JPH0443937Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a switch that moves a switch knob to move a movable contact of a contact blade toward and away from a fixed contact of a contact holder.

BACKGROUND ART Conventionally, this type of switch has been known to have various structures. For example, as shown in FIG. 7, a contact holder 35 is formed by bending a rectangular metal plate into a U-shape by press bending, and the bottom of the contact holder 35 is attached to a holder receiving member 38 fixed in the switch case 32. Rivet 35b 4
2, fixed contacts 37, 37 are fixed to the receiving member 38, and the contact holder 35
A substantially V-shaped contact blade 34 is tiltably mounted on both upward ends 35a, 35a, and movable contacts 36, 36 are provided at both ends of the contact blade 34.
is fixed, and the blade connecting portion 33a of the switch knob 33 is brought into contact with the bent portion 34a of the contact blade 34 with the biasing force of the spring 39,
By tilting the switch knob 33, the contact blade 34 is tilted in one direction using either end 35a, 35a of the contact holder 35 as a fulcrum, and one movable contact 36 of the contact blade 34 is moved to one side of the holder receiving member 38. There is one that is configured so as to be brought into contact with the fixed contact 37 of.

In addition, as shown in FIG.
1a and 41a to form the contact holder 41, and the V-shaped contact blade 4.
A plate portion 40c is formed in the bent portion 40a of the contact blade 40, and the plate portion 40c of the plate-shaped bent portion 40a of the contact blade 40 is inserted into the notch 41 of the contact holder 41.
a, 41a so as to be tiltable along the longitudinal direction of the notch, and by tilting the switch knob 33, the plate portion 40 of the plate-shaped bent portion 40a of the contact blade 40 is
either end 40b of c and the contact holder 4
The contact blade 40 is tilted in one direction using the point of contact with one corner of both notches 41a, 41a of the contact blade 40 as a fulcrum, and one movable contact 36 of the contact blade 40 is connected to the holder receiving member 38 as one fixed contact. 37.

Problems to be Solved by the Invention However, in the former method, the contact holder 35 is formed by press bending, and the contact holder is fixed to the contact holder receiving member with rivets, so manufacturing errors during bending occur. Due to installation errors caused by rivets or rivets, a step may occur at both ends 35a, 35a of the contact holder 35, or twisting may occur between both ends 35a, 35a with respect to the bottom 35b, as shown in FIGS. 8 and 9. As a result, contact blade 34
The contact force between the movable contact 36 and the fixed contact 37 of the contact blade 34 differs depending on the direction in which the contact blade 34 is tilted, and the contact force between the two contacts becomes uneven, resulting in a poor operating feel. In addition, in the latter case, as shown in FIGS. 12, 13, and 14, a step may occur at the position of the notch edges of the notches 41a and 41a at both ends of the contact holder 41, and
41a may be out of phase in the longitudinal direction of the notch or may be twisted relative to each other, and the contact force between the movable contact 36 and the fixed contact 37 of the contact blade 40 will differ depending on the tilting direction of the contact blade 40, and the contact force between both contacts may be uneven. There was a problem that it became uniform and the operation feeling became worse.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a switch in which the contact force between the movable contact and the fixed contact is uniform, and the operating feeling is improved, in order to solve the above-mentioned problems.

Means for Solving the Problems In order to achieve the above object, the present invention is configured such that the edge of the flat contact holder is formed as a tilting fulcrum of the contact blade. That is, the contact holder is formed of a flat plate, and is integrally fixed to the contact holder receiving member, and the bent part of the contact blade is brought into contact with an edge formed by press punching on the flat plate, so as to face the bent part of the contact blade. The bent portion of the contact blade is configured to tilt using the tilting side edge of the contact holder as a fulcrum.

Effect of the invention In the above structure, the contact blade is tilted using the edge of the flat contact holder as a fulcrum, and the movable contact of the contact blade is brought into contact with the fixed contact of the contact holder receiving member.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, the switch 1 according to this embodiment has a contact holder receiving member 12 fixed in the switch case 2, and a contact holder 5 and a fixed contact 7 fixed to the receiving member 12. On the other hand, a contact blade 4 is tiltably mounted on the contact holder 5 in a substantially V-shape, a movable contact 6 is fixed to both ends of the contact blade 4, and a bent portion 4a of the contact blade 4 is mounted.
The blade connecting portion 3a of the switch knob 3 is brought into contact with the spring force, and the contact blade 4 is tilted to either side using the contact portion between the contact blade 4 and the contact holder 5 as a fulcrum by tilting the switch knob 3. One movable contact 6 of the contact blade 4 is brought into contact with one fixed contact 7 of the holder receiving member 12.

The switch knob 3 has a connecting portion 3a integrally formed on the lower surface of the center of the rectangular operation surface 3b, and
The contact 9 urged downward by the urging force of the spring 8 is fitted into the connecting portion 3a. The lower end surface of the contactor 9 is curved into a spherical shape, and is constantly in contact with the upper surface of the bent portion 4a of the contact blade 4 by the biasing force of the spring 8. This switch knob 3 is supported within a rectangular switch case 2 so as to be tiltable in two directions along the longitudinal direction.

The contact holder receiving member 12 is made of a synthetic resin insulator and is fixed to the lower part of the switch case 2. A contact holder 5 is integrally fixed to the upper center of the contact holder receiving member 12 by insert molding during resin molding, and a fixed contact 7 is installed near the contact holder 5 and along the tilting direction of the contact blade 4. ,7
Fix each.

As shown in FIG. 3, the contact holder 5 has a hole 5a formed by punching the central part of a flat conductive metal plate into an I-shape using a press.
A pair of opposing protruding edges 5b, 5b protruding inward
as the tilting fulcrum of the blade 4, both end edges 5b, 5
The bent portion 4a of the contact blade 4 is placed between the contact holder 5 and the contact blade 4, and the contact holder 5 and the contact blade 4 are brought into contact with each other. Further, a protruding end 5c protruding outward of the contact holder receiving member 12 is formed at one corner of the contact holder 5,
This protruding end 5c is connected to a connection terminal (not shown) of a switch circuit.

As shown in FIG.
A movable contact 6 is fixed to each end portion 4b, 4b so that when the contact blade 4 is placed on the contact holder 5, each movable contact 6 faces each fixed contact 7. Make it. Since the bent portion 4a of the contact blade 4 is fitted into the hole 5a of the contact holder 5, displacement of the contact holder 4 in the width direction is regulated by the periphery of the hole 5a.

According to the above configuration, in the neutral position A of the switch knob 3 shown by the solid line in FIG. Both end edges 5b, 5b of the contact holder 5 are in contact with the bent portion 4a of the contact blade 4.

When one end of the switch knob 3 is pressed as shown by the arrow _F0 in the figure from the neutral position A, the switch knob 3 rotates around the center O.
The contact 9 is connected to the bent portion 4a of the contact blade 4.
It begins to slide toward one end. Then, when the switch knob 3 is further pressed as indicated by arrows F ₂ and F ₃ in order from F ₁ , the contact 9 slides on the contact blade 4 and enters the connecting portion 3 a of the switch knob 3 . 9 passes through position B (indicated by a dotted line in the figure) where the tip of contact holder 5 passes through the contact point between one edge 5b and blade 4.
Using the contact point as a fulcrum, the contact 9 of the switch knob 3 presses and urges the contact blade 4 to move clockwise, and the contact blade 4 begins to move clockwise, and when the contact 9 reaches the contact position C. As shown by the two-dot chain line in the figure, the movable contact 6 contacts the fixed contact 7 with a contact force P. The contactor 9 is placed at a tilting limit position D indicated by a dashed line in the figure.
tilt up to.

After the switch knob 3 reaches the tilting limit position D, a pressing force is applied to one end of the switch knob 3.
When F ₃ is removed, switch knob 3 automatically returns to neutral position A. That is, at the tilting limit position D, the contactor 9 receives a component force Q in the return direction when a force _W3 is acting on the contact blade 4.
is generated, the contactor 9 slides on the upper surface of the contact blade 4 due to this component force Q, and returns the switch knob 3 to the neutral position A. In addition, in the figure,
W ₀ to W ₃ represent the pressing forces that are applied from the contactor 9 to the contact blade 4 when F ₀ to F ₃ are applied to the switch knob 3, respectively.

According to the above embodiment, the edges 5b, 5b of the contact holder 5 with which the contact blade 4 comes into contact are formed not by bending by a press but by punching, so that the gap between the two edges 5b, 5b is The shape accuracy can be improved compared to the conventional press bending process, and even if the switch knob 3 is tilted in any direction, the contact force P with which the movable contact 6 contacts the fixed contact 7 remains almost constant and remains uniform. The operating feel also improves. In addition, since the contact holder 5 can form the end edges 5b, 5b with higher accuracy than the conventional press bending process, after the contact holder 5 is fixed to the contact holder receiving member 12, the end edges 5b, 5b
There is no need to adjust the positions of b, 5b, etc., insert molding can be performed during resin molding of the receiving member 12, and there is no need to use rivets when fixing the contact holder 5 to the receiving member 12. Therefore, in conventional switches, the contact holder is fixed to the contact holder receiving member with a rivet, and the rivet is connected to the contact terminal of the switch circuit. Contact resistance occurred between the members, but since the above embodiment does not require rivets, the protruding end 5c of the contact holder 5 is made to protrude outward from the contact holder receiving member 12 and connected to the connection terminal of the switch circuit. Since the contact resistance is reduced, the quality can be improved. Conventionally, when the contact holder is fixed to the receiving member with rivets, if the entire switch is heated due to the environment around the switch, the metal contact holder is connected to the contact terminal of the switch circuit against the synthetic resin contact holder receiving member. The rivet and metal contact holder undergo large thermal expansion, causing looseness between the receiving member and the rivet and contact holder, increasing the contact resistance between the contact holder and the rivet or causing poor contact between the two members. I had a problem. However, in the above embodiment, the contact holder 5 receiving member 12 is directly connected to the contact terminal of the switch circuit.
Since the insert molding is performed on the receiving member 12 and the contact holder 5, even if the receiving member 12 and the contact holder 5 are heated, the expansion coefficient of the receiving member 12 is smaller than that of the contact holder 5, and there is no wobbling between the two members. , 12 expand, this does not affect the connection between the contact holder 5 and the contact terminals of the switch circuit, and the above-mentioned conventional problems can be solved.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in various other ways. For example, the contact blade 4 does not necessarily need to be supported by the contact holder 5 in the neutral position, but may be supported by the bottom of the receiving member 12. Even in this case, when the knob 3 is operated, one end edge 5b of the contact holder 5 serves as a tilting fulcrum for the contact blade 4. Further, the knob 3 is not limited to a tilting type, but may be a sliding type. Further, the contact holder 5 may be fixed to the receiving member 12 not only by insert molding but also by a fixing member such as a rivet. Further, as shown in FIG. 5, the contact holder 10 has a T-shaped notch 1 in a flat conductive metal plate.
0a may be punched out using a press, and a pair of opposing protruding edges 10b, 10b may be in contact with the contact blade 4, and this edge 10b may be formed as a fulcrum of the blade 4. Further, as shown in FIG. 6, the contact holder 11 is formed from a flat rectangular conductive metal plate, and one end edge 11a of its outer periphery is configured to contact the contact blade 4 and serve as a fulcrum for the blade 4. The contact blade 4 may be tilted between the non-tilting position shown in FIG. 6 and the tilting position where the other movable contact 6 of the contact blade 4 is in contact with the fixed contact 7. Even in this position, one of the movable contacts 6 always comes into contact with the fixed contact 7. The contact blade 4 has arcuate protrusions 4c, 4c formed on both sides thereof, and the protrusions 4c, 4c fit into the grooves 12a, 1 of the receiving member 12.
2a, the contact blade 4 is prevented from being displaced in the horizontal direction in the figure with respect to the receiving member 12.

Effects of the invention According to the above configuration, the edge of the contact holder that contacts the contact blade is not formed by bending with a press, but the contact holder is formed of a flat plate and is integrally fixed to the contact holder receiving member. In addition, the outer peripheral edge of this contact holder or the edge formed by press punching a notch of a predetermined shape in the contact holder is brought into contact with the contact blade and used as a tilting fulcrum, so that the shape accuracy of the edge is improved. The contact force between the movable contact and the fixed contact remains almost constant regardless of which direction the switch knob moves, resulting in a better operating feel. In addition, since the edge of the contact holder can be formed with high precision, there is no need to adjust the position or shape of the edge after the contact holder is integrally fixed to the contact holder receiving member. The contact holder can also be integrally formed by insert molding or the like during molding, and in this case, the contact holder can be fixed to the receiving member without using rivets.

[Brief explanation of the drawing]

Figures 1 and 2 are a vertical sectional view and a plan view of a switch according to an embodiment of the present invention, Figure 3 is a schematic perspective view showing the relationship between a contact blade and a contact holder, and Figure 4 is a switch knob and a contact blade. FIG. 5 is a perspective view showing a modification of the above embodiment; FIG. 6 a, b
7 and 10 are longitudinal sectional views of two types of conventional switches, respectively, and FIG. 11 shows a contact holder of the switch shown in FIG. Schematic perspective view showing the relationship with the contact blade, Nos. 8, 9, 12,
Figures 13 and 14 are explanatory diagrams showing problems with the contact holders of conventional switches, respectively. 1...Switch, 2...Switch case, 3...
...Switch knob, 3a...Protruding part, 4...Contact blade, 4a...Bending part, 5, 10, 11
... Contact holder, 5a ... Hole, 5b, 10
b, 11a...edge, 6...movable contact, 7...fixed contact, 8...spring, 9...contact, 10a...
Notch, 12...Contact holder receiving member.

Claims (1)

[Scope of claim for utility model registration] Fixed contact 7 and contact holder 5, 10, 11
and a bent portion 4 of a V-shaped contact blade 4 to which a movable contact 6 is fixed.
a is tiltably supported in the switch case 2, and a switch knob 3 for tilting the contact blade 4 is movably provided in the switch case 2, and by moving the switch knob 3, the contact blade 4 is tilted. 4 and the contact holder 5, 10, 11 as a fulcrum, the movable contact 6 is tilted.
In the switch, the contact holders 5, 10, 11 are made of flat plates, and the contact holder receiving member 1 is made to contact the fixed contact 7.
Edges 5b, 10b, 1 integrally fixed to 2 and formed by press punching on the flat plate.
The bent portion 4a of the contact blade 4 is brought into contact with the contact holder 5, 10, 1a so that the bent portion 4a of the contact blade 4 faces the contact holder 1a.
1. A switch characterized in that the switch is tilted using the tilting side edges 5b, 10b, and 11a of No. 1 as fulcrums.