JP4957012B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic apparatus including a power generation device that generates power by supplying fuel.

  In recent years, fuel cells using hydrogen as fuel as a clean power source with high energy conversion efficiency have begun to be applied to automobiles and portable devices. A fuel cell is a device that directly extracts electric energy from chemical energy by electrochemically reacting fuel and oxygen in the atmosphere.

Although hydrogen is mentioned as a fuel used for a fuel cell, since it is a gas at normal temperature, handling and storage are difficult. Thus, electronic devices using liquid fuels such as alcohols and gasoline and equipped with a fuel cell device using liquid fuels have been developed (see, for example, Patent Document 1).
JP 2005-55685 A

  In an electronic device equipped with a fuel cell system, when the fuel container has flexibility, the volume of the fuel container decreases as the fuel is consumed. However, in the conventional electronic device, since the volume of the electronic device main body remains constant, a space is formed in the area where the fuel container is provided in the electronic device as the volume of the fuel container is reduced. there were.

  The subject of this invention is eliminating the useless space which can be made in an electronic device with consumption of a fuel, and reducing an electronic device in size.

In order to solve the above-described problems, the invention according to claim 1 is an electronic device including a power generation device that generates power by supplying fuel, the fuel supplied to the power generation device is filled, and the content of the fuel A flexible fuel container whose volume changes in accordance with the amount; a first casing having the fuel container connected to an end thereof and including a power generator; and the first casing containing the fuel container; A second housing to be fitted, a sensor for sensing a change in the volume of the fuel container, and a movement for sliding the second housing relative to the first housing in response to a signal from the sensor And the first casing is slidably accommodated in the second casing in response to a decrease in the volume of the fuel container.

According to the first aspect of the present invention, the volume of the fuel container accommodated in the second casing is reduced in response to the decrease in fuel, and the first casing is connected to the second casing in response to this. The electronic apparatus can be reduced in size by being slid and housed in the body, and the second casing is moved by the moving means in accordance with a signal from a sensor that senses a change in the volume of the fuel container. Thus, the electronic device can be automatically downsized according to the decrease in the volume of the fuel container .

According to a second aspect of the invention, an electronic apparatus according to claim 1, wherein the sensor is the fuel container is connected in the first housing a inner wall surface of the second housing The pressure sensor is provided on a surface opposite to the surface.

According to the second aspect of the present invention, it is possible to detect a decrease in the volume of the fuel container by detecting whether the fuel container is in contact with the inner wall surface of the second housing by the pressure sensor.

According to a third aspect of the invention, an electronic device according to claim 1 or 2, and the inner wall surface of said second housing, said first outer wall surface and a by the inner wall surface of the housing A locking claw is provided on one of the adjacent portions, and a plurality of teeth that can mesh with the locking claw are arranged in the sliding direction on the other side, and the first casing and the second casing are provided. When the engaging claw and the teeth mesh with each other in the fitted state, movement of the second casing in the reverse sliding direction with respect to the first casing is suppressed.

According to the third aspect of the present invention, the engagement of the engaging claw and the teeth provided on the outer wall surface of the first housing and the inner wall surface of the second housing causes the second housing of the second housing. The movement in the reverse slide direction with respect to the one housing can be suppressed. Moreover, the first housing and the second housing can be slid stepwise by changing the teeth meshing with the locking claws.

According to a fourth aspect of the present invention, there is provided the electronic apparatus according to the third aspect , further comprising a release mechanism that separates the locking claw and the teeth and releases the meshing between the locking claw and the teeth. It is characterized by that.

According to the fourth aspect of the present invention, the first casing and the second casing can be separated by releasing the engagement between the locking claw and the teeth by the release mechanism, and the fuel container Can be exchanged.

Invention of Claim 5 is the electronic device as described in any one of Claims 1-4 , Comprising: The translucent part in which a part of wall surface which makes the said 2nd housing | casing has translucency, It is characterized by becoming.

According to the fifth aspect of the present invention, the remaining amount of the fuel container in the second casing can be confirmed via the light transmitting portion.

  According to the present invention, it is possible to reduce the size of an electronic device in response to a decrease in fuel.

  Hereinafter, embodiments of the present invention will be described in detail.

<First Embodiment>
FIG. 1 is a cross-sectional view of an essential part showing a digital camera 1 as an example of an electronic apparatus to which the present invention is applied. The digital camera 1 includes a first housing 10, a second housing 20, and a fuel container 30. FIG. 1 shows a cross section of the second housing 20 only in the center in the depth direction.

  A lens unit 2, a shutter button 3, a flash device 4, and the like are provided on the front surface of the first housing 10. Although not shown in FIG. 1, a display unit 5, various buttons 7, a dial 8, a key 9, and the like are provided on the rear surface of the first housing 10 (see FIG. 5).

  Further, inside the first housing 10, although not shown, a reformer that generates hydrogen from fuel, a carbon monoxide remover that removes carbon monoxide as a by-product, and generated hydrogen A fuel cell or the like for obtaining electric power by reacting with oxygen is housed. Note that when the fuel is supplied to the fuel cell without being reformed, a reformer and a carbon monoxide remover are unnecessary.

  A fuel container 30 is detachably attached to the other end of the first housing 10 opposite to the one end on the side where the shutter button 3, the flash device 4 and the like are provided. The fuel container 30 is filled with liquid fuel. Here, as the fuel, a mixed liquid of alcohols such as methanol and ethanol, a compound containing hydrogen atoms such as gasoline, and water can be used.

The fuel container 30 is made of a flexible material that is insoluble in fuel. As such a material, for example, a fluororesin can be used. The fuel container 30 contracts as the fuel filled therein decreases, and the volume of the fuel container 30 decreases as shown in FIG.
Further, for example, as shown in FIGS. 3 and 4, the fuel container 30 is formed in a bellows shape so that the fuel container 30 can extend and contract in the vertical direction with respect to the surface of the first housing on which the fuel container 30 is provided. May be.

  The second housing 20 has a box shape having an opening 21 at one end, houses the fuel container 30 therein, and the other end of the first housing 10 to which the fuel container 30 is attached is formed in the opening 21. It is inserted. As shown in FIG. 2, the second casing 20 slides toward the first casing 10 as the volume of the fuel container 30 decreases, and the first casing is reduced by the volume of the fuel container 30. The body 10 is accommodated inside. Hereinafter, this direction is referred to as a forward slide direction, and the opposite direction is referred to as a reverse slide direction.

Here, the second housing 20 may be slid stepwise as the volume of the fuel container 30 decreases, or may be slid steplessly. As a result, the overall size of the digital camera 1 formed by the first housing 10 and the second housing 20 can be reduced.
In addition, the second housing 20 has an L-shaped door 28 (see FIG. 3) that can be opened by releasing a lock mechanism (not shown) only when the user replaces the fuel container 30. Prepare.

  Since the first casing 10 is fitted into the second casing 20 from the end opposite to the end where the shutter button 3, the flash device 4 and the like are provided, the operation of the shutter button 3 is performed. It does not affect the operation of the flash device 4 or the like.

  When the fuel in the fuel container 30 is low, the second housing 20 can be removed from the first housing 10, and then the fuel container 30 can be removed and replaced with a fuel container 30 filled with fuel. As shown in FIG. 5, the second casing 20 is provided with a translucent part 22 made of a translucent member such as plastic or acrylic, and the internal fuel container 30 is interposed via the translucent part 22. You may make it visible from the outside.

  The second casing 20 is fitted with the other end on the opposite side of the first casing 10 on the side where the shutter button 3, the flash device 4 and the like are provided. When the camera 1 is grasped, one end of the first housing 10 on the side where the shutter button 3, the flash device 4 and the like are provided is grasped, so that the second housing 20 does not get in the way during photographing.

  Further, the second housing 20 is a lens provided in the first housing 10 even at a position where the volume of the fuel container 30 is the smallest and the sliding displacement of the second housing 20 in the forward sliding direction is maximized. The unit 2, the flash device 4, the shutter button 3, the display unit 5, etc. are not covered or bumped, and these functions are not hindered. Hereinafter, the position where the first casing 10 and the second casing 20 are just engaged when the volume of the fuel container 30 is the largest is set as the origin of the slide displacement.

Here, an example of a slide mechanism of the second housing 20 with respect to the first housing 10 is shown in FIG. As shown in FIG. 6A, a pinion 16 driven by a motor 49 (see FIG. 7) (not shown) is provided on the outer peripheral surface of the first casing 10 that contacts the second casing 20. A rack 23 that meshes with the pinion 16 is provided on the inner surface of the second housing 20.
In addition, as shown in FIG. 6B, a contact terminal 17 is provided in a concave portion 18 provided on the outer peripheral surface that comes into contact with the second housing 20 of the first housing 10. In addition, the connection terminal 26 is provided in the location corresponding to the recessed part 18 in the inner wall surface contact | abutted with the 1st housing | casing 10 of the 2nd housing | casing 20, and the contact terminal 17 and the connection terminal 26 respond | correspond. The terminals are connected via a wiring (not shown) provided on a flexible substrate 27 made of a flexible member.

  The second housing 20 is provided with a pressure sensor 24 on the inner wall surface facing the end surface to which the fuel container 30 of the first housing 10 is attached. A signal line extending from the pressure sensor 24 to the opening 21 and A plurality of conductive lines 25 including a power supply line are extended along the inner wall surface.

  The flexible substrate 27 is formed in such a length that the contact terminal 17 and the connection terminal 26 can be connected when the slide displacement is zero, and the flexible substrate 27 itself bends in the recess 18 when the slide displacement is large. Thus, the connection between the contact terminal 17 and the connection terminal 26 is maintained. The pressure sensor 24 is connected to a control circuit including a power supply circuit built in the first housing 10 through the conductive wire 25, the connection terminal 26, the flexible substrate 27, and the contact terminal 17.

  The digital camera 1 incorporates a control circuit that drives the pinion 16 in accordance with an input from the pressure sensor 24 or the like. FIG. 7 is a block diagram showing the overall configuration of a control circuit provided in the digital camera 1. As shown in FIG. 7, the control circuit includes a CPU (Central Processing Unit) 41, a RAM (Random Access Memory) 42, a nonvolatile memory 43, an HDD (Hard Disk Drive) 44, an image processing circuit 45, an image sensor 46, and an input. A unit 48, an input / output interface 47, a power source 80, and the like.

  The image sensor 46 converts an image formed by the lens unit 2 into an electric signal. The image processing circuit 45 converts the electrical signal output from the image sensor 46 into digital data. The display unit 5 is connected to the input / output interface 47 and performs screen display according to a display control signal input from the CPU 41.

  The input unit 48 includes various buttons 7, a dial 8, and a key 9 in addition to the shutter button 3 described above, and is connected to the input / output interface 47. The input unit 48 outputs an operation signal corresponding to the operation of the shutter button 3, various buttons 7, dial 8, key 9, etc. to the CPU 41 via the input / output interface 47.

  The nonvolatile memory 43 stores digital data output from the image processing circuit 45. The HDD 44 stores programs and data executed by the CPU 41 in advance. The RAM 42 develops a program executed by the CPU 41 in a program storage area. The RAM 42 temporarily stores data such as processing results generated when the CPU 41 executes the program in the work area.

  The CPU 41 performs various processes according to the program developed in the program storage area of the RAM 42. For example, the CPU 41 outputs a drive signal to the motor 49, calculates the amount of displacement in the sliding direction of the second housing 20 from the output drive signal, and stores it in the work area of the RAM 42.

The pressure sensor 24 detects whether or not the fuel container 30 is in contact by comparing a predetermined pressure threshold value with a sensed pressure. When the fuel container 30 is in contact with the pressure sensor 24, an ON signal is output. If not in contact, an off signal is output to the CPU 41 via the conductive wire 25 and the contact terminal 17.
The motor 49 is driven by a drive signal output from the CPU 41 and rotates the pinion 16.

Next, the operation | movement which slides the 2nd housing | casing 20 is demonstrated.
First, when the fuel in the fuel container 30 is consumed, the volume of the fuel container 30 decreases. Then, since the fuel container 30 is separated from the pressure sensor 24, the pressure sensed by the pressure sensor 24 becomes smaller than a predetermined pressure threshold value, so that the pressure sensor 24 outputs an off signal to the CPU 41.

  The CPU 41 to which the OFF signal is input outputs a forward rotation drive signal to the motor 49, and rotates the pinion 16 counterclockwise in FIG. Then, the second casing 20 slides in the forward sliding direction together with the rack 23 that meshes with the pinion 16.

  When the second casing 20 slides toward the first casing 10 (forward sliding direction) and the fuel container 30 contacts the pressure sensor 24, the pressure detected by the pressure sensor 24 becomes greater than a predetermined pressure threshold. Therefore, the pressure sensor 24 outputs an ON signal to the CPU 41.

  The CPU 41 to which the ON signal is input stops the drive signal output to the motor 49. As a result, the motor 49 stops and the second casing 20 stops sliding. The above operation is repeated until the displacement amount of the second housing 20 reaches a predetermined amount. The displacement amount of the second housing 20 is calculated by the CPU 41 from the drive amount of the motor 49 and stored in the work area of the RAM 42.

  When the slide displacement amount of the second housing 20 stored in the work area of the RAM 42 reaches a predetermined value, the CPU 41 determines that the fuel in the fuel container 30 is low, and passes through the input / output interface 47. Then, the second casing 20 is released on the display unit 5 and a screen (FIG. 8) prompting the replacement of the fuel container 30 is displayed.

  The screen 51 displays a message “Would you like to replace the cartridge?” Prompting the user to release the second housing 20 and replace the fuel container 30 and operate the input unit 48 by the user. Menus 52 and 53 of “OK” or “Cancel” selected by doing so are displayed. Here, the cartridge refers to the fuel container 30.

  When the user operates the various buttons 7, dial 8, key 9, etc., and the user selects the “OK” menu 52, the CPU 41 outputs a reverse rotation drive signal to the motor 49 and rotates the pinion 16 clockwise in FIG. 6. Let Then, together with the rack 23 that meshes with the pinion 16, the second housing 20 slides in the reverse sliding direction until the origin position of the slide displacement is reached.

  At the same time, as shown in FIG. 9, a message box “Replace cartridge” is displayed on the display unit 5, and a menu 54 “OK” is displayed. Further, when the user selects the “OK” menu 54, the power of the digital camera 1 is turned off.

  When the second casing 20 returns to the origin position of the slide displacement, the user opens the door portion 28 included in the second casing 20 and replaces the fuel container 30.

  After that, when the power of the digital camera 1 is turned on, the CPU 41 outputs a forward rotation drive signal to the motor 49, the pinion 16 rotates counterclockwise in FIG. 6, and the second casing 20 becomes the first casing. Slide toward the body 10 side. When the fuel container 30 comes into contact with the pressure sensor 24, the pressure sensor 24 outputs an ON signal to the CPU 41, and the CPU 41 to which the ON signal is input stops the drive signal output to the motor 49.

  In the first embodiment, the supply of power to the pressure sensor 24 may be controlled by the CPU 41. In this case, the CPU 41 rotates the pinion 16 only when the pressure sensor 24 is operated at regular intervals by supplying power to the pressure sensor 24 at regular intervals, and the CPU 41 receives an off signal from the pressure sensor 24. The motor 49 can be controlled so that At this time, if the CPU 41 operates the motor 49 until it receives an off signal from the pressure sensor 24, the power supply time to the pressure sensor 41 can be shortened, so that power consumption can be reduced.

Second Embodiment
Next, a slide mechanism for manually sliding the second housing 20 with respect to the first housing 10 is shown in FIGS. 10 is a perspective view showing the front, side, and top of the digital camera 1 of the second embodiment, FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 10, and FIG. 12 is XII-XII in FIG. FIG. 13 is a cross-sectional view taken along an arrow, and FIG. 13 is a cross-sectional view taken along an XIII-XIII arrow in FIG.

  As shown in FIG. 13, a sawtooth groove 60 is provided on the outer peripheral surface of the first housing 10 that contacts the second housing 20. Further, a locking member 70 having a locking claw 76 that meshes with the sawtooth groove 60 is provided on the inner surface of the second housing 20.

  As shown in FIG. 13, the sawtooth groove 60 is provided with a plurality of teeth 61 protruding upward, and is formed in a sawtooth shape. Each tooth 61 is formed with an inclined surface 62 rising in the sliding direction and a vertical surface 63 perpendicular to the sliding direction alternately and continuously.

As shown in FIG. 12, the locking member 70 includes fixed portions 71 and 71 fixed to the second housing 20, and a movable portion 72 provided to be movable in the front-rear direction with respect to the fixed portion 71. Become. The movable part 72 and the fixed part 71 are connected by an elastic connection part 73.
In addition, although the connection part 73 is U-shaped in FIG. 12, as long as it is a structure which produces an elastic force, it may be changed into another structure, for example, may be Z-shaped.

The front and rear end portions of the movable portion 72 serve as pressing portions 74 that are pressed by the user from the outside of the second housing 20. An arm 75 is provided at the center of the movable portion 72, and a locking claw 76 is provided at the lower portion of the arm 75.
The locking claw 76 protrudes downward from the lower portion of the arm 75, and includes an inclined surface 77 rising in the sliding direction and a vertical surface 78 perpendicular to the sliding direction.
The arm 75 normally presses downward so that the locking claw 76 engages the tooth 61 of the sawtooth groove 60. On the other hand, when the movable portion 72 presses the pressing portion 74 from the front and rear, the arm 75 is deformed so as to raise the central portion, and the locking claw 76 is prevented from engaging the tooth 61 of the sawtooth groove 60. . Although the shape of the arm 75 is M-shaped in FIG. 11, the shape of the arm 75 is arbitrary as long as it is pressed from the front and rear and the central portion is raised.
The second casing 20 is provided with a gap above the arm 75 in order to allow the arm 75 to be deformed.

Next, the operation | movement which slides the 2nd housing | casing 20 is demonstrated.
First, when the fuel in the fuel container 30 is consumed and the volume of the fuel container 30 decreases, the second housing 20 is pressed toward the first housing 10. Then, the inclined surface 77 of the locking claw 76 contacts the inclined surface 62 of the tooth 61 in the serrated groove 60, and the locking claw 76 rises along the inclined surface 62 of the tooth 61. When the locking claw 76 reaches the upper end of the tooth 61 and the second casing 20 is further pressed toward the first casing 10, the locking claw 76 exceeds the upper end of the tooth 61 and the adjacent tooth 61 The inclined surface 77 of the locking claw 76 contacts the inclined surface 62. The above operation is repeated until the inner wall surface of the second housing 20 reaches a position where pressure is applied to the fuel container 30.

  On the other hand, since the vertical surface 78 of the locking claw 76 and the vertical surface 63 of the tooth 61 abut, the second housing 20 does not slide away from the first housing 10. In this way, by engaging the locking claw 76 with the tooth 61, the second housing 20 is prevented from moving in the reverse sliding direction and being detached from the first housing 10, while the second housing 20 is moved in the sliding direction. Can be slid.

  When the fuel in the fuel container 30 is low, the second housing 20 is released. However, since the locking claw 76 is locked to the tooth 61 in the sawtooth groove 60, the second housing 20 cannot be released as it is. Therefore, it is necessary to release the engagement between the locking claw 76 and the tooth 61.

In order to release the engagement between the locking claws 76 and the teeth 61, the pressing portions 74 at the front and rear ends of the movable portion 72 are pressed. Then, the central portion of the arm 75 is raised, and the locking claw 76 is disposed above the upper end of the tooth 61 of the sawtooth groove 60. Thereby, the latching claw 76 and the tooth 61 are separated from each other, and the meshing is released.
In this state, the second casing 20 can be detached from the first casing 10 by moving the second casing 20 in the reverse sliding direction.

  When the second casing 20 is removed from the first casing, the fuel container 30 is replaced, the fuel container 30 is accommodated in the second casing 20, and the end of the first casing 10 is attached to the second casing. The engaging claw 76 is engaged with the teeth 61 of the sawtooth groove 60 by being fitted into the body 20.

  In order to prevent the second housing 20 from being removed manually, as shown in FIG. 14, the second housing 20 is engaged with the teeth 61 of the serrated groove 60 at the opening 21 side end of the inner wall of the second housing. You may provide the stopper 79 which stops. Further, the front and rear ends (pressing portion 74) of the movable portion 72 may be prevented from being exposed from the front and rear surfaces of the second housing, and the movable portion 72 may not be pressed from the front and rear. In this case, similarly to the first embodiment, the fuel container 30 can be replaced by providing the second casing 20 with the door portion 28 having an L-shaped cross section.

  According to the above embodiment, the entire digital camera 1 is accommodated by housing the first housing 10 in the second housing 20 in which the fuel container 30 is housed as the volume of the fuel container 30 decreases. Can be reduced in size.

  In any of the above-described embodiments, the shape of the fuel container 30 changes as the amount of fuel remaining in the fuel container 30 decreases, so that the user visually observes the shape of the fuel container 30 via the translucent portion 22. By doing so, it can be confirmed that the remaining amount of fuel has decreased. In particular, in the second embodiment, the second housing 20 is slid in the forward sliding direction by the user's manual operation, so that the user can appropriately check the decrease in the remaining amount of fuel. The two cases 20 can be slid.

  Moreover, the translucent part 22 may be provided in two or more surfaces of the 2nd housing | casing 20, and the 2nd housing | casing 20 may be formed with the member which has translucency. In these modified examples, the deformation of the fuel container 30 inside the second housing 20 can be more easily seen.

Furthermore, in the above embodiment, the digital camera 1 includes the first casing 10, the second casing 20, and the fuel container 30, and the first casing 10 slides into the second casing 20. Although it is configured to be accommodated, the first casing and the second casing 20 may be integrated. And the part (housing part) corresponding to the 2nd housing | casing 20 in the said embodiment is formed by the member which has flexibility, or is made into a bellows-like structure, and the fuel container 30 is accommodated in this accommodating part. . In this case, the volume of the digital camera 1 is decreased according to the decrease in the volume of the fuel container 30 by changing the volume of the storage unit according to the change in the volume of the fuel container 30 as in the above embodiment. Can do.
In this modification, each member, pressure sensor, etc. for meshing the first casing 10 and the second casing in the above embodiment are not required, and the number of parts can be greatly reduced.

  Furthermore, the storage unit of the above modification may be configured to include a fuel inlet for injecting fuel, and the storage unit itself may be filled with fuel. In this case, since the fuel container 30 is not necessary, the number of parts can be further reduced.

  In the above embodiment, the digital camera 1 has been described. However, the present invention is not limited to this, and a notebook personal computer, a mobile phone, a PDA (Personal Digital Assistant), an electronic notebook, a wristwatch, a digital video camera, a game device, The present invention can be applied to game machines and other electronic devices.

It is principal part sectional drawing which shows the digital camera 1 which concerns on this invention. It is principal part sectional drawing which shows when the fuel container 30 of the digital camera 1 of FIG. 1 reduces in volume. It is a perspective view which shows the digital camera 1 of another form. It is principal part sectional drawing which shows when the fuel container 30 of the digital camera 1 of FIG. 3 reduces in volume. It is a perspective view which shows the digital camera 1 of another form. (A) It is a schematic cross section which shows the mechanism which slides the 2nd housing | casing 20 with respect to the 1st housing | casing 10. FIG. (B) It is a principal part expanded sectional view of the 2nd housing | casing 20. FIG. 2 is a block diagram illustrating an overall configuration of a control circuit provided in the digital camera 1. FIG. It is a screen displayed on the display unit 5. It is a screen displayed on the display unit 5. It is a perspective view which shows the digital camera 1 of another form. It is XI-XI arrow sectional drawing of FIG. It is XII-XII arrow sectional drawing of FIG. It is XIII-XIII arrow sectional drawing of FIG. It is principal part sectional drawing which shows the digital camera 1 of another form.

Explanation of symbols

1 Digital camera (electronic equipment)
10 first housing 16 pinion (moving means)
20 Second housing 22 Translucent portion 23 Rack (moving means)
24 Pressure sensor 30 Fuel container 61 Tooth 76 Locking claw

Claims (5)

An electronic device including a power generation device that generates power by supplying fuel,
A flexible fuel container that is filled with fuel to be supplied to the power generation device and whose volume changes according to the internal volume of the fuel;
A first housing having a fuel cell connected to an end portion of the fuel container;
A second housing for mating with said first housing accommodating the fuel receptacle,
A sensor for sensing a change in volume of the fuel container;
Moving means for slidingly moving the second casing relative to the first casing in response to a signal from the sensor ;
The electronic apparatus is characterized in that the first casing is slid and accommodated in the second casing in accordance with a decrease in the volume of the fuel container. Claim 1 wherein the sensor is characterized in that a pressure sensor provided on a surface facing the surface on which the fuel container is connected in the first housing a inner wall surface of the second housing The electronic device as described in. A locking claw is provided on one of the inner wall surface of the second housing and the outer wall surface of the first housing adjacent to the inner wall surface. A plurality of meshable teeth are arranged in the sliding direction,
In a state where the first casing and the second casing are fitted, the locking claw and the teeth mesh with each other, so that the second casing reversely slides with respect to the first casing. the electronic device according to claim 1 or 2, characterized in that to suppress the movement. The electronic apparatus according to claim 3 , further comprising a release mechanism that separates the locking claw and the teeth and releases the meshing between the locking claw and the teeth. The electronic device according to any one of claims 1 to 4, characterized in that part of the wall forming the said second housing has a light transmitting portion having a light-transmitting property.

Images