Electronic equipment with cover

Abstract

To properly facilitate removal of a cover component from electronic equipment.SOLUTION: The present invention is directed to electronic equipment with a cover having electronic equipment (scientific calculator 10) having engaging portions at both ends in the longitudinal direction and a cover component 20 having engagement portions 22 provided at both of the ends in the longitudinal direction so as to be engaged with the engaging portions in a first state having a gap between the cover component 20 and the electronic equipment. A shape of the electronic equipment and a position of the engaging portion and a shape of the cover component 20 and a position of the engagement position are determined so that a front surface fitting engagement amount as an amount of engagement of the engagement portion 22 and the engaging portion in a second state in which a center portion in the longitudinal direction of the cover component 20 is elastically deformed so as to be brought in contact with the electronic equipment in a state in which the cover component 20 is fitted to a front surface side of the electronic equipment should be substantially the same as a rear surface fitting engagement amount as an amount of engagement of the engagement portion 22 and the engaging portion in a second state in which a center portion in the longitudinal direction of the cover component 20 is elastically deformed so as to be brought in contact with the electronic equipment in a state in which the cover component 20 is fitted to a rear surface side of the electronic equipment.SELECTED DRAWING: Figure 9A

Description

Technical Field

[0001] The present invention relates to an electronic device with a cover.

Background Art

[0002] Conventionally, cover components for protecting electronic devices such as calculators have been known. For example, Patent Document 1 describes a cover component that can be attached to both the front side and the back side of an electronic device provided with a display unit and a key operation unit, and a cover component is fixed to the electronic device by engaging an engaging portion of the cover component with a locking groove of the electronic device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when removing the cover component of the invention of Patent Document 1 from the electronic device, generally, the user removes it by pressing down (or pulling) with a finger on the extension portion provided with the engaging portion of the cover component. At this time, by elastically deforming the cover component by pressing the central portion in the vertical direction of the cover component toward the electronic device side so that the engaging portion of the cover component moves outward, the ease of removal when removing the engaging portion of the cover component from the locking groove of the electronic device may change. Therefore, when the gap formed between the cover component attached to the electronic device and the electronic device is not an appropriate distance, there has been a problem that it is difficult to appropriately adjust the ease of removal when removing the cover component from the electronic device.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide an electronic device with a cover that can appropriately adjust the ease of removal when removing the cover component from the electronic device.

Means for Solving the Problems

[0006] To achieve the above object, an electronic device with a cover according to the present invention includes: an electronic device having locking portions on side surfaces at both longitudinal ends; and a cover component that can be selectively attached to both the front side and the back side of the electronic device, and has engaging portions provided at both longitudinal ends that engage with the locking portions in a first state where there is a gap between the cover component and the electronic device at the central portion in the longitudinal direction, regardless of whether the cover component is attached to the front side or the back side. The shape of the electronic device and the position of the locking portions, and the shape of the cover component and the position of the engaging portions are determined such that the amount of engagement between the engaging portion and the locking portion in a second state, in which the central portion in the longitudinal direction of the cover component is elastically deformed to contact the electronic device with the cover component attached to the front side of the electronic device, i.e., the front attachment engagement amount, is substantially the same as the amount of engagement between the engaging portion and the locking portion in the second state, in which the central portion in the longitudinal direction of the cover component is elastically deformed to contact the electronic device with the cover component attached to the back side of the electronic device, i.e., the back attachment engagement amount.

Advantages of the Invention

[0007] According to the present invention, the ease of removal when removing the cover component from the electronic device can be made appropriate.

Brief Description of the Drawings

[0008]

Figure 1A

Figure 1B

Figure 2A

Figure 2B

Figure 3

Figure 4A

Figure 4B

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8A

Figure 8B

Figure 9A

Figure 9B

Figure 9C

Figure 10A

Figure 10B

Figure 10C

Figure 11A

Figure 11B

Figure 12A

Figure 12B

Figure 12C

Embodiments for Carrying Out the Invention

[0009] An embodiment of the present invention will be described with reference to FIGS. 1 to 12C. Note that, although various technically preferable limitations are imposed on the embodiments described below for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0010] As shown in FIG. 1A, the electronic device 100 with a cover according to the present embodiment includes a scientific calculator 10 and a cover component 20. In the following description, the front-back, left-right, and up-down directions shall refer to the directions shown in each figure. That is, the front-back direction refers to the front-rear direction (thickness direction) of the scientific calculator 10 and the cover component 20, the left-right direction refers to the width direction of the scientific calculator 10 and the cover component 20, and the up-down direction refers to the longitudinal direction of the scientific calculator 10 and the cover component 20. Also, the cover component 20 can be attached to both the front side and the back side of the scientific calculator 10. However, in the following, unless otherwise specified, the configuration of the cover component 20 will be described assuming that it is in the front-rear orientation when attached to the back side of the scientific calculator 10 as shown in FIG. 1A.

[0011] As shown in FIGS. 1A and 2A, the scientific calculator 10 is an example of an electronic device according to the present invention and is formed in a rectangular plate shape that is long in the up-down direction. As shown in FIG. 3, the scientific calculator 10 includes a front case 11 that covers the front and a back case 15 that covers the back. The front case 11 and the back case 15 are engaged in the front-back direction to form the housing of the scientific calculator 10. The front case 11 and the back case 15 are fastened by, for example, a plurality of screws (not shown). On the front case 11, a display screen 12 for displaying various information and a plurality of operation buttons 13 for receiving user operations are arranged.

[0012] The cover part 20 covers and protects the main surface (front surface or rear surface) of the scientific calculator 10. As shown in FIGS. 1B and 2B, the cover part 20 is formed in a shape corresponding to the front view shape of the scientific calculator 10, that is, in a vertically long rectangular plate shape corresponding to the longitudinal direction of the scientific calculator 10, and is formed of, for example, ABS (Acrylonitrile Butadiene Styrene) resin. The periphery of the cover part 20 is curved forward so as to cover the periphery of the scientific calculator 10 when mounted.

[0013] At both the upper and lower ends of the cover part 20, extension parts 21 that are curved forward and extend more than the other peripheral parts are respectively provided. As shown in FIG. 3, the extension parts 21 cover at least a part of the side surfaces at both the upper and lower ends of the housing (rear case 15) of the scientific calculator 10. At the tip of each extension part 21, an engaging part 22 that protrudes toward the center side of the cover part 20 in the vertical direction is provided. As shown in FIGS. 4A to 5B, the engaging part 22 is formed so as to be engageable from both the front side and the rear side with locking grooves 15a (locking parts) formed on the side surfaces at both the upper and lower ends of the housing (rear case 15) of the scientific calculator 10. That is, the cover part 20 is configured to be individually attachable to the front side and the rear side of the scientific calculator 10 by reversing the front-rear direction. In the present embodiment, the engaging part 22 has a protrusion shape and the locking groove 15a (locking part) has a groove shape, but it is not limited to this. The engaging part may have a groove shape and the locking part may have a protrusion shape.

[0014] As shown in FIGS. 3 and 6, the cover component 20 can be selectively arranged on both the front side and the back side of the scientific calculator 10. A state where the engaging portion 22 is engaged with the locking groove 15a without being elastically deformed by pressing the cover component 20 is defined as the first state. As shown in FIGS. 4A to 5B, the engagement amount between the engaging portion 22 and the locking groove 15a in the first state is the first engagement amount H1, and it is substantially the same whether the cover component 20 is mounted on the front side or the back side of the scientific calculator 10, and the average value thereof is 1.0 mm (here, substantially the same means that the difference in the engagement amount with respect to the average value of the engagement amount is 40% or less (more preferably 20% or less)). As shown in FIGS. 6(a) and 7, at the central portion in the vertical direction and the central portion in the horizontal direction (the position where the width of the gap between the cover component 20 and the scientific calculator 10 is the narrowest) in the first state when the cover component 20 is mounted on the back side of the scientific calculator 10, a first gap A with a width W1 is formed between the cover component 20 and the back case 15. The width W1 of the first gap A is 0.1 mm or more and 1.2 mm or less, and more preferably 0.2 mm or more and 0.9 mm or less.

[0015] As shown in FIGS. 6(b), 8A, and 8B, in the first state when the cover component 20 is mounted on the front side of the scientific calculator 10, at the central portion in the vertical direction and both end portions in the horizontal direction (the position where the width of the gap between the cover component 20 and the scientific calculator 10 is the narrowest), a second gap B with a width W2 is formed between the cover component 20 and the back case 15. The width W2 of the second gap B is within the first range, specifically, 0.1 mm or more and 1.2 mm or less, and more preferably 0.2 mm or more and 0.9 mm or less. Also, in the present embodiment, the width W1 and the width W2 are substantially the same (here, substantially the same means that the difference between the width W1 and the width W2 is 0.9 mm or less (more preferably 0.5 mm or less), or the difference between the width W1 and the width W2 with respect to the average value of the width W1 and the width W2 is 80% or less (more preferably 50% or less)). Further, as shown in FIGS. 6(b), 8A, and 8B, the width W2 of the second gap B in the first state when the cover component 20 is mounted on the front side of the scientific calculator 10 is the closest distance between the peripheral portion of the housing (front case 11) of the scientific calculator 10 where the operation button 13 is not arranged and the cover component 20. Also, the closest distance W3 between the front surface of the operation button 13 in the non-pressed state and the cover component 20 is within the second range, specifically, larger than the width W2 and 2.5 mm or less. More preferably, it is 0.8 mm or more larger than the width W2 and 2.0 mm or less.

[0016] Next, an explanation will be given on how to determine the width of the gap between the cover component 20 and the scientific calculator 10. When the cover component 20 and the scientific calculator 10 are in contact with each other at a portion other than the upper and lower end portions where the locking groove 15a or the engaging portion 22 is provided in the state where the cover component 20 is mounted on the front side or the back side of the scientific calculator 10, the surface of the scientific calculator 10 may be damaged over time. Therefore, a gap is provided between the cover component 20 and the scientific calculator 10. The width of the gap required in this case is 0.1 mm or more, and preferably 0.2 mm or more when considering design tolerances.

[0017] When a user uses the electronic device 100 with a cover, generally when removing the cover component 20 from the calculator 10, the user presses (or pulls) down with a finger on the extension portion 21 where the engaging portion 22 of the cover component 20 is provided. At this time, the user may press the cover component 20 toward the calculator 10 at the central portion in the vertical direction. Since there is a gap between the cover component 20 and the calculator 10 as described above, the cover component 20 elastically deforms in response to the pressing, and accordingly, the engaging portion 22 of the cover component 20 moves outward. In this case, due to the shallower fitting between the locking groove 15a and the engaging portion 22, the force required to push down (pull) the extension portion 21 with a finger to remove the engaging portion 22 from the locking groove 15a is reduced (the cover component is easier to remove).

[0018] As shown in FIGS. 9A to 12C, from the first state, the state in which the cover component 20 is pressed toward the calculator 10 at the central portion in the vertical direction and elastically deformed is defined as the second state. As shown in FIGS. 9B, 9C, 10B, and 10C, the engagement amount between the engaging portion 22 and the locking groove 15a in the second state is the second engagement amount H2, which is less than the first engagement amount H1. The engagement amount is substantially the same whether the cover component 20 is mounted on the front side or the back side of the calculator 10, and the average value thereof is 0.93 mm (here, substantially the same means that the difference in the engagement amount with respect to the average value of the engagement amount is 40% or less, more preferably 20% or less). That is, the second engagement amount H2 is the front mounting engagement amount, which is the engagement amount between the engaging portion 22 and the locking groove 15a in the second state in which the central portion in the longitudinal direction of the cover component 20 is elastically deformed so as to contact the calculator 10 in the state where the cover component 20 is mounted on the front side of the calculator 10, and the back mounting engagement amount, which is the engagement amount between the engaging portion 22 and the locking groove 15a in the second state in which the central portion in the longitudinal direction of the cover component 20 is elastically deformed so as to contact the calculator 10 in the state where the cover component 20 is mounted on the back side of the calculator 10. Further, the shape of the calculator 10 and the position of the locking groove 15a, and the shape of the cover component 20 and the position of the engaging portion 22 are set so that the front mounting engagement amount and the back mounting engagement amount are substantially the same.

[0019] However, if the second engagement amount H2 in the second state is smaller than expected, the engagement force will not be stable, and when the cover component 20 is pressed toward the scientific calculator 10, the cover component 20 may become too easy to come off. In this case, for example, just by accidentally pressing the cover component 20 toward the scientific calculator 10 during carrying, the cover component 20 may come off from the scientific calculator 10, which is not desirable. Therefore, the ratio of the second engagement amount H2 to the first engagement amount H1 is set to be in the range of 30% or more and 95% or less, and the width W1 of the first gap A or the width W2 of the second gap B is set to 1.2 mm or less. When emphasizing the stability of the attachment of the cover component 20 to the scientific calculator 10 rather than the ease of removal of the cover component 20, the ratio of the second engagement amount H2 to the first engagement amount H1 may be set to 50% or more, or the width W1 of the first gap A and the width W2 of the second gap B may be set to 0.9 mm or less. Also, when emphasizing making it easy to remove the cover component 20 by taking advantage of the gap between the cover component 20 and the scientific calculator 10, if the width W1 of the first gap A or the width W2 of the second gap B is small, the amount of deflection when the cover component 20 is pressed toward the scientific calculator 10 and elastically deformed is not sufficient, and the degree of ease of removing the cover component 20 is small. Therefore, the ratio of the second engagement amount H2 to the first engagement amount H1 may be set to 80% or less, or the width W1 of the first gap A or the width W2 of the second gap B may be set to 0.2 mm or more.

[0020] Also, if the difference between the width W1 of the first gap A and the width W2 of the second gap B is large, the ease of removing the cover component 20 will be significantly different when the cover component 20 is attached to the back side of the scientific calculator 10 and when it is attached to the front side of the scientific calculator 10. Therefore, it is preferable to make the width W1 of the first gap A and the width W2 of the second gap B substantially the same (here, substantially the same means that it is equal to or less than a predetermined value. For example, the difference between the width W1 and the width W2 is 0.9 mm or less, and more preferably 0.5 mm or less), or to make the second engagement amount H2 substantially the same when the cover component 20 is attached to the front side of the scientific calculator 10 and when it is attached to the back side, so that the ease of removing the cover component 20 is not significantly different when the cover component 20 is attached to the front side of the scientific calculator 10 and when it is attached to the back side (here, substantially the same means that the difference in the engagement amount with respect to the average value of the engagement amount is 40% or less, and more preferably 20% or less).

[0021] Also, considering the storage performance and design of the electronic device 100 with a cover, if the width W1 of the first gap A or the width W2 of the second gap B is greater than 1.2 mm, the front-rear width (thickness) of the electronic device 100 with a cover in which the cover component 20 is attached to the scientific calculator 10 will increase, deteriorating the storage performance and design of the electronic device 100 with a cover. Also, in this case, there may be problems such as the amount of deflection becoming too large when the cover component 20 is pressed against the scientific calculator 10 side and elastically deformed, causing the user to feel discomfort, which is not preferable. That is, by setting the width W1 of the first gap A and the width W2 of the second gap B to 0.1 mm or more (preferably 0.2 mm or more) and 1.2 mm or less (preferably 0.9 mm or less) as described above, the cover component 20 can be attached to the scientific calculator 10 in a stable state, and the ease of removing the cover component 20 can be improved. In other words, the width W1 of the first gap A and / or the width W2 of the second gap B are mainly set according to the conditions regarding the stability of attachment and the ease of removal of the cover component 20 attached to the electronic device (scientific calculator 10).

[0022] In conventional cover components and scientific calculators, when the cover component is attached to the back side of the scientific calculator, the width of the gap formed between the cover component and the scientific calculator is smaller than the width W1 of the first gap A of the present embodiment. Therefore, when the cover component is pressed against the scientific calculator side and elastically deformed, the amount of deflection is not sufficient, and there is a problem that it is difficult to remove the cover component. To address the above problem, the width of the first gap A of the present embodiment is set to a value that makes it easy to remove the cover component 20 when the cover component 20 is attached to the back side of the scientific calculator 10 as described above. Moreover, the width of the first gap A of the present embodiment is set to a value that allows the cover component 20 to be attached to the scientific calculator 10 in a stable state as described above.

[0023] Also, in conventional cover components and scientific calculators, when removing the cover component attached to the front side of the scientific calculator, if the cover component is pressed against the scientific calculator side at the central portion in the vertical direction, the cover component may come into contact with the operation buttons provided on the front surface of the scientific calculator. In this case, if the cover component is further pressed against the scientific calculator side while the cover component and the operation button are in contact, the operation button moves backward while applying a reaction force to the cover member (the maximum stroke amount of the operation button is from 0.6 mm to 1.0 mm). Therefore, the force for pressing the cover component and the amount of deflection of the elastic deformation of the cover component are not stable, and there is a problem that the ease of removing the cover component when the cover component is attached to the front side of the scientific calculator is not stable.

[0024] To address the above problem, in the second state when the cover component 20 of the present embodiment is attached to the front side of the scientific calculator 10, as shown in FIGS. 12B and 12C, the cover component 20 and the scientific calculator 10 first come into contact in the region R2, which is the central portion in the vertical direction and both end portions in the left - right direction where a plurality of operation buttons 13 are not provided. Therefore, in the second state when the cover component 20 is attached to the front side of the scientific calculator 10, the cover component 20 and the operation buttons 13 do not come into contact first. Thus, the ease of removing the cover component 20 when the cover component 20 is attached to the front side of the scientific calculator 10 can be stabilized.

[0025] Note that, as shown in FIG. 11B, in the second state when the cover component 20 is arranged on the back side of the scientific calculator 10, the cover component 20 and the scientific calculator 10 are in contact with each other in the region R1 which is the central part in the vertical direction and the central part in the horizontal direction.

[0026] Also, in the conventional cover component and scientific calculator, when the cover component is mounted on the back side of the scientific calculator and when the cover component is mounted on the front side of the scientific calculator, the amount of deflection when the cover component is pressed against the scientific calculator side and elastically deformed is different, so the ease of removing the cover component is also different. That is, there is a problem that the ease of removing the cover component is not stable. In response to the above problem, the width W1 of the first gap A and the width W2 of the second gap B are substantially the same, and the difference between the width W1 and the width W2 is 0.9 mm or less (more preferably 0.5 mm or less). That is, when the cover component 20 is mounted on the back side of the scientific calculator 10 and when the cover component 20 is mounted on the front side of the scientific calculator 10, the amount of deflection when the cover component 20 is pressed against the scientific calculator 10 side and elastically deformed is substantially the same. Therefore, when the cover component 20 is mounted on the back side of the scientific calculator 10 and when the cover component 20 is mounted on the front side of the scientific calculator 10, the ease of removing the cover component 20 is substantially the same, and the ease of removing the cover component 20 is stable. In other words, the difference between the width W1 of the first gap A and the width W2 of the second gap B is set according to the condition regarding the difference between the ease of removing the cover component 20 mounted on the front side of the electronic device (scientific calculator 10) and the ease of removing the cover component 20 mounted on the back side of the electronic device.

[0027] Note that the covered electronic device 100 of the above embodiment may satisfy at least one of the following first condition, second condition, and third condition. The first condition is that, as shown in FIGS. 12B and 12C, in the second state when the cover component 20 is attached to the front side of the scientific calculator 10, the cover component 20 and the scientific calculator 10 are in contact with each other in an area where a plurality of operation buttons 13 are not provided. The second condition is that, as shown in FIG. 7, in the central portion in the vertical direction in the first state when the cover component 20 is attached to the back side of the scientific calculator 10, a first gap A is formed between the cover component 20 and the scientific calculator 10. The third condition is that the width W1 of the first gap A and the width W2 of a second gap B formed between the cover component 20 and the scientific calculator 10 in the central portion in the vertical direction in the first state when the cover component 20 is disposed on the front side of the scientific calculator 10 are substantially the same. Even in this case, the ease of removal when removing the cover component 20 from the scientific calculator 10 can be made appropriate.

[0028] Also, the ease of removal when removing the cover component 20 from the scientific calculator 10 also depends on the shapes and hardnesses of the cover component 20, the engaging portion 22, the front case 11, the back case 15, the locking groove 15a, etc. In the above embodiment, it is assumed that the scientific calculator 10 has the shape and dimensions of a general scientific calculator (a substantially rectangular parallelepiped shape with a depth of 150 to 200 mm, a width of 60 to 90 mm, and a height of 10 to 20 mm), and it is also assumed that the material of the cover component 20 is formed of a general ABS resin (or PS (polystyrene) or other materials as long as they have a Young's modulus equivalent to that of the ABS resin), and the width W1 of the first gap A and the width W2 of the second gap B are determined. However, conversely, at least one of the shape of the cover component 20, the hardness of the cover component 20, the shape of the housing (front case 11 and back case 15) of the scientific calculator 10, the hardness of the housing of the scientific calculator 10, the shape of the engaging portion 22, the hardness of the engaging portion 22, the shape of the locking groove 15a, and the hardness of the locking groove 15a may be set based on the width W1 of the first gap A and / or the width W2 of the second gap B. Also, when the size of the target electronic device such as the scientific calculator 10 is different, the width of the above-described gap, the engagement amount, etc. may be changed at the same ratio as the difference in the size.

[0029] <Modification Example> Next, the covered electronic device 100 according to the modification example of the above embodiment will be described. In the following description, the description will focus on the points different from the covered electronic device 100 according to the above embodiment. Also, for the same configurations as those of the covered electronic device 100 according to the above embodiment, the same reference numerals will be given and the description thereof will be omitted.

[0030] In this modification example, in the second state when the cover component 20 shown in FIGS. 12A to 12C is attached to the front side of the scientific calculator 10, the cover component 20 and the scientific calculator 10 first come into contact with each other in the region R2 which is the central part in the vertical direction and both end parts in the horizontal direction where a plurality of operation buttons 13 are not provided. Next, when the cover component 20 is further pressed toward the scientific calculator 10 in a state where the cover component 20 and the operation buttons 13 are in contact with each other in the region R2, the surfaces of the cover component 20 and the operation buttons 13 come into contact with each other. However, since the cover component 20 and the scientific calculator 10 have already come into contact with each other in the region R2 and the cover component 20 is supported in the region R2, it is difficult for the surface of the operation button 13 to be scratched.

[0031] Note that ribs or protrusions may be provided on the surface of the cover component 20 on the side of the scientific calculator 10. In this case, when the cover component 20 is attached to the front side of the scientific calculator 10, by configuring the ribs or protrusions to come into contact with the region between the operation buttons 13 of the front case 11 and the operation buttons 13, it is possible to prevent the cover component 20 and the operation buttons 13 from coming into contact with each other.

[0032] As described above, the covered electronic device 100 of the present embodiment includes an electronic device (calculator 10) having locking portions (locking grooves 15a) on side surfaces at both ends in the longitudinal direction, and a cover component 20 that can be selectively attached to both the front side and the back side of the electronic device, and engaging portions 22 that engage with the locking portions in a first state having a gap between the electronic device at the central portion in the longitudinal direction, are provided at both ends in the longitudinal direction, regardless of whether the cover component 20 is attached to the front side or the back side. In the covered electronic device 100, the front mounting engagement amount, which is the engagement amount between the engaging portion 22 and the locking portion in the second state in which the central portion in the longitudinal direction of the cover component 20 is elastically deformed to contact the electronic device with the cover component 20 attached to the front side of the electronic device, and the back mounting engagement amount, which is the engagement amount between the engaging portion 22 and the locking portion in the second state in which the central portion in the longitudinal direction of the cover component 20 is elastically deformed to contact the electronic device with the cover component 20 attached to the back side of the electronic device, are made substantially the same, and the shape and the position of the locking portion of the electronic device and the shape and the position of the engaging portion 22 of the cover component 20 are determined. Thereby, the ease of removal when removing the cover component 20 can be made not to differ significantly between the case where the cover component 20 is attached to the front side of the calculator 10 and the case where it is attached to the back side. Therefore, the ease of removal when removing the cover component 20 from the calculator 10 can be made appropriate.

[0033] Further, the covered electronic device 100 of the present embodiment includes an electronic device (calculator 10) having a plurality of operation buttons 13 on the front side, and a cover component 20 that can be attached to the electronic device. The electronic device has locking portions (locking grooves 15a) on the side surfaces at both ends in the longitudinal direction. The cover component 20 is provided at both ends in the longitudinal direction, and has an extending portion 21 that covers at least a part of the side surface of the electronic device, and an engaging portion 22 that is provided at the tip of the extending portion 21 and engages with the locking portion. When the engaging portion 22 is engaged with the locking portion with the cover component 20 disposed on the front side or the back side of the electronic device, a first state is formed in which the engagement amount between the engaging portion 22 and the locking portion is a first engagement amount H1. In the first state, when the cover component 20 is pressed toward the electronic device side and elastically deformed at the central portion in the longitudinal direction of the cover component 20, a second state is formed in which the engagement amount between the engaging portion 22 and the locking portion is a second engagement amount H2 that is less than the first engagement amount H1. The width W1 of the first gap A at the position where the width of the gap is the narrowest, which is the gap formed between the cover component 20 and the electronic device at the central portion in the longitudinal direction in the first state when the cover component 20 is disposed on the back side of the electronic device, and the width W2 of the second gap B at the position where the width of the gap is the narrowest, which is the gap formed between the cover component 20 and the electronic device at the central portion in the longitudinal direction in the first state when the cover component 20 is disposed on the front side of the electronic device, are substantially the same. Thereby, when the cover component 20 is attached to the back side of the calculator 10 and when the cover component 20 is attached to the front side of the calculator 10, the amount of deflection when the cover component 20 is pressed toward the calculator 10 side and elastically deformed can be made substantially the same. Therefore, when the cover component 20 is attached to the back side of the calculator 10 and when the cover component 20 is attached to the front side of the calculator 10, the ease of removal of the cover component 20 is substantially the same, and the ease of removal when removing the cover component 20 from the calculator 10 can be made appropriate.

[0034] In addition, the covered electronic device 100 of the present embodiment includes an electronic device (calculator 10) having a plurality of operation buttons 13 on the front side, and a cover component 20 that can be attached to the electronic device. The electronic device has locking portions (locking grooves 15a) on the side surfaces at both ends in the longitudinal direction. The cover component 20 is provided at both ends in the longitudinal direction, and has an extending portion 21 that covers at least a part of the side surface of the electronic device, and an engaging portion 22 provided at the tip of the extending portion 21 and engaging with the locking portion. When the engaging portion 22 is engaged with the locking portion with the cover component 20 disposed on the front side or the back side of the electronic device, a first state is formed in which the engagement amount between the engaging portion 22 and the locking portion is the first engagement amount H1. In the first state, when the cover component 20 is pressed toward the electronic device side and elastically deformed at the central portion in the longitudinal direction of the cover component 20, a second state is formed in which the engagement amount between the engaging portion 22 and the locking portion is the second engagement amount H2 that is less than the first engagement amount H1. In the covered electronic device 100, the region where the width of the gap formed between the cover component 20 and the electronic device is the narrowest at the central portion in the longitudinal direction in the first state when the cover component 20 is attached to the front side of the electronic device is a region where no plurality of operation buttons 13 are provided. In the second state when the cover component 20 is attached to the front side of the electronic device, the cover component 20 and the electronic device are in contact with each other in a region where no plurality of operation buttons 13 are provided, and are not in contact with each other in a region where the plurality of operation buttons 13 are provided. Thereby, even when the cover component 20 is pressed toward the calculator 10 side, the cover component 20 and the operation buttons 13 do not come into contact with each other. Therefore, by pressing the cover component 20 toward the calculator 10 side, the operation buttons 13 move backward while applying a reaction force to the cover component 20, and it is possible to prevent the force for pressing the cover component 20 and the amount of deflection by which the cover component 20 elastically deforms from becoming unstable. That is, the ease of removing the cover component 20 when the cover component 20 is attached to the front side of the calculator 10 can be made appropriate.

[0035] Also, in the covered electronic device 100 of the present embodiment, when the cover component 20 is attached to the front side of the electronic device (calculator 10), the cover component 20 contacts the electronic device at the longitudinal center portion in the second state and at both end portions in the left - right direction where a plurality of operation buttons 13 are not provided. As a result, even if the cover component 20 is pressed toward the calculator 10 side, the cover component 20 and the operation buttons 13 do not contact each other. Therefore, by pressing the cover component 20 toward the calculator 10 side, while the operation buttons 13 move backward while applying a reaction force to the cover component 20, it is possible to prevent the force for pressing the cover component 20 and the amount of deflection by which the cover component 20 elastically deforms from being unstable. That is, the ease of removing the cover component 20 when the cover component 20 is attached to the front side of the calculator 10 can be made appropriate.

[0036] Also, in the covered electronic device 100 of the present embodiment, the second state is a state in which the cover component 20 first contacts any part of the electronic device when the cover component 20 is pressed toward the electronic device (calculator 10) side at the longitudinal center portion of the cover component 20 from the first state and elastically deformed. Therefore, since the area where the cover component 20 and the electronic device first contact is an area where a plurality of operation buttons 13 are not provided, the second state is a state where the cover component 20 and the operation buttons 13 do not contact each other. That is, by pressing the cover component 20 toward the calculator 10 side, while the operation buttons 13 move backward while applying a reaction force to the cover component 20, it is possible to prevent the force for pressing the cover component 20 and the amount of deflection by which the cover component 20 elastically deforms from being unstable.

[0037] Also, in the covered electronic device 100 of the present embodiment, the difference between the width W1 of the first gap A and the width W2 of the second gap B is 40% or less with respect to the average value of the width W1 of the first gap A and the width W2 of the second gap B. Thereby, when the cover component 20 is attached to the back side of the scientific calculator 10 and when the cover component 20 is attached to the front side of the scientific calculator 10, the amount of deflection when the cover component 20 is pressed against the scientific calculator 10 side and elastically deformed becomes substantially the same. Therefore, when the cover component 20 is attached to the back side of the scientific calculator 10 and when the cover component 20 is attached to the front side of the scientific calculator 10, the ease of removal of the cover component 20 is substantially the same, and the ease of removal of the cover component 20 can be made appropriate.

[0038] Also, in the covered electronic device 100 of the present embodiment, in the first state when the cover component 20 is disposed on the front side of the electronic device, the closest distance between the peripheral portion where the operation button 13 of the electronic device is not disposed and the cover component 20 is within the first range, and the closest distance between the front surface of the operation button 13 in the non-pressed state and the cover component 20 is within the second range, and the minimum value of the second range is larger than the maximum value of the first range. Thereby, even when the cover component 20 is pressed against the scientific calculator 10 side, the cover component 20 and the operation button 13 do not come into contact. Therefore, by pressing the cover component 20 against the scientific calculator 10 side, the operation button 13 moves backward while applying a reaction force to the cover component 20, and it is possible to prevent the force for pressing the cover component 20 and the amount of deflection of elastic deformation of the cover component 20 from being unstable. That is, the ease of removal of the cover component 20 when the cover component 20 is attached to the front side of the scientific calculator 10 can be made appropriate.

[0039] In the covered electronic device 100 of the present embodiment, the width W1 of the first gap A and / or the width W2 of the second gap B are set according to the conditions that the cover part 20 can be easily removed and the attachment of the cover part 20 is stable, based on the shape of the cover part 20 and the shape of the housing of the electronic device when the electronic device (the scientific calculator 10) is an electronic desktop calculator of a standard size and shape. Thereby, it is possible to improve the ease of removal when removing the cover part 20 from the scientific calculator 10 and the stability of attaching the cover part 20 to the scientific calculator 10.

[0040] In the covered electronic device 100 of the present embodiment, the difference between the width W1 of the first gap A and the width W2 of the second gap B is such that when the electronic device (the scientific calculator 10) is an electronic desktop calculator of a standard size and shape and the cover part 20 is formed of a standard material, based on the shape of the cover part 20, the hardness of the cover part 20, and the shape of the housing of the electronic device (the scientific calculator 10), the ease of removal of the cover part 20 is set to be substantially the same when the cover part 20 is attached to the front of the electronic device and when the cover part 20 is attached to the back of the electronic device. Thereby, when the cover part 20 is attached to the back side of the scientific calculator 10 and when the cover part 20 is attached to the front side of the scientific calculator 10, the ease of removing the cover part 20 is substantially the same, and the ease of removing the cover part 20 from the scientific calculator 10 can be made appropriate.

[0041] It should be noted that the embodiments to which the present invention is applicable are not limited to the above-described embodiments, and it goes without saying that various modifications are possible without departing from the gist of the present invention. For example, the electronic device according to the present invention is not limited to a scientific calculator (electronic desktop calculator), and can be widely applied to all electronic devices that protect the main surface with a cover part, such as an electronic dictionary or a smartphone.

[0042] As described above, some embodiments of the present invention have been described. However, the scope of the present invention is not limited to the above-described embodiments, and includes the scope of the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0043] 100 Electronic device with cover, 10 Calculator (electronic device), 13 Operation button 15a Locking groove, 20 Cover part, 22 Engaging part, A First gap, B Second gap

Claims

1. An electronic device having locking portions on side surfaces at both ends in the longitudinal direction, A cover component that can be selectively attached to both the front side and the back side of the electronic device, and that has engaging portions provided at both ends in the longitudinal direction that engage with the locking portions in a first state where there is a gap between the cover component and the electronic device at the central portion in the longitudinal direction, regardless of whether the cover component is attached to the front side or the back side, Comprising, The front mounting engagement amount, which is the engagement amount between the engaging portion and the locking portion in a second state in which the central portion in the longitudinal direction of the cover component is elastically deformed so as to contact the electronic device with the cover component attached to the front side of the electronic device, and the back mounting engagement amount, which is the engagement amount between the engaging portion and the locking portion in the second state in which the central portion in the longitudinal direction of the cover component is elastically deformed so as to contact the electronic device with the cover component attached to the back side of the electronic device, are substantially the same, and the shape and the position of the locking portion of the electronic device and the shape and the position of the engaging portion of the cover component are determined, an electronic device with a cover.

2. An electronic device having a plurality of operation buttons on the front side, and a cover component attachable to the electronic device, The electronic device has locking portions on side surfaces at both ends in the longitudinal direction, The cover component has an extending portion provided at both ends in the longitudinal direction and covering at least a part of the side surface of the electronic device, and an engaging portion provided at the tip of the extending portion and engaging with the locking portion, When the engaging portion is engaged with the locking portion with the cover component disposed on the front side or the back side of the electronic device, a first state is obtained in which the engagement amount between the engaging portion and the locking portion is a first engagement amount, and when the cover component is pressed against the electronic device side and elastically deformed at the central portion in the longitudinal direction of the cover component in the first state, a second state is obtained in which the engagement amount between the engaging portion and the locking portion is a second engagement amount that is less than the first engagement amount, A covered electronic device, which is a gap formed between the cover component and the electronic device at the central portion in the longitudinal direction in the first state when the cover component is disposed on the back side of the electronic device, and the width of the first gap at the position where the width of the gap is the narrowest, is substantially the same as the width of the second gap, which is a gap formed between the cover component and the electronic device at the central portion in the longitudinal direction in the first state when the cover component is disposed on the front side of the electronic device and at the position where the width of the gap is the narrowest.

3. An electronic device having a plurality of operation buttons on the front side, and a cover component attachable to the electronic device. The electronic device has locking portions on the side surfaces at both ends in the longitudinal direction. The cover component has an extension portion provided at both ends in the longitudinal direction and covering at least a part of the side surface of the electronic device, and an engaging portion provided at the tip of the extension portion and engaging with the locking portion. When the engaging portion is engaged with the locking portion with the cover component disposed on the front side or the back side of the electronic device, a first state is formed in which the engagement amount between the engaging portion and the locking portion is a first engagement amount. When the cover component is elastically deformed by pressing it toward the electronic device at the central portion in the longitudinal direction of the cover component in the first state, a second state is formed in which the engagement amount between the engaging portion and the locking portion is a second engagement amount less than the first engagement amount. The region where the width of the gap formed between the cover component and the electronic device at the central portion in the longitudinal direction in the first state when the cover component is disposed on the front side of the electronic device is the narrowest is a region where the plurality of operation buttons are not provided. A covered electronic device, in which when the cover component is attached to the front side of the electronic device in the second state, the cover component and the electronic device are in contact with each other in a region where the plurality of operation buttons are not provided, and are not in contact with each other in a region where the plurality of operation buttons are provided.

4. The covered electronic device according to claim 2 or 3, wherein when the cover component is attached to the front side of the electronic device in the second state, the cover component and the electronic device are in contact with each other at the central portion in the longitudinal direction and at both ends in the left-right direction where the plurality of operation buttons are not provided.

5. The cover-equipped electronic device according to any one of claims 1 to 3, wherein the second state is a state in which the cover component first comes into contact with any part of the electronic device when the cover component is pressed toward the electronic device side and elastically deformed at the central portion in the longitudinal direction from the first state.

6. The cover-equipped electronic device according to claim 2, wherein the difference between the width of the first gap and the width of the second gap is 40% or less with respect to the average value of the width of the first gap and the width of the second gap.

7. In the first state when the cover component is disposed on the front side of the electronic device, the closest distance between the peripheral portion where the operation button of the electronic device is not disposed and the cover component is within a first range, and the closest distance between the front surface of the operation button in a non-pressed state and the cover component is within a second range, and the minimum value of the second range is greater than the maximum value of the first range. The cover-equipped electronic device according to claim 2 or 3.

8. The width of the first gap and / or the width of the second gap is set based on the shape of the cover component and the shape of the housing of the electronic device when the electronic device is an electronic desktop computer of standard size and shape, under the condition that the cover component is easily removable and the attachment of the cover component is stable. The cover-equipped electronic device according to claim 2.

9. The difference between the width of the first gap and the width of the second gap is such that when the electronic device is an electronic desktop computer of standard size and shape and the cover component is formed of a standard material, based on the shape of the cover component, the hardness of the cover component, and the shape of the housing of the electronic device, the ease of removal of the cover component is substantially the same when the cover component is attached to the front of the electronic device and when the cover component is attached to the back of the electronic device. The cover-equipped electronic device according to claim 2.

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