JP2002109985A - Switch with luminescent display incorporating current detection element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch with luminescent display incorporating a current detection element which can connect lead wires of both ends of a primary winding and both ends of a secondary winding with a current detection element, a luminous element lighting circuit and a connection terminal without guiding the lead wires manually, curtail the rate of manual work in an assembly process of the current detection element and promote automatization in manufacturing process. SOLUTION: In an apparatus body 1 consisting of a top case 2 and a bottom case 3 is packaged a middle frame body 4, below which, a current detection body 6 equipped with a current detection element consisting of a primary winding 10 and a secondary winding 11 is arranged, and at same time, at an upper part of the middle frame body 4 is arranged a switch mechanism 7, both ends of the primary winding 10 are connected to power source terminal 20 constituting the switch mechanism 7 and a support plate 22 of a movable contact 21 respectively, and the secondary winding is connected to a circuit board 14 of a luminescent element arranged over the switch mechanism through connection pins 25, 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch with a built-in light-emitting display for detecting current supplied by a current-detecting element which emits light when a current is supplied.

[0002]

2. Description of the Related Art Conventionally, as this type of switch with a light emitting display with a built-in current detecting element, the current detecting element is constituted by a current transformer, and is connected to a secondary winding by energizing the primary winding of the current transformer. A light emitting display such as a light emitting diode has been proposed. In these switches, the lead wires at both ends of the primary winding of the current transformer are led to the terminal plate and connected by soldering, and the lead wires at both ends of the secondary winding of the current transformer are led to the terminal plate and soldered similarly. Had to be connected.

[0003]

However, in the above-mentioned switch, the lead wires at both ends of the primary winding and the lead wires at both ends of the secondary winding must be led to the terminal plate and soldered. There was a problem in promoting automation because the specific gravity of manual work became large.

The present invention solves the above-mentioned problems, and can connect a current sensing element to a light emitting element circuit and a connection terminal without manually leading both ends of a primary winding and both ends of a secondary winding,
An object of the present invention is to provide a switch with a light-emitting display with a built-in current sensing element, which can reduce the specific gravity of manual work in the process of assembling the current sensing element and promote automation in the manufacturing process.

[0005]

According to the present invention, there is provided a switch having a light-emitting display with a built-in current sensing element according to the present invention, in which an insulative middle frame is housed in a housing comprising an upper case and a lower case. A current sensing element having a current sensing element comprising a primary winding and a secondary winding is arranged below the middle frame, and a switch mechanism is arranged above the middle frame, and Both ends of the wire are connected to the power supply terminal and the support plate of the movable contact constituting the switch mechanism, respectively,
The secondary winding is connected to a light emitting element circuit disposed above the switch mechanism via a connecting pin formed integrally with the current detecting element.

[0006] The current detector is formed of a bobbin,
A secondary winding of the current sensing element is wound around the bobbin,
What is necessary is just to be able to achieve automation.

The connection pin may be provided integrally with the bobbin so that both ends of the secondary winding wound around the bobbin can be directly connected to the connection pin.

[0008] The bobbin is provided with primary winding supporting columns for supporting both ends of the primary winding, and the ends of both ends of the primary winding are positioned above the ends of the primary winding supporting columns. It is preferable that the position of the end of the primary winding is fixed.

Further, the tip of the primary winding support column may be formed in a conical shape so that it can be smoothly engaged with the middle frame placed on the current detector.

[0010] Further, the front end of the primary winding support column is engaged with the middle frame body, and the front end of both ends of the primary winding is connected to a power supply terminal and a movable contact support plate. A positioning hole for guiding each hole is provided,
It is preferable that both ends of the primary winding can properly correspond to the joint hole of the power supply terminal and the joint hole of the support plate.

[0011]

FIG. 1 is an exploded perspective view of a switch with a light emitting display with a built-in current detecting element (hereinafter referred to as a switch) according to the present invention, and FIG. 2 is a switch with an upper case 2 and an operator 15 removed. FIG. This switch is a three-way switch in which an insulating middle frame 4 is housed in a body 1 composed of an upper case 2 and a lower case 3.
A current sensing element 6 having a current sensing element 5 including a primary winding 10 and a secondary winding 11 is disposed below the middle frame 4, and a switch mechanism 7 is provided above the middle frame 4. Circuit board 14 on which light emitting elements 12 and 13 are mounted, operator 15
Is disposed, and the lighting state of the light emitting diode 12 and the neon lamp 13 as the light emitting elements mounted on the circuit board 14 can be visually recognized through the light transmitting plate 17 attached to the opening 16 at the center of the operation element 15. The lighting circuit is configured so that the neon lamp 13 lights up when the load is turned off, and the light emitting diode 12 lights up when the load is turned on.
0 a and 10 b are connected to a power supply terminal 20 and a support plate 22 supporting a movable contact 21, respectively, which constitute a part of the switch mechanism 7.
a and 11b are connected to the circuit board 14 disposed above the switch mechanism via connection pins 25 and 26 formed integrally with the current detection element 5.

The upper case 2 is a rectangular box having a lower surface entirely open and an opening 27 for exposing the upper surface of the operation element 3 on the upper surface. The operation element 15 is rotatably supported on the upper surface. A hook 2a is formed at four corners of the lower surface so as to protrude downward.

The lower case 3 has an upper surface entirely open and an electric wire insertion hole 30 (FIG. 5) for individually inserting electric wires at the bottom surface.
Release member 3 for releasing the lock of the inserted electric wire.
A tool insertion slot 32 (FIG. 4) for inserting a tool for operating
), And locking projections 3 a are formed on both side surfaces of the lower case 3.

The upper case 2 and the lower case 3 are connected to the hook 2a formed on the upper case 2 by the lower case 3
The lower case 3 and the upper case 2 are integrated with each other by locking the locking projections 3a formed in the above, so that a box-shaped body 1 as a whole can be formed.

Inside the body 1, a current detector 6 and a middle frame 4
The power supply terminal 20, the fixed terminal 23, and the switching terminal 24, which are connection terminal portions to which the electric wires are connected, are arranged on the middle frame 4, and correspond to these terminals. A pressing spring 33 (see FIG. 5), which is arranged above the insertion hole 30 and locks the inserted electric wire and conducts the electric wire and each terminal, is arranged to constitute a so-called screwless terminal.

Then, as shown in FIG.
Between the switching terminal 24 and the switching terminal 24, there is disposed a conductive plate 22 having a substantially V-shaped side view and having conductivity and elasticity, which is always urged upward by a spring 35 and supports the movable contact 21.

When the movable contact 21 is turned right and left in FIG. 5, the movable contact 21 a is fixed to the fixed contact 23 a of the fixed terminal 23.
Selectively contact with the switching contact 24a of the switching terminal 24,
The switch mechanism is configured to connect and disconnect the electric circuit.

The movable contact 21 is rotatably driven by the operating element 3 so that the movable contact 21a is selectively fixed.
a and the switching contact 24a, and the operator 3 has a light transmitting plate 1 made of a transparent resin in the center of the opening 40 through which the light of the light emitting diode 12 and the neon lamp 13 passes.
7, a drive arm 41 that engages with the upper end of the drive piece 21b of the movable contact 21 projects downward from the center lower surface on both sides in the longitudinal direction, and operates a makeup operation plate (not shown). The mounting claw 42 mounted on the child 3 has an opening 40
At the center of both sides, a support shaft 46 swingably supported by a bearing portion 28 formed on the upper cover 2 is formed to protrude laterally.

The current detector 6 includes a current transformer including a secondary winding 11 wound around a bobbin 50 and a primary winding 10 formed of an air-core coil. A primary winding support column formed integrally with a core holding the wire 10 and having an insertion groove 53b formed on one of the upper surfaces of the bobbin 50 for inserting the lead portions 10a and 10b at both ends of the primary winding 10. 53 are formed so as to protrude upward, and lead portions 11 at both ends of the secondary winding 11 are provided on the upper surface of the bobbin 50 symmetrical to the primary winding support column 53.
Connection pin posts 54, 55 having insertion holes 54a, 55a into which the secondary winding connection pins 25, 26 to which a and 11b are connected are formed to project upward and stand upright.

The primary winding support column 53 has an insertion groove 53b formed on the outside from the upper end to the lower end, and a tip 53a is formed in a conical shape. The conical positioning holes 58a and 58b can be properly engaged.

As shown in FIGS. 6 (a) and 6 (b), both ends of the secondary winding connection pins 25, 26 are connected to the connection pin posts 54, 5
The length of the bobbin 5 is set so as to protrude from the upper end and the lower end of the bobbin 5, respectively.
And the lead portions 11a, 1a at both ends of the secondary winding 11 wound around
1b is wound around each, and the secondary winding 11 and the secondary winding connection pins 25 and 26 are electrically connected. After the secondary winding 11 is wound around the bobbin 50 by an automatic machine, the secondary winding connection pin 25
26, so that the secondary winding 11 and the secondary winding connection pins 25, 2a can be automatically wound around the lower ends 25a, 26a without a manual soldering step.
6 can be automatically soldered and electrically connected.

On the other hand, as shown in FIG. 7, the primary winding 10 of the air-core coil shape is formed by bobbin 5 while inserting lead portions 10a and 10b at both ends into insertion grooves 53b of the primary winding supporting column 53.
In this case, the secondary winding 11 may be fitted from below to cover the secondary winding 11, and the ends of the lead portions 10 a and 10 b may protrude from the end of the primary winding support column 53. In this state, the central fitting projections 51a, 51b of the cores 51, 52 are inserted into the through holes 5 of the bobbin 50.
0a, the bobbin 50 is sandwiched from above and below while accommodating the primary winding 10 in the circular accommodating grooves 51b, 52b, and the cores are adhered to each other by appropriate means such as an adhesive. As shown in FIG. 8, the current detector 6 can be formed.

As described above, the step of preparing the current detector 6 does not require a manual process such as soldering, so that it is possible to incorporate automation, thereby improving the production efficiency of the current detector 6. Can be.

Then, the middle frame 4 is placed on the current detector 6 formed as described above so as to overlap. At this time, as shown in FIG. 3, the conical tip 53 a of the primary winding support column 53 has a positioning hole 58 formed in the middle frame 4.
a, 58b, and the lead portions 10a,
The tip of 10b projects upward through the positioning holes 58a and 58b. The power supply terminal 20 and the support plate 22 each have a conical joint hole 56 that expands downward.
57, the lead portion 1 of the primary winding 10
The distal ends of Oa and 10b can be smoothly penetrated into the joint holes 56 and 57, and the distal ends protruding from the joint holes 56 and 57 may be soldered to the power terminal 20 and the support plate 22, respectively. As a result, the primary winding 10 is electrically connected between the power terminal 20 and the support plate 22, as shown in the circuit diagram of FIG.

When the circuit board 14 is placed on each terminal, the ends of the upstanding terminals 60 and 61 formed on the upper surface of the fixed terminal 23 and the switching terminal 24 are joined to the bonding holes 62 formed in the circuit board 14. 63, the joining holes 62, 6
3 and the ends of the upstanding terminals 60 and 61 protruding from the circuit board 1.
4 may be soldered to the joint holes 62 and 63, respectively.
As a result, as shown in the circuit diagram of FIG. 9A, the neon lamp lighting circuit a is electrically connected to the fixed terminal 23 and the switching terminal 24.

Further, the secondary winding connection pins 2 projecting from the upper ends of the connection pin posts 54, 55 formed on the bobbin 50
Since the tips 25b and 26b of the pins 5 and 26 pass through the joint holes 65 and 66 of the circuit board 14, the tips 25b and 26b of the connection pins 25 and 26 are soldered to the joint holes 65 and 66 of the circuit board 14, respectively. Accordingly, as shown in the circuit diagram of FIG. 9A, the secondary winding 11 is electrically connected to the light emitting diode lighting circuit b via the connection pins 25 and 26. In FIG. 9, reference numeral 18 denotes a diode for preventing back electromotive force.

According to the above switch, the current detecting element 5
The current detector 6 provided with a current transformer
And the primary winding support pillar 53 formed on the bobbin 50 has lead portions 10a, 10b of the primary winding 10.
, The connecting pin support 54 formed on the bobbin 50,
The lead pins 11a, 11b of the secondary winding 11 are connected to the connection pins 25, 26 inserted through the wiring 55, so that the current sensing element 5 is integrated into the current sensing element 6 and the primary winding 10
, And both ends of the secondary winding 11 can be maintained in a fixed state. The current detector 6 can be incorporated into a switch, and the connection to the switch mechanism 7 and the circuit board 14 can be facilitated. Manual operations can be reduced, and the automation of manufacturing the current detector 6 can be promoted, and the production efficiency of the switch can be increased.

FIGS. 10 to 14 show a single-pole switch. The single-pole switch is a fixed terminal 100 instead of the fixed terminal 23 and the switching terminal 24 used in the switch mechanism 7 for the three-way switch. When the circuit board 14 is placed on the power supply terminal 20 and the fixed terminal 100, the upstanding terminal 102 protruding from the upper surface of the power supply terminal 20 makes the joint hole 103 of the circuit board 14 and the fixed terminal 100. Of the upstanding terminals 101 formed on the upper surface of the circuit board 14 penetrate the bonding holes 104 formed in the circuit board 14 d.
The tips of the upstanding terminals 102 and 101 projecting from the third and fourth 104 may be soldered to the joining holes 103 and 104 of the circuit board 14. As a result, as shown in the circuit diagram of FIG.
And the fixed terminal 100 are electrically connected,
When the load is OFF (the movable contact 21a and the fixed contact 100a are open), the neon lamp 13 is turned on and the load is ON.
If (the movable contact 21a and the fixed contact 100a are short-circuited), the neon lamp 13 is turned off and the light emitting diode 12 can be turned on.

[0029]

According to the first aspect of the present invention, the current detector, the middle frame, the switch mechanism, and the light emitting element circuit can be housed in the body in a stacked manner, so that the work of assembling the switch is facilitated. In addition, both ends of the primary winding and both ends of the secondary winding of the current sensing element provided on the current sensing element can be easily connected to the switch mechanism and the light emitting element circuit without manually leading the current sensing element. Can reduce the specific gravity of the manual work in the assembling process, and can promote automation in the manufacturing process.

According to the second aspect of the present invention, the secondary winding formed in a conventional air core coil shape is not used,
By winding a thin secondary winding around a bobbin, automation can be achieved.

According to the third aspect of the present invention, the secondary winding connection pin is provided on the bobbin on which the secondary winding is wound, and the lead of the secondary winding is wound around the secondary winding connection pin. The secondary winding can be easily processed for automation, and it is necessary to connect a separate lead wire at the end of the secondary winding and route this lead wire as before. And the ratio of manual work in the assembly process can be reduced.

According to the fourth aspect of the present invention, the positioning of the ends of the primary winding is constant by supporting the lead portions at both ends of the relatively thick primary winding on the primary winding support pillar, so that the current detecting element is fixed. Can be achieved, and operations such as routing of lead portions in the assembling process can be omitted.

According to the fifth aspect of the present invention, by forming the tip of the primary winding support column into a conical shape, the complexity in assembling with the middle frame is eliminated, and the working efficiency can be improved. .

According to the sixth aspect of the present invention, by providing the positioning holes in the middle frame, the leading end of the primary winding can be reliably guided to the power supply terminals and the joining holes formed in the support plate.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a switch with a light-emitting display with a built-in current sensing element according to the present invention.

FIG. 2 is a plan view showing a state in which an upper case and an operation element of the switch are removed.

FIG. 3 shows a state in which an upper case and an operator are attached.
AA line sectional view of

4A and 4B are a cross-sectional view taken along line BB and an EE line in FIG. 2 in a state where an upper case and an operation element are attached.

5 (a) and 5 (b) are cross-sectional views taken along lines CC and DD of FIG. 2 in a state where an upper case and an operation element are attached.

FIGS. 6A and 6B are perspective views of a bobbin and a perspective view of a bobbin with a secondary winding wound thereon.

FIG. 7 is an exploded perspective view illustrating the configuration of a current detector.

FIG. 8 is a perspective view of the assembled current detector.

9A and 9B are explanatory diagrams of a lighting circuit of a light emitting element in a three-way switch and a single-pole switch.

FIG. 10 is an exploded perspective view of a switch with a light emitting display with a built-in current sensing element for a single pole.

FIG. 11 is a plan view showing a state where an upper case and an operation element of the single-pole switch are removed.

FIG. 12 is a cross-sectional view taken along line AA of FIG. 11 in a state where an upper case and an operation element are attached.

13A and 13B are a cross-sectional view taken along line BB and an EE line in FIG. 11 in a state where an upper case and an operation element are attached.

14 (a) and (b) are cross-sectional views taken along lines CC and DD of FIG. 11 in a state where an upper case and an operation element are attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument body 2 Upper case 3 Lower case 4 Middle frame 5 Current detection element 6 Current detector 10 Primary winding 11 Secondary winding 20 Power supply terminal 22 Support terminal 25, 26 Connection pin 50 Bobbin 53 Primary winding support column 56 , 57 Joint hole 58a, 58b Positioning hole 62, 63, 65, 66 Joint hole

Claims (6)

[Claims] 1. A housing comprising an upper case and a lower case, a middle frame having an insulating property is housed therein, and a current detecting element comprising a primary winding and a secondary winding is provided below the middle frame. And a switch mechanism disposed above the middle frame body, and both ends of the primary winding are connected to a power supply terminal and a movable contact support plate constituting the switch mechanism, respectively. A light-emitting switch with a built-in current detection element, wherein the next winding is connected to a light-emitting element circuit disposed above the switch mechanism via a connection pin formed integrally with the current detection element. 2. The switch with a light emitting display with a built-in current detection element according to claim 1, wherein said current detection body is formed of a bobbin, and a secondary winding of said current detection element is wound around said bobbin. 3. The switch with a light emitting display with a built-in current sensing element according to claim 1, wherein the connection pin is provided integrally with the bobbin. 4. The bobbin is provided with primary winding supporting columns for supporting both ends of the primary winding, and the ends of both ends of the primary winding are positioned above the ends of the primary winding supporting columns. 4. The switch with a light-emitting display with a built-in current sensing element according to claim 1, wherein the switch has a projection. 5. The switch with a light-emitting display with a built-in current sensing element according to claim 4, wherein a tip portion of said primary winding support column is formed in a conical shape. 6. A joint hole provided in the middle frame body, the front end of the primary winding supporting column being engaged with the front end of the primary winding support column, and the ends of both ends of the primary winding being provided in a power supply terminal and a support plate of a movable contact. 2. A positioning hole for guiding each of the guides is provided.
6. A switch with a light-emitting display with a built-in current detection element according to any one of claims 5 to 5.