JPH0424756Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a mounting structure for a light emitting element for indicating the operation of a charger, and more specifically, a charging circuit unit that rectifies a commercial power source and supplies charging current to a secondary battery. A sealing material is housed in the casing and is filled between the entire periphery of the charging circuit and the inner circumferential surface of the casing, and a light emitting element for displaying operation that blinks in response to the operating status of the charging circuit is attached to the outer circumferential surface of the casing. The present invention relates to a mounting structure for a charger display light emitting element of a charger that is mounted in an exposed manner.

[Background Art] In general, in this type of charger equipped with a light emitting element for displaying operation that blinks in response to the operation of the charging circuit, the charging circuit is Some devices have a waterproof structure by filling a sealing material between the periphery of the light emitting element and the casing, but in this case, it is necessary to form an opening in the casing to expose the light emitting element.
When the sealing material is filled into the casing, the sealing material leaks from between the outer circumferential surface of the casing and the inner circumferential surface of the opening. For this reason, conventionally the light emitting element was placed in a different part of the casing from the part filled with the sealant, and the charging circuit and the light emitting element were connected using lead wires. I needed to. As a result, it was difficult to position the light emitting element, and wiring of the lead wires was time-consuming.

[Purpose of the invention] The present invention has been made in view of the above-mentioned points, and its main purpose is to display the operation of the charging circuit on the board on which the circuit elements constituting the charging circuit are mounted. By fixing the light-emitting element that displays the status, it is possible to avoid the trouble of extending the wiring of the light-emitting element with lead wires, and another purpose is to facilitate the positioning of the light-emitting element. Another objective is to prevent the sealant from leaking between the outer circumferential surface of the light emitting element and the inner circumferential surface of the opening when the light emitting element is attached to the part of the casing to be filled with sealant. The goal is to prevent it from leaking out.

[Disclosure of the invention] Hereinafter, embodiments of the invention will be described based on the drawings. In the mounting structure of the light emitting element for displaying the operation of the charger according to the present invention, a charging circuit section 1 that step-down rectifies a commercial power source and supplies charging current to a secondary battery is mounted on a casing 2.
The charger is housed in a charging circuit section 1 and is filled with a sealing material 3 between the entire periphery of the charging circuit section 1 and the inner circumferential surface of the casing 2. A light emitting element 6 for displaying an operation is fixed on the substrate 5 and flashes in response to the operating state of the charging circuit section 1, and the light emitting element 6 is formed on the peripheral wall of the casing 2. casing 2 so that one end is inserted into the opening 7
A contact means 8 is formed in the opening 7 to be exposed to the outer periphery of the light emitting element 6 and close to the outer peripheral surface of the light emitting element 6 to close the opening in a watertight manner.

As shown in FIG. 1, the casing 2 is composed of a main body 15 with one end open, and a cover plate 16 that closes the opening of the main body 15. A recess 10 is formed into which a charging member is inserted. A terminal block 11 is disposed on the bottom wall of this recess 10, and the back surface of the terminal block 11 is supported by a protrusion 17 projecting from a cover plate 16.
As shown in FIG. 6, a plurality of protrusions 9 extend around the cover plate 16, and by caulking the protrusions 9, the cover plate 16 is fixed to the main body 15. Terminal block 1
A flange 18 is extended at the bottom of the casing 2, and a boss 19 protruding from the bottom wall of the casing 2 is inserted through the flange 18 and the tip of the boss 19 is caulked, thereby fixing the terminal block 11 to the casing 2. be done. As shown in FIGS. 2 and 3, the casing 2 accommodates a charging circuit section 1 configured by disposing a circuit element 4 such as a transformer 20 on a substrate 5, and the surrounding area of the charging circuit section 1 is A watertight sealing material 3 such as a resin mold is filled between the inner peripheral surface of the casing 2 and the inner peripheral surface of the casing 2 . Therefore, the charging circuit section 1 is not exposed to external moisture, and the charging circuit section 1
Failure due to moisture is prevented.
By the way, as shown in FIG. 9, the charging circuit section 1 includes a transformer 20, a pair of rectifier diodes 21,
It is configured by circuit elements 4 such as 22, and is configured to step down and rectify commercial power and supply it to a load L or a secondary battery B. These circuit elements 4 are fixed on a substrate 5. That is,
The input terminal 23 of the transformer 20 is connected to the power cord 13 introduced through the bushing 12 press-fitted into one side wall of the casing 2, and the output terminal 24 of the transformer 20 is directly attached to the board 5 together with diodes 21 and 22. . Further, a light emitting diode 6 for displaying charging is connected to the substrate 5.
The light emitting diode 6 is exposed to the outside through an opening 7 formed in the casing 2.
As shown in FIG. 4, the opening has a shape in which the first protrusion 31, the straight part 32, the second protrusion 33, and the reflective part 34 are continuous from the inside to the outside along the thickness direction of the peripheral wall of the casing 2. It is formed over the entire circumference of the portion 7 in the circumferential direction. Each of the protrusions 31 and 33 has a substantially triangular cross section, and the inner diameter of its tip is slightly smaller than the outer diameter of the light emitting diode 6. Further, the straight portion 32 is formed to have an inner diameter larger than the outer diameter of the light emitting diode 6. A locking rib 3 is provided on the periphery of the opening 7 and on the inner peripheral surface of the casing 2.
5 is formed. When the light-emitting diode 6 is inserted into the opening 7, the first protrusion 31 and the second protrusion 33 come into pressure contact with the circumferential surface of the light-emitting diode 6, as shown in FIG. is held within the opening 7. In this way, each protrusion 31, 33 is formed on the circumferential surface of the light emitting diode 6.
As a result of the pressure contact, the opening 7 is closed in a watertight manner. Further, since an outer crocodile 36 is provided protruding from the rear end of the light emitting diode 6, the mounting position of the light emitting diode 6 is determined by the outer crocodile 36 coming into contact with the locking rib 35. A lead wire 25 connected to the terminal block 11 is pulled out from the board 5, and a lead wire 27 to a switch 26, which will be described later, is pulled out.In this way, the light emitting diode 6 is placed in the opening 7 of the casing 2 in a watertight manner. By being held, the inside of the casing 2 can be sealed even though the opening 7 is formed in the casing 2. Therefore, when assembling, first place the charging circuit section 1 in the casing 2, and then insert the light emitting diode 6.
is attached to the opening 7, then the sealing material 3 is filled into the casing 2, and finally the cover plate 16 is closed. Even when assembled in this manner, the opening 7 is completely closed, so the sealing material 3 will not leak.

In the above example, the first protrusion 31 which is the contact means 8
Although an example is shown in which the second protrusion 32 is formed integrally with the casing 2, as shown in FIG. 7, it is formed around the opening 7 of the casing 2 using a material with greater elasticity than other parts The bushing 37 may be molded in two colors and used as the adhesion means 8. In this case as well, it is desirable to form at least one protrusion 38 on the inner peripheral surface of the opening 7.

To attach the charger A thus formed to a wall W or the like, a hanger 40 is used as shown in FIGS. 3 and 8. That is, a pair of rail grooves 41 facing each other are formed on both side edges of the side surface of the casing 2, and by fitting both side edges of the hanger 40 fixed to the wall W into the rail grooves 41, the hanger 40 and The casing 2 is connected to the casing 2. hanger 40
A mounting piece 44 in which a screw hole 43 is formed into which a screw 42 for fixing to the wall W is inserted is extended, and an engagement recess 45 is formed in the widthwise center of the hanger 40. A spring piece 46 and a switch push plate 47 that abuts a switch button 48 of the switch 26 exposed on the side surface of the casing 2 are extended. When the hanger 40 is completely coupled to the casing 2, the coupling recess 45 fits into a protrusion 49 protruding from the side surface of the casing 2, and the switch push plate 47 pushes down the switch button 48. A stopper 50 is provided on the hanger 40 to prevent the hanger 40 from being inserted further into the casing 2 once it reaches a predetermined position. The protrusion 49 is formed with an inclined surface so that it can be easily introduced into the engagement recess 45, and once fitted, it is prevented from coming off. Therefore, in order to remove the casing 2 from the hanger 40, it is sufficient to push one end of the spring piece 46 toward the wall W to release the engagement between the engagement recess 45 and the protrusion 49. The switch 26 is connected to the secondary battery B as shown in FIG.
It is possible to switch between a float charging state in which charging current flows through the current limiting resistor 28 and a normal charging state in which charging is performed for a fixed period of time without passing through the current limiting resistor 28.The casing 2 is attached to the hanger 40. When the switch button 48 is pressed, the battery is set to enter a float charging state.

The circuit configuration of the charging circuit section 1 may be replaced with the above-described circuit and may be a circuit in which a light emitting diode 29 is connected in series with a current limiting resistor 28, as shown in FIG.
In this way, in the float charging state, the light emitting diode 29 lights up to indicate that float charging is in progress. In addition, the 9th
In the figure and FIG. 10, 30 is a current limiting resistor of the light emitting diode 6.

[Effect of the invention] As described above, in the present invention, the light emitting element is inserted into the opening formed in the peripheral wall of the casing, one end is exposed to the outer periphery of the casing, and the light emitting element is tightly attached to the outer peripheral surface of the light emitting element within the opening. Since the aperture is completely closed by the light-emitting element and the adhesion means, the light-emitting element is attached corresponding to the part to be filled with the sealant. There is an advantage in that the sealing material can be prevented from leaking out of the casing from between the outer circumferential surface of the light emitting element and the inner circumferential surface of the opening. As a result, the light emitting element can be directly mounted on the substrate on which the circuit elements constituting the charging circuit section are mounted, and there is no need to extend the wiring of the light emitting element with lead wires. Also,
Since the light emitting element is held by the close contact means within the opening, there is an advantage that positioning of the light emitting element is easy.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an embodiment of the present invention;
Figure 2 is a longitudinal cross-sectional view of the same as above, Figure 3 is a cross-sectional view of the same as above, Figure 4 is a cross-sectional view of the vicinity of the opening in the same as above with no light emitting diode attached, and Figure 5 is a view of the light emitting diode in same as above. A cross-sectional view of the vicinity of the opening in the attached state, FIG. 6 is a perspective view of the lid plate used in the above, FIG. 7 is a cross-sectional view showing another example of the vicinity of the opening of the above, and FIG. 8 is a hanger of the same as the above. FIG. 9 is a circuit diagram showing an example of the charging circuit used in the above, and FIG.
FIG. 0 is a circuit diagram showing another example of the charging circuit section used in the above. 1 is a charging circuit section, 2 is a casing, 3 is a sealing material, 4 is a circuit element, 5 is a board, 6 is a light emitting element, 7
8 is an opening, 8 is a contact means, 31 is a first protrusion, 33
is the second protrusion, and 37 is the bushing.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A charging circuit unit that rectifies commercial power and supplies charging current to a secondary battery is housed in a casing, and the entire periphery of the charging circuit unit and the inner peripheral surface of the casing The charger is a charger with a sealing material filled between the parts, and the circuit elements constituting the charging circuit are fixed on a board disposed inside the casing. A light-emitting element for indicating an operation that flashes is fixed, and the light-emitting element is formed on the peripheral wall of the casing and is inserted into the opening so that one end is exposed to the outer periphery of the casing. A mounting structure for a light-emitting element for indicating the operation of a charger, in which a contact means for watertightly closing an opening is formed. (2) In the mounting structure for a light-emitting element for indicating operation of a charger as set forth in claim 1 of the utility model registration claim, the adhesion means is a protrusion formed on the inner peripheral surface of the opening all the way around in the circumferential direction. One in which multiple protrusions are formed along the mouth axis direction of the opening. (3) In the mounting structure for a light-emitting element for indicating the operation of a charger as set forth in claim 1 of the utility model registration claim, the contact means is a bushing made of an elastic material and formed around the entire circumference of the opening. hand,
Something that is integrated with the casing.