaging surface 222c1 is a surface that engages with the engaging surface 121 of the engaged portion 12 provided on the housing 10 as shown in FIG. 7. When the engaging surface 222c1 is engaged with the engaging surface 121, that is, when the lid member 20 is attached to the housing 10, the operation portion 222 is in a state of being pushed toward the base portion 221 by the engaged portion 12. That is, when the lid member 20 is attached to the housing 10, the operation portion 222 (hook 22) is in a state of being biased toward the engaged portion 12. Here, when the engaging surface 222c1 of the rib 222c is engaged with the engaging surface 121 of the engaged portion 12, it prevents rattling and functions as a positioning rib in the height direction (the thickness direction of the housing 10) of the lid member 20.

[0023] As shown in FIG. 7, the inclined surface 222c2 slopes downward toward the engaged portion 12. The inclined surface 222c2 faces the inclined surface 122 of the engaged portion 12 and is formed so as to be separated from the inclined surface 122 by a predetermined distance when the engaging surface 222c1 is engaged with the engaging surface 121, that is, when the lid member 20 is attached to the housing 10.

[0024] The connecting portion 223 is a portion that connects the base portion 221 and the operating portion 222 to each other as described above. The connecting portion 223 forms a U shape in a side view as shown in Fig. 6(a). Therefore, the operating portion 222 including the engaging portion 222b described above is rotatable in a direction away from the engaged portion 12 (a direction approaching the base portion 221) or a direction approaching the engaged portion 12 (a direction away from the base portion 221) with the center of the lowermost end position of the connecting portion 223 (the width direction of the connecting portion 223 as the axis). In the present embodiment, the hook 22 is formed in a curved shape that is recessed in a direction to loosen the engagement between the housing 10 and the lid member 20 for any of the base portion 221, the operating portion 222, the engaging portion 222b, and the connecting portion 223 in correspondence with the curved shape of the finger placing portion 222a (see Fig. 3). For this reason, when moving the finger placing portion 222a in a direction to loosen the engagement between the housing 10 and the lid member 20 when removing the lid member 20 from the housing 10, stress is likely to concentrate on both ends in the width direction of the connecting portion 223. Therefore, as shown in Fig. 4, chamfered portions 223a are provided at both ends in the width direction of the connecting portion 223, that is, chamfering is performed at both ends. Thereby, the concentration of stress applied to both ends in the width direction of the connecting portion 223 is reduced.

[0025] The base portion 221 protrudes from the back side of the innermost end portion 21a of the lid main body portion 21 as described above. As shown in FIGS. 5 and 6(a), the base portion 221 is provided with a chamfered portion 221a at an L-shaped corner portion C2 formed by the base portion 221 and the lid main body portion 21. This chamfered portion 221a is provided at an angle (relief angle) corresponding to the inclination angle of the operation portion 222 when the corner portion C1 of the finger hook portion 222a abuts at a position where the finger hook portion 222a abuts when the finger hook portion 222a is operated in a direction to loosen the engagement between the housing 10 and the lid member 20. In other words, in a region (corner portion C2) facing the corner portion C1 of the finger hook portion 222a (operation portion 222) of the base portion 221, as a result of moving the finger hook portion 222a in a direction in which the operation portion 222 and the base portion 221 approach each other, a shape (relief shape; chamfered portion 221a) having an angle when the operation portion 222 and the base portion 221 come into contact (abut) is formed as a relief angle. FIG. 6(b) shows a state in which the finger hook portion 222a is moved in a direction in which the operation portion 222 and the base portion 221 approach each other from FIG. 6(a), and the chamfered portion 221a corresponds to the position and angle (tilt angle) at which the operation portion 221 abuts. In the present embodiment, since the corner portion C1 of the finger hook portion 222a is formed in an R shape and the base portion 221 is provided with the chamfered portion 221a, the stroke amount (movement amount) of the finger hook portion 222a can be increased even when it is difficult to secure a moving distance. As a result, when the finger hook portion 222a is operated in a direction to loosen the engagement between the housing 10 and the lid member 20, the engagement can be surely released. Note that the R shape may be formed at the corner portion C2, and in that case, the chamfered portion 221a may be provided on the operation portion 222 side.

[0026] The locking piece 23 engages with a locking hole (not shown) provided in the opening 11 by being inserted therein. The locking pieces 23 are provided at two locations on the peripheral edge of the lid main body portion 21. Specifically, the locking pieces 23, 23 are provided at the respective vertex positions of an isosceles triangle having the above-described hook 22 as a vertex and are provided on the peripheral edge of the lid main body portion 21.

[0027] The lid member 20 is configured to be supported by the above-described hooks 22 and the two locking pieces 23, 23. The hooks 22 and the locking pieces 23, 23 are both integrally formed with the lid main body 21.

[0028] In the above-described structure, a dry battery or a dry battery type secondary battery is stored at a predetermined position of the opening 11. The locking pieces 23, 23 of the lid member 20 are inserted into locking holes (not shown) of the opening 11. In the state shown in FIG. 8, when the lid member 20 is pressed from above, the lid main body 21 of the lid member 20 fits into the opening 11, the hook 22 of the lid member 20 bends inward and engages with the engaged portion 12, and the lid member 20 is fixed to the housing 10 (see FIG. 5). On the other hand, in this state, when the finger-touching portion 222a of the hook 22 is operated in the direction of loosening the engagement between the housing 10 and the lid member 20 (toward the base portion 221), the engagement between the hook 22 and the engaged portion 12 is released, and the opening 11 is opened (see FIG. 8). At this time, since the inclined surfaces 222c2 are provided on the respective ribs 222c (see FIG. 7), the corner formed by the engaged surface 121 of the engaged portion 12 and the inclined surface 122 does not interfere (contact) with the engaging portion 222b (hook 22). Therefore, the operation of releasing the engagement between the housing 10 and the lid member 20 can be performed smoothly.

[0029] As described above, the lid member 20 of the scientific calculator 1 according to the present embodiment is a lid member 20 capable of opening and closing the opening 11 of the housing 10, and includes a hook 22 that engages the housing 10 and the lid member 20. The hook 22 has a finger-touching portion 222a that is operated in the direction of loosening the engagement between the housing 10 and the lid member 20 when the opening 11 is opened. The finger-touching portion 222a has a curved shape that is recessed in the direction of loosening the engagement between the housing 10 and the lid member 20. Therefore, according to the scientific calculator 1, since the finger-touching portion 222a of the lid member 20 has a curved shape that is recessed in the direction of loosening the engagement between the housing 10 and the lid member 20, it is easy to place a finger on the finger-touching portion 222a. As a result, the operability related to releasing the engagement between the housing 10 and the lid member 20 can be improved.

[0030] Further, in the calculator 1 of the present embodiment, the lid member 20 has a hook 22 including a base portion 221 protruding from the back surface side of the lid member 20, an operation portion 222 provided with an engagement portion 222b facing the base portion 221 and engaging with the finger placement portion 222a and the engaged portion 12 of the housing 10, and a connecting portion 223 connecting the base portion 221 and the operation portion 222 to each other. Since the base portion 221, the engagement portion 222b, the operation portion 222, and the connecting portion 223 have a curved shape recessed in a direction to loosen the engagement between the housing 10 and the lid member 20 corresponding to the finger placement portion 222a, the lid member 20 can be easily molded.

[0031] Further, in the calculator 1 of the present embodiment, the hook 22 of the lid member 20 is a leaf spring-shaped hook, and chamfered portions 223a are provided at both ends in the width direction of the connecting portion 223. Therefore, according to the calculator 1, when removing the lid member 20 from the housing 10, the concentration of stress applied to both ends in the width direction of the connecting portion 223 can be reduced.

[0032] Further, in the calculator 1 of the present embodiment, since the lid member 20 has a structure in which the finger placement portion 222a does not protrude from the housing 10 when attached to the housing 10, it is possible to prevent the appearance on the back side of the calculator 1 from being deteriorated.

[0033] Further, in the calculator 1 of the present embodiment, the lid member 20 has a lid main body portion 21 having a shape corresponding to the circular opening 11, so that the design can be improved.

[0034] Further, the opening 11 of the calculator 1 of the present embodiment has an arc shape recessed at a location corresponding to the finger placement portion 222a, and the finger placement portion 222a has a curved shape recessed in a direction opposite to the recess of the arc shape. Therefore, it is possible to more easily place a finger on the finger placement portion 222a.

[0035] As described above, the present invention has been specifically described based on the embodiments. However, the present invention is not limited to the above embodiments and can be modified without departing from the gist thereof. For example, in the above embodiment, the opening 11 of the housing 10 is formed in a circular shape, but the shape of the opening 11 is not limited to a circular shape. The shape of the opening 11 may be, for example, a rectangle, an ellipse, or the like. When the shape of the opening 11 is a rectangle, the lid main body 21 has a shape corresponding to the opening 11 formed in the rectangle.

[0036] Further, in the above embodiment, the corner C1 of the pointing portion 222a is formed in an R shape and the chamfered portion 221a is provided on the base portion 221. However, for example, if the corner C1 of the pointing portion 222a is formed in an R shape, the chamfered portion 221a may not be provided on the base portion 221. Further, if the chamfered portion 221a is provided on the base portion 221, the corner C1 of the pointing portion 222a may not be formed in an R shape.

[0037] Further, in the above embodiment, the locking piece 23 of the lid member 20 is configured to lock into a locking hole (not shown) provided at a predetermined position of the opening 11. However, for example, the lid member 20 and the housing 10 may be coupled via a hinge that enables the opening and closing operation of the opening 11. In this case, the lid member 20 has a structure that does not completely come off from the housing 10.

[0038] Further, in the above embodiment, the shape of the curved surface of the inclined surface 222c2 may be made to coincide with the shape of the movement locus of the inclined surface 222c2 when the engaging portion 222b of the lid member 10 is rotated. By this, while preventing the lid member 20 from being removed from the housing 20 due to the lid member 20 moving upward when an impact is applied to the lid member 20 or the housing 10, the engagement between the housing 20 and the lid member 10 can be appropriately released.

[0039] Further, regarding the detailed configuration of each component of the scientific calculator 1 in the above embodiment, it goes without saying that it can be appropriately changed without departing from the gist of the present invention.

Description of Reference Numerals

[0040] 1 calculator, 10 housing, 11 opening, 12 engaged part, 121 engaged surface, 122 inclined surface, 20 lid member, 21 lid main body part, 22 hook, 221 base part, 221a chamfered part, 222 operation part, 222a finger placing part, 222b engaging part, 222c rib, 222c1 engaging surface, 222c2 inclined surface, 223 connecting part, 223a chamfered part, 23 locking piece

Claims

1. A lid member capable of opening and closing an opening of a housing, comprising a hook for engaging the housing and the lid member, wherein the hook has a finger-resting portion that is operated in a direction to loosen the engagement when opening the opening, and the finger-resting portion has a curved shape that is recessed in the loosening direction. The lid member is characterized by this.

2. The hook comprises a base portion protruding from the back surface side of the lid member, an operation portion provided opposite to the base portion and engaging with the finger-resting portion and an engaged portion of the housing, and a connecting portion connecting the base portion and the operation portion to each other, and the base portion, the engaging portion, the operation portion, and the connecting portion have a curved shape that is recessed in the loosening direction corresponding to the finger-resting portion. The lid member according to claim 1, characterized by this.

3. The hook is a leaf spring-shaped hook, and chamfered portions are provided at both ends in the width direction of the connecting portion. The lid member according to claim 2, characterized by this.

4. When the lid member is attached to the housing, the finger-resting portion does not protrude from the housing. The lid member according to claim 1, characterized by this.

5. It has a lid main body portion having a shape corresponding to the circular opening. The lid member according to claim 1, characterized by this.

6. The opening of the housing has an arcuate shape that is recessed at a location corresponding to the finger-resting portion, and the finger-resting portion has a curved shape that is recessed in a direction opposite to the recess of the arcuate shape. The lid member according to claim 1, characterized by this.

7. A lid member according to any one of claims 1 to 6, and the housing provided with the opening, and a battery is housed in the opening. An electronic device characterized by this.

Images