JPS6216743Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a power supply device applied to radio receivers and other various electronic devices, and particularly relates to automatic opening and closing of an opening for inserting a power cord.

Conventionally, various electronic devices that use AC power have always been provided with an opening for inserting a power cord in a part of the housing, and the power cord plug is inserted through this opening.

However, in the past, since the opening was always left open, foreign objects were inserted into the opening, causing various problems, and the opening was also undesirable in terms of appearance. It is also possible to close the opening with a separate lid when the AC power is not in use, but this is very troublesome and
There are problems such as the lid being easily lost.

The present invention has been devised to correct the above-mentioned defects, and includes a housing for storing an AC adapter in an electronic device housing and an opening for inserting a power cord leading into the housing. A lid body that opens and closes the opening and a spring that biases the lid body to a closed state are provided.
When the AC adapter is stored, the lid is pushed by the AC adapter and opened against the spring, and the power cord can be inserted through the power cord insertion opening to supply power to the AC adapter. This is a power supply device configured to be.

According to the power supply device configured in this way, when the AC adapter is stored in the storage part of the housing, the lid body that closes the power cord insertion opening is automatically opened against the force of the spring. . And vice versa, AC
When the adapter is removed from the housing, the spring automatically closes the lid that opens the power cord insertion opening.

An embodiment in which the present invention is applied to electronic equipment such as a radio receiver will be described below with reference to the drawings.

Note that this electronic device 1 is a dual-use power source type that can use either AC power or DC power.

Next, Figure 1, Figure 2, Figure 3, Figure 4, and Figure 5A.
The outline of the power supply device will be explained with reference to the drawings and FIG. 5B.

First, a battery storage section 3 is provided on, for example, the top surface of a housing 2 of an electronic device 1, at a position biased toward, for example, the rear end side. An auxiliary battery storage section 4 is provided on one side of the battery storage section 3. The upper openings of both battery storage sections 3, 4 are connected to the housing 2.
The battery is closed by a removable battery cover 5.
The third locking member 1 is formed with a pair of locking claws 6 integrally formed on the front end side and a pair of movable locking claws 7 also serving as knobs attached to the rear end side, which are locked with a pair of locking holes 10 and 11 formed on the front and rear inner walls 8 and 9 of the battery storage section 3.
It is attached to the housing 2 as shown in the figure.

Next, as shown in FIGS. 2 and 3, for example, four terminal springs 13a, 13b, 13c, and 13d are attached to the inner wall 8 on the front end side of the battery storage section 3 in a horizontal row at predetermined intervals. It is being Note that these terminal springs 13a to 13d are constituted by conductive conical coil springs, and serve as electrode lead-out terminals for the negative electrode of the dry battery. Further, for example, four terminal plates 14a, 14b, 14c, and 14d are attached to the inner wall 9 of the battery storage portion 3, for example, on the rear end side, in a horizontal row at predetermined intervals. These terminal plates 14a to 14d are made of conductive plates, and are opposed to the terminal springs 13a to 13d, respectively, and serve as electrode lead-out terminals for the positive electrode of the dry battery.

When a DC power source is used as a power source for the electronic device 1, a battery is stored in the battery storage section 3. In this case, the batteries are, for example, 8 dry batteries 15.
is used, and this is divided into two parts each as shown in Figs.
Terminal springs 13a to 13d are turned in the same direction one by one.
and the terminal plates 14a to 14d. In this battery storage state, the eight dry batteries 15 are electrically connected in series, and the positive terminal and negative terminal of the power supply circuit are connected to the terminal board 14a arranged approximately diagonally within the battery storage section 3. and terminal spring 13a
It is composed of: Further, in this battery storage state, the eight dry cells 15 are held down by a cushion 16 attached to the inner surface of the dry cell lid 5 as shown in FIG.

Further, as shown in FIGS. 2 and 9, terminal springs 17 and terminal plates 18 similar to those described above are attached to both the front and rear ends of the auxiliary battery storage section 4, and two dry cell batteries, for example, are attached as auxiliary batteries. 19 are stored in series.

By the way, this electronic device 1 is configured to use an AC adapter 21 as shown in FIG. 1 when an AC power source is used as a power source. Note that this AC adapter 21 is, for example, a unit (pack) of a power transformer, a rectifier circuit, etc., or a unit (pack) of a power transformer, a rectifier circuit, a regulator, etc. Case 22 as shown in FIG.
For example, a power transformer 23, a rectifier circuit board 2
4. It has a built-in voltage switch 25, a power cord insertion jack (power inlet) 26, etc. Further, the external dimensions of the AC adapter 21 are formed to be substantially the same as the internal volume and shape of the power supply storage section 3.

As shown in FIGS. 4 and 5B, the AC adapter 21 is configured to be detachably stored in the battery storage section 3. In addition, AC adapter 2
1 is stored in the battery compartment 3, the positive terminal 29 and the negative terminal 30, which are provided at diagonal positions near the corners of the rear end wall 28 and the front end wall 27 of the case 22, are connected to the The AC adapter 21 is configured to be electrically connected to the power circuit of the electronic device 1 by being crimped to the terminal plate 14a and the terminal spring 13a, which constitute a positive terminal and a negative terminal, respectively.

Therefore, when using an AC power source, remove the dry battery 15 from the battery compartment 3, store the AC adapter 21 in the battery compartment 3 as shown in FIGS. 4 and 5B, and insert the fourth Figure and 8th
AC power can be used by inserting the power plug 33 of the power cord 32 as shown in Figure B.

However, as mentioned above, inside the battery compartment 3
A power supply device in which the AC adapter 21 can be detachably stored has the following advantages.

(a) Since the structure is such that the battery, which is a power supply unit for DC power supply, and the AC adapter 21, which is a power supply unit for AC power supply, are selectively stored in the battery compartment 3, the The space for accommodating either one is substantially omitted, and the entire electronic device 1 can be significantly downsized.

(b) Since the power transformer 23, etc., which are heavy parts, are built into the AC adapter 21 and can be removed outside the set, it is easier to use than when the power supply part for AC power, such as the power transformer 23, is built into the set. , the weight of the set itself can be greatly reduced,
When using batteries, the set becomes very light, making it especially convenient to carry.

(c) By incorporating the power transformer 23, rectifier circuit board 24, voltage switch 25, etc. into the AC adapter 21 and removing them from the set, the set itself can be treated as a device using DC power. Therefore, since the voltage differs depending on the country and the standards of the power transformer 23 itself also differ, the AC adapter 2
It is only necessary to make the first part conform to the safety standards of the destination, which is very advantageous in terms of the safety standards of the set.

(d) Also, since the set itself is treated as a device using DC power, the set itself is common to all destinations, and can be shipped anywhere by simply replacing the AC adapter 21.

(e) A battery is used for the DC power source, and only the AC power source is packaged, and the battery is stored in the space where the AC adapter 21 is removed, so that it can also be used as a DC power source. Since it is not made into a package, when selling
The AC adapter 21 can be stored and shipped as a set, eliminating the need for a separate DC power pack and accessories. In addition, when using a set at home, AC power supply is usually used exclusively, but in this case, if the DC power supply is stored in a pack, the DC power pack that is used less frequently may be lost. However, such inconvenience does not occur at all.

Next, the mounting structure of the AC adapter 21 in the battery compartment 3 is shown in Figures 1, 4, 5A and 5.
To explain using diagram B, first, AC adapter 2
For example, a pair of locking claws 35 and 36 are integrally formed on the front end wall 27 and the rear end wall 28 of the case 22. Note that these locking claws 35 and 36 do not have elasticity and are constructed as highly rigid claws. On the other hand, in both inner walls 8 and 9 of the battery storage portion 3, there are, for example, a pair of locking holes 3 corresponding to the pair of locking claws 35 and 36.
7 and 38 are provided. Further, a pair of substantially vertical ribs 41 are integrally formed on the left and right side walls 39 and 40 of the case 22 of the AC adapter 21 at positions on the front end sides thereof. On the other hand, a pair of substantially horizontal ribs 44 are integrally formed on both the left and right inner walls 42, 43 of the battery storage portion 3 along a predetermined height position. As shown in FIG. 5A, a downwardly sloped slope 45 is formed on, for example, the front end of the pair of ribs 44, and a slope 45 with a downward slope is formed between the sloped lower end and the inner wall 8 on the front end side of the battery storage section 21. A notch 46 is formed in the. As shown in FIG. 5B, the distance l ₁ between the lower end of the slope 45 of the rib 44 and the inner wall 8 is approximately equal to the distance l ₂ between the tip of the locking pawl 35 and the rear surface of the rib 41. The height _h1 between the lower end position of the slope 45 of the rib 44 and the upper surface of the locking hole 37 is equal to that of the locking claw 3.
The height h2 between the upper surface of the rib 41 and the lower end of the rib 41 is slightly smaller than the height _h2 . Incidentally, each of the pair of locking claws 35 and 36 has a slope 4 on the lower surface of the tip thereof.
7 and 48 are formed. Further, a pair of step portions 50 and 51 are formed on the upper surface 49 of the case 22 along the rear end side and the front end side, and the step portion 50 on the rear end side is provided with, for example, a pair of left and right fingertip locking portions 52. It is being

When installing the AC adapter 21 into the battery compartment 3, first insert the front end of the AC adapter 21 into the battery compartment 3 as shown by the dashed line in Fig. 5A.
Drop it diagonally inside. Then AC adapter 2
The lower ends of the pair of ribs 41 on the side 1 are brought into contact with the pair of ribs 44 on the side of the battery compartment 3,
The front end side of 1 is supported at a predetermined height.

Then, when you lock your fingertips in the pair of fingertip locking parts 52 and pull the AC adapter 21 toward the front side of the housing 2 in the direction of arrow a in FIG. 44 in the direction of arrow a in FIG. 5A, and eventually slides down on a pair of slopes 45 in the direction of arrow b. As a result, the pair of locking claws 35 on the front end of the AC adapter 21 are guided toward the pair of locking holes 37 on the front end of the battery storage section 3. And a pair of ribs 4 as shown by solid lines in Fig. 5A.
1 reaches the lower end of the slope of the pair of slopes 45,
The pair of locking claws 35 reach just before the pair of locking holes 37, and at this time, the front end wall 27 of the adapter 21 comes into contact with the four terminal springs 13a to 13d inside the battery storage section 3.

Then, when the AC adapter 21 is continued to be pulled in the direction of arrow b, the terminal springs 13a to 13d are slightly compressed, and the pair of locking claws 35 are moved to the position shown in FIG. 5A.
It is shallowly inserted into the pair of locking holes 37 as shown by the dotted chain line. At about the same time, the pair of ribs 41 are removed from the lower end portions of the slopes 45 toward the pair of notches 46, as indicated by two-dot chain lines in FIG. 5A.

Then, when the AC adapter 21 is pulled further in the direction of arrow b, the pair of locking claws 3
5 is deeply inserted into the pair of locking holes 37, and the terminal springs 13a to 13d are further compressed. Therefore, if the AC adapter 21 is rotated in the direction of arrow c in FIG. 5A with the pair of locking claws 35 as the center of rotation (in reality, it is only pressed down very lightly using the AC adapter's own weight), The AC adapter 21 sinks into the battery storage part 3, and the pair of locking claws 36 on the rear end side slide down along the inner wall 9 on the rear end side of the battery storage part 3. This rotation causes the pair of locking claws 36 to lock into the pair of locking holes 36 on the rear end side of the battery storage section 3, as shown by the three-dot chain line in FIG. 5A.
Reach a position opposite. At this time, a pair of step portions 54 are formed at the lower end positions of the pair of locking holes 38 by the upper ends of the terminal plates 4b, 14c, and the pair of locking claws 36 are brought into contact with these step portions 54. ,
Further descent is prevented. Also, at this time, the AC adapter 21 is in a substantially horizontal state.

Therefore, in this state, when you release your fingertips from the pair of fingertip locking parts 52, the AC adapter 21 will release the terminal spring 13.
As shown in FIG. 5B, the pair of locking pawls 36 are pushed back in the direction of arrow d, which is the rear side with respect to the housing 2, by the compressive repulsive force of groups a to 13d, and the pair of locking claws 36 are pushed back into the pair of locking holes 37.
inserted within. However, at this time, the pair of locking pawls 35, which were previously inserted into the pair of locking holes 37, have a margin for insertion, and the engaged state is maintained as shown in FIG. 5B. The positive terminal 29 of the AC adapter 21 is strongly crimped to the terminal plate 14a of the battery storage section 3 by the compressive repulsive force of the terminal springs 13a to 13d, and the negative terminal 30 of the AC adapter 21 is connected to the terminal plate 14a of the battery storage section 3. The terminal spring 13a is strongly crimped.

At this time, due to the guiding action of the slopes 47 and 48 provided on each pair of locking pawls 35 and 36, each pair of locking holes 3 of each pair of locking pawls 35 and 36 are closed.
7, 38 is smoothly inserted.

Moreover, at this time, as shown in FIG. 5B, the front end wall 27 and the rear end wall 28 of the AC adapter 21 are configured as inclined surfaces with respect to the vertical surface,
In particular, since the terminal springs 13a to 13d are pressed against the inclined front end wall 27, the terminal springs 13a to 13d are pressed against the inclined front end wall 27.
An upward force due to the pressure of the group 3d acts on the AC adapter 21. Therefore, the AC adapter 21 is pushed in the direction of arrow d in FIG. 5B, and
As each pair of locking claws 35 and 36 is pushed upward (in the direction of arrow e), the upper surface 5
5 and 56, the upper surfaces 57 and 58 of each pair of locking holes 37 and 38 are strongly pressed. As a result, the AC adapter 21 can be installed very stably and firmly within the battery storage section 3 without any wobbling in the front-rear direction, left-right direction, and up-down direction.

At this time, the terminal springs 13a to 13d are gradually curved upward toward their tips (so-called nose-bent shape), and the AC is
It is also possible to generate a force that pushes the adapter 21 upward (in the direction of arrow e).

However, as mentioned above, inside the battery compartment 3
With the AC adapter 21 removably housed, each pair of locking claws 35 and 36 provided on the AC adapter 21 are engaged with each pair of locking holes 37 and 38 provided in the battery compartment 3. and in the engaged state, connect the AC adapter 21 to the terminal springs 13a~
The power supply device which is pressed in a predetermined direction (direction of arrow e) by the spring force of group 13d to maintain the engaged state has the following advantages.

(a) As mentioned above, the AC adapter 21 has built-in heavy parts such as the power transformer 23, so the weight of the AC adapter 21 is approximately 800 mm.
It is very heavy with g. For this reason, the AC adapter 21 is very prone to rattling inside the battery compartment 3, but according to the above structure, each pair of locking claws 35,
36 and the locking holes 37, 38 and pressing in a certain direction by the terminal springs 13a to 13d, the AC adapter 21 is moved in the front-rear direction, left-right direction, and up-down direction within the battery storage section 3. It can be installed extremely stably and firmly without any wobbling.

(b) The AC adapter 21 is mechanically attached to the housing 2 by engaging the highly rigid locking claws 35 and 36 provided on the AC adapter 21 into the locking holes 37 and 38 provided on the housing 2. Since the AC adapter 21 is firmly attached, the weight load of the AC adapter 21 is transferred to the battery cover 5.
does not participate at all. Therefore, for example, when the electronic device 1 is turned upside down or due to large vibrations, the AC
There is no inconvenience such as the battery cover 5 accidentally coming off or being damaged due to the weight load of the adapter 21, and it is extremely strong and reliable.

(c) Since the AC adapter 21 is pressed in a predetermined direction by the group of terminal springs 13a to 13d, and there is no need to support the AC adapter 21 with any other object (other than the battery cover), there are no parts required. The number of points can be drastically reduced, leading to significant cost reductions.

(d) Connect the AC adapter 21 to the terminal springs 13a to 13
Simply insert it into the battery compartment 3 against the spring force of group d, and press it lightly from top to bottom (actually, you can use the AC adapter's own weight) to insert it with a single touch, making it easy to operate. Very expensive.

Note that, as described above, the AC adapter 21 is extremely heavy. Therefore, when inserting each pair of locking claws 35 and 36 of the AC adapter 21 into each pair of locking holes 37 and 38 provided in the battery storage section 3, each pair of ribs 41 and 44 described above are inserted. Without it,
While the operator lifts up this extremely heavy AC adapter 21 by hand, the locking claws 35 and 36 must be aligned (height-aligned) with respect to the locking holes 37 and 38. In such a method, for example, as shown in Fig. 12, the hand may slip;
There is a major inconvenience in that the AC adapter 21 tends to fall into the battery storage section 3 and the above alignment cannot be easily performed.

However, according to this electronic device 1, the AC adapter 21 is supported by the pair of ribs 41 provided on the AC adapter 21 and the pair of ribs 44 provided inside the battery storage part 3, and The positioning (height alignment) of the locking claws 35 and 36 can be performed automatically, and the AC adapter 21 can be inserted as desired by sliding it on the rib 44. Therefore, the AC adapter 21 can be installed in the battery storage section 3 very smoothly and easily. Another advantage is that it can be installed smoothly, giving it a luxurious feel. In this case, the slope 45 of the rib 44 is provided for the purpose of making it easier for the AC adapter 21 to slide down, so it is not necessary to provide it.

Next, the opening/closing structure of the opening for power cord insertion is
Fig. 4, Fig. 6A, Fig. 6B, Fig. 7, Fig. 8
To explain using Figure A and Figure 8B, first, AC
The jack 26 for inserting the power cord of the adapter 21 is provided in an open state on the rear side of the rear end wall 28 of the case 22 at approximately the center thereof.
The jack 26 has a structure in which the pair of connector pins 60 are retracted inward from the rear end surface 61 of the jack 26. Therefore, the power plug 33 has a structure in which it has a socket for the connector pin 60.

On the other hand, when the AC adapter 21 is housed in the battery storage section 3, a relatively large opening 62 is provided in the inner wall 9 on the rear end side, facing the jack 26. Further, an opening 64 for inserting a power cord is provided in the rear panel 63 of the housing 2, facing the jack 26. The inner wall 9 and the rear panel 63 are formed into a double wall, and a lid 66 for opening and closing the opening 64 is provided in a gap 65 between them in a substantially vertical manner. The upper end 67 of the lid 66 is bent forward at a substantially right angle, and is inserted through the inner opening 62 and into the upper end position in the battery storage portion 3 to a predetermined length.
Further, as shown in FIG. 7, the lid body 66 is engaged with a pair of left and right guide grooves 70 provided in the inner wall 9, and is configured to be able to reciprocate vertically along the guide grooves 70 and return It is constantly biased upward by a spring 68.

First, when the AC adapter 21 is removed from the battery compartment 3, the lid 66 is raised by the return spring 68 as shown in FIGS. 6A and 8A, and the opening 64 is opened by the lid 66. It is in a closed state. At this time, the lid 66 is stopped with its upper end 67 in contact with the upper end of the inner opening 62.

Next, when installing the AC adapter 21 into the battery compartment 3, as described above, attach the terminal spring 13a.
While strongly compressing the ~13d group, the pair of locking claws 3
5 into the pair of locking holes 37 diagonally from above, the stepped portion 69 of the case 22 provided under the jack 26 portion of the AC adapter 21 is placed on the upper end 67 of the lid 66 as shown in FIG. 8A. be touched.

Therefore, as mentioned above, the AC adapter 21
The rear end side is pressed in the direction of arrow c, and the battery compartment 3 is inserted into the battery compartment 3 in a substantially horizontal manner. , this lid body 66 is lowered against the return spring 68. That is, the lid 66 is automatically lowered as the AC adapter 21 is inserted, and when the AC adapter 21 is completely housed in the battery compartment 3, the lid 66 is lowered as shown in FIGS. 6B and 8B. Once fully lowered, the aperture 64 is automatically and completely opened.

Note that when the AC adapter 21 is removed from the battery storage section 3, the lid 66 is automatically raised by the return spring 68, and the opening 64 is automatically closed.

The opening/closing structure of the power cord insertion opening described above is a structure in which the lid body 66 is slid in the vertical direction, but as shown in FIGS. 10 and 11, for example, the lid body 66 is rotated. It is also possible to modify the structure.

That is, in the modification shown in FIGS. 10 and 11,
A lid body 66 is rotatably supported on the outer surface of the inner wall 9 via a fulcrum shaft 71, and the lid body 66 is rotatably biased toward the closed state of the opening 64 by the return spring 68. It is configured as follows. In this case, there is an AC adapter 21 inside the battery compartment 3.
When the case 22 is stored, a protrusion 72 provided on a part of the case 22 is brought into contact with a part 73 of the lid 66 and pushed downward, thereby returning the lid 66 against the spring 68. The opening 64 is automatically opened by rotating the opening 64.

However, as mentioned above, AC adapter 2
According to the power supply device in which the cover body 66 of the power cord insertion opening 64 is automatically opened when the battery storage unit 1 is housed in the battery storage portion 3, there are the following advantages.

(a) Since the lid 66 can be automatically opened and closed by inserting and removing the AC adapter 21 into and out of the battery storage section 3, there is no need for the operator to open or close the opening 64 each time.

(b) In particular, a structure in which the opening 64 is opened and closed with a separate lid that is detachable from the housing 2 is not only inconvenient for operation, but also makes it easy to lose the lid, but this does not happen at all.

(c) When the AC adapter 21 is not used, in other words when the battery is used, the opening 64 is always closed, so the battery inside the battery compartment 3 cannot be seen through the opening 64, and the opening 64 is always closed.
4, there is no risk of foreign matter entering the circuit and touching live parts and causing it to shoot, generate heat, or damage the circuit, making it very safe.

(d) If the lid 66 is colored in a different color from the rear panel 63 or has a predetermined display, opening and closing of the lid 66 will open the battery compartment 3.
Is there a battery inside or AC adapter 2?
It is very convenient to be able to identify (display) whether 1 is included.

By the way, the two auxiliary battery dry batteries 19 stored in the auxiliary battery storage section 4 are so-called backup batteries, and are used, for example, as a power source for storing the selected frequency of a radio or as a clock. It is used only as a power source, and is used auxiliary to supply current to these tuning frequency storage circuits and clock circuits only when replacing batteries, for example. Therefore, the current consumption of these dry batteries 19 is extremely small, and there is usually no need to replace the batteries for about two years, and they are often left in the auxiliary battery storage section 4.

Therefore, like the dry battery 15 which is the main battery stored in the battery storage part 3, the auxiliary battery storage part 4
The dry batteries 19 housed inside must also be secured in some way to prevent them from falling off unexpectedly due to vibrations, shocks, etc. At this time, a method of fixing the dry battery 19 together with other dry batteries 15 with the battery cover 5 can be considered, but in this case, each time the battery cover 5 is removed to replace the dry battery 15. However, the dry battery 19 tends to come off unexpectedly, which is inconvenient and impractical. Therefore, it is absolutely necessary to separate this dry battery 19 from the other dry batteries 15 and fix it alone.

Note that FIG. 13 shows a conventional structure that is very commonly adopted in this type of electronic equipment, in which a battery storage portion 76 is integrally molded into a synthetic resin casing (or chassis) 75. At that time, the battery holding part 77 is integrally formed by pressing and cutting, and the pair of dry batteries 7 is
Among 8a and 78b, one 78a is connected to the battery holding part 7.
7 and is configured to be pressed down. Note that 79 and 80 in the figure are terminal plates and terminal springs that constitute the positive terminal and the negative terminal.

However, in such a conventional structure, a through hole 82 is always formed in a part of the bottom 81 of the battery storage section 76 due to the characteristics of the press-cutting process, and unless this through hole 82 is sealed and corrected with a separate material, it is impossible to pass through this through hole 82. There is a risk of liquid leaking inside the device. Further, there is always variation in the diameter of the dry batteries 78a, 78b, and there is always variation in the inner diameter of the battery holding portion 77 portion due to integral molding. Therefore, due to these variations, it is difficult to completely suppress the wobbling of the dry battery 78a using the battery holding portion 77.

However, in the power supply device of this electronic device 1, as shown in FIGS. 1, 2, 4, and 9, a leaf spring 84 is attached to a set screw 85 on one end of the auxiliary battery housing 4. A pair of dry batteries 19a, 19b are attached to the tip 86 of the leaf spring 84.
One of them 19a is configured to be pressed and fixed. Note that the plate spring 84 may be made of various materials such as metal or synthetic resin, and does not necessarily have to be plate-shaped, but may be a linear or rod-shaped member.

Such a power supply device has the following advantages.

(a) Since the dry battery 19a is held down and fixed by the spring force of the leaf spring 84, it is possible to completely suppress the looseness caused by variations in the diameter of the dry battery 19a. Since it does not deteriorate, there is no need to worry about liquid leakage, and the reliability is extremely high.

(b) When replacing the dry battery, by removing the dry battery 19b from the terminal board 18 side, the dry battery 19a held down by the leaf spring 84 can be easily removed. Therefore, battery replacement is much easier than in a case where a dedicated battery cover is attached to the auxiliary battery compartment 4, where the battery cannot be replaced without removing the entire battery cover. can be done.

(c) If the dedicated battery cover and its mounting structure were to be made of synthetic resin molding, the cost of the mold would be high, and depending on the structure, complicated modifications would be required. Although the cost for modification will be large, the above-described structure can meet the required conditions with a single leaf spring 84 made of sheet metal or the like, resulting in a very low cost.

Although the embodiments of the present invention have been described above, further modifications can be made based on the technical idea of the present invention.

For example, the present invention can be widely applied as a power supply device for various electronic devices other than radio receivers.

Further, the structure and shape of the AC adapter and the storage section in the present invention are not limited to those shown in the drawings, and can be changed to various other effective structures and shapes. In particular, in the embodiment, the AC adapter 21 is stored in the battery storage part 3, and the AC adapter 21 is stored in the battery storage part 3. It is also possible to provide a section.

In addition, in the embodiment, there is a jack 2 for inserting the power cord.
6 is provided on the AC adapter 21. For example, when the jack 26 is provided on the side of the housing 2 and the AC adapter 21 is stored in the battery storage section 3, etc., the jack 26 may be provided in the opening for inserting the power cord corresponding to the jack 26. It is also possible to change the lid body so that it can be opened. In this case, AC adapter 21
A connector pin is provided in the battery compartment 3, and a connector receiving part to which the jack 26 is connected is also provided in the battery storage part 3.
When the AC adapter 21 is stored, the connector pin and the connector receiving part are connected, and power is supplied to the AC adapter 21 in this state.

Further, the lid body and its opening/closing structure referred to in the present invention are not limited to those shown in the drawings, and can be changed to various other effective structures.

As mentioned above, the power supply device of the present invention uses AC
When the adapter is stored in the housing compartment, the lid that was blocking the power cord insertion opening will automatically close against the spring force, and vice versa.
When the adapter is removed from the housing, the lid that opens the power cord insertion opening is automatically closed by a spring.

Therefore, according to the present invention, when the AC adapter is not in use, the opening for inserting the power cord can be always closed by the lid, which prevents foreign objects from being inserted into the opening and causing various inconveniences. You can prevent things from happening. Also, a very favorable appearance can be obtained. Furthermore, since the lid can be opened and closed automatically by attaching and detaching the AC adapter, it is much easier to operate than when the lid is closed every time with a separate lid (there is no need to open or close the lid at all). Another advantage is that there is no need to forget to close the lid when the AC adapter is not in use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and
Fig. 1 is an exploded perspective view of the entire structure, Fig. 2 is a plan view of the dry battery stored in the battery compartment, Fig. 3 is a cross-sectional view as seen from Fig. 2 - line arrow, and Fig. 4 is the battery compartment. The top view, Figures 5A and 5B show the state in which the AC adapter is stored inside the battery compartment.
Figure 4 explains how to insert the AC adapter.
6A and 6B are rear views illustrating the opening/closing operation of the lid provided in the opening for inserting the power plug, and FIG.
FIGS. 8A and 8B are sectional views taken from FIG. 4 as seen from the line, and FIG. 9 is a sectional view from FIG. 2 taken from the line. 10 is a plan view showing a modified example of the opening/closing structure of the lid, and FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10. Further, FIG. 12 is a cross-sectional view shown for reference in order to explain the inconvenience of inserting the AC adapter into the battery storage part, and FIG. 13 is a cross-sectional view shown as a reference example of the dry cell holding structure. In addition, in the symbols used in the drawings, 1...electronic device, 2...casing, 3...battery storage part constituting an example of an AC adapter storage part, 21...AC
Adapter, 26...jack for power cord insertion, 32...power cord, 33...power plug,
64...Opening for power cord insertion, 66...Lid body, 68...Return spring.

Claims (1)

[Scope of utility model registration request] An electronic device housing is provided with a storage section for storing an AC adapter and an opening for inserting a power cord leading into the storage section, a lid body for opening and closing the power cord insertion opening, and a lid body for biasing the lid body into a closed state. When the AC adapter is stored in the housing, the lid is pushed by the AC adapter and opened against the spring, and the power cord is inserted through the power cord insertion opening. A power supply device configured so that it can be plugged in to supply power to the above AC adapter.